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Update freetype to 2.8.1

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Alex Szpakowski
2017-10-28 22:06:29 -03:00
parent 0c62108e7f
commit 5e763aa7a0
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libs/freetype-2.8.1/docs/CHANGES
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libs/freetype-2.8.1/docs/CMAKE
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Support for a cmake build has been contributed. See the remarks in the
top-level `CMakeLists.txt' file for more.
libs/freetype-2.8.1/docs/CUSTOMIZE
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How to customize the compilation of the library
===============================================
FreeType is highly customizable to fit various needs, and this
document describes how it is possible to select options and
components at compilation time.
I. Configuration macros
The file `include/freetype/config/ftoption.h' contains a list of
commented configuration macros that can be toggled by developers to
indicate which features should be active while building the library.
These options range from debug level to availability of certain
features, like native TrueType hinting through a bytecode
interpreter.
We invite you to read this file for more information. You can
change the file's content to suit your needs, or override it with
one of the techniques described below.
II. Modules list
If you use GNU make please edit the top-level file `modules.cfg'.
It contains a list of available FreeType modules and extensions to
be compiled. Change it to suit your own preferences. Be aware that
certain modules depend on others, as described in the file. GNU
make uses `modules.cfg' to generate `ftmodule.h' (in the object
directory).
If you build FreeType in a directory separate from the source files,
put your customized `modules.cfg' in that directory; that way you
can keep the source files `clean'.
If you don't use GNU make you have to manually edit the file
`include/freetype/config/ftmodule.h' (which is *not* used with if
compiled with GNU make) to add or remove the drivers and components
you want to compile into the library. See `INSTALL.ANY' for more
information.
III. System interface
FreeType's default interface to the system (i.e., the parts that
deal with memory management and i/o streams) is located in
`src/base/ftsystem.c'.
The current implementation uses standard C library calls to manage
memory and to read font files. It is however possible to write
custom implementations to suit specific systems.
To tell the GNU Make-based build system to use a custom system
interface, you have to define the environment variable FTSYS_SRC to
point to the relevant implementation:
on Unix:
./configure <your options>
export FTSYS_SRC=foo/my_ftsystem.c
make
make install
on Windows:
make setup <compiler>
set FTSYS_SRC=foo/my_ftsystem.c
make
IV. Overriding default configuration and module headers
It is possible to override the default configuration and module
headers without changing the original files. There are three ways
to do that:
1. With GNU make
[This is actually a combination of method 2 and 3.]
Just put your custom `ftoption.h' file into the objects directory
(normally `<topdir>/objs' if you build in the source tree, or the
directory where you invoke configure if you build in a separate
directory), which GNU make prefers over the standard location. No
action is needed for `ftmodule.h' because it is generated
automatically in the objects directory.
2. Using the C include path
Use the C include path to ensure that your own versions of the
files are used at compile time when the lines
#include FT_CONFIG_OPTIONS_H
#include FT_CONFIG_MODULES_H
are compiled. Their default values being
<freetype/config/ftoption.h> and <freetype/config/ftmodule.h>, you
can do something like:
custom/
config/
ftoption.h => custom options header
ftmodule.h => custom modules list
include/ => normal FreeType 2 include
...
then change the C include path to always give the path to `custom'
before the FreeType 2 `include'.
3. Redefining FT_CONFIG_OPTIONS_H and FT_CONFIG_MODULES_H
Another way to do the same thing is to redefine the macros used to
name the configuration headers. To do so, you need a custom
`ft2build.h' whose content can be as simple as:
#ifndef FT2_BUILD_MY_PLATFORM_H_
#define FT2_BUILD_MY_PLATFORM_H_
#define FT_CONFIG_OPTIONS_H <custom/my-ftoption.h>
#define FT_CONFIG_MODULES_H <custom/my-ftmodule.h>
#include <freetype/config/ftheader.h>
#endif /* FT2_BUILD_MY_PLATFORM_H_ */
Place those files in a separate directory, e.g.,
custom/
ft2build.h => custom version described above
my-ftoption.h => custom options header
my-ftmodule.h => custom modules list header
and change the C include path to ensure that `custom' is always
placed before the FT2 `include' during compilation.
----------------------------------------------------------------------
Copyright 2003-2017 by
David Turner, Robert Wilhelm, and Werner Lemberg.
This file is part of the FreeType project, and may only be used,
modified, and distributed under the terms of the FreeType project
license, LICENSE.TXT. By continuing to use, modify, or distribute
this file you indicate that you have read the license and understand
and accept it fully.
--- end of CUSTOMIZE ---
libs/freetype-2.8.1/docs/DEBUG
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Debugging within the FreeType sources
=====================================
I. Configuration macros
-----------------------
There are several ways to enable debugging features in a FreeType 2
builds. This is controlled through the definition of special macros
located in the file `ftoption.h'. The macros are:
FT_DEBUG_LEVEL_ERROR
#define this macro if you want to compile the FT_ERROR macro calls
to print error messages during program execution. This will not
stop the program. Very useful to spot invalid fonts during
development and to code workarounds for them.
FT_DEBUG_LEVEL_TRACE
#define this macro if you want to compile both macros FT_ERROR and
FT_TRACE. This also includes the variants FT_TRACE0, FT_TRACE1,
FT_TRACE2, ..., FT_TRACE7.
The trace macros are used to send debugging messages when an
appropriate `debug level' is configured at runtime through the
FT2_DEBUG environment variable (more on this later).
FT_DEBUG_MEMORY
If this macro is #defined, the FreeType engine is linked with a
small but effective debugging memory manager that tracks all
allocations and frees that are performed within the font engine.
When the FT2_DEBUG_MEMORY environment variable is defined at
runtime, a call to FT_Done_FreeType will dump memory statistics,
including the list of leaked memory blocks with the source
locations where these were allocated. It is always a very good
idea to define this in development builds. This works with _any_
program linked to FreeType, but requires a big deal of memory (the
debugging memory manager never frees the blocks to the heap in
order to detect double frees).
When FT2_DEBUG_MEMORY isn't defined at runtime, the debugging
memory manager is ignored, and performance is unaffected.
II. Debugging macros
--------------------
Several macros can be used within the FreeType sources to help
debugging its code:
1. FT_ERROR(( ... ))
This macro is used to send debug messages that indicate relatively
serious errors (like broken font files), but will not stop the
execution of the running program. Its code is compiled only when
either FT_DEBUG_LEVEL_ERROR or FT_DEBUG_LEVEL_TRACE are defined in
`ftoption.h'.
Note that you have to use a printf-like signature, but with double
parentheses, like in
FT_ERROR(( "your %s is not %s\n", "foo", "bar" ));
2. FT_ASSERT( condition )
This macro is used to check strong assertions at runtime. If its
condition isn't TRUE, the program will abort with a panic message.
Its code is compiled when either FT_DEBUG_LEVEL_ERROR or
FT_DEBUG_LEVEL_TRACE are defined. You don't need double
parentheses here. For example
FT_ASSERT( ptr != NULL );
3. FT_TRACE( level, (message...) )
The FT_TRACE macro is used to send general-purpose debugging
messages during program execution. This macro uses an *implicit*
macro named FT_COMPONENT used to name the current FreeType
component being run.
The developer should always define FT_COMPONENT as appropriate,
for example as in
#undef FT_COMPONENT
#define FT_COMPONENT trace_io
The value of the FT_COMPONENT macro is an enumeration named
`trace_XXXX' where `XXXX' is one of the component names defined in
the internal file `internal/fttrace.h'. If you modify FreeType
source and insert new `trace_XXXX' macro, you must register it in
`fttrace.h'. If you insert or remove many trace macros, you can
check the undefined or the unused trace macro by
`src/tools/chktrcmp.py'.
Each such component is assigned a `debug level', ranging from 0 to
7, through the use of the FT2_DEBUG environment variable
(described below) when a program linked with FreeType starts.
When FT_TRACE is called, its level is compared to the one of the
corresponding component. Messages with trace levels *higher* than
the corresponding component level are filtered and never printed.
This means that trace messages with level 0 are always printed,
those with level 2 are only printed when the component level is
*at least* 2.
The second parameter to FT_TRACE must contain parentheses and
correspond to a printf-like call, as in
FT_TRACE( 2, ( "your %s is not %s\n", "foo", "bar" ) )
The shortcut macros FT_TRACE0, FT_TRACE1, FT_TRACE2, ...,
FT_TRACE7 can be used with constant level indices, and are much
cleaner to use, as in
FT_TRACE2(( "your %s is not %s\n", "foo", "bar" ));
III. Environment variables
--------------------------
The following environment variables control debugging output and
behaviour of FreeType at runtime.
FT2_DEBUG
This variable is only used when FreeType is built with
FT_DEBUG_LEVEL_TRACE defined. It contains a list of component
level definitions, following this format:
component1:level1 component2:level2 component3:level3 ...
where `componentX' is the name of a tracing component, as defined
in `fttrace.h', but without the `trace_' prefix. `levelX' is the
corresponding level to use at runtime.
`any' is a special component name that will be interpreted as
`any/all components'. For example, the following definitions
set FT2_DEBUG=any:2 memory:5 io:4 (on Windows)
export FT2_DEBUG="any:2 memory:5 io:4" (on Linux with bash)
both stipulate that all components should have level 2, except for
the memory and io components which will be set to trace levels 5
and 4, respectively.
FT2_DEBUG_MEMORY
This environment variable, when defined, tells FreeType to use a
debugging memory manager that will track leaking memory blocks as
well as other common errors like double frees. It is also capable
of reporting _where_ the leaking blocks were allocated, which
considerably saves time when debugging new additions to the
library.
This code is only compiled when FreeType is built with the
FT_DEBUG_MEMORY macro #defined in `ftoption.h' though, it will be
ignored in other builds.
FT2_ALLOC_TOTAL_MAX
This variable is ignored if FT2_DEBUG_MEMORY is not defined. It
allows you to specify a maximum heap size for all memory
allocations performed by FreeType. This is very useful to test
the robustness of the font engine and programs that use it in
tight memory conditions.
If it is undefined, or if its value is not strictly positive, then
no allocation bounds are checked at runtime.
FT2_ALLOC_COUNT_MAX
This variable is ignored if FT2_DEBUG_MEMORY is not defined. It
allows you to specify a maximum number of memory allocations
performed by FreeType before returning the error
FT_Err_Out_Of_Memory. This is useful for debugging and testing
the engine's robustness.
If it is undefined, or if its value is not strictly positive, then
no allocation bounds are checked at runtime.
------------------------------------------------------------------------
Copyright 2002-2017 by
David Turner, Robert Wilhelm, and Werner Lemberg.
This file is part of the FreeType project, and may only be used,
modified, and distributed under the terms of the FreeType project
license, LICENSE.TXT. By continuing to use, modify, or distribute this
file you indicate that you have read the license and understand and
accept it fully.
--- end of DEBUG ---
libs/freetype-2.8.1/docs/FTL.TXT
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The FreeType Project LICENSE
----------------------------
2006-Jan-27
Copyright 1996-2002, 2006 by
David Turner, Robert Wilhelm, and Werner Lemberg
Introduction
============
The FreeType Project is distributed in several archive packages;
some of them may contain, in addition to the FreeType font engine,
various tools and contributions which rely on, or relate to, the
FreeType Project.
This license applies to all files found in such packages, and
which do not fall under their own explicit license. The license
affects thus the FreeType font engine, the test programs,
documentation and makefiles, at the very least.
This license was inspired by the BSD, Artistic, and IJG
(Independent JPEG Group) licenses, which all encourage inclusion
and use of free software in commercial and freeware products
alike. As a consequence, its main points are that:
o We don't promise that this software works. However, we will be
interested in any kind of bug reports. (`as is' distribution)
o You can use this software for whatever you want, in parts or
full form, without having to pay us. (`royalty-free' usage)
o You may not pretend that you wrote this software. If you use
it, or only parts of it, in a program, you must acknowledge
somewhere in your documentation that you have used the
FreeType code. (`credits')
We specifically permit and encourage the inclusion of this
software, with or without modifications, in commercial products.
We disclaim all warranties covering The FreeType Project and
assume no liability related to The FreeType Project.
Finally, many people asked us for a preferred form for a
credit/disclaimer to use in compliance with this license. We thus
encourage you to use the following text:
"""
Portions of this software are copyright © <year> The FreeType
Project (www.freetype.org). All rights reserved.
"""
Please replace <year> with the value from the FreeType version you
actually use.
Legal Terms
===========
0. Definitions
--------------
Throughout this license, the terms `package', `FreeType Project',
and `FreeType archive' refer to the set of files originally
distributed by the authors (David Turner, Robert Wilhelm, and
Werner Lemberg) as the `FreeType Project', be they named as alpha,
beta or final release.
`You' refers to the licensee, or person using the project, where
`using' is a generic term including compiling the project's source
code as well as linking it to form a `program' or `executable'.
This program is referred to as `a program using the FreeType
engine'.
This license applies to all files distributed in the original
FreeType Project, including all source code, binaries and
documentation, unless otherwise stated in the file in its
original, unmodified form as distributed in the original archive.
If you are unsure whether or not a particular file is covered by
this license, you must contact us to verify this.
The FreeType Project is copyright (C) 1996-2000 by David Turner,
Robert Wilhelm, and Werner Lemberg. All rights reserved except as
specified below.
1. No Warranty
--------------
THE FREETYPE PROJECT IS PROVIDED `AS IS' WITHOUT WARRANTY OF ANY
KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. IN NO EVENT WILL ANY OF THE AUTHORS OR COPYRIGHT HOLDERS
BE LIABLE FOR ANY DAMAGES CAUSED BY THE USE OR THE INABILITY TO
USE, OF THE FREETYPE PROJECT.
2. Redistribution
-----------------
This license grants a worldwide, royalty-free, perpetual and
irrevocable right and license to use, execute, perform, compile,
display, copy, create derivative works of, distribute and
sublicense the FreeType Project (in both source and object code
forms) and derivative works thereof for any purpose; and to
authorize others to exercise some or all of the rights granted
herein, subject to the following conditions:
o Redistribution of source code must retain this license file
(`FTL.TXT') unaltered; any additions, deletions or changes to
the original files must be clearly indicated in accompanying
documentation. The copyright notices of the unaltered,
original files must be preserved in all copies of source
files.
o Redistribution in binary form must provide a disclaimer that
states that the software is based in part of the work of the
FreeType Team, in the distribution documentation. We also
encourage you to put an URL to the FreeType web page in your
documentation, though this isn't mandatory.
These conditions apply to any software derived from or based on
the FreeType Project, not just the unmodified files. If you use
our work, you must acknowledge us. However, no fee need be paid
to us.
3. Advertising
--------------
Neither the FreeType authors and contributors nor you shall use
the name of the other for commercial, advertising, or promotional
purposes without specific prior written permission.
We suggest, but do not require, that you use one or more of the
following phrases to refer to this software in your documentation
or advertising materials: `FreeType Project', `FreeType Engine',
`FreeType library', or `FreeType Distribution'.
As you have not signed this license, you are not required to
accept it. However, as the FreeType Project is copyrighted
material, only this license, or another one contracted with the
authors, grants you the right to use, distribute, and modify it.
Therefore, by using, distributing, or modifying the FreeType
Project, you indicate that you understand and accept all the terms
of this license.
4. Contacts
-----------
There are two mailing lists related to FreeType:
o freetype@nongnu.org
Discusses general use and applications of FreeType, as well as
future and wanted additions to the library and distribution.
If you are looking for support, start in this list if you
haven't found anything to help you in the documentation.
o freetype-devel@nongnu.org
Discusses bugs, as well as engine internals, design issues,
specific licenses, porting, etc.
Our home page can be found at
http://www.freetype.org
--- end of FTL.TXT ---
libs/freetype-2.8.1/docs/GPLv2.TXT
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Software Foundation, write to the Free Software Foundation; we sometimes
make exceptions for this. Our decision will be guided by the two goals
of preserving the free status of all derivatives of our free software and
of promoting the sharing and reuse of software generally.
NO WARRANTY
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
REPAIR OR CORRECTION.
12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
convey the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
when it starts in an interactive mode:
Gnomovision version 69, Copyright (C) year name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, the commands you use may
be called something other than `show w' and `show c'; they could even be
mouse-clicks or menu items--whatever suits your program.
You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Library General
Public License instead of this License.
libs/freetype-2.8.1/docs/INSTALL
+90
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There are several ways to build the FreeType library, depending on
your system and the level of customization you need. Here is a short
overview of the documentation available:
I. Normal installation and upgrades
===================================
1. Unix Systems (including Mac OS X, Cygwin, and MSys on Windows)
Please read `INSTALL.UNIX' to install or upgrade FreeType 2 on a
Unix system. Note that you *need* GNU Make for automatic
compilation, since other make tools won't work (this includes BSD
Make).
GNU Make VERSION 3.80 OR NEWER IS NEEDED!
[For `cmake' see below.]
2. On VMS with the `mms' build tool
See `INSTALL.VMS' for installation instructions on this platform.
3. Other systems using GNU Make
On non-Unix platforms, it is possible to build the library using
GNU Make utility. Note that *NO OTHER MAKE TOOL WILL WORK*[1]!
This methods supports several compilers on Windows, OS/2, and
BeOS, including MinGW, Visual C++, Borland C++, and more.
Instructions are provided in the file `INSTALL.GNU'.
4. With an IDE Project File (e.g., for Visual Studio or CodeWarrior)
We provide a small number of `project files' for various IDEs to
automatically build the library as well. Note that these files
are not supported and only sporadically maintained by FreeType
developers, so don't expect them to work in each release.
To find them, have a look at the content of the `builds/<system>'
directory, where <system> stands for your OS or environment.
5. Using cmake
See the top-level `CMakeLists.txt' file for more information.
6. From you own IDE, or own Makefiles
If you want to create your own project file, follow the
instructions given in the `INSTALL.ANY' document of this
directory.
II. Custom builds of the library
================================
Customizing the compilation of FreeType is easy, and allows you to
select only the components of the font engine that you really need.
For more details read the file `CUSTOMIZE'.
----------------------------------------------------------------------
[1] make++, a make tool written in Perl, has sufficient support of GNU
make extensions to build FreeType. See
http://makepp.sourceforge.net
for more information; you need version 1.19 or newer, and you must
pass option `--norc-substitution'.
----------------------------------------------------------------------
Copyright 2000-2017 by
David Turner, Robert Wilhelm, and Werner Lemberg.
This file is part of the FreeType project, and may only be used,
modified, and distributed under the terms of the FreeType project
license, LICENSE.TXT. By continuing to use, modify, or distribute
this file you indicate that you have read the license and understand
and accept it fully.
--- end of INSTALL ---
libs/freetype-2.8.1/docs/INSTALL.ANY
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Instructions on how to build FreeType with your own build tool
==============================================================
See the file `CUSTOMIZE' to learn how to customize FreeType to
specific environments.
I. Standard procedure
---------------------
* DISABLE PRE-COMPILED HEADERS! This is very important for Visual
C++, because FreeType uses lines like:
#include FT_FREETYPE_H
which are not correctly supported by this compiler while being ISO
C compliant!
* You need to add the directory `include' to your include path when
compiling the library.
* FreeType 2 is made of several components; each of them is located
in a subdirectory of `freetype2/src'. For example,
`freetype2/src/truetype/' contains the TrueType font driver.
* DO NOT COMPILE ALL C FILES! Rather, compile the following ones.
-- base components (required)
src/base/ftsystem.c
src/base/ftinit.c
src/base/ftdebug.c
src/base/ftbase.c
src/base/ftbbox.c -- recommended, see <ftbbox.h>
src/base/ftglyph.c -- recommended, see <ftglyph.h>
src/base/ftbdf.c -- optional, see <ftbdf.h>
src/base/ftbitmap.c -- optional, see <ftbitmap.h>
src/base/ftcid.c -- optional, see <ftcid.h>
src/base/ftfntfmt.c -- optional, see <ftfntfmt.h>
src/base/ftfstype.c -- optional
src/base/ftgasp.c -- optional, see <ftgasp.h>
src/base/ftgxval.c -- optional, see <ftgxval.h>
src/base/ftlcdfil.c -- optional, see <ftlcdfil.h>
src/base/ftmm.c -- optional, see <ftmm.h>
src/base/ftotval.c -- optional, see <ftotval.h>
src/base/ftpatent.c -- optional
src/base/ftpfr.c -- optional, see <ftpfr.h>
src/base/ftstroke.c -- optional, see <ftstroke.h>
src/base/ftsynth.c -- optional, see <ftsynth.h>
src/base/fttype1.c -- optional, see <t1tables.h>
src/base/ftwinfnt.c -- optional, see <ftwinfnt.h>
src/base/ftmac.c -- only on the Macintosh
-- font drivers (optional; at least one is needed)
src/bdf/bdf.c -- BDF font driver
src/cff/cff.c -- CFF/OpenType font driver
src/cid/type1cid.c -- Type 1 CID-keyed font driver
src/pcf/pcf.c -- PCF font driver
src/pfr/pfr.c -- PFR/TrueDoc font driver
src/sfnt/sfnt.c -- SFNT files support
(TrueType & OpenType)
src/truetype/truetype.c -- TrueType font driver
src/type1/type1.c -- Type 1 font driver
src/type42/type42.c -- Type 42 font driver
src/winfonts/winfnt.c -- Windows FONT / FNT font driver
-- rasterizers (optional; at least one is needed for vector
formats)
src/raster/raster.c -- monochrome rasterizer
src/smooth/smooth.c -- anti-aliasing rasterizer
-- auxiliary modules (optional)
src/autofit/autofit.c -- auto hinting module
src/cache/ftcache.c -- cache sub-system (in beta)
src/gzip/ftgzip.c -- support for compressed fonts (.gz)
src/lzw/ftlzw.c -- support for compressed fonts (.Z)
src/bzip2/ftbzip2.c -- support for compressed fonts (.bz2)
src/gxvalid/gxvalid.c -- TrueTypeGX/AAT table validation
src/otvalid/otvalid.c -- OpenType table validation
src/psaux/psaux.c -- PostScript Type 1 parsing
src/pshinter/pshinter.c -- PS hinting module
src/psnames/psnames.c -- PostScript glyph names support
Notes:
`ftcache.c' needs `ftglyph.c'
`ftfstype.c' needs `fttype1.c'
`ftglyph.c' needs `ftbitmap.c'
`ftstroke.c' needs `ftglyph.c'
`ftsynth.c' needs `ftbitmap.c'
`cff.c' needs `sfnt.c', `pshinter.c', and `psnames.c'
`truetype.c' needs `sfnt.c' and `psnames.c'
`type1.c' needs `psaux.c' `pshinter.c', and `psnames.c'
`type1cid.c' needs `psaux.c', `pshinter.c', and `psnames.c'
`type42.c' needs `truetype.c'
Please consult the central `include/freetype/config/ftoption.h'
configuration file for details on additional libraries necessary
for some optional features.
Read the file `CUSTOMIZE' in case you want to compile only a subset
of the drivers, renderers, and optional modules; a detailed
description of the various base extension is given in the top-level
file `modules.cfg'.
You are done. In case of problems, see the archives of the FreeType
development mailing list.
II. Support for flat-directory compilation
------------------------------------------
It is possible to put all FreeType 2 source files into a single
directory, with the *exception* of the `include' hierarchy.
1. Copy all files in current directory
cp freetype2/src/base/*.[hc] .
cp freetype2/src/raster1/*.[hc] .
cp freetype2/src/smooth/*.[hc] .
etc.
2. Compile sources
cc -c -Iinclude -DFT2_BUILD_LIBRARY ftsystem.c
cc -c -Iinclude -DFT2_BUILD_LIBRARY ftinit.c
cc -c -Iinclude -DFT2_BUILD_LIBRARY ftdebug.c
cc -c -Iinclude -DFT2_BUILD_LIBRARY ftbase.c
etc.
You don't need to define the FT_FLAT_COMPILATION macro (as this
was required in previous releases of FreeType 2).
----------------------------------------------------------------------
Copyright 2003-2017 by
David Turner, Robert Wilhelm, and Werner Lemberg.
This file is part of the FreeType project, and may only be used,
modified, and distributed under the terms of the FreeType project
license, LICENSE.TXT. By continuing to use, modify, or distribute
this file you indicate that you have read the license and understand
and accept it fully.
--- end of INSTALL.ANY ---
libs/freetype-2.8.1/docs/INSTALL.CROSS
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This document contains instructions on how to cross-build the FreeType
library on Unix systems, for example, building binaries for Linux/MIPS
on FreeBSD/i386. Before reading this document, please consult the
file `INSTALL.UNIX' for required tools and the basic self-building
procedure.
1. Required Tools
-----------------
For self-building the FreeType library on a Unix system, GNU Make
3.80 or newer is required. `INSTALL.UNIX' contains hints how to
check the installed `make'.
The GNU C compiler to cross-build the target system is required.
Currently, using a non-GNU cross compiler is untested. The cross
compiler is expected to be installed with a system prefix. For
example, if your building system is FreeBSD/i386 and the target
system is Linux/MIPS, the cross compiler should be installed with
the name `mips-ip22-linuxelf-gcc'.
A C compiler for a self-build is required also, to build a tool
(`apinames') that is executed during the build procedure. Non-GNU
self compilers are acceptable, but such a setup is untested.
2. Configuration
----------------
2.1. Building and target system
To configure a cross-build, the options `--host=<system>' and
`--build=<system>' must be passed to the `configure' script.
For example, if your build system is FreeBSD/i386 and the target
system is Linux/MIPS, say
./configure \
--build=i386-unknown-freebsd \
--host=mips-ip22-linuxelf \
[other options]
It should be noted that `--host=<system>' specifies the system
where the built binaries will be executed, not the system where
the build actually happens. Older versions of GNU autoconf use
the option pair `--host=' and `--target='. This is broken and
doesn't work. Similarly, an explicit CC specification like
env CC=mips-ip22-linux-gcc ./configure # BAD
or
env CC=/usr/local/mips-ip22-linux/bin/gcc ./configure # BAD
doesn't work either; such a configuration confuses the
`configure' script while trying to find the cross and native C
compilers.
2.2. The prefix to install FreeType2
Setting `--prefix=<prefix>' properly is important. The prefix
to install FreeType2 is written into the `freetype-config'
script and `freetype2.pc' configuration file.
If the built FreeType 2 library is used as a part of the
cross-building system, the prefix is expected to be different
from the self-building system. For example, a configuration
with `--prefix=/usr/local' installs binaries into the
system-wide `/usr/local' directory, which then can't be executed
due to the incorrect architecture. This causes confusion in
configuration of all applications that use FreeType2. Instead,
use a prefix to install the cross-build into a separate system
tree, for example, `--prefix=/usr/local/mips-ip22-linux/'.
On the other hand, if the built FreeType 2 library is used as a
part of the target system, the prefix to install should reflect
the file system structure of the target system.
2.3. Library dependencies
FreeType normally depends on external libraries like `libpng' or
`libharfbuzz'. The easiest case is to deactivate all such
dependencies using the `--without-XXX' configuration options.
However, if you want to use those libraries, you should ensure
that they are available both on the target system and as
(cross-compiled) libraries on the build system.
FreeType uses `pkg-config' to find most of the libraries; the
other libraries it links to are expected in the standard system
directories. Since the default pkg-config's meta-information
files (like `harfbuzz.pc') of the build platform don't work, use
one of the two possible solutions below.
o Use pkg-config's meta-information files that are adjusted to
cross-compile and cross-link with the target platform's
libraries. Make sure those files are found before the build
system's default files. Example:
./configure \
--build=i386-unknown-freebsd \
--host=mips-ip22-linuxelf \
PKG_CONFIG_LIBDIR="/usr/local/mips-ip22-linux/lib/pkgconfig" \
[other options]
See the manpage of `pkg-config' for more details.
o Set variables like LIBPNG_LIBS as additional options to the
`configure' script, overriding the values `pkg-config' would
provide. `configure --help' shows the available environment
variables. Example:
./configure \
--build=i386-unknown-freebsd \
--host=mips-ip22-linuxelf \
LIBPNG_CFLAGS="-I/usr/local/mips-ip22-linux/include" \
LIBPNG_LIBS="-L/usr/local/mips-ip22-linux/lib -lpng12" \
[other options]
3. Building command
-------------------
If the configuration finishes successfully, invoking GNU make
builds FreeType2. Just say
make
or
gmake
depending on the name the GNU make binary actually has.
4. Installation
---------------
Saying
make install
as usual to install FreeType2 into the directory tree specified by
the argument of the `--prefix' option.
As noted in section 2.2, FreeType2 is sometimes configured to be
installed into the system directory of the target system, and
should not be installed in the cross-building system. In such
cases, the make variable `DESTDIR' is useful to change the root
directory in the installation. For example, after
make DESTDIR=/mnt/target_system_root/ install
the built FreeType2 library files are installed into the directory
`/mnt/target_system_root/<prefix_in_configure>/lib'.
5. TODO
-------
Cross building between Cygwin (or MSys) and Unix must be tested.
----------------------------------------------------------------------
Copyright 2006-2017 by
suzuki toshiya, David Turner, Robert Wilhelm, and Werner Lemberg.
This file is part of the FreeType project, and may only be used,
modified, and distributed under the terms of the FreeType project
license, LICENSE.TXT. By continuing to use, modify, or distribute
this file you indicate that you have read the license and understand
and accept it fully.
--- end of INSTALL.CROSS ---
libs/freetype-2.8.1/docs/INSTALL.GNU
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This document contains instructions how to build the FreeType library
on non-Unix systems with the help of GNU Make. Note that if you are
running Cygwin or MinGW/MSYS in Windows, you should follow the
instructions in the file `INSTALL.UNIX' instead.
FreeType 2 includes a powerful and flexible build system that allows
you to easily compile it on a great variety of platforms from the
command line. To do so, just follow these simple instructions.
1. Install GNU Make
-------------------
Because GNU Make is the only Make tool supported to compile
FreeType 2, you should install it on your machine.
The FreeType 2 build system relies on many features special to GNU
Make.
NEARLY ALL OTHER MAKE TOOLS FAIL, INCLUDING `BSD MAKE', SO REALLY
INSTALL A RECENT VERSION OF GNU MAKE ON YOUR SYSTEM!
Note that make++, a make tool written in Perl, supports enough
features of GNU make to compile FreeType. See
http://makepp.sourceforge.net
for more information; you need version 1.19 or newer, and you must
pass option `--norc-substitution'.
Make sure that you are invoking GNU Make from the command line, by
typing something like:
make -v
to display its version number.
VERSION 3.80 OR NEWER IS NEEDED!
2. Invoke `make'
----------------
Go to the root directory of FreeType 2, then simply invoke GNU
Make from the command line. This will launch the FreeType 2 host
platform detection routines. A summary will be displayed, for
example, on Win32.
==============================================================
FreeType build system -- automatic system detection
The following settings are used:
platform windows
compiler gcc
configuration directory .\builds\windows
configuration rules .\builds\windows\w32-gcc.mk
If this does not correspond to your system or settings please
remove the file 'config.mk' from this directory then read the
INSTALL file for help.
Otherwise, simply type 'make' again to build the library
or 'make refdoc' to build the API reference (the latter needs
python).
=============================================================
If the detected settings correspond to your platform and compiler,
skip to step 5. Note that if your platform is completely alien to
the build system, the detected platform will be `ansi'.
3. Configure the build system for a different compiler
------------------------------------------------------
If the build system correctly detected your platform, but you want
to use a different compiler than the one specified in the summary
(for most platforms, gcc is the default compiler), invoke GNU Make
with
make setup <compiler>
Examples:
to use Visual C++ on Win32, type: `make setup visualc'
to use Borland C++ on Win32, type `make setup bcc32'
to use Watcom C++ on Win32, type `make setup watcom'
to use Intel C++ on Win32, type `make setup intelc'
to use LCC-Win32 on Win32, type: `make setup lcc'
to use Watcom C++ on OS/2, type `make setup watcom'
to use VisualAge C++ on OS/2, type `make setup visualage'
The <compiler> name to use is platform-dependent. The list of
available compilers for your system is available in the file
`builds/<system>/detect.mk'.
If you are satisfied by the new configuration summary, skip to
step 5.
4. Configure the build system for an unknown platform/compiler
--------------------------------------------------------------
The auto-detection/setup phase of the build system copies a file
to the current directory under the name `config.mk'.
For example, on OS/2+gcc, it would simply copy
`builds/os2/os2-gcc.mk' to `./config.mk'.
If for some reason your platform isn't correctly detected, copy
manually the configuration sub-makefile to `./config.mk' and go to
step 5.
Note that this file is a sub-Makefile used to specify Make
variables for compiler and linker invocation during the build.
You can easily create your own version from one of the existing
configuration files, then copy it to the current directory under
the name `./config.mk'.
5. Build the library
--------------------
The auto-detection/setup phase should have copied a file in the
current directory, called `./config.mk'. This file contains
definitions of various Make variables used to invoke the compiler
and linker during the build. [It has also generated a file called
`ftmodule.h' in the objects directory (which is normally
`<toplevel>/objs/'); please read the file `docs/CUSTOMIZE' for
customization of FreeType.]
To launch the build, simply invoke GNU Make again: The top
Makefile will detect the configuration file and run the build with
it.
Final note
The above instructions build a _statically_ linked library of the
font engine in the `objs' directory. On Windows, you can build a
DLL either with MinGW (within an MSYS shell, following the
instructions in `INSTALL.UNIX'), or you use one of the Visual C++
project files; see the subdirectories of `builds/windows'. For
everything else, you are on your own, and you might follow the
instructions in `INSTALL.ANY' to create your own Makefiles.
----------------------------------------------------------------------
Copyright 2003-2017 by
David Turner, Robert Wilhelm, and Werner Lemberg.
This file is part of the FreeType project, and may only be used,
modified, and distributed under the terms of the FreeType project
license, LICENSE.TXT. By continuing to use, modify, or distribute
this file you indicate that you have read the license and understand
and accept it fully.
--- end of INSTALL.GNU ---
libs/freetype-2.8.1/docs/INSTALL.MAC
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Please follow the instructions in INSTALL.UNIX to install FreeType on
Mac OS X.
Currently FreeType2 functions based on some deprecated Carbon APIs
return `FT_Err_Unimplemented_Feature' always, even if FreeType2 is
configured and built on the system that deprecated Carbon APIs are
available. To enable deprecated FreeType2 functions as far as
possible, replace `src/base/ftmac.c' by `builds/mac/ftmac.c'.
Starting with Mac OS X 10.5, gcc defaults the deployment target to
10.5. In previous versions of Mac OS X, this defaulted to 10.1. If
you want your built binaries to run only on 10.5, this change does not
concern you. If you want them to also run on older versions of Mac
OS X, then you must either set the MACOSX_DEPLOYMENT_TARGET
environment variable or pass `-mmacosx-version-min' to gcc. You
should specify the oldest version of Mac OS you want the code to run
on. For example, if you use Bourne shell:
export MACOSX_DEPLOYMENT_TARGET=10.2
or, if you use C shell:
setenv MACOSX_DEPLOYMENT_TARGET 10.2
Alternatively, you could pass `-mmacosx-version-min=10.2' to gcc.
Here the number 10.2 is the lowest version that the built binaries can
run on. In the above cases, the built binaries will run on Mac OS X
10.2 and later, but _not_ earlier. If you want to run on earlier, you
have to set lower version, e.g., 10.0.
For classic Mac OS (Mac OS 7, 8, 9) please refer to builds/mac/README.
libs/freetype-2.8.1/docs/INSTALL.UNIX
+118
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This document contains instructions on how to build the FreeType
library on Unix systems. This also works for emulations like Cygwin
or MSys on Win32:
1. Ensure that you are using GNU Make
-------------------------------------
The FreeType build system _exclusively_ works with GNU Make. You
will not be able to compile the library with the instructions
below using any other alternative (including BSD Make).
Check that you have GNU make by running the command:
make -v
This should dump some text that begins with:
GNU Make <version number>
Copyright (C) <year> Free Software Foundation Inc.
Note that version 3.80 or higher is *required* or the build will
fail.
It is also fine to have GNU Make under another name (e.g. 'gmake')
if you use the MAKE variable as described below.
As a special exception, 'makepp' can also be used to build
FreeType 2. See the file docs/MAKEPP for details.
For builds with `cmake' please check file `CMakeLists.txt'; this
is a contributed file not directly supported by the FreeType team.
2. Regenerate the configure script if needed
--------------------------------------------
This only applies if you are building a git snapshot or checkout,
*not* if you grabbed the sources of an official release.
You need to invoke the `autogen.sh' script in the top-level
directory in order to create the `configure' script for your
platform. Normally, this simply means typing:
sh autogen.sh
In case of problems, you may need to install or upgrade Automake,
Autoconf or Libtool. See README.git in the top-level directory
for more information.
3. Build and install the library
--------------------------------
The following should work on all Unix systems where the `make'
command invokes GNU Make:
./configure [options]
make
make install (as root)
The default installation path is `/usr/local'. It can be changed
with the `--prefix=<path>' option. Example:
./configure --prefix=/usr
When using a different command to invoke GNU Make, use the MAKE
variable. For example, if `gmake' is the command to use on your
system, do something like:
MAKE=gmake ./configure [options]
gmake
gmake install (as root)
If this still doesn't work, there must be a problem with your
system (e.g., you are using a very old version of GNU Make).
It is possible to compile FreeType in a different directory.
Assuming the FreeType source files in directory `/src/freetype' a
compilation in directory `foo' works as follows:
cd foo
/src/freetype/configure [options]
make
make install
3.1 Interdependency with HarfBuzz
.................................
Note that there is a chicken-and-egg problem currently since the
HarfBuzz library (used by the auto-hinter to improve support of
OpenType fonts) depends on FreeType, which can be solved as
follows in case HarfBuzz is not yet installed on your system.
1. Call FreeType's `configure' script with option
`--without-harfbuzz', then compile and install FreeType.
2. Compile and install HarfBuzz.
3. Call FreeType's `configure' script without option
`--without-harfbuzz' (after executing `make distclean'), then
compile and install FreeType again.
----------------------------------------------------------------------
Copyright 2003-2017 by
David Turner, Robert Wilhelm, and Werner Lemberg.
This file is part of the FreeType project, and may only be used,
modified, and distributed under the terms of the FreeType project
license, LICENSE.TXT. By continuing to use, modify, or distribute
this file you indicate that you have read the license and understand
and accept it fully.
--- end of INSTALL.UNIX ---
libs/freetype-2.8.1/docs/INSTALL.VMS
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How to build the FreeType 2 library on VMS
-----------------------------------------
It is actually very straightforward to install the FreeType 2 library.
Just execute vms_make.com from the toplevel directory to build the
library. This procedure currently accepts the following options:
DEBUG
Build the library with debug information and without optimization.
lopts=<value>
Options to pass to the link command e.g. lopts=/traceback
ccopt=<value>
Options to pass to the C compiler e.g. ccopt=/float=ieee
In case you did download the demos, place them in a separate directory
sharing the same top level as the directory of FreeType 2 and follow
the same instructions as above for the demos from there. The build
process relies on this to figure out the location of the FreeType 2
include files.
To rebuild the sources it is necessary to have MMS/MMK installed on
the system.
The library is available in the directory
[.LIB]
To compile applications using FreeType 2 you have to define the
logical FREETYPE pointing to the directory
[.INCLUDE.FREETYPE]
i.e., if the directory in which this INSTALL.VMS file is located is
$disk:[freetype] then define the logical with
define freetype $disk:[freetype.include.freetype]
This version has been tested with Compaq C V6.2-006 on OpenVMS Alpha
V7.2-1.
Any problems can be reported to
Jouk Jansen <joukj@hrem.stm.tudelft.nl> or
Martin P.J. Zinser <zinser@zinser.no-ip.info>
------------------------------------------------------------------------
Copyright 2000-2017 by
David Turner, Robert Wilhelm, and Werner Lemberg.
This file is part of the FreeType project, and may only be used,
modified, and distributed under the terms of the FreeType project
license, LICENSE.TXT. By continuing to use, modify, or distribute this
file you indicate that you have read the license and understand and
accept it fully.
--- end of INSTALL.VMS ---
libs/freetype-2.8.1/docs/LICENSE.TXT
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@@ -0,0 +1,39 @@
The FreeType 2 font engine is copyrighted work and cannot be used
legally without a software license. In order to make this project
usable to a vast majority of developers, we distribute it under two
mutually exclusive open-source licenses.
This means that *you* must choose *one* of the two licenses described
below, then obey all its terms and conditions when using FreeType 2 in
any of your projects or products.
- The FreeType License, found in the file `FTL.TXT', which is similar
to the original BSD license *with* an advertising clause that forces
you to explicitly cite the FreeType project in your product's
documentation. All details are in the license file. This license
is suited to products which don't use the GNU General Public
License.
Note that this license is compatible to the GNU General Public
License version 3, but not version 2.
- The GNU General Public License version 2, found in `GPLv2.TXT' (any
later version can be used also), for programs which already use the
GPL. Note that the FTL is incompatible with GPLv2 due to its
advertisement clause.
The contributed BDF and PCF drivers come with a license similar to that
of the X Window System. It is compatible to the above two licenses (see
file src/bdf/README and src/pcf/README). The same holds for the files
`fthash.c' and `fthash.h'; their code was part of the BDF driver in
earlier FreeType versions.
The gzip module uses the zlib license (see src/gzip/zlib.h) which too is
compatible to the above two licenses.
The MD5 checksum support (only used for debugging in development builds)
is in the public domain.
--- end of LICENSE.TXT ---
libs/freetype-2.8.1/docs/MAKEPP
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As a special exception, FreeType can also be built with the 'makepp'
build tool, available from http://makepp.sourceforge.net.
Note, however. that you will need at least version 1.19 and pass the
option --norc-substitution to have it work correctly.
libs/freetype-2.8.1/docs/PROBLEMS
+90
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This file describes various problems that have been encountered in
compiling, installing and running FreeType 2. Suggestions for
additions or other improvements to this file are welcome.
----------------------------------------------------------------------
Running Problems
================
* Some Type 1, Multiple Masters, and CID-keyed PostScript fonts aren't
handled correctly.
-----
Of course, there might be bugs in FreeType, but some fonts based on
the PostScript format can't be handled indeed. The reason is that
FreeType doesn't contain a full PostScript interpreter but applies
pattern matching instead. In case a font doesn't follow the standard
structure of the given font format, FreeType fails. A typical example
is Adobe's `Optima' font family which contains extra code to switch
between low and high resolution versions of the glyphs.
It might be possible to patch FreeType in some situations, though.
Please report failing fonts so that we investigate the problem and set
up a list of such problematic fonts.
* Why do identical FreeType versions render differently on different
platforms?
-----
Different distributions compile FreeType with different options. The
developer version of a distribution's FreeType package, which is
needed to compile your program against FreeType, includes the file
ftoption.h. Compare each platform's copy of ftoption.h to find the
differences.
----------------------------------------------------------------------
Compilation Problems
====================
* I get an `internal compilation error' (ICE) while compiling FreeType
2.2.1 with Intel C++.
This has been reported for the following compiler version:
Intel(R) C++ Compiler for 32-bit applications,
Version 9.0 Build 20050430Z Package ID: W_CC_P_9.0.019
-----
The best solution is to update the compiler to version
Intel(R) C++ Compiler for 32-bit applications,
Version 9.1 Build 20060323Z Package ID: W_CC_P_9.1.022
or newer. If this isn't feasible, apply the following patch.
--- src/cache/ftcbasic.c 20 Mar 2006 12:10:24 -0000 1.20
+++ src/cache/ftcbasic.c.patched 15 May 2006 02:51:02 -0000
@@ -252,7 +252,7 @@
*/
FT_CALLBACK_TABLE_DEF
- const FTC_IFamilyClassRec ftc_basic_image_family_class =
+ FTC_IFamilyClassRec ftc_basic_image_family_class =
{
{
sizeof ( FTC_BasicFamilyRec ),
@@ -266,7 +266,7 @@
FT_CALLBACK_TABLE_DEF
- const FTC_GCacheClassRec ftc_basic_image_cache_class =
+ FTC_GCacheClassRec ftc_basic_image_cache_class =
{
{
ftc_inode_new,
----------------------------------------------------------------------
--- end of PROBLEMS ---
libs/freetype-2.8.1/docs/TODO
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Here is a list of items that need to be addressed in FreeType 2
---------------------------------------------------------------
* Implement stem3/counter hints properly in the Postscript hinter.
* Add CIDCMap support to the CID driver.
* Add track kerning support to the PFR driver.
* Add kerning (AFM file) support to the CID driver.
Here is a list of bugs which should be handled
----------------------------------------------
Other bugs have been registered at the savannah bugzilla of FreeType.
* CID driver:
Handle the case where a CID font has a top-level font matrix also
(see PLRM, 5.11.3, Type 0 CIDFonts). Since CID_FaceInfoRec lacks
a font_matrix entry we have to directly apply it to all subfont
matrices.
* CID driver:
Use top-level font matrix entry for setting the upem value, not the
entries in the FDarray. If absent, use 1000.
------------------------------------------------------------------------
Copyright 2001-2017 by
David Turner, Robert Wilhelm, and Werner Lemberg.
This file is part of the FreeType project, and may only be used,
modified, and distributed under the terms of the FreeType project
license, LICENSE.TXT. By continuing to use, modify, or distribute this
file you indicate that you have read the license and understand and
accept it fully.
--- end of TODO ---
libs/freetype-2.8.1/docs/VERSIONS.TXT
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Due to our use of `libtool' to generate and install the FreeType 2
libraries on Unix systems, as well as other historical events, it is
generally very difficult to know precisely which release of the font
engine is installed on a given system.
This file tries to explain why and to document ways to properly detect
FreeType on Unix.
1. Version and Release numbers
------------------------------
For each new public release of FreeType 2, there are generally *three*
distinct `version' numbers to consider:
* The official FreeType 2 release number, like 2.3.1 or 2.4.10.
* The libtool (and Unix) specific version number, like 13.0.7. This
is what `freetype-config --version' returns.
* The platform-specific shared object number, used for example when
the library is installed as `/usr/lib/libfreetype.so.6.7.1'.
The platform-specific number is, unsurprisingly, platform-specific and
varies with the operating system you are using (several variants of
Linux, FreeBSD, Solaris, etc.). You should thus _never_ use it, even
for simple tests.
The libtool-specific number does not equal the release number but is
tied to it.
The release number is available at *compile* time through the following
macros defined in FT_FREETYPE_H:
- FREETYPE_MAJOR: major release number
- FREETYPE_MINOR: minor release number
- FREETYPE_PATCH: patch release number
See below for a small autoconf fragment.
The release number is also available at *runtime* through the
`FT_Library_Version' API.
2. History
----------
The following table gives, for all releases since 2.4.0, the
corresponding libtool number, as well as the shared object number found
on _most_ systems, but not all of them:
release libtool so
-------------------------------
2.8.1 21.0.15 6.15.0
2.8.0 20.0.14 6.14.0
2.7.1 19.0.13 6.13.0
2.7.0 18.6.12 6.12.6
2.6.5 18.5.12 6.12.5
2.6.4 18.4.12 6.12.4
2.6.3 18.3.12 6.12.3
2.6.2 18.2.12 6.12.2
2.6.1 18.1.12 6.12.1
2.6.0 18.0.12 6.12.0
2.5.5 17.4.11 6.11.4
2.5.4 17.3.11 6.11.3
2.5.3 17.2.11 6.11.2
2.5.2 17.1.11 6.11.1
2.5.1 17.0.11 6.11.0
2.5.0 16.2.10 6.10.2
2.4.12 16.1.10 6.10.1
2.4.11 16.0.10 6.10.0
2.4.10 15.0.9 6.9.0
2.4.9 14.1.8 6.8.1
2.4.8 14.0.8 6.8.0
2.4.7 13.2.7 6.7.2
2.4.6 13.1.7 6.7.1
2.4.5 13.0.7 6.7.0
2.4.4 12.2.6 6.6.2
2.4.3 12.1.6 6.6.1
2.4.2 12.0.6 6.6.0
2.4.1 11.1.5 6.5.1
2.4.0 11.0.5 6.5.0
3. Autoconf Code Fragment
-------------------------
Lars Clausen contributed the following autoconf fragment to detect which
version of FreeType is installed on a system. This one tests for a
version that is at least 2.0.9; you should change it to check against
other release numbers.
AC_MSG_CHECKING([whether FreeType version is 2.0.9 or higher])
old_CPPFLAGS="$CPPFLAGS"
CPPFLAGS=`freetype-config --cflags`
AC_TRY_CPP([
#include <ft2build.h>
#include FT_FREETYPE_H
#if (FREETYPE_MAJOR*1000 + FREETYPE_MINOR)*1000 + FREETYPE_PATCH < 2000009
#error FreeType version too low.
#endif
],
[AC_MSG_RESULT(yes)
FREETYPE_LIBS=`freetype-config --libs`
AC_SUBST(FREETYPE_LIBS)
AC_DEFINE(HAVE_FREETYPE,1,[Define if you have the FreeType2 library])
CPPFLAGS="$old_CPPFLAGS"],
[AC_MSG_ERROR([Need FreeType library version 2.0.9 or higher])])
------------------------------------------------------------------------
Copyright 2002-2017 by
David Turner, Robert Wilhelm, and Werner Lemberg.
This file is part of the FreeType project, and may only be used,
modified, and distributed under the terms of the FreeType project
license, LICENSE.TXT. By continuing to use, modify, or distribute this
file you indicate that you have read the license and understand and
accept it fully.
--- end of VERSIONS.TXT ---
libs/freetype-2.8.1/docs/formats.txt
+209
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This file contains a list of various font formats. It gives the
reference document and whether it is supported in FreeType 2.
Table fields
------------
wrapper format
The format used to represent the font data. In the table below it
is used only if the font format differs. Possible values are
SFNT binary
PFB binary
PS a text header, followed by binary or text data
LZW compressed with either `gzip' or `compress'
BZ2 compressed with `bzip2'.
font format
How the font is to be accessed, possibly after converting the file
type and wrapper format into a generic form. Bitmap formats are
`BDF', `PCF', and one form of `WINFNT'; all others are vector
formats. `PS' indicates third-order, `TT' second-order Bézier
curves.
font type
Sub-formats of the font format. `SBIT' and `MACSBIT' are bitmap
formats, `MM' and `VAR' support optical axes. `CFF2' supports
optical axes also.
glyph access
If not specified, the glyph access is `standard' to the font
format. Values are `CID' for CID-keyed fonts, `SYNTHETIC' for
fonts that are modified versions of other fonts by means of a
transformation matrix, and `TYPE_0' for PS fonts which are to be
accessed in a tree-like structure.
FreeType driver
The module in the FreeType library which handles the specific font
format. A missing entry means that FreeType doesn't support the
font format (yet).
Notes
-----
The SFNT container format also provides `collections' (usually
having the file extension `.ttc' or `.otc'). A collection contains
multiple font faces that share some tables to avoid redundancy, thus
reducing the file size. In FreeType, elements of a collection can
be accessed with a proper face index.
Both the GX and the OpenType 1.8 variation fonts provide `named
instances'. FreeType maps them to face indices (they can also be
accessed with the standard MM interface).
Other font formats (not using the SFNT wrapper) also provide
multiple faces within one file; they are marked with an asterisk
(`*') in the table below.
FreeType can be configured to support Mac files (on older Mac OS
versions, a `file' is stored as a data and a resource fork, this is,
within two separate data chunks). If a file can't be opened as a
font, FreeType then checks whether it is a resource fork, trying to
extract the contained font data from either a `POST' or `sfnt'
resource.
Please send additions and/or corrections to wl@gnu.org or to the
FreeType developer's list at freetype-devel@nongnu.org (for
subscribers only). If you can provide a font example for a format
which isn't supported yet please send a mail too.
wrapper font font glyph FreeType reference
format format type access driver documents
-----------------------------------------------------------------------------
--- BDF --- --- bdf 5005.BDF_Spec.pdf, X11
SFNT PS TYPE_1 --- type1 Type 1 GX Font Format
(for the Mac) [3]
SFNT PS TYPE_1 CID cid 5180.sfnt.pdf (for the Mac)
[3]
SFNT PS CFF --- cff OT spec, 5176.CFF.pdf
(`OTTO' format)
SFNT PS CFF CID cff OT spec, 5176.CFF.pdf
SFNT PS CFF SYNTHETIC --- OT spec, 5176.CFF.pdf
SFNT PS CFF2 --- cff OT spec 1.8
SFNT TT SBIT --- sfnt XFree86 (bitmaps only;
with `head' table)
SFNT TT MACSBIT --- sfnt OT spec (for the Mac;
bitmaps only; `bhed' table)
SFNT TT --- --- truetype OT spec (`normal' TT font)
SFNT TT VAR --- truetype GX spec (`?var' tables)
SFNT TT VAR --- truetype OT spec 1.8
(`?var' + `?VAR' tables)
--- PS TYPE_1 --- type1 T1_SPEC.pdf
(PFA, Type 1 font resource)
PFB PS TYPE_1 --- type1 T1_SPEC.pdf,
5040.Download_Fonts.pdf
(`normal' Type 1 font)
--- PS TYPE_1 CID cid PLRM.pdf (CID Font Type 0;
Type 9 font)
--- PS MM --- type1 5015.Type1_Supp.pdf
(Multiple Masters)
--- PS CFF --- cff 5176.CFF.pdf (`pure' CFF)
--- PS* CFF CID cff 5176.CFF.pdf (`pure' CFF)
--- PS CFF SYNTHETIC --- 5176.CFF.pdf (`pure' CFF)
--- PS CFF/MM --- cff old 5167.CFF.pdf (`pure' CFF)
[3]
--- PS* CFF/MM CID cff old 5167.CFF.pdf (`pure' CFF)
[3]
--- PS CFF/MM SYNTHETIC --- old 5167.CFF.pdf (`pure' CFF)
[3]
PS PS CFF --- --- PLRM.pdf (Type 2) [1]
PS PS* CFF CID --- PLRM.pdf (Type 2) [1]
PS PS CFF SYNTHETIC --- PLRM.pdf (Type 2) [1]
PS PS CFF/MM --- --- PLRM.pdf (Type 2) [1]
PS PS* CFF/MM CID --- PLRM.pdf (Type 2) [1]
PS PS CFF/MM SYNTHETIC --- PLRM.pdf (Type 2) [1]
--- PS --- TYPE_0 --- PLRM.pdf
--- PS TYPE_3 --- --- PLRM.pdf (never supported)
--- PS TYPE_3 CID --- PLRM.pdf (CID Font Type 1;
Type 10 font; never supported)
PS PS TYPE_14 --- --- PLRM.pdf (Chameleon font;
Type 14 font; never supported?)
--- PS TYPE_32 CID --- PLRM.pdf (CID Font Type 4;
Type 32 font; never supported?)
PS TT --- --- type42 5012.Type42_Spec.pdf
(Type 42 font)
PS TT --- CID --- PLRM.pdf (CID Font Type 2;
Type 11 font)
? ? CEF ? cff ?
--- PCF --- --- pcf X11 [4]
LZW PCF --- --- pcf X11 [4]
BZ2 PCF --- --- pcf X11 [4]
--- PFR* PFR0 --- pfr [2]
--- PFR PFR1 --- --- (undocumented, proprietary;
probably never supported)
--- WINFNT* --- --- winfonts Windows developer's notes [5]
--- WINFNT VECTOR --- --- Windows developer's notes [5]
[1] Support should be rather simple since this is identical to `CFF'
but in a PS wrapper.
[2] Official PFR specification:
http://www.bitstream.com/categories/developer/truedoc/pfrspec.html
http://www.bitstream.com/categories/developer/truedoc/pfrspec1.2.pdf
The syntax of the auxiliary data is not defined there, but is
partially defined in MHP 1.0.3 (also called ETSI TS 101812 V1.3.1)
section 7.4.
http://www.etsi.org/
http://webapp.etsi.org/workprogram/Report_WorkItem.asp?WKI_ID=18799
(free registration required).
[3] Support is rudimentary currently; some tables or data are not
loaded yet.
[4] See
THE X WINDOW SYSTEM SERVER: X VERSION 11, RELEASE 5
Elias Israel, Erik Fortune, Digital Press, 1992
ISBN 1-55558-096-3
for a specification given in Appendix D on pgs. 436-450. However,
this information might be out of date; unfortunately, there is no
PCF specification available online, and this book is out of print.
George Williams deduced the font format from the X11 sources and
documented it for his FontForge font editor:
http://fontforge.github.io/pcf-format.html
[5] This is from MS Windows 3; see Microsoft's Knowledge Base article at
http://support.microsoft.com/kb/65123
------------------------------------------------------------------------
Copyright 2004-2017 by
David Turner, Robert Wilhelm, and Werner Lemberg.
This file is part of the FreeType project, and may only be used,
modified, and distributed under the terms of the FreeType project
license, LICENSE.TXT. By continuing to use, modify, or distribute this
file you indicate that you have read the license and understand and
accept it fully.
--- end of formats.txt ---
Local Variables:
coding: utf-8
End:
libs/freetype-2.8.1/docs/freetype-config.1
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.TH FREETYPE-CONFIG 1 "September 2017" "FreeType 2.8.1"
.
.
.SH NAME
.
freetype-config \- Get information about a libfreetype installation
.
.
.SH SYNOPSIS
.
.B freetype-config
.RI [ options ]
.
.
.SH DESCRIPTION
.
.B freetype-config
returns information needed for compiling and linking programs with the
FreeType library, such as linker flags and compilation parameters.
.
Alternatively, it can be used to query information about the
FreeType library version installed on the system, such as the
installation (directory path) prefix or the FreeType version number.
.
.PP
If
.BR pkg-config (1)
is found in the path,
.B freetype-config
acts as a wrapper for
.BR pkg-config .
.
.PP
This program is part of the FreeType package.
.
.
.SH OPTIONS
.
There are two types of options: output/display selection options, and
path override options.
.
.
.SS Output selection options
.
Only one of the output selection options should be given at each program
invocation.
.
.TP
.B \-\-prefix
Return the prefix value of the installed FreeType library (the default
prefix will be `/usr' in most cases for distribution-installed
packages).
.
.TP
.B \-\-exec-prefix
Return the executable prefix value of the installed FreeType library
(will often be the same as the prefix value).
.
.TP
.B \-\-ftversion
Return the FreeType version number, directly derived from file
`freetype.h'.
.
.TP
.B \-\-version
Return the `libtool version' of the FreeType library.
.
.TP
.B \-\-libtool
Return the library name for linking with libtool.
.
.TP
.B \-\-libs
Return compiler flags for linking with the installed FreeType library.
.
.TP
.B \-\-cflags
Return compiler flags for compiling against the installed FreeType library.
.
.TP
.B \-\-static
Make command line options display flags for static linking.
.
.TP
.B \-\-help
Show help and exit.
.
.
.SS Path override options
.
These affect any selected output option, except the libtool version
returned by
.BR \-\-version .
.
.TP
.BI \-\-prefix= PREFIX
Override
.B \-\-prefix
value with
.IR PREFIX .
.
This also sets
.BI \-\-exec-prefix= PREFIX
if option
.B \-\-exec-prefix
is not explicitly given.
.
.TP
.BI \-\-exec-prefix= EPREFIX
Override
.B \-\-exec-prefix
value with
.IR EPREFIX .
.
.
.SH BUGS
In case the libraries FreeType links to are located in non-standard
directories, and
.BR pkg-config (1)
is not available, the output from option
.B \-\-libs
might be incomplete.
.
It is thus recommended to use the
.BR pkg-config (1)
interface instead, which is able to correctly resolve all dependencies.
.
.PP
Setting
.B \-\-exec-prefix
(either explicitly or implicitly) might return incorrect results if
combined with option
.BR \-\-static .
.
The same problem can occur if you set the
.B SYSROOT
environment variable.
.
.
.SH AUTHOR
.
This manual page was contributed by Nis Martensen <nis.martensen@web.de>,
with further refinements from the FreeType team.
.
.
.\" eof
libs/freetype-2.8.1/docs/raster.txt
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How FreeType's rasterizer work
by David Turner
Revised 2007-Feb-01
This file is an attempt to explain the internals of the FreeType
rasterizer. The rasterizer is of quite general purpose and could
easily be integrated into other programs.
I. Introduction
II. Rendering Technology
1. Requirements
2. Profiles and Spans
a. Sweeping the Shape
b. Decomposing Outlines into Profiles
c. The Render Pool
d. Computing Profiles Extents
e. Computing Profiles Coordinates
f. Sweeping and Sorting the Spans
I. Introduction
===============
A rasterizer is a library in charge of converting a vectorial
representation of a shape into a bitmap. The FreeType rasterizer
has been originally developed to render the glyphs found in
TrueType files, made up of segments and second-order Béziers.
Meanwhile it has been extended to render third-order Bézier curves
also. This document is an explanation of its design and
implementation.
While these explanations start from the basics, a knowledge of
common rasterization techniques is assumed.
II. Rendering Technology
========================
1. Requirements
---------------
We assume that all scaling, rotating, hinting, etc., has been
already done. The glyph is thus described by a list of points in
the device space.
- All point coordinates are in the 26.6 fixed float format. The
used orientation is:
^ y
| reference orientation
|
*----> x
0
`26.6' means that 26 bits are used for the integer part of a
value and 6 bits are used for the fractional part.
Consequently, the `distance' between two neighbouring pixels is
64 `units' (1 unit = 1/64th of a pixel).
Note that, for the rasterizer, pixel centers are located at
integer coordinates. The TrueType bytecode interpreter,
however, assumes that the lower left edge of a pixel (which is
taken to be a square with a length of 1 unit) has integer
coordinates.
^ y ^ y
| |
| (1,1) | (0.5,0.5)
+-----------+ +-----+-----+
| | | | |
| | | | |
| | | o-----+-----> x
| | | (0,0) |
| | | |
o-----------+-----> x +-----------+
(0,0) (-0.5,-0.5)
TrueType bytecode interpreter FreeType rasterizer
A pixel line in the target bitmap is called a `scanline'.
- A glyph is usually made of several contours, also called
`outlines'. A contour is simply a closed curve that delimits an
outer or inner region of the glyph. It is described by a series
of successive points of the points table.
Each point of the glyph has an associated flag that indicates
whether it is `on' or `off' the curve. Two successive `on'
points indicate a line segment joining the two points.
One `off' point amidst two `on' points indicates a second-degree
(conic) Bézier parametric arc, defined by these three points
(the `off' point being the control point, and the `on' ones the
start and end points). Similarly, a third-degree (cubic) Bézier
curve is described by four points (two `off' control points
between two `on' points).
Finally, for second-order curves only, two successive `off'
points forces the rasterizer to create, during rendering, an
`on' point amidst them, at their exact middle. This greatly
facilitates the definition of successive Bézier arcs.
The parametric form of a second-order Bézier curve is:
P(t) = (1-t)^2*P1 + 2*t*(1-t)*P2 + t^2*P3
(P1 and P3 are the end points, P2 the control point.)
The parametric form of a third-order Bézier curve is:
P(t) = (1-t)^3*P1 + 3*t*(1-t)^2*P2 + 3*t^2*(1-t)*P3 + t^3*P4
(P1 and P4 are the end points, P2 and P3 the control points.)
For both formulae, t is a real number in the range [0..1].
Note that the rasterizer does not use these formulae directly.
They exhibit, however, one very useful property of Bézier arcs:
Each point of the curve is a weighted average of the control
points.
As all weights are positive and always sum up to 1, whatever the
value of t, each arc point lies within the triangle (polygon)
defined by the arc's three (four) control points.
In the following, only second-order curves are discussed since
rasterization of third-order curves is completely identical.
Here some samples for second-order curves.
* # on curve
* off curve
__---__
#-__ _-- -_
--__ _- -
--__ # \
--__ #
-#
Two `on' points
Two `on' points and one `off' point
between them
*
# __ Two `on' points with two `off'
\ - - points between them. The point
\ / \ marked `0' is the middle of the
- 0 \ `off' points, and is a `virtual
-_ _- # on' point where the curve passes.
-- It does not appear in the point
* list.
2. Profiles and Spans
---------------------
The following is a basic explanation of the _kind_ of computations
made by the rasterizer to build a bitmap from a vector
representation. Note that the actual implementation is slightly
different, due to performance tuning and other factors.
However, the following ideas remain in the same category, and are
more convenient to understand.
a. Sweeping the Shape
The best way to fill a shape is to decompose it into a number of
simple horizontal segments, then turn them on in the target
bitmap. These segments are called `spans'.
__---__
_-- -_
_- -
- \
/ \
/ \
| \
__---__ Example: filling a shape
_----------_ with spans.
_--------------
----------------\
/-----------------\ This is typically done from the top
/ \ to the bottom of the shape, in a
| | \ movement called a `sweep'.
V
__---__
_----------_
_--------------
----------------\
/-----------------\
/-------------------\
|---------------------\
In order to draw a span, the rasterizer must compute its
coordinates, which are simply the x coordinates of the shape's
contours, taken on the y scanlines.
/---/ |---| Note that there are usually
/---/ |---| several spans per scanline.
| /---/ |---|
| /---/_______|---| When rendering this shape to the
V /----------------| current scanline y, we must
/-----------------| compute the x values of the
a /----| |---| points a, b, c, and d.
- - - * * - - - - * * - - y -
/ / b c| |d
/---/ |---|
/---/ |---| And then turn on the spans a-b
/---/ |---| and c-d.
/---/_______|---|
/----------------|
/-----------------|
a /----| |---|
- - - ####### - - - - ##### - - y -
/ / b c| |d
b. Decomposing Outlines into Profiles
For each scanline during the sweep, we need the following
information:
o The number of spans on the current scanline, given by the
number of shape points intersecting the scanline (these are
the points a, b, c, and d in the above example).
o The x coordinates of these points.
x coordinates are computed before the sweep, in a phase called
`decomposition' which converts the glyph into *profiles*.
Put it simply, a `profile' is a contour's portion that can only
be either ascending or descending, i.e., it is monotonic in the
vertical direction (we also say y-monotonic). There is no such
thing as a horizontal profile, as we shall see.
Here are a few examples:
this square
1 2
---->---- is made of two
| | | |
| | profiles | |
^ v ^ + v
| | | |
| | | |
----<----
up down
this triangle
P2 1 2
|\ is made of two | \
^ | \ \ | \
| | \ \ profiles | \ |
| | \ v ^ | \ |
| \ | | + \ v
| \ | | \
P1 ---___ \ ---___ \
---_\ ---_ \
<--__ P3 up down
A more general contour can be made of more than two profiles:
__ ^
/ | / ___ / |
/ | / | / | / |
| | / / => | v / /
| | | | | | ^ |
^ | |___| | | ^ + | + | + v
| | | v | |
| | | up |
|___________| | down |
<-- up down
Successive profiles are always joined by horizontal segments
that are not part of the profiles themselves.
For the rasterizer, a profile is simply an *array* that
associates one horizontal *pixel* coordinate to each bitmap
*scanline* crossed by the contour's section containing the
profile. Note that profiles are *oriented* up or down along the
glyph's original flow orientation.
In other graphics libraries, profiles are also called `edges' or
`edgelists'.
c. The Render Pool
FreeType has been designed to be able to run well on _very_
light systems, including embedded systems with very few memory.
A render pool will be allocated once; the rasterizer uses this
pool for all its needs by managing this memory directly in it.
The algorithms that are used for profile computation make it
possible to use the pool as a simple growing heap. This means
that this memory management is actually quite easy and faster
than any kind of malloc()/free() combination.
Moreover, we'll see later that the rasterizer is able, when
dealing with profiles too large and numerous to lie all at once
in the render pool, to immediately decompose recursively the
rendering process into independent sub-tasks, each taking less
memory to be performed (see `sub-banding' below).
The render pool doesn't need to be large. A 4KByte pool is
enough for nearly all renditions, though nearly 100% slower than
a more comfortable 16KByte or 32KByte pool (that was tested with
complex glyphs at sizes over 500 pixels).
d. Computing Profiles Extents
Remember that a profile is an array, associating a _scanline_ to
the x pixel coordinate of its intersection with a contour.
Though it's not exactly how the FreeType rasterizer works, it is
convenient to think that we need a profile's height before
allocating it in the pool and computing its coordinates.
The profile's height is the number of scanlines crossed by the
y-monotonic section of a contour. We thus need to compute these
sections from the vectorial description. In order to do that,
we are obliged to compute all (local and global) y extrema of
the glyph (minima and maxima).
P2 For instance, this triangle has only
two y-extrema, which are simply
|\
| \ P2.y as a vertical maximum
| \ P3.y as a vertical minimum
| \
| \ P1.y is not a vertical extremum (though
| \ it is a horizontal minimum, which we
P1 ---___ \ don't need).
---_\
P3
Note that the extrema are expressed in pixel units, not in
scanlines. The triangle's height is certainly (P3.y-P2.y+1)
pixel units, but its profiles' heights are computed in
scanlines. The exact conversion is simple:
- min scanline = FLOOR ( min y )
- max scanline = CEILING( max y )
A problem arises with Bézier Arcs. While a segment is always
necessarily y-monotonic (i.e., flat, ascending, or descending),
which makes extrema computations easy, the ascent of an arc can
vary between its control points.
P2
*
# on curve
* off curve
__-x--_
_-- -_
P1 _- - A non y-monotonic Bézier arc.
# \
- The arc goes from P1 to P3.
\
\ P3
#
We first need to be able to easily detect non-monotonic arcs,
according to their control points. I will state here, without
proof, that the monotony condition can be expressed as:
P1.y <= P2.y <= P3.y for an ever-ascending arc
P1.y >= P2.y >= P3.y for an ever-descending arc
with the special case of
P1.y = P2.y = P3.y where the arc is said to be `flat'.
As you can see, these conditions can be very easily tested.
They are, however, extremely important, as any arc that does not
satisfy them necessarily contains an extremum.
Note also that a monotonic arc can contain an extremum too,
which is then one of its `on' points:
P1 P2
#---__ * P1P2P3 is ever-descending, but P1
-_ is an y-extremum.
-
---_ \
-> \
\ P3
#
Let's go back to our previous example:
P2
*
# on curve
* off curve
__-x--_
_-- -_
P1 _- - A non-y-monotonic Bézier arc.
# \
- Here we have
\ P2.y >= P1.y &&
\ P3 P2.y >= P3.y (!)
#
We need to compute the vertical maximum of this arc to be able
to compute a profile's height (the point marked by an `x'). The
arc's equation indicates that a direct computation is possible,
but we rely on a different technique, which use will become
apparent soon.
Bézier arcs have the special property of being very easily
decomposed into two sub-arcs, which are themselves Bézier arcs.
Moreover, it is easy to prove that there is at most one vertical
extremum on each Bézier arc (for second-degree curves; similar
conditions can be found for third-order arcs).
For instance, the following arc P1P2P3 can be decomposed into
two sub-arcs Q1Q2Q3 and R1R2R3:
P2
*
# on curve
* off curve
original Bézier arc P1P2P3.
__---__
_-- --_
_- -_
- -
/ \
/ \
# #
P1 P3
P2
*
Q3 Decomposed into two subarcs
Q2 R2 Q1Q2Q3 and R1R2R3
* __-#-__ *
_-- --_
_- R1 -_ Q1 = P1 R3 = P3
- - Q2 = (P1+P2)/2 R2 = (P2+P3)/2
/ \
/ \ Q3 = R1 = (Q2+R2)/2
# #
Q1 R3 Note that Q2, R2, and Q3=R1
are on a single line which is
tangent to the curve.
We have then decomposed a non-y-monotonic Bézier curve into two
smaller sub-arcs. Note that in the above drawing, both sub-arcs
are monotonic, and that the extremum is then Q3=R1. However, in
a more general case, only one sub-arc is guaranteed to be
monotonic. Getting back to our former example:
Q2
*
__-x--_ R1
_-- #_
Q1 _- Q3 - R2
# \ *
-
\
\ R3
#
Here, we see that, though Q1Q2Q3 is still non-monotonic, R1R2R3
is ever descending: We thus know that it doesn't contain the
extremum. We can then re-subdivide Q1Q2Q3 into two sub-arcs and
go on recursively, stopping when we encounter two monotonic
subarcs, or when the subarcs become simply too small.
We will finally find the vertical extremum. Note that the
iterative process of finding an extremum is called `flattening'.
e. Computing Profiles Coordinates
Once we have the height of each profile, we are able to allocate
it in the render pool. The next task is to compute coordinates
for each scanline.
In the case of segments, the computation is straightforward,
using the Euclidean algorithm (also known as Bresenham).
However, for Bézier arcs, the job is a little more complicated.
We assume that all Béziers that are part of a profile are the
result of flattening the curve, which means that they are all
y-monotonic (ascending or descending, and never flat). We now
have to compute the intersections of arcs with the profile's
scanlines. One way is to use a similar scheme to flattening
called `stepping'.
Consider this arc, going from P1 to
--------------------- P3. Suppose that we need to
compute its intersections with the
drawn scanlines. As already
--------------------- mentioned this can be done
directly, but the involved
* P2 _---# P3 algorithm is far too slow.
------------- _-- --
_-
_/ Instead, it is still possible to
---------/----------- use the decomposition property in
/ the same recursive way, i.e.,
| subdivide the arc into subarcs
------|-------------- until these get too small to cross
| more than one scanline!
|
-----|--------------- This is very easily done using a
| rasterizer-managed stack of
| subarcs.
# P1
f. Sweeping and Sorting the Spans
Once all our profiles have been computed, we begin the sweep to
build (and fill) the spans.
As both the TrueType and Type 1 specifications use the winding
fill rule (but with opposite directions), we place, on each
scanline, the present profiles in two separate lists.
One list, called the `left' one, only contains ascending
profiles, while the other `right' list contains the descending
profiles.
As each glyph is made of closed curves, a simple geometric
property ensures that the two lists contain the same number of
elements.
Creating spans is thus straightforward:
1. We sort each list in increasing horizontal order.
2. We pair each value of the left list with its corresponding
value in the right list.
/ / | | For example, we have here
/ / | | four profiles. Two of
>/ / | | | them are ascending (1 &
1// / ^ | | | 2 3), while the two others
// // 3| | | v are descending (2 & 4).
/ //4 | | | On the given scanline,
a / /< | | the left list is (1,3),
- - - *-----* - - - - *---* - - y - and the right one is
/ / b c| |d (4,2) (sorted).
There are then two spans, joining
1 to 4 (i.e. a-b) and 3 to 2
(i.e. c-d)!
Sorting doesn't necessarily take much time, as in 99 cases out
of 100, the lists' order is kept from one scanline to the next.
We can thus implement it with two simple singly-linked lists,
sorted by a classic bubble-sort, which takes a minimum amount of
time when the lists are already sorted.
A previous version of the rasterizer used more elaborate
structures, like arrays to perform `faster' sorting. It turned
out that this old scheme is not faster than the one described
above.
Once the spans have been `created', we can simply draw them in
the target bitmap.
------------------------------------------------------------------------
Copyright 2003-2017 by
David Turner, Robert Wilhelm, and Werner Lemberg.
This file is part of the FreeType project, and may only be used,
modified, and distributed under the terms of the FreeType project
license, LICENSE.TXT. By continuing to use, modify, or distribute this
file you indicate that you have read the license and understand and
accept it fully.
--- end of raster.txt ---
Local Variables:
coding: utf-8
End:
libs/freetype-2.8.1/docs/reference/README
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After saying `make refdoc' this directory contains the FreeType API
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libs/freetype-2.8.1/docs/reference/ft2-auto_hinter.html
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<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table>
<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="auto_hinter">The auto-hinter</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#glyph-to-script-map">glyph-to-script-map</a></td><td><a href="#FT_Prop_IncreaseXHeight">FT_Prop_IncreaseXHeight</a></td></tr>
<tr><td><a href="#FT_AUTOHINTER_SCRIPT_XXX">FT_AUTOHINTER_SCRIPT_XXX</a></td><td><a href="#warping">warping</a></td></tr>
<tr><td><a href="#FT_Prop_GlyphToScriptMap">FT_Prop_GlyphToScriptMap</a></td><td><a href="#no-stem-darkening(autofit)">no-stem-darkening</a></td></tr>
<tr><td><a href="#fallback-script">fallback-script</a></td><td><a href="#FT_PARAM_TAG_STEM_DARKENING">FT_PARAM_TAG_STEM_DARKENING</a></td></tr>
<tr><td><a href="#default-script">default-script</a></td><td><a href="#darkening-parameters(autofit)">darkening-parameters</a></td></tr>
<tr><td><a href="#increase-x-height">increase-x-height</a></td><td></td></tr>
</table>
<p>While FreeType's auto-hinter doesn't expose API functions by itself, it is possible to control its behaviour with <a href="ft2-module_management.html#FT_Property_Set">FT_Property_Set</a> and <a href="ft2-module_management.html#FT_Property_Get">FT_Property_Get</a>. The following lists the available properties together with the necessary macros and structures.</p>
<p>Note that the auto-hinter's module name is &lsquo;autofitter&rsquo; for historical reasons.</p>
<div class="section">
<h3 id="glyph-to-script-map">glyph-to-script-map</h3>
<p><b>Experimental</b> <b>only</b></p>
<p>The auto-hinter provides various script modules to hint glyphs. Examples of supported scripts are Latin or CJK. Before a glyph is auto-hinted, the Unicode character map of the font gets examined, and the script is then determined based on Unicode character ranges, see below.</p>
<p>OpenType fonts, however, often provide much more glyphs than character codes (small caps, superscripts, ligatures, swashes, etc.), to be controlled by so-called &lsquo;features&rsquo;. Handling OpenType features can be quite complicated and thus needs a separate library on top of FreeType.</p>
<p>The mapping between glyph indices and scripts (in the auto-hinter sense, see the <a href="ft2-auto_hinter.html#FT_AUTOHINTER_SCRIPT_XXX">FT_AUTOHINTER_SCRIPT_XXX</a> values) is stored as an array with &lsquo;num_glyphs&rsquo; elements, as found in the font's <a href="ft2-base_interface.html#FT_Face">FT_Face</a> structure. The &lsquo;glyph-to-script-map&rsquo; property returns a pointer to this array, which can be modified as needed. Note that the modification should happen before the first glyph gets processed by the auto-hinter so that the global analysis of the font shapes actually uses the modified mapping.</p>
<p>The following example code demonstrates how to access it (omitting the error handling).</p>
<pre class="colored">
FT_Library library;
FT_Face face;
FT_Prop_GlyphToScriptMap prop;
FT_Init_FreeType( &amp;library );
FT_New_Face( library, "foo.ttf", 0, &amp;face );
prop.face = face;
FT_Property_Get( library, "autofitter",
"glyph-to-script-map", &amp;prop );
// adjust `prop.map' as needed right here
FT_Load_Glyph( face, ..., FT_LOAD_FORCE_AUTOHINT );
</pre>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_AUTOHINTER_SCRIPT_XXX">FT_AUTOHINTER_SCRIPT_XXX</h3>
<p>Defined in FT_AUTOHINTER_H (freetype/ftautoh.h).</p>
<pre>
#define <a href="ft2-auto_hinter.html#FT_AUTOHINTER_SCRIPT_NONE">FT_AUTOHINTER_SCRIPT_NONE</a> 0
#define <a href="ft2-auto_hinter.html#FT_AUTOHINTER_SCRIPT_LATIN">FT_AUTOHINTER_SCRIPT_LATIN</a> 1
#define <a href="ft2-auto_hinter.html#FT_AUTOHINTER_SCRIPT_CJK">FT_AUTOHINTER_SCRIPT_CJK</a> 2
#define <a href="ft2-auto_hinter.html#FT_AUTOHINTER_SCRIPT_INDIC">FT_AUTOHINTER_SCRIPT_INDIC</a> 3
</pre>
<p><b>Experimental</b> <b>only</b></p>
<p>A list of constants used for the <a href="ft2-auto_hinter.html#glyph-to-script-map">glyph-to-script-map</a> property to specify the script submodule the auto-hinter should use for hinting a particular glyph.</p>
<h4>values</h4>
<table class="fields">
<tr><td class="val" id="FT_AUTOHINTER_SCRIPT_NONE">FT_AUTOHINTER_SCRIPT_NONE</td><td class="desc">
<p>Don't auto-hint this glyph.</p>
</td></tr>
<tr><td class="val" id="FT_AUTOHINTER_SCRIPT_LATIN">FT_AUTOHINTER_SCRIPT_LATIN</td><td class="desc">
<p>Apply the latin auto-hinter. For the auto-hinter, &lsquo;latin&rsquo; is a very broad term, including Cyrillic and Greek also since characters from those scripts share the same design constraints.</p>
<p>By default, characters from the following Unicode ranges are assigned to this submodule.</p>
<pre class="colored">
U+0020 - U+007F // Basic Latin (no control characters)
U+00A0 - U+00FF // Latin-1 Supplement (no control characters)
U+0100 - U+017F // Latin Extended-A
U+0180 - U+024F // Latin Extended-B
U+0250 - U+02AF // IPA Extensions
U+02B0 - U+02FF // Spacing Modifier Letters
U+0300 - U+036F // Combining Diacritical Marks
U+0370 - U+03FF // Greek and Coptic
U+0400 - U+04FF // Cyrillic
U+0500 - U+052F // Cyrillic Supplement
U+1D00 - U+1D7F // Phonetic Extensions
U+1D80 - U+1DBF // Phonetic Extensions Supplement
U+1DC0 - U+1DFF // Combining Diacritical Marks Supplement
U+1E00 - U+1EFF // Latin Extended Additional
U+1F00 - U+1FFF // Greek Extended
U+2000 - U+206F // General Punctuation
U+2070 - U+209F // Superscripts and Subscripts
U+20A0 - U+20CF // Currency Symbols
U+2150 - U+218F // Number Forms
U+2460 - U+24FF // Enclosed Alphanumerics
U+2C60 - U+2C7F // Latin Extended-C
U+2DE0 - U+2DFF // Cyrillic Extended-A
U+2E00 - U+2E7F // Supplemental Punctuation
U+A640 - U+A69F // Cyrillic Extended-B
U+A720 - U+A7FF // Latin Extended-D
U+FB00 - U+FB06 // Alphab. Present. Forms (Latin Ligatures)
U+1D400 - U+1D7FF // Mathematical Alphanumeric Symbols
U+1F100 - U+1F1FF // Enclosed Alphanumeric Supplement
</pre>
<p></p>
</td></tr>
<tr><td class="val" id="FT_AUTOHINTER_SCRIPT_CJK">FT_AUTOHINTER_SCRIPT_CJK</td><td class="desc">
<p>Apply the CJK auto-hinter, covering Chinese, Japanese, Korean, old Vietnamese, and some other scripts.</p>
<p>By default, characters from the following Unicode ranges are assigned to this submodule.</p>
<pre class="colored">
U+1100 - U+11FF // Hangul Jamo
U+2E80 - U+2EFF // CJK Radicals Supplement
U+2F00 - U+2FDF // Kangxi Radicals
U+2FF0 - U+2FFF // Ideographic Description Characters
U+3000 - U+303F // CJK Symbols and Punctuation
U+3040 - U+309F // Hiragana
U+30A0 - U+30FF // Katakana
U+3100 - U+312F // Bopomofo
U+3130 - U+318F // Hangul Compatibility Jamo
U+3190 - U+319F // Kanbun
U+31A0 - U+31BF // Bopomofo Extended
U+31C0 - U+31EF // CJK Strokes
U+31F0 - U+31FF // Katakana Phonetic Extensions
U+3200 - U+32FF // Enclosed CJK Letters and Months
U+3300 - U+33FF // CJK Compatibility
U+3400 - U+4DBF // CJK Unified Ideographs Extension A
U+4DC0 - U+4DFF // Yijing Hexagram Symbols
U+4E00 - U+9FFF // CJK Unified Ideographs
U+A960 - U+A97F // Hangul Jamo Extended-A
U+AC00 - U+D7AF // Hangul Syllables
U+D7B0 - U+D7FF // Hangul Jamo Extended-B
U+F900 - U+FAFF // CJK Compatibility Ideographs
U+FE10 - U+FE1F // Vertical forms
U+FE30 - U+FE4F // CJK Compatibility Forms
U+FF00 - U+FFEF // Halfwidth and Fullwidth Forms
U+1B000 - U+1B0FF // Kana Supplement
U+1D300 - U+1D35F // Tai Xuan Hing Symbols
U+1F200 - U+1F2FF // Enclosed Ideographic Supplement
U+20000 - U+2A6DF // CJK Unified Ideographs Extension B
U+2A700 - U+2B73F // CJK Unified Ideographs Extension C
U+2B740 - U+2B81F // CJK Unified Ideographs Extension D
U+2F800 - U+2FA1F // CJK Compatibility Ideographs Supplement
</pre>
<p></p>
</td></tr>
<tr><td class="val" id="FT_AUTOHINTER_SCRIPT_INDIC">FT_AUTOHINTER_SCRIPT_INDIC</td><td class="desc">
<p>Apply the indic auto-hinter, covering all major scripts from the Indian sub-continent and some other related scripts like Thai, Lao, or Tibetan.</p>
<p>By default, characters from the following Unicode ranges are assigned to this submodule.</p>
<pre class="colored">
U+0900 - U+0DFF // Indic Range
U+0F00 - U+0FFF // Tibetan
U+1900 - U+194F // Limbu
U+1B80 - U+1BBF // Sundanese
U+A800 - U+A82F // Syloti Nagri
U+ABC0 - U+ABFF // Meetei Mayek
U+11800 - U+118DF // Sharada
</pre>
<p>Note that currently Indic support is rudimentary only, missing blue zone support.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Prop_GlyphToScriptMap">FT_Prop_GlyphToScriptMap</h3>
<p>Defined in FT_AUTOHINTER_H (freetype/ftautoh.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Prop_GlyphToScriptMap_
{
<a href="ft2-base_interface.html#FT_Face">FT_Face</a> face;
<a href="ft2-basic_types.html#FT_UShort">FT_UShort</a>* map;
} <b>FT_Prop_GlyphToScriptMap</b>;
</pre>
<p><b>Experimental</b> <b>only</b></p>
<p>The data exchange structure for the <a href="ft2-auto_hinter.html#glyph-to-script-map">glyph-to-script-map</a> property.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="fallback-script">fallback-script</h3>
<p><b>Experimental</b> <b>only</b></p>
<p>If no auto-hinter script module can be assigned to a glyph, a fallback script gets assigned to it (see also the <a href="ft2-auto_hinter.html#glyph-to-script-map">glyph-to-script-map</a> property). By default, this is <a href="ft2-auto_hinter.html#FT_AUTOHINTER_SCRIPT_XXX">FT_AUTOHINTER_SCRIPT_CJK</a>. Using the &lsquo;fallback-script&rsquo; property, this fallback value can be changed.</p>
<pre class="colored">
FT_Library library;
FT_UInt fallback_script = FT_AUTOHINTER_SCRIPT_NONE;
FT_Init_FreeType( &amp;library );
FT_Property_Set( library, "autofitter",
"fallback-script", &amp;fallback_script );
</pre>
<h4>note</h4>
<p>This property can be used with <a href="ft2-module_management.html#FT_Property_Get">FT_Property_Get</a> also.</p>
<p>It's important to use the right timing for changing this value: The creation of the glyph-to-script map that eventually uses the fallback script value gets triggered either by setting or reading a face-specific property like <a href="ft2-auto_hinter.html#glyph-to-script-map">glyph-to-script-map</a>, or by auto-hinting any glyph from that face. In particular, if you have already created an <a href="ft2-base_interface.html#FT_Face">FT_Face</a> structure but not loaded any glyph (using the auto-hinter), a change of the fallback script will affect this face.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="default-script">default-script</h3>
<p><b>Experimental</b> <b>only</b></p>
<p>If FreeType gets compiled with FT_CONFIG_OPTION_USE_HARFBUZZ to make the HarfBuzz library access OpenType features for getting better glyph coverages, this property sets the (auto-fitter) script to be used for the default (OpenType) script data of a font's GSUB table. Features for the default script are intended for all scripts not explicitly handled in GSUB; an example is a &lsquo;dlig&rsquo; feature, containing the combination of the characters &lsquo;T&rsquo;, &lsquo;E&rsquo;, and &lsquo;L&rsquo; to form a &lsquo;TEL&rsquo; ligature.</p>
<p>By default, this is <a href="ft2-auto_hinter.html#FT_AUTOHINTER_SCRIPT_XXX">FT_AUTOHINTER_SCRIPT_LATIN</a>. Using the &lsquo;default-script&rsquo; property, this default value can be changed.</p>
<pre class="colored">
FT_Library library;
FT_UInt default_script = FT_AUTOHINTER_SCRIPT_NONE;
FT_Init_FreeType( &amp;library );
FT_Property_Set( library, "autofitter",
"default-script", &amp;default_script );
</pre>
<h4>note</h4>
<p>This property can be used with <a href="ft2-module_management.html#FT_Property_Get">FT_Property_Get</a> also.</p>
<p>It's important to use the right timing for changing this value: The creation of the glyph-to-script map that eventually uses the default script value gets triggered either by setting or reading a face-specific property like <a href="ft2-auto_hinter.html#glyph-to-script-map">glyph-to-script-map</a>, or by auto-hinting any glyph from that face. In particular, if you have already created an <a href="ft2-base_interface.html#FT_Face">FT_Face</a> structure but not loaded any glyph (using the auto-hinter), a change of the default script will affect this face.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="increase-x-height">increase-x-height</h3>
<p>For ppem values in the range 6&nbsp;&lt;= ppem &lt;= &lsquo;increase-x-height&rsquo;, round up the font's x&nbsp;height much more often than normally. If the value is set to&nbsp;0, which is the default, this feature is switched off. Use this property to improve the legibility of small font sizes if necessary.</p>
<pre class="colored">
FT_Library library;
FT_Face face;
FT_Prop_IncreaseXHeight prop;
FT_Init_FreeType( &amp;library );
FT_New_Face( library, "foo.ttf", 0, &amp;face );
FT_Set_Char_Size( face, 10 * 64, 0, 72, 0 );
prop.face = face;
prop.limit = 14;
FT_Property_Set( library, "autofitter",
"increase-x-height", &amp;prop );
</pre>
<h4>note</h4>
<p>This property can be used with <a href="ft2-module_management.html#FT_Property_Get">FT_Property_Get</a> also.</p>
<p>Set this value right after calling <a href="ft2-base_interface.html#FT_Set_Char_Size">FT_Set_Char_Size</a>, but before loading any glyph (using the auto-hinter).</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Prop_IncreaseXHeight">FT_Prop_IncreaseXHeight</h3>
<p>Defined in FT_AUTOHINTER_H (freetype/ftautoh.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Prop_IncreaseXHeight_
{
<a href="ft2-base_interface.html#FT_Face">FT_Face</a> face;
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> limit;
} <b>FT_Prop_IncreaseXHeight</b>;
</pre>
<p>The data exchange structure for the <a href="ft2-auto_hinter.html#increase-x-height">increase-x-height</a> property.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="warping">warping</h3>
<p><b>Experimental</b> <b>only</b></p>
<p>If FreeType gets compiled with option AF_CONFIG_OPTION_USE_WARPER to activate the warp hinting code in the auto-hinter, this property switches warping on and off.</p>
<p>Warping only works in &lsquo;normal&rsquo; auto-hinting mode replacing it. The idea of the code is to slightly scale and shift a glyph along the non-hinted dimension (which is usually the horizontal axis) so that as much of its segments are aligned (more or less) to the grid. To find out a glyph's optimal scaling and shifting value, various parameter combinations are tried and scored.</p>
<p>By default, warping is off. The example below shows how to switch on warping (omitting the error handling).</p>
<pre class="colored">
FT_Library library;
FT_Bool warping = 1;
FT_Init_FreeType( &amp;library );
FT_Property_Set( library, "autofitter",
"warping", &amp;warping );
</pre>
<h4>note</h4>
<p>This property can be used with <a href="ft2-module_management.html#FT_Property_Get">FT_Property_Get</a> also.</p>
<p>This property can be set via the &lsquo;FREETYPE_PROPERTIES&rsquo; environment variable (using values 1 and 0 for &lsquo;on&rsquo; and &lsquo;off&rsquo;, respectively).</p>
<p>The warping code can also change advance widths. Have a look at the &lsquo;lsb_delta&rsquo; and &lsquo;rsb_delta&rsquo; fields in the <a href="ft2-base_interface.html#FT_GlyphSlotRec">FT_GlyphSlotRec</a> structure for details on improving inter-glyph distances while rendering.</p>
<p>Since warping is a global property of the auto-hinter it is best to change its value before rendering any face. Otherwise, you should reload all faces that get auto-hinted in &lsquo;normal&rsquo; hinting mode.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="no-stem-darkening(autofit)">no-stem-darkening</h3>
<p><b>Experimental</b> <b>only</b>, <b>requires</b> <b>linear</b> <b>alpha</b> <b>blending</b> <b>and</b> <b>gamma</b> <b>correction</b></p>
<p>Stem darkening emboldens glyphs at smaller sizes to make them more readable on common low-DPI screens when using linear alpha blending and gamma correction, see <a href="ft2-base_interface.html#FT_Render_Glyph">FT_Render_Glyph</a>. When not using linear alpha blending and gamma correction, glyphs will appear heavy and fuzzy!</p>
<p>Gamma correction essentially lightens fonts since shades of grey are shifted to higher pixel values (=&nbsp;higher brightness) to match the original intention to the reality of our screens. The side-effect is that glyphs &lsquo;thin out&rsquo;. Mac OS&nbsp;X and Adobe's proprietary font rendering library implement a counter-measure: stem darkening at smaller sizes where shades of gray dominate. By emboldening a glyph slightly in relation to its pixel size, individual pixels get higher coverage of filled-in outlines and are therefore &lsquo;blacker&rsquo;. This counteracts the &lsquo;thinning out&rsquo; of glyphs, making text remain readable at smaller sizes. All glyphs that pass through the auto-hinter will be emboldened unless this property is set to TRUE.</p>
<p>See the description of the CFF driver for algorithmic details. Total consistency with the CFF driver is currently not achieved because the emboldening method differs and glyphs must be scaled down on the Y-axis to keep outline points inside their precomputed blue zones. The smaller the size (especially 9ppem and down), the higher the loss of emboldening versus the CFF driver.</p>
<p>This property can be set via the &lsquo;FREETYPE_PROPERTIES&rsquo; environment variable similar to the CFF driver. It can also be set per face using <a href="ft2-base_interface.html#FT_Face_Properties">FT_Face_Properties</a> with <a href="ft2-auto_hinter.html#FT_PARAM_TAG_STEM_DARKENING">FT_PARAM_TAG_STEM_DARKENING</a>.</p>
<hr>
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<div class="section">
<h3 id="FT_PARAM_TAG_STEM_DARKENING">FT_PARAM_TAG_STEM_DARKENING</h3>
<p>Defined in FT_AUTOHINTER_H (freetype/ftautoh.h).</p>
<pre>
#define <b>FT_PARAM_TAG_STEM_DARKENING</b> \
<a href="ft2-basic_types.html#FT_MAKE_TAG">FT_MAKE_TAG</a>( 'd', 'a', 'r', 'k' )
</pre>
<p>An <a href="ft2-base_interface.html#FT_Parameter">FT_Parameter</a> tag to be used with <a href="ft2-base_interface.html#FT_Face_Properties">FT_Face_Properties</a>. The corresponding Boolean argument specifies whether to apply stem darkening, overriding the global default values or the values set up with <a href="ft2-module_management.html#FT_Property_Set">FT_Property_Set</a> (see <a href="ft2-auto_hinter.html#no-stem-darkening(autofit)">no-stem-darkening</a> and <a href="ft2-cff_driver.html#no-stem-darkening(cff)">no-stem-darkening</a>).</p>
<p>This is a passive setting that only takes effect if the font driver or autohinter honors it, which the CFF driver always does, but the autohinter only in &lsquo;light&rsquo; hinting mode (as of version 2.7.0).</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="darkening-parameters(autofit)">darkening-parameters</h3>
<p><b>Experimental</b> <b>only</b></p>
<p>See the description of the CFF driver for details. This implementation appropriates the CFF_CONFIG_OPTION_DARKENING_PARAMETER_* #defines for consistency. Note the differences described in <a href="ft2-auto_hinter.html#no-stem-darkening(autofit)">no-stem-darkening</a>.</p>
<p>This property can be set via the &lsquo;FREETYPE_PROPERTIES&rsquo; environment variable similar to the CFF driver.</p>
<hr>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="basic_types">Basic Data Types</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_Byte">FT_Byte</a></td><td><a href="#FT_Bool">FT_Bool</a></td><td><a href="#FT_UnitVector">FT_UnitVector</a></td></tr>
<tr><td><a href="#FT_Bytes">FT_Bytes</a></td><td><a href="#FT_Offset">FT_Offset</a></td><td><a href="#FT_F26Dot6">FT_F26Dot6</a></td></tr>
<tr><td><a href="#FT_Char">FT_Char</a></td><td><a href="#FT_PtrDist">FT_PtrDist</a></td><td><a href="#FT_Data">FT_Data</a></td></tr>
<tr><td><a href="#FT_Int">FT_Int</a></td><td><a href="#FT_String">FT_String</a></td><td>&nbsp;</td></tr>
<tr><td><a href="#FT_UInt">FT_UInt</a></td><td><a href="#FT_Tag">FT_Tag</a></td><td><a href="#FT_MAKE_TAG">FT_MAKE_TAG</a></td></tr>
<tr><td><a href="#FT_Int16">FT_Int16</a></td><td><a href="#FT_Error">FT_Error</a></td><td>&nbsp;</td></tr>
<tr><td><a href="#FT_UInt16">FT_UInt16</a></td><td><a href="#FT_Fixed">FT_Fixed</a></td><td><a href="#FT_Generic">FT_Generic</a></td></tr>
<tr><td><a href="#FT_Int32">FT_Int32</a></td><td><a href="#FT_Pointer">FT_Pointer</a></td><td><a href="#FT_Generic_Finalizer">FT_Generic_Finalizer</a></td></tr>
<tr><td><a href="#FT_UInt32">FT_UInt32</a></td><td><a href="#FT_Pos">FT_Pos</a></td><td>&nbsp;</td></tr>
<tr><td><a href="#FT_Int64">FT_Int64</a></td><td><a href="#FT_Vector">FT_Vector</a></td><td><a href="#FT_Bitmap">FT_Bitmap</a></td></tr>
<tr><td><a href="#FT_UInt64">FT_UInt64</a></td><td><a href="#FT_BBox">FT_BBox</a></td><td><a href="#FT_Pixel_Mode">FT_Pixel_Mode</a></td></tr>
<tr><td><a href="#FT_Short">FT_Short</a></td><td><a href="#FT_Matrix">FT_Matrix</a></td><td><a href="#FT_Palette_Mode">FT_Palette_Mode</a></td></tr>
<tr><td><a href="#FT_UShort">FT_UShort</a></td><td><a href="#FT_FWord">FT_FWord</a></td><td><a href="#FT_Glyph_Format">FT_Glyph_Format</a></td></tr>
<tr><td><a href="#FT_Long">FT_Long</a></td><td><a href="#FT_UFWord">FT_UFWord</a></td><td><a href="#FT_IMAGE_TAG">FT_IMAGE_TAG</a></td></tr>
<tr><td><a href="#FT_ULong">FT_ULong</a></td><td><a href="#FT_F2Dot14">FT_F2Dot14</a></td><td></td></tr>
</table>
<p>This section contains the basic data types defined by FreeType&nbsp;2, ranging from simple scalar types to bitmap descriptors. More font-specific structures are defined in a different section.</p>
<div class="section">
<h3 id="FT_Byte">FT_Byte</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">unsigned</span> <span class="keyword">char</span> <b>FT_Byte</b>;
</pre>
<p>A simple typedef for the <i>unsigned</i> char type.</p>
<hr>
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<div class="section">
<h3 id="FT_Bytes">FT_Bytes</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">const</span> <a href="ft2-basic_types.html#FT_Byte">FT_Byte</a>* <b>FT_Bytes</b>;
</pre>
<p>A typedef for constant memory areas.</p>
<hr>
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<div class="section">
<h3 id="FT_Char">FT_Char</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">signed</span> <span class="keyword">char</span> <b>FT_Char</b>;
</pre>
<p>A simple typedef for the <i>signed</i> char type.</p>
<hr>
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<div class="section">
<h3 id="FT_Int">FT_Int</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">signed</span> <span class="keyword">int</span> <b>FT_Int</b>;
</pre>
<p>A typedef for the int type.</p>
<hr>
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<div class="section">
<h3 id="FT_UInt">FT_UInt</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">unsigned</span> <span class="keyword">int</span> <b>FT_UInt</b>;
</pre>
<p>A typedef for the unsigned int type.</p>
<hr>
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<div class="section">
<h3 id="FT_Int16">FT_Int16</h3>
<p>Defined in FT_CONFIG_CONFIG_H (freetype/config/ftconfig.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">signed</span> <span class="keyword">short</span> <b>FT_Int16</b>;
</pre>
<p>A typedef for a 16bit signed integer type.</p>
<hr>
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<div class="section">
<h3 id="FT_UInt16">FT_UInt16</h3>
<p>Defined in FT_CONFIG_CONFIG_H (freetype/config/ftconfig.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">unsigned</span> <span class="keyword">short</span> <b>FT_UInt16</b>;
</pre>
<p>A typedef for a 16bit unsigned integer type.</p>
<hr>
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<div class="section">
<h3 id="FT_Int32">FT_Int32</h3>
<p>Defined in FT_CONFIG_CONFIG_H (freetype/config/ftconfig.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">signed</span> XXX <b>FT_Int32</b>;
</pre>
<p>A typedef for a 32bit signed integer type. The size depends on the configuration.</p>
<hr>
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<div class="section">
<h3 id="FT_UInt32">FT_UInt32</h3>
<p>Defined in FT_CONFIG_CONFIG_H (freetype/config/ftconfig.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">unsigned</span> XXX <b>FT_UInt32</b>;
</pre>
<hr>
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<div class="section">
<h3 id="FT_Int64">FT_Int64</h3>
<p>Defined in FT_CONFIG_CONFIG_H (freetype/config/ftconfig.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">signed</span> XXX <b>FT_Int64</b>;
</pre>
<hr>
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<div class="section">
<h3 id="FT_UInt64">FT_UInt64</h3>
<p>Defined in FT_CONFIG_CONFIG_H (freetype/config/ftconfig.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">unsigned</span> XXX <b>FT_UInt64</b>;
</pre>
<hr>
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<div class="section">
<h3 id="FT_Short">FT_Short</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">signed</span> <span class="keyword">short</span> <b>FT_Short</b>;
</pre>
<p>A typedef for signed short.</p>
<hr>
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<div class="section">
<h3 id="FT_UShort">FT_UShort</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">unsigned</span> <span class="keyword">short</span> <b>FT_UShort</b>;
</pre>
<p>A typedef for unsigned short.</p>
<hr>
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<div class="section">
<h3 id="FT_Long">FT_Long</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">signed</span> <span class="keyword">long</span> <b>FT_Long</b>;
</pre>
<p>A typedef for signed long.</p>
<hr>
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<div class="section">
<h3 id="FT_ULong">FT_ULong</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">unsigned</span> <span class="keyword">long</span> <b>FT_ULong</b>;
</pre>
<p>A typedef for unsigned long.</p>
<hr>
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<div class="section">
<h3 id="FT_Bool">FT_Bool</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">unsigned</span> <span class="keyword">char</span> <b>FT_Bool</b>;
</pre>
<p>A typedef of unsigned char, used for simple booleans. As usual, values 1 and&nbsp;0 represent true and false, respectively.</p>
<hr>
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<div class="section">
<h3 id="FT_Offset">FT_Offset</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> size_t <b>FT_Offset</b>;
</pre>
<p>This is equivalent to the ANSI&nbsp;C &lsquo;size_t&rsquo; type, i.e., the largest <i>unsigned</i> integer type used to express a file size or position, or a memory block size.</p>
<hr>
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<div class="section">
<h3 id="FT_PtrDist">FT_PtrDist</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> ft_ptrdiff_t <b>FT_PtrDist</b>;
</pre>
<p>This is equivalent to the ANSI&nbsp;C &lsquo;ptrdiff_t&rsquo; type, i.e., the largest <i>signed</i> integer type used to express the distance between two pointers.</p>
<hr>
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<div class="section">
<h3 id="FT_String">FT_String</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">char</span> <b>FT_String</b>;
</pre>
<p>A simple typedef for the char type, usually used for strings.</p>
<hr>
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<div class="section">
<h3 id="FT_Tag">FT_Tag</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> <a href="ft2-basic_types.html#FT_UInt32">FT_UInt32</a> <b>FT_Tag</b>;
</pre>
<p>A typedef for 32-bit tags (as used in the SFNT format).</p>
<hr>
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<div class="section">
<h3 id="FT_Error">FT_Error</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">int</span> <b>FT_Error</b>;
</pre>
<p>The FreeType error code type. A value of&nbsp;0 is always interpreted as a successful operation.</p>
<hr>
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<div class="section">
<h3 id="FT_Fixed">FT_Fixed</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">signed</span> <span class="keyword">long</span> <b>FT_Fixed</b>;
</pre>
<p>This type is used to store 16.16 fixed-point values, like scaling values or matrix coefficients.</p>
<hr>
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<div class="section">
<h3 id="FT_Pointer">FT_Pointer</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">void</span>* <b>FT_Pointer</b>;
</pre>
<p>A simple typedef for a typeless pointer.</p>
<hr>
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<div class="section">
<h3 id="FT_Pos">FT_Pos</h3>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">signed</span> <span class="keyword">long</span> <b>FT_Pos</b>;
</pre>
<p>The type FT_Pos is used to store vectorial coordinates. Depending on the context, these can represent distances in integer font units, or 16.16, or 26.6 fixed-point pixel coordinates.</p>
<hr>
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<div class="section">
<h3 id="FT_Vector">FT_Vector</h3>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Vector_
{
<a href="ft2-basic_types.html#FT_Pos">FT_Pos</a> x;
<a href="ft2-basic_types.html#FT_Pos">FT_Pos</a> y;
} <b>FT_Vector</b>;
</pre>
<p>A simple structure used to store a 2D vector; coordinates are of the FT_Pos type.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="x">x</td><td class="desc">
<p>The horizontal coordinate.</p>
</td></tr>
<tr><td class="val" id="y">y</td><td class="desc">
<p>The vertical coordinate.</p>
</td></tr>
</table>
<hr>
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<div class="section">
<h3 id="FT_BBox">FT_BBox</h3>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_BBox_
{
<a href="ft2-basic_types.html#FT_Pos">FT_Pos</a> xMin, yMin;
<a href="ft2-basic_types.html#FT_Pos">FT_Pos</a> xMax, yMax;
} <b>FT_BBox</b>;
</pre>
<p>A structure used to hold an outline's bounding box, i.e., the coordinates of its extrema in the horizontal and vertical directions.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="xMin">xMin</td><td class="desc">
<p>The horizontal minimum (left-most).</p>
</td></tr>
<tr><td class="val" id="yMin">yMin</td><td class="desc">
<p>The vertical minimum (bottom-most).</p>
</td></tr>
<tr><td class="val" id="xMax">xMax</td><td class="desc">
<p>The horizontal maximum (right-most).</p>
</td></tr>
<tr><td class="val" id="yMax">yMax</td><td class="desc">
<p>The vertical maximum (top-most).</p>
</td></tr>
</table>
<h4>note</h4>
<p>The bounding box is specified with the coordinates of the lower left and the upper right corner. In PostScript, those values are often called (llx,lly) and (urx,ury), respectively.</p>
<p>If &lsquo;yMin&rsquo; is negative, this value gives the glyph's descender. Otherwise, the glyph doesn't descend below the baseline. Similarly, if &lsquo;ymax&rsquo; is positive, this value gives the glyph's ascender.</p>
<p>&lsquo;xMin&rsquo; gives the horizontal distance from the glyph's origin to the left edge of the glyph's bounding box. If &lsquo;xMin&rsquo; is negative, the glyph extends to the left of the origin.</p>
<hr>
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<div class="section">
<h3 id="FT_Matrix">FT_Matrix</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Matrix_
{
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> xx, xy;
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> yx, yy;
} <b>FT_Matrix</b>;
</pre>
<p>A simple structure used to store a 2x2 matrix. Coefficients are in 16.16 fixed-point format. The computation performed is:</p>
<pre class="colored">
x' = x*xx + y*xy
y' = x*yx + y*yy
</pre>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="xx">xx</td><td class="desc">
<p>Matrix coefficient.</p>
</td></tr>
<tr><td class="val" id="xy">xy</td><td class="desc">
<p>Matrix coefficient.</p>
</td></tr>
<tr><td class="val" id="yx">yx</td><td class="desc">
<p>Matrix coefficient.</p>
</td></tr>
<tr><td class="val" id="yy">yy</td><td class="desc">
<p>Matrix coefficient.</p>
</td></tr>
</table>
<hr>
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<div class="section">
<h3 id="FT_FWord">FT_FWord</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">signed</span> <span class="keyword">short</span> <b>FT_FWord</b>; /* distance in FUnits */
</pre>
<p>A signed 16-bit integer used to store a distance in original font units.</p>
<hr>
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<div class="section">
<h3 id="FT_UFWord">FT_UFWord</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">unsigned</span> <span class="keyword">short</span> <b>FT_UFWord</b>; /* <span class="keyword">unsigned</span> distance */
</pre>
<p>An unsigned 16-bit integer used to store a distance in original font units.</p>
<hr>
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<div class="section">
<h3 id="FT_F2Dot14">FT_F2Dot14</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">signed</span> <span class="keyword">short</span> <b>FT_F2Dot14</b>;
</pre>
<p>A signed 2.14 fixed-point type used for unit vectors.</p>
<hr>
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<div class="section">
<h3 id="FT_UnitVector">FT_UnitVector</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_UnitVector_
{
<a href="ft2-basic_types.html#FT_F2Dot14">FT_F2Dot14</a> x;
<a href="ft2-basic_types.html#FT_F2Dot14">FT_F2Dot14</a> y;
} <b>FT_UnitVector</b>;
</pre>
<p>A simple structure used to store a 2D vector unit vector. Uses FT_F2Dot14 types.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="x">x</td><td class="desc">
<p>Horizontal coordinate.</p>
</td></tr>
<tr><td class="val" id="y">y</td><td class="desc">
<p>Vertical coordinate.</p>
</td></tr>
</table>
<hr>
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<div class="section">
<h3 id="FT_F26Dot6">FT_F26Dot6</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">signed</span> <span class="keyword">long</span> <b>FT_F26Dot6</b>;
</pre>
<p>A signed 26.6 fixed-point type used for vectorial pixel coordinates.</p>
<hr>
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<div class="section">
<h3 id="FT_Data">FT_Data</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Data_
{
<span class="keyword">const</span> <a href="ft2-basic_types.html#FT_Byte">FT_Byte</a>* pointer;
<a href="ft2-basic_types.html#FT_Int">FT_Int</a> length;
} <b>FT_Data</b>;
</pre>
<p>Read-only binary data represented as a pointer and a length.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="pointer">pointer</td><td class="desc">
<p>The data.</p>
</td></tr>
<tr><td class="val" id="length">length</td><td class="desc">
<p>The length of the data in bytes.</p>
</td></tr>
</table>
<hr>
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<div class="section">
<h3 id="FT_MAKE_TAG">FT_MAKE_TAG</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
#define <b>FT_MAKE_TAG</b>( _x1, _x2, _x3, _x4 ) \
(<a href="ft2-basic_types.html#FT_Tag">FT_Tag</a>) \
( ( (<a href="ft2-basic_types.html#FT_ULong">FT_ULong</a>)_x1 &lt;&lt; 24 ) | \
( (<a href="ft2-basic_types.html#FT_ULong">FT_ULong</a>)_x2 &lt;&lt; 16 ) | \
( (<a href="ft2-basic_types.html#FT_ULong">FT_ULong</a>)_x3 &lt;&lt; 8 ) | \
(<a href="ft2-basic_types.html#FT_ULong">FT_ULong</a>)_x4 )
</pre>
<p>This macro converts four-letter tags that are used to label TrueType tables into an unsigned long, to be used within FreeType.</p>
<h4>note</h4>
<p>The produced values <b>must</b> be 32-bit integers. Don't redefine this macro.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Generic">FT_Generic</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Generic_
{
<span class="keyword">void</span>* data;
<a href="ft2-basic_types.html#FT_Generic_Finalizer">FT_Generic_Finalizer</a> finalizer;
} <b>FT_Generic</b>;
</pre>
<p>Client applications often need to associate their own data to a variety of FreeType core objects. For example, a text layout API might want to associate a glyph cache to a given size object.</p>
<p>Some FreeType object contains a &lsquo;generic&rsquo; field, of type FT_Generic, which usage is left to client applications and font servers.</p>
<p>It can be used to store a pointer to client-specific data, as well as the address of a &lsquo;finalizer&rsquo; function, which will be called by FreeType when the object is destroyed (for example, the previous client example would put the address of the glyph cache destructor in the &lsquo;finalizer&rsquo; field).</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="data">data</td><td class="desc">
<p>A typeless pointer to any client-specified data. This field is completely ignored by the FreeType library.</p>
</td></tr>
<tr><td class="val" id="finalizer">finalizer</td><td class="desc">
<p>A pointer to a &lsquo;generic finalizer&rsquo; function, which will be called when the object is destroyed. If this field is set to NULL, no code will be called.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Generic_Finalizer">FT_Generic_Finalizer</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">void</span> (*<b>FT_Generic_Finalizer</b>)(<span class="keyword">void</span>* object);
</pre>
<p>Describe a function used to destroy the &lsquo;client&rsquo; data of any FreeType object. See the description of the <a href="ft2-basic_types.html#FT_Generic">FT_Generic</a> type for details of usage.</p>
<h4>input</h4>
<p>The address of the FreeType object that is under finalization. Its client data is accessed through its &lsquo;generic&rsquo; field.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Bitmap">FT_Bitmap</h3>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Bitmap_
{
<span class="keyword">unsigned</span> <span class="keyword">int</span> rows;
<span class="keyword">unsigned</span> <span class="keyword">int</span> width;
<span class="keyword">int</span> pitch;
<span class="keyword">unsigned</span> <span class="keyword">char</span>* buffer;
<span class="keyword">unsigned</span> <span class="keyword">short</span> num_grays;
<span class="keyword">unsigned</span> <span class="keyword">char</span> pixel_mode;
<span class="keyword">unsigned</span> <span class="keyword">char</span> palette_mode;
<span class="keyword">void</span>* palette;
} <b>FT_Bitmap</b>;
</pre>
<p>A structure used to describe a bitmap or pixmap to the raster. Note that we now manage pixmaps of various depths through the &lsquo;pixel_mode&rsquo; field.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="rows">rows</td><td class="desc">
<p>The number of bitmap rows.</p>
</td></tr>
<tr><td class="val" id="width">width</td><td class="desc">
<p>The number of pixels in bitmap row.</p>
</td></tr>
<tr><td class="val" id="pitch">pitch</td><td class="desc">
<p>The pitch's absolute value is the number of bytes taken by one bitmap row, including padding. However, the pitch is positive when the bitmap has a &lsquo;down&rsquo; flow, and negative when it has an &lsquo;up&rsquo; flow. In all cases, the pitch is an offset to add to a bitmap pointer in order to go down one row.</p>
<p>Note that &lsquo;padding&rsquo; means the alignment of a bitmap to a byte border, and FreeType functions normally align to the smallest possible integer value.</p>
<p>For the B/W rasterizer, &lsquo;pitch&rsquo; is always an even number.</p>
<p>To change the pitch of a bitmap (say, to make it a multiple of 4), use <a href="ft2-bitmap_handling.html#FT_Bitmap_Convert">FT_Bitmap_Convert</a>. Alternatively, you might use callback functions to directly render to the application's surface; see the file &lsquo;example2.cpp&rsquo; in the tutorial for a demonstration.</p>
</td></tr>
<tr><td class="val" id="buffer">buffer</td><td class="desc">
<p>A typeless pointer to the bitmap buffer. This value should be aligned on 32-bit boundaries in most cases.</p>
</td></tr>
<tr><td class="val" id="num_grays">num_grays</td><td class="desc">
<p>This field is only used with <a href="ft2-basic_types.html#FT_Pixel_Mode">FT_PIXEL_MODE_GRAY</a>; it gives the number of gray levels used in the bitmap.</p>
</td></tr>
<tr><td class="val" id="pixel_mode">pixel_mode</td><td class="desc">
<p>The pixel mode, i.e., how pixel bits are stored. See <a href="ft2-basic_types.html#FT_Pixel_Mode">FT_Pixel_Mode</a> for possible values.</p>
</td></tr>
<tr><td class="val" id="palette_mode">palette_mode</td><td class="desc">
<p>This field is intended for paletted pixel modes; it indicates how the palette is stored. Not used currently.</p>
</td></tr>
<tr><td class="val" id="palette">palette</td><td class="desc">
<p>A typeless pointer to the bitmap palette; this field is intended for paletted pixel modes. Not used currently.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Pixel_Mode">FT_Pixel_Mode</h3>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">enum</span> FT_Pixel_Mode_
{
<a href="ft2-basic_types.html#FT_PIXEL_MODE_NONE">FT_PIXEL_MODE_NONE</a> = 0,
<a href="ft2-basic_types.html#FT_PIXEL_MODE_MONO">FT_PIXEL_MODE_MONO</a>,
<a href="ft2-basic_types.html#FT_PIXEL_MODE_GRAY">FT_PIXEL_MODE_GRAY</a>,
<a href="ft2-basic_types.html#FT_PIXEL_MODE_GRAY2">FT_PIXEL_MODE_GRAY2</a>,
<a href="ft2-basic_types.html#FT_PIXEL_MODE_GRAY4">FT_PIXEL_MODE_GRAY4</a>,
<a href="ft2-basic_types.html#FT_PIXEL_MODE_LCD">FT_PIXEL_MODE_LCD</a>,
<a href="ft2-basic_types.html#FT_PIXEL_MODE_LCD_V">FT_PIXEL_MODE_LCD_V</a>,
<a href="ft2-basic_types.html#FT_PIXEL_MODE_BGRA">FT_PIXEL_MODE_BGRA</a>,
FT_PIXEL_MODE_MAX /* do not remove */
} <b>FT_Pixel_Mode</b>;
/* these constants are deprecated; use the corresponding `<b>FT_Pixel_Mode</b>' */
/* values instead. */
#define ft_pixel_mode_none <a href="ft2-basic_types.html#FT_PIXEL_MODE_NONE">FT_PIXEL_MODE_NONE</a>
#define ft_pixel_mode_mono <a href="ft2-basic_types.html#FT_PIXEL_MODE_MONO">FT_PIXEL_MODE_MONO</a>
#define ft_pixel_mode_grays <a href="ft2-basic_types.html#FT_PIXEL_MODE_GRAY">FT_PIXEL_MODE_GRAY</a>
#define ft_pixel_mode_pal2 <a href="ft2-basic_types.html#FT_PIXEL_MODE_GRAY2">FT_PIXEL_MODE_GRAY2</a>
#define ft_pixel_mode_pal4 <a href="ft2-basic_types.html#FT_PIXEL_MODE_GRAY4">FT_PIXEL_MODE_GRAY4</a>
</pre>
<p>An enumeration type used to describe the format of pixels in a given bitmap. Note that additional formats may be added in the future.</p>
<h4>values</h4>
<table class="fields">
<tr><td class="val" id="FT_PIXEL_MODE_NONE">FT_PIXEL_MODE_NONE</td><td class="desc">
<p>Value&nbsp;0 is reserved.</p>
</td></tr>
<tr><td class="val" id="FT_PIXEL_MODE_MONO">FT_PIXEL_MODE_MONO</td><td class="desc">
<p>A monochrome bitmap, using 1&nbsp;bit per pixel. Note that pixels are stored in most-significant order (MSB), which means that the left-most pixel in a byte has value 128.</p>
</td></tr>
<tr><td class="val" id="FT_PIXEL_MODE_GRAY">FT_PIXEL_MODE_GRAY</td><td class="desc">
<p>An 8-bit bitmap, generally used to represent anti-aliased glyph images. Each pixel is stored in one byte. Note that the number of &lsquo;gray&rsquo; levels is stored in the &lsquo;num_grays&rsquo; field of the <a href="ft2-basic_types.html#FT_Bitmap">FT_Bitmap</a> structure (it generally is 256).</p>
</td></tr>
<tr><td class="val" id="FT_PIXEL_MODE_GRAY2">FT_PIXEL_MODE_GRAY2</td><td class="desc">
<p>A 2-bit per pixel bitmap, used to represent embedded anti-aliased bitmaps in font files according to the OpenType specification. We haven't found a single font using this format, however.</p>
</td></tr>
<tr><td class="val" id="FT_PIXEL_MODE_GRAY4">FT_PIXEL_MODE_GRAY4</td><td class="desc">
<p>A 4-bit per pixel bitmap, representing embedded anti-aliased bitmaps in font files according to the OpenType specification. We haven't found a single font using this format, however.</p>
</td></tr>
<tr><td class="val" id="FT_PIXEL_MODE_LCD">FT_PIXEL_MODE_LCD</td><td class="desc">
<p>An 8-bit bitmap, representing RGB or BGR decimated glyph images used for display on LCD displays; the bitmap is three times wider than the original glyph image. See also <a href="ft2-base_interface.html#FT_Render_Mode">FT_RENDER_MODE_LCD</a>.</p>
</td></tr>
<tr><td class="val" id="FT_PIXEL_MODE_LCD_V">FT_PIXEL_MODE_LCD_V</td><td class="desc">
<p>An 8-bit bitmap, representing RGB or BGR decimated glyph images used for display on rotated LCD displays; the bitmap is three times taller than the original glyph image. See also <a href="ft2-base_interface.html#FT_Render_Mode">FT_RENDER_MODE_LCD_V</a>.</p>
</td></tr>
<tr><td class="val" id="FT_PIXEL_MODE_BGRA">FT_PIXEL_MODE_BGRA</td><td class="desc">
<p>An image with four 8-bit channels per pixel, representing a color image (such as emoticons) with alpha channel. For each pixel, the format is BGRA, which means, the blue channel comes first in memory. The color channels are pre-multiplied and in the sRGB colorspace. For example, full red at half-translucent opacity will be represented as &lsquo;00,00,80,80&rsquo;, not &lsquo;00,00,FF,80&rsquo;. See also <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_COLOR</a>.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Glyph_Format">FT_Glyph_Format</h3>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">enum</span> FT_Glyph_Format_
{
<a href="ft2-basic_types.html#FT_IMAGE_TAG">FT_IMAGE_TAG</a>( <a href="ft2-basic_types.html#FT_GLYPH_FORMAT_NONE">FT_GLYPH_FORMAT_NONE</a>, 0, 0, 0, 0 ),
<a href="ft2-basic_types.html#FT_IMAGE_TAG">FT_IMAGE_TAG</a>( <a href="ft2-basic_types.html#FT_GLYPH_FORMAT_COMPOSITE">FT_GLYPH_FORMAT_COMPOSITE</a>, 'c', 'o', 'm', 'p' ),
<a href="ft2-basic_types.html#FT_IMAGE_TAG">FT_IMAGE_TAG</a>( <a href="ft2-basic_types.html#FT_GLYPH_FORMAT_BITMAP">FT_GLYPH_FORMAT_BITMAP</a>, 'b', 'i', 't', 's' ),
<a href="ft2-basic_types.html#FT_IMAGE_TAG">FT_IMAGE_TAG</a>( <a href="ft2-basic_types.html#FT_GLYPH_FORMAT_OUTLINE">FT_GLYPH_FORMAT_OUTLINE</a>, 'o', 'u', 't', 'l' ),
<a href="ft2-basic_types.html#FT_IMAGE_TAG">FT_IMAGE_TAG</a>( <a href="ft2-basic_types.html#FT_GLYPH_FORMAT_PLOTTER">FT_GLYPH_FORMAT_PLOTTER</a>, 'p', 'l', 'o', 't' )
} <b>FT_Glyph_Format</b>;
/* these constants are deprecated; use the corresponding */
/* `<b>FT_Glyph_Format</b>' values instead. */
#define ft_glyph_format_none <a href="ft2-basic_types.html#FT_GLYPH_FORMAT_NONE">FT_GLYPH_FORMAT_NONE</a>
#define ft_glyph_format_composite <a href="ft2-basic_types.html#FT_GLYPH_FORMAT_COMPOSITE">FT_GLYPH_FORMAT_COMPOSITE</a>
#define ft_glyph_format_bitmap <a href="ft2-basic_types.html#FT_GLYPH_FORMAT_BITMAP">FT_GLYPH_FORMAT_BITMAP</a>
#define ft_glyph_format_outline <a href="ft2-basic_types.html#FT_GLYPH_FORMAT_OUTLINE">FT_GLYPH_FORMAT_OUTLINE</a>
#define ft_glyph_format_plotter <a href="ft2-basic_types.html#FT_GLYPH_FORMAT_PLOTTER">FT_GLYPH_FORMAT_PLOTTER</a>
</pre>
<p>An enumeration type used to describe the format of a given glyph image. Note that this version of FreeType only supports two image formats, even though future font drivers will be able to register their own format.</p>
<h4>values</h4>
<table class="fields">
<tr><td class="val" id="FT_GLYPH_FORMAT_NONE">FT_GLYPH_FORMAT_NONE</td><td class="desc">
<p>The value&nbsp;0 is reserved.</p>
</td></tr>
<tr><td class="val" id="FT_GLYPH_FORMAT_COMPOSITE">FT_GLYPH_FORMAT_COMPOSITE</td><td class="desc">
<p>The glyph image is a composite of several other images. This format is <i>only</i> used with <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_NO_RECURSE</a>, and is used to report compound glyphs (like accented characters).</p>
</td></tr>
<tr><td class="val" id="FT_GLYPH_FORMAT_BITMAP">FT_GLYPH_FORMAT_BITMAP</td><td class="desc">
<p>The glyph image is a bitmap, and can be described as an <a href="ft2-basic_types.html#FT_Bitmap">FT_Bitmap</a>. You generally need to access the &lsquo;bitmap&rsquo; field of the <a href="ft2-base_interface.html#FT_GlyphSlotRec">FT_GlyphSlotRec</a> structure to read it.</p>
</td></tr>
<tr><td class="val" id="FT_GLYPH_FORMAT_OUTLINE">FT_GLYPH_FORMAT_OUTLINE</td><td class="desc">
<p>The glyph image is a vectorial outline made of line segments and Bézier arcs; it can be described as an <a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a>; you generally want to access the &lsquo;outline&rsquo; field of the <a href="ft2-base_interface.html#FT_GlyphSlotRec">FT_GlyphSlotRec</a> structure to read it.</p>
</td></tr>
<tr><td class="val" id="FT_GLYPH_FORMAT_PLOTTER">FT_GLYPH_FORMAT_PLOTTER</td><td class="desc">
<p>The glyph image is a vectorial path with no inside and outside contours. Some Type&nbsp;1 fonts, like those in the Hershey family, contain glyphs in this format. These are described as <a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a>, but FreeType isn't currently capable of rendering them correctly.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_IMAGE_TAG">FT_IMAGE_TAG</h3>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<pre>
#ifndef <b>FT_IMAGE_TAG</b>
#define <b>FT_IMAGE_TAG</b>( value, _x1, _x2, _x3, _x4 ) \
value = ( ( (<span class="keyword">unsigned</span> <span class="keyword">long</span>)_x1 &lt;&lt; 24 ) | \
( (<span class="keyword">unsigned</span> <span class="keyword">long</span>)_x2 &lt;&lt; 16 ) | \
( (<span class="keyword">unsigned</span> <span class="keyword">long</span>)_x3 &lt;&lt; 8 ) | \
(<span class="keyword">unsigned</span> <span class="keyword">long</span>)_x4 )
#endif /* <b>FT_IMAGE_TAG</b> */
</pre>
<p>This macro converts four-letter tags to an unsigned long type.</p>
<h4>note</h4>
<p>Since many 16-bit compilers don't like 32-bit enumerations, you should redefine this macro in case of problems to something like this:</p>
<pre class="colored">
#define FT_IMAGE_TAG( value, _x1, _x2, _x3, _x4 ) value
</pre>
<p>to get a simple enumeration without assigning special numbers.</p>
<hr>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="bdf_fonts">BDF and PCF Files</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#BDF_PropertyType">BDF_PropertyType</a></td><td><a href="#BDF_PropertyRec">BDF_PropertyRec</a></td><td><a href="#FT_Get_BDF_Property">FT_Get_BDF_Property</a></td></tr>
<tr><td><a href="#BDF_Property">BDF_Property</a></td><td><a href="#FT_Get_BDF_Charset_ID">FT_Get_BDF_Charset_ID</a></td><td></td></tr>
</table>
<p>This section contains the declaration of functions specific to BDF and PCF fonts.</p>
<div class="section">
<h3 id="BDF_PropertyType">BDF_PropertyType</h3>
<p>Defined in FT_BDF_H (freetype/ftbdf.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">enum</span> BDF_PropertyType_
{
<a href="ft2-bdf_fonts.html#BDF_PROPERTY_TYPE_NONE">BDF_PROPERTY_TYPE_NONE</a> = 0,
<a href="ft2-bdf_fonts.html#BDF_PROPERTY_TYPE_ATOM">BDF_PROPERTY_TYPE_ATOM</a> = 1,
<a href="ft2-bdf_fonts.html#BDF_PROPERTY_TYPE_INTEGER">BDF_PROPERTY_TYPE_INTEGER</a> = 2,
<a href="ft2-bdf_fonts.html#BDF_PROPERTY_TYPE_CARDINAL">BDF_PROPERTY_TYPE_CARDINAL</a> = 3
} <b>BDF_PropertyType</b>;
</pre>
<p>A list of BDF property types.</p>
<h4>values</h4>
<table class="fields">
<tr><td class="val" id="BDF_PROPERTY_TYPE_NONE">BDF_PROPERTY_TYPE_NONE</td><td class="desc">
<p>Value&nbsp;0 is used to indicate a missing property.</p>
</td></tr>
<tr><td class="val" id="BDF_PROPERTY_TYPE_ATOM">BDF_PROPERTY_TYPE_ATOM</td><td class="desc">
<p>Property is a string atom.</p>
</td></tr>
<tr><td class="val" id="BDF_PROPERTY_TYPE_INTEGER">BDF_PROPERTY_TYPE_INTEGER</td><td class="desc">
<p>Property is a 32-bit signed integer.</p>
</td></tr>
<tr><td class="val" id="BDF_PROPERTY_TYPE_CARDINAL">BDF_PROPERTY_TYPE_CARDINAL</td><td class="desc">
<p>Property is a 32-bit unsigned integer.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="BDF_Property">BDF_Property</h3>
<p>Defined in FT_BDF_H (freetype/ftbdf.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> BDF_PropertyRec_* <b>BDF_Property</b>;
</pre>
<p>A handle to a <a href="ft2-bdf_fonts.html#BDF_PropertyRec">BDF_PropertyRec</a> structure to model a given BDF/PCF property.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="BDF_PropertyRec">BDF_PropertyRec</h3>
<p>Defined in FT_BDF_H (freetype/ftbdf.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> BDF_PropertyRec_
{
<a href="ft2-bdf_fonts.html#BDF_PropertyType">BDF_PropertyType</a> type;
<span class="keyword">union</span> {
<span class="keyword">const</span> <span class="keyword">char</span>* atom;
<a href="ft2-basic_types.html#FT_Int32">FT_Int32</a> integer;
<a href="ft2-basic_types.html#FT_UInt32">FT_UInt32</a> cardinal;
} u;
} <b>BDF_PropertyRec</b>;
</pre>
<p>This structure models a given BDF/PCF property.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="type">type</td><td class="desc">
<p>The property type.</p>
</td></tr>
<tr><td class="val" id="u.atom">u.atom</td><td class="desc">
<p>The atom string, if type is <a href="ft2-bdf_fonts.html#BDF_PropertyType">BDF_PROPERTY_TYPE_ATOM</a>. May be NULL, indicating an empty string.</p>
</td></tr>
<tr><td class="val" id="u.integer">u.integer</td><td class="desc">
<p>A signed integer, if type is <a href="ft2-bdf_fonts.html#BDF_PropertyType">BDF_PROPERTY_TYPE_INTEGER</a>.</p>
</td></tr>
<tr><td class="val" id="u.cardinal">u.cardinal</td><td class="desc">
<p>An unsigned integer, if type is <a href="ft2-bdf_fonts.html#BDF_PropertyType">BDF_PROPERTY_TYPE_CARDINAL</a>.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Get_BDF_Charset_ID">FT_Get_BDF_Charset_ID</h3>
<p>Defined in FT_BDF_H (freetype/ftbdf.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Get_BDF_Charset_ID</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<span class="keyword">const</span> <span class="keyword">char</span>* *acharset_encoding,
<span class="keyword">const</span> <span class="keyword">char</span>* *acharset_registry );
</pre>
<p>Retrieve a BDF font character set identity, according to the BDF specification.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to the input face.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="acharset_encoding">acharset_encoding</td><td class="desc">
<p>Charset encoding, as a C&nbsp;string, owned by the face.</p>
</td></tr>
<tr><td class="val" id="acharset_registry">acharset_registry</td><td class="desc">
<p>Charset registry, as a C&nbsp;string, owned by the face.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>This function only works with BDF faces, returning an error otherwise.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Get_BDF_Property">FT_Get_BDF_Property</h3>
<p>Defined in FT_BDF_H (freetype/ftbdf.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Get_BDF_Property</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<span class="keyword">const</span> <span class="keyword">char</span>* prop_name,
<a href="ft2-bdf_fonts.html#BDF_PropertyRec">BDF_PropertyRec</a> *aproperty );
</pre>
<p>Retrieve a BDF property from a BDF or PCF font file.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to the input face.</p>
</td></tr>
<tr><td class="val" id="name">name</td><td class="desc">
<p>The property name.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="aproperty">aproperty</td><td class="desc">
<p>The property.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>This function works with BDF <i>and</i> PCF fonts. It returns an error otherwise. It also returns an error if the property is not in the font.</p>
<p>A &lsquo;property&rsquo; is a either key-value pair within the STARTPROPERTIES ... ENDPROPERTIES block of a BDF font or a key-value pair from the &lsquo;info-&gt;props&rsquo; array within a &lsquo;FontRec&rsquo; structure of a PCF font.</p>
<p>Integer properties are always stored as &lsquo;signed&rsquo; within PCF fonts; consequently, <a href="ft2-bdf_fonts.html#BDF_PropertyType">BDF_PROPERTY_TYPE_CARDINAL</a> is a possible return value for BDF fonts only.</p>
<p>In case of error, &lsquo;aproperty-&gt;type&rsquo; is always set to <a href="ft2-bdf_fonts.html#BDF_PropertyType">BDF_PROPERTY_TYPE_NONE</a>.</p>
<hr>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="bitmap_handling">Bitmap Handling</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_Bitmap_Init">FT_Bitmap_Init</a></td><td><a href="#FT_Bitmap_Embolden">FT_Bitmap_Embolden</a></td><td><a href="#FT_GlyphSlot_Own_Bitmap">FT_GlyphSlot_Own_Bitmap</a></td></tr>
<tr><td><a href="#FT_Bitmap_Copy">FT_Bitmap_Copy</a></td><td><a href="#FT_Bitmap_Convert">FT_Bitmap_Convert</a></td><td><a href="#FT_Bitmap_Done">FT_Bitmap_Done</a></td></tr>
</table>
<p>This section contains functions for handling <a href="ft2-basic_types.html#FT_Bitmap">FT_Bitmap</a> objects. Note that none of the functions changes the bitmap's &lsquo;flow&rsquo; (as indicated by the sign of the &lsquo;pitch&rsquo; field in &lsquo;FT_Bitmap&rsquo;).</p>
<div class="section">
<h3 id="FT_Bitmap_Init">FT_Bitmap_Init</h3>
<p>Defined in FT_BITMAP_H (freetype/ftbitmap.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_Bitmap_Init</b>( <a href="ft2-basic_types.html#FT_Bitmap">FT_Bitmap</a> *abitmap );
/* deprecated */
FT_EXPORT( <span class="keyword">void</span> )
FT_Bitmap_New( <a href="ft2-basic_types.html#FT_Bitmap">FT_Bitmap</a> *abitmap );
</pre>
<p>Initialize a pointer to an <a href="ft2-basic_types.html#FT_Bitmap">FT_Bitmap</a> structure.</p>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="abitmap">abitmap</td><td class="desc">
<p>A pointer to the bitmap structure.</p>
</td></tr>
</table>
<h4>note</h4>
<p>A deprecated name for the same function is &lsquo;FT_Bitmap_New&rsquo;.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Bitmap_Copy">FT_Bitmap_Copy</h3>
<p>Defined in FT_BITMAP_H (freetype/ftbitmap.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Bitmap_Copy</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library,
<span class="keyword">const</span> <a href="ft2-basic_types.html#FT_Bitmap">FT_Bitmap</a> *source,
<a href="ft2-basic_types.html#FT_Bitmap">FT_Bitmap</a> *target);
</pre>
<p>Copy a bitmap into another one.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="library">library</td><td class="desc">
<p>A handle to a library object.</p>
</td></tr>
<tr><td class="val" id="source">source</td><td class="desc">
<p>A handle to the source bitmap.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="target">target</td><td class="desc">
<p>A handle to the target bitmap.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Bitmap_Embolden">FT_Bitmap_Embolden</h3>
<p>Defined in FT_BITMAP_H (freetype/ftbitmap.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Bitmap_Embolden</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library,
<a href="ft2-basic_types.html#FT_Bitmap">FT_Bitmap</a>* bitmap,
<a href="ft2-basic_types.html#FT_Pos">FT_Pos</a> xStrength,
<a href="ft2-basic_types.html#FT_Pos">FT_Pos</a> yStrength );
</pre>
<p>Embolden a bitmap. The new bitmap will be about &lsquo;xStrength&rsquo; pixels wider and &lsquo;yStrength&rsquo; pixels higher. The left and bottom borders are kept unchanged.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="library">library</td><td class="desc">
<p>A handle to a library object.</p>
</td></tr>
<tr><td class="val" id="xStrength">xStrength</td><td class="desc">
<p>How strong the glyph is emboldened horizontally. Expressed in 26.6 pixel format.</p>
</td></tr>
<tr><td class="val" id="yStrength">yStrength</td><td class="desc">
<p>How strong the glyph is emboldened vertically. Expressed in 26.6 pixel format.</p>
</td></tr>
</table>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="bitmap">bitmap</td><td class="desc">
<p>A handle to the target bitmap.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>The current implementation restricts &lsquo;xStrength&rsquo; to be less than or equal to&nbsp;8 if bitmap is of pixel_mode <a href="ft2-basic_types.html#FT_Pixel_Mode">FT_PIXEL_MODE_MONO</a>.</p>
<p>If you want to embolden the bitmap owned by a <a href="ft2-base_interface.html#FT_GlyphSlotRec">FT_GlyphSlotRec</a>, you should call <a href="ft2-bitmap_handling.html#FT_GlyphSlot_Own_Bitmap">FT_GlyphSlot_Own_Bitmap</a> on the slot first.</p>
<p>Bitmaps in <a href="ft2-basic_types.html#FT_Pixel_Mode">FT_PIXEL_MODE_GRAY2</a> and <a href="ft2-basic_types.html#FT_Pixel_Mode">FT_PIXEL_MODE_GRAY</a>@ format are converted to <a href="ft2-basic_types.html#FT_Pixel_Mode">FT_PIXEL_MODE_GRAY</a> format (i.e., 8bpp).</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Bitmap_Convert">FT_Bitmap_Convert</h3>
<p>Defined in FT_BITMAP_H (freetype/ftbitmap.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Bitmap_Convert</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library,
<span class="keyword">const</span> <a href="ft2-basic_types.html#FT_Bitmap">FT_Bitmap</a> *source,
<a href="ft2-basic_types.html#FT_Bitmap">FT_Bitmap</a> *target,
<a href="ft2-basic_types.html#FT_Int">FT_Int</a> alignment );
</pre>
<p>Convert a bitmap object with depth 1bpp, 2bpp, 4bpp, 8bpp or 32bpp to a bitmap object with depth 8bpp, making the number of used bytes line (a.k.a. the &lsquo;pitch&rsquo;) a multiple of &lsquo;alignment&rsquo;.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="library">library</td><td class="desc">
<p>A handle to a library object.</p>
</td></tr>
<tr><td class="val" id="source">source</td><td class="desc">
<p>The source bitmap.</p>
</td></tr>
<tr><td class="val" id="alignment">alignment</td><td class="desc">
<p>The pitch of the bitmap is a multiple of this parameter. Common values are 1, 2, or 4.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="target">target</td><td class="desc">
<p>The target bitmap.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>It is possible to call <a href="ft2-bitmap_handling.html#FT_Bitmap_Convert">FT_Bitmap_Convert</a> multiple times without calling <a href="ft2-bitmap_handling.html#FT_Bitmap_Done">FT_Bitmap_Done</a> (the memory is simply reallocated).</p>
<p>Use <a href="ft2-bitmap_handling.html#FT_Bitmap_Done">FT_Bitmap_Done</a> to finally remove the bitmap object.</p>
<p>The &lsquo;library&rsquo; argument is taken to have access to FreeType's memory handling functions.</p>
<hr>
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<div class="section">
<h3 id="FT_GlyphSlot_Own_Bitmap">FT_GlyphSlot_Own_Bitmap</h3>
<p>Defined in FT_BITMAP_H (freetype/ftbitmap.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_GlyphSlot_Own_Bitmap</b>( <a href="ft2-base_interface.html#FT_GlyphSlot">FT_GlyphSlot</a> slot );
</pre>
<p>Make sure that a glyph slot owns &lsquo;slot-&gt;bitmap&rsquo;.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="slot">slot</td><td class="desc">
<p>The glyph slot.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>This function is to be used in combination with <a href="ft2-bitmap_handling.html#FT_Bitmap_Embolden">FT_Bitmap_Embolden</a>.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Bitmap_Done">FT_Bitmap_Done</h3>
<p>Defined in FT_BITMAP_H (freetype/ftbitmap.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Bitmap_Done</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library,
<a href="ft2-basic_types.html#FT_Bitmap">FT_Bitmap</a> *bitmap );
</pre>
<p>Destroy a bitmap object initialized with <a href="ft2-bitmap_handling.html#FT_Bitmap_Init">FT_Bitmap_Init</a>.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="library">library</td><td class="desc">
<p>A handle to a library object.</p>
</td></tr>
<tr><td class="val" id="bitmap">bitmap</td><td class="desc">
<p>The bitmap object to be freed.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>The &lsquo;library&rsquo; argument is taken to have access to FreeType's memory handling functions.</p>
<hr>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="bzip2">BZIP2 Streams</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_Stream_OpenBzip2">FT_Stream_OpenBzip2</a></td><td></td><td></td></tr>
</table>
<p>This section contains the declaration of Bzip2-specific functions.</p>
<div class="section">
<h3 id="FT_Stream_OpenBzip2">FT_Stream_OpenBzip2</h3>
<p>Defined in FT_BZIP2_H (freetype/ftbzip2.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Stream_OpenBzip2</b>( <a href="ft2-system_interface.html#FT_Stream">FT_Stream</a> stream,
<a href="ft2-system_interface.html#FT_Stream">FT_Stream</a> source );
</pre>
<p>Open a new stream to parse bzip2-compressed font files. This is mainly used to support the compressed &lsquo;*.pcf.bz2&rsquo; fonts that come with XFree86.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="stream">stream</td><td class="desc">
<p>The target embedding stream.</p>
</td></tr>
<tr><td class="val" id="source">source</td><td class="desc">
<p>The source stream.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>The source stream must be opened <i>before</i> calling this function.</p>
<p>Calling the internal function &lsquo;FT_Stream_Close&rsquo; on the new stream will <b>not</b> call &lsquo;FT_Stream_Close&rsquo; on the source stream. None of the stream objects will be released to the heap.</p>
<p>The stream implementation is very basic and resets the decompression process each time seeking backwards is needed within the stream.</p>
<p>In certain builds of the library, bzip2 compression recognition is automatically handled when calling <a href="ft2-base_interface.html#FT_New_Face">FT_New_Face</a> or <a href="ft2-base_interface.html#FT_Open_Face">FT_Open_Face</a>. This means that if no font driver is capable of handling the raw compressed file, the library will try to open a bzip2 compressed stream from it and re-open the face with it.</p>
<p>This function may return &lsquo;FT_Err_Unimplemented_Feature&rsquo; if your build of FreeType was not compiled with bzip2 support.</p>
<hr>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="cff_driver">The CFF driver</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#hinting-engine(cff)">hinting-engine</a></td><td>&nbsp;</td></tr>
<tr><td><a href="#no-stem-darkening(cff)">no-stem-darkening</a></td><td><a href="#FT_CFF_HINTING_XXX">FT_CFF_HINTING_XXX</a></td></tr>
<tr><td><a href="#darkening-parameters(cff)">darkening-parameters</a></td><td><a href="#FT_PARAM_TAG_RANDOM_SEED">FT_PARAM_TAG_RANDOM_SEED</a></td></tr>
<tr><td><a href="#random-seed">random-seed</a></td><td></td></tr>
</table>
<p>While FreeType's CFF driver doesn't expose API functions by itself, it is possible to control its behaviour with <a href="ft2-module_management.html#FT_Property_Set">FT_Property_Set</a> and <a href="ft2-module_management.html#FT_Property_Get">FT_Property_Get</a>. The list below gives the available properties together with the necessary macros and structures.</p>
<p>The CFF driver's module name is &lsquo;cff&rsquo;.</p>
<p><b>Hinting</b> <b>and</b> <b>antialiasing</b> <b>principles</b> <b>of</b> <b>the</b> <b>new</b> <b>engine</b></p>
<p>The rasterizer is positioning horizontal features (e.g., ascender height &amp; x-height, or crossbars) on the pixel grid and minimizing the amount of antialiasing applied to them, while placing vertical features (vertical stems) on the pixel grid without hinting, thus representing the stem position and weight accurately. Sometimes the vertical stems may be only partially black. In this context, &lsquo;antialiasing&rsquo; means that stems are not positioned exactly on pixel borders, causing a fuzzy appearance.</p>
<p>There are two principles behind this approach.</p>
<p>1) No hinting in the horizontal direction: Unlike &lsquo;superhinted&rsquo; TrueType, which changes glyph widths to accommodate regular inter-glyph spacing, Adobe's approach is &lsquo;faithful to the design&rsquo; in representing both the glyph width and the inter-glyph spacing designed for the font. This makes the screen display as close as it can be to the result one would get with infinite resolution, while preserving what is considered the key characteristics of each glyph. Note that the distances between unhinted and grid-fitted positions at small sizes are comparable to kerning values and thus would be noticeable (and distracting) while reading if hinting were applied.</p>
<p>One of the reasons to not hint horizontally is antialiasing for LCD screens: The pixel geometry of modern displays supplies three vertical sub-pixels as the eye moves horizontally across each visible pixel. On devices where we can be certain this characteristic is present a rasterizer can take advantage of the sub-pixels to add increments of weight. In Western writing systems this turns out to be the more critical direction anyway; the weights and spacing of vertical stems (see above) are central to Armenian, Cyrillic, Greek, and Latin type designs. Even when the rasterizer uses greyscale antialiasing instead of color (a necessary compromise when one doesn't know the screen characteristics), the unhinted vertical features preserve the design's weight and spacing much better than aliased type would.</p>
<p>2) Alignment in the vertical direction: Weights and spacing along the y&nbsp;axis are less critical; what is much more important is the visual alignment of related features (like cap-height and x-height). The sense of alignment for these is enhanced by the sharpness of grid-fit edges, while the cruder vertical resolution (full pixels instead of 1/3 pixels) is less of a problem.</p>
<p>On the technical side, horizontal alignment zones for ascender, x-height, and other important height values (traditionally called &lsquo;blue zones&rsquo;) as defined in the font are positioned independently, each being rounded to the nearest pixel edge, taking care of overshoot suppression at small sizes, stem darkening, and scaling.</p>
<p>Hstems (this is, hint values defined in the font to help align horizontal features) that fall within a blue zone are said to be &lsquo;captured&rsquo; and are aligned to that zone. Uncaptured stems are moved in one of four ways, top edge up or down, bottom edge up or down. Unless there are conflicting hstems, the smallest movement is taken to minimize distortion.</p>
<div class="section">
<h3 id="hinting-engine(cff)">hinting-engine</h3>
<p>Thanks to Adobe, which contributed a new hinting (and parsing) engine, an application can select between &lsquo;freetype&rsquo; and &lsquo;adobe&rsquo; if compiled with CFF_CONFIG_OPTION_OLD_ENGINE. If this configuration macro isn't defined, &lsquo;hinting-engine&rsquo; does nothing.</p>
<p>The default engine is &lsquo;freetype&rsquo; if CFF_CONFIG_OPTION_OLD_ENGINE is defined, and &lsquo;adobe&rsquo; otherwise.</p>
<p>The following example code demonstrates how to select Adobe's hinting engine (omitting the error handling).</p>
<pre class="colored">
FT_Library library;
FT_UInt hinting_engine = FT_CFF_HINTING_ADOBE;
FT_Init_FreeType( &amp;library );
FT_Property_Set( library, "cff",
"hinting-engine", &amp;hinting_engine );
</pre>
<h4>note</h4>
<p>This property can be used with <a href="ft2-module_management.html#FT_Property_Get">FT_Property_Get</a> also.</p>
<p>This property can be set via the &lsquo;FREETYPE_PROPERTIES&rsquo; environment variable (using values &lsquo;adobe&rsquo; or &lsquo;freetype&rsquo;).</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="no-stem-darkening(cff)">no-stem-darkening</h3>
<p>By default, the Adobe CFF engine darkens stems at smaller sizes, regardless of hinting, to enhance contrast. This feature requires a rendering system with proper gamma correction. Setting this property, stem darkening gets switched off.</p>
<p>Note that stem darkening is never applied if <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_NO_SCALE</a> is set.</p>
<pre class="colored">
FT_Library library;
FT_Bool no_stem_darkening = TRUE;
FT_Init_FreeType( &amp;library );
FT_Property_Set( library, "cff",
"no-stem-darkening", &amp;no_stem_darkening );
</pre>
<h4>note</h4>
<p>This property can be used with <a href="ft2-module_management.html#FT_Property_Get">FT_Property_Get</a> also.</p>
<p>This property can be set via the &lsquo;FREETYPE_PROPERTIES&rsquo; environment variable (using values 1 and 0 for &lsquo;on&rsquo; and &lsquo;off&rsquo;, respectively). It can also be set per face using <a href="ft2-base_interface.html#FT_Face_Properties">FT_Face_Properties</a> with <a href="ft2-auto_hinter.html#FT_PARAM_TAG_STEM_DARKENING">FT_PARAM_TAG_STEM_DARKENING</a>.</p>
<hr>
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<div class="section">
<h3 id="darkening-parameters(cff)">darkening-parameters</h3>
<p>By default, the Adobe CFF engine darkens stems as follows (if the &lsquo;no-stem-darkening&rsquo; property isn't set):</p>
<pre class="colored">
stem width &lt;= 0.5px: darkening amount = 0.4px
stem width = 1px: darkening amount = 0.275px
stem width = 1.667px: darkening amount = 0.275px
stem width &gt;= 2.333px: darkening amount = 0px
</pre>
<p>and piecewise linear in-between. At configuration time, these four control points can be set with the macro &lsquo;CFF_CONFIG_OPTION_DARKENING_PARAMETERS&rsquo;. At runtime, the control points can be changed using the &lsquo;darkening-parameters&rsquo; property, as the following example demonstrates.</p>
<pre class="colored">
FT_Library library;
FT_Int darken_params[8] = { 500, 300, // x1, y1
1000, 200, // x2, y2
1500, 100, // x3, y3
2000, 0 }; // x4, y4
FT_Init_FreeType( &amp;library );
FT_Property_Set( library, "cff",
"darkening-parameters", darken_params );
</pre>
<p>The x&nbsp;values give the stem width, and the y&nbsp;values the darkening amount. The unit is 1000th of pixels. All coordinate values must be positive; the x&nbsp;values must be monotonically increasing; the y&nbsp;values must be monotonically decreasing and smaller than or equal to 500 (corresponding to half a pixel); the slope of each linear piece must be shallower than -1 (e.g., -.4).</p>
<h4>note</h4>
<p>This property can be used with <a href="ft2-module_management.html#FT_Property_Get">FT_Property_Get</a> also.</p>
<p>This property can be set via the &lsquo;FREETYPE_PROPERTIES&rsquo; environment variable, using eight comma-separated integers without spaces. Here the above example, using &lsquo;\&rsquo; to break the line for readability.</p>
<pre class="colored">
FREETYPE_PROPERTIES=\
cff:darkening-parameters=500,300,1000,200,1500,100,2000,0
</pre>
<hr>
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<div class="section">
<h3 id="random-seed">random-seed</h3>
<p>By default, the seed value for the CFF &lsquo;random&rsquo; operator is set to a random value. However, mainly for debugging purposes, it is often necessary to use a known value as a seed so that the pseudo-random number sequences generated by &lsquo;random&rsquo; are repeatable.</p>
<p>The &lsquo;random-seed&rsquo; property does that. Its argument is a signed 32bit integer; if the value is zero or negative, the seed given by the &lsquo;intitialRandomSeed&rsquo; private DICT operator in a CFF file gets used (or a default value if there is no such operator). If the value is positive, use it instead of &lsquo;initialRandomSeed&rsquo;, which is consequently ignored.</p>
<h4>note</h4>
<p>This property can be set via the &lsquo;FREETYPE_PROPERTIES&rsquo; environment variable. It can also be set per face using <a href="ft2-base_interface.html#FT_Face_Properties">FT_Face_Properties</a> with <a href="ft2-cff_driver.html#FT_PARAM_TAG_RANDOM_SEED">FT_PARAM_TAG_RANDOM_SEED</a>.</p>
<hr>
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<div class="section">
<h3 id="FT_CFF_HINTING_XXX">FT_CFF_HINTING_XXX</h3>
<p>Defined in FT_CFF_DRIVER_H (freetype/ftcffdrv.h).</p>
<pre>
#define <a href="ft2-cff_driver.html#FT_CFF_HINTING_FREETYPE">FT_CFF_HINTING_FREETYPE</a> 0
#define <a href="ft2-cff_driver.html#FT_CFF_HINTING_ADOBE">FT_CFF_HINTING_ADOBE</a> 1
</pre>
<p>A list of constants used for the <a href="ft2-cff_driver.html#hinting-engine(cff)">hinting-engine</a> property to select the hinting engine for CFF fonts.</p>
<h4>values</h4>
<table class="fields">
<tr><td class="val" id="FT_CFF_HINTING_FREETYPE">FT_CFF_HINTING_FREETYPE</td><td class="desc">
<p>Use the old FreeType hinting engine.</p>
</td></tr>
<tr><td class="val" id="FT_CFF_HINTING_ADOBE">FT_CFF_HINTING_ADOBE</td><td class="desc">
<p>Use the hinting engine contributed by Adobe.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_PARAM_TAG_RANDOM_SEED">FT_PARAM_TAG_RANDOM_SEED</h3>
<p>Defined in FT_CFF_DRIVER_H (freetype/ftcffdrv.h).</p>
<pre>
#define <b>FT_PARAM_TAG_RANDOM_SEED</b> \
<a href="ft2-basic_types.html#FT_MAKE_TAG">FT_MAKE_TAG</a>( 's', 'e', 'e', 'd' )
</pre>
<p>An <a href="ft2-base_interface.html#FT_Parameter">FT_Parameter</a> tag to be used with <a href="ft2-base_interface.html#FT_Face_Properties">FT_Face_Properties</a>. The corresponding 32bit signed integer argument overrides the CFF module's random seed value with a face-specific one; see <a href="ft2-cff_driver.html#random-seed">random-seed</a>.</p>
<hr>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="cid_fonts">CID Fonts</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_Get_CID_Registry_Ordering_Supplement">FT_Get_CID_Registry_Ordering_Supplement</a></td></tr>
<tr><td><a href="#FT_Get_CID_Is_Internally_CID_Keyed">FT_Get_CID_Is_Internally_CID_Keyed</a></td></tr>
<tr><td><a href="#FT_Get_CID_From_Glyph_Index">FT_Get_CID_From_Glyph_Index</a></td></tr>
</table>
<p>This section contains the declaration of CID-keyed font specific functions.</p>
<div class="section">
<h3 id="FT_Get_CID_Registry_Ordering_Supplement">FT_Get_CID_Registry_Ordering_Supplement</h3>
<p>Defined in FT_CID_H (freetype/ftcid.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Get_CID_Registry_Ordering_Supplement</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<span class="keyword">const</span> <span class="keyword">char</span>* *registry,
<span class="keyword">const</span> <span class="keyword">char</span>* *ordering,
<a href="ft2-basic_types.html#FT_Int">FT_Int</a> *supplement);
</pre>
<p>Retrieve the Registry/Ordering/Supplement triple (also known as the "R/O/S") from a CID-keyed font.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to the input face.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="registry">registry</td><td class="desc">
<p>The registry, as a C&nbsp;string, owned by the face.</p>
</td></tr>
<tr><td class="val" id="ordering">ordering</td><td class="desc">
<p>The ordering, as a C&nbsp;string, owned by the face.</p>
</td></tr>
<tr><td class="val" id="supplement">supplement</td><td class="desc">
<p>The supplement.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>This function only works with CID faces, returning an error otherwise.</p>
<h4>since</h4>
<p>2.3.6</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Get_CID_Is_Internally_CID_Keyed">FT_Get_CID_Is_Internally_CID_Keyed</h3>
<p>Defined in FT_CID_H (freetype/ftcid.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Get_CID_Is_Internally_CID_Keyed</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_Bool">FT_Bool</a> *is_cid );
</pre>
<p>Retrieve the type of the input face, CID keyed or not. In contrast to the <a href="ft2-base_interface.html#FT_IS_CID_KEYED">FT_IS_CID_KEYED</a> macro this function returns successfully also for CID-keyed fonts in an SFNT wrapper.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to the input face.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="is_cid">is_cid</td><td class="desc">
<p>The type of the face as an <a href="ft2-basic_types.html#FT_Bool">FT_Bool</a>.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>This function only works with CID faces and OpenType fonts, returning an error otherwise.</p>
<h4>since</h4>
<p>2.3.9</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Get_CID_From_Glyph_Index">FT_Get_CID_From_Glyph_Index</h3>
<p>Defined in FT_CID_H (freetype/ftcid.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Get_CID_From_Glyph_Index</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> glyph_index,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> *cid );
</pre>
<p>Retrieve the CID of the input glyph index.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to the input face.</p>
</td></tr>
<tr><td class="val" id="glyph_index">glyph_index</td><td class="desc">
<p>The input glyph index.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="cid">cid</td><td class="desc">
<p>The CID as an <a href="ft2-basic_types.html#FT_UInt">FT_UInt</a>.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>This function only works with CID faces and OpenType fonts, returning an error otherwise.</p>
<h4>since</h4>
<p>2.3.9</p>
<hr>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="computations">Computations</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_MulDiv">FT_MulDiv</a></td><td>&nbsp;</td><td><a href="#FT_Atan2">FT_Atan2</a></td></tr>
<tr><td><a href="#FT_MulFix">FT_MulFix</a></td><td><a href="#FT_Angle">FT_Angle</a></td><td><a href="#FT_Angle_Diff">FT_Angle_Diff</a></td></tr>
<tr><td><a href="#FT_DivFix">FT_DivFix</a></td><td><a href="#FT_ANGLE_PI">FT_ANGLE_PI</a></td><td><a href="#FT_Vector_Unit">FT_Vector_Unit</a></td></tr>
<tr><td><a href="#FT_RoundFix">FT_RoundFix</a></td><td><a href="#FT_ANGLE_2PI">FT_ANGLE_2PI</a></td><td><a href="#FT_Vector_Rotate">FT_Vector_Rotate</a></td></tr>
<tr><td><a href="#FT_CeilFix">FT_CeilFix</a></td><td><a href="#FT_ANGLE_PI2">FT_ANGLE_PI2</a></td><td><a href="#FT_Vector_Length">FT_Vector_Length</a></td></tr>
<tr><td><a href="#FT_FloorFix">FT_FloorFix</a></td><td><a href="#FT_ANGLE_PI4">FT_ANGLE_PI4</a></td><td><a href="#FT_Vector_Polarize">FT_Vector_Polarize</a></td></tr>
<tr><td><a href="#FT_Vector_Transform">FT_Vector_Transform</a></td><td><a href="#FT_Sin">FT_Sin</a></td><td><a href="#FT_Vector_From_Polar">FT_Vector_From_Polar</a></td></tr>
<tr><td><a href="#FT_Matrix_Multiply">FT_Matrix_Multiply</a></td><td><a href="#FT_Cos">FT_Cos</a></td><td></td></tr>
<tr><td><a href="#FT_Matrix_Invert">FT_Matrix_Invert</a></td><td><a href="#FT_Tan">FT_Tan</a></td><td></td></tr>
</table>
<p>This section contains various functions used to perform computations on 16.16 fixed-float numbers or 2d vectors.</p>
<div class="section">
<h3 id="FT_MulDiv">FT_MulDiv</h3>
<p>Defined in FT_FREETYPE_H (freetype/freetype.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Long">FT_Long</a> )
<b>FT_MulDiv</b>( <a href="ft2-basic_types.html#FT_Long">FT_Long</a> a,
<a href="ft2-basic_types.html#FT_Long">FT_Long</a> b,
<a href="ft2-basic_types.html#FT_Long">FT_Long</a> c );
</pre>
<p>Compute &lsquo;(a*b)/c&rsquo; with maximum accuracy, using a 64-bit intermediate integer whenever necessary.</p>
<p>This function isn't necessarily as fast as some processor specific operations, but is at least completely portable.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="a">a</td><td class="desc">
<p>The first multiplier.</p>
</td></tr>
<tr><td class="val" id="b">b</td><td class="desc">
<p>The second multiplier.</p>
</td></tr>
<tr><td class="val" id="c">c</td><td class="desc">
<p>The divisor.</p>
</td></tr>
</table>
<h4>return</h4>
<p>The result of &lsquo;(a*b)/c&rsquo;. This function never traps when trying to divide by zero; it simply returns &lsquo;MaxInt&rsquo; or &lsquo;MinInt&rsquo; depending on the signs of &lsquo;a&rsquo; and &lsquo;b&rsquo;.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_MulFix">FT_MulFix</h3>
<p>Defined in FT_FREETYPE_H (freetype/freetype.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Long">FT_Long</a> )
<b>FT_MulFix</b>( <a href="ft2-basic_types.html#FT_Long">FT_Long</a> a,
<a href="ft2-basic_types.html#FT_Long">FT_Long</a> b );
</pre>
<p>Compute &lsquo;(a*b)/0x10000&rsquo; with maximum accuracy. Its main use is to multiply a given value by a 16.16 fixed-point factor.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="a">a</td><td class="desc">
<p>The first multiplier.</p>
</td></tr>
<tr><td class="val" id="b">b</td><td class="desc">
<p>The second multiplier. Use a 16.16 factor here whenever possible (see note below).</p>
</td></tr>
</table>
<h4>return</h4>
<p>The result of &lsquo;(a*b)/0x10000&rsquo;.</p>
<h4>note</h4>
<p>This function has been optimized for the case where the absolute value of &lsquo;a&rsquo; is less than 2048, and &lsquo;b&rsquo; is a 16.16 scaling factor. As this happens mainly when scaling from notional units to fractional pixels in FreeType, it resulted in noticeable speed improvements between versions 2.x and 1.x.</p>
<p>As a conclusion, always try to place a 16.16 factor as the <i>second</i> argument of this function; this can make a great difference.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_DivFix">FT_DivFix</h3>
<p>Defined in FT_FREETYPE_H (freetype/freetype.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Long">FT_Long</a> )
<b>FT_DivFix</b>( <a href="ft2-basic_types.html#FT_Long">FT_Long</a> a,
<a href="ft2-basic_types.html#FT_Long">FT_Long</a> b );
</pre>
<p>Compute &lsquo;(a*0x10000)/b&rsquo; with maximum accuracy. Its main use is to divide a given value by a 16.16 fixed-point factor.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="a">a</td><td class="desc">
<p>The numerator.</p>
</td></tr>
<tr><td class="val" id="b">b</td><td class="desc">
<p>The denominator. Use a 16.16 factor here.</p>
</td></tr>
</table>
<h4>return</h4>
<p>The result of &lsquo;(a*0x10000)/b&rsquo;.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_RoundFix">FT_RoundFix</h3>
<p>Defined in FT_FREETYPE_H (freetype/freetype.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> )
<b>FT_RoundFix</b>( <a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> a );
</pre>
<p>Round a 16.16 fixed number.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="a">a</td><td class="desc">
<p>The number to be rounded.</p>
</td></tr>
</table>
<h4>return</h4>
<p>&lsquo;a&rsquo; rounded to the nearest 16.16 fixed integer, halfway cases away from zero.</p>
<h4>note</h4>
<p>The function uses wrap-around arithmetic.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_CeilFix">FT_CeilFix</h3>
<p>Defined in FT_FREETYPE_H (freetype/freetype.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> )
<b>FT_CeilFix</b>( <a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> a );
</pre>
<p>Compute the smallest following integer of a 16.16 fixed number.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="a">a</td><td class="desc">
<p>The number for which the ceiling function is to be computed.</p>
</td></tr>
</table>
<h4>return</h4>
<p>&lsquo;a&rsquo; rounded towards plus infinity.</p>
<h4>note</h4>
<p>The function uses wrap-around arithmetic.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_FloorFix">FT_FloorFix</h3>
<p>Defined in FT_FREETYPE_H (freetype/freetype.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> )
<b>FT_FloorFix</b>( <a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> a );
</pre>
<p>Compute the largest previous integer of a 16.16 fixed number.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="a">a</td><td class="desc">
<p>The number for which the floor function is to be computed.</p>
</td></tr>
</table>
<h4>return</h4>
<p>&lsquo;a&rsquo; rounded towards minus infinity.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Vector_Transform">FT_Vector_Transform</h3>
<p>Defined in FT_FREETYPE_H (freetype/freetype.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_Vector_Transform</b>( <a href="ft2-basic_types.html#FT_Vector">FT_Vector</a>* vec,
<span class="keyword">const</span> <a href="ft2-basic_types.html#FT_Matrix">FT_Matrix</a>* matrix );
</pre>
<p>Transform a single vector through a 2x2 matrix.</p>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="vector">vector</td><td class="desc">
<p>The target vector to transform.</p>
</td></tr>
</table>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="matrix">matrix</td><td class="desc">
<p>A pointer to the source 2x2 matrix.</p>
</td></tr>
</table>
<h4>note</h4>
<p>The result is undefined if either &lsquo;vector&rsquo; or &lsquo;matrix&rsquo; is invalid.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Matrix_Multiply">FT_Matrix_Multiply</h3>
<p>Defined in FT_GLYPH_H (freetype/ftglyph.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_Matrix_Multiply</b>( <span class="keyword">const</span> <a href="ft2-basic_types.html#FT_Matrix">FT_Matrix</a>* a,
<a href="ft2-basic_types.html#FT_Matrix">FT_Matrix</a>* b );
</pre>
<p>Perform the matrix operation &lsquo;b = a*b&rsquo;.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="a">a</td><td class="desc">
<p>A pointer to matrix &lsquo;a&rsquo;.</p>
</td></tr>
</table>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="b">b</td><td class="desc">
<p>A pointer to matrix &lsquo;b&rsquo;.</p>
</td></tr>
</table>
<h4>note</h4>
<p>The result is undefined if either &lsquo;a&rsquo; or &lsquo;b&rsquo; is zero.</p>
<p>Since the function uses wrap-around arithmetic, results become meaningless if the arguments are very large.</p>
<hr>
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<div class="section">
<h3 id="FT_Matrix_Invert">FT_Matrix_Invert</h3>
<p>Defined in FT_GLYPH_H (freetype/ftglyph.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Matrix_Invert</b>( <a href="ft2-basic_types.html#FT_Matrix">FT_Matrix</a>* matrix );
</pre>
<p>Invert a 2x2 matrix. Return an error if it can't be inverted.</p>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="matrix">matrix</td><td class="desc">
<p>A pointer to the target matrix. Remains untouched in case of error.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Angle">FT_Angle</h3>
<p>Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).</p>
<pre>
<span class="keyword">typedef</span> <a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> <b>FT_Angle</b>;
</pre>
<p>This type is used to model angle values in FreeType. Note that the angle is a 16.16 fixed-point value expressed in degrees.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_ANGLE_PI">FT_ANGLE_PI</h3>
<p>Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).</p>
<pre>
#define <b>FT_ANGLE_PI</b> ( 180L &lt;&lt; 16 )
</pre>
<p>The angle pi expressed in <a href="ft2-computations.html#FT_Angle">FT_Angle</a> units.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_ANGLE_2PI">FT_ANGLE_2PI</h3>
<p>Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).</p>
<pre>
#define <b>FT_ANGLE_2PI</b> ( <a href="ft2-computations.html#FT_ANGLE_PI">FT_ANGLE_PI</a> * 2 )
</pre>
<p>The angle 2*pi expressed in <a href="ft2-computations.html#FT_Angle">FT_Angle</a> units.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_ANGLE_PI2">FT_ANGLE_PI2</h3>
<p>Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).</p>
<pre>
#define <b>FT_ANGLE_PI2</b> ( <a href="ft2-computations.html#FT_ANGLE_PI">FT_ANGLE_PI</a> / 2 )
</pre>
<p>The angle pi/2 expressed in <a href="ft2-computations.html#FT_Angle">FT_Angle</a> units.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_ANGLE_PI4">FT_ANGLE_PI4</h3>
<p>Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).</p>
<pre>
#define <b>FT_ANGLE_PI4</b> ( <a href="ft2-computations.html#FT_ANGLE_PI">FT_ANGLE_PI</a> / 4 )
</pre>
<p>The angle pi/4 expressed in <a href="ft2-computations.html#FT_Angle">FT_Angle</a> units.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Sin">FT_Sin</h3>
<p>Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> )
<b>FT_Sin</b>( <a href="ft2-computations.html#FT_Angle">FT_Angle</a> angle );
</pre>
<p>Return the sinus of a given angle in fixed-point format.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="angle">angle</td><td class="desc">
<p>The input angle.</p>
</td></tr>
</table>
<h4>return</h4>
<p>The sinus value.</p>
<h4>note</h4>
<p>If you need both the sinus and cosinus for a given angle, use the function <a href="ft2-computations.html#FT_Vector_Unit">FT_Vector_Unit</a>.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Cos">FT_Cos</h3>
<p>Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> )
<b>FT_Cos</b>( <a href="ft2-computations.html#FT_Angle">FT_Angle</a> angle );
</pre>
<p>Return the cosinus of a given angle in fixed-point format.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="angle">angle</td><td class="desc">
<p>The input angle.</p>
</td></tr>
</table>
<h4>return</h4>
<p>The cosinus value.</p>
<h4>note</h4>
<p>If you need both the sinus and cosinus for a given angle, use the function <a href="ft2-computations.html#FT_Vector_Unit">FT_Vector_Unit</a>.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Tan">FT_Tan</h3>
<p>Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> )
<b>FT_Tan</b>( <a href="ft2-computations.html#FT_Angle">FT_Angle</a> angle );
</pre>
<p>Return the tangent of a given angle in fixed-point format.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="angle">angle</td><td class="desc">
<p>The input angle.</p>
</td></tr>
</table>
<h4>return</h4>
<p>The tangent value.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Atan2">FT_Atan2</h3>
<p>Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).</p>
<pre>
FT_EXPORT( <a href="ft2-computations.html#FT_Angle">FT_Angle</a> )
<b>FT_Atan2</b>( <a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> x,
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> y );
</pre>
<p>Return the arc-tangent corresponding to a given vector (x,y) in the 2d plane.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="x">x</td><td class="desc">
<p>The horizontal vector coordinate.</p>
</td></tr>
<tr><td class="val" id="y">y</td><td class="desc">
<p>The vertical vector coordinate.</p>
</td></tr>
</table>
<h4>return</h4>
<p>The arc-tangent value (i.e. angle).</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Angle_Diff">FT_Angle_Diff</h3>
<p>Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).</p>
<pre>
FT_EXPORT( <a href="ft2-computations.html#FT_Angle">FT_Angle</a> )
<b>FT_Angle_Diff</b>( <a href="ft2-computations.html#FT_Angle">FT_Angle</a> angle1,
<a href="ft2-computations.html#FT_Angle">FT_Angle</a> angle2 );
</pre>
<p>Return the difference between two angles. The result is always constrained to the ]-PI..PI] interval.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="angle1">angle1</td><td class="desc">
<p>First angle.</p>
</td></tr>
<tr><td class="val" id="angle2">angle2</td><td class="desc">
<p>Second angle.</p>
</td></tr>
</table>
<h4>return</h4>
<p>Constrained value of &lsquo;value2-value1&rsquo;.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Vector_Unit">FT_Vector_Unit</h3>
<p>Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_Vector_Unit</b>( <a href="ft2-basic_types.html#FT_Vector">FT_Vector</a>* vec,
<a href="ft2-computations.html#FT_Angle">FT_Angle</a> angle );
</pre>
<p>Return the unit vector corresponding to a given angle. After the call, the value of &lsquo;vec.x&rsquo; will be &lsquo;cos(angle)&rsquo;, and the value of &lsquo;vec.y&rsquo; will be &lsquo;sin(angle)&rsquo;.</p>
<p>This function is useful to retrieve both the sinus and cosinus of a given angle quickly.</p>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="vec">vec</td><td class="desc">
<p>The address of target vector.</p>
</td></tr>
</table>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="angle">angle</td><td class="desc">
<p>The input angle.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Vector_Rotate">FT_Vector_Rotate</h3>
<p>Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_Vector_Rotate</b>( <a href="ft2-basic_types.html#FT_Vector">FT_Vector</a>* vec,
<a href="ft2-computations.html#FT_Angle">FT_Angle</a> angle );
</pre>
<p>Rotate a vector by a given angle.</p>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="vec">vec</td><td class="desc">
<p>The address of target vector.</p>
</td></tr>
</table>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="angle">angle</td><td class="desc">
<p>The input angle.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Vector_Length">FT_Vector_Length</h3>
<p>Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> )
<b>FT_Vector_Length</b>( <a href="ft2-basic_types.html#FT_Vector">FT_Vector</a>* vec );
</pre>
<p>Return the length of a given vector.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="vec">vec</td><td class="desc">
<p>The address of target vector.</p>
</td></tr>
</table>
<h4>return</h4>
<p>The vector length, expressed in the same units that the original vector coordinates.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Vector_Polarize">FT_Vector_Polarize</h3>
<p>Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_Vector_Polarize</b>( <a href="ft2-basic_types.html#FT_Vector">FT_Vector</a>* vec,
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> *length,
<a href="ft2-computations.html#FT_Angle">FT_Angle</a> *angle );
</pre>
<p>Compute both the length and angle of a given vector.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="vec">vec</td><td class="desc">
<p>The address of source vector.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="length">length</td><td class="desc">
<p>The vector length.</p>
</td></tr>
<tr><td class="val" id="angle">angle</td><td class="desc">
<p>The vector angle.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Vector_From_Polar">FT_Vector_From_Polar</h3>
<p>Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_Vector_From_Polar</b>( <a href="ft2-basic_types.html#FT_Vector">FT_Vector</a>* vec,
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> length,
<a href="ft2-computations.html#FT_Angle">FT_Angle</a> angle );
</pre>
<p>Compute vector coordinates from a length and angle.</p>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="vec">vec</td><td class="desc">
<p>The address of source vector.</p>
</td></tr>
</table>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="length">length</td><td class="desc">
<p>The vector length.</p>
</td></tr>
<tr><td class="val" id="angle">angle</td><td class="desc">
<p>The vector angle.</p>
</td></tr>
</table>
<hr>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="error_code_values">Error Code Values</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_Err_XXX">FT_Err_XXX</a></td><td></td><td></td><td></td><td></td><td></td><td></td></tr>
</table>
<p>The list below is taken verbatim from the file &lsquo;fterrdef.h&rsquo; (loaded automatically by including &lsquo;FT_FREETYPE_H&rsquo;). The first argument of the &lsquo;FT_ERROR_DEF_&rsquo; macro is the error label; by default, the prefix &lsquo;FT_Err_&rsquo; gets added so that you get error names like &lsquo;FT_Err_Cannot_Open_Resource&rsquo;. The second argument is the error code, and the last argument an error string, which is not used by FreeType.</p>
<p>Within your application you should <b>only</b> use error names and <b>never</b> its numeric values! The latter might (and actually do) change in forthcoming FreeType versions.</p>
<p>Macro &lsquo;FT_NOERRORDEF_&rsquo; defines &lsquo;FT_Err_Ok&rsquo;, which is always zero. See the &lsquo;Error Enumerations&rsquo; subsection how to automatically generate a list of error strings.</p>
<div class="section">
<h3 id="FT_Err_XXX">FT_Err_XXX</h3>
<pre>
/* generic errors */
FT_NOERRORDEF_( Ok, 0x00,
"no error" )
FT_ERRORDEF_( Cannot_Open_Resource, 0x01,
"cannot open resource" )
FT_ERRORDEF_( Unknown_File_Format, 0x02,
"unknown file format" )
FT_ERRORDEF_( Invalid_File_Format, 0x03,
"broken file" )
FT_ERRORDEF_( Invalid_Version, 0x04,
"invalid FreeType version" )
FT_ERRORDEF_( Lower_Module_Version, 0x05,
"module version is too low" )
FT_ERRORDEF_( Invalid_Argument, 0x06,
"invalid argument" )
FT_ERRORDEF_( Unimplemented_Feature, 0x07,
"unimplemented feature" )
FT_ERRORDEF_( Invalid_Table, 0x08,
"broken table" )
FT_ERRORDEF_( Invalid_Offset, 0x09,
"broken offset within table" )
FT_ERRORDEF_( Array_Too_Large, 0x0A,
"array allocation size too large" )
FT_ERRORDEF_( Missing_Module, 0x0B,
"missing module" )
FT_ERRORDEF_( Missing_Property, 0x0C,
"missing property" )
/* glyph/character errors */
FT_ERRORDEF_( Invalid_Glyph_Index, 0x10,
"invalid glyph index" )
FT_ERRORDEF_( Invalid_Character_Code, 0x11,
"invalid character code" )
FT_ERRORDEF_( Invalid_Glyph_Format, 0x12,
"unsupported glyph image format" )
FT_ERRORDEF_( Cannot_Render_Glyph, 0x13,
"cannot render this glyph format" )
FT_ERRORDEF_( Invalid_Outline, 0x14,
"invalid outline" )
FT_ERRORDEF_( Invalid_Composite, 0x15,
"invalid composite glyph" )
FT_ERRORDEF_( Too_Many_Hints, 0x16,
"too many hints" )
FT_ERRORDEF_( Invalid_Pixel_Size, 0x17,
"invalid pixel size" )
/* handle errors */
FT_ERRORDEF_( Invalid_Handle, 0x20,
"invalid object handle" )
FT_ERRORDEF_( Invalid_Library_Handle, 0x21,
"invalid library handle" )
FT_ERRORDEF_( Invalid_Driver_Handle, 0x22,
"invalid module handle" )
FT_ERRORDEF_( Invalid_Face_Handle, 0x23,
"invalid face handle" )
FT_ERRORDEF_( Invalid_Size_Handle, 0x24,
"invalid size handle" )
FT_ERRORDEF_( Invalid_Slot_Handle, 0x25,
"invalid glyph slot handle" )
FT_ERRORDEF_( Invalid_CharMap_Handle, 0x26,
"invalid charmap handle" )
FT_ERRORDEF_( Invalid_Cache_Handle, 0x27,
"invalid cache manager handle" )
FT_ERRORDEF_( Invalid_Stream_Handle, 0x28,
"invalid stream handle" )
/* driver errors */
FT_ERRORDEF_( Too_Many_Drivers, 0x30,
"too many modules" )
FT_ERRORDEF_( Too_Many_Extensions, 0x31,
"too many extensions" )
/* memory errors */
FT_ERRORDEF_( Out_Of_Memory, 0x40,
"out of memory" )
FT_ERRORDEF_( Unlisted_Object, 0x41,
"unlisted object" )
/* stream errors */
FT_ERRORDEF_( Cannot_Open_Stream, 0x51,
"cannot open stream" )
FT_ERRORDEF_( Invalid_Stream_Seek, 0x52,
"invalid stream seek" )
FT_ERRORDEF_( Invalid_Stream_Skip, 0x53,
"invalid stream skip" )
FT_ERRORDEF_( Invalid_Stream_Read, 0x54,
"invalid stream read" )
FT_ERRORDEF_( Invalid_Stream_Operation, 0x55,
"invalid stream operation" )
FT_ERRORDEF_( Invalid_Frame_Operation, 0x56,
"invalid frame operation" )
FT_ERRORDEF_( Nested_Frame_Access, 0x57,
"nested frame access" )
FT_ERRORDEF_( Invalid_Frame_Read, 0x58,
"invalid frame read" )
/* raster errors */
FT_ERRORDEF_( Raster_Uninitialized, 0x60,
"raster uninitialized" )
FT_ERRORDEF_( Raster_Corrupted, 0x61,
"raster corrupted" )
FT_ERRORDEF_( Raster_Overflow, 0x62,
"raster overflow" )
FT_ERRORDEF_( Raster_Negative_Height, 0x63,
"negative height while rastering" )
/* cache errors */
FT_ERRORDEF_( Too_Many_Caches, 0x70,
"too many registered caches" )
/* TrueType and SFNT errors */
FT_ERRORDEF_( Invalid_Opcode, 0x80,
"invalid opcode" )
FT_ERRORDEF_( Too_Few_Arguments, 0x81,
"too few arguments" )
FT_ERRORDEF_( Stack_Overflow, 0x82,
"stack overflow" )
FT_ERRORDEF_( Code_Overflow, 0x83,
"code overflow" )
FT_ERRORDEF_( Bad_Argument, 0x84,
"bad argument" )
FT_ERRORDEF_( Divide_By_Zero, 0x85,
"division by zero" )
FT_ERRORDEF_( Invalid_Reference, 0x86,
"invalid reference" )
FT_ERRORDEF_( Debug_OpCode, 0x87,
"found debug opcode" )
FT_ERRORDEF_( ENDF_In_Exec_Stream, 0x88,
"found ENDF opcode in execution stream" )
FT_ERRORDEF_( Nested_DEFS, 0x89,
"nested DEFS" )
FT_ERRORDEF_( Invalid_CodeRange, 0x8A,
"invalid code range" )
FT_ERRORDEF_( Execution_Too_Long, 0x8B,
"execution context too <span class="keyword">long</span>" )
FT_ERRORDEF_( Too_Many_Function_Defs, 0x8C,
"too many function definitions" )
FT_ERRORDEF_( Too_Many_Instruction_Defs, 0x8D,
"too many instruction definitions" )
FT_ERRORDEF_( Table_Missing, 0x8E,
"SFNT font table missing" )
FT_ERRORDEF_( Horiz_Header_Missing, 0x8F,
"horizontal header (hhea) table missing" )
FT_ERRORDEF_( Locations_Missing, 0x90,
"locations (loca) table missing" )
FT_ERRORDEF_( Name_Table_Missing, 0x91,
"name table missing" )
FT_ERRORDEF_( CMap_Table_Missing, 0x92,
"character map (cmap) table missing" )
FT_ERRORDEF_( Hmtx_Table_Missing, 0x93,
"horizontal metrics (hmtx) table missing" )
FT_ERRORDEF_( Post_Table_Missing, 0x94,
"PostScript (post) table missing" )
FT_ERRORDEF_( Invalid_Horiz_Metrics, 0x95,
"invalid horizontal metrics" )
FT_ERRORDEF_( Invalid_CharMap_Format, 0x96,
"invalid character map (cmap) format" )
FT_ERRORDEF_( Invalid_PPem, 0x97,
"invalid ppem value" )
FT_ERRORDEF_( Invalid_Vert_Metrics, 0x98,
"invalid vertical metrics" )
FT_ERRORDEF_( Could_Not_Find_Context, 0x99,
"could not find context" )
FT_ERRORDEF_( Invalid_Post_Table_Format, 0x9A,
"invalid PostScript (post) table format" )
FT_ERRORDEF_( Invalid_Post_Table, 0x9B,
"invalid PostScript (post) table" )
FT_ERRORDEF_( DEF_In_Glyf_Bytecode, 0x9C,
"found FDEF or IDEF opcode in glyf bytecode" )
FT_ERRORDEF_( Missing_Bitmap, 0x9D,
"missing bitmap in strike" )
/* CFF, CID, and Type 1 errors */
FT_ERRORDEF_( Syntax_Error, 0xA0,
"opcode syntax error" )
FT_ERRORDEF_( Stack_Underflow, 0xA1,
"argument stack underflow" )
FT_ERRORDEF_( Ignore, 0xA2,
"ignore" )
FT_ERRORDEF_( No_Unicode_Glyph_Name, 0xA3,
"no Unicode glyph name found" )
FT_ERRORDEF_( Glyph_Too_Big, 0xA4,
"glyph too big for hinting" )
/* BDF errors */
FT_ERRORDEF_( Missing_Startfont_Field, 0xB0,
"`STARTFONT' field missing" )
FT_ERRORDEF_( Missing_Font_Field, 0xB1,
"`FONT' field missing" )
FT_ERRORDEF_( Missing_Size_Field, 0xB2,
"`SIZE' field missing" )
FT_ERRORDEF_( Missing_Fontboundingbox_Field, 0xB3,
"`FONTBOUNDINGBOX' field missing" )
FT_ERRORDEF_( Missing_Chars_Field, 0xB4,
"`CHARS' field missing" )
FT_ERRORDEF_( Missing_Startchar_Field, 0xB5,
"`STARTCHAR' field missing" )
FT_ERRORDEF_( Missing_Encoding_Field, 0xB6,
"`ENCODING' field missing" )
FT_ERRORDEF_( Missing_Bbx_Field, 0xB7,
"`BBX' field missing" )
FT_ERRORDEF_( Bbx_Too_Big, 0xB8,
"`BBX' too big" )
FT_ERRORDEF_( Corrupted_Font_Header, 0xB9,
"Font header corrupted or missing fields" )
FT_ERRORDEF_( Corrupted_Font_Glyphs, 0xBA,
"Font glyphs corrupted or missing fields" )
</pre>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="error_enumerations">Error Enumerations</h1>
<p>The header file &lsquo;fterrors.h&rsquo; (which is automatically included by &lsquo;freetype.h&rsquo; defines the handling of FreeType's enumeration constants. It can also be used to generate error message strings with a small macro trick explained below.</p>
<p><b>Error</b> <b>Formats</b></p>
<p>The configuration macro FT_CONFIG_OPTION_USE_MODULE_ERRORS can be defined in &lsquo;ftoption.h&rsquo; in order to make the higher byte indicate the module where the error has happened (this is not compatible with standard builds of FreeType&nbsp;2, however). See the file &lsquo;ftmoderr.h&rsquo; for more details.</p>
<p><b>Error</b> <b>Message</b> <b>Strings</b></p>
<p>Error definitions are set up with special macros that allow client applications to build a table of error message strings. The strings are not included in a normal build of FreeType&nbsp;2 to save space (most client applications do not use them).</p>
<p>To do so, you have to define the following macros before including this file.</p>
<pre class="colored">
FT_ERROR_START_LIST
</pre>
<p>This macro is called before anything else to define the start of the error list. It is followed by several FT_ERROR_DEF calls.</p>
<pre class="colored">
FT_ERROR_DEF( e, v, s )
</pre>
<p>This macro is called to define one single error. &lsquo;e&rsquo; is the error code identifier (e.g., &lsquo;Invalid_Argument&rsquo;), &lsquo;v&rsquo; is the error's numerical value, and &lsquo;s&rsquo; is the corresponding error string.</p>
<pre class="colored">
FT_ERROR_END_LIST
</pre>
<p>This macro ends the list.</p>
<p>Additionally, you have to undefine &lsquo;FTERRORS_H_&rsquo; before #including this file.</p>
<p>Here is a simple example.</p>
<pre class="colored">
#undef FTERRORS_H_
#define FT_ERRORDEF( e, v, s ) { e, s },
#define FT_ERROR_START_LIST {
#define FT_ERROR_END_LIST { 0, NULL } };
const struct
{
int err_code;
const char* err_msg;
} ft_errors[] =
#include FT_ERRORS_H
</pre>
<p>Note that &lsquo;FT_Err_Ok&rsquo; is <i>not</i> defined with &lsquo;FT_ERRORDEF&rsquo; but with &lsquo;FT_NOERRORDEF&rsquo;; it is always zero.</p>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="font_formats">Font Formats</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_Get_Font_Format">FT_Get_Font_Format</a></td><td></td><td></td></tr>
</table>
<p>The single function in this section can be used to get the font format. Note that this information is not needed normally; however, there are special cases (like in PDF devices) where it is important to differentiate, in spite of FreeType's uniform API.</p>
<div class="section">
<h3 id="FT_Get_Font_Format">FT_Get_Font_Format</h3>
<p>Defined in FT_FONT_FORMATS_H (freetype/ftfntfmt.h).</p>
<pre>
FT_EXPORT( <span class="keyword">const</span> <span class="keyword">char</span>* )
<b>FT_Get_Font_Format</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face );
/* deprecated */
FT_EXPORT( <span class="keyword">const</span> <span class="keyword">char</span>* )
FT_Get_X11_Font_Format( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face );
</pre>
<p>Return a string describing the format of a given face. Possible values are &lsquo;TrueType&rsquo;, &lsquo;Type&nbsp;1&rsquo;, &lsquo;BDF&rsquo;, &lsquo;PCF&rsquo;, &lsquo;Type&nbsp;42&rsquo;, &lsquo;CID&nbsp;Type&nbsp;1&rsquo;, &lsquo;CFF&rsquo;, &lsquo;PFR&rsquo;, and &lsquo;Windows&nbsp;FNT&rsquo;.</p>
<p>The return value is suitable to be used as an X11 FONT_PROPERTY.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>Input face handle.</p>
</td></tr>
</table>
<h4>return</h4>
<p>Font format string. NULL in case of error.</p>
<h4>note</h4>
<p>A deprecated name for the same function is &lsquo;FT_Get_X11_Font_Format&rsquo;.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="gasp_table">Gasp Table</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_GASP_XXX">FT_GASP_XXX</a></td><td><a href="#FT_Get_Gasp">FT_Get_Gasp</a></td><td></td><td></td><td></td><td></td></tr>
</table>
<p>The function <a href="ft2-gasp_table.html#FT_Get_Gasp">FT_Get_Gasp</a> can be used to query a TrueType or OpenType font for specific entries in its &lsquo;gasp&rsquo; table, if any. This is mainly useful when implementing native TrueType hinting with the bytecode interpreter to duplicate the Windows text rendering results.</p>
<div class="section">
<h3 id="FT_GASP_XXX">FT_GASP_XXX</h3>
<p>Defined in FT_GASP_H (freetype/ftgasp.h).</p>
<pre>
#define <a href="ft2-gasp_table.html#FT_GASP_NO_TABLE">FT_GASP_NO_TABLE</a> -1
#define <a href="ft2-gasp_table.html#FT_GASP_DO_GRIDFIT">FT_GASP_DO_GRIDFIT</a> 0x01
#define <a href="ft2-gasp_table.html#FT_GASP_DO_GRAY">FT_GASP_DO_GRAY</a> 0x02
#define <a href="ft2-gasp_table.html#FT_GASP_SYMMETRIC_GRIDFIT">FT_GASP_SYMMETRIC_GRIDFIT</a> 0x04
#define <a href="ft2-gasp_table.html#FT_GASP_SYMMETRIC_SMOOTHING">FT_GASP_SYMMETRIC_SMOOTHING</a> 0x08
</pre>
<p>A list of values and/or bit-flags returned by the <a href="ft2-gasp_table.html#FT_Get_Gasp">FT_Get_Gasp</a> function.</p>
<h4>values</h4>
<table class="fields">
<tr><td class="val" id="FT_GASP_NO_TABLE">FT_GASP_NO_TABLE</td><td class="desc">
<p>This special value means that there is no GASP table in this face. It is up to the client to decide what to do.</p>
</td></tr>
<tr><td class="val" id="FT_GASP_DO_GRIDFIT">FT_GASP_DO_GRIDFIT</td><td class="desc">
<p>Grid-fitting and hinting should be performed at the specified ppem. This <b>really</b> means TrueType bytecode interpretation. If this bit is not set, no hinting gets applied.</p>
</td></tr>
<tr><td class="val" id="FT_GASP_DO_GRAY">FT_GASP_DO_GRAY</td><td class="desc">
<p>Anti-aliased rendering should be performed at the specified ppem. If not set, do monochrome rendering.</p>
</td></tr>
<tr><td class="val" id="FT_GASP_SYMMETRIC_SMOOTHING">FT_GASP_SYMMETRIC_SMOOTHING</td><td class="desc">
<p>If set, smoothing along multiple axes must be used with ClearType.</p>
</td></tr>
<tr><td class="val" id="FT_GASP_SYMMETRIC_GRIDFIT">FT_GASP_SYMMETRIC_GRIDFIT</td><td class="desc">
<p>Grid-fitting must be used with ClearType's symmetric smoothing.</p>
</td></tr>
</table>
<h4>note</h4>
<p>The bit-flags &lsquo;FT_GASP_DO_GRIDFIT&rsquo; and &lsquo;FT_GASP_DO_GRAY&rsquo; are to be used for standard font rasterization only. Independently of that, &lsquo;FT_GASP_SYMMETRIC_SMOOTHING&rsquo; and &lsquo;FT_GASP_SYMMETRIC_GRIDFIT&rsquo; are to be used if ClearType is enabled (and &lsquo;FT_GASP_DO_GRIDFIT&rsquo; and &lsquo;FT_GASP_DO_GRAY&rsquo; are consequently ignored).</p>
<p>&lsquo;ClearType&rsquo; is Microsoft's implementation of LCD rendering, partly protected by patents.</p>
<h4>since</h4>
<p>2.3.0</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Get_Gasp">FT_Get_Gasp</h3>
<p>Defined in FT_GASP_H (freetype/ftgasp.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Int">FT_Int</a> )
<b>FT_Get_Gasp</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> ppem );
</pre>
<p>For a TrueType or OpenType font file, return the rasterizer behaviour flags from the font's &lsquo;gasp&rsquo; table corresponding to a given character pixel size.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>The source face handle.</p>
</td></tr>
<tr><td class="val" id="ppem">ppem</td><td class="desc">
<p>The vertical character pixel size.</p>
</td></tr>
</table>
<h4>return</h4>
<p>Bit flags (see <a href="ft2-gasp_table.html#FT_GASP_XXX">FT_GASP_XXX</a>), or <a href="ft2-gasp_table.html#FT_GASP_XXX">FT_GASP_NO_TABLE</a> if there is no &lsquo;gasp&rsquo; table in the face.</p>
<h4>note</h4>
<p>If you want to use the MM functionality of OpenType variation fonts (i.e., using <a href="ft2-multiple_masters.html#FT_Set_Var_Design_Coordinates">FT_Set_Var_Design_Coordinates</a> and friends), call this function <b>after</b> setting an instance since the return values can change.</p>
<h4>since</h4>
<p>2.3.0</p>
<hr>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="glyph_management">Glyph Management</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_Glyph">FT_Glyph</a></td><td><a href="#FT_OutlineGlyphRec">FT_OutlineGlyphRec</a></td><td><a href="#FT_Glyph_Get_CBox">FT_Glyph_Get_CBox</a></td></tr>
<tr><td><a href="#FT_GlyphRec">FT_GlyphRec</a></td><td><a href="#FT_Get_Glyph">FT_Get_Glyph</a></td><td><a href="#FT_Glyph_To_Bitmap">FT_Glyph_To_Bitmap</a></td></tr>
<tr><td><a href="#FT_BitmapGlyph">FT_BitmapGlyph</a></td><td><a href="#FT_Glyph_Copy">FT_Glyph_Copy</a></td><td><a href="#FT_Done_Glyph">FT_Done_Glyph</a></td></tr>
<tr><td><a href="#FT_BitmapGlyphRec">FT_BitmapGlyphRec</a></td><td><a href="#FT_Glyph_Transform">FT_Glyph_Transform</a></td><td></td></tr>
<tr><td><a href="#FT_OutlineGlyph">FT_OutlineGlyph</a></td><td><a href="#FT_Glyph_BBox_Mode">FT_Glyph_BBox_Mode</a></td><td></td></tr>
</table>
<p>This section contains definitions used to manage glyph data through generic FT_Glyph objects. Each of them can contain a bitmap, a vector outline, or even images in other formats.</p>
<div class="section">
<h3 id="FT_Glyph">FT_Glyph</h3>
<p>Defined in FT_GLYPH_H (freetype/ftglyph.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_GlyphRec_* <b>FT_Glyph</b>;
</pre>
<p>Handle to an object used to model generic glyph images. It is a pointer to the <a href="ft2-glyph_management.html#FT_GlyphRec">FT_GlyphRec</a> structure and can contain a glyph bitmap or pointer.</p>
<h4>note</h4>
<p>Glyph objects are not owned by the library. You must thus release them manually (through <a href="ft2-glyph_management.html#FT_Done_Glyph">FT_Done_Glyph</a>) <i>before</i> calling <a href="ft2-base_interface.html#FT_Done_FreeType">FT_Done_FreeType</a>.</p>
<hr>
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<div class="section">
<h3 id="FT_GlyphRec">FT_GlyphRec</h3>
<p>Defined in FT_GLYPH_H (freetype/ftglyph.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_GlyphRec_
{
<a href="ft2-base_interface.html#FT_Library">FT_Library</a> library;
<span class="keyword">const</span> FT_Glyph_Class* clazz;
<a href="ft2-basic_types.html#FT_Glyph_Format">FT_Glyph_Format</a> format;
<a href="ft2-basic_types.html#FT_Vector">FT_Vector</a> advance;
} <b>FT_GlyphRec</b>;
</pre>
<p>The root glyph structure contains a given glyph image plus its advance width in 16.16 fixed-point format.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="library">library</td><td class="desc">
<p>A handle to the FreeType library object.</p>
</td></tr>
<tr><td class="val" id="clazz">clazz</td><td class="desc">
<p>A pointer to the glyph's class. Private.</p>
</td></tr>
<tr><td class="val" id="format">format</td><td class="desc">
<p>The format of the glyph's image.</p>
</td></tr>
<tr><td class="val" id="advance">advance</td><td class="desc">
<p>A 16.16 vector that gives the glyph's advance width.</p>
</td></tr>
</table>
<hr>
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<div class="section">
<h3 id="FT_BitmapGlyph">FT_BitmapGlyph</h3>
<p>Defined in FT_GLYPH_H (freetype/ftglyph.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_BitmapGlyphRec_* <b>FT_BitmapGlyph</b>;
</pre>
<p>A handle to an object used to model a bitmap glyph image. This is a sub-class of <a href="ft2-glyph_management.html#FT_Glyph">FT_Glyph</a>, and a pointer to <a href="ft2-glyph_management.html#FT_BitmapGlyphRec">FT_BitmapGlyphRec</a>.</p>
<hr>
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<div class="section">
<h3 id="FT_BitmapGlyphRec">FT_BitmapGlyphRec</h3>
<p>Defined in FT_GLYPH_H (freetype/ftglyph.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_BitmapGlyphRec_
{
<a href="ft2-glyph_management.html#FT_GlyphRec">FT_GlyphRec</a> root;
<a href="ft2-basic_types.html#FT_Int">FT_Int</a> left;
<a href="ft2-basic_types.html#FT_Int">FT_Int</a> top;
<a href="ft2-basic_types.html#FT_Bitmap">FT_Bitmap</a> bitmap;
} <b>FT_BitmapGlyphRec</b>;
</pre>
<p>A structure used for bitmap glyph images. This really is a &lsquo;sub-class&rsquo; of <a href="ft2-glyph_management.html#FT_GlyphRec">FT_GlyphRec</a>.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="root">root</td><td class="desc">
<p>The root <a href="ft2-glyph_management.html#FT_Glyph">FT_Glyph</a> fields.</p>
</td></tr>
<tr><td class="val" id="left">left</td><td class="desc">
<p>The left-side bearing, i.e., the horizontal distance from the current pen position to the left border of the glyph bitmap.</p>
</td></tr>
<tr><td class="val" id="top">top</td><td class="desc">
<p>The top-side bearing, i.e., the vertical distance from the current pen position to the top border of the glyph bitmap. This distance is positive for upwards&nbsp;y!</p>
</td></tr>
<tr><td class="val" id="bitmap">bitmap</td><td class="desc">
<p>A descriptor for the bitmap.</p>
</td></tr>
</table>
<h4>note</h4>
<p>You can typecast an <a href="ft2-glyph_management.html#FT_Glyph">FT_Glyph</a> to <a href="ft2-glyph_management.html#FT_BitmapGlyph">FT_BitmapGlyph</a> if you have &lsquo;glyph-&gt;format == FT_GLYPH_FORMAT_BITMAP&rsquo;. This lets you access the bitmap's contents easily.</p>
<p>The corresponding pixel buffer is always owned by <a href="ft2-glyph_management.html#FT_BitmapGlyph">FT_BitmapGlyph</a> and is thus created and destroyed with it.</p>
<hr>
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<div class="section">
<h3 id="FT_OutlineGlyph">FT_OutlineGlyph</h3>
<p>Defined in FT_GLYPH_H (freetype/ftglyph.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_OutlineGlyphRec_* <b>FT_OutlineGlyph</b>;
</pre>
<p>A handle to an object used to model an outline glyph image. This is a sub-class of <a href="ft2-glyph_management.html#FT_Glyph">FT_Glyph</a>, and a pointer to <a href="ft2-glyph_management.html#FT_OutlineGlyphRec">FT_OutlineGlyphRec</a>.</p>
<hr>
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<div class="section">
<h3 id="FT_OutlineGlyphRec">FT_OutlineGlyphRec</h3>
<p>Defined in FT_GLYPH_H (freetype/ftglyph.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_OutlineGlyphRec_
{
<a href="ft2-glyph_management.html#FT_GlyphRec">FT_GlyphRec</a> root;
<a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a> outline;
} <b>FT_OutlineGlyphRec</b>;
</pre>
<p>A structure used for outline (vectorial) glyph images. This really is a &lsquo;sub-class&rsquo; of <a href="ft2-glyph_management.html#FT_GlyphRec">FT_GlyphRec</a>.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="root">root</td><td class="desc">
<p>The root <a href="ft2-glyph_management.html#FT_Glyph">FT_Glyph</a> fields.</p>
</td></tr>
<tr><td class="val" id="outline">outline</td><td class="desc">
<p>A descriptor for the outline.</p>
</td></tr>
</table>
<h4>note</h4>
<p>You can typecast an <a href="ft2-glyph_management.html#FT_Glyph">FT_Glyph</a> to <a href="ft2-glyph_management.html#FT_OutlineGlyph">FT_OutlineGlyph</a> if you have &lsquo;glyph-&gt;format == FT_GLYPH_FORMAT_OUTLINE&rsquo;. This lets you access the outline's content easily.</p>
<p>As the outline is extracted from a glyph slot, its coordinates are expressed normally in 26.6 pixels, unless the flag <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_NO_SCALE</a> was used in <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a>() or <a href="ft2-base_interface.html#FT_Load_Char">FT_Load_Char</a>().</p>
<p>The outline's tables are always owned by the object and are destroyed with it.</p>
<hr>
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<div class="section">
<h3 id="FT_Get_Glyph">FT_Get_Glyph</h3>
<p>Defined in FT_GLYPH_H (freetype/ftglyph.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Get_Glyph</b>( <a href="ft2-base_interface.html#FT_GlyphSlot">FT_GlyphSlot</a> slot,
<a href="ft2-glyph_management.html#FT_Glyph">FT_Glyph</a> *aglyph );
</pre>
<p>A function used to extract a glyph image from a slot. Note that the created <a href="ft2-glyph_management.html#FT_Glyph">FT_Glyph</a> object must be released with <a href="ft2-glyph_management.html#FT_Done_Glyph">FT_Done_Glyph</a>.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="slot">slot</td><td class="desc">
<p>A handle to the source glyph slot.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="aglyph">aglyph</td><td class="desc">
<p>A handle to the glyph object.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>Because &lsquo;*aglyph-&gt;advance.x&rsquo; and '*aglyph-&gt;advance.y' are 16.16 fixed-point numbers, &lsquo;slot-&gt;advance.x&rsquo; and &lsquo;slot-&gt;advance.y&rsquo; (which are in 26.6 fixed-point format) must be in the range ]-32768;32768[.</p>
<hr>
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<div class="section">
<h3 id="FT_Glyph_Copy">FT_Glyph_Copy</h3>
<p>Defined in FT_GLYPH_H (freetype/ftglyph.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Glyph_Copy</b>( <a href="ft2-glyph_management.html#FT_Glyph">FT_Glyph</a> source,
<a href="ft2-glyph_management.html#FT_Glyph">FT_Glyph</a> *target );
</pre>
<p>A function used to copy a glyph image. Note that the created <a href="ft2-glyph_management.html#FT_Glyph">FT_Glyph</a> object must be released with <a href="ft2-glyph_management.html#FT_Done_Glyph">FT_Done_Glyph</a>.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="source">source</td><td class="desc">
<p>A handle to the source glyph object.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="target">target</td><td class="desc">
<p>A handle to the target glyph object. 0&nbsp;in case of error.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<hr>
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<div class="section">
<h3 id="FT_Glyph_Transform">FT_Glyph_Transform</h3>
<p>Defined in FT_GLYPH_H (freetype/ftglyph.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Glyph_Transform</b>( <a href="ft2-glyph_management.html#FT_Glyph">FT_Glyph</a> glyph,
<a href="ft2-basic_types.html#FT_Matrix">FT_Matrix</a>* matrix,
<a href="ft2-basic_types.html#FT_Vector">FT_Vector</a>* delta );
</pre>
<p>Transform a glyph image if its format is scalable.</p>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="glyph">glyph</td><td class="desc">
<p>A handle to the target glyph object.</p>
</td></tr>
</table>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="matrix">matrix</td><td class="desc">
<p>A pointer to a 2x2 matrix to apply.</p>
</td></tr>
<tr><td class="val" id="delta">delta</td><td class="desc">
<p>A pointer to a 2d vector to apply. Coordinates are expressed in 1/64th of a pixel.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code (if not 0, the glyph format is not scalable).</p>
<h4>note</h4>
<p>The 2x2 transformation matrix is also applied to the glyph's advance vector.</p>
<hr>
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<div class="section">
<h3 id="FT_Glyph_BBox_Mode">FT_Glyph_BBox_Mode</h3>
<p>Defined in FT_GLYPH_H (freetype/ftglyph.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">enum</span> FT_Glyph_BBox_Mode_
{
<a href="ft2-glyph_management.html#FT_GLYPH_BBOX_UNSCALED">FT_GLYPH_BBOX_UNSCALED</a> = 0,
<a href="ft2-glyph_management.html#FT_GLYPH_BBOX_SUBPIXELS">FT_GLYPH_BBOX_SUBPIXELS</a> = 0,
<a href="ft2-glyph_management.html#FT_GLYPH_BBOX_GRIDFIT">FT_GLYPH_BBOX_GRIDFIT</a> = 1,
<a href="ft2-glyph_management.html#FT_GLYPH_BBOX_TRUNCATE">FT_GLYPH_BBOX_TRUNCATE</a> = 2,
<a href="ft2-glyph_management.html#FT_GLYPH_BBOX_PIXELS">FT_GLYPH_BBOX_PIXELS</a> = 3
} <b>FT_Glyph_BBox_Mode</b>;
/* these constants are deprecated; use the corresponding */
/* `<b>FT_Glyph_BBox_Mode</b>' values instead */
#define ft_glyph_bbox_unscaled <a href="ft2-glyph_management.html#FT_GLYPH_BBOX_UNSCALED">FT_GLYPH_BBOX_UNSCALED</a>
#define ft_glyph_bbox_subpixels <a href="ft2-glyph_management.html#FT_GLYPH_BBOX_SUBPIXELS">FT_GLYPH_BBOX_SUBPIXELS</a>
#define ft_glyph_bbox_gridfit <a href="ft2-glyph_management.html#FT_GLYPH_BBOX_GRIDFIT">FT_GLYPH_BBOX_GRIDFIT</a>
#define ft_glyph_bbox_truncate <a href="ft2-glyph_management.html#FT_GLYPH_BBOX_TRUNCATE">FT_GLYPH_BBOX_TRUNCATE</a>
#define ft_glyph_bbox_pixels <a href="ft2-glyph_management.html#FT_GLYPH_BBOX_PIXELS">FT_GLYPH_BBOX_PIXELS</a>
</pre>
<p>The mode how the values of <a href="ft2-glyph_management.html#FT_Glyph_Get_CBox">FT_Glyph_Get_CBox</a> are returned.</p>
<h4>values</h4>
<table class="fields">
<tr><td class="val" id="FT_GLYPH_BBOX_UNSCALED">FT_GLYPH_BBOX_UNSCALED</td><td class="desc">
<p>Return unscaled font units.</p>
</td></tr>
<tr><td class="val" id="FT_GLYPH_BBOX_SUBPIXELS">FT_GLYPH_BBOX_SUBPIXELS</td><td class="desc">
<p>Return unfitted 26.6 coordinates.</p>
</td></tr>
<tr><td class="val" id="FT_GLYPH_BBOX_GRIDFIT">FT_GLYPH_BBOX_GRIDFIT</td><td class="desc">
<p>Return grid-fitted 26.6 coordinates.</p>
</td></tr>
<tr><td class="val" id="FT_GLYPH_BBOX_TRUNCATE">FT_GLYPH_BBOX_TRUNCATE</td><td class="desc">
<p>Return coordinates in integer pixels.</p>
</td></tr>
<tr><td class="val" id="FT_GLYPH_BBOX_PIXELS">FT_GLYPH_BBOX_PIXELS</td><td class="desc">
<p>Return grid-fitted pixel coordinates.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Glyph_Get_CBox">FT_Glyph_Get_CBox</h3>
<p>Defined in FT_GLYPH_H (freetype/ftglyph.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_Glyph_Get_CBox</b>( <a href="ft2-glyph_management.html#FT_Glyph">FT_Glyph</a> glyph,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> bbox_mode,
<a href="ft2-basic_types.html#FT_BBox">FT_BBox</a> *acbox );
</pre>
<p>Return a glyph's &lsquo;control box&rsquo;. The control box encloses all the outline's points, including Bézier control points. Though it coincides with the exact bounding box for most glyphs, it can be slightly larger in some situations (like when rotating an outline that contains Bézier outside arcs).</p>
<p>Computing the control box is very fast, while getting the bounding box can take much more time as it needs to walk over all segments and arcs in the outline. To get the latter, you can use the &lsquo;ftbbox&rsquo; component, which is dedicated to this single task.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="glyph">glyph</td><td class="desc">
<p>A handle to the source glyph object.</p>
</td></tr>
<tr><td class="val" id="mode">mode</td><td class="desc">
<p>The mode that indicates how to interpret the returned bounding box values.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="acbox">acbox</td><td class="desc">
<p>The glyph coordinate bounding box. Coordinates are expressed in 1/64th of pixels if it is grid-fitted.</p>
</td></tr>
</table>
<h4>note</h4>
<p>Coordinates are relative to the glyph origin, using the y&nbsp;upwards convention.</p>
<p>If the glyph has been loaded with <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_NO_SCALE</a>, &lsquo;bbox_mode&rsquo; must be set to <a href="ft2-glyph_management.html#FT_Glyph_BBox_Mode">FT_GLYPH_BBOX_UNSCALED</a> to get unscaled font units in 26.6 pixel format. The value <a href="ft2-glyph_management.html#FT_Glyph_BBox_Mode">FT_GLYPH_BBOX_SUBPIXELS</a> is another name for this constant.</p>
<p>If the font is tricky and the glyph has been loaded with <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_NO_SCALE</a>, the resulting CBox is meaningless. To get reasonable values for the CBox it is necessary to load the glyph at a large ppem value (so that the hinting instructions can properly shift and scale the subglyphs), then extracting the CBox, which can be eventually converted back to font units.</p>
<p>Note that the maximum coordinates are exclusive, which means that one can compute the width and height of the glyph image (be it in integer or 26.6 pixels) as:</p>
<pre class="colored">
width = bbox.xMax - bbox.xMin;
height = bbox.yMax - bbox.yMin;
</pre>
<p>Note also that for 26.6 coordinates, if &lsquo;bbox_mode&rsquo; is set to <a href="ft2-glyph_management.html#FT_Glyph_BBox_Mode">FT_GLYPH_BBOX_GRIDFIT</a>, the coordinates will also be grid-fitted, which corresponds to:</p>
<pre class="colored">
bbox.xMin = FLOOR(bbox.xMin);
bbox.yMin = FLOOR(bbox.yMin);
bbox.xMax = CEILING(bbox.xMax);
bbox.yMax = CEILING(bbox.yMax);
</pre>
<p>To get the bbox in pixel coordinates, set &lsquo;bbox_mode&rsquo; to <a href="ft2-glyph_management.html#FT_Glyph_BBox_Mode">FT_GLYPH_BBOX_TRUNCATE</a>.</p>
<p>To get the bbox in grid-fitted pixel coordinates, set &lsquo;bbox_mode&rsquo; to <a href="ft2-glyph_management.html#FT_Glyph_BBox_Mode">FT_GLYPH_BBOX_PIXELS</a>.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Glyph_To_Bitmap">FT_Glyph_To_Bitmap</h3>
<p>Defined in FT_GLYPH_H (freetype/ftglyph.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Glyph_To_Bitmap</b>( <a href="ft2-glyph_management.html#FT_Glyph">FT_Glyph</a>* the_glyph,
<a href="ft2-base_interface.html#FT_Render_Mode">FT_Render_Mode</a> render_mode,
<a href="ft2-basic_types.html#FT_Vector">FT_Vector</a>* origin,
<a href="ft2-basic_types.html#FT_Bool">FT_Bool</a> destroy );
</pre>
<p>Convert a given glyph object to a bitmap glyph object.</p>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="the_glyph">the_glyph</td><td class="desc">
<p>A pointer to a handle to the target glyph.</p>
</td></tr>
</table>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="render_mode">render_mode</td><td class="desc">
<p>An enumeration that describes how the data is rendered.</p>
</td></tr>
<tr><td class="val" id="origin">origin</td><td class="desc">
<p>A pointer to a vector used to translate the glyph image before rendering. Can be&nbsp;0 (if no translation). The origin is expressed in 26.6 pixels.</p>
</td></tr>
<tr><td class="val" id="destroy">destroy</td><td class="desc">
<p>A boolean that indicates that the original glyph image should be destroyed by this function. It is never destroyed in case of error.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>This function does nothing if the glyph format isn't scalable.</p>
<p>The glyph image is translated with the &lsquo;origin&rsquo; vector before rendering.</p>
<p>The first parameter is a pointer to an <a href="ft2-glyph_management.html#FT_Glyph">FT_Glyph</a> handle, that will be <i>replaced</i> by this function (with newly allocated data). Typically, you would use (omitting error handling):</p>
<p></p>
<pre class="colored">
FT_Glyph glyph;
FT_BitmapGlyph glyph_bitmap;
// load glyph
error = FT_Load_Char( face, glyph_index, FT_LOAD_DEFAULT );
// extract glyph image
error = FT_Get_Glyph( face-&gt;glyph, &amp;glyph );
// convert to a bitmap (default render mode + destroying old)
if ( glyph-&gt;format != FT_GLYPH_FORMAT_BITMAP )
{
error = FT_Glyph_To_Bitmap( &amp;glyph, FT_RENDER_MODE_NORMAL,
0, 1 );
if ( error ) // `glyph' unchanged
...
}
// access bitmap content by typecasting
glyph_bitmap = (FT_BitmapGlyph)glyph;
// do funny stuff with it, like blitting/drawing
...
// discard glyph image (bitmap or not)
FT_Done_Glyph( glyph );
</pre>
<p></p>
<p>Here another example, again without error handling:</p>
<p></p>
<pre class="colored">
FT_Glyph glyphs[MAX_GLYPHS]
...
for ( idx = 0; i &lt; MAX_GLYPHS; i++ )
error = FT_Load_Glyph( face, idx, FT_LOAD_DEFAULT ) ||
FT_Get_Glyph ( face-&gt;glyph, &amp;glyph[idx] );
...
for ( idx = 0; i &lt; MAX_GLYPHS; i++ )
{
FT_Glyph bitmap = glyphs[idx];
...
// after this call, `bitmap' no longer points into
// the `glyphs' array (and the old value isn't destroyed)
FT_Glyph_To_Bitmap( &amp;bitmap, FT_RENDER_MODE_MONO, 0, 0 );
...
FT_Done_Glyph( bitmap );
}
...
for ( idx = 0; i &lt; MAX_GLYPHS; i++ )
FT_Done_Glyph( glyphs[idx] );
</pre>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Done_Glyph">FT_Done_Glyph</h3>
<p>Defined in FT_GLYPH_H (freetype/ftglyph.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_Done_Glyph</b>( <a href="ft2-glyph_management.html#FT_Glyph">FT_Glyph</a> glyph );
</pre>
<p>Destroy a given glyph.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="glyph">glyph</td><td class="desc">
<p>A handle to the target glyph object.</p>
</td></tr>
</table>
<hr>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="glyph_stroker">Glyph Stroker</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_Stroker">FT_Stroker</a></td><td><a href="#FT_Stroker_ParseOutline">FT_Stroker_ParseOutline</a></td></tr>
<tr><td>&nbsp;</td><td><a href="#FT_Stroker_Done">FT_Stroker_Done</a></td></tr>
<tr><td><a href="#FT_Stroker_LineJoin">FT_Stroker_LineJoin</a></td><td>&nbsp;</td></tr>
<tr><td><a href="#FT_Stroker_LineCap">FT_Stroker_LineCap</a></td><td><a href="#FT_Stroker_BeginSubPath">FT_Stroker_BeginSubPath</a></td></tr>
<tr><td><a href="#FT_StrokerBorder">FT_StrokerBorder</a></td><td><a href="#FT_Stroker_EndSubPath">FT_Stroker_EndSubPath</a></td></tr>
<tr><td>&nbsp;</td><td>&nbsp;</td></tr>
<tr><td><a href="#FT_Outline_GetInsideBorder">FT_Outline_GetInsideBorder</a></td><td><a href="#FT_Stroker_LineTo">FT_Stroker_LineTo</a></td></tr>
<tr><td><a href="#FT_Outline_GetOutsideBorder">FT_Outline_GetOutsideBorder</a></td><td><a href="#FT_Stroker_ConicTo">FT_Stroker_ConicTo</a></td></tr>
<tr><td>&nbsp;</td><td><a href="#FT_Stroker_CubicTo">FT_Stroker_CubicTo</a></td></tr>
<tr><td><a href="#FT_Glyph_Stroke">FT_Glyph_Stroke</a></td><td>&nbsp;</td></tr>
<tr><td><a href="#FT_Glyph_StrokeBorder">FT_Glyph_StrokeBorder</a></td><td><a href="#FT_Stroker_GetBorderCounts">FT_Stroker_GetBorderCounts</a></td></tr>
<tr><td>&nbsp;</td><td><a href="#FT_Stroker_ExportBorder">FT_Stroker_ExportBorder</a></td></tr>
<tr><td><a href="#FT_Stroker_New">FT_Stroker_New</a></td><td><a href="#FT_Stroker_GetCounts">FT_Stroker_GetCounts</a></td></tr>
<tr><td><a href="#FT_Stroker_Set">FT_Stroker_Set</a></td><td><a href="#FT_Stroker_Export">FT_Stroker_Export</a></td></tr>
<tr><td><a href="#FT_Stroker_Rewind">FT_Stroker_Rewind</a></td><td></td></tr>
</table>
<p>This component generates stroked outlines of a given vectorial glyph. It also allows you to retrieve the &lsquo;outside&rsquo; and/or the &lsquo;inside&rsquo; borders of the stroke.</p>
<p>This can be useful to generate &lsquo;bordered&rsquo; glyph, i.e., glyphs displayed with a coloured (and anti-aliased) border around their shape.</p>
<div class="section">
<h3 id="FT_Stroker">FT_Stroker</h3>
<p>Defined in FT_STROKER_H (freetype/ftstroke.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_StrokerRec_* <b>FT_Stroker</b>;
</pre>
<p>Opaque handle to a path stroker object.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Stroker_LineJoin">FT_Stroker_LineJoin</h3>
<p>Defined in FT_STROKER_H (freetype/ftstroke.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">enum</span> FT_Stroker_LineJoin_
{
<a href="ft2-glyph_stroker.html#FT_STROKER_LINEJOIN_ROUND">FT_STROKER_LINEJOIN_ROUND</a> = 0,
<a href="ft2-glyph_stroker.html#FT_STROKER_LINEJOIN_BEVEL">FT_STROKER_LINEJOIN_BEVEL</a> = 1,
<a href="ft2-glyph_stroker.html#FT_STROKER_LINEJOIN_MITER_VARIABLE">FT_STROKER_LINEJOIN_MITER_VARIABLE</a> = 2,
<a href="ft2-glyph_stroker.html#FT_STROKER_LINEJOIN_MITER">FT_STROKER_LINEJOIN_MITER</a> = <a href="ft2-glyph_stroker.html#FT_STROKER_LINEJOIN_MITER_VARIABLE">FT_STROKER_LINEJOIN_MITER_VARIABLE</a>,
<a href="ft2-glyph_stroker.html#FT_STROKER_LINEJOIN_MITER_FIXED">FT_STROKER_LINEJOIN_MITER_FIXED</a> = 3
} <b>FT_Stroker_LineJoin</b>;
</pre>
<p>These values determine how two joining lines are rendered in a stroker.</p>
<h4>values</h4>
<table class="fields">
<tr><td class="val" id="FT_STROKER_LINEJOIN_ROUND">FT_STROKER_LINEJOIN_ROUND</td><td class="desc">
<p>Used to render rounded line joins. Circular arcs are used to join two lines smoothly.</p>
</td></tr>
<tr><td class="val" id="FT_STROKER_LINEJOIN_BEVEL">FT_STROKER_LINEJOIN_BEVEL</td><td class="desc">
<p>Used to render beveled line joins. The outer corner of the joined lines is filled by enclosing the triangular region of the corner with a straight line between the outer corners of each stroke.</p>
</td></tr>
<tr><td class="val" id="FT_STROKER_LINEJOIN_MITER_FIXED">FT_STROKER_LINEJOIN_MITER_FIXED</td><td class="desc">
<p>Used to render mitered line joins, with fixed bevels if the miter limit is exceeded. The outer edges of the strokes for the two segments are extended until they meet at an angle. If the segments meet at too sharp an angle (such that the miter would extend from the intersection of the segments a distance greater than the product of the miter limit value and the border radius), then a bevel join (see above) is used instead. This prevents long spikes being created. FT_STROKER_LINEJOIN_MITER_FIXED generates a miter line join as used in PostScript and PDF.</p>
</td></tr>
<tr><td class="val" id="FT_STROKER_LINEJOIN_MITER_VARIABLE">FT_STROKER_LINEJOIN_MITER_VARIABLE</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="FT_STROKER_LINEJOIN_MITER">FT_STROKER_LINEJOIN_MITER</td><td class="desc">
<p>Used to render mitered line joins, with variable bevels if the miter limit is exceeded. The intersection of the strokes is clipped at a line perpendicular to the bisector of the angle between the strokes, at the distance from the intersection of the segments equal to the product of the miter limit value and the border radius. This prevents long spikes being created. FT_STROKER_LINEJOIN_MITER_VARIABLE generates a mitered line join as used in XPS. FT_STROKER_LINEJOIN_MITER is an alias for FT_STROKER_LINEJOIN_MITER_VARIABLE, retained for backward compatibility.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Stroker_LineCap">FT_Stroker_LineCap</h3>
<p>Defined in FT_STROKER_H (freetype/ftstroke.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">enum</span> FT_Stroker_LineCap_
{
<a href="ft2-glyph_stroker.html#FT_STROKER_LINECAP_BUTT">FT_STROKER_LINECAP_BUTT</a> = 0,
<a href="ft2-glyph_stroker.html#FT_STROKER_LINECAP_ROUND">FT_STROKER_LINECAP_ROUND</a>,
<a href="ft2-glyph_stroker.html#FT_STROKER_LINECAP_SQUARE">FT_STROKER_LINECAP_SQUARE</a>
} <b>FT_Stroker_LineCap</b>;
</pre>
<p>These values determine how the end of opened sub-paths are rendered in a stroke.</p>
<h4>values</h4>
<table class="fields">
<tr><td class="val" id="FT_STROKER_LINECAP_BUTT">FT_STROKER_LINECAP_BUTT</td><td class="desc">
<p>The end of lines is rendered as a full stop on the last point itself.</p>
</td></tr>
<tr><td class="val" id="FT_STROKER_LINECAP_ROUND">FT_STROKER_LINECAP_ROUND</td><td class="desc">
<p>The end of lines is rendered as a half-circle around the last point.</p>
</td></tr>
<tr><td class="val" id="FT_STROKER_LINECAP_SQUARE">FT_STROKER_LINECAP_SQUARE</td><td class="desc">
<p>The end of lines is rendered as a square around the last point.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_StrokerBorder">FT_StrokerBorder</h3>
<p>Defined in FT_STROKER_H (freetype/ftstroke.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">enum</span> FT_StrokerBorder_
{
<a href="ft2-glyph_stroker.html#FT_STROKER_BORDER_LEFT">FT_STROKER_BORDER_LEFT</a> = 0,
<a href="ft2-glyph_stroker.html#FT_STROKER_BORDER_RIGHT">FT_STROKER_BORDER_RIGHT</a>
} <b>FT_StrokerBorder</b>;
</pre>
<p>These values are used to select a given stroke border in <a href="ft2-glyph_stroker.html#FT_Stroker_GetBorderCounts">FT_Stroker_GetBorderCounts</a> and <a href="ft2-glyph_stroker.html#FT_Stroker_ExportBorder">FT_Stroker_ExportBorder</a>.</p>
<h4>values</h4>
<table class="fields">
<tr><td class="val" id="FT_STROKER_BORDER_LEFT">FT_STROKER_BORDER_LEFT</td><td class="desc">
<p>Select the left border, relative to the drawing direction.</p>
</td></tr>
<tr><td class="val" id="FT_STROKER_BORDER_RIGHT">FT_STROKER_BORDER_RIGHT</td><td class="desc">
<p>Select the right border, relative to the drawing direction.</p>
</td></tr>
</table>
<h4>note</h4>
<p>Applications are generally interested in the &lsquo;inside&rsquo; and &lsquo;outside&rsquo; borders. However, there is no direct mapping between these and the &lsquo;left&rsquo; and &lsquo;right&rsquo; ones, since this really depends on the glyph's drawing orientation, which varies between font formats.</p>
<p>You can however use <a href="ft2-glyph_stroker.html#FT_Outline_GetInsideBorder">FT_Outline_GetInsideBorder</a> and <a href="ft2-glyph_stroker.html#FT_Outline_GetOutsideBorder">FT_Outline_GetOutsideBorder</a> to get these.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Outline_GetInsideBorder">FT_Outline_GetInsideBorder</h3>
<p>Defined in FT_STROKER_H (freetype/ftstroke.h).</p>
<pre>
FT_EXPORT( <a href="ft2-glyph_stroker.html#FT_StrokerBorder">FT_StrokerBorder</a> )
<b>FT_Outline_GetInsideBorder</b>( <a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a>* outline );
</pre>
<p>Retrieve the <a href="ft2-glyph_stroker.html#FT_StrokerBorder">FT_StrokerBorder</a> value corresponding to the &lsquo;inside&rsquo; borders of a given outline.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="outline">outline</td><td class="desc">
<p>The source outline handle.</p>
</td></tr>
</table>
<h4>return</h4>
<p>The border index. <a href="ft2-glyph_stroker.html#FT_StrokerBorder">FT_STROKER_BORDER_RIGHT</a> for empty or invalid outlines.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Outline_GetOutsideBorder">FT_Outline_GetOutsideBorder</h3>
<p>Defined in FT_STROKER_H (freetype/ftstroke.h).</p>
<pre>
FT_EXPORT( <a href="ft2-glyph_stroker.html#FT_StrokerBorder">FT_StrokerBorder</a> )
<b>FT_Outline_GetOutsideBorder</b>( <a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a>* outline );
</pre>
<p>Retrieve the <a href="ft2-glyph_stroker.html#FT_StrokerBorder">FT_StrokerBorder</a> value corresponding to the &lsquo;outside&rsquo; borders of a given outline.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="outline">outline</td><td class="desc">
<p>The source outline handle.</p>
</td></tr>
</table>
<h4>return</h4>
<p>The border index. <a href="ft2-glyph_stroker.html#FT_StrokerBorder">FT_STROKER_BORDER_LEFT</a> for empty or invalid outlines.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Glyph_Stroke">FT_Glyph_Stroke</h3>
<p>Defined in FT_STROKER_H (freetype/ftstroke.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Glyph_Stroke</b>( <a href="ft2-glyph_management.html#FT_Glyph">FT_Glyph</a> *pglyph,
<a href="ft2-glyph_stroker.html#FT_Stroker">FT_Stroker</a> stroker,
<a href="ft2-basic_types.html#FT_Bool">FT_Bool</a> destroy );
</pre>
<p>Stroke a given outline glyph object with a given stroker.</p>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="pglyph">pglyph</td><td class="desc">
<p>Source glyph handle on input, new glyph handle on output.</p>
</td></tr>
</table>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="stroker">stroker</td><td class="desc">
<p>A stroker handle.</p>
</td></tr>
<tr><td class="val" id="destroy">destroy</td><td class="desc">
<p>A Boolean. If&nbsp;1, the source glyph object is destroyed on success.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>The source glyph is untouched in case of error.</p>
<p>Adding stroke may yield a significantly wider and taller glyph depending on how large of a radius was used to stroke the glyph. You may need to manually adjust horizontal and vertical advance amounts to account for this added size.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Glyph_StrokeBorder">FT_Glyph_StrokeBorder</h3>
<p>Defined in FT_STROKER_H (freetype/ftstroke.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Glyph_StrokeBorder</b>( <a href="ft2-glyph_management.html#FT_Glyph">FT_Glyph</a> *pglyph,
<a href="ft2-glyph_stroker.html#FT_Stroker">FT_Stroker</a> stroker,
<a href="ft2-basic_types.html#FT_Bool">FT_Bool</a> inside,
<a href="ft2-basic_types.html#FT_Bool">FT_Bool</a> destroy );
</pre>
<p>Stroke a given outline glyph object with a given stroker, but only return either its inside or outside border.</p>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="pglyph">pglyph</td><td class="desc">
<p>Source glyph handle on input, new glyph handle on output.</p>
</td></tr>
</table>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="stroker">stroker</td><td class="desc">
<p>A stroker handle.</p>
</td></tr>
<tr><td class="val" id="inside">inside</td><td class="desc">
<p>A Boolean. If&nbsp;1, return the inside border, otherwise the outside border.</p>
</td></tr>
<tr><td class="val" id="destroy">destroy</td><td class="desc">
<p>A Boolean. If&nbsp;1, the source glyph object is destroyed on success.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>The source glyph is untouched in case of error.</p>
<p>Adding stroke may yield a significantly wider and taller glyph depending on how large of a radius was used to stroke the glyph. You may need to manually adjust horizontal and vertical advance amounts to account for this added size.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Stroker_New">FT_Stroker_New</h3>
<p>Defined in FT_STROKER_H (freetype/ftstroke.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Stroker_New</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library,
<a href="ft2-glyph_stroker.html#FT_Stroker">FT_Stroker</a> *astroker );
</pre>
<p>Create a new stroker object.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="library">library</td><td class="desc">
<p>FreeType library handle.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="astroker">astroker</td><td class="desc">
<p>A new stroker object handle. NULL in case of error.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Stroker_Set">FT_Stroker_Set</h3>
<p>Defined in FT_STROKER_H (freetype/ftstroke.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_Stroker_Set</b>( <a href="ft2-glyph_stroker.html#FT_Stroker">FT_Stroker</a> stroker,
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> radius,
<a href="ft2-glyph_stroker.html#FT_Stroker_LineCap">FT_Stroker_LineCap</a> line_cap,
<a href="ft2-glyph_stroker.html#FT_Stroker_LineJoin">FT_Stroker_LineJoin</a> line_join,
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> miter_limit );
</pre>
<p>Reset a stroker object's attributes.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="stroker">stroker</td><td class="desc">
<p>The target stroker handle.</p>
</td></tr>
<tr><td class="val" id="radius">radius</td><td class="desc">
<p>The border radius.</p>
</td></tr>
<tr><td class="val" id="line_cap">line_cap</td><td class="desc">
<p>The line cap style.</p>
</td></tr>
<tr><td class="val" id="line_join">line_join</td><td class="desc">
<p>The line join style.</p>
</td></tr>
<tr><td class="val" id="miter_limit">miter_limit</td><td class="desc">
<p>The miter limit for the FT_STROKER_LINEJOIN_MITER_FIXED and FT_STROKER_LINEJOIN_MITER_VARIABLE line join styles, expressed as 16.16 fixed-point value.</p>
</td></tr>
</table>
<h4>note</h4>
<p>The radius is expressed in the same units as the outline coordinates.</p>
<p>This function calls <a href="ft2-glyph_stroker.html#FT_Stroker_Rewind">FT_Stroker_Rewind</a> automatically.</p>
<hr>
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<div class="section">
<h3 id="FT_Stroker_Rewind">FT_Stroker_Rewind</h3>
<p>Defined in FT_STROKER_H (freetype/ftstroke.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_Stroker_Rewind</b>( <a href="ft2-glyph_stroker.html#FT_Stroker">FT_Stroker</a> stroker );
</pre>
<p>Reset a stroker object without changing its attributes. You should call this function before beginning a new series of calls to <a href="ft2-glyph_stroker.html#FT_Stroker_BeginSubPath">FT_Stroker_BeginSubPath</a> or <a href="ft2-glyph_stroker.html#FT_Stroker_EndSubPath">FT_Stroker_EndSubPath</a>.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="stroker">stroker</td><td class="desc">
<p>The target stroker handle.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Stroker_ParseOutline">FT_Stroker_ParseOutline</h3>
<p>Defined in FT_STROKER_H (freetype/ftstroke.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Stroker_ParseOutline</b>( <a href="ft2-glyph_stroker.html#FT_Stroker">FT_Stroker</a> stroker,
<a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a>* outline,
<a href="ft2-basic_types.html#FT_Bool">FT_Bool</a> opened );
</pre>
<p>A convenience function used to parse a whole outline with the stroker. The resulting outline(s) can be retrieved later by functions like <a href="ft2-glyph_stroker.html#FT_Stroker_GetCounts">FT_Stroker_GetCounts</a> and <a href="ft2-glyph_stroker.html#FT_Stroker_Export">FT_Stroker_Export</a>.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="stroker">stroker</td><td class="desc">
<p>The target stroker handle.</p>
</td></tr>
<tr><td class="val" id="outline">outline</td><td class="desc">
<p>The source outline.</p>
</td></tr>
<tr><td class="val" id="opened">opened</td><td class="desc">
<p>A boolean. If&nbsp;1, the outline is treated as an open path instead of a closed one.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>If &lsquo;opened&rsquo; is&nbsp;0 (the default), the outline is treated as a closed path, and the stroker generates two distinct &lsquo;border&rsquo; outlines.</p>
<p>If &lsquo;opened&rsquo; is&nbsp;1, the outline is processed as an open path, and the stroker generates a single &lsquo;stroke&rsquo; outline.</p>
<p>This function calls <a href="ft2-glyph_stroker.html#FT_Stroker_Rewind">FT_Stroker_Rewind</a> automatically.</p>
<hr>
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<div class="section">
<h3 id="FT_Stroker_Done">FT_Stroker_Done</h3>
<p>Defined in FT_STROKER_H (freetype/ftstroke.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_Stroker_Done</b>( <a href="ft2-glyph_stroker.html#FT_Stroker">FT_Stroker</a> stroker );
</pre>
<p>Destroy a stroker object.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="stroker">stroker</td><td class="desc">
<p>A stroker handle. Can be NULL.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Stroker_BeginSubPath">FT_Stroker_BeginSubPath</h3>
<p>Defined in FT_STROKER_H (freetype/ftstroke.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Stroker_BeginSubPath</b>( <a href="ft2-glyph_stroker.html#FT_Stroker">FT_Stroker</a> stroker,
<a href="ft2-basic_types.html#FT_Vector">FT_Vector</a>* to,
<a href="ft2-basic_types.html#FT_Bool">FT_Bool</a> open );
</pre>
<p>Start a new sub-path in the stroker.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="stroker">stroker</td><td class="desc">
<p>The target stroker handle.</p>
</td></tr>
<tr><td class="val" id="to">to</td><td class="desc">
<p>A pointer to the start vector.</p>
</td></tr>
<tr><td class="val" id="open">open</td><td class="desc">
<p>A boolean. If&nbsp;1, the sub-path is treated as an open one.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>This function is useful when you need to stroke a path that is not stored as an <a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a> object.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Stroker_EndSubPath">FT_Stroker_EndSubPath</h3>
<p>Defined in FT_STROKER_H (freetype/ftstroke.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Stroker_EndSubPath</b>( <a href="ft2-glyph_stroker.html#FT_Stroker">FT_Stroker</a> stroker );
</pre>
<p>Close the current sub-path in the stroker.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="stroker">stroker</td><td class="desc">
<p>The target stroker handle.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>You should call this function after <a href="ft2-glyph_stroker.html#FT_Stroker_BeginSubPath">FT_Stroker_BeginSubPath</a>. If the subpath was not &lsquo;opened&rsquo;, this function &lsquo;draws&rsquo; a single line segment to the start position when needed.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Stroker_LineTo">FT_Stroker_LineTo</h3>
<p>Defined in FT_STROKER_H (freetype/ftstroke.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Stroker_LineTo</b>( <a href="ft2-glyph_stroker.html#FT_Stroker">FT_Stroker</a> stroker,
<a href="ft2-basic_types.html#FT_Vector">FT_Vector</a>* to );
</pre>
<p>&lsquo;Draw&rsquo; a single line segment in the stroker's current sub-path, from the last position.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="stroker">stroker</td><td class="desc">
<p>The target stroker handle.</p>
</td></tr>
<tr><td class="val" id="to">to</td><td class="desc">
<p>A pointer to the destination point.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>You should call this function between <a href="ft2-glyph_stroker.html#FT_Stroker_BeginSubPath">FT_Stroker_BeginSubPath</a> and <a href="ft2-glyph_stroker.html#FT_Stroker_EndSubPath">FT_Stroker_EndSubPath</a>.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Stroker_ConicTo">FT_Stroker_ConicTo</h3>
<p>Defined in FT_STROKER_H (freetype/ftstroke.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Stroker_ConicTo</b>( <a href="ft2-glyph_stroker.html#FT_Stroker">FT_Stroker</a> stroker,
<a href="ft2-basic_types.html#FT_Vector">FT_Vector</a>* control,
<a href="ft2-basic_types.html#FT_Vector">FT_Vector</a>* to );
</pre>
<p>&lsquo;Draw&rsquo; a single quadratic Bézier in the stroker's current sub-path, from the last position.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="stroker">stroker</td><td class="desc">
<p>The target stroker handle.</p>
</td></tr>
<tr><td class="val" id="control">control</td><td class="desc">
<p>A pointer to a Bézier control point.</p>
</td></tr>
<tr><td class="val" id="to">to</td><td class="desc">
<p>A pointer to the destination point.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>You should call this function between <a href="ft2-glyph_stroker.html#FT_Stroker_BeginSubPath">FT_Stroker_BeginSubPath</a> and <a href="ft2-glyph_stroker.html#FT_Stroker_EndSubPath">FT_Stroker_EndSubPath</a>.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Stroker_CubicTo">FT_Stroker_CubicTo</h3>
<p>Defined in FT_STROKER_H (freetype/ftstroke.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Stroker_CubicTo</b>( <a href="ft2-glyph_stroker.html#FT_Stroker">FT_Stroker</a> stroker,
<a href="ft2-basic_types.html#FT_Vector">FT_Vector</a>* control1,
<a href="ft2-basic_types.html#FT_Vector">FT_Vector</a>* control2,
<a href="ft2-basic_types.html#FT_Vector">FT_Vector</a>* to );
</pre>
<p>&lsquo;Draw&rsquo; a single cubic Bézier in the stroker's current sub-path, from the last position.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="stroker">stroker</td><td class="desc">
<p>The target stroker handle.</p>
</td></tr>
<tr><td class="val" id="control1">control1</td><td class="desc">
<p>A pointer to the first Bézier control point.</p>
</td></tr>
<tr><td class="val" id="control2">control2</td><td class="desc">
<p>A pointer to second Bézier control point.</p>
</td></tr>
<tr><td class="val" id="to">to</td><td class="desc">
<p>A pointer to the destination point.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>You should call this function between <a href="ft2-glyph_stroker.html#FT_Stroker_BeginSubPath">FT_Stroker_BeginSubPath</a> and <a href="ft2-glyph_stroker.html#FT_Stroker_EndSubPath">FT_Stroker_EndSubPath</a>.</p>
<hr>
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<div class="section">
<h3 id="FT_Stroker_GetBorderCounts">FT_Stroker_GetBorderCounts</h3>
<p>Defined in FT_STROKER_H (freetype/ftstroke.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Stroker_GetBorderCounts</b>( <a href="ft2-glyph_stroker.html#FT_Stroker">FT_Stroker</a> stroker,
<a href="ft2-glyph_stroker.html#FT_StrokerBorder">FT_StrokerBorder</a> border,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> *anum_points,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> *anum_contours );
</pre>
<p>Call this function once you have finished parsing your paths with the stroker. It returns the number of points and contours necessary to export one of the &lsquo;border&rsquo; or &lsquo;stroke&rsquo; outlines generated by the stroker.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="stroker">stroker</td><td class="desc">
<p>The target stroker handle.</p>
</td></tr>
<tr><td class="val" id="border">border</td><td class="desc">
<p>The border index.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="anum_points">anum_points</td><td class="desc">
<p>The number of points.</p>
</td></tr>
<tr><td class="val" id="anum_contours">anum_contours</td><td class="desc">
<p>The number of contours.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>When an outline, or a sub-path, is &lsquo;closed&rsquo;, the stroker generates two independent &lsquo;border&rsquo; outlines, named &lsquo;left&rsquo; and &lsquo;right&rsquo;.</p>
<p>When the outline, or a sub-path, is &lsquo;opened&rsquo;, the stroker merges the &lsquo;border&rsquo; outlines with caps. The &lsquo;left&rsquo; border receives all points, while the &lsquo;right&rsquo; border becomes empty.</p>
<p>Use the function <a href="ft2-glyph_stroker.html#FT_Stroker_GetCounts">FT_Stroker_GetCounts</a> instead if you want to retrieve the counts associated to both borders.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Stroker_ExportBorder">FT_Stroker_ExportBorder</h3>
<p>Defined in FT_STROKER_H (freetype/ftstroke.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_Stroker_ExportBorder</b>( <a href="ft2-glyph_stroker.html#FT_Stroker">FT_Stroker</a> stroker,
<a href="ft2-glyph_stroker.html#FT_StrokerBorder">FT_StrokerBorder</a> border,
<a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a>* outline );
</pre>
<p>Call this function after <a href="ft2-glyph_stroker.html#FT_Stroker_GetBorderCounts">FT_Stroker_GetBorderCounts</a> to export the corresponding border to your own <a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a> structure.</p>
<p>Note that this function appends the border points and contours to your outline, but does not try to resize its arrays.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="stroker">stroker</td><td class="desc">
<p>The target stroker handle.</p>
</td></tr>
<tr><td class="val" id="border">border</td><td class="desc">
<p>The border index.</p>
</td></tr>
<tr><td class="val" id="outline">outline</td><td class="desc">
<p>The target outline handle.</p>
</td></tr>
</table>
<h4>note</h4>
<p>Always call this function after <a href="ft2-glyph_stroker.html#FT_Stroker_GetBorderCounts">FT_Stroker_GetBorderCounts</a> to get sure that there is enough room in your <a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a> object to receive all new data.</p>
<p>When an outline, or a sub-path, is &lsquo;closed&rsquo;, the stroker generates two independent &lsquo;border&rsquo; outlines, named &lsquo;left&rsquo; and &lsquo;right&rsquo;.</p>
<p>When the outline, or a sub-path, is &lsquo;opened&rsquo;, the stroker merges the &lsquo;border&rsquo; outlines with caps. The &lsquo;left&rsquo; border receives all points, while the &lsquo;right&rsquo; border becomes empty.</p>
<p>Use the function <a href="ft2-glyph_stroker.html#FT_Stroker_Export">FT_Stroker_Export</a> instead if you want to retrieve all borders at once.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Stroker_GetCounts">FT_Stroker_GetCounts</h3>
<p>Defined in FT_STROKER_H (freetype/ftstroke.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Stroker_GetCounts</b>( <a href="ft2-glyph_stroker.html#FT_Stroker">FT_Stroker</a> stroker,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> *anum_points,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> *anum_contours );
</pre>
<p>Call this function once you have finished parsing your paths with the stroker. It returns the number of points and contours necessary to export all points/borders from the stroked outline/path.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="stroker">stroker</td><td class="desc">
<p>The target stroker handle.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="anum_points">anum_points</td><td class="desc">
<p>The number of points.</p>
</td></tr>
<tr><td class="val" id="anum_contours">anum_contours</td><td class="desc">
<p>The number of contours.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Stroker_Export">FT_Stroker_Export</h3>
<p>Defined in FT_STROKER_H (freetype/ftstroke.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_Stroker_Export</b>( <a href="ft2-glyph_stroker.html#FT_Stroker">FT_Stroker</a> stroker,
<a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a>* outline );
</pre>
<p>Call this function after <a href="ft2-glyph_stroker.html#FT_Stroker_GetBorderCounts">FT_Stroker_GetBorderCounts</a> to export all borders to your own <a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a> structure.</p>
<p>Note that this function appends the border points and contours to your outline, but does not try to resize its arrays.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="stroker">stroker</td><td class="desc">
<p>The target stroker handle.</p>
</td></tr>
<tr><td class="val" id="outline">outline</td><td class="desc">
<p>The target outline handle.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
</body>
</html>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="glyph_variants">Unicode Variation Sequences</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_Face_GetCharVariantIndex">FT_Face_GetCharVariantIndex</a></td><td><a href="#FT_Face_GetVariantsOfChar">FT_Face_GetVariantsOfChar</a></td></tr>
<tr><td><a href="#FT_Face_GetCharVariantIsDefault">FT_Face_GetCharVariantIsDefault</a></td><td><a href="#FT_Face_GetCharsOfVariant">FT_Face_GetCharsOfVariant</a></td></tr>
<tr><td><a href="#FT_Face_GetVariantSelectors">FT_Face_GetVariantSelectors</a></td><td></td></tr>
</table>
<p>Many characters, especially for CJK scripts, have variant forms. They are a sort of grey area somewhere between being totally irrelevant and semantically distinct; for this reason, the Unicode consortium decided to introduce Variation Sequences (VS), consisting of a Unicode base character and a variation selector instead of further extending the already huge number of characters.</p>
<p>Unicode maintains two different sets, namely &lsquo;Standardized Variation Sequences&rsquo; and registered &lsquo;Ideographic Variation Sequences&rsquo; (IVS), collected in the &lsquo;Ideographic Variation Database&rsquo; (IVD).</p>
<p><a href="http://unicode.org/Public/UCD/latest/ucd/StandardizedVariants.txt">http://unicode.org/Public/UCD/latest/ucd/StandardizedVariants.txt</a> <a href="http://unicode.org/reports/tr37/">http://unicode.org/reports/tr37/</a> <a href="http://unicode.org/ivd/">http://unicode.org/ivd/</a></p>
<p>To date (January 2017), the character with the most ideographic variations is U+9089, having 32 such IVS.</p>
<p>Three Mongolian Variation Selectors have the values U+180B-U+180D; 256 generic Variation Selectors are encoded in the ranges U+FE00-U+FE0F and U+E0100-U+E01EF. IVS currently use Variation Selectors from the range U+E0100-U+E01EF only.</p>
<p>A VS consists of the base character value followed by a single Variation Selector. For example, to get the first variation of U+9089, you have to write the character sequence &lsquo;U+9089 U+E0100&rsquo;.</p>
<p>Adobe and MS decided to support both standardized and ideographic VS with a new cmap subtable (format&nbsp;14). It is an odd subtable because it is not a mapping of input code points to glyphs, but contains lists of all variations supported by the font.</p>
<p>A variation may be either &lsquo;default&rsquo; or &lsquo;non-default&rsquo; for a given font. A default variation is the one you will get for that code point if you look it up in the standard Unicode cmap. A non-default variation is a different glyph.</p>
<div class="section">
<h3 id="FT_Face_GetCharVariantIndex">FT_Face_GetCharVariantIndex</h3>
<p>Defined in FT_FREETYPE_H (freetype/freetype.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> )
<b>FT_Face_GetCharVariantIndex</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_ULong">FT_ULong</a> charcode,
<a href="ft2-basic_types.html#FT_ULong">FT_ULong</a> variantSelector );
</pre>
<p>Return the glyph index of a given character code as modified by the variation selector.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to the source face object.</p>
</td></tr>
<tr><td class="val" id="charcode">charcode</td><td class="desc">
<p>The character code point in Unicode.</p>
</td></tr>
<tr><td class="val" id="variantSelector">variantSelector</td><td class="desc">
<p>The Unicode code point of the variation selector.</p>
</td></tr>
</table>
<h4>return</h4>
<p>The glyph index. 0&nbsp;means either &lsquo;undefined character code&rsquo;, or &lsquo;undefined selector code&rsquo;, or &lsquo;no variation selector cmap subtable&rsquo;, or &lsquo;current CharMap is not Unicode&rsquo;.</p>
<h4>note</h4>
<p>If you use FreeType to manipulate the contents of font files directly, be aware that the glyph index returned by this function doesn't always correspond to the internal indices used within the file. This is done to ensure that value&nbsp;0 always corresponds to the &lsquo;missing glyph&rsquo;.</p>
<p>This function is only meaningful if a) the font has a variation selector cmap sub table, and b) the current charmap has a Unicode encoding.</p>
<h4>since</h4>
<p>2.3.6</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Face_GetCharVariantIsDefault">FT_Face_GetCharVariantIsDefault</h3>
<p>Defined in FT_FREETYPE_H (freetype/freetype.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Int">FT_Int</a> )
<b>FT_Face_GetCharVariantIsDefault</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_ULong">FT_ULong</a> charcode,
<a href="ft2-basic_types.html#FT_ULong">FT_ULong</a> variantSelector );
</pre>
<p>Check whether this variation of this Unicode character is the one to be found in the &lsquo;cmap&rsquo;.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to the source face object.</p>
</td></tr>
<tr><td class="val" id="charcode">charcode</td><td class="desc">
<p>The character codepoint in Unicode.</p>
</td></tr>
<tr><td class="val" id="variantSelector">variantSelector</td><td class="desc">
<p>The Unicode codepoint of the variation selector.</p>
</td></tr>
</table>
<h4>return</h4>
<p>1&nbsp;if found in the standard (Unicode) cmap, 0&nbsp;if found in the variation selector cmap, or -1 if it is not a variation.</p>
<h4>note</h4>
<p>This function is only meaningful if the font has a variation selector cmap subtable.</p>
<h4>since</h4>
<p>2.3.6</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Face_GetVariantSelectors">FT_Face_GetVariantSelectors</h3>
<p>Defined in FT_FREETYPE_H (freetype/freetype.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_UInt32">FT_UInt32</a>* )
<b>FT_Face_GetVariantSelectors</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face );
</pre>
<p>Return a zero-terminated list of Unicode variation selectors found in the font.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to the source face object.</p>
</td></tr>
</table>
<h4>return</h4>
<p>A pointer to an array of selector code points, or NULL if there is no valid variation selector cmap subtable.</p>
<h4>note</h4>
<p>The last item in the array is&nbsp;0; the array is owned by the <a href="ft2-base_interface.html#FT_Face">FT_Face</a> object but can be overwritten or released on the next call to a FreeType function.</p>
<h4>since</h4>
<p>2.3.6</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Face_GetVariantsOfChar">FT_Face_GetVariantsOfChar</h3>
<p>Defined in FT_FREETYPE_H (freetype/freetype.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_UInt32">FT_UInt32</a>* )
<b>FT_Face_GetVariantsOfChar</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_ULong">FT_ULong</a> charcode );
</pre>
<p>Return a zero-terminated list of Unicode variation selectors found for the specified character code.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to the source face object.</p>
</td></tr>
<tr><td class="val" id="charcode">charcode</td><td class="desc">
<p>The character codepoint in Unicode.</p>
</td></tr>
</table>
<h4>return</h4>
<p>A pointer to an array of variation selector code points that are active for the given character, or NULL if the corresponding list is empty.</p>
<h4>note</h4>
<p>The last item in the array is&nbsp;0; the array is owned by the <a href="ft2-base_interface.html#FT_Face">FT_Face</a> object but can be overwritten or released on the next call to a FreeType function.</p>
<h4>since</h4>
<p>2.3.6</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Face_GetCharsOfVariant">FT_Face_GetCharsOfVariant</h3>
<p>Defined in FT_FREETYPE_H (freetype/freetype.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_UInt32">FT_UInt32</a>* )
<b>FT_Face_GetCharsOfVariant</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_ULong">FT_ULong</a> variantSelector );
</pre>
<p>Return a zero-terminated list of Unicode character codes found for the specified variation selector.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to the source face object.</p>
</td></tr>
<tr><td class="val" id="variantSelector">variantSelector</td><td class="desc">
<p>The variation selector code point in Unicode.</p>
</td></tr>
</table>
<h4>return</h4>
<p>A list of all the code points that are specified by this selector (both default and non-default codes are returned) or NULL if there is no valid cmap or the variation selector is invalid.</p>
<h4>note</h4>
<p>The last item in the array is&nbsp;0; the array is owned by the <a href="ft2-base_interface.html#FT_Face">FT_Face</a> object but can be overwritten or released on the next call to a FreeType function.</p>
<h4>since</h4>
<p>2.3.6</p>
<hr>
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<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table>
<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="gx_validation">TrueTypeGX/AAT Validation</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_TrueTypeGX_Validate">FT_TrueTypeGX_Validate</a></td><td><a href="#FT_ClassicKern_Validate">FT_ClassicKern_Validate</a></td><td><a href="#FT_VALIDATE_GX_LENGTH">FT_VALIDATE_GX_LENGTH</a></td></tr>
<tr><td><a href="#FT_TrueTypeGX_Free">FT_TrueTypeGX_Free</a></td><td><a href="#FT_ClassicKern_Free">FT_ClassicKern_Free</a></td><td><a href="#FT_VALIDATE_GXXXX">FT_VALIDATE_GXXXX</a></td></tr>
<tr><td>&nbsp;</td><td>&nbsp;</td><td><a href="#FT_VALIDATE_CKERNXXX">FT_VALIDATE_CKERNXXX</a></td></tr>
</table>
<p>This section contains the declaration of functions to validate some TrueTypeGX tables (feat, mort, morx, bsln, just, kern, opbd, trak, prop, lcar).</p>
<div class="section">
<h3 id="FT_TrueTypeGX_Validate">FT_TrueTypeGX_Validate</h3>
<p>Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_TrueTypeGX_Validate</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> validation_flags,
<a href="ft2-basic_types.html#FT_Bytes">FT_Bytes</a> tables[<a href="ft2-gx_validation.html#FT_VALIDATE_GX_LENGTH">FT_VALIDATE_GX_LENGTH</a>],
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> table_length );
</pre>
<p>Validate various TrueTypeGX tables to assure that all offsets and indices are valid. The idea is that a higher-level library that actually does the text layout can access those tables without error checking (which can be quite time consuming).</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to the input face.</p>
</td></tr>
<tr><td class="val" id="validation_flags">validation_flags</td><td class="desc">
<p>A bit field that specifies the tables to be validated. See <a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_GXXXX</a> for possible values.</p>
</td></tr>
<tr><td class="val" id="table_length">table_length</td><td class="desc">
<p>The size of the &lsquo;tables&rsquo; array. Normally, <a href="ft2-gx_validation.html#FT_VALIDATE_GX_LENGTH">FT_VALIDATE_GX_LENGTH</a> should be passed.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="tables">tables</td><td class="desc">
<p>The array where all validated sfnt tables are stored. The array itself must be allocated by a client.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>This function only works with TrueTypeGX fonts, returning an error otherwise.</p>
<p>After use, the application should deallocate the buffers pointed to by each &lsquo;tables&rsquo; element, by calling <a href="ft2-gx_validation.html#FT_TrueTypeGX_Free">FT_TrueTypeGX_Free</a>. A NULL value indicates that the table either doesn't exist in the font, the application hasn't asked for validation, or the validator doesn't have the ability to validate the sfnt table.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_TrueTypeGX_Free">FT_TrueTypeGX_Free</h3>
<p>Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_TrueTypeGX_Free</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_Bytes">FT_Bytes</a> table );
</pre>
<p>Free the buffer allocated by TrueTypeGX validator.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to the input face.</p>
</td></tr>
<tr><td class="val" id="table">table</td><td class="desc">
<p>The pointer to the buffer allocated by <a href="ft2-gx_validation.html#FT_TrueTypeGX_Validate">FT_TrueTypeGX_Validate</a>.</p>
</td></tr>
</table>
<h4>note</h4>
<p>This function must be used to free the buffer allocated by <a href="ft2-gx_validation.html#FT_TrueTypeGX_Validate">FT_TrueTypeGX_Validate</a> only.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_ClassicKern_Validate">FT_ClassicKern_Validate</h3>
<p>Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_ClassicKern_Validate</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> validation_flags,
<a href="ft2-basic_types.html#FT_Bytes">FT_Bytes</a> *ckern_table );
</pre>
<p>Validate classic (16-bit format) kern table to assure that the offsets and indices are valid. The idea is that a higher-level library that actually does the text layout can access those tables without error checking (which can be quite time consuming).</p>
<p>The &lsquo;kern&rsquo; table validator in <a href="ft2-gx_validation.html#FT_TrueTypeGX_Validate">FT_TrueTypeGX_Validate</a> deals with both the new 32-bit format and the classic 16-bit format, while FT_ClassicKern_Validate only supports the classic 16-bit format.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to the input face.</p>
</td></tr>
<tr><td class="val" id="validation_flags">validation_flags</td><td class="desc">
<p>A bit field that specifies the dialect to be validated. See <a href="ft2-gx_validation.html#FT_VALIDATE_CKERNXXX">FT_VALIDATE_CKERNXXX</a> for possible values.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="ckern_table">ckern_table</td><td class="desc">
<p>A pointer to the kern table.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>After use, the application should deallocate the buffers pointed to by &lsquo;ckern_table&rsquo;, by calling <a href="ft2-gx_validation.html#FT_ClassicKern_Free">FT_ClassicKern_Free</a>. A NULL value indicates that the table doesn't exist in the font.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_ClassicKern_Free">FT_ClassicKern_Free</h3>
<p>Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_ClassicKern_Free</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_Bytes">FT_Bytes</a> table );
</pre>
<p>Free the buffer allocated by classic Kern validator.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to the input face.</p>
</td></tr>
<tr><td class="val" id="table">table</td><td class="desc">
<p>The pointer to the buffer that is allocated by <a href="ft2-gx_validation.html#FT_ClassicKern_Validate">FT_ClassicKern_Validate</a>.</p>
</td></tr>
</table>
<h4>note</h4>
<p>This function must be used to free the buffer allocated by <a href="ft2-gx_validation.html#FT_ClassicKern_Validate">FT_ClassicKern_Validate</a> only.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_VALIDATE_GX_LENGTH">FT_VALIDATE_GX_LENGTH</h3>
<p>Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h).</p>
<pre>
#define <b>FT_VALIDATE_GX_LENGTH</b> (FT_VALIDATE_GX_LAST_INDEX + 1)
</pre>
<p>The number of tables checked in this module. Use it as a parameter for the &lsquo;table-length&rsquo; argument of function <a href="ft2-gx_validation.html#FT_TrueTypeGX_Validate">FT_TrueTypeGX_Validate</a>.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_VALIDATE_GXXXX">FT_VALIDATE_GXXXX</h3>
<p>Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h).</p>
<pre>
#define <a href="ft2-gx_validation.html#FT_VALIDATE_feat">FT_VALIDATE_feat</a> FT_VALIDATE_GX_BITFIELD( feat )
#define <a href="ft2-gx_validation.html#FT_VALIDATE_mort">FT_VALIDATE_mort</a> FT_VALIDATE_GX_BITFIELD( mort )
#define <a href="ft2-gx_validation.html#FT_VALIDATE_morx">FT_VALIDATE_morx</a> FT_VALIDATE_GX_BITFIELD( morx )
#define <a href="ft2-gx_validation.html#FT_VALIDATE_bsln">FT_VALIDATE_bsln</a> FT_VALIDATE_GX_BITFIELD( bsln )
#define <a href="ft2-gx_validation.html#FT_VALIDATE_just">FT_VALIDATE_just</a> FT_VALIDATE_GX_BITFIELD( just )
#define <a href="ft2-gx_validation.html#FT_VALIDATE_kern">FT_VALIDATE_kern</a> FT_VALIDATE_GX_BITFIELD( kern )
#define <a href="ft2-gx_validation.html#FT_VALIDATE_opbd">FT_VALIDATE_opbd</a> FT_VALIDATE_GX_BITFIELD( opbd )
#define <a href="ft2-gx_validation.html#FT_VALIDATE_trak">FT_VALIDATE_trak</a> FT_VALIDATE_GX_BITFIELD( trak )
#define <a href="ft2-gx_validation.html#FT_VALIDATE_prop">FT_VALIDATE_prop</a> FT_VALIDATE_GX_BITFIELD( prop )
#define <a href="ft2-gx_validation.html#FT_VALIDATE_lcar">FT_VALIDATE_lcar</a> FT_VALIDATE_GX_BITFIELD( lcar )
#define <a href="ft2-gx_validation.html#FT_VALIDATE_GX">FT_VALIDATE_GX</a> ( <a href="ft2-gx_validation.html#FT_VALIDATE_feat">FT_VALIDATE_feat</a> | \
<a href="ft2-gx_validation.html#FT_VALIDATE_mort">FT_VALIDATE_mort</a> | \
<a href="ft2-gx_validation.html#FT_VALIDATE_morx">FT_VALIDATE_morx</a> | \
<a href="ft2-gx_validation.html#FT_VALIDATE_bsln">FT_VALIDATE_bsln</a> | \
<a href="ft2-gx_validation.html#FT_VALIDATE_just">FT_VALIDATE_just</a> | \
<a href="ft2-gx_validation.html#FT_VALIDATE_kern">FT_VALIDATE_kern</a> | \
<a href="ft2-gx_validation.html#FT_VALIDATE_opbd">FT_VALIDATE_opbd</a> | \
<a href="ft2-gx_validation.html#FT_VALIDATE_trak">FT_VALIDATE_trak</a> | \
<a href="ft2-gx_validation.html#FT_VALIDATE_prop">FT_VALIDATE_prop</a> | \
<a href="ft2-gx_validation.html#FT_VALIDATE_lcar">FT_VALIDATE_lcar</a> )
</pre>
<p>A list of bit-field constants used with <a href="ft2-gx_validation.html#FT_TrueTypeGX_Validate">FT_TrueTypeGX_Validate</a> to indicate which TrueTypeGX/AAT Type tables should be validated.</p>
<h4>values</h4>
<table class="fields">
<tr><td class="val" id="FT_VALIDATE_feat">FT_VALIDATE_feat</td><td class="desc">
<p>Validate &lsquo;feat&rsquo; table.</p>
</td></tr>
<tr><td class="val" id="FT_VALIDATE_mort">FT_VALIDATE_mort</td><td class="desc">
<p>Validate &lsquo;mort&rsquo; table.</p>
</td></tr>
<tr><td class="val" id="FT_VALIDATE_morx">FT_VALIDATE_morx</td><td class="desc">
<p>Validate &lsquo;morx&rsquo; table.</p>
</td></tr>
<tr><td class="val" id="FT_VALIDATE_bsln">FT_VALIDATE_bsln</td><td class="desc">
<p>Validate &lsquo;bsln&rsquo; table.</p>
</td></tr>
<tr><td class="val" id="FT_VALIDATE_just">FT_VALIDATE_just</td><td class="desc">
<p>Validate &lsquo;just&rsquo; table.</p>
</td></tr>
<tr><td class="val" id="FT_VALIDATE_kern">FT_VALIDATE_kern</td><td class="desc">
<p>Validate &lsquo;kern&rsquo; table.</p>
</td></tr>
<tr><td class="val" id="FT_VALIDATE_opbd">FT_VALIDATE_opbd</td><td class="desc">
<p>Validate &lsquo;opbd&rsquo; table.</p>
</td></tr>
<tr><td class="val" id="FT_VALIDATE_trak">FT_VALIDATE_trak</td><td class="desc">
<p>Validate &lsquo;trak&rsquo; table.</p>
</td></tr>
<tr><td class="val" id="FT_VALIDATE_prop">FT_VALIDATE_prop</td><td class="desc">
<p>Validate &lsquo;prop&rsquo; table.</p>
</td></tr>
<tr><td class="val" id="FT_VALIDATE_lcar">FT_VALIDATE_lcar</td><td class="desc">
<p>Validate &lsquo;lcar&rsquo; table.</p>
</td></tr>
<tr><td class="val" id="FT_VALIDATE_GX">FT_VALIDATE_GX</td><td class="desc">
<p>Validate all TrueTypeGX tables (feat, mort, morx, bsln, just, kern, opbd, trak, prop and lcar).</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_VALIDATE_CKERNXXX">FT_VALIDATE_CKERNXXX</h3>
<p>Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h).</p>
<pre>
#define <a href="ft2-gx_validation.html#FT_VALIDATE_MS">FT_VALIDATE_MS</a> ( FT_VALIDATE_GX_START &lt;&lt; 0 )
#define <a href="ft2-gx_validation.html#FT_VALIDATE_APPLE">FT_VALIDATE_APPLE</a> ( FT_VALIDATE_GX_START &lt;&lt; 1 )
#define <a href="ft2-gx_validation.html#FT_VALIDATE_CKERN">FT_VALIDATE_CKERN</a> ( <a href="ft2-gx_validation.html#FT_VALIDATE_MS">FT_VALIDATE_MS</a> | <a href="ft2-gx_validation.html#FT_VALIDATE_APPLE">FT_VALIDATE_APPLE</a> )
</pre>
<p>A list of bit-field constants used with <a href="ft2-gx_validation.html#FT_ClassicKern_Validate">FT_ClassicKern_Validate</a> to indicate the classic kern dialect or dialects. If the selected type doesn't fit, <a href="ft2-gx_validation.html#FT_ClassicKern_Validate">FT_ClassicKern_Validate</a> regards the table as invalid.</p>
<h4>values</h4>
<table class="fields">
<tr><td class="val" id="FT_VALIDATE_MS">FT_VALIDATE_MS</td><td class="desc">
<p>Handle the &lsquo;kern&rsquo; table as a classic Microsoft kern table.</p>
</td></tr>
<tr><td class="val" id="FT_VALIDATE_APPLE">FT_VALIDATE_APPLE</td><td class="desc">
<p>Handle the &lsquo;kern&rsquo; table as a classic Apple kern table.</p>
</td></tr>
<tr><td class="val" id="FT_VALIDATE_CKERN">FT_VALIDATE_CKERN</td><td class="desc">
<p>Handle the &lsquo;kern&rsquo; as either classic Apple or Microsoft kern table.</p>
</td></tr>
</table>
<hr>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="gzip">GZIP Streams</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_Stream_OpenGzip">FT_Stream_OpenGzip</a></td><td><a href="#FT_Gzip_Uncompress">FT_Gzip_Uncompress</a></td><td></td></tr>
</table>
<p>This section contains the declaration of Gzip-specific functions.</p>
<div class="section">
<h3 id="FT_Stream_OpenGzip">FT_Stream_OpenGzip</h3>
<p>Defined in FT_GZIP_H (freetype/ftgzip.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Stream_OpenGzip</b>( <a href="ft2-system_interface.html#FT_Stream">FT_Stream</a> stream,
<a href="ft2-system_interface.html#FT_Stream">FT_Stream</a> source );
</pre>
<p>Open a new stream to parse gzip-compressed font files. This is mainly used to support the compressed &lsquo;*.pcf.gz&rsquo; fonts that come with XFree86.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="stream">stream</td><td class="desc">
<p>The target embedding stream.</p>
</td></tr>
<tr><td class="val" id="source">source</td><td class="desc">
<p>The source stream.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>The source stream must be opened <i>before</i> calling this function.</p>
<p>Calling the internal function &lsquo;FT_Stream_Close&rsquo; on the new stream will <b>not</b> call &lsquo;FT_Stream_Close&rsquo; on the source stream. None of the stream objects will be released to the heap.</p>
<p>The stream implementation is very basic and resets the decompression process each time seeking backwards is needed within the stream.</p>
<p>In certain builds of the library, gzip compression recognition is automatically handled when calling <a href="ft2-base_interface.html#FT_New_Face">FT_New_Face</a> or <a href="ft2-base_interface.html#FT_Open_Face">FT_Open_Face</a>. This means that if no font driver is capable of handling the raw compressed file, the library will try to open a gzipped stream from it and re-open the face with it.</p>
<p>This function may return &lsquo;FT_Err_Unimplemented_Feature&rsquo; if your build of FreeType was not compiled with zlib support.</p>
<hr>
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<div class="section">
<h3 id="FT_Gzip_Uncompress">FT_Gzip_Uncompress</h3>
<p>Defined in FT_GZIP_H (freetype/ftgzip.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Gzip_Uncompress</b>( <a href="ft2-system_interface.html#FT_Memory">FT_Memory</a> memory,
<a href="ft2-basic_types.html#FT_Byte">FT_Byte</a>* output,
<a href="ft2-basic_types.html#FT_ULong">FT_ULong</a>* output_len,
<span class="keyword">const</span> <a href="ft2-basic_types.html#FT_Byte">FT_Byte</a>* input,
<a href="ft2-basic_types.html#FT_ULong">FT_ULong</a> input_len );
</pre>
<p>Decompress a zipped input buffer into an output buffer. This function is modeled after zlib's &lsquo;uncompress&rsquo; function.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="memory">memory</td><td class="desc">
<p>A FreeType memory handle.</p>
</td></tr>
<tr><td class="val" id="input">input</td><td class="desc">
<p>The input buffer.</p>
</td></tr>
<tr><td class="val" id="input_len">input_len</td><td class="desc">
<p>The length of the input buffer.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="output">output</td><td class="desc">
<p>The output buffer.</p>
</td></tr>
</table>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="output_len">output_len</td><td class="desc">
<p>Before calling the function, this is the total size of the output buffer, which must be large enough to hold the entire uncompressed data (so the size of the uncompressed data must be known in advance). After calling the function, &lsquo;output_len&rsquo; is the size of the used data in &lsquo;output&rsquo;.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>This function may return &lsquo;FT_Err_Unimplemented_Feature&rsquo; if your build of FreeType was not compiled with zlib support.</p>
<hr>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="header_file_macros">Header File Macros</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_CONFIG_CONFIG_H">FT_CONFIG_CONFIG_H</a></td><td><a href="#FT_LZW_H">FT_LZW_H</a></td></tr>
<tr><td><a href="#FT_CONFIG_STANDARD_LIBRARY_H">FT_CONFIG_STANDARD_LIBRARY_H</a></td><td><a href="#FT_BZIP2_H">FT_BZIP2_H</a></td></tr>
<tr><td><a href="#FT_CONFIG_OPTIONS_H">FT_CONFIG_OPTIONS_H</a></td><td><a href="#FT_WINFONTS_H">FT_WINFONTS_H</a></td></tr>
<tr><td><a href="#FT_CONFIG_MODULES_H">FT_CONFIG_MODULES_H</a></td><td><a href="#FT_GLYPH_H">FT_GLYPH_H</a></td></tr>
<tr><td><a href="#FT_FREETYPE_H">FT_FREETYPE_H</a></td><td><a href="#FT_BITMAP_H">FT_BITMAP_H</a></td></tr>
<tr><td><a href="#FT_ERRORS_H">FT_ERRORS_H</a></td><td><a href="#FT_BBOX_H">FT_BBOX_H</a></td></tr>
<tr><td><a href="#FT_MODULE_ERRORS_H">FT_MODULE_ERRORS_H</a></td><td><a href="#FT_CACHE_H">FT_CACHE_H</a></td></tr>
<tr><td><a href="#FT_SYSTEM_H">FT_SYSTEM_H</a></td><td><a href="#FT_CACHE_IMAGE_H">FT_CACHE_IMAGE_H</a></td></tr>
<tr><td><a href="#FT_IMAGE_H">FT_IMAGE_H</a></td><td><a href="#FT_CACHE_SMALL_BITMAPS_H">FT_CACHE_SMALL_BITMAPS_H</a></td></tr>
<tr><td><a href="#FT_TYPES_H">FT_TYPES_H</a></td><td><a href="#FT_CACHE_CHARMAP_H">FT_CACHE_CHARMAP_H</a></td></tr>
<tr><td><a href="#FT_LIST_H">FT_LIST_H</a></td><td><a href="#FT_MAC_H">FT_MAC_H</a></td></tr>
<tr><td><a href="#FT_OUTLINE_H">FT_OUTLINE_H</a></td><td><a href="#FT_MULTIPLE_MASTERS_H">FT_MULTIPLE_MASTERS_H</a></td></tr>
<tr><td><a href="#FT_SIZES_H">FT_SIZES_H</a></td><td><a href="#FT_SFNT_NAMES_H">FT_SFNT_NAMES_H</a></td></tr>
<tr><td><a href="#FT_MODULE_H">FT_MODULE_H</a></td><td><a href="#FT_OPENTYPE_VALIDATE_H">FT_OPENTYPE_VALIDATE_H</a></td></tr>
<tr><td><a href="#FT_RENDER_H">FT_RENDER_H</a></td><td><a href="#FT_GX_VALIDATE_H">FT_GX_VALIDATE_H</a></td></tr>
<tr><td><a href="#FT_AUTOHINTER_H">FT_AUTOHINTER_H</a></td><td><a href="#FT_PFR_H">FT_PFR_H</a></td></tr>
<tr><td><a href="#FT_CFF_DRIVER_H">FT_CFF_DRIVER_H</a></td><td><a href="#FT_STROKER_H">FT_STROKER_H</a></td></tr>
<tr><td><a href="#FT_TRUETYPE_DRIVER_H">FT_TRUETYPE_DRIVER_H</a></td><td><a href="#FT_SYNTHESIS_H">FT_SYNTHESIS_H</a></td></tr>
<tr><td><a href="#FT_PCF_DRIVER_H">FT_PCF_DRIVER_H</a></td><td><a href="#FT_FONT_FORMATS_H">FT_FONT_FORMATS_H</a></td></tr>
<tr><td><a href="#FT_TYPE1_TABLES_H">FT_TYPE1_TABLES_H</a></td><td><a href="#FT_TRIGONOMETRY_H">FT_TRIGONOMETRY_H</a></td></tr>
<tr><td><a href="#FT_TRUETYPE_IDS_H">FT_TRUETYPE_IDS_H</a></td><td><a href="#FT_LCD_FILTER_H">FT_LCD_FILTER_H</a></td></tr>
<tr><td><a href="#FT_TRUETYPE_TABLES_H">FT_TRUETYPE_TABLES_H</a></td><td><a href="#FT_UNPATENTED_HINTING_H">FT_UNPATENTED_HINTING_H</a></td></tr>
<tr><td><a href="#FT_TRUETYPE_TAGS_H">FT_TRUETYPE_TAGS_H</a></td><td><a href="#FT_INCREMENTAL_H">FT_INCREMENTAL_H</a></td></tr>
<tr><td><a href="#FT_BDF_H">FT_BDF_H</a></td><td><a href="#FT_GASP_H">FT_GASP_H</a></td></tr>
<tr><td><a href="#FT_CID_H">FT_CID_H</a></td><td><a href="#FT_ADVANCES_H">FT_ADVANCES_H</a></td></tr>
<tr><td><a href="#FT_GZIP_H">FT_GZIP_H</a></td><td><a href="#':'">':'</a></td></tr>
</table>
<p>The following macros are defined to the name of specific FreeType&nbsp;2 header files. They can be used directly in #include statements as in:</p>
<pre class="colored">
#include FT_FREETYPE_H
#include FT_MULTIPLE_MASTERS_H
#include FT_GLYPH_H
</pre>
<p>There are several reasons why we are now using macros to name public header files. The first one is that such macros are not limited to the infamous 8.3&nbsp;naming rule required by DOS (and &lsquo;FT_MULTIPLE_MASTERS_H&rsquo; is a lot more meaningful than &lsquo;ftmm.h&rsquo;).</p>
<p>The second reason is that it allows for more flexibility in the way FreeType&nbsp;2 is installed on a given system.</p>
<div class="section">
<h3 id="FT_CONFIG_CONFIG_H">FT_CONFIG_CONFIG_H</h3>
<pre>
#ifndef <b>FT_CONFIG_CONFIG_H</b>
#define <b>FT_CONFIG_CONFIG_H</b> &lt;freetype/config/ftconfig.h&gt;
#endif
</pre>
<p>A macro used in #include statements to name the file containing FreeType&nbsp;2 configuration data.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_CONFIG_STANDARD_LIBRARY_H">FT_CONFIG_STANDARD_LIBRARY_H</h3>
<pre>
#ifndef <b>FT_CONFIG_STANDARD_LIBRARY_H</b>
#define <b>FT_CONFIG_STANDARD_LIBRARY_H</b> &lt;freetype/config/ftstdlib.h&gt;
#endif
</pre>
<p>A macro used in #include statements to name the file containing FreeType&nbsp;2 interface to the standard C library functions.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_CONFIG_OPTIONS_H">FT_CONFIG_OPTIONS_H</h3>
<pre>
#ifndef <b>FT_CONFIG_OPTIONS_H</b>
#define <b>FT_CONFIG_OPTIONS_H</b> &lt;freetype/config/ftoption.h&gt;
#endif
</pre>
<p>A macro used in #include statements to name the file containing FreeType&nbsp;2 project-specific configuration options.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_CONFIG_MODULES_H">FT_CONFIG_MODULES_H</h3>
<pre>
#ifndef <b>FT_CONFIG_MODULES_H</b>
#define <b>FT_CONFIG_MODULES_H</b> &lt;freetype/config/ftmodule.h&gt;
#endif
</pre>
<p>A macro used in #include statements to name the file containing the list of FreeType&nbsp;2 modules that are statically linked to new library instances in <a href="ft2-base_interface.html#FT_Init_FreeType">FT_Init_FreeType</a>.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_FREETYPE_H">FT_FREETYPE_H</h3>
<pre>
#define <b>FT_FREETYPE_H</b> &lt;freetype/freetype.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the base FreeType&nbsp;2 API.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_ERRORS_H">FT_ERRORS_H</h3>
<pre>
#define <b>FT_ERRORS_H</b> &lt;freetype/fterrors.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the list of FreeType&nbsp;2 error codes (and messages).</p>
<p>It is included by <a href="ft2-header_file_macros.html#FT_FREETYPE_H">FT_FREETYPE_H</a>.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_MODULE_ERRORS_H">FT_MODULE_ERRORS_H</h3>
<pre>
#define <b>FT_MODULE_ERRORS_H</b> &lt;freetype/ftmoderr.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the list of FreeType&nbsp;2 module error offsets (and messages).</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_SYSTEM_H">FT_SYSTEM_H</h3>
<pre>
#define <b>FT_SYSTEM_H</b> &lt;freetype/ftsystem.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the FreeType&nbsp;2 interface to low-level operations (i.e., memory management and stream i/o).</p>
<p>It is included by <a href="ft2-header_file_macros.html#FT_FREETYPE_H">FT_FREETYPE_H</a>.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_IMAGE_H">FT_IMAGE_H</h3>
<pre>
#define <b>FT_IMAGE_H</b> &lt;freetype/ftimage.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing type definitions related to glyph images (i.e., bitmaps, outlines, scan-converter parameters).</p>
<p>It is included by <a href="ft2-header_file_macros.html#FT_FREETYPE_H">FT_FREETYPE_H</a>.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_TYPES_H">FT_TYPES_H</h3>
<pre>
#define <b>FT_TYPES_H</b> &lt;freetype/fttypes.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the basic data types defined by FreeType&nbsp;2.</p>
<p>It is included by <a href="ft2-header_file_macros.html#FT_FREETYPE_H">FT_FREETYPE_H</a>.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_LIST_H">FT_LIST_H</h3>
<pre>
#define <b>FT_LIST_H</b> &lt;freetype/ftlist.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the list management API of FreeType&nbsp;2.</p>
<p>(Most applications will never need to include this file.)</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_OUTLINE_H">FT_OUTLINE_H</h3>
<pre>
#define <b>FT_OUTLINE_H</b> &lt;freetype/ftoutln.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the scalable outline management API of FreeType&nbsp;2.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_SIZES_H">FT_SIZES_H</h3>
<pre>
#define <b>FT_SIZES_H</b> &lt;freetype/ftsizes.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the API which manages multiple <a href="ft2-base_interface.html#FT_Size">FT_Size</a> objects per face.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_MODULE_H">FT_MODULE_H</h3>
<pre>
#define <b>FT_MODULE_H</b> &lt;freetype/ftmodapi.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the module management API of FreeType&nbsp;2.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_RENDER_H">FT_RENDER_H</h3>
<pre>
#define <b>FT_RENDER_H</b> &lt;freetype/ftrender.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the renderer module management API of FreeType&nbsp;2.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_AUTOHINTER_H">FT_AUTOHINTER_H</h3>
<pre>
#define <b>FT_AUTOHINTER_H</b> &lt;freetype/ftautoh.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing structures and macros related to the auto-hinting module.</p>
<hr>
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<div class="section">
<h3 id="FT_CFF_DRIVER_H">FT_CFF_DRIVER_H</h3>
<pre>
#define <b>FT_CFF_DRIVER_H</b> &lt;freetype/ftcffdrv.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing structures and macros related to the CFF driver module.</p>
<hr>
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<div class="section">
<h3 id="FT_TRUETYPE_DRIVER_H">FT_TRUETYPE_DRIVER_H</h3>
<pre>
#define <b>FT_TRUETYPE_DRIVER_H</b> &lt;freetype/ftttdrv.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing structures and macros related to the TrueType driver module.</p>
<hr>
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<div class="section">
<h3 id="FT_PCF_DRIVER_H">FT_PCF_DRIVER_H</h3>
<pre>
#define <b>FT_PCF_DRIVER_H</b> &lt;freetype/ftpcfdrv.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing structures and macros related to the PCF driver module.</p>
<hr>
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<div class="section">
<h3 id="FT_TYPE1_TABLES_H">FT_TYPE1_TABLES_H</h3>
<pre>
#define <b>FT_TYPE1_TABLES_H</b> &lt;freetype/t1tables.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the types and API specific to the Type&nbsp;1 format.</p>
<hr>
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<div class="section">
<h3 id="FT_TRUETYPE_IDS_H">FT_TRUETYPE_IDS_H</h3>
<pre>
#define <b>FT_TRUETYPE_IDS_H</b> &lt;freetype/ttnameid.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the enumeration values which identify name strings, languages, encodings, etc. This file really contains a <i>large</i> set of constant macro definitions, taken from the TrueType and OpenType specifications.</p>
<hr>
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<div class="section">
<h3 id="FT_TRUETYPE_TABLES_H">FT_TRUETYPE_TABLES_H</h3>
<pre>
#define <b>FT_TRUETYPE_TABLES_H</b> &lt;freetype/tttables.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the types and API specific to the TrueType (as well as OpenType) format.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_TRUETYPE_TAGS_H">FT_TRUETYPE_TAGS_H</h3>
<pre>
#define <b>FT_TRUETYPE_TAGS_H</b> &lt;freetype/tttags.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the definitions of TrueType four-byte &lsquo;tags&rsquo; which identify blocks in SFNT-based font formats (i.e., TrueType and OpenType).</p>
<hr>
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<div class="section">
<h3 id="FT_BDF_H">FT_BDF_H</h3>
<pre>
#define <b>FT_BDF_H</b> &lt;freetype/ftbdf.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the definitions of an API which accesses BDF-specific strings from a face.</p>
<hr>
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<div class="section">
<h3 id="FT_CID_H">FT_CID_H</h3>
<pre>
#define <b>FT_CID_H</b> &lt;freetype/ftcid.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the definitions of an API which access CID font information from a face.</p>
<hr>
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<div class="section">
<h3 id="FT_GZIP_H">FT_GZIP_H</h3>
<pre>
#define <b>FT_GZIP_H</b> &lt;freetype/ftgzip.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the definitions of an API which supports gzip-compressed files.</p>
<hr>
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<div class="section">
<h3 id="FT_LZW_H">FT_LZW_H</h3>
<pre>
#define <b>FT_LZW_H</b> &lt;freetype/ftlzw.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the definitions of an API which supports LZW-compressed files.</p>
<hr>
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<div class="section">
<h3 id="FT_BZIP2_H">FT_BZIP2_H</h3>
<pre>
#define <b>FT_BZIP2_H</b> &lt;freetype/ftbzip2.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the definitions of an API which supports bzip2-compressed files.</p>
<hr>
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<div class="section">
<h3 id="FT_WINFONTS_H">FT_WINFONTS_H</h3>
<pre>
#define <b>FT_WINFONTS_H</b> &lt;freetype/ftwinfnt.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the definitions of an API which supports Windows FNT files.</p>
<hr>
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<div class="section">
<h3 id="FT_GLYPH_H">FT_GLYPH_H</h3>
<pre>
#define <b>FT_GLYPH_H</b> &lt;freetype/ftglyph.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the API of the optional glyph management component.</p>
<hr>
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<div class="section">
<h3 id="FT_BITMAP_H">FT_BITMAP_H</h3>
<pre>
#define <b>FT_BITMAP_H</b> &lt;freetype/ftbitmap.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the API of the optional bitmap conversion component.</p>
<hr>
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<div class="section">
<h3 id="FT_BBOX_H">FT_BBOX_H</h3>
<pre>
#define <b>FT_BBOX_H</b> &lt;freetype/ftbbox.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the API of the optional exact bounding box computation routines.</p>
<hr>
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<div class="section">
<h3 id="FT_CACHE_H">FT_CACHE_H</h3>
<pre>
#define <b>FT_CACHE_H</b> &lt;freetype/ftcache.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the API of the optional FreeType&nbsp;2 cache sub-system.</p>
<hr>
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<div class="section">
<h3 id="FT_CACHE_IMAGE_H">FT_CACHE_IMAGE_H</h3>
<pre>
#define <b>FT_CACHE_IMAGE_H</b> <a href="ft2-header_file_macros.html#FT_CACHE_H">FT_CACHE_H</a>
</pre>
<p>A macro used in #include statements to name the file containing the &lsquo;glyph image&rsquo; API of the FreeType&nbsp;2 cache sub-system.</p>
<p>It is used to define a cache for <a href="ft2-glyph_management.html#FT_Glyph">FT_Glyph</a> elements. You can also use the API defined in <a href="ft2-header_file_macros.html#FT_CACHE_SMALL_BITMAPS_H">FT_CACHE_SMALL_BITMAPS_H</a> if you only need to store small glyph bitmaps, as it will use less memory.</p>
<p>This macro is deprecated. Simply include <a href="ft2-header_file_macros.html#FT_CACHE_H">FT_CACHE_H</a> to have all glyph image-related cache declarations.</p>
<hr>
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<div class="section">
<h3 id="FT_CACHE_SMALL_BITMAPS_H">FT_CACHE_SMALL_BITMAPS_H</h3>
<pre>
#define <b>FT_CACHE_SMALL_BITMAPS_H</b> <a href="ft2-header_file_macros.html#FT_CACHE_H">FT_CACHE_H</a>
</pre>
<p>A macro used in #include statements to name the file containing the &lsquo;small bitmaps&rsquo; API of the FreeType&nbsp;2 cache sub-system.</p>
<p>It is used to define a cache for small glyph bitmaps in a relatively memory-efficient way. You can also use the API defined in <a href="ft2-header_file_macros.html#FT_CACHE_IMAGE_H">FT_CACHE_IMAGE_H</a> if you want to cache arbitrary glyph images, including scalable outlines.</p>
<p>This macro is deprecated. Simply include <a href="ft2-header_file_macros.html#FT_CACHE_H">FT_CACHE_H</a> to have all small bitmaps-related cache declarations.</p>
<hr>
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<div class="section">
<h3 id="FT_CACHE_CHARMAP_H">FT_CACHE_CHARMAP_H</h3>
<pre>
#define <b>FT_CACHE_CHARMAP_H</b> <a href="ft2-header_file_macros.html#FT_CACHE_H">FT_CACHE_H</a>
</pre>
<p>A macro used in #include statements to name the file containing the &lsquo;charmap&rsquo; API of the FreeType&nbsp;2 cache sub-system.</p>
<p>This macro is deprecated. Simply include <a href="ft2-header_file_macros.html#FT_CACHE_H">FT_CACHE_H</a> to have all charmap-based cache declarations.</p>
<hr>
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<div class="section">
<h3 id="FT_MAC_H">FT_MAC_H</h3>
<pre>
#define <b>FT_MAC_H</b> &lt;freetype/ftmac.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the Macintosh-specific FreeType&nbsp;2 API. The latter is used to access fonts embedded in resource forks.</p>
<p>This header file must be explicitly included by client applications compiled on the Mac (note that the base API still works though).</p>
<hr>
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<div class="section">
<h3 id="FT_MULTIPLE_MASTERS_H">FT_MULTIPLE_MASTERS_H</h3>
<pre>
#define <b>FT_MULTIPLE_MASTERS_H</b> &lt;freetype/ftmm.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the optional multiple-masters management API of FreeType&nbsp;2.</p>
<hr>
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<div class="section">
<h3 id="FT_SFNT_NAMES_H">FT_SFNT_NAMES_H</h3>
<pre>
#define <b>FT_SFNT_NAMES_H</b> &lt;freetype/ftsnames.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the optional FreeType&nbsp;2 API which accesses embedded &lsquo;name&rsquo; strings in SFNT-based font formats (i.e., TrueType and OpenType).</p>
<hr>
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<div class="section">
<h3 id="FT_OPENTYPE_VALIDATE_H">FT_OPENTYPE_VALIDATE_H</h3>
<pre>
#define <b>FT_OPENTYPE_VALIDATE_H</b> &lt;freetype/ftotval.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the optional FreeType&nbsp;2 API which validates OpenType tables (BASE, GDEF, GPOS, GSUB, JSTF).</p>
<hr>
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<div class="section">
<h3 id="FT_GX_VALIDATE_H">FT_GX_VALIDATE_H</h3>
<pre>
#define <b>FT_GX_VALIDATE_H</b> &lt;freetype/ftgxval.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the optional FreeType&nbsp;2 API which validates TrueTypeGX/AAT tables (feat, mort, morx, bsln, just, kern, opbd, trak, prop).</p>
<hr>
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<div class="section">
<h3 id="FT_PFR_H">FT_PFR_H</h3>
<pre>
#define <b>FT_PFR_H</b> &lt;freetype/ftpfr.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the FreeType&nbsp;2 API which accesses PFR-specific data.</p>
<hr>
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<div class="section">
<h3 id="FT_STROKER_H">FT_STROKER_H</h3>
<pre>
#define <b>FT_STROKER_H</b> &lt;freetype/ftstroke.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the FreeType&nbsp;2 API which provides functions to stroke outline paths.</p>
<hr>
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<div class="section">
<h3 id="FT_SYNTHESIS_H">FT_SYNTHESIS_H</h3>
<pre>
#define <b>FT_SYNTHESIS_H</b> &lt;freetype/ftsynth.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the FreeType&nbsp;2 API which performs artificial obliquing and emboldening.</p>
<hr>
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<div class="section">
<h3 id="FT_FONT_FORMATS_H">FT_FONT_FORMATS_H</h3>
<pre>
#define <b>FT_FONT_FORMATS_H</b> &lt;freetype/ftfntfmt.h&gt;
/* deprecated */
#define FT_XFREE86_H <b>FT_FONT_FORMATS_H</b>
</pre>
<p>A macro used in #include statements to name the file containing the FreeType&nbsp;2 API which provides functions specific to font formats.</p>
<hr>
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<div class="section">
<h3 id="FT_TRIGONOMETRY_H">FT_TRIGONOMETRY_H</h3>
<pre>
#define <b>FT_TRIGONOMETRY_H</b> &lt;freetype/fttrigon.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the FreeType&nbsp;2 API which performs trigonometric computations (e.g., cosines and arc tangents).</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_LCD_FILTER_H">FT_LCD_FILTER_H</h3>
<pre>
#define <b>FT_LCD_FILTER_H</b> &lt;freetype/ftlcdfil.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the FreeType&nbsp;2 API which performs color filtering for subpixel rendering.</p>
<hr>
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<div class="section">
<h3 id="FT_UNPATENTED_HINTING_H">FT_UNPATENTED_HINTING_H</h3>
<pre>
#define <b>FT_UNPATENTED_HINTING_H</b> &lt;freetype/ttunpat.h&gt;
</pre>
<p>Deprecated.</p>
<hr>
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<div class="section">
<h3 id="FT_INCREMENTAL_H">FT_INCREMENTAL_H</h3>
<pre>
#define <b>FT_INCREMENTAL_H</b> &lt;freetype/ftincrem.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the FreeType&nbsp;2 API which performs incremental glyph loading.</p>
<hr>
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<div class="section">
<h3 id="FT_GASP_H">FT_GASP_H</h3>
<pre>
#define <b>FT_GASP_H</b> &lt;freetype/ftgasp.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the FreeType&nbsp;2 API which returns entries from the TrueType GASP table.</p>
<hr>
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<div class="section">
<h3 id="FT_ADVANCES_H">FT_ADVANCES_H</h3>
<pre>
#define <b>FT_ADVANCES_H</b> &lt;freetype/ftadvanc.h&gt;
</pre>
<p>A macro used in #include statements to name the file containing the FreeType&nbsp;2 API which returns individual and ranged glyph advances.</p>
<hr>
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<div class="section">
<h3 id="':'">':'</h3>
<p>Defined in FT_CONFIG_OPTIONS_H (freetype/config/ftoption.h).</p>
<pre>
#define FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES
</pre>
<h4>property-name1</h4>
<p>'=' &lt;property-value1&gt;</p>
<h4>module-name2</h4>
<p>':'</p>
<h4>property-name2</h4>
<p>'=' &lt;property-value2&gt; ...</p>
<p>Example:</p>
<p>FREETYPE_PROPERTIES=truetype:interpreter-version=35 \ cff:no-stem-darkening=1 \ autofitter:warping=1</p>
<hr>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="header_inclusion">FreeType's header inclusion scheme</h1>
<p>To be as flexible as possible (and for historical reasons), FreeType uses a very special inclusion scheme to load header files, for example</p>
<pre class="colored">
#include &lt;ft2build.h&gt;
#include FT_FREETYPE_H
#include FT_OUTLINE_H
</pre>
<p>A compiler and its preprocessor only needs an include path to find the file &lsquo;ft2build.h&rsquo;; the exact locations and names of the other FreeType header files are hidden by preprocessor macro names, loaded by &lsquo;ft2build.h&rsquo;. The API documentation always gives the header macro name needed for a particular function.</p>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="incremental">Incremental Loading</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_Incremental">FT_Incremental</a></td><td><a href="#FT_Incremental_GetGlyphMetricsFunc">FT_Incremental_GetGlyphMetricsFunc</a></td></tr>
<tr><td><a href="#FT_Incremental_MetricsRec">FT_Incremental_MetricsRec</a></td><td><a href="#FT_Incremental_FuncsRec">FT_Incremental_FuncsRec</a></td></tr>
<tr><td><a href="#FT_Incremental_Metrics">FT_Incremental_Metrics</a></td><td><a href="#FT_Incremental_InterfaceRec">FT_Incremental_InterfaceRec</a></td></tr>
<tr><td><a href="#FT_Incremental_GetGlyphDataFunc">FT_Incremental_GetGlyphDataFunc</a></td><td><a href="#FT_Incremental_Interface">FT_Incremental_Interface</a></td></tr>
<tr><td><a href="#FT_Incremental_FreeGlyphDataFunc">FT_Incremental_FreeGlyphDataFunc</a></td><td><a href="#FT_PARAM_TAG_INCREMENTAL">FT_PARAM_TAG_INCREMENTAL</a></td></tr>
</table>
<p>This section contains various functions used to perform so-called &lsquo;incremental&rsquo; glyph loading. This is a mode where all glyphs loaded from a given <a href="ft2-base_interface.html#FT_Face">FT_Face</a> are provided by the client application.</p>
<p>Apart from that, all other tables are loaded normally from the font file. This mode is useful when FreeType is used within another engine, e.g., a PostScript Imaging Processor.</p>
<p>To enable this mode, you must use <a href="ft2-base_interface.html#FT_Open_Face">FT_Open_Face</a>, passing an <a href="ft2-base_interface.html#FT_Parameter">FT_Parameter</a> with the <a href="ft2-incremental.html#FT_PARAM_TAG_INCREMENTAL">FT_PARAM_TAG_INCREMENTAL</a> tag and an <a href="ft2-incremental.html#FT_Incremental_Interface">FT_Incremental_Interface</a> value. See the comments for <a href="ft2-incremental.html#FT_Incremental_InterfaceRec">FT_Incremental_InterfaceRec</a> for an example.</p>
<div class="section">
<h3 id="FT_Incremental">FT_Incremental</h3>
<p>Defined in FT_INCREMENTAL_H (freetype/ftincrem.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_IncrementalRec_* <b>FT_Incremental</b>;
</pre>
<p>An opaque type describing a user-provided object used to implement &lsquo;incremental&rsquo; glyph loading within FreeType. This is used to support embedded fonts in certain environments (e.g., PostScript interpreters), where the glyph data isn't in the font file, or must be overridden by different values.</p>
<h4>note</h4>
<p>It is up to client applications to create and implement <a href="ft2-incremental.html#FT_Incremental">FT_Incremental</a> objects, as long as they provide implementations for the methods <a href="ft2-incremental.html#FT_Incremental_GetGlyphDataFunc">FT_Incremental_GetGlyphDataFunc</a>, <a href="ft2-incremental.html#FT_Incremental_FreeGlyphDataFunc">FT_Incremental_FreeGlyphDataFunc</a> and <a href="ft2-incremental.html#FT_Incremental_GetGlyphMetricsFunc">FT_Incremental_GetGlyphMetricsFunc</a>.</p>
<p>See the description of <a href="ft2-incremental.html#FT_Incremental_InterfaceRec">FT_Incremental_InterfaceRec</a> to understand how to use incremental objects with FreeType.</p>
<hr>
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<div class="section">
<h3 id="FT_Incremental_MetricsRec">FT_Incremental_MetricsRec</h3>
<p>Defined in FT_INCREMENTAL_H (freetype/ftincrem.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Incremental_MetricsRec_
{
<a href="ft2-basic_types.html#FT_Long">FT_Long</a> bearing_x;
<a href="ft2-basic_types.html#FT_Long">FT_Long</a> bearing_y;
<a href="ft2-basic_types.html#FT_Long">FT_Long</a> advance;
<a href="ft2-basic_types.html#FT_Long">FT_Long</a> advance_v; /* since 2.3.12 */
} <b>FT_Incremental_MetricsRec</b>;
</pre>
<p>A small structure used to contain the basic glyph metrics returned by the <a href="ft2-incremental.html#FT_Incremental_GetGlyphMetricsFunc">FT_Incremental_GetGlyphMetricsFunc</a> method.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="bearing_x">bearing_x</td><td class="desc">
<p>Left bearing, in font units.</p>
</td></tr>
<tr><td class="val" id="bearing_y">bearing_y</td><td class="desc">
<p>Top bearing, in font units.</p>
</td></tr>
<tr><td class="val" id="advance">advance</td><td class="desc">
<p>Horizontal component of glyph advance, in font units.</p>
</td></tr>
<tr><td class="val" id="advance_v">advance_v</td><td class="desc">
<p>Vertical component of glyph advance, in font units.</p>
</td></tr>
</table>
<h4>note</h4>
<p>These correspond to horizontal or vertical metrics depending on the value of the &lsquo;vertical&rsquo; argument to the function <a href="ft2-incremental.html#FT_Incremental_GetGlyphMetricsFunc">FT_Incremental_GetGlyphMetricsFunc</a>.</p>
<hr>
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<div class="section">
<h3 id="FT_Incremental_Metrics">FT_Incremental_Metrics</h3>
<p>Defined in FT_INCREMENTAL_H (freetype/ftincrem.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Incremental_MetricsRec_* <b>FT_Incremental_Metrics</b>;
</pre>
<p>A handle to an <a href="ft2-incremental.html#FT_Incremental_MetricsRec">FT_Incremental_MetricsRec</a> structure.</p>
<hr>
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<div class="section">
<h3 id="FT_Incremental_GetGlyphDataFunc">FT_Incremental_GetGlyphDataFunc</h3>
<p>Defined in FT_INCREMENTAL_H (freetype/ftincrem.h).</p>
<pre>
<span class="keyword">typedef</span> <a href="ft2-basic_types.html#FT_Error">FT_Error</a>
(*<b>FT_Incremental_GetGlyphDataFunc</b>)( <a href="ft2-incremental.html#FT_Incremental">FT_Incremental</a> incremental,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> glyph_index,
<a href="ft2-basic_types.html#FT_Data">FT_Data</a>* adata );
</pre>
<p>A function called by FreeType to access a given glyph's data bytes during <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a> or <a href="ft2-base_interface.html#FT_Load_Char">FT_Load_Char</a> if incremental loading is enabled.</p>
<p>Note that the format of the glyph's data bytes depends on the font file format. For TrueType, it must correspond to the raw bytes within the &lsquo;glyf&rsquo; table. For PostScript formats, it must correspond to the <b>unencrypted</b> charstring bytes, without any &lsquo;lenIV&rsquo; header. It is undefined for any other format.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="incremental">incremental</td><td class="desc">
<p>Handle to an opaque <a href="ft2-incremental.html#FT_Incremental">FT_Incremental</a> handle provided by the client application.</p>
</td></tr>
<tr><td class="val" id="glyph_index">glyph_index</td><td class="desc">
<p>Index of relevant glyph.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="adata">adata</td><td class="desc">
<p>A structure describing the returned glyph data bytes (which will be accessed as a read-only byte block).</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>If this function returns successfully the method <a href="ft2-incremental.html#FT_Incremental_FreeGlyphDataFunc">FT_Incremental_FreeGlyphDataFunc</a> will be called later to release the data bytes.</p>
<p>Nested calls to <a href="ft2-incremental.html#FT_Incremental_GetGlyphDataFunc">FT_Incremental_GetGlyphDataFunc</a> can happen for compound glyphs.</p>
<hr>
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<div class="section">
<h3 id="FT_Incremental_FreeGlyphDataFunc">FT_Incremental_FreeGlyphDataFunc</h3>
<p>Defined in FT_INCREMENTAL_H (freetype/ftincrem.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">void</span>
(*<b>FT_Incremental_FreeGlyphDataFunc</b>)( <a href="ft2-incremental.html#FT_Incremental">FT_Incremental</a> incremental,
<a href="ft2-basic_types.html#FT_Data">FT_Data</a>* data );
</pre>
<p>A function used to release the glyph data bytes returned by a successful call to <a href="ft2-incremental.html#FT_Incremental_GetGlyphDataFunc">FT_Incremental_GetGlyphDataFunc</a>.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="incremental">incremental</td><td class="desc">
<p>A handle to an opaque <a href="ft2-incremental.html#FT_Incremental">FT_Incremental</a> handle provided by the client application.</p>
</td></tr>
<tr><td class="val" id="data">data</td><td class="desc">
<p>A structure describing the glyph data bytes (which will be accessed as a read-only byte block).</p>
</td></tr>
</table>
<hr>
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<div class="section">
<h3 id="FT_Incremental_GetGlyphMetricsFunc">FT_Incremental_GetGlyphMetricsFunc</h3>
<p>Defined in FT_INCREMENTAL_H (freetype/ftincrem.h).</p>
<pre>
<span class="keyword">typedef</span> <a href="ft2-basic_types.html#FT_Error">FT_Error</a>
(*<b>FT_Incremental_GetGlyphMetricsFunc</b>)
( <a href="ft2-incremental.html#FT_Incremental">FT_Incremental</a> incremental,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> glyph_index,
<a href="ft2-basic_types.html#FT_Bool">FT_Bool</a> vertical,
<a href="ft2-incremental.html#FT_Incremental_MetricsRec">FT_Incremental_MetricsRec</a> *ametrics );
</pre>
<p>A function used to retrieve the basic metrics of a given glyph index before accessing its data. This is necessary because, in certain formats like TrueType, the metrics are stored in a different place from the glyph images proper.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="incremental">incremental</td><td class="desc">
<p>A handle to an opaque <a href="ft2-incremental.html#FT_Incremental">FT_Incremental</a> handle provided by the client application.</p>
</td></tr>
<tr><td class="val" id="glyph_index">glyph_index</td><td class="desc">
<p>Index of relevant glyph.</p>
</td></tr>
<tr><td class="val" id="vertical">vertical</td><td class="desc">
<p>If true, return vertical metrics.</p>
</td></tr>
<tr><td class="val" id="ametrics">ametrics</td><td class="desc">
<p>This parameter is used for both input and output. The original glyph metrics, if any, in font units. If metrics are not available all the values must be set to zero.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="ametrics">ametrics</td><td class="desc">
<p>The replacement glyph metrics in font units.</p>
</td></tr>
</table>
<hr>
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<div class="section">
<h3 id="FT_Incremental_FuncsRec">FT_Incremental_FuncsRec</h3>
<p>Defined in FT_INCREMENTAL_H (freetype/ftincrem.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Incremental_FuncsRec_
{
<a href="ft2-incremental.html#FT_Incremental_GetGlyphDataFunc">FT_Incremental_GetGlyphDataFunc</a> get_glyph_data;
<a href="ft2-incremental.html#FT_Incremental_FreeGlyphDataFunc">FT_Incremental_FreeGlyphDataFunc</a> free_glyph_data;
<a href="ft2-incremental.html#FT_Incremental_GetGlyphMetricsFunc">FT_Incremental_GetGlyphMetricsFunc</a> get_glyph_metrics;
} <b>FT_Incremental_FuncsRec</b>;
</pre>
<p>A table of functions for accessing fonts that load data incrementally. Used in <a href="ft2-incremental.html#FT_Incremental_InterfaceRec">FT_Incremental_InterfaceRec</a>.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="get_glyph_data">get_glyph_data</td><td class="desc">
<p>The function to get glyph data. Must not be null.</p>
</td></tr>
<tr><td class="val" id="free_glyph_data">free_glyph_data</td><td class="desc">
<p>The function to release glyph data. Must not be null.</p>
</td></tr>
<tr><td class="val" id="get_glyph_metrics">get_glyph_metrics</td><td class="desc">
<p>The function to get glyph metrics. May be null if the font does not provide overriding glyph metrics.</p>
</td></tr>
</table>
<hr>
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<div class="section">
<h3 id="FT_Incremental_InterfaceRec">FT_Incremental_InterfaceRec</h3>
<p>Defined in FT_INCREMENTAL_H (freetype/ftincrem.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Incremental_InterfaceRec_
{
<span class="keyword">const</span> <a href="ft2-incremental.html#FT_Incremental_FuncsRec">FT_Incremental_FuncsRec</a>* funcs;
<a href="ft2-incremental.html#FT_Incremental">FT_Incremental</a> object;
} <b>FT_Incremental_InterfaceRec</b>;
</pre>
<p>A structure to be used with <a href="ft2-base_interface.html#FT_Open_Face">FT_Open_Face</a> to indicate that the user wants to support incremental glyph loading. You should use it with <a href="ft2-incremental.html#FT_PARAM_TAG_INCREMENTAL">FT_PARAM_TAG_INCREMENTAL</a> as in the following example:</p>
<pre class="colored">
FT_Incremental_InterfaceRec inc_int;
FT_Parameter parameter;
FT_Open_Args open_args;
// set up incremental descriptor
inc_int.funcs = my_funcs;
inc_int.object = my_object;
// set up optional parameter
parameter.tag = FT_PARAM_TAG_INCREMENTAL;
parameter.data = &amp;inc_int;
// set up FT_Open_Args structure
open_args.flags = FT_OPEN_PATHNAME | FT_OPEN_PARAMS;
open_args.pathname = my_font_pathname;
open_args.num_params = 1;
open_args.params = &amp;parameter; // we use one optional argument
// open the font
error = FT_Open_Face( library, &amp;open_args, index, &amp;face );
...
</pre>
<hr>
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<div class="section">
<h3 id="FT_Incremental_Interface">FT_Incremental_Interface</h3>
<p>Defined in FT_INCREMENTAL_H (freetype/ftincrem.h).</p>
<pre>
<span class="keyword">typedef</span> <a href="ft2-incremental.html#FT_Incremental_InterfaceRec">FT_Incremental_InterfaceRec</a>* <b>FT_Incremental_Interface</b>;
</pre>
<p>A pointer to an <a href="ft2-incremental.html#FT_Incremental_InterfaceRec">FT_Incremental_InterfaceRec</a> structure.</p>
<hr>
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<h3 id="FT_PARAM_TAG_INCREMENTAL">FT_PARAM_TAG_INCREMENTAL</h3>
<p>Defined in FT_INCREMENTAL_H (freetype/ftincrem.h).</p>
<pre>
#define <b>FT_PARAM_TAG_INCREMENTAL</b> <a href="ft2-basic_types.html#FT_MAKE_TAG">FT_MAKE_TAG</a>( 'i', 'n', 'c', 'r' )
</pre>
<p>A constant used as the tag of <a href="ft2-base_interface.html#FT_Parameter">FT_Parameter</a> structures to indicate an incremental loading object to be used by FreeType.</p>
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<h1>FreeType-2.8.1 API Reference</h1>
<table class="index">
<tr><td><a href="ft2-header_file_macros.html#':'">':'</a></td><td><a href="ft2-base_interface.html#FT_Kerning_Mode">FT_KERNING_UNFITTED</a></td><td><a href="ft2-glyph_stroker.html#FT_Stroker_Export">FT_Stroker_Export</a></td></tr>
<tr><td><a href="ft2-bdf_fonts.html#BDF_PropertyType">BDF_PROPERTY_TYPE_ATOM</a></td><td><a href="ft2-base_interface.html#FT_Kerning_Mode">FT_KERNING_UNSCALED</a></td><td><a href="ft2-glyph_stroker.html#FT_Stroker_ExportBorder">FT_Stroker_ExportBorder</a></td></tr>
<tr><td><a href="ft2-bdf_fonts.html#BDF_PropertyType">BDF_PROPERTY_TYPE_CARDINAL</a></td><td><a href="ft2-base_interface.html#FT_Kerning_Mode">FT_Kerning_Mode</a></td><td><a href="ft2-glyph_stroker.html#FT_Stroker_GetBorderCounts">FT_Stroker_GetBorderCounts</a></td></tr>
<tr><td><a href="ft2-bdf_fonts.html#BDF_PropertyType">BDF_PROPERTY_TYPE_INTEGER</a></td><td><a href="ft2-lcd_filtering.html#FT_LcdFilter">FT_LCD_FILTER_DEFAULT</a></td><td><a href="ft2-glyph_stroker.html#FT_Stroker_GetCounts">FT_Stroker_GetCounts</a></td></tr>
<tr><td><a href="ft2-bdf_fonts.html#BDF_PropertyType">BDF_PROPERTY_TYPE_NONE</a></td><td><a href="ft2-header_file_macros.html#FT_LCD_FILTER_H">FT_LCD_FILTER_H</a></td><td><a href="ft2-glyph_stroker.html#FT_Stroker_LineCap">FT_Stroker_LineCap</a></td></tr>
<tr><td><a href="ft2-bdf_fonts.html#BDF_Property">BDF_Property</a></td><td><a href="ft2-lcd_filtering.html#FT_LcdFilter">FT_LCD_FILTER_LEGACY</a></td><td><a href="ft2-glyph_stroker.html#FT_Stroker_LineJoin">FT_Stroker_LineJoin</a></td></tr>
<tr><td><a href="ft2-bdf_fonts.html#BDF_PropertyRec">BDF_PropertyRec</a></td><td><a href="ft2-lcd_filtering.html#FT_LcdFilter">FT_LCD_FILTER_LEGACY1</a></td><td><a href="ft2-glyph_stroker.html#FT_Stroker_LineTo">FT_Stroker_LineTo</a></td></tr>
<tr><td><a href="ft2-bdf_fonts.html#BDF_PropertyType">BDF_PropertyType</a></td><td><a href="ft2-lcd_filtering.html#FT_LcdFilter">FT_LCD_FILTER_LIGHT</a></td><td><a href="ft2-glyph_stroker.html#FT_Stroker_New">FT_Stroker_New</a></td></tr>
<tr><td><a href="ft2-type1_tables.html#CID_FaceDict">CID_FaceDict</a></td><td><a href="ft2-lcd_filtering.html#FT_LcdFilter">FT_LCD_FILTER_NONE</a></td><td><a href="ft2-glyph_stroker.html#FT_Stroker_ParseOutline">FT_Stroker_ParseOutline</a></td></tr>
<tr><td><a href="ft2-type1_tables.html#CID_FaceDictRec">CID_FaceDictRec</a></td><td><a href="ft2-lcd_filtering.html#FT_LcdFilter">FT_LcdFilter</a></td><td><a href="ft2-glyph_stroker.html#FT_Stroker_Rewind">FT_Stroker_Rewind</a></td></tr>
<tr><td><a href="ft2-type1_tables.html#CID_FaceInfo">CID_FaceInfo</a></td><td><a href="ft2-header_file_macros.html#FT_LIST_H">FT_LIST_H</a></td><td><a href="ft2-glyph_stroker.html#FT_Stroker_Set">FT_Stroker_Set</a></td></tr>
<tr><td><a href="ft2-type1_tables.html#CID_FaceInfoRec">CID_FaceInfoRec</a></td><td><a href="ft2-base_interface.html#FT_Library">FT_Library</a></td><td><a href="ft2-glyph_stroker.html#FT_StrokerBorder">FT_StrokerBorder</a></td></tr>
<tr><td><a href="ft2-type1_tables.html#CID_FontDict">CID_FontDict</a></td><td><a href="ft2-lcd_filtering.html#FT_Library_SetLcdFilter">FT_Library_SetLcdFilter</a></td><td><a href="ft2-base_interface.html#FT_SUBGLYPH_FLAG_XXX">FT_SUBGLYPH_FLAG_2X2</a></td></tr>
<tr><td><a href="ft2-type1_tables.html#CID_Info">CID_Info</a></td><td><a href="ft2-lcd_filtering.html#FT_Library_SetLcdFilterWeights">FT_Library_SetLcdFilterWeights</a></td><td><a href="ft2-base_interface.html#FT_SUBGLYPH_FLAG_XXX">FT_SUBGLYPH_FLAG_ARGS_ARE_WORDS</a></td></tr>
<tr><td><a href="ft2-auto_hinter.html#darkening-parameters(autofit)">darkening-parameters (autofit)</a></td><td><a href="ft2-version.html#FT_Library_Version">FT_Library_Version</a></td><td><a href="ft2-base_interface.html#FT_SUBGLYPH_FLAG_XXX">FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES</a></td></tr>
<tr><td><a href="ft2-cff_driver.html#darkening-parameters(cff)">darkening-parameters (cff)</a></td><td><a href="ft2-list_processing.html#FT_List">FT_List</a></td><td><a href="ft2-base_interface.html#FT_SUBGLYPH_FLAG_XXX">FT_SUBGLYPH_FLAG_ROUND_XY_TO_GRID</a></td></tr>
<tr><td><a href="ft2-auto_hinter.html#default-script">default-script</a></td><td><a href="ft2-list_processing.html#FT_List_Add">FT_List_Add</a></td><td><a href="ft2-base_interface.html#FT_SUBGLYPH_FLAG_XXX">FT_SUBGLYPH_FLAG_SCALE</a></td></tr>
<tr><td><a href="ft2-version.html#FREETYPE_XXX">FREETYPE_MAJOR</a></td><td><a href="ft2-list_processing.html#FT_List_Destructor">FT_List_Destructor</a></td><td><a href="ft2-base_interface.html#FT_SUBGLYPH_FLAG_XXX">FT_SUBGLYPH_FLAG_USE_MY_METRICS</a></td></tr>
<tr><td><a href="ft2-version.html#FREETYPE_XXX">FREETYPE_MINOR</a></td><td><a href="ft2-list_processing.html#FT_List_Finalize">FT_List_Finalize</a></td><td><a href="ft2-base_interface.html#FT_SUBGLYPH_FLAG_XXX">FT_SUBGLYPH_FLAG_XXX</a></td></tr>
<tr><td><a href="ft2-version.html#FREETYPE_XXX">FREETYPE_PATCH</a></td><td><a href="ft2-list_processing.html#FT_List_Find">FT_List_Find</a></td><td><a href="ft2-base_interface.html#FT_SUBGLYPH_FLAG_XXX">FT_SUBGLYPH_FLAG_XY_SCALE</a></td></tr>
<tr><td><a href="ft2-version.html#FREETYPE_XXX">FREETYPE_XXX</a></td><td><a href="ft2-list_processing.html#FT_List_Insert">FT_List_Insert</a></td><td><a href="ft2-base_interface.html#FT_SubGlyph">FT_SubGlyph</a></td></tr>
<tr><td><a href="ft2-sizes_management.html#FT_Activate_Size">FT_Activate_Size</a></td><td><a href="ft2-list_processing.html#FT_List_Iterate">FT_List_Iterate</a></td><td><a href="ft2-header_file_macros.html#FT_SYNTHESIS_H">FT_SYNTHESIS_H</a></td></tr>
<tr><td><a href="ft2-quick_advance.html#FT_ADVANCE_FLAG_FAST_ONLY">FT_ADVANCE_FLAG_FAST_ONLY</a></td><td><a href="ft2-list_processing.html#FT_List_Iterator">FT_List_Iterator</a></td><td><a href="ft2-header_file_macros.html#FT_SYSTEM_H">FT_SYSTEM_H</a></td></tr>
<tr><td><a href="ft2-header_file_macros.html#FT_ADVANCES_H">FT_ADVANCES_H</a></td><td><a href="ft2-list_processing.html#FT_List_Remove">FT_List_Remove</a></td><td><a href="ft2-basic_types.html#FT_Tag">FT_Tag</a></td></tr>
<tr><td><a href="ft2-module_management.html#FT_Add_Default_Modules">FT_Add_Default_Modules</a></td><td><a href="ft2-list_processing.html#FT_List_Up">FT_List_Up</a></td><td><a href="ft2-computations.html#FT_Tan">FT_Tan</a></td></tr>
<tr><td><a href="ft2-module_management.html#FT_Add_Module">FT_Add_Module</a></td><td><a href="ft2-list_processing.html#FT_ListNode">FT_ListNode</a></td><td><a href="ft2-header_file_macros.html#FT_TRIGONOMETRY_H">FT_TRIGONOMETRY_H</a></td></tr>
<tr><td><a href="ft2-system_interface.html#FT_Alloc_Func">FT_Alloc_Func</a></td><td><a href="ft2-list_processing.html#FT_ListNodeRec">FT_ListNodeRec</a></td><td><a href="ft2-header_file_macros.html#FT_TRUETYPE_DRIVER_H">FT_TRUETYPE_DRIVER_H</a></td></tr>
<tr><td><a href="ft2-computations.html#FT_ANGLE_2PI">FT_ANGLE_2PI</a></td><td><a href="ft2-list_processing.html#FT_ListRec">FT_ListRec</a></td><td><a href="ft2-truetype_engine.html#FT_TrueTypeEngineType">FT_TRUETYPE_ENGINE_TYPE_NONE</a></td></tr>
<tr><td><a href="ft2-computations.html#FT_ANGLE_PI">FT_ANGLE_PI</a></td><td><a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_BITMAP_METRICS_ONLY</a></td><td><a href="ft2-truetype_engine.html#FT_TrueTypeEngineType">FT_TRUETYPE_ENGINE_TYPE_PATENTED</a></td></tr>
<tr><td><a href="ft2-computations.html#FT_ANGLE_PI2">FT_ANGLE_PI2</a></td><td><a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_COLOR</a></td><td><a href="ft2-truetype_engine.html#FT_TrueTypeEngineType">FT_TRUETYPE_ENGINE_TYPE_UNPATENTED</a></td></tr>
<tr><td><a href="ft2-computations.html#FT_ANGLE_PI4">FT_ANGLE_PI4</a></td><td><a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_COMPUTE_METRICS</a></td><td><a href="ft2-header_file_macros.html#FT_TRUETYPE_IDS_H">FT_TRUETYPE_IDS_H</a></td></tr>
<tr><td><a href="ft2-computations.html#FT_Angle">FT_Angle</a></td><td><a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_CROP_BITMAP</a></td><td><a href="ft2-header_file_macros.html#FT_TRUETYPE_TABLES_H">FT_TRUETYPE_TABLES_H</a></td></tr>
<tr><td><a href="ft2-computations.html#FT_Angle_Diff">FT_Angle_Diff</a></td><td><a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_DEFAULT</a></td><td><a href="ft2-header_file_macros.html#FT_TRUETYPE_TAGS_H">FT_TRUETYPE_TAGS_H</a></td></tr>
<tr><td><a href="ft2-computations.html#FT_Atan2">FT_Atan2</a></td><td><a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_FORCE_AUTOHINT</a></td><td><a href="ft2-truetype_engine.html#FT_TrueTypeEngineType">FT_TrueTypeEngineType</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Attach_File">FT_Attach_File</a></td><td><a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH</a></td><td><a href="ft2-gx_validation.html#FT_TrueTypeGX_Free">FT_TrueTypeGX_Free</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Attach_Stream">FT_Attach_Stream</a></td><td><a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_IGNORE_TRANSFORM</a></td><td><a href="ft2-gx_validation.html#FT_TrueTypeGX_Validate">FT_TrueTypeGX_Validate</a></td></tr>
<tr><td><a href="ft2-header_file_macros.html#FT_AUTOHINTER_H">FT_AUTOHINTER_H</a></td><td><a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_LINEAR_DESIGN</a></td><td><a href="ft2-header_file_macros.html#FT_TYPE1_TABLES_H">FT_TYPE1_TABLES_H</a></td></tr>
<tr><td><a href="ft2-auto_hinter.html#FT_AUTOHINTER_SCRIPT_XXX">FT_AUTOHINTER_SCRIPT_CJK</a></td><td><a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_MONOCHROME</a></td><td><a href="ft2-header_file_macros.html#FT_TYPES_H">FT_TYPES_H</a></td></tr>
<tr><td><a href="ft2-auto_hinter.html#FT_AUTOHINTER_SCRIPT_XXX">FT_AUTOHINTER_SCRIPT_INDIC</a></td><td><a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_NO_AUTOHINT</a></td><td><a href="ft2-basic_types.html#FT_UFWord">FT_UFWord</a></td></tr>
<tr><td><a href="ft2-auto_hinter.html#FT_AUTOHINTER_SCRIPT_XXX">FT_AUTOHINTER_SCRIPT_LATIN</a></td><td><a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_NO_BITMAP</a></td><td><a href="ft2-basic_types.html#FT_UInt">FT_UInt</a></td></tr>
<tr><td><a href="ft2-auto_hinter.html#FT_AUTOHINTER_SCRIPT_XXX">FT_AUTOHINTER_SCRIPT_NONE</a></td><td><a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_NO_HINTING</a></td><td><a href="ft2-basic_types.html#FT_UInt16">FT_UInt16</a></td></tr>
<tr><td><a href="ft2-auto_hinter.html#FT_AUTOHINTER_SCRIPT_XXX">FT_AUTOHINTER_SCRIPT_XXX</a></td><td><a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_NO_RECURSE</a></td><td><a href="ft2-basic_types.html#FT_UInt32">FT_UInt32</a></td></tr>
<tr><td><a href="ft2-header_file_macros.html#FT_BBOX_H">FT_BBOX_H</a></td><td><a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_NO_SCALE</a></td><td><a href="ft2-basic_types.html#FT_UInt64">FT_UInt64</a></td></tr>
<tr><td><a href="ft2-basic_types.html#FT_BBox">FT_BBox</a></td><td><a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_PEDANTIC</a></td><td><a href="ft2-basic_types.html#FT_ULong">FT_ULong</a></td></tr>
<tr><td><a href="ft2-header_file_macros.html#FT_BDF_H">FT_BDF_H</a></td><td><a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_RENDER</a></td><td><a href="ft2-header_file_macros.html#FT_UNPATENTED_HINTING_H">FT_UNPATENTED_HINTING_H</a></td></tr>
<tr><td><a href="ft2-header_file_macros.html#FT_BITMAP_H">FT_BITMAP_H</a></td><td><a href="ft2-base_interface.html#FT_LOAD_TARGET_XXX">FT_LOAD_TARGET_LCD</a></td><td><a href="ft2-basic_types.html#FT_UnitVector">FT_UnitVector</a></td></tr>
<tr><td><a href="ft2-basic_types.html#FT_Bitmap">FT_Bitmap</a></td><td><a href="ft2-base_interface.html#FT_LOAD_TARGET_XXX">FT_LOAD_TARGET_LCD_V</a></td><td><a href="ft2-basic_types.html#FT_UShort">FT_UShort</a></td></tr>
<tr><td><a href="ft2-bitmap_handling.html#FT_Bitmap_Convert">FT_Bitmap_Convert</a></td><td><a href="ft2-base_interface.html#FT_LOAD_TARGET_XXX">FT_LOAD_TARGET_LIGHT</a></td><td><a href="ft2-gx_validation.html#FT_VALIDATE_CKERNXXX">FT_VALIDATE_APPLE</a></td></tr>
<tr><td><a href="ft2-bitmap_handling.html#FT_Bitmap_Copy">FT_Bitmap_Copy</a></td><td><a href="ft2-base_interface.html#FT_LOAD_TARGET_MODE">FT_LOAD_TARGET_MODE</a></td><td><a href="ft2-ot_validation.html#FT_VALIDATE_OTXXX">FT_VALIDATE_BASE</a></td></tr>
<tr><td><a href="ft2-bitmap_handling.html#FT_Bitmap_Done">FT_Bitmap_Done</a></td><td><a href="ft2-base_interface.html#FT_LOAD_TARGET_XXX">FT_LOAD_TARGET_MONO</a></td><td><a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_bsln</a></td></tr>
<tr><td><a href="ft2-bitmap_handling.html#FT_Bitmap_Embolden">FT_Bitmap_Embolden</a></td><td><a href="ft2-base_interface.html#FT_LOAD_TARGET_XXX">FT_LOAD_TARGET_NORMAL</a></td><td><a href="ft2-gx_validation.html#FT_VALIDATE_CKERNXXX">FT_VALIDATE_CKERN</a></td></tr>
<tr><td><a href="ft2-bitmap_handling.html#FT_Bitmap_Init">FT_Bitmap_Init</a></td><td><a href="ft2-base_interface.html#FT_LOAD_TARGET_XXX">FT_LOAD_TARGET_XXX</a></td><td><a href="ft2-gx_validation.html#FT_VALIDATE_CKERNXXX">FT_VALIDATE_CKERNXXX</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Bitmap_Size">FT_Bitmap_Size</a></td><td><a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_VERTICAL_LAYOUT</a></td><td><a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_feat</a></td></tr>
<tr><td><a href="ft2-glyph_management.html#FT_BitmapGlyph">FT_BitmapGlyph</a></td><td><a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_XXX</a></td><td><a href="ft2-ot_validation.html#FT_VALIDATE_OTXXX">FT_VALIDATE_GDEF</a></td></tr>
<tr><td><a href="ft2-glyph_management.html#FT_BitmapGlyphRec">FT_BitmapGlyphRec</a></td><td><a href="ft2-base_interface.html#FT_Load_Char">FT_Load_Char</a></td><td><a href="ft2-ot_validation.html#FT_VALIDATE_OTXXX">FT_VALIDATE_GPOS</a></td></tr>
<tr><td><a href="ft2-basic_types.html#FT_Bool">FT_Bool</a></td><td><a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a></td><td><a href="ft2-ot_validation.html#FT_VALIDATE_OTXXX">FT_VALIDATE_GSUB</a></td></tr>
<tr><td><a href="ft2-basic_types.html#FT_Byte">FT_Byte</a></td><td><a href="ft2-truetype_tables.html#FT_Load_Sfnt_Table">FT_Load_Sfnt_Table</a></td><td><a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_GX</a></td></tr>
<tr><td><a href="ft2-basic_types.html#FT_Bytes">FT_Bytes</a></td><td><a href="ft2-basic_types.html#FT_Long">FT_Long</a></td><td><a href="ft2-gx_validation.html#FT_VALIDATE_GX_LENGTH">FT_VALIDATE_GX_LENGTH</a></td></tr>
<tr><td><a href="ft2-header_file_macros.html#FT_BZIP2_H">FT_BZIP2_H</a></td><td><a href="ft2-header_file_macros.html#FT_LZW_H">FT_LZW_H</a></td><td><a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_GXXXX</a></td></tr>
<tr><td><a href="ft2-header_file_macros.html#FT_CACHE_CHARMAP_H">FT_CACHE_CHARMAP_H</a></td><td><a href="ft2-header_file_macros.html#FT_MAC_H">FT_MAC_H</a></td><td><a href="ft2-ot_validation.html#FT_VALIDATE_OTXXX">FT_VALIDATE_JSTF</a></td></tr>
<tr><td><a href="ft2-header_file_macros.html#FT_CACHE_H">FT_CACHE_H</a></td><td><a href="ft2-basic_types.html#FT_MAKE_TAG">FT_MAKE_TAG</a></td><td><a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_just</a></td></tr>
<tr><td><a href="ft2-header_file_macros.html#FT_CACHE_IMAGE_H">FT_CACHE_IMAGE_H</a></td><td><a href="ft2-basic_types.html#FT_Matrix">FT_Matrix</a></td><td><a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_kern</a></td></tr>
<tr><td><a href="ft2-header_file_macros.html#FT_CACHE_SMALL_BITMAPS_H">FT_CACHE_SMALL_BITMAPS_H</a></td><td><a href="ft2-computations.html#FT_Matrix_Invert">FT_Matrix_Invert</a></td><td><a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_lcar</a></td></tr>
<tr><td><a href="ft2-computations.html#FT_CeilFix">FT_CeilFix</a></td><td><a href="ft2-computations.html#FT_Matrix_Multiply">FT_Matrix_Multiply</a></td><td><a href="ft2-ot_validation.html#FT_VALIDATE_OTXXX">FT_VALIDATE_MATH</a></td></tr>
<tr><td><a href="ft2-header_file_macros.html#FT_CFF_DRIVER_H">FT_CFF_DRIVER_H</a></td><td><a href="ft2-system_interface.html#FT_Memory">FT_Memory</a></td><td><a href="ft2-gx_validation.html#FT_VALIDATE_CKERNXXX">FT_VALIDATE_MS</a></td></tr>
<tr><td><a href="ft2-cff_driver.html#FT_CFF_HINTING_XXX">FT_CFF_HINTING_ADOBE</a></td><td><a href="ft2-system_interface.html#FT_MemoryRec">FT_MemoryRec</a></td><td><a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_mort</a></td></tr>
<tr><td><a href="ft2-cff_driver.html#FT_CFF_HINTING_XXX">FT_CFF_HINTING_FREETYPE</a></td><td><a href="ft2-multiple_masters.html#FT_MM_Axis">FT_MM_Axis</a></td><td><a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_morx</a></td></tr>
<tr><td><a href="ft2-cff_driver.html#FT_CFF_HINTING_XXX">FT_CFF_HINTING_XXX</a></td><td><a href="ft2-multiple_masters.html#FT_MM_Var">FT_MM_Var</a></td><td><a href="ft2-ot_validation.html#FT_VALIDATE_OTXXX">FT_VALIDATE_OT</a></td></tr>
<tr><td><a href="ft2-basic_types.html#FT_Char">FT_Char</a></td><td><a href="ft2-header_file_macros.html#FT_MODULE_ERRORS_H">FT_MODULE_ERRORS_H</a></td><td><a href="ft2-ot_validation.html#FT_VALIDATE_OTXXX">FT_VALIDATE_OTXXX</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_CharMap">FT_CharMap</a></td><td><a href="ft2-header_file_macros.html#FT_MODULE_H">FT_MODULE_H</a></td><td><a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_opbd</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_CharMapRec">FT_CharMapRec</a></td><td><a href="ft2-module_management.html#FT_Module">FT_Module</a></td><td><a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_prop</a></td></tr>
<tr><td><a href="ft2-header_file_macros.html#FT_CID_H">FT_CID_H</a></td><td><a href="ft2-module_management.html#FT_Module_Class">FT_Module_Class</a></td><td><a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_trak</a></td></tr>
<tr><td><a href="ft2-gx_validation.html#FT_ClassicKern_Free">FT_ClassicKern_Free</a></td><td><a href="ft2-module_management.html#FT_Module_Constructor">FT_Module_Constructor</a></td><td><a href="ft2-multiple_masters.html#FT_VAR_AXIS_FLAG_XXX">FT_VAR_AXIS_FLAG_HIDDEN</a></td></tr>
<tr><td><a href="ft2-gx_validation.html#FT_ClassicKern_Validate">FT_ClassicKern_Validate</a></td><td><a href="ft2-module_management.html#FT_Module_Destructor">FT_Module_Destructor</a></td><td><a href="ft2-multiple_masters.html#FT_VAR_AXIS_FLAG_XXX">FT_VAR_AXIS_FLAG_XXX</a></td></tr>
<tr><td><a href="ft2-header_file_macros.html#FT_CONFIG_CONFIG_H">FT_CONFIG_CONFIG_H</a></td><td><a href="ft2-module_management.html#FT_Module_Requester">FT_Module_Requester</a></td><td><a href="ft2-multiple_masters.html#FT_Var_Axis">FT_Var_Axis</a></td></tr>
<tr><td><a href="ft2-header_file_macros.html#FT_CONFIG_MODULES_H">FT_CONFIG_MODULES_H</a></td><td><a href="ft2-header_file_macros.html#FT_MULTIPLE_MASTERS_H">FT_MULTIPLE_MASTERS_H</a></td><td><a href="ft2-multiple_masters.html#FT_Var_Named_Style">FT_Var_Named_Style</a></td></tr>
<tr><td><a href="ft2-header_file_macros.html#FT_CONFIG_OPTIONS_H">FT_CONFIG_OPTIONS_H</a></td><td><a href="ft2-computations.html#FT_MulDiv">FT_MulDiv</a></td><td><a href="ft2-basic_types.html#FT_Vector">FT_Vector</a></td></tr>
<tr><td><a href="ft2-header_file_macros.html#FT_CONFIG_STANDARD_LIBRARY_H">FT_CONFIG_STANDARD_LIBRARY_H</a></td><td><a href="ft2-computations.html#FT_MulFix">FT_MulFix</a></td><td><a href="ft2-computations.html#FT_Vector_From_Polar">FT_Vector_From_Polar</a></td></tr>
<tr><td><a href="ft2-computations.html#FT_Cos">FT_Cos</a></td><td><a href="ft2-multiple_masters.html#FT_Multi_Master">FT_Multi_Master</a></td><td><a href="ft2-computations.html#FT_Vector_Length">FT_Vector_Length</a></td></tr>
<tr><td><a href="ft2-basic_types.html#FT_Data">FT_Data</a></td><td><a href="ft2-base_interface.html#FT_New_Face">FT_New_Face</a></td><td><a href="ft2-computations.html#FT_Vector_Polarize">FT_Vector_Polarize</a></td></tr>
<tr><td><a href="ft2-computations.html#FT_DivFix">FT_DivFix</a></td><td><a href="ft2-mac_specific.html#FT_New_Face_From_FOND">FT_New_Face_From_FOND</a></td><td><a href="ft2-computations.html#FT_Vector_Rotate">FT_Vector_Rotate</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Done_Face">FT_Done_Face</a></td><td><a href="ft2-mac_specific.html#FT_New_Face_From_FSRef">FT_New_Face_From_FSRef</a></td><td><a href="ft2-computations.html#FT_Vector_Transform">FT_Vector_Transform</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Done_FreeType">FT_Done_FreeType</a></td><td><a href="ft2-mac_specific.html#FT_New_Face_From_FSSpec">FT_New_Face_From_FSSpec</a></td><td><a href="ft2-computations.html#FT_Vector_Unit">FT_Vector_Unit</a></td></tr>
<tr><td><a href="ft2-glyph_management.html#FT_Done_Glyph">FT_Done_Glyph</a></td><td><a href="ft2-module_management.html#FT_New_Library">FT_New_Library</a></td><td><a href="ft2-header_file_macros.html#FT_WINFONTS_H">FT_WINFONTS_H</a></td></tr>
<tr><td><a href="ft2-module_management.html#FT_Done_Library">FT_Done_Library</a></td><td><a href="ft2-base_interface.html#FT_New_Memory_Face">FT_New_Memory_Face</a></td><td><a href="ft2-winfnt_fonts.html#FT_WinFNT_Header">FT_WinFNT_Header</a></td></tr>
<tr><td><a href="ft2-sizes_management.html#FT_Done_Size">FT_Done_Size</a></td><td><a href="ft2-sizes_management.html#FT_New_Size">FT_New_Size</a></td><td><a href="ft2-winfnt_fonts.html#FT_WinFNT_HeaderRec">FT_WinFNT_HeaderRec</a></td></tr>
<tr><td><a href="ft2-module_management.html#FT_Driver">FT_Driver</a></td><td><a href="ft2-basic_types.html#FT_Offset">FT_Offset</a></td><td><a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_XXX">FT_WinFNT_ID_CP1250</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_ENC_TAG">FT_ENC_TAG</a></td><td><a href="ft2-base_interface.html#FT_OPEN_XXX">FT_OPEN_DRIVER</a></td><td><a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_XXX">FT_WinFNT_ID_CP1251</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Encoding">FT_ENCODING_ADOBE_CUSTOM</a></td><td><a href="ft2-base_interface.html#FT_OPEN_XXX">FT_OPEN_MEMORY</a></td><td><a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_XXX">FT_WinFNT_ID_CP1252</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Encoding">FT_ENCODING_ADOBE_EXPERT</a></td><td><a href="ft2-base_interface.html#FT_OPEN_XXX">FT_OPEN_PARAMS</a></td><td><a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_XXX">FT_WinFNT_ID_CP1253</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Encoding">FT_ENCODING_ADOBE_LATIN_1</a></td><td><a href="ft2-base_interface.html#FT_OPEN_XXX">FT_OPEN_PATHNAME</a></td><td><a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_XXX">FT_WinFNT_ID_CP1254</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Encoding">FT_ENCODING_ADOBE_STANDARD</a></td><td><a href="ft2-base_interface.html#FT_OPEN_XXX">FT_OPEN_STREAM</a></td><td><a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_XXX">FT_WinFNT_ID_CP1255</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Encoding">FT_ENCODING_APPLE_ROMAN</a></td><td><a href="ft2-base_interface.html#FT_OPEN_XXX">FT_OPEN_XXX</a></td><td><a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_XXX">FT_WinFNT_ID_CP1256</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Encoding">FT_ENCODING_BIG5</a></td><td><a href="ft2-header_file_macros.html#FT_OPENTYPE_VALIDATE_H">FT_OPENTYPE_VALIDATE_H</a></td><td><a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_XXX">FT_WinFNT_ID_CP1257</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Encoding">FT_ENCODING_JOHAB</a></td><td><a href="ft2-base_interface.html#FT_Open_Args">FT_Open_Args</a></td><td><a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_XXX">FT_WinFNT_ID_CP1258</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Encoding">FT_ENCODING_MS_BIG5</a></td><td><a href="ft2-base_interface.html#FT_Open_Face">FT_Open_Face</a></td><td><a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_XXX">FT_WinFNT_ID_CP1361</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Encoding">FT_ENCODING_MS_GB2312</a></td><td><a href="ft2-ot_validation.html#FT_OpenType_Free">FT_OpenType_Free</a></td><td><a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_XXX">FT_WinFNT_ID_CP874</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Encoding">FT_ENCODING_MS_JOHAB</a></td><td><a href="ft2-ot_validation.html#FT_OpenType_Validate">FT_OpenType_Validate</a></td><td><a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_XXX">FT_WinFNT_ID_CP932</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Encoding">FT_ENCODING_MS_SJIS</a></td><td><a href="ft2-outline_processing.html#FT_Orientation">FT_ORIENTATION_FILL_LEFT</a></td><td><a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_XXX">FT_WinFNT_ID_CP936</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Encoding">FT_ENCODING_MS_SYMBOL</a></td><td><a href="ft2-outline_processing.html#FT_Orientation">FT_ORIENTATION_FILL_RIGHT</a></td><td><a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_XXX">FT_WinFNT_ID_CP949</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Encoding">FT_ENCODING_MS_WANSUNG</a></td><td><a href="ft2-outline_processing.html#FT_Orientation">FT_ORIENTATION_NONE</a></td><td><a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_XXX">FT_WinFNT_ID_CP950</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Encoding">FT_ENCODING_NONE</a></td><td><a href="ft2-outline_processing.html#FT_Orientation">FT_ORIENTATION_POSTSCRIPT</a></td><td><a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_XXX">FT_WinFNT_ID_DEFAULT</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Encoding">FT_ENCODING_OLD_LATIN_2</a></td><td><a href="ft2-outline_processing.html#FT_Orientation">FT_ORIENTATION_TRUETYPE</a></td><td><a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_XXX">FT_WinFNT_ID_MAC</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Encoding">FT_ENCODING_PRC</a></td><td><a href="ft2-outline_processing.html#FT_Orientation">FT_Orientation</a></td><td><a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_XXX">FT_WinFNT_ID_OEM</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Encoding">FT_ENCODING_SJIS</a></td><td><a href="ft2-outline_processing.html#FT_OUTLINE_XXX">FT_OUTLINE_EVEN_ODD_FILL</a></td><td><a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_XXX">FT_WinFNT_ID_SYMBOL</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Encoding">FT_ENCODING_UNICODE</a></td><td><a href="ft2-header_file_macros.html#FT_OUTLINE_H">FT_OUTLINE_H</a></td><td><a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_XXX">FT_WinFNT_ID_XXX</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Encoding">FT_ENCODING_WANSUNG</a></td><td><a href="ft2-outline_processing.html#FT_OUTLINE_XXX">FT_OUTLINE_HIGH_PRECISION</a></td><td><a href="ft2-cache_subsystem.html#FTC_CMapCache">FTC_CMapCache</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Encoding">FT_Encoding</a></td><td><a href="ft2-outline_processing.html#FT_OUTLINE_XXX">FT_OUTLINE_IGNORE_DROPOUTS</a></td><td><a href="ft2-cache_subsystem.html#FTC_CMapCache_Lookup">FTC_CMapCache_Lookup</a></td></tr>
<tr><td><a href="ft2-header_file_macros.html#FT_ERRORS_H">FT_ERRORS_H</a></td><td><a href="ft2-outline_processing.html#FT_OUTLINE_XXX">FT_OUTLINE_INCLUDE_STUBS</a></td><td><a href="ft2-cache_subsystem.html#FTC_CMapCache_New">FTC_CMapCache_New</a></td></tr>
<tr><td><a href="ft2-error_code_values.html#FT_Err_XXX">FT_Err_XXX</a></td><td><a href="ft2-outline_processing.html#FT_OUTLINE_XXX">FT_OUTLINE_NONE</a></td><td><a href="ft2-cache_subsystem.html#FTC_Face_Requester">FTC_Face_Requester</a></td></tr>
<tr><td><a href="ft2-basic_types.html#FT_Error">FT_Error</a></td><td><a href="ft2-outline_processing.html#FT_OUTLINE_XXX">FT_OUTLINE_OWNER</a></td><td><a href="ft2-cache_subsystem.html#FTC_FaceID">FTC_FaceID</a></td></tr>
<tr><td><a href="ft2-basic_types.html#FT_F26Dot6">FT_F26Dot6</a></td><td><a href="ft2-outline_processing.html#FT_OUTLINE_XXX">FT_OUTLINE_REVERSE_FILL</a></td><td><a href="ft2-cache_subsystem.html#FTC_ImageCache">FTC_ImageCache</a></td></tr>
<tr><td><a href="ft2-basic_types.html#FT_F2Dot14">FT_F2Dot14</a></td><td><a href="ft2-outline_processing.html#FT_OUTLINE_XXX">FT_OUTLINE_SINGLE_PASS</a></td><td><a href="ft2-cache_subsystem.html#FTC_ImageCache_Lookup">FTC_ImageCache_Lookup</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_FACE_FLAG_XXX">FT_FACE_FLAG_CID_KEYED</a></td><td><a href="ft2-outline_processing.html#FT_OUTLINE_XXX">FT_OUTLINE_SMART_DROPOUTS</a></td><td><a href="ft2-cache_subsystem.html#FTC_ImageCache_LookupScaler">FTC_ImageCache_LookupScaler</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_FACE_FLAG_XXX">FT_FACE_FLAG_COLOR</a></td><td><a href="ft2-outline_processing.html#FT_OUTLINE_XXX">FT_OUTLINE_XXX</a></td><td><a href="ft2-cache_subsystem.html#FTC_ImageCache_New">FTC_ImageCache_New</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_FACE_FLAG_XXX">FT_FACE_FLAG_EXTERNAL_STREAM</a></td><td><a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a></td><td><a href="ft2-cache_subsystem.html#FTC_ImageType">FTC_ImageType</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_FACE_FLAG_XXX">FT_FACE_FLAG_FAST_GLYPHS</a></td><td><a href="ft2-outline_processing.html#FT_Outline_Check">FT_Outline_Check</a></td><td><a href="ft2-cache_subsystem.html#FTC_ImageTypeRec">FTC_ImageTypeRec</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_FACE_FLAG_XXX">FT_FACE_FLAG_FIXED_SIZES</a></td><td><a href="ft2-outline_processing.html#FT_Outline_ConicToFunc">FT_Outline_ConicToFunc</a></td><td><a href="ft2-cache_subsystem.html#FTC_Manager">FTC_Manager</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_FACE_FLAG_XXX">FT_FACE_FLAG_FIXED_WIDTH</a></td><td><a href="ft2-outline_processing.html#FT_Outline_Copy">FT_Outline_Copy</a></td><td><a href="ft2-cache_subsystem.html#FTC_Manager_Done">FTC_Manager_Done</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_FACE_FLAG_XXX">FT_FACE_FLAG_GLYPH_NAMES</a></td><td><a href="ft2-outline_processing.html#FT_Outline_CubicToFunc">FT_Outline_CubicToFunc</a></td><td><a href="ft2-cache_subsystem.html#FTC_Manager_LookupFace">FTC_Manager_LookupFace</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_FACE_FLAG_XXX">FT_FACE_FLAG_HINTER</a></td><td><a href="ft2-outline_processing.html#FT_Outline_Decompose">FT_Outline_Decompose</a></td><td><a href="ft2-cache_subsystem.html#FTC_Manager_LookupSize">FTC_Manager_LookupSize</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_FACE_FLAG_XXX">FT_FACE_FLAG_HORIZONTAL</a></td><td><a href="ft2-outline_processing.html#FT_Outline_Done">FT_Outline_Done</a></td><td><a href="ft2-cache_subsystem.html#FTC_Manager_New">FTC_Manager_New</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_FACE_FLAG_XXX">FT_FACE_FLAG_KERNING</a></td><td><a href="ft2-outline_processing.html#FT_Outline_Embolden">FT_Outline_Embolden</a></td><td><a href="ft2-cache_subsystem.html#FTC_Manager_RemoveFaceID">FTC_Manager_RemoveFaceID</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_FACE_FLAG_XXX">FT_FACE_FLAG_MULTIPLE_MASTERS</a></td><td><a href="ft2-outline_processing.html#FT_Outline_EmboldenXY">FT_Outline_EmboldenXY</a></td><td><a href="ft2-cache_subsystem.html#FTC_Manager_Reset">FTC_Manager_Reset</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_FACE_FLAG_XXX">FT_FACE_FLAG_SCALABLE</a></td><td><a href="ft2-outline_processing.html#FT_Outline_Funcs">FT_Outline_Funcs</a></td><td><a href="ft2-cache_subsystem.html#FTC_Node">FTC_Node</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_FACE_FLAG_XXX">FT_FACE_FLAG_SFNT</a></td><td><a href="ft2-outline_processing.html#FT_Outline_Get_BBox">FT_Outline_Get_BBox</a></td><td><a href="ft2-cache_subsystem.html#FTC_Node_Unref">FTC_Node_Unref</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_FACE_FLAG_XXX">FT_FACE_FLAG_TRICKY</a></td><td><a href="ft2-outline_processing.html#FT_Outline_Get_Bitmap">FT_Outline_Get_Bitmap</a></td><td><a href="ft2-cache_subsystem.html#FTC_SBit">FTC_SBit</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_FACE_FLAG_XXX">FT_FACE_FLAG_VERTICAL</a></td><td><a href="ft2-outline_processing.html#FT_Outline_Get_CBox">FT_Outline_Get_CBox</a></td><td><a href="ft2-cache_subsystem.html#FTC_SBitCache">FTC_SBitCache</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_FACE_FLAG_XXX">FT_FACE_FLAG_XXX</a></td><td><a href="ft2-outline_processing.html#FT_Outline_Get_Orientation">FT_Outline_Get_Orientation</a></td><td><a href="ft2-cache_subsystem.html#FTC_SBitCache_Lookup">FTC_SBitCache_Lookup</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Face">FT_Face</a></td><td><a href="ft2-glyph_stroker.html#FT_Outline_GetInsideBorder">FT_Outline_GetInsideBorder</a></td><td><a href="ft2-cache_subsystem.html#FTC_SBitCache_LookupScaler">FTC_SBitCache_LookupScaler</a></td></tr>
<tr><td><a href="ft2-version.html#FT_Face_CheckTrueTypePatents">FT_Face_CheckTrueTypePatents</a></td><td><a href="ft2-glyph_stroker.html#FT_Outline_GetOutsideBorder">FT_Outline_GetOutsideBorder</a></td><td><a href="ft2-cache_subsystem.html#FTC_SBitCache_New">FTC_SBitCache_New</a></td></tr>
<tr><td><a href="ft2-glyph_variants.html#FT_Face_GetCharsOfVariant">FT_Face_GetCharsOfVariant</a></td><td><a href="ft2-outline_processing.html#FT_Outline_LineToFunc">FT_Outline_LineToFunc</a></td><td><a href="ft2-cache_subsystem.html#FTC_SBitRec">FTC_SBitRec</a></td></tr>
<tr><td><a href="ft2-glyph_variants.html#FT_Face_GetCharVariantIndex">FT_Face_GetCharVariantIndex</a></td><td><a href="ft2-outline_processing.html#FT_Outline_MoveToFunc">FT_Outline_MoveToFunc</a></td><td><a href="ft2-cache_subsystem.html#FTC_Scaler">FTC_Scaler</a></td></tr>
<tr><td><a href="ft2-glyph_variants.html#FT_Face_GetCharVariantIsDefault">FT_Face_GetCharVariantIsDefault</a></td><td><a href="ft2-outline_processing.html#FT_Outline_New">FT_Outline_New</a></td><td><a href="ft2-cache_subsystem.html#FTC_ScalerRec">FTC_ScalerRec</a></td></tr>
<tr><td><a href="ft2-glyph_variants.html#FT_Face_GetVariantSelectors">FT_Face_GetVariantSelectors</a></td><td><a href="ft2-outline_processing.html#FT_Outline_Render">FT_Outline_Render</a></td><td><a href="ft2-auto_hinter.html#fallback-script">fallback-script</a></td></tr>
<tr><td><a href="ft2-glyph_variants.html#FT_Face_GetVariantsOfChar">FT_Face_GetVariantsOfChar</a></td><td><a href="ft2-outline_processing.html#FT_Outline_Reverse">FT_Outline_Reverse</a></td><td><a href="ft2-auto_hinter.html#glyph-to-script-map">glyph-to-script-map</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Face_Internal">FT_Face_Internal</a></td><td><a href="ft2-outline_processing.html#FT_Outline_Transform">FT_Outline_Transform</a></td><td><a href="ft2-cff_driver.html#hinting-engine(cff)">hinting-engine (cff)</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Face_Properties">FT_Face_Properties</a></td><td><a href="ft2-outline_processing.html#FT_Outline_Translate">FT_Outline_Translate</a></td><td><a href="ft2-auto_hinter.html#increase-x-height">increase-x-height</a></td></tr>
<tr><td><a href="ft2-version.html#FT_Face_SetUnpatentedHinting">FT_Face_SetUnpatentedHinting</a></td><td><a href="ft2-glyph_management.html#FT_OutlineGlyph">FT_OutlineGlyph</a></td><td><a href="ft2-tt_driver.html#interpreter-version">interpreter-version</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_FaceRec">FT_FaceRec</a></td><td><a href="ft2-glyph_management.html#FT_OutlineGlyphRec">FT_OutlineGlyphRec</a></td><td><a href="ft2-pcf_driver.html#no-long-family-names">no-long-family-names</a></td></tr>
<tr><td><a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a></td><td><a href="ft2-sfnt_names.html#FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY">FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY</a></td><td><a href="ft2-auto_hinter.html#no-stem-darkening(autofit)">no-stem-darkening (autofit)</a></td></tr>
<tr><td><a href="ft2-computations.html#FT_FloorFix">FT_FloorFix</a></td><td><a href="ft2-sfnt_names.html#FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY">FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY</a></td><td><a href="ft2-cff_driver.html#no-stem-darkening(cff)">no-stem-darkening (cff)</a></td></tr>
<tr><td><a href="ft2-header_file_macros.html#FT_FONT_FORMATS_H">FT_FONT_FORMATS_H</a></td><td><a href="ft2-incremental.html#FT_PARAM_TAG_INCREMENTAL">FT_PARAM_TAG_INCREMENTAL</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_BLUE_FUZZ</a></td></tr>
<tr><td><a href="ft2-header_file_macros.html#FT_FREETYPE_H">FT_FREETYPE_H</a></td><td><a href="ft2-lcd_filtering.html#FT_PARAM_TAG_LCD_FILTER_WEIGHTS">FT_PARAM_TAG_LCD_FILTER_WEIGHTS</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_BLUE_SCALE</a></td></tr>
<tr><td><a href="ft2-system_interface.html#FT_Free_Func">FT_Free_Func</a></td><td><a href="ft2-cff_driver.html#FT_PARAM_TAG_RANDOM_SEED">FT_PARAM_TAG_RANDOM_SEED</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_BLUE_SHIFT</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_FSTYPE_XXX">FT_FSTYPE_BITMAP_EMBEDDING_ONLY</a></td><td><a href="ft2-auto_hinter.html#FT_PARAM_TAG_STEM_DARKENING">FT_PARAM_TAG_STEM_DARKENING</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_BLUE_VALUE</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_FSTYPE_XXX">FT_FSTYPE_EDITABLE_EMBEDDING</a></td><td><a href="ft2-truetype_tables.html#FT_PARAM_TAG_UNPATENTED_HINTING">FT_PARAM_TAG_UNPATENTED_HINTING</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_CHAR_STRING</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_FSTYPE_XXX">FT_FSTYPE_INSTALLABLE_EMBEDDING</a></td><td><a href="ft2-base_interface.html#FT_Parameter">FT_Parameter</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_CHAR_STRING_KEY</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_FSTYPE_XXX">FT_FSTYPE_NO_SUBSETTING</a></td><td><a href="ft2-header_file_macros.html#FT_PCF_DRIVER_H">FT_PCF_DRIVER_H</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_ENCODING_ENTRY</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_FSTYPE_XXX">FT_FSTYPE_PREVIEW_AND_PRINT_EMBEDDING</a></td><td><a href="ft2-header_file_macros.html#FT_PFR_H">FT_PFR_H</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_ENCODING_TYPE</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_FSTYPE_XXX">FT_FSTYPE_RESTRICTED_LICENSE_EMBEDDING</a></td><td><a href="ft2-basic_types.html#FT_Pixel_Mode">FT_PIXEL_MODE_BGRA</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_FAMILY_BLUE</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_FSTYPE_XXX">FT_FSTYPE_XXX</a></td><td><a href="ft2-basic_types.html#FT_Pixel_Mode">FT_PIXEL_MODE_GRAY</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_FAMILY_NAME</a></td></tr>
<tr><td><a href="ft2-basic_types.html#FT_FWord">FT_FWord</a></td><td><a href="ft2-basic_types.html#FT_Pixel_Mode">FT_PIXEL_MODE_GRAY2</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_FAMILY_OTHER_BLUE</a></td></tr>
<tr><td><a href="ft2-gasp_table.html#FT_GASP_XXX">FT_GASP_DO_GRAY</a></td><td><a href="ft2-basic_types.html#FT_Pixel_Mode">FT_PIXEL_MODE_GRAY4</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_FONT_BBOX</a></td></tr>
<tr><td><a href="ft2-gasp_table.html#FT_GASP_XXX">FT_GASP_DO_GRIDFIT</a></td><td><a href="ft2-basic_types.html#FT_Pixel_Mode">FT_PIXEL_MODE_LCD</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_FONT_MATRIX</a></td></tr>
<tr><td><a href="ft2-header_file_macros.html#FT_GASP_H">FT_GASP_H</a></td><td><a href="ft2-basic_types.html#FT_Pixel_Mode">FT_PIXEL_MODE_LCD_V</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_FONT_NAME</a></td></tr>
<tr><td><a href="ft2-gasp_table.html#FT_GASP_XXX">FT_GASP_NO_TABLE</a></td><td><a href="ft2-basic_types.html#FT_Pixel_Mode">FT_PIXEL_MODE_MONO</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_FONT_TYPE</a></td></tr>
<tr><td><a href="ft2-gasp_table.html#FT_GASP_XXX">FT_GASP_SYMMETRIC_GRIDFIT</a></td><td><a href="ft2-basic_types.html#FT_Pixel_Mode">FT_PIXEL_MODE_NONE</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_FORCE_BOLD</a></td></tr>
<tr><td><a href="ft2-gasp_table.html#FT_GASP_XXX">FT_GASP_SYMMETRIC_SMOOTHING</a></td><td><a href="ft2-basic_types.html#FT_Pixel_Mode">FT_Pixel_Mode</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_FS_TYPE</a></td></tr>
<tr><td><a href="ft2-gasp_table.html#FT_GASP_XXX">FT_GASP_XXX</a></td><td><a href="ft2-basic_types.html#FT_Pointer">FT_Pointer</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_FULL_NAME</a></td></tr>
<tr><td><a href="ft2-basic_types.html#FT_Generic">FT_Generic</a></td><td><a href="ft2-basic_types.html#FT_Pos">FT_Pos</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_IS_FIXED_PITCH</a></td></tr>
<tr><td><a href="ft2-basic_types.html#FT_Generic_Finalizer">FT_Generic_Finalizer</a></td><td><a href="ft2-auto_hinter.html#FT_Prop_GlyphToScriptMap">FT_Prop_GlyphToScriptMap</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_ITALIC_ANGLE</a></td></tr>
<tr><td><a href="ft2-quick_advance.html#FT_Get_Advance">FT_Get_Advance</a></td><td><a href="ft2-auto_hinter.html#FT_Prop_IncreaseXHeight">FT_Prop_IncreaseXHeight</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_LANGUAGE_GROUP</a></td></tr>
<tr><td><a href="ft2-quick_advance.html#FT_Get_Advances">FT_Get_Advances</a></td><td><a href="ft2-module_management.html#FT_Property_Get">FT_Property_Get</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_LEN_IV</a></td></tr>
<tr><td><a href="ft2-bdf_fonts.html#FT_Get_BDF_Charset_ID">FT_Get_BDF_Charset_ID</a></td><td><a href="ft2-module_management.html#FT_Property_Set">FT_Property_Set</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_MIN_FEATURE</a></td></tr>
<tr><td><a href="ft2-bdf_fonts.html#FT_Get_BDF_Property">FT_Get_BDF_Property</a></td><td><a href="ft2-basic_types.html#FT_PtrDist">FT_PtrDist</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_NOTICE</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Get_Char_Index">FT_Get_Char_Index</a></td><td><a href="ft2-raster.html#FT_RASTER_FLAG_XXX">FT_RASTER_FLAG_AA</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_NUM_BLUE_VALUES</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Get_Charmap_Index">FT_Get_Charmap_Index</a></td><td><a href="ft2-raster.html#FT_RASTER_FLAG_XXX">FT_RASTER_FLAG_CLIP</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_NUM_CHAR_STRINGS</a></td></tr>
<tr><td><a href="ft2-cid_fonts.html#FT_Get_CID_From_Glyph_Index">FT_Get_CID_From_Glyph_Index</a></td><td><a href="ft2-raster.html#FT_RASTER_FLAG_XXX">FT_RASTER_FLAG_DEFAULT</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_NUM_FAMILY_BLUES</a></td></tr>
<tr><td><a href="ft2-cid_fonts.html#FT_Get_CID_Is_Internally_CID_Keyed">FT_Get_CID_Is_Internally_CID_Keyed</a></td><td><a href="ft2-raster.html#FT_RASTER_FLAG_XXX">FT_RASTER_FLAG_DIRECT</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_NUM_FAMILY_OTHER_BLUES</a></td></tr>
<tr><td><a href="ft2-cid_fonts.html#FT_Get_CID_Registry_Ordering_Supplement">FT_Get_CID_Registry_Ordering_Supplement</a></td><td><a href="ft2-raster.html#FT_RASTER_FLAG_XXX">FT_RASTER_FLAG_XXX</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_NUM_OTHER_BLUES</a></td></tr>
<tr><td><a href="ft2-truetype_tables.html#FT_Get_CMap_Format">FT_Get_CMap_Format</a></td><td><a href="ft2-raster.html#FT_Raster">FT_Raster</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_NUM_STEM_SNAP_H</a></td></tr>
<tr><td><a href="ft2-truetype_tables.html#FT_Get_CMap_Language_ID">FT_Get_CMap_Language_ID</a></td><td><a href="ft2-raster.html#FT_Raster_BitSet_Func">FT_Raster_BitSet_Func</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_NUM_STEM_SNAP_V</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Get_First_Char">FT_Get_First_Char</a></td><td><a href="ft2-raster.html#FT_Raster_BitTest_Func">FT_Raster_BitTest_Func</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_NUM_SUBRS</a></td></tr>
<tr><td><a href="ft2-font_formats.html#FT_Get_Font_Format">FT_Get_Font_Format</a></td><td><a href="ft2-raster.html#FT_Raster_DoneFunc">FT_Raster_DoneFunc</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_OTHER_BLUE</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Get_FSType_Flags">FT_Get_FSType_Flags</a></td><td><a href="ft2-raster.html#FT_Raster_Funcs">FT_Raster_Funcs</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_PAINT_TYPE</a></td></tr>
<tr><td><a href="ft2-gasp_table.html#FT_Get_Gasp">FT_Get_Gasp</a></td><td><a href="ft2-raster.html#FT_Raster_NewFunc">FT_Raster_NewFunc</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_PASSWORD</a></td></tr>
<tr><td><a href="ft2-glyph_management.html#FT_Get_Glyph">FT_Get_Glyph</a></td><td><a href="ft2-raster.html#FT_Raster_Params">FT_Raster_Params</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_RND_STEM_UP</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Get_Glyph_Name">FT_Get_Glyph_Name</a></td><td><a href="ft2-raster.html#FT_Raster_RenderFunc">FT_Raster_RenderFunc</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_STD_HW</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Get_Kerning">FT_Get_Kerning</a></td><td><a href="ft2-raster.html#FT_Raster_ResetFunc">FT_Raster_ResetFunc</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_STD_VW</a></td></tr>
<tr><td><a href="ft2-multiple_masters.html#FT_Get_MM_Blend_Coordinates">FT_Get_MM_Blend_Coordinates</a></td><td><a href="ft2-raster.html#FT_Raster_SetModeFunc">FT_Raster_SetModeFunc</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_STEM_SNAP_H</a></td></tr>
<tr><td><a href="ft2-multiple_masters.html#FT_Get_MM_Var">FT_Get_MM_Var</a></td><td><a href="ft2-header_file_macros.html#FT_RENDER_H">FT_RENDER_H</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_STEM_SNAP_V</a></td></tr>
<tr><td><a href="ft2-module_management.html#FT_Get_Module">FT_Get_Module</a></td><td><a href="ft2-base_interface.html#FT_Render_Mode">FT_RENDER_MODE_LCD</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_SUBR</a></td></tr>
<tr><td><a href="ft2-multiple_masters.html#FT_Get_Multi_Master">FT_Get_Multi_Master</a></td><td><a href="ft2-base_interface.html#FT_Render_Mode">FT_RENDER_MODE_LCD_V</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_UNDERLINE_POSITION</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Get_Name_Index">FT_Get_Name_Index</a></td><td><a href="ft2-base_interface.html#FT_Render_Mode">FT_RENDER_MODE_LIGHT</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_UNDERLINE_THICKNESS</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Get_Next_Char">FT_Get_Next_Char</a></td><td><a href="ft2-base_interface.html#FT_Render_Mode">FT_RENDER_MODE_MONO</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_UNIQUE_ID</a></td></tr>
<tr><td><a href="ft2-pfr_fonts.html#FT_Get_PFR_Advance">FT_Get_PFR_Advance</a></td><td><a href="ft2-base_interface.html#FT_Render_Mode">FT_RENDER_MODE_NORMAL</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_VERSION</a></td></tr>
<tr><td><a href="ft2-pfr_fonts.html#FT_Get_PFR_Kerning">FT_Get_PFR_Kerning</a></td><td><a href="ft2-system_interface.html#FT_Realloc_Func">FT_Realloc_Func</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_DICT_WEIGHT</a></td></tr>
<tr><td><a href="ft2-pfr_fonts.html#FT_Get_PFR_Metrics">FT_Get_PFR_Metrics</a></td><td><a href="ft2-base_interface.html#FT_Reference_Face">FT_Reference_Face</a></td><td><a href="ft2-type1_tables.html#PS_Dict_Keys">PS_Dict_Keys</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Get_Postscript_Name">FT_Get_Postscript_Name</a></td><td><a href="ft2-module_management.html#FT_Reference_Library">FT_Reference_Library</a></td><td><a href="ft2-type1_tables.html#PS_FontInfo">PS_FontInfo</a></td></tr>
<tr><td><a href="ft2-type1_tables.html#FT_Get_PS_Font_Info">FT_Get_PS_Font_Info</a></td><td><a href="ft2-module_management.html#FT_Remove_Module">FT_Remove_Module</a></td><td><a href="ft2-type1_tables.html#PS_FontInfoRec">PS_FontInfoRec</a></td></tr>
<tr><td><a href="ft2-type1_tables.html#FT_Get_PS_Font_Private">FT_Get_PS_Font_Private</a></td><td><a href="ft2-base_interface.html#FT_Render_Glyph">FT_Render_Glyph</a></td><td><a href="ft2-type1_tables.html#PS_Private">PS_Private</a></td></tr>
<tr><td><a href="ft2-type1_tables.html#FT_Get_PS_Font_Value">FT_Get_PS_Font_Value</a></td><td><a href="ft2-base_interface.html#FT_Render_Mode">FT_Render_Mode</a></td><td><a href="ft2-type1_tables.html#PS_PrivateRec">PS_PrivateRec</a></td></tr>
<tr><td><a href="ft2-module_management.html#FT_Get_Renderer">FT_Get_Renderer</a></td><td><a href="ft2-module_management.html#FT_Renderer">FT_Renderer</a></td><td><a href="ft2-cff_driver.html#random-seed">random-seed</a></td></tr>
<tr><td><a href="ft2-sfnt_names.html#FT_Get_Sfnt_LangTag">FT_Get_Sfnt_LangTag</a></td><td><a href="ft2-module_management.html#FT_Renderer_Class">FT_Renderer_Class</a></td><td><a href="ft2-type1_tables.html#T1_Blend_Flags">T1_BLEND_BLUE_SCALE</a></td></tr>
<tr><td><a href="ft2-sfnt_names.html#FT_Get_Sfnt_Name">FT_Get_Sfnt_Name</a></td><td><a href="ft2-base_interface.html#FT_Request_Size">FT_Request_Size</a></td><td><a href="ft2-type1_tables.html#T1_Blend_Flags">T1_BLEND_BLUE_SHIFT</a></td></tr>
<tr><td><a href="ft2-sfnt_names.html#FT_Get_Sfnt_Name_Count">FT_Get_Sfnt_Name_Count</a></td><td><a href="ft2-computations.html#FT_RoundFix">FT_RoundFix</a></td><td><a href="ft2-type1_tables.html#T1_Blend_Flags">T1_BLEND_BLUE_VALUES</a></td></tr>
<tr><td><a href="ft2-truetype_tables.html#FT_Get_Sfnt_Table">FT_Get_Sfnt_Table</a></td><td><a href="ft2-base_interface.html#FT_Select_Charmap">FT_Select_Charmap</a></td><td><a href="ft2-type1_tables.html#T1_Blend_Flags">T1_BLEND_FAMILY_BLUES</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Get_SubGlyph_Info">FT_Get_SubGlyph_Info</a></td><td><a href="ft2-base_interface.html#FT_Select_Size">FT_Select_Size</a></td><td><a href="ft2-type1_tables.html#T1_Blend_Flags">T1_BLEND_FAMILY_OTHER_BLUES</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Get_Track_Kerning">FT_Get_Track_Kerning</a></td><td><a href="ft2-base_interface.html#FT_Set_Char_Size">FT_Set_Char_Size</a></td><td><a href="ft2-type1_tables.html#T1_Blend_Flags">T1_BLEND_FORCE_BOLD</a></td></tr>
<tr><td><a href="ft2-truetype_engine.html#FT_Get_TrueType_Engine_Type">FT_Get_TrueType_Engine_Type</a></td><td><a href="ft2-base_interface.html#FT_Set_Charmap">FT_Set_Charmap</a></td><td><a href="ft2-type1_tables.html#T1_Blend_Flags">T1_BLEND_ITALIC_ANGLE</a></td></tr>
<tr><td><a href="ft2-multiple_masters.html#FT_Get_Var_Axis_Flags">FT_Get_Var_Axis_Flags</a></td><td><a href="ft2-module_management.html#FT_Set_Debug_Hook">FT_Set_Debug_Hook</a></td><td><a href="ft2-type1_tables.html#T1_Blend_Flags">T1_BLEND_OTHER_BLUES</a></td></tr>
<tr><td><a href="ft2-multiple_masters.html#FT_Get_Var_Blend_Coordinates">FT_Get_Var_Blend_Coordinates</a></td><td><a href="ft2-module_management.html#FT_Set_Default_Properties">FT_Set_Default_Properties</a></td><td><a href="ft2-type1_tables.html#T1_Blend_Flags">T1_BLEND_STANDARD_HEIGHT</a></td></tr>
<tr><td><a href="ft2-multiple_masters.html#FT_Get_Var_Design_Coordinates">FT_Get_Var_Design_Coordinates</a></td><td><a href="ft2-multiple_masters.html#FT_Set_MM_Blend_Coordinates">FT_Set_MM_Blend_Coordinates</a></td><td><a href="ft2-type1_tables.html#T1_Blend_Flags">T1_BLEND_STANDARD_WIDTH</a></td></tr>
<tr><td><a href="ft2-winfnt_fonts.html#FT_Get_WinFNT_Header">FT_Get_WinFNT_Header</a></td><td><a href="ft2-multiple_masters.html#FT_Set_MM_Design_Coordinates">FT_Set_MM_Design_Coordinates</a></td><td><a href="ft2-type1_tables.html#T1_Blend_Flags">T1_BLEND_STEM_SNAP_HEIGHTS</a></td></tr>
<tr><td><a href="ft2-mac_specific.html#FT_GetFile_From_Mac_ATS_Name">FT_GetFile_From_Mac_ATS_Name</a></td><td><a href="ft2-base_interface.html#FT_Set_Pixel_Sizes">FT_Set_Pixel_Sizes</a></td><td><a href="ft2-type1_tables.html#T1_Blend_Flags">T1_BLEND_STEM_SNAP_WIDTHS</a></td></tr>
<tr><td><a href="ft2-mac_specific.html#FT_GetFile_From_Mac_Name">FT_GetFile_From_Mac_Name</a></td><td><a href="ft2-module_management.html#FT_Set_Renderer">FT_Set_Renderer</a></td><td><a href="ft2-type1_tables.html#T1_Blend_Flags">T1_BLEND_UNDERLINE_POSITION</a></td></tr>
<tr><td><a href="ft2-mac_specific.html#FT_GetFilePath_From_Mac_ATS_Name">FT_GetFilePath_From_Mac_ATS_Name</a></td><td><a href="ft2-base_interface.html#FT_Set_Transform">FT_Set_Transform</a></td><td><a href="ft2-type1_tables.html#T1_Blend_Flags">T1_BLEND_UNDERLINE_THICKNESS</a></td></tr>
<tr><td><a href="ft2-glyph_management.html#FT_Glyph_BBox_Mode">FT_GLYPH_BBOX_GRIDFIT</a></td><td><a href="ft2-multiple_masters.html#FT_Set_Var_Blend_Coordinates">FT_Set_Var_Blend_Coordinates</a></td><td><a href="ft2-type1_tables.html#T1_Blend_Flags">T1_Blend_Flags</a></td></tr>
<tr><td><a href="ft2-glyph_management.html#FT_Glyph_BBox_Mode">FT_GLYPH_BBOX_PIXELS</a></td><td><a href="ft2-multiple_masters.html#FT_Set_Var_Design_Coordinates">FT_Set_Var_Design_Coordinates</a></td><td><a href="ft2-type1_tables.html#T1_EncodingType">T1_ENCODING_TYPE_ARRAY</a></td></tr>
<tr><td><a href="ft2-glyph_management.html#FT_Glyph_BBox_Mode">FT_GLYPH_BBOX_SUBPIXELS</a></td><td><a href="ft2-truetype_tables.html#FT_Sfnt_Tag">FT_SFNT_HEAD</a></td><td><a href="ft2-type1_tables.html#T1_EncodingType">T1_ENCODING_TYPE_EXPERT</a></td></tr>
<tr><td><a href="ft2-glyph_management.html#FT_Glyph_BBox_Mode">FT_GLYPH_BBOX_TRUNCATE</a></td><td><a href="ft2-truetype_tables.html#FT_Sfnt_Tag">FT_SFNT_HHEA</a></td><td><a href="ft2-type1_tables.html#T1_EncodingType">T1_ENCODING_TYPE_ISOLATIN1</a></td></tr>
<tr><td><a href="ft2-glyph_management.html#FT_Glyph_BBox_Mode">FT_GLYPH_BBOX_UNSCALED</a></td><td><a href="ft2-truetype_tables.html#FT_Sfnt_Tag">FT_SFNT_MAXP</a></td><td><a href="ft2-type1_tables.html#T1_EncodingType">T1_ENCODING_TYPE_NONE</a></td></tr>
<tr><td><a href="ft2-basic_types.html#FT_Glyph_Format">FT_GLYPH_FORMAT_BITMAP</a></td><td><a href="ft2-header_file_macros.html#FT_SFNT_NAMES_H">FT_SFNT_NAMES_H</a></td><td><a href="ft2-type1_tables.html#T1_EncodingType">T1_ENCODING_TYPE_STANDARD</a></td></tr>
<tr><td><a href="ft2-basic_types.html#FT_Glyph_Format">FT_GLYPH_FORMAT_COMPOSITE</a></td><td><a href="ft2-truetype_tables.html#FT_Sfnt_Tag">FT_SFNT_OS2</a></td><td><a href="ft2-type1_tables.html#T1_EncodingType">T1_EncodingType</a></td></tr>
<tr><td><a href="ft2-basic_types.html#FT_Glyph_Format">FT_GLYPH_FORMAT_NONE</a></td><td><a href="ft2-truetype_tables.html#FT_Sfnt_Tag">FT_SFNT_PCLT</a></td><td><a href="ft2-type1_tables.html#T1_FontInfo">T1_FontInfo</a></td></tr>
<tr><td><a href="ft2-basic_types.html#FT_Glyph_Format">FT_GLYPH_FORMAT_OUTLINE</a></td><td><a href="ft2-truetype_tables.html#FT_Sfnt_Tag">FT_SFNT_POST</a></td><td><a href="ft2-type1_tables.html#T1_Private">T1_Private</a></td></tr>
<tr><td><a href="ft2-basic_types.html#FT_Glyph_Format">FT_GLYPH_FORMAT_PLOTTER</a></td><td><a href="ft2-truetype_tables.html#FT_Sfnt_Tag">FT_SFNT_VHEA</a></td><td><a href="ft2-truetype_tables.html#TT_ADOBE_ID_XXX">TT_ADOBE_ID_CUSTOM</a></td></tr>
<tr><td><a href="ft2-header_file_macros.html#FT_GLYPH_H">FT_GLYPH_H</a></td><td><a href="ft2-truetype_tables.html#FT_Sfnt_Table_Info">FT_Sfnt_Table_Info</a></td><td><a href="ft2-truetype_tables.html#TT_ADOBE_ID_XXX">TT_ADOBE_ID_EXPERT</a></td></tr>
<tr><td><a href="ft2-glyph_management.html#FT_Glyph">FT_Glyph</a></td><td><a href="ft2-truetype_tables.html#FT_Sfnt_Tag">FT_Sfnt_Tag</a></td><td><a href="ft2-truetype_tables.html#TT_ADOBE_ID_XXX">TT_ADOBE_ID_LATIN_1</a></td></tr>
<tr><td><a href="ft2-glyph_management.html#FT_Glyph_BBox_Mode">FT_Glyph_BBox_Mode</a></td><td><a href="ft2-sfnt_names.html#FT_SfntLangTag">FT_SfntLangTag</a></td><td><a href="ft2-truetype_tables.html#TT_ADOBE_ID_XXX">TT_ADOBE_ID_STANDARD</a></td></tr>
<tr><td><a href="ft2-glyph_management.html#FT_Glyph_Copy">FT_Glyph_Copy</a></td><td><a href="ft2-sfnt_names.html#FT_SfntName">FT_SfntName</a></td><td><a href="ft2-truetype_tables.html#TT_ADOBE_ID_XXX">TT_ADOBE_ID_XXX</a></td></tr>
<tr><td><a href="ft2-basic_types.html#FT_Glyph_Format">FT_Glyph_Format</a></td><td><a href="ft2-basic_types.html#FT_Short">FT_Short</a></td><td><a href="ft2-truetype_tables.html#TT_APPLE_ID_XXX">TT_APPLE_ID_DEFAULT</a></td></tr>
<tr><td><a href="ft2-glyph_management.html#FT_Glyph_Get_CBox">FT_Glyph_Get_CBox</a></td><td><a href="ft2-base_interface.html#FT_Size_Request_Type">FT_SIZE_REQUEST_TYPE_BBOX</a></td><td><a href="ft2-truetype_tables.html#TT_APPLE_ID_XXX">TT_APPLE_ID_FULL_UNICODE</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Glyph_Metrics">FT_Glyph_Metrics</a></td><td><a href="ft2-base_interface.html#FT_Size_Request_Type">FT_SIZE_REQUEST_TYPE_CELL</a></td><td><a href="ft2-truetype_tables.html#TT_APPLE_ID_XXX">TT_APPLE_ID_ISO_10646</a></td></tr>
<tr><td><a href="ft2-glyph_stroker.html#FT_Glyph_Stroke">FT_Glyph_Stroke</a></td><td><a href="ft2-base_interface.html#FT_Size_Request_Type">FT_SIZE_REQUEST_TYPE_NOMINAL</a></td><td><a href="ft2-truetype_tables.html#TT_APPLE_ID_XXX">TT_APPLE_ID_UNICODE_1_1</a></td></tr>
<tr><td><a href="ft2-glyph_stroker.html#FT_Glyph_StrokeBorder">FT_Glyph_StrokeBorder</a></td><td><a href="ft2-base_interface.html#FT_Size_Request_Type">FT_SIZE_REQUEST_TYPE_REAL_DIM</a></td><td><a href="ft2-truetype_tables.html#TT_APPLE_ID_XXX">TT_APPLE_ID_UNICODE_2_0</a></td></tr>
<tr><td><a href="ft2-glyph_management.html#FT_Glyph_To_Bitmap">FT_Glyph_To_Bitmap</a></td><td><a href="ft2-base_interface.html#FT_Size_Request_Type">FT_SIZE_REQUEST_TYPE_SCALES</a></td><td><a href="ft2-truetype_tables.html#TT_APPLE_ID_XXX">TT_APPLE_ID_UNICODE_32</a></td></tr>
<tr><td><a href="ft2-glyph_management.html#FT_Glyph_Transform">FT_Glyph_Transform</a></td><td><a href="ft2-header_file_macros.html#FT_SIZES_H">FT_SIZES_H</a></td><td><a href="ft2-truetype_tables.html#TT_APPLE_ID_XXX">TT_APPLE_ID_VARIANT_SELECTOR</a></td></tr>
<tr><td><a href="ft2-glyph_management.html#FT_GlyphRec">FT_GlyphRec</a></td><td><a href="ft2-computations.html#FT_Sin">FT_Sin</a></td><td><a href="ft2-truetype_tables.html#TT_APPLE_ID_XXX">TT_APPLE_ID_XXX</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_GlyphSlot">FT_GlyphSlot</a></td><td><a href="ft2-base_interface.html#FT_Size">FT_Size</a></td><td><a href="ft2-truetype_tables.html#TT_Header">TT_Header</a></td></tr>
<tr><td><a href="ft2-bitmap_handling.html#FT_GlyphSlot_Own_Bitmap">FT_GlyphSlot_Own_Bitmap</a></td><td><a href="ft2-base_interface.html#FT_Size_Internal">FT_Size_Internal</a></td><td><a href="ft2-truetype_tables.html#TT_HoriHeader">TT_HoriHeader</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_GlyphSlotRec">FT_GlyphSlotRec</a></td><td><a href="ft2-base_interface.html#FT_Size_Metrics">FT_Size_Metrics</a></td><td><a href="ft2-tt_driver.html#TT_INTERPRETER_VERSION_XXX">TT_INTERPRETER_VERSION_35</a></td></tr>
<tr><td><a href="ft2-header_file_macros.html#FT_GX_VALIDATE_H">FT_GX_VALIDATE_H</a></td><td><a href="ft2-base_interface.html#FT_Size_Request">FT_Size_Request</a></td><td><a href="ft2-tt_driver.html#TT_INTERPRETER_VERSION_XXX">TT_INTERPRETER_VERSION_38</a></td></tr>
<tr><td><a href="ft2-header_file_macros.html#FT_GZIP_H">FT_GZIP_H</a></td><td><a href="ft2-base_interface.html#FT_Size_Request_Type">FT_Size_Request_Type</a></td><td><a href="ft2-tt_driver.html#TT_INTERPRETER_VERSION_XXX">TT_INTERPRETER_VERSION_40</a></td></tr>
<tr><td><a href="ft2-gzip.html#FT_Gzip_Uncompress">FT_Gzip_Uncompress</a></td><td><a href="ft2-base_interface.html#FT_Size_RequestRec">FT_Size_RequestRec</a></td><td><a href="ft2-tt_driver.html#TT_INTERPRETER_VERSION_XXX">TT_INTERPRETER_VERSION_XXX</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_HAS_COLOR">FT_HAS_COLOR</a></td><td><a href="ft2-base_interface.html#FT_SizeRec">FT_SizeRec</a></td><td><a href="ft2-truetype_tables.html#TT_ISO_ID_XXX">TT_ISO_ID_10646</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_HAS_FAST_GLYPHS">FT_HAS_FAST_GLYPHS</a></td><td><a href="ft2-base_interface.html#FT_Slot_Internal">FT_Slot_Internal</a></td><td><a href="ft2-truetype_tables.html#TT_ISO_ID_XXX">TT_ISO_ID_7BIT_ASCII</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_HAS_FIXED_SIZES">FT_HAS_FIXED_SIZES</a></td><td><a href="ft2-raster.html#FT_Span">FT_Span</a></td><td><a href="ft2-truetype_tables.html#TT_ISO_ID_XXX">TT_ISO_ID_8859_1</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_HAS_GLYPH_NAMES">FT_HAS_GLYPH_NAMES</a></td><td><a href="ft2-raster.html#FT_SpanFunc">FT_SpanFunc</a></td><td><a href="ft2-truetype_tables.html#TT_ISO_ID_XXX">TT_ISO_ID_XXX</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_HAS_HORIZONTAL">FT_HAS_HORIZONTAL</a></td><td><a href="ft2-glyph_stroker.html#FT_StrokerBorder">FT_STROKER_BORDER_LEFT</a></td><td><a href="ft2-truetype_tables.html#TT_MAC_ID_XXX">TT_MAC_ID_XXX</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_HAS_KERNING">FT_HAS_KERNING</a></td><td><a href="ft2-glyph_stroker.html#FT_StrokerBorder">FT_STROKER_BORDER_RIGHT</a></td><td><a href="ft2-truetype_tables.html#TT_MAC_LANGID_XXX">TT_MAC_LANGID_XXX</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_HAS_MULTIPLE_MASTERS">FT_HAS_MULTIPLE_MASTERS</a></td><td><a href="ft2-header_file_macros.html#FT_STROKER_H">FT_STROKER_H</a></td><td><a href="ft2-truetype_tables.html#TT_MaxProfile">TT_MaxProfile</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_HAS_VERTICAL">FT_HAS_VERTICAL</a></td><td><a href="ft2-glyph_stroker.html#FT_Stroker_LineCap">FT_STROKER_LINECAP_BUTT</a></td><td><a href="ft2-truetype_tables.html#TT_MS_ID_XXX">TT_MS_ID_BIG_5</a></td></tr>
<tr><td><a href="ft2-type1_tables.html#FT_Has_PS_Glyph_Names">FT_Has_PS_Glyph_Names</a></td><td><a href="ft2-glyph_stroker.html#FT_Stroker_LineCap">FT_STROKER_LINECAP_ROUND</a></td><td><a href="ft2-truetype_tables.html#TT_MS_ID_XXX">TT_MS_ID_JOHAB</a></td></tr>
<tr><td><a href="ft2-header_file_macros.html#FT_IMAGE_H">FT_IMAGE_H</a></td><td><a href="ft2-glyph_stroker.html#FT_Stroker_LineCap">FT_STROKER_LINECAP_SQUARE</a></td><td><a href="ft2-truetype_tables.html#TT_MS_ID_XXX">TT_MS_ID_PRC</a></td></tr>
<tr><td><a href="ft2-basic_types.html#FT_IMAGE_TAG">FT_IMAGE_TAG</a></td><td><a href="ft2-glyph_stroker.html#FT_Stroker_LineJoin">FT_STROKER_LINEJOIN_BEVEL</a></td><td><a href="ft2-truetype_tables.html#TT_MS_ID_XXX">TT_MS_ID_SJIS</a></td></tr>
<tr><td><a href="ft2-header_file_macros.html#FT_INCREMENTAL_H">FT_INCREMENTAL_H</a></td><td><a href="ft2-glyph_stroker.html#FT_Stroker_LineJoin">FT_STROKER_LINEJOIN_MITER</a></td><td><a href="ft2-truetype_tables.html#TT_MS_ID_XXX">TT_MS_ID_SYMBOL_CS</a></td></tr>
<tr><td><a href="ft2-incremental.html#FT_Incremental">FT_Incremental</a></td><td><a href="ft2-glyph_stroker.html#FT_Stroker_LineJoin">FT_STROKER_LINEJOIN_MITER_FIXED</a></td><td><a href="ft2-truetype_tables.html#TT_MS_ID_XXX">TT_MS_ID_UCS_4</a></td></tr>
<tr><td><a href="ft2-incremental.html#FT_Incremental_FreeGlyphDataFunc">FT_Incremental_FreeGlyphDataFunc</a></td><td><a href="ft2-glyph_stroker.html#FT_Stroker_LineJoin">FT_STROKER_LINEJOIN_MITER_VARIABLE</a></td><td><a href="ft2-truetype_tables.html#TT_MS_ID_XXX">TT_MS_ID_UNICODE_CS</a></td></tr>
<tr><td><a href="ft2-incremental.html#FT_Incremental_FuncsRec">FT_Incremental_FuncsRec</a></td><td><a href="ft2-glyph_stroker.html#FT_Stroker_LineJoin">FT_STROKER_LINEJOIN_ROUND</a></td><td><a href="ft2-truetype_tables.html#TT_MS_ID_XXX">TT_MS_ID_WANSUNG</a></td></tr>
<tr><td><a href="ft2-incremental.html#FT_Incremental_GetGlyphDataFunc">FT_Incremental_GetGlyphDataFunc</a></td><td><a href="ft2-base_interface.html#FT_STYLE_FLAG_XXX">FT_STYLE_FLAG_BOLD</a></td><td><a href="ft2-truetype_tables.html#TT_MS_ID_XXX">TT_MS_ID_XXX</a></td></tr>
<tr><td><a href="ft2-incremental.html#FT_Incremental_GetGlyphMetricsFunc">FT_Incremental_GetGlyphMetricsFunc</a></td><td><a href="ft2-base_interface.html#FT_STYLE_FLAG_XXX">FT_STYLE_FLAG_ITALIC</a></td><td><a href="ft2-truetype_tables.html#TT_MS_LANGID_XXX">TT_MS_LANGID_XXX</a></td></tr>
<tr><td><a href="ft2-incremental.html#FT_Incremental_Interface">FT_Incremental_Interface</a></td><td><a href="ft2-base_interface.html#FT_STYLE_FLAG_XXX">FT_STYLE_FLAG_XXX</a></td><td><a href="ft2-truetype_tables.html#TT_NAME_ID_XXX">TT_NAME_ID_XXX</a></td></tr>
<tr><td><a href="ft2-incremental.html#FT_Incremental_InterfaceRec">FT_Incremental_InterfaceRec</a></td><td><a href="ft2-system_interface.html#FT_Stream">FT_Stream</a></td><td><a href="ft2-truetype_tables.html#TT_OS2">TT_OS2</a></td></tr>
<tr><td><a href="ft2-incremental.html#FT_Incremental_Metrics">FT_Incremental_Metrics</a></td><td><a href="ft2-system_interface.html#FT_Stream_CloseFunc">FT_Stream_CloseFunc</a></td><td><a href="ft2-truetype_tables.html#TT_PCLT">TT_PCLT</a></td></tr>
<tr><td><a href="ft2-incremental.html#FT_Incremental_MetricsRec">FT_Incremental_MetricsRec</a></td><td><a href="ft2-system_interface.html#FT_Stream_IoFunc">FT_Stream_IoFunc</a></td><td><a href="ft2-truetype_tables.html#TT_PLATFORM_XXX">TT_PLATFORM_ADOBE</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Init_FreeType">FT_Init_FreeType</a></td><td><a href="ft2-bzip2.html#FT_Stream_OpenBzip2">FT_Stream_OpenBzip2</a></td><td><a href="ft2-truetype_tables.html#TT_PLATFORM_XXX">TT_PLATFORM_APPLE_UNICODE</a></td></tr>
<tr><td><a href="ft2-basic_types.html#FT_Int">FT_Int</a></td><td><a href="ft2-gzip.html#FT_Stream_OpenGzip">FT_Stream_OpenGzip</a></td><td><a href="ft2-truetype_tables.html#TT_PLATFORM_XXX">TT_PLATFORM_CUSTOM</a></td></tr>
<tr><td><a href="ft2-basic_types.html#FT_Int16">FT_Int16</a></td><td><a href="ft2-lzw.html#FT_Stream_OpenLZW">FT_Stream_OpenLZW</a></td><td><a href="ft2-truetype_tables.html#TT_PLATFORM_XXX">TT_PLATFORM_ISO</a></td></tr>
<tr><td><a href="ft2-basic_types.html#FT_Int32">FT_Int32</a></td><td><a href="ft2-system_interface.html#FT_StreamDesc">FT_StreamDesc</a></td><td><a href="ft2-truetype_tables.html#TT_PLATFORM_XXX">TT_PLATFORM_MACINTOSH</a></td></tr>
<tr><td><a href="ft2-basic_types.html#FT_Int64">FT_Int64</a></td><td><a href="ft2-system_interface.html#FT_StreamRec">FT_StreamRec</a></td><td><a href="ft2-truetype_tables.html#TT_PLATFORM_XXX">TT_PLATFORM_MICROSOFT</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_IS_CID_KEYED">FT_IS_CID_KEYED</a></td><td><a href="ft2-basic_types.html#FT_String">FT_String</a></td><td><a href="ft2-truetype_tables.html#TT_PLATFORM_XXX">TT_PLATFORM_XXX</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_IS_FIXED_WIDTH">FT_IS_FIXED_WIDTH</a></td><td><a href="ft2-glyph_stroker.html#FT_Stroker">FT_Stroker</a></td><td><a href="ft2-truetype_tables.html#TT_Postscript">TT_Postscript</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_IS_NAMED_INSTANCE">FT_IS_NAMED_INSTANCE</a></td><td><a href="ft2-glyph_stroker.html#FT_Stroker_BeginSubPath">FT_Stroker_BeginSubPath</a></td><td><a href="ft2-truetype_tables.html#TT_UCR_XXX">TT_UCR_XXX</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_IS_SCALABLE">FT_IS_SCALABLE</a></td><td><a href="ft2-glyph_stroker.html#FT_Stroker_ConicTo">FT_Stroker_ConicTo</a></td><td><a href="ft2-truetype_tables.html#TT_VertHeader">TT_VertHeader</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_IS_SFNT">FT_IS_SFNT</a></td><td><a href="ft2-glyph_stroker.html#FT_Stroker_CubicTo">FT_Stroker_CubicTo</a></td><td><a href="ft2-auto_hinter.html#warping">warping</a></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_IS_TRICKY">FT_IS_TRICKY</a></td><td><a href="ft2-glyph_stroker.html#FT_Stroker_Done">FT_Stroker_Done</a></td><td></td></tr>
<tr><td><a href="ft2-base_interface.html#FT_Kerning_Mode">FT_KERNING_DEFAULT</a></td><td><a href="ft2-glyph_stroker.html#FT_Stroker_EndSubPath">FT_Stroker_EndSubPath</a></td><td></td></tr>
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<table class="index-toc-link"><tr><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table>
<div class="timestamp">generated on Sat Sep 16 19:09:11 2017</div></body>
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<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table>
<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="lcd_filtering">LCD Filtering</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_LcdFilter">FT_LcdFilter</a></td><td><a href="#FT_Library_SetLcdFilterWeights">FT_Library_SetLcdFilterWeights</a></td></tr>
<tr><td><a href="#FT_Library_SetLcdFilter">FT_Library_SetLcdFilter</a></td><td><a href="#FT_PARAM_TAG_LCD_FILTER_WEIGHTS">FT_PARAM_TAG_LCD_FILTER_WEIGHTS</a></td></tr>
</table>
<p>Should you #define FT_CONFIG_OPTION_SUBPIXEL_RENDERING in your &lsquo;ftoption.h&rsquo;, which enables patented ClearType-style rendering, the LCD-optimized glyph bitmaps should be filtered to reduce color fringes inherent to this technology. The default FreeType LCD rendering uses different technology, and API described below, although available, does nothing.</p>
<p>ClearType-style LCD rendering exploits the color-striped structure of LCD pixels, increasing the available resolution in the direction of the stripe (usually horizontal RGB) by a factor of&nbsp;3. Since these subpixels are color pixels, using them unfiltered creates severe color fringes. Use the <a href="ft2-lcd_filtering.html#FT_Library_SetLcdFilter">FT_Library_SetLcdFilter</a> API to specify a low-pass filter, which is then applied to subpixel-rendered bitmaps generated through <a href="ft2-base_interface.html#FT_Render_Glyph">FT_Render_Glyph</a>. The filter sacrifices some of the higher resolution to reduce color fringes, making the glyph image slightly blurrier. Positional improvements will remain.</p>
<p>A filter should have two properties:</p>
<p>1) It should be normalized, meaning the sum of the 5&nbsp;components should be 256 (0x100). It is possible to go above or under this target sum, however: going under means tossing out contrast, going over means invoking clamping and thereby non-linearities that increase contrast somewhat at the expense of greater distortion and color-fringing. Contrast is better enhanced through stem darkening.</p>
<p>2) It should be color-balanced, meaning a filter &lsquo;{&nbsp;a, b, c, b, a&nbsp;}&rsquo; where a&nbsp;+ b&nbsp;=&nbsp;c. It distributes the computed coverage for one subpixel to all subpixels equally, sacrificing some won resolution but drastically reducing color-fringing. Positioning improvements remain! Note that color-fringing can only really be minimized when using a color-balanced filter and alpha-blending the glyph onto a surface in linear space; see <a href="ft2-base_interface.html#FT_Render_Glyph">FT_Render_Glyph</a>.</p>
<p>Regarding the form, a filter can be a &lsquo;boxy&rsquo; filter or a &lsquo;beveled&rsquo; filter. Boxy filters are sharper but are less forgiving of non-ideal gamma curves of a screen (viewing angles!), beveled filters are fuzzier but more tolerant.</p>
<p>Examples:</p>
<p>- [0x10 0x40 0x70 0x40 0x10] is beveled and neither balanced nor normalized.</p>
<p>- [0x1A 0x33 0x4D 0x33 0x1A] is beveled and balanced but not normalized.</p>
<p>- [0x19 0x33 0x66 0x4c 0x19] is beveled and normalized but not balanced.</p>
<p>- [0x00 0x4c 0x66 0x4c 0x00] is boxily beveled and normalized but not balanced.</p>
<p>- [0x00 0x55 0x56 0x55 0x00] is boxy, normalized, and almost balanced.</p>
<p>- [0x08 0x4D 0x56 0x4D 0x08] is beveled, normalized and, almost balanced.</p>
<p>The filter affects glyph bitmaps rendered through <a href="ft2-base_interface.html#FT_Render_Glyph">FT_Render_Glyph</a>, <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a>, and <a href="ft2-base_interface.html#FT_Load_Char">FT_Load_Char</a>. It does <i>not</i> affect the output of <a href="ft2-outline_processing.html#FT_Outline_Render">FT_Outline_Render</a> and <a href="ft2-outline_processing.html#FT_Outline_Get_Bitmap">FT_Outline_Get_Bitmap</a>.</p>
<p>If this feature is activated, the dimensions of LCD glyph bitmaps are either wider or taller than the dimensions of the corresponding outline with regard to the pixel grid. For example, for <a href="ft2-base_interface.html#FT_Render_Mode">FT_RENDER_MODE_LCD</a>, the filter adds 3&nbsp;subpixels to the left, and 3&nbsp;subpixels to the right. The bitmap offset values are adjusted accordingly, so clients shouldn't need to modify their layout and glyph positioning code when enabling the filter.</p>
<p>It is important to understand that linear alpha blending and gamma correction is critical for correctly rendering glyphs onto surfaces without artifacts and even more critical when subpixel rendering is involved.</p>
<p>Each of the 3&nbsp;alpha values (subpixels) is independently used to blend one color channel. That is, red alpha blends the red channel of the text color with the red channel of the background pixel. The distribution of density values by the color-balanced filter assumes alpha blending is done in linear space; only then color artifacts cancel out.</p>
<div class="section">
<h3 id="FT_LcdFilter">FT_LcdFilter</h3>
<p>Defined in FT_LCD_FILTER_H (freetype/ftlcdfil.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">enum</span> FT_LcdFilter_
{
<a href="ft2-lcd_filtering.html#FT_LCD_FILTER_NONE">FT_LCD_FILTER_NONE</a> = 0,
<a href="ft2-lcd_filtering.html#FT_LCD_FILTER_DEFAULT">FT_LCD_FILTER_DEFAULT</a> = 1,
<a href="ft2-lcd_filtering.html#FT_LCD_FILTER_LIGHT">FT_LCD_FILTER_LIGHT</a> = 2,
<a href="ft2-lcd_filtering.html#FT_LCD_FILTER_LEGACY1">FT_LCD_FILTER_LEGACY1</a> = 3,
<a href="ft2-lcd_filtering.html#FT_LCD_FILTER_LEGACY">FT_LCD_FILTER_LEGACY</a> = 16,
FT_LCD_FILTER_MAX /* do not remove */
} <b>FT_LcdFilter</b>;
</pre>
<p>A list of values to identify various types of LCD filters.</p>
<h4>values</h4>
<table class="fields">
<tr><td class="val" id="FT_LCD_FILTER_NONE">FT_LCD_FILTER_NONE</td><td class="desc">
<p>Do not perform filtering. When used with subpixel rendering, this results in sometimes severe color fringes.</p>
</td></tr>
<tr><td class="val" id="FT_LCD_FILTER_DEFAULT">FT_LCD_FILTER_DEFAULT</td><td class="desc">
<p>The default filter reduces color fringes considerably, at the cost of a slight blurriness in the output.</p>
<p>It is a beveled, normalized, and color-balanced five-tap filter that is more forgiving to screens with non-ideal gamma curves and viewing angles. Note that while color-fringing is reduced, it can only be minimized by using linear alpha blending and gamma correction to render glyphs onto surfaces. The default filter weights are [0x08 0x4D 0x56 0x4D 0x08].</p>
</td></tr>
<tr><td class="val" id="FT_LCD_FILTER_LIGHT">FT_LCD_FILTER_LIGHT</td><td class="desc">
<p>The light filter is a variant that is sharper at the cost of slightly more color fringes than the default one.</p>
<p>It is a boxy, normalized, and color-balanced three-tap filter that is less forgiving to screens with non-ideal gamma curves and viewing angles. This filter works best when the rendering system uses linear alpha blending and gamma correction to render glyphs onto surfaces. The light filter weights are [0x00 0x55 0x56 0x55 0x00].</p>
</td></tr>
<tr><td class="val" id="FT_LCD_FILTER_LEGACY">FT_LCD_FILTER_LEGACY</td><td class="desc">
<p>This filter corresponds to the original libXft color filter. It provides high contrast output but can exhibit really bad color fringes if glyphs are not extremely well hinted to the pixel grid. In other words, it only works well if the TrueType bytecode interpreter is enabled <b>and</b> high-quality hinted fonts are used.</p>
<p>This filter is only provided for comparison purposes, and might be disabled or stay unsupported in the future.</p>
</td></tr>
<tr><td class="val" id="FT_LCD_FILTER_LEGACY1">FT_LCD_FILTER_LEGACY1</td><td class="desc">
<p>For historical reasons, the FontConfig library returns a different enumeration value for legacy LCD filtering. To make code work that (incorrectly) forwards FontConfig's enumeration value to <a href="ft2-lcd_filtering.html#FT_Library_SetLcdFilter">FT_Library_SetLcdFilter</a> without proper mapping, it is thus easiest to have another enumeration value, which is completely equal to &lsquo;FT_LCD_FILTER_LEGACY&rsquo;.</p>
</td></tr>
</table>
<h4>since</h4>
<p>2.3.0 (&lsquo;FT_LCD_FILTER_LEGACY1&rsquo; since 2.6.2)</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Library_SetLcdFilter">FT_Library_SetLcdFilter</h3>
<p>Defined in FT_LCD_FILTER_H (freetype/ftlcdfil.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Library_SetLcdFilter</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library,
<a href="ft2-lcd_filtering.html#FT_LcdFilter">FT_LcdFilter</a> filter );
</pre>
<p>This function is used to apply color filtering to LCD decimated bitmaps, like the ones used when calling <a href="ft2-base_interface.html#FT_Render_Glyph">FT_Render_Glyph</a> with <a href="ft2-base_interface.html#FT_Render_Mode">FT_RENDER_MODE_LCD</a> or <a href="ft2-base_interface.html#FT_Render_Mode">FT_RENDER_MODE_LCD_V</a>.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="library">library</td><td class="desc">
<p>A handle to the target library instance.</p>
</td></tr>
<tr><td class="val" id="filter">filter</td><td class="desc">
<p>The filter type.</p>
<p>You can use <a href="ft2-lcd_filtering.html#FT_LcdFilter">FT_LCD_FILTER_NONE</a> here to disable this feature, or <a href="ft2-lcd_filtering.html#FT_LcdFilter">FT_LCD_FILTER_DEFAULT</a> to use a default filter that should work well on most LCD screens.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>This feature is always disabled by default. Clients must make an explicit call to this function with a &lsquo;filter&rsquo; value other than <a href="ft2-lcd_filtering.html#FT_LcdFilter">FT_LCD_FILTER_NONE</a> in order to enable it.</p>
<p>Due to <b>PATENTS</b> covering subpixel rendering, this function doesn't do anything except returning &lsquo;FT_Err_Unimplemented_Feature&rsquo; if the configuration macro FT_CONFIG_OPTION_SUBPIXEL_RENDERING is not defined in your build of the library, which should correspond to all default builds of FreeType.</p>
<h4>since</h4>
<p>2.3.0</p>
<hr>
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<div class="section">
<h3 id="FT_Library_SetLcdFilterWeights">FT_Library_SetLcdFilterWeights</h3>
<p>Defined in FT_LCD_FILTER_H (freetype/ftlcdfil.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Library_SetLcdFilterWeights</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library,
<span class="keyword">unsigned</span> <span class="keyword">char</span> *weights );
</pre>
<p>This function can be used to enable LCD filter with custom weights, instead of using presets in <a href="ft2-lcd_filtering.html#FT_Library_SetLcdFilter">FT_Library_SetLcdFilter</a>.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="library">library</td><td class="desc">
<p>A handle to the target library instance.</p>
</td></tr>
<tr><td class="val" id="weights">weights</td><td class="desc">
<p>A pointer to an array; the function copies the first five bytes and uses them to specify the filter weights.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>Due to <b>PATENTS</b> covering subpixel rendering, this function doesn't do anything except returning &lsquo;FT_Err_Unimplemented_Feature&rsquo; if the configuration macro FT_CONFIG_OPTION_SUBPIXEL_RENDERING is not defined in your build of the library, which should correspond to all default builds of FreeType.</p>
<p>LCD filter weights can also be set per face using <a href="ft2-base_interface.html#FT_Face_Properties">FT_Face_Properties</a> with <a href="ft2-lcd_filtering.html#FT_PARAM_TAG_LCD_FILTER_WEIGHTS">FT_PARAM_TAG_LCD_FILTER_WEIGHTS</a>.</p>
<h4>since</h4>
<p>2.4.0</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_PARAM_TAG_LCD_FILTER_WEIGHTS">FT_PARAM_TAG_LCD_FILTER_WEIGHTS</h3>
<p>Defined in FT_LCD_FILTER_H (freetype/ftlcdfil.h).</p>
<pre>
#define <b>FT_PARAM_TAG_LCD_FILTER_WEIGHTS</b> \
<a href="ft2-basic_types.html#FT_MAKE_TAG">FT_MAKE_TAG</a>( 'l', 'c', 'd', 'f' )
/*
* @type:
* FT_LcdFiveTapFilter
*
* @description:
* A <span class="keyword">typedef</span> for passing the five LCD filter weights to
* @<a href="ft2-base_interface.html#FT_Face_Properties">FT_Face_Properties</a> within an @<a href="ft2-base_interface.html#FT_Parameter">FT_Parameter</a> structure.
*
*/
#define FT_LCD_FILTER_FIVE_TAPS 5
<span class="keyword">typedef</span> <a href="ft2-basic_types.html#FT_Byte">FT_Byte</a> FT_LcdFiveTapFilter[FT_LCD_FILTER_FIVE_TAPS];
</pre>
<p>An <a href="ft2-base_interface.html#FT_Parameter">FT_Parameter</a> tag to be used with <a href="ft2-base_interface.html#FT_Face_Properties">FT_Face_Properties</a>. The corresponding argument specifies the five LCD filter weights for a given face (if using <a href="ft2-base_interface.html#FT_LOAD_TARGET_XXX">FT_LOAD_TARGET_LCD</a>, for example), overriding the global default values or the values set up with <a href="ft2-lcd_filtering.html#FT_Library_SetLcdFilterWeights">FT_Library_SetLcdFilterWeights</a>.</p>
<hr>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="list_processing">List Processing</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_List">FT_List</a></td><td><a href="#FT_List_Add">FT_List_Add</a></td><td><a href="#FT_List_Iterate">FT_List_Iterate</a></td></tr>
<tr><td><a href="#FT_ListNode">FT_ListNode</a></td><td><a href="#FT_List_Insert">FT_List_Insert</a></td><td><a href="#FT_List_Iterator">FT_List_Iterator</a></td></tr>
<tr><td><a href="#FT_ListRec">FT_ListRec</a></td><td><a href="#FT_List_Find">FT_List_Find</a></td><td><a href="#FT_List_Finalize">FT_List_Finalize</a></td></tr>
<tr><td><a href="#FT_ListNodeRec">FT_ListNodeRec</a></td><td><a href="#FT_List_Remove">FT_List_Remove</a></td><td><a href="#FT_List_Destructor">FT_List_Destructor</a></td></tr>
<tr><td>&nbsp;</td><td><a href="#FT_List_Up">FT_List_Up</a></td><td></td></tr>
</table>
<p>This section contains various definitions related to list processing using doubly-linked nodes.</p>
<div class="section">
<h3 id="FT_List">FT_List</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_ListRec_* <b>FT_List</b>;
</pre>
<p>A handle to a list record (see <a href="ft2-list_processing.html#FT_ListRec">FT_ListRec</a>).</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_ListNode">FT_ListNode</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_ListNodeRec_* <b>FT_ListNode</b>;
</pre>
<p>Many elements and objects in FreeType are listed through an <a href="ft2-list_processing.html#FT_List">FT_List</a> record (see <a href="ft2-list_processing.html#FT_ListRec">FT_ListRec</a>). As its name suggests, an FT_ListNode is a handle to a single list element.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_ListRec">FT_ListRec</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_ListRec_
{
<a href="ft2-list_processing.html#FT_ListNode">FT_ListNode</a> head;
<a href="ft2-list_processing.html#FT_ListNode">FT_ListNode</a> tail;
} <b>FT_ListRec</b>;
</pre>
<p>A structure used to hold a simple doubly-linked list. These are used in many parts of FreeType.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="head">head</td><td class="desc">
<p>The head (first element) of doubly-linked list.</p>
</td></tr>
<tr><td class="val" id="tail">tail</td><td class="desc">
<p>The tail (last element) of doubly-linked list.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_ListNodeRec">FT_ListNodeRec</h3>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_ListNodeRec_
{
<a href="ft2-list_processing.html#FT_ListNode">FT_ListNode</a> prev;
<a href="ft2-list_processing.html#FT_ListNode">FT_ListNode</a> next;
<span class="keyword">void</span>* data;
} <b>FT_ListNodeRec</b>;
</pre>
<p>A structure used to hold a single list element.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="prev">prev</td><td class="desc">
<p>The previous element in the list. NULL if first.</p>
</td></tr>
<tr><td class="val" id="next">next</td><td class="desc">
<p>The next element in the list. NULL if last.</p>
</td></tr>
<tr><td class="val" id="data">data</td><td class="desc">
<p>A typeless pointer to the listed object.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_List_Add">FT_List_Add</h3>
<p>Defined in FT_LIST_H (freetype/ftlist.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_List_Add</b>( <a href="ft2-list_processing.html#FT_List">FT_List</a> list,
<a href="ft2-list_processing.html#FT_ListNode">FT_ListNode</a> node );
</pre>
<p>Append an element to the end of a list.</p>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="list">list</td><td class="desc">
<p>A pointer to the parent list.</p>
</td></tr>
<tr><td class="val" id="node">node</td><td class="desc">
<p>The node to append.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_List_Insert">FT_List_Insert</h3>
<p>Defined in FT_LIST_H (freetype/ftlist.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_List_Insert</b>( <a href="ft2-list_processing.html#FT_List">FT_List</a> list,
<a href="ft2-list_processing.html#FT_ListNode">FT_ListNode</a> node );
</pre>
<p>Insert an element at the head of a list.</p>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="list">list</td><td class="desc">
<p>A pointer to parent list.</p>
</td></tr>
<tr><td class="val" id="node">node</td><td class="desc">
<p>The node to insert.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_List_Find">FT_List_Find</h3>
<p>Defined in FT_LIST_H (freetype/ftlist.h).</p>
<pre>
FT_EXPORT( <a href="ft2-list_processing.html#FT_ListNode">FT_ListNode</a> )
<b>FT_List_Find</b>( <a href="ft2-list_processing.html#FT_List">FT_List</a> list,
<span class="keyword">void</span>* data );
</pre>
<p>Find the list node for a given listed object.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="list">list</td><td class="desc">
<p>A pointer to the parent list.</p>
</td></tr>
<tr><td class="val" id="data">data</td><td class="desc">
<p>The address of the listed object.</p>
</td></tr>
</table>
<h4>return</h4>
<p>List node. NULL if it wasn't found.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_List_Remove">FT_List_Remove</h3>
<p>Defined in FT_LIST_H (freetype/ftlist.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_List_Remove</b>( <a href="ft2-list_processing.html#FT_List">FT_List</a> list,
<a href="ft2-list_processing.html#FT_ListNode">FT_ListNode</a> node );
</pre>
<p>Remove a node from a list. This function doesn't check whether the node is in the list!</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="node">node</td><td class="desc">
<p>The node to remove.</p>
</td></tr>
</table>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="list">list</td><td class="desc">
<p>A pointer to the parent list.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_List_Up">FT_List_Up</h3>
<p>Defined in FT_LIST_H (freetype/ftlist.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_List_Up</b>( <a href="ft2-list_processing.html#FT_List">FT_List</a> list,
<a href="ft2-list_processing.html#FT_ListNode">FT_ListNode</a> node );
</pre>
<p>Move a node to the head/top of a list. Used to maintain LRU lists.</p>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="list">list</td><td class="desc">
<p>A pointer to the parent list.</p>
</td></tr>
<tr><td class="val" id="node">node</td><td class="desc">
<p>The node to move.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_List_Iterate">FT_List_Iterate</h3>
<p>Defined in FT_LIST_H (freetype/ftlist.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_List_Iterate</b>( <a href="ft2-list_processing.html#FT_List">FT_List</a> list,
<a href="ft2-list_processing.html#FT_List_Iterator">FT_List_Iterator</a> iterator,
<span class="keyword">void</span>* user );
</pre>
<p>Parse a list and calls a given iterator function on each element. Note that parsing is stopped as soon as one of the iterator calls returns a non-zero value.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="list">list</td><td class="desc">
<p>A handle to the list.</p>
</td></tr>
<tr><td class="val" id="iterator">iterator</td><td class="desc">
<p>An iterator function, called on each node of the list.</p>
</td></tr>
<tr><td class="val" id="user">user</td><td class="desc">
<p>A user-supplied field that is passed as the second argument to the iterator.</p>
</td></tr>
</table>
<h4>return</h4>
<p>The result (a FreeType error code) of the last iterator call.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_List_Iterator">FT_List_Iterator</h3>
<p>Defined in FT_LIST_H (freetype/ftlist.h).</p>
<pre>
<span class="keyword">typedef</span> <a href="ft2-basic_types.html#FT_Error">FT_Error</a>
(*<b>FT_List_Iterator</b>)( <a href="ft2-list_processing.html#FT_ListNode">FT_ListNode</a> node,
<span class="keyword">void</span>* user );
</pre>
<p>An FT_List iterator function that is called during a list parse by <a href="ft2-list_processing.html#FT_List_Iterate">FT_List_Iterate</a>.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="node">node</td><td class="desc">
<p>The current iteration list node.</p>
</td></tr>
<tr><td class="val" id="user">user</td><td class="desc">
<p>A typeless pointer passed to <a href="ft2-list_processing.html#FT_List_Iterate">FT_List_Iterate</a>. Can be used to point to the iteration's state.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_List_Finalize">FT_List_Finalize</h3>
<p>Defined in FT_LIST_H (freetype/ftlist.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_List_Finalize</b>( <a href="ft2-list_processing.html#FT_List">FT_List</a> list,
<a href="ft2-list_processing.html#FT_List_Destructor">FT_List_Destructor</a> destroy,
<a href="ft2-system_interface.html#FT_Memory">FT_Memory</a> memory,
<span class="keyword">void</span>* user );
</pre>
<p>Destroy all elements in the list as well as the list itself.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="list">list</td><td class="desc">
<p>A handle to the list.</p>
</td></tr>
<tr><td class="val" id="destroy">destroy</td><td class="desc">
<p>A list destructor that will be applied to each element of the list. Set this to NULL if not needed.</p>
</td></tr>
<tr><td class="val" id="memory">memory</td><td class="desc">
<p>The current memory object that handles deallocation.</p>
</td></tr>
<tr><td class="val" id="user">user</td><td class="desc">
<p>A user-supplied field that is passed as the last argument to the destructor.</p>
</td></tr>
</table>
<h4>note</h4>
<p>This function expects that all nodes added by <a href="ft2-list_processing.html#FT_List_Add">FT_List_Add</a> or <a href="ft2-list_processing.html#FT_List_Insert">FT_List_Insert</a> have been dynamically allocated.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_List_Destructor">FT_List_Destructor</h3>
<p>Defined in FT_LIST_H (freetype/ftlist.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">void</span>
(*<b>FT_List_Destructor</b>)( <a href="ft2-system_interface.html#FT_Memory">FT_Memory</a> memory,
<span class="keyword">void</span>* data,
<span class="keyword">void</span>* user );
</pre>
<p>An <a href="ft2-list_processing.html#FT_List">FT_List</a> iterator function that is called during a list finalization by <a href="ft2-list_processing.html#FT_List_Finalize">FT_List_Finalize</a> to destroy all elements in a given list.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="system">system</td><td class="desc">
<p>The current system object.</p>
</td></tr>
<tr><td class="val" id="data">data</td><td class="desc">
<p>The current object to destroy.</p>
</td></tr>
<tr><td class="val" id="user">user</td><td class="desc">
<p>A typeless pointer passed to <a href="ft2-list_processing.html#FT_List_Iterate">FT_List_Iterate</a>. It can be used to point to the iteration's state.</p>
</td></tr>
</table>
<hr>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="lzw">LZW Streams</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_Stream_OpenLZW">FT_Stream_OpenLZW</a></td><td></td><td></td><td></td></tr>
</table>
<p>This section contains the declaration of LZW-specific functions.</p>
<div class="section">
<h3 id="FT_Stream_OpenLZW">FT_Stream_OpenLZW</h3>
<p>Defined in FT_LZW_H (freetype/ftlzw.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Stream_OpenLZW</b>( <a href="ft2-system_interface.html#FT_Stream">FT_Stream</a> stream,
<a href="ft2-system_interface.html#FT_Stream">FT_Stream</a> source );
</pre>
<p>Open a new stream to parse LZW-compressed font files. This is mainly used to support the compressed &lsquo;*.pcf.Z&rsquo; fonts that come with XFree86.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="stream">stream</td><td class="desc">
<p>The target embedding stream.</p>
</td></tr>
<tr><td class="val" id="source">source</td><td class="desc">
<p>The source stream.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>The source stream must be opened <i>before</i> calling this function.</p>
<p>Calling the internal function &lsquo;FT_Stream_Close&rsquo; on the new stream will <b>not</b> call &lsquo;FT_Stream_Close&rsquo; on the source stream. None of the stream objects will be released to the heap.</p>
<p>The stream implementation is very basic and resets the decompression process each time seeking backwards is needed within the stream</p>
<p>In certain builds of the library, LZW compression recognition is automatically handled when calling <a href="ft2-base_interface.html#FT_New_Face">FT_New_Face</a> or <a href="ft2-base_interface.html#FT_Open_Face">FT_Open_Face</a>. This means that if no font driver is capable of handling the raw compressed file, the library will try to open a LZW stream from it and re-open the face with it.</p>
<p>This function may return &lsquo;FT_Err_Unimplemented_Feature&rsquo; if your build of FreeType was not compiled with LZW support.</p>
<hr>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="mac_specific">Mac Specific Interface</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_New_Face_From_FOND">FT_New_Face_From_FOND</a></td><td><a href="#FT_GetFilePath_From_Mac_ATS_Name">FT_GetFilePath_From_Mac_ATS_Name</a></td></tr>
<tr><td><a href="#FT_GetFile_From_Mac_Name">FT_GetFile_From_Mac_Name</a></td><td><a href="#FT_New_Face_From_FSSpec">FT_New_Face_From_FSSpec</a></td></tr>
<tr><td><a href="#FT_GetFile_From_Mac_ATS_Name">FT_GetFile_From_Mac_ATS_Name</a></td><td><a href="#FT_New_Face_From_FSRef">FT_New_Face_From_FSRef</a></td></tr>
</table>
<p>The following definitions are only available if FreeType is compiled on a Macintosh.</p>
<div class="section">
<h3 id="FT_New_Face_From_FOND">FT_New_Face_From_FOND</h3>
<p>Defined in FT_MAC_H (freetype/ftmac.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_New_Face_From_FOND</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library,
Handle fond,
<a href="ft2-basic_types.html#FT_Long">FT_Long</a> face_index,
<a href="ft2-base_interface.html#FT_Face">FT_Face</a> *aface )
FT_DEPRECATED_ATTRIBUTE;
</pre>
<p>Create a new face object from a FOND resource.</p>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="library">library</td><td class="desc">
<p>A handle to the library resource.</p>
</td></tr>
</table>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="fond">fond</td><td class="desc">
<p>A FOND resource.</p>
</td></tr>
<tr><td class="val" id="face_index">face_index</td><td class="desc">
<p>Only supported for the -1 &lsquo;sanity check&rsquo; special case.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="aface">aface</td><td class="desc">
<p>A handle to a new face object.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>notes</h4>
<p>This function can be used to create <a href="ft2-base_interface.html#FT_Face">FT_Face</a> objects from fonts that are installed in the system as follows.</p>
<pre class="colored">
fond = GetResource( 'FOND', fontName );
error = FT_New_Face_From_FOND( library, fond, 0, &amp;face );
</pre>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_GetFile_From_Mac_Name">FT_GetFile_From_Mac_Name</h3>
<p>Defined in FT_MAC_H (freetype/ftmac.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_GetFile_From_Mac_Name</b>( <span class="keyword">const</span> <span class="keyword">char</span>* fontName,
FSSpec* pathSpec,
<a href="ft2-basic_types.html#FT_Long">FT_Long</a>* face_index )
FT_DEPRECATED_ATTRIBUTE;
</pre>
<p>Return an FSSpec for the disk file containing the named font.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="fontName">fontName</td><td class="desc">
<p>Mac OS name of the font (e.g., Times New Roman Bold).</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="pathSpec">pathSpec</td><td class="desc">
<p>FSSpec to the file. For passing to <a href="ft2-mac_specific.html#FT_New_Face_From_FSSpec">FT_New_Face_From_FSSpec</a>.</p>
</td></tr>
<tr><td class="val" id="face_index">face_index</td><td class="desc">
<p>Index of the face. For passing to <a href="ft2-mac_specific.html#FT_New_Face_From_FSSpec">FT_New_Face_From_FSSpec</a>.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_GetFile_From_Mac_ATS_Name">FT_GetFile_From_Mac_ATS_Name</h3>
<p>Defined in FT_MAC_H (freetype/ftmac.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_GetFile_From_Mac_ATS_Name</b>( <span class="keyword">const</span> <span class="keyword">char</span>* fontName,
FSSpec* pathSpec,
<a href="ft2-basic_types.html#FT_Long">FT_Long</a>* face_index )
FT_DEPRECATED_ATTRIBUTE;
</pre>
<p>Return an FSSpec for the disk file containing the named font.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="fontName">fontName</td><td class="desc">
<p>Mac OS name of the font in ATS framework.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="pathSpec">pathSpec</td><td class="desc">
<p>FSSpec to the file. For passing to <a href="ft2-mac_specific.html#FT_New_Face_From_FSSpec">FT_New_Face_From_FSSpec</a>.</p>
</td></tr>
<tr><td class="val" id="face_index">face_index</td><td class="desc">
<p>Index of the face. For passing to <a href="ft2-mac_specific.html#FT_New_Face_From_FSSpec">FT_New_Face_From_FSSpec</a>.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_GetFilePath_From_Mac_ATS_Name">FT_GetFilePath_From_Mac_ATS_Name</h3>
<p>Defined in FT_MAC_H (freetype/ftmac.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_GetFilePath_From_Mac_ATS_Name</b>( <span class="keyword">const</span> <span class="keyword">char</span>* fontName,
UInt8* path,
UInt32 maxPathSize,
<a href="ft2-basic_types.html#FT_Long">FT_Long</a>* face_index )
FT_DEPRECATED_ATTRIBUTE;
</pre>
<p>Return a pathname of the disk file and face index for given font name that is handled by ATS framework.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="fontName">fontName</td><td class="desc">
<p>Mac OS name of the font in ATS framework.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="path">path</td><td class="desc">
<p>Buffer to store pathname of the file. For passing to <a href="ft2-base_interface.html#FT_New_Face">FT_New_Face</a>. The client must allocate this buffer before calling this function.</p>
</td></tr>
<tr><td class="val" id="maxPathSize">maxPathSize</td><td class="desc">
<p>Lengths of the buffer &lsquo;path&rsquo; that client allocated.</p>
</td></tr>
<tr><td class="val" id="face_index">face_index</td><td class="desc">
<p>Index of the face. For passing to <a href="ft2-base_interface.html#FT_New_Face">FT_New_Face</a>.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_New_Face_From_FSSpec">FT_New_Face_From_FSSpec</h3>
<p>Defined in FT_MAC_H (freetype/ftmac.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_New_Face_From_FSSpec</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library,
<span class="keyword">const</span> FSSpec *spec,
<a href="ft2-basic_types.html#FT_Long">FT_Long</a> face_index,
<a href="ft2-base_interface.html#FT_Face">FT_Face</a> *aface )
FT_DEPRECATED_ATTRIBUTE;
</pre>
<p>Create a new face object from a given resource and typeface index using an FSSpec to the font file.</p>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="library">library</td><td class="desc">
<p>A handle to the library resource.</p>
</td></tr>
</table>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="spec">spec</td><td class="desc">
<p>FSSpec to the font file.</p>
</td></tr>
<tr><td class="val" id="face_index">face_index</td><td class="desc">
<p>The index of the face within the resource. The first face has index&nbsp;0.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="aface">aface</td><td class="desc">
<p>A handle to a new face object.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p><a href="ft2-mac_specific.html#FT_New_Face_From_FSSpec">FT_New_Face_From_FSSpec</a> is identical to <a href="ft2-base_interface.html#FT_New_Face">FT_New_Face</a> except it accepts an FSSpec instead of a path.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_New_Face_From_FSRef">FT_New_Face_From_FSRef</h3>
<p>Defined in FT_MAC_H (freetype/ftmac.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_New_Face_From_FSRef</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library,
<span class="keyword">const</span> FSRef *ref,
<a href="ft2-basic_types.html#FT_Long">FT_Long</a> face_index,
<a href="ft2-base_interface.html#FT_Face">FT_Face</a> *aface )
FT_DEPRECATED_ATTRIBUTE;
</pre>
<p>Create a new face object from a given resource and typeface index using an FSRef to the font file.</p>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="library">library</td><td class="desc">
<p>A handle to the library resource.</p>
</td></tr>
</table>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="spec">spec</td><td class="desc">
<p>FSRef to the font file.</p>
</td></tr>
<tr><td class="val" id="face_index">face_index</td><td class="desc">
<p>The index of the face within the resource. The first face has index&nbsp;0.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="aface">aface</td><td class="desc">
<p>A handle to a new face object.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p><a href="ft2-mac_specific.html#FT_New_Face_From_FSRef">FT_New_Face_From_FSRef</a> is identical to <a href="ft2-base_interface.html#FT_New_Face">FT_New_Face</a> except it accepts an FSRef instead of a path.</p>
<hr>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="module_management">Module Management</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_Module">FT_Module</a></td><td>&nbsp;</td></tr>
<tr><td><a href="#FT_Module_Constructor">FT_Module_Constructor</a></td><td><a href="#FT_New_Library">FT_New_Library</a></td></tr>
<tr><td><a href="#FT_Module_Destructor">FT_Module_Destructor</a></td><td><a href="#FT_Done_Library">FT_Done_Library</a></td></tr>
<tr><td><a href="#FT_Module_Requester">FT_Module_Requester</a></td><td><a href="#FT_Reference_Library">FT_Reference_Library</a></td></tr>
<tr><td><a href="#FT_Module_Class">FT_Module_Class</a></td><td>&nbsp;</td></tr>
<tr><td>&nbsp;</td><td><a href="#FT_Renderer">FT_Renderer</a></td></tr>
<tr><td><a href="#FT_Add_Module">FT_Add_Module</a></td><td><a href="#FT_Renderer_Class">FT_Renderer_Class</a></td></tr>
<tr><td><a href="#FT_Get_Module">FT_Get_Module</a></td><td>&nbsp;</td></tr>
<tr><td><a href="#FT_Remove_Module">FT_Remove_Module</a></td><td><a href="#FT_Get_Renderer">FT_Get_Renderer</a></td></tr>
<tr><td><a href="#FT_Add_Default_Modules">FT_Add_Default_Modules</a></td><td><a href="#FT_Set_Renderer">FT_Set_Renderer</a></td></tr>
<tr><td>&nbsp;</td><td>&nbsp;</td></tr>
<tr><td><a href="#FT_Property_Set">FT_Property_Set</a></td><td><a href="#FT_Set_Debug_Hook">FT_Set_Debug_Hook</a></td></tr>
<tr><td><a href="#FT_Property_Get">FT_Property_Get</a></td><td>&nbsp;</td></tr>
<tr><td><a href="#FT_Set_Default_Properties">FT_Set_Default_Properties</a></td><td><a href="#FT_Driver">FT_Driver</a></td></tr>
</table>
<p>The definitions below are used to manage modules within FreeType. Modules can be added, upgraded, and removed at runtime. Additionally, some module properties can be controlled also.</p>
<p>Here is a list of possible values of the &lsquo;module_name&rsquo; field in the <a href="ft2-module_management.html#FT_Module_Class">FT_Module_Class</a> structure.</p>
<pre class="colored">
autofitter
bdf
cff
gxvalid
otvalid
pcf
pfr
psaux
pshinter
psnames
raster1
sfnt
smooth, smooth-lcd, smooth-lcdv
truetype
type1
type42
t1cid
winfonts
</pre>
<p>Note that the FreeType Cache sub-system is not a FreeType module.</p>
<div class="section">
<h3 id="FT_Module">FT_Module</h3>
<p>Defined in FT_FREETYPE_H (freetype/freetype.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_ModuleRec_* <b>FT_Module</b>;
</pre>
<p>A handle to a given FreeType module object. A module can be a font driver, a renderer, or anything else that provides services to the former.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Module_Constructor">FT_Module_Constructor</h3>
<p>Defined in FT_MODULE_H (freetype/ftmodapi.h).</p>
<pre>
<span class="keyword">typedef</span> <a href="ft2-basic_types.html#FT_Error">FT_Error</a>
(*<b>FT_Module_Constructor</b>)( <a href="ft2-module_management.html#FT_Module">FT_Module</a> module );
</pre>
<p>A function used to initialize (not create) a new module object.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="module">module</td><td class="desc">
<p>The module to initialize.</p>
</td></tr>
</table>
<hr>
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<div class="section">
<h3 id="FT_Module_Destructor">FT_Module_Destructor</h3>
<p>Defined in FT_MODULE_H (freetype/ftmodapi.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">void</span>
(*<b>FT_Module_Destructor</b>)( <a href="ft2-module_management.html#FT_Module">FT_Module</a> module );
</pre>
<p>A function used to finalize (not destroy) a given module object.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="module">module</td><td class="desc">
<p>The module to finalize.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Module_Requester">FT_Module_Requester</h3>
<p>Defined in FT_MODULE_H (freetype/ftmodapi.h).</p>
<pre>
<span class="keyword">typedef</span> FT_Module_Interface
(*<b>FT_Module_Requester</b>)( <a href="ft2-module_management.html#FT_Module">FT_Module</a> module,
<span class="keyword">const</span> <span class="keyword">char</span>* name );
</pre>
<p>A function used to query a given module for a specific interface.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="module">module</td><td class="desc">
<p>The module to be searched.</p>
</td></tr>
<tr><td class="val" id="name">name</td><td class="desc">
<p>The name of the interface in the module.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Module_Class">FT_Module_Class</h3>
<p>Defined in FT_MODULE_H (freetype/ftmodapi.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Module_Class_
{
<a href="ft2-basic_types.html#FT_ULong">FT_ULong</a> module_flags;
<a href="ft2-basic_types.html#FT_Long">FT_Long</a> module_size;
<span class="keyword">const</span> <a href="ft2-basic_types.html#FT_String">FT_String</a>* module_name;
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> module_version;
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> module_requires;
<span class="keyword">const</span> <span class="keyword">void</span>* module_interface;
<a href="ft2-module_management.html#FT_Module_Constructor">FT_Module_Constructor</a> module_init;
<a href="ft2-module_management.html#FT_Module_Destructor">FT_Module_Destructor</a> module_done;
<a href="ft2-module_management.html#FT_Module_Requester">FT_Module_Requester</a> get_interface;
} <b>FT_Module_Class</b>;
</pre>
<p>The module class descriptor.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="module_flags">module_flags</td><td class="desc">
<p>Bit flags describing the module.</p>
</td></tr>
<tr><td class="val" id="module_size">module_size</td><td class="desc">
<p>The size of one module object/instance in bytes.</p>
</td></tr>
<tr><td class="val" id="module_name">module_name</td><td class="desc">
<p>The name of the module.</p>
</td></tr>
<tr><td class="val" id="module_version">module_version</td><td class="desc">
<p>The version, as a 16.16 fixed number (major.minor).</p>
</td></tr>
<tr><td class="val" id="module_requires">module_requires</td><td class="desc">
<p>The version of FreeType this module requires, as a 16.16 fixed number (major.minor). Starts at version 2.0, i.e., 0x20000.</p>
</td></tr>
<tr><td class="val" id="module_init">module_init</td><td class="desc">
<p>The initializing function.</p>
</td></tr>
<tr><td class="val" id="module_done">module_done</td><td class="desc">
<p>The finalizing function.</p>
</td></tr>
<tr><td class="val" id="get_interface">get_interface</td><td class="desc">
<p>The interface requesting function.</p>
</td></tr>
</table>
<hr>
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<div class="section">
<h3 id="FT_Add_Module">FT_Add_Module</h3>
<p>Defined in FT_MODULE_H (freetype/ftmodapi.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Add_Module</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library,
<span class="keyword">const</span> <a href="ft2-module_management.html#FT_Module_Class">FT_Module_Class</a>* clazz );
</pre>
<p>Add a new module to a given library instance.</p>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="library">library</td><td class="desc">
<p>A handle to the library object.</p>
</td></tr>
</table>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="clazz">clazz</td><td class="desc">
<p>A pointer to class descriptor for the module.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>An error will be returned if a module already exists by that name, or if the module requires a version of FreeType that is too great.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Get_Module">FT_Get_Module</h3>
<p>Defined in FT_MODULE_H (freetype/ftmodapi.h).</p>
<pre>
FT_EXPORT( <a href="ft2-module_management.html#FT_Module">FT_Module</a> )
<b>FT_Get_Module</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library,
<span class="keyword">const</span> <span class="keyword">char</span>* module_name );
</pre>
<p>Find a module by its name.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="library">library</td><td class="desc">
<p>A handle to the library object.</p>
</td></tr>
<tr><td class="val" id="module_name">module_name</td><td class="desc">
<p>The module's name (as an ASCII string).</p>
</td></tr>
</table>
<h4>return</h4>
<p>A module handle. 0&nbsp;if none was found.</p>
<h4>note</h4>
<p>FreeType's internal modules aren't documented very well, and you should look up the source code for details.</p>
<hr>
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<div class="section">
<h3 id="FT_Remove_Module">FT_Remove_Module</h3>
<p>Defined in FT_MODULE_H (freetype/ftmodapi.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Remove_Module</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library,
<a href="ft2-module_management.html#FT_Module">FT_Module</a> module );
</pre>
<p>Remove a given module from a library instance.</p>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="library">library</td><td class="desc">
<p>A handle to a library object.</p>
</td></tr>
</table>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="module">module</td><td class="desc">
<p>A handle to a module object.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>The module object is destroyed by the function in case of success.</p>
<hr>
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<div class="section">
<h3 id="FT_Add_Default_Modules">FT_Add_Default_Modules</h3>
<p>Defined in FT_MODULE_H (freetype/ftmodapi.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_Add_Default_Modules</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library );
</pre>
<p>Add the set of default drivers to a given library object. This is only useful when you create a library object with <a href="ft2-module_management.html#FT_New_Library">FT_New_Library</a> (usually to plug a custom memory manager).</p>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="library">library</td><td class="desc">
<p>A handle to a new library object.</p>
</td></tr>
</table>
<hr>
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<div class="section">
<h3 id="FT_Property_Set">FT_Property_Set</h3>
<p>Defined in FT_MODULE_H (freetype/ftmodapi.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Property_Set</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library,
<span class="keyword">const</span> <a href="ft2-basic_types.html#FT_String">FT_String</a>* module_name,
<span class="keyword">const</span> <a href="ft2-basic_types.html#FT_String">FT_String</a>* property_name,
<span class="keyword">const</span> <span class="keyword">void</span>* value );
</pre>
<p>Set a property for a given module.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="library">library</td><td class="desc">
<p>A handle to the library the module is part of.</p>
</td></tr>
<tr><td class="val" id="module_name">module_name</td><td class="desc">
<p>The module name.</p>
</td></tr>
<tr><td class="val" id="property_name">property_name</td><td class="desc">
<p>The property name. Properties are described in the &lsquo;Synopsis&rsquo; subsection of the module's documentation.</p>
<p>Note that only a few modules have properties.</p>
</td></tr>
<tr><td class="val" id="value">value</td><td class="desc">
<p>A generic pointer to a variable or structure that gives the new value of the property. The exact definition of &lsquo;value&rsquo; is dependent on the property; see the &lsquo;Synopsis&rsquo; subsection of the module's documentation.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>If &lsquo;module_name&rsquo; isn't a valid module name, or &lsquo;property_name&rsquo; doesn't specify a valid property, or if &lsquo;value&rsquo; doesn't represent a valid value for the given property, an error is returned.</p>
<p>The following example sets property &lsquo;bar&rsquo; (a simple integer) in module &lsquo;foo&rsquo; to value&nbsp;1.</p>
<pre class="colored">
FT_UInt bar;
bar = 1;
FT_Property_Set( library, "foo", "bar", &amp;bar );
</pre>
<p>Note that the FreeType Cache sub-system doesn't recognize module property changes. To avoid glyph lookup confusion within the cache you should call <a href="ft2-cache_subsystem.html#FTC_Manager_Reset">FTC_Manager_Reset</a> to completely flush the cache if a module property gets changed after <a href="ft2-cache_subsystem.html#FTC_Manager_New">FTC_Manager_New</a> has been called.</p>
<p>It is not possible to set properties of the FreeType Cache sub-system itself with FT_Property_Set; use ?FTC_Property_Set? instead.</p>
<h4>since</h4>
<p>2.4.11</p>
<hr>
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<div class="section">
<h3 id="FT_Property_Get">FT_Property_Get</h3>
<p>Defined in FT_MODULE_H (freetype/ftmodapi.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Property_Get</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library,
<span class="keyword">const</span> <a href="ft2-basic_types.html#FT_String">FT_String</a>* module_name,
<span class="keyword">const</span> <a href="ft2-basic_types.html#FT_String">FT_String</a>* property_name,
<span class="keyword">void</span>* value );
</pre>
<p>Get a module's property value.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="library">library</td><td class="desc">
<p>A handle to the library the module is part of.</p>
</td></tr>
<tr><td class="val" id="module_name">module_name</td><td class="desc">
<p>The module name.</p>
</td></tr>
<tr><td class="val" id="property_name">property_name</td><td class="desc">
<p>The property name. Properties are described in the &lsquo;Synopsis&rsquo; subsection of the module's documentation.</p>
</td></tr>
</table>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="value">value</td><td class="desc">
<p>A generic pointer to a variable or structure that gives the value of the property. The exact definition of &lsquo;value&rsquo; is dependent on the property; see the &lsquo;Synopsis&rsquo; subsection of the module's documentation.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>If &lsquo;module_name&rsquo; isn't a valid module name, or &lsquo;property_name&rsquo; doesn't specify a valid property, or if &lsquo;value&rsquo; doesn't represent a valid value for the given property, an error is returned.</p>
<p>The following example gets property &lsquo;baz&rsquo; (a range) in module &lsquo;foo&rsquo;.</p>
<pre class="colored">
typedef range_
{
FT_Int32 min;
FT_Int32 max;
} range;
range baz;
FT_Property_Get( library, "foo", "baz", &amp;baz );
</pre>
<p>It is not possible to retrieve properties of the FreeType Cache sub-system with FT_Property_Get; use ?FTC_Property_Get? instead.</p>
<h4>since</h4>
<p>2.4.11</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Set_Default_Properties">FT_Set_Default_Properties</h3>
<p>Defined in FT_MODULE_H (freetype/ftmodapi.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_Set_Default_Properties</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library );
</pre>
<p>If compilation option FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES is set, this function reads the &lsquo;FREETYPE_PROPERTIES&rsquo; environment variable to control driver properties. See sections &lsquo;<a href="ft2-auto_hinter.html#auto_hinter">The auto-hinter</a>&rsquo;, &lsquo;<a href="ft2-cff_driver.html#cff_driver">The CFF driver</a>&rsquo;, &lsquo;<a href="ft2-pcf_driver.html#pcf_driver">The PCF driver</a>&rsquo;, and &lsquo;<a href="ft2-tt_driver.html#tt_driver">The TrueType driver</a>&rsquo; for more.</p>
<p>If the compilation option is not set, this function does nothing.</p>
<p>&lsquo;FREETYPE_PROPERTIES&rsquo; has the following syntax form (broken here into multiple lines for better readability).</p>
<pre class="colored">
&lt;optional whitespace&gt;
</pre>
<h4>module-name1</h4>
<p>':'</p>
<h4>property-name1</h4>
<p>'=' &lt;property-value1&gt;</p>
<h4>module-name2</h4>
<p>':'</p>
<h4>property-name2</h4>
<p>'=' &lt;property-value2&gt; ... }</p>
<p>Example:</p>
<pre class="colored">
FREETYPE_PROPERTIES=truetype:interpreter-version=35 \
cff:no-stem-darkening=1 \
autofitter:warping=1
</pre>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="library">library</td><td class="desc">
<p>A handle to a new library object.</p>
</td></tr>
</table>
<hr>
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<div class="section">
<h3 id="FT_New_Library">FT_New_Library</h3>
<p>Defined in FT_MODULE_H (freetype/ftmodapi.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_New_Library</b>( <a href="ft2-system_interface.html#FT_Memory">FT_Memory</a> memory,
<a href="ft2-base_interface.html#FT_Library">FT_Library</a> *alibrary );
</pre>
<p>This function is used to create a new FreeType library instance from a given memory object. It is thus possible to use libraries with distinct memory allocators within the same program. Note, however, that the used <a href="ft2-system_interface.html#FT_Memory">FT_Memory</a> structure is expected to remain valid for the life of the <a href="ft2-base_interface.html#FT_Library">FT_Library</a> object.</p>
<p>Normally, you would call this function (followed by a call to <a href="ft2-module_management.html#FT_Add_Default_Modules">FT_Add_Default_Modules</a> or a series of calls to <a href="ft2-module_management.html#FT_Add_Module">FT_Add_Module</a>, and a call to <a href="ft2-module_management.html#FT_Set_Default_Properties">FT_Set_Default_Properties</a>) instead of <a href="ft2-base_interface.html#FT_Init_FreeType">FT_Init_FreeType</a> to initialize the FreeType library.</p>
<p>Don't use <a href="ft2-base_interface.html#FT_Done_FreeType">FT_Done_FreeType</a> but <a href="ft2-module_management.html#FT_Done_Library">FT_Done_Library</a> to destroy a library instance.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="memory">memory</td><td class="desc">
<p>A handle to the original memory object.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="alibrary">alibrary</td><td class="desc">
<p>A pointer to handle of a new library object.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>See the discussion of reference counters in the description of <a href="ft2-module_management.html#FT_Reference_Library">FT_Reference_Library</a>.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Done_Library">FT_Done_Library</h3>
<p>Defined in FT_MODULE_H (freetype/ftmodapi.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Done_Library</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library );
</pre>
<p>Discard a given library object. This closes all drivers and discards all resource objects.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="library">library</td><td class="desc">
<p>A handle to the target library.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>See the discussion of reference counters in the description of <a href="ft2-module_management.html#FT_Reference_Library">FT_Reference_Library</a>.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Reference_Library">FT_Reference_Library</h3>
<p>Defined in FT_MODULE_H (freetype/ftmodapi.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Reference_Library</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library );
</pre>
<p>A counter gets initialized to&nbsp;1 at the time an <a href="ft2-base_interface.html#FT_Library">FT_Library</a> structure is created. This function increments the counter. <a href="ft2-module_management.html#FT_Done_Library">FT_Done_Library</a> then only destroys a library if the counter is&nbsp;1, otherwise it simply decrements the counter.</p>
<p>This function helps in managing life-cycles of structures that reference <a href="ft2-base_interface.html#FT_Library">FT_Library</a> objects.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="library">library</td><td class="desc">
<p>A handle to a target library object.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>since</h4>
<p>2.4.2</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Renderer">FT_Renderer</h3>
<p>Defined in FT_FREETYPE_H (freetype/freetype.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_RendererRec_* <b>FT_Renderer</b>;
</pre>
<p>A handle to a given FreeType renderer. A renderer is a module in charge of converting a glyph's outline image to a bitmap. It supports a single glyph image format, and one or more target surface depths.</p>
<hr>
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<div class="section">
<h3 id="FT_Renderer_Class">FT_Renderer_Class</h3>
<p>Defined in FT_RENDER_H (freetype/ftrender.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Renderer_Class_
{
<a href="ft2-module_management.html#FT_Module_Class">FT_Module_Class</a> root;
<a href="ft2-basic_types.html#FT_Glyph_Format">FT_Glyph_Format</a> glyph_format;
FT_Renderer_RenderFunc render_glyph;
FT_Renderer_TransformFunc transform_glyph;
FT_Renderer_GetCBoxFunc get_glyph_cbox;
FT_Renderer_SetModeFunc set_mode;
<a href="ft2-raster.html#FT_Raster_Funcs">FT_Raster_Funcs</a>* raster_class;
} <b>FT_Renderer_Class</b>;
</pre>
<p>The renderer module class descriptor.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="root">root</td><td class="desc">
<p>The root <a href="ft2-module_management.html#FT_Module_Class">FT_Module_Class</a> fields.</p>
</td></tr>
<tr><td class="val" id="glyph_format">glyph_format</td><td class="desc">
<p>The glyph image format this renderer handles.</p>
</td></tr>
<tr><td class="val" id="render_glyph">render_glyph</td><td class="desc">
<p>A method used to render the image that is in a given glyph slot into a bitmap.</p>
</td></tr>
<tr><td class="val" id="transform_glyph">transform_glyph</td><td class="desc">
<p>A method used to transform the image that is in a given glyph slot.</p>
</td></tr>
<tr><td class="val" id="get_glyph_cbox">get_glyph_cbox</td><td class="desc">
<p>A method used to access the glyph's cbox.</p>
</td></tr>
<tr><td class="val" id="set_mode">set_mode</td><td class="desc">
<p>A method used to pass additional parameters.</p>
</td></tr>
<tr><td class="val" id="raster_class">raster_class</td><td class="desc">
<p>For <a href="ft2-basic_types.html#FT_Glyph_Format">FT_GLYPH_FORMAT_OUTLINE</a> renderers only. This is a pointer to its raster's class.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Get_Renderer">FT_Get_Renderer</h3>
<p>Defined in FT_RENDER_H (freetype/ftrender.h).</p>
<pre>
FT_EXPORT( <a href="ft2-module_management.html#FT_Renderer">FT_Renderer</a> )
<b>FT_Get_Renderer</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library,
<a href="ft2-basic_types.html#FT_Glyph_Format">FT_Glyph_Format</a> format );
</pre>
<p>Retrieve the current renderer for a given glyph format.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="library">library</td><td class="desc">
<p>A handle to the library object.</p>
</td></tr>
<tr><td class="val" id="format">format</td><td class="desc">
<p>The glyph format.</p>
</td></tr>
</table>
<h4>return</h4>
<p>A renderer handle. 0&nbsp;if none found.</p>
<h4>note</h4>
<p>An error will be returned if a module already exists by that name, or if the module requires a version of FreeType that is too great.</p>
<p>To add a new renderer, simply use <a href="ft2-module_management.html#FT_Add_Module">FT_Add_Module</a>. To retrieve a renderer by its name, use <a href="ft2-module_management.html#FT_Get_Module">FT_Get_Module</a>.</p>
<hr>
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<div class="section">
<h3 id="FT_Set_Renderer">FT_Set_Renderer</h3>
<p>Defined in FT_RENDER_H (freetype/ftrender.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Set_Renderer</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library,
<a href="ft2-module_management.html#FT_Renderer">FT_Renderer</a> renderer,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> num_params,
<a href="ft2-base_interface.html#FT_Parameter">FT_Parameter</a>* parameters );
</pre>
<p>Set the current renderer to use, and set additional mode.</p>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="library">library</td><td class="desc">
<p>A handle to the library object.</p>
</td></tr>
</table>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="renderer">renderer</td><td class="desc">
<p>A handle to the renderer object.</p>
</td></tr>
<tr><td class="val" id="num_params">num_params</td><td class="desc">
<p>The number of additional parameters.</p>
</td></tr>
<tr><td class="val" id="parameters">parameters</td><td class="desc">
<p>Additional parameters.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>In case of success, the renderer will be used to convert glyph images in the renderer's known format into bitmaps.</p>
<p>This doesn't change the current renderer for other formats.</p>
<p>Currently, no FreeType renderer module uses &lsquo;parameters&rsquo;; you should thus always pass NULL as the value.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Set_Debug_Hook">FT_Set_Debug_Hook</h3>
<p>Defined in FT_MODULE_H (freetype/ftmodapi.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_Set_Debug_Hook</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> hook_index,
FT_DebugHook_Func debug_hook );
</pre>
<p>Set a debug hook function for debugging the interpreter of a font format.</p>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="library">library</td><td class="desc">
<p>A handle to the library object.</p>
</td></tr>
</table>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="hook_index">hook_index</td><td class="desc">
<p>The index of the debug hook. You should use the values defined in &lsquo;ftobjs.h&rsquo;, e.g., &lsquo;FT_DEBUG_HOOK_TRUETYPE&rsquo;.</p>
</td></tr>
<tr><td class="val" id="debug_hook">debug_hook</td><td class="desc">
<p>The function used to debug the interpreter.</p>
</td></tr>
</table>
<h4>note</h4>
<p>Currently, four debug hook slots are available, but only two (for the TrueType and the Type&nbsp;1 interpreter) are defined.</p>
<p>Since the internal headers of FreeType are no longer installed, the symbol &lsquo;FT_DEBUG_HOOK_TRUETYPE&rsquo; isn't available publicly. This is a bug and will be fixed in a forthcoming release.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Driver">FT_Driver</h3>
<p>Defined in FT_FREETYPE_H (freetype/freetype.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_DriverRec_* <b>FT_Driver</b>;
</pre>
<p>A handle to a given FreeType font driver object. A font driver is a module capable of creating faces from font files.</p>
<hr>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="multiple_masters">Multiple Masters</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_MM_Axis">FT_MM_Axis</a></td><td><a href="#FT_Set_Var_Design_Coordinates">FT_Set_Var_Design_Coordinates</a></td></tr>
<tr><td><a href="#FT_Multi_Master">FT_Multi_Master</a></td><td><a href="#FT_Get_Var_Design_Coordinates">FT_Get_Var_Design_Coordinates</a></td></tr>
<tr><td><a href="#FT_Var_Axis">FT_Var_Axis</a></td><td><a href="#FT_Set_MM_Blend_Coordinates">FT_Set_MM_Blend_Coordinates</a></td></tr>
<tr><td><a href="#FT_Var_Named_Style">FT_Var_Named_Style</a></td><td><a href="#FT_Get_MM_Blend_Coordinates">FT_Get_MM_Blend_Coordinates</a></td></tr>
<tr><td><a href="#FT_MM_Var">FT_MM_Var</a></td><td><a href="#FT_Set_Var_Blend_Coordinates">FT_Set_Var_Blend_Coordinates</a></td></tr>
<tr><td><a href="#FT_Get_Multi_Master">FT_Get_Multi_Master</a></td><td><a href="#FT_Get_Var_Blend_Coordinates">FT_Get_Var_Blend_Coordinates</a></td></tr>
<tr><td><a href="#FT_Get_MM_Var">FT_Get_MM_Var</a></td><td><a href="#FT_VAR_AXIS_FLAG_XXX">FT_VAR_AXIS_FLAG_XXX</a></td></tr>
<tr><td><a href="#FT_Set_MM_Design_Coordinates">FT_Set_MM_Design_Coordinates</a></td><td><a href="#FT_Get_Var_Axis_Flags">FT_Get_Var_Axis_Flags</a></td></tr>
</table>
<p>The following types and functions are used to manage Multiple Master fonts, i.e., the selection of specific design instances by setting design axis coordinates.</p>
<p>Besides Adobe MM fonts, the interface supports Apple's TrueType GX and OpenType variation fonts. Some of the routines only work with Adobe MM fonts, others will work with all three types. They are similar enough that a consistent interface makes sense.</p>
<div class="section">
<h3 id="FT_MM_Axis">FT_MM_Axis</h3>
<p>Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_MM_Axis_
{
<a href="ft2-basic_types.html#FT_String">FT_String</a>* name;
<a href="ft2-basic_types.html#FT_Long">FT_Long</a> minimum;
<a href="ft2-basic_types.html#FT_Long">FT_Long</a> maximum;
} <b>FT_MM_Axis</b>;
</pre>
<p>A structure to model a given axis in design space for Multiple Masters fonts.</p>
<p>This structure can't be used for TrueType GX or OpenType variation fonts.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="name">name</td><td class="desc">
<p>The axis's name.</p>
</td></tr>
<tr><td class="val" id="minimum">minimum</td><td class="desc">
<p>The axis's minimum design coordinate.</p>
</td></tr>
<tr><td class="val" id="maximum">maximum</td><td class="desc">
<p>The axis's maximum design coordinate.</p>
</td></tr>
</table>
<hr>
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<div class="section">
<h3 id="FT_Multi_Master">FT_Multi_Master</h3>
<p>Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Multi_Master_
{
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> num_axis;
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> num_designs;
<a href="ft2-multiple_masters.html#FT_MM_Axis">FT_MM_Axis</a> axis[T1_MAX_MM_AXIS];
} <b>FT_Multi_Master</b>;
</pre>
<p>A structure to model the axes and space of a Multiple Masters font.</p>
<p>This structure can't be used for TrueType GX or OpenType variation fonts.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="num_axis">num_axis</td><td class="desc">
<p>Number of axes. Cannot exceed&nbsp;4.</p>
</td></tr>
<tr><td class="val" id="num_designs">num_designs</td><td class="desc">
<p>Number of designs; should be normally 2^num_axis even though the Type&nbsp;1 specification strangely allows for intermediate designs to be present. This number cannot exceed&nbsp;16.</p>
</td></tr>
<tr><td class="val" id="axis">axis</td><td class="desc">
<p>A table of axis descriptors.</p>
</td></tr>
</table>
<hr>
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<div class="section">
<h3 id="FT_Var_Axis">FT_Var_Axis</h3>
<p>Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Var_Axis_
{
<a href="ft2-basic_types.html#FT_String">FT_String</a>* name;
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> minimum;
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> def;
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> maximum;
<a href="ft2-basic_types.html#FT_ULong">FT_ULong</a> tag;
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> strid;
} <b>FT_Var_Axis</b>;
</pre>
<p>A structure to model a given axis in design space for Multiple Masters, TrueType GX, and OpenType variation fonts.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="name">name</td><td class="desc">
<p>The axis's name. Not always meaningful for TrueType GX or OpenType variation fonts.</p>
</td></tr>
<tr><td class="val" id="minimum">minimum</td><td class="desc">
<p>The axis's minimum design coordinate.</p>
</td></tr>
<tr><td class="val" id="def">def</td><td class="desc">
<p>The axis's default design coordinate. FreeType computes meaningful default values for Adobe MM fonts.</p>
</td></tr>
<tr><td class="val" id="maximum">maximum</td><td class="desc">
<p>The axis's maximum design coordinate.</p>
</td></tr>
<tr><td class="val" id="tag">tag</td><td class="desc">
<p>The axis's tag (the equivalent to &lsquo;name&rsquo; for TrueType GX and OpenType variation fonts). FreeType provides default values for Adobe MM fonts if possible.</p>
</td></tr>
<tr><td class="val" id="strid">strid</td><td class="desc">
<p>The axis name entry in the font's &lsquo;name&rsquo; table. This is another (and often better) version of the &lsquo;name&rsquo; field for TrueType GX or OpenType variation fonts. Not meaningful for Adobe MM fonts.</p>
</td></tr>
</table>
<h4>note</h4>
<p>The fields &lsquo;minimum&rsquo;, &lsquo;def&rsquo;, and &lsquo;maximum&rsquo; are 16.16 fractional values for TrueType GX and OpenType variation fonts. For Adobe MM fonts, the values are integers.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Var_Named_Style">FT_Var_Named_Style</h3>
<p>Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Var_Named_Style_
{
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a>* coords;
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> strid;
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> psid; /* since 2.7.1 */
} <b>FT_Var_Named_Style</b>;
</pre>
<p>A structure to model a named instance in a TrueType GX or OpenType variation font.</p>
<p>This structure can't be used for Adobe MM fonts.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="coords">coords</td><td class="desc">
<p>The design coordinates for this instance. This is an array with one entry for each axis.</p>
</td></tr>
<tr><td class="val" id="strid">strid</td><td class="desc">
<p>The entry in &lsquo;name&rsquo; table identifying this instance.</p>
</td></tr>
<tr><td class="val" id="psid">psid</td><td class="desc">
<p>The entry in &lsquo;name&rsquo; table identifying a PostScript name for this instance. Value 0xFFFF indicates a missing entry.</p>
</td></tr>
</table>
<hr>
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<div class="section">
<h3 id="FT_MM_Var">FT_MM_Var</h3>
<p>Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_MM_Var_
{
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> num_axis;
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> num_designs;
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> num_namedstyles;
<a href="ft2-multiple_masters.html#FT_Var_Axis">FT_Var_Axis</a>* axis;
<a href="ft2-multiple_masters.html#FT_Var_Named_Style">FT_Var_Named_Style</a>* namedstyle;
} <b>FT_MM_Var</b>;
</pre>
<p>A structure to model the axes and space of an Adobe MM, TrueType GX, or OpenType variation font.</p>
<p>Some fields are specific to one format and not to the others.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="num_axis">num_axis</td><td class="desc">
<p>The number of axes. The maximum value is&nbsp;4 for Adobe MM fonts; no limit in TrueType GX or OpenType variation fonts.</p>
</td></tr>
<tr><td class="val" id="num_designs">num_designs</td><td class="desc">
<p>The number of designs; should be normally 2^num_axis for Adobe MM fonts. Not meaningful for TrueType GX or OpenType variation fonts (where every glyph could have a different number of designs).</p>
</td></tr>
<tr><td class="val" id="num_namedstyles">num_namedstyles</td><td class="desc">
<p>The number of named styles; a &lsquo;named style&rsquo; is a tuple of design coordinates that has a string ID (in the &lsquo;name&rsquo; table) associated with it. The font can tell the user that, for example, [Weight=1.5,Width=1.1] is &lsquo;Bold&rsquo;. Another name for &lsquo;named style&rsquo; is &lsquo;named instance&rsquo;.</p>
<p>For Adobe Multiple Masters fonts, this value is always zero because the format does not support named styles.</p>
</td></tr>
<tr><td class="val" id="axis">axis</td><td class="desc">
<p>An axis descriptor table. TrueType GX and OpenType variation fonts contain slightly more data than Adobe MM fonts. Memory management of this pointer is done internally by FreeType.</p>
</td></tr>
<tr><td class="val" id="namedstyle">namedstyle</td><td class="desc">
<p>A named style (instance) table. Only meaningful for TrueType GX and OpenType variation fonts. Memory management of this pointer is done internally by FreeType.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Get_Multi_Master">FT_Get_Multi_Master</h3>
<p>Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Get_Multi_Master</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-multiple_masters.html#FT_Multi_Master">FT_Multi_Master</a> *amaster );
</pre>
<p>Retrieve a variation descriptor of a given Adobe MM font.</p>
<p>This function can't be used with TrueType GX or OpenType variation fonts.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to the source face.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="amaster">amaster</td><td class="desc">
<p>The Multiple Masters descriptor.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Get_MM_Var">FT_Get_MM_Var</h3>
<p>Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Get_MM_Var</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-multiple_masters.html#FT_MM_Var">FT_MM_Var</a>* *amaster );
</pre>
<p>Retrieve a variation descriptor for a given font.</p>
<p>This function works with all supported variation formats.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to the source face.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="amaster">amaster</td><td class="desc">
<p>The variation descriptor. Allocates a data structure, which the user must deallocate with &lsquo;free&rsquo; after use.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Set_MM_Design_Coordinates">FT_Set_MM_Design_Coordinates</h3>
<p>Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Set_MM_Design_Coordinates</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> num_coords,
<a href="ft2-basic_types.html#FT_Long">FT_Long</a>* coords );
</pre>
<p>For Adobe MM fonts, choose an interpolated font design through design coordinates.</p>
<p>This function can't be used with TrueType GX or OpenType variation fonts.</p>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to the source face.</p>
</td></tr>
</table>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="num_coords">num_coords</td><td class="desc">
<p>The number of available design coordinates. If it is larger than the number of axes, ignore the excess values. If it is smaller than the number of axes, use default values for the remaining axes.</p>
</td></tr>
<tr><td class="val" id="coords">coords</td><td class="desc">
<p>An array of design coordinates.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>To reset all axes to the default values, call the function with &lsquo;num_coords&rsquo; set to zero and &lsquo;coords&rsquo; set to NULL (new feature in FreeType version 2.8.1).</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Set_Var_Design_Coordinates">FT_Set_Var_Design_Coordinates</h3>
<p>Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Set_Var_Design_Coordinates</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> num_coords,
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a>* coords );
</pre>
<p>Choose an interpolated font design through design coordinates.</p>
<p>This function works with all supported variation formats.</p>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to the source face.</p>
</td></tr>
</table>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="num_coords">num_coords</td><td class="desc">
<p>The number of available design coordinates. If it is larger than the number of axes, ignore the excess values. If it is smaller than the number of axes, use default values for the remaining axes.</p>
</td></tr>
<tr><td class="val" id="coords">coords</td><td class="desc">
<p>An array of design coordinates.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>To reset all axes to the default values, call the function with &lsquo;num_coords&rsquo; set to zero and &lsquo;coords&rsquo; set to NULL (new feature in FreeType version 2.8.1).</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Get_Var_Design_Coordinates">FT_Get_Var_Design_Coordinates</h3>
<p>Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Get_Var_Design_Coordinates</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> num_coords,
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a>* coords );
</pre>
<p>Get the design coordinates of the currently selected interpolated font.</p>
<p>This function works with all supported variation formats.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to the source face.</p>
</td></tr>
<tr><td class="val" id="num_coords">num_coords</td><td class="desc">
<p>The number of design coordinates to retrieve. If it is larger than the number of axes, set the excess values to&nbsp;0.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="coords">coords</td><td class="desc">
<p>The design coordinates array.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Set_MM_Blend_Coordinates">FT_Set_MM_Blend_Coordinates</h3>
<p>Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Set_MM_Blend_Coordinates</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> num_coords,
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a>* coords );
</pre>
<p>Choose an interpolated font design through normalized blend coordinates.</p>
<p>This function works with all supported variation formats.</p>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to the source face.</p>
</td></tr>
</table>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="num_coords">num_coords</td><td class="desc">
<p>The number of available design coordinates. If it is larger than the number of axes, ignore the excess values. If it is smaller than the number of axes, use default values for the remaining axes.</p>
</td></tr>
<tr><td class="val" id="coords">coords</td><td class="desc">
<p>The design coordinates array (each element must be between 0 and 1.0 for Adobe MM fonts, and between -1.0 and 1.0 for TrueType GX and OpenType variation fonts).</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>To reset all axes to the default values, call the function with &lsquo;num_coords&rsquo; set to zero and &lsquo;coords&rsquo; set to NULL (new feature in FreeType version 2.8.1).</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Get_MM_Blend_Coordinates">FT_Get_MM_Blend_Coordinates</h3>
<p>Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Get_MM_Blend_Coordinates</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> num_coords,
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a>* coords );
</pre>
<p>Get the normalized blend coordinates of the currently selected interpolated font.</p>
<p>This function works with all supported variation formats.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to the source face.</p>
</td></tr>
<tr><td class="val" id="num_coords">num_coords</td><td class="desc">
<p>The number of normalized blend coordinates to retrieve. If it is larger than the number of axes, set the excess values to&nbsp;0.5 for Adobe MM fonts, and to&nbsp;0 for TrueType GX and OpenType variation fonts.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="coords">coords</td><td class="desc">
<p>The normalized blend coordinates array.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Set_Var_Blend_Coordinates">FT_Set_Var_Blend_Coordinates</h3>
<p>Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Set_Var_Blend_Coordinates</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> num_coords,
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a>* coords );
</pre>
<p>This is another name of <a href="ft2-multiple_masters.html#FT_Set_MM_Blend_Coordinates">FT_Set_MM_Blend_Coordinates</a>.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Get_Var_Blend_Coordinates">FT_Get_Var_Blend_Coordinates</h3>
<p>Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Get_Var_Blend_Coordinates</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> num_coords,
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a>* coords );
</pre>
<p>This is another name of <a href="ft2-multiple_masters.html#FT_Get_MM_Blend_Coordinates">FT_Get_MM_Blend_Coordinates</a>.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_VAR_AXIS_FLAG_XXX">FT_VAR_AXIS_FLAG_XXX</h3>
<p>Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).</p>
<pre>
#define <a href="ft2-multiple_masters.html#FT_VAR_AXIS_FLAG_HIDDEN">FT_VAR_AXIS_FLAG_HIDDEN</a> 1
</pre>
<p>A list of bit flags used in the return value of <a href="ft2-multiple_masters.html#FT_Get_Var_Axis_Flags">FT_Get_Var_Axis_Flags</a>.</p>
<h4>values</h4>
<table class="fields">
<tr><td class="val" id="FT_VAR_AXIS_FLAG_HIDDEN">FT_VAR_AXIS_FLAG_HIDDEN</td><td class="desc">
<p>The variation axis should not be exposed to user interfaces.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Get_Var_Axis_Flags">FT_Get_Var_Axis_Flags</h3>
<p>Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Get_Var_Axis_Flags</b>( <a href="ft2-multiple_masters.html#FT_MM_Var">FT_MM_Var</a>* master,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> axis_index,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a>* flags );
</pre>
<p>Get the &lsquo;flags&rsquo; field of an OpenType Variation Axis Record.</p>
<p>Not meaningful for Adobe MM fonts (&lsquo;*flags&rsquo; is always zero).</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="master">master</td><td class="desc">
<p>The variation descriptor.</p>
</td></tr>
<tr><td class="val" id="axis_index">axis_index</td><td class="desc">
<p>The index of the requested variation axis.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="flags">flags</td><td class="desc">
<p>The &lsquo;flags&rsquo; field. See <a href="ft2-multiple_masters.html#FT_VAR_AXIS_FLAG_XXX">FT_VAR_AXIS_FLAG_XXX</a> for possible values.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
</body>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="ot_validation">OpenType Validation</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_OpenType_Validate">FT_OpenType_Validate</a></td><td>&nbsp;</td><td></td></tr>
<tr><td><a href="#FT_OpenType_Free">FT_OpenType_Free</a></td><td><a href="#FT_VALIDATE_OTXXX">FT_VALIDATE_OTXXX</a></td><td></td></tr>
</table>
<p>This section contains the declaration of functions to validate some OpenType tables (BASE, GDEF, GPOS, GSUB, JSTF, MATH).</p>
<div class="section">
<h3 id="FT_OpenType_Validate">FT_OpenType_Validate</h3>
<p>Defined in FT_OPENTYPE_VALIDATE_H (freetype/ftotval.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_OpenType_Validate</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> validation_flags,
<a href="ft2-basic_types.html#FT_Bytes">FT_Bytes</a> *BASE_table,
<a href="ft2-basic_types.html#FT_Bytes">FT_Bytes</a> *GDEF_table,
<a href="ft2-basic_types.html#FT_Bytes">FT_Bytes</a> *GPOS_table,
<a href="ft2-basic_types.html#FT_Bytes">FT_Bytes</a> *GSUB_table,
<a href="ft2-basic_types.html#FT_Bytes">FT_Bytes</a> *JSTF_table );
</pre>
<p>Validate various OpenType tables to assure that all offsets and indices are valid. The idea is that a higher-level library that actually does the text layout can access those tables without error checking (which can be quite time consuming).</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to the input face.</p>
</td></tr>
<tr><td class="val" id="validation_flags">validation_flags</td><td class="desc">
<p>A bit field that specifies the tables to be validated. See <a href="ft2-ot_validation.html#FT_VALIDATE_OTXXX">FT_VALIDATE_OTXXX</a> for possible values.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="BASE_table">BASE_table</td><td class="desc">
<p>A pointer to the BASE table.</p>
</td></tr>
<tr><td class="val" id="GDEF_table">GDEF_table</td><td class="desc">
<p>A pointer to the GDEF table.</p>
</td></tr>
<tr><td class="val" id="GPOS_table">GPOS_table</td><td class="desc">
<p>A pointer to the GPOS table.</p>
</td></tr>
<tr><td class="val" id="GSUB_table">GSUB_table</td><td class="desc">
<p>A pointer to the GSUB table.</p>
</td></tr>
<tr><td class="val" id="JSTF_table">JSTF_table</td><td class="desc">
<p>A pointer to the JSTF table.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>This function only works with OpenType fonts, returning an error otherwise.</p>
<p>After use, the application should deallocate the five tables with <a href="ft2-ot_validation.html#FT_OpenType_Free">FT_OpenType_Free</a>. A NULL value indicates that the table either doesn't exist in the font, or the application hasn't asked for validation.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_OpenType_Free">FT_OpenType_Free</h3>
<p>Defined in FT_OPENTYPE_VALIDATE_H (freetype/ftotval.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_OpenType_Free</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_Bytes">FT_Bytes</a> table );
</pre>
<p>Free the buffer allocated by OpenType validator.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to the input face.</p>
</td></tr>
<tr><td class="val" id="table">table</td><td class="desc">
<p>The pointer to the buffer that is allocated by <a href="ft2-ot_validation.html#FT_OpenType_Validate">FT_OpenType_Validate</a>.</p>
</td></tr>
</table>
<h4>note</h4>
<p>This function must be used to free the buffer allocated by <a href="ft2-ot_validation.html#FT_OpenType_Validate">FT_OpenType_Validate</a> only.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_VALIDATE_OTXXX">FT_VALIDATE_OTXXX</h3>
<p>Defined in FT_OPENTYPE_VALIDATE_H (freetype/ftotval.h).</p>
<pre>
#define <a href="ft2-ot_validation.html#FT_VALIDATE_BASE">FT_VALIDATE_BASE</a> 0x0100
#define <a href="ft2-ot_validation.html#FT_VALIDATE_GDEF">FT_VALIDATE_GDEF</a> 0x0200
#define <a href="ft2-ot_validation.html#FT_VALIDATE_GPOS">FT_VALIDATE_GPOS</a> 0x0400
#define <a href="ft2-ot_validation.html#FT_VALIDATE_GSUB">FT_VALIDATE_GSUB</a> 0x0800
#define <a href="ft2-ot_validation.html#FT_VALIDATE_JSTF">FT_VALIDATE_JSTF</a> 0x1000
#define <a href="ft2-ot_validation.html#FT_VALIDATE_MATH">FT_VALIDATE_MATH</a> 0x2000
#define <a href="ft2-ot_validation.html#FT_VALIDATE_OT">FT_VALIDATE_OT</a> ( <a href="ft2-ot_validation.html#FT_VALIDATE_BASE">FT_VALIDATE_BASE</a> | \
<a href="ft2-ot_validation.html#FT_VALIDATE_GDEF">FT_VALIDATE_GDEF</a> | \
<a href="ft2-ot_validation.html#FT_VALIDATE_GPOS">FT_VALIDATE_GPOS</a> | \
<a href="ft2-ot_validation.html#FT_VALIDATE_GSUB">FT_VALIDATE_GSUB</a> | \
<a href="ft2-ot_validation.html#FT_VALIDATE_JSTF">FT_VALIDATE_JSTF</a> | \
<a href="ft2-ot_validation.html#FT_VALIDATE_MATH">FT_VALIDATE_MATH</a> )
</pre>
<p>A list of bit-field constants used with <a href="ft2-ot_validation.html#FT_OpenType_Validate">FT_OpenType_Validate</a> to indicate which OpenType tables should be validated.</p>
<h4>values</h4>
<table class="fields">
<tr><td class="val" id="FT_VALIDATE_BASE">FT_VALIDATE_BASE</td><td class="desc">
<p>Validate BASE table.</p>
</td></tr>
<tr><td class="val" id="FT_VALIDATE_GDEF">FT_VALIDATE_GDEF</td><td class="desc">
<p>Validate GDEF table.</p>
</td></tr>
<tr><td class="val" id="FT_VALIDATE_GPOS">FT_VALIDATE_GPOS</td><td class="desc">
<p>Validate GPOS table.</p>
</td></tr>
<tr><td class="val" id="FT_VALIDATE_GSUB">FT_VALIDATE_GSUB</td><td class="desc">
<p>Validate GSUB table.</p>
</td></tr>
<tr><td class="val" id="FT_VALIDATE_JSTF">FT_VALIDATE_JSTF</td><td class="desc">
<p>Validate JSTF table.</p>
</td></tr>
<tr><td class="val" id="FT_VALIDATE_MATH">FT_VALIDATE_MATH</td><td class="desc">
<p>Validate MATH table.</p>
</td></tr>
<tr><td class="val" id="FT_VALIDATE_OT">FT_VALIDATE_OT</td><td class="desc">
<p>Validate all OpenType tables (BASE, GDEF, GPOS, GSUB, JSTF, MATH).</p>
</td></tr>
</table>
<hr>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="outline_processing">Outline Processing</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_Outline">FT_Outline</a></td><td><a href="#FT_Outline_Get_Bitmap">FT_Outline_Get_Bitmap</a></td></tr>
<tr><td><a href="#FT_Outline_New">FT_Outline_New</a></td><td><a href="#FT_Outline_Render">FT_Outline_Render</a></td></tr>
<tr><td><a href="#FT_Outline_Done">FT_Outline_Done</a></td><td><a href="#FT_Outline_Decompose">FT_Outline_Decompose</a></td></tr>
<tr><td><a href="#FT_Outline_Copy">FT_Outline_Copy</a></td><td><a href="#FT_Outline_Funcs">FT_Outline_Funcs</a></td></tr>
<tr><td><a href="#FT_Outline_Translate">FT_Outline_Translate</a></td><td><a href="#FT_Outline_MoveToFunc">FT_Outline_MoveToFunc</a></td></tr>
<tr><td><a href="#FT_Outline_Transform">FT_Outline_Transform</a></td><td><a href="#FT_Outline_LineToFunc">FT_Outline_LineToFunc</a></td></tr>
<tr><td><a href="#FT_Outline_Embolden">FT_Outline_Embolden</a></td><td><a href="#FT_Outline_ConicToFunc">FT_Outline_ConicToFunc</a></td></tr>
<tr><td><a href="#FT_Outline_EmboldenXY">FT_Outline_EmboldenXY</a></td><td><a href="#FT_Outline_CubicToFunc">FT_Outline_CubicToFunc</a></td></tr>
<tr><td><a href="#FT_Outline_Reverse">FT_Outline_Reverse</a></td><td>&nbsp;</td></tr>
<tr><td><a href="#FT_Outline_Check">FT_Outline_Check</a></td><td><a href="#FT_Orientation">FT_Orientation</a></td></tr>
<tr><td>&nbsp;</td><td><a href="#FT_Outline_Get_Orientation">FT_Outline_Get_Orientation</a></td></tr>
<tr><td><a href="#FT_Outline_Get_CBox">FT_Outline_Get_CBox</a></td><td>&nbsp;</td></tr>
<tr><td><a href="#FT_Outline_Get_BBox">FT_Outline_Get_BBox</a></td><td><a href="#FT_OUTLINE_XXX">FT_OUTLINE_XXX</a></td></tr>
<tr><td>&nbsp;</td><td></td></tr>
</table>
<p>This section contains routines used to create and destroy scalable glyph images known as &lsquo;outlines&rsquo;. These can also be measured, transformed, and converted into bitmaps and pixmaps.</p>
<div class="section">
<h3 id="FT_Outline">FT_Outline</h3>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Outline_
{
<span class="keyword">short</span> n_contours; /* number of contours in glyph */
<span class="keyword">short</span> n_points; /* number of points in the glyph */
<a href="ft2-basic_types.html#FT_Vector">FT_Vector</a>* points; /* the outline's points */
<span class="keyword">char</span>* tags; /* the points flags */
<span class="keyword">short</span>* contours; /* the contour end points */
<span class="keyword">int</span> flags; /* outline masks */
} <b>FT_Outline</b>;
</pre>
<p>This structure is used to describe an outline to the scan-line converter.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="n_contours">n_contours</td><td class="desc">
<p>The number of contours in the outline.</p>
</td></tr>
<tr><td class="val" id="n_points">n_points</td><td class="desc">
<p>The number of points in the outline.</p>
</td></tr>
<tr><td class="val" id="points">points</td><td class="desc">
<p>A pointer to an array of &lsquo;n_points&rsquo; <a href="ft2-basic_types.html#FT_Vector">FT_Vector</a> elements, giving the outline's point coordinates.</p>
</td></tr>
<tr><td class="val" id="tags">tags</td><td class="desc">
<p>A pointer to an array of &lsquo;n_points&rsquo; chars, giving each outline point's type.</p>
<p>If bit&nbsp;0 is unset, the point is &lsquo;off&rsquo; the curve, i.e., a Bézier control point, while it is &lsquo;on&rsquo; if set.</p>
<p>Bit&nbsp;1 is meaningful for &lsquo;off&rsquo; points only. If set, it indicates a third-order Bézier arc control point; and a second-order control point if unset.</p>
<p>If bit&nbsp;2 is set, bits 5-7 contain the drop-out mode (as defined in the OpenType specification; the value is the same as the argument to the SCANMODE instruction).</p>
<p>Bits 3 and&nbsp;4 are reserved for internal purposes.</p>
</td></tr>
<tr><td class="val" id="contours">contours</td><td class="desc">
<p>An array of &lsquo;n_contours&rsquo; shorts, giving the end point of each contour within the outline. For example, the first contour is defined by the points &lsquo;0&rsquo; to &lsquo;contours[0]&rsquo;, the second one is defined by the points &lsquo;contours[0]+1&rsquo; to &lsquo;contours[1]&rsquo;, etc.</p>
</td></tr>
<tr><td class="val" id="flags">flags</td><td class="desc">
<p>A set of bit flags used to characterize the outline and give hints to the scan-converter and hinter on how to convert/grid-fit it. See <a href="ft2-outline_processing.html#FT_OUTLINE_XXX">FT_OUTLINE_XXX</a>.</p>
</td></tr>
</table>
<h4>note</h4>
<p>The B/W rasterizer only checks bit&nbsp;2 in the &lsquo;tags&rsquo; array for the first point of each contour. The drop-out mode as given with <a href="ft2-outline_processing.html#FT_OUTLINE_XXX">FT_OUTLINE_IGNORE_DROPOUTS</a>, <a href="ft2-outline_processing.html#FT_OUTLINE_XXX">FT_OUTLINE_SMART_DROPOUTS</a>, and <a href="ft2-outline_processing.html#FT_OUTLINE_XXX">FT_OUTLINE_INCLUDE_STUBS</a> in &lsquo;flags&rsquo; is then overridden.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Outline_New">FT_Outline_New</h3>
<p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Outline_New</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> numPoints,
<a href="ft2-basic_types.html#FT_Int">FT_Int</a> numContours,
<a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a> *anoutline );
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
FT_Outline_New_Internal( <a href="ft2-system_interface.html#FT_Memory">FT_Memory</a> memory,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> numPoints,
<a href="ft2-basic_types.html#FT_Int">FT_Int</a> numContours,
<a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a> *anoutline );
</pre>
<p>Create a new outline of a given size.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="library">library</td><td class="desc">
<p>A handle to the library object from where the outline is allocated. Note however that the new outline will <b>not</b> necessarily be <b>freed</b>, when destroying the library, by <a href="ft2-base_interface.html#FT_Done_FreeType">FT_Done_FreeType</a>.</p>
</td></tr>
<tr><td class="val" id="numPoints">numPoints</td><td class="desc">
<p>The maximum number of points within the outline. Must be smaller than or equal to 0xFFFF (65535).</p>
</td></tr>
<tr><td class="val" id="numContours">numContours</td><td class="desc">
<p>The maximum number of contours within the outline. This value must be in the range 0 to &lsquo;numPoints&rsquo;.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="anoutline">anoutline</td><td class="desc">
<p>A handle to the new outline.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>The reason why this function takes a &lsquo;library&rsquo; parameter is simply to use the library's memory allocator.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Outline_Done">FT_Outline_Done</h3>
<p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Outline_Done</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library,
<a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a>* outline );
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
FT_Outline_Done_Internal( <a href="ft2-system_interface.html#FT_Memory">FT_Memory</a> memory,
<a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a>* outline );
</pre>
<p>Destroy an outline created with <a href="ft2-outline_processing.html#FT_Outline_New">FT_Outline_New</a>.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="library">library</td><td class="desc">
<p>A handle of the library object used to allocate the outline.</p>
</td></tr>
<tr><td class="val" id="outline">outline</td><td class="desc">
<p>A pointer to the outline object to be discarded.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>If the outline's &lsquo;owner&rsquo; field is not set, only the outline descriptor will be released.</p>
<p>The reason why this function takes an &lsquo;library&rsquo; parameter is simply to use ft_mem_free().</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Outline_Copy">FT_Outline_Copy</h3>
<p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Outline_Copy</b>( <span class="keyword">const</span> <a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a>* source,
<a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a> *target );
</pre>
<p>Copy an outline into another one. Both objects must have the same sizes (number of points &amp; number of contours) when this function is called.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="source">source</td><td class="desc">
<p>A handle to the source outline.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="target">target</td><td class="desc">
<p>A handle to the target outline.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Outline_Translate">FT_Outline_Translate</h3>
<p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_Outline_Translate</b>( <span class="keyword">const</span> <a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a>* outline,
<a href="ft2-basic_types.html#FT_Pos">FT_Pos</a> xOffset,
<a href="ft2-basic_types.html#FT_Pos">FT_Pos</a> yOffset );
</pre>
<p>Apply a simple translation to the points of an outline.</p>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="outline">outline</td><td class="desc">
<p>A pointer to the target outline descriptor.</p>
</td></tr>
</table>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="xOffset">xOffset</td><td class="desc">
<p>The horizontal offset.</p>
</td></tr>
<tr><td class="val" id="yOffset">yOffset</td><td class="desc">
<p>The vertical offset.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Outline_Transform">FT_Outline_Transform</h3>
<p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_Outline_Transform</b>( <span class="keyword">const</span> <a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a>* outline,
<span class="keyword">const</span> <a href="ft2-basic_types.html#FT_Matrix">FT_Matrix</a>* matrix );
</pre>
<p>Apply a simple 2x2 matrix to all of an outline's points. Useful for applying rotations, slanting, flipping, etc.</p>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="outline">outline</td><td class="desc">
<p>A pointer to the target outline descriptor.</p>
</td></tr>
</table>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="matrix">matrix</td><td class="desc">
<p>A pointer to the transformation matrix.</p>
</td></tr>
</table>
<h4>note</h4>
<p>You can use <a href="ft2-outline_processing.html#FT_Outline_Translate">FT_Outline_Translate</a> if you need to translate the outline's points.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Outline_Embolden">FT_Outline_Embolden</h3>
<p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Outline_Embolden</b>( <a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a>* outline,
<a href="ft2-basic_types.html#FT_Pos">FT_Pos</a> strength );
</pre>
<p>Embolden an outline. The new outline will be at most 4&nbsp;times &lsquo;strength&rsquo; pixels wider and higher. You may think of the left and bottom borders as unchanged.</p>
<p>Negative &lsquo;strength&rsquo; values to reduce the outline thickness are possible also.</p>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="outline">outline</td><td class="desc">
<p>A handle to the target outline.</p>
</td></tr>
</table>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="strength">strength</td><td class="desc">
<p>How strong the glyph is emboldened. Expressed in 26.6 pixel format.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>The used algorithm to increase or decrease the thickness of the glyph doesn't change the number of points; this means that certain situations like acute angles or intersections are sometimes handled incorrectly.</p>
<p>If you need &lsquo;better&rsquo; metrics values you should call <a href="ft2-outline_processing.html#FT_Outline_Get_CBox">FT_Outline_Get_CBox</a> or <a href="ft2-outline_processing.html#FT_Outline_Get_BBox">FT_Outline_Get_BBox</a>.</p>
<p>Example call:</p>
<pre class="colored">
FT_Load_Glyph( face, index, FT_LOAD_DEFAULT );
if ( face-&gt;glyph-&gt;format == FT_GLYPH_FORMAT_OUTLINE )
FT_Outline_Embolden( &amp;face-&gt;glyph-&gt;outline, strength );
</pre>
<p>To get meaningful results, font scaling values must be set with functions like <a href="ft2-base_interface.html#FT_Set_Char_Size">FT_Set_Char_Size</a> before calling FT_Render_Glyph.</p>
<hr>
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<div class="section">
<h3 id="FT_Outline_EmboldenXY">FT_Outline_EmboldenXY</h3>
<p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Outline_EmboldenXY</b>( <a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a>* outline,
<a href="ft2-basic_types.html#FT_Pos">FT_Pos</a> xstrength,
<a href="ft2-basic_types.html#FT_Pos">FT_Pos</a> ystrength );
</pre>
<p>Embolden an outline. The new outline will be &lsquo;xstrength&rsquo; pixels wider and &lsquo;ystrength&rsquo; pixels higher. Otherwise, it is similar to <a href="ft2-outline_processing.html#FT_Outline_Embolden">FT_Outline_Embolden</a>, which uses the same strength in both directions.</p>
<h4>since</h4>
<p>2.4.10</p>
<hr>
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<div class="section">
<h3 id="FT_Outline_Reverse">FT_Outline_Reverse</h3>
<p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_Outline_Reverse</b>( <a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a>* outline );
</pre>
<p>Reverse the drawing direction of an outline. This is used to ensure consistent fill conventions for mirrored glyphs.</p>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="outline">outline</td><td class="desc">
<p>A pointer to the target outline descriptor.</p>
</td></tr>
</table>
<h4>note</h4>
<p>This function toggles the bit flag <a href="ft2-outline_processing.html#FT_OUTLINE_XXX">FT_OUTLINE_REVERSE_FILL</a> in the outline's &lsquo;flags&rsquo; field.</p>
<p>It shouldn't be used by a normal client application, unless it knows what it is doing.</p>
<hr>
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<div class="section">
<h3 id="FT_Outline_Check">FT_Outline_Check</h3>
<p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Outline_Check</b>( <a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a>* outline );
</pre>
<p>Check the contents of an outline descriptor.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="outline">outline</td><td class="desc">
<p>A handle to a source outline.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>An empty outline, or an outline with a single point only is also valid.</p>
<hr>
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<div class="section">
<h3 id="FT_Outline_Get_CBox">FT_Outline_Get_CBox</h3>
<p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_Outline_Get_CBox</b>( <span class="keyword">const</span> <a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a>* outline,
<a href="ft2-basic_types.html#FT_BBox">FT_BBox</a> *acbox );
</pre>
<p>Return an outline's &lsquo;control box&rsquo;. The control box encloses all the outline's points, including Bézier control points. Though it coincides with the exact bounding box for most glyphs, it can be slightly larger in some situations (like when rotating an outline that contains Bézier outside arcs).</p>
<p>Computing the control box is very fast, while getting the bounding box can take much more time as it needs to walk over all segments and arcs in the outline. To get the latter, you can use the &lsquo;ftbbox&rsquo; component, which is dedicated to this single task.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="outline">outline</td><td class="desc">
<p>A pointer to the source outline descriptor.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="acbox">acbox</td><td class="desc">
<p>The outline's control box.</p>
</td></tr>
</table>
<h4>note</h4>
<p>See <a href="ft2-glyph_management.html#FT_Glyph_Get_CBox">FT_Glyph_Get_CBox</a> for a discussion of tricky fonts.</p>
<hr>
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<div class="section">
<h3 id="FT_Outline_Get_BBox">FT_Outline_Get_BBox</h3>
<p>Defined in FT_BBOX_H (freetype/ftbbox.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Outline_Get_BBox</b>( <a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a>* outline,
<a href="ft2-basic_types.html#FT_BBox">FT_BBox</a> *abbox );
</pre>
<p>Compute the exact bounding box of an outline. This is slower than computing the control box. However, it uses an advanced algorithm that returns <i>very</i> quickly when the two boxes coincide. Otherwise, the outline Bézier arcs are traversed to extract their extrema.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="outline">outline</td><td class="desc">
<p>A pointer to the source outline.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="abbox">abbox</td><td class="desc">
<p>The outline's exact bounding box.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>If the font is tricky and the glyph has been loaded with <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_NO_SCALE</a>, the resulting BBox is meaningless. To get reasonable values for the BBox it is necessary to load the glyph at a large ppem value (so that the hinting instructions can properly shift and scale the subglyphs), then extracting the BBox, which can be eventually converted back to font units.</p>
<hr>
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<div class="section">
<h3 id="FT_Outline_Get_Bitmap">FT_Outline_Get_Bitmap</h3>
<p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Outline_Get_Bitmap</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library,
<a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a>* outline,
<span class="keyword">const</span> <a href="ft2-basic_types.html#FT_Bitmap">FT_Bitmap</a> *abitmap );
</pre>
<p>Render an outline within a bitmap. The outline's image is simply OR-ed to the target bitmap.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="library">library</td><td class="desc">
<p>A handle to a FreeType library object.</p>
</td></tr>
<tr><td class="val" id="outline">outline</td><td class="desc">
<p>A pointer to the source outline descriptor.</p>
</td></tr>
</table>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="abitmap">abitmap</td><td class="desc">
<p>A pointer to the target bitmap descriptor.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>This function does NOT CREATE the bitmap, it only renders an outline image within the one you pass to it! Consequently, the various fields in &lsquo;abitmap&rsquo; should be set accordingly.</p>
<p>It will use the raster corresponding to the default glyph format.</p>
<p>The value of the &lsquo;num_grays&rsquo; field in &lsquo;abitmap&rsquo; is ignored. If you select the gray-level rasterizer, and you want less than 256 gray levels, you have to use <a href="ft2-outline_processing.html#FT_Outline_Render">FT_Outline_Render</a> directly.</p>
<hr>
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<div class="section">
<h3 id="FT_Outline_Render">FT_Outline_Render</h3>
<p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Outline_Render</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library,
<a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a>* outline,
<a href="ft2-raster.html#FT_Raster_Params">FT_Raster_Params</a>* params );
</pre>
<p>Render an outline within a bitmap using the current scan-convert. This function uses an <a href="ft2-raster.html#FT_Raster_Params">FT_Raster_Params</a> structure as an argument, allowing advanced features like direct composition, translucency, etc.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="library">library</td><td class="desc">
<p>A handle to a FreeType library object.</p>
</td></tr>
<tr><td class="val" id="outline">outline</td><td class="desc">
<p>A pointer to the source outline descriptor.</p>
</td></tr>
</table>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="params">params</td><td class="desc">
<p>A pointer to an <a href="ft2-raster.html#FT_Raster_Params">FT_Raster_Params</a> structure used to describe the rendering operation.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>You should know what you are doing and how <a href="ft2-raster.html#FT_Raster_Params">FT_Raster_Params</a> works to use this function.</p>
<p>The field &lsquo;params.source&rsquo; will be set to &lsquo;outline&rsquo; before the scan converter is called, which means that the value you give to it is actually ignored.</p>
<p>The gray-level rasterizer always uses 256 gray levels. If you want less gray levels, you have to provide your own span callback. See the <a href="ft2-raster.html#FT_RASTER_FLAG_XXX">FT_RASTER_FLAG_DIRECT</a> value of the &lsquo;flags&rsquo; field in the <a href="ft2-raster.html#FT_Raster_Params">FT_Raster_Params</a> structure for more details.</p>
<hr>
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<div class="section">
<h3 id="FT_Outline_Decompose">FT_Outline_Decompose</h3>
<p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Outline_Decompose</b>( <a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a>* outline,
<span class="keyword">const</span> <a href="ft2-outline_processing.html#FT_Outline_Funcs">FT_Outline_Funcs</a>* func_interface,
<span class="keyword">void</span>* user );
</pre>
<p>Walk over an outline's structure to decompose it into individual segments and Bézier arcs. This function also emits &lsquo;move to&rsquo; operations to indicate the start of new contours in the outline.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="outline">outline</td><td class="desc">
<p>A pointer to the source target.</p>
</td></tr>
<tr><td class="val" id="func_interface">func_interface</td><td class="desc">
<p>A table of &lsquo;emitters&rsquo;, i.e., function pointers called during decomposition to indicate path operations.</p>
</td></tr>
</table>
<h4>inout</h4>
<table class="fields">
<tr><td class="val" id="user">user</td><td class="desc">
<p>A typeless pointer that is passed to each emitter during the decomposition. It can be used to store the state during the decomposition.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>A contour that contains a single point only is represented by a &lsquo;move to&rsquo; operation followed by &lsquo;line to&rsquo; to the same point. In most cases, it is best to filter this out before using the outline for stroking purposes (otherwise it would result in a visible dot when round caps are used).</p>
<p>Similarly, the function returns success for an empty outline also (doing nothing, this is, not calling any emitter); if necessary, you should filter this out, too.</p>
<hr>
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<div class="section">
<h3 id="FT_Outline_Funcs">FT_Outline_Funcs</h3>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Outline_Funcs_
{
<a href="ft2-outline_processing.html#FT_Outline_MoveToFunc">FT_Outline_MoveToFunc</a> move_to;
<a href="ft2-outline_processing.html#FT_Outline_LineToFunc">FT_Outline_LineToFunc</a> line_to;
<a href="ft2-outline_processing.html#FT_Outline_ConicToFunc">FT_Outline_ConicToFunc</a> conic_to;
<a href="ft2-outline_processing.html#FT_Outline_CubicToFunc">FT_Outline_CubicToFunc</a> cubic_to;
<span class="keyword">int</span> shift;
<a href="ft2-basic_types.html#FT_Pos">FT_Pos</a> delta;
} <b>FT_Outline_Funcs</b>;
</pre>
<p>A structure to hold various function pointers used during outline decomposition in order to emit segments, conic, and cubic Béziers.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="move_to">move_to</td><td class="desc">
<p>The &lsquo;move to&rsquo; emitter.</p>
</td></tr>
<tr><td class="val" id="line_to">line_to</td><td class="desc">
<p>The segment emitter.</p>
</td></tr>
<tr><td class="val" id="conic_to">conic_to</td><td class="desc">
<p>The second-order Bézier arc emitter.</p>
</td></tr>
<tr><td class="val" id="cubic_to">cubic_to</td><td class="desc">
<p>The third-order Bézier arc emitter.</p>
</td></tr>
<tr><td class="val" id="shift">shift</td><td class="desc">
<p>The shift that is applied to coordinates before they are sent to the emitter.</p>
</td></tr>
<tr><td class="val" id="delta">delta</td><td class="desc">
<p>The delta that is applied to coordinates before they are sent to the emitter, but after the shift.</p>
</td></tr>
</table>
<h4>note</h4>
<p>The point coordinates sent to the emitters are the transformed version of the original coordinates (this is important for high accuracy during scan-conversion). The transformation is simple:</p>
<pre class="colored">
x' = (x &lt;&lt; shift) - delta
y' = (y &lt;&lt; shift) - delta
</pre>
<p>Set the values of &lsquo;shift&rsquo; and &lsquo;delta&rsquo; to&nbsp;0 to get the original point coordinates.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Outline_MoveToFunc">FT_Outline_MoveToFunc</h3>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">int</span>
(*<b>FT_Outline_MoveToFunc</b>)( <span class="keyword">const</span> <a href="ft2-basic_types.html#FT_Vector">FT_Vector</a>* to,
<span class="keyword">void</span>* user );
#define FT_Outline_MoveTo_Func <b>FT_Outline_MoveToFunc</b>
</pre>
<p>A function pointer type used to describe the signature of a &lsquo;move to&rsquo; function during outline walking/decomposition.</p>
<p>A &lsquo;move to&rsquo; is emitted to start a new contour in an outline.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="to">to</td><td class="desc">
<p>A pointer to the target point of the &lsquo;move to&rsquo;.</p>
</td></tr>
<tr><td class="val" id="user">user</td><td class="desc">
<p>A typeless pointer, which is passed from the caller of the decomposition function.</p>
</td></tr>
</table>
<h4>return</h4>
<p>Error code. 0&nbsp;means success.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Outline_LineToFunc">FT_Outline_LineToFunc</h3>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">int</span>
(*<b>FT_Outline_LineToFunc</b>)( <span class="keyword">const</span> <a href="ft2-basic_types.html#FT_Vector">FT_Vector</a>* to,
<span class="keyword">void</span>* user );
#define FT_Outline_LineTo_Func <b>FT_Outline_LineToFunc</b>
</pre>
<p>A function pointer type used to describe the signature of a &lsquo;line to&rsquo; function during outline walking/decomposition.</p>
<p>A &lsquo;line to&rsquo; is emitted to indicate a segment in the outline.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="to">to</td><td class="desc">
<p>A pointer to the target point of the &lsquo;line to&rsquo;.</p>
</td></tr>
<tr><td class="val" id="user">user</td><td class="desc">
<p>A typeless pointer, which is passed from the caller of the decomposition function.</p>
</td></tr>
</table>
<h4>return</h4>
<p>Error code. 0&nbsp;means success.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Outline_ConicToFunc">FT_Outline_ConicToFunc</h3>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">int</span>
(*<b>FT_Outline_ConicToFunc</b>)( <span class="keyword">const</span> <a href="ft2-basic_types.html#FT_Vector">FT_Vector</a>* control,
<span class="keyword">const</span> <a href="ft2-basic_types.html#FT_Vector">FT_Vector</a>* to,
<span class="keyword">void</span>* user );
#define FT_Outline_ConicTo_Func <b>FT_Outline_ConicToFunc</b>
</pre>
<p>A function pointer type used to describe the signature of a &lsquo;conic to&rsquo; function during outline walking or decomposition.</p>
<p>A &lsquo;conic to&rsquo; is emitted to indicate a second-order Bézier arc in the outline.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="control">control</td><td class="desc">
<p>An intermediate control point between the last position and the new target in &lsquo;to&rsquo;.</p>
</td></tr>
<tr><td class="val" id="to">to</td><td class="desc">
<p>A pointer to the target end point of the conic arc.</p>
</td></tr>
<tr><td class="val" id="user">user</td><td class="desc">
<p>A typeless pointer, which is passed from the caller of the decomposition function.</p>
</td></tr>
</table>
<h4>return</h4>
<p>Error code. 0&nbsp;means success.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Outline_CubicToFunc">FT_Outline_CubicToFunc</h3>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">int</span>
(*<b>FT_Outline_CubicToFunc</b>)( <span class="keyword">const</span> <a href="ft2-basic_types.html#FT_Vector">FT_Vector</a>* control1,
<span class="keyword">const</span> <a href="ft2-basic_types.html#FT_Vector">FT_Vector</a>* control2,
<span class="keyword">const</span> <a href="ft2-basic_types.html#FT_Vector">FT_Vector</a>* to,
<span class="keyword">void</span>* user );
#define FT_Outline_CubicTo_Func <b>FT_Outline_CubicToFunc</b>
</pre>
<p>A function pointer type used to describe the signature of a &lsquo;cubic to&rsquo; function during outline walking or decomposition.</p>
<p>A &lsquo;cubic to&rsquo; is emitted to indicate a third-order Bézier arc.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="control1">control1</td><td class="desc">
<p>A pointer to the first Bézier control point.</p>
</td></tr>
<tr><td class="val" id="control2">control2</td><td class="desc">
<p>A pointer to the second Bézier control point.</p>
</td></tr>
<tr><td class="val" id="to">to</td><td class="desc">
<p>A pointer to the target end point.</p>
</td></tr>
<tr><td class="val" id="user">user</td><td class="desc">
<p>A typeless pointer, which is passed from the caller of the decomposition function.</p>
</td></tr>
</table>
<h4>return</h4>
<p>Error code. 0&nbsp;means success.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Orientation">FT_Orientation</h3>
<p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">enum</span> FT_Orientation_
{
<a href="ft2-outline_processing.html#FT_ORIENTATION_TRUETYPE">FT_ORIENTATION_TRUETYPE</a> = 0,
<a href="ft2-outline_processing.html#FT_ORIENTATION_POSTSCRIPT">FT_ORIENTATION_POSTSCRIPT</a> = 1,
<a href="ft2-outline_processing.html#FT_ORIENTATION_FILL_RIGHT">FT_ORIENTATION_FILL_RIGHT</a> = <a href="ft2-outline_processing.html#FT_ORIENTATION_TRUETYPE">FT_ORIENTATION_TRUETYPE</a>,
<a href="ft2-outline_processing.html#FT_ORIENTATION_FILL_LEFT">FT_ORIENTATION_FILL_LEFT</a> = <a href="ft2-outline_processing.html#FT_ORIENTATION_POSTSCRIPT">FT_ORIENTATION_POSTSCRIPT</a>,
<a href="ft2-outline_processing.html#FT_ORIENTATION_NONE">FT_ORIENTATION_NONE</a>
} <b>FT_Orientation</b>;
</pre>
<p>A list of values used to describe an outline's contour orientation.</p>
<p>The TrueType and PostScript specifications use different conventions to determine whether outline contours should be filled or unfilled.</p>
<h4>values</h4>
<table class="fields">
<tr><td class="val" id="FT_ORIENTATION_TRUETYPE">FT_ORIENTATION_TRUETYPE</td><td class="desc">
<p>According to the TrueType specification, clockwise contours must be filled, and counter-clockwise ones must be unfilled.</p>
</td></tr>
<tr><td class="val" id="FT_ORIENTATION_POSTSCRIPT">FT_ORIENTATION_POSTSCRIPT</td><td class="desc">
<p>According to the PostScript specification, counter-clockwise contours must be filled, and clockwise ones must be unfilled.</p>
</td></tr>
<tr><td class="val" id="FT_ORIENTATION_FILL_RIGHT">FT_ORIENTATION_FILL_RIGHT</td><td class="desc">
<p>This is identical to <a href="ft2-outline_processing.html#FT_Orientation">FT_ORIENTATION_TRUETYPE</a>, but is used to remember that in TrueType, everything that is to the right of the drawing direction of a contour must be filled.</p>
</td></tr>
<tr><td class="val" id="FT_ORIENTATION_FILL_LEFT">FT_ORIENTATION_FILL_LEFT</td><td class="desc">
<p>This is identical to <a href="ft2-outline_processing.html#FT_Orientation">FT_ORIENTATION_POSTSCRIPT</a>, but is used to remember that in PostScript, everything that is to the left of the drawing direction of a contour must be filled.</p>
</td></tr>
<tr><td class="val" id="FT_ORIENTATION_NONE">FT_ORIENTATION_NONE</td><td class="desc">
<p>The orientation cannot be determined. That is, different parts of the glyph have different orientation.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Outline_Get_Orientation">FT_Outline_Get_Orientation</h3>
<p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
<pre>
FT_EXPORT( <a href="ft2-outline_processing.html#FT_Orientation">FT_Orientation</a> )
<b>FT_Outline_Get_Orientation</b>( <a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a>* outline );
</pre>
<p>This function analyzes a glyph outline and tries to compute its fill orientation (see <a href="ft2-outline_processing.html#FT_Orientation">FT_Orientation</a>). This is done by integrating the total area covered by the outline. The positive integral corresponds to the clockwise orientation and <a href="ft2-outline_processing.html#FT_Orientation">FT_ORIENTATION_POSTSCRIPT</a> is returned. The negative integral corresponds to the counter-clockwise orientation and <a href="ft2-outline_processing.html#FT_Orientation">FT_ORIENTATION_TRUETYPE</a> is returned.</p>
<p>Note that this will return <a href="ft2-outline_processing.html#FT_Orientation">FT_ORIENTATION_TRUETYPE</a> for empty outlines.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="outline">outline</td><td class="desc">
<p>A handle to the source outline.</p>
</td></tr>
</table>
<h4>return</h4>
<p>The orientation.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_OUTLINE_XXX">FT_OUTLINE_XXX</h3>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<pre>
#define <a href="ft2-outline_processing.html#FT_OUTLINE_NONE">FT_OUTLINE_NONE</a> 0x0
#define <a href="ft2-outline_processing.html#FT_OUTLINE_OWNER">FT_OUTLINE_OWNER</a> 0x1
#define <a href="ft2-outline_processing.html#FT_OUTLINE_EVEN_ODD_FILL">FT_OUTLINE_EVEN_ODD_FILL</a> 0x2
#define <a href="ft2-outline_processing.html#FT_OUTLINE_REVERSE_FILL">FT_OUTLINE_REVERSE_FILL</a> 0x4
#define <a href="ft2-outline_processing.html#FT_OUTLINE_IGNORE_DROPOUTS">FT_OUTLINE_IGNORE_DROPOUTS</a> 0x8
#define <a href="ft2-outline_processing.html#FT_OUTLINE_SMART_DROPOUTS">FT_OUTLINE_SMART_DROPOUTS</a> 0x10
#define <a href="ft2-outline_processing.html#FT_OUTLINE_INCLUDE_STUBS">FT_OUTLINE_INCLUDE_STUBS</a> 0x20
#define <a href="ft2-outline_processing.html#FT_OUTLINE_HIGH_PRECISION">FT_OUTLINE_HIGH_PRECISION</a> 0x100
#define <a href="ft2-outline_processing.html#FT_OUTLINE_SINGLE_PASS">FT_OUTLINE_SINGLE_PASS</a> 0x200
/* these constants are deprecated; use the corresponding */
/* `<b>FT_OUTLINE_XXX</b>' values instead */
#define ft_outline_none <a href="ft2-outline_processing.html#FT_OUTLINE_NONE">FT_OUTLINE_NONE</a>
#define ft_outline_owner <a href="ft2-outline_processing.html#FT_OUTLINE_OWNER">FT_OUTLINE_OWNER</a>
#define ft_outline_even_odd_fill <a href="ft2-outline_processing.html#FT_OUTLINE_EVEN_ODD_FILL">FT_OUTLINE_EVEN_ODD_FILL</a>
#define ft_outline_reverse_fill <a href="ft2-outline_processing.html#FT_OUTLINE_REVERSE_FILL">FT_OUTLINE_REVERSE_FILL</a>
#define ft_outline_ignore_dropouts <a href="ft2-outline_processing.html#FT_OUTLINE_IGNORE_DROPOUTS">FT_OUTLINE_IGNORE_DROPOUTS</a>
#define ft_outline_high_precision <a href="ft2-outline_processing.html#FT_OUTLINE_HIGH_PRECISION">FT_OUTLINE_HIGH_PRECISION</a>
#define ft_outline_single_pass <a href="ft2-outline_processing.html#FT_OUTLINE_SINGLE_PASS">FT_OUTLINE_SINGLE_PASS</a>
</pre>
<p>A list of bit-field constants use for the flags in an outline's &lsquo;flags&rsquo; field.</p>
<h4>values</h4>
<table class="fields">
<tr><td class="val" id="FT_OUTLINE_NONE">FT_OUTLINE_NONE</td><td class="desc">
<p>Value&nbsp;0 is reserved.</p>
</td></tr>
<tr><td class="val" id="FT_OUTLINE_OWNER">FT_OUTLINE_OWNER</td><td class="desc">
<p>If set, this flag indicates that the outline's field arrays (i.e., &lsquo;points&rsquo;, &lsquo;flags&rsquo;, and &lsquo;contours&rsquo;) are &lsquo;owned&rsquo; by the outline object, and should thus be freed when it is destroyed.</p>
</td></tr>
<tr><td class="val" id="FT_OUTLINE_EVEN_ODD_FILL">FT_OUTLINE_EVEN_ODD_FILL</td><td class="desc">
<p>By default, outlines are filled using the non-zero winding rule. If set to 1, the outline will be filled using the even-odd fill rule (only works with the smooth rasterizer).</p>
</td></tr>
<tr><td class="val" id="FT_OUTLINE_REVERSE_FILL">FT_OUTLINE_REVERSE_FILL</td><td class="desc">
<p>By default, outside contours of an outline are oriented in clock-wise direction, as defined in the TrueType specification. This flag is set if the outline uses the opposite direction (typically for Type&nbsp;1 fonts). This flag is ignored by the scan converter.</p>
</td></tr>
<tr><td class="val" id="FT_OUTLINE_IGNORE_DROPOUTS">FT_OUTLINE_IGNORE_DROPOUTS</td><td class="desc">
<p>By default, the scan converter will try to detect drop-outs in an outline and correct the glyph bitmap to ensure consistent shape continuity. If set, this flag hints the scan-line converter to ignore such cases. See below for more information.</p>
</td></tr>
<tr><td class="val" id="FT_OUTLINE_SMART_DROPOUTS">FT_OUTLINE_SMART_DROPOUTS</td><td class="desc">
<p>Select smart dropout control. If unset, use simple dropout control. Ignored if <a href="ft2-outline_processing.html#FT_OUTLINE_XXX">FT_OUTLINE_IGNORE_DROPOUTS</a> is set. See below for more information.</p>
</td></tr>
<tr><td class="val" id="FT_OUTLINE_INCLUDE_STUBS">FT_OUTLINE_INCLUDE_STUBS</td><td class="desc">
<p>If set, turn pixels on for &lsquo;stubs&rsquo;, otherwise exclude them. Ignored if <a href="ft2-outline_processing.html#FT_OUTLINE_XXX">FT_OUTLINE_IGNORE_DROPOUTS</a> is set. See below for more information.</p>
</td></tr>
<tr><td class="val" id="FT_OUTLINE_HIGH_PRECISION">FT_OUTLINE_HIGH_PRECISION</td><td class="desc">
<p>This flag indicates that the scan-line converter should try to convert this outline to bitmaps with the highest possible quality. It is typically set for small character sizes. Note that this is only a hint that might be completely ignored by a given scan-converter.</p>
</td></tr>
<tr><td class="val" id="FT_OUTLINE_SINGLE_PASS">FT_OUTLINE_SINGLE_PASS</td><td class="desc">
<p>This flag is set to force a given scan-converter to only use a single pass over the outline to render a bitmap glyph image. Normally, it is set for very large character sizes. It is only a hint that might be completely ignored by a given scan-converter.</p>
</td></tr>
</table>
<h4>note</h4>
<p>The flags <a href="ft2-outline_processing.html#FT_OUTLINE_XXX">FT_OUTLINE_IGNORE_DROPOUTS</a>, <a href="ft2-outline_processing.html#FT_OUTLINE_XXX">FT_OUTLINE_SMART_DROPOUTS</a>, and <a href="ft2-outline_processing.html#FT_OUTLINE_XXX">FT_OUTLINE_INCLUDE_STUBS</a> are ignored by the smooth rasterizer.</p>
<p>There exists a second mechanism to pass the drop-out mode to the B/W rasterizer; see the &lsquo;tags&rsquo; field in <a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a>.</p>
<p>Please refer to the description of the &lsquo;SCANTYPE&rsquo; instruction in the OpenType specification (in file &lsquo;ttinst1.doc&rsquo;) how simple drop-outs, smart drop-outs, and stubs are defined.</p>
<hr>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="pcf_driver">The PCF driver</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#no-long-family-names">no-long-family-names</a></td><td></td><td></td></tr>
</table>
<p>While FreeType's PCF driver doesn't expose API functions by itself, it is possible to control its behaviour with <a href="ft2-module_management.html#FT_Property_Set">FT_Property_Set</a> and <a href="ft2-module_management.html#FT_Property_Get">FT_Property_Get</a>. Right now, there is a single property &lsquo;no-long-family-names&rsquo; available if FreeType is compiled with PCF_CONFIG_OPTION_LONG_FAMILY_NAMES.</p>
<p>The PCF driver's module name is &lsquo;pcf&rsquo;.</p>
<div class="section">
<h3 id="no-long-family-names">no-long-family-names</h3>
<p>Defined in FT_PCF_DRIVER_H (freetype/ftpcfdrv.h).</p>
<pre>
FT_END_HEADER
#endif /* FTPCFDRV_H_ */
/* END */
</pre>
<p>If PCF_CONFIG_OPTION_LONG_FAMILY_NAMES is active while compiling FreeType, the PCF driver constructs long family names.</p>
<p>There are many PCF fonts just called &lsquo;Fixed&rsquo; which look completely different, and which have nothing to do with each other. When selecting &lsquo;Fixed&rsquo; in KDE or Gnome one gets results that appear rather random, the style changes often if one changes the size and one cannot select some fonts at all. The improve this situation, the PCF module prepends the foundry name (plus a space) to the family name. It also checks whether there are &lsquo;wide&rsquo; characters; all put together, family names like &lsquo;Sony Fixed&rsquo; or &lsquo;Misc Fixed Wide&rsquo; are constructed.</p>
<p>If &lsquo;no-long-family-names&rsquo; is set, this feature gets switched off.</p>
<pre class="colored">
FT_Library library;
FT_Bool no_long_family_names = TRUE;
FT_Init_FreeType( &amp;library );
FT_Property_Set( library, "pcf",
"no-long-family-names",
&amp;no_long_family_names );
</pre>
<h4>note</h4>
<p>This property can be used with <a href="ft2-module_management.html#FT_Property_Get">FT_Property_Get</a> also.</p>
<p>This property can be set via the &lsquo;FREETYPE_PROPERTIES&rsquo; environment variable (using values 1 and 0 for &lsquo;on&rsquo; and &lsquo;off&rsquo;, respectively).</p>
<hr>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="pfr_fonts">PFR Fonts</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_Get_PFR_Metrics">FT_Get_PFR_Metrics</a></td><td><a href="#FT_Get_PFR_Kerning">FT_Get_PFR_Kerning</a></td><td><a href="#FT_Get_PFR_Advance">FT_Get_PFR_Advance</a></td></tr>
</table>
<p>This section contains the declaration of PFR-specific functions.</p>
<div class="section">
<h3 id="FT_Get_PFR_Metrics">FT_Get_PFR_Metrics</h3>
<p>Defined in FT_PFR_H (freetype/ftpfr.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Get_PFR_Metrics</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> *aoutline_resolution,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> *ametrics_resolution,
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> *ametrics_x_scale,
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> *ametrics_y_scale );
</pre>
<p>Return the outline and metrics resolutions of a given PFR face.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>Handle to the input face. It can be a non-PFR face.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="aoutline_resolution">aoutline_resolution</td><td class="desc">
<p>Outline resolution. This is equivalent to &lsquo;face-&gt;units_per_EM&rsquo; for non-PFR fonts. Optional (parameter can be NULL).</p>
</td></tr>
<tr><td class="val" id="ametrics_resolution">ametrics_resolution</td><td class="desc">
<p>Metrics resolution. This is equivalent to &lsquo;outline_resolution&rsquo; for non-PFR fonts. Optional (parameter can be NULL).</p>
</td></tr>
<tr><td class="val" id="ametrics_x_scale">ametrics_x_scale</td><td class="desc">
<p>A 16.16 fixed-point number used to scale distance expressed in metrics units to device sub-pixels. This is equivalent to &lsquo;face-&gt;size-&gt;x_scale&rsquo;, but for metrics only. Optional (parameter can be NULL).</p>
</td></tr>
<tr><td class="val" id="ametrics_y_scale">ametrics_y_scale</td><td class="desc">
<p>Same as &lsquo;ametrics_x_scale&rsquo; but for the vertical direction. optional (parameter can be NULL).</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>If the input face is not a PFR, this function will return an error. However, in all cases, it will return valid values.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Get_PFR_Kerning">FT_Get_PFR_Kerning</h3>
<p>Defined in FT_PFR_H (freetype/ftpfr.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Get_PFR_Kerning</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> left,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> right,
<a href="ft2-basic_types.html#FT_Vector">FT_Vector</a> *avector );
</pre>
<p>Return the kerning pair corresponding to two glyphs in a PFR face. The distance is expressed in metrics units, unlike the result of <a href="ft2-base_interface.html#FT_Get_Kerning">FT_Get_Kerning</a>.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to the input face.</p>
</td></tr>
<tr><td class="val" id="left">left</td><td class="desc">
<p>Index of the left glyph.</p>
</td></tr>
<tr><td class="val" id="right">right</td><td class="desc">
<p>Index of the right glyph.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="avector">avector</td><td class="desc">
<p>A kerning vector.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>This function always return distances in original PFR metrics units. This is unlike <a href="ft2-base_interface.html#FT_Get_Kerning">FT_Get_Kerning</a> with the <a href="ft2-base_interface.html#FT_Kerning_Mode">FT_KERNING_UNSCALED</a> mode, which always returns distances converted to outline units.</p>
<p>You can use the value of the &lsquo;x_scale&rsquo; and &lsquo;y_scale&rsquo; parameters returned by <a href="ft2-pfr_fonts.html#FT_Get_PFR_Metrics">FT_Get_PFR_Metrics</a> to scale these to device sub-pixels.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Get_PFR_Advance">FT_Get_PFR_Advance</h3>
<p>Defined in FT_PFR_H (freetype/ftpfr.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Get_PFR_Advance</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> gindex,
<a href="ft2-basic_types.html#FT_Pos">FT_Pos</a> *aadvance );
</pre>
<p>Return a given glyph advance, expressed in original metrics units, from a PFR font.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to the input face.</p>
</td></tr>
<tr><td class="val" id="gindex">gindex</td><td class="desc">
<p>The glyph index.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="aadvance">aadvance</td><td class="desc">
<p>The glyph advance in metrics units.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>You can use the &lsquo;x_scale&rsquo; or &lsquo;y_scale&rsquo; results of <a href="ft2-pfr_fonts.html#FT_Get_PFR_Metrics">FT_Get_PFR_Metrics</a> to convert the advance to device sub-pixels (i.e., 1/64th of pixels).</p>
<hr>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="quick_advance">Quick retrieval of advance values</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_Get_Advance">FT_Get_Advance</a></td><td>&nbsp;</td></tr>
<tr><td><a href="#FT_Get_Advances">FT_Get_Advances</a></td><td><a href="#FT_ADVANCE_FLAG_FAST_ONLY">FT_ADVANCE_FLAG_FAST_ONLY</a></td></tr>
</table>
<p>This section contains functions to quickly extract advance values without handling glyph outlines, if possible.</p>
<div class="section">
<h3 id="FT_Get_Advance">FT_Get_Advance</h3>
<p>Defined in FT_ADVANCES_H (freetype/ftadvanc.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Get_Advance</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> gindex,
<a href="ft2-basic_types.html#FT_Int32">FT_Int32</a> load_flags,
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> *padvance );
</pre>
<p>Retrieve the advance value of a given glyph outline in an <a href="ft2-base_interface.html#FT_Face">FT_Face</a>.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>The source <a href="ft2-base_interface.html#FT_Face">FT_Face</a> handle.</p>
</td></tr>
<tr><td class="val" id="gindex">gindex</td><td class="desc">
<p>The glyph index.</p>
</td></tr>
<tr><td class="val" id="load_flags">load_flags</td><td class="desc">
<p>A set of bit flags similar to those used when calling <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a>, used to determine what kind of advances you need.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="padvance">padvance</td><td class="desc">
<p>The advance value. If scaling is performed (based on the value of &lsquo;load_flags&rsquo;), the advance value is in 16.16 format. Otherwise, it is in font units.</p>
<p>If <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_VERTICAL_LAYOUT</a> is set, this is the vertical advance corresponding to a vertical layout. Otherwise, it is the horizontal advance in a horizontal layout.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0 means success.</p>
<h4>note</h4>
<p>This function may fail if you use <a href="ft2-quick_advance.html#FT_ADVANCE_FLAG_FAST_ONLY">FT_ADVANCE_FLAG_FAST_ONLY</a> and if the corresponding font backend doesn't have a quick way to retrieve the advances.</p>
<p>A scaled advance is returned in 16.16 format but isn't transformed by the affine transformation specified by <a href="ft2-base_interface.html#FT_Set_Transform">FT_Set_Transform</a>.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Get_Advances">FT_Get_Advances</h3>
<p>Defined in FT_ADVANCES_H (freetype/ftadvanc.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Get_Advances</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> start,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> count,
<a href="ft2-basic_types.html#FT_Int32">FT_Int32</a> load_flags,
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> *padvances );
</pre>
<p>Retrieve the advance values of several glyph outlines in an <a href="ft2-base_interface.html#FT_Face">FT_Face</a>.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>The source <a href="ft2-base_interface.html#FT_Face">FT_Face</a> handle.</p>
</td></tr>
<tr><td class="val" id="start">start</td><td class="desc">
<p>The first glyph index.</p>
</td></tr>
<tr><td class="val" id="count">count</td><td class="desc">
<p>The number of advance values you want to retrieve.</p>
</td></tr>
<tr><td class="val" id="load_flags">load_flags</td><td class="desc">
<p>A set of bit flags similar to those used when calling <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a>.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="padvance">padvance</td><td class="desc">
<p>The advance values. This array, to be provided by the caller, must contain at least &lsquo;count&rsquo; elements.</p>
<p>If scaling is performed (based on the value of &lsquo;load_flags&rsquo;), the advance values are in 16.16 format. Otherwise, they are in font units.</p>
<p>If <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_VERTICAL_LAYOUT</a> is set, these are the vertical advances corresponding to a vertical layout. Otherwise, they are the horizontal advances in a horizontal layout.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0 means success.</p>
<h4>note</h4>
<p>This function may fail if you use <a href="ft2-quick_advance.html#FT_ADVANCE_FLAG_FAST_ONLY">FT_ADVANCE_FLAG_FAST_ONLY</a> and if the corresponding font backend doesn't have a quick way to retrieve the advances.</p>
<p>Scaled advances are returned in 16.16 format but aren't transformed by the affine transformation specified by <a href="ft2-base_interface.html#FT_Set_Transform">FT_Set_Transform</a>.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_ADVANCE_FLAG_FAST_ONLY">FT_ADVANCE_FLAG_FAST_ONLY</h3>
<p>Defined in FT_ADVANCES_H (freetype/ftadvanc.h).</p>
<pre>
#define <b>FT_ADVANCE_FLAG_FAST_ONLY</b> 0x20000000L
</pre>
<p>A bit-flag to be OR-ed with the &lsquo;flags&rsquo; parameter of the <a href="ft2-quick_advance.html#FT_Get_Advance">FT_Get_Advance</a> and <a href="ft2-quick_advance.html#FT_Get_Advances">FT_Get_Advances</a> functions.</p>
<p>If set, it indicates that you want these functions to fail if the corresponding hinting mode or font driver doesn't allow for very quick advance computation.</p>
<p>Typically, glyphs that are either unscaled, unhinted, bitmapped, or light-hinted can have their advance width computed very quickly.</p>
<p>Normal and bytecode hinted modes that require loading, scaling, and hinting of the glyph outline, are extremely slow by comparison.</p>
<hr>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="raster">Scanline Converter</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_Raster">FT_Raster</a></td><td>&nbsp;</td><td><a href="#FT_Raster_Funcs">FT_Raster_Funcs</a></td></tr>
<tr><td><a href="#FT_Span">FT_Span</a></td><td><a href="#FT_Raster_NewFunc">FT_Raster_NewFunc</a></td><td>&nbsp;</td></tr>
<tr><td><a href="#FT_SpanFunc">FT_SpanFunc</a></td><td><a href="#FT_Raster_DoneFunc">FT_Raster_DoneFunc</a></td><td><a href="#FT_Raster_BitTest_Func">FT_Raster_BitTest_Func</a></td></tr>
<tr><td>&nbsp;</td><td><a href="#FT_Raster_ResetFunc">FT_Raster_ResetFunc</a></td><td><a href="#FT_Raster_BitSet_Func">FT_Raster_BitSet_Func</a></td></tr>
<tr><td><a href="#FT_Raster_Params">FT_Raster_Params</a></td><td><a href="#FT_Raster_SetModeFunc">FT_Raster_SetModeFunc</a></td><td></td></tr>
<tr><td><a href="#FT_RASTER_FLAG_XXX">FT_RASTER_FLAG_XXX</a></td><td><a href="#FT_Raster_RenderFunc">FT_Raster_RenderFunc</a></td><td></td></tr>
</table>
<p>This section contains technical definitions.</p>
<div class="section">
<h3 id="FT_Raster">FT_Raster</h3>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_RasterRec_* <b>FT_Raster</b>;
</pre>
<p>An opaque handle (pointer) to a raster object. Each object can be used independently to convert an outline into a bitmap or pixmap.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Span">FT_Span</h3>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Span_
{
<span class="keyword">short</span> x;
<span class="keyword">unsigned</span> <span class="keyword">short</span> len;
<span class="keyword">unsigned</span> <span class="keyword">char</span> coverage;
} <b>FT_Span</b>;
</pre>
<p>A structure used to model a single span of gray pixels when rendering an anti-aliased bitmap.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="x">x</td><td class="desc">
<p>The span's horizontal start position.</p>
</td></tr>
<tr><td class="val" id="len">len</td><td class="desc">
<p>The span's length in pixels.</p>
</td></tr>
<tr><td class="val" id="coverage">coverage</td><td class="desc">
<p>The span color/coverage, ranging from 0 (background) to 255 (foreground).</p>
</td></tr>
</table>
<h4>note</h4>
<p>This structure is used by the span drawing callback type named <a href="ft2-raster.html#FT_SpanFunc">FT_SpanFunc</a> that takes the y&nbsp;coordinate of the span as a parameter.</p>
<p>The coverage value is always between 0 and 255. If you want less gray values, the callback function has to reduce them.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_SpanFunc">FT_SpanFunc</h3>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">void</span>
(*<b>FT_SpanFunc</b>)( <span class="keyword">int</span> y,
<span class="keyword">int</span> count,
<span class="keyword">const</span> <a href="ft2-raster.html#FT_Span">FT_Span</a>* spans,
<span class="keyword">void</span>* user );
#define FT_Raster_Span_Func <b>FT_SpanFunc</b>
</pre>
<p>A function used as a call-back by the anti-aliased renderer in order to let client applications draw themselves the gray pixel spans on each scan line.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="y">y</td><td class="desc">
<p>The scanline's y&nbsp;coordinate.</p>
</td></tr>
<tr><td class="val" id="count">count</td><td class="desc">
<p>The number of spans to draw on this scanline.</p>
</td></tr>
<tr><td class="val" id="spans">spans</td><td class="desc">
<p>A table of &lsquo;count&rsquo; spans to draw on the scanline.</p>
</td></tr>
<tr><td class="val" id="user">user</td><td class="desc">
<p>User-supplied data that is passed to the callback.</p>
</td></tr>
</table>
<h4>note</h4>
<p>This callback allows client applications to directly render the gray spans of the anti-aliased bitmap to any kind of surfaces.</p>
<p>This can be used to write anti-aliased outlines directly to a given background bitmap, and even perform translucency.</p>
<hr>
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<div class="section">
<h3 id="FT_Raster_Params">FT_Raster_Params</h3>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Raster_Params_
{
<span class="keyword">const</span> <a href="ft2-basic_types.html#FT_Bitmap">FT_Bitmap</a>* target;
<span class="keyword">const</span> <span class="keyword">void</span>* source;
<span class="keyword">int</span> flags;
<a href="ft2-raster.html#FT_SpanFunc">FT_SpanFunc</a> gray_spans;
<a href="ft2-raster.html#FT_SpanFunc">FT_SpanFunc</a> black_spans; /* unused */
<a href="ft2-raster.html#FT_Raster_BitTest_Func">FT_Raster_BitTest_Func</a> bit_test; /* unused */
<a href="ft2-raster.html#FT_Raster_BitSet_Func">FT_Raster_BitSet_Func</a> bit_set; /* unused */
<span class="keyword">void</span>* user;
<a href="ft2-basic_types.html#FT_BBox">FT_BBox</a> clip_box;
} <b>FT_Raster_Params</b>;
</pre>
<p>A structure to hold the arguments used by a raster's render function.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="target">target</td><td class="desc">
<p>The target bitmap.</p>
</td></tr>
<tr><td class="val" id="source">source</td><td class="desc">
<p>A pointer to the source glyph image (e.g., an <a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a>).</p>
</td></tr>
<tr><td class="val" id="flags">flags</td><td class="desc">
<p>The rendering flags.</p>
</td></tr>
<tr><td class="val" id="gray_spans">gray_spans</td><td class="desc">
<p>The gray span drawing callback.</p>
</td></tr>
<tr><td class="val" id="black_spans">black_spans</td><td class="desc">
<p>Unused.</p>
</td></tr>
<tr><td class="val" id="bit_test">bit_test</td><td class="desc">
<p>Unused.</p>
</td></tr>
<tr><td class="val" id="bit_set">bit_set</td><td class="desc">
<p>Unused.</p>
</td></tr>
<tr><td class="val" id="user">user</td><td class="desc">
<p>User-supplied data that is passed to each drawing callback.</p>
</td></tr>
<tr><td class="val" id="clip_box">clip_box</td><td class="desc">
<p>An optional clipping box. It is only used in direct rendering mode. Note that coordinates here should be expressed in <i>integer</i> pixels (and not in 26.6 fixed-point units).</p>
</td></tr>
</table>
<h4>note</h4>
<p>An anti-aliased glyph bitmap is drawn if the <a href="ft2-raster.html#FT_RASTER_FLAG_XXX">FT_RASTER_FLAG_AA</a> bit flag is set in the &lsquo;flags&rsquo; field, otherwise a monochrome bitmap is generated.</p>
<p>If the <a href="ft2-raster.html#FT_RASTER_FLAG_XXX">FT_RASTER_FLAG_DIRECT</a> bit flag is set in &lsquo;flags&rsquo;, the raster will call the &lsquo;gray_spans&rsquo; callback to draw gray pixel spans. This allows direct composition over a pre-existing bitmap through user-provided callbacks to perform the span drawing and composition. Not supported by the monochrome rasterizer.</p>
<hr>
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<div class="section">
<h3 id="FT_RASTER_FLAG_XXX">FT_RASTER_FLAG_XXX</h3>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<pre>
#define <a href="ft2-raster.html#FT_RASTER_FLAG_DEFAULT">FT_RASTER_FLAG_DEFAULT</a> 0x0
#define <a href="ft2-raster.html#FT_RASTER_FLAG_AA">FT_RASTER_FLAG_AA</a> 0x1
#define <a href="ft2-raster.html#FT_RASTER_FLAG_DIRECT">FT_RASTER_FLAG_DIRECT</a> 0x2
#define <a href="ft2-raster.html#FT_RASTER_FLAG_CLIP">FT_RASTER_FLAG_CLIP</a> 0x4
/* these constants are deprecated; use the corresponding */
/* `<b>FT_RASTER_FLAG_XXX</b>' values instead */
#define ft_raster_flag_default <a href="ft2-raster.html#FT_RASTER_FLAG_DEFAULT">FT_RASTER_FLAG_DEFAULT</a>
#define ft_raster_flag_aa <a href="ft2-raster.html#FT_RASTER_FLAG_AA">FT_RASTER_FLAG_AA</a>
#define ft_raster_flag_direct <a href="ft2-raster.html#FT_RASTER_FLAG_DIRECT">FT_RASTER_FLAG_DIRECT</a>
#define ft_raster_flag_clip <a href="ft2-raster.html#FT_RASTER_FLAG_CLIP">FT_RASTER_FLAG_CLIP</a>
</pre>
<p>A list of bit flag constants as used in the &lsquo;flags&rsquo; field of a <a href="ft2-raster.html#FT_Raster_Params">FT_Raster_Params</a> structure.</p>
<h4>values</h4>
<table class="fields">
<tr><td class="val" id="FT_RASTER_FLAG_DEFAULT">FT_RASTER_FLAG_DEFAULT</td><td class="desc">
<p>This value is 0.</p>
</td></tr>
<tr><td class="val" id="FT_RASTER_FLAG_AA">FT_RASTER_FLAG_AA</td><td class="desc">
<p>This flag is set to indicate that an anti-aliased glyph image should be generated. Otherwise, it will be monochrome (1-bit).</p>
</td></tr>
<tr><td class="val" id="FT_RASTER_FLAG_DIRECT">FT_RASTER_FLAG_DIRECT</td><td class="desc">
<p>This flag is set to indicate direct rendering. In this mode, client applications must provide their own span callback. This lets them directly draw or compose over an existing bitmap. If this bit is not set, the target pixmap's buffer <i>must</i> be zeroed before rendering.</p>
<p>Direct rendering is only possible with anti-aliased glyphs.</p>
</td></tr>
<tr><td class="val" id="FT_RASTER_FLAG_CLIP">FT_RASTER_FLAG_CLIP</td><td class="desc">
<p>This flag is only used in direct rendering mode. If set, the output will be clipped to a box specified in the &lsquo;clip_box&rsquo; field of the <a href="ft2-raster.html#FT_Raster_Params">FT_Raster_Params</a> structure.</p>
<p>Note that by default, the glyph bitmap is clipped to the target pixmap, except in direct rendering mode where all spans are generated if no clipping box is set.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Raster_NewFunc">FT_Raster_NewFunc</h3>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">int</span>
(*<b>FT_Raster_NewFunc</b>)( <span class="keyword">void</span>* memory,
<a href="ft2-raster.html#FT_Raster">FT_Raster</a>* raster );
#define FT_Raster_New_Func <b>FT_Raster_NewFunc</b>
</pre>
<p>A function used to create a new raster object.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="memory">memory</td><td class="desc">
<p>A handle to the memory allocator.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="raster">raster</td><td class="desc">
<p>A handle to the new raster object.</p>
</td></tr>
</table>
<h4>return</h4>
<p>Error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>The &lsquo;memory&rsquo; parameter is a typeless pointer in order to avoid un-wanted dependencies on the rest of the FreeType code. In practice, it is an <a href="ft2-system_interface.html#FT_Memory">FT_Memory</a> object, i.e., a handle to the standard FreeType memory allocator. However, this field can be completely ignored by a given raster implementation.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Raster_DoneFunc">FT_Raster_DoneFunc</h3>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">void</span>
(*<b>FT_Raster_DoneFunc</b>)( <a href="ft2-raster.html#FT_Raster">FT_Raster</a> raster );
#define FT_Raster_Done_Func <b>FT_Raster_DoneFunc</b>
</pre>
<p>A function used to destroy a given raster object.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="raster">raster</td><td class="desc">
<p>A handle to the raster object.</p>
</td></tr>
</table>
<hr>
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<div class="section">
<h3 id="FT_Raster_ResetFunc">FT_Raster_ResetFunc</h3>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">void</span>
(*<b>FT_Raster_ResetFunc</b>)( <a href="ft2-raster.html#FT_Raster">FT_Raster</a> raster,
<span class="keyword">unsigned</span> <span class="keyword">char</span>* pool_base,
<span class="keyword">unsigned</span> <span class="keyword">long</span> pool_size );
#define FT_Raster_Reset_Func <b>FT_Raster_ResetFunc</b>
</pre>
<p>FreeType used to provide an area of memory called the &lsquo;render pool&rsquo; available to all registered rasterizers. This was not thread safe, however, and now FreeType never allocates this pool.</p>
<p>This function is called after a new raster object is created.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="raster">raster</td><td class="desc">
<p>A handle to the new raster object.</p>
</td></tr>
<tr><td class="val" id="pool_base">pool_base</td><td class="desc">
<p>Previously, the address in memory of the render pool. Set this to NULL.</p>
</td></tr>
<tr><td class="val" id="pool_size">pool_size</td><td class="desc">
<p>Previously, the size in bytes of the render pool. Set this to 0.</p>
</td></tr>
</table>
<h4>note</h4>
<p>Rasterizers should rely on dynamic or stack allocation if they want to (a handle to the memory allocator is passed to the rasterizer constructor).</p>
<hr>
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<div class="section">
<h3 id="FT_Raster_SetModeFunc">FT_Raster_SetModeFunc</h3>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">int</span>
(*<b>FT_Raster_SetModeFunc</b>)( <a href="ft2-raster.html#FT_Raster">FT_Raster</a> raster,
<span class="keyword">unsigned</span> <span class="keyword">long</span> mode,
<span class="keyword">void</span>* args );
#define FT_Raster_Set_Mode_Func <b>FT_Raster_SetModeFunc</b>
</pre>
<p>This function is a generic facility to change modes or attributes in a given raster. This can be used for debugging purposes, or simply to allow implementation-specific &lsquo;features&rsquo; in a given raster module.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="raster">raster</td><td class="desc">
<p>A handle to the new raster object.</p>
</td></tr>
<tr><td class="val" id="mode">mode</td><td class="desc">
<p>A 4-byte tag used to name the mode or property.</p>
</td></tr>
<tr><td class="val" id="args">args</td><td class="desc">
<p>A pointer to the new mode/property to use.</p>
</td></tr>
</table>
<hr>
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<div class="section">
<h3 id="FT_Raster_RenderFunc">FT_Raster_RenderFunc</h3>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">int</span>
(*<b>FT_Raster_RenderFunc</b>)( <a href="ft2-raster.html#FT_Raster">FT_Raster</a> raster,
<span class="keyword">const</span> <a href="ft2-raster.html#FT_Raster_Params">FT_Raster_Params</a>* params );
#define FT_Raster_Render_Func <b>FT_Raster_RenderFunc</b>
</pre>
<p>Invoke a given raster to scan-convert a given glyph image into a target bitmap.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="raster">raster</td><td class="desc">
<p>A handle to the raster object.</p>
</td></tr>
<tr><td class="val" id="params">params</td><td class="desc">
<p>A pointer to an <a href="ft2-raster.html#FT_Raster_Params">FT_Raster_Params</a> structure used to store the rendering parameters.</p>
</td></tr>
</table>
<h4>return</h4>
<p>Error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>The exact format of the source image depends on the raster's glyph format defined in its <a href="ft2-raster.html#FT_Raster_Funcs">FT_Raster_Funcs</a> structure. It can be an <a href="ft2-outline_processing.html#FT_Outline">FT_Outline</a> or anything else in order to support a large array of glyph formats.</p>
<p>Note also that the render function can fail and return a &lsquo;FT_Err_Unimplemented_Feature&rsquo; error code if the raster used does not support direct composition.</p>
<p>XXX: For now, the standard raster doesn't support direct composition but this should change for the final release (see the files &lsquo;demos/src/ftgrays.c&rsquo; and &lsquo;demos/src/ftgrays2.c&rsquo; for examples of distinct implementations that support direct composition).</p>
<hr>
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<div class="section">
<h3 id="FT_Raster_Funcs">FT_Raster_Funcs</h3>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Raster_Funcs_
{
<a href="ft2-basic_types.html#FT_Glyph_Format">FT_Glyph_Format</a> glyph_format;
<a href="ft2-raster.html#FT_Raster_NewFunc">FT_Raster_NewFunc</a> raster_new;
<a href="ft2-raster.html#FT_Raster_ResetFunc">FT_Raster_ResetFunc</a> raster_reset;
<a href="ft2-raster.html#FT_Raster_SetModeFunc">FT_Raster_SetModeFunc</a> raster_set_mode;
<a href="ft2-raster.html#FT_Raster_RenderFunc">FT_Raster_RenderFunc</a> raster_render;
<a href="ft2-raster.html#FT_Raster_DoneFunc">FT_Raster_DoneFunc</a> raster_done;
} <b>FT_Raster_Funcs</b>;
</pre>
<p>A structure used to describe a given raster class to the library.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="glyph_format">glyph_format</td><td class="desc">
<p>The supported glyph format for this raster.</p>
</td></tr>
<tr><td class="val" id="raster_new">raster_new</td><td class="desc">
<p>The raster constructor.</p>
</td></tr>
<tr><td class="val" id="raster_reset">raster_reset</td><td class="desc">
<p>Used to reset the render pool within the raster.</p>
</td></tr>
<tr><td class="val" id="raster_render">raster_render</td><td class="desc">
<p>A function to render a glyph into a given bitmap.</p>
</td></tr>
<tr><td class="val" id="raster_done">raster_done</td><td class="desc">
<p>The raster destructor.</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Raster_BitTest_Func">FT_Raster_BitTest_Func</h3>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">int</span>
(*<b>FT_Raster_BitTest_Func</b>)( <span class="keyword">int</span> y,
<span class="keyword">int</span> x,
<span class="keyword">void</span>* user );
</pre>
<p>Deprecated, unimplemented.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Raster_BitSet_Func">FT_Raster_BitSet_Func</h3>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">void</span>
(*<b>FT_Raster_BitSet_Func</b>)( <span class="keyword">int</span> y,
<span class="keyword">int</span> x,
<span class="keyword">void</span>* user );
</pre>
<p>Deprecated, unimplemented.</p>
<hr>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="sfnt_names">SFNT Names</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_SfntName">FT_SfntName</a></td></tr>
<tr><td><a href="#FT_Get_Sfnt_Name_Count">FT_Get_Sfnt_Name_Count</a></td></tr>
<tr><td><a href="#FT_Get_Sfnt_Name">FT_Get_Sfnt_Name</a></td></tr>
<tr><td><a href="#FT_SfntLangTag">FT_SfntLangTag</a></td></tr>
<tr><td><a href="#FT_Get_Sfnt_LangTag">FT_Get_Sfnt_LangTag</a></td></tr>
<tr><td><a href="#FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY">FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY</a></td></tr>
<tr><td><a href="#FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY">FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY</a></td></tr>
</table>
<p>The TrueType and OpenType specifications allow the inclusion of a special names table (&lsquo;name&rsquo;) in font files. This table contains textual (and internationalized) information regarding the font, like family name, copyright, version, etc.</p>
<p>The definitions below are used to access them if available.</p>
<p>Note that this has nothing to do with glyph names!</p>
<div class="section">
<h3 id="FT_SfntName">FT_SfntName</h3>
<p>Defined in FT_SFNT_NAMES_H (freetype/ftsnames.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_SfntName_
{
<a href="ft2-basic_types.html#FT_UShort">FT_UShort</a> platform_id;
<a href="ft2-basic_types.html#FT_UShort">FT_UShort</a> encoding_id;
<a href="ft2-basic_types.html#FT_UShort">FT_UShort</a> language_id;
<a href="ft2-basic_types.html#FT_UShort">FT_UShort</a> name_id;
<a href="ft2-basic_types.html#FT_Byte">FT_Byte</a>* string; /* this string is *not* null-terminated! */
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> string_len; /* in bytes */
} <b>FT_SfntName</b>;
</pre>
<p>A structure used to model an SFNT &lsquo;name&rsquo; table entry.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="platform_id">platform_id</td><td class="desc">
<p>The platform ID for &lsquo;string&rsquo;. See <a href="ft2-truetype_tables.html#TT_PLATFORM_XXX">TT_PLATFORM_XXX</a> for possible values.</p>
</td></tr>
<tr><td class="val" id="encoding_id">encoding_id</td><td class="desc">
<p>The encoding ID for &lsquo;string&rsquo;. See <a href="ft2-truetype_tables.html#TT_APPLE_ID_XXX">TT_APPLE_ID_XXX</a>, <a href="ft2-truetype_tables.html#TT_MAC_ID_XXX">TT_MAC_ID_XXX</a>, <a href="ft2-truetype_tables.html#TT_ISO_ID_XXX">TT_ISO_ID_XXX</a>, <a href="ft2-truetype_tables.html#TT_MS_ID_XXX">TT_MS_ID_XXX</a>, and <a href="ft2-truetype_tables.html#TT_ADOBE_ID_XXX">TT_ADOBE_ID_XXX</a> for possible values.</p>
</td></tr>
<tr><td class="val" id="language_id">language_id</td><td class="desc">
<p>The language ID for &lsquo;string&rsquo;. See <a href="ft2-truetype_tables.html#TT_MAC_LANGID_XXX">TT_MAC_LANGID_XXX</a> and <a href="ft2-truetype_tables.html#TT_MS_LANGID_XXX">TT_MS_LANGID_XXX</a> for possible values.</p>
<p>Registered OpenType values for &lsquo;language_id&rsquo; are always smaller than 0x8000; values equal or larger than 0x8000 usually indicate a language tag string (introduced in OpenType version 1.6). Use function <a href="ft2-sfnt_names.html#FT_Get_Sfnt_LangTag">FT_Get_Sfnt_LangTag</a> with &lsquo;language_id&rsquo; as its argument to retrieve the associated language tag.</p>
</td></tr>
<tr><td class="val" id="name_id">name_id</td><td class="desc">
<p>An identifier for &lsquo;string&rsquo;. See <a href="ft2-truetype_tables.html#TT_NAME_ID_XXX">TT_NAME_ID_XXX</a> for possible values.</p>
</td></tr>
<tr><td class="val" id="string">string</td><td class="desc">
<p>The &lsquo;name&rsquo; string. Note that its format differs depending on the (platform,encoding) pair, being either a string of bytes (without a terminating NULL byte) or containing UTF-16BE entities.</p>
</td></tr>
<tr><td class="val" id="string_len">string_len</td><td class="desc">
<p>The length of &lsquo;string&rsquo; in bytes.</p>
</td></tr>
</table>
<h4>note</h4>
<p>Please refer to the TrueType or OpenType specification for more details.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Get_Sfnt_Name_Count">FT_Get_Sfnt_Name_Count</h3>
<p>Defined in FT_SFNT_NAMES_H (freetype/ftsnames.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> )
<b>FT_Get_Sfnt_Name_Count</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face );
</pre>
<p>Retrieve the number of name strings in the SFNT &lsquo;name&rsquo; table.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to the source face.</p>
</td></tr>
</table>
<h4>return</h4>
<p>The number of strings in the &lsquo;name&rsquo; table.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Get_Sfnt_Name">FT_Get_Sfnt_Name</h3>
<p>Defined in FT_SFNT_NAMES_H (freetype/ftsnames.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Get_Sfnt_Name</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> idx,
<a href="ft2-sfnt_names.html#FT_SfntName">FT_SfntName</a> *aname );
</pre>
<p>Retrieve a string of the SFNT &lsquo;name&rsquo; table for a given index.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to the source face.</p>
</td></tr>
<tr><td class="val" id="idx">idx</td><td class="desc">
<p>The index of the &lsquo;name&rsquo; string.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="aname">aname</td><td class="desc">
<p>The indexed <a href="ft2-sfnt_names.html#FT_SfntName">FT_SfntName</a> structure.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>The &lsquo;string&rsquo; array returned in the &lsquo;aname&rsquo; structure is not null-terminated. Note that you don't have to deallocate &lsquo;string&rsquo; by yourself; FreeType takes care of it if you call <a href="ft2-base_interface.html#FT_Done_Face">FT_Done_Face</a>.</p>
<p>Use <a href="ft2-sfnt_names.html#FT_Get_Sfnt_Name_Count">FT_Get_Sfnt_Name_Count</a> to get the total number of available &lsquo;name&rsquo; table entries, then do a loop until you get the right platform, encoding, and name ID.</p>
<p>&lsquo;name&rsquo; table format&nbsp;1 entries can use language tags also, see <a href="ft2-sfnt_names.html#FT_Get_Sfnt_LangTag">FT_Get_Sfnt_LangTag</a>.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_SfntLangTag">FT_SfntLangTag</h3>
<p>Defined in FT_SFNT_NAMES_H (freetype/ftsnames.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_SfntLangTag_
{
<a href="ft2-basic_types.html#FT_Byte">FT_Byte</a>* string; /* this string is *not* null-terminated! */
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> string_len; /* in bytes */
} <b>FT_SfntLangTag</b>;
</pre>
<p>A structure to model a language tag entry from an SFNT &lsquo;name&rsquo; table.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="string">string</td><td class="desc">
<p>The language tag string, encoded in UTF-16BE (without trailing NULL bytes).</p>
</td></tr>
<tr><td class="val" id="string_len">string_len</td><td class="desc">
<p>The length of &lsquo;string&rsquo; in <b>bytes</b>.</p>
</td></tr>
</table>
<h4>note</h4>
<p>Please refer to the TrueType or OpenType specification for more details.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Get_Sfnt_LangTag">FT_Get_Sfnt_LangTag</h3>
<p>Defined in FT_SFNT_NAMES_H (freetype/ftsnames.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Get_Sfnt_LangTag</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> langID,
<a href="ft2-sfnt_names.html#FT_SfntLangTag">FT_SfntLangTag</a> *alangTag );
</pre>
<p>Retrieve the language tag associated with a language ID of an SFNT &lsquo;name&rsquo; table entry.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to the source face.</p>
</td></tr>
<tr><td class="val" id="langID">langID</td><td class="desc">
<p>The language ID, as returned by <a href="ft2-sfnt_names.html#FT_Get_Sfnt_Name">FT_Get_Sfnt_Name</a>. This is always a value larger than 0x8000.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="alangTag">alangTag</td><td class="desc">
<p>The language tag associated with the &lsquo;name&rsquo; table entry's language ID.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>The &lsquo;string&rsquo; array returned in the &lsquo;alangTag&rsquo; structure is not null-terminated. Note that you don't have to deallocate &lsquo;string&rsquo; by yourself; FreeType takes care of it if you call <a href="ft2-base_interface.html#FT_Done_Face">FT_Done_Face</a>.</p>
<p>Only &lsquo;name&rsquo; table format&nbsp;1 supports language tags. For format&nbsp;0 tables, this function always returns FT_Err_Invalid_Table. For invalid format&nbsp;1 language ID values, FT_Err_Invalid_Argument is returned.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY">FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY</h3>
<p>Defined in FT_SFNT_NAMES_H (freetype/ftsnames.h).</p>
<pre>
#define <b>FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY</b> \
<a href="ft2-basic_types.html#FT_MAKE_TAG">FT_MAKE_TAG</a>( 'i', 'g', 'p', 'f' )
/* this constant is deprecated */
#define FT_PARAM_TAG_IGNORE_PREFERRED_FAMILY \
<b>FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY</b>
</pre>
<p>A tag for <a href="ft2-base_interface.html#FT_Parameter">FT_Parameter</a> to make <a href="ft2-base_interface.html#FT_Open_Face">FT_Open_Face</a> ignore typographic family names in the &lsquo;name&rsquo; table (introduced in OpenType version 1.4). Use this for backward compatibility with legacy systems that have a four-faces-per-family restriction.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY">FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY</h3>
<p>Defined in FT_SFNT_NAMES_H (freetype/ftsnames.h).</p>
<pre>
#define <b>FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY</b> \
<a href="ft2-basic_types.html#FT_MAKE_TAG">FT_MAKE_TAG</a>( 'i', 'g', 'p', 's' )
/* this constant is deprecated */
#define FT_PARAM_TAG_IGNORE_PREFERRED_SUBFAMILY \
<b>FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY</b>
</pre>
<p>A tag for <a href="ft2-base_interface.html#FT_Parameter">FT_Parameter</a> to make <a href="ft2-base_interface.html#FT_Open_Face">FT_Open_Face</a> ignore typographic subfamily names in the &lsquo;name&rsquo; table (introduced in OpenType version 1.4). Use this for backward compatibility with legacy systems that have a four-faces-per-family restriction.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
</body>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="sizes_management">Size Management</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_New_Size">FT_New_Size</a></td><td><a href="#FT_Done_Size">FT_Done_Size</a></td><td><a href="#FT_Activate_Size">FT_Activate_Size</a></td><td></td></tr>
</table>
<p>When creating a new face object (e.g., with <a href="ft2-base_interface.html#FT_New_Face">FT_New_Face</a>), an <a href="ft2-base_interface.html#FT_Size">FT_Size</a> object is automatically created and used to store all pixel-size dependent information, available in the &lsquo;face-&gt;size&rsquo; field.</p>
<p>It is however possible to create more sizes for a given face, mostly in order to manage several character pixel sizes of the same font family and style. See <a href="ft2-sizes_management.html#FT_New_Size">FT_New_Size</a> and <a href="ft2-sizes_management.html#FT_Done_Size">FT_Done_Size</a>.</p>
<p>Note that <a href="ft2-base_interface.html#FT_Set_Pixel_Sizes">FT_Set_Pixel_Sizes</a> and <a href="ft2-base_interface.html#FT_Set_Char_Size">FT_Set_Char_Size</a> only modify the contents of the current &lsquo;active&rsquo; size; you thus need to use <a href="ft2-sizes_management.html#FT_Activate_Size">FT_Activate_Size</a> to change it.</p>
<p>99% of applications won't need the functions provided here, especially if they use the caching sub-system, so be cautious when using these.</p>
<div class="section">
<h3 id="FT_New_Size">FT_New_Size</h3>
<p>Defined in FT_SIZES_H (freetype/ftsizes.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_New_Size</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-base_interface.html#FT_Size">FT_Size</a>* size );
</pre>
<p>Create a new size object from a given face object.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to a parent face object.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="asize">asize</td><td class="desc">
<p>A handle to a new size object.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>You need to call <a href="ft2-sizes_management.html#FT_Activate_Size">FT_Activate_Size</a> in order to select the new size for upcoming calls to <a href="ft2-base_interface.html#FT_Set_Pixel_Sizes">FT_Set_Pixel_Sizes</a>, <a href="ft2-base_interface.html#FT_Set_Char_Size">FT_Set_Char_Size</a>, <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a>, <a href="ft2-base_interface.html#FT_Load_Char">FT_Load_Char</a>, etc.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Done_Size">FT_Done_Size</h3>
<p>Defined in FT_SIZES_H (freetype/ftsizes.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Done_Size</b>( <a href="ft2-base_interface.html#FT_Size">FT_Size</a> size );
</pre>
<p>Discard a given size object. Note that <a href="ft2-base_interface.html#FT_Done_Face">FT_Done_Face</a> automatically discards all size objects allocated with <a href="ft2-sizes_management.html#FT_New_Size">FT_New_Size</a>.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="size">size</td><td class="desc">
<p>A handle to a target size object.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<hr>
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<div class="section">
<h3 id="FT_Activate_Size">FT_Activate_Size</h3>
<p>Defined in FT_SIZES_H (freetype/ftsizes.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Activate_Size</b>( <a href="ft2-base_interface.html#FT_Size">FT_Size</a> size );
</pre>
<p>Even though it is possible to create several size objects for a given face (see <a href="ft2-sizes_management.html#FT_New_Size">FT_New_Size</a> for details), functions like <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a> or <a href="ft2-base_interface.html#FT_Load_Char">FT_Load_Char</a> only use the one that has been activated last to determine the &lsquo;current character pixel size&rsquo;.</p>
<p>This function can be used to &lsquo;activate&rsquo; a previously created size object.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="size">size</td><td class="desc">
<p>A handle to a target size object.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>If &lsquo;face&rsquo; is the size's parent face object, this function changes the value of &lsquo;face-&gt;size&rsquo; to the input size handle.</p>
<hr>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="system_interface">System Interface</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_Memory">FT_Memory</a></td><td><a href="#FT_MemoryRec">FT_MemoryRec</a></td><td><a href="#FT_Stream_CloseFunc">FT_Stream_CloseFunc</a></td></tr>
<tr><td><a href="#FT_Alloc_Func">FT_Alloc_Func</a></td><td><a href="#FT_Stream">FT_Stream</a></td><td><a href="#FT_StreamRec">FT_StreamRec</a></td></tr>
<tr><td><a href="#FT_Free_Func">FT_Free_Func</a></td><td><a href="#FT_StreamDesc">FT_StreamDesc</a></td><td></td></tr>
<tr><td><a href="#FT_Realloc_Func">FT_Realloc_Func</a></td><td><a href="#FT_Stream_IoFunc">FT_Stream_IoFunc</a></td><td></td></tr>
</table>
<p>This section contains various definitions related to memory management and i/o access. You need to understand this information if you want to use a custom memory manager or you own i/o streams.</p>
<div class="section">
<h3 id="FT_Memory">FT_Memory</h3>
<p>Defined in FT_SYSTEM_H (freetype/ftsystem.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_MemoryRec_* <b>FT_Memory</b>;
</pre>
<p>A handle to a given memory manager object, defined with an <a href="ft2-system_interface.html#FT_MemoryRec">FT_MemoryRec</a> structure.</p>
<hr>
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<div class="section">
<h3 id="FT_Alloc_Func">FT_Alloc_Func</h3>
<p>Defined in FT_SYSTEM_H (freetype/ftsystem.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">void</span>*
(*<b>FT_Alloc_Func</b>)( <a href="ft2-system_interface.html#FT_Memory">FT_Memory</a> memory,
<span class="keyword">long</span> size );
</pre>
<p>A function used to allocate &lsquo;size&rsquo; bytes from &lsquo;memory&rsquo;.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="memory">memory</td><td class="desc">
<p>A handle to the source memory manager.</p>
</td></tr>
<tr><td class="val" id="size">size</td><td class="desc">
<p>The size in bytes to allocate.</p>
</td></tr>
</table>
<h4>return</h4>
<p>Address of new memory block. 0&nbsp;in case of failure.</p>
<hr>
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<div class="section">
<h3 id="FT_Free_Func">FT_Free_Func</h3>
<p>Defined in FT_SYSTEM_H (freetype/ftsystem.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">void</span>
(*<b>FT_Free_Func</b>)( <a href="ft2-system_interface.html#FT_Memory">FT_Memory</a> memory,
<span class="keyword">void</span>* block );
</pre>
<p>A function used to release a given block of memory.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="memory">memory</td><td class="desc">
<p>A handle to the source memory manager.</p>
</td></tr>
<tr><td class="val" id="block">block</td><td class="desc">
<p>The address of the target memory block.</p>
</td></tr>
</table>
<hr>
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<div class="section">
<h3 id="FT_Realloc_Func">FT_Realloc_Func</h3>
<p>Defined in FT_SYSTEM_H (freetype/ftsystem.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">void</span>*
(*<b>FT_Realloc_Func</b>)( <a href="ft2-system_interface.html#FT_Memory">FT_Memory</a> memory,
<span class="keyword">long</span> cur_size,
<span class="keyword">long</span> new_size,
<span class="keyword">void</span>* block );
</pre>
<p>A function used to re-allocate a given block of memory.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="memory">memory</td><td class="desc">
<p>A handle to the source memory manager.</p>
</td></tr>
<tr><td class="val" id="cur_size">cur_size</td><td class="desc">
<p>The block's current size in bytes.</p>
</td></tr>
<tr><td class="val" id="new_size">new_size</td><td class="desc">
<p>The block's requested new size.</p>
</td></tr>
<tr><td class="val" id="block">block</td><td class="desc">
<p>The block's current address.</p>
</td></tr>
</table>
<h4>return</h4>
<p>New block address. 0&nbsp;in case of memory shortage.</p>
<h4>note</h4>
<p>In case of error, the old block must still be available.</p>
<hr>
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<div class="section">
<h3 id="FT_MemoryRec">FT_MemoryRec</h3>
<p>Defined in FT_SYSTEM_H (freetype/ftsystem.h).</p>
<pre>
<span class="keyword">struct</span> FT_MemoryRec_
{
<span class="keyword">void</span>* user;
<a href="ft2-system_interface.html#FT_Alloc_Func">FT_Alloc_Func</a> alloc;
<a href="ft2-system_interface.html#FT_Free_Func">FT_Free_Func</a> free;
<a href="ft2-system_interface.html#FT_Realloc_Func">FT_Realloc_Func</a> realloc;
};
</pre>
<p>A structure used to describe a given memory manager to FreeType&nbsp;2.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="user">user</td><td class="desc">
<p>A generic typeless pointer for user data.</p>
</td></tr>
<tr><td class="val" id="alloc">alloc</td><td class="desc">
<p>A pointer type to an allocation function.</p>
</td></tr>
<tr><td class="val" id="free">free</td><td class="desc">
<p>A pointer type to an memory freeing function.</p>
</td></tr>
<tr><td class="val" id="realloc">realloc</td><td class="desc">
<p>A pointer type to a reallocation function.</p>
</td></tr>
</table>
<hr>
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<div class="section">
<h3 id="FT_Stream">FT_Stream</h3>
<p>Defined in FT_SYSTEM_H (freetype/ftsystem.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_StreamRec_* <b>FT_Stream</b>;
</pre>
<p>A handle to an input stream.</p>
<h4>also</h4>
<p>See <a href="ft2-system_interface.html#FT_StreamRec">FT_StreamRec</a> for the publicly accessible fields of a given stream object.</p>
<hr>
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<div class="section">
<h3 id="FT_StreamDesc">FT_StreamDesc</h3>
<p>Defined in FT_SYSTEM_H (freetype/ftsystem.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">union</span> FT_StreamDesc_
{
<span class="keyword">long</span> value;
<span class="keyword">void</span>* pointer;
} <b>FT_StreamDesc</b>;
</pre>
<p>A union type used to store either a long or a pointer. This is used to store a file descriptor or a &lsquo;FILE*&rsquo; in an input stream.</p>
<hr>
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<div class="section">
<h3 id="FT_Stream_IoFunc">FT_Stream_IoFunc</h3>
<p>Defined in FT_SYSTEM_H (freetype/ftsystem.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">unsigned</span> <span class="keyword">long</span>
(*<b>FT_Stream_IoFunc</b>)( <a href="ft2-system_interface.html#FT_Stream">FT_Stream</a> stream,
<span class="keyword">unsigned</span> <span class="keyword">long</span> offset,
<span class="keyword">unsigned</span> <span class="keyword">char</span>* buffer,
<span class="keyword">unsigned</span> <span class="keyword">long</span> count );
</pre>
<p>A function used to seek and read data from a given input stream.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="stream">stream</td><td class="desc">
<p>A handle to the source stream.</p>
</td></tr>
<tr><td class="val" id="offset">offset</td><td class="desc">
<p>The offset of read in stream (always from start).</p>
</td></tr>
<tr><td class="val" id="buffer">buffer</td><td class="desc">
<p>The address of the read buffer.</p>
</td></tr>
<tr><td class="val" id="count">count</td><td class="desc">
<p>The number of bytes to read from the stream.</p>
</td></tr>
</table>
<h4>return</h4>
<p>The number of bytes effectively read by the stream.</p>
<h4>note</h4>
<p>This function might be called to perform a seek or skip operation with a &lsquo;count&rsquo; of&nbsp;0. A non-zero return value then indicates an error.</p>
<hr>
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<div class="section">
<h3 id="FT_Stream_CloseFunc">FT_Stream_CloseFunc</h3>
<p>Defined in FT_SYSTEM_H (freetype/ftsystem.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">void</span>
(*<b>FT_Stream_CloseFunc</b>)( <a href="ft2-system_interface.html#FT_Stream">FT_Stream</a> stream );
</pre>
<p>A function used to close a given input stream.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="stream">stream</td><td class="desc">
<p>A handle to the target stream.</p>
</td></tr>
</table>
<hr>
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<div class="section">
<h3 id="FT_StreamRec">FT_StreamRec</h3>
<p>Defined in FT_SYSTEM_H (freetype/ftsystem.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_StreamRec_
{
<span class="keyword">unsigned</span> <span class="keyword">char</span>* base;
<span class="keyword">unsigned</span> <span class="keyword">long</span> size;
<span class="keyword">unsigned</span> <span class="keyword">long</span> pos;
<a href="ft2-system_interface.html#FT_StreamDesc">FT_StreamDesc</a> descriptor;
<a href="ft2-system_interface.html#FT_StreamDesc">FT_StreamDesc</a> pathname;
<a href="ft2-system_interface.html#FT_Stream_IoFunc">FT_Stream_IoFunc</a> read;
<a href="ft2-system_interface.html#FT_Stream_CloseFunc">FT_Stream_CloseFunc</a> close;
<a href="ft2-system_interface.html#FT_Memory">FT_Memory</a> memory;
<span class="keyword">unsigned</span> <span class="keyword">char</span>* cursor;
<span class="keyword">unsigned</span> <span class="keyword">char</span>* limit;
} <b>FT_StreamRec</b>;
</pre>
<p>A structure used to describe an input stream.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="base">base</td><td class="desc">
<p>For memory-based streams, this is the address of the first stream byte in memory. This field should always be set to NULL for disk-based streams.</p>
</td></tr>
<tr><td class="val" id="size">size</td><td class="desc">
<p>The stream size in bytes.</p>
<p>In case of compressed streams where the size is unknown before actually doing the decompression, the value is set to 0x7FFFFFFF. (Note that this size value can occur for normal streams also; it is thus just a hint.)</p>
</td></tr>
<tr><td class="val" id="pos">pos</td><td class="desc">
<p>The current position within the stream.</p>
</td></tr>
<tr><td class="val" id="descriptor">descriptor</td><td class="desc">
<p>This field is a union that can hold an integer or a pointer. It is used by stream implementations to store file descriptors or &lsquo;FILE*&rsquo; pointers.</p>
</td></tr>
<tr><td class="val" id="pathname">pathname</td><td class="desc">
<p>This field is completely ignored by FreeType. However, it is often useful during debugging to use it to store the stream's filename (where available).</p>
</td></tr>
<tr><td class="val" id="read">read</td><td class="desc">
<p>The stream's input function.</p>
</td></tr>
<tr><td class="val" id="close">close</td><td class="desc">
<p>The stream's close function.</p>
</td></tr>
<tr><td class="val" id="memory">memory</td><td class="desc">
<p>The memory manager to use to preload frames. This is set internally by FreeType and shouldn't be touched by stream implementations.</p>
</td></tr>
<tr><td class="val" id="cursor">cursor</td><td class="desc">
<p>This field is set and used internally by FreeType when parsing frames.</p>
</td></tr>
<tr><td class="val" id="limit">limit</td><td class="desc">
<p>This field is set and used internally by FreeType when parsing frames.</p>
</td></tr>
</table>
<hr>
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<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td></tr></table>
<h1>FreeType-2.8.1 API Reference</h1>
<h1>Table of Contents</h1>
<div class="section">
<h2>General Remarks</h2>
<table class="toc">
<tr><td class="link"><a href="ft2-header_inclusion.html">FreeType's header inclusion scheme</a></td><td class="desc">
<p>How client applications should include FreeType header files.</p>
</td></tr>
<tr><td class="link"><a href="ft2-user_allocation.html">User allocation</a></td><td class="desc">
<p>How client applications should allocate FreeType data structures.</p>
</td></tr>
</table>
</div>
<div class="section">
<h2>Core API</h2>
<table class="toc">
<tr><td class="link"><a href="ft2-version.html">FreeType Version</a></td><td class="desc">
<p>Functions and macros related to FreeType versions.</p>
</td></tr>
<tr><td class="link"><a href="ft2-basic_types.html">Basic Data Types</a></td><td class="desc">
<p>The basic data types defined by the library.</p>
</td></tr>
<tr><td class="link"><a href="ft2-base_interface.html">Base Interface</a></td><td class="desc">
<p>The FreeType&nbsp;2 base font interface.</p>
</td></tr>
<tr><td class="link"><a href="ft2-glyph_variants.html">Unicode Variation Sequences</a></td><td class="desc">
<p>The FreeType&nbsp;2 interface to Unicode Variation Sequences (UVS), using the SFNT cmap format&nbsp;14.</p>
</td></tr>
<tr><td class="link"><a href="ft2-glyph_management.html">Glyph Management</a></td><td class="desc">
<p>Generic interface to manage individual glyph data.</p>
</td></tr>
<tr><td class="link"><a href="ft2-mac_specific.html">Mac Specific Interface</a></td><td class="desc">
<p>Only available on the Macintosh.</p>
</td></tr>
<tr><td class="link"><a href="ft2-sizes_management.html">Size Management</a></td><td class="desc">
<p>Managing multiple sizes per face.</p>
</td></tr>
<tr><td class="link"><a href="ft2-header_file_macros.html">Header File Macros</a></td><td class="desc">
<p>Macro definitions used to #include specific header files.</p>
</td></tr>
</table>
</div>
<div class="section">
<h2>Format-Specific API</h2>
<table class="toc">
<tr><td class="link"><a href="ft2-multiple_masters.html">Multiple Masters</a></td><td class="desc">
<p>How to manage Multiple Masters fonts.</p>
</td></tr>
<tr><td class="link"><a href="ft2-truetype_tables.html">TrueType Tables</a></td><td class="desc">
<p>TrueType specific table types and functions.</p>
</td></tr>
<tr><td class="link"><a href="ft2-type1_tables.html">Type 1 Tables</a></td><td class="desc">
<p>Type&nbsp;1 (PostScript) specific font tables.</p>
</td></tr>
<tr><td class="link"><a href="ft2-sfnt_names.html">SFNT Names</a></td><td class="desc">
<p>Access the names embedded in TrueType and OpenType files.</p>
</td></tr>
<tr><td class="link"><a href="ft2-bdf_fonts.html">BDF and PCF Files</a></td><td class="desc">
<p>BDF and PCF specific API.</p>
</td></tr>
<tr><td class="link"><a href="ft2-cid_fonts.html">CID Fonts</a></td><td class="desc">
<p>CID-keyed font specific API.</p>
</td></tr>
<tr><td class="link"><a href="ft2-pfr_fonts.html">PFR Fonts</a></td><td class="desc">
<p>PFR/TrueDoc specific API.</p>
</td></tr>
<tr><td class="link"><a href="ft2-winfnt_fonts.html">Window FNT Files</a></td><td class="desc">
<p>Windows FNT specific API.</p>
</td></tr>
<tr><td class="link"><a href="ft2-font_formats.html">Font Formats</a></td><td class="desc">
<p>Getting the font format.</p>
</td></tr>
<tr><td class="link"><a href="ft2-gasp_table.html">Gasp Table</a></td><td class="desc">
<p>Retrieving TrueType &lsquo;gasp&rsquo; table entries.</p>
</td></tr>
</table>
</div>
<div class="section">
<h2>Controlling FreeType Modules</h2>
<table class="toc">
<tr><td class="link"><a href="ft2-auto_hinter.html">The auto-hinter</a></td><td class="desc">
<p>Controlling the auto-hinting module.</p>
</td></tr>
<tr><td class="link"><a href="ft2-cff_driver.html">The CFF driver</a></td><td class="desc">
<p>Controlling the CFF driver module.</p>
</td></tr>
<tr><td class="link"><a href="ft2-tt_driver.html">The TrueType driver</a></td><td class="desc">
<p>Controlling the TrueType driver module.</p>
</td></tr>
<tr><td class="link"><a href="ft2-pcf_driver.html">The PCF driver</a></td><td class="desc">
<p>Controlling the PCF driver module.</p>
</td></tr>
</table>
</div>
<div class="section">
<h2>Cache Sub-System</h2>
<table class="toc">
<tr><td class="link"><a href="ft2-cache_subsystem.html">Cache Sub-System</a></td><td class="desc">
<p>How to cache face, size, and glyph data with FreeType&nbsp;2.</p>
</td></tr>
</table>
</div>
<div class="section">
<h2>Support API</h2>
<table class="toc">
<tr><td class="link"><a href="ft2-computations.html">Computations</a></td><td class="desc">
<p>Crunching fixed numbers and vectors.</p>
</td></tr>
<tr><td class="link"><a href="ft2-list_processing.html">List Processing</a></td><td class="desc">
<p>Simple management of lists.</p>
</td></tr>
<tr><td class="link"><a href="ft2-outline_processing.html">Outline Processing</a></td><td class="desc">
<p>Functions to create, transform, and render vectorial glyph images.</p>
</td></tr>
<tr><td class="link"><a href="ft2-quick_advance.html">Quick retrieval of advance values</a></td><td class="desc">
<p>Retrieve horizontal and vertical advance values without processing glyph outlines, if possible.</p>
</td></tr>
<tr><td class="link"><a href="ft2-bitmap_handling.html">Bitmap Handling</a></td><td class="desc">
<p>Handling FT_Bitmap objects.</p>
</td></tr>
<tr><td class="link"><a href="ft2-raster.html">Scanline Converter</a></td><td class="desc">
<p>How vectorial outlines are converted into bitmaps and pixmaps.</p>
</td></tr>
<tr><td class="link"><a href="ft2-glyph_stroker.html">Glyph Stroker</a></td><td class="desc">
<p>Generating bordered and stroked glyphs.</p>
</td></tr>
<tr><td class="link"><a href="ft2-system_interface.html">System Interface</a></td><td class="desc">
<p>How FreeType manages memory and i/o.</p>
</td></tr>
<tr><td class="link"><a href="ft2-module_management.html">Module Management</a></td><td class="desc">
<p>How to add, upgrade, remove, and control modules from FreeType.</p>
</td></tr>
<tr><td class="link"><a href="ft2-gzip.html">GZIP Streams</a></td><td class="desc">
<p>Using gzip-compressed font files.</p>
</td></tr>
<tr><td class="link"><a href="ft2-lzw.html">LZW Streams</a></td><td class="desc">
<p>Using LZW-compressed font files.</p>
</td></tr>
<tr><td class="link"><a href="ft2-bzip2.html">BZIP2 Streams</a></td><td class="desc">
<p>Using bzip2-compressed font files.</p>
</td></tr>
<tr><td class="link"><a href="ft2-lcd_filtering.html">LCD Filtering</a></td><td class="desc">
<p>Reduce color fringes of subpixel-rendered bitmaps.</p>
</td></tr>
</table>
</div>
<div class="section">
<h2>Error Codes</h2>
<table class="toc">
<tr><td class="link"><a href="ft2-error_enumerations.html">Error Enumerations</a></td><td class="desc">
<p>How to handle errors and error strings.</p>
</td></tr>
<tr><td class="link"><a href="ft2-error_code_values.html">Error Code Values</a></td><td class="desc">
<p>All possible error codes returned by FreeType functions.</p>
</td></tr>
</table>
</div>
<div class="section">
<h2>Miscellaneous</h2>
<table class="toc">
<tr><td class="link"><a href="ft2-ot_validation.html">OpenType Validation</a></td><td class="desc">
<p>An API to validate OpenType tables.</p>
</td></tr>
<tr><td class="link"><a href="ft2-incremental.html">Incremental Loading</a></td><td class="desc">
<p>Custom Glyph Loading.</p>
</td></tr>
<tr><td class="link"><a href="ft2-truetype_engine.html">The TrueType Engine</a></td><td class="desc">
<p>TrueType bytecode support.</p>
</td></tr>
<tr><td class="link"><a href="ft2-gx_validation.html">TrueTypeGX/AAT Validation</a></td><td class="desc">
<p>An API to validate TrueTypeGX/AAT tables.</p>
</td></tr>
</table>
</div>
<div class="section">
<h2><a href="ft2-index.html">Global Index</a></h2></div>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td></tr></table>
<div class="timestamp">generated on Sat Sep 16 19:09:11 2017</div></body>
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<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table>
<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="truetype_engine">The TrueType Engine</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_TrueTypeEngineType">FT_TrueTypeEngineType</a></td><td><a href="#FT_Get_TrueType_Engine_Type">FT_Get_TrueType_Engine_Type</a></td></tr>
</table>
<p>This section contains a function used to query the level of TrueType bytecode support compiled in this version of the library.</p>
<div class="section">
<h3 id="FT_TrueTypeEngineType">FT_TrueTypeEngineType</h3>
<p>Defined in FT_MODULE_H (freetype/ftmodapi.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">enum</span> FT_TrueTypeEngineType_
{
<a href="ft2-truetype_engine.html#FT_TRUETYPE_ENGINE_TYPE_NONE">FT_TRUETYPE_ENGINE_TYPE_NONE</a> = 0,
<a href="ft2-truetype_engine.html#FT_TRUETYPE_ENGINE_TYPE_UNPATENTED">FT_TRUETYPE_ENGINE_TYPE_UNPATENTED</a>,
<a href="ft2-truetype_engine.html#FT_TRUETYPE_ENGINE_TYPE_PATENTED">FT_TRUETYPE_ENGINE_TYPE_PATENTED</a>
} <b>FT_TrueTypeEngineType</b>;
</pre>
<p>A list of values describing which kind of TrueType bytecode engine is implemented in a given FT_Library instance. It is used by the <a href="ft2-truetype_engine.html#FT_Get_TrueType_Engine_Type">FT_Get_TrueType_Engine_Type</a> function.</p>
<h4>values</h4>
<table class="fields">
<tr><td class="val" id="FT_TRUETYPE_ENGINE_TYPE_NONE">FT_TRUETYPE_ENGINE_TYPE_NONE</td><td class="desc">
<p>The library doesn't implement any kind of bytecode interpreter.</p>
</td></tr>
<tr><td class="val" id="FT_TRUETYPE_ENGINE_TYPE_UNPATENTED">FT_TRUETYPE_ENGINE_TYPE_UNPATENTED</td><td class="desc">
<p>Deprecated and removed.</p>
</td></tr>
<tr><td class="val" id="FT_TRUETYPE_ENGINE_TYPE_PATENTED">FT_TRUETYPE_ENGINE_TYPE_PATENTED</td><td class="desc">
<p>The library implements a bytecode interpreter that covers the full instruction set of the TrueType virtual machine (this was governed by patents until May 2010, hence the name).</p>
</td></tr>
</table>
<h4>since</h4>
<p>2.2</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Get_TrueType_Engine_Type">FT_Get_TrueType_Engine_Type</h3>
<p>Defined in FT_MODULE_H (freetype/ftmodapi.h).</p>
<pre>
FT_EXPORT( <a href="ft2-truetype_engine.html#FT_TrueTypeEngineType">FT_TrueTypeEngineType</a> )
<b>FT_Get_TrueType_Engine_Type</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library );
</pre>
<p>Return an <a href="ft2-truetype_engine.html#FT_TrueTypeEngineType">FT_TrueTypeEngineType</a> value to indicate which level of the TrueType virtual machine a given library instance supports.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="library">library</td><td class="desc">
<p>A library instance.</p>
</td></tr>
</table>
<h4>return</h4>
<p>A value indicating which level is supported.</p>
<h4>since</h4>
<p>2.2</p>
<hr>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="tt_driver">The TrueType driver</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#interpreter-version">interpreter-version</a></td><td><a href="#TT_INTERPRETER_VERSION_XXX">TT_INTERPRETER_VERSION_XXX</a></td></tr>
</table>
<p>While FreeType's TrueType driver doesn't expose API functions by itself, it is possible to control its behaviour with <a href="ft2-module_management.html#FT_Property_Set">FT_Property_Set</a> and <a href="ft2-module_management.html#FT_Property_Get">FT_Property_Get</a>. The following lists the available properties together with the necessary macros and structures.</p>
<p>The TrueType driver's module name is &lsquo;truetype&rsquo;.</p>
<p>We start with a list of definitions, kindly provided by Greg Hitchcock.</p>
<p><i>Bi-Level</i> <i>Rendering</i></p>
<p>Monochromatic rendering, exclusively used in the early days of TrueType by both Apple and Microsoft. Microsoft's GDI interface supported hinting of the right-side bearing point, such that the advance width could be non-linear. Most often this was done to achieve some level of glyph symmetry. To enable reasonable performance (e.g., not having to run hinting on all glyphs just to get the widths) there was a bit in the head table indicating if the side bearing was hinted, and additional tables, &lsquo;hdmx&rsquo; and &lsquo;LTSH&rsquo;, to cache hinting widths across multiple sizes and device aspect ratios.</p>
<p><i>Font</i> <i>Smoothing</i></p>
<p>Microsoft's GDI implementation of anti-aliasing. Not traditional anti-aliasing as the outlines were hinted before the sampling. The widths matched the bi-level rendering.</p>
<p><i>ClearType</i> <i>Rendering</i></p>
<p>Technique that uses physical subpixels to improve rendering on LCD (and other) displays. Because of the higher resolution, many methods of improving symmetry in glyphs through hinting the right-side bearing were no longer necessary. This lead to what GDI calls &lsquo;natural widths&rsquo; ClearType, see <a href="http://www.beatstamm.com/typography/RTRCh4.htm#Sec21">http://www.beatstamm.com/typography/RTRCh4.htm#Sec21</a>. Since hinting has extra resolution, most non-linearity went away, but it is still possible for hints to change the advance widths in this mode.</p>
<p><i>ClearType</i> <i>Compatible</i> <i>Widths</i></p>
<p>One of the earliest challenges with ClearType was allowing the implementation in GDI to be selected without requiring all UI and documents to reflow. To address this, a compatible method of rendering ClearType was added where the font hints are executed once to determine the width in bi-level rendering, and then re-run in ClearType, with the difference in widths being absorbed in the font hints for ClearType (mostly in the white space of hints); see <a href="http://www.beatstamm.com/typography/RTRCh4.htm#Sec20">http://www.beatstamm.com/typography/RTRCh4.htm#Sec20</a>. Somewhat by definition, compatible width ClearType allows for non-linear widths, but only when the bi-level version has non-linear widths.</p>
<p><i>ClearType</i> <i>Subpixel</i> <i>Positioning</i></p>
<p>One of the nice benefits of ClearType is the ability to more crisply display fractional widths; unfortunately, the GDI model of integer bitmaps did not support this. However, the WPF and Direct Write frameworks do support fractional widths. DWrite calls this &lsquo;natural mode&rsquo;, not to be confused with GDI's &lsquo;natural widths&rsquo;. Subpixel positioning, in the current implementation of Direct Write, unfortunately does not support hinted advance widths, see <a href="http://www.beatstamm.com/typography/RTRCh4.htm#Sec22">http://www.beatstamm.com/typography/RTRCh4.htm#Sec22</a>. Note that the TrueType interpreter fully allows the advance width to be adjusted in this mode, just the DWrite client will ignore those changes.</p>
<p><i>ClearType</i> <i>Backward</i> <i>Compatibility</i></p>
<p>This is a set of exceptions made in the TrueType interpreter to minimize hinting techniques that were problematic with the extra resolution of ClearType; see <a href="http://www.beatstamm.com/typography/RTRCh4.htm#Sec1">http://www.beatstamm.com/typography/RTRCh4.htm#Sec1</a> and <a href="http://www.microsoft.com/typography/cleartype/truetypecleartype.aspx">http://www.microsoft.com/typography/cleartype/truetypecleartype.aspx</a>. This technique is not to be confused with ClearType compatible widths. ClearType backward compatibility has no direct impact on changing advance widths, but there might be an indirect impact on disabling some deltas. This could be worked around in backward compatibility mode.</p>
<p><i>Native</i> <i>ClearType</i> <i>Mode</i></p>
<p>(Not to be confused with &lsquo;natural widths&rsquo;.) This mode removes all the exceptions in the TrueType interpreter when running with ClearType. Any issues on widths would still apply, though.</p>
<div class="section">
<h3 id="interpreter-version">interpreter-version</h3>
<p>Currently, three versions are available, two representing the bytecode interpreter with subpixel hinting support (old &lsquo;Infinality&rsquo; code and new stripped-down and higher performance &lsquo;minimal&rsquo; code) and one without, respectively. The default is subpixel support if TT_CONFIG_OPTION_SUBPIXEL_HINTING is defined, and no subpixel support otherwise (since it isn't available then).</p>
<p>If subpixel hinting is on, many TrueType bytecode instructions behave differently compared to B/W or grayscale rendering (except if &lsquo;native ClearType&rsquo; is selected by the font). Microsoft's main idea is to render at a much increased horizontal resolution, then sampling down the created output to subpixel precision. However, many older fonts are not suited to this and must be specially taken care of by applying (hardcoded) tweaks in Microsoft's interpreter.</p>
<p>Details on subpixel hinting and some of the necessary tweaks can be found in Greg Hitchcock's whitepaper at &lsquo;<a href="http://www.microsoft.com/typography/cleartype/truetypecleartype.aspx">http://www.microsoft.com/typography/cleartype/truetypecleartype.aspx</a>&rsquo;. Note that FreeType currently doesn't really &lsquo;subpixel hint&rsquo; (6x1, 6x2, or 6x5 supersampling) like discussed in the paper. Depending on the chosen interpreter, it simply ignores instructions on vertical stems to arrive at very similar results.</p>
<p>The following example code demonstrates how to deactivate subpixel hinting (omitting the error handling).</p>
<pre class="colored">
FT_Library library;
FT_Face face;
FT_UInt interpreter_version = TT_INTERPRETER_VERSION_35;
FT_Init_FreeType( &amp;library );
FT_Property_Set( library, "truetype",
"interpreter-version",
&amp;interpreter_version );
</pre>
<h4>note</h4>
<p>This property can be used with <a href="ft2-module_management.html#FT_Property_Get">FT_Property_Get</a> also.</p>
<p>This property can be set via the &lsquo;FREETYPE_PROPERTIES&rsquo; environment variable (using values &lsquo;35&rsquo;, &lsquo;38&rsquo;, or &lsquo;40&rsquo;).</p>
<hr>
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<div class="section">
<h3 id="TT_INTERPRETER_VERSION_XXX">TT_INTERPRETER_VERSION_XXX</h3>
<p>Defined in FT_TRUETYPE_DRIVER_H (freetype/ftttdrv.h).</p>
<pre>
#define <a href="ft2-tt_driver.html#TT_INTERPRETER_VERSION_35">TT_INTERPRETER_VERSION_35</a> 35
#define <a href="ft2-tt_driver.html#TT_INTERPRETER_VERSION_38">TT_INTERPRETER_VERSION_38</a> 38
#define <a href="ft2-tt_driver.html#TT_INTERPRETER_VERSION_40">TT_INTERPRETER_VERSION_40</a> 40
</pre>
<p>A list of constants used for the <a href="ft2-tt_driver.html#interpreter-version">interpreter-version</a> property to select the hinting engine for Truetype fonts.</p>
<p>The numeric value in the constant names represents the version number as returned by the &lsquo;GETINFO&rsquo; bytecode instruction.</p>
<h4>values</h4>
<table class="fields">
<tr><td class="val" id="TT_INTERPRETER_VERSION_35">TT_INTERPRETER_VERSION_35</td><td class="desc">
<p>Version&nbsp;35 corresponds to MS rasterizer v.1.7 as used e.g. in Windows&nbsp;98; only grayscale and B/W rasterizing is supported.</p>
</td></tr>
<tr><td class="val" id="TT_INTERPRETER_VERSION_38">TT_INTERPRETER_VERSION_38</td><td class="desc">
<p>Version&nbsp;38 corresponds to MS rasterizer v.1.9; it is roughly equivalent to the hinting provided by DirectWrite ClearType (as can be found, for example, in the Internet Explorer&nbsp;9 running on Windows&nbsp;7). It is used in FreeType to select the &lsquo;Infinality&rsquo; subpixel hinting code. The code may be removed in a future version.</p>
</td></tr>
<tr><td class="val" id="TT_INTERPRETER_VERSION_40">TT_INTERPRETER_VERSION_40</td><td class="desc">
<p>Version&nbsp;40 corresponds to MS rasterizer v.2.1; it is roughly equivalent to the hinting provided by DirectWrite ClearType (as can be found, for example, in Microsoft's Edge Browser on Windows&nbsp;10). It is used in FreeType to select the &lsquo;minimal&rsquo; subpixel hinting code, a stripped-down and higher performance version of the &lsquo;Infinality&rsquo; code.</p>
</td></tr>
</table>
<h4>note</h4>
<p>This property controls the behaviour of the bytecode interpreter and thus how outlines get hinted. It does <b>not</b> control how glyph get rasterized! In particular, it does not control subpixel color filtering.</p>
<p>If FreeType has not been compiled with the configuration option TT_CONFIG_OPTION_SUBPIXEL_HINTING, selecting version&nbsp;38 or&nbsp;40 causes an &lsquo;FT_Err_Unimplemented_Feature&rsquo; error.</p>
<p>Depending on the graphics framework, Microsoft uses different bytecode and rendering engines. As a consequence, the version numbers returned by a call to the &lsquo;GETINFO&rsquo; bytecode instruction are more convoluted than desired.</p>
<p>Here are two tables that try to shed some light on the possible values for the MS rasterizer engine, together with the additional features introduced by it.</p>
<pre class="colored">
GETINFO framework version feature
-------------------------------------------------------------------
3 GDI (Win 3.1), v1.0 16-bit, first version
TrueImage
33 GDI (Win NT 3.1), v1.5 32-bit
HP Laserjet
34 GDI (Win 95) v1.6 font smoothing,
new SCANTYPE opcode
35 GDI (Win 98/2000) v1.7 (UN)SCALED_COMPONENT_OFFSET
bits in composite glyphs
36 MGDI (Win CE 2) v1.6+ classic ClearType
37 GDI (XP and later), v1.8 ClearType
GDI+ old (before Vista)
38 GDI+ old (Vista, Win 7), v1.9 subpixel ClearType,
WPF Y-direction ClearType,
additional error checking
39 DWrite (before Win 8) v2.0 subpixel ClearType flags
in GETINFO opcode,
bug fixes
40 GDI+ (after Win 7), v2.1 Y-direction ClearType flag
DWrite (Win 8) in GETINFO opcode,
Gray ClearType
</pre>
<p>The &lsquo;version&rsquo; field gives a rough orientation only, since some applications provided certain features much earlier (as an example, Microsoft Reader used subpixel and Y-direction ClearType already in Windows 2000). Similarly, updates to a given framework might include improved hinting support.</p>
<pre class="colored">
version sampling rendering comment
x y x y
--------------------------------------------------------------
v1.0 normal normal B/W B/W bi-level
v1.6 high high gray gray grayscale
v1.8 high normal color-filter B/W (GDI) ClearType
v1.9 high high color-filter gray Color ClearType
v2.1 high normal gray B/W Gray ClearType
v2.1 high high gray gray Gray ClearType
</pre>
<p>Color and Gray ClearType are the two available variants of &lsquo;Y-direction ClearType&rsquo;, meaning grayscale rasterization along the Y-direction; the name used in the TrueType specification for this feature is &lsquo;symmetric smoothing&rsquo;. &lsquo;Classic ClearType&rsquo; is the original algorithm used before introducing a modified version in Win&nbsp;XP. Another name for v1.6's grayscale rendering is &lsquo;font smoothing&rsquo;, and &lsquo;Color ClearType&rsquo; is sometimes also called &lsquo;DWrite ClearType&rsquo;. To differentiate between today's Color ClearType and the earlier ClearType variant with B/W rendering along the vertical axis, the latter is sometimes called &lsquo;GDI ClearType&rsquo;.</p>
<p>&lsquo;Normal&rsquo; and &lsquo;high&rsquo; sampling describe the (virtual) resolution to access the rasterized outline after the hinting process. &lsquo;Normal&rsquo; means 1 sample per grid line (i.e., B/W). In the current Microsoft implementation, &lsquo;high&rsquo; means an extra virtual resolution of 16x16 (or 16x1) grid lines per pixel for bytecode instructions like &lsquo;MIRP&rsquo;. After hinting, these 16 grid lines are mapped to 6x5 (or 6x1) grid lines for color filtering if Color ClearType is activated.</p>
<p>Note that &lsquo;Gray ClearType&rsquo; is essentially the same as v1.6's grayscale rendering. However, the GETINFO instruction handles it differently: v1.6 returns bit&nbsp;12 (hinting for grayscale), while v2.1 returns bits&nbsp;13 (hinting for ClearType), 18 (symmetrical smoothing), and&nbsp;19 (Gray ClearType). Also, this mode respects bits 2 and&nbsp;3 for the version&nbsp;1 gasp table exclusively (like Color ClearType), while v1.6 only respects the values of version&nbsp;0 (bits 0 and&nbsp;1).</p>
<p>Keep in mind that the features of the above interpreter versions might not map exactly to FreeType features or behavior because it is a fundamentally different library with different internals.</p>
<hr>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="type1_tables">Type 1 Tables</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#PS_FontInfoRec">PS_FontInfoRec</a></td><td><a href="#CID_FaceInfo">CID_FaceInfo</a></td><td><a href="#T1_EncodingType">T1_EncodingType</a></td></tr>
<tr><td><a href="#PS_FontInfo">PS_FontInfo</a></td><td>&nbsp;</td><td><a href="#PS_Dict_Keys">PS_Dict_Keys</a></td></tr>
<tr><td><a href="#PS_PrivateRec">PS_PrivateRec</a></td><td><a href="#FT_Has_PS_Glyph_Names">FT_Has_PS_Glyph_Names</a></td><td>&nbsp;</td></tr>
<tr><td><a href="#PS_Private">PS_Private</a></td><td><a href="#FT_Get_PS_Font_Info">FT_Get_PS_Font_Info</a></td><td><a href="#T1_FontInfo">T1_FontInfo</a></td></tr>
<tr><td>&nbsp;</td><td><a href="#FT_Get_PS_Font_Private">FT_Get_PS_Font_Private</a></td><td><a href="#T1_Private">T1_Private</a></td></tr>
<tr><td><a href="#CID_FaceDictRec">CID_FaceDictRec</a></td><td><a href="#FT_Get_PS_Font_Value">FT_Get_PS_Font_Value</a></td><td><a href="#CID_FontDict">CID_FontDict</a></td></tr>
<tr><td><a href="#CID_FaceDict">CID_FaceDict</a></td><td>&nbsp;</td><td><a href="#CID_Info">CID_Info</a></td></tr>
<tr><td><a href="#CID_FaceInfoRec">CID_FaceInfoRec</a></td><td><a href="#T1_Blend_Flags">T1_Blend_Flags</a></td><td></td></tr>
</table>
<p>This section contains the definition of Type 1-specific tables, including structures related to other PostScript font formats.</p>
<div class="section">
<h3 id="PS_FontInfoRec">PS_FontInfoRec</h3>
<p>Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> PS_FontInfoRec_
{
<a href="ft2-basic_types.html#FT_String">FT_String</a>* version;
<a href="ft2-basic_types.html#FT_String">FT_String</a>* notice;
<a href="ft2-basic_types.html#FT_String">FT_String</a>* full_name;
<a href="ft2-basic_types.html#FT_String">FT_String</a>* family_name;
<a href="ft2-basic_types.html#FT_String">FT_String</a>* weight;
<a href="ft2-basic_types.html#FT_Long">FT_Long</a> italic_angle;
<a href="ft2-basic_types.html#FT_Bool">FT_Bool</a> is_fixed_pitch;
<a href="ft2-basic_types.html#FT_Short">FT_Short</a> underline_position;
<a href="ft2-basic_types.html#FT_UShort">FT_UShort</a> underline_thickness;
} <b>PS_FontInfoRec</b>;
</pre>
<p>A structure used to model a Type&nbsp;1 or Type&nbsp;2 FontInfo dictionary. Note that for Multiple Master fonts, each instance has its own FontInfo dictionary.</p>
<hr>
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<div class="section">
<h3 id="PS_FontInfo">PS_FontInfo</h3>
<p>Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> PS_FontInfoRec_* <b>PS_FontInfo</b>;
</pre>
<p>A handle to a <a href="ft2-type1_tables.html#PS_FontInfoRec">PS_FontInfoRec</a> structure.</p>
<hr>
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<div class="section">
<h3 id="PS_PrivateRec">PS_PrivateRec</h3>
<p>Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> PS_PrivateRec_
{
<a href="ft2-basic_types.html#FT_Int">FT_Int</a> unique_id;
<a href="ft2-basic_types.html#FT_Int">FT_Int</a> lenIV;
<a href="ft2-basic_types.html#FT_Byte">FT_Byte</a> num_blue_values;
<a href="ft2-basic_types.html#FT_Byte">FT_Byte</a> num_other_blues;
<a href="ft2-basic_types.html#FT_Byte">FT_Byte</a> num_family_blues;
<a href="ft2-basic_types.html#FT_Byte">FT_Byte</a> num_family_other_blues;
<a href="ft2-basic_types.html#FT_Short">FT_Short</a> blue_values[14];
<a href="ft2-basic_types.html#FT_Short">FT_Short</a> other_blues[10];
<a href="ft2-basic_types.html#FT_Short">FT_Short</a> family_blues [14];
<a href="ft2-basic_types.html#FT_Short">FT_Short</a> family_other_blues[10];
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> blue_scale;
<a href="ft2-basic_types.html#FT_Int">FT_Int</a> blue_shift;
<a href="ft2-basic_types.html#FT_Int">FT_Int</a> blue_fuzz;
<a href="ft2-basic_types.html#FT_UShort">FT_UShort</a> standard_width[1];
<a href="ft2-basic_types.html#FT_UShort">FT_UShort</a> standard_height[1];
<a href="ft2-basic_types.html#FT_Byte">FT_Byte</a> num_snap_widths;
<a href="ft2-basic_types.html#FT_Byte">FT_Byte</a> num_snap_heights;
<a href="ft2-basic_types.html#FT_Bool">FT_Bool</a> force_bold;
<a href="ft2-basic_types.html#FT_Bool">FT_Bool</a> round_stem_up;
<a href="ft2-basic_types.html#FT_Short">FT_Short</a> snap_widths [13]; /* including std width */
<a href="ft2-basic_types.html#FT_Short">FT_Short</a> snap_heights[13]; /* including std height */
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> expansion_factor;
<a href="ft2-basic_types.html#FT_Long">FT_Long</a> language_group;
<a href="ft2-basic_types.html#FT_Long">FT_Long</a> password;
<a href="ft2-basic_types.html#FT_Short">FT_Short</a> min_feature[2];
} <b>PS_PrivateRec</b>;
</pre>
<p>A structure used to model a Type&nbsp;1 or Type&nbsp;2 private dictionary. Note that for Multiple Master fonts, each instance has its own Private dictionary.</p>
<hr>
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<div class="section">
<h3 id="PS_Private">PS_Private</h3>
<p>Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> PS_PrivateRec_* <b>PS_Private</b>;
</pre>
<p>A handle to a <a href="ft2-type1_tables.html#PS_PrivateRec">PS_PrivateRec</a> structure.</p>
<hr>
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<div class="section">
<h3 id="CID_FaceDictRec">CID_FaceDictRec</h3>
<p>Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> CID_FaceDictRec_
{
<a href="ft2-type1_tables.html#PS_PrivateRec">PS_PrivateRec</a> private_dict;
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> len_buildchar;
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> forcebold_threshold;
<a href="ft2-basic_types.html#FT_Pos">FT_Pos</a> stroke_width;
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> expansion_factor;
<a href="ft2-basic_types.html#FT_Byte">FT_Byte</a> paint_type;
<a href="ft2-basic_types.html#FT_Byte">FT_Byte</a> font_type;
<a href="ft2-basic_types.html#FT_Matrix">FT_Matrix</a> font_matrix;
<a href="ft2-basic_types.html#FT_Vector">FT_Vector</a> font_offset;
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> num_subrs;
<a href="ft2-basic_types.html#FT_ULong">FT_ULong</a> subrmap_offset;
<a href="ft2-basic_types.html#FT_Int">FT_Int</a> sd_bytes;
} <b>CID_FaceDictRec</b>;
</pre>
<p>A structure used to represent data in a CID top-level dictionary.</p>
<hr>
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<div class="section">
<h3 id="CID_FaceDict">CID_FaceDict</h3>
<p>Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> CID_FaceDictRec_* <b>CID_FaceDict</b>;
</pre>
<p>A handle to a <a href="ft2-type1_tables.html#CID_FaceDictRec">CID_FaceDictRec</a> structure.</p>
<hr>
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<div class="section">
<h3 id="CID_FaceInfoRec">CID_FaceInfoRec</h3>
<p>Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> CID_FaceInfoRec_
{
<a href="ft2-basic_types.html#FT_String">FT_String</a>* cid_font_name;
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> cid_version;
<a href="ft2-basic_types.html#FT_Int">FT_Int</a> cid_font_type;
<a href="ft2-basic_types.html#FT_String">FT_String</a>* registry;
<a href="ft2-basic_types.html#FT_String">FT_String</a>* ordering;
<a href="ft2-basic_types.html#FT_Int">FT_Int</a> supplement;
<a href="ft2-type1_tables.html#PS_FontInfoRec">PS_FontInfoRec</a> font_info;
<a href="ft2-basic_types.html#FT_BBox">FT_BBox</a> font_bbox;
<a href="ft2-basic_types.html#FT_ULong">FT_ULong</a> uid_base;
<a href="ft2-basic_types.html#FT_Int">FT_Int</a> num_xuid;
<a href="ft2-basic_types.html#FT_ULong">FT_ULong</a> xuid[16];
<a href="ft2-basic_types.html#FT_ULong">FT_ULong</a> cidmap_offset;
<a href="ft2-basic_types.html#FT_Int">FT_Int</a> fd_bytes;
<a href="ft2-basic_types.html#FT_Int">FT_Int</a> gd_bytes;
<a href="ft2-basic_types.html#FT_ULong">FT_ULong</a> cid_count;
<a href="ft2-basic_types.html#FT_Int">FT_Int</a> num_dicts;
<a href="ft2-type1_tables.html#CID_FaceDict">CID_FaceDict</a> font_dicts;
<a href="ft2-basic_types.html#FT_ULong">FT_ULong</a> data_offset;
} <b>CID_FaceInfoRec</b>;
</pre>
<p>A structure used to represent CID Face information.</p>
<hr>
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<div class="section">
<h3 id="CID_FaceInfo">CID_FaceInfo</h3>
<p>Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> CID_FaceInfoRec_* <b>CID_FaceInfo</b>;
</pre>
<p>A handle to a <a href="ft2-type1_tables.html#CID_FaceInfoRec">CID_FaceInfoRec</a> structure.</p>
<hr>
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<div class="section">
<h3 id="FT_Has_PS_Glyph_Names">FT_Has_PS_Glyph_Names</h3>
<p>Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Int">FT_Int</a> )
<b>FT_Has_PS_Glyph_Names</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face );
</pre>
<p>Return true if a given face provides reliable PostScript glyph names. This is similar to using the <a href="ft2-base_interface.html#FT_HAS_GLYPH_NAMES">FT_HAS_GLYPH_NAMES</a> macro, except that certain fonts (mostly TrueType) contain incorrect glyph name tables.</p>
<p>When this function returns true, the caller is sure that the glyph names returned by <a href="ft2-base_interface.html#FT_Get_Glyph_Name">FT_Get_Glyph_Name</a> are reliable.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>face handle</p>
</td></tr>
</table>
<h4>return</h4>
<p>Boolean. True if glyph names are reliable.</p>
<hr>
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<div class="section">
<h3 id="FT_Get_PS_Font_Info">FT_Get_PS_Font_Info</h3>
<p>Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Get_PS_Font_Info</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-type1_tables.html#PS_FontInfo">PS_FontInfo</a> afont_info );
</pre>
<p>Retrieve the <a href="ft2-type1_tables.html#PS_FontInfoRec">PS_FontInfoRec</a> structure corresponding to a given PostScript font.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>PostScript face handle.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="afont_info">afont_info</td><td class="desc">
<p>Output font info structure pointer.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>String pointers within the <a href="ft2-type1_tables.html#PS_FontInfoRec">PS_FontInfoRec</a> structure are owned by the face and don't need to be freed by the caller. Missing entries in the font's FontInfo dictionary are represented by NULL pointers.</p>
<p>If the font's format is not PostScript-based, this function will return the &lsquo;FT_Err_Invalid_Argument&rsquo; error code.</p>
<hr>
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<div class="section">
<h3 id="FT_Get_PS_Font_Private">FT_Get_PS_Font_Private</h3>
<p>Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Get_PS_Font_Private</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-type1_tables.html#PS_Private">PS_Private</a> afont_private );
</pre>
<p>Retrieve the <a href="ft2-type1_tables.html#PS_PrivateRec">PS_PrivateRec</a> structure corresponding to a given PostScript font.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>PostScript face handle.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="afont_private">afont_private</td><td class="desc">
<p>Output private dictionary structure pointer.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>The string pointers within the <a href="ft2-type1_tables.html#PS_PrivateRec">PS_PrivateRec</a> structure are owned by the face and don't need to be freed by the caller.</p>
<p>If the font's format is not PostScript-based, this function returns the &lsquo;FT_Err_Invalid_Argument&rsquo; error code.</p>
<hr>
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<div class="section">
<h3 id="FT_Get_PS_Font_Value">FT_Get_PS_Font_Value</h3>
<p>Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Long">FT_Long</a> )
<b>FT_Get_PS_Font_Value</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-type1_tables.html#PS_Dict_Keys">PS_Dict_Keys</a> key,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> idx,
<span class="keyword">void</span> *value,
<a href="ft2-basic_types.html#FT_Long">FT_Long</a> value_len );
</pre>
<p>Retrieve the value for the supplied key from a PostScript font.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>PostScript face handle.</p>
</td></tr>
<tr><td class="val" id="key">key</td><td class="desc">
<p>An enumeration value representing the dictionary key to retrieve.</p>
</td></tr>
<tr><td class="val" id="idx">idx</td><td class="desc">
<p>For array values, this specifies the index to be returned.</p>
</td></tr>
<tr><td class="val" id="value">value</td><td class="desc">
<p>A pointer to memory into which to write the value.</p>
</td></tr>
<tr><td class="val" id="valen_len">valen_len</td><td class="desc">
<p>The size, in bytes, of the memory supplied for the value.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="value">value</td><td class="desc">
<p>The value matching the above key, if it exists.</p>
</td></tr>
</table>
<h4>return</h4>
<p>The amount of memory (in bytes) required to hold the requested value (if it exists, -1 otherwise).</p>
<h4>note</h4>
<p>The values returned are not pointers into the internal structures of the face, but are &lsquo;fresh&rsquo; copies, so that the memory containing them belongs to the calling application. This also enforces the &lsquo;read-only&rsquo; nature of these values, i.e., this function cannot be used to manipulate the face.</p>
<p>&lsquo;value&rsquo; is a void pointer because the values returned can be of various types.</p>
<p>If either &lsquo;value&rsquo; is NULL or &lsquo;value_len&rsquo; is too small, just the required memory size for the requested entry is returned.</p>
<p>The &lsquo;idx&rsquo; parameter is used, not only to retrieve elements of, for example, the FontMatrix or FontBBox, but also to retrieve name keys from the CharStrings dictionary, and the charstrings themselves. It is ignored for atomic values.</p>
<p>PS_DICT_BLUE_SCALE returns a value that is scaled up by 1000. To get the value as in the font stream, you need to divide by 65536000.0 (to remove the FT_Fixed scale, and the x1000 scale).</p>
<p>IMPORTANT: Only key/value pairs read by the FreeType interpreter can be retrieved. So, for example, PostScript procedures such as NP, ND, and RD are not available. Arbitrary keys are, obviously, not be available either.</p>
<p>If the font's format is not PostScript-based, this function returns the &lsquo;FT_Err_Invalid_Argument&rsquo; error code.</p>
<hr>
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<div class="section">
<h3 id="T1_Blend_Flags">T1_Blend_Flags</h3>
<p>Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">enum</span> T1_Blend_Flags_
{
/* required fields in a FontInfo blend dictionary */
<a href="ft2-type1_tables.html#T1_BLEND_UNDERLINE_POSITION">T1_BLEND_UNDERLINE_POSITION</a> = 0,
<a href="ft2-type1_tables.html#T1_BLEND_UNDERLINE_THICKNESS">T1_BLEND_UNDERLINE_THICKNESS</a>,
<a href="ft2-type1_tables.html#T1_BLEND_ITALIC_ANGLE">T1_BLEND_ITALIC_ANGLE</a>,
/* required fields in a Private blend dictionary */
<a href="ft2-type1_tables.html#T1_BLEND_BLUE_VALUES">T1_BLEND_BLUE_VALUES</a>,
<a href="ft2-type1_tables.html#T1_BLEND_OTHER_BLUES">T1_BLEND_OTHER_BLUES</a>,
<a href="ft2-type1_tables.html#T1_BLEND_STANDARD_WIDTH">T1_BLEND_STANDARD_WIDTH</a>,
<a href="ft2-type1_tables.html#T1_BLEND_STANDARD_HEIGHT">T1_BLEND_STANDARD_HEIGHT</a>,
<a href="ft2-type1_tables.html#T1_BLEND_STEM_SNAP_WIDTHS">T1_BLEND_STEM_SNAP_WIDTHS</a>,
<a href="ft2-type1_tables.html#T1_BLEND_STEM_SNAP_HEIGHTS">T1_BLEND_STEM_SNAP_HEIGHTS</a>,
<a href="ft2-type1_tables.html#T1_BLEND_BLUE_SCALE">T1_BLEND_BLUE_SCALE</a>,
<a href="ft2-type1_tables.html#T1_BLEND_BLUE_SHIFT">T1_BLEND_BLUE_SHIFT</a>,
<a href="ft2-type1_tables.html#T1_BLEND_FAMILY_BLUES">T1_BLEND_FAMILY_BLUES</a>,
<a href="ft2-type1_tables.html#T1_BLEND_FAMILY_OTHER_BLUES">T1_BLEND_FAMILY_OTHER_BLUES</a>,
<a href="ft2-type1_tables.html#T1_BLEND_FORCE_BOLD">T1_BLEND_FORCE_BOLD</a>,
T1_BLEND_MAX /* do not remove */
} <b>T1_Blend_Flags</b>;
/* these constants are deprecated; use the corresponding */
/* `<b>T1_Blend_Flags</b>' values instead */
#define t1_blend_underline_position <a href="ft2-type1_tables.html#T1_BLEND_UNDERLINE_POSITION">T1_BLEND_UNDERLINE_POSITION</a>
#define t1_blend_underline_thickness <a href="ft2-type1_tables.html#T1_BLEND_UNDERLINE_THICKNESS">T1_BLEND_UNDERLINE_THICKNESS</a>
#define t1_blend_italic_angle <a href="ft2-type1_tables.html#T1_BLEND_ITALIC_ANGLE">T1_BLEND_ITALIC_ANGLE</a>
#define t1_blend_blue_values <a href="ft2-type1_tables.html#T1_BLEND_BLUE_VALUES">T1_BLEND_BLUE_VALUES</a>
#define t1_blend_other_blues <a href="ft2-type1_tables.html#T1_BLEND_OTHER_BLUES">T1_BLEND_OTHER_BLUES</a>
#define t1_blend_standard_widths <a href="ft2-type1_tables.html#T1_BLEND_STANDARD_WIDTH">T1_BLEND_STANDARD_WIDTH</a>
#define t1_blend_standard_height <a href="ft2-type1_tables.html#T1_BLEND_STANDARD_HEIGHT">T1_BLEND_STANDARD_HEIGHT</a>
#define t1_blend_stem_snap_widths <a href="ft2-type1_tables.html#T1_BLEND_STEM_SNAP_WIDTHS">T1_BLEND_STEM_SNAP_WIDTHS</a>
#define t1_blend_stem_snap_heights <a href="ft2-type1_tables.html#T1_BLEND_STEM_SNAP_HEIGHTS">T1_BLEND_STEM_SNAP_HEIGHTS</a>
#define t1_blend_blue_scale <a href="ft2-type1_tables.html#T1_BLEND_BLUE_SCALE">T1_BLEND_BLUE_SCALE</a>
#define t1_blend_blue_shift <a href="ft2-type1_tables.html#T1_BLEND_BLUE_SHIFT">T1_BLEND_BLUE_SHIFT</a>
#define t1_blend_family_blues <a href="ft2-type1_tables.html#T1_BLEND_FAMILY_BLUES">T1_BLEND_FAMILY_BLUES</a>
#define t1_blend_family_other_blues <a href="ft2-type1_tables.html#T1_BLEND_FAMILY_OTHER_BLUES">T1_BLEND_FAMILY_OTHER_BLUES</a>
#define t1_blend_force_bold <a href="ft2-type1_tables.html#T1_BLEND_FORCE_BOLD">T1_BLEND_FORCE_BOLD</a>
#define t1_blend_max T1_BLEND_MAX
</pre>
<p>A set of flags used to indicate which fields are present in a given blend dictionary (font info or private). Used to support Multiple Masters fonts.</p>
<h4>values</h4>
<table class="fields">
<tr><td class="val" id="T1_BLEND_UNDERLINE_POSITION">T1_BLEND_UNDERLINE_POSITION</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="T1_BLEND_UNDERLINE_THICKNESS">T1_BLEND_UNDERLINE_THICKNESS</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="T1_BLEND_ITALIC_ANGLE">T1_BLEND_ITALIC_ANGLE</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="T1_BLEND_BLUE_VALUES">T1_BLEND_BLUE_VALUES</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="T1_BLEND_OTHER_BLUES">T1_BLEND_OTHER_BLUES</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="T1_BLEND_STANDARD_WIDTH">T1_BLEND_STANDARD_WIDTH</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="T1_BLEND_STANDARD_HEIGHT">T1_BLEND_STANDARD_HEIGHT</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="T1_BLEND_STEM_SNAP_WIDTHS">T1_BLEND_STEM_SNAP_WIDTHS</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="T1_BLEND_STEM_SNAP_HEIGHTS">T1_BLEND_STEM_SNAP_HEIGHTS</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="T1_BLEND_BLUE_SCALE">T1_BLEND_BLUE_SCALE</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="T1_BLEND_BLUE_SHIFT">T1_BLEND_BLUE_SHIFT</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="T1_BLEND_FAMILY_BLUES">T1_BLEND_FAMILY_BLUES</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="T1_BLEND_FAMILY_OTHER_BLUES">T1_BLEND_FAMILY_OTHER_BLUES</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="T1_BLEND_FORCE_BOLD">T1_BLEND_FORCE_BOLD</td><td class="desc">
<p></p>
</td></tr>
</table>
<hr>
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<div class="section">
<h3 id="T1_EncodingType">T1_EncodingType</h3>
<p>Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">enum</span> T1_EncodingType_
{
<a href="ft2-type1_tables.html#T1_ENCODING_TYPE_NONE">T1_ENCODING_TYPE_NONE</a> = 0,
<a href="ft2-type1_tables.html#T1_ENCODING_TYPE_ARRAY">T1_ENCODING_TYPE_ARRAY</a>,
<a href="ft2-type1_tables.html#T1_ENCODING_TYPE_STANDARD">T1_ENCODING_TYPE_STANDARD</a>,
<a href="ft2-type1_tables.html#T1_ENCODING_TYPE_ISOLATIN1">T1_ENCODING_TYPE_ISOLATIN1</a>,
<a href="ft2-type1_tables.html#T1_ENCODING_TYPE_EXPERT">T1_ENCODING_TYPE_EXPERT</a>
} <b>T1_EncodingType</b>;
</pre>
<p>An enumeration describing the &lsquo;Encoding&rsquo; entry in a Type 1 dictionary.</p>
<h4>values</h4>
<table class="fields">
<tr><td class="val" id="T1_ENCODING_TYPE_NONE">T1_ENCODING_TYPE_NONE</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="T1_ENCODING_TYPE_ARRAY">T1_ENCODING_TYPE_ARRAY</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="T1_ENCODING_TYPE_STANDARD">T1_ENCODING_TYPE_STANDARD</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="T1_ENCODING_TYPE_ISOLATIN1">T1_ENCODING_TYPE_ISOLATIN1</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="T1_ENCODING_TYPE_EXPERT">T1_ENCODING_TYPE_EXPERT</td><td class="desc">
<p></p>
</td></tr>
</table>
<hr>
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<div class="section">
<h3 id="PS_Dict_Keys">PS_Dict_Keys</h3>
<p>Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">enum</span> PS_Dict_Keys_
{
/* conventionally in the font dictionary */
<a href="ft2-type1_tables.html#PS_DICT_FONT_TYPE">PS_DICT_FONT_TYPE</a>, /* <a href="ft2-basic_types.html#FT_Byte">FT_Byte</a> */
<a href="ft2-type1_tables.html#PS_DICT_FONT_MATRIX">PS_DICT_FONT_MATRIX</a>, /* <a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> */
<a href="ft2-type1_tables.html#PS_DICT_FONT_BBOX">PS_DICT_FONT_BBOX</a>, /* <a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> */
<a href="ft2-type1_tables.html#PS_DICT_PAINT_TYPE">PS_DICT_PAINT_TYPE</a>, /* <a href="ft2-basic_types.html#FT_Byte">FT_Byte</a> */
<a href="ft2-type1_tables.html#PS_DICT_FONT_NAME">PS_DICT_FONT_NAME</a>, /* <a href="ft2-basic_types.html#FT_String">FT_String</a>* */
<a href="ft2-type1_tables.html#PS_DICT_UNIQUE_ID">PS_DICT_UNIQUE_ID</a>, /* <a href="ft2-basic_types.html#FT_Int">FT_Int</a> */
<a href="ft2-type1_tables.html#PS_DICT_NUM_CHAR_STRINGS">PS_DICT_NUM_CHAR_STRINGS</a>, /* <a href="ft2-basic_types.html#FT_Int">FT_Int</a> */
<a href="ft2-type1_tables.html#PS_DICT_CHAR_STRING_KEY">PS_DICT_CHAR_STRING_KEY</a>, /* <a href="ft2-basic_types.html#FT_String">FT_String</a>* */
<a href="ft2-type1_tables.html#PS_DICT_CHAR_STRING">PS_DICT_CHAR_STRING</a>, /* <a href="ft2-basic_types.html#FT_String">FT_String</a>* */
<a href="ft2-type1_tables.html#PS_DICT_ENCODING_TYPE">PS_DICT_ENCODING_TYPE</a>, /* <a href="ft2-type1_tables.html#T1_EncodingType">T1_EncodingType</a> */
<a href="ft2-type1_tables.html#PS_DICT_ENCODING_ENTRY">PS_DICT_ENCODING_ENTRY</a>, /* <a href="ft2-basic_types.html#FT_String">FT_String</a>* */
/* conventionally in the font Private dictionary */
<a href="ft2-type1_tables.html#PS_DICT_NUM_SUBRS">PS_DICT_NUM_SUBRS</a>, /* <a href="ft2-basic_types.html#FT_Int">FT_Int</a> */
<a href="ft2-type1_tables.html#PS_DICT_SUBR">PS_DICT_SUBR</a>, /* <a href="ft2-basic_types.html#FT_String">FT_String</a>* */
<a href="ft2-type1_tables.html#PS_DICT_STD_HW">PS_DICT_STD_HW</a>, /* <a href="ft2-basic_types.html#FT_UShort">FT_UShort</a> */
<a href="ft2-type1_tables.html#PS_DICT_STD_VW">PS_DICT_STD_VW</a>, /* <a href="ft2-basic_types.html#FT_UShort">FT_UShort</a> */
<a href="ft2-type1_tables.html#PS_DICT_NUM_BLUE_VALUES">PS_DICT_NUM_BLUE_VALUES</a>, /* <a href="ft2-basic_types.html#FT_Byte">FT_Byte</a> */
<a href="ft2-type1_tables.html#PS_DICT_BLUE_VALUE">PS_DICT_BLUE_VALUE</a>, /* <a href="ft2-basic_types.html#FT_Short">FT_Short</a> */
<a href="ft2-type1_tables.html#PS_DICT_BLUE_FUZZ">PS_DICT_BLUE_FUZZ</a>, /* <a href="ft2-basic_types.html#FT_Int">FT_Int</a> */
<a href="ft2-type1_tables.html#PS_DICT_NUM_OTHER_BLUES">PS_DICT_NUM_OTHER_BLUES</a>, /* <a href="ft2-basic_types.html#FT_Byte">FT_Byte</a> */
<a href="ft2-type1_tables.html#PS_DICT_OTHER_BLUE">PS_DICT_OTHER_BLUE</a>, /* <a href="ft2-basic_types.html#FT_Short">FT_Short</a> */
<a href="ft2-type1_tables.html#PS_DICT_NUM_FAMILY_BLUES">PS_DICT_NUM_FAMILY_BLUES</a>, /* <a href="ft2-basic_types.html#FT_Byte">FT_Byte</a> */
<a href="ft2-type1_tables.html#PS_DICT_FAMILY_BLUE">PS_DICT_FAMILY_BLUE</a>, /* <a href="ft2-basic_types.html#FT_Short">FT_Short</a> */
<a href="ft2-type1_tables.html#PS_DICT_NUM_FAMILY_OTHER_BLUES">PS_DICT_NUM_FAMILY_OTHER_BLUES</a>, /* <a href="ft2-basic_types.html#FT_Byte">FT_Byte</a> */
<a href="ft2-type1_tables.html#PS_DICT_FAMILY_OTHER_BLUE">PS_DICT_FAMILY_OTHER_BLUE</a>, /* <a href="ft2-basic_types.html#FT_Short">FT_Short</a> */
<a href="ft2-type1_tables.html#PS_DICT_BLUE_SCALE">PS_DICT_BLUE_SCALE</a>, /* <a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> */
<a href="ft2-type1_tables.html#PS_DICT_BLUE_SHIFT">PS_DICT_BLUE_SHIFT</a>, /* <a href="ft2-basic_types.html#FT_Int">FT_Int</a> */
<a href="ft2-type1_tables.html#PS_DICT_NUM_STEM_SNAP_H">PS_DICT_NUM_STEM_SNAP_H</a>, /* <a href="ft2-basic_types.html#FT_Byte">FT_Byte</a> */
<a href="ft2-type1_tables.html#PS_DICT_STEM_SNAP_H">PS_DICT_STEM_SNAP_H</a>, /* <a href="ft2-basic_types.html#FT_Short">FT_Short</a> */
<a href="ft2-type1_tables.html#PS_DICT_NUM_STEM_SNAP_V">PS_DICT_NUM_STEM_SNAP_V</a>, /* <a href="ft2-basic_types.html#FT_Byte">FT_Byte</a> */
<a href="ft2-type1_tables.html#PS_DICT_STEM_SNAP_V">PS_DICT_STEM_SNAP_V</a>, /* <a href="ft2-basic_types.html#FT_Short">FT_Short</a> */
<a href="ft2-type1_tables.html#PS_DICT_FORCE_BOLD">PS_DICT_FORCE_BOLD</a>, /* <a href="ft2-basic_types.html#FT_Bool">FT_Bool</a> */
<a href="ft2-type1_tables.html#PS_DICT_RND_STEM_UP">PS_DICT_RND_STEM_UP</a>, /* <a href="ft2-basic_types.html#FT_Bool">FT_Bool</a> */
<a href="ft2-type1_tables.html#PS_DICT_MIN_FEATURE">PS_DICT_MIN_FEATURE</a>, /* <a href="ft2-basic_types.html#FT_Short">FT_Short</a> */
<a href="ft2-type1_tables.html#PS_DICT_LEN_IV">PS_DICT_LEN_IV</a>, /* <a href="ft2-basic_types.html#FT_Int">FT_Int</a> */
<a href="ft2-type1_tables.html#PS_DICT_PASSWORD">PS_DICT_PASSWORD</a>, /* <a href="ft2-basic_types.html#FT_Long">FT_Long</a> */
<a href="ft2-type1_tables.html#PS_DICT_LANGUAGE_GROUP">PS_DICT_LANGUAGE_GROUP</a>, /* <a href="ft2-basic_types.html#FT_Long">FT_Long</a> */
/* conventionally in the font FontInfo dictionary */
<a href="ft2-type1_tables.html#PS_DICT_VERSION">PS_DICT_VERSION</a>, /* <a href="ft2-basic_types.html#FT_String">FT_String</a>* */
<a href="ft2-type1_tables.html#PS_DICT_NOTICE">PS_DICT_NOTICE</a>, /* <a href="ft2-basic_types.html#FT_String">FT_String</a>* */
<a href="ft2-type1_tables.html#PS_DICT_FULL_NAME">PS_DICT_FULL_NAME</a>, /* <a href="ft2-basic_types.html#FT_String">FT_String</a>* */
<a href="ft2-type1_tables.html#PS_DICT_FAMILY_NAME">PS_DICT_FAMILY_NAME</a>, /* <a href="ft2-basic_types.html#FT_String">FT_String</a>* */
<a href="ft2-type1_tables.html#PS_DICT_WEIGHT">PS_DICT_WEIGHT</a>, /* <a href="ft2-basic_types.html#FT_String">FT_String</a>* */
<a href="ft2-type1_tables.html#PS_DICT_IS_FIXED_PITCH">PS_DICT_IS_FIXED_PITCH</a>, /* <a href="ft2-basic_types.html#FT_Bool">FT_Bool</a> */
<a href="ft2-type1_tables.html#PS_DICT_UNDERLINE_POSITION">PS_DICT_UNDERLINE_POSITION</a>, /* <a href="ft2-basic_types.html#FT_Short">FT_Short</a> */
<a href="ft2-type1_tables.html#PS_DICT_UNDERLINE_THICKNESS">PS_DICT_UNDERLINE_THICKNESS</a>, /* <a href="ft2-basic_types.html#FT_UShort">FT_UShort</a> */
<a href="ft2-type1_tables.html#PS_DICT_FS_TYPE">PS_DICT_FS_TYPE</a>, /* <a href="ft2-basic_types.html#FT_UShort">FT_UShort</a> */
<a href="ft2-type1_tables.html#PS_DICT_ITALIC_ANGLE">PS_DICT_ITALIC_ANGLE</a>, /* <a href="ft2-basic_types.html#FT_Long">FT_Long</a> */
PS_DICT_MAX = <a href="ft2-type1_tables.html#PS_DICT_ITALIC_ANGLE">PS_DICT_ITALIC_ANGLE</a>
} <b>PS_Dict_Keys</b>;
</pre>
<p>An enumeration used in calls to <a href="ft2-type1_tables.html#FT_Get_PS_Font_Value">FT_Get_PS_Font_Value</a> to identify the Type&nbsp;1 dictionary entry to retrieve.</p>
<h4>values</h4>
<table class="fields">
<tr><td class="val" id="PS_DICT_FONT_TYPE">PS_DICT_FONT_TYPE</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_FONT_MATRIX">PS_DICT_FONT_MATRIX</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_FONT_BBOX">PS_DICT_FONT_BBOX</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_PAINT_TYPE">PS_DICT_PAINT_TYPE</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_FONT_NAME">PS_DICT_FONT_NAME</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_UNIQUE_ID">PS_DICT_UNIQUE_ID</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_NUM_CHAR_STRINGS">PS_DICT_NUM_CHAR_STRINGS</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_CHAR_STRING_KEY">PS_DICT_CHAR_STRING_KEY</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_CHAR_STRING">PS_DICT_CHAR_STRING</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_ENCODING_TYPE">PS_DICT_ENCODING_TYPE</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_ENCODING_ENTRY">PS_DICT_ENCODING_ENTRY</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_NUM_SUBRS">PS_DICT_NUM_SUBRS</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_SUBR">PS_DICT_SUBR</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_STD_HW">PS_DICT_STD_HW</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_STD_VW">PS_DICT_STD_VW</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_NUM_BLUE_VALUES">PS_DICT_NUM_BLUE_VALUES</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_BLUE_VALUE">PS_DICT_BLUE_VALUE</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_BLUE_FUZZ">PS_DICT_BLUE_FUZZ</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_NUM_OTHER_BLUES">PS_DICT_NUM_OTHER_BLUES</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_OTHER_BLUE">PS_DICT_OTHER_BLUE</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_NUM_FAMILY_BLUES">PS_DICT_NUM_FAMILY_BLUES</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_FAMILY_BLUE">PS_DICT_FAMILY_BLUE</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_NUM_FAMILY_OTHER_BLUES">PS_DICT_NUM_FAMILY_OTHER_BLUES</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_FAMILY_OTHER_BLUE">PS_DICT_FAMILY_OTHER_BLUE</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_BLUE_SCALE">PS_DICT_BLUE_SCALE</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_BLUE_SHIFT">PS_DICT_BLUE_SHIFT</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_NUM_STEM_SNAP_H">PS_DICT_NUM_STEM_SNAP_H</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_STEM_SNAP_H">PS_DICT_STEM_SNAP_H</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_NUM_STEM_SNAP_V">PS_DICT_NUM_STEM_SNAP_V</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_STEM_SNAP_V">PS_DICT_STEM_SNAP_V</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_FORCE_BOLD">PS_DICT_FORCE_BOLD</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_RND_STEM_UP">PS_DICT_RND_STEM_UP</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_MIN_FEATURE">PS_DICT_MIN_FEATURE</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_LEN_IV">PS_DICT_LEN_IV</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_PASSWORD">PS_DICT_PASSWORD</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_LANGUAGE_GROUP">PS_DICT_LANGUAGE_GROUP</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_VERSION">PS_DICT_VERSION</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_NOTICE">PS_DICT_NOTICE</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_FULL_NAME">PS_DICT_FULL_NAME</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_FAMILY_NAME">PS_DICT_FAMILY_NAME</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_WEIGHT">PS_DICT_WEIGHT</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_IS_FIXED_PITCH">PS_DICT_IS_FIXED_PITCH</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_UNDERLINE_POSITION">PS_DICT_UNDERLINE_POSITION</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_UNDERLINE_THICKNESS">PS_DICT_UNDERLINE_THICKNESS</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_FS_TYPE">PS_DICT_FS_TYPE</td><td class="desc">
<p></p>
</td></tr>
<tr><td class="val" id="PS_DICT_ITALIC_ANGLE">PS_DICT_ITALIC_ANGLE</td><td class="desc">
<p></p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="T1_FontInfo">T1_FontInfo</h3>
<p>Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).</p>
<pre>
<span class="keyword">typedef</span> <a href="ft2-type1_tables.html#PS_FontInfoRec">PS_FontInfoRec</a> <b>T1_FontInfo</b>;
</pre>
<p>This type is equivalent to <a href="ft2-type1_tables.html#PS_FontInfoRec">PS_FontInfoRec</a>. It is deprecated but kept to maintain source compatibility between various versions of FreeType.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="T1_Private">T1_Private</h3>
<p>Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).</p>
<pre>
<span class="keyword">typedef</span> <a href="ft2-type1_tables.html#PS_PrivateRec">PS_PrivateRec</a> <b>T1_Private</b>;
</pre>
<p>This type is equivalent to <a href="ft2-type1_tables.html#PS_PrivateRec">PS_PrivateRec</a>. It is deprecated but kept to maintain source compatibility between various versions of FreeType.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="CID_FontDict">CID_FontDict</h3>
<p>Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).</p>
<pre>
<span class="keyword">typedef</span> <a href="ft2-type1_tables.html#CID_FaceDictRec">CID_FaceDictRec</a> <b>CID_FontDict</b>;
</pre>
<p>This type is equivalent to <a href="ft2-type1_tables.html#CID_FaceDictRec">CID_FaceDictRec</a>. It is deprecated but kept to maintain source compatibility between various versions of FreeType.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="CID_Info">CID_Info</h3>
<p>Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).</p>
<pre>
<span class="keyword">typedef</span> <a href="ft2-type1_tables.html#CID_FaceInfoRec">CID_FaceInfoRec</a> <b>CID_Info</b>;
</pre>
<p>This type is equivalent to <a href="ft2-type1_tables.html#CID_FaceInfoRec">CID_FaceInfoRec</a>. It is deprecated but kept to maintain source compatibility between various versions of FreeType.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="user_allocation">User allocation</h1>
<p>FreeType assumes that structures allocated by the user and passed as arguments are zeroed out except for the actual data. In other words, it is recommended to use &lsquo;calloc&rsquo; (or variants of it) instead of &lsquo;malloc&rsquo; for allocation.</p>
</body>
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<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table>
<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="version">FreeType Version</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_Library_Version">FT_Library_Version</a></td><td>&nbsp;</td></tr>
<tr><td>&nbsp;</td><td><a href="#FT_Face_CheckTrueTypePatents">FT_Face_CheckTrueTypePatents</a></td></tr>
<tr><td><a href="#FREETYPE_MAJOR">FREETYPE_MAJOR</a></td><td><a href="#FT_Face_SetUnpatentedHinting">FT_Face_SetUnpatentedHinting</a></td></tr>
<tr><td><a href="#FREETYPE_MINOR">FREETYPE_MINOR</a></td><td>&nbsp;</td></tr>
<tr><td><a href="#FREETYPE_PATCH">FREETYPE_PATCH</a></td><td><a href="#FREETYPE_XXX">FREETYPE_XXX</a></td></tr>
</table>
<p>Note that those functions and macros are of limited use because even a new release of FreeType with only documentation changes increases the version number.</p>
<div class="section">
<h3 id="FT_Library_Version">FT_Library_Version</h3>
<p>Defined in FT_FREETYPE_H (freetype/freetype.h).</p>
<pre>
FT_EXPORT( <span class="keyword">void</span> )
<b>FT_Library_Version</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library,
<a href="ft2-basic_types.html#FT_Int">FT_Int</a> *amajor,
<a href="ft2-basic_types.html#FT_Int">FT_Int</a> *aminor,
<a href="ft2-basic_types.html#FT_Int">FT_Int</a> *apatch );
</pre>
<p>Return the version of the FreeType library being used. This is useful when dynamically linking to the library, since one cannot use the macros <a href="ft2-version.html#FREETYPE_XXX">FREETYPE_MAJOR</a>, <a href="ft2-version.html#FREETYPE_XXX">FREETYPE_MINOR</a>, and <a href="ft2-version.html#FREETYPE_XXX">FREETYPE_PATCH</a>.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="library">library</td><td class="desc">
<p>A source library handle.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="amajor">amajor</td><td class="desc">
<p>The major version number.</p>
</td></tr>
<tr><td class="val" id="aminor">aminor</td><td class="desc">
<p>The minor version number.</p>
</td></tr>
<tr><td class="val" id="apatch">apatch</td><td class="desc">
<p>The patch version number.</p>
</td></tr>
</table>
<h4>note</h4>
<p>The reason why this function takes a &lsquo;library&rsquo; argument is because certain programs implement library initialization in a custom way that doesn't use <a href="ft2-base_interface.html#FT_Init_FreeType">FT_Init_FreeType</a>.</p>
<p>In such cases, the library version might not be available before the library object has been created.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Face_CheckTrueTypePatents">FT_Face_CheckTrueTypePatents</h3>
<p>Defined in FT_FREETYPE_H (freetype/freetype.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Bool">FT_Bool</a> )
<b>FT_Face_CheckTrueTypePatents</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face );
</pre>
<p>Deprecated, does nothing.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A face handle.</p>
</td></tr>
</table>
<h4>return</h4>
<p>Always returns false.</p>
<h4>note</h4>
<p>Since May 2010, TrueType hinting is no longer patented.</p>
<h4>since</h4>
<p>2.3.5</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Face_SetUnpatentedHinting">FT_Face_SetUnpatentedHinting</h3>
<p>Defined in FT_FREETYPE_H (freetype/freetype.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Bool">FT_Bool</a> )
<b>FT_Face_SetUnpatentedHinting</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_Bool">FT_Bool</a> value );
</pre>
<p>Deprecated, does nothing.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A face handle.</p>
</td></tr>
<tr><td class="val" id="value">value</td><td class="desc">
<p>New boolean setting.</p>
</td></tr>
</table>
<h4>return</h4>
<p>Always returns false.</p>
<h4>note</h4>
<p>Since May 2010, TrueType hinting is no longer patented.</p>
<h4>since</h4>
<p>2.3.5</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FREETYPE_XXX">FREETYPE_XXX</h3>
<p>Defined in FT_FREETYPE_H (freetype/freetype.h).</p>
<pre>
#define <a href="ft2-version.html#FREETYPE_MAJOR">FREETYPE_MAJOR</a> 2
#define <a href="ft2-version.html#FREETYPE_MINOR">FREETYPE_MINOR</a> 8
#define <a href="ft2-version.html#FREETYPE_PATCH">FREETYPE_PATCH</a> 1
</pre>
<p>These three macros identify the FreeType source code version. Use <a href="ft2-version.html#FT_Library_Version">FT_Library_Version</a> to access them at runtime.</p>
<h4>values</h4>
<table class="fields">
<tr><td class="val" id="FREETYPE_MAJOR">FREETYPE_MAJOR</td><td class="desc">
<p>The major version number.</p>
</td></tr>
<tr><td class="val" id="FREETYPE_MINOR">FREETYPE_MINOR</td><td class="desc">
<p>The minor version number.</p>
</td></tr>
<tr><td class="val" id="FREETYPE_PATCH">FREETYPE_PATCH</td><td class="desc">
<p>The patch level.</p>
</td></tr>
</table>
<h4>note</h4>
<p>The version number of FreeType if built as a dynamic link library with the &lsquo;libtool&rsquo; package is <i>not</i> controlled by these three macros.</p>
<hr>
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<h1>FreeType-2.8.1 API Reference</h1>
<h1 id="winfnt_fonts">Window FNT Files</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_WinFNT_ID_XXX">FT_WinFNT_ID_XXX</a></td><td><a href="#FT_WinFNT_Header">FT_WinFNT_Header</a></td><td></td></tr>
<tr><td><a href="#FT_WinFNT_HeaderRec">FT_WinFNT_HeaderRec</a></td><td><a href="#FT_Get_WinFNT_Header">FT_Get_WinFNT_Header</a></td><td></td></tr>
</table>
<p>This section contains the declaration of Windows FNT specific functions.</p>
<div class="section">
<h3 id="FT_WinFNT_ID_XXX">FT_WinFNT_ID_XXX</h3>
<p>Defined in FT_WINFONTS_H (freetype/ftwinfnt.h).</p>
<pre>
#define <a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_CP1252">FT_WinFNT_ID_CP1252</a> 0
#define <a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_DEFAULT">FT_WinFNT_ID_DEFAULT</a> 1
#define <a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_SYMBOL">FT_WinFNT_ID_SYMBOL</a> 2
#define <a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_MAC">FT_WinFNT_ID_MAC</a> 77
#define <a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_CP932">FT_WinFNT_ID_CP932</a> 128
#define <a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_CP949">FT_WinFNT_ID_CP949</a> 129
#define <a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_CP1361">FT_WinFNT_ID_CP1361</a> 130
#define <a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_CP936">FT_WinFNT_ID_CP936</a> 134
#define <a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_CP950">FT_WinFNT_ID_CP950</a> 136
#define <a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_CP1253">FT_WinFNT_ID_CP1253</a> 161
#define <a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_CP1254">FT_WinFNT_ID_CP1254</a> 162
#define <a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_CP1258">FT_WinFNT_ID_CP1258</a> 163
#define <a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_CP1255">FT_WinFNT_ID_CP1255</a> 177
#define <a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_CP1256">FT_WinFNT_ID_CP1256</a> 178
#define <a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_CP1257">FT_WinFNT_ID_CP1257</a> 186
#define <a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_CP1251">FT_WinFNT_ID_CP1251</a> 204
#define <a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_CP874">FT_WinFNT_ID_CP874</a> 222
#define <a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_CP1250">FT_WinFNT_ID_CP1250</a> 238
#define <a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_OEM">FT_WinFNT_ID_OEM</a> 255
</pre>
<p>A list of valid values for the &lsquo;charset&rsquo; byte in <a href="ft2-winfnt_fonts.html#FT_WinFNT_HeaderRec">FT_WinFNT_HeaderRec</a>. Exact mapping tables for the various cpXXXX encodings (except for cp1361) can be found at <a href="ftp://ftp.unicode.org/Public">ftp://ftp.unicode.org/Public</a> in the MAPPINGS/VENDORS/MICSFT/WINDOWS subdirectory. cp1361 is roughly a superset of MAPPINGS/OBSOLETE/EASTASIA/KSC/JOHAB.TXT.</p>
<h4>values</h4>
<table class="fields">
<tr><td class="val" id="FT_WinFNT_ID_DEFAULT">FT_WinFNT_ID_DEFAULT</td><td class="desc">
<p>This is used for font enumeration and font creation as a &lsquo;don't care&rsquo; value. Valid font files don't contain this value. When querying for information about the character set of the font that is currently selected into a specified device context, this return value (of the related Windows API) simply denotes failure.</p>
</td></tr>
<tr><td class="val" id="FT_WinFNT_ID_SYMBOL">FT_WinFNT_ID_SYMBOL</td><td class="desc">
<p>There is no known mapping table available.</p>
</td></tr>
<tr><td class="val" id="FT_WinFNT_ID_MAC">FT_WinFNT_ID_MAC</td><td class="desc">
<p>Mac Roman encoding.</p>
</td></tr>
<tr><td class="val" id="FT_WinFNT_ID_OEM">FT_WinFNT_ID_OEM</td><td class="desc">
<p>From Michael Pöttgen &lt;michael@poettgen.de&gt;:</p>
<p>The &lsquo;Windows Font Mapping&rsquo; article says that FT_WinFNT_ID_OEM is used for the charset of vector fonts, like &lsquo;modern.fon&rsquo;, &lsquo;roman.fon&rsquo;, and &lsquo;script.fon&rsquo; on Windows.</p>
<p>The &lsquo;CreateFont&rsquo; documentation says: The FT_WinFNT_ID_OEM value specifies a character set that is operating-system dependent.</p>
<p>The &lsquo;IFIMETRICS&rsquo; documentation from the &lsquo;Windows Driver Development Kit&rsquo; says: This font supports an OEM-specific character set. The OEM character set is system dependent.</p>
<p>In general OEM, as opposed to ANSI (i.e., cp1252), denotes the second default codepage that most international versions of Windows have. It is one of the OEM codepages from</p>
<p><a href="https://msdn.microsoft.com/en-us/goglobal/bb964655">https://msdn.microsoft.com/en-us/goglobal/bb964655</a>,</p>
<p>and is used for the &lsquo;DOS boxes&rsquo;, to support legacy applications. A German Windows version for example usually uses ANSI codepage 1252 and OEM codepage 850.</p>
</td></tr>
<tr><td class="val" id="FT_WinFNT_ID_CP874">FT_WinFNT_ID_CP874</td><td class="desc">
<p>A superset of Thai TIS 620 and ISO 8859-11.</p>
</td></tr>
<tr><td class="val" id="FT_WinFNT_ID_CP932">FT_WinFNT_ID_CP932</td><td class="desc">
<p>A superset of Japanese Shift-JIS (with minor deviations).</p>
</td></tr>
<tr><td class="val" id="FT_WinFNT_ID_CP936">FT_WinFNT_ID_CP936</td><td class="desc">
<p>A superset of simplified Chinese GB 2312-1980 (with different ordering and minor deviations).</p>
</td></tr>
<tr><td class="val" id="FT_WinFNT_ID_CP949">FT_WinFNT_ID_CP949</td><td class="desc">
<p>A superset of Korean Hangul KS&nbsp;C 5601-1987 (with different ordering and minor deviations).</p>
</td></tr>
<tr><td class="val" id="FT_WinFNT_ID_CP950">FT_WinFNT_ID_CP950</td><td class="desc">
<p>A superset of traditional Chinese Big&nbsp;5 ETen (with different ordering and minor deviations).</p>
</td></tr>
<tr><td class="val" id="FT_WinFNT_ID_CP1250">FT_WinFNT_ID_CP1250</td><td class="desc">
<p>A superset of East European ISO 8859-2 (with slightly different ordering).</p>
</td></tr>
<tr><td class="val" id="FT_WinFNT_ID_CP1251">FT_WinFNT_ID_CP1251</td><td class="desc">
<p>A superset of Russian ISO 8859-5 (with different ordering).</p>
</td></tr>
<tr><td class="val" id="FT_WinFNT_ID_CP1252">FT_WinFNT_ID_CP1252</td><td class="desc">
<p>ANSI encoding. A superset of ISO 8859-1.</p>
</td></tr>
<tr><td class="val" id="FT_WinFNT_ID_CP1253">FT_WinFNT_ID_CP1253</td><td class="desc">
<p>A superset of Greek ISO 8859-7 (with minor modifications).</p>
</td></tr>
<tr><td class="val" id="FT_WinFNT_ID_CP1254">FT_WinFNT_ID_CP1254</td><td class="desc">
<p>A superset of Turkish ISO 8859-9.</p>
</td></tr>
<tr><td class="val" id="FT_WinFNT_ID_CP1255">FT_WinFNT_ID_CP1255</td><td class="desc">
<p>A superset of Hebrew ISO 8859-8 (with some modifications).</p>
</td></tr>
<tr><td class="val" id="FT_WinFNT_ID_CP1256">FT_WinFNT_ID_CP1256</td><td class="desc">
<p>A superset of Arabic ISO 8859-6 (with different ordering).</p>
</td></tr>
<tr><td class="val" id="FT_WinFNT_ID_CP1257">FT_WinFNT_ID_CP1257</td><td class="desc">
<p>A superset of Baltic ISO 8859-13 (with some deviations).</p>
</td></tr>
<tr><td class="val" id="FT_WinFNT_ID_CP1258">FT_WinFNT_ID_CP1258</td><td class="desc">
<p>For Vietnamese. This encoding doesn't cover all necessary characters.</p>
</td></tr>
<tr><td class="val" id="FT_WinFNT_ID_CP1361">FT_WinFNT_ID_CP1361</td><td class="desc">
<p>Korean (Johab).</p>
</td></tr>
</table>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_WinFNT_HeaderRec">FT_WinFNT_HeaderRec</h3>
<p>Defined in FT_WINFONTS_H (freetype/ftwinfnt.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_WinFNT_HeaderRec_
{
<a href="ft2-basic_types.html#FT_UShort">FT_UShort</a> version;
<a href="ft2-basic_types.html#FT_ULong">FT_ULong</a> file_size;
<a href="ft2-basic_types.html#FT_Byte">FT_Byte</a> copyright[60];
<a href="ft2-basic_types.html#FT_UShort">FT_UShort</a> file_type;
<a href="ft2-basic_types.html#FT_UShort">FT_UShort</a> nominal_point_size;
<a href="ft2-basic_types.html#FT_UShort">FT_UShort</a> vertical_resolution;
<a href="ft2-basic_types.html#FT_UShort">FT_UShort</a> horizontal_resolution;
<a href="ft2-basic_types.html#FT_UShort">FT_UShort</a> ascent;
<a href="ft2-basic_types.html#FT_UShort">FT_UShort</a> internal_leading;
<a href="ft2-basic_types.html#FT_UShort">FT_UShort</a> external_leading;
<a href="ft2-basic_types.html#FT_Byte">FT_Byte</a> italic;
<a href="ft2-basic_types.html#FT_Byte">FT_Byte</a> underline;
<a href="ft2-basic_types.html#FT_Byte">FT_Byte</a> strike_out;
<a href="ft2-basic_types.html#FT_UShort">FT_UShort</a> weight;
<a href="ft2-basic_types.html#FT_Byte">FT_Byte</a> charset;
<a href="ft2-basic_types.html#FT_UShort">FT_UShort</a> pixel_width;
<a href="ft2-basic_types.html#FT_UShort">FT_UShort</a> pixel_height;
<a href="ft2-basic_types.html#FT_Byte">FT_Byte</a> pitch_and_family;
<a href="ft2-basic_types.html#FT_UShort">FT_UShort</a> avg_width;
<a href="ft2-basic_types.html#FT_UShort">FT_UShort</a> max_width;
<a href="ft2-basic_types.html#FT_Byte">FT_Byte</a> first_char;
<a href="ft2-basic_types.html#FT_Byte">FT_Byte</a> last_char;
<a href="ft2-basic_types.html#FT_Byte">FT_Byte</a> default_char;
<a href="ft2-basic_types.html#FT_Byte">FT_Byte</a> break_char;
<a href="ft2-basic_types.html#FT_UShort">FT_UShort</a> bytes_per_row;
<a href="ft2-basic_types.html#FT_ULong">FT_ULong</a> device_offset;
<a href="ft2-basic_types.html#FT_ULong">FT_ULong</a> face_name_offset;
<a href="ft2-basic_types.html#FT_ULong">FT_ULong</a> bits_pointer;
<a href="ft2-basic_types.html#FT_ULong">FT_ULong</a> bits_offset;
<a href="ft2-basic_types.html#FT_Byte">FT_Byte</a> reserved;
<a href="ft2-basic_types.html#FT_ULong">FT_ULong</a> flags;
<a href="ft2-basic_types.html#FT_UShort">FT_UShort</a> A_space;
<a href="ft2-basic_types.html#FT_UShort">FT_UShort</a> B_space;
<a href="ft2-basic_types.html#FT_UShort">FT_UShort</a> C_space;
<a href="ft2-basic_types.html#FT_UShort">FT_UShort</a> color_table_offset;
<a href="ft2-basic_types.html#FT_ULong">FT_ULong</a> reserved1[4];
} <b>FT_WinFNT_HeaderRec</b>;
</pre>
<p>Windows FNT Header info.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_WinFNT_Header">FT_WinFNT_Header</h3>
<p>Defined in FT_WINFONTS_H (freetype/ftwinfnt.h).</p>
<pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_WinFNT_HeaderRec_* <b>FT_WinFNT_Header</b>;
</pre>
<p>A handle to an <a href="ft2-winfnt_fonts.html#FT_WinFNT_HeaderRec">FT_WinFNT_HeaderRec</a> structure.</p>
<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
<div class="section">
<h3 id="FT_Get_WinFNT_Header">FT_Get_WinFNT_Header</h3>
<p>Defined in FT_WINFONTS_H (freetype/ftwinfnt.h).</p>
<pre>
FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
<b>FT_Get_WinFNT_Header</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-winfnt_fonts.html#FT_WinFNT_HeaderRec">FT_WinFNT_HeaderRec</a> *aheader );
</pre>
<p>Retrieve a Windows FNT font info header.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to the input face.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="aheader">aheader</td><td class="desc">
<p>The WinFNT header.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>
<h4>note</h4>
<p>This function only works with Windows FNT faces, returning an error otherwise.</p>
<hr>
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</body>
</html>
libs/freetype-2.8.1/docs/release
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How to prepare a new release
----------------------------
. include/freetype/freetype.h: Update FREETYPE_MAJOR, FREETYPE_MINOR,
and FREETYPE_PATCH.
. Update version numbers in all files where necessary (for example, do
a grep for both `2.3.1' and `231' for release 2.3.1).
. builds/unix/configure.raw: Update `version_info'.
. docs/CHANGES: Document differences to last release.
. README: Update.
. docs/VERSIONS.TXT: Document changed `version_info'.
. ChangeLog: Announce new release (both in the freetype2 and
freetype2-demos modules).
. Clone the git archive to another directory with
git clone -l -s . ../freetype2.test
or something like this and run
make distclean; make devel; make
make distclean; make devel; make multi
make distclean; make devel CC=g++; make CC=g++
make distclean; make devel CC=g++; make multi CC=g++
sh autogen.sh
make distclean; ./configure; make
make distclean; ./configure CC=g++; make
in the cloned repository to test compilation with both gcc and g++.
. Test C++ compilation for freetype2-demos too (using `git clone' as
above).
. Run src/tools/chktrcmp.py and check that there are no undefined
trace_XXXX macros.
. After pushing the new release, tag the git repositories (freetype2,
freetype2-demos) with
git tag VER-<version> -m "" -u <committer>
and push the tags with
git push --tags
. Check with
git clean -ndx
that the git directory is really clean (and remove extraneous files
if necessary).
. Say `make dist' in both the freetype2 and freetype2-demos modules
to generate the .tar.gz, .tar.bz2, and .zip files.
. Create the doc bundles (freetype-doc-<version>.tar.gz,
freetype-doc-<version>.tar.bz2, ftdoc<version>.zip). This is
everything in
<freetype-web git repository>/freetype2/docs
except the `reference' subdirectory. Do *not* use option `-l' from
zip!
. Run the following script (with updated `$VERSION', `$SAVANNAH_USER',
and $SOURCEFORGE_USER variables) to sign and upload the bundles to
both Savannah and SourceForge. The signing code has been taken from
the `gnupload' script (part of the automake bundle).
#!/bin/sh
VERSION=2.5.1
SAVANNAH_USER=wl
SOURCEFORGE_USER=wlemb
#####################################################################
GPG='/usr/bin/gpg --batch --no-tty'
version=`echo $VERSION | sed "s/\\.//g"`
FREETYPE_PACKAGES="freetype-$VERSION.tar.gz \
freetype-$VERSION.tar.bz2 \
ft$version.zip"
FT2DEMOS_PACKAGES="ft2demos-$VERSION.tar.gz \
ft2demos-$VERSION.tar.bz2 \
ftdmo$version.zip"
FTDOC_PACKAGES="freetype-doc-$VERSION.tar.gz \
freetype-doc-$VERSION.tar.bz2 \
ftdoc$version.zip"
PACKAGE_LIST="$FREETYPE_PACKAGES \
$FT2DEMOS_PACKAGES \
$FTDOC_PACKAGES"
set -e
unset passphrase
PATH=/empty echo -n "Enter GPG passphrase: "
stty -echo
read -r passphrase
stty echo
echo
for f in $PACKAGE_LIST; do
if test ! -f $f; then
echo "$0: Cannot find \`$f'" 1>&2
exit 1
else
:
fi
done
for f in $PACKAGE_LIST; do
echo "Signing $f..."
rm -f $f.sig
echo $passphrase | $GPG --passphrase-fd 0 -ba -o $f.sig $f
done
FREETYPE_SIGNATURES=
for i in $FREETYPE_PACKAGES; do
FREETYPE_SIGNATURES="$FREETYPE_SIGNATURES $i.sig"
done
FT2DEMOS_SIGNATURES=
for i in $FT2DEMOS_PACKAGES; do
FT2DEMOS_SIGNATURES="$FT2DEMOS_SIGNATURES $i.sig"
done
FTDOC_SIGNATURES=
for i in $FTDOC_PACKAGES; do
FTDOC_SIGNATURES="$FTDOC_SIGNATURES $i.sig"
done
SIGNATURE_LIST="$FREETYPE_SIGNATURES \
$FT2DEMOS_SIGNATURES \
$FTDOC_SIGNATURES"
scp $PACKAGE_LIST $SIGNATURE_LIST \
$SAVANNAH_USER@dl.sv.nongnu.org:/releases/freetype/
rsync -avP -e ssh $FREETYPE_PACKAGES $FREETYPE_SIGNATURES \
$SOURCEFORGE_USER,freetype@frs.sf.net:/home/frs/project/f/fr/freetype/freetype2/$VERSION/
rsync -avP -e ssh $FT2DEMOS_PACKAGES $FT2DEMOS_SIGNATURES \
$SOURCEFORGE_USER,freetype@frs.sf.net:/home/frs/project/f/fr/freetype/freetype-demos/$VERSION/
rsync -avP -e ssh $FTDOC_PACKAGES $FTDOC_SIGNATURES \
$SOURCEFORGE_USER,freetype@frs.sf.net:/home/frs/project/f/fr/freetype/freetype-docs/$VERSION/
# EOF
. Prepare a README for SourceForge and upload it with the following
script (with updated `$VERSION' and $SOURCEFORGE_USER variables).
#!/bin/sh
VERSION=2.5.1
SOURCEFORGE_USER=wlemb
#####################################################################
rsync -avP -e ssh README \
$SOURCEFORGE_USER,freetype@frs.sf.net:/home/frs/project/f/fr/freetype/freetype2/$VERSION/
# EOF
. On SourceForge, tag the just uploaded `ftXXX.zip' and
`freetype-XXX.tar.bz2' files as the default files to download for
`Windows' and `Others', respectively.
. Copy the reference files (generated by `make dist') to
<freetype-web git repository>/freetype2/docs/reference
. Update the `freetype-web' repository. `git push' then automatically
triggers an update of the public web pages within ten minutes, due
to a cron script (on wl@freedesktop.org) that rsyncs with
freedesktop.org://srv/freetype.freedesktop.org/www
. Announce new release on freetype-announce@nongnu.org and to relevant
newsgroups.
----------------------------------------------------------------------
Copyright 2003-2017 by
David Turner, Robert Wilhelm, and Werner Lemberg.
This file is part of the FreeType project, and may only be used,
modified, and distributed under the terms of the FreeType project
license, LICENSE.TXT. By continuing to use, modify, or distribute
this file you indicate that you have read the license and understand
and accept it fully.
--- end of release ---