1ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 2ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * jmorecfg.h 3ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 4ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Copyright (C) 1991-1997, Thomas G. Lane. 5ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * This file is part of the Independent JPEG Group's software. 6ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * For conditions of distribution and use, see the accompanying README file. 7ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 8ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * This file contains additional configuration options that customize the 9ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * JPEG software for special applications or support machine-dependent 10ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * optimizations. Most users will not need to touch this file. 11ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 12ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 13ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef _MSC_VER 14ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#pragma warning (disable : 4142) 15ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif 16ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 17ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 18ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Define BITS_IN_JSAMPLE as either 19ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 8 for 8-bit sample values (the usual setting) 20ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 12 for 12-bit sample values 21ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Only 8 and 12 are legal data precisions for lossy JPEG according to the 22ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * JPEG standard, and the IJG code does not support anything else! 23ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * We do not support run-time selection of data precision, sorry. 24ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 25ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 26ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define BITS_IN_JSAMPLE 8 /* use 8 or 12 */ 27ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 28ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 29ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 30ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Maximum number of components (color channels) allowed in JPEG image. 31ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * To meet the letter of the JPEG spec, set this to 255. However, darn 32ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * few applications need more than 4 channels (maybe 5 for CMYK + alpha 33ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * mask). We recommend 10 as a reasonable compromise; use 4 if you are 34ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * really short on memory. (Each allowed component costs a hundred or so 35ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * bytes of storage, whether actually used in an image or not.) 36ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 37ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 38ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define MAX_COMPONENTS 10 /* maximum number of image components */ 39ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 40ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 41ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 42ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Basic data types. 43ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * You may need to change these if you have a machine with unusual data 44ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * type sizes; for example, "char" not 8 bits, "short" not 16 bits, 45ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * or "long" not 32 bits. We don't care whether "int" is 16 or 32 bits, 46ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * but it had better be at least 16. 47ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 48ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 49ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Representation of a single sample (pixel element value). 50ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * We frequently allocate large arrays of these, so it's important to keep 51ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * them small. But if you have memory to burn and access to char or short 52ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * arrays is very slow on your hardware, you might want to change these. 53ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 54ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 55ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#if BITS_IN_JSAMPLE == 8 56ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* JSAMPLE should be the smallest type that will hold the values 0..255. 57ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * You can use a signed char by having GETJSAMPLE mask it with 0xFF. 58ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 59ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 60ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef HAVE_UNSIGNED_CHAR 61ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 62ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovtypedef unsigned char JSAMPLE; 63ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define GETJSAMPLE(value) ((int) (value)) 64ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 65ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#else /* not HAVE_UNSIGNED_CHAR */ 66ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 67ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovtypedef char JSAMPLE; 68ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef CHAR_IS_UNSIGNED 69ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define GETJSAMPLE(value) ((int) (value)) 70ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#else 71ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define GETJSAMPLE(value) ((int) (value) & 0xFF) 72ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif /* CHAR_IS_UNSIGNED */ 73ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 74ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif /* HAVE_UNSIGNED_CHAR */ 75ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 76ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define MAXJSAMPLE 255 77ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define CENTERJSAMPLE 128 78ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 79ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif /* BITS_IN_JSAMPLE == 8 */ 80ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 81ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 82ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#if BITS_IN_JSAMPLE == 12 83ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* JSAMPLE should be the smallest type that will hold the values 0..4095. 84ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * On nearly all machines "short" will do nicely. 85ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 86ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 87ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovtypedef short JSAMPLE; 88ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define GETJSAMPLE(value) ((int) (value)) 89ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 90ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define MAXJSAMPLE 4095 91ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define CENTERJSAMPLE 2048 92ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 93ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif /* BITS_IN_JSAMPLE == 12 */ 94ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 95ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 96ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Representation of a DCT frequency coefficient. 97ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * This should be a signed value of at least 16 bits; "short" is usually OK. 98ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Again, we allocate large arrays of these, but you can change to int 99ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * if you have memory to burn and "short" is really slow. 100ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 101ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 102ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovtypedef short JCOEF; 103ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 104ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 105ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Compressed datastreams are represented as arrays of JOCTET. 106ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * These must be EXACTLY 8 bits wide, at least once they are written to 107ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * external storage. Note that when using the stdio data source/destination 108ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * managers, this is also the data type passed to fread/fwrite. 109ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 110ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 111ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef HAVE_UNSIGNED_CHAR 112ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 113ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovtypedef unsigned char JOCTET; 114ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define GETJOCTET(value) (value) 115ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 116ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#else /* not HAVE_UNSIGNED_CHAR */ 117ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 118ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovtypedef char JOCTET; 119ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef CHAR_IS_UNSIGNED 120ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define GETJOCTET(value) (value) 121ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#else 122ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define GETJOCTET(value) ((value) & 0xFF) 123ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif /* CHAR_IS_UNSIGNED */ 124ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 125ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif /* HAVE_UNSIGNED_CHAR */ 126ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 127ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 128ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* These typedefs are used for various table entries and so forth. 129ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * They must be at least as wide as specified; but making them too big 130ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * won't cost a huge amount of memory, so we don't provide special 131ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * extraction code like we did for JSAMPLE. (In other words, these 132ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * typedefs live at a different point on the speed/space tradeoff curve.) 133ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 134ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 135ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#if _FX_OS_ != _FX_VXWORKS_ 136ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 137ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* UINT8 must hold at least the values 0..255. */ 138ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 139ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef HAVE_UNSIGNED_CHAR 140ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovtypedef unsigned char UINT8; 141ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#else /* not HAVE_UNSIGNED_CHAR */ 142ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef CHAR_IS_UNSIGNED 143ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovtypedef char UINT8; 144ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#else /* not CHAR_IS_UNSIGNED */ 145ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovtypedef short UINT8; 146ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif /* CHAR_IS_UNSIGNED */ 147ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif /* HAVE_UNSIGNED_CHAR */ 148ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 149ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 150ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* UINT16 must hold at least the values 0..65535. */ 151ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 152ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef HAVE_UNSIGNED_SHORT 153ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovtypedef unsigned short UINT16; 154ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#else /* not HAVE_UNSIGNED_SHORT */ 155ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovtypedef unsigned int UINT16; 156ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif /* HAVE_UNSIGNED_SHORT */ 157ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 158ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* INT16 must hold at least the values -32768..32767. */ 159ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 160ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifndef XMD_H /* X11/xmd.h correctly defines INT16 */ 161ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovtypedef short INT16; 162ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif 163ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 164ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* INT32 must hold at least signed 32-bit values. */ 165ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 166ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifndef XMD_H /* X11/xmd.h correctly defines INT32 */ 167ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovtypedef int INT32; 168ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif 169ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 170ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif 171ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 172ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Datatype used for image dimensions. The JPEG standard only supports 173ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * images up to 64K*64K due to 16-bit fields in SOF markers. Therefore 174ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * "unsigned int" is sufficient on all machines. However, if you need to 175ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * handle larger images and you don't mind deviating from the spec, you 176ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * can change this datatype. 177ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 178ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 179ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovtypedef unsigned int JDIMENSION; 180ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 181ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define JPEG_MAX_DIMENSION 65500L /* a tad under 64K to prevent overflows */ 182ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 183ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 184ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* These macros are used in all function definitions and extern declarations. 185ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * You could modify them if you need to change function linkage conventions; 186ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * in particular, you'll need to do that to make the library a Windows DLL. 187ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Another application is to make all functions global for use with debuggers 188ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * or code profilers that require it. 189ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 190ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 191ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* a function called through method pointers: */ 192ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define METHODDEF(type) static type 193ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* a function used only in its module: */ 194ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define LOCAL(type) static type 195ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* a function referenced thru EXTERNs: */ 196ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define GLOBAL(type) type 197ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 198ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef _FX_MANAGED_CODE_ 199ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define EXTERN(type) extern "C" type 200ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#else 201ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* a reference to a GLOBAL function: */ 202ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define EXTERN(type) extern type 203ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif 204ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 205ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 206ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* This macro is used to declare a "method", that is, a function pointer. 207ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * We want to supply prototype parameters if the compiler can cope. 208ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Note that the arglist parameter must be parenthesized! 209ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Again, you can customize this if you need special linkage keywords. 210ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 211ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 212ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef HAVE_PROTOTYPES 213ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define JMETHOD(type,methodname,arglist) type (*methodname) arglist 214ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#else 215ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define JMETHOD(type,methodname,arglist) type (*methodname) () 216ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif 217ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 218ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 219ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Here is the pseudo-keyword for declaring pointers that must be "far" 220ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * on 80x86 machines. Most of the specialized coding for 80x86 is handled 221ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * by just saying "FAR *" where such a pointer is needed. In a few places 222ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * explicit coding is needed; see uses of the NEED_FAR_POINTERS symbol. 223ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 224ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 225ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef NEED_FAR_POINTERS 226ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define FAR far 227ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#else 228ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov//#define FAR 229ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif 230ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 231ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 232ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 233ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * On a few systems, type boolean and/or its values FALSE, TRUE may appear 234ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * in standard header files. Or you may have conflicts with application- 235ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * specific header files that you want to include together with these files. 236ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Defining HAVE_BOOLEAN before including jpeglib.h should make it work. 237ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 238ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 239ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifndef HAVE_BOOLEAN 240ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovtypedef int boolean; 241ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif 242ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifndef FALSE /* in case these macros already exist */ 243ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define FALSE 0 /* values of boolean */ 244ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif 245ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifndef TRUE 246ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define TRUE 1 247ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif 248ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 249ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 250ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 251ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * The remaining options affect code selection within the JPEG library, 252ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * but they don't need to be visible to most applications using the library. 253ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * To minimize application namespace pollution, the symbols won't be 254ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * defined unless JPEG_INTERNALS or JPEG_INTERNAL_OPTIONS has been defined. 255ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 256ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 257ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef JPEG_INTERNALS 258ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define JPEG_INTERNAL_OPTIONS 259ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif 260ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 261ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef JPEG_INTERNAL_OPTIONS 262ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 263ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 264ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 265ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * These defines indicate whether to include various optional functions. 266ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Undefining some of these symbols will produce a smaller but less capable 267ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * library. Note that you can leave certain source files out of the 268ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * compilation/linking process if you've #undef'd the corresponding symbols. 269ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * (You may HAVE to do that if your compiler doesn't like null source files.) 270ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 271ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 272ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Arithmetic coding is unsupported for legal reasons. Complaints to IBM. */ 273ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 274ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Capability options common to encoder and decoder: */ 275ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 276ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define DCT_ISLOW_SUPPORTED /* slow but accurate integer algorithm */ 277ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define DCT_IFAST_SUPPORTED /* faster, less accurate integer method */ 278ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#undef DCT_FLOAT_SUPPORTED /* floating-point: accurate, fast on fast HW */ 279ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 280ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Encoder capability options: */ 281ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 282ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#undef C_ARITH_CODING_SUPPORTED /* Arithmetic coding back end? */ 283ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define C_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */ 284ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define C_PROGRESSIVE_SUPPORTED /* Progressive JPEG? (Requires MULTISCAN)*/ 285ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define ENTROPY_OPT_SUPPORTED /* Optimization of entropy coding parms? */ 286ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Note: if you selected 12-bit data precision, it is dangerous to turn off 287ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * ENTROPY_OPT_SUPPORTED. The standard Huffman tables are only good for 8-bit 288ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * precision, so jchuff.c normally uses entropy optimization to compute 289ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * usable tables for higher precision. If you don't want to do optimization, 290ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * you'll have to supply different default Huffman tables. 291ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * The exact same statements apply for progressive JPEG: the default tables 292ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * don't work for progressive mode. (This may get fixed, however.) 293ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 294ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define INPUT_SMOOTHING_SUPPORTED /* Input image smoothing option? */ 295ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 296ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Decoder capability options: */ 297ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 298ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#undef D_ARITH_CODING_SUPPORTED /* Arithmetic coding back end? */ 299ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define D_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */ 300ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define D_PROGRESSIVE_SUPPORTED /* Progressive JPEG? (Requires MULTISCAN)*/ 301ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define SAVE_MARKERS_SUPPORTED /* jpeg_save_markers() needed? */ 302ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define BLOCK_SMOOTHING_SUPPORTED /* Block smoothing? (Progressive only) */ 303ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define IDCT_SCALING_SUPPORTED /* Output rescaling via IDCT? */ 304ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#undef UPSAMPLE_SCALING_SUPPORTED /* Output rescaling at upsample stage? */ 305ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define UPSAMPLE_MERGING_SUPPORTED /* Fast path for sloppy upsampling? */ 306ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#undef QUANT_1PASS_SUPPORTED /* 1-pass color quantization? */ 307ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#undef QUANT_2PASS_SUPPORTED /* 2-pass color quantization? */ 308ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 309ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* more capability options later, no doubt */ 310ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 311ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 312ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 313ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Ordering of RGB data in scanlines passed to or from the application. 314ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * If your application wants to deal with data in the order B,G,R, just 315ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * change these macros. You can also deal with formats such as R,G,B,X 316ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * (one extra byte per pixel) by changing RGB_PIXELSIZE. Note that changing 317ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * the offsets will also change the order in which colormap data is organized. 318ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * RESTRICTIONS: 319ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 1. The sample applications cjpeg,djpeg do NOT support modified RGB formats. 320ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 2. These macros only affect RGB<=>YCbCr color conversion, so they are not 321ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * useful if you are using JPEG color spaces other than YCbCr or grayscale. 322ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 3. The color quantizer modules will not behave desirably if RGB_PIXELSIZE 323ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * is not 3 (they don't understand about dummy color components!). So you 324ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * can't use color quantization if you change that value. 325ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 326ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 327ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define RGB_RED 0 /* Offset of Red in an RGB scanline element */ 328ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define RGB_GREEN 1 /* Offset of Green */ 329ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define RGB_BLUE 2 /* Offset of Blue */ 330ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define RGB_PIXELSIZE 3 /* JSAMPLEs per RGB scanline element */ 331ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 332ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 333ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Definitions for speed-related optimizations. */ 334ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 335ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 336ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* If your compiler supports inline functions, define INLINE 337ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * as the inline keyword; otherwise define it as empty. 338ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 339ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 340ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifndef INLINE 341ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef __GNUC__ /* for instance, GNU C knows about inline */ 342ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define INLINE __inline__ 343ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif 344ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifndef INLINE 345ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define INLINE /* default is to define it as empty */ 346ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif 347ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif 348ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 349ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 350ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* On some machines (notably 68000 series) "int" is 32 bits, but multiplying 351ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * two 16-bit shorts is faster than multiplying two ints. Define MULTIPLIER 352ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * as short on such a machine. MULTIPLIER must be at least 16 bits wide. 353ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 354ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 355ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifndef MULTIPLIER 356ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define MULTIPLIER int /* type for fastest integer multiply */ 357ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif 358ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 359ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 360ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* FAST_FLOAT should be either float or double, whichever is done faster 361ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * by your compiler. (Note that this type is only used in the floating point 362ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * DCT routines, so it only matters if you've defined DCT_FLOAT_SUPPORTED.) 363ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Typically, float is faster in ANSI C compilers, while double is faster in 364ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * pre-ANSI compilers (because they insist on converting to double anyway). 365ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * The code below therefore chooses float if we have ANSI-style prototypes. 366ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 367ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 368ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifndef FAST_FLOAT 369ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef HAVE_PROTOTYPES 370ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define FAST_FLOAT float 371ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#else 372ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define FAST_FLOAT double 373ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif 374ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif 375ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 376ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif /* JPEG_INTERNAL_OPTIONS */ 377