diff --git a/CMakeLists.txt b/CMakeLists.txt index 74e19b32c..34a183cdf 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -349,6 +349,8 @@ set(LOVE_SRC_MODULE_IMAGE_MAGPIE src/modules/image/magpie/JPEGHandler.h src/modules/image/magpie/PNGHandler.cpp src/modules/image/magpie/PNGHandler.h + src/modules/image/magpie/STBHandler.cpp + src/modules/image/magpie/STBHandler.h ) set(LOVE_SRC_MODULE_IMAGE @@ -1014,6 +1016,17 @@ set(LOVE_SRC_3P_NOISE1234 add_library(love_3p_noise1234 ${LOVE_SRC_3P_NOISE1234}) +# +# stb_image +# + +set(LOVE_SRC_3P_STB + src/libraries/stb/stb_image.c + src/libraries/stb/stb_image.h +) + +add_library(love_3p_stb ${LOVE_SRC_3P_STB}) + # # utf8 # @@ -1058,6 +1071,7 @@ set(LOVE_3P love_3p_lodepng love_3p_luasocket love_3p_noise1234 + love_3p_stb love_3p_wuff ) diff --git a/platform/macosx/love-framework.xcodeproj/project.pbxproj b/platform/macosx/love-framework.xcodeproj/project.pbxproj index c46110058..91a317797 100644 --- a/platform/macosx/love-framework.xcodeproj/project.pbxproj +++ b/platform/macosx/love-framework.xcodeproj/project.pbxproj @@ -231,6 +231,8 @@ FA48E43618F10D00007CF0BD /* JPEGHandler.cpp in Sources */ = {isa = PBXBuildFile; fileRef = FA48E43418F10D00007CF0BD /* JPEGHandler.cpp */; }; FA48E43718F10D00007CF0BD /* JPEGHandler.h in Headers */ = {isa = PBXBuildFile; fileRef = FA48E43518F10D00007CF0BD /* JPEGHandler.h */; }; FA48E43918F10D6C007CF0BD /* jpeg-turbo.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = FA48E43818F10D6C007CF0BD /* jpeg-turbo.framework */; }; + FA4B5B7519369009006C6D93 /* stb_image.c in Sources */ = {isa = PBXBuildFile; fileRef = FA4B5B7319369009006C6D93 /* stb_image.c */; }; + FA4B5B7A1936B688006C6D93 /* stb_image.h in Headers */ = {isa = PBXBuildFile; fileRef = FA4B5B781936B688006C6D93 /* stb_image.h */; }; FA4BBCDE18A5DC5D0027707D /* lodepng.cpp in Sources */ = {isa = PBXBuildFile; fileRef = FA4BBCDC18A5DC5D0027707D /* lodepng.cpp */; }; FA4BBCDF18A5DC5D0027707D /* lodepng.h in Headers */ = {isa = PBXBuildFile; fileRef = FA4BBCDD18A5DC5D0027707D /* lodepng.h */; }; FA4BBCE218A5DD7E0027707D /* PNGHandler.cpp in Sources */ = {isa = PBXBuildFile; fileRef = FA4BBCE018A5DD7E0027707D /* PNGHandler.cpp */; }; @@ -297,6 +299,8 @@ FAC86E6B1724555D00EED715 /* Quad.cpp in Sources */ = {isa = PBXBuildFile; fileRef = FAC86E671724555D00EED715 /* Quad.cpp */; }; FAC86E6C1724555D00EED715 /* Quad.h in Headers */ = {isa = PBXBuildFile; fileRef = FAC86E681724555D00EED715 /* Quad.h */; }; FADD58DD18C30367005FC3BF /* FormatHandler.cpp in Sources */ = {isa = PBXBuildFile; fileRef = FADD58DC18C30367005FC3BF /* FormatHandler.cpp */; }; + FADE620919368D5C00C25B97 /* STBHandler.cpp in Sources */ = {isa = PBXBuildFile; fileRef = FADE620719368D5C00C25B97 /* STBHandler.cpp */; }; + FADE620A19368D5C00C25B97 /* STBHandler.h in Headers */ = {isa = PBXBuildFile; fileRef = FADE620819368D5C00C25B97 /* STBHandler.h */; }; FAE010DB170DDE99006F29D0 /* ddsinfo.h in Headers */ = {isa = PBXBuildFile; fileRef = FAE010D8170DDE99006F29D0 /* ddsinfo.h */; }; FAE010DC170DDE99006F29D0 /* ddsparse.cpp in Sources */ = {isa = PBXBuildFile; fileRef = FAE010D9170DDE99006F29D0 /* ddsparse.cpp */; }; FAE010DD170DDE99006F29D0 /* ddsparse.h in Headers */ = {isa = PBXBuildFile; fileRef = FAE010DA170DDE99006F29D0 /* ddsparse.h */; }; @@ -787,6 +791,8 @@ FA48E43418F10D00007CF0BD /* JPEGHandler.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = JPEGHandler.cpp; sourceTree = ""; }; FA48E43518F10D00007CF0BD /* JPEGHandler.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = JPEGHandler.h; sourceTree = ""; }; FA48E43818F10D6C007CF0BD /* jpeg-turbo.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = "jpeg-turbo.framework"; path = "/Library/Frameworks/jpeg-turbo.framework"; sourceTree = ""; }; + FA4B5B7319369009006C6D93 /* stb_image.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = stb_image.c; sourceTree = ""; }; + FA4B5B781936B688006C6D93 /* stb_image.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = stb_image.h; sourceTree = ""; }; FA4BBCDC18A5DC5D0027707D /* lodepng.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = lodepng.cpp; sourceTree = ""; }; FA4BBCDD18A5DC5D0027707D /* lodepng.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = lodepng.h; sourceTree = ""; }; FA4BBCE018A5DD7E0027707D /* PNGHandler.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = PNGHandler.cpp; sourceTree = ""; }; @@ -862,6 +868,8 @@ FAC86E671724555D00EED715 /* Quad.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = Quad.cpp; sourceTree = ""; }; FAC86E681724555D00EED715 /* Quad.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = Quad.h; sourceTree = ""; }; FADD58DC18C30367005FC3BF /* FormatHandler.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = FormatHandler.cpp; sourceTree = ""; }; + FADE620719368D5C00C25B97 /* STBHandler.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = STBHandler.cpp; sourceTree = ""; }; + FADE620819368D5C00C25B97 /* STBHandler.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = STBHandler.h; sourceTree = ""; }; FAE010D8170DDE99006F29D0 /* ddsinfo.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ddsinfo.h; sourceTree = ""; }; FAE010D9170DDE99006F29D0 /* ddsparse.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = ddsparse.cpp; sourceTree = ""; }; FAE010DA170DDE99006F29D0 /* ddsparse.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ddsparse.h; sourceTree = ""; }; @@ -1113,6 +1121,8 @@ FA48E43518F10D00007CF0BD /* JPEGHandler.h */, FA4BBCE018A5DD7E0027707D /* PNGHandler.cpp */, FA4BBCE118A5DD7E0027707D /* PNGHandler.h */, + FADE620719368D5C00C25B97 /* STBHandler.cpp */, + FADE620819368D5C00C25B97 /* STBHandler.h */, ); path = magpie; sourceTree = ""; @@ -1408,6 +1418,7 @@ FA4BBCDB18A5DC5D0027707D /* lodepng */, 3AED1DE005A53DDB07902760 /* luasocket */, FA0354691731F3A700284828 /* noise1234 */, + FA4B5B7219369009006C6D93 /* stb */, 36C14C81334735EC54E33637 /* utf8 */, FAF6704318184FF800DBDEEA /* Wuff */, ); @@ -1845,6 +1856,15 @@ path = sdl; sourceTree = ""; }; + FA4B5B7219369009006C6D93 /* stb */ = { + isa = PBXGroup; + children = ( + FA4B5B7319369009006C6D93 /* stb_image.c */, + FA4B5B781936B688006C6D93 /* stb_image.h */, + ); + path = stb; + sourceTree = ""; + }; FA4BBCDB18A5DC5D0027707D /* lodepng */ = { isa = PBXGroup; children = ( @@ -1993,6 +2013,7 @@ FAF272A716E3D44400CC193A /* LuaThread.h in Headers */, FAF4377017F4AC530074F9E2 /* Mesh.h in Headers */, FA4BBCDF18A5DC5D0027707D /* lodepng.h in Headers */, + FADE620A19368D5C00C25B97 /* STBHandler.h in Headers */, FAF272A916E3D44400CC193A /* ThreadModule.h in Headers */, FA4BBCE318A5DD7E0027707D /* PNGHandler.h in Headers */, FAF6705018184FF800DBDEEA /* wuff_convert.h in Headers */, @@ -2013,6 +2034,7 @@ FA7AA59317F6AC1F00704BE2 /* wrap_Mesh.h in Headers */, FA01BE1F1878E35B00640047 /* wrap_Texture.h in Headers */, FAEC808B1710FEA60057279A /* ImageData.h in Headers */, + FA4B5B7A1936B688006C6D93 /* stb_image.h in Headers */, FAEC808F1711E76C0057279A /* CompressedData.h in Headers */, FA636D8B171B70920065623F /* RandomGenerator.h in Headers */, FA636D8F171B72A70065623F /* wrap_RandomGenerator.h in Headers */, @@ -2131,6 +2153,7 @@ FA08F5BE16C7532A00F007B5 /* Memoizer.cpp in Sources */, FA08F5BF16C7532A00F007B5 /* Module.cpp in Sources */, FA08F5C016C7532A00F007B5 /* Object.cpp in Sources */, + FADE620919368D5C00C25B97 /* STBHandler.cpp in Sources */, FAF670561818501300DBDEEA /* WaveDecoder.cpp in Sources */, FA08F5C116C7532A00F007B5 /* Reference.cpp in Sources */, FA08F5C216C7532A00F007B5 /* runtime.cpp in Sources */, @@ -2183,6 +2206,7 @@ FA08F5EF16C7538F00F007B5 /* b2RevoluteJoint.cpp in Sources */, FA08F5F016C7538F00F007B5 /* b2RopeJoint.cpp in Sources */, FA08F5F116C7538F00F007B5 /* b2WeldJoint.cpp in Sources */, + FA4B5B7519369009006C6D93 /* stb_image.c in Sources */, FA4BBCDE18A5DC5D0027707D /* lodepng.cpp in Sources */, FA08F5F216C7538F00F007B5 /* b2WheelJoint.cpp in Sources */, FA08F5F316C7539B00F007B5 /* b2Rope.cpp in Sources */, diff --git a/src/libraries/stb/stb_image.c b/src/libraries/stb/stb_image.c new file mode 100644 index 000000000..7b07b27fb --- /dev/null +++ b/src/libraries/stb/stb_image.c @@ -0,0 +1,1596 @@ +/* stbi-1.35 - public domain JPEG/PNG reader - http://nothings.org/stb_image.c + when you control the images you're loading + no warranty implied; use at your own risk + + QUICK NOTES: + Primarily of interest to game developers and other people who can + avoid problematic images and only need the trivial interface + + JPEG baseline (no JPEG progressive) + PNG 8-bit-per-channel only + + TGA (not sure what subset, if a subset) + BMP non-1bpp, non-RLE + PSD (composited view only, no extra channels) + + GIF (*comp always reports as 4-channel) + HDR (radiance rgbE format) + PIC (Softimage PIC) + + - decode from memory or through FILE (define STBI_NO_STDIO to remove code) + - decode from arbitrary I/O callbacks + - overridable dequantizing-IDCT, YCbCr-to-RGB conversion (define STBI_SIMD) + + Latest revisions: + 1.35 (2014-05-27) warnings, bugfixes, TGA optimization, etc + 1.34 (unknown ) warning fix + 1.33 (2011-07-14) minor fixes suggested by Dave Moore + 1.32 (2011-07-13) info support for all filetypes (SpartanJ) + 1.31 (2011-06-19) a few more leak fixes, bug in PNG handling (SpartanJ) + 1.30 (2011-06-11) added ability to load files via io callbacks (Ben Wenger) + 1.29 (2010-08-16) various warning fixes from Aurelien Pocheville + 1.28 (2010-08-01) fix bug in GIF palette transparency (SpartanJ) + + See end of file for full revision history. + + TODO: + stbi_info support for BMP,PSD,HDR,PIC + + + ============================ Contributors ========================= + + Image formats Bug fixes & warning fixes + Sean Barrett (jpeg, png, bmp) Marc LeBlanc + Nicolas Schulz (hdr, psd) Christpher Lloyd + Jonathan Dummer (tga) Dave Moore + Jean-Marc Lienher (gif) Won Chun + Tom Seddon (pic) the Horde3D community + Thatcher Ulrich (psd) Janez Zemva + Jonathan Blow + Laurent Gomila + Extensions, features Aruelien Pocheville + Jetro Lauha (stbi_info) Ryamond Barbiero + James "moose2000" Brown (iPhone PNG) David Woo + Ben "Disch" Wenger (io callbacks) Roy Eltham + Martin "SpartanJ" Golini Luke Graham + Thomas Ruf + John Bartholomew + Optimizations & bugfixes Ken Hamada + Fabian "ryg" Giesen Cort Stratton + Arseny Kapoulkine Blazej Dariusz Roszkowski + Thibault Reuille + If your name should be here but Paul Du Bois + isn't let Sean know. Guillaume George + +*/ + +/* Modified by Alex Szpakowski to remove all decoding functionality except for + TGA and BMP formats. +*/ + +#include "stb_image.h" + +#ifndef STBI_NO_HDR +#include // ldexp +#include // strcmp, strtok +#endif + +#ifndef STBI_NO_STDIO +#include +#endif +#include +#include +#include +#include +#include // ptrdiff_t on osx + +#ifndef _MSC_VER + #ifdef __cplusplus + #define stbi_inline inline + #else + #define stbi_inline + #endif +#else + #define stbi_inline __forceinline +#endif + + +#ifdef _MSC_VER +typedef unsigned char stbi__uint8; +typedef unsigned short stbi__uint16; +typedef signed short stbi__int16; +typedef unsigned int stbi__uint32; +typedef signed int stbi__int32; +#else +#include +typedef uint8_t stbi__uint8; +typedef uint16_t stbi__uint16; +typedef int16_t stbi__int16; +typedef uint32_t stbi__uint32; +typedef int32_t stbi__int32; +#endif + +// should produce compiler error if size is wrong +typedef unsigned char validate_uint32[sizeof(stbi__uint32)==4 ? 1 : -1]; + +#ifdef _MSC_VER +#define STBI_NOTUSED(v) (void)(v) +#else +#define STBI_NOTUSED(v) (void)sizeof(v) +#endif + +#ifdef _MSC_VER +#define STBI_HAS_LROTL +#endif + +#ifdef STBI_HAS_LROTL + #define stbi_lrot(x,y) _lrotl(x,y) +#else + #define stbi_lrot(x,y) (((x) << (y)) | ((x) >> (32 - (y)))) +#endif + +/////////////////////////////////////////////// +// +// stbi struct and start_xxx functions + +// stbi structure is our basic context used by all images, so it +// contains all the IO context, plus some basic image information +typedef struct +{ + stbi__uint32 img_x, img_y; + int img_n, img_out_n; + + stbi_io_callbacks io; + void *io_user_data; + + int read_from_callbacks; + int buflen; + stbi__uint8 buffer_start[128]; + + stbi__uint8 *img_buffer, *img_buffer_end; + stbi__uint8 *img_buffer_original; +} stbi; + + +static void refill_buffer(stbi *s); + +// initialize a memory-decode context +static void start_mem(stbi *s, stbi__uint8 const *buffer, int len) +{ + s->io.read = NULL; + s->read_from_callbacks = 0; + s->img_buffer = s->img_buffer_original = (stbi__uint8 *) buffer; + s->img_buffer_end = (stbi__uint8 *) buffer+len; +} + +// initialize a callback-based context +static void start_callbacks(stbi *s, stbi_io_callbacks *c, void *user) +{ + s->io = *c; + s->io_user_data = user; + s->buflen = sizeof(s->buffer_start); + s->read_from_callbacks = 1; + s->img_buffer_original = s->buffer_start; + refill_buffer(s); +} + +#ifndef STBI_NO_STDIO + +static int stdio_read(void *user, char *data, int size) +{ + return (int) fread(data,1,size,(FILE*) user); +} + +static void stdio_skip(void *user, int n) +{ + fseek((FILE*) user, n, SEEK_CUR); +} + +static int stdio_eof(void *user) +{ + return feof((FILE*) user); +} + +static stbi_io_callbacks stbi_stdio_callbacks = +{ + stdio_read, + stdio_skip, + stdio_eof, +}; + +static void start_file(stbi *s, FILE *f) +{ + start_callbacks(s, &stbi_stdio_callbacks, (void *) f); +} + +//static void stop_file(stbi *s) { } + +#endif // !STBI_NO_STDIO + +static void stbi_rewind(stbi *s) +{ + // conceptually rewind SHOULD rewind to the beginning of the stream, + // but we just rewind to the beginning of the initial buffer, because + // we only use it after doing 'test', which only ever looks at at most 92 bytes + s->img_buffer = s->img_buffer_original; +} + +static int stbi_bmp_test(stbi *s); +static stbi_uc *stbi_bmp_load(stbi *s, int *x, int *y, int *comp, int req_comp); +static int stbi_tga_test(stbi *s); +static stbi_uc *stbi_tga_load(stbi *s, int *x, int *y, int *comp, int req_comp); +static int stbi_tga_info(stbi *s, int *x, int *y, int *comp); +#ifndef STBI_NO_HDR +static int stbi_hdr_test(stbi *s); +static float *stbi_hdr_load(stbi *s, int *x, int *y, int *comp, int req_comp); +#endif + + +// this is not threadsafe +static const char *failure_reason; + +const char *stbi_failure_reason(void) +{ + return failure_reason; +} + +static int e(const char *str) +{ + failure_reason = str; + return 0; +} + +// e - error +// epf - error returning pointer to float +// epuc - error returning pointer to unsigned char + +#ifdef STBI_NO_FAILURE_STRINGS + #define e(x,y) 0 +#elif defined(STBI_FAILURE_USERMSG) + #define e(x,y) e(y) +#else + #define e(x,y) e(x) +#endif + +#define epf(x,y) ((float *) (e(x,y)?NULL:NULL)) +#define epuc(x,y) ((unsigned char *) (e(x,y)?NULL:NULL)) + +void stbi_image_free(void *retval_from_stbi_load) +{ + free(retval_from_stbi_load); +} + +#ifndef STBI_NO_HDR +static float *ldr_to_hdr(stbi_uc *data, int x, int y, int comp); +static stbi_uc *hdr_to_ldr(float *data, int x, int y, int comp); +#endif + +static unsigned char *stbi_load_main(stbi *s, int *x, int *y, int *comp, int req_comp) +{ + if (stbi_bmp_test(s)) return stbi_bmp_load(s,x,y,comp,req_comp); + + #ifndef STBI_NO_HDR + if (stbi_hdr_test(s)) { + float *hdr = stbi_hdr_load(s, x,y,comp,req_comp); + return hdr_to_ldr(hdr, *x, *y, req_comp ? req_comp : *comp); + } + #endif + + // test tga last because it's a crappy test! + if (stbi_tga_test(s)) + return stbi_tga_load(s,x,y,comp,req_comp); + return epuc("unknown image type", "Image not of any known type, or corrupt"); +} + +#ifndef STBI_NO_STDIO +unsigned char *stbi_load(char const *filename, int *x, int *y, int *comp, int req_comp) +{ + FILE *f = fopen(filename, "rb"); + unsigned char *result; + if (!f) return epuc("can't fopen", "Unable to open file"); + result = stbi_load_from_file(f,x,y,comp,req_comp); + fclose(f); + return result; +} + +unsigned char *stbi_load_from_file(FILE *f, int *x, int *y, int *comp, int req_comp) +{ + unsigned char *result; + stbi s; + start_file(&s,f); + result = stbi_load_main(&s,x,y,comp,req_comp); + if (result) { + // need to 'unget' all the characters in the IO buffer + fseek(f, - (int) (s.img_buffer_end - s.img_buffer), SEEK_CUR); + } + return result; +} +#endif //!STBI_NO_STDIO + +unsigned char *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) +{ + stbi s; + start_mem(&s,buffer,len); + return stbi_load_main(&s,x,y,comp,req_comp); +} + +unsigned char *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp) +{ + stbi s; + start_callbacks(&s, (stbi_io_callbacks *) clbk, user); + return stbi_load_main(&s,x,y,comp,req_comp); +} + +#ifndef STBI_NO_HDR + +float *stbi_loadf_main(stbi *s, int *x, int *y, int *comp, int req_comp) +{ + unsigned char *data; + #ifndef STBI_NO_HDR + if (stbi_hdr_test(s)) + return stbi_hdr_load(s,x,y,comp,req_comp); + #endif + data = stbi_load_main(s, x, y, comp, req_comp); + if (data) + return ldr_to_hdr(data, *x, *y, req_comp ? req_comp : *comp); + return epf("unknown image type", "Image not of any known type, or corrupt"); +} + +float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) +{ + stbi s; + start_mem(&s,buffer,len); + return stbi_loadf_main(&s,x,y,comp,req_comp); +} + +float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp) +{ + stbi s; + start_callbacks(&s, (stbi_io_callbacks *) clbk, user); + return stbi_loadf_main(&s,x,y,comp,req_comp); +} + +#ifndef STBI_NO_STDIO +float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp) +{ + FILE *f = fopen(filename, "rb"); + float *result; + if (!f) return epf("can't fopen", "Unable to open file"); + result = stbi_loadf_from_file(f,x,y,comp,req_comp); + fclose(f); + return result; +} + +float *stbi_loadf_from_file(FILE *f, int *x, int *y, int *comp, int req_comp) +{ + stbi s; + start_file(&s,f); + return stbi_loadf_main(&s,x,y,comp,req_comp); +} +#endif // !STBI_NO_STDIO + +#endif // !STBI_NO_HDR + +// these is-hdr-or-not is defined independent of whether STBI_NO_HDR is +// defined, for API simplicity; if STBI_NO_HDR is defined, it always +// reports false! + +int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len) +{ + #ifndef STBI_NO_HDR + stbi s; + start_mem(&s,buffer,len); + return stbi_hdr_test(&s); + #else + STBI_NOTUSED(buffer); + STBI_NOTUSED(len); + return 0; + #endif +} + +#ifndef STBI_NO_STDIO +extern int stbi_is_hdr (char const *filename) +{ + FILE *f = fopen(filename, "rb"); + int result=0; + if (f) { + result = stbi_is_hdr_from_file(f); + fclose(f); + } + return result; +} + +extern int stbi_is_hdr_from_file(FILE *f) +{ + #ifndef STBI_NO_HDR + stbi s; + start_file(&s,f); + return stbi_hdr_test(&s); + #else + return 0; + #endif +} +#endif // !STBI_NO_STDIO + +extern int stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user) +{ + #ifndef STBI_NO_HDR + stbi s; + start_callbacks(&s, (stbi_io_callbacks *) clbk, user); + return stbi_hdr_test(&s); + #else + (void) clbk; + (void) user; + return 0; + #endif +} + +#ifndef STBI_NO_HDR +static float h2l_gamma_i=1.0f/2.2f, h2l_scale_i=1.0f; +static float l2h_gamma=2.2f, l2h_scale=1.0f; + +void stbi_hdr_to_ldr_gamma(float gamma) { h2l_gamma_i = 1/gamma; } +void stbi_hdr_to_ldr_scale(float scale) { h2l_scale_i = 1/scale; } + +void stbi_ldr_to_hdr_gamma(float gamma) { l2h_gamma = gamma; } +void stbi_ldr_to_hdr_scale(float scale) { l2h_scale = scale; } +#endif + + +////////////////////////////////////////////////////////////////////////////// +// +// Common code used by all image loaders +// + +enum +{ + SCAN_load=0, + SCAN_type, + SCAN_header +}; + +static void refill_buffer(stbi *s) +{ + int n = (s->io.read)(s->io_user_data,(char*)s->buffer_start,s->buflen); + if (n == 0) { + // at end of file, treat same as if from memory, but need to handle case + // where s->img_buffer isn't pointing to safe memory, e.g. 0-byte file + s->read_from_callbacks = 0; + s->img_buffer = s->buffer_start; + s->img_buffer_end = s->buffer_start+1; + *s->img_buffer = 0; + } else { + s->img_buffer = s->buffer_start; + s->img_buffer_end = s->buffer_start + n; + } +} + +stbi_inline static int get8(stbi *s) +{ + if (s->img_buffer < s->img_buffer_end) + return *s->img_buffer++; + if (s->read_from_callbacks) { + refill_buffer(s); + return *s->img_buffer++; + } + return 0; +} + +#ifndef STBI_NO_HDR +stbi_inline static int at_eof(stbi *s) +{ + if (s->io.read) { + if (!(s->io.eof)(s->io_user_data)) return 0; + // if feof() is true, check if buffer = end + // special case: we've only got the special 0 character at the end + if (s->read_from_callbacks == 0) return 1; + } + + return s->img_buffer >= s->img_buffer_end; +} +#endif + +stbi_inline static stbi__uint8 get8u(stbi *s) +{ + return (stbi__uint8) get8(s); +} + +static void skip(stbi *s, int n) +{ + if (s->io.read) { + int blen = (int) (s->img_buffer_end - s->img_buffer); + if (blen < n) { + s->img_buffer = s->img_buffer_end; + (s->io.skip)(s->io_user_data, n - blen); + return; + } + } + s->img_buffer += n; +} + +static int getn(stbi *s, stbi_uc *buffer, int n) +{ + if (s->io.read) { + int blen = (int) (s->img_buffer_end - s->img_buffer); + if (blen < n) { + int res, count; + + memcpy(buffer, s->img_buffer, blen); + + count = (s->io.read)(s->io_user_data, (char*) buffer + blen, n - blen); + res = (count == (n-blen)); + s->img_buffer = s->img_buffer_end; + return res; + } + } + + if (s->img_buffer+n <= s->img_buffer_end) { + memcpy(buffer, s->img_buffer, n); + s->img_buffer += n; + return 1; + } else + return 0; +} + +static int get16(stbi *s) +{ + int z = get8(s); + return (z << 8) + get8(s); +} + +static int get16le(stbi *s) +{ + int z = get8(s); + return z + (get8(s) << 8); +} + +static stbi__uint32 get32le(stbi *s) +{ + stbi__uint32 z = get16le(s); + return z + (get16le(s) << 16); +} + +////////////////////////////////////////////////////////////////////////////// +// +// generic converter from built-in img_n to req_comp +// individual types do this automatically as much as possible (e.g. jpeg +// does all cases internally since it needs to colorspace convert anyway, +// and it never has alpha, so very few cases ). png can automatically +// interleave an alpha=255 channel, but falls back to this for other cases +// +// assume data buffer is malloced, so malloc a new one and free that one +// only failure mode is malloc failing + +static stbi__uint8 compute_y(int r, int g, int b) +{ + return (stbi__uint8) (((r*77) + (g*150) + (29*b)) >> 8); +} + +static unsigned char *convert_format(unsigned char *data, int img_n, int req_comp, unsigned int x, unsigned int y) +{ + int i,j; + unsigned char *good; + + if (req_comp == img_n) return data; + assert(req_comp >= 1 && req_comp <= 4); + + good = (unsigned char *) malloc(req_comp * x * y); + if (good == NULL) { + free(data); + return epuc("outofmem", "Out of memory"); + } + + for (j=0; j < (int) y; ++j) { + unsigned char *src = data + j * x * img_n ; + unsigned char *dest = good + j * x * req_comp; + + #define COMBO(a,b) ((a)*8+(b)) + #define CASE(a,b) case COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b) + // convert source image with img_n components to one with req_comp components; + // avoid switch per pixel, so use switch per scanline and massive macros + switch (COMBO(img_n, req_comp)) { + CASE(1,2) dest[0]=src[0], dest[1]=255; break; + CASE(1,3) dest[0]=dest[1]=dest[2]=src[0]; break; + CASE(1,4) dest[0]=dest[1]=dest[2]=src[0], dest[3]=255; break; + CASE(2,1) dest[0]=src[0]; break; + CASE(2,3) dest[0]=dest[1]=dest[2]=src[0]; break; + CASE(2,4) dest[0]=dest[1]=dest[2]=src[0], dest[3]=src[1]; break; + CASE(3,4) dest[0]=src[0],dest[1]=src[1],dest[2]=src[2],dest[3]=255; break; + CASE(3,1) dest[0]=compute_y(src[0],src[1],src[2]); break; + CASE(3,2) dest[0]=compute_y(src[0],src[1],src[2]), dest[1] = 255; break; + CASE(4,1) dest[0]=compute_y(src[0],src[1],src[2]); break; + CASE(4,2) dest[0]=compute_y(src[0],src[1],src[2]), dest[1] = src[3]; break; + CASE(4,3) dest[0]=src[0],dest[1]=src[1],dest[2]=src[2]; break; + default: assert(0); + } + #undef CASE + } + + free(data); + return good; +} + +#ifndef STBI_NO_HDR +static float *ldr_to_hdr(stbi_uc *data, int x, int y, int comp) +{ + int i,k,n; + float *output = (float *) malloc(x * y * comp * sizeof(float)); + if (output == NULL) { free(data); return epf("outofmem", "Out of memory"); } + // compute number of non-alpha components + if (comp & 1) n = comp; else n = comp-1; + for (i=0; i < x*y; ++i) { + for (k=0; k < n; ++k) { + output[i*comp + k] = (float) pow(data[i*comp+k]/255.0f, l2h_gamma) * l2h_scale; + } + if (k < comp) output[i*comp + k] = data[i*comp+k]/255.0f; + } + free(data); + return output; +} + +#define float2int(x) ((int) (x)) +static stbi_uc *hdr_to_ldr(float *data, int x, int y, int comp) +{ + int i,k,n; + stbi_uc *output = (stbi_uc *) malloc(x * y * comp); + if (output == NULL) { free(data); return epuc("outofmem", "Out of memory"); } + // compute number of non-alpha components + if (comp & 1) n = comp; else n = comp-1; + for (i=0; i < x*y; ++i) { + for (k=0; k < n; ++k) { + float z = (float) pow(data[i*comp+k]*h2l_scale_i, h2l_gamma_i) * 255 + 0.5f; + if (z < 0) z = 0; + if (z > 255) z = 255; + output[i*comp + k] = (stbi__uint8) float2int(z); + } + if (k < comp) { + float z = data[i*comp+k] * 255 + 0.5f; + if (z < 0) z = 0; + if (z > 255) z = 255; + output[i*comp + k] = (stbi__uint8) float2int(z); + } + } + free(data); + return output; +} +#endif + + +// Microsoft/Windows BMP image + +static int bmp_test(stbi *s) +{ + int sz; + if (get8(s) != 'B') return 0; + if (get8(s) != 'M') return 0; + get32le(s); // discard filesize + get16le(s); // discard reserved + get16le(s); // discard reserved + get32le(s); // discard data offset + sz = get32le(s); + if (sz == 12 || sz == 40 || sz == 56 || sz == 108) return 1; + return 0; +} + +static int stbi_bmp_test(stbi *s) +{ + int r = bmp_test(s); + stbi_rewind(s); + return r; +} + + +// returns 0..31 for the highest set bit +static int high_bit(unsigned int z) +{ + int n=0; + if (z == 0) return -1; + if (z >= 0x10000) n += 16, z >>= 16; + if (z >= 0x00100) n += 8, z >>= 8; + if (z >= 0x00010) n += 4, z >>= 4; + if (z >= 0x00004) n += 2, z >>= 2; + if (z >= 0x00002) n += 1, z >>= 1; + return n; +} + +static int bitcount(unsigned int a) +{ + a = (a & 0x55555555) + ((a >> 1) & 0x55555555); // max 2 + a = (a & 0x33333333) + ((a >> 2) & 0x33333333); // max 4 + a = (a + (a >> 4)) & 0x0f0f0f0f; // max 8 per 4, now 8 bits + a = (a + (a >> 8)); // max 16 per 8 bits + a = (a + (a >> 16)); // max 32 per 8 bits + return a & 0xff; +} + +static int shiftsigned(int v, int shift, int bits) +{ + int result; + int z=0; + + if (shift < 0) v <<= -shift; + else v >>= shift; + result = v; + + z = bits; + while (z < 8) { + result += v >> z; + z += bits; + } + return result; +} + +static stbi_uc *bmp_load(stbi *s, int *x, int *y, int *comp, int req_comp) +{ + stbi__uint8 *out; + unsigned int mr=0,mg=0,mb=0,ma=0, fake_a=0; + stbi_uc pal[256][4]; + int psize=0,i,j,compress=0,width; + int bpp, flip_vertically, pad, target, offset, hsz; + if (get8(s) != 'B' || get8(s) != 'M') return epuc("not BMP", "Corrupt BMP"); + get32le(s); // discard filesize + get16le(s); // discard reserved + get16le(s); // discard reserved + offset = get32le(s); + hsz = get32le(s); + if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108) return epuc("unknown BMP", "BMP type not supported: unknown"); + if (hsz == 12) { + s->img_x = get16le(s); + s->img_y = get16le(s); + } else { + s->img_x = get32le(s); + s->img_y = get32le(s); + } + if (get16le(s) != 1) return epuc("bad BMP", "bad BMP"); + bpp = get16le(s); + if (bpp == 1) return epuc("monochrome", "BMP type not supported: 1-bit"); + flip_vertically = ((int) s->img_y) > 0; + s->img_y = abs((int) s->img_y); + if (hsz == 12) { + if (bpp < 24) + psize = (offset - 14 - 24) / 3; + } else { + compress = get32le(s); + if (compress == 1 || compress == 2) return epuc("BMP RLE", "BMP type not supported: RLE"); + get32le(s); // discard sizeof + get32le(s); // discard hres + get32le(s); // discard vres + get32le(s); // discard colorsused + get32le(s); // discard max important + if (hsz == 40 || hsz == 56) { + if (hsz == 56) { + get32le(s); + get32le(s); + get32le(s); + get32le(s); + } + if (bpp == 16 || bpp == 32) { + mr = mg = mb = 0; + if (compress == 0) { + if (bpp == 32) { + mr = 0xffu << 16; + mg = 0xffu << 8; + mb = 0xffu << 0; + ma = 0xffu << 24; + fake_a = 1; // @TODO: check for cases like alpha value is all 0 and switch it to 255 + STBI_NOTUSED(fake_a); + } else { + mr = 31u << 10; + mg = 31u << 5; + mb = 31u << 0; + } + } else if (compress == 3) { + mr = get32le(s); + mg = get32le(s); + mb = get32le(s); + // not documented, but generated by photoshop and handled by mspaint + if (mr == mg && mg == mb) { + // ?!?!? + return epuc("bad BMP", "bad BMP"); + } + } else + return epuc("bad BMP", "bad BMP"); + } + } else { + assert(hsz == 108); + mr = get32le(s); + mg = get32le(s); + mb = get32le(s); + ma = get32le(s); + get32le(s); // discard color space + for (i=0; i < 12; ++i) + get32le(s); // discard color space parameters + } + if (bpp < 16) + psize = (offset - 14 - hsz) >> 2; + } + s->img_n = ma ? 4 : 3; + if (req_comp && req_comp >= 3) // we can directly decode 3 or 4 + target = req_comp; + else + target = s->img_n; // if they want monochrome, we'll post-convert + out = (stbi_uc *) malloc(target * s->img_x * s->img_y); + if (!out) return epuc("outofmem", "Out of memory"); + if (bpp < 16) { + int z=0; + if (psize == 0 || psize > 256) { free(out); return epuc("invalid", "Corrupt BMP"); } + for (i=0; i < psize; ++i) { + pal[i][2] = get8u(s); + pal[i][1] = get8u(s); + pal[i][0] = get8u(s); + if (hsz != 12) get8(s); + pal[i][3] = 255; + } + skip(s, offset - 14 - hsz - psize * (hsz == 12 ? 3 : 4)); + if (bpp == 4) width = (s->img_x + 1) >> 1; + else if (bpp == 8) width = s->img_x; + else { free(out); return epuc("bad bpp", "Corrupt BMP"); } + pad = (-width)&3; + for (j=0; j < (int) s->img_y; ++j) { + for (i=0; i < (int) s->img_x; i += 2) { + int v=get8(s),v2=0; + if (bpp == 4) { + v2 = v & 15; + v >>= 4; + } + out[z++] = pal[v][0]; + out[z++] = pal[v][1]; + out[z++] = pal[v][2]; + if (target == 4) out[z++] = 255; + if (i+1 == (int) s->img_x) break; + v = (bpp == 8) ? get8(s) : v2; + out[z++] = pal[v][0]; + out[z++] = pal[v][1]; + out[z++] = pal[v][2]; + if (target == 4) out[z++] = 255; + } + skip(s, pad); + } + } else { + int rshift=0,gshift=0,bshift=0,ashift=0,rcount=0,gcount=0,bcount=0,acount=0; + int z = 0; + int easy=0; + skip(s, offset - 14 - hsz); + if (bpp == 24) width = 3 * s->img_x; + else if (bpp == 16) width = 2*s->img_x; + else /* bpp = 32 and pad = 0 */ width=0; + pad = (-width) & 3; + if (bpp == 24) { + easy = 1; + } else if (bpp == 32) { + if (mb == 0xff && mg == 0xff00 && mr == 0x00ff0000 && ma == 0xff000000) + easy = 2; + } + if (!easy) { + if (!mr || !mg || !mb) { free(out); return epuc("bad masks", "Corrupt BMP"); } + // right shift amt to put high bit in position #7 + rshift = high_bit(mr)-7; rcount = bitcount(mr); + gshift = high_bit(mg)-7; gcount = bitcount(mg); + bshift = high_bit(mb)-7; bcount = bitcount(mb); + ashift = high_bit(ma)-7; acount = bitcount(ma); + } + for (j=0; j < (int) s->img_y; ++j) { + if (easy) { + for (i=0; i < (int) s->img_x; ++i) { + int a; + out[z+2] = get8u(s); + out[z+1] = get8u(s); + out[z+0] = get8u(s); + z += 3; + a = (easy == 2 ? get8(s) : 255); + if (target == 4) out[z++] = (stbi__uint8) a; + } + } else { + for (i=0; i < (int) s->img_x; ++i) { + stbi__uint32 v = (stbi__uint32) (bpp == 16 ? get16le(s) : get32le(s)); + int a; + out[z++] = (stbi__uint8) shiftsigned(v & mr, rshift, rcount); + out[z++] = (stbi__uint8) shiftsigned(v & mg, gshift, gcount); + out[z++] = (stbi__uint8) shiftsigned(v & mb, bshift, bcount); + a = (ma ? shiftsigned(v & ma, ashift, acount) : 255); + if (target == 4) out[z++] = (stbi__uint8) a; + } + } + skip(s, pad); + } + } + if (flip_vertically) { + stbi_uc t; + for (j=0; j < (int) s->img_y>>1; ++j) { + stbi_uc *p1 = out + j *s->img_x*target; + stbi_uc *p2 = out + (s->img_y-1-j)*s->img_x*target; + for (i=0; i < (int) s->img_x*target; ++i) { + t = p1[i], p1[i] = p2[i], p2[i] = t; + } + } + } + + if (req_comp && req_comp != target) { + out = convert_format(out, target, req_comp, s->img_x, s->img_y); + if (out == NULL) return out; // convert_format frees input on failure + } + + *x = s->img_x; + *y = s->img_y; + if (comp) *comp = s->img_n; + return out; +} + +static stbi_uc *stbi_bmp_load(stbi *s,int *x, int *y, int *comp, int req_comp) +{ + return bmp_load(s, x,y,comp,req_comp); +} + + +// Targa Truevision - TGA +// by Jonathan Dummer + +static int tga_info(stbi *s, int *x, int *y, int *comp) +{ + int tga_w, tga_h, tga_comp; + int sz; + get8u(s); // discard Offset + sz = get8u(s); // color type + if( sz > 1 ) { + stbi_rewind(s); + return 0; // only RGB or indexed allowed + } + sz = get8u(s); // image type + // only RGB or grey allowed, +/- RLE + if ((sz != 1) && (sz != 2) && (sz != 3) && (sz != 9) && (sz != 10) && (sz != 11)) return 0; + skip(s,9); + tga_w = get16le(s); + if( tga_w < 1 ) { + stbi_rewind(s); + return 0; // test width + } + tga_h = get16le(s); + if( tga_h < 1 ) { + stbi_rewind(s); + return 0; // test height + } + sz = get8(s); // bits per pixel + // only RGB or RGBA or grey allowed + if ((sz != 8) && (sz != 16) && (sz != 24) && (sz != 32)) { + stbi_rewind(s); + return 0; + } + tga_comp = sz; + if (x) *x = tga_w; + if (y) *y = tga_h; + if (comp) *comp = tga_comp / 8; + return 1; // seems to have passed everything +} + +int stbi_tga_info(stbi *s, int *x, int *y, int *comp) +{ + return tga_info(s, x, y, comp); +} + +static int tga_test(stbi *s) +{ + int sz; + get8u(s); // discard Offset + sz = get8u(s); // color type + if ( sz > 1 ) return 0; // only RGB or indexed allowed + sz = get8u(s); // image type + if ( (sz != 1) && (sz != 2) && (sz != 3) && (sz != 9) && (sz != 10) && (sz != 11) ) return 0; // only RGB or grey allowed, +/- RLE + get16(s); // discard palette start + get16(s); // discard palette length + get8(s); // discard bits per palette color entry + get16(s); // discard x origin + get16(s); // discard y origin + if ( get16(s) < 1 ) return 0; // test width + if ( get16(s) < 1 ) return 0; // test height + sz = get8(s); // bits per pixel + if ( (sz != 8) && (sz != 16) && (sz != 24) && (sz != 32) ) return 0; // only RGB or RGBA or grey allowed + return 1; // seems to have passed everything +} + +static int stbi_tga_test(stbi *s) +{ + int res = tga_test(s); + stbi_rewind(s); + return res; +} + +static stbi_uc *tga_load(stbi *s, int *x, int *y, int *comp, int req_comp) +{ + // read in the TGA header stuff + int tga_offset = get8u(s); + int tga_indexed = get8u(s); + int tga_image_type = get8u(s); + int tga_is_RLE = 0; + int tga_palette_start = get16le(s); + int tga_palette_len = get16le(s); + int tga_palette_bits = get8u(s); + int tga_x_origin = get16le(s); + int tga_y_origin = get16le(s); + int tga_width = get16le(s); + int tga_height = get16le(s); + int tga_bits_per_pixel = get8u(s); + int tga_comp = tga_bits_per_pixel / 8; + int tga_inverted = get8u(s); + // image data + unsigned char *tga_data; + unsigned char *tga_palette = NULL; + int i, j; + unsigned char raw_data[4]; + int RLE_count = 0; + int RLE_repeating = 0; + int read_next_pixel = 1; + + // do a tiny bit of precessing + if ( tga_image_type >= 8 ) + { + tga_image_type -= 8; + tga_is_RLE = 1; + } + /* int tga_alpha_bits = tga_inverted & 15; */ + tga_inverted = 1 - ((tga_inverted >> 5) & 1); + + // error check + if ( //(tga_indexed) || + (tga_width < 1) || (tga_height < 1) || + (tga_image_type < 1) || (tga_image_type > 3) || + ((tga_bits_per_pixel != 8) && (tga_bits_per_pixel != 16) && + (tga_bits_per_pixel != 24) && (tga_bits_per_pixel != 32)) + ) + { + return NULL; // we don't report this as a bad TGA because we don't even know if it's TGA + } + + // If I'm paletted, then I'll use the number of bits from the palette + if ( tga_indexed ) + { + tga_comp = tga_palette_bits / 8; + } + + // tga info + *x = tga_width; + *y = tga_height; + if (comp) *comp = tga_comp; + + tga_data = (unsigned char*)malloc( tga_width * tga_height * req_comp ); + if (!tga_data) return epuc("outofmem", "Out of memory"); + + // skip to the data's starting position (offset usually = 0) + skip(s, tga_offset ); + + if ( !tga_indexed && !tga_is_RLE) { + for (i=0; i < tga_height; ++i) { + int y = tga_inverted ? tga_height -i - 1 : i; + stbi__uint8 *tga_row = tga_data + y*tga_width*tga_comp; + getn(s, tga_row, tga_width * tga_comp); + } + } else { + // do I need to load a palette? + if ( tga_indexed) + { + // any data to skip? (offset usually = 0) + skip(s, tga_palette_start ); + // load the palette + tga_palette = (unsigned char*)malloc( tga_palette_len * tga_palette_bits / 8 ); + if (!tga_palette) { + free(tga_data); + return epuc("outofmem", "Out of memory"); + } + if (!getn(s, tga_palette, tga_palette_len * tga_palette_bits / 8 )) { + free(tga_data); + free(tga_palette); + return epuc("bad palette", "Corrupt TGA"); + } + } + // load the data + for (i=0; i < tga_width * tga_height; ++i) + { + // if I'm in RLE mode, do I need to get a RLE chunk? + if ( tga_is_RLE ) + { + if ( RLE_count == 0 ) + { + // yep, get the next byte as a RLE command + int RLE_cmd = get8u(s); + RLE_count = 1 + (RLE_cmd & 127); + RLE_repeating = RLE_cmd >> 7; + read_next_pixel = 1; + } else if ( !RLE_repeating ) + { + read_next_pixel = 1; + } + } else + { + read_next_pixel = 1; + } + // OK, if I need to read a pixel, do it now + if ( read_next_pixel ) + { + // load however much data we did have + if ( tga_indexed ) + { + // read in 1 byte, then perform the lookup + int pal_idx = get8u(s); + if ( pal_idx >= tga_palette_len ) + { + // invalid index + pal_idx = 0; + } + pal_idx *= tga_bits_per_pixel / 8; + for (j = 0; j*8 < tga_bits_per_pixel; ++j) + { + raw_data[j] = tga_palette[pal_idx+j]; + } + } else + { + // read in the data raw + for (j = 0; j*8 < tga_bits_per_pixel; ++j) + { + raw_data[j] = get8u(s); + } + } + // clear the reading flag for the next pixel + read_next_pixel = 0; + } // end of reading a pixel + + // copy data + for (j = 0; j < tga_comp; ++j) + tga_data[i*tga_comp+j] = raw_data[j]; + + // in case we're in RLE mode, keep counting down + --RLE_count; + } + // do I need to invert the image? + if ( tga_inverted ) + { + for (j = 0; j*2 < tga_height; ++j) + { + int index1 = j * tga_width * req_comp; + int index2 = (tga_height - 1 - j) * tga_width * req_comp; + for (i = tga_width * req_comp; i > 0; --i) + { + unsigned char temp = tga_data[index1]; + tga_data[index1] = tga_data[index2]; + tga_data[index2] = temp; + ++index1; + ++index2; + } + } + } + // clear my palette, if I had one + if ( tga_palette != NULL ) + { + free( tga_palette ); + } + } + + // swap RGB + if (tga_comp >= 3) + { + unsigned char* tga_pixel = tga_data; + for (i=0; i < tga_width * tga_height; ++i) + { + unsigned char temp = tga_pixel[0]; + tga_pixel[0] = tga_pixel[2]; + tga_pixel[2] = temp; + tga_pixel += tga_comp; + } + } + + // convert to target component count + if (req_comp && req_comp != tga_comp) + tga_data = convert_format(tga_data, tga_comp, req_comp, tga_width, tga_height); + + // the things I do to get rid of an error message, and yet keep + // Microsoft's C compilers happy... [8^( + tga_palette_start = tga_palette_len = tga_palette_bits = + tga_x_origin = tga_y_origin = 0; + // OK, done + return tga_data; +} + +static stbi_uc *stbi_tga_load(stbi *s, int *x, int *y, int *comp, int req_comp) +{ + return tga_load(s,x,y,comp,req_comp); +} + + +// ************************************************************************************************* +// Radiance RGBE HDR loader +// originally by Nicolas Schulz +#ifndef STBI_NO_HDR +static int hdr_test(stbi *s) +{ + const char *signature = "#?RADIANCE\n"; + int i; + for (i=0; signature[i]; ++i) + if (get8(s) != signature[i]) + return 0; + return 1; +} + +static int stbi_hdr_test(stbi* s) +{ + int r = hdr_test(s); + stbi_rewind(s); + return r; +} + +#define HDR_BUFLEN 1024 +static char *hdr_gettoken(stbi *z, char *buffer) +{ + int len=0; + char c = '\0'; + + c = (char) get8(z); + + while (!at_eof(z) && c != '\n') { + buffer[len++] = c; + if (len == HDR_BUFLEN-1) { + // flush to end of line + while (!at_eof(z) && get8(z) != '\n') + ; + break; + } + c = (char) get8(z); + } + + buffer[len] = 0; + return buffer; +} + +static void hdr_convert(float *output, stbi_uc *input, int req_comp) +{ + if ( input[3] != 0 ) { + float f1; + // Exponent + f1 = (float) ldexp(1.0f, input[3] - (int)(128 + 8)); + if (req_comp <= 2) + output[0] = (input[0] + input[1] + input[2]) * f1 / 3; + else { + output[0] = input[0] * f1; + output[1] = input[1] * f1; + output[2] = input[2] * f1; + } + if (req_comp == 2) output[1] = 1; + if (req_comp == 4) output[3] = 1; + } else { + switch (req_comp) { + case 4: output[3] = 1; /* fallthrough */ + case 3: output[0] = output[1] = output[2] = 0; + break; + case 2: output[1] = 1; /* fallthrough */ + case 1: output[0] = 0; + break; + } + } +} + +static float *hdr_load(stbi *s, int *x, int *y, int *comp, int req_comp) +{ + char buffer[HDR_BUFLEN]; + char *token; + int valid = 0; + int width, height; + stbi_uc *scanline; + float *hdr_data; + int len; + unsigned char count, value; + int i, j, k, c1,c2, z; + + + // Check identifier + if (strcmp(hdr_gettoken(s,buffer), "#?RADIANCE") != 0) + return epf("not HDR", "Corrupt HDR image"); + + // Parse header + for(;;) { + token = hdr_gettoken(s,buffer); + if (token[0] == 0) break; + if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1; + } + + if (!valid) return epf("unsupported format", "Unsupported HDR format"); + + // Parse width and height + // can't use sscanf() if we're not using stdio! + token = hdr_gettoken(s,buffer); + if (strncmp(token, "-Y ", 3)) return epf("unsupported data layout", "Unsupported HDR format"); + token += 3; + height = (int) strtol(token, &token, 10); + while (*token == ' ') ++token; + if (strncmp(token, "+X ", 3)) return epf("unsupported data layout", "Unsupported HDR format"); + token += 3; + width = (int) strtol(token, NULL, 10); + + *x = width; + *y = height; + + *comp = 3; + if (req_comp == 0) req_comp = 3; + + // Read data + hdr_data = (float *) malloc(height * width * req_comp * sizeof(float)); + + // Load image data + // image data is stored as some number of sca + if ( width < 8 || width >= 32768) { + // Read flat data + for (j=0; j < height; ++j) { + for (i=0; i < width; ++i) { + stbi_uc rgbe[4]; + main_decode_loop: + getn(s, rgbe, 4); + hdr_convert(hdr_data + j * width * req_comp + i * req_comp, rgbe, req_comp); + } + } + } else { + // Read RLE-encoded data + scanline = NULL; + + for (j = 0; j < height; ++j) { + c1 = get8(s); + c2 = get8(s); + len = get8(s); + if (c1 != 2 || c2 != 2 || (len & 0x80)) { + // not run-length encoded, so we have to actually use THIS data as a decoded + // pixel (note this can't be a valid pixel--one of RGB must be >= 128) + stbi__uint8 rgbe[4]; + rgbe[0] = (stbi__uint8) c1; + rgbe[1] = (stbi__uint8) c2; + rgbe[2] = (stbi__uint8) len; + rgbe[3] = (stbi__uint8) get8u(s); + hdr_convert(hdr_data, rgbe, req_comp); + i = 1; + j = 0; + free(scanline); + goto main_decode_loop; // yes, this makes no sense + } + len <<= 8; + len |= get8(s); + if (len != width) { free(hdr_data); free(scanline); return epf("invalid decoded scanline length", "corrupt HDR"); } + if (scanline == NULL) scanline = (stbi_uc *) malloc(width * 4); + + for (k = 0; k < 4; ++k) { + i = 0; + while (i < width) { + count = get8u(s); + if (count > 128) { + // Run + value = get8u(s); + count -= 128; + for (z = 0; z < count; ++z) + scanline[i++ * 4 + k] = value; + } else { + // Dump + for (z = 0; z < count; ++z) + scanline[i++ * 4 + k] = get8u(s); + } + } + } + for (i=0; i < width; ++i) + hdr_convert(hdr_data+(j*width + i)*req_comp, scanline + i*4, req_comp); + } + free(scanline); + } + + return hdr_data; +} + +static float *stbi_hdr_load(stbi *s, int *x, int *y, int *comp, int req_comp) +{ + return hdr_load(s,x,y,comp,req_comp); +} + +static int stbi_hdr_info(stbi *s, int *x, int *y, int *comp) +{ + char buffer[HDR_BUFLEN]; + char *token; + int valid = 0; + + if (strcmp(hdr_gettoken(s,buffer), "#?RADIANCE") != 0) { + stbi_rewind( s ); + return 0; + } + + for(;;) { + token = hdr_gettoken(s,buffer); + if (token[0] == 0) break; + if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1; + } + + if (!valid) { + stbi_rewind( s ); + return 0; + } + token = hdr_gettoken(s,buffer); + if (strncmp(token, "-Y ", 3)) { + stbi_rewind( s ); + return 0; + } + token += 3; + *y = (int) strtol(token, &token, 10); + while (*token == ' ') ++token; + if (strncmp(token, "+X ", 3)) { + stbi_rewind( s ); + return 0; + } + token += 3; + *x = (int) strtol(token, NULL, 10); + *comp = 3; + return 1; +} +#endif // STBI_NO_HDR + +static int stbi_bmp_info(stbi *s, int *x, int *y, int *comp) +{ + int hsz; + if (get8(s) != 'B' || get8(s) != 'M') { + stbi_rewind( s ); + return 0; + } + skip(s,12); + hsz = get32le(s); + if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108) { + stbi_rewind( s ); + return 0; + } + if (hsz == 12) { + *x = get16le(s); + *y = get16le(s); + } else { + *x = get32le(s); + *y = get32le(s); + } + if (get16le(s) != 1) { + stbi_rewind( s ); + return 0; + } + *comp = get16le(s) / 8; + return 1; +} + +static int stbi_info_main(stbi *s, int *x, int *y, int *comp) +{ + if (stbi_bmp_info(s, x, y, comp)) + return 1; + #ifndef STBI_NO_HDR + if (stbi_hdr_info(s, x, y, comp)) + return 1; + #endif + // test tga last because it's a crappy test! + if (stbi_tga_info(s, x, y, comp)) + return 1; + return e("unknown image type", "Image not of any known type, or corrupt"); +} + +#ifndef STBI_NO_STDIO +int stbi_info(char const *filename, int *x, int *y, int *comp) +{ + FILE *f = fopen(filename, "rb"); + int result; + if (!f) return e("can't fopen", "Unable to open file"); + result = stbi_info_from_file(f, x, y, comp); + fclose(f); + return result; +} + +int stbi_info_from_file(FILE *f, int *x, int *y, int *comp) +{ + int r; + stbi s; + long pos = ftell(f); + start_file(&s, f); + r = stbi_info_main(&s,x,y,comp); + fseek(f,pos,SEEK_SET); + return r; +} +#endif // !STBI_NO_STDIO + +int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp) +{ + stbi s; + start_mem(&s,buffer,len); + return stbi_info_main(&s,x,y,comp); +} + +int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp) +{ + stbi s; + start_callbacks(&s, (stbi_io_callbacks *) c, user); + return stbi_info_main(&s,x,y,comp); +} + +/* + revision history: + 1.35 (2014-05-27) + various warnings + fix broken STBI_SIMD path + fix bug where stbi_load_from_file no longer left file pointer in correct place + fix broken non-easy path for 32-bit BMP (possibly never used) + TGA optimization by Arseny Kapoulkine + 1.34 (unknown) + use STBI_NOTUSED in resample_row_generic(), fix one more leak in tga failure case + 1.33 (2011-07-14) + make stbi_is_hdr work in STBI_NO_HDR (as specified), minor compiler-friendly improvements + 1.32 (2011-07-13) + support for "info" function for all supported filetypes (SpartanJ) + 1.31 (2011-06-20) + a few more leak fixes, bug in PNG handling (SpartanJ) + 1.30 (2011-06-11) + added ability to load files via callbacks to accomidate custom input streams (Ben Wenger) + removed deprecated format-specific test/load functions + removed support for installable file formats (stbi_loader) -- would have been broken for IO callbacks anyway + error cases in bmp and tga give messages and don't leak (Raymond Barbiero, grisha) + fix inefficiency in decoding 32-bit BMP (David Woo) + 1.29 (2010-08-16) + various warning fixes from Aurelien Pocheville + 1.28 (2010-08-01) + fix bug in GIF palette transparency (SpartanJ) + 1.27 (2010-08-01) + cast-to-stbi__uint8 to fix warnings + 1.26 (2010-07-24) + fix bug in file buffering for PNG reported by SpartanJ + 1.25 (2010-07-17) + refix trans_data warning (Won Chun) + 1.24 (2010-07-12) + perf improvements reading from files on platforms with lock-heavy fgetc() + minor perf improvements for jpeg + deprecated type-specific functions so we'll get feedback if they're needed + attempt to fix trans_data warning (Won Chun) + 1.23 fixed bug in iPhone support + 1.22 (2010-07-10) + removed image *writing* support + stbi_info support from Jetro Lauha + GIF support from Jean-Marc Lienher + iPhone PNG-extensions from James Brown + warning-fixes from Nicolas Schulz and Janez Zemva (i.e. Janez (U+017D)emva) + 1.21 fix use of 'stbi__uint8' in header (reported by jon blow) + 1.20 added support for Softimage PIC, by Tom Seddon + 1.19 bug in interlaced PNG corruption check (found by ryg) + 1.18 2008-08-02 + fix a threading bug (local mutable static) + 1.17 support interlaced PNG + 1.16 major bugfix - convert_format converted one too many pixels + 1.15 initialize some fields for thread safety + 1.14 fix threadsafe conversion bug + header-file-only version (#define STBI_HEADER_FILE_ONLY before including) + 1.13 threadsafe + 1.12 const qualifiers in the API + 1.11 Support installable IDCT, colorspace conversion routines + 1.10 Fixes for 64-bit (don't use "unsigned long") + optimized upsampling by Fabian "ryg" Giesen + 1.09 Fix format-conversion for PSD code (bad global variables!) + 1.08 Thatcher Ulrich's PSD code integrated by Nicolas Schulz + 1.07 attempt to fix C++ warning/errors again + 1.06 attempt to fix C++ warning/errors again + 1.05 fix TGA loading to return correct *comp and use good luminance calc + 1.04 default float alpha is 1, not 255; use 'void *' for stbi_image_free + 1.03 bugfixes to STBI_NO_STDIO, STBI_NO_HDR + 1.02 support for (subset of) HDR files, float interface for preferred access to them + 1.01 fix bug: possible bug in handling right-side up bmps... not sure + fix bug: the stbi_bmp_load() and stbi_tga_load() functions didn't work at all + 1.00 interface to zlib that skips zlib header + 0.99 correct handling of alpha in palette + 0.98 TGA loader by lonesock; dynamically add loaders (untested) + 0.97 jpeg errors on too large a file; also catch another malloc failure + 0.96 fix detection of invalid v value - particleman@mollyrocket forum + 0.95 during header scan, seek to markers in case of padding + 0.94 STBI_NO_STDIO to disable stdio usage; rename all #defines the same + 0.93 handle jpegtran output; verbose errors + 0.92 read 4,8,16,24,32-bit BMP files of several formats + 0.91 output 24-bit Windows 3.0 BMP files + 0.90 fix a few more warnings; bump version number to approach 1.0 + 0.61 bugfixes due to Marc LeBlanc, Christopher Lloyd + 0.60 fix compiling as c++ + 0.59 fix warnings: merge Dave Moore's -Wall fixes + 0.58 fix bug: zlib uncompressed mode len/nlen was wrong endian + 0.57 fix bug: jpg last huffman symbol before marker was >9 bits but less than 16 available + 0.56 fix bug: zlib uncompressed mode len vs. nlen + 0.55 fix bug: restart_interval not initialized to 0 + 0.54 allow NULL for 'int *comp' + 0.53 fix bug in png 3->4; speedup png decoding + 0.52 png handles req_comp=3,4 directly; minor cleanup; jpeg comments + 0.51 obey req_comp requests, 1-component jpegs return as 1-component, + on 'test' only check type, not whether we support this variant + 0.50 first released version +*/ diff --git a/src/libraries/stb/stb_image.h b/src/libraries/stb/stb_image.h new file mode 100644 index 000000000..0cddce295 --- /dev/null +++ b/src/libraries/stb/stb_image.h @@ -0,0 +1,302 @@ +/* stbi-1.35 - public domain JPEG/PNG reader - http://nothings.org/stb_image.c + when you control the images you're loading + no warranty implied; use at your own risk + + QUICK NOTES: + Primarily of interest to game developers and other people who can + avoid problematic images and only need the trivial interface + + JPEG baseline (no JPEG progressive) + PNG 8-bit-per-channel only + + TGA (not sure what subset, if a subset) + BMP non-1bpp, non-RLE + PSD (composited view only, no extra channels) + + GIF (*comp always reports as 4-channel) + HDR (radiance rgbE format) + PIC (Softimage PIC) + + - decode from memory or through FILE (define STBI_NO_STDIO to remove code) + - decode from arbitrary I/O callbacks + - overridable dequantizing-IDCT, YCbCr-to-RGB conversion (define STBI_SIMD) + + Latest revisions: + 1.35 (2014-05-27) warnings, bugfixes, TGA optimization, etc + 1.34 (unknown ) warning fix + 1.33 (2011-07-14) minor fixes suggested by Dave Moore + 1.32 (2011-07-13) info support for all filetypes (SpartanJ) + 1.31 (2011-06-19) a few more leak fixes, bug in PNG handling (SpartanJ) + 1.30 (2011-06-11) added ability to load files via io callbacks (Ben Wenger) + 1.29 (2010-08-16) various warning fixes from Aurelien Pocheville + 1.28 (2010-08-01) fix bug in GIF palette transparency (SpartanJ) + + See end of file for full revision history. + + TODO: + stbi_info support for BMP,PSD,HDR,PIC + + + ============================ Contributors ========================= + + Image formats Bug fixes & warning fixes + Sean Barrett (jpeg, png, bmp) Marc LeBlanc + Nicolas Schulz (hdr, psd) Christpher Lloyd + Jonathan Dummer (tga) Dave Moore + Jean-Marc Lienher (gif) Won Chun + Tom Seddon (pic) the Horde3D community + Thatcher Ulrich (psd) Janez Zemva + Jonathan Blow + Laurent Gomila + Extensions, features Aruelien Pocheville + Jetro Lauha (stbi_info) Ryamond Barbiero + James "moose2000" Brown (iPhone PNG) David Woo + Ben "Disch" Wenger (io callbacks) Roy Eltham + Martin "SpartanJ" Golini Luke Graham + Thomas Ruf + John Bartholomew + Optimizations & bugfixes Ken Hamada + Fabian "ryg" Giesen Cort Stratton + Arseny Kapoulkine Blazej Dariusz Roszkowski + Thibault Reuille + If your name should be here but Paul Du Bois + isn't let Sean know. Guillaume George + +*/ + +/* Modified by Alex Szpakowski to remove all decoding functionality except for + TGA and BMP formats. +*/ + +#ifndef STBI_INCLUDE_STB_IMAGE_H +#define STBI_INCLUDE_STB_IMAGE_H + +#define STBI_NO_HDR +#define STBI_NO_STDIO + +//// begin header file //////////////////////////////////////////////////// +// +// Limitations: +// - no jpeg progressive support +// - non-HDR formats support 8-bit samples only (jpeg, png) +// - no delayed line count (jpeg) -- IJG doesn't support either +// - no 1-bit BMP +// - GIF always returns *comp=4 +// +// Basic usage (see HDR discussion below): +// int x,y,n; +// unsigned char *data = stbi_load(filename, &x, &y, &n, 0); +// // ... process data if not NULL ... +// // ... x = width, y = height, n = # 8-bit components per pixel ... +// // ... replace '0' with '1'..'4' to force that many components per pixel +// // ... but 'n' will always be the number that it would have been if you said 0 +// stbi_image_free(data) +// +// Standard parameters: +// int *x -- outputs image width in pixels +// int *y -- outputs image height in pixels +// int *comp -- outputs # of image components in image file +// int req_comp -- if non-zero, # of image components requested in result +// +// The return value from an image loader is an 'unsigned char *' which points +// to the pixel data. The pixel data consists of *y scanlines of *x pixels, +// with each pixel consisting of N interleaved 8-bit components; the first +// pixel pointed to is top-left-most in the image. There is no padding between +// image scanlines or between pixels, regardless of format. The number of +// components N is 'req_comp' if req_comp is non-zero, or *comp otherwise. +// If req_comp is non-zero, *comp has the number of components that _would_ +// have been output otherwise. E.g. if you set req_comp to 4, you will always +// get RGBA output, but you can check *comp to easily see if it's opaque. +// +// An output image with N components has the following components interleaved +// in this order in each pixel: +// +// N=#comp components +// 1 grey +// 2 grey, alpha +// 3 red, green, blue +// 4 red, green, blue, alpha +// +// If image loading fails for any reason, the return value will be NULL, +// and *x, *y, *comp will be unchanged. The function stbi_failure_reason() +// can be queried for an extremely brief, end-user unfriendly explanation +// of why the load failed. Define STBI_NO_FAILURE_STRINGS to avoid +// compiling these strings at all, and STBI_FAILURE_USERMSG to get slightly +// more user-friendly ones. +// +// Paletted PNG, BMP, GIF, and PIC images are automatically depalettized. +// +// =========================================================================== +// +// iPhone PNG support: +// +// By default we convert iphone-formatted PNGs back to RGB; nominally they +// would silently load as BGR, except the existing code should have just +// failed on such iPhone PNGs. But you can disable this conversion by +// by calling stbi_convert_iphone_png_to_rgb(0), in which case +// you will always just get the native iphone "format" through. +// +// Call stbi_set_unpremultiply_on_load(1) as well to force a divide per +// pixel to remove any premultiplied alpha *only* if the image file explicitly +// says there's premultiplied data (currently only happens in iPhone images, +// and only if iPhone convert-to-rgb processing is on). +// +// =========================================================================== +// +// HDR image support (disable by defining STBI_NO_HDR) +// +// stb_image now supports loading HDR images in general, and currently +// the Radiance .HDR file format, although the support is provided +// generically. You can still load any file through the existing interface; +// if you attempt to load an HDR file, it will be automatically remapped to +// LDR, assuming gamma 2.2 and an arbitrary scale factor defaulting to 1; +// both of these constants can be reconfigured through this interface: +// +// stbi_hdr_to_ldr_gamma(2.2f); +// stbi_hdr_to_ldr_scale(1.0f); +// +// (note, do not use _inverse_ constants; stbi_image will invert them +// appropriately). +// +// Additionally, there is a new, parallel interface for loading files as +// (linear) floats to preserve the full dynamic range: +// +// float *data = stbi_loadf(filename, &x, &y, &n, 0); +// +// If you load LDR images through this interface, those images will +// be promoted to floating point values, run through the inverse of +// constants corresponding to the above: +// +// stbi_ldr_to_hdr_scale(1.0f); +// stbi_ldr_to_hdr_gamma(2.2f); +// +// Finally, given a filename (or an open file or memory block--see header +// file for details) containing image data, you can query for the "most +// appropriate" interface to use (that is, whether the image is HDR or +// not), using: +// +// stbi_is_hdr(char *filename); +// +// =========================================================================== +// +// I/O callbacks +// +// I/O callbacks allow you to read from arbitrary sources, like packaged +// files or some other source. Data read from callbacks are processed +// through a small internal buffer (currently 128 bytes) to try to reduce +// overhead. +// +// The three functions you must define are "read" (reads some bytes of data), +// "skip" (skips some bytes of data), "eof" (reports if the stream is at the end). + + +#ifndef STBI_NO_STDIO + +#if defined(_MSC_VER) && _MSC_VER >= 1400 +#define _CRT_SECURE_NO_WARNINGS // suppress warnings about fopen() +#pragma warning(push) +#pragma warning(disable:4996) // suppress even more warnings about fopen() +#endif +#include +#endif // STBI_NO_STDIO + +#define STBI_VERSION 1 + +enum +{ + STBI_default = 0, // only used for req_comp + + STBI_grey = 1, + STBI_grey_alpha = 2, + STBI_rgb = 3, + STBI_rgb_alpha = 4 +}; + +typedef unsigned char stbi_uc; + +#ifdef __cplusplus +extern "C" { +#endif + +////////////////////////////////////////////////////////////////////////////// +// +// PRIMARY API - works on images of any type +// + +// +// load image by filename, open file, or memory buffer +// + +extern stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); + +#ifndef STBI_NO_STDIO +extern stbi_uc *stbi_load (char const *filename, int *x, int *y, int *comp, int req_comp); +extern stbi_uc *stbi_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); +// for stbi_load_from_file, file pointer is left pointing immediately after image +#endif + +typedef struct +{ + int (*read) (void *user,char *data,int size); // fill 'data' with 'size' bytes. return number of bytes actually read + void (*skip) (void *user,int n); // skip the next 'n' bytes, or 'unget' the last -n bytes if negative + int (*eof) (void *user); // returns nonzero if we are at end of file/data +} stbi_io_callbacks; + +extern stbi_uc *stbi_load_from_callbacks (stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp); + +#ifndef STBI_NO_HDR + extern float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); + + #ifndef STBI_NO_STDIO + extern float *stbi_loadf (char const *filename, int *x, int *y, int *comp, int req_comp); + extern float *stbi_loadf_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); + #endif + + extern float *stbi_loadf_from_callbacks (stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp); + + extern void stbi_hdr_to_ldr_gamma(float gamma); + extern void stbi_hdr_to_ldr_scale(float scale); + + extern void stbi_ldr_to_hdr_gamma(float gamma); + extern void stbi_ldr_to_hdr_scale(float scale); +#endif // STBI_NO_HDR + +// stbi_is_hdr is always defined +extern int stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user); +extern int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len); +#ifndef STBI_NO_STDIO +extern int stbi_is_hdr (char const *filename); +extern int stbi_is_hdr_from_file(FILE *f); +#endif // STBI_NO_STDIO + + +// get a VERY brief reason for failure +// NOT THREADSAFE +extern const char *stbi_failure_reason (void); + +// free the loaded image -- this is just free() +extern void stbi_image_free (void *retval_from_stbi_load); + +// get image dimensions & components without fully decoding +extern int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp); +extern int stbi_info_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp); + +#ifndef STBI_NO_STDIO +extern int stbi_info (char const *filename, int *x, int *y, int *comp); +extern int stbi_info_from_file (FILE *f, int *x, int *y, int *comp); + +#endif + + +#ifdef __cplusplus +} +#endif + +#if !defined(STBI_NO_STDIO) && defined(_MSC_VER) && _MSC_VER >= 1400 +#pragma warning(pop) +#endif + +// +// +//// end header file ///////////////////////////////////////////////////// +#endif // STBI_INCLUDE_STB_IMAGE_H diff --git a/src/modules/image/magpie/Image.cpp b/src/modules/image/magpie/Image.cpp index 304b0f2af..2537495b0 100644 --- a/src/modules/image/magpie/Image.cpp +++ b/src/modules/image/magpie/Image.cpp @@ -25,6 +25,7 @@ #include "JPEGHandler.h" #include "PNGHandler.h" +#include "STBHandler.h" namespace love { @@ -37,6 +38,7 @@ Image::Image() { formatHandlers.push_back(new PNGHandler); formatHandlers.push_back(new JPEGHandler); + formatHandlers.push_back(new STBHandler); } Image::~Image() diff --git a/src/modules/image/magpie/JPEGHandler.h b/src/modules/image/magpie/JPEGHandler.h index b95ee8859..14e4383f1 100644 --- a/src/modules/image/magpie/JPEGHandler.h +++ b/src/modules/image/magpie/JPEGHandler.h @@ -22,7 +22,6 @@ #define LOVE_IMAGE_MAGPIE_JPEG_HANDLER_H // LOVE -#include "filesystem/FileData.h" #include "FormatHandler.h" #include "thread/threads.h" diff --git a/src/modules/image/magpie/PNGHandler.h b/src/modules/image/magpie/PNGHandler.h index 8954f93fd..74f7f4753 100644 --- a/src/modules/image/magpie/PNGHandler.h +++ b/src/modules/image/magpie/PNGHandler.h @@ -22,7 +22,6 @@ #define LOVE_IMAGE_MAGPIE_PNG_HANDLER_H // LOVE -#include "filesystem/FileData.h" #include "FormatHandler.h" namespace love diff --git a/src/modules/image/magpie/STBHandler.cpp b/src/modules/image/magpie/STBHandler.cpp new file mode 100644 index 000000000..a73bfa097 --- /dev/null +++ b/src/modules/image/magpie/STBHandler.cpp @@ -0,0 +1,138 @@ +/** + * Copyright (c) 2006-2014 LOVE Development Team + * + * This software is provided 'as-is', without any express or implied + * warranty. In no event will the authors be held liable for any damages + * arising from the use of this software. + * + * Permission is granted to anyone to use this software for any purpose, + * including commercial applications, and to alter it and redistribute it + * freely, subject to the following restrictions: + * + * 1. The origin of this software must not be misrepresented; you must not + * claim that you wrote the original software. If you use this software + * in a product, an acknowledgment in the product documentation would be + * appreciated but is not required. + * 2. Altered source versions must be plainly marked as such, and must not be + * misrepresented as being the original software. + * 3. This notice may not be removed or altered from any source distribution. + **/ + +// LOVE +#include "STBHandler.h" + +// stb_image +#include "libraries/stb/stb_image.h" + +// C++ +#include + +namespace love +{ +namespace image +{ +namespace magpie +{ + +bool STBHandler::canDecode(love::filesystem::FileData *data) +{ + std::string ext = data->getExtension(); + std::transform(ext.begin(), ext.end(), ext.begin(), tolower); + + return (ext.compare("tga") == 0) || (ext.compare("bmp") == 0); +} + +bool STBHandler::canEncode(ImageData::Format format) +{ + return format == ImageData::FORMAT_TGA; +} + +FormatHandler::DecodedImage STBHandler::decode(love::filesystem::FileData *data) +{ + DecodedImage img; + + int comp = 0; + img.data = stbi_load_from_memory((const stbi_uc *) data->getData(), + (int) data->getSize(), + &img.width, &img.height, + &comp, 4); + + if (img.data == nullptr || img.width <= 0 || img.height <= 0) + throw love::Exception("Could not decode TGA or BMP image."); + + img.size = img.width * img.height * 4; + + return img; +} + +FormatHandler::EncodedImage STBHandler::encode(const DecodedImage &img, ImageData::Format format) +{ + if (!canEncode(format)) + throw love::Exception("Invalid format."); + + // We don't actually use stb_image for encoding, but this code is small + // enough that it might as well stay here. + + EncodedImage encimg; + + const size_t headerlen = 18; + const size_t bpp = 4; + + encimg.size = (img.width * img.height * bpp) + headerlen; + + // We need to use malloc because we use stb_image_free (which uses free()) + // as our custom free() function, which is called by the ImageData after + // encode() is complete. + // stb_image's source code is compiled with this source, so calling malloc() + // directly is fine. + encimg.data = (unsigned char *) malloc(encimg.size); + + if (encimg.data == nullptr) + throw love::Exception("Out of memory."); + + // here's the header for the Targa file format. + encimg.data[0] = 0; // ID field size + encimg.data[1] = 0; // colormap type + encimg.data[2] = 2; // image type + encimg.data[3] = encimg.data[4] = 0; // colormap start + encimg.data[5] = encimg.data[6] = 0; // colormap length + encimg.data[7] = 32; // colormap bits + encimg.data[8] = encimg.data[9] = 0; // x origin + encimg.data[10] = encimg.data[11] = 0; // y origin + // Targa is little endian, so: + encimg.data[12] = img.width & 255; // least significant byte of width + encimg.data[13] = img.width >> 8; // most significant byte of width + encimg.data[14] = img.height & 255; // least significant byte of height + encimg.data[15] = img.height >> 8; // most significant byte of height + encimg.data[16] = bpp * 8; // bits per pixel + encimg.data[17] = 0x20; // descriptor bits (flip bits: 0x10 horizontal, 0x20 vertical) + + // header done. write the pixel data to TGA: + memcpy(encimg.data + headerlen, img.data, img.width * img.height * bpp); + + // convert the pixels from RGBA to BGRA. + pixel *encodedpixels = (pixel *) (encimg.data + headerlen); + for (int y = 0; y < img.height; y++) + { + for (int x = 0; x < img.width; x++) + { + unsigned char r = encodedpixels[y * img.width + x].r; + unsigned char b = encodedpixels[y * img.width + x].b; + encodedpixels[y * img.width + x].r = b; + encodedpixels[y * img.width + x].b = r; + } + } + + return encimg; +} + +void STBHandler::free(unsigned char *mem) +{ + // The STB decoder gave memory allocated directly by stb_image to the + // ImageData, so we use stb_image_free to delete it. + stbi_image_free(mem); +} + +} // magpie +} // image +} // love diff --git a/src/modules/image/magpie/STBHandler.h b/src/modules/image/magpie/STBHandler.h new file mode 100644 index 000000000..0c51e4d4c --- /dev/null +++ b/src/modules/image/magpie/STBHandler.h @@ -0,0 +1,61 @@ +/** + * Copyright (c) 2006-2014 LOVE Development Team + * + * This software is provided 'as-is', without any express or implied + * warranty. In no event will the authors be held liable for any damages + * arising from the use of this software. + * + * Permission is granted to anyone to use this software for any purpose, + * including commercial applications, and to alter it and redistribute it + * freely, subject to the following restrictions: + * + * 1. The origin of this software must not be misrepresented; you must not + * claim that you wrote the original software. If you use this software + * in a product, an acknowledgment in the product documentation would be + * appreciated but is not required. + * 2. Altered source versions must be plainly marked as such, and must not be + * misrepresented as being the original software. + * 3. This notice may not be removed or altered from any source distribution. + **/ + +#ifndef LOVE_IMAGE_MAGPIE_STB_HANDLER_H +#define LOVE_IMAGE_MAGPIE_STB_HANDLER_H + +#include "FormatHandler.h" + +namespace love +{ +namespace image +{ +namespace magpie +{ + +/** + * Interface between ImageData and the stb_image library, for decoding TGA and + * BMP images. + * + * We could use stb_image to decode PNG and JPEG as well, but performance and + * comprehensive format support is lacking compared to some alternatives, plus + * stb_image_write doesn't have JPEG support. + **/ +class STBHandler : public FormatHandler +{ +public: + + // Implements FormatHandler. + + virtual bool canDecode(love::filesystem::FileData *data); + virtual bool canEncode(ImageData::Format format); + + virtual DecodedImage decode(love::filesystem::FileData *data); + virtual EncodedImage encode(const DecodedImage &img, ImageData::Format format); + + virtual void free(unsigned char *mem); + +}; // STBHandler + +} // magpie +} // image +} // love + +#endif // LOVE_IMAGE_MAGPIE_STB_HANDLER_H