Add libpng 1.6.6.

This commit is contained in:
rude
2013-09-25 14:39:55 +02:00
parent 9c63bd7721
commit 521291990f
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This demonstrates the use of PNG_USER_CONFIG and pngusr.h
The makefile builds a minimal read-only progressive decoder with
embedded libpng, zlib and your system's X library.
Specify the location of the zlib source (1.2.1 or later) as ZLIBSRC
on the make command line.
Edit makefile if required, to find your X library and include files,
then
make ZLIBSRC=directory
If you prefer to use the shared libraries, go to contrib/gregbook
and build the rpng2-x application there.