1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/libs/libjpeg/jmorecfg.h	Thu Sep 08 06:28:38 2011 +0300
     1.3 @@ -0,0 +1,367 @@
     1.4 +/*
     1.5 + * jmorecfg.h
     1.6 + *
     1.7 + * Copyright (C) 1991-1997, Thomas G. Lane.
     1.8 + * This file is part of the Independent JPEG Group's software.
     1.9 + * For conditions of distribution and use, see the accompanying README file.
    1.10 + *
    1.11 + * This file contains additional configuration options that customize the
    1.12 + * JPEG software for special applications or support machine-dependent
    1.13 + * optimizations.  Most users will not need to touch this file.
    1.14 + */
    1.15 +
    1.16 +
    1.17 +/*
    1.18 + * Define BITS_IN_JSAMPLE as either
    1.19 + *   8   for 8-bit sample values (the usual setting)
    1.20 + *   12  for 12-bit sample values
    1.21 + * Only 8 and 12 are legal data precisions for lossy JPEG according to the
    1.22 + * JPEG standard, and the IJG code does not support anything else!
    1.23 + * We do not support run-time selection of data precision, sorry.
    1.24 + */
    1.25 +
    1.26 +#define BITS_IN_JSAMPLE  8	/* use 8 or 12 */
    1.27 +
    1.28 +
    1.29 +/*
    1.30 + * Maximum number of components (color channels) allowed in JPEG image.
    1.31 + * To meet the letter of the JPEG spec, set this to 255.  However, darn
    1.32 + * few applications need more than 4 channels (maybe 5 for CMYK + alpha
    1.33 + * mask).  We recommend 10 as a reasonable compromise; use 4 if you are
    1.34 + * really short on memory.  (Each allowed component costs a hundred or so
    1.35 + * bytes of storage, whether actually used in an image or not.)
    1.36 + */
    1.37 +
    1.38 +#define MAX_COMPONENTS  10	/* maximum number of image components */
    1.39 +
    1.40 +
    1.41 +/*
    1.42 + * Basic data types.
    1.43 + * You may need to change these if you have a machine with unusual data
    1.44 + * type sizes; for example, "char" not 8 bits, "short" not 16 bits,
    1.45 + * or "long" not 32 bits.  We don't care whether "int" is 16 or 32 bits,
    1.46 + * but it had better be at least 16.
    1.47 + */
    1.48 +
    1.49 +/* Representation of a single sample (pixel element value).
    1.50 + * We frequently allocate large arrays of these, so it's important to keep
    1.51 + * them small.  But if you have memory to burn and access to char or short
    1.52 + * arrays is very slow on your hardware, you might want to change these.
    1.53 + */
    1.54 +
    1.55 +#if BITS_IN_JSAMPLE == 8
    1.56 +/* JSAMPLE should be the smallest type that will hold the values 0..255.
    1.57 + * You can use a signed char by having GETJSAMPLE mask it with 0xFF.
    1.58 + */
    1.59 +
    1.60 +#ifdef HAVE_UNSIGNED_CHAR
    1.61 +
    1.62 +typedef unsigned char JSAMPLE;
    1.63 +#define GETJSAMPLE(value)  ((int) (value))
    1.64 +
    1.65 +#else /* not HAVE_UNSIGNED_CHAR */
    1.66 +
    1.67 +typedef char JSAMPLE;
    1.68 +#ifdef CHAR_IS_UNSIGNED
    1.69 +#define GETJSAMPLE(value)  ((int) (value))
    1.70 +#else
    1.71 +#define GETJSAMPLE(value)  ((int) (value) & 0xFF)
    1.72 +#endif /* CHAR_IS_UNSIGNED */
    1.73 +
    1.74 +#endif /* HAVE_UNSIGNED_CHAR */
    1.75 +
    1.76 +#define MAXJSAMPLE	255
    1.77 +#define CENTERJSAMPLE	128
    1.78 +
    1.79 +#endif /* BITS_IN_JSAMPLE == 8 */
    1.80 +
    1.81 +
    1.82 +#if BITS_IN_JSAMPLE == 12
    1.83 +/* JSAMPLE should be the smallest type that will hold the values 0..4095.
    1.84 + * On nearly all machines "short" will do nicely.
    1.85 + */
    1.86 +
    1.87 +typedef short JSAMPLE;
    1.88 +#define GETJSAMPLE(value)  ((int) (value))
    1.89 +
    1.90 +#define MAXJSAMPLE	4095
    1.91 +#define CENTERJSAMPLE	2048
    1.92 +
    1.93 +#endif /* BITS_IN_JSAMPLE == 12 */
    1.94 +
    1.95 +
    1.96 +/* Representation of a DCT frequency coefficient.
    1.97 + * This should be a signed value of at least 16 bits; "short" is usually OK.
    1.98 + * Again, we allocate large arrays of these, but you can change to int
    1.99 + * if you have memory to burn and "short" is really slow.
   1.100 + */
   1.101 +
   1.102 +typedef short JCOEF;
   1.103 +
   1.104 +
   1.105 +/* Compressed datastreams are represented as arrays of JOCTET.
   1.106 + * These must be EXACTLY 8 bits wide, at least once they are written to
   1.107 + * external storage.  Note that when using the stdio data source/destination
   1.108 + * managers, this is also the data type passed to fread/fwrite.
   1.109 + */
   1.110 +
   1.111 +#ifdef HAVE_UNSIGNED_CHAR
   1.112 +
   1.113 +typedef unsigned char JOCTET;
   1.114 +#define GETJOCTET(value)  (value)
   1.115 +
   1.116 +#else /* not HAVE_UNSIGNED_CHAR */
   1.117 +
   1.118 +typedef char JOCTET;
   1.119 +#ifdef CHAR_IS_UNSIGNED
   1.120 +#define GETJOCTET(value)  (value)
   1.121 +#else
   1.122 +#define GETJOCTET(value)  ((value) & 0xFF)
   1.123 +#endif /* CHAR_IS_UNSIGNED */
   1.124 +
   1.125 +#endif /* HAVE_UNSIGNED_CHAR */
   1.126 +
   1.127 +
   1.128 +/* These typedefs are used for various table entries and so forth.
   1.129 + * They must be at least as wide as specified; but making them too big
   1.130 + * won't cost a huge amount of memory, so we don't provide special
   1.131 + * extraction code like we did for JSAMPLE.  (In other words, these
   1.132 + * typedefs live at a different point on the speed/space tradeoff curve.)
   1.133 + */
   1.134 +
   1.135 +/* UINT8 must hold at least the values 0..255. */
   1.136 +
   1.137 +#ifdef HAVE_UNSIGNED_CHAR
   1.138 +typedef unsigned char UINT8;
   1.139 +#else /* not HAVE_UNSIGNED_CHAR */
   1.140 +#ifdef CHAR_IS_UNSIGNED
   1.141 +typedef char UINT8;
   1.142 +#else /* not CHAR_IS_UNSIGNED */
   1.143 +typedef short UINT8;
   1.144 +#endif /* CHAR_IS_UNSIGNED */
   1.145 +#endif /* HAVE_UNSIGNED_CHAR */
   1.146 +
   1.147 +/* UINT16 must hold at least the values 0..65535. */
   1.148 +
   1.149 +#ifdef HAVE_UNSIGNED_SHORT
   1.150 +typedef unsigned short UINT16;
   1.151 +#else /* not HAVE_UNSIGNED_SHORT */
   1.152 +typedef unsigned int UINT16;
   1.153 +#endif /* HAVE_UNSIGNED_SHORT */
   1.154 +
   1.155 +/* INT16 must hold at least the values -32768..32767. */
   1.156 +
   1.157 +#ifndef XMD_H			/* X11/xmd.h correctly defines INT16 */
   1.158 +typedef short INT16;
   1.159 +#endif
   1.160 +
   1.161 +/* INT32 must hold at least signed 32-bit values. */
   1.162 +
   1.163 +#ifndef XMD_H			/* X11/xmd.h correctly defines INT32 */
   1.164 +typedef int INT32;
   1.165 +#endif
   1.166 +
   1.167 +/* Datatype used for image dimensions.  The JPEG standard only supports
   1.168 + * images up to 64K*64K due to 16-bit fields in SOF markers.  Therefore
   1.169 + * "unsigned int" is sufficient on all machines.  However, if you need to
   1.170 + * handle larger images and you don't mind deviating from the spec, you
   1.171 + * can change this datatype.
   1.172 + */
   1.173 +
   1.174 +typedef unsigned int JDIMENSION;
   1.175 +
   1.176 +#define JPEG_MAX_DIMENSION  65500L  /* a tad under 64K to prevent overflows */
   1.177 +
   1.178 +
   1.179 +/* These macros are used in all function definitions and extern declarations.
   1.180 + * You could modify them if you need to change function linkage conventions;
   1.181 + * in particular, you'll need to do that to make the library a Windows DLL.
   1.182 + * Another application is to make all functions global for use with debuggers
   1.183 + * or code profilers that require it.
   1.184 + */
   1.185 +
   1.186 +/* a function called through method pointers: */
   1.187 +#define METHODDEF(type)		static type
   1.188 +/* a function used only in its module: */
   1.189 +#define LOCAL(type)		static type
   1.190 +/* a function referenced thru EXTERNs: */
   1.191 +#define GLOBAL(type)		type
   1.192 +/* a reference to a GLOBAL function: */
   1.193 +#define EXTERN(type)		extern type
   1.194 +
   1.195 +
   1.196 +/* This macro is used to declare a "method", that is, a function pointer.
   1.197 + * We want to supply prototype parameters if the compiler can cope.
   1.198 + * Note that the arglist parameter must be parenthesized!
   1.199 + * Again, you can customize this if you need special linkage keywords.
   1.200 + */
   1.201 +
   1.202 +#ifdef HAVE_PROTOTYPES
   1.203 +#define JMETHOD(type,methodname,arglist)  type (*methodname) arglist
   1.204 +#else
   1.205 +#define JMETHOD(type,methodname,arglist)  type (*methodname) ()
   1.206 +#endif
   1.207 +
   1.208 +
   1.209 +/* Here is the pseudo-keyword for declaring pointers that must be "far"
   1.210 + * on 80x86 machines.  Most of the specialized coding for 80x86 is handled
   1.211 + * by just saying "FAR *" where such a pointer is needed.  In a few places
   1.212 + * explicit coding is needed; see uses of the NEED_FAR_POINTERS symbol.
   1.213 + */
   1.214 +
   1.215 +#ifdef FAR
   1.216 +#undef FAR
   1.217 +#endif
   1.218 +
   1.219 +#ifdef NEED_FAR_POINTERS
   1.220 +#define FAR  far
   1.221 +#else
   1.222 +#define FAR
   1.223 +#endif
   1.224 +
   1.225 +
   1.226 +/*
   1.227 + * On a few systems, type boolean and/or its values FALSE, TRUE may appear
   1.228 + * in standard header files.  Or you may have conflicts with application-
   1.229 + * specific header files that you want to include together with these files.
   1.230 + * Defining HAVE_BOOLEAN before including jpeglib.h should make it work.
   1.231 + */
   1.232 +
   1.233 +#ifndef HAVE_BOOLEAN
   1.234 +typedef int boolean;
   1.235 +#endif
   1.236 +#ifndef FALSE			/* in case these macros already exist */
   1.237 +#define FALSE	0		/* values of boolean */
   1.238 +#endif
   1.239 +#ifndef TRUE
   1.240 +#define TRUE	1
   1.241 +#endif
   1.242 +
   1.243 +
   1.244 +/*
   1.245 + * The remaining options affect code selection within the JPEG library,
   1.246 + * but they don't need to be visible to most applications using the library.
   1.247 + * To minimize application namespace pollution, the symbols won't be
   1.248 + * defined unless JPEG_INTERNALS or JPEG_INTERNAL_OPTIONS has been defined.
   1.249 + */
   1.250 +
   1.251 +#ifdef JPEG_INTERNALS
   1.252 +#define JPEG_INTERNAL_OPTIONS
   1.253 +#endif
   1.254 +
   1.255 +#ifdef JPEG_INTERNAL_OPTIONS
   1.256 +
   1.257 +
   1.258 +/*
   1.259 + * These defines indicate whether to include various optional functions.
   1.260 + * Undefining some of these symbols will produce a smaller but less capable
   1.261 + * library.  Note that you can leave certain source files out of the
   1.262 + * compilation/linking process if you've #undef'd the corresponding symbols.
   1.263 + * (You may HAVE to do that if your compiler doesn't like null source files.)
   1.264 + */
   1.265 +
   1.266 +/* Arithmetic coding is unsupported for legal reasons.  Complaints to IBM. */
   1.267 +
   1.268 +/* Capability options common to encoder and decoder: */
   1.269 +
   1.270 +#define DCT_ISLOW_SUPPORTED	/* slow but accurate integer algorithm */
   1.271 +#define DCT_IFAST_SUPPORTED	/* faster, less accurate integer method */
   1.272 +#define DCT_FLOAT_SUPPORTED	/* floating-point: accurate, fast on fast HW */
   1.273 +
   1.274 +/* Encoder capability options: */
   1.275 +
   1.276 +#undef  C_ARITH_CODING_SUPPORTED    /* Arithmetic coding back end? */
   1.277 +#define C_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */
   1.278 +#define C_PROGRESSIVE_SUPPORTED	    /* Progressive JPEG? (Requires MULTISCAN)*/
   1.279 +#define ENTROPY_OPT_SUPPORTED	    /* Optimization of entropy coding parms? */
   1.280 +/* Note: if you selected 12-bit data precision, it is dangerous to turn off
   1.281 + * ENTROPY_OPT_SUPPORTED.  The standard Huffman tables are only good for 8-bit
   1.282 + * precision, so jchuff.c normally uses entropy optimization to compute
   1.283 + * usable tables for higher precision.  If you don't want to do optimization,
   1.284 + * you'll have to supply different default Huffman tables.
   1.285 + * The exact same statements apply for progressive JPEG: the default tables
   1.286 + * don't work for progressive mode.  (This may get fixed, however.)
   1.287 + */
   1.288 +#define INPUT_SMOOTHING_SUPPORTED   /* Input image smoothing option? */
   1.289 +
   1.290 +/* Decoder capability options: */
   1.291 +
   1.292 +#undef  D_ARITH_CODING_SUPPORTED    /* Arithmetic coding back end? */
   1.293 +#define D_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */
   1.294 +#define D_PROGRESSIVE_SUPPORTED	    /* Progressive JPEG? (Requires MULTISCAN)*/
   1.295 +#define SAVE_MARKERS_SUPPORTED	    /* jpeg_save_markers() needed? */
   1.296 +#define BLOCK_SMOOTHING_SUPPORTED   /* Block smoothing? (Progressive only) */
   1.297 +#define IDCT_SCALING_SUPPORTED	    /* Output rescaling via IDCT? */
   1.298 +#undef  UPSAMPLE_SCALING_SUPPORTED  /* Output rescaling at upsample stage? */
   1.299 +#define UPSAMPLE_MERGING_SUPPORTED  /* Fast path for sloppy upsampling? */
   1.300 +#define QUANT_1PASS_SUPPORTED	    /* 1-pass color quantization? */
   1.301 +#define QUANT_2PASS_SUPPORTED	    /* 2-pass color quantization? */
   1.302 +
   1.303 +/* more capability options later, no doubt */
   1.304 +
   1.305 +
   1.306 +/*
   1.307 + * Ordering of RGB data in scanlines passed to or from the application.
   1.308 + * If your application wants to deal with data in the order B,G,R, just
   1.309 + * change these macros.  You can also deal with formats such as R,G,B,X
   1.310 + * (one extra byte per pixel) by changing RGB_PIXELSIZE.  Note that changing
   1.311 + * the offsets will also change the order in which colormap data is organized.
   1.312 + * RESTRICTIONS:
   1.313 + * 1. The sample applications cjpeg,djpeg do NOT support modified RGB formats.
   1.314 + * 2. These macros only affect RGB<=>YCbCr color conversion, so they are not
   1.315 + *    useful if you are using JPEG color spaces other than YCbCr or grayscale.
   1.316 + * 3. The color quantizer modules will not behave desirably if RGB_PIXELSIZE
   1.317 + *    is not 3 (they don't understand about dummy color components!).  So you
   1.318 + *    can't use color quantization if you change that value.
   1.319 + */
   1.320 +
   1.321 +#define RGB_RED		0	/* Offset of Red in an RGB scanline element */
   1.322 +#define RGB_GREEN	1	/* Offset of Green */
   1.323 +#define RGB_BLUE	2	/* Offset of Blue */
   1.324 +#define RGB_PIXELSIZE	3	/* JSAMPLEs per RGB scanline element */
   1.325 +
   1.326 +
   1.327 +/* Definitions for speed-related optimizations. */
   1.328 +
   1.329 +
   1.330 +/* If your compiler supports inline functions, define INLINE
   1.331 + * as the inline keyword; otherwise define it as empty.
   1.332 + */
   1.333 +
   1.334 +#ifndef INLINE
   1.335 +#ifdef __GNUC__			/* for instance, GNU C knows about inline */
   1.336 +#define INLINE __inline__
   1.337 +#endif
   1.338 +#ifndef INLINE
   1.339 +#define INLINE			/* default is to define it as empty */
   1.340 +#endif
   1.341 +#endif
   1.342 +
   1.343 +
   1.344 +/* On some machines (notably 68000 series) "int" is 32 bits, but multiplying
   1.345 + * two 16-bit shorts is faster than multiplying two ints.  Define MULTIPLIER
   1.346 + * as short on such a machine.  MULTIPLIER must be at least 16 bits wide.
   1.347 + */
   1.348 +
   1.349 +#ifndef MULTIPLIER
   1.350 +#define MULTIPLIER  int		/* type for fastest integer multiply */
   1.351 +#endif
   1.352 +
   1.353 +
   1.354 +/* FAST_FLOAT should be either float or double, whichever is done faster
   1.355 + * by your compiler.  (Note that this type is only used in the floating point
   1.356 + * DCT routines, so it only matters if you've defined DCT_FLOAT_SUPPORTED.)
   1.357 + * Typically, float is faster in ANSI C compilers, while double is faster in
   1.358 + * pre-ANSI compilers (because they insist on converting to double anyway).
   1.359 + * The code below therefore chooses float if we have ANSI-style prototypes.
   1.360 + */
   1.361 +
   1.362 +#ifndef FAST_FLOAT
   1.363 +#ifdef HAVE_PROTOTYPES
   1.364 +#define FAST_FLOAT  float
   1.365 +#else
   1.366 +#define FAST_FLOAT  double
   1.367 +#endif
   1.368 +#endif
   1.369 +
   1.370 +#endif /* JPEG_INTERNAL_OPTIONS */