diff --git a/srcpkgs/catimg/patches/CVE-2018-13794.patch b/srcpkgs/catimg/patches/CVE-2018-13794.patch new file mode 100644 index 0000000000..4018570461 --- /dev/null +++ b/srcpkgs/catimg/patches/CVE-2018-13794.patch @@ -0,0 +1,5157 @@ +From 08de16788649705d93cbdf98788efd70d208e1d1 Mon Sep 17 00:00:00 2001 +From: Tianxiao Gu +Date: Tue, 11 Sep 2018 17:50:20 -0700 +Subject: [PATCH 1/5] Upgrade to stb_image v2.19 + +--- + src/sh_image.c | 5 +- + src/stb_image.h | 2882 ++++++++++++++++++++++++++++++----------------- + 2 files changed, 1882 insertions(+), 1005 deletions(-) + +diff --git a/src/sh_image.c b/src/sh_image.c +index 11c97b3..d69e96d 100644 +--- src/sh_image.c ++++ src/sh_image.c +@@ -24,7 +24,7 @@ STBIDEF unsigned char *stbi__xload_main(stbi__context *s, int *x, int *y, int *f + + *frames = 0; + +- while ((gr->data = stbi__gif_load_next(s, &g, channels, 4))) { ++ while ((gr->data = stbi__gif_load_next(s, &g, channels, 4, 0))) { + if (gr->data == (unsigned char*)s) { + gr->data = 0; + break; +@@ -69,7 +69,8 @@ STBIDEF unsigned char *stbi__xload_main(stbi__context *s, int *x, int *y, int *f + } + } + } else { +- result = stbi__load_main(s, x, y, channels, 0); ++ stbi__result_info ri; ++ result = stbi__load_main(s, x, y, channels, 0, &ri, 8); + *frames = !!result; + } + +diff --git a/src/stb_image.h b/src/stb_image.h +index 8764286..d9c21bc 100644 +--- src/stb_image.h ++++ src/stb_image.h +@@ -1,5 +1,5 @@ +-/* stb_image - v2.06 - public domain image loader - http://nothings.org/stb_image.h +- no warranty implied; use at your own risk ++/* stb_image - v2.19 - public domain image loader - http://nothings.org/stb ++ no warranty implied; use at your own risk + + Do this: + #define STB_IMAGE_IMPLEMENTATION +@@ -21,17 +21,20 @@ + avoid problematic images and only need the trivial interface + + JPEG baseline & progressive (12 bpc/arithmetic not supported, same as stock IJG lib) +- PNG 1/2/4/8-bit-per-channel (16 bpc not supported) ++ PNG 1/2/4/8/16-bit-per-channel + + TGA (not sure what subset, if a subset) + BMP non-1bpp, non-RLE +- PSD (composited view only, no extra channels) ++ PSD (composited view only, no extra channels, 8/16 bit-per-channel) + + GIF (*comp always reports as 4-channel) + HDR (radiance rgbE format) + PIC (Softimage PIC) + PNM (PPM and PGM binary only) + ++ Animated GIF still needs a proper API, but here's one way to do it: ++ http://gist.github.com/urraka/685d9a6340b26b830d49 ++ + - decode from memory or through FILE (define STBI_NO_STDIO to remove code) + - decode from arbitrary I/O callbacks + - SIMD acceleration on x86/x64 (SSE2) and ARM (NEON) +@@ -39,178 +42,65 @@ + Full documentation under "DOCUMENTATION" below. + + +- Revision 2.00 release notes: +- +- - Progressive JPEG is now supported. +- +- - PPM and PGM binary formats are now supported, thanks to Ken Miller. +- +- - x86 platforms now make use of SSE2 SIMD instructions for +- JPEG decoding, and ARM platforms can use NEON SIMD if requested. +- This work was done by Fabian "ryg" Giesen. SSE2 is used by +- default, but NEON must be enabled explicitly; see docs. +- +- With other JPEG optimizations included in this version, we see +- 2x speedup on a JPEG on an x86 machine, and a 1.5x speedup +- on a JPEG on an ARM machine, relative to previous versions of this +- library. The same results will not obtain for all JPGs and for all +- x86/ARM machines. (Note that progressive JPEGs are significantly +- slower to decode than regular JPEGs.) This doesn't mean that this +- is the fastest JPEG decoder in the land; rather, it brings it +- closer to parity with standard libraries. If you want the fastest +- decode, look elsewhere. (See "Philosophy" section of docs below.) +- +- See final bullet items below for more info on SIMD. +- +- - Added STBI_MALLOC, STBI_REALLOC, and STBI_FREE macros for replacing +- the memory allocator. Unlike other STBI libraries, these macros don't +- support a context parameter, so if you need to pass a context in to +- the allocator, you'll have to store it in a global or a thread-local +- variable. +- +- - Split existing STBI_NO_HDR flag into two flags, STBI_NO_HDR and +- STBI_NO_LINEAR. +- STBI_NO_HDR: suppress implementation of .hdr reader format +- STBI_NO_LINEAR: suppress high-dynamic-range light-linear float API +- +- - You can suppress implementation of any of the decoders to reduce +- your code footprint by #defining one or more of the following +- symbols before creating the implementation. +- +- STBI_NO_JPEG +- STBI_NO_PNG +- STBI_NO_BMP +- STBI_NO_PSD +- STBI_NO_TGA +- STBI_NO_GIF +- STBI_NO_HDR +- STBI_NO_PIC +- STBI_NO_ICO +- STBI_NO_PNM (.ppm and .pgm) +- +- - You can request *only* certain decoders and suppress all other ones +- (this will be more forward-compatible, as addition of new decoders +- doesn't require you to disable them explicitly): +- +- STBI_ONLY_JPEG +- STBI_ONLY_PNG +- STBI_ONLY_BMP +- STBI_ONLY_PSD +- STBI_ONLY_TGA +- STBI_ONLY_GIF +- STBI_ONLY_HDR +- STBI_ONLY_PIC +- STBI_ONLY_ICO +- STBI_ONLY_PNM (.ppm and .pgm) +- +- Note that you can define multiples of these, and you will get all +- of them ("only x" and "only y" is interpreted to mean "only x&y"). +- +- - If you use STBI_NO_PNG (or _ONLY_ without PNG), and you still +- want the zlib decoder to be available, #define STBI_SUPPORT_ZLIB +- +- - Compilation of all SIMD code can be suppressed with +- #define STBI_NO_SIMD +- It should not be necessary to disable SIMD unless you have issues +- compiling (e.g. using an x86 compiler which doesn't support SSE +- intrinsics or that doesn't support the method used to detect +- SSE2 support at run-time), and even those can be reported as +- bugs so I can refine the built-in compile-time checking to be +- smarter. +- +- - The old STBI_SIMD system which allowed installing a user-defined +- IDCT etc. has been removed. If you need this, don't upgrade. My +- assumption is that almost nobody was doing this, and those who +- were will find the built-in SIMD more satisfactory anyway. +- +- - RGB values computed for JPEG images are slightly different from +- previous versions of stb_image. (This is due to using less +- integer precision in SIMD.) The C code has been adjusted so +- that the same RGB values will be computed regardless of whether +- SIMD support is available, so your app should always produce +- consistent results. But these results are slightly different from +- previous versions. (Specifically, about 3% of available YCbCr values +- will compute different RGB results from pre-1.49 versions by +-1; +- most of the deviating values are one smaller in the G channel.) +- +- - If you must produce consistent results with previous versions of +- stb_image, #define STBI_JPEG_OLD and you will get the same results +- you used to; however, you will not get the SIMD speedups for +- the YCbCr-to-RGB conversion step (although you should still see +- significant JPEG speedup from the other changes). +- +- Please note that STBI_JPEG_OLD is a temporary feature; it will be +- removed in future versions of the library. It is only intended for +- near-term back-compatibility use. +- +- +- Latest revision history: +- 2.06 (2015-04-19) fix bug where PSD returns wrong '*comp' value +- 2.05 (2015-04-19) fix bug in progressive JPEG handling, fix warning +- 2.04 (2015-04-15) try to re-enable SIMD on MinGW 64-bit +- 2.03 (2015-04-12) additional corruption checking +- stbi_set_flip_vertically_on_load +- fix NEON support; fix mingw support +- 2.02 (2015-01-19) fix incorrect assert, fix warning +- 2.01 (2015-01-17) fix various warnings +- 2.00b (2014-12-25) fix STBI_MALLOC in progressive JPEG +- 2.00 (2014-12-25) optimize JPEG, including x86 SSE2 & ARM NEON SIMD +- progressive JPEG +- PGM/PPM support +- STBI_MALLOC,STBI_REALLOC,STBI_FREE +- STBI_NO_*, STBI_ONLY_* +- GIF bugfix +- 1.48 (2014-12-14) fix incorrectly-named assert() +- 1.47 (2014-12-14) 1/2/4-bit PNG support (both grayscale and paletted) +- optimize PNG +- fix bug in interlaced PNG with user-specified channel count ++LICENSE ++ ++ See end of file for license information. ++ ++RECENT REVISION HISTORY: ++ ++ 2.19 (2018-02-11) fix warning ++ 2.18 (2018-01-30) fix warnings ++ 2.17 (2018-01-29) bugfix, 1-bit BMP, 16-bitness query, fix warnings ++ 2.16 (2017-07-23) all functions have 16-bit variants; optimizations; bugfixes ++ 2.15 (2017-03-18) fix png-1,2,4; all Imagenet JPGs; no runtime SSE detection on GCC ++ 2.14 (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs ++ 2.13 (2016-12-04) experimental 16-bit API, only for PNG so far; fixes ++ 2.12 (2016-04-02) fix typo in 2.11 PSD fix that caused crashes ++ 2.11 (2016-04-02) 16-bit PNGS; enable SSE2 in non-gcc x64 ++ RGB-format JPEG; remove white matting in PSD; ++ allocate large structures on the stack; ++ correct channel count for PNG & BMP ++ 2.10 (2016-01-22) avoid warning introduced in 2.09 ++ 2.09 (2016-01-16) 16-bit TGA; comments in PNM files; STBI_REALLOC_SIZED + + See end of file for full revision history. + + + ============================ 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 +- Ken Miller (pgm, ppm) Jonathan Blow +- Laurent Gomila +- Aruelien Pocheville +- Extensions, features Ryamond Barbiero +- Jetro Lauha (stbi_info) David Woo +- Martin "SpartanJ" Golini (stbi_info) Martin Golini +- James "moose2000" Brown (iPhone PNG) Roy Eltham +- Ben "Disch" Wenger (io callbacks) Luke Graham +- Omar Cornut (1/2/4-bit PNG) Thomas Ruf +- Nicolas Guillemot (vertical flip) John Bartholomew +- Ken Hamada +- Optimizations & bugfixes Cort Stratton +- Fabian "ryg" Giesen Blazej Dariusz Roszkowski +- Arseny Kapoulkine Thibault Reuille +- Paul Du Bois +- Guillaume George +- If your name should be here but Jerry Jansson +- isn't, let Sean know. Hayaki Saito +- Johan Duparc +- Ronny Chevalier +- Michal Cichon +- Tero Hanninen +- Sergio Gonzalez +- Cass Everitt +- Engin Manap +- Martins Mozeiko +- Joseph Thomson +- Phil Jordan +- +-License: +- This software is in the public domain. Where that dedication is not +- recognized, you are granted a perpetual, irrevocable license to copy +- and modify this file however you want. +- ++ Image formats Extensions, features ++ Sean Barrett (jpeg, png, bmp) Jetro Lauha (stbi_info) ++ Nicolas Schulz (hdr, psd) Martin "SpartanJ" Golini (stbi_info) ++ Jonathan Dummer (tga) James "moose2000" Brown (iPhone PNG) ++ Jean-Marc Lienher (gif) Ben "Disch" Wenger (io callbacks) ++ Tom Seddon (pic) Omar Cornut (1/2/4-bit PNG) ++ Thatcher Ulrich (psd) Nicolas Guillemot (vertical flip) ++ Ken Miller (pgm, ppm) Richard Mitton (16-bit PSD) ++ github:urraka (animated gif) Junggon Kim (PNM comments) ++ Christopher Forseth (animated gif) Daniel Gibson (16-bit TGA) ++ socks-the-fox (16-bit PNG) ++ Jeremy Sawicki (handle all ImageNet JPGs) ++ Optimizations & bugfixes Mikhail Morozov (1-bit BMP) ++ Fabian "ryg" Giesen Anael Seghezzi (is-16-bit query) ++ Arseny Kapoulkine ++ John-Mark Allen ++ ++ Bug & warning fixes ++ Marc LeBlanc David Woo Guillaume George Martins Mozeiko ++ Christpher Lloyd Jerry Jansson Joseph Thomson Phil Jordan ++ Dave Moore Roy Eltham Hayaki Saito Nathan Reed ++ Won Chun Luke Graham Johan Duparc Nick Verigakis ++ the Horde3D community Thomas Ruf Ronny Chevalier github:rlyeh ++ Janez Zemva John Bartholomew Michal Cichon github:romigrou ++ Jonathan Blow Ken Hamada Tero Hanninen github:svdijk ++ Laurent Gomila Cort Stratton Sergio Gonzalez github:snagar ++ Aruelien Pocheville Thibault Reuille Cass Everitt github:Zelex ++ Ryamond Barbiero Paul Du Bois Engin Manap github:grim210 ++ Aldo Culquicondor Philipp Wiesemann Dale Weiler github:sammyhw ++ Oriol Ferrer Mesia Josh Tobin Matthew Gregan github:phprus ++ Julian Raschke Gregory Mullen Baldur Karlsson github:poppolopoppo ++ Christian Floisand Kevin Schmidt github:darealshinji ++ Blazej Dariusz Roszkowski github:Michaelangel007 + */ + + #ifndef STBI_INCLUDE_STB_IMAGE_H +@@ -219,10 +109,8 @@ + // DOCUMENTATION + // + // Limitations: +-// - no 16-bit-per-channel PNG + // - no 12-bit-per-channel JPEG + // - no JPEGs with arithmetic coding +-// - no 1-bit BMP + // - GIF always returns *comp=4 + // + // Basic usage (see HDR discussion below for HDR usage): +@@ -235,10 +123,10 @@ + // 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 ++// int *x -- outputs image width in pixels ++// int *y -- outputs image height in pixels ++// int *channels_in_file -- outputs # of image components in image file ++// int desired_channels -- 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, or NULL on an allocation failure or if the image is +@@ -246,11 +134,12 @@ + // 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 see if it's trivially opaque +-// because e.g. there were only 3 channels in the source image. ++// components N is 'desired_channels' if desired_channels is non-zero, or ++// *channels_in_file otherwise. If desired_channels is non-zero, ++// *channels_in_file has the number of components that _would_ have been ++// output otherwise. E.g. if you set desired_channels to 4, you will always ++// get RGBA output, but you can check *channels_in_file to see if it's trivially ++// opaque because e.g. there were only 3 channels in the source image. + // + // An output image with N components has the following components interleaved + // in this order in each pixel: +@@ -262,10 +151,10 @@ + // 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 ++// and *x, *y, *channels_in_file 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. +@@ -284,13 +173,13 @@ + // and for best performance I may provide less-easy-to-use APIs that give higher + // performance, in addition to the easy to use ones. Nevertheless, it's important + // to keep in mind that from the standpoint of you, a client of this library, +-// all you care about is #1 and #3, and stb libraries do not emphasize #3 above all. ++// all you care about is #1 and #3, and stb libraries DO NOT emphasize #3 above all. + // + // Some secondary priorities arise directly from the first two, some of which + // make more explicit reasons why performance can't be emphasized. + // + // - Portable ("ease of use") +-// - Small footprint ("easy to maintain") ++// - Small source code footprint ("easy to maintain") + // - No dependencies ("ease of use") + // + // =========================================================================== +@@ -322,13 +211,6 @@ + // (at least this is true for iOS and Android). Therefore, the NEON support is + // toggled by a build flag: define STBI_NEON to get NEON loops. + // +-// The output of the JPEG decoder is slightly different from versions where +-// SIMD support was introduced (that is, for versions before 1.49). The +-// difference is only +-1 in the 8-bit RGB channels, and only on a small +-// fraction of pixels. You can force the pre-1.49 behavior by defining +-// STBI_JPEG_OLD, but this will disable some of the SIMD decoding path +-// and hence cost some performance. +-// + // If for some reason you do not want to use any of SIMD code, or if + // you have issues compiling it, you can disable it entirely by + // defining STBI_NO_SIMD. +@@ -384,6 +266,41 @@ + // says there's premultiplied data (currently only happens in iPhone images, + // and only if iPhone convert-to-rgb processing is on). + // ++// =========================================================================== ++// ++// ADDITIONAL CONFIGURATION ++// ++// - You can suppress implementation of any of the decoders to reduce ++// your code footprint by #defining one or more of the following ++// symbols before creating the implementation. ++// ++// STBI_NO_JPEG ++// STBI_NO_PNG ++// STBI_NO_BMP ++// STBI_NO_PSD ++// STBI_NO_TGA ++// STBI_NO_GIF ++// STBI_NO_HDR ++// STBI_NO_PIC ++// STBI_NO_PNM (.ppm and .pgm) ++// ++// - You can request *only* certain decoders and suppress all other ones ++// (this will be more forward-compatible, as addition of new decoders ++// doesn't require you to disable them explicitly): ++// ++// STBI_ONLY_JPEG ++// STBI_ONLY_PNG ++// STBI_ONLY_BMP ++// STBI_ONLY_PSD ++// STBI_ONLY_TGA ++// STBI_ONLY_GIF ++// STBI_ONLY_HDR ++// STBI_ONLY_PIC ++// STBI_ONLY_PNM (.ppm and .pgm) ++// ++// - If you use STBI_NO_PNG (or _ONLY_ without PNG), and you still ++// want the zlib decoder to be available, #define STBI_SUPPORT_ZLIB ++// + + + #ifndef STBI_NO_STDIO +@@ -394,7 +311,7 @@ + + enum + { +- STBI_default = 0, // only used for req_comp ++ STBI_default = 0, // only used for desired_channels + + STBI_grey = 1, + STBI_grey_alpha = 2, +@@ -403,6 +320,7 @@ enum + }; + + typedef unsigned char stbi_uc; ++typedef unsigned short stbi_us; + + #ifdef __cplusplus + extern "C" { +@@ -430,34 +348,60 @@ typedef struct + int (*eof) (void *user); // returns nonzero if we are at end of file/data + } stbi_io_callbacks; + +-STBIDEF stbi_uc *stbi_load (char const *filename, int *x, int *y, int *comp, int req_comp); +-STBIDEF stbi_uc *stbi_load_from_memory (stbi_uc const *buffer, int len , int *x, int *y, int *comp, int req_comp); +-STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk , void *user, int *x, int *y, int *comp, int req_comp); ++//////////////////////////////////// ++// ++// 8-bits-per-channel interface ++// ++ ++STBIDEF stbi_uc *stbi_load_from_memory (stbi_uc const *buffer, int len , int *x, int *y, int *channels_in_file, int desired_channels); ++STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk , void *user, int *x, int *y, int *channels_in_file, int desired_channels); ++#ifndef STBI_NO_GIF ++STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp); ++#endif ++ + + #ifndef STBI_NO_STDIO +-STBIDEF stbi_uc *stbi_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); ++STBIDEF stbi_uc *stbi_load (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels); ++STBIDEF stbi_uc *stbi_load_from_file (FILE *f, int *x, int *y, int *channels_in_file, int desired_channels); + // for stbi_load_from_file, file pointer is left pointing immediately after image + #endif + ++//////////////////////////////////// ++// ++// 16-bits-per-channel interface ++// ++ ++STBIDEF stbi_us *stbi_load_16_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels); ++STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels); ++ ++#ifndef STBI_NO_STDIO ++STBIDEF stbi_us *stbi_load_16 (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels); ++STBIDEF stbi_us *stbi_load_from_file_16(FILE *f, int *x, int *y, int *channels_in_file, int desired_channels); ++#endif ++ ++//////////////////////////////////// ++// ++// float-per-channel interface ++// + #ifndef STBI_NO_LINEAR +- STBIDEF float *stbi_loadf (char const *filename, int *x, int *y, int *comp, int req_comp); +- STBIDEF float *stbi_loadf_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); +- STBIDEF float *stbi_loadf_from_callbacks (stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp); ++ STBIDEF float *stbi_loadf_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels); ++ STBIDEF float *stbi_loadf_from_callbacks (stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels); + + #ifndef STBI_NO_STDIO +- STBIDEF float *stbi_loadf_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); ++ STBIDEF float *stbi_loadf (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels); ++ STBIDEF float *stbi_loadf_from_file (FILE *f, int *x, int *y, int *channels_in_file, int desired_channels); + #endif + #endif + + #ifndef STBI_NO_HDR + STBIDEF void stbi_hdr_to_ldr_gamma(float gamma); + STBIDEF void stbi_hdr_to_ldr_scale(float scale); +-#endif ++#endif // STBI_NO_HDR + + #ifndef STBI_NO_LINEAR + STBIDEF void stbi_ldr_to_hdr_gamma(float gamma); + STBIDEF void stbi_ldr_to_hdr_scale(float scale); +-#endif // STBI_NO_HDR ++#endif // STBI_NO_LINEAR + + // stbi_is_hdr is always defined, but always returns false if STBI_NO_HDR + STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user); +@@ -478,11 +422,14 @@ STBIDEF void stbi_image_free (void *retval_from_stbi_load); + // get image dimensions & components without fully decoding + STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp); + STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp); ++STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len); ++STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *clbk, void *user); + + #ifndef STBI_NO_STDIO +-STBIDEF int stbi_info (char const *filename, int *x, int *y, int *comp); +-STBIDEF int stbi_info_from_file (FILE *f, int *x, int *y, int *comp); +- ++STBIDEF int stbi_info (char const *filename, int *x, int *y, int *comp); ++STBIDEF int stbi_info_from_file (FILE *f, int *x, int *y, int *comp); ++STBIDEF int stbi_is_16_bit (char const *filename); ++STBIDEF int stbi_is_16_bit_from_file(FILE *f); + #endif + + +@@ -524,7 +471,7 @@ STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const ch + #if defined(STBI_ONLY_JPEG) || defined(STBI_ONLY_PNG) || defined(STBI_ONLY_BMP) \ + || defined(STBI_ONLY_TGA) || defined(STBI_ONLY_GIF) || defined(STBI_ONLY_PSD) \ + || defined(STBI_ONLY_HDR) || defined(STBI_ONLY_PIC) || defined(STBI_ONLY_PNM) \ +- || defined(STBI_ONLY_ZLIB) || defined(STBI_ONLY_ICO) ++ || defined(STBI_ONLY_ZLIB) + #ifndef STBI_ONLY_JPEG + #define STBI_NO_JPEG + #endif +@@ -552,9 +499,6 @@ STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const ch + #ifndef STBI_ONLY_PNM + #define STBI_NO_PNM + #endif +- #ifndef STBI_ONLY_ICO +- #define STBI_NO_ICO +- #endif + #endif + + #if defined(STBI_NO_PNG) && !defined(STBI_SUPPORT_ZLIB) && !defined(STBI_NO_ZLIB) +@@ -566,9 +510,10 @@ STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const ch + #include // ptrdiff_t on osx + #include + #include ++#include + + #if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) +-#include // ldexp ++#include // ldexp, pow + #endif + + #ifndef STBI_NO_STDIO +@@ -624,18 +569,22 @@ typedef unsigned char validate_uint32[sizeof(stbi__uint32)==4 ? 1 : -1]; + #define stbi_lrot(x,y) (((x) << (y)) | ((x) >> (32 - (y)))) + #endif + +-#if defined(STBI_MALLOC) && defined(STBI_FREE) && defined(STBI_REALLOC) ++#if defined(STBI_MALLOC) && defined(STBI_FREE) && (defined(STBI_REALLOC) || defined(STBI_REALLOC_SIZED)) + // ok +-#elif !defined(STBI_MALLOC) && !defined(STBI_FREE) && !defined(STBI_REALLOC) ++#elif !defined(STBI_MALLOC) && !defined(STBI_FREE) && !defined(STBI_REALLOC) && !defined(STBI_REALLOC_SIZED) + // ok + #else +-#error "Must define all or none of STBI_MALLOC, STBI_FREE, and STBI_REALLOC." ++#error "Must define all or none of STBI_MALLOC, STBI_FREE, and STBI_REALLOC (or STBI_REALLOC_SIZED)." + #endif + + #ifndef STBI_MALLOC +-#define STBI_MALLOC(sz) malloc(sz) +-#define STBI_REALLOC(p,sz) realloc(p,sz) +-#define STBI_FREE(p) free(p) ++#define STBI_MALLOC(sz) malloc(sz) ++#define STBI_REALLOC(p,newsz) realloc(p,newsz) ++#define STBI_FREE(p) free(p) ++#endif ++ ++#ifndef STBI_REALLOC_SIZED ++#define STBI_REALLOC_SIZED(p,oldsz,newsz) STBI_REALLOC(p,newsz) + #endif + + // x86/x64 detection +@@ -645,12 +594,14 @@ typedef unsigned char validate_uint32[sizeof(stbi__uint32)==4 ? 1 : -1]; + #define STBI__X86_TARGET + #endif + +-#if defined(__GNUC__) && (defined(STBI__X86_TARGET) || defined(STBI__X64_TARGET)) && !defined(__SSE2__) && !defined(STBI_NO_SIMD) +-// NOTE: not clear do we actually need this for the 64-bit path? ++#if defined(__GNUC__) && defined(STBI__X86_TARGET) && !defined(__SSE2__) && !defined(STBI_NO_SIMD) + // gcc doesn't support sse2 intrinsics unless you compile with -msse2, +-// (but compiling with -msse2 allows the compiler to use SSE2 everywhere; +-// this is just broken and gcc are jerks for not fixing it properly +-// http://www.virtualdub.org/blog/pivot/entry.php?id=363 ) ++// which in turn means it gets to use SSE2 everywhere. This is unfortunate, ++// but previous attempts to provide the SSE2 functions with runtime ++// detection caused numerous issues. The way architecture extensions are ++// exposed in GCC/Clang is, sadly, not really suited for one-file libs. ++// New behavior: if compiled with -msse2, we use SSE2 without any ++// detection; if not, we don't use it at all. + #define STBI_NO_SIMD + #endif + +@@ -669,7 +620,7 @@ typedef unsigned char validate_uint32[sizeof(stbi__uint32)==4 ? 1 : -1]; + #define STBI_NO_SIMD + #endif + +-#if !defined(STBI_NO_SIMD) && defined(STBI__X86_TARGET) ++#if !defined(STBI_NO_SIMD) && (defined(STBI__X86_TARGET) || defined(STBI__X64_TARGET)) + #define STBI_SSE2 + #include + +@@ -698,7 +649,7 @@ static int stbi__cpuid3(void) + + #define STBI_SIMD_ALIGN(type, name) __declspec(align(16)) type name + +-static int stbi__sse2_available() ++static int stbi__sse2_available(void) + { + int info3 = stbi__cpuid3(); + return ((info3 >> 26) & 1) != 0; +@@ -706,16 +657,12 @@ static int stbi__sse2_available() + #else // assume GCC-style if not VC++ + #define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16))) + +-static int stbi__sse2_available() ++static int stbi__sse2_available(void) + { +-#if defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) >= 408 // GCC 4.8 or later +- // GCC 4.8+ has a nice way to do this +- return __builtin_cpu_supports("sse2"); +-#else +- // portable way to do this, preferably without using GCC inline ASM? +- // just bail for now. +- return 0; +-#endif ++ // If we're even attempting to compile this on GCC/Clang, that means ++ // -msse2 is on, which means the compiler is allowed to use SSE2 ++ // instructions at will, and so are we. ++ return 1; + } + #endif + #endif +@@ -754,7 +701,7 @@ typedef struct + stbi_uc buffer_start[128]; + + stbi_uc *img_buffer, *img_buffer_end; +- stbi_uc *img_buffer_original; ++ stbi_uc *img_buffer_original, *img_buffer_original_end; + } stbi__context; + + +@@ -766,7 +713,7 @@ static void stbi__start_mem(stbi__context *s, stbi_uc const *buffer, int len) + s->io.read = NULL; + s->read_from_callbacks = 0; + s->img_buffer = s->img_buffer_original = (stbi_uc *) buffer; +- s->img_buffer_end = (stbi_uc *) buffer+len; ++ s->img_buffer_end = s->img_buffer_original_end = (stbi_uc *) buffer+len; + } + + // initialize a callback-based context +@@ -778,6 +725,7 @@ static void stbi__start_callbacks(stbi__context *s, stbi_io_callbacks *c, void * + s->read_from_callbacks = 1; + s->img_buffer_original = s->buffer_start; + stbi__refill_buffer(s); ++ s->img_buffer_original_end = s->img_buffer_end; + } + + #ifndef STBI_NO_STDIO +@@ -819,65 +767,76 @@ static void stbi__rewind(stbi__context *s) + // 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; ++ s->img_buffer_end = s->img_buffer_original_end; + } + ++enum ++{ ++ STBI_ORDER_RGB, ++ STBI_ORDER_BGR ++}; ++ ++typedef struct ++{ ++ int bits_per_channel; ++ int num_channels; ++ int channel_order; ++} stbi__result_info; ++ + #ifndef STBI_NO_JPEG + static int stbi__jpeg_test(stbi__context *s); +-static stbi_uc *stbi__jpeg_load(stbi__context *s, int *x, int *y, int *comp, int req_comp); ++static void *stbi__jpeg_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); + static int stbi__jpeg_info(stbi__context *s, int *x, int *y, int *comp); + #endif + + #ifndef STBI_NO_PNG + static int stbi__png_test(stbi__context *s); +-static stbi_uc *stbi__png_load(stbi__context *s, int *x, int *y, int *comp, int req_comp); ++static void *stbi__png_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); + static int stbi__png_info(stbi__context *s, int *x, int *y, int *comp); +-#endif +- +-#ifndef STBI_NO_ICO +-static int stbi__ico_test(stbi__context *s); +-static stbi_uc *stbi__ico_load(stbi__context *s, int *x, int *y, int *comp, int req_comp); +-static int stbi__ico_info(stbi__context *s, int *x, int *y, int *comp); ++static int stbi__png_is16(stbi__context *s); + #endif + + #ifndef STBI_NO_BMP + static int stbi__bmp_test(stbi__context *s); +-static stbi_uc *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp); ++static void *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); + static int stbi__bmp_info(stbi__context *s, int *x, int *y, int *comp); + #endif + + #ifndef STBI_NO_TGA + static int stbi__tga_test(stbi__context *s); +-static stbi_uc *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int req_comp); ++static void *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); + static int stbi__tga_info(stbi__context *s, int *x, int *y, int *comp); + #endif + + #ifndef STBI_NO_PSD + static int stbi__psd_test(stbi__context *s); +-static stbi_uc *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int req_comp); ++static void *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc); + static int stbi__psd_info(stbi__context *s, int *x, int *y, int *comp); ++static int stbi__psd_is16(stbi__context *s); + #endif + + #ifndef STBI_NO_HDR + static int stbi__hdr_test(stbi__context *s); +-static float *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int req_comp); ++static float *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); + static int stbi__hdr_info(stbi__context *s, int *x, int *y, int *comp); + #endif + + #ifndef STBI_NO_PIC + static int stbi__pic_test(stbi__context *s); +-static stbi_uc *stbi__pic_load(stbi__context *s, int *x, int *y, int *comp, int req_comp); ++static void *stbi__pic_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); + static int stbi__pic_info(stbi__context *s, int *x, int *y, int *comp); + #endif + + #ifndef STBI_NO_GIF + static int stbi__gif_test(stbi__context *s); +-static stbi_uc *stbi__gif_load(stbi__context *s, int *x, int *y, int *comp, int req_comp); ++static void *stbi__gif_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); ++static void *stbi__load_gif_main(stbi__context *s, int **delays, int *x, int *y, int *z, int *comp, int req_comp); + static int stbi__gif_info(stbi__context *s, int *x, int *y, int *comp); + #endif + + #ifndef STBI_NO_PNM + static int stbi__pnm_test(stbi__context *s); +-static stbi_uc *stbi__pnm_load(stbi__context *s, int *x, int *y, int *comp, int req_comp); ++static void *stbi__pnm_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); + static int stbi__pnm_info(stbi__context *s, int *x, int *y, int *comp); + #endif + +@@ -900,6 +859,81 @@ static void *stbi__malloc(size_t size) + return STBI_MALLOC(size); + } + ++// stb_image uses ints pervasively, including for offset calculations. ++// therefore the largest decoded image size we can support with the ++// current code, even on 64-bit targets, is INT_MAX. this is not a ++// significant limitation for the intended use case. ++// ++// we do, however, need to make sure our size calculations don't ++// overflow. hence a few helper functions for size calculations that ++// multiply integers together, making sure that they're non-negative ++// and no overflow occurs. ++ ++// return 1 if the sum is valid, 0 on overflow. ++// negative terms are considered invalid. ++static int stbi__addsizes_valid(int a, int b) ++{ ++ if (b < 0) return 0; ++ // now 0 <= b <= INT_MAX, hence also ++ // 0 <= INT_MAX - b <= INTMAX. ++ // And "a + b <= INT_MAX" (which might overflow) is the ++ // same as a <= INT_MAX - b (no overflow) ++ return a <= INT_MAX - b; ++} ++ ++// returns 1 if the product is valid, 0 on overflow. ++// negative factors are considered invalid. ++static int stbi__mul2sizes_valid(int a, int b) ++{ ++ if (a < 0 || b < 0) return 0; ++ if (b == 0) return 1; // mul-by-0 is always safe ++ // portable way to check for no overflows in a*b ++ return a <= INT_MAX/b; ++} ++ ++// returns 1 if "a*b + add" has no negative terms/factors and doesn't overflow ++static int stbi__mad2sizes_valid(int a, int b, int add) ++{ ++ return stbi__mul2sizes_valid(a, b) && stbi__addsizes_valid(a*b, add); ++} ++ ++// returns 1 if "a*b*c + add" has no negative terms/factors and doesn't overflow ++static int stbi__mad3sizes_valid(int a, int b, int c, int add) ++{ ++ return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a*b, c) && ++ stbi__addsizes_valid(a*b*c, add); ++} ++ ++// returns 1 if "a*b*c*d + add" has no negative terms/factors and doesn't overflow ++#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) ++static int stbi__mad4sizes_valid(int a, int b, int c, int d, int add) ++{ ++ return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a*b, c) && ++ stbi__mul2sizes_valid(a*b*c, d) && stbi__addsizes_valid(a*b*c*d, add); ++} ++#endif ++ ++// mallocs with size overflow checking ++static void *stbi__malloc_mad2(int a, int b, int add) ++{ ++ if (!stbi__mad2sizes_valid(a, b, add)) return NULL; ++ return stbi__malloc(a*b + add); ++} ++ ++static void *stbi__malloc_mad3(int a, int b, int c, int add) ++{ ++ if (!stbi__mad3sizes_valid(a, b, c, add)) return NULL; ++ return stbi__malloc(a*b*c + add); ++} ++ ++#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) ++static void *stbi__malloc_mad4(int a, int b, int c, int d, int add) ++{ ++ if (!stbi__mad4sizes_valid(a, b, c, d, add)) return NULL; ++ return stbi__malloc(a*b*c*d + add); ++} ++#endif ++ + // stbi__err - error + // stbi__errpf - error returning pointer to float + // stbi__errpuc - error returning pointer to unsigned char +@@ -912,8 +946,8 @@ static void *stbi__malloc(size_t size) + #define stbi__err(x,y) stbi__err(x) + #endif + +-#define stbi__errpf(x,y) ((float *) (stbi__err(x,y)?NULL:NULL)) +-#define stbi__errpuc(x,y) ((unsigned char *) (stbi__err(x,y)?NULL:NULL)) ++#define stbi__errpf(x,y) ((float *)(size_t) (stbi__err(x,y)?NULL:NULL)) ++#define stbi__errpuc(x,y) ((unsigned char *)(size_t) (stbi__err(x,y)?NULL:NULL)) + + STBIDEF void stbi_image_free(void *retval_from_stbi_load) + { +@@ -935,36 +969,38 @@ STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip) + stbi__vertically_flip_on_load = flag_true_if_should_flip; + } + +-static unsigned char *stbi__load_main(stbi__context *s, int *x, int *y, int *comp, int req_comp) ++static void *stbi__load_main(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc) + { ++ memset(ri, 0, sizeof(*ri)); // make sure it's initialized if we add new fields ++ ri->bits_per_channel = 8; // default is 8 so most paths don't have to be changed ++ ri->channel_order = STBI_ORDER_RGB; // all current input & output are this, but this is here so we can add BGR order ++ ri->num_channels = 0; ++ + #ifndef STBI_NO_JPEG +- if (stbi__jpeg_test(s)) return stbi__jpeg_load(s,x,y,comp,req_comp); ++ if (stbi__jpeg_test(s)) return stbi__jpeg_load(s,x,y,comp,req_comp, ri); + #endif + #ifndef STBI_NO_PNG +- if (stbi__png_test(s)) return stbi__png_load(s,x,y,comp,req_comp); ++ if (stbi__png_test(s)) return stbi__png_load(s,x,y,comp,req_comp, ri); + #endif + #ifndef STBI_NO_BMP +- if (stbi__bmp_test(s)) return stbi__bmp_load(s,x,y,comp,req_comp); ++ if (stbi__bmp_test(s)) return stbi__bmp_load(s,x,y,comp,req_comp, ri); + #endif + #ifndef STBI_NO_GIF +- if (stbi__gif_test(s)) return stbi__gif_load(s,x,y,comp,req_comp); ++ if (stbi__gif_test(s)) return stbi__gif_load(s,x,y,comp,req_comp, ri); + #endif + #ifndef STBI_NO_PSD +- if (stbi__psd_test(s)) return stbi__psd_load(s,x,y,comp,req_comp); ++ if (stbi__psd_test(s)) return stbi__psd_load(s,x,y,comp,req_comp, ri, bpc); + #endif + #ifndef STBI_NO_PIC +- if (stbi__pic_test(s)) return stbi__pic_load(s,x,y,comp,req_comp); ++ if (stbi__pic_test(s)) return stbi__pic_load(s,x,y,comp,req_comp, ri); + #endif + #ifndef STBI_NO_PNM +- if (stbi__pnm_test(s)) return stbi__pnm_load(s,x,y,comp,req_comp); +- #endif +- #ifndef STBI_NO_ICO +- if (stbi__ico_test(s)) return stbi__ico_load(s,x,y,comp,req_comp); ++ if (stbi__pnm_test(s)) return stbi__pnm_load(s,x,y,comp,req_comp, ri); + #endif + + #ifndef STBI_NO_HDR + if (stbi__hdr_test(s)) { +- float *hdr = stbi__hdr_load(s, x,y,comp,req_comp); ++ float *hdr = stbi__hdr_load(s, x,y,comp,req_comp, ri); + return stbi__hdr_to_ldr(hdr, *x, *y, req_comp ? req_comp : *comp); + } + #endif +@@ -972,58 +1008,138 @@ static unsigned char *stbi__load_main(stbi__context *s, int *x, int *y, int *com + #ifndef STBI_NO_TGA + // 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 stbi__tga_load(s,x,y,comp,req_comp, ri); + #endif + + return stbi__errpuc("unknown image type", "Image not of any known type, or corrupt"); + } + +-static unsigned char *stbi__load_flip(stbi__context *s, int *x, int *y, int *comp, int req_comp) ++static stbi_uc *stbi__convert_16_to_8(stbi__uint16 *orig, int w, int h, int channels) + { +- unsigned char *result = stbi__load_main(s, x, y, comp, req_comp); ++ int i; ++ int img_len = w * h * channels; ++ stbi_uc *reduced; + +- if (stbi__vertically_flip_on_load && result != NULL) { +- int w = *x, h = *y; +- int depth = req_comp ? req_comp : *comp; +- int row,col,z; +- stbi_uc temp; +- +- // @OPTIMIZE: use a bigger temp buffer and memcpy multiple pixels at once +- for (row = 0; row < (h>>1); row++) { +- for (col = 0; col < w; col++) { +- for (z = 0; z < depth; z++) { +- temp = result[(row * w + col) * depth + z]; +- result[(row * w + col) * depth + z] = result[((h - row - 1) * w + col) * depth + z]; +- result[((h - row - 1) * w + col) * depth + z] = temp; +- } +- } ++ reduced = (stbi_uc *) stbi__malloc(img_len); ++ if (reduced == NULL) return stbi__errpuc("outofmem", "Out of memory"); ++ ++ for (i = 0; i < img_len; ++i) ++ reduced[i] = (stbi_uc)((orig[i] >> 8) & 0xFF); // top half of each byte is sufficient approx of 16->8 bit scaling ++ ++ STBI_FREE(orig); ++ return reduced; ++} ++ ++static stbi__uint16 *stbi__convert_8_to_16(stbi_uc *orig, int w, int h, int channels) ++{ ++ int i; ++ int img_len = w * h * channels; ++ stbi__uint16 *enlarged; ++ ++ enlarged = (stbi__uint16 *) stbi__malloc(img_len*2); ++ if (enlarged == NULL) return (stbi__uint16 *) stbi__errpuc("outofmem", "Out of memory"); ++ ++ for (i = 0; i < img_len; ++i) ++ enlarged[i] = (stbi__uint16)((orig[i] << 8) + orig[i]); // replicate to high and low byte, maps 0->0, 255->0xffff ++ ++ STBI_FREE(orig); ++ return enlarged; ++} ++ ++static void stbi__vertical_flip(void *image, int w, int h, int bytes_per_pixel) ++{ ++ int row; ++ size_t bytes_per_row = (size_t)w * bytes_per_pixel; ++ stbi_uc temp[2048]; ++ stbi_uc *bytes = (stbi_uc *)image; ++ ++ for (row = 0; row < (h>>1); row++) { ++ stbi_uc *row0 = bytes + row*bytes_per_row; ++ stbi_uc *row1 = bytes + (h - row - 1)*bytes_per_row; ++ // swap row0 with row1 ++ size_t bytes_left = bytes_per_row; ++ while (bytes_left) { ++ size_t bytes_copy = (bytes_left < sizeof(temp)) ? bytes_left : sizeof(temp); ++ memcpy(temp, row0, bytes_copy); ++ memcpy(row0, row1, bytes_copy); ++ memcpy(row1, temp, bytes_copy); ++ row0 += bytes_copy; ++ row1 += bytes_copy; ++ bytes_left -= bytes_copy; + } + } ++} + +- return result; ++static void stbi__vertical_flip_slices(void *image, int w, int h, int z, int bytes_per_pixel) ++{ ++ int slice; ++ int slice_size = w * h * bytes_per_pixel; ++ ++ stbi_uc *bytes = (stbi_uc *)image; ++ for (slice = 0; slice < z; ++slice) { ++ stbi__vertical_flip(bytes, w, h, bytes_per_pixel); ++ bytes += slice_size; ++ } ++} ++ ++static unsigned char *stbi__load_and_postprocess_8bit(stbi__context *s, int *x, int *y, int *comp, int req_comp) ++{ ++ stbi__result_info ri; ++ void *result = stbi__load_main(s, x, y, comp, req_comp, &ri, 8); ++ ++ if (result == NULL) ++ return NULL; ++ ++ if (ri.bits_per_channel != 8) { ++ STBI_ASSERT(ri.bits_per_channel == 16); ++ result = stbi__convert_16_to_8((stbi__uint16 *) result, *x, *y, req_comp == 0 ? *comp : req_comp); ++ ri.bits_per_channel = 8; ++ } ++ ++ // @TODO: move stbi__convert_format to here ++ ++ if (stbi__vertically_flip_on_load) { ++ int channels = req_comp ? req_comp : *comp; ++ stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi_uc)); ++ } ++ ++ return (unsigned char *) result; ++} ++ ++static stbi__uint16 *stbi__load_and_postprocess_16bit(stbi__context *s, int *x, int *y, int *comp, int req_comp) ++{ ++ stbi__result_info ri; ++ void *result = stbi__load_main(s, x, y, comp, req_comp, &ri, 16); ++ ++ if (result == NULL) ++ return NULL; ++ ++ if (ri.bits_per_channel != 16) { ++ STBI_ASSERT(ri.bits_per_channel == 8); ++ result = stbi__convert_8_to_16((stbi_uc *) result, *x, *y, req_comp == 0 ? *comp : req_comp); ++ ri.bits_per_channel = 16; ++ } ++ ++ // @TODO: move stbi__convert_format16 to here ++ // @TODO: special case RGB-to-Y (and RGBA-to-YA) for 8-bit-to-16-bit case to keep more precision ++ ++ if (stbi__vertically_flip_on_load) { ++ int channels = req_comp ? req_comp : *comp; ++ stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi__uint16)); ++ } ++ ++ return (stbi__uint16 *) result; + } + ++#if !defined(STBI_NO_HDR) || !defined(STBI_NO_LINEAR) + static void stbi__float_postprocess(float *result, int *x, int *y, int *comp, int req_comp) + { + if (stbi__vertically_flip_on_load && result != NULL) { +- int w = *x, h = *y; +- int depth = req_comp ? req_comp : *comp; +- int row,col,z; +- float temp; +- +- // @OPTIMIZE: use a bigger temp buffer and memcpy multiple pixels at once +- for (row = 0; row < (h>>1); row++) { +- for (col = 0; col < w; col++) { +- for (z = 0; z < depth; z++) { +- temp = result[(row * w + col) * depth + z]; +- result[(row * w + col) * depth + z] = result[((h - row - 1) * w + col) * depth + z]; +- result[((h - row - 1) * w + col) * depth + z] = temp; +- } +- } +- } ++ int channels = req_comp ? req_comp : *comp; ++ stbi__vertical_flip(result, *x, *y, channels * sizeof(float)); + } + } +- ++#endif + + #ifndef STBI_NO_STDIO + +@@ -1055,28 +1171,83 @@ STBIDEF stbi_uc *stbi_load_from_file(FILE *f, int *x, int *y, int *comp, int req + unsigned char *result; + stbi__context s; + stbi__start_file(&s,f); +- result = stbi__load_flip(&s,x,y,comp,req_comp); ++ result = stbi__load_and_postprocess_8bit(&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; ++} ++ ++STBIDEF stbi__uint16 *stbi_load_from_file_16(FILE *f, int *x, int *y, int *comp, int req_comp) ++{ ++ stbi__uint16 *result; ++ stbi__context s; ++ stbi__start_file(&s,f); ++ result = stbi__load_and_postprocess_16bit(&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; + } ++ ++STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp) ++{ ++ FILE *f = stbi__fopen(filename, "rb"); ++ stbi__uint16 *result; ++ if (!f) return (stbi_us *) stbi__errpuc("can't fopen", "Unable to open file"); ++ result = stbi_load_from_file_16(f,x,y,comp,req_comp); ++ fclose(f); ++ return result; ++} ++ ++ + #endif //!STBI_NO_STDIO + ++STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels) ++{ ++ stbi__context s; ++ stbi__start_mem(&s,buffer,len); ++ return stbi__load_and_postprocess_16bit(&s,x,y,channels_in_file,desired_channels); ++} ++ ++STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels) ++{ ++ stbi__context s; ++ stbi__start_callbacks(&s, (stbi_io_callbacks *)clbk, user); ++ return stbi__load_and_postprocess_16bit(&s,x,y,channels_in_file,desired_channels); ++} ++ + STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) + { + stbi__context s; + stbi__start_mem(&s,buffer,len); +- return stbi__load_flip(&s,x,y,comp,req_comp); ++ return stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp); + } + + STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp) + { + stbi__context s; + stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user); +- return stbi__load_flip(&s,x,y,comp,req_comp); ++ return stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp); ++} ++ ++#ifndef STBI_NO_GIF ++STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp) ++{ ++ unsigned char *result; ++ stbi__context s; ++ stbi__start_mem(&s,buffer,len); ++ ++ result = (unsigned char*) stbi__load_gif_main(&s, delays, x, y, z, comp, req_comp); ++ if (stbi__vertically_flip_on_load) { ++ stbi__vertical_flip_slices( result, *x, *y, *z, *comp ); ++ } ++ ++ return result; + } ++#endif + + #ifndef STBI_NO_LINEAR + static float *stbi__loadf_main(stbi__context *s, int *x, int *y, int *comp, int req_comp) +@@ -1084,13 +1255,14 @@ static float *stbi__loadf_main(stbi__context *s, int *x, int *y, int *comp, int + unsigned char *data; + #ifndef STBI_NO_HDR + if (stbi__hdr_test(s)) { +- float *hdr_data = stbi__hdr_load(s,x,y,comp,req_comp); ++ stbi__result_info ri; ++ float *hdr_data = stbi__hdr_load(s,x,y,comp,req_comp, &ri); + if (hdr_data) + stbi__float_postprocess(hdr_data,x,y,comp,req_comp); + return hdr_data; + } + #endif +- data = stbi__load_flip(s, x, y, comp, req_comp); ++ data = stbi__load_and_postprocess_8bit(s, x, y, comp, req_comp); + if (data) + return stbi__ldr_to_hdr(data, *x, *y, req_comp ? req_comp : *comp); + return stbi__errpf("unknown image type", "Image not of any known type, or corrupt"); +@@ -1160,13 +1332,18 @@ STBIDEF int stbi_is_hdr (char const *filename) + return result; + } + +-STBIDEF int stbi_is_hdr_from_file(FILE *f) ++STBIDEF int stbi_is_hdr_from_file(FILE *f) + { + #ifndef STBI_NO_HDR ++ long pos = ftell(f); ++ int res; + stbi__context s; + stbi__start_file(&s,f); +- return stbi__hdr_test(&s); ++ res = stbi__hdr_test(&s); ++ fseek(f, pos, SEEK_SET); ++ return res; + #else ++ STBI_NOTUSED(f); + return 0; + #endif + } +@@ -1179,18 +1356,21 @@ STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void + stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user); + return stbi__hdr_test(&s); + #else ++ STBI_NOTUSED(clbk); ++ STBI_NOTUSED(user); + return 0; + #endif + } + +-static float stbi__h2l_gamma_i=1.0f/2.2f, stbi__h2l_scale_i=1.0f; ++#ifndef STBI_NO_LINEAR + static float stbi__l2h_gamma=2.2f, stbi__l2h_scale=1.0f; + +-#ifndef STBI_NO_LINEAR + STBIDEF void stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; } + STBIDEF void stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; } + #endif + ++static float stbi__h2l_gamma_i=1.0f/2.2f, stbi__h2l_scale_i=1.0f; ++ + STBIDEF void stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; } + STBIDEF void stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; } + +@@ -1299,17 +1479,23 @@ static stbi__uint32 stbi__get32be(stbi__context *s) + return (z << 16) + stbi__get16be(s); + } + ++#if defined(STBI_NO_BMP) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) ++// nothing ++#else + static int stbi__get16le(stbi__context *s) + { + int z = stbi__get8(s); + return z + (stbi__get8(s) << 8); + } ++#endif + ++#ifndef STBI_NO_BMP + static stbi__uint32 stbi__get32le(stbi__context *s) + { + stbi__uint32 z = stbi__get16le(s); + return z + (stbi__get16le(s) << 16); + } ++#endif + + #define STBI__BYTECAST(x) ((stbi_uc) ((x) & 255)) // truncate int to byte without warnings + +@@ -1338,7 +1524,7 @@ static unsigned char *stbi__convert_format(unsigned char *data, int img_n, int r + if (req_comp == img_n) return data; + STBI_ASSERT(req_comp >= 1 && req_comp <= 4); + +- good = (unsigned char *) stbi__malloc(req_comp * x * y); ++ good = (unsigned char *) stbi__malloc_mad3(req_comp, x, y, 0); + if (good == NULL) { + STBI_FREE(data); + return stbi__errpuc("outofmem", "Out of memory"); +@@ -1348,26 +1534,75 @@ static unsigned char *stbi__convert_format(unsigned char *data, int img_n, int r + 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) ++ #define STBI__COMBO(a,b) ((a)*8+(b)) ++ #define STBI__CASE(a,b) case STBI__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 (STBI__COMBO(img_n, req_comp)) { ++ STBI__CASE(1,2) { dest[0]=src[0], dest[1]=255; } break; ++ STBI__CASE(1,3) { dest[0]=dest[1]=dest[2]=src[0]; } break; ++ STBI__CASE(1,4) { dest[0]=dest[1]=dest[2]=src[0], dest[3]=255; } break; ++ STBI__CASE(2,1) { dest[0]=src[0]; } break; ++ STBI__CASE(2,3) { dest[0]=dest[1]=dest[2]=src[0]; } break; ++ STBI__CASE(2,4) { dest[0]=dest[1]=dest[2]=src[0], dest[3]=src[1]; } break; ++ STBI__CASE(3,4) { dest[0]=src[0],dest[1]=src[1],dest[2]=src[2],dest[3]=255; } break; ++ STBI__CASE(3,1) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); } break; ++ STBI__CASE(3,2) { dest[0]=stbi__compute_y(src[0],src[1],src[2]), dest[1] = 255; } break; ++ STBI__CASE(4,1) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); } break; ++ STBI__CASE(4,2) { dest[0]=stbi__compute_y(src[0],src[1],src[2]), dest[1] = src[3]; } break; ++ STBI__CASE(4,3) { dest[0]=src[0],dest[1]=src[1],dest[2]=src[2]; } break; ++ default: STBI_ASSERT(0); ++ } ++ #undef STBI__CASE ++ } ++ ++ STBI_FREE(data); ++ return good; ++} ++ ++static stbi__uint16 stbi__compute_y_16(int r, int g, int b) ++{ ++ return (stbi__uint16) (((r*77) + (g*150) + (29*b)) >> 8); ++} ++ ++static stbi__uint16 *stbi__convert_format16(stbi__uint16 *data, int img_n, int req_comp, unsigned int x, unsigned int y) ++{ ++ int i,j; ++ stbi__uint16 *good; ++ ++ if (req_comp == img_n) return data; ++ STBI_ASSERT(req_comp >= 1 && req_comp <= 4); ++ ++ good = (stbi__uint16 *) stbi__malloc(req_comp * x * y * 2); ++ if (good == NULL) { ++ STBI_FREE(data); ++ return (stbi__uint16 *) stbi__errpuc("outofmem", "Out of memory"); ++ } ++ ++ for (j=0; j < (int) y; ++j) { ++ stbi__uint16 *src = data + j * x * img_n ; ++ stbi__uint16 *dest = good + j * x * req_comp; ++ ++ #define STBI__COMBO(a,b) ((a)*8+(b)) ++ #define STBI__CASE(a,b) case STBI__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]=stbi__compute_y(src[0],src[1],src[2]); break; +- CASE(3,2) dest[0]=stbi__compute_y(src[0],src[1],src[2]), dest[1] = 255; break; +- CASE(4,1) dest[0]=stbi__compute_y(src[0],src[1],src[2]); break; +- CASE(4,2) dest[0]=stbi__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; ++ switch (STBI__COMBO(img_n, req_comp)) { ++ STBI__CASE(1,2) { dest[0]=src[0], dest[1]=0xffff; } break; ++ STBI__CASE(1,3) { dest[0]=dest[1]=dest[2]=src[0]; } break; ++ STBI__CASE(1,4) { dest[0]=dest[1]=dest[2]=src[0], dest[3]=0xffff; } break; ++ STBI__CASE(2,1) { dest[0]=src[0]; } break; ++ STBI__CASE(2,3) { dest[0]=dest[1]=dest[2]=src[0]; } break; ++ STBI__CASE(2,4) { dest[0]=dest[1]=dest[2]=src[0], dest[3]=src[1]; } break; ++ STBI__CASE(3,4) { dest[0]=src[0],dest[1]=src[1],dest[2]=src[2],dest[3]=0xffff; } break; ++ STBI__CASE(3,1) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); } break; ++ STBI__CASE(3,2) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]), dest[1] = 0xffff; } break; ++ STBI__CASE(4,1) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); } break; ++ STBI__CASE(4,2) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]), dest[1] = src[3]; } break; ++ STBI__CASE(4,3) { dest[0]=src[0],dest[1]=src[1],dest[2]=src[2]; } break; + default: STBI_ASSERT(0); + } +- #undef CASE ++ #undef STBI__CASE + } + + STBI_FREE(data); +@@ -1378,7 +1613,9 @@ static unsigned char *stbi__convert_format(unsigned char *data, int img_n, int r + static float *stbi__ldr_to_hdr(stbi_uc *data, int x, int y, int comp) + { + int i,k,n; +- float *output = (float *) stbi__malloc(x * y * comp * sizeof(float)); ++ float *output; ++ if (!data) return NULL; ++ output = (float *) stbi__malloc_mad4(x, y, comp, sizeof(float), 0); + if (output == NULL) { STBI_FREE(data); return stbi__errpf("outofmem", "Out of memory"); } + // compute number of non-alpha components + if (comp & 1) n = comp; else n = comp-1; +@@ -1398,7 +1635,9 @@ static float *stbi__ldr_to_hdr(stbi_uc *data, int x, int y, int comp) + static stbi_uc *stbi__hdr_to_ldr(float *data, int x, int y, int comp) + { + int i,k,n; +- stbi_uc *output = (stbi_uc *) stbi__malloc(x * y * comp); ++ stbi_uc *output; ++ if (!data) return NULL; ++ output = (stbi_uc *) stbi__malloc_mad3(x, y, comp, 0); + if (output == NULL) { STBI_FREE(data); return stbi__errpuc("outofmem", "Out of memory"); } + // compute number of non-alpha components + if (comp & 1) n = comp; else n = comp-1; +@@ -1463,7 +1702,7 @@ typedef struct + stbi__context *s; + stbi__huffman huff_dc[4]; + stbi__huffman huff_ac[4]; +- stbi_uc dequant[4][64]; ++ stbi__uint16 dequant[4][64]; + stbi__int16 fast_ac[4][1 << FAST_BITS]; + + // sizes for components, interleaved MCUs +@@ -1499,6 +1738,9 @@ typedef struct + int succ_high; + int succ_low; + int eob_run; ++ int jfif; ++ int app14_color_transform; // Adobe APP14 tag ++ int rgb; + + int scan_n, order[4]; + int restart_interval, todo; +@@ -1511,7 +1753,8 @@ typedef struct + + static int stbi__build_huffman(stbi__huffman *h, int *count) + { +- int i,j,k=0,code; ++ int i,j,k=0; ++ unsigned int code; + // build size list for each symbol (from JPEG spec) + for (i=0; i < 16; ++i) + for (j=0; j < count[i]; ++j) +@@ -1527,7 +1770,7 @@ static int stbi__build_huffman(stbi__huffman *h, int *count) + if (h->size[k] == j) { + while (h->size[k] == j) + h->code[k++] = (stbi__uint16) (code++); +- if (code-1 >= (1 << j)) return stbi__err("bad code lengths","Corrupt JPEG"); ++ if (code-1 >= (1u << j)) return stbi__err("bad code lengths","Corrupt JPEG"); + } + // compute largest code + 1 for this size, preshifted as needed later + h->maxcode[j] = code << (16-j); +@@ -1568,10 +1811,10 @@ static void stbi__build_fast_ac(stbi__int16 *fast_ac, stbi__huffman *h) + // magnitude code followed by receive_extend code + int k = ((i << len) & ((1 << FAST_BITS) - 1)) >> (FAST_BITS - magbits); + int m = 1 << (magbits - 1); +- if (k < m) k += (-1 << magbits) + 1; ++ if (k < m) k += (~0U << magbits) + 1; + // if the result is small enough, we can fit it in fast_ac table + if (k >= -128 && k <= 127) +- fast_ac[i] = (stbi__int16) ((k << 8) + (run << 4) + (len + magbits)); ++ fast_ac[i] = (stbi__int16) ((k * 256) + (run * 16) + (len + magbits)); + } + } + } +@@ -1580,9 +1823,10 @@ static void stbi__build_fast_ac(stbi__int16 *fast_ac, stbi__huffman *h) + static void stbi__grow_buffer_unsafe(stbi__jpeg *j) + { + do { +- int b = j->nomore ? 0 : stbi__get8(j->s); ++ unsigned int b = j->nomore ? 0 : stbi__get8(j->s); + if (b == 0xff) { + int c = stbi__get8(j->s); ++ while (c == 0xff) c = stbi__get8(j->s); // consume fill bytes + if (c != 0) { + j->marker = (unsigned char) c; + j->nomore = 1; +@@ -1595,7 +1839,7 @@ static void stbi__grow_buffer_unsafe(stbi__jpeg *j) + } + + // (1 << n) - 1 +-static stbi__uint32 stbi__bmask[17]={0,1,3,7,15,31,63,127,255,511,1023,2047,4095,8191,16383,32767,65535}; ++static const stbi__uint32 stbi__bmask[17]={0,1,3,7,15,31,63,127,255,511,1023,2047,4095,8191,16383,32767,65535}; + + // decode a jpeg huffman value from the bitstream + stbi_inline static int stbi__jpeg_huff_decode(stbi__jpeg *j, stbi__huffman *h) +@@ -1648,7 +1892,7 @@ stbi_inline static int stbi__jpeg_huff_decode(stbi__jpeg *j, stbi__huffman *h) + } + + // bias[n] = (-1<s); + if (x != 0xff) return STBI__MARKER_none; + while (x == 0xff) +- x = stbi__get8(j->s); ++ x = stbi__get8(j->s); // consume repeated 0xff fill bytes + return x; + } + +@@ -2431,7 +2675,7 @@ static void stbi__jpeg_reset(stbi__jpeg *j) + j->code_bits = 0; + j->code_buffer = 0; + j->nomore = 0; +- j->img_comp[0].dc_pred = j->img_comp[1].dc_pred = j->img_comp[2].dc_pred = 0; ++ j->img_comp[0].dc_pred = j->img_comp[1].dc_pred = j->img_comp[2].dc_pred = j->img_comp[3].dc_pred = 0; + j->marker = STBI__MARKER_none; + j->todo = j->restart_interval ? j->restart_interval : 0x7fffffff; + j->eob_run = 0; +@@ -2563,7 +2807,7 @@ static int stbi__parse_entropy_coded_data(stbi__jpeg *z) + } + } + +-static void stbi__jpeg_dequantize(short *data, stbi_uc *dequant) ++static void stbi__jpeg_dequantize(short *data, stbi__uint16 *dequant) + { + int i; + for (i=0; i < 64; ++i) +@@ -2605,13 +2849,14 @@ static int stbi__process_marker(stbi__jpeg *z, int m) + L = stbi__get16be(z->s)-2; + while (L > 0) { + int q = stbi__get8(z->s); +- int p = q >> 4; ++ int p = q >> 4, sixteen = (p != 0); + int t = q & 15,i; +- if (p != 0) return stbi__err("bad DQT type","Corrupt JPEG"); ++ if (p != 0 && p != 1) return stbi__err("bad DQT type","Corrupt JPEG"); + if (t > 3) return stbi__err("bad DQT table","Corrupt JPEG"); ++ + for (i=0; i < 64; ++i) +- z->dequant[t][stbi__jpeg_dezigzag[i]] = stbi__get8(z->s); +- L -= 65; ++ z->dequant[t][stbi__jpeg_dezigzag[i]] = (stbi__uint16)(sixteen ? stbi__get16be(z->s) : stbi__get8(z->s)); ++ L -= (sixteen ? 129 : 65); + } + return L==0; + +@@ -2644,12 +2889,50 @@ static int stbi__process_marker(stbi__jpeg *z, int m) + } + return L==0; + } ++ + // check for comment block or APP blocks + if ((m >= 0xE0 && m <= 0xEF) || m == 0xFE) { +- stbi__skip(z->s, stbi__get16be(z->s)-2); ++ L = stbi__get16be(z->s); ++ if (L < 2) { ++ if (m == 0xFE) ++ return stbi__err("bad COM len","Corrupt JPEG"); ++ else ++ return stbi__err("bad APP len","Corrupt JPEG"); ++ } ++ L -= 2; ++ ++ if (m == 0xE0 && L >= 5) { // JFIF APP0 segment ++ static const unsigned char tag[5] = {'J','F','I','F','\0'}; ++ int ok = 1; ++ int i; ++ for (i=0; i < 5; ++i) ++ if (stbi__get8(z->s) != tag[i]) ++ ok = 0; ++ L -= 5; ++ if (ok) ++ z->jfif = 1; ++ } else if (m == 0xEE && L >= 12) { // Adobe APP14 segment ++ static const unsigned char tag[6] = {'A','d','o','b','e','\0'}; ++ int ok = 1; ++ int i; ++ for (i=0; i < 6; ++i) ++ if (stbi__get8(z->s) != tag[i]) ++ ok = 0; ++ L -= 6; ++ if (ok) { ++ stbi__get8(z->s); // version ++ stbi__get16be(z->s); // flags0 ++ stbi__get16be(z->s); // flags1 ++ z->app14_color_transform = stbi__get8(z->s); // color transform ++ L -= 6; ++ } ++ } ++ ++ stbi__skip(z->s, L); + return 1; + } +- return 0; ++ ++ return stbi__err("unknown marker","Corrupt JPEG"); + } + + // after we see SOS +@@ -2692,6 +2975,28 @@ static int stbi__process_scan_header(stbi__jpeg *z) + return 1; + } + ++static int stbi__free_jpeg_components(stbi__jpeg *z, int ncomp, int why) ++{ ++ int i; ++ for (i=0; i < ncomp; ++i) { ++ if (z->img_comp[i].raw_data) { ++ STBI_FREE(z->img_comp[i].raw_data); ++ z->img_comp[i].raw_data = NULL; ++ z->img_comp[i].data = NULL; ++ } ++ if (z->img_comp[i].raw_coeff) { ++ STBI_FREE(z->img_comp[i].raw_coeff); ++ z->img_comp[i].raw_coeff = 0; ++ z->img_comp[i].coeff = 0; ++ } ++ if (z->img_comp[i].linebuf) { ++ STBI_FREE(z->img_comp[i].linebuf); ++ z->img_comp[i].linebuf = NULL; ++ } ++ } ++ return why; ++} ++ + static int stbi__process_frame_header(stbi__jpeg *z, int scan) + { + stbi__context *s = z->s; +@@ -2701,7 +3006,7 @@ static int stbi__process_frame_header(stbi__jpeg *z, int scan) + s->img_y = stbi__get16be(s); if (s->img_y == 0) return stbi__err("no header height", "JPEG format not supported: delayed height"); // Legal, but we don't handle it--but neither does IJG + s->img_x = stbi__get16be(s); if (s->img_x == 0) return stbi__err("0 width","Corrupt JPEG"); // JPEG requires + c = stbi__get8(s); +- if (c != 3 && c != 1) return stbi__err("bad component count","Corrupt JPEG"); // JFIF requires ++ if (c != 3 && c != 1 && c != 4) return stbi__err("bad component count","Corrupt JPEG"); + s->img_n = c; + for (i=0; i < c; ++i) { + z->img_comp[i].data = NULL; +@@ -2710,11 +3015,12 @@ static int stbi__process_frame_header(stbi__jpeg *z, int scan) + + if (Lf != 8+3*s->img_n) return stbi__err("bad SOF len","Corrupt JPEG"); + ++ z->rgb = 0; + for (i=0; i < s->img_n; ++i) { ++ static const unsigned char rgb[3] = { 'R', 'G', 'B' }; + z->img_comp[i].id = stbi__get8(s); +- if (z->img_comp[i].id != i+1) // JFIF requires +- if (z->img_comp[i].id != i) // some version of jpegtran outputs non-JFIF-compliant files! +- return stbi__err("bad component ID","Corrupt JPEG"); ++ if (s->img_n == 3 && z->img_comp[i].id == rgb[i]) ++ ++z->rgb; + q = stbi__get8(s); + z->img_comp[i].h = (q >> 4); if (!z->img_comp[i].h || z->img_comp[i].h > 4) return stbi__err("bad H","Corrupt JPEG"); + z->img_comp[i].v = q & 15; if (!z->img_comp[i].v || z->img_comp[i].v > 4) return stbi__err("bad V","Corrupt JPEG"); +@@ -2723,7 +3029,7 @@ static int stbi__process_frame_header(stbi__jpeg *z, int scan) + + if (scan != STBI__SCAN_load) return 1; + +- if ((1 << 30) / s->img_x / s->img_n < s->img_y) return stbi__err("too large", "Image too large to decode"); ++ if (!stbi__mad3sizes_valid(s->img_x, s->img_y, s->img_n, 0)) return stbi__err("too large", "Image too large to decode"); + + for (i=0; i < s->img_n; ++i) { + if (z->img_comp[i].h > h_max) h_max = z->img_comp[i].h; +@@ -2735,6 +3041,7 @@ static int stbi__process_frame_header(stbi__jpeg *z, int scan) + z->img_v_max = v_max; + z->img_mcu_w = h_max * 8; + z->img_mcu_h = v_max * 8; ++ // these sizes can't be more than 17 bits + z->img_mcu_x = (s->img_x + z->img_mcu_w-1) / z->img_mcu_w; + z->img_mcu_y = (s->img_y + z->img_mcu_h-1) / z->img_mcu_h; + +@@ -2746,28 +3053,27 @@ static int stbi__process_frame_header(stbi__jpeg *z, int scan) + // the bogus oversized data from using interleaved MCUs and their + // big blocks (e.g. a 16x16 iMCU on an image of width 33); we won't + // discard the extra data until colorspace conversion ++ // ++ // img_mcu_x, img_mcu_y: <=17 bits; comp[i].h and .v are <=4 (checked earlier) ++ // so these muls can't overflow with 32-bit ints (which we require) + z->img_comp[i].w2 = z->img_mcu_x * z->img_comp[i].h * 8; + z->img_comp[i].h2 = z->img_mcu_y * z->img_comp[i].v * 8; +- z->img_comp[i].raw_data = stbi__malloc(z->img_comp[i].w2 * z->img_comp[i].h2+15); +- +- if (z->img_comp[i].raw_data == NULL) { +- for(--i; i >= 0; --i) { +- STBI_FREE(z->img_comp[i].raw_data); +- z->img_comp[i].data = NULL; +- } +- return stbi__err("outofmem", "Out of memory"); +- } ++ z->img_comp[i].coeff = 0; ++ z->img_comp[i].raw_coeff = 0; ++ z->img_comp[i].linebuf = NULL; ++ z->img_comp[i].raw_data = stbi__malloc_mad2(z->img_comp[i].w2, z->img_comp[i].h2, 15); ++ if (z->img_comp[i].raw_data == NULL) ++ return stbi__free_jpeg_components(z, i+1, stbi__err("outofmem", "Out of memory")); + // align blocks for idct using mmx/sse + z->img_comp[i].data = (stbi_uc*) (((size_t) z->img_comp[i].raw_data + 15) & ~15); +- z->img_comp[i].linebuf = NULL; + if (z->progressive) { +- z->img_comp[i].coeff_w = (z->img_comp[i].w2 + 7) >> 3; +- z->img_comp[i].coeff_h = (z->img_comp[i].h2 + 7) >> 3; +- z->img_comp[i].raw_coeff = STBI_MALLOC(z->img_comp[i].coeff_w * z->img_comp[i].coeff_h * 64 * sizeof(short) + 15); ++ // w2, h2 are multiples of 8 (see above) ++ z->img_comp[i].coeff_w = z->img_comp[i].w2 / 8; ++ z->img_comp[i].coeff_h = z->img_comp[i].h2 / 8; ++ z->img_comp[i].raw_coeff = stbi__malloc_mad3(z->img_comp[i].w2, z->img_comp[i].h2, sizeof(short), 15); ++ if (z->img_comp[i].raw_coeff == NULL) ++ return stbi__free_jpeg_components(z, i+1, stbi__err("outofmem", "Out of memory")); + z->img_comp[i].coeff = (short*) (((size_t) z->img_comp[i].raw_coeff + 15) & ~15); +- } else { +- z->img_comp[i].coeff = 0; +- z->img_comp[i].raw_coeff = 0; + } + } + +@@ -2786,6 +3092,8 @@ static int stbi__process_frame_header(stbi__jpeg *z, int scan) + static int stbi__decode_jpeg_header(stbi__jpeg *z, int scan) + { + int m; ++ z->jfif = 0; ++ z->app14_color_transform = -1; // valid values are 0,1,2 + z->marker = STBI__MARKER_none; // initialize cached marker to empty + m = stbi__get_marker(z); + if (!stbi__SOI(m)) return stbi__err("no SOI","Corrupt JPEG"); +@@ -2827,12 +3135,15 @@ static int stbi__decode_jpeg_image(stbi__jpeg *j) + if (x == 255) { + j->marker = stbi__get8(j->s); + break; +- } else if (x != 0) { +- return stbi__err("junk before marker", "Corrupt JPEG"); + } + } + // if we reach eof without hitting a marker, stbi__get_marker() below will fail and we'll eventually return 0 + } ++ } else if (stbi__DNL(m)) { ++ int Ld = stbi__get16be(j->s); ++ stbi__uint32 NL = stbi__get16be(j->s); ++ if (Ld != 4) return stbi__err("bad DNL len", "Corrupt JPEG"); ++ if (NL != j->s->img_y) return stbi__err("bad DNL height", "Corrupt JPEG"); + } else { + if (!stbi__process_marker(j, m)) return 0; + } +@@ -3051,38 +3362,9 @@ static stbi_uc *stbi__resample_row_generic(stbi_uc *out, stbi_uc *in_near, stbi_ + return out; + } + +-#ifdef STBI_JPEG_OLD +-// this is the same YCbCr-to-RGB calculation that stb_image has used +-// historically before the algorithm changes in 1.49 +-#define float2fixed(x) ((int) ((x) * 65536 + 0.5)) +-static void stbi__YCbCr_to_RGB_row(stbi_uc *out, const stbi_uc *y, const stbi_uc *pcb, const stbi_uc *pcr, int count, int step) +-{ +- int i; +- for (i=0; i < count; ++i) { +- int y_fixed = (y[i] << 16) + 32768; // rounding +- int r,g,b; +- int cr = pcr[i] - 128; +- int cb = pcb[i] - 128; +- r = y_fixed + cr*float2fixed(1.40200f); +- g = y_fixed - cr*float2fixed(0.71414f) - cb*float2fixed(0.34414f); +- b = y_fixed + cb*float2fixed(1.77200f); +- r >>= 16; +- g >>= 16; +- b >>= 16; +- if ((unsigned) r > 255) { if (r < 0) r = 0; else r = 255; } +- if ((unsigned) g > 255) { if (g < 0) g = 0; else g = 255; } +- if ((unsigned) b > 255) { if (b < 0) b = 0; else b = 255; } +- out[0] = (stbi_uc)r; +- out[1] = (stbi_uc)g; +- out[2] = (stbi_uc)b; +- out[3] = 255; +- out += step; +- } +-} +-#else + // this is a reduced-precision calculation of YCbCr-to-RGB introduced + // to make sure the code produces the same results in both SIMD and scalar +-#define float2fixed(x) (((int) ((x) * 4096.0f + 0.5f)) << 8) ++#define stbi__float2fixed(x) (((int) ((x) * 4096.0f + 0.5f)) << 8) + static void stbi__YCbCr_to_RGB_row(stbi_uc *out, const stbi_uc *y, const stbi_uc *pcb, const stbi_uc *pcr, int count, int step) + { + int i; +@@ -3091,9 +3373,9 @@ static void stbi__YCbCr_to_RGB_row(stbi_uc *out, const stbi_uc *y, const stbi_uc + int r,g,b; + int cr = pcr[i] - 128; + int cb = pcb[i] - 128; +- r = y_fixed + cr* float2fixed(1.40200f); +- g = y_fixed + (cr*-float2fixed(0.71414f)) + ((cb*-float2fixed(0.34414f)) & 0xffff0000); +- b = y_fixed + cb* float2fixed(1.77200f); ++ r = y_fixed + cr* stbi__float2fixed(1.40200f); ++ g = y_fixed + (cr*-stbi__float2fixed(0.71414f)) + ((cb*-stbi__float2fixed(0.34414f)) & 0xffff0000); ++ b = y_fixed + cb* stbi__float2fixed(1.77200f); + r >>= 20; + g >>= 20; + b >>= 20; +@@ -3107,7 +3389,6 @@ static void stbi__YCbCr_to_RGB_row(stbi_uc *out, const stbi_uc *y, const stbi_uc + out += step; + } + } +-#endif + + #if defined(STBI_SSE2) || defined(STBI_NEON) + static void stbi__YCbCr_to_RGB_simd(stbi_uc *out, stbi_uc const *y, stbi_uc const *pcb, stbi_uc const *pcr, int count, int step) +@@ -3226,9 +3507,9 @@ static void stbi__YCbCr_to_RGB_simd(stbi_uc *out, stbi_uc const *y, stbi_uc cons + int r,g,b; + int cr = pcr[i] - 128; + int cb = pcb[i] - 128; +- r = y_fixed + cr* float2fixed(1.40200f); +- g = y_fixed + cr*-float2fixed(0.71414f) + ((cb*-float2fixed(0.34414f)) & 0xffff0000); +- b = y_fixed + cb* float2fixed(1.77200f); ++ r = y_fixed + cr* stbi__float2fixed(1.40200f); ++ g = y_fixed + cr*-stbi__float2fixed(0.71414f) + ((cb*-stbi__float2fixed(0.34414f)) & 0xffff0000); ++ b = y_fixed + cb* stbi__float2fixed(1.77200f); + r >>= 20; + g >>= 20; + b >>= 20; +@@ -3254,18 +3535,14 @@ static void stbi__setup_jpeg(stbi__jpeg *j) + #ifdef STBI_SSE2 + if (stbi__sse2_available()) { + j->idct_block_kernel = stbi__idct_simd; +- #ifndef STBI_JPEG_OLD + j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd; +- #endif + j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd; + } + #endif + + #ifdef STBI_NEON + j->idct_block_kernel = stbi__idct_simd; +- #ifndef STBI_JPEG_OLD + j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd; +- #endif + j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd; + #endif + } +@@ -3273,23 +3550,7 @@ static void stbi__setup_jpeg(stbi__jpeg *j) + // clean up the temporary component buffers + static void stbi__cleanup_jpeg(stbi__jpeg *j) + { +- int i; +- for (i=0; i < j->s->img_n; ++i) { +- if (j->img_comp[i].raw_data) { +- STBI_FREE(j->img_comp[i].raw_data); +- j->img_comp[i].raw_data = NULL; +- j->img_comp[i].data = NULL; +- } +- if (j->img_comp[i].raw_coeff) { +- STBI_FREE(j->img_comp[i].raw_coeff); +- j->img_comp[i].raw_coeff = 0; +- j->img_comp[i].coeff = 0; +- } +- if (j->img_comp[i].linebuf) { +- STBI_FREE(j->img_comp[i].linebuf); +- j->img_comp[i].linebuf = NULL; +- } +- } ++ stbi__free_jpeg_components(j, j->s->img_n, 0); + } + + typedef struct +@@ -3302,9 +3563,16 @@ typedef struct + int ypos; // which pre-expansion row we're on + } stbi__resample; + ++// fast 0..255 * 0..255 => 0..255 rounded multiplication ++static stbi_uc stbi__blinn_8x8(stbi_uc x, stbi_uc y) ++{ ++ unsigned int t = x*y + 128; ++ return (stbi_uc) ((t + (t >>8)) >> 8); ++} ++ + static stbi_uc *load_jpeg_image(stbi__jpeg *z, int *out_x, int *out_y, int *comp, int req_comp) + { +- int n, decode_n; ++ int n, decode_n, is_rgb; + z->s->img_n = 0; // make stbi__cleanup_jpeg safe + + // validate req_comp +@@ -3314,9 +3582,11 @@ static stbi_uc *load_jpeg_image(stbi__jpeg *z, int *out_x, int *out_y, int *comp + if (!stbi__decode_jpeg_image(z)) { stbi__cleanup_jpeg(z); return NULL; } + + // determine actual number of components to generate +- n = req_comp ? req_comp : z->s->img_n; ++ n = req_comp ? req_comp : z->s->img_n >= 3 ? 3 : 1; ++ ++ is_rgb = z->s->img_n == 3 && (z->rgb == 3 || (z->app14_color_transform == 0 && !z->jfif)); + +- if (z->s->img_n == 3 && n < 3) ++ if (z->s->img_n == 3 && n < 3 && !is_rgb) + decode_n = 1; + else + decode_n = z->s->img_n; +@@ -3353,7 +3623,7 @@ static stbi_uc *load_jpeg_image(stbi__jpeg *z, int *out_x, int *out_y, int *comp + } + + // can't error after this so, this is safe +- output = (stbi_uc *) stbi__malloc(n * z->s->img_x * z->s->img_y + 1); ++ output = (stbi_uc *) stbi__malloc_mad3(n, z->s->img_x, z->s->img_y, 1); + if (!output) { stbi__cleanup_jpeg(z); return stbi__errpuc("outofmem", "Out of memory"); } + + // now go ahead and resample +@@ -3376,7 +3646,39 @@ static stbi_uc *load_jpeg_image(stbi__jpeg *z, int *out_x, int *out_y, int *comp + if (n >= 3) { + stbi_uc *y = coutput[0]; + if (z->s->img_n == 3) { +- z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n); ++ if (is_rgb) { ++ for (i=0; i < z->s->img_x; ++i) { ++ out[0] = y[i]; ++ out[1] = coutput[1][i]; ++ out[2] = coutput[2][i]; ++ out[3] = 255; ++ out += n; ++ } ++ } else { ++ z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n); ++ } ++ } else if (z->s->img_n == 4) { ++ if (z->app14_color_transform == 0) { // CMYK ++ for (i=0; i < z->s->img_x; ++i) { ++ stbi_uc m = coutput[3][i]; ++ out[0] = stbi__blinn_8x8(coutput[0][i], m); ++ out[1] = stbi__blinn_8x8(coutput[1][i], m); ++ out[2] = stbi__blinn_8x8(coutput[2][i], m); ++ out[3] = 255; ++ out += n; ++ } ++ } else if (z->app14_color_transform == 2) { // YCCK ++ z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n); ++ for (i=0; i < z->s->img_x; ++i) { ++ stbi_uc m = coutput[3][i]; ++ out[0] = stbi__blinn_8x8(255 - out[0], m); ++ out[1] = stbi__blinn_8x8(255 - out[1], m); ++ out[2] = stbi__blinn_8x8(255 - out[2], m); ++ out += n; ++ } ++ } else { // YCbCr + alpha? Ignore the fourth channel for now ++ z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n); ++ } + } else + for (i=0; i < z->s->img_x; ++i) { + out[0] = out[1] = out[2] = y[i]; +@@ -3384,37 +3686,70 @@ static stbi_uc *load_jpeg_image(stbi__jpeg *z, int *out_x, int *out_y, int *comp + out += n; + } + } else { +- stbi_uc *y = coutput[0]; +- if (n == 1) +- for (i=0; i < z->s->img_x; ++i) out[i] = y[i]; +- else +- for (i=0; i < z->s->img_x; ++i) *out++ = y[i], *out++ = 255; ++ if (is_rgb) { ++ if (n == 1) ++ for (i=0; i < z->s->img_x; ++i) ++ *out++ = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]); ++ else { ++ for (i=0; i < z->s->img_x; ++i, out += 2) { ++ out[0] = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]); ++ out[1] = 255; ++ } ++ } ++ } else if (z->s->img_n == 4 && z->app14_color_transform == 0) { ++ for (i=0; i < z->s->img_x; ++i) { ++ stbi_uc m = coutput[3][i]; ++ stbi_uc r = stbi__blinn_8x8(coutput[0][i], m); ++ stbi_uc g = stbi__blinn_8x8(coutput[1][i], m); ++ stbi_uc b = stbi__blinn_8x8(coutput[2][i], m); ++ out[0] = stbi__compute_y(r, g, b); ++ out[1] = 255; ++ out += n; ++ } ++ } else if (z->s->img_n == 4 && z->app14_color_transform == 2) { ++ for (i=0; i < z->s->img_x; ++i) { ++ out[0] = stbi__blinn_8x8(255 - coutput[0][i], coutput[3][i]); ++ out[1] = 255; ++ out += n; ++ } ++ } else { ++ stbi_uc *y = coutput[0]; ++ if (n == 1) ++ for (i=0; i < z->s->img_x; ++i) out[i] = y[i]; ++ else ++ for (i=0; i < z->s->img_x; ++i) *out++ = y[i], *out++ = 255; ++ } + } + } + stbi__cleanup_jpeg(z); + *out_x = z->s->img_x; + *out_y = z->s->img_y; +- if (comp) *comp = z->s->img_n; // report original components, not output ++ if (comp) *comp = z->s->img_n >= 3 ? 3 : 1; // report original components, not output + return output; + } + } + +-static unsigned char *stbi__jpeg_load(stbi__context *s, int *x, int *y, int *comp, int req_comp) ++static void *stbi__jpeg_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) + { +- stbi__jpeg j; +- j.s = s; +- stbi__setup_jpeg(&j); +- return load_jpeg_image(&j, x,y,comp,req_comp); ++ unsigned char* result; ++ stbi__jpeg* j = (stbi__jpeg*) stbi__malloc(sizeof(stbi__jpeg)); ++ STBI_NOTUSED(ri); ++ j->s = s; ++ stbi__setup_jpeg(j); ++ result = load_jpeg_image(j, x,y,comp,req_comp); ++ STBI_FREE(j); ++ return result; + } + + static int stbi__jpeg_test(stbi__context *s) + { + int r; +- stbi__jpeg j; +- j.s = s; +- stbi__setup_jpeg(&j); +- r = stbi__decode_jpeg_header(&j, STBI__SCAN_type); ++ stbi__jpeg* j = (stbi__jpeg*)stbi__malloc(sizeof(stbi__jpeg)); ++ j->s = s; ++ stbi__setup_jpeg(j); ++ r = stbi__decode_jpeg_header(j, STBI__SCAN_type); + stbi__rewind(s); ++ STBI_FREE(j); + return r; + } + +@@ -3426,15 +3761,18 @@ static int stbi__jpeg_info_raw(stbi__jpeg *j, int *x, int *y, int *comp) + } + if (x) *x = j->s->img_x; + if (y) *y = j->s->img_y; +- if (comp) *comp = j->s->img_n; ++ if (comp) *comp = j->s->img_n >= 3 ? 3 : 1; + return 1; + } + + static int stbi__jpeg_info(stbi__context *s, int *x, int *y, int *comp) + { +- stbi__jpeg j; +- j.s = s; +- return stbi__jpeg_info_raw(&j, x, y, comp); ++ int result; ++ stbi__jpeg* j = (stbi__jpeg*) (stbi__malloc(sizeof(stbi__jpeg))); ++ j->s = s; ++ result = stbi__jpeg_info_raw(j, x, y, comp); ++ STBI_FREE(j); ++ return result; + } + #endif + +@@ -3480,7 +3818,7 @@ stbi_inline static int stbi__bit_reverse(int v, int bits) + return stbi__bitreverse16(v) >> (16-bits); + } + +-static int stbi__zbuild_huffman(stbi__zhuffman *z, stbi_uc *sizelist, int num) ++static int stbi__zbuild_huffman(stbi__zhuffman *z, const stbi_uc *sizelist, int num) + { + int i,k=0; + int code, next_code[16], sizes[17]; +@@ -3515,10 +3853,10 @@ static int stbi__zbuild_huffman(stbi__zhuffman *z, stbi_uc *sizelist, int num) + z->size [c] = (stbi_uc ) s; + z->value[c] = (stbi__uint16) i; + if (s <= STBI__ZFAST_BITS) { +- int k = stbi__bit_reverse(next_code[s],s); +- while (k < (1 << STBI__ZFAST_BITS)) { +- z->fast[k] = fastv; +- k += (1 << s); ++ int j = stbi__bit_reverse(next_code[s],s); ++ while (j < (1 << STBI__ZFAST_BITS)) { ++ z->fast[j] = fastv; ++ j += (1 << s); + } + } + ++next_code[s]; +@@ -3557,7 +3895,7 @@ static void stbi__fill_bits(stbi__zbuf *z) + { + do { + STBI_ASSERT(z->code_buffer < (1U << z->num_bits)); +- z->code_buffer |= stbi__zget8(z) << z->num_bits; ++ z->code_buffer |= (unsigned int) stbi__zget8(z) << z->num_bits; + z->num_bits += 8; + } while (z->num_bits <= 24); + } +@@ -3607,14 +3945,15 @@ stbi_inline static int stbi__zhuffman_decode(stbi__zbuf *a, stbi__zhuffman *z) + static int stbi__zexpand(stbi__zbuf *z, char *zout, int n) // need to make room for n bytes + { + char *q; +- int cur, limit; ++ int cur, limit, old_limit; + z->zout = zout; + if (!z->z_expandable) return stbi__err("output buffer limit","Corrupt PNG"); + cur = (int) (z->zout - z->zout_start); +- limit = (int) (z->zout_end - z->zout_start); ++ limit = old_limit = (int) (z->zout_end - z->zout_start); + while (cur + n > limit) + limit *= 2; +- q = (char *) STBI_REALLOC(z->zout_start, limit); ++ q = (char *) STBI_REALLOC_SIZED(z->zout_start, old_limit, limit); ++ STBI_NOTUSED(old_limit); + if (q == NULL) return stbi__err("outofmem", "Out of memory"); + z->zout_start = q; + z->zout = q + cur; +@@ -3622,18 +3961,18 @@ static int stbi__zexpand(stbi__zbuf *z, char *zout, int n) // need to make room + return 1; + } + +-static int stbi__zlength_base[31] = { ++static const int stbi__zlength_base[31] = { + 3,4,5,6,7,8,9,10,11,13, + 15,17,19,23,27,31,35,43,51,59, + 67,83,99,115,131,163,195,227,258,0,0 }; + +-static int stbi__zlength_extra[31]= ++static const int stbi__zlength_extra[31]= + { 0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0,0,0 }; + +-static int stbi__zdist_base[32] = { 1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193, ++static const int stbi__zdist_base[32] = { 1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193, + 257,385,513,769,1025,1537,2049,3073,4097,6145,8193,12289,16385,24577,0,0}; + +-static int stbi__zdist_extra[32] = ++static const int stbi__zdist_extra[32] = + { 0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13}; + + static int stbi__parse_huffman_block(stbi__zbuf *a) +@@ -3680,7 +4019,7 @@ static int stbi__parse_huffman_block(stbi__zbuf *a) + + static int stbi__compute_huffman_codes(stbi__zbuf *a) + { +- static stbi_uc length_dezigzag[19] = { 16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15 }; ++ static const stbi_uc length_dezigzag[19] = { 16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15 }; + stbi__zhuffman z_codelength; + stbi_uc lencodes[286+32+137];//padding for maximum single op + stbi_uc codelength_sizes[19]; +@@ -3689,6 +4028,7 @@ static int stbi__compute_huffman_codes(stbi__zbuf *a) + int hlit = stbi__zreceive(a,5) + 257; + int hdist = stbi__zreceive(a,5) + 1; + int hclen = stbi__zreceive(a,4) + 4; ++ int ntot = hlit + hdist; + + memset(codelength_sizes, 0, sizeof(codelength_sizes)); + for (i=0; i < hclen; ++i) { +@@ -3698,33 +4038,35 @@ static int stbi__compute_huffman_codes(stbi__zbuf *a) + if (!stbi__zbuild_huffman(&z_codelength, codelength_sizes, 19)) return 0; + + n = 0; +- while (n < hlit + hdist) { ++ while (n < ntot) { + int c = stbi__zhuffman_decode(a, &z_codelength); + if (c < 0 || c >= 19) return stbi__err("bad codelengths", "Corrupt PNG"); + if (c < 16) + lencodes[n++] = (stbi_uc) c; +- else if (c == 16) { +- c = stbi__zreceive(a,2)+3; +- memset(lencodes+n, lencodes[n-1], c); +- n += c; +- } else if (c == 17) { +- c = stbi__zreceive(a,3)+3; +- memset(lencodes+n, 0, c); +- n += c; +- } else { +- STBI_ASSERT(c == 18); +- c = stbi__zreceive(a,7)+11; +- memset(lencodes+n, 0, c); ++ else { ++ stbi_uc fill = 0; ++ if (c == 16) { ++ c = stbi__zreceive(a,2)+3; ++ if (n == 0) return stbi__err("bad codelengths", "Corrupt PNG"); ++ fill = lencodes[n-1]; ++ } else if (c == 17) ++ c = stbi__zreceive(a,3)+3; ++ else { ++ STBI_ASSERT(c == 18); ++ c = stbi__zreceive(a,7)+11; ++ } ++ if (ntot - n < c) return stbi__err("bad codelengths", "Corrupt PNG"); ++ memset(lencodes+n, fill, c); + n += c; + } + } +- if (n != hlit+hdist) return stbi__err("bad codelengths","Corrupt PNG"); ++ if (n != ntot) return stbi__err("bad codelengths","Corrupt PNG"); + if (!stbi__zbuild_huffman(&a->z_length, lencodes, hlit)) return 0; + if (!stbi__zbuild_huffman(&a->z_distance, lencodes+hlit, hdist)) return 0; + return 1; + } + +-static int stbi__parse_uncomperssed_block(stbi__zbuf *a) ++static int stbi__parse_uncompressed_block(stbi__zbuf *a) + { + stbi_uc header[4]; + int len,nlen,k; +@@ -3766,9 +4108,24 @@ static int stbi__parse_zlib_header(stbi__zbuf *a) + return 1; + } + +-// @TODO: should statically initialize these for optimal thread safety +-static stbi_uc stbi__zdefault_length[288], stbi__zdefault_distance[32]; +-static void stbi__init_zdefaults(void) ++static const stbi_uc stbi__zdefault_length[288] = ++{ ++ 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, ++ 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, ++ 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, ++ 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, ++ 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, ++ 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, ++ 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, ++ 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, ++ 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, 7,7,7,7,7,7,7,7,8,8,8,8,8,8,8,8 ++}; ++static const stbi_uc stbi__zdefault_distance[32] = ++{ ++ 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5 ++}; ++/* ++Init algorithm: + { + int i; // use <= to match clearly with spec + for (i=0; i <= 143; ++i) stbi__zdefault_length[i] = 8; +@@ -3778,6 +4135,7 @@ static void stbi__init_zdefaults(void) + + for (i=0; i <= 31; ++i) stbi__zdefault_distance[i] = 5; + } ++*/ + + static int stbi__parse_zlib(stbi__zbuf *a, int parse_header) + { +@@ -3790,13 +4148,12 @@ static int stbi__parse_zlib(stbi__zbuf *a, int parse_header) + final = stbi__zreceive(a,1); + type = stbi__zreceive(a,2); + if (type == 0) { +- if (!stbi__parse_uncomperssed_block(a)) return 0; ++ if (!stbi__parse_uncompressed_block(a)) return 0; + } else if (type == 3) { + return 0; + } else { + if (type == 1) { + // use fixed code lengths +- if (!stbi__zdefault_distance[31]) stbi__init_zdefaults(); + if (!stbi__zbuild_huffman(&a->z_length , stbi__zdefault_length , 288)) return 0; + if (!stbi__zbuild_huffman(&a->z_distance, stbi__zdefault_distance, 32)) return 0; + } else { +@@ -3921,7 +4278,7 @@ static stbi__pngchunk stbi__get_chunk_header(stbi__context *s) + + static int stbi__check_png_header(stbi__context *s) + { +- static stbi_uc png_sig[8] = { 137,80,78,71,13,10,26,10 }; ++ static const stbi_uc png_sig[8] = { 137,80,78,71,13,10,26,10 }; + int i; + for (i=0; i < 8; ++i) + if (stbi__get8(s) != png_sig[i]) return stbi__err("bad png sig","Not a PNG"); +@@ -3932,6 +4289,7 @@ typedef struct + { + stbi__context *s; + stbi_uc *idata, *expanded, *out; ++ int depth; + } stbi__png; + + +@@ -3966,35 +4324,40 @@ static int stbi__paeth(int a, int b, int c) + return c; + } + +-static stbi_uc stbi__depth_scale_table[9] = { 0, 0xff, 0x55, 0, 0x11, 0,0,0, 0x01 }; ++static const stbi_uc stbi__depth_scale_table[9] = { 0, 0xff, 0x55, 0, 0x11, 0,0,0, 0x01 }; + + // create the png data from post-deflated data + static int stbi__create_png_image_raw(stbi__png *a, stbi_uc *raw, stbi__uint32 raw_len, int out_n, stbi__uint32 x, stbi__uint32 y, int depth, int color) + { ++ int bytes = (depth == 16? 2 : 1); + stbi__context *s = a->s; +- stbi__uint32 i,j,stride = x*out_n; ++ stbi__uint32 i,j,stride = x*out_n*bytes; + stbi__uint32 img_len, img_width_bytes; + int k; + int img_n = s->img_n; // copy it into a local for later + ++ int output_bytes = out_n*bytes; ++ int filter_bytes = img_n*bytes; ++ int width = x; ++ + STBI_ASSERT(out_n == s->img_n || out_n == s->img_n+1); +- a->out = (stbi_uc *) stbi__malloc(x * y * out_n); // extra bytes to write off the end into ++ a->out = (stbi_uc *) stbi__malloc_mad3(x, y, output_bytes, 0); // extra bytes to write off the end into + if (!a->out) return stbi__err("outofmem", "Out of memory"); + ++ if (!stbi__mad3sizes_valid(img_n, x, depth, 7)) return stbi__err("too large", "Corrupt PNG"); + img_width_bytes = (((img_n * x * depth) + 7) >> 3); + img_len = (img_width_bytes + 1) * y; +- if (s->img_x == x && s->img_y == y) { +- if (raw_len != img_len) return stbi__err("not enough pixels","Corrupt PNG"); +- } else { // interlaced: +- if (raw_len < img_len) return stbi__err("not enough pixels","Corrupt PNG"); +- } ++ ++ // we used to check for exact match between raw_len and img_len on non-interlaced PNGs, ++ // but issue #276 reported a PNG in the wild that had extra data at the end (all zeros), ++ // so just check for raw_len < img_len always. ++ if (raw_len < img_len) return stbi__err("not enough pixels","Corrupt PNG"); + + for (j=0; j < y; ++j) { + stbi_uc *cur = a->out + stride*j; +- stbi_uc *prior = cur - stride; ++ stbi_uc *prior; + int filter = *raw++; +- int filter_bytes = img_n; +- int width = x; ++ + if (filter > 4) + return stbi__err("invalid filter","Corrupt PNG"); + +@@ -4004,6 +4367,7 @@ static int stbi__create_png_image_raw(stbi__png *a, stbi_uc *raw, stbi__uint32 r + filter_bytes = 1; + width = img_width_bytes; + } ++ prior = cur - stride; // bugfix: need to compute this after 'cur +=' computation above + + // if first row, use special filter that doesn't sample previous row + if (j == 0) filter = first_row_filter[filter]; +@@ -4027,6 +4391,14 @@ static int stbi__create_png_image_raw(stbi__png *a, stbi_uc *raw, stbi__uint32 r + raw += img_n; + cur += out_n; + prior += out_n; ++ } else if (depth == 16) { ++ if (img_n != out_n) { ++ cur[filter_bytes] = 255; // first pixel top byte ++ cur[filter_bytes+1] = 255; // first pixel bottom byte ++ } ++ raw += filter_bytes; ++ cur += output_bytes; ++ prior += output_bytes; + } else { + raw += 1; + cur += 1; +@@ -4035,38 +4407,47 @@ static int stbi__create_png_image_raw(stbi__png *a, stbi_uc *raw, stbi__uint32 r + + // this is a little gross, so that we don't switch per-pixel or per-component + if (depth < 8 || img_n == out_n) { +- int nk = (width - 1)*img_n; +- #define CASE(f) \ ++ int nk = (width - 1)*filter_bytes; ++ #define STBI__CASE(f) \ + case f: \ + for (k=0; k < nk; ++k) + switch (filter) { + // "none" filter turns into a memcpy here; make that explicit. + case STBI__F_none: memcpy(cur, raw, nk); break; +- CASE(STBI__F_sub) cur[k] = STBI__BYTECAST(raw[k] + cur[k-filter_bytes]); break; +- CASE(STBI__F_up) cur[k] = STBI__BYTECAST(raw[k] + prior[k]); break; +- CASE(STBI__F_avg) cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k-filter_bytes])>>1)); break; +- CASE(STBI__F_paeth) cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-filter_bytes],prior[k],prior[k-filter_bytes])); break; +- CASE(STBI__F_avg_first) cur[k] = STBI__BYTECAST(raw[k] + (cur[k-filter_bytes] >> 1)); break; +- CASE(STBI__F_paeth_first) cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-filter_bytes],0,0)); break; ++ STBI__CASE(STBI__F_sub) { cur[k] = STBI__BYTECAST(raw[k] + cur[k-filter_bytes]); } break; ++ STBI__CASE(STBI__F_up) { cur[k] = STBI__BYTECAST(raw[k] + prior[k]); } break; ++ STBI__CASE(STBI__F_avg) { cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k-filter_bytes])>>1)); } break; ++ STBI__CASE(STBI__F_paeth) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-filter_bytes],prior[k],prior[k-filter_bytes])); } break; ++ STBI__CASE(STBI__F_avg_first) { cur[k] = STBI__BYTECAST(raw[k] + (cur[k-filter_bytes] >> 1)); } break; ++ STBI__CASE(STBI__F_paeth_first) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-filter_bytes],0,0)); } break; + } +- #undef CASE ++ #undef STBI__CASE + raw += nk; + } else { + STBI_ASSERT(img_n+1 == out_n); +- #define CASE(f) \ ++ #define STBI__CASE(f) \ + case f: \ +- for (i=x-1; i >= 1; --i, cur[img_n]=255,raw+=img_n,cur+=out_n,prior+=out_n) \ +- for (k=0; k < img_n; ++k) ++ for (i=x-1; i >= 1; --i, cur[filter_bytes]=255,raw+=filter_bytes,cur+=output_bytes,prior+=output_bytes) \ ++ for (k=0; k < filter_bytes; ++k) + switch (filter) { +- CASE(STBI__F_none) cur[k] = raw[k]; break; +- CASE(STBI__F_sub) cur[k] = STBI__BYTECAST(raw[k] + cur[k-out_n]); break; +- CASE(STBI__F_up) cur[k] = STBI__BYTECAST(raw[k] + prior[k]); break; +- CASE(STBI__F_avg) cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k-out_n])>>1)); break; +- CASE(STBI__F_paeth) cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-out_n],prior[k],prior[k-out_n])); break; +- CASE(STBI__F_avg_first) cur[k] = STBI__BYTECAST(raw[k] + (cur[k-out_n] >> 1)); break; +- CASE(STBI__F_paeth_first) cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-out_n],0,0)); break; ++ STBI__CASE(STBI__F_none) { cur[k] = raw[k]; } break; ++ STBI__CASE(STBI__F_sub) { cur[k] = STBI__BYTECAST(raw[k] + cur[k- output_bytes]); } break; ++ STBI__CASE(STBI__F_up) { cur[k] = STBI__BYTECAST(raw[k] + prior[k]); } break; ++ STBI__CASE(STBI__F_avg) { cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k- output_bytes])>>1)); } break; ++ STBI__CASE(STBI__F_paeth) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k- output_bytes],prior[k],prior[k- output_bytes])); } break; ++ STBI__CASE(STBI__F_avg_first) { cur[k] = STBI__BYTECAST(raw[k] + (cur[k- output_bytes] >> 1)); } break; ++ STBI__CASE(STBI__F_paeth_first) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k- output_bytes],0,0)); } break; ++ } ++ #undef STBI__CASE ++ ++ // the loop above sets the high byte of the pixels' alpha, but for ++ // 16 bit png files we also need the low byte set. we'll do that here. ++ if (depth == 16) { ++ cur = a->out + stride*j; // start at the beginning of the row again ++ for (i=0; i < x; ++i,cur+=output_bytes) { ++ cur[filter_bytes+1] = 255; ++ } + } +- #undef CASE + } + } + +@@ -4123,25 +4504,36 @@ static int stbi__create_png_image_raw(stbi__png *a, stbi_uc *raw, stbi__uint32 r + if (k > 6) *cur++ = scale * ((*in >> 1) & 0x01); + } + if (img_n != out_n) { ++ int q; + // insert alpha = 255 +- stbi_uc *cur = a->out + stride*j; +- int i; ++ cur = a->out + stride*j; + if (img_n == 1) { +- for (i=x-1; i >= 0; --i) { +- cur[i*2+1] = 255; +- cur[i*2+0] = cur[i]; ++ for (q=x-1; q >= 0; --q) { ++ cur[q*2+1] = 255; ++ cur[q*2+0] = cur[q]; + } + } else { + STBI_ASSERT(img_n == 3); +- for (i=x-1; i >= 0; --i) { +- cur[i*4+3] = 255; +- cur[i*4+2] = cur[i*3+2]; +- cur[i*4+1] = cur[i*3+1]; +- cur[i*4+0] = cur[i*3+0]; ++ for (q=x-1; q >= 0; --q) { ++ cur[q*4+3] = 255; ++ cur[q*4+2] = cur[q*3+2]; ++ cur[q*4+1] = cur[q*3+1]; ++ cur[q*4+0] = cur[q*3+0]; + } + } + } + } ++ } else if (depth == 16) { ++ // force the image data from big-endian to platform-native. ++ // this is done in a separate pass due to the decoding relying ++ // on the data being untouched, but could probably be done ++ // per-line during decode if care is taken. ++ stbi_uc *cur = a->out; ++ stbi__uint16 *cur16 = (stbi__uint16*)cur; ++ ++ for(i=0; i < x*y*out_n; ++i,cur16++,cur+=2) { ++ *cur16 = (cur[0] << 8) | cur[1]; ++ } + } + + return 1; +@@ -4149,13 +4541,15 @@ static int stbi__create_png_image_raw(stbi__png *a, stbi_uc *raw, stbi__uint32 r + + static int stbi__create_png_image(stbi__png *a, stbi_uc *image_data, stbi__uint32 image_data_len, int out_n, int depth, int color, int interlaced) + { ++ int bytes = (depth == 16 ? 2 : 1); ++ int out_bytes = out_n * bytes; + stbi_uc *final; + int p; + if (!interlaced) + return stbi__create_png_image_raw(a, image_data, image_data_len, out_n, a->s->img_x, a->s->img_y, depth, color); + + // de-interlacing +- final = (stbi_uc *) stbi__malloc(a->s->img_x * a->s->img_y * out_n); ++ final = (stbi_uc *) stbi__malloc_mad3(a->s->img_x, a->s->img_y, out_bytes, 0); + for (p=0; p < 7; ++p) { + int xorig[] = { 0,4,0,2,0,1,0 }; + int yorig[] = { 0,0,4,0,2,0,1 }; +@@ -4175,8 +4569,8 @@ static int stbi__create_png_image(stbi__png *a, stbi_uc *image_data, stbi__uint3 + for (i=0; i < x; ++i) { + int out_y = j*yspc[p]+yorig[p]; + int out_x = i*xspc[p]+xorig[p]; +- memcpy(final + out_y*a->s->img_x*out_n + out_x*out_n, +- a->out + (j*x+i)*out_n, out_n); ++ memcpy(final + out_y*a->s->img_x*out_bytes + out_x*out_bytes, ++ a->out + (j*x+i)*out_bytes, out_bytes); + } + } + STBI_FREE(a->out); +@@ -4214,12 +4608,37 @@ static int stbi__compute_transparency(stbi__png *z, stbi_uc tc[3], int out_n) + return 1; + } + ++static int stbi__compute_transparency16(stbi__png *z, stbi__uint16 tc[3], int out_n) ++{ ++ stbi__context *s = z->s; ++ stbi__uint32 i, pixel_count = s->img_x * s->img_y; ++ stbi__uint16 *p = (stbi__uint16*) z->out; ++ ++ // compute color-based transparency, assuming we've ++ // already got 65535 as the alpha value in the output ++ STBI_ASSERT(out_n == 2 || out_n == 4); ++ ++ if (out_n == 2) { ++ for (i = 0; i < pixel_count; ++i) { ++ p[1] = (p[0] == tc[0] ? 0 : 65535); ++ p += 2; ++ } ++ } else { ++ for (i = 0; i < pixel_count; ++i) { ++ if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2]) ++ p[3] = 0; ++ p += 4; ++ } ++ } ++ return 1; ++} ++ + static int stbi__expand_png_palette(stbi__png *a, stbi_uc *palette, int len, int pal_img_n) + { + stbi__uint32 i, pixel_count = a->s->img_x * a->s->img_y; + stbi_uc *p, *temp_out, *orig = a->out; + +- p = (stbi_uc *) stbi__malloc(pixel_count * pal_img_n); ++ p = (stbi_uc *) stbi__malloc_mad2(pixel_count, pal_img_n, 0); + if (p == NULL) return stbi__err("outofmem", "Out of memory"); + + // between here and free(out) below, exitting would leak +@@ -4285,9 +4704,10 @@ static void stbi__de_iphone(stbi__png *z) + stbi_uc a = p[3]; + stbi_uc t = p[0]; + if (a) { +- p[0] = p[2] * 255 / a; +- p[1] = p[1] * 255 / a; +- p[2] = t * 255 / a; ++ stbi_uc half = a / 2; ++ p[0] = (p[2] * 255 + half) / a; ++ p[1] = (p[1] * 255 + half) / a; ++ p[2] = ( t * 255 + half) / a; + } else { + p[0] = p[2]; + p[2] = t; +@@ -4306,14 +4726,15 @@ static void stbi__de_iphone(stbi__png *z) + } + } + +-#define STBI__PNG_TYPE(a,b,c,d) (((a) << 24) + ((b) << 16) + ((c) << 8) + (d)) ++#define STBI__PNG_TYPE(a,b,c,d) (((unsigned) (a) << 24) + ((unsigned) (b) << 16) + ((unsigned) (c) << 8) + (unsigned) (d)) + + static int stbi__parse_png_file(stbi__png *z, int scan, int req_comp) + { + stbi_uc palette[1024], pal_img_n=0; + stbi_uc has_trans=0, tc[3]; ++ stbi__uint16 tc16[3]; + stbi__uint32 ioff=0, idata_limit=0, i, pal_len=0; +- int first=1,k,interlace=0, color=0, depth=0, is_iphone=0; ++ int first=1,k,interlace=0, color=0, is_iphone=0; + stbi__context *s = z->s; + + z->expanded = NULL; +@@ -4338,8 +4759,9 @@ static int stbi__parse_png_file(stbi__png *z, int scan, int req_comp) + if (c.length != 13) return stbi__err("bad IHDR len","Corrupt PNG"); + s->img_x = stbi__get32be(s); if (s->img_x > (1 << 24)) return stbi__err("too large","Very large image (corrupt?)"); + s->img_y = stbi__get32be(s); if (s->img_y > (1 << 24)) return stbi__err("too large","Very large image (corrupt?)"); +- depth = stbi__get8(s); if (depth != 1 && depth != 2 && depth != 4 && depth != 8) return stbi__err("1/2/4/8-bit only","PNG not supported: 1/2/4/8-bit only"); ++ z->depth = stbi__get8(s); if (z->depth != 1 && z->depth != 2 && z->depth != 4 && z->depth != 8 && z->depth != 16) return stbi__err("1/2/4/8/16-bit only","PNG not supported: 1/2/4/8/16-bit only"); + color = stbi__get8(s); if (color > 6) return stbi__err("bad ctype","Corrupt PNG"); ++ if (color == 3 && z->depth == 16) return stbi__err("bad ctype","Corrupt PNG"); + if (color == 3) pal_img_n = 3; else if (color & 1) return stbi__err("bad ctype","Corrupt PNG"); + comp = stbi__get8(s); if (comp) return stbi__err("bad comp method","Corrupt PNG"); + filter= stbi__get8(s); if (filter) return stbi__err("bad filter method","Corrupt PNG"); +@@ -4387,8 +4809,11 @@ static int stbi__parse_png_file(stbi__png *z, int scan, int req_comp) + if (!(s->img_n & 1)) return stbi__err("tRNS with alpha","Corrupt PNG"); + if (c.length != (stbi__uint32) s->img_n*2) return stbi__err("bad tRNS len","Corrupt PNG"); + has_trans = 1; +- for (k=0; k < s->img_n; ++k) +- tc[k] = (stbi_uc) (stbi__get16be(s) & 255) * stbi__depth_scale_table[depth]; // non 8-bit images will be larger ++ if (z->depth == 16) { ++ for (k = 0; k < s->img_n; ++k) tc16[k] = (stbi__uint16)stbi__get16be(s); // copy the values as-is ++ } else { ++ for (k = 0; k < s->img_n; ++k) tc[k] = (stbi_uc)(stbi__get16be(s) & 255) * stbi__depth_scale_table[z->depth]; // non 8-bit images will be larger ++ } + } + break; + } +@@ -4399,11 +4824,13 @@ static int stbi__parse_png_file(stbi__png *z, int scan, int req_comp) + if (scan == STBI__SCAN_header) { s->img_n = pal_img_n; return 1; } + if ((int)(ioff + c.length) < (int)ioff) return 0; + if (ioff + c.length > idata_limit) { ++ stbi__uint32 idata_limit_old = idata_limit; + stbi_uc *p; + if (idata_limit == 0) idata_limit = c.length > 4096 ? c.length : 4096; + while (ioff + c.length > idata_limit) + idata_limit *= 2; +- p = (stbi_uc *) STBI_REALLOC(z->idata, idata_limit); if (p == NULL) return stbi__err("outofmem", "Out of memory"); ++ STBI_NOTUSED(idata_limit_old); ++ p = (stbi_uc *) STBI_REALLOC_SIZED(z->idata, idata_limit_old, idata_limit); if (p == NULL) return stbi__err("outofmem", "Out of memory"); + z->idata = p; + } + if (!stbi__getn(s, z->idata+ioff,c.length)) return stbi__err("outofdata","Corrupt PNG"); +@@ -4417,7 +4844,7 @@ static int stbi__parse_png_file(stbi__png *z, int scan, int req_comp) + if (scan != STBI__SCAN_load) return 1; + if (z->idata == NULL) return stbi__err("no IDAT","Corrupt PNG"); + // initial guess for decoded data size to avoid unnecessary reallocs +- bpl = (s->img_x * depth + 7) / 8; // bytes per line, per component ++ bpl = (s->img_x * z->depth + 7) / 8; // bytes per line, per component + raw_len = bpl * s->img_y * s->img_n /* pixels */ + s->img_y /* filter mode per row */; + z->expanded = (stbi_uc *) stbi_zlib_decode_malloc_guesssize_headerflag((char *) z->idata, ioff, raw_len, (int *) &raw_len, !is_iphone); + if (z->expanded == NULL) return 0; // zlib should set error +@@ -4426,9 +4853,14 @@ static int stbi__parse_png_file(stbi__png *z, int scan, int req_comp) + s->img_out_n = s->img_n+1; + else + s->img_out_n = s->img_n; +- if (!stbi__create_png_image(z, z->expanded, raw_len, s->img_out_n, depth, color, interlace)) return 0; +- if (has_trans) +- if (!stbi__compute_transparency(z, tc, s->img_out_n)) return 0; ++ if (!stbi__create_png_image(z, z->expanded, raw_len, s->img_out_n, z->depth, color, interlace)) return 0; ++ if (has_trans) { ++ if (z->depth == 16) { ++ if (!stbi__compute_transparency16(z, tc16, s->img_out_n)) return 0; ++ } else { ++ if (!stbi__compute_transparency(z, tc, s->img_out_n)) return 0; ++ } ++ } + if (is_iphone && stbi__de_iphone_flag && s->img_out_n > 2) + stbi__de_iphone(z); + if (pal_img_n) { +@@ -4438,6 +4870,9 @@ static int stbi__parse_png_file(stbi__png *z, int scan, int req_comp) + if (req_comp >= 3) s->img_out_n = req_comp; + if (!stbi__expand_png_palette(z, palette, pal_len, s->img_out_n)) + return 0; ++ } else if (has_trans) { ++ // non-paletted image with tRNS -> source image has (constant) alpha ++ ++s->img_n; + } + STBI_FREE(z->expanded); z->expanded = NULL; + return 1; +@@ -4465,21 +4900,28 @@ static int stbi__parse_png_file(stbi__png *z, int scan, int req_comp) + } + } + +-static unsigned char *stbi__do_png(stbi__png *p, int *x, int *y, int *n, int req_comp) ++static void *stbi__do_png(stbi__png *p, int *x, int *y, int *n, int req_comp, stbi__result_info *ri) + { +- unsigned char *result=NULL; ++ void *result=NULL; + if (req_comp < 0 || req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error"); + if (stbi__parse_png_file(p, STBI__SCAN_load, req_comp)) { ++ if (p->depth < 8) ++ ri->bits_per_channel = 8; ++ else ++ ri->bits_per_channel = p->depth; + result = p->out; + p->out = NULL; + if (req_comp && req_comp != p->s->img_out_n) { +- result = stbi__convert_format(result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y); ++ if (ri->bits_per_channel == 8) ++ result = stbi__convert_format((unsigned char *) result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y); ++ else ++ result = stbi__convert_format16((stbi__uint16 *) result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y); + p->s->img_out_n = req_comp; + if (result == NULL) return result; + } + *x = p->s->img_x; + *y = p->s->img_y; +- if (n) *n = p->s->img_out_n; ++ if (n) *n = p->s->img_n; + } + STBI_FREE(p->out); p->out = NULL; + STBI_FREE(p->expanded); p->expanded = NULL; +@@ -4488,11 +4930,11 @@ static unsigned char *stbi__do_png(stbi__png *p, int *x, int *y, int *n, int req + return result; + } + +-static unsigned char *stbi__png_load(stbi__context *s, int *x, int *y, int *comp, int req_comp) ++static void *stbi__png_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) + { + stbi__png p; + p.s = s; +- return stbi__do_png(&p, x,y,comp,req_comp); ++ return stbi__do_png(&p, x,y,comp,req_comp, ri); + } + + static int stbi__png_test(stbi__context *s) +@@ -4521,11 +4963,24 @@ static int stbi__png_info(stbi__context *s, int *x, int *y, int *comp) + p.s = s; + return stbi__png_info_raw(&p, x, y, comp); + } ++ ++static int stbi__png_is16(stbi__context *s) ++{ ++ stbi__png p; ++ p.s = s; ++ if (!stbi__png_info_raw(&p, NULL, NULL, NULL)) ++ return 0; ++ if (p.depth != 16) { ++ stbi__rewind(p.s); ++ return 0; ++ } ++ return 1; ++} + #endif + + // Microsoft/Windows BMP image + +-#if !defined(STBI_NO_BMP) && !defined(STBI_NO_ICO) ++#ifndef STBI_NO_BMP + static int stbi__bmp_test_raw(stbi__context *s) + { + int r; +@@ -4572,31 +5027,46 @@ static int stbi__bitcount(unsigned int a) + return a & 0xff; + } + ++// extract an arbitrarily-aligned N-bit value (N=bits) ++// from v, and then make it 8-bits long and fractionally ++// extend it to full full range. + static int stbi__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 unsigned int mul_table[9] = { ++ 0, ++ 0xff/*0b11111111*/, 0x55/*0b01010101*/, 0x49/*0b01001001*/, 0x11/*0b00010001*/, ++ 0x21/*0b00100001*/, 0x41/*0b01000001*/, 0x81/*0b10000001*/, 0x01/*0b00000001*/, ++ }; ++ static unsigned int shift_table[9] = { ++ 0, 0,0,1,0,2,4,6,0, ++ }; ++ if (shift < 0) ++ v <<= -shift; ++ else ++ v >>= shift; ++ STBI_ASSERT(v >= 0 && v < 256); ++ v >>= (8-bits); ++ STBI_ASSERT(bits >= 0 && bits <= 8); ++ return (int) ((unsigned) v * mul_table[bits]) >> shift_table[bits]; + } + +-static stbi_uc *stbi__bmp_load_cont(stbi__context *s, int *x, int *y, int *comp, int req_comp, int offset, +- int hsz, int true_y) ++typedef struct + { +- stbi_uc *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; ++ int bpp, offset, hsz; ++ unsigned int mr,mg,mb,ma, all_a; ++} stbi__bmp_data; ++ ++static void *stbi__bmp_parse_header(stbi__context *s, stbi__bmp_data *info) ++{ ++ int hsz; ++ if (stbi__get8(s) != 'B' || stbi__get8(s) != 'M') return stbi__errpuc("not BMP", "Corrupt BMP"); ++ stbi__get32le(s); // discard filesize ++ stbi__get16le(s); // discard reserved ++ stbi__get16le(s); // discard reserved ++ info->offset = stbi__get32le(s); ++ info->hsz = hsz = stbi__get32le(s); ++ info->mr = info->mg = info->mb = info->ma = 0; ++ + if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108 && hsz != 124) return stbi__errpuc("unknown BMP", "BMP type not supported: unknown"); + if (hsz == 12) { + s->img_x = stbi__get16le(s); +@@ -4606,15 +5076,9 @@ static stbi_uc *stbi__bmp_load_cont(stbi__context *s, int *x, int *y, int *comp, + s->img_y = stbi__get32le(s); + } + if (stbi__get16le(s) != 1) return stbi__errpuc("bad BMP", "bad BMP"); +- bpp = stbi__get16le(s); +- if (bpp == 1) return stbi__errpuc("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 = stbi__get32le(s); ++ info->bpp = stbi__get16le(s); ++ if (hsz != 12) { ++ int compress = stbi__get32le(s); + if (compress == 1 || compress == 2) return stbi__errpuc("BMP RLE", "BMP type not supported: RLE"); + stbi__get32le(s); // discard sizeof + stbi__get32le(s); // discard hres +@@ -4628,27 +5092,25 @@ static stbi_uc *stbi__bmp_load_cont(stbi__context *s, int *x, int *y, int *comp, + stbi__get32le(s); + stbi__get32le(s); + } +- if (bpp == 16 || bpp == 32) { +- mr = mg = mb = 0; ++ if (info->bpp == 16 || info->bpp == 32) { + 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); ++ if (info->bpp == 32) { ++ info->mr = 0xffu << 16; ++ info->mg = 0xffu << 8; ++ info->mb = 0xffu << 0; ++ info->ma = 0xffu << 24; ++ info->all_a = 0; // if all_a is 0 at end, then we loaded alpha channel but it was all 0 + } else { +- mr = 31u << 10; +- mg = 31u << 5; +- mb = 31u << 0; ++ info->mr = 31u << 10; ++ info->mg = 31u << 5; ++ info->mb = 31u << 0; + } + } else if (compress == 3) { +- mr = stbi__get32le(s); +- mg = stbi__get32le(s); +- mb = stbi__get32le(s); ++ info->mr = stbi__get32le(s); ++ info->mg = stbi__get32le(s); ++ info->mb = stbi__get32le(s); + // not documented, but generated by photoshop and handled by mspaint +- if (mr == mg && mg == mb) { ++ if (info->mr == info->mg && info->mg == info->mb) { + // ?!?!? + return stbi__errpuc("bad BMP", "bad BMP"); + } +@@ -4656,11 +5118,13 @@ static stbi_uc *stbi__bmp_load_cont(stbi__context *s, int *x, int *y, int *comp, + return stbi__errpuc("bad BMP", "bad BMP"); + } + } else { +- STBI_ASSERT(hsz == 108 || hsz == 124); +- mr = stbi__get32le(s); +- mg = stbi__get32le(s); +- mb = stbi__get32le(s); +- ma = stbi__get32le(s); ++ int i; ++ if (hsz != 108 && hsz != 124) ++ return stbi__errpuc("bad BMP", "bad BMP"); ++ info->mr = stbi__get32le(s); ++ info->mg = stbi__get32le(s); ++ info->mb = stbi__get32le(s); ++ info->ma = stbi__get32le(s); + stbi__get32le(s); // discard color space + for (i=0; i < 12; ++i) + stbi__get32le(s); // discard color space parameters +@@ -4671,65 +5135,119 @@ static stbi_uc *stbi__bmp_load_cont(stbi__context *s, int *x, int *y, int *comp, + stbi__get32le(s); // discard reserved + } + } +- if (bpp < 16) +- psize = (offset - 14 - hsz) >> 2; + } ++ return (void *) 1; ++} ++ ++ ++static void *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) ++{ ++ stbi_uc *out; ++ unsigned int mr=0,mg=0,mb=0,ma=0, all_a; ++ stbi_uc pal[256][4]; ++ int psize=0,i,j,width; ++ int flip_vertically, pad, target; ++ stbi__bmp_data info; ++ STBI_NOTUSED(ri); ++ ++ info.all_a = 255; ++ if (stbi__bmp_parse_header(s, &info) == NULL) ++ return NULL; // error code already set ++ ++ flip_vertically = ((int) s->img_y) > 0; ++ s->img_y = abs((int) s->img_y); ++ ++ mr = info.mr; ++ mg = info.mg; ++ mb = info.mb; ++ ma = info.ma; ++ all_a = info.all_a; ++ ++ if (info.hsz == 12) { ++ if (info.bpp < 24) ++ psize = (info.offset - 14 - 24) / 3; ++ } else { ++ if (info.bpp < 16) ++ psize = (info.offset - 14 - info.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 +- if (true_y) +- s->img_y = true_y; +- out = (stbi_uc *) stbi__malloc(target * s->img_x * s->img_y); ++ ++ // sanity-check size ++ if (!stbi__mad3sizes_valid(target, s->img_x, s->img_y, 0)) ++ return stbi__errpuc("too large", "Corrupt BMP"); ++ ++ out = (stbi_uc *) stbi__malloc_mad3(target, s->img_x, s->img_y, 0); + if (!out) return stbi__errpuc("outofmem", "Out of memory"); +- if (bpp < 16) { ++ if (info.bpp < 16) { + int z=0; + if (psize == 0 || psize > 256) { STBI_FREE(out); return stbi__errpuc("invalid", "Corrupt BMP"); } + for (i=0; i < psize; ++i) { + pal[i][2] = stbi__get8(s); + pal[i][1] = stbi__get8(s); + pal[i][0] = stbi__get8(s); +- if (hsz != 12) stbi__get8(s); ++ if (info.hsz != 12) stbi__get8(s); + pal[i][3] = 255; + } +- stbi__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; ++ stbi__skip(s, info.offset - 14 - info.hsz - psize * (info.hsz == 12 ? 3 : 4)); ++ if (info.bpp == 1) width = (s->img_x + 7) >> 3; ++ else if (info.bpp == 4) width = (s->img_x + 1) >> 1; ++ else if (info.bpp == 8) width = s->img_x; + else { STBI_FREE(out); return stbi__errpuc("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=stbi__get8(s),v2=0; +- if (bpp == 4) { +- v2 = v & 15; +- v >>= 4; ++ if (info.bpp == 1) { ++ for (j=0; j < (int) s->img_y; ++j) { ++ int bit_offset = 7, v = stbi__get8(s); ++ for (i=0; i < (int) s->img_x; ++i) { ++ int color = (v>>bit_offset)&0x1; ++ out[z++] = pal[color][0]; ++ out[z++] = pal[color][1]; ++ out[z++] = pal[color][2]; ++ if((--bit_offset) < 0) { ++ bit_offset = 7; ++ v = stbi__get8(s); ++ } + } +- 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) ? stbi__get8(s) : v2; +- out[z++] = pal[v][0]; +- out[z++] = pal[v][1]; +- out[z++] = pal[v][2]; +- if (target == 4) out[z++] = 255; ++ stbi__skip(s, pad); ++ } ++ } else { ++ for (j=0; j < (int) s->img_y; ++j) { ++ for (i=0; i < (int) s->img_x; i += 2) { ++ int v=stbi__get8(s),v2=0; ++ if (info.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 = (info.bpp == 8) ? stbi__get8(s) : v2; ++ out[z++] = pal[v][0]; ++ out[z++] = pal[v][1]; ++ out[z++] = pal[v][2]; ++ if (target == 4) out[z++] = 255; ++ } ++ stbi__skip(s, pad); + } +- stbi__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; +- stbi__skip(s, offset - 14 - hsz); +- if (bpp == 24) width = 3 * s->img_x; +- else if (bpp == 16) width = 2*s->img_x; ++ stbi__skip(s, info.offset - 14 - info.hsz); ++ if (info.bpp == 24) width = 3 * s->img_x; ++ else if (info.bpp == 16) width = 2*s->img_x; + else /* bpp = 32 and pad = 0 */ width=0; + pad = (-width) & 3; +- if (bpp == 24) { ++ if (info.bpp == 24) { + easy = 1; +- } else if (bpp == 32) { ++ } else if (info.bpp == 32) { + if (mb == 0xff && mg == 0xff00 && mr == 0x00ff0000 && ma == 0xff000000) + easy = 2; + } +@@ -4750,22 +5268,31 @@ static stbi_uc *stbi__bmp_load_cont(stbi__context *s, int *x, int *y, int *comp, + out[z+0] = stbi__get8(s); + z += 3; + a = (easy == 2 ? stbi__get8(s) : 255); ++ all_a |= a; + if (target == 4) out[z++] = a; + } + } else { ++ int bpp = info.bpp; + for (i=0; i < (int) s->img_x; ++i) { + stbi__uint32 v = (bpp == 16 ? (stbi__uint32) stbi__get16le(s) : stbi__get32le(s)); +- int a; ++ unsigned int a; + out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mr, rshift, rcount)); + out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mg, gshift, gcount)); + out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mb, bshift, bcount)); + a = (ma ? stbi__shiftsigned(v & ma, ashift, acount) : 255); ++ all_a |= a; + if (target == 4) out[z++] = STBI__BYTECAST(a); + } + } + stbi__skip(s, pad); + } + } ++ ++ // if alpha channel is all 0s, replace with all 255s ++ if (target == 4 && all_a == 0) ++ for (i=4*s->img_x*s->img_y-1; i >= 0; i -= 4) ++ out[i] = 255; ++ + if (flip_vertically) { + stbi_uc t; + for (j=0; j < (int) s->img_y>>1; ++j) { +@@ -4787,113 +5314,60 @@ static stbi_uc *stbi__bmp_load_cont(stbi__context *s, int *x, int *y, int *comp, + if (comp) *comp = s->img_n; + return out; + } +- +-static stbi_uc *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp) +-{ +- int offset, hsz; +- if (stbi__get8(s) != 'B' || stbi__get8(s) != 'M') return stbi__errpuc("not BMP", "Corrupt BMP"); +- stbi__get32le(s); // discard filesize +- stbi__get16le(s); // discard reserved +- stbi__get16le(s); // discard reserved +- offset = stbi__get32le(s); +- hsz = stbi__get32le(s); +- return stbi__bmp_load_cont(s, x, y, comp, req_comp, offset, hsz, 0); +-} +-#endif +- +-// Microsoft/Windows ICO image +- +-#ifndef STBI_NO_ICO +-static int stbi__ico_test_raw(stbi__context *s) +-{ +- int bpp; +- if (stbi__get8(s) != 0) return 0; +- if (stbi__get8(s) != 0) return 0; +- if (stbi__get8(s) != 1) return 0; +- if (stbi__get8(s) != 0) return 0; +- if (stbi__get8(s) == 0) return 0; // accept any "number of images" from 1 to 255, +- if (stbi__get8(s) != 0) return 0; // so the MSB needs to be 0. +- +- stbi__get8(s); // discard width +- stbi__get8(s); // discard height +- stbi__get8(s); // discard number of pallete entries +- if (stbi__get8(s) != 0) return 0; +- if (stbi__get8(s) > 1) return 0; +- if (stbi__get8(s) != 0) return 0; +- +- bpp = stbi__get8(s); // accept only common bit depths +- if (bpp != 0 && bpp != 1 && bpp != 2 && bpp != 4 && bpp != 8 && bpp != 16 && bpp != 24 && bpp != 32) return 0; +- if (stbi__get8(s) != 0) return 0; +- +- return 1; +-} +- +-static int stbi__ico_test(stbi__context *s) +-{ +- int r = stbi__ico_test_raw(s); +- stbi__rewind(s); +- return r; +-} +- +-static stbi_uc *stbi__ico_load(stbi__context *s, int *x, int *y, int *comp, int req_comp) +-{ +- int n, planes, bpp, offset, hsz; +- +- n = stbi__get32le(s); +- if (n == 0x00020000) return stbi__errpuc("not ICO", "Unsupported CURsor file"); +- if (n != 0x00010000) return stbi__errpuc("not ICO", "Corrupt ICO"); +- n = stbi__get16le(s); +- if (n < 0 || n > 255) return stbi__errpuc("not ICO", "Corrupt ICO"); +- +- s->img_x = stbi__get8(s); +- s->img_y = stbi__get8(s); +- if (!s->img_x) s->img_x = 256; +- if (!s->img_y) s->img_y = 256; +- n = stbi__get16le(s); // number of pallete entries +- if (n == 1) return stbi__errpuc("not ICO", "Corrupt ICO"); +- planes = stbi__get16le(s); +- if (planes > 1) return stbi__errpuc("not ICO", "Corrupt ICO"); +- bpp = stbi__get16le(s); +- if (bpp == 0) bpp = 8; // Some ICO files have 0 bpp! +- if (bpp != 1 && bpp != 2 && bpp != 4 && bpp != 8 && bpp != 16 && bpp != 24 && bpp != 32) +- return stbi__errpuc("not ICO", "Corrupt ICO"); +- stbi__get32le(s); // discard size +- offset = stbi__get32le(s); +- if (!n && bpp == 8) +- n = 256; // Fixes loading of some ICO files. +- stbi__skip(s, offset - 22); +- hsz = stbi__get32le(s); +- if (hsz != 0x474e5089) +- return stbi__bmp_load_cont(s, x, y, comp, req_comp, n * 4 + 14 + hsz, hsz, s->img_y); +-#ifndef STBI_NO_PNG +- // Rewind and go to PNG start again +- stbi__rewind(s); +- stbi__skip(s, offset); +- return stbi__png_load(s, x, y, comp, req_comp); +-#else +- return stbi__errpuc("PNG", "PNG support not compiled"); +-#endif +-} +- + #endif + + // Targa Truevision - TGA + // by Jonathan Dummer + #ifndef STBI_NO_TGA ++// returns STBI_rgb or whatever, 0 on error ++static int stbi__tga_get_comp(int bits_per_pixel, int is_grey, int* is_rgb16) ++{ ++ // only RGB or RGBA (incl. 16bit) or grey allowed ++ if (is_rgb16) *is_rgb16 = 0; ++ switch(bits_per_pixel) { ++ case 8: return STBI_grey; ++ case 16: if(is_grey) return STBI_grey_alpha; ++ // fallthrough ++ case 15: if(is_rgb16) *is_rgb16 = 1; ++ return STBI_rgb; ++ case 24: // fallthrough ++ case 32: return bits_per_pixel/8; ++ default: return 0; ++ } ++} ++ + static int stbi__tga_info(stbi__context *s, int *x, int *y, int *comp) + { +- int tga_w, tga_h, tga_comp; +- int sz; ++ int tga_w, tga_h, tga_comp, tga_image_type, tga_bits_per_pixel, tga_colormap_bpp; ++ int sz, tga_colormap_type; + stbi__get8(s); // discard Offset +- sz = stbi__get8(s); // color type +- if( sz > 1 ) { ++ tga_colormap_type = stbi__get8(s); // colormap type ++ if( tga_colormap_type > 1 ) { + stbi__rewind(s); + return 0; // only RGB or indexed allowed + } +- sz = stbi__get8(s); // image type +- // only RGB or grey allowed, +/- RLE +- if ((sz != 1) && (sz != 2) && (sz != 3) && (sz != 9) && (sz != 10) && (sz != 11)) return 0; +- stbi__skip(s,9); ++ tga_image_type = stbi__get8(s); // image type ++ if ( tga_colormap_type == 1 ) { // colormapped (paletted) image ++ if (tga_image_type != 1 && tga_image_type != 9) { ++ stbi__rewind(s); ++ return 0; ++ } ++ stbi__skip(s,4); // skip index of first colormap entry and number of entries ++ sz = stbi__get8(s); // check bits per palette color entry ++ if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) { ++ stbi__rewind(s); ++ return 0; ++ } ++ stbi__skip(s,4); // skip image x and y origin ++ tga_colormap_bpp = sz; ++ } else { // "normal" image w/o colormap - only RGB or grey allowed, +/- RLE ++ if ( (tga_image_type != 2) && (tga_image_type != 3) && (tga_image_type != 10) && (tga_image_type != 11) ) { ++ stbi__rewind(s); ++ return 0; // only RGB or grey allowed, +/- RLE ++ } ++ stbi__skip(s,9); // skip colormap specification and image x/y origin ++ tga_colormap_bpp = 0; ++ } + tga_w = stbi__get16le(s); + if( tga_w < 1 ) { + stbi__rewind(s); +@@ -4904,45 +5378,81 @@ static int stbi__tga_info(stbi__context *s, int *x, int *y, int *comp) + stbi__rewind(s); + return 0; // test height + } +- sz = stbi__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_bits_per_pixel = stbi__get8(s); // bits per pixel ++ stbi__get8(s); // ignore alpha bits ++ if (tga_colormap_bpp != 0) { ++ if((tga_bits_per_pixel != 8) && (tga_bits_per_pixel != 16)) { ++ // when using a colormap, tga_bits_per_pixel is the size of the indexes ++ // I don't think anything but 8 or 16bit indexes makes sense ++ stbi__rewind(s); ++ return 0; ++ } ++ tga_comp = stbi__tga_get_comp(tga_colormap_bpp, 0, NULL); ++ } else { ++ tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3) || (tga_image_type == 11), NULL); ++ } ++ if(!tga_comp) { ++ stbi__rewind(s); ++ return 0; + } +- tga_comp = sz; + if (x) *x = tga_w; + if (y) *y = tga_h; +- if (comp) *comp = tga_comp / 8; ++ if (comp) *comp = tga_comp; + return 1; // seems to have passed everything + } + + static int stbi__tga_test(stbi__context *s) + { +- int res; +- int sz; ++ int res = 0; ++ int sz, tga_color_type; + stbi__get8(s); // discard Offset +- sz = stbi__get8(s); // color type +- if ( sz > 1 ) return 0; // only RGB or indexed allowed ++ tga_color_type = stbi__get8(s); // color type ++ if ( tga_color_type > 1 ) goto errorEnd; // only RGB or indexed allowed + sz = stbi__get8(s); // image type +- if ( (sz != 1) && (sz != 2) && (sz != 3) && (sz != 9) && (sz != 10) && (sz != 11) ) return 0; // only RGB or grey allowed, +/- RLE +- stbi__get16be(s); // discard palette start +- stbi__get16be(s); // discard palette length +- stbi__get8(s); // discard bits per palette color entry +- stbi__get16be(s); // discard x origin +- stbi__get16be(s); // discard y origin +- if ( stbi__get16be(s) < 1 ) return 0; // test width +- if ( stbi__get16be(s) < 1 ) return 0; // test height ++ if ( tga_color_type == 1 ) { // colormapped (paletted) image ++ if (sz != 1 && sz != 9) goto errorEnd; // colortype 1 demands image type 1 or 9 ++ stbi__skip(s,4); // skip index of first colormap entry and number of entries ++ sz = stbi__get8(s); // check bits per palette color entry ++ if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) goto errorEnd; ++ stbi__skip(s,4); // skip image x and y origin ++ } else { // "normal" image w/o colormap ++ if ( (sz != 2) && (sz != 3) && (sz != 10) && (sz != 11) ) goto errorEnd; // only RGB or grey allowed, +/- RLE ++ stbi__skip(s,9); // skip colormap specification and image x/y origin ++ } ++ if ( stbi__get16le(s) < 1 ) goto errorEnd; // test width ++ if ( stbi__get16le(s) < 1 ) goto errorEnd; // test height + sz = stbi__get8(s); // bits per pixel +- if ( (sz != 8) && (sz != 16) && (sz != 24) && (sz != 32) ) +- res = 0; +- else +- res = 1; ++ if ( (tga_color_type == 1) && (sz != 8) && (sz != 16) ) goto errorEnd; // for colormapped images, bpp is size of an index ++ if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) goto errorEnd; ++ ++ res = 1; // if we got this far, everything's good and we can return 1 instead of 0 ++ ++errorEnd: + stbi__rewind(s); + return res; + } + +-static stbi_uc *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int req_comp) ++// read 16bit value and convert to 24bit RGB ++static void stbi__tga_read_rgb16(stbi__context *s, stbi_uc* out) ++{ ++ stbi__uint16 px = (stbi__uint16)stbi__get16le(s); ++ stbi__uint16 fiveBitMask = 31; ++ // we have 3 channels with 5bits each ++ int r = (px >> 10) & fiveBitMask; ++ int g = (px >> 5) & fiveBitMask; ++ int b = px & fiveBitMask; ++ // Note that this saves the data in RGB(A) order, so it doesn't need to be swapped later ++ out[0] = (stbi_uc)((r * 255)/31); ++ out[1] = (stbi_uc)((g * 255)/31); ++ out[2] = (stbi_uc)((b * 255)/31); ++ ++ // some people claim that the most significant bit might be used for alpha ++ // (possibly if an alpha-bit is set in the "image descriptor byte") ++ // but that only made 16bit test images completely translucent.. ++ // so let's treat all 15 and 16bit TGAs as RGB with no alpha. ++} ++ ++static void *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) + { + // read in the TGA header stuff + int tga_offset = stbi__get8(s); +@@ -4957,16 +5467,18 @@ static stbi_uc *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int + int tga_width = stbi__get16le(s); + int tga_height = stbi__get16le(s); + int tga_bits_per_pixel = stbi__get8(s); +- int tga_comp = tga_bits_per_pixel / 8; ++ int tga_comp, tga_rgb16=0; + int tga_inverted = stbi__get8(s); ++ // int tga_alpha_bits = tga_inverted & 15; // the 4 lowest bits - unused (useless?) + // image data + unsigned char *tga_data; + unsigned char *tga_palette = NULL; + int i, j; +- unsigned char raw_data[4]; ++ unsigned char raw_data[4] = {0}; + int RLE_count = 0; + int RLE_repeating = 0; + int read_next_pixel = 1; ++ STBI_NOTUSED(ri); + + // do a tiny bit of precessing + if ( tga_image_type >= 8 ) +@@ -4974,41 +5486,33 @@ static stbi_uc *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int + 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; +- } ++ if ( tga_indexed ) tga_comp = stbi__tga_get_comp(tga_palette_bits, 0, &tga_rgb16); ++ else tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3), &tga_rgb16); ++ ++ if(!tga_comp) // shouldn't really happen, stbi__tga_test() should have ensured basic consistency ++ return stbi__errpuc("bad format", "Can't find out TGA pixelformat"); + + // tga info + *x = tga_width; + *y = tga_height; + if (comp) *comp = tga_comp; + +- tga_data = (unsigned char*)stbi__malloc( (size_t)tga_width * tga_height * tga_comp ); ++ if (!stbi__mad3sizes_valid(tga_width, tga_height, tga_comp, 0)) ++ return stbi__errpuc("too large", "Corrupt TGA"); ++ ++ tga_data = (unsigned char*)stbi__malloc_mad3(tga_width, tga_height, tga_comp, 0); + if (!tga_data) return stbi__errpuc("outofmem", "Out of memory"); + + // skip to the data's starting position (offset usually = 0) + stbi__skip(s, tga_offset ); + +- if ( !tga_indexed && !tga_is_RLE) { ++ if ( !tga_indexed && !tga_is_RLE && !tga_rgb16 ) { + for (i=0; i < tga_height; ++i) { +- int y = tga_inverted ? tga_height -i - 1 : i; +- stbi_uc *tga_row = tga_data + y*tga_width*tga_comp; ++ int row = tga_inverted ? tga_height -i - 1 : i; ++ stbi_uc *tga_row = tga_data + row*tga_width*tga_comp; + stbi__getn(s, tga_row, tga_width * tga_comp); + } + } else { +@@ -5018,15 +5522,22 @@ static stbi_uc *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int + // any data to skip? (offset usually = 0) + stbi__skip(s, tga_palette_start ); + // load the palette +- tga_palette = (unsigned char*)stbi__malloc( tga_palette_len * tga_palette_bits / 8 ); ++ tga_palette = (unsigned char*)stbi__malloc_mad2(tga_palette_len, tga_comp, 0); + if (!tga_palette) { + STBI_FREE(tga_data); + return stbi__errpuc("outofmem", "Out of memory"); + } +- if (!stbi__getn(s, tga_palette, tga_palette_len * tga_palette_bits / 8 )) { +- STBI_FREE(tga_data); +- STBI_FREE(tga_palette); +- return stbi__errpuc("bad palette", "Corrupt TGA"); ++ if (tga_rgb16) { ++ stbi_uc *pal_entry = tga_palette; ++ STBI_ASSERT(tga_comp == STBI_rgb); ++ for (i=0; i < tga_palette_len; ++i) { ++ stbi__tga_read_rgb16(s, pal_entry); ++ pal_entry += tga_comp; ++ } ++ } else if (!stbi__getn(s, tga_palette, tga_palette_len * tga_comp)) { ++ STBI_FREE(tga_data); ++ STBI_FREE(tga_palette); ++ return stbi__errpuc("bad palette", "Corrupt TGA"); + } + } + // load the data +@@ -5056,23 +5567,22 @@ static stbi_uc *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int + // load however much data we did have + if ( tga_indexed ) + { +- // read in 1 byte, then perform the lookup +- int pal_idx = stbi__get8(s); +- if ( pal_idx >= tga_palette_len ) +- { +- // invalid index ++ // read in index, then perform the lookup ++ int pal_idx = (tga_bits_per_pixel == 8) ? stbi__get8(s) : stbi__get16le(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) +- { ++ pal_idx *= tga_comp; ++ for (j = 0; j < tga_comp; ++j) { + raw_data[j] = tga_palette[pal_idx+j]; + } +- } else +- { ++ } else if(tga_rgb16) { ++ STBI_ASSERT(tga_comp == STBI_rgb); ++ stbi__tga_read_rgb16(s, raw_data); ++ } else { + // read in the data raw +- for (j = 0; j*8 < tga_bits_per_pixel; ++j) +- { ++ for (j = 0; j < tga_comp; ++j) { + raw_data[j] = stbi__get8(s); + } + } +@@ -5111,8 +5621,8 @@ static stbi_uc *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int + } + } + +- // swap RGB +- if (tga_comp >= 3) ++ // swap RGB - if the source data was RGB16, it already is in the right order ++ if (tga_comp >= 3 && !tga_rgb16) + { + unsigned char* tga_pixel = tga_data; + for (i=0; i < tga_width * tga_height; ++i) +@@ -5148,13 +5658,53 @@ static int stbi__psd_test(stbi__context *s) + return r; + } + +-static stbi_uc *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int req_comp) ++static int stbi__psd_decode_rle(stbi__context *s, stbi_uc *p, int pixelCount) + { +- int pixelCount; ++ int count, nleft, len; ++ ++ count = 0; ++ while ((nleft = pixelCount - count) > 0) { ++ len = stbi__get8(s); ++ if (len == 128) { ++ // No-op. ++ } else if (len < 128) { ++ // Copy next len+1 bytes literally. ++ len++; ++ if (len > nleft) return 0; // corrupt data ++ count += len; ++ while (len) { ++ *p = stbi__get8(s); ++ p += 4; ++ len--; ++ } ++ } else if (len > 128) { ++ stbi_uc val; ++ // Next -len+1 bytes in the dest are replicated from next source byte. ++ // (Interpret len as a negative 8-bit int.) ++ len = 257 - len; ++ if (len > nleft) return 0; // corrupt data ++ val = stbi__get8(s); ++ count += len; ++ while (len) { ++ *p = val; ++ p += 4; ++ len--; ++ } ++ } ++ } ++ ++ return 1; ++} ++ ++static void *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc) ++{ ++ int pixelCount; + int channelCount, compression; +- int channel, i, count, len; ++ int channel, i; ++ int bitdepth; + int w,h; + stbi_uc *out; ++ STBI_NOTUSED(ri); + + // Check identifier + if (stbi__get32be(s) != 0x38425053) // "8BPS" +@@ -5177,8 +5727,9 @@ static stbi_uc *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int + w = stbi__get32be(s); + + // Make sure the depth is 8 bits. +- if (stbi__get16be(s) != 8) +- return stbi__errpuc("unsupported bit depth", "PSD bit depth is not 8 bit"); ++ bitdepth = stbi__get16be(s); ++ if (bitdepth != 8 && bitdepth != 16) ++ return stbi__errpuc("unsupported bit depth", "PSD bit depth is not 8 or 16 bit"); + + // Make sure the color mode is RGB. + // Valid options are: +@@ -5210,8 +5761,18 @@ static stbi_uc *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int + if (compression > 1) + return stbi__errpuc("bad compression", "PSD has an unknown compression format"); + ++ // Check size ++ if (!stbi__mad3sizes_valid(4, w, h, 0)) ++ return stbi__errpuc("too large", "Corrupt PSD"); ++ + // Create the destination image. +- out = (stbi_uc *) stbi__malloc(4 * w*h); ++ ++ if (!compression && bitdepth == 16 && bpc == 16) { ++ out = (stbi_uc *) stbi__malloc_mad3(8, w, h, 0); ++ ri->bits_per_channel = 16; ++ } else ++ out = (stbi_uc *) stbi__malloc(4 * w*h); ++ + if (!out) return stbi__errpuc("outofmem", "Out of memory"); + pixelCount = w*h; + +@@ -5243,61 +5804,86 @@ static stbi_uc *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int + *p = (channel == 3 ? 255 : 0); + } else { + // Read the RLE data. +- count = 0; +- while (count < pixelCount) { +- len = stbi__get8(s); +- if (len == 128) { +- // No-op. +- } else if (len < 128) { +- // Copy next len+1 bytes literally. +- len++; +- count += len; +- while (len) { +- *p = stbi__get8(s); +- p += 4; +- len--; +- } +- } else if (len > 128) { +- stbi_uc val; +- // Next -len+1 bytes in the dest are replicated from next source byte. +- // (Interpret len as a negative 8-bit int.) +- len ^= 0x0FF; +- len += 2; +- val = stbi__get8(s); +- count += len; +- while (len) { +- *p = val; +- p += 4; +- len--; +- } +- } ++ if (!stbi__psd_decode_rle(s, p, pixelCount)) { ++ STBI_FREE(out); ++ return stbi__errpuc("corrupt", "bad RLE data"); + } + } + } + + } else { + // We're at the raw image data. It's each channel in order (Red, Green, Blue, Alpha, ...) +- // where each channel consists of an 8-bit value for each pixel in the image. ++ // where each channel consists of an 8-bit (or 16-bit) value for each pixel in the image. + + // Read the data by channel. + for (channel = 0; channel < 4; channel++) { +- stbi_uc *p; +- +- p = out + channel; +- if (channel > channelCount) { ++ if (channel >= channelCount) { + // Fill this channel with default data. +- for (i = 0; i < pixelCount; i++, p += 4) +- *p = channel == 3 ? 255 : 0; ++ if (bitdepth == 16 && bpc == 16) { ++ stbi__uint16 *q = ((stbi__uint16 *) out) + channel; ++ stbi__uint16 val = channel == 3 ? 65535 : 0; ++ for (i = 0; i < pixelCount; i++, q += 4) ++ *q = val; ++ } else { ++ stbi_uc *p = out+channel; ++ stbi_uc val = channel == 3 ? 255 : 0; ++ for (i = 0; i < pixelCount; i++, p += 4) ++ *p = val; ++ } + } else { +- // Read the data. +- for (i = 0; i < pixelCount; i++, p += 4) +- *p = stbi__get8(s); ++ if (ri->bits_per_channel == 16) { // output bpc ++ stbi__uint16 *q = ((stbi__uint16 *) out) + channel; ++ for (i = 0; i < pixelCount; i++, q += 4) ++ *q = (stbi__uint16) stbi__get16be(s); ++ } else { ++ stbi_uc *p = out+channel; ++ if (bitdepth == 16) { // input bpc ++ for (i = 0; i < pixelCount; i++, p += 4) ++ *p = (stbi_uc) (stbi__get16be(s) >> 8); ++ } else { ++ for (i = 0; i < pixelCount; i++, p += 4) ++ *p = stbi__get8(s); ++ } ++ } + } + } + } + ++ // remove weird white matte from PSD ++ if (channelCount >= 4) { ++ if (ri->bits_per_channel == 16) { ++ for (i=0; i < w*h; ++i) { ++ stbi__uint16 *pixel = (stbi__uint16 *) out + 4*i; ++ if (pixel[3] != 0 && pixel[3] != 65535) { ++ float a = pixel[3] / 65535.0f; ++ float ra = 1.0f / a; ++ float inv_a = 65535.0f * (1 - ra); ++ pixel[0] = (stbi__uint16) (pixel[0]*ra + inv_a); ++ pixel[1] = (stbi__uint16) (pixel[1]*ra + inv_a); ++ pixel[2] = (stbi__uint16) (pixel[2]*ra + inv_a); ++ } ++ } ++ } else { ++ for (i=0; i < w*h; ++i) { ++ unsigned char *pixel = out + 4*i; ++ if (pixel[3] != 0 && pixel[3] != 255) { ++ float a = pixel[3] / 255.0f; ++ float ra = 1.0f / a; ++ float inv_a = 255.0f * (1 - ra); ++ pixel[0] = (unsigned char) (pixel[0]*ra + inv_a); ++ pixel[1] = (unsigned char) (pixel[1]*ra + inv_a); ++ pixel[2] = (unsigned char) (pixel[2]*ra + inv_a); ++ } ++ } ++ } ++ } ++ ++ // convert to desired output format + if (req_comp && req_comp != 4) { +- out = stbi__convert_format(out, 4, req_comp, w, h); ++ if (ri->bits_per_channel == 16) ++ out = (stbi_uc *) stbi__convert_format16((stbi__uint16 *) out, 4, req_comp, w, h); ++ else ++ out = stbi__convert_format(out, 4, req_comp, w, h); + if (out == NULL) return out; // stbi__convert_format frees input on failure + } + +@@ -5449,7 +6035,6 @@ static stbi_uc *stbi__pic_load_core(stbi__context *s,int width,int height,int *c + + if (count >= 128) { // Repeated + stbi_uc value[4]; +- int i; + + if (count==128) + count = stbi__get16be(s); +@@ -5482,10 +6067,13 @@ static stbi_uc *stbi__pic_load_core(stbi__context *s,int width,int height,int *c + return result; + } + +-static stbi_uc *stbi__pic_load(stbi__context *s,int *px,int *py,int *comp,int req_comp) ++static void *stbi__pic_load(stbi__context *s,int *px,int *py,int *comp,int req_comp, stbi__result_info *ri) + { + stbi_uc *result; +- int i, x,y; ++ int i, x,y, internal_comp; ++ STBI_NOTUSED(ri); ++ ++ if (!comp) comp = &internal_comp; + + for (i=0; i<92; ++i) + stbi__get8(s); +@@ -5493,14 +6081,14 @@ static stbi_uc *stbi__pic_load(stbi__context *s,int *px,int *py,int *comp,int re + x = stbi__get16be(s); + y = stbi__get16be(s); + if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (pic header)"); +- if ((1 << 28) / x < y) return stbi__errpuc("too large", "Image too large to decode"); ++ if (!stbi__mad3sizes_valid(x, y, 4, 0)) return stbi__errpuc("too large", "PIC image too large to decode"); + + stbi__get32be(s); //skip `ratio' + stbi__get16be(s); //skip `fields' + stbi__get16be(s); //skip `pad' + + // intermediate buffer is RGBA +- result = (stbi_uc *) stbi__malloc(x*y*4); ++ result = (stbi_uc *) stbi__malloc_mad3(x, y, 4, 0); + memset(result, 0xff, x*y*4); + + if (!stbi__pic_load_core(s,x,y,comp, result)) { +@@ -5537,11 +6125,13 @@ typedef struct + typedef struct + { + int w,h; +- stbi_uc *out, *old_out; // output buffer (always 4 components) +- int flags, bgindex, ratio, transparent, eflags, delay; ++ stbi_uc *out; // output buffer (always 4 components) ++ stbi_uc *background; // The current "background" as far as a gif is concerned ++ stbi_uc *history; ++ int flags, bgindex, ratio, transparent, eflags; + stbi_uc pal[256][4]; + stbi_uc lpal[256][4]; +- stbi__gif_lzw codes[4096]; ++ stbi__gif_lzw codes[8192]; + stbi_uc *color_table; + int parse, step; + int lflags; +@@ -5549,6 +6139,7 @@ typedef struct + int max_x, max_y; + int cur_x, cur_y; + int line_size; ++ int delay; + } stbi__gif; + + static int stbi__gif_test_raw(stbi__context *s) +@@ -5609,19 +6200,22 @@ static int stbi__gif_header(stbi__context *s, stbi__gif *g, int *comp, int is_in + + static int stbi__gif_info_raw(stbi__context *s, int *x, int *y, int *comp) + { +- stbi__gif g; +- if (!stbi__gif_header(s, &g, comp, 1)) { ++ stbi__gif* g = (stbi__gif*) stbi__malloc(sizeof(stbi__gif)); ++ if (!stbi__gif_header(s, g, comp, 1)) { ++ STBI_FREE(g); + stbi__rewind( s ); + return 0; + } +- if (x) *x = g.w; +- if (y) *y = g.h; ++ if (x) *x = g->w; ++ if (y) *y = g->h; ++ STBI_FREE(g); + return 1; + } + + static void stbi__out_gif_code(stbi__gif *g, stbi__uint16 code) + { + stbi_uc *p, *c; ++ int idx; + + // recurse to decode the prefixes, since the linked-list is backwards, + // and working backwards through an interleaved image would be nasty +@@ -5630,10 +6224,12 @@ static void stbi__out_gif_code(stbi__gif *g, stbi__uint16 code) + + if (g->cur_y >= g->max_y) return; + +- p = &g->out[g->cur_x + g->cur_y]; +- c = &g->color_table[g->codes[code].suffix * 4]; ++ idx = g->cur_x + g->cur_y; ++ p = &g->out[idx]; ++ g->history[idx / 4] = 1; + +- if (c[3] >= 128) { ++ c = &g->color_table[g->codes[code].suffix * 4]; ++ if (c[3] > 128) { // don't render transparent pixels; + p[0] = c[2]; + p[1] = c[1]; + p[2] = c[0]; +@@ -5656,7 +6252,7 @@ static void stbi__out_gif_code(stbi__gif *g, stbi__uint16 code) + static stbi_uc *stbi__process_gif_raster(stbi__context *s, stbi__gif *g) + { + stbi_uc lzw_cs; +- stbi__int32 len, code; ++ stbi__int32 len, init_code; + stbi__uint32 first; + stbi__int32 codesize, codemask, avail, oldcode, bits, valid_bits, clear; + stbi__gif_lzw *p; +@@ -5669,10 +6265,10 @@ static stbi_uc *stbi__process_gif_raster(stbi__context *s, stbi__gif *g) + codemask = (1 << codesize) - 1; + bits = 0; + valid_bits = 0; +- for (code = 0; code < clear; code++) { +- g->codes[code].prefix = -1; +- g->codes[code].first = (stbi_uc) code; +- g->codes[code].suffix = (stbi_uc) code; ++ for (init_code = 0; init_code < clear; init_code++) { ++ g->codes[init_code].prefix = -1; ++ g->codes[init_code].first = (stbi_uc) init_code; ++ g->codes[init_code].suffix = (stbi_uc) init_code; + } + + // support no starting clear code +@@ -5707,11 +6303,16 @@ static stbi_uc *stbi__process_gif_raster(stbi__context *s, stbi__gif *g) + stbi__skip(s,len); + return g->out; + } else if (code <= avail) { +- if (first) return stbi__errpuc("no clear code", "Corrupt GIF"); ++ if (first) { ++ return stbi__errpuc("no clear code", "Corrupt GIF"); ++ } + + if (oldcode >= 0) { + p = &g->codes[avail++]; +- if (avail > 4096) return stbi__errpuc("too many codes", "Corrupt GIF"); ++ if (avail > 8192) { ++ return stbi__errpuc("too many codes", "Corrupt GIF"); ++ } ++ + p->prefix = (stbi__int16) oldcode; + p->first = g->codes[oldcode].first; + p->suffix = (code == avail) ? p->first : g->codes[code].first; +@@ -5733,59 +6334,72 @@ static stbi_uc *stbi__process_gif_raster(stbi__context *s, stbi__gif *g) + } + } + +-static void stbi__fill_gif_background(stbi__gif *g, int x0, int y0, int x1, int y1) +-{ +- int x, y; +- stbi_uc *c = g->pal[g->bgindex]; +- for (y = y0; y < y1; y += 4 * g->w) { +- for (x = x0; x < x1; x += 4) { +- stbi_uc *p = &g->out[y + x]; +- p[0] = c[2]; +- p[1] = c[1]; +- p[2] = c[0]; +- p[3] = 0; +- } +- } +-} +- + // this function is designed to support animated gifs, although stb_image doesn't support it +-static stbi_uc *stbi__gif_load_next(stbi__context *s, stbi__gif *g, int *comp, int req_comp) +-{ +- int i; +- stbi_uc *prev_out = 0; +- +- if (g->out == 0 && !stbi__gif_header(s, g, comp,0)) +- return 0; // stbi__g_failure_reason set by stbi__gif_header ++// two back is the image from two frames ago, used for a very specific disposal format ++static stbi_uc *stbi__gif_load_next(stbi__context *s, stbi__gif *g, int *comp, int req_comp, stbi_uc *two_back) ++{ ++ int dispose; ++ int first_frame; ++ int pi; ++ int pcount; ++ ++ // on first frame, any non-written pixels get the background colour (non-transparent) ++ first_frame = 0; ++ if (g->out == 0) { ++ if (!stbi__gif_header(s, g, comp,0)) return 0; // stbi__g_failure_reason set by stbi__gif_header ++ g->out = (stbi_uc *) stbi__malloc(4 * g->w * g->h); ++ g->background = (stbi_uc *) stbi__malloc(4 * g->w * g->h); ++ g->history = (stbi_uc *) stbi__malloc(g->w * g->h); ++ if (g->out == 0) return stbi__errpuc("outofmem", "Out of memory"); ++ ++ // image is treated as "tranparent" at the start - ie, nothing overwrites the current background; ++ // background colour is only used for pixels that are not rendered first frame, after that "background" ++ // color refers to teh color that was there the previous frame. ++ memset( g->out, 0x00, 4 * g->w * g->h ); ++ memset( g->background, 0x00, 4 * g->w * g->h ); // state of the background (starts transparent) ++ memset( g->history, 0x00, g->w * g->h ); // pixels that were affected previous frame ++ first_frame = 1; ++ } else { ++ // second frame - how do we dispoase of the previous one? ++ dispose = (g->eflags & 0x1C) >> 2; ++ pcount = g->w * g->h; + +- prev_out = g->out; +- g->out = (stbi_uc *) stbi__malloc(4 * g->w * g->h); +- if (g->out == 0) return stbi__errpuc("outofmem", "Out of memory"); ++ if ((dispose == 3) && (two_back == 0)) { ++ dispose = 2; // if I don't have an image to revert back to, default to the old background ++ } + +- switch ((g->eflags & 0x1C) >> 2) { +- case 0: // unspecified (also always used on 1st frame) +- stbi__fill_gif_background(g, 0, 0, 4 * g->w, 4 * g->w * g->h); +- break; +- case 1: // do not dispose +- if (prev_out) memcpy(g->out, prev_out, 4 * g->w * g->h); +- g->old_out = prev_out; +- break; +- case 2: // dispose to background +- if (prev_out) memcpy(g->out, prev_out, 4 * g->w * g->h); +- stbi__fill_gif_background(g, g->start_x, g->start_y, g->max_x, g->max_y); +- break; +- case 3: // dispose to previous +- if (g->old_out) { +- for (i = g->start_y; i < g->max_y; i += 4 * g->w) +- memcpy(&g->out[i + g->start_x], &g->old_out[i + g->start_x], g->max_x - g->start_x); ++ if (dispose == 3) { // use previous graphic ++ for (pi = 0; pi < pcount; ++pi) { ++ if (g->history[pi]) { ++ memcpy( &g->out[pi * 4], &two_back[pi * 4], 4 ); ++ } + } +- break; ++ } else if (dispose == 2) { ++ // restore what was changed last frame to background before that frame; ++ for (pi = 0; pi < pcount; ++pi) { ++ if (g->history[pi]) { ++ memcpy( &g->out[pi * 4], &g->background[pi * 4], 4 ); ++ } ++ } ++ } else { ++ // This is a non-disposal case eithe way, so just ++ // leave the pixels as is, and they will become the new background ++ // 1: do not dispose ++ // 0: not specified. ++ } ++ ++ // background is what out is after the undoing of the previou frame; ++ memcpy( g->background, g->out, 4 * g->w * g->h ); + } + ++ // clear my history; ++ memset( g->history, 0x00, g->w * g->h ); // pixels that were affected previous frame ++ + for (;;) { +- switch (stbi__get8(s)) { ++ int tag = stbi__get8(s); ++ switch (tag) { + case 0x2C: /* Image Descriptor */ + { +- int prev_trans = -1; + stbi__int32 x, y, w, h; + stbi_uc *o; + +@@ -5818,19 +6432,24 @@ static stbi_uc *stbi__gif_load_next(stbi__context *s, stbi__gif *g, int *comp, i + stbi__gif_parse_colortable(s,g->lpal, 2 << (g->lflags & 7), g->eflags & 0x01 ? g->transparent : -1); + g->color_table = (stbi_uc *) g->lpal; + } else if (g->flags & 0x80) { +- if (g->transparent >= 0 && (g->eflags & 0x01)) { +- prev_trans = g->pal[g->transparent][3]; +- g->pal[g->transparent][3] = 0; +- } + g->color_table = (stbi_uc *) g->pal; + } else +- return stbi__errpuc("missing color table", "Corrupt GIF"); +- ++ return stbi__errpuc("missing color table", "Corrupt GIF"); ++ + o = stbi__process_gif_raster(s, g); + if (o == NULL) return NULL; + +- if (prev_trans != -1) +- g->pal[g->transparent][3] = prev_trans; ++ // if this was the first frame, ++ pcount = g->w * g->h; ++ if (first_frame && (g->bgindex > 0)) { ++ // if first frame, any pixel not drawn to gets the background color ++ for (pi = 0; pi < pcount; ++pi) { ++ if (g->history[pi] == 0) { ++ g->pal[g->bgindex][3] = 255; // just in case it was made transparent, undo that; It will be reset next frame if need be; ++ memcpy( &g->out[pi * 4], &g->pal[g->bgindex], 4 ); ++ } ++ } ++ } + + return o; + } +@@ -5838,19 +6457,35 @@ static stbi_uc *stbi__gif_load_next(stbi__context *s, stbi__gif *g, int *comp, i + case 0x21: // Comment Extension. + { + int len; +- if (stbi__get8(s) == 0xF9) { // Graphic Control Extension. ++ int ext = stbi__get8(s); ++ if (ext == 0xF9) { // Graphic Control Extension. + len = stbi__get8(s); + if (len == 4) { + g->eflags = stbi__get8(s); +- g->delay = stbi__get16le(s); +- g->transparent = stbi__get8(s); ++ g->delay = 10 * stbi__get16le(s); // delay - 1/100th of a second, saving as 1/1000ths. ++ ++ // unset old transparent ++ if (g->transparent >= 0) { ++ g->pal[g->transparent][3] = 255; ++ } ++ if (g->eflags & 0x01) { ++ g->transparent = stbi__get8(s); ++ if (g->transparent >= 0) { ++ g->pal[g->transparent][3] = 0; ++ } ++ } else { ++ // don't need transparent ++ stbi__skip(s, 1); ++ g->transparent = -1; ++ } + } else { + stbi__skip(s, len); + break; + } +- } +- while ((len = stbi__get8(s)) != 0) ++ } ++ while ((len = stbi__get8(s)) != 0) { + stbi__skip(s, len); ++ } + break; + } + +@@ -5863,22 +6498,89 @@ static stbi_uc *stbi__gif_load_next(stbi__context *s, stbi__gif *g, int *comp, i + } + } + +-static stbi_uc *stbi__gif_load(stbi__context *s, int *x, int *y, int *comp, int req_comp) ++static void *stbi__load_gif_main(stbi__context *s, int **delays, int *x, int *y, int *z, int *comp, int req_comp) ++{ ++ if (stbi__gif_test(s)) { ++ int layers = 0; ++ stbi_uc *u = 0; ++ stbi_uc *out = 0; ++ stbi_uc *two_back = 0; ++ stbi__gif g; ++ int stride; ++ memset(&g, 0, sizeof(g)); ++ if (delays) { ++ *delays = 0; ++ } ++ ++ do { ++ u = stbi__gif_load_next(s, &g, comp, req_comp, two_back); ++ if (u == (stbi_uc *) s) u = 0; // end of animated gif marker ++ ++ if (u) { ++ *x = g.w; ++ *y = g.h; ++ ++layers; ++ stride = g.w * g.h * 4; ++ ++ if (out) { ++ out = (stbi_uc*) STBI_REALLOC( out, layers * stride ); ++ if (delays) { ++ *delays = (int*) STBI_REALLOC( *delays, sizeof(int) * layers ); ++ } ++ } else { ++ out = (stbi_uc*)stbi__malloc( layers * stride ); ++ if (delays) { ++ *delays = (int*) stbi__malloc( layers * sizeof(int) ); ++ } ++ } ++ memcpy( out + ((layers - 1) * stride), u, stride ); ++ if (layers >= 2) { ++ two_back = out - 2 * stride; ++ } ++ ++ if (delays) { ++ (*delays)[layers - 1U] = g.delay; ++ } ++ } ++ } while (u != 0); ++ ++ // free temp buffer; ++ STBI_FREE(g.out); ++ STBI_FREE(g.history); ++ STBI_FREE(g.background); ++ ++ // do the final conversion after loading everything; ++ if (req_comp && req_comp != 4) ++ out = stbi__convert_format(out, 4, req_comp, layers * g.w, g.h); ++ ++ *z = layers; ++ return out; ++ } else { ++ return stbi__errpuc("not GIF", "Image was not as a gif type."); ++ } ++} ++ ++static void *stbi__gif_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) + { + stbi_uc *u = 0; + stbi__gif g; + memset(&g, 0, sizeof(g)); + +- u = stbi__gif_load_next(s, &g, comp, req_comp); ++ u = stbi__gif_load_next(s, &g, comp, req_comp, 0); + if (u == (stbi_uc *) s) u = 0; // end of animated gif marker + if (u) { + *x = g.w; + *y = g.h; ++ ++ // moved conversion to after successful load so that the same ++ // can be done for multiple frames. + if (req_comp && req_comp != 4) + u = stbi__convert_format(u, 4, req_comp, g.w, g.h); + } +- else if (g.out) +- STBI_FREE(g.out); ++ ++ // free buffers needed for multiple frame loading; ++ STBI_FREE(g.history); ++ STBI_FREE(g.background); + + return u; + } +@@ -5893,20 +6595,24 @@ static int stbi__gif_info(stbi__context *s, int *x, int *y, int *comp) + // Radiance RGBE HDR loader + // originally by Nicolas Schulz + #ifndef STBI_NO_HDR +-static int stbi__hdr_test_core(stbi__context *s) ++static int stbi__hdr_test_core(stbi__context *s, const char *signature) + { +- const char *signature = "#?RADIANCE\n"; + int i; + for (i=0; signature[i]; ++i) + if (stbi__get8(s) != signature[i]) +- return 0; ++ return 0; ++ stbi__rewind(s); + return 1; + } + + static int stbi__hdr_test(stbi__context* s) + { +- int r = stbi__hdr_test_core(s); ++ int r = stbi__hdr_test_core(s, "#?RADIANCE\n"); + stbi__rewind(s); ++ if(!r) { ++ r = stbi__hdr_test_core(s, "#?RGBE\n"); ++ stbi__rewind(s); ++ } + return r; + } + +@@ -5960,7 +6666,7 @@ static void stbi__hdr_convert(float *output, stbi_uc *input, int req_comp) + } + } + +-static float *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int req_comp) ++static float *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) + { + char buffer[STBI__HDR_BUFLEN]; + char *token; +@@ -5971,10 +6677,12 @@ static float *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int re + int len; + unsigned char count, value; + int i, j, k, c1,c2, z; +- ++ const char *headerToken; ++ STBI_NOTUSED(ri); + + // Check identifier +- if (strcmp(stbi__hdr_gettoken(s,buffer), "#?RADIANCE") != 0) ++ headerToken = stbi__hdr_gettoken(s,buffer); ++ if (strcmp(headerToken, "#?RADIANCE") != 0 && strcmp(headerToken, "#?RGBE") != 0) + return stbi__errpf("not HDR", "Corrupt HDR image"); + + // Parse header +@@ -6003,8 +6711,13 @@ static float *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int re + if (comp) *comp = 3; + if (req_comp == 0) req_comp = 3; + ++ if (!stbi__mad4sizes_valid(width, height, req_comp, sizeof(float), 0)) ++ return stbi__errpf("too large", "HDR image is too large"); ++ + // Read data +- hdr_data = (float *) stbi__malloc(height * width * req_comp * sizeof(float)); ++ hdr_data = (float *) stbi__malloc_mad4(width, height, req_comp, sizeof(float), 0); ++ if (!hdr_data) ++ return stbi__errpf("outofmem", "Out of memory"); + + // Load image data + // image data is stored as some number of sca +@@ -6043,20 +6756,29 @@ static float *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int re + len <<= 8; + len |= stbi__get8(s); + if (len != width) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("invalid decoded scanline length", "corrupt HDR"); } +- if (scanline == NULL) scanline = (stbi_uc *) stbi__malloc(width * 4); ++ if (scanline == NULL) { ++ scanline = (stbi_uc *) stbi__malloc_mad2(width, 4, 0); ++ if (!scanline) { ++ STBI_FREE(hdr_data); ++ return stbi__errpf("outofmem", "Out of memory"); ++ } ++ } + + for (k = 0; k < 4; ++k) { ++ int nleft; + i = 0; +- while (i < width) { ++ while ((nleft = width - i) > 0) { + count = stbi__get8(s); + if (count > 128) { + // Run + value = stbi__get8(s); + count -= 128; ++ if (count > nleft) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("corrupt", "bad RLE data in HDR"); } + for (z = 0; z < count; ++z) + scanline[i++ * 4 + k] = value; + } else { + // Dump ++ if (count > nleft) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("corrupt", "bad RLE data in HDR"); } + for (z = 0; z < count; ++z) + scanline[i++ * 4 + k] = stbi__get8(s); + } +@@ -6065,7 +6787,8 @@ static float *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int re + for (i=0; i < width; ++i) + stbi__hdr_convert(hdr_data+(j*width + i)*req_comp, scanline + i*4, req_comp); + } +- STBI_FREE(scanline); ++ if (scanline) ++ STBI_FREE(scanline); + } + + return hdr_data; +@@ -6076,8 +6799,13 @@ static int stbi__hdr_info(stbi__context *s, int *x, int *y, int *comp) + char buffer[STBI__HDR_BUFLEN]; + char *token; + int valid = 0; ++ int dummy; + +- if (strcmp(stbi__hdr_gettoken(s,buffer), "#?RADIANCE") != 0) { ++ if (!x) x = &dummy; ++ if (!y) y = &dummy; ++ if (!comp) comp = &dummy; ++ ++ if (stbi__hdr_test(s) == 0) { + stbi__rewind( s ); + return 0; + } +@@ -6114,64 +6842,60 @@ static int stbi__hdr_info(stbi__context *s, int *x, int *y, int *comp) + #ifndef STBI_NO_BMP + static int stbi__bmp_info(stbi__context *s, int *x, int *y, int *comp) + { +- int hsz; +- if (stbi__get8(s) != 'B' || stbi__get8(s) != 'M') { ++ void *p; ++ stbi__bmp_data info; ++ ++ info.all_a = 255; ++ p = stbi__bmp_parse_header(s, &info); ++ stbi__rewind( s ); ++ if (p == NULL) ++ return 0; ++ if (x) *x = s->img_x; ++ if (y) *y = s->img_y; ++ if (comp) *comp = info.ma ? 4 : 3; ++ return 1; ++} ++#endif ++ ++#ifndef STBI_NO_PSD ++static int stbi__psd_info(stbi__context *s, int *x, int *y, int *comp) ++{ ++ int channelCount, dummy, depth; ++ if (!x) x = &dummy; ++ if (!y) y = &dummy; ++ if (!comp) comp = &dummy; ++ if (stbi__get32be(s) != 0x38425053) { + stbi__rewind( s ); + return 0; + } +- stbi__skip(s,12); +- hsz = stbi__get32le(s); +- if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108 && hsz != 124) { ++ if (stbi__get16be(s) != 1) { + stbi__rewind( s ); + return 0; + } +- if (hsz == 12) { +- *x = stbi__get16le(s); +- *y = stbi__get16le(s); +- } else { +- *x = stbi__get32le(s); +- *y = stbi__get32le(s); +- } +- if (stbi__get16le(s) != 1) { ++ stbi__skip(s, 6); ++ channelCount = stbi__get16be(s); ++ if (channelCount < 0 || channelCount > 16) { + stbi__rewind( s ); + return 0; + } +- *comp = stbi__get16le(s) / 8; +- return 1; +-} +-#endif +- +-#ifndef STBI_NO_ICO +-static int stbi__ico_info(stbi__context *s, int *x, int *y, int *comp) +-{ +- unsigned r, n; +- r = stbi__get32le(s); +- n = stbi__get16le(s); +- if (n != 0x00010000 || n < 1 || n > 255 ) { ++ *y = stbi__get32be(s); ++ *x = stbi__get32be(s); ++ depth = stbi__get16be(s); ++ if (depth != 8 && depth != 16) { + stbi__rewind( s ); + return 0; + } +- *x = stbi__get8(s); +- *y = stbi__get8(s); +- if (!*x) *x = 256; +- if (!*y) *y = 256; +- +- r = stbi__get8(s); +- n = stbi__get16le(s); +- if (r != 0 || n > 1 ) { ++ if (stbi__get16be(s) != 3) { + stbi__rewind( s ); + return 0; + } +- n = stbi__get8(s); +- *comp = n ? n / 8 : 1; ++ *comp = 4; + return 1; + } +-#endif + +-#ifndef STBI_NO_PSD +-static int stbi__psd_info(stbi__context *s, int *x, int *y, int *comp) ++static int stbi__psd_is16(stbi__context *s) + { +- int channelCount; ++ int channelCount, depth; + if (stbi__get32be(s) != 0x38425053) { + stbi__rewind( s ); + return 0; +@@ -6186,17 +6910,13 @@ static int stbi__psd_info(stbi__context *s, int *x, int *y, int *comp) + stbi__rewind( s ); + return 0; + } +- *y = stbi__get32be(s); +- *x = stbi__get32be(s); +- if (stbi__get16be(s) != 8) { +- stbi__rewind( s ); +- return 0; +- } +- if (stbi__get16be(s) != 3) { ++ (void) stbi__get32be(s); ++ (void) stbi__get32be(s); ++ depth = stbi__get16be(s); ++ if (depth != 16) { + stbi__rewind( s ); + return 0; + } +- *comp = 4; + return 1; + } + #endif +@@ -6204,17 +6924,29 @@ static int stbi__psd_info(stbi__context *s, int *x, int *y, int *comp) + #ifndef STBI_NO_PIC + static int stbi__pic_info(stbi__context *s, int *x, int *y, int *comp) + { +- int act_comp=0,num_packets=0,chained; ++ int act_comp=0,num_packets=0,chained,dummy; + stbi__pic_packet packets[10]; + +- stbi__skip(s, 92); ++ if (!x) x = &dummy; ++ if (!y) y = &dummy; ++ if (!comp) comp = &dummy; ++ ++ if (!stbi__pic_is4(s,"\x53\x80\xF6\x34")) { ++ stbi__rewind(s); ++ return 0; ++ } ++ ++ stbi__skip(s, 88); + + *x = stbi__get16be(s); + *y = stbi__get16be(s); +- if (stbi__at_eof(s)) return 0; ++ if (stbi__at_eof(s)) { ++ stbi__rewind( s); ++ return 0; ++ } + if ( (*x) != 0 && (1 << 28) / (*x) < (*y)) { +- stbi__rewind( s ); +- return 0; ++ stbi__rewind( s ); ++ return 0; + } + + stbi__skip(s, 8); +@@ -6274,16 +7006,22 @@ static int stbi__pnm_test(stbi__context *s) + return 1; + } + +-static stbi_uc *stbi__pnm_load(stbi__context *s, int *x, int *y, int *comp, int req_comp) ++static void *stbi__pnm_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) + { + stbi_uc *out; ++ STBI_NOTUSED(ri); ++ + if (!stbi__pnm_info(s, (int *)&s->img_x, (int *)&s->img_y, (int *)&s->img_n)) + return 0; ++ + *x = s->img_x; + *y = s->img_y; +- *comp = s->img_n; ++ if (comp) *comp = s->img_n; ++ ++ if (!stbi__mad3sizes_valid(s->img_n, s->img_x, s->img_y, 0)) ++ return stbi__errpuc("too large", "PNM too large"); + +- out = (stbi_uc *) stbi__malloc(s->img_n * s->img_x * s->img_y); ++ out = (stbi_uc *) stbi__malloc_mad3(s->img_n, s->img_x, s->img_y, 0); + if (!out) return stbi__errpuc("outofmem", "Out of memory"); + stbi__getn(s, out, s->img_n * s->img_x * s->img_y); + +@@ -6301,8 +7039,16 @@ static int stbi__pnm_isspace(char c) + + static void stbi__pnm_skip_whitespace(stbi__context *s, char *c) + { +- while (!stbi__at_eof(s) && stbi__pnm_isspace(*c)) +- *c = (char) stbi__get8(s); ++ for (;;) { ++ while (!stbi__at_eof(s) && stbi__pnm_isspace(*c)) ++ *c = (char) stbi__get8(s); ++ ++ if (stbi__at_eof(s) || *c != '#') ++ break; ++ ++ while (!stbi__at_eof(s) && *c != '\n' && *c != '\r' ) ++ *c = (char) stbi__get8(s); ++ } + } + + static int stbi__pnm_isdigit(char c) +@@ -6324,16 +7070,20 @@ static int stbi__pnm_getinteger(stbi__context *s, char *c) + + static int stbi__pnm_info(stbi__context *s, int *x, int *y, int *comp) + { +- int maxv; ++ int maxv, dummy; + char c, p, t; + +- stbi__rewind( s ); ++ if (!x) x = &dummy; ++ if (!y) y = &dummy; ++ if (!comp) comp = &dummy; ++ ++ stbi__rewind(s); + + // Get identifier + p = (char) stbi__get8(s); + t = (char) stbi__get8(s); + if (p != 'P' || (t != '5' && t != '6')) { +- stbi__rewind( s ); ++ stbi__rewind(s); + return 0; + } + +@@ -6375,10 +7125,6 @@ static int stbi__info_main(stbi__context *s, int *x, int *y, int *comp) + if (stbi__bmp_info(s, x, y, comp)) return 1; + #endif + +- #ifndef STBI_NO_ICO +- if (stbi__ico_info(s, x, y, comp)) return 1; +- #endif +- + #ifndef STBI_NO_PSD + if (stbi__psd_info(s, x, y, comp)) return 1; + #endif +@@ -6403,6 +7149,19 @@ static int stbi__info_main(stbi__context *s, int *x, int *y, int *comp) + return stbi__err("unknown image type", "Image not of any known type, or corrupt"); + } + ++static int stbi__is_16_main(stbi__context *s) ++{ ++ #ifndef STBI_NO_PNG ++ if (stbi__png_is16(s)) return 1; ++ #endif ++ ++ #ifndef STBI_NO_PSD ++ if (stbi__psd_is16(s)) return 1; ++ #endif ++ ++ return 0; ++} ++ + #ifndef STBI_NO_STDIO + STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp) + { +@@ -6424,6 +7183,27 @@ STBIDEF int stbi_info_from_file(FILE *f, int *x, int *y, int *comp) + fseek(f,pos,SEEK_SET); + return r; + } ++ ++STBIDEF int stbi_is_16_bit(char const *filename) ++{ ++ FILE *f = stbi__fopen(filename, "rb"); ++ int result; ++ if (!f) return stbi__err("can't fopen", "Unable to open file"); ++ result = stbi_is_16_bit_from_file(f); ++ fclose(f); ++ return result; ++} ++ ++STBIDEF int stbi_is_16_bit_from_file(FILE *f) ++{ ++ int r; ++ stbi__context s; ++ long pos = ftell(f); ++ stbi__start_file(&s, f); ++ r = stbi__is_16_main(&s); ++ fseek(f,pos,SEEK_SET); ++ return r; ++} + #endif // !STBI_NO_STDIO + + STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp) +@@ -6440,10 +7220,63 @@ STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int + return stbi__info_main(&s,x,y,comp); + } + ++STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len) ++{ ++ stbi__context s; ++ stbi__start_mem(&s,buffer,len); ++ return stbi__is_16_main(&s); ++} ++ ++STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user) ++{ ++ stbi__context s; ++ stbi__start_callbacks(&s, (stbi_io_callbacks *) c, user); ++ return stbi__is_16_main(&s); ++} ++ + #endif // STB_IMAGE_IMPLEMENTATION + + /* + revision history: ++ 2.19 (2018-02-11) fix warning ++ 2.18 (2018-01-30) fix warnings ++ 2.17 (2018-01-29) change sbti__shiftsigned to avoid clang -O2 bug ++ 1-bit BMP ++ *_is_16_bit api ++ avoid warnings ++ 2.16 (2017-07-23) all functions have 16-bit variants; ++ STBI_NO_STDIO works again; ++ compilation fixes; ++ fix rounding in unpremultiply; ++ optimize vertical flip; ++ disable raw_len validation; ++ documentation fixes ++ 2.15 (2017-03-18) fix png-1,2,4 bug; now all Imagenet JPGs decode; ++ warning fixes; disable run-time SSE detection on gcc; ++ uniform handling of optional "return" values; ++ thread-safe initialization of zlib tables ++ 2.14 (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs ++ 2.13 (2016-11-29) add 16-bit API, only supported for PNG right now ++ 2.12 (2016-04-02) fix typo in 2.11 PSD fix that caused crashes ++ 2.11 (2016-04-02) allocate large structures on the stack ++ remove white matting for transparent PSD ++ fix reported channel count for PNG & BMP ++ re-enable SSE2 in non-gcc 64-bit ++ support RGB-formatted JPEG ++ read 16-bit PNGs (only as 8-bit) ++ 2.10 (2016-01-22) avoid warning introduced in 2.09 by STBI_REALLOC_SIZED ++ 2.09 (2016-01-16) allow comments in PNM files ++ 16-bit-per-pixel TGA (not bit-per-component) ++ info() for TGA could break due to .hdr handling ++ info() for BMP to shares code instead of sloppy parse ++ can use STBI_REALLOC_SIZED if allocator doesn't support realloc ++ code cleanup ++ 2.08 (2015-09-13) fix to 2.07 cleanup, reading RGB PSD as RGBA ++ 2.07 (2015-09-13) fix compiler warnings ++ partial animated GIF support ++ limited 16-bpc PSD support ++ #ifdef unused functions ++ bug with < 92 byte PIC,PNM,HDR,TGA + 2.06 (2015-04-19) fix bug where PSD returns wrong '*comp' value + 2.05 (2015-04-19) fix bug in progressive JPEG handling, fix warning + 2.04 (2015-04-15) try to re-enable SIMD on MinGW 64-bit +@@ -6584,3 +7417,46 @@ STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int + 0.50 (2006-11-19) + first released version + */ ++ ++ ++/* ++------------------------------------------------------------------------------ ++This software is available under 2 licenses -- choose whichever you prefer. ++------------------------------------------------------------------------------ ++ALTERNATIVE A - MIT License ++Copyright (c) 2017 Sean Barrett ++Permission is hereby granted, free of charge, to any person obtaining a copy of ++this software and associated documentation files (the "Software"), to deal in ++the Software without restriction, including without limitation the rights to ++use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies ++of the Software, and to permit persons to whom the Software is furnished to do ++so, subject to the following conditions: ++The above copyright notice and this permission notice shall be included in all ++copies or substantial portions of the Software. ++THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR ++IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, ++FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE ++AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER ++LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, ++OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE ++SOFTWARE. ++------------------------------------------------------------------------------ ++ALTERNATIVE B - Public Domain (www.unlicense.org) ++This is free and unencumbered software released into the public domain. ++Anyone is free to copy, modify, publish, use, compile, sell, or distribute this ++software, either in source code form or as a compiled binary, for any purpose, ++commercial or non-commercial, and by any means. ++In jurisdictions that recognize copyright laws, the author or authors of this ++software dedicate any and all copyright interest in the software to the public ++domain. We make this dedication for the benefit of the public at large and to ++the detriment of our heirs and successors. We intend this dedication to be an ++overt act of relinquishment in perpetuity of all present and future rights to ++this software under copyright law. ++THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR ++IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, ++FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE ++AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ++ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION ++WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ++------------------------------------------------------------------------------ ++*/ + +From 83f91409754b3316925196a21d6077c16859e9e5 Mon Sep 17 00:00:00 2001 +From: Tianxiao Gu +Date: Sun, 23 Sep 2018 01:51:08 -0700 +Subject: [PATCH 2/5] Merge patch of https://github.com/posva/catimg/pull/24 + +--- + src/stb_image.h | 222 ++++++++++++++++++++++++++++++++++++++---------- + 1 file changed, 179 insertions(+), 43 deletions(-) + +diff --git a/src/stb_image.h b/src/stb_image.h +index d9c21bc..358974d 100644 +--- src/stb_image.h ++++ src/stb_image.h +@@ -282,6 +282,7 @@ RECENT REVISION HISTORY: + // STBI_NO_GIF + // STBI_NO_HDR + // STBI_NO_PIC ++// STBI_NO_ICO + // STBI_NO_PNM (.ppm and .pgm) + // + // - You can request *only* certain decoders and suppress all other ones +@@ -296,6 +297,7 @@ RECENT REVISION HISTORY: + // STBI_ONLY_GIF + // STBI_ONLY_HDR + // STBI_ONLY_PIC ++// STBI_ONLY_ICO + // STBI_ONLY_PNM (.ppm and .pgm) + // + // - If you use STBI_NO_PNG (or _ONLY_ without PNG), and you still +@@ -471,7 +473,7 @@ STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const ch + #if defined(STBI_ONLY_JPEG) || defined(STBI_ONLY_PNG) || defined(STBI_ONLY_BMP) \ + || defined(STBI_ONLY_TGA) || defined(STBI_ONLY_GIF) || defined(STBI_ONLY_PSD) \ + || defined(STBI_ONLY_HDR) || defined(STBI_ONLY_PIC) || defined(STBI_ONLY_PNM) \ +- || defined(STBI_ONLY_ZLIB) ++ || defined(STBI_ONLY_ZLIB) || defined(STBI_ONLY_ICO) + #ifndef STBI_ONLY_JPEG + #define STBI_NO_JPEG + #endif +@@ -499,6 +501,9 @@ STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const ch + #ifndef STBI_ONLY_PNM + #define STBI_NO_PNM + #endif ++ #ifndef STBI_ONLY_ICO ++ #define STBI_NO_ICO ++ #endif + #endif + + #if defined(STBI_NO_PNG) && !defined(STBI_SUPPORT_ZLIB) && !defined(STBI_NO_ZLIB) +@@ -796,6 +801,13 @@ static int stbi__png_info(stbi__context *s, int *x, int *y, int *comp); + static int stbi__png_is16(stbi__context *s); + #endif + ++#ifndef STBI_NO_ICO ++static int stbi__ico_test(stbi__context *s); ++static void *stbi__ico_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); ++static int stbi__ico_info(stbi__context *s, int *x, int *y, int *comp); ++#endif ++ ++ + #ifndef STBI_NO_BMP + static int stbi__bmp_test(stbi__context *s); + static void *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); +@@ -997,6 +1009,9 @@ static void *stbi__load_main(stbi__context *s, int *x, int *y, int *comp, int re + #ifndef STBI_NO_PNM + if (stbi__pnm_test(s)) return stbi__pnm_load(s,x,y,comp,req_comp, ri); + #endif ++ #ifndef STBI_NO_ICO ++ if (stbi__ico_test(s)) return stbi__ico_load(s,x,y,comp,req_comp, ri); ++ #endif + + #ifndef STBI_NO_HDR + if (stbi__hdr_test(s)) { +@@ -4980,7 +4995,7 @@ static int stbi__png_is16(stbi__context *s) + + // Microsoft/Windows BMP image + +-#ifndef STBI_NO_BMP ++#if !defined(STBI_NO_BMP) && !defined(STBI_NO_ICO) + static int stbi__bmp_test_raw(stbi__context *s) + { + int r; +@@ -5056,17 +5071,9 @@ typedef struct + unsigned int mr,mg,mb,ma, all_a; + } stbi__bmp_data; + +-static void *stbi__bmp_parse_header(stbi__context *s, stbi__bmp_data *info) +-{ +- int hsz; +- if (stbi__get8(s) != 'B' || stbi__get8(s) != 'M') return stbi__errpuc("not BMP", "Corrupt BMP"); +- stbi__get32le(s); // discard filesize +- stbi__get16le(s); // discard reserved +- stbi__get16le(s); // discard reserved +- info->offset = stbi__get32le(s); +- info->hsz = hsz = stbi__get32le(s); +- info->mr = info->mg = info->mb = info->ma = 0; + ++static void *stbi__bmp_parse_header_cont(stbi__context *s, stbi__bmp_data *info) { ++ int hsz = info->hsz; + if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108 && hsz != 124) return stbi__errpuc("unknown BMP", "BMP type not supported: unknown"); + if (hsz == 12) { + s->img_x = stbi__get16le(s); +@@ -5139,36 +5146,47 @@ static void *stbi__bmp_parse_header(stbi__context *s, stbi__bmp_data *info) + return (void *) 1; + } + ++static void *stbi__bmp_parse_header(stbi__context *s, stbi__bmp_data *info) ++{ ++ int hsz; ++ if (stbi__get8(s) != 'B' || stbi__get8(s) != 'M') return stbi__errpuc("not BMP", "Corrupt BMP"); ++ stbi__get32le(s); // discard filesize ++ stbi__get16le(s); // discard reserved ++ stbi__get16le(s); // discard reserved ++ info->offset = stbi__get32le(s); ++ info->hsz = hsz = stbi__get32le(s); ++ info->mr = info->mg = info->mb = info->ma = 0; ++ ++ return stbi__bmp_parse_header_cont(s, info); ++} ++ + +-static void *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) ++ ++static void *stbi__bmp_load_cont(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__bmp_data *info, stbi__result_info *ri) + { + stbi_uc *out; + unsigned int mr=0,mg=0,mb=0,ma=0, all_a; + stbi_uc pal[256][4]; + int psize=0,i,j,width; + int flip_vertically, pad, target; +- stbi__bmp_data info; +- STBI_NOTUSED(ri); + +- info.all_a = 255; +- if (stbi__bmp_parse_header(s, &info) == NULL) +- return NULL; // error code already set ++ STBI_NOTUSED(ri); + + flip_vertically = ((int) s->img_y) > 0; + s->img_y = abs((int) s->img_y); + +- mr = info.mr; +- mg = info.mg; +- mb = info.mb; +- ma = info.ma; +- all_a = info.all_a; ++ mr = info->mr; ++ mg = info->mg; ++ mb = info->mb; ++ ma = info->ma; ++ all_a = info->all_a; + +- if (info.hsz == 12) { +- if (info.bpp < 24) +- psize = (info.offset - 14 - 24) / 3; ++ if (info->hsz == 12) { ++ if (info->bpp < 24) ++ psize = (info->offset - 14 - 24) / 3; + } else { +- if (info.bpp < 16) +- psize = (info.offset - 14 - info.hsz) >> 2; ++ if (info->bpp < 16) ++ psize = (info->offset - 14 - info->hsz) >> 2; + } + + s->img_n = ma ? 4 : 3; +@@ -5183,23 +5201,23 @@ static void *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req + + out = (stbi_uc *) stbi__malloc_mad3(target, s->img_x, s->img_y, 0); + if (!out) return stbi__errpuc("outofmem", "Out of memory"); +- if (info.bpp < 16) { ++ if (info->bpp < 16) { + int z=0; + if (psize == 0 || psize > 256) { STBI_FREE(out); return stbi__errpuc("invalid", "Corrupt BMP"); } + for (i=0; i < psize; ++i) { + pal[i][2] = stbi__get8(s); + pal[i][1] = stbi__get8(s); + pal[i][0] = stbi__get8(s); +- if (info.hsz != 12) stbi__get8(s); ++ if (info->hsz != 12) stbi__get8(s); + pal[i][3] = 255; + } +- stbi__skip(s, info.offset - 14 - info.hsz - psize * (info.hsz == 12 ? 3 : 4)); +- if (info.bpp == 1) width = (s->img_x + 7) >> 3; +- else if (info.bpp == 4) width = (s->img_x + 1) >> 1; +- else if (info.bpp == 8) width = s->img_x; ++ stbi__skip(s, info->offset - 14 - info->hsz - psize * (info->hsz == 12 ? 3 : 4)); ++ if (info->bpp == 1) width = (s->img_x + 7) >> 3; ++ else if (info->bpp == 4) width = (s->img_x + 1) >> 1; ++ else if (info->bpp == 8) width = s->img_x; + else { STBI_FREE(out); return stbi__errpuc("bad bpp", "Corrupt BMP"); } + pad = (-width)&3; +- if (info.bpp == 1) { ++ if (info->bpp == 1) { + for (j=0; j < (int) s->img_y; ++j) { + int bit_offset = 7, v = stbi__get8(s); + for (i=0; i < (int) s->img_x; ++i) { +@@ -5218,7 +5236,7 @@ static void *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req + for (j=0; j < (int) s->img_y; ++j) { + for (i=0; i < (int) s->img_x; i += 2) { + int v=stbi__get8(s),v2=0; +- if (info.bpp == 4) { ++ if (info->bpp == 4) { + v2 = v & 15; + v >>= 4; + } +@@ -5227,7 +5245,7 @@ static void *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req + out[z++] = pal[v][2]; + if (target == 4) out[z++] = 255; + if (i+1 == (int) s->img_x) break; +- v = (info.bpp == 8) ? stbi__get8(s) : v2; ++ v = (info->bpp == 8) ? stbi__get8(s) : v2; + out[z++] = pal[v][0]; + out[z++] = pal[v][1]; + out[z++] = pal[v][2]; +@@ -5240,14 +5258,14 @@ static void *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req + int rshift=0,gshift=0,bshift=0,ashift=0,rcount=0,gcount=0,bcount=0,acount=0; + int z = 0; + int easy=0; +- stbi__skip(s, info.offset - 14 - info.hsz); +- if (info.bpp == 24) width = 3 * s->img_x; +- else if (info.bpp == 16) width = 2*s->img_x; ++ stbi__skip(s, info->offset - 14 - info->hsz); ++ if (info->bpp == 24) width = 3 * s->img_x; ++ else if (info->bpp == 16) width = 2*s->img_x; + else /* bpp = 32 and pad = 0 */ width=0; + pad = (-width) & 3; +- if (info.bpp == 24) { ++ if (info->bpp == 24) { + easy = 1; +- } else if (info.bpp == 32) { ++ } else if (info->bpp == 32) { + if (mb == 0xff && mg == 0xff00 && mr == 0x00ff0000 && ma == 0xff000000) + easy = 2; + } +@@ -5272,7 +5290,7 @@ static void *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req + if (target == 4) out[z++] = a; + } + } else { +- int bpp = info.bpp; ++ int bpp = info->bpp; + for (i=0; i < (int) s->img_x; ++i) { + stbi__uint32 v = (bpp == 16 ? (stbi__uint32) stbi__get16le(s) : stbi__get32le(s)); + unsigned int a; +@@ -5314,6 +5332,120 @@ static void *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req + if (comp) *comp = s->img_n; + return out; + } ++ ++static void *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) ++{ ++ stbi__bmp_data info; ++ info.all_a = 255; ++ if (stbi__bmp_parse_header(s, &info) == NULL) ++ return NULL; // error code already set ++ ++ return stbi__bmp_load_cont(s, x, y, comp, req_comp, &info, ri); ++} ++#endif ++ ++ ++// Microsoft/Windows ICO image ++#ifndef STBI_NO_ICO ++static int stbi__ico_test_raw(stbi__context *s) ++{ ++ int bpp; ++ if (stbi__get8(s) != 0) return 0; ++ if (stbi__get8(s) != 0) return 0; ++ if (stbi__get8(s) != 1) return 0; ++ if (stbi__get8(s) != 0) return 0; ++ if (stbi__get8(s) == 0) return 0; // accept any "number of images" from 1 to 255, ++ if (stbi__get8(s) != 0) return 0; // so the MSB needs to be 0. ++ stbi__get8(s); // discard width ++ stbi__get8(s); // discard height ++ stbi__get8(s); // discard number of pallete entries ++ if (stbi__get8(s) != 0) return 0; ++ if (stbi__get8(s) > 1) return 0; ++ if (stbi__get8(s) != 0) return 0; ++ bpp = stbi__get8(s); // accept only common bit depths ++ if (bpp != 1 && bpp != 2 && bpp != 4 && bpp != 8 && bpp != 16 && bpp != 24 && bpp != 32) return 0; ++ if (stbi__get8(s) != 0) return 0; ++ return 1; ++} ++static int stbi__ico_test(stbi__context *s) ++{ ++ int r = stbi__ico_test_raw(s); ++ stbi__rewind(s); ++ return r; ++} ++static void *stbi__ico_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) ++{ ++ int n, planes, bpp, offset, hsz; ++ n = stbi__get32le(s); ++ if (n == 0x00020000) return stbi__errpuc("not ICO", "Unsupported CURsor file"); ++ if (n != 0x00010000) return stbi__errpuc("not ICO", "Corrupt ICO"); ++ n = stbi__get16le(s); ++ if (n < 0 || n > 255) return stbi__errpuc("not ICO", "Corrupt ICO"); ++ s->img_x = stbi__get8(s); ++ s->img_y = stbi__get8(s); ++ if (!s->img_x) s->img_x = 256; ++ if (!s->img_y) s->img_y = 256; ++ n = stbi__get16le(s); // number of pallete entries ++ if (n == 1) return stbi__errpuc("not ICO", "Corrupt ICO"); ++ planes = stbi__get16le(s); ++ if (planes > 1) return stbi__errpuc("not ICO", "Corrupt ICO"); ++ bpp = stbi__get16le(s); ++ if (bpp != 1 && bpp != 2 && bpp != 4 && bpp != 8 && bpp != 16 && bpp != 24 && bpp != 32) ++ return stbi__errpuc("not ICO", "Corrupt ICO"); ++ stbi__get32le(s); // discard size ++ offset = stbi__get32le(s); ++ stbi__skip(s, offset - 22); ++ hsz = stbi__get32le(s); ++ ++ if (hsz != 0x474e5089) { ++ stbi__bmp_data info; ++ info.all_a = 255; ++ info.offset = n * 4 + 14 + hsz; ++ info.hsz = hsz; ++ info.mr = info.mg = info.mb = info.ma = 0; ++ int true_y = s->img_y; // save before parse head ++ if (stbi__bmp_parse_header_cont(s, &info) == NULL) ++ return NULL; // error code already set ++ ++ s->img_y = true_y; ++ return stbi__bmp_load_cont(s, x, y, comp, req_comp, &info, ri); ++ } ++#ifndef STBI_NO_PNG ++ // Rewind and go to PNG start again ++ stbi__rewind(s); ++ stbi__skip(s, offset); ++ return stbi__png_load(s, x, y, comp, req_comp, ri); ++#else ++ return stbi__errpuc("PNG", "PNG support not compiled"); ++#endif ++} ++ ++ ++#endif ++ ++#ifndef STBI_NO_ICO ++static int stbi__ico_info(stbi__context *s, int *x, int *y, int *comp) ++{ ++ unsigned r, n; ++ r = stbi__get32le(s); ++ n = stbi__get16le(s); ++ if (n != 0x00010000 || n < 1 || n > 255 ) { ++ stbi__rewind( s ); ++ return 0; ++ } ++ *x = stbi__get8(s); ++ *y = stbi__get8(s); ++ if (!*x) *x = 256; ++ if (!*y) *y = 256; ++ r = stbi__get8(s); ++ n = stbi__get16le(s); ++ if (r != 0 || n > 1 ) { ++ stbi__rewind( s ); ++ return 0; ++ } ++ *comp = stbi__get8(s) / 8; ++ return 1; ++} + #endif + + // Targa Truevision - TGA +@@ -7125,6 +7257,10 @@ static int stbi__info_main(stbi__context *s, int *x, int *y, int *comp) + if (stbi__bmp_info(s, x, y, comp)) return 1; + #endif + ++ #ifndef STBI_NO_ICO ++ if (stbi__ico_info(s, x, y, comp)) return 1; ++ #endif ++ + #ifndef STBI_NO_PSD + if (stbi__psd_info(s, x, y, comp)) return 1; + #endif + +From 302fa0974057f6587d9e9a9ff43de0d9a8ed048d Mon Sep 17 00:00:00 2001 +From: Tianxiao Gu +Date: Sun, 23 Sep 2018 02:26:09 -0700 +Subject: [PATCH 3/5] Enable gif + +--- + src/sh_image.c | 20 +++++++++++++++++++- + 1 file changed, 19 insertions(+), 1 deletion(-) + +diff --git a/src/sh_image.c b/src/sh_image.c +index d69e96d..03e74ba 100644 +--- src/sh_image.c ++++ src/sh_image.c +@@ -19,12 +19,16 @@ STBIDEF unsigned char *stbi__xload_main(stbi__context *s, int *x, int *y, int *f + gif_result head; + gif_result *prev = 0, *gr = &head; + ++ stbi_uc *out = 0; ++ stbi_uc *two_back = 0; ++ int stride; ++ + memset(&g, 0, sizeof(g)); + memset(&head, 0, sizeof(head)); + + *frames = 0; + +- while ((gr->data = stbi__gif_load_next(s, &g, channels, 4, 0))) { ++ while ((gr->data = stbi__gif_load_next(s, &g, channels, 4, two_back))) { + if (gr->data == (unsigned char*)s) { + gr->data = 0; + break; +@@ -36,8 +40,22 @@ STBIDEF unsigned char *stbi__xload_main(stbi__context *s, int *x, int *y, int *f + gr = (gif_result*) stbi__malloc(sizeof(gif_result)); + memset(gr, 0, sizeof(gif_result)); + ++(*frames); ++ ++ stride = g.w * g.h * 4; ++ ++ if (out) { ++ out = (stbi_uc*) STBI_REALLOC( out, (*frames) * stride ); ++ } else { ++ out = (stbi_uc*)stbi__malloc( (*frames) * stride ); ++ } ++ ++ if (*frames >= 2) { ++ two_back = out - 2 * stride; ++ } + } + ++ STBI_FREE(out); ++ + if (gr != &head) + STBI_FREE(gr); + + +From 3fa8440b5812d5da39a160d9fa88b9465374e040 Mon Sep 17 00:00:00 2001 +From: Tianxiao Gu +Date: Sun, 30 Sep 2018 03:19:13 -0700 +Subject: [PATCH 4/5] Fix crashes on multi-frames gif + +--- + src/sh_image.c | 31 +++++++++++++------------------ + 1 file changed, 13 insertions(+), 18 deletions(-) + +diff --git a/src/sh_image.c b/src/sh_image.c +index 03e74ba..bd2f51c 100644 +--- src/sh_image.c ++++ src/sh_image.c +@@ -19,42 +19,37 @@ STBIDEF unsigned char *stbi__xload_main(stbi__context *s, int *x, int *y, int *f + gif_result head; + gif_result *prev = 0, *gr = &head; + +- stbi_uc *out = 0; +- stbi_uc *two_back = 0; +- int stride; +- ++ int stride = 0; ++ unsigned char* temp = 0; + memset(&g, 0, sizeof(g)); + memset(&head, 0, sizeof(head)); + + *frames = 0; + +- while ((gr->data = stbi__gif_load_next(s, &g, channels, 4, two_back))) { ++ while ((gr->data = stbi__gif_load_next(s, &g, channels, 4, 0))) { + if (gr->data == (unsigned char*)s) { + gr->data = 0; + break; + } + + if (prev) prev->next = gr; +- gr->delay = g.delay; ++ gr->delay = g.delay / 10; // the delay has been saved as 1/1000 s in the new stb_image.h + prev = gr; + gr = (gif_result*) stbi__malloc(sizeof(gif_result)); + memset(gr, 0, sizeof(gif_result)); + ++(*frames); + +- stride = g.w * g.h * 4; +- +- if (out) { +- out = (stbi_uc*) STBI_REALLOC( out, (*frames) * stride ); +- } else { +- out = (stbi_uc*)stbi__malloc( (*frames) * stride ); +- } +- +- if (*frames >= 2) { +- two_back = out - 2 * stride; ++ { ++ stride = 4 * g.w * g.h; ++ temp = prev->data; ++ prev->data = (unsigned char*)stbi__malloc(stride); ++ memcpy(prev->data, temp, stride); + } + } + +- STBI_FREE(out); ++ STBI_FREE(g.out); ++ STBI_FREE(g.history); ++ STBI_FREE(g.background); + + if (gr != &head) + STBI_FREE(gr); +@@ -161,7 +156,7 @@ void img_load_from_data(image_t *img, stbi_uc* ptr, int w, int h, int frames, in + exit(1); + } + +- if (frames > 1 && !(img->delays = malloc(sizeof(uint16_t) * (frames - 1)))) { ++ if (frames > 1 && !(img->delays = malloc(sizeof(uint16_t) * (frames)))) { // avoid buffer overflow + perror("malloc error\n"); + exit(1); + } + +From cddcdd9455b461943dcd56ef7403f1bdd9ade24b Mon Sep 17 00:00:00 2001 +From: Tianxiao Gu +Date: Sun, 30 Sep 2018 03:28:12 -0700 +Subject: [PATCH 5/5] Fix memory leak of delays + +--- + src/sh_image.c | 3 +++ + 1 file changed, 3 insertions(+) + +diff --git a/src/sh_image.c b/src/sh_image.c +index bd2f51c..525478b 100644 +--- src/sh_image.c ++++ src/sh_image.c +@@ -257,6 +257,9 @@ void img_convert_colors(image_t *img) + void img_free(image_t *img) + { + free(img->pixels); ++ if (img->delays) { ++ free(img->delays); ++ } + } + + void img_resize(image_t *img, float wsc, float hsc) + diff --git a/srcpkgs/catimg/template b/srcpkgs/catimg/template index 651e25b7b7..5762536cff 100644 --- a/srcpkgs/catimg/template +++ b/srcpkgs/catimg/template @@ -1,7 +1,7 @@ # Template file for 'catimg' pkgname=catimg version=2.4.0 -revision=1 +revision=2 build_style=cmake short_desc="Insanely fast image printing in your terminal" maintainer="Andrew Benson "