jmorecfg.h revision 8e9cef2e6f5156c4b055a04a8f979b7291fc6b7a
136a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane/* 236a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * jmorecfg.h 336a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * 4a73e870ad02de20c2b34cb3a5382c2846c2afbe3DRC * This file was part of the Independent JPEG Group's software: 55ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane * Copyright (C) 1991-1997, Thomas G. Lane. 6c23e36e80009728b8c0f5e36ba6cb07885334d3bDRC * Modified 1997-2009 by Guido Vollbeding. 7da13af6b8d5427af89bbdc5698b4e09d0ea814feDRC * libjpeg-turbo Modifications: 88e9cef2e6f5156c4b055a04a8f979b7291fc6b7aDRC * Copyright (C) 2009, 2011, 2014-2015, D. R. Commander. 936a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * For conditions of distribution and use, see the accompanying README file. 1036a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * 1136a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * This file contains additional configuration options that customize the 1236a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * JPEG software for special applications or support machine-dependent 1336a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * optimizations. Most users will not need to touch this file. 1436a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane */ 1536a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 1636a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 1736a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane/* 1836a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * Maximum number of components (color channels) allowed in JPEG image. 1936a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * To meet the letter of the JPEG spec, set this to 255. However, darn 2036a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * few applications need more than 4 channels (maybe 5 for CMYK + alpha 2136a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * mask). We recommend 10 as a reasonable compromise; use 4 if you are 2236a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * really short on memory. (Each allowed component costs a hundred or so 2336a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * bytes of storage, whether actually used in an image or not.) 2436a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane */ 2536a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 26e5eaf37440b8e337ab150c017df7c03faf846c51DRC#define MAX_COMPONENTS 10 /* maximum number of image components */ 2736a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 2836a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 2936a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane/* 3036a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * Basic data types. 3136a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * You may need to change these if you have a machine with unusual data 3236a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * type sizes; for example, "char" not 8 bits, "short" not 16 bits, 3336a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * or "long" not 32 bits. We don't care whether "int" is 16 or 32 bits, 3436a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * but it had better be at least 16. 3536a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane */ 3636a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 3736a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane/* Representation of a single sample (pixel element value). 3836a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * We frequently allocate large arrays of these, so it's important to keep 3936a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * them small. But if you have memory to burn and access to char or short 4036a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * arrays is very slow on your hardware, you might want to change these. 4136a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane */ 4236a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 4336a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#if BITS_IN_JSAMPLE == 8 4436a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane/* JSAMPLE should be the smallest type that will hold the values 0..255. 4536a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * You can use a signed char by having GETJSAMPLE mask it with 0xFF. 4636a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane */ 4736a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 4836a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#ifdef HAVE_UNSIGNED_CHAR 4936a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 5036a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lanetypedef unsigned char JSAMPLE; 5136a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#define GETJSAMPLE(value) ((int) (value)) 5236a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 5336a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#else /* not HAVE_UNSIGNED_CHAR */ 5436a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 5536a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lanetypedef char JSAMPLE; 560ca44258fc43bc44ea31b875001311591cc5634cConstantin Kaplinsky#ifdef __CHAR_UNSIGNED__ 5736a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#define GETJSAMPLE(value) ((int) (value)) 5836a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#else 5936a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#define GETJSAMPLE(value) ((int) (value) & 0xFF) 600ca44258fc43bc44ea31b875001311591cc5634cConstantin Kaplinsky#endif /* __CHAR_UNSIGNED__ */ 6136a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 6236a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#endif /* HAVE_UNSIGNED_CHAR */ 6336a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 64e5eaf37440b8e337ab150c017df7c03faf846c51DRC#define MAXJSAMPLE 255 65e5eaf37440b8e337ab150c017df7c03faf846c51DRC#define CENTERJSAMPLE 128 6636a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 6736a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#endif /* BITS_IN_JSAMPLE == 8 */ 6836a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 6936a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 7036a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#if BITS_IN_JSAMPLE == 12 7136a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane/* JSAMPLE should be the smallest type that will hold the values 0..4095. 7236a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * On nearly all machines "short" will do nicely. 7336a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane */ 7436a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 7536a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lanetypedef short JSAMPLE; 7636a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#define GETJSAMPLE(value) ((int) (value)) 7736a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 78e5eaf37440b8e337ab150c017df7c03faf846c51DRC#define MAXJSAMPLE 4095 79e5eaf37440b8e337ab150c017df7c03faf846c51DRC#define CENTERJSAMPLE 2048 8036a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 8136a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#endif /* BITS_IN_JSAMPLE == 12 */ 8236a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 8336a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 8436a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane/* Representation of a DCT frequency coefficient. 8536a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * This should be a signed value of at least 16 bits; "short" is usually OK. 8636a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * Again, we allocate large arrays of these, but you can change to int 8736a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * if you have memory to burn and "short" is really slow. 8836a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane */ 8936a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 9036a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lanetypedef short JCOEF; 9136a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 9236a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 9336a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane/* Compressed datastreams are represented as arrays of JOCTET. 9436a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * These must be EXACTLY 8 bits wide, at least once they are written to 9536a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * external storage. Note that when using the stdio data source/destination 9636a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * managers, this is also the data type passed to fread/fwrite. 9736a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane */ 9836a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 9936a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#ifdef HAVE_UNSIGNED_CHAR 10036a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 10136a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lanetypedef unsigned char JOCTET; 10236a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#define GETJOCTET(value) (value) 10336a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 10436a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#else /* not HAVE_UNSIGNED_CHAR */ 10536a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 10636a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lanetypedef char JOCTET; 1070ca44258fc43bc44ea31b875001311591cc5634cConstantin Kaplinsky#ifdef __CHAR_UNSIGNED__ 10836a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#define GETJOCTET(value) (value) 10936a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#else 11036a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#define GETJOCTET(value) ((value) & 0xFF) 1110ca44258fc43bc44ea31b875001311591cc5634cConstantin Kaplinsky#endif /* __CHAR_UNSIGNED__ */ 11236a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 11336a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#endif /* HAVE_UNSIGNED_CHAR */ 11436a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 11536a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 11636a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane/* These typedefs are used for various table entries and so forth. 11736a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * They must be at least as wide as specified; but making them too big 11836a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * won't cost a huge amount of memory, so we don't provide special 11936a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * extraction code like we did for JSAMPLE. (In other words, these 12036a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * typedefs live at a different point on the speed/space tradeoff curve.) 12136a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane */ 12236a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 12336a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane/* UINT8 must hold at least the values 0..255. */ 12436a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 12536a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#ifdef HAVE_UNSIGNED_CHAR 12636a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lanetypedef unsigned char UINT8; 12736a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#else /* not HAVE_UNSIGNED_CHAR */ 1280ca44258fc43bc44ea31b875001311591cc5634cConstantin Kaplinsky#ifdef __CHAR_UNSIGNED__ 12936a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lanetypedef char UINT8; 1300ca44258fc43bc44ea31b875001311591cc5634cConstantin Kaplinsky#else /* not __CHAR_UNSIGNED__ */ 13136a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lanetypedef short UINT8; 1320ca44258fc43bc44ea31b875001311591cc5634cConstantin Kaplinsky#endif /* __CHAR_UNSIGNED__ */ 13336a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#endif /* HAVE_UNSIGNED_CHAR */ 13436a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 13536a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane/* UINT16 must hold at least the values 0..65535. */ 13636a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 13736a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#ifdef HAVE_UNSIGNED_SHORT 13836a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lanetypedef unsigned short UINT16; 13936a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#else /* not HAVE_UNSIGNED_SHORT */ 14036a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lanetypedef unsigned int UINT16; 14136a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#endif /* HAVE_UNSIGNED_SHORT */ 14236a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 14336a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane/* INT16 must hold at least the values -32768..32767. */ 14436a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 145e5eaf37440b8e337ab150c017df7c03faf846c51DRC#ifndef XMD_H /* X11/xmd.h correctly defines INT16 */ 14636a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lanetypedef short INT16; 14736a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#endif 14836a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 14936a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane/* INT32 must hold at least signed 32-bit values. */ 15036a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 151e5eaf37440b8e337ab150c017df7c03faf846c51DRC#ifndef XMD_H /* X11/xmd.h correctly defines INT32 */ 1525996a25e2f50d20d6a8f09830724035b49c3927bGuido Vollbeding#ifndef _BASETSD_H_ /* Microsoft defines it in basetsd.h */ 153989630f70cf1af69ebfefca8910d1647bf189712Guido Vollbeding#ifndef _BASETSD_H /* MinGW is slightly different */ 1545996a25e2f50d20d6a8f09830724035b49c3927bGuido Vollbeding#ifndef QGLOBAL_H /* Qt defines it in qglobal.h */ 1558e9cef2e6f5156c4b055a04a8f979b7291fc6b7aDRC#define __INT32_IS_ACTUALLY_LONG 15636a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lanetypedef long INT32; 15736a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#endif 1585996a25e2f50d20d6a8f09830724035b49c3927bGuido Vollbeding#endif 1595996a25e2f50d20d6a8f09830724035b49c3927bGuido Vollbeding#endif 160989630f70cf1af69ebfefca8910d1647bf189712Guido Vollbeding#endif 16136a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 16236a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane/* Datatype used for image dimensions. The JPEG standard only supports 16336a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * images up to 64K*64K due to 16-bit fields in SOF markers. Therefore 16436a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * "unsigned int" is sufficient on all machines. However, if you need to 16536a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * handle larger images and you don't mind deviating from the spec, you 166498d9bc92fcf39124b6f08e57326944dedd2ddd6Chandler Carruth * can change this datatype. (Note that changing this datatype will 167498d9bc92fcf39124b6f08e57326944dedd2ddd6Chandler Carruth * potentially require modifying the SIMD code. The x86-64 SIMD extensions, 168498d9bc92fcf39124b6f08e57326944dedd2ddd6Chandler Carruth * in particular, assume a 32-bit JDIMENSION.) 16936a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane */ 17036a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 17136a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lanetypedef unsigned int JDIMENSION; 17236a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 17336a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#define JPEG_MAX_DIMENSION 65500L /* a tad under 64K to prevent overflows */ 17436a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 17536a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 176489583f5165e05d37302e8eeec58104ea0109127Thomas G. Lane/* These macros are used in all function definitions and extern declarations. 177489583f5165e05d37302e8eeec58104ea0109127Thomas G. Lane * You could modify them if you need to change function linkage conventions; 178489583f5165e05d37302e8eeec58104ea0109127Thomas G. Lane * in particular, you'll need to do that to make the library a Windows DLL. 17936a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * Another application is to make all functions global for use with debuggers 18036a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * or code profilers that require it. 18136a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane */ 18236a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 183489583f5165e05d37302e8eeec58104ea0109127Thomas G. Lane/* a function called through method pointers: */ 184e5eaf37440b8e337ab150c017df7c03faf846c51DRC#define METHODDEF(type) static type 185489583f5165e05d37302e8eeec58104ea0109127Thomas G. Lane/* a function used only in its module: */ 186e5eaf37440b8e337ab150c017df7c03faf846c51DRC#define LOCAL(type) static type 187489583f5165e05d37302e8eeec58104ea0109127Thomas G. Lane/* a function referenced thru EXTERNs: */ 188e5eaf37440b8e337ab150c017df7c03faf846c51DRC#define GLOBAL(type) type 189489583f5165e05d37302e8eeec58104ea0109127Thomas G. Lane/* a reference to a GLOBAL function: */ 190e5eaf37440b8e337ab150c017df7c03faf846c51DRC#define EXTERN(type) extern type 191489583f5165e05d37302e8eeec58104ea0109127Thomas G. Lane 192489583f5165e05d37302e8eeec58104ea0109127Thomas G. Lane 193e2dd3e3e5cb479f8596325e72f0595a31bf79921DRC/* Originally, this macro was used as a way of defining function prototypes 194e2dd3e3e5cb479f8596325e72f0595a31bf79921DRC * for both modern compilers as well as older compilers that did not support 1952a6b8316fce86aa05c00bf44a29a28d2e9aec99cDRC * prototype parameters. libjpeg-turbo has never supported these older, 1962a6b8316fce86aa05c00bf44a29a28d2e9aec99cDRC * non-ANSI compilers, but the macro is still included because there is some 1972a6b8316fce86aa05c00bf44a29a28d2e9aec99cDRC * software out there that uses it. 198e2dd3e3e5cb479f8596325e72f0595a31bf79921DRC */ 199e2dd3e3e5cb479f8596325e72f0595a31bf79921DRC 200e2dd3e3e5cb479f8596325e72f0595a31bf79921DRC#define JMETHOD(type,methodname,arglist) type (*methodname) arglist 201e2dd3e3e5cb479f8596325e72f0595a31bf79921DRC 202e2dd3e3e5cb479f8596325e72f0595a31bf79921DRC 2032a6b8316fce86aa05c00bf44a29a28d2e9aec99cDRC/* libjpeg-turbo no longer supports platforms that have far symbols (MS-DOS), 2042a6b8316fce86aa05c00bf44a29a28d2e9aec99cDRC * but again, some software relies on this macro. 2052a6b8316fce86aa05c00bf44a29a28d2e9aec99cDRC */ 2062a6b8316fce86aa05c00bf44a29a28d2e9aec99cDRC 2072a6b8316fce86aa05c00bf44a29a28d2e9aec99cDRC#undef FAR 2082a6b8316fce86aa05c00bf44a29a28d2e9aec99cDRC#define FAR 2092a6b8316fce86aa05c00bf44a29a28d2e9aec99cDRC 2102a6b8316fce86aa05c00bf44a29a28d2e9aec99cDRC 21136a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane/* 21236a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * On a few systems, type boolean and/or its values FALSE, TRUE may appear 21336a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * in standard header files. Or you may have conflicts with application- 21436a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * specific header files that you want to include together with these files. 21536a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * Defining HAVE_BOOLEAN before including jpeglib.h should make it work. 21636a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane */ 21736a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 21836a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#ifndef HAVE_BOOLEAN 21936a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lanetypedef int boolean; 22036a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#endif 221e5eaf37440b8e337ab150c017df7c03faf846c51DRC#ifndef FALSE /* in case these macros already exist */ 222e5eaf37440b8e337ab150c017df7c03faf846c51DRC#define FALSE 0 /* values of boolean */ 22336a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#endif 22436a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#ifndef TRUE 225e5eaf37440b8e337ab150c017df7c03faf846c51DRC#define TRUE 1 22636a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#endif 22736a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 22836a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 22936a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane/* 23036a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * The remaining options affect code selection within the JPEG library, 23136a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * but they don't need to be visible to most applications using the library. 23236a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * To minimize application namespace pollution, the symbols won't be 23336a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * defined unless JPEG_INTERNALS or JPEG_INTERNAL_OPTIONS has been defined. 23436a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane */ 23536a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 23636a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#ifdef JPEG_INTERNALS 23736a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#define JPEG_INTERNAL_OPTIONS 23836a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#endif 23936a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 24036a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#ifdef JPEG_INTERNAL_OPTIONS 24136a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 24236a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 24336a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane/* 24436a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * These defines indicate whether to include various optional functions. 24536a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * Undefining some of these symbols will produce a smaller but less capable 24636a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * library. Note that you can leave certain source files out of the 24736a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * compilation/linking process if you've #undef'd the corresponding symbols. 24836a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * (You may HAVE to do that if your compiler doesn't like null source files.) 24936a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane */ 25036a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 25136a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane/* Capability options common to encoder and decoder: */ 25236a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 253e5eaf37440b8e337ab150c017df7c03faf846c51DRC#define DCT_ISLOW_SUPPORTED /* slow but accurate integer algorithm */ 254e5eaf37440b8e337ab150c017df7c03faf846c51DRC#define DCT_IFAST_SUPPORTED /* faster, less accurate integer method */ 255e5eaf37440b8e337ab150c017df7c03faf846c51DRC#define DCT_FLOAT_SUPPORTED /* floating-point: accurate, fast on fast HW */ 25636a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 25736a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane/* Encoder capability options: */ 25836a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 259bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane#define C_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */ 260e5eaf37440b8e337ab150c017df7c03faf846c51DRC#define C_PROGRESSIVE_SUPPORTED /* Progressive JPEG? (Requires MULTISCAN)*/ 261e5eaf37440b8e337ab150c017df7c03faf846c51DRC#define ENTROPY_OPT_SUPPORTED /* Optimization of entropy coding parms? */ 26236a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane/* Note: if you selected 12-bit data precision, it is dangerous to turn off 26336a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * ENTROPY_OPT_SUPPORTED. The standard Huffman tables are only good for 8-bit 26436a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * precision, so jchuff.c normally uses entropy optimization to compute 26536a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * usable tables for higher precision. If you don't want to do optimization, 26636a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * you'll have to supply different default Huffman tables. 267bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * The exact same statements apply for progressive JPEG: the default tables 268bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * don't work for progressive mode. (This may get fixed, however.) 26936a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane */ 27036a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#define INPUT_SMOOTHING_SUPPORTED /* Input image smoothing option? */ 27136a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 27236a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane/* Decoder capability options: */ 27336a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 27436a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#define D_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */ 275e5eaf37440b8e337ab150c017df7c03faf846c51DRC#define D_PROGRESSIVE_SUPPORTED /* Progressive JPEG? (Requires MULTISCAN)*/ 276e5eaf37440b8e337ab150c017df7c03faf846c51DRC#define SAVE_MARKERS_SUPPORTED /* jpeg_save_markers() needed? */ 277bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane#define BLOCK_SMOOTHING_SUPPORTED /* Block smoothing? (Progressive only) */ 278e5eaf37440b8e337ab150c017df7c03faf846c51DRC#define IDCT_SCALING_SUPPORTED /* Output rescaling via IDCT? */ 27936a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#undef UPSAMPLE_SCALING_SUPPORTED /* Output rescaling at upsample stage? */ 28036a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#define UPSAMPLE_MERGING_SUPPORTED /* Fast path for sloppy upsampling? */ 281e5eaf37440b8e337ab150c017df7c03faf846c51DRC#define QUANT_1PASS_SUPPORTED /* 1-pass color quantization? */ 282e5eaf37440b8e337ab150c017df7c03faf846c51DRC#define QUANT_2PASS_SUPPORTED /* 2-pass color quantization? */ 28336a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 28436a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane/* more capability options later, no doubt */ 28536a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 28636a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 28736a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane/* 288976fd9687e5773f3653385da7a3489ce4d58dd51DRC * The RGB_RED, RGB_GREEN, RGB_BLUE, and RGB_PIXELSIZE macros are a vestigial 289976fd9687e5773f3653385da7a3489ce4d58dd51DRC * feature of libjpeg. The idea was that, if an application developer needed 290976fd9687e5773f3653385da7a3489ce4d58dd51DRC * to compress from/decompress to a BGR/BGRX/RGBX/XBGR/XRGB buffer, they could 291976fd9687e5773f3653385da7a3489ce4d58dd51DRC * change these macros, rebuild libjpeg, and link their application statically 292976fd9687e5773f3653385da7a3489ce4d58dd51DRC * with it. In reality, few people ever did this, because there were some 293976fd9687e5773f3653385da7a3489ce4d58dd51DRC * severe restrictions involved (cjpeg and djpeg no longer worked properly, 294976fd9687e5773f3653385da7a3489ce4d58dd51DRC * compressing/decompressing RGB JPEGs no longer worked properly, and the color 295976fd9687e5773f3653385da7a3489ce4d58dd51DRC * quantizer wouldn't work with pixel sizes other than 3.) Further, since all 296976fd9687e5773f3653385da7a3489ce4d58dd51DRC * of the O/S-supplied versions of libjpeg were built with the default values 297976fd9687e5773f3653385da7a3489ce4d58dd51DRC * of RGB_RED, RGB_GREEN, RGB_BLUE, and RGB_PIXELSIZE, many applications have 298976fd9687e5773f3653385da7a3489ce4d58dd51DRC * come to regard these values as immutable. 299976fd9687e5773f3653385da7a3489ce4d58dd51DRC * 300976fd9687e5773f3653385da7a3489ce4d58dd51DRC * The libjpeg-turbo colorspace extensions provide a much cleaner way of 301976fd9687e5773f3653385da7a3489ce4d58dd51DRC * compressing from/decompressing to buffers with arbitrary component orders 302976fd9687e5773f3653385da7a3489ce4d58dd51DRC * and pixel sizes. Thus, we do not support changing the values of RGB_RED, 303976fd9687e5773f3653385da7a3489ce4d58dd51DRC * RGB_GREEN, RGB_BLUE, or RGB_PIXELSIZE. In addition to the restrictions 304976fd9687e5773f3653385da7a3489ce4d58dd51DRC * listed above, changing these values will also break the SIMD extensions and 305976fd9687e5773f3653385da7a3489ce4d58dd51DRC * the regression tests. 30636a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane */ 30736a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 308e5eaf37440b8e337ab150c017df7c03faf846c51DRC#define RGB_RED 0 /* Offset of Red in an RGB scanline element */ 309e5eaf37440b8e337ab150c017df7c03faf846c51DRC#define RGB_GREEN 1 /* Offset of Green */ 310e5eaf37440b8e337ab150c017df7c03faf846c51DRC#define RGB_BLUE 2 /* Offset of Blue */ 311e5eaf37440b8e337ab150c017df7c03faf846c51DRC#define RGB_PIXELSIZE 3 /* JSAMPLEs per RGB scanline element */ 31236a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 31378df2e6115b0e579432d01cb034132cd4402a1baDRC#define JPEG_NUMCS 17 314f25c071eb745268452206bb633561b770c4d62eaDRC 315b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC#define EXT_RGB_RED 0 316b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC#define EXT_RGB_GREEN 1 317b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC#define EXT_RGB_BLUE 2 318b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC#define EXT_RGB_PIXELSIZE 3 319b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC 320b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC#define EXT_RGBX_RED 0 321b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC#define EXT_RGBX_GREEN 1 322b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC#define EXT_RGBX_BLUE 2 323b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC#define EXT_RGBX_PIXELSIZE 4 324b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC 325b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC#define EXT_BGR_RED 2 326b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC#define EXT_BGR_GREEN 1 327b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC#define EXT_BGR_BLUE 0 328b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC#define EXT_BGR_PIXELSIZE 3 329b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC 330b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC#define EXT_BGRX_RED 2 331b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC#define EXT_BGRX_GREEN 1 332b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC#define EXT_BGRX_BLUE 0 333b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC#define EXT_BGRX_PIXELSIZE 4 334b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC 335b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC#define EXT_XBGR_RED 3 336b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC#define EXT_XBGR_GREEN 2 337b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC#define EXT_XBGR_BLUE 1 338b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC#define EXT_XBGR_PIXELSIZE 4 339b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC 340b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC#define EXT_XRGB_RED 1 341b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC#define EXT_XRGB_GREEN 2 342b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC#define EXT_XRGB_BLUE 3 343b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC#define EXT_XRGB_PIXELSIZE 4 344b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC 345f25c071eb745268452206bb633561b770c4d62eaDRCstatic const int rgb_red[JPEG_NUMCS] = { 346b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC -1, -1, RGB_RED, -1, -1, -1, EXT_RGB_RED, EXT_RGBX_RED, 34767ce3b2352fe1f7511edbfed74ec6960e41e97dcDRC EXT_BGR_RED, EXT_BGRX_RED, EXT_XBGR_RED, EXT_XRGB_RED, 34878df2e6115b0e579432d01cb034132cd4402a1baDRC EXT_RGBX_RED, EXT_BGRX_RED, EXT_XBGR_RED, EXT_XRGB_RED, 34978df2e6115b0e579432d01cb034132cd4402a1baDRC -1 350f25c071eb745268452206bb633561b770c4d62eaDRC}; 351f25c071eb745268452206bb633561b770c4d62eaDRC 352f25c071eb745268452206bb633561b770c4d62eaDRCstatic const int rgb_green[JPEG_NUMCS] = { 353b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC -1, -1, RGB_GREEN, -1, -1, -1, EXT_RGB_GREEN, EXT_RGBX_GREEN, 35467ce3b2352fe1f7511edbfed74ec6960e41e97dcDRC EXT_BGR_GREEN, EXT_BGRX_GREEN, EXT_XBGR_GREEN, EXT_XRGB_GREEN, 35578df2e6115b0e579432d01cb034132cd4402a1baDRC EXT_RGBX_GREEN, EXT_BGRX_GREEN, EXT_XBGR_GREEN, EXT_XRGB_GREEN, 35678df2e6115b0e579432d01cb034132cd4402a1baDRC -1 357f25c071eb745268452206bb633561b770c4d62eaDRC}; 358f25c071eb745268452206bb633561b770c4d62eaDRC 359f25c071eb745268452206bb633561b770c4d62eaDRCstatic const int rgb_blue[JPEG_NUMCS] = { 360b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC -1, -1, RGB_BLUE, -1, -1, -1, EXT_RGB_BLUE, EXT_RGBX_BLUE, 36167ce3b2352fe1f7511edbfed74ec6960e41e97dcDRC EXT_BGR_BLUE, EXT_BGRX_BLUE, EXT_XBGR_BLUE, EXT_XRGB_BLUE, 36278df2e6115b0e579432d01cb034132cd4402a1baDRC EXT_RGBX_BLUE, EXT_BGRX_BLUE, EXT_XBGR_BLUE, EXT_XRGB_BLUE, 36378df2e6115b0e579432d01cb034132cd4402a1baDRC -1 364f25c071eb745268452206bb633561b770c4d62eaDRC}; 365f25c071eb745268452206bb633561b770c4d62eaDRC 366f25c071eb745268452206bb633561b770c4d62eaDRCstatic const int rgb_pixelsize[JPEG_NUMCS] = { 367b4570bbf8cb3045e2b3cbf3d6a80d31735871d10DRC -1, -1, RGB_PIXELSIZE, -1, -1, -1, EXT_RGB_PIXELSIZE, EXT_RGBX_PIXELSIZE, 36867ce3b2352fe1f7511edbfed74ec6960e41e97dcDRC EXT_BGR_PIXELSIZE, EXT_BGRX_PIXELSIZE, EXT_XBGR_PIXELSIZE, EXT_XRGB_PIXELSIZE, 36978df2e6115b0e579432d01cb034132cd4402a1baDRC EXT_RGBX_PIXELSIZE, EXT_BGRX_PIXELSIZE, EXT_XBGR_PIXELSIZE, EXT_XRGB_PIXELSIZE, 37078df2e6115b0e579432d01cb034132cd4402a1baDRC -1 371f25c071eb745268452206bb633561b770c4d62eaDRC}; 37236a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 37336a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane/* Definitions for speed-related optimizations. */ 37436a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 37536a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane/* On some machines (notably 68000 series) "int" is 32 bits, but multiplying 37636a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * two 16-bit shorts is faster than multiplying two ints. Define MULTIPLIER 37736a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * as short on such a machine. MULTIPLIER must be at least 16 bits wide. 37836a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane */ 37936a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 38036a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#ifndef MULTIPLIER 3815eb84ff97f00c02aadfdce0cb30ab3e899c1b113Pierre Ossman#ifndef WITH_SIMD 382e5eaf37440b8e337ab150c017df7c03faf846c51DRC#define MULTIPLIER int /* type for fastest integer multiply */ 3835eb84ff97f00c02aadfdce0cb30ab3e899c1b113Pierre Ossman#else 3845eb84ff97f00c02aadfdce0cb30ab3e899c1b113Pierre Ossman#define MULTIPLIER short /* prefer 16-bit with SIMD for parellelism */ 3855eb84ff97f00c02aadfdce0cb30ab3e899c1b113Pierre Ossman#endif 38636a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#endif 38736a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 38836a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 38936a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane/* FAST_FLOAT should be either float or double, whichever is done faster 39036a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * by your compiler. (Note that this type is only used in the floating point 39136a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane * DCT routines, so it only matters if you've defined DCT_FLOAT_SUPPORTED.) 39236a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane */ 39336a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 39436a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#ifndef FAST_FLOAT 39536a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#define FAST_FLOAT float 39636a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#endif 39736a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane 39836a4ccccd33f5cc9df62949554af87129ced7f84Thomas G. Lane#endif /* JPEG_INTERNAL_OPTIONS */ 399