Leaked source code of windows server 2003
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  1. /*
  2. * jmorecfg.h
  3. *
  4. * Copyright (C) 1991-1995, Thomas G. Lane.
  5. * This file is part of the Independent JPEG Group's software.
  6. * For conditions of distribution and use, see the accompanying README file.
  7. *
  8. * This file contains additional configuration options that customize the
  9. * JPEG software for special applications or support machine-dependent
  10. * optimizations. Most users will not need to touch this file.
  11. */
  12. /*
  13. * Define BITS_IN_JSAMPLE as either
  14. * 8 for 8-bit sample values (the usual setting)
  15. * 12 for 12-bit sample values
  16. * Only 8 and 12 are legal data precisions for lossy JPEG according to the
  17. * JPEG standard, and the IJG code does not support anything else!
  18. * We do not support run-time selection of data precision, sorry.
  19. */
  20. #define BITS_IN_JSAMPLE 8 /* use 8 or 12 */
  21. /*
  22. * Maximum number of components (color channels) allowed in JPEG image.
  23. * To meet the letter of the JPEG spec, set this to 255. However, darn
  24. * few applications need more than 4 channels (maybe 5 for CMYK + alpha
  25. * mask). We recommend 10 as a reasonable compromise; use 4 if you are
  26. * really short on memory. (Each allowed component costs a hundred or so
  27. * bytes of storage, whether actually used in an image or not.)
  28. */
  29. #define MAX_COMPONENTS 10 /* maximum number of image components */
  30. /*
  31. * Basic data types.
  32. * You may need to change these if you have a machine with unusual data
  33. * type sizes; for example, "char" not 8 bits, "short" not 16 bits,
  34. * or "long" not 32 bits. We don't care whether "int" is 16 or 32 bits,
  35. * but it had better be at least 16.
  36. */
  37. /* Representation of a single sample (pixel element value).
  38. * We frequently allocate large arrays of these, so it's important to keep
  39. * them small. But if you have memory to burn and access to char or short
  40. * arrays is very slow on your hardware, you might want to change these.
  41. */
  42. #if BITS_IN_JSAMPLE == 8
  43. /* JSAMPLE should be the smallest type that will hold the values 0..255.
  44. * You can use a signed char by having GETJSAMPLE mask it with 0xFF.
  45. */
  46. #ifdef HAVE_UNSIGNED_CHAR
  47. typedef unsigned char JSAMPLE;
  48. #define GETJSAMPLE(value) ((int) (value))
  49. #else /* not HAVE_UNSIGNED_CHAR */
  50. typedef char JSAMPLE;
  51. #ifdef CHAR_IS_UNSIGNED
  52. #define GETJSAMPLE(value) ((int) (value))
  53. #else
  54. #define GETJSAMPLE(value) ((int) (value) & 0xFF)
  55. #endif /* CHAR_IS_UNSIGNED */
  56. #endif /* HAVE_UNSIGNED_CHAR */
  57. #define MAXJSAMPLE 255
  58. #define CENTERJSAMPLE 128
  59. #endif /* BITS_IN_JSAMPLE == 8 */
  60. #if BITS_IN_JSAMPLE == 12
  61. /* JSAMPLE should be the smallest type that will hold the values 0..4095.
  62. * On nearly all machines "short" will do nicely.
  63. */
  64. typedef short JSAMPLE;
  65. #define GETJSAMPLE(value) ((int) (value))
  66. #define MAXJSAMPLE 4095
  67. #define CENTERJSAMPLE 2048
  68. #endif /* BITS_IN_JSAMPLE == 12 */
  69. /* Representation of a DCT frequency coefficient.
  70. * This should be a signed value of at least 16 bits; "short" is usually OK.
  71. * Again, we allocate large arrays of these, but you can change to int
  72. * if you have memory to burn and "short" is really slow.
  73. */
  74. typedef short JCOEF;
  75. /* Compressed datastreams are represented as arrays of JOCTET.
  76. * These must be EXACTLY 8 bits wide, at least once they are written to
  77. * external storage. Note that when using the stdio data source/destination
  78. * managers, this is also the data type passed to fread/fwrite.
  79. */
  80. #ifdef HAVE_UNSIGNED_CHAR
  81. typedef unsigned char JOCTET;
  82. #define GETJOCTET(value) (value)
  83. #else /* not HAVE_UNSIGNED_CHAR */
  84. typedef char JOCTET;
  85. #ifdef CHAR_IS_UNSIGNED
  86. #define GETJOCTET(value) (value)
  87. #else
  88. #define GETJOCTET(value) ((value) & 0xFF)
  89. #endif /* CHAR_IS_UNSIGNED */
  90. #endif /* HAVE_UNSIGNED_CHAR */
  91. /* These typedefs are used for various table entries and so forth.
  92. * They must be at least as wide as specified; but making them too big
  93. * won't cost a huge amount of memory, so we don't provide special
  94. * extraction code like we did for JSAMPLE. (In other words, these
  95. * typedefs live at a different point on the speed/space tradeoff curve.)
  96. */
  97. #ifndef _BASETSD_H_
  98. /* UINT8 must hold at least the values 0..255. */
  99. #ifdef HAVE_UNSIGNED_CHAR
  100. typedef unsigned char UINT8;
  101. #else /* not HAVE_UNSIGNED_CHAR */
  102. #ifdef CHAR_IS_UNSIGNED
  103. typedef char UINT8;
  104. #else /* not CHAR_IS_UNSIGNED */
  105. typedef short UINT8;
  106. #endif /* CHAR_IS_UNSIGNED */
  107. #endif /* HAVE_UNSIGNED_CHAR */
  108. /* UINT16 must hold at least the values 0..65535. */
  109. #ifdef HAVE_UNSIGNED_SHORT
  110. typedef unsigned short UINT16;
  111. #else /* not HAVE_UNSIGNED_SHORT */
  112. typedef unsigned int UINT16;
  113. #endif /* HAVE_UNSIGNED_SHORT */
  114. /* INT16 must hold at least the values -32768..32767. */
  115. #ifndef XMD_H /* X11/xmd.h correctly defines INT16 */
  116. typedef short INT16;
  117. #endif
  118. /* INT32 must hold at least signed 32-bit values. */
  119. #ifndef XMD_H /* X11/xmd.h correctly defines INT32 */
  120. //+MicrosoftNT
  121. //
  122. // This definition is incompatible with 64bit headers
  123. //
  124. #ifndef WINNT
  125. typedef long INT32;
  126. #else
  127. typedef int INT32;
  128. #endif
  129. #endif
  130. #endif
  131. /* Datatype used for image dimensions. The JPEG standard only supports
  132. * images up to 64K*64K due to 16-bit fields in SOF markers. Therefore
  133. * "unsigned int" is sufficient on all machines. However, if you need to
  134. * handle larger images and you don't mind deviating from the spec, you
  135. * can change this datatype.
  136. */
  137. typedef unsigned int JDIMENSION;
  138. #define JPEG_MAX_DIMENSION 65500L /* a tad under 64K to prevent overflows */
  139. /* These defines are used in all function definitions and extern declarations.
  140. * You could modify them if you need to change function linkage conventions.
  141. * Another application is to make all functions global for use with debuggers
  142. * or code profilers that require it.
  143. */
  144. #define METHODDEF static /* a function called through method pointers */
  145. #define LOCAL static /* a function used only in its module */
  146. #define GLOBAL /* a function referenced thru EXTERNs */
  147. #define EXTERN extern /* a reference to a GLOBAL function */
  148. /* Here is the pseudo-keyword for declaring pointers that must be "far"
  149. * on 80x86 machines. Most of the specialized coding for 80x86 is handled
  150. * by just saying "FAR *" where such a pointer is needed. In a few places
  151. * explicit coding is needed; see uses of the NEED_FAR_POINTERS symbol.
  152. */
  153. #ifdef NEED_FAR_POINTERS
  154. #ifndef FAR
  155. #define FAR far
  156. #endif
  157. #else
  158. #ifndef FAR
  159. #define FAR
  160. #endif
  161. #endif
  162. /*
  163. * On a few systems, type boolean and/or its values FALSE, TRUE may appear
  164. * in standard header files. Or you may have conflicts with application-
  165. * specific header files that you want to include together with these files.
  166. * Defining HAVE_BOOLEAN before including jpeglib.h should make it work.
  167. */
  168. #ifndef HAVE_BOOLEAN
  169. typedef int boolean;
  170. #endif
  171. #ifndef FALSE /* in case these macros already exist */
  172. #define FALSE 0 /* values of boolean */
  173. #endif
  174. #ifndef TRUE
  175. #define TRUE 1
  176. #endif
  177. /*
  178. * The remaining options affect code selection within the JPEG library,
  179. * but they don't need to be visible to most applications using the library.
  180. * To minimize application namespace pollution, the symbols won't be
  181. * defined unless JPEG_INTERNALS or JPEG_INTERNAL_OPTIONS has been defined.
  182. */
  183. #ifdef JPEG_INTERNALS
  184. #define JPEG_INTERNAL_OPTIONS
  185. #endif
  186. #ifdef JPEG_INTERNAL_OPTIONS
  187. /*
  188. * These defines indicate whether to include various optional functions.
  189. * Undefining some of these symbols will produce a smaller but less capable
  190. * library. Note that you can leave certain source files out of the
  191. * compilation/linking process if you've #undef'd the corresponding symbols.
  192. * (You may HAVE to do that if your compiler doesn't like null source files.)
  193. */
  194. /* Arithmetic coding is unsupported for legal reasons. Complaints to IBM. */
  195. /* Capability options common to encoder and decoder: */
  196. #define DCT_ISLOW_SUPPORTED /* slow but accurate integer algorithm */
  197. #define DCT_IFAST_SUPPORTED /* faster, less accurate integer method */
  198. #define DCT_FLOAT_SUPPORTED /* floating-point: accurate, fast on fast HW */
  199. /* Encoder capability options: */
  200. #undef C_ARITH_CODING_SUPPORTED /* Arithmetic coding back end? */
  201. #define C_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */
  202. #define C_PROGRESSIVE_SUPPORTED /* Progressive JPEG? (Requires MULTISCAN)*/
  203. #define ENTROPY_OPT_SUPPORTED /* Optimization of entropy coding parms? */
  204. /* Note: if you selected 12-bit data precision, it is dangerous to turn off
  205. * ENTROPY_OPT_SUPPORTED. The standard Huffman tables are only good for 8-bit
  206. * precision, so jchuff.c normally uses entropy optimization to compute
  207. * usable tables for higher precision. If you don't want to do optimization,
  208. * you'll have to supply different default Huffman tables.
  209. * The exact same statements apply for progressive JPEG: the default tables
  210. * don't work for progressive mode. (This may get fixed, however.)
  211. */
  212. #define INPUT_SMOOTHING_SUPPORTED /* Input image smoothing option? */
  213. /* Decoder capability options: */
  214. #undef D_ARITH_CODING_SUPPORTED /* Arithmetic coding back end? */
  215. #define D_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */
  216. #define D_PROGRESSIVE_SUPPORTED /* Progressive JPEG? (Requires MULTISCAN)*/
  217. #define BLOCK_SMOOTHING_SUPPORTED /* Block smoothing? (Progressive only) */
  218. #define IDCT_SCALING_SUPPORTED /* Output rescaling via IDCT? */
  219. #undef UPSAMPLE_SCALING_SUPPORTED /* Output rescaling at upsample stage? */
  220. #define UPSAMPLE_MERGING_SUPPORTED /* Fast path for sloppy upsampling? */
  221. #define QUANT_1PASS_SUPPORTED /* 1-pass color quantization? */
  222. #define QUANT_2PASS_SUPPORTED /* 2-pass color quantization? */
  223. /* more capability options later, no doubt */
  224. /*
  225. * Ordering of RGB data in scanlines passed to or from the application.
  226. * If your application wants to deal with data in the order B,G,R, just
  227. * change these macros. You can also deal with formats such as R,G,B,X
  228. * (one extra byte per pixel) by changing RGB_PIXELSIZE. Note that changing
  229. * the offsets will also change the order in which colormap data is organized.
  230. * RESTRICTIONS:
  231. * 1. The sample applications cjpeg,djpeg do NOT support modified RGB formats.
  232. * 2. These macros only affect RGB<=>YCbCr color conversion, so they are not
  233. * useful if you are using JPEG color spaces other than YCbCr or grayscale.
  234. * 3. The color quantizer modules will not behave desirably if RGB_PIXELSIZE
  235. * is not 3 (they don't understand about dummy color components!). So you
  236. * can't use color quantization if you change that value.
  237. */
  238. #define RGB_RED 0 /* Offset of Red in an RGB scanline element */
  239. #define RGB_GREEN 1 /* Offset of Green */
  240. #define RGB_BLUE 2 /* Offset of Blue */
  241. #define RGB_PIXELSIZE 3 /* JSAMPLEs per RGB scanline element */
  242. #ifdef WIAJPEG
  243. #define BGR_BLUE 0 /* Offset of Red in an BGR scanline element */
  244. #define BGR_GREEN 1 /* Offset of Green */
  245. #define BGR_RED 2 /* Offset of Blue */
  246. #define BGR_PIXELSIZE 3 /* JSAMPLEs per BGR scanline element */
  247. #endif
  248. /* Definitions for speed-related optimizations. */
  249. /* If your compiler supports inline functions, define INLINE
  250. * as the inline keyword; otherwise define it as empty.
  251. */
  252. #ifndef INLINE
  253. #ifdef __GNUC__ /* for instance, GNU C knows about inline */
  254. #define INLINE __inline__
  255. #endif
  256. #ifndef INLINE
  257. #define INLINE /* default is to define it as empty */
  258. #endif
  259. #endif
  260. /* On some machines (notably 68000 series) "int" is 32 bits, but multiplying
  261. * two 16-bit shorts is faster than multiplying two ints. Define MULTIPLIER
  262. * as short on such a machine. MULTIPLIER must be at least 16 bits wide.
  263. */
  264. #ifndef MULTIPLIER
  265. #define MULTIPLIER int /* type for fastest integer multiply */
  266. #endif
  267. /* FAST_FLOAT should be either float or double, whichever is done faster
  268. * by your compiler. (Note that this type is only used in the floating point
  269. * DCT routines, so it only matters if you've defined DCT_FLOAT_SUPPORTED.)
  270. * Typically, float is faster in ANSI C compilers, while double is faster in
  271. * pre-ANSI compilers (because they insist on converting to double anyway).
  272. * The code below therefore chooses float if we have ANSI-style prototypes.
  273. */
  274. #ifndef FAST_FLOAT
  275. #ifdef HAVE_PROTOTYPES
  276. #define FAST_FLOAT float
  277. #else
  278. #define FAST_FLOAT double
  279. #endif
  280. #endif
  281. #endif /* JPEG_INTERNAL_OPTIONS */