| | |
| | | /* stb_image - v2.06 - public domain image loader - http://nothings.org/stb_image.h |
| | | /* stb_image - v2.16 - public domain image loader - http://nothings.org/stb_image.h |
| | | no warranty implied; use at your own risk |
| | | |
| | | Do this: |
| | |
| | | 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) |
| | |
| | | Full documentation under "DOCUMENTATION" below. |
| | | |
| | | |
| | | Revision 2.00 release notes: |
| | | LICENSE |
| | | |
| | | - Progressive JPEG is now supported. |
| | | See end of file for license information. |
| | | |
| | | - PPM and PGM binary formats are now supported, thanks to Ken Miller. |
| | | RECENT REVISION HISTORY: |
| | | |
| | | - 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_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) |
| | | |
| | | 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 |
| | | 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 |
| | | 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) |
| | | Daniel Gibson (16-bit TGA) |
| | | socks-the-fox (16-bit PNG) |
| | | Jeremy Sawicki (handle all ImageNet JPGs) |
| | | Optimizations & bugfixes |
| | | Fabian "ryg" Giesen |
| | | Arseny Kapoulkine |
| | | John-Mark Allen |
| | | |
| | | 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. |
| | | |
| | | 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 Baldur Karlsson |
| | | Janez Zemva John Bartholomew Michal Cichon github:rlyeh |
| | | Jonathan Blow Ken Hamada Tero Hanninen github:romigrou |
| | | Laurent Gomila Cort Stratton Sergio Gonzalez github:svdijk |
| | | Aruelien Pocheville Thibault Reuille Cass Everitt github:snagar |
| | | Ryamond Barbiero Paul Du Bois Engin Manap github:Zelex |
| | | Michaelangel007@github Philipp Wiesemann Dale Weiler github:grim210 |
| | | Oriol Ferrer Mesia Josh Tobin Matthew Gregan github:sammyhw |
| | | Blazej Dariusz Roszkowski Gregory Mullen github:phprus |
| | | Christian Floisand Kevin Schmidt github:poppolopoppo |
| | | */ |
| | | |
| | | #ifndef STBI_INCLUDE_STB_IMAGE_H |
| | |
| | | // 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 *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 |
| | |
| | | // 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: |
| | |
| | | // 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. |
| | |
| | | // 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") |
| | | // |
| | | // =========================================================================== |
| | |
| | | // (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. |
| | |
| | | // 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 |
| | |
| | | |
| | | enum |
| | | { |
| | | STBI_default = 0, // only used for req_comp |
| | | STBI_default = 0, // only used for desired_channels |
| | | |
| | | STBI_grey = 1, |
| | | STBI_grey_alpha = 2, |
| | |
| | | }; |
| | | |
| | | typedef unsigned char stbi_uc; |
| | | typedef unsigned short stbi_us; |
| | | |
| | | #ifdef __cplusplus |
| | | extern "C" { |
| | |
| | | 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_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 |
| | | |
| | | #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); |
| | | //////////////////////////////////// |
| | | // |
| | | // 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 float *stbi_loadf_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); |
| | | 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_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 (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); |
| | |
| | | #include <stddef.h> // ptrdiff_t on osx |
| | | #include <stdlib.h> |
| | | #include <string.h> |
| | | #include <limits.h> |
| | | |
| | | #if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) |
| | | #include <math.h> // ldexp |
| | |
| | | #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_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 |
| | | #if defined(__x86_64__) || defined(_M_X64) |
| | | #define STBI__X64_TARGET |
| | |
| | | #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 |
| | | |
| | |
| | | #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 <emmintrin.h> |
| | | |
| | |
| | | |
| | | #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; |
| | |
| | | #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 |
| | |
| | | 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; |
| | | |
| | | |
| | |
| | | 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 |
| | |
| | | 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 |
| | |
| | | // 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_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); |
| | | #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 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 |
| | | |
| | |
| | | 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 |
| | | 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); |
| | | } |
| | | |
| | | // 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); |
| | | } |
| | | |
| | | 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); |
| | | } |
| | | |
| | | // stbi__err - error |
| | | // stbi__errpf - error returning pointer to float |
| | | // stbi__errpuc - error returning pointer to unsigned char |
| | |
| | | #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) |
| | | { |
| | |
| | | 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); |
| | | 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 |
| | |
| | | #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; |
| | | reduced = (stbi_uc *) stbi__malloc(img_len); |
| | | if (reduced == NULL) return stbi__errpuc("outofmem", "Out of memory"); |
| | | |
| | | // @OPTIMIZE: use a bigger temp buffer and memcpy multiple pixels at once |
| | | 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++) { |
| | | 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; |
| | | } |
| | | 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 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; |
| | | } |
| | | |
| | | #ifndef STBI_NO_HDR |
| | | 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 |
| | | |
| | |
| | | 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_LINEAR |
| | |
| | | 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"); |
| | |
| | | stbi__start_file(&s,f); |
| | | return stbi__hdr_test(&s); |
| | | #else |
| | | STBI_NOTUSED(f); |
| | | return 0; |
| | | #endif |
| | | } |
| | |
| | | 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; } |
| | | |
| | |
| | | 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 |
| | | |
| | |
| | | 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"); |
| | |
| | | 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 (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]=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 CASE |
| | | #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 (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 STBI__CASE |
| | | } |
| | | |
| | | STBI_FREE(data); |
| | |
| | | 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; |
| | |
| | | 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; |
| | |
| | | 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 |
| | |
| | | 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; |
| | |
| | | // 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)); |
| | |
| | | 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; |
| | |
| | | }; |
| | | |
| | | // decode one 64-entry block-- |
| | | static int stbi__jpeg_decode_block(stbi__jpeg *j, short data[64], stbi__huffman *hdc, stbi__huffman *hac, stbi__int16 *fac, int b, stbi_uc *dequant) |
| | | static int stbi__jpeg_decode_block(stbi__jpeg *j, short data[64], stbi__huffman *hdc, stbi__huffman *hac, stbi__int16 *fac, int b, stbi__uint16 *dequant) |
| | | { |
| | | int diff,dc,k; |
| | | int t; |
| | |
| | | x = stbi__get8(j->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; |
| | | } |
| | | |
| | |
| | | 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; |
| | |
| | | } |
| | | } |
| | | |
| | | 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) |
| | |
| | | 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; |
| | | |
| | |
| | | } |
| | | 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 |
| | |
| | | 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; |
| | |
| | | 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; |
| | |
| | | |
| | | 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 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"); |
| | |
| | | |
| | | 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; |
| | |
| | | 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; |
| | | |
| | |
| | | // 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"); |
| | | } |
| | | // 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); |
| | | 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; |
| | | 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); |
| | | if (z->progressive) { |
| | | // 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); |
| | | } |
| | | } |
| | | |
| | |
| | | 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"); |
| | |
| | | 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) stbi__err("bad DNL len", "Corrupt JPEG"); |
| | | if (NL != j->s->img_y) stbi__err("bad DNL height", "Corrupt JPEG"); |
| | | } else { |
| | | if (!stbi__process_marker(j, m)) return 0; |
| | | } |
| | |
| | | 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; |
| | |
| | | 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; |
| | |
| | | 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) |
| | |
| | | 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; |
| | |
| | | #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 |
| | | } |
| | |
| | | // 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 |
| | |
| | | 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 |
| | |
| | | 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; |
| | | |
| | | if (z->s->img_n == 3 && n < 3) |
| | | 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 && !is_rgb) |
| | | decode_n = 1; |
| | | else |
| | | decode_n = z->s->img_n; |
| | |
| | | } |
| | | |
| | | // 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 |
| | |
| | | if (n >= 3) { |
| | | stbi_uc *y = coutput[0]; |
| | | if (z->s->img_n == 3) { |
| | | 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]; |
| | |
| | | out += n; |
| | | } |
| | | } else { |
| | | 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]; |
| | |
| | | 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; |
| | | } |
| | | |
| | |
| | | } |
| | | 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 |
| | | |
| | |
| | | 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]; |
| | |
| | | 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]; |
| | |
| | | { |
| | | 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); |
| | | } |
| | |
| | | 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; |
| | |
| | | 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) { |
| | |
| | | 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) { |
| | | else { |
| | | stbi_uc fill = 0; |
| | | if (c == 16) { |
| | | c = stbi__zreceive(a,2)+3; |
| | | memset(lencodes+n, lencodes[n-1], c); |
| | | n += c; |
| | | } else if (c == 17) { |
| | | if (n == 0) return stbi__err("bad codelengths", "Corrupt PNG"); |
| | | fill = lencodes[n-1]; |
| | | } else if (c == 17) |
| | | c = stbi__zreceive(a,3)+3; |
| | | memset(lencodes+n, 0, c); |
| | | n += c; |
| | | } else { |
| | | else { |
| | | STBI_ASSERT(c == 18); |
| | | c = stbi__zreceive(a,7)+11; |
| | | memset(lencodes+n, 0, c); |
| | | } |
| | | 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; |
| | |
| | | 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; |
| | |
| | | |
| | | for (i=0; i <= 31; ++i) stbi__zdefault_distance[i] = 5; |
| | | } |
| | | */ |
| | | |
| | | 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 { |
| | |
| | | { |
| | | stbi__context *s; |
| | | stbi_uc *idata, *expanded, *out; |
| | | int depth; |
| | | } stbi__png; |
| | | |
| | | |
| | |
| | | // 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"); |
| | | |
| | | 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: |
| | | // 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"); |
| | | |
| | |
| | | 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]; |
| | |
| | | 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; |
| | |
| | | |
| | | // 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 CASE |
| | | #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; |
| | | } |
| | | } |
| | | } |
| | | } |
| | | |
| | |
| | | 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; |
| | |
| | | |
| | | 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 }; |
| | |
| | | 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); |
| | |
| | | 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 |
| | |
| | | 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; |
| | |
| | | { |
| | | 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; |
| | |
| | | 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"); |
| | |
| | | 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; |
| | | } |
| | |
| | | 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"); |
| | |
| | | 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 |
| | |
| | | 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__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) { |
| | |
| | | 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; |
| | |
| | | } |
| | | } |
| | | |
| | | 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; |
| | |
| | | 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) |
| | |
| | | return result; |
| | | } |
| | | |
| | | static stbi_uc *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp) |
| | | 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, offset, hsz; |
| | | 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 |
| | | offset = stbi__get32le(s); |
| | | hsz = stbi__get32le(s); |
| | | 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); |
| | |
| | | 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 (info->bpp == 1) return stbi__errpuc("monochrome", "BMP type not supported: 1-bit"); |
| | | 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 |
| | |
| | | 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"); |
| | | } |
| | |
| | | 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 |
| | |
| | | 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 |
| | | 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 == 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) { |
| | | if (info.bpp == 4) { |
| | | v2 = v & 15; |
| | | v >>= 4; |
| | | } |
| | |
| | | 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; |
| | | v = (info.bpp == 8) ? stbi__get8(s) : v2; |
| | | out[z++] = pal[v][0]; |
| | | out[z++] = pal[v][1]; |
| | | out[z++] = pal[v][2]; |
| | |
| | | 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; |
| | | } |
| | |
| | | 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; |
| | |
| | | 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) { |
| | |
| | | // 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; |
| | | // else: fall-through |
| | | case 15: if(is_rgb16) *is_rgb16 = 1; |
| | | return STBI_rgb; |
| | | case 24: // fall-through |
| | | 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); |
| | |
| | | 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)) { |
| | | 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 = sz; |
| | | 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; |
| | | } |
| | | 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); |
| | |
| | | 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 ) |
| | |
| | | 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 { |
| | |
| | | // 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 )) { |
| | | 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 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 ) |
| | | { |
| | | // 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); |
| | | } |
| | | } |
| | |
| | | } |
| | | } |
| | | |
| | | // 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) |
| | |
| | | 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 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" |
| | |
| | | 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: |
| | |
| | | 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. |
| | | |
| | | 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; |
| | | |
| | |
| | | *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 { |
| | | // Read the data. |
| | | stbi_uc *p = out+channel; |
| | | stbi_uc val = channel == 3 ? 255 : 0; |
| | | for (i = 0; i < pixelCount; i++, p += 4) |
| | | *p = val; |
| | | } |
| | | } else { |
| | | 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) { |
| | | 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 |
| | | } |
| | |
| | | |
| | | if (count >= 128) { // Repeated |
| | | stbi_uc value[4]; |
| | | int i; |
| | | |
| | | if (count==128) |
| | | count = stbi__get16be(s); |
| | |
| | | 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); |
| | |
| | | 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)) { |
| | |
| | | typedef struct |
| | | { |
| | | int w,h; |
| | | stbi_uc *out; // output buffer (always 4 components) |
| | | int flags, bgindex, ratio, transparent, eflags; |
| | | stbi_uc *out, *old_out; // output buffer (always 4 components) |
| | | int flags, bgindex, ratio, transparent, eflags, delay; |
| | | stbi_uc pal[256][4]; |
| | | stbi_uc lpal[256][4]; |
| | | stbi__gif_lzw codes[4096]; |
| | |
| | | |
| | | 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 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; |
| | |
| | | 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 |
| | |
| | | } |
| | | } |
| | | |
| | | static void stbi__fill_gif_background(stbi__gif *g) |
| | | static void stbi__fill_gif_background(stbi__gif *g, int x0, int y0, int x1, int y1) |
| | | { |
| | | int i; |
| | | int x, y; |
| | | stbi_uc *c = g->pal[g->bgindex]; |
| | | // @OPTIMIZE: write a dword at a time |
| | | for (i = 0; i < g->w * g->h * 4; i += 4) { |
| | | stbi_uc *p = &g->out[i]; |
| | | 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] = c[3]; |
| | | p[3] = 0; |
| | | } |
| | | } |
| | | } |
| | | |
| | |
| | | static stbi_uc *stbi__gif_load_next(stbi__context *s, stbi__gif *g, int *comp, int req_comp) |
| | | { |
| | | int i; |
| | | stbi_uc *old_out = 0; |
| | | stbi_uc *prev_out = 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); |
| | | if (g->out == 0 && !stbi__gif_header(s, g, comp,0)) |
| | | return 0; // stbi__g_failure_reason set by stbi__gif_header |
| | | |
| | | if (!stbi__mad3sizes_valid(g->w, g->h, 4, 0)) |
| | | return stbi__errpuc("too large", "GIF too large"); |
| | | |
| | | prev_out = g->out; |
| | | g->out = (stbi_uc *) stbi__malloc_mad3(4, g->w, g->h, 0); |
| | | if (g->out == 0) return stbi__errpuc("outofmem", "Out of memory"); |
| | | stbi__fill_gif_background(g); |
| | | } else { |
| | | // animated-gif-only path |
| | | if (((g->eflags & 0x1C) >> 2) == 3) { |
| | | old_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"); |
| | | memcpy(g->out, old_out, g->w*g->h*4); |
| | | |
| | | 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); |
| | | } |
| | | break; |
| | | } |
| | | |
| | | for (;;) { |
| | | switch (stbi__get8(s)) { |
| | | case 0x2C: /* Image Descriptor */ |
| | | { |
| | | int prev_trans = -1; |
| | | stbi__int32 x, y, w, h; |
| | | stbi_uc *o; |
| | | |
| | |
| | | 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) { |
| | | for (i=0; i < 256; ++i) // @OPTIMIZE: stbi__jpeg_reset only the previous transparent |
| | | g->pal[i][3] = 255; |
| | | if (g->transparent >= 0 && (g->eflags & 0x01)) |
| | | 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"); |
| | |
| | | o = stbi__process_gif_raster(s, g); |
| | | if (o == NULL) return NULL; |
| | | |
| | | if (req_comp && req_comp != 4) |
| | | o = stbi__convert_format(o, 4, req_comp, g->w, g->h); |
| | | if (prev_trans != -1) |
| | | g->pal[g->transparent][3] = (stbi_uc) prev_trans; |
| | | |
| | | return o; |
| | | } |
| | | |
| | |
| | | len = stbi__get8(s); |
| | | if (len == 4) { |
| | | g->eflags = stbi__get8(s); |
| | | stbi__get16le(s); // delay |
| | | g->delay = stbi__get16le(s); |
| | | g->transparent = stbi__get8(s); |
| | | } else { |
| | | stbi__skip(s, len); |
| | |
| | | return stbi__errpuc("unknown code", "Corrupt GIF"); |
| | | } |
| | | } |
| | | |
| | | STBI_NOTUSED(req_comp); |
| | | } |
| | | |
| | | 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) |
| | | { |
| | | stbi_uc *u = 0; |
| | | stbi__gif g; |
| | | memset(&g, 0, sizeof(g)); |
| | | stbi__gif* g = (stbi__gif*) stbi__malloc(sizeof(stbi__gif)); |
| | | memset(g, 0, sizeof(*g)); |
| | | STBI_NOTUSED(ri); |
| | | |
| | | u = stbi__gif_load_next(s, &g, comp, req_comp); |
| | | u = stbi__gif_load_next(s, g, comp, req_comp); |
| | | if (u == (stbi_uc *) s) u = 0; // end of animated gif marker |
| | | if (u) { |
| | | *x = g.w; |
| | | *y = g.h; |
| | | *x = g->w; |
| | | *y = g->h; |
| | | 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); |
| | | STBI_FREE(g); |
| | | return u; |
| | | } |
| | | |
| | |
| | | // 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; |
| | | 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; |
| | | } |
| | | |
| | |
| | | } |
| | | } |
| | | |
| | | 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; |
| | |
| | | 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 |
| | |
| | | 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 |
| | |
| | | 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); |
| | | } |
| | |
| | | for (i=0; i < width; ++i) |
| | | stbi__hdr_convert(hdr_data+(j*width + i)*req_comp, scanline + i*4, req_comp); |
| | | } |
| | | if (scanline) |
| | | STBI_FREE(scanline); |
| | | } |
| | | |
| | |
| | | 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; |
| | | } |
| | |
| | | #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; |
| | | } |
| | | stbi__skip(s,12); |
| | | hsz = stbi__get32le(s); |
| | | if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108 && hsz != 124) { |
| | | 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__rewind( s ); |
| | | return 0; |
| | | } |
| | | *comp = stbi__get16le(s) / 8; |
| | | 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; |
| | | int channelCount, dummy; |
| | | if (!x) x = &dummy; |
| | | if (!y) y = &dummy; |
| | | if (!comp) comp = &dummy; |
| | | if (stbi__get32be(s) != 0x38425053) { |
| | | stbi__rewind( s ); |
| | | return 0; |
| | |
| | | #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; |
| | |
| | | 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; |
| | | |
| | | out = (stbi_uc *) stbi__malloc(s->img_n * s->img_x * s->img_y); |
| | | 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_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); |
| | | |
| | |
| | | |
| | | static void stbi__pnm_skip_whitespace(stbi__context *s, char *c) |
| | | { |
| | | 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) |
| | |
| | | |
| | | static int stbi__pnm_info(stbi__context *s, int *x, int *y, int *comp) |
| | | { |
| | | int maxv; |
| | | int maxv, dummy; |
| | | char c, p, t; |
| | | |
| | | if (!x) x = &dummy; |
| | | if (!y) y = &dummy; |
| | | if (!comp) comp = &dummy; |
| | | |
| | | stbi__rewind( s ); |
| | | |
| | | // Get identifier |
| | |
| | | |
| | | /* |
| | | revision history: |
| | | 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 |
| | |
| | | 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. |
| | | ------------------------------------------------------------------------------ |
| | | */ |
| | |
| | | /* stb_image_write - v0.98 - public domain - http://nothings.org/stb/stb_image_write.h |
| | | writes out PNG/BMP/TGA images to C stdio - Sean Barrett 2010 |
| | | /* stb_image_write - v1.07 - public domain - http://nothings.org/stb/stb_image_write.h |
| | | writes out PNG/BMP/TGA/JPEG/HDR images to C stdio - Sean Barrett 2010-2015 |
| | | no warranty implied; use at your own risk |
| | | |
| | | |
| | | Before #including, |
| | | |
| | | #define STB_IMAGE_WRITE_IMPLEMENTATION |
| | |
| | | |
| | | The PNG output is not optimal; it is 20-50% larger than the file |
| | | written by a decent optimizing implementation. This library is designed |
| | | for source code compactness and simplicitly, not optimal image file size |
| | | for source code compactness and simplicity, not optimal image file size |
| | | or run-time performance. |
| | | |
| | | BUILDING: |
| | |
| | | int stbi_write_png(char const *filename, int w, int h, int comp, const void *data, int stride_in_bytes); |
| | | int stbi_write_bmp(char const *filename, int w, int h, int comp, const void *data); |
| | | int stbi_write_tga(char const *filename, int w, int h, int comp, const void *data); |
| | | int stbi_write_hdr(char const *filename, int w, int h, int comp, const void *data); |
| | | int stbi_write_hdr(char const *filename, int w, int h, int comp, const float *data); |
| | | int stbi_write_jpg(char const *filename, int w, int h, int comp, const float *data); |
| | | |
| | | There are also four equivalent functions that use an arbitrary write function. You are |
| | | expected to open/close your file-equivalent before and after calling these: |
| | | |
| | | int stbi_write_png_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data, int stride_in_bytes); |
| | | int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data); |
| | | int stbi_write_tga_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data); |
| | | int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const float *data); |
| | | int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality); |
| | | |
| | | where the callback is: |
| | | void stbi_write_func(void *context, void *data, int size); |
| | | |
| | | You can define STBI_WRITE_NO_STDIO to disable the file variant of these |
| | | functions, so the library will not use stdio.h at all. However, this will |
| | | also disable HDR writing, because it requires stdio for formatted output. |
| | | |
| | | Each function returns 0 on failure and non-0 on success. |
| | | |
| | |
| | | data, alpha (if provided) is discarded, and for monochrome data it is |
| | | replicated across all three channels. |
| | | |
| | | TGA supports RLE or non-RLE compressed data. To use non-RLE-compressed |
| | | data, set the global variable 'stbi_write_tga_with_rle' to 0. |
| | | |
| | | JPEG does ignore alpha channels in input data; quality is between 1 and 100. |
| | | Higher quality looks better but results in a bigger image. |
| | | JPEG baseline (no JPEG progressive). |
| | | |
| | | CREDITS: |
| | | |
| | | PNG/BMP/TGA |
| | |
| | | Jean-Sebastien Guay |
| | | misc enhancements: |
| | | Tim Kelsey |
| | | TGA RLE |
| | | Alan Hickman |
| | | initial file IO callback implementation |
| | | Emmanuel Julien |
| | | JPEG |
| | | Jon Olick (original jo_jpeg.cpp code) |
| | | Daniel Gibson |
| | | bugfixes: |
| | | github:Chribba |
| | | Guillaume Chereau |
| | | github:jry2 |
| | | github:romigrou |
| | | Sergio Gonzalez |
| | | Jonas Karlsson |
| | | Filip Wasil |
| | | Thatcher Ulrich |
| | | github:poppolopoppo |
| | | Patrick Boettcher |
| | | |
| | | LICENSE |
| | | |
| | | See end of file for license information. |
| | | |
| | | */ |
| | | |
| | | #ifndef INCLUDE_STB_IMAGE_WRITE_H |
| | |
| | | extern "C" { |
| | | #endif |
| | | |
| | | extern int stbi_write_png(char const *filename, int w, int h, int comp, const void *data, int stride_in_bytes); |
| | | extern int stbi_write_bmp(char const *filename, int w, int h, int comp, const void *data); |
| | | extern int stbi_write_tga(char const *filename, int w, int h, int comp, const void *data); |
| | | extern int stbi_write_hdr(char const *filename, int w, int h, int comp, const float *data); |
| | | #ifdef STB_IMAGE_WRITE_STATIC |
| | | #define STBIWDEF static |
| | | #else |
| | | #define STBIWDEF extern |
| | | extern int stbi_write_tga_with_rle; |
| | | #endif |
| | | |
| | | #ifndef STBI_WRITE_NO_STDIO |
| | | STBIWDEF int stbi_write_png(char const *filename, int w, int h, int comp, const void *data, int stride_in_bytes); |
| | | STBIWDEF int stbi_write_bmp(char const *filename, int w, int h, int comp, const void *data); |
| | | STBIWDEF int stbi_write_tga(char const *filename, int w, int h, int comp, const void *data); |
| | | STBIWDEF int stbi_write_hdr(char const *filename, int w, int h, int comp, const float *data); |
| | | STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality); |
| | | #endif |
| | | |
| | | typedef void stbi_write_func(void *context, void *data, int size); |
| | | |
| | | STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data, int stride_in_bytes); |
| | | STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data); |
| | | STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data); |
| | | STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const float *data); |
| | | STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality); |
| | | |
| | | #ifdef __cplusplus |
| | | } |
| | |
| | | |
| | | #ifdef STB_IMAGE_WRITE_IMPLEMENTATION |
| | | |
| | | #ifdef _WIN32 |
| | | #ifndef _CRT_SECURE_NO_WARNINGS |
| | | #define _CRT_SECURE_NO_WARNINGS |
| | | #endif |
| | | #ifndef _CRT_NONSTDC_NO_DEPRECATE |
| | | #define _CRT_NONSTDC_NO_DEPRECATE |
| | | #endif |
| | | #endif |
| | | |
| | | #ifndef STBI_WRITE_NO_STDIO |
| | | #include <stdio.h> |
| | | #endif // STBI_WRITE_NO_STDIO |
| | | |
| | | #include <stdarg.h> |
| | | #include <stdlib.h> |
| | | #include <stdio.h> |
| | | #include <string.h> |
| | | #include <math.h> |
| | | |
| | | #if defined(STBIW_MALLOC) && defined(STBIW_FREE) && defined(STBIW_REALLOC) |
| | | #if defined(STBIW_MALLOC) && defined(STBIW_FREE) && (defined(STBIW_REALLOC) || defined(STBIW_REALLOC_SIZED)) |
| | | // ok |
| | | #elif !defined(STBIW_MALLOC) && !defined(STBIW_FREE) && !defined(STBIW_REALLOC) |
| | | #elif !defined(STBIW_MALLOC) && !defined(STBIW_FREE) && !defined(STBIW_REALLOC) && !defined(STBIW_REALLOC_SIZED) |
| | | // ok |
| | | #else |
| | | #error "Must define all or none of STBIW_MALLOC, STBIW_FREE, and STBIW_REALLOC." |
| | | #error "Must define all or none of STBIW_MALLOC, STBIW_FREE, and STBIW_REALLOC (or STBIW_REALLOC_SIZED)." |
| | | #endif |
| | | |
| | | #ifndef STBIW_MALLOC |
| | | #define STBIW_MALLOC(sz) malloc(sz) |
| | | #define STBIW_REALLOC(p,sz) realloc(p,sz) |
| | | #define STBIW_REALLOC(p,newsz) realloc(p,newsz) |
| | | #define STBIW_FREE(p) free(p) |
| | | #endif |
| | | |
| | | #ifndef STBIW_REALLOC_SIZED |
| | | #define STBIW_REALLOC_SIZED(p,oldsz,newsz) STBIW_REALLOC(p,newsz) |
| | | #endif |
| | | |
| | | |
| | | #ifndef STBIW_MEMMOVE |
| | | #define STBIW_MEMMOVE(a,b,sz) memmove(a,b,sz) |
| | | #endif |
| | |
| | | #define STBIW_ASSERT(x) assert(x) |
| | | #endif |
| | | |
| | | #define STBIW_UCHAR(x) (unsigned char) ((x) & 0xff) |
| | | |
| | | typedef struct |
| | | { |
| | | stbi_write_func *func; |
| | | void *context; |
| | | } stbi__write_context; |
| | | |
| | | // initialize a callback-based context |
| | | static void stbi__start_write_callbacks(stbi__write_context *s, stbi_write_func *c, void *context) |
| | | { |
| | | s->func = c; |
| | | s->context = context; |
| | | } |
| | | |
| | | #ifndef STBI_WRITE_NO_STDIO |
| | | |
| | | static void stbi__stdio_write(void *context, void *data, int size) |
| | | { |
| | | fwrite(data,1,size,(FILE*) context); |
| | | } |
| | | |
| | | static int stbi__start_write_file(stbi__write_context *s, const char *filename) |
| | | { |
| | | FILE *f = fopen(filename, "wb"); |
| | | stbi__start_write_callbacks(s, stbi__stdio_write, (void *) f); |
| | | return f != NULL; |
| | | } |
| | | |
| | | static void stbi__end_write_file(stbi__write_context *s) |
| | | { |
| | | fclose((FILE *)s->context); |
| | | } |
| | | |
| | | #endif // !STBI_WRITE_NO_STDIO |
| | | |
| | | typedef unsigned int stbiw_uint32; |
| | | typedef int stb_image_write_test[sizeof(stbiw_uint32)==4 ? 1 : -1]; |
| | | |
| | | static void writefv(FILE *f, const char *fmt, va_list v) |
| | | #ifdef STB_IMAGE_WRITE_STATIC |
| | | static int stbi_write_tga_with_rle = 1; |
| | | #else |
| | | int stbi_write_tga_with_rle = 1; |
| | | #endif |
| | | |
| | | static void stbiw__writefv(stbi__write_context *s, const char *fmt, va_list v) |
| | | { |
| | | while (*fmt) { |
| | | switch (*fmt++) { |
| | | case ' ': break; |
| | | case '1': { unsigned char x = (unsigned char) va_arg(v, int); fputc(x,f); break; } |
| | | case '2': { int x = va_arg(v,int); unsigned char b[2]; |
| | | b[0] = (unsigned char) x; b[1] = (unsigned char) (x>>8); |
| | | fwrite(b,2,1,f); break; } |
| | | case '4': { stbiw_uint32 x = va_arg(v,int); unsigned char b[4]; |
| | | b[0]=(unsigned char)x; b[1]=(unsigned char)(x>>8); |
| | | b[2]=(unsigned char)(x>>16); b[3]=(unsigned char)(x>>24); |
| | | fwrite(b,4,1,f); break; } |
| | | case '1': { unsigned char x = STBIW_UCHAR(va_arg(v, int)); |
| | | s->func(s->context,&x,1); |
| | | break; } |
| | | case '2': { int x = va_arg(v,int); |
| | | unsigned char b[2]; |
| | | b[0] = STBIW_UCHAR(x); |
| | | b[1] = STBIW_UCHAR(x>>8); |
| | | s->func(s->context,b,2); |
| | | break; } |
| | | case '4': { stbiw_uint32 x = va_arg(v,int); |
| | | unsigned char b[4]; |
| | | b[0]=STBIW_UCHAR(x); |
| | | b[1]=STBIW_UCHAR(x>>8); |
| | | b[2]=STBIW_UCHAR(x>>16); |
| | | b[3]=STBIW_UCHAR(x>>24); |
| | | s->func(s->context,b,4); |
| | | break; } |
| | | default: |
| | | STBIW_ASSERT(0); |
| | | return; |
| | |
| | | } |
| | | } |
| | | |
| | | static void write3(FILE *f, unsigned char a, unsigned char b, unsigned char c) |
| | | static void stbiw__writef(stbi__write_context *s, const char *fmt, ...) |
| | | { |
| | | va_list v; |
| | | va_start(v, fmt); |
| | | stbiw__writefv(s, fmt, v); |
| | | va_end(v); |
| | | } |
| | | |
| | | static void stbiw__putc(stbi__write_context *s, unsigned char c) |
| | | { |
| | | s->func(s->context, &c, 1); |
| | | } |
| | | |
| | | static void stbiw__write3(stbi__write_context *s, unsigned char a, unsigned char b, unsigned char c) |
| | | { |
| | | unsigned char arr[3]; |
| | | arr[0] = a, arr[1] = b, arr[2] = c; |
| | | fwrite(arr, 3, 1, f); |
| | | s->func(s->context, arr, 3); |
| | | } |
| | | |
| | | static void write_pixels(FILE *f, int rgb_dir, int vdir, int x, int y, int comp, void *data, int write_alpha, int scanline_pad, int expand_mono) |
| | | static void stbiw__write_pixel(stbi__write_context *s, int rgb_dir, int comp, int write_alpha, int expand_mono, unsigned char *d) |
| | | { |
| | | unsigned char bg[3] = { 255, 0, 255}, px[3]; |
| | | int k; |
| | | |
| | | if (write_alpha < 0) |
| | | s->func(s->context, &d[comp - 1], 1); |
| | | |
| | | switch (comp) { |
| | | case 2: // 2 pixels = mono + alpha, alpha is written separately, so same as 1-channel case |
| | | case 1: |
| | | if (expand_mono) |
| | | stbiw__write3(s, d[0], d[0], d[0]); // monochrome bmp |
| | | else |
| | | s->func(s->context, d, 1); // monochrome TGA |
| | | break; |
| | | case 4: |
| | | if (!write_alpha) { |
| | | // composite against pink background |
| | | for (k = 0; k < 3; ++k) |
| | | px[k] = bg[k] + ((d[k] - bg[k]) * d[3]) / 255; |
| | | stbiw__write3(s, px[1 - rgb_dir], px[1], px[1 + rgb_dir]); |
| | | break; |
| | | } |
| | | /* FALLTHROUGH */ |
| | | case 3: |
| | | stbiw__write3(s, d[1 - rgb_dir], d[1], d[1 + rgb_dir]); |
| | | break; |
| | | } |
| | | if (write_alpha > 0) |
| | | s->func(s->context, &d[comp - 1], 1); |
| | | } |
| | | |
| | | static void stbiw__write_pixels(stbi__write_context *s, int rgb_dir, int vdir, int x, int y, int comp, void *data, int write_alpha, int scanline_pad, int expand_mono) |
| | | { |
| | | stbiw_uint32 zero = 0; |
| | | int i,j,k, j_end; |
| | | int i,j, j_end; |
| | | |
| | | if (y <= 0) |
| | | return; |
| | |
| | | for (; j != j_end; j += vdir) { |
| | | for (i=0; i < x; ++i) { |
| | | unsigned char *d = (unsigned char *) data + (j*x+i)*comp; |
| | | if (write_alpha < 0) |
| | | fwrite(&d[comp-1], 1, 1, f); |
| | | switch (comp) { |
| | | case 1: fwrite(d, 1, 1, f); |
| | | break; |
| | | case 2: if (expand_mono) |
| | | write3(f, d[0],d[0],d[0]); // monochrome bmp |
| | | else |
| | | fwrite(d, 1, 1, f); // monochrome TGA |
| | | break; |
| | | case 4: |
| | | if (!write_alpha) { |
| | | // composite against pink background |
| | | for (k=0; k < 3; ++k) |
| | | px[k] = bg[k] + ((d[k] - bg[k]) * d[3])/255; |
| | | write3(f, px[1-rgb_dir],px[1],px[1+rgb_dir]); |
| | | break; |
| | | stbiw__write_pixel(s, rgb_dir, comp, write_alpha, expand_mono, d); |
| | | } |
| | | /* FALLTHROUGH */ |
| | | case 3: |
| | | write3(f, d[1-rgb_dir],d[1],d[1+rgb_dir]); |
| | | break; |
| | | } |
| | | if (write_alpha > 0) |
| | | fwrite(&d[comp-1], 1, 1, f); |
| | | } |
| | | fwrite(&zero,scanline_pad,1,f); |
| | | s->func(s->context, &zero, scanline_pad); |
| | | } |
| | | } |
| | | |
| | | static int outfile(char const *filename, int rgb_dir, int vdir, int x, int y, int comp, int expand_mono, void *data, int alpha, int pad, const char *fmt, ...) |
| | | static int stbiw__outfile(stbi__write_context *s, int rgb_dir, int vdir, int x, int y, int comp, int expand_mono, void *data, int alpha, int pad, const char *fmt, ...) |
| | | { |
| | | FILE *f; |
| | | if (y < 0 || x < 0) return 0; |
| | | f = fopen(filename, "wb"); |
| | | if (f) { |
| | | if (y < 0 || x < 0) { |
| | | return 0; |
| | | } else { |
| | | va_list v; |
| | | va_start(v, fmt); |
| | | writefv(f, fmt, v); |
| | | stbiw__writefv(s, fmt, v); |
| | | va_end(v); |
| | | write_pixels(f,rgb_dir,vdir,x,y,comp,data,alpha,pad,expand_mono); |
| | | fclose(f); |
| | | stbiw__write_pixels(s,rgb_dir,vdir,x,y,comp,data,alpha,pad, expand_mono); |
| | | return 1; |
| | | } |
| | | return f != NULL; |
| | | } |
| | | |
| | | int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data) |
| | | static int stbi_write_bmp_core(stbi__write_context *s, int x, int y, int comp, const void *data) |
| | | { |
| | | int pad = (-x*3) & 3; |
| | | return outfile(filename,-1,-1,x,y,comp,1,(void *) data,0,pad, |
| | | return stbiw__outfile(s,-1,-1,x,y,comp,1,(void *) data,0,pad, |
| | | "11 4 22 4" "4 44 22 444444", |
| | | 'B', 'M', 14+40+(x*3+pad)*y, 0,0, 14+40, // file header |
| | | 40, x,y, 1,24, 0,0,0,0,0,0); // bitmap header |
| | | } |
| | | |
| | | int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data) |
| | | STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data) |
| | | { |
| | | stbi__write_context s; |
| | | stbi__start_write_callbacks(&s, func, context); |
| | | return stbi_write_bmp_core(&s, x, y, comp, data); |
| | | } |
| | | |
| | | #ifndef STBI_WRITE_NO_STDIO |
| | | STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data) |
| | | { |
| | | stbi__write_context s; |
| | | if (stbi__start_write_file(&s,filename)) { |
| | | int r = stbi_write_bmp_core(&s, x, y, comp, data); |
| | | stbi__end_write_file(&s); |
| | | return r; |
| | | } else |
| | | return 0; |
| | | } |
| | | #endif //!STBI_WRITE_NO_STDIO |
| | | |
| | | static int stbi_write_tga_core(stbi__write_context *s, int x, int y, int comp, void *data) |
| | | { |
| | | int has_alpha = (comp == 2 || comp == 4); |
| | | int colorbytes = has_alpha ? comp-1 : comp; |
| | | int format = colorbytes < 2 ? 3 : 2; // 3 color channels (RGB/RGBA) = 2, 1 color channel (Y/YA) = 3 |
| | | return outfile(filename, -1,-1, x, y, comp, 0, (void *) data, has_alpha, 0, |
| | | |
| | | if (y < 0 || x < 0) |
| | | return 0; |
| | | |
| | | if (!stbi_write_tga_with_rle) { |
| | | return stbiw__outfile(s, -1, -1, x, y, comp, 0, (void *) data, has_alpha, 0, |
| | | "111 221 2222 11", 0,0,format, 0,0,0, 0,0,x,y, (colorbytes+has_alpha)*8, has_alpha*8); |
| | | } else { |
| | | int i,j,k; |
| | | |
| | | stbiw__writef(s, "111 221 2222 11", 0,0,format+8, 0,0,0, 0,0,x,y, (colorbytes + has_alpha) * 8, has_alpha * 8); |
| | | |
| | | for (j = y - 1; j >= 0; --j) { |
| | | unsigned char *row = (unsigned char *) data + j * x * comp; |
| | | int len; |
| | | |
| | | for (i = 0; i < x; i += len) { |
| | | unsigned char *begin = row + i * comp; |
| | | int diff = 1; |
| | | len = 1; |
| | | |
| | | if (i < x - 1) { |
| | | ++len; |
| | | diff = memcmp(begin, row + (i + 1) * comp, comp); |
| | | if (diff) { |
| | | const unsigned char *prev = begin; |
| | | for (k = i + 2; k < x && len < 128; ++k) { |
| | | if (memcmp(prev, row + k * comp, comp)) { |
| | | prev += comp; |
| | | ++len; |
| | | } else { |
| | | --len; |
| | | break; |
| | | } |
| | | } |
| | | } else { |
| | | for (k = i + 2; k < x && len < 128; ++k) { |
| | | if (!memcmp(begin, row + k * comp, comp)) { |
| | | ++len; |
| | | } else { |
| | | break; |
| | | } |
| | | } |
| | | } |
| | | } |
| | | |
| | | if (diff) { |
| | | unsigned char header = STBIW_UCHAR(len - 1); |
| | | s->func(s->context, &header, 1); |
| | | for (k = 0; k < len; ++k) { |
| | | stbiw__write_pixel(s, -1, comp, has_alpha, 0, begin + k * comp); |
| | | } |
| | | } else { |
| | | unsigned char header = STBIW_UCHAR(len - 129); |
| | | s->func(s->context, &header, 1); |
| | | stbiw__write_pixel(s, -1, comp, has_alpha, 0, begin); |
| | | } |
| | | } |
| | | } |
| | | } |
| | | return 1; |
| | | } |
| | | |
| | | STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data) |
| | | { |
| | | stbi__write_context s; |
| | | stbi__start_write_callbacks(&s, func, context); |
| | | return stbi_write_tga_core(&s, x, y, comp, (void *) data); |
| | | } |
| | | |
| | | #ifndef STBI_WRITE_NO_STDIO |
| | | STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data) |
| | | { |
| | | stbi__write_context s; |
| | | if (stbi__start_write_file(&s,filename)) { |
| | | int r = stbi_write_tga_core(&s, x, y, comp, (void *) data); |
| | | stbi__end_write_file(&s); |
| | | return r; |
| | | } else |
| | | return 0; |
| | | } |
| | | #endif |
| | | |
| | | // ************************************************************************************************* |
| | | // Radiance RGBE HDR writer |
| | | // by Baldur Karlsson |
| | | |
| | | #define stbiw__max(a, b) ((a) > (b) ? (a) : (b)) |
| | | |
| | | void stbiw__linear_to_rgbe(unsigned char *rgbe, float *linear) |
| | |
| | | int exponent; |
| | | float maxcomp = stbiw__max(linear[0], stbiw__max(linear[1], linear[2])); |
| | | |
| | | if (maxcomp < 1e-32) { |
| | | if (maxcomp < 1e-32f) { |
| | | rgbe[0] = rgbe[1] = rgbe[2] = rgbe[3] = 0; |
| | | } else { |
| | | float normalize = (float) frexp(maxcomp, &exponent) * 256.0f/maxcomp; |
| | |
| | | } |
| | | } |
| | | |
| | | void stbiw__write_run_data(FILE *f, int length, unsigned char databyte) |
| | | void stbiw__write_run_data(stbi__write_context *s, int length, unsigned char databyte) |
| | | { |
| | | unsigned char lengthbyte = (unsigned char) (length+128); |
| | | unsigned char lengthbyte = STBIW_UCHAR(length+128); |
| | | STBIW_ASSERT(length+128 <= 255); |
| | | fwrite(&lengthbyte, 1, 1, f); |
| | | fwrite(&databyte, 1, 1, f); |
| | | s->func(s->context, &lengthbyte, 1); |
| | | s->func(s->context, &databyte, 1); |
| | | } |
| | | |
| | | void stbiw__write_dump_data(FILE *f, int length, unsigned char *data) |
| | | void stbiw__write_dump_data(stbi__write_context *s, int length, unsigned char *data) |
| | | { |
| | | unsigned char lengthbyte = (unsigned char )(length & 0xff); |
| | | unsigned char lengthbyte = STBIW_UCHAR(length); |
| | | STBIW_ASSERT(length <= 128); // inconsistent with spec but consistent with official code |
| | | fwrite(&lengthbyte, 1, 1, f); |
| | | fwrite(data, length, 1, f); |
| | | s->func(s->context, &lengthbyte, 1); |
| | | s->func(s->context, data, length); |
| | | } |
| | | |
| | | void stbiw__write_hdr_scanline(FILE *f, int width, int comp, unsigned char *scratch, const float *scanline) |
| | | void stbiw__write_hdr_scanline(stbi__write_context *s, int width, int ncomp, unsigned char *scratch, float *scanline) |
| | | { |
| | | unsigned char scanlineheader[4] = { 2, 2, 0, 0 }; |
| | | unsigned char rgbe[4]; |
| | | float linear[3] = {0}; |
| | | float linear[3]; |
| | | int x; |
| | | |
| | | scanlineheader[2] = (width&0xff00)>>8; |
| | |
| | | /* skip RLE for images too small or large */ |
| | | if (width < 8 || width >= 32768) { |
| | | for (x=0; x < width; x++) { |
| | | switch (comp) { |
| | | switch (ncomp) { |
| | | case 4: /* fallthrough */ |
| | | case 3: linear[2] = scanline[x*comp + 2]; |
| | | linear[1] = scanline[x*comp + 1]; |
| | | linear[0] = scanline[x*comp + 0]; |
| | | case 3: linear[2] = scanline[x*ncomp + 2]; |
| | | linear[1] = scanline[x*ncomp + 1]; |
| | | linear[0] = scanline[x*ncomp + 0]; |
| | | break; |
| | | case 2: /* fallthrough */ |
| | | case 1: linear[0] = linear[1] = linear[2] = scanline[x*comp + 0]; |
| | | default: |
| | | linear[0] = linear[1] = linear[2] = scanline[x*ncomp + 0]; |
| | | break; |
| | | } |
| | | stbiw__linear_to_rgbe(rgbe, linear); |
| | | fwrite(rgbe, 4, 1, f); |
| | | s->func(s->context, rgbe, 4); |
| | | } |
| | | } else { |
| | | int c,r; |
| | | /* encode into scratch buffer */ |
| | | for (x=0; x < width; x++) { |
| | | switch(comp) { |
| | | switch(ncomp) { |
| | | case 4: /* fallthrough */ |
| | | case 3: linear[2] = scanline[x*comp + 2]; |
| | | linear[1] = scanline[x*comp + 1]; |
| | | linear[0] = scanline[x*comp + 0]; |
| | | case 3: linear[2] = scanline[x*ncomp + 2]; |
| | | linear[1] = scanline[x*ncomp + 1]; |
| | | linear[0] = scanline[x*ncomp + 0]; |
| | | break; |
| | | case 2: /* fallthrough */ |
| | | case 1: linear[0] = linear[1] = linear[2] = scanline[x*comp + 0]; |
| | | default: |
| | | linear[0] = linear[1] = linear[2] = scanline[x*ncomp + 0]; |
| | | break; |
| | | } |
| | | stbiw__linear_to_rgbe(rgbe, linear); |
| | |
| | | scratch[x + width*3] = rgbe[3]; |
| | | } |
| | | |
| | | fwrite(scanlineheader, 4, 1, f); |
| | | s->func(s->context, scanlineheader, 4); |
| | | |
| | | /* RLE each component separately */ |
| | | for (c=0; c < 4; c++) { |
| | |
| | | while (x < r) { |
| | | int len = r-x; |
| | | if (len > 128) len = 128; |
| | | stbiw__write_dump_data(f, len, &comp[x]); |
| | | stbiw__write_dump_data(s, len, &comp[x]); |
| | | x += len; |
| | | } |
| | | // if there's a run, output it |
| | |
| | | while (x < r) { |
| | | int len = r-x; |
| | | if (len > 127) len = 127; |
| | | stbiw__write_run_data(f, len, comp[x]); |
| | | stbiw__write_run_data(s, len, comp[x]); |
| | | x += len; |
| | | } |
| | | } |
| | |
| | | } |
| | | } |
| | | |
| | | int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data) |
| | | static int stbi_write_hdr_core(stbi__write_context *s, int x, int y, int comp, float *data) |
| | | { |
| | | int i; |
| | | FILE *f; |
| | | if (y <= 0 || x <= 0 || data == NULL) return 0; |
| | | f = fopen(filename, "wb"); |
| | | if (f) { |
| | | /* Each component is stored separately. Allocate scratch space for full output scanline. */ |
| | | if (y <= 0 || x <= 0 || data == NULL) |
| | | return 0; |
| | | else { |
| | | // Each component is stored separately. Allocate scratch space for full output scanline. |
| | | unsigned char *scratch = (unsigned char *) STBIW_MALLOC(x*4); |
| | | fprintf(f, "#?RADIANCE\n# Written by stb_image_write.h\nFORMAT=32-bit_rle_rgbe\n" ); |
| | | fprintf(f, "EXPOSURE= 1.0000000000000\n\n-Y %d +X %d\n" , y, x); |
| | | int i, len; |
| | | char buffer[128]; |
| | | char header[] = "#?RADIANCE\n# Written by stb_image_write.h\nFORMAT=32-bit_rle_rgbe\n"; |
| | | s->func(s->context, header, sizeof(header)-1); |
| | | |
| | | len = sprintf(buffer, "EXPOSURE= 1.0000000000000\n\n-Y %d +X %d\n", y, x); |
| | | s->func(s->context, buffer, len); |
| | | |
| | | for(i=0; i < y; i++) |
| | | stbiw__write_hdr_scanline(f, x, comp, scratch, data + comp*i*x); |
| | | stbiw__write_hdr_scanline(s, x, comp, scratch, data + comp*i*x); |
| | | STBIW_FREE(scratch); |
| | | fclose(f); |
| | | return 1; |
| | | } |
| | | return f != NULL; |
| | | } |
| | | |
| | | ///////////////////////////////////////////////////////// |
| | | // PNG |
| | | STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data) |
| | | { |
| | | stbi__write_context s; |
| | | stbi__start_write_callbacks(&s, func, context); |
| | | return stbi_write_hdr_core(&s, x, y, comp, (float *) data); |
| | | } |
| | | |
| | | #ifndef STBI_WRITE_NO_STDIO |
| | | STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data) |
| | | { |
| | | stbi__write_context s; |
| | | if (stbi__start_write_file(&s,filename)) { |
| | | int r = stbi_write_hdr_core(&s, x, y, comp, (float *) data); |
| | | stbi__end_write_file(&s); |
| | | return r; |
| | | } else |
| | | return 0; |
| | | } |
| | | #endif // STBI_WRITE_NO_STDIO |
| | | |
| | | |
| | | ////////////////////////////////////////////////////////////////////////////// |
| | | // |
| | | // PNG writer |
| | | // |
| | | |
| | | // stretchy buffer; stbiw__sbpush() == vector<>::push_back() -- stbiw__sbcount() == vector<>::size() |
| | | #define stbiw__sbraw(a) ((int *) (a) - 2) |
| | |
| | | static void *stbiw__sbgrowf(void **arr, int increment, int itemsize) |
| | | { |
| | | int m = *arr ? 2*stbiw__sbm(*arr)+increment : increment+1; |
| | | void *p = STBIW_REALLOC(*arr ? stbiw__sbraw(*arr) : 0, itemsize * m + sizeof(int)*2); |
| | | void *p = STBIW_REALLOC_SIZED(*arr ? stbiw__sbraw(*arr) : 0, *arr ? (stbiw__sbm(*arr)*itemsize + sizeof(int)*2) : 0, itemsize * m + sizeof(int)*2); |
| | | STBIW_ASSERT(p); |
| | | if (p) { |
| | | if (!*arr) ((int *) p)[1] = 0; |
| | |
| | | static unsigned char *stbiw__zlib_flushf(unsigned char *data, unsigned int *bitbuffer, int *bitcount) |
| | | { |
| | | while (*bitcount >= 8) { |
| | | stbiw__sbpush(data, (unsigned char) *bitbuffer); |
| | | stbiw__sbpush(data, STBIW_UCHAR(*bitbuffer)); |
| | | *bitbuffer >>= 8; |
| | | *bitcount -= 8; |
| | | } |
| | |
| | | unsigned int bitbuf=0; |
| | | int i,j, bitcount=0; |
| | | unsigned char *out = NULL; |
| | | unsigned char **hash_table[stbiw__ZHASH]; // 64KB on the stack! |
| | | unsigned char ***hash_table = (unsigned char***) STBIW_MALLOC(stbiw__ZHASH * sizeof(char**)); |
| | | if (quality < 5) quality = 5; |
| | | |
| | | stbiw__sbpush(out, 0x78); // DEFLATE 32K window |
| | |
| | | |
| | | for (i=0; i < stbiw__ZHASH; ++i) |
| | | (void) stbiw__sbfree(hash_table[i]); |
| | | STBIW_FREE(hash_table); |
| | | |
| | | { |
| | | // compute adler32 on input |
| | | unsigned int i=0, s1=1, s2=0, blocklen = data_len % 5552; |
| | | int j=0; |
| | | unsigned int s1=1, s2=0; |
| | | int blocklen = (int) (data_len % 5552); |
| | | j=0; |
| | | while (j < data_len) { |
| | | for (i=0; i < blocklen; ++i) s1 += data[j+i], s2 += s1; |
| | | s1 %= 65521, s2 %= 65521; |
| | | j += blocklen; |
| | | blocklen = 5552; |
| | | } |
| | | stbiw__sbpush(out, (unsigned char) (s2 >> 8)); |
| | | stbiw__sbpush(out, (unsigned char) s2); |
| | | stbiw__sbpush(out, (unsigned char) (s1 >> 8)); |
| | | stbiw__sbpush(out, (unsigned char) s1); |
| | | stbiw__sbpush(out, STBIW_UCHAR(s2 >> 8)); |
| | | stbiw__sbpush(out, STBIW_UCHAR(s2)); |
| | | stbiw__sbpush(out, STBIW_UCHAR(s1 >> 8)); |
| | | stbiw__sbpush(out, STBIW_UCHAR(s1)); |
| | | } |
| | | *out_len = stbiw__sbn(out); |
| | | // make returned pointer freeable |
| | |
| | | return (unsigned char *) stbiw__sbraw(out); |
| | | } |
| | | |
| | | unsigned int stbiw__crc32(unsigned char *buffer, int len) |
| | | static unsigned int stbiw__crc32(unsigned char *buffer, int len) |
| | | { |
| | | static unsigned int crc_table[256]; |
| | | static unsigned int crc_table[256] = |
| | | { |
| | | 0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3, |
| | | 0x0eDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, |
| | | 0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7, |
| | | 0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5, |
| | | 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, |
| | | 0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59, |
| | | 0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F, |
| | | 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, |
| | | 0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433, |
| | | 0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01, |
| | | 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, |
| | | 0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65, |
| | | 0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB, |
| | | 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, |
| | | 0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F, |
| | | 0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD, |
| | | 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, |
| | | 0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1, |
| | | 0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7, |
| | | 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, |
| | | 0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B, |
| | | 0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79, |
| | | 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, |
| | | 0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D, |
| | | 0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713, |
| | | 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, |
| | | 0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777, |
| | | 0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45, |
| | | 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, |
| | | 0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9, |
| | | 0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF, |
| | | 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D |
| | | }; |
| | | |
| | | unsigned int crc = ~0u; |
| | | int i,j; |
| | | if (crc_table[1] == 0) |
| | | for(i=0; i < 256; i++) |
| | | for (crc_table[i]=i, j=0; j < 8; ++j) |
| | | crc_table[i] = (crc_table[i] >> 1) ^ (crc_table[i] & 1 ? 0xedb88320 : 0); |
| | | int i; |
| | | for (i=0; i < len; ++i) |
| | | crc = (crc >> 8) ^ crc_table[buffer[i] ^ (crc & 0xff)]; |
| | | return ~crc; |
| | | } |
| | | |
| | | #define stbiw__wpng4(o,a,b,c,d) ((o)[0]=(unsigned char)(a),(o)[1]=(unsigned char)(b),(o)[2]=(unsigned char)(c),(o)[3]=(unsigned char)(d),(o)+=4) |
| | | #define stbiw__wpng4(o,a,b,c,d) ((o)[0]=STBIW_UCHAR(a),(o)[1]=STBIW_UCHAR(b),(o)[2]=STBIW_UCHAR(c),(o)[3]=STBIW_UCHAR(d),(o)+=4) |
| | | #define stbiw__wp32(data,v) stbiw__wpng4(data, (v)>>24,(v)>>16,(v)>>8,(v)); |
| | | #define stbiw__wptag(data,s) stbiw__wpng4(data, s[0],s[1],s[2],s[3]) |
| | | |
| | |
| | | static unsigned char stbiw__paeth(int a, int b, int c) |
| | | { |
| | | int p = a + b - c, pa = abs(p-a), pb = abs(p-b), pc = abs(p-c); |
| | | if (pa <= pb && pa <= pc) return (unsigned char) a; |
| | | if (pb <= pc) return (unsigned char) b; |
| | | return (unsigned char) c; |
| | | if (pa <= pb && pa <= pc) return STBIW_UCHAR(a); |
| | | if (pb <= pc) return STBIW_UCHAR(b); |
| | | return STBIW_UCHAR(c); |
| | | } |
| | | |
| | | // @OPTIMIZE: provide an option that always forces left-predict or paeth predict |
| | | unsigned char *stbi_write_png_to_mem(unsigned char *pixels, int stride_bytes, int x, int y, int n, int *out_len) |
| | | { |
| | | int ctype[5] = { -1, 0, 4, 2, 6 }; |
| | |
| | | for (j=0; j < y; ++j) { |
| | | static int mapping[] = { 0,1,2,3,4 }; |
| | | static int firstmap[] = { 0,1,0,5,6 }; |
| | | int *mymap = j ? mapping : firstmap; |
| | | int *mymap = (j != 0) ? mapping : firstmap; |
| | | int best = 0, bestval = 0x7fffffff; |
| | | for (p=0; p < 2; ++p) { |
| | | for (k= p?best:0; k < 5; ++k) { |
| | | for (k= p?best:0; k < 5; ++k) { // @TODO: clarity: rewrite this to go 0..5, and 'continue' the unwanted ones during 2nd pass |
| | | int type = mymap[k],est=0; |
| | | unsigned char *z = pixels + stride_bytes*j; |
| | | for (i=0; i < n; ++i) |
| | |
| | | stbiw__wp32(o, x); |
| | | stbiw__wp32(o, y); |
| | | *o++ = 8; |
| | | *o++ = (unsigned char) ctype[n]; |
| | | *o++ = STBIW_UCHAR(ctype[n]); |
| | | *o++ = 0; |
| | | *o++ = 0; |
| | | *o++ = 0; |
| | |
| | | return out; |
| | | } |
| | | |
| | | int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes) |
| | | #ifndef STBI_WRITE_NO_STDIO |
| | | STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes) |
| | | { |
| | | FILE *f; |
| | | int len; |
| | | unsigned char *png = stbi_write_png_to_mem((unsigned char *) data, stride_bytes, x, y, comp, &len); |
| | | if (!png) return 0; |
| | | if (png == NULL) return 0; |
| | | f = fopen(filename, "wb"); |
| | | if (!f) { STBIW_FREE(png); return 0; } |
| | | fwrite(png, 1, len, f); |
| | |
| | | STBIW_FREE(png); |
| | | return 1; |
| | | } |
| | | #endif |
| | | |
| | | STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes) |
| | | { |
| | | int len; |
| | | unsigned char *png = stbi_write_png_to_mem((unsigned char *) data, stride_bytes, x, y, comp, &len); |
| | | if (png == NULL) return 0; |
| | | func(context, png, len); |
| | | STBIW_FREE(png); |
| | | return 1; |
| | | } |
| | | |
| | | |
| | | /* *************************************************************************** |
| | | * |
| | | * JPEG writer |
| | | * |
| | | * This is based on Jon Olick's jo_jpeg.cpp: |
| | | * public domain Simple, Minimalistic JPEG writer - http://www.jonolick.com/code.html |
| | | */ |
| | | |
| | | static const unsigned char stbiw__jpg_ZigZag[] = { 0,1,5,6,14,15,27,28,2,4,7,13,16,26,29,42,3,8,12,17,25,30,41,43,9,11,18, |
| | | 24,31,40,44,53,10,19,23,32,39,45,52,54,20,22,33,38,46,51,55,60,21,34,37,47,50,56,59,61,35,36,48,49,57,58,62,63 }; |
| | | |
| | | static void stbiw__jpg_writeBits(stbi__write_context *s, int *bitBufP, int *bitCntP, const unsigned short *bs) { |
| | | int bitBuf = *bitBufP, bitCnt = *bitCntP; |
| | | bitCnt += bs[1]; |
| | | bitBuf |= bs[0] << (24 - bitCnt); |
| | | while(bitCnt >= 8) { |
| | | unsigned char c = (bitBuf >> 16) & 255; |
| | | stbiw__putc(s, c); |
| | | if(c == 255) { |
| | | stbiw__putc(s, 0); |
| | | } |
| | | bitBuf <<= 8; |
| | | bitCnt -= 8; |
| | | } |
| | | *bitBufP = bitBuf; |
| | | *bitCntP = bitCnt; |
| | | } |
| | | |
| | | static void stbiw__jpg_DCT(float *d0p, float *d1p, float *d2p, float *d3p, float *d4p, float *d5p, float *d6p, float *d7p) { |
| | | float d0 = *d0p, d1 = *d1p, d2 = *d2p, d3 = *d3p, d4 = *d4p, d5 = *d5p, d6 = *d6p, d7 = *d7p; |
| | | float z1, z2, z3, z4, z5, z11, z13; |
| | | |
| | | float tmp0 = d0 + d7; |
| | | float tmp7 = d0 - d7; |
| | | float tmp1 = d1 + d6; |
| | | float tmp6 = d1 - d6; |
| | | float tmp2 = d2 + d5; |
| | | float tmp5 = d2 - d5; |
| | | float tmp3 = d3 + d4; |
| | | float tmp4 = d3 - d4; |
| | | |
| | | // Even part |
| | | float tmp10 = tmp0 + tmp3; // phase 2 |
| | | float tmp13 = tmp0 - tmp3; |
| | | float tmp11 = tmp1 + tmp2; |
| | | float tmp12 = tmp1 - tmp2; |
| | | |
| | | d0 = tmp10 + tmp11; // phase 3 |
| | | d4 = tmp10 - tmp11; |
| | | |
| | | z1 = (tmp12 + tmp13) * 0.707106781f; // c4 |
| | | d2 = tmp13 + z1; // phase 5 |
| | | d6 = tmp13 - z1; |
| | | |
| | | // Odd part |
| | | tmp10 = tmp4 + tmp5; // phase 2 |
| | | tmp11 = tmp5 + tmp6; |
| | | tmp12 = tmp6 + tmp7; |
| | | |
| | | // The rotator is modified from fig 4-8 to avoid extra negations. |
| | | z5 = (tmp10 - tmp12) * 0.382683433f; // c6 |
| | | z2 = tmp10 * 0.541196100f + z5; // c2-c6 |
| | | z4 = tmp12 * 1.306562965f + z5; // c2+c6 |
| | | z3 = tmp11 * 0.707106781f; // c4 |
| | | |
| | | z11 = tmp7 + z3; // phase 5 |
| | | z13 = tmp7 - z3; |
| | | |
| | | *d5p = z13 + z2; // phase 6 |
| | | *d3p = z13 - z2; |
| | | *d1p = z11 + z4; |
| | | *d7p = z11 - z4; |
| | | |
| | | *d0p = d0; *d2p = d2; *d4p = d4; *d6p = d6; |
| | | } |
| | | |
| | | static void stbiw__jpg_calcBits(int val, unsigned short bits[2]) { |
| | | int tmp1 = val < 0 ? -val : val; |
| | | val = val < 0 ? val-1 : val; |
| | | bits[1] = 1; |
| | | while(tmp1 >>= 1) { |
| | | ++bits[1]; |
| | | } |
| | | bits[0] = val & ((1<<bits[1])-1); |
| | | } |
| | | |
| | | static int stbiw__jpg_processDU(stbi__write_context *s, int *bitBuf, int *bitCnt, float *CDU, float *fdtbl, int DC, const unsigned short HTDC[256][2], const unsigned short HTAC[256][2]) { |
| | | const unsigned short EOB[2] = { HTAC[0x00][0], HTAC[0x00][1] }; |
| | | const unsigned short M16zeroes[2] = { HTAC[0xF0][0], HTAC[0xF0][1] }; |
| | | int dataOff, i, diff, end0pos; |
| | | int DU[64]; |
| | | |
| | | // DCT rows |
| | | for(dataOff=0; dataOff<64; dataOff+=8) { |
| | | stbiw__jpg_DCT(&CDU[dataOff], &CDU[dataOff+1], &CDU[dataOff+2], &CDU[dataOff+3], &CDU[dataOff+4], &CDU[dataOff+5], &CDU[dataOff+6], &CDU[dataOff+7]); |
| | | } |
| | | // DCT columns |
| | | for(dataOff=0; dataOff<8; ++dataOff) { |
| | | stbiw__jpg_DCT(&CDU[dataOff], &CDU[dataOff+8], &CDU[dataOff+16], &CDU[dataOff+24], &CDU[dataOff+32], &CDU[dataOff+40], &CDU[dataOff+48], &CDU[dataOff+56]); |
| | | } |
| | | // Quantize/descale/zigzag the coefficients |
| | | for(i=0; i<64; ++i) { |
| | | float v = CDU[i]*fdtbl[i]; |
| | | // DU[stbiw__jpg_ZigZag[i]] = (int)(v < 0 ? ceilf(v - 0.5f) : floorf(v + 0.5f)); |
| | | // ceilf() and floorf() are C99, not C89, but I /think/ they're not needed here anyway? |
| | | DU[stbiw__jpg_ZigZag[i]] = (int)(v < 0 ? v - 0.5f : v + 0.5f); |
| | | } |
| | | |
| | | // Encode DC |
| | | diff = DU[0] - DC; |
| | | if (diff == 0) { |
| | | stbiw__jpg_writeBits(s, bitBuf, bitCnt, HTDC[0]); |
| | | } else { |
| | | unsigned short bits[2]; |
| | | stbiw__jpg_calcBits(diff, bits); |
| | | stbiw__jpg_writeBits(s, bitBuf, bitCnt, HTDC[bits[1]]); |
| | | stbiw__jpg_writeBits(s, bitBuf, bitCnt, bits); |
| | | } |
| | | // Encode ACs |
| | | end0pos = 63; |
| | | for(; (end0pos>0)&&(DU[end0pos]==0); --end0pos) { |
| | | } |
| | | // end0pos = first element in reverse order !=0 |
| | | if(end0pos == 0) { |
| | | stbiw__jpg_writeBits(s, bitBuf, bitCnt, EOB); |
| | | return DU[0]; |
| | | } |
| | | for(i = 1; i <= end0pos; ++i) { |
| | | int startpos = i; |
| | | int nrzeroes; |
| | | unsigned short bits[2]; |
| | | for (; DU[i]==0 && i<=end0pos; ++i) { |
| | | } |
| | | nrzeroes = i-startpos; |
| | | if ( nrzeroes >= 16 ) { |
| | | int lng = nrzeroes>>4; |
| | | int nrmarker; |
| | | for (nrmarker=1; nrmarker <= lng; ++nrmarker) |
| | | stbiw__jpg_writeBits(s, bitBuf, bitCnt, M16zeroes); |
| | | nrzeroes &= 15; |
| | | } |
| | | stbiw__jpg_calcBits(DU[i], bits); |
| | | stbiw__jpg_writeBits(s, bitBuf, bitCnt, HTAC[(nrzeroes<<4)+bits[1]]); |
| | | stbiw__jpg_writeBits(s, bitBuf, bitCnt, bits); |
| | | } |
| | | if(end0pos != 63) { |
| | | stbiw__jpg_writeBits(s, bitBuf, bitCnt, EOB); |
| | | } |
| | | return DU[0]; |
| | | } |
| | | |
| | | static int stbi_write_jpg_core(stbi__write_context *s, int width, int height, int comp, const void* data, int quality) { |
| | | // Constants that don't pollute global namespace |
| | | static const unsigned char std_dc_luminance_nrcodes[] = {0,0,1,5,1,1,1,1,1,1,0,0,0,0,0,0,0}; |
| | | static const unsigned char std_dc_luminance_values[] = {0,1,2,3,4,5,6,7,8,9,10,11}; |
| | | static const unsigned char std_ac_luminance_nrcodes[] = {0,0,2,1,3,3,2,4,3,5,5,4,4,0,0,1,0x7d}; |
| | | static const unsigned char std_ac_luminance_values[] = { |
| | | 0x01,0x02,0x03,0x00,0x04,0x11,0x05,0x12,0x21,0x31,0x41,0x06,0x13,0x51,0x61,0x07,0x22,0x71,0x14,0x32,0x81,0x91,0xa1,0x08, |
| | | 0x23,0x42,0xb1,0xc1,0x15,0x52,0xd1,0xf0,0x24,0x33,0x62,0x72,0x82,0x09,0x0a,0x16,0x17,0x18,0x19,0x1a,0x25,0x26,0x27,0x28, |
| | | 0x29,0x2a,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x53,0x54,0x55,0x56,0x57,0x58,0x59, |
| | | 0x5a,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x83,0x84,0x85,0x86,0x87,0x88,0x89, |
| | | 0x8a,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xb2,0xb3,0xb4,0xb5,0xb6, |
| | | 0xb7,0xb8,0xb9,0xba,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda,0xe1,0xe2, |
| | | 0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe9,0xea,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa |
| | | }; |
| | | static const unsigned char std_dc_chrominance_nrcodes[] = {0,0,3,1,1,1,1,1,1,1,1,1,0,0,0,0,0}; |
| | | static const unsigned char std_dc_chrominance_values[] = {0,1,2,3,4,5,6,7,8,9,10,11}; |
| | | static const unsigned char std_ac_chrominance_nrcodes[] = {0,0,2,1,2,4,4,3,4,7,5,4,4,0,1,2,0x77}; |
| | | static const unsigned char std_ac_chrominance_values[] = { |
| | | 0x00,0x01,0x02,0x03,0x11,0x04,0x05,0x21,0x31,0x06,0x12,0x41,0x51,0x07,0x61,0x71,0x13,0x22,0x32,0x81,0x08,0x14,0x42,0x91, |
| | | 0xa1,0xb1,0xc1,0x09,0x23,0x33,0x52,0xf0,0x15,0x62,0x72,0xd1,0x0a,0x16,0x24,0x34,0xe1,0x25,0xf1,0x17,0x18,0x19,0x1a,0x26, |
| | | 0x27,0x28,0x29,0x2a,0x35,0x36,0x37,0x38,0x39,0x3a,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x53,0x54,0x55,0x56,0x57,0x58, |
| | | 0x59,0x5a,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x82,0x83,0x84,0x85,0x86,0x87, |
| | | 0x88,0x89,0x8a,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xb2,0xb3,0xb4, |
| | | 0xb5,0xb6,0xb7,0xb8,0xb9,0xba,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda, |
| | | 0xe2,0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe9,0xea,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa |
| | | }; |
| | | // Huffman tables |
| | | static const unsigned short YDC_HT[256][2] = { {0,2},{2,3},{3,3},{4,3},{5,3},{6,3},{14,4},{30,5},{62,6},{126,7},{254,8},{510,9}}; |
| | | static const unsigned short UVDC_HT[256][2] = { {0,2},{1,2},{2,2},{6,3},{14,4},{30,5},{62,6},{126,7},{254,8},{510,9},{1022,10},{2046,11}}; |
| | | static const unsigned short YAC_HT[256][2] = { |
| | | {10,4},{0,2},{1,2},{4,3},{11,4},{26,5},{120,7},{248,8},{1014,10},{65410,16},{65411,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {12,4},{27,5},{121,7},{502,9},{2038,11},{65412,16},{65413,16},{65414,16},{65415,16},{65416,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {28,5},{249,8},{1015,10},{4084,12},{65417,16},{65418,16},{65419,16},{65420,16},{65421,16},{65422,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {58,6},{503,9},{4085,12},{65423,16},{65424,16},{65425,16},{65426,16},{65427,16},{65428,16},{65429,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {59,6},{1016,10},{65430,16},{65431,16},{65432,16},{65433,16},{65434,16},{65435,16},{65436,16},{65437,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {122,7},{2039,11},{65438,16},{65439,16},{65440,16},{65441,16},{65442,16},{65443,16},{65444,16},{65445,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {123,7},{4086,12},{65446,16},{65447,16},{65448,16},{65449,16},{65450,16},{65451,16},{65452,16},{65453,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {250,8},{4087,12},{65454,16},{65455,16},{65456,16},{65457,16},{65458,16},{65459,16},{65460,16},{65461,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {504,9},{32704,15},{65462,16},{65463,16},{65464,16},{65465,16},{65466,16},{65467,16},{65468,16},{65469,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {505,9},{65470,16},{65471,16},{65472,16},{65473,16},{65474,16},{65475,16},{65476,16},{65477,16},{65478,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {506,9},{65479,16},{65480,16},{65481,16},{65482,16},{65483,16},{65484,16},{65485,16},{65486,16},{65487,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {1017,10},{65488,16},{65489,16},{65490,16},{65491,16},{65492,16},{65493,16},{65494,16},{65495,16},{65496,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {1018,10},{65497,16},{65498,16},{65499,16},{65500,16},{65501,16},{65502,16},{65503,16},{65504,16},{65505,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {2040,11},{65506,16},{65507,16},{65508,16},{65509,16},{65510,16},{65511,16},{65512,16},{65513,16},{65514,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {65515,16},{65516,16},{65517,16},{65518,16},{65519,16},{65520,16},{65521,16},{65522,16},{65523,16},{65524,16},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {2041,11},{65525,16},{65526,16},{65527,16},{65528,16},{65529,16},{65530,16},{65531,16},{65532,16},{65533,16},{65534,16},{0,0},{0,0},{0,0},{0,0},{0,0} |
| | | }; |
| | | static const unsigned short UVAC_HT[256][2] = { |
| | | {0,2},{1,2},{4,3},{10,4},{24,5},{25,5},{56,6},{120,7},{500,9},{1014,10},{4084,12},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {11,4},{57,6},{246,8},{501,9},{2038,11},{4085,12},{65416,16},{65417,16},{65418,16},{65419,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {26,5},{247,8},{1015,10},{4086,12},{32706,15},{65420,16},{65421,16},{65422,16},{65423,16},{65424,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {27,5},{248,8},{1016,10},{4087,12},{65425,16},{65426,16},{65427,16},{65428,16},{65429,16},{65430,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {58,6},{502,9},{65431,16},{65432,16},{65433,16},{65434,16},{65435,16},{65436,16},{65437,16},{65438,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {59,6},{1017,10},{65439,16},{65440,16},{65441,16},{65442,16},{65443,16},{65444,16},{65445,16},{65446,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {121,7},{2039,11},{65447,16},{65448,16},{65449,16},{65450,16},{65451,16},{65452,16},{65453,16},{65454,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {122,7},{2040,11},{65455,16},{65456,16},{65457,16},{65458,16},{65459,16},{65460,16},{65461,16},{65462,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {249,8},{65463,16},{65464,16},{65465,16},{65466,16},{65467,16},{65468,16},{65469,16},{65470,16},{65471,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {503,9},{65472,16},{65473,16},{65474,16},{65475,16},{65476,16},{65477,16},{65478,16},{65479,16},{65480,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {504,9},{65481,16},{65482,16},{65483,16},{65484,16},{65485,16},{65486,16},{65487,16},{65488,16},{65489,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {505,9},{65490,16},{65491,16},{65492,16},{65493,16},{65494,16},{65495,16},{65496,16},{65497,16},{65498,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {506,9},{65499,16},{65500,16},{65501,16},{65502,16},{65503,16},{65504,16},{65505,16},{65506,16},{65507,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {2041,11},{65508,16},{65509,16},{65510,16},{65511,16},{65512,16},{65513,16},{65514,16},{65515,16},{65516,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {16352,14},{65517,16},{65518,16},{65519,16},{65520,16},{65521,16},{65522,16},{65523,16},{65524,16},{65525,16},{0,0},{0,0},{0,0},{0,0},{0,0}, |
| | | {1018,10},{32707,15},{65526,16},{65527,16},{65528,16},{65529,16},{65530,16},{65531,16},{65532,16},{65533,16},{65534,16},{0,0},{0,0},{0,0},{0,0},{0,0} |
| | | }; |
| | | static const int YQT[] = {16,11,10,16,24,40,51,61,12,12,14,19,26,58,60,55,14,13,16,24,40,57,69,56,14,17,22,29,51,87,80,62,18,22, |
| | | 37,56,68,109,103,77,24,35,55,64,81,104,113,92,49,64,78,87,103,121,120,101,72,92,95,98,112,100,103,99}; |
| | | static const int UVQT[] = {17,18,24,47,99,99,99,99,18,21,26,66,99,99,99,99,24,26,56,99,99,99,99,99,47,66,99,99,99,99,99,99, |
| | | 99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99}; |
| | | static const float aasf[] = { 1.0f * 2.828427125f, 1.387039845f * 2.828427125f, 1.306562965f * 2.828427125f, 1.175875602f * 2.828427125f, |
| | | 1.0f * 2.828427125f, 0.785694958f * 2.828427125f, 0.541196100f * 2.828427125f, 0.275899379f * 2.828427125f }; |
| | | |
| | | int row, col, i, k; |
| | | float fdtbl_Y[64], fdtbl_UV[64]; |
| | | unsigned char YTable[64], UVTable[64]; |
| | | |
| | | if(!data || !width || !height || comp > 4 || comp < 1) { |
| | | return 0; |
| | | } |
| | | |
| | | quality = quality ? quality : 90; |
| | | quality = quality < 1 ? 1 : quality > 100 ? 100 : quality; |
| | | quality = quality < 50 ? 5000 / quality : 200 - quality * 2; |
| | | |
| | | for(i = 0; i < 64; ++i) { |
| | | int uvti, yti = (YQT[i]*quality+50)/100; |
| | | YTable[stbiw__jpg_ZigZag[i]] = (unsigned char) (yti < 1 ? 1 : yti > 255 ? 255 : yti); |
| | | uvti = (UVQT[i]*quality+50)/100; |
| | | UVTable[stbiw__jpg_ZigZag[i]] = (unsigned char) (uvti < 1 ? 1 : uvti > 255 ? 255 : uvti); |
| | | } |
| | | |
| | | for(row = 0, k = 0; row < 8; ++row) { |
| | | for(col = 0; col < 8; ++col, ++k) { |
| | | fdtbl_Y[k] = 1 / (YTable [stbiw__jpg_ZigZag[k]] * aasf[row] * aasf[col]); |
| | | fdtbl_UV[k] = 1 / (UVTable[stbiw__jpg_ZigZag[k]] * aasf[row] * aasf[col]); |
| | | } |
| | | } |
| | | |
| | | // Write Headers |
| | | { |
| | | static const unsigned char head0[] = { 0xFF,0xD8,0xFF,0xE0,0,0x10,'J','F','I','F',0,1,1,0,0,1,0,1,0,0,0xFF,0xDB,0,0x84,0 }; |
| | | static const unsigned char head2[] = { 0xFF,0xDA,0,0xC,3,1,0,2,0x11,3,0x11,0,0x3F,0 }; |
| | | const unsigned char head1[] = { 0xFF,0xC0,0,0x11,8,(unsigned char)(height>>8),STBIW_UCHAR(height),(unsigned char)(width>>8),STBIW_UCHAR(width), |
| | | 3,1,0x11,0,2,0x11,1,3,0x11,1,0xFF,0xC4,0x01,0xA2,0 }; |
| | | s->func(s->context, (void*)head0, sizeof(head0)); |
| | | s->func(s->context, (void*)YTable, sizeof(YTable)); |
| | | stbiw__putc(s, 1); |
| | | s->func(s->context, UVTable, sizeof(UVTable)); |
| | | s->func(s->context, (void*)head1, sizeof(head1)); |
| | | s->func(s->context, (void*)(std_dc_luminance_nrcodes+1), sizeof(std_dc_luminance_nrcodes)-1); |
| | | s->func(s->context, (void*)std_dc_luminance_values, sizeof(std_dc_luminance_values)); |
| | | stbiw__putc(s, 0x10); // HTYACinfo |
| | | s->func(s->context, (void*)(std_ac_luminance_nrcodes+1), sizeof(std_ac_luminance_nrcodes)-1); |
| | | s->func(s->context, (void*)std_ac_luminance_values, sizeof(std_ac_luminance_values)); |
| | | stbiw__putc(s, 1); // HTUDCinfo |
| | | s->func(s->context, (void*)(std_dc_chrominance_nrcodes+1), sizeof(std_dc_chrominance_nrcodes)-1); |
| | | s->func(s->context, (void*)std_dc_chrominance_values, sizeof(std_dc_chrominance_values)); |
| | | stbiw__putc(s, 0x11); // HTUACinfo |
| | | s->func(s->context, (void*)(std_ac_chrominance_nrcodes+1), sizeof(std_ac_chrominance_nrcodes)-1); |
| | | s->func(s->context, (void*)std_ac_chrominance_values, sizeof(std_ac_chrominance_values)); |
| | | s->func(s->context, (void*)head2, sizeof(head2)); |
| | | } |
| | | |
| | | // Encode 8x8 macroblocks |
| | | { |
| | | static const unsigned short fillBits[] = {0x7F, 7}; |
| | | const unsigned char *imageData = (const unsigned char *)data; |
| | | int DCY=0, DCU=0, DCV=0; |
| | | int bitBuf=0, bitCnt=0; |
| | | // comp == 2 is grey+alpha (alpha is ignored) |
| | | int ofsG = comp > 2 ? 1 : 0, ofsB = comp > 2 ? 2 : 0; |
| | | int x, y, pos; |
| | | for(y = 0; y < height; y += 8) { |
| | | for(x = 0; x < width; x += 8) { |
| | | float YDU[64], UDU[64], VDU[64]; |
| | | for(row = y, pos = 0; row < y+8; ++row) { |
| | | for(col = x; col < x+8; ++col, ++pos) { |
| | | int p = row*width*comp + col*comp; |
| | | float r, g, b; |
| | | if(row >= height) { |
| | | p -= width*comp*(row+1 - height); |
| | | } |
| | | if(col >= width) { |
| | | p -= comp*(col+1 - width); |
| | | } |
| | | |
| | | r = imageData[p+0]; |
| | | g = imageData[p+ofsG]; |
| | | b = imageData[p+ofsB]; |
| | | YDU[pos]=+0.29900f*r+0.58700f*g+0.11400f*b-128; |
| | | UDU[pos]=-0.16874f*r-0.33126f*g+0.50000f*b; |
| | | VDU[pos]=+0.50000f*r-0.41869f*g-0.08131f*b; |
| | | } |
| | | } |
| | | |
| | | DCY = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, YDU, fdtbl_Y, DCY, YDC_HT, YAC_HT); |
| | | DCU = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, UDU, fdtbl_UV, DCU, UVDC_HT, UVAC_HT); |
| | | DCV = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, VDU, fdtbl_UV, DCV, UVDC_HT, UVAC_HT); |
| | | } |
| | | } |
| | | |
| | | // Do the bit alignment of the EOI marker |
| | | stbiw__jpg_writeBits(s, &bitBuf, &bitCnt, fillBits); |
| | | } |
| | | |
| | | // EOI |
| | | stbiw__putc(s, 0xFF); |
| | | stbiw__putc(s, 0xD9); |
| | | |
| | | return 1; |
| | | } |
| | | |
| | | STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality) |
| | | { |
| | | stbi__write_context s; |
| | | stbi__start_write_callbacks(&s, func, context); |
| | | return stbi_write_jpg_core(&s, x, y, comp, (void *) data, quality); |
| | | } |
| | | |
| | | |
| | | #ifndef STBI_WRITE_NO_STDIO |
| | | STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality) |
| | | { |
| | | stbi__write_context s; |
| | | if (stbi__start_write_file(&s,filename)) { |
| | | int r = stbi_write_jpg_core(&s, x, y, comp, data, quality); |
| | | stbi__end_write_file(&s); |
| | | return r; |
| | | } else |
| | | return 0; |
| | | } |
| | | #endif |
| | | |
| | | #endif // STB_IMAGE_WRITE_IMPLEMENTATION |
| | | |
| | | /* Revision history |
| | | 1.07 (2017-07-24) |
| | | doc fix |
| | | 1.06 (2017-07-23) |
| | | writing JPEG (using Jon Olick's code) |
| | | 1.05 ??? |
| | | 1.04 (2017-03-03) |
| | | monochrome BMP expansion |
| | | 1.03 ??? |
| | | 1.02 (2016-04-02) |
| | | avoid allocating large structures on the stack |
| | | 1.01 (2016-01-16) |
| | | STBIW_REALLOC_SIZED: support allocators with no realloc support |
| | | avoid race-condition in crc initialization |
| | | minor compile issues |
| | | 1.00 (2015-09-14) |
| | | installable file IO function |
| | | 0.99 (2015-09-13) |
| | | warning fixes; TGA rle support |
| | | 0.98 (2015-04-08) |
| | | added STBIW_MALLOC, STBIW_ASSERT etc |
| | | 0.97 (2015-01-18) |
| | |
| | | first public release |
| | | 0.90 first internal release |
| | | */ |
| | | |
| | | /* |
| | | ------------------------------------------------------------------------------ |
| | | 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. |
| | | ------------------------------------------------------------------------------ |
| | | */ |