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Side by Side Diff: core/include/thirdparties/libjpeg/jmorecfg.h

Issue 1265503005: clang-format all pdfium code. (Closed) Base URL: https://pdfium.googlesource.com/pdfium.git@master
Patch Set: Created 5 years, 4 months ago
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1 /* 1 /*
2 * jmorecfg.h 2 * jmorecfg.h
3 * 3 *
4 * Copyright (C) 1991-1997, Thomas G. Lane. 4 * Copyright (C) 1991-1997, Thomas G. Lane.
5 * This file is part of the Independent JPEG Group's software. 5 * This file is part of the Independent JPEG Group's software.
6 * For conditions of distribution and use, see the accompanying README file. 6 * For conditions of distribution and use, see the accompanying README file.
7 * 7 *
8 * This file contains additional configuration options that customize the 8 * This file contains additional configuration options that customize the
9 * JPEG software for special applications or support machine-dependent 9 * JPEG software for special applications or support machine-dependent
10 * optimizations. Most users will not need to touch this file. 10 * optimizations. Most users will not need to touch this file.
11 */ 11 */
12 12
13 #ifdef _MSC_VER 13 #ifdef _MSC_VER
14 #pragma warning (disable : 4142) 14 #pragma warning(disable : 4142)
15 #endif 15 #endif
16 16
17 /* 17 /*
18 * Define BITS_IN_JSAMPLE as either 18 * Define BITS_IN_JSAMPLE as either
19 * 8 for 8-bit sample values (the usual setting) 19 * 8 for 8-bit sample values (the usual setting)
20 * 12 for 12-bit sample values 20 * 12 for 12-bit sample values
21 * Only 8 and 12 are legal data precisions for lossy JPEG according to the 21 * Only 8 and 12 are legal data precisions for lossy JPEG according to the
22 * JPEG standard, and the IJG code does not support anything else! 22 * JPEG standard, and the IJG code does not support anything else!
23 * We do not support run-time selection of data precision, sorry. 23 * We do not support run-time selection of data precision, sorry.
24 */ 24 */
25 25
26 #define BITS_IN_JSAMPLE 8» /* use 8 or 12 */ 26 #define BITS_IN_JSAMPLE 8 /* use 8 or 12 */
27
28 27
29 /* 28 /*
30 * Maximum number of components (color channels) allowed in JPEG image. 29 * Maximum number of components (color channels) allowed in JPEG image.
31 * To meet the letter of the JPEG spec, set this to 255. However, darn 30 * To meet the letter of the JPEG spec, set this to 255. However, darn
32 * few applications need more than 4 channels (maybe 5 for CMYK + alpha 31 * few applications need more than 4 channels (maybe 5 for CMYK + alpha
33 * mask). We recommend 10 as a reasonable compromise; use 4 if you are 32 * mask). We recommend 10 as a reasonable compromise; use 4 if you are
34 * really short on memory. (Each allowed component costs a hundred or so 33 * really short on memory. (Each allowed component costs a hundred or so
35 * bytes of storage, whether actually used in an image or not.) 34 * bytes of storage, whether actually used in an image or not.)
36 */ 35 */
37 36
38 #define MAX_COMPONENTS 10» /* maximum number of image components */ 37 #define MAX_COMPONENTS 10 /* maximum number of image components */
39
40 38
41 /* 39 /*
42 * Basic data types. 40 * Basic data types.
43 * You may need to change these if you have a machine with unusual data 41 * You may need to change these if you have a machine with unusual data
44 * type sizes; for example, "char" not 8 bits, "short" not 16 bits, 42 * type sizes; for example, "char" not 8 bits, "short" not 16 bits,
45 * or "long" not 32 bits. We don't care whether "int" is 16 or 32 bits, 43 * or "long" not 32 bits. We don't care whether "int" is 16 or 32 bits,
46 * but it had better be at least 16. 44 * but it had better be at least 16.
47 */ 45 */
48 46
49 /* Representation of a single sample (pixel element value). 47 /* Representation of a single sample (pixel element value).
50 * We frequently allocate large arrays of these, so it's important to keep 48 * We frequently allocate large arrays of these, so it's important to keep
51 * them small. But if you have memory to burn and access to char or short 49 * them small. But if you have memory to burn and access to char or short
52 * arrays is very slow on your hardware, you might want to change these. 50 * arrays is very slow on your hardware, you might want to change these.
53 */ 51 */
54 52
55 #if BITS_IN_JSAMPLE == 8 53 #if BITS_IN_JSAMPLE == 8
56 /* JSAMPLE should be the smallest type that will hold the values 0..255. 54 /* JSAMPLE should be the smallest type that will hold the values 0..255.
57 * You can use a signed char by having GETJSAMPLE mask it with 0xFF. 55 * You can use a signed char by having GETJSAMPLE mask it with 0xFF.
58 */ 56 */
59 57
60 #ifdef HAVE_UNSIGNED_CHAR 58 #ifdef HAVE_UNSIGNED_CHAR
61 59
62 typedef unsigned char JSAMPLE; 60 typedef unsigned char JSAMPLE;
63 #define GETJSAMPLE(value) ((int) (value)) 61 #define GETJSAMPLE(value) ((int)(value))
64 62
65 #else /* not HAVE_UNSIGNED_CHAR */ 63 #else /* not HAVE_UNSIGNED_CHAR */
66 64
67 typedef char JSAMPLE; 65 typedef char JSAMPLE;
68 #ifdef CHAR_IS_UNSIGNED 66 #ifdef CHAR_IS_UNSIGNED
69 #define GETJSAMPLE(value) ((int) (value)) 67 #define GETJSAMPLE(value) ((int)(value))
70 #else 68 #else
71 #define GETJSAMPLE(value) ((int) (value) & 0xFF) 69 #define GETJSAMPLE(value) ((int)(value)&0xFF)
72 #endif /* CHAR_IS_UNSIGNED */ 70 #endif /* CHAR_IS_UNSIGNED */
73 71
74 #endif /* HAVE_UNSIGNED_CHAR */ 72 #endif /* HAVE_UNSIGNED_CHAR */
75 73
76 #define MAXJSAMPLE» 255 74 #define MAXJSAMPLE 255
77 #define CENTERJSAMPLE» 128 75 #define CENTERJSAMPLE 128
78 76
79 #endif /* BITS_IN_JSAMPLE == 8 */ 77 #endif /* BITS_IN_JSAMPLE == 8 */
80 78
81
82 #if BITS_IN_JSAMPLE == 12 79 #if BITS_IN_JSAMPLE == 12
83 /* JSAMPLE should be the smallest type that will hold the values 0..4095. 80 /* JSAMPLE should be the smallest type that will hold the values 0..4095.
84 * On nearly all machines "short" will do nicely. 81 * On nearly all machines "short" will do nicely.
85 */ 82 */
86 83
87 typedef short JSAMPLE; 84 typedef short JSAMPLE;
88 #define GETJSAMPLE(value) ((int) (value)) 85 #define GETJSAMPLE(value) ((int)(value))
89 86
90 #define MAXJSAMPLE» 4095 87 #define MAXJSAMPLE 4095
91 #define CENTERJSAMPLE» 2048 88 #define CENTERJSAMPLE 2048
92 89
93 #endif /* BITS_IN_JSAMPLE == 12 */ 90 #endif /* BITS_IN_JSAMPLE == 12 */
94 91
95
96 /* Representation of a DCT frequency coefficient. 92 /* Representation of a DCT frequency coefficient.
97 * This should be a signed value of at least 16 bits; "short" is usually OK. 93 * This should be a signed value of at least 16 bits; "short" is usually OK.
98 * Again, we allocate large arrays of these, but you can change to int 94 * Again, we allocate large arrays of these, but you can change to int
99 * if you have memory to burn and "short" is really slow. 95 * if you have memory to burn and "short" is really slow.
100 */ 96 */
101 97
102 typedef short JCOEF; 98 typedef short JCOEF;
103 99
104
105 /* Compressed datastreams are represented as arrays of JOCTET. 100 /* Compressed datastreams are represented as arrays of JOCTET.
106 * These must be EXACTLY 8 bits wide, at least once they are written to 101 * These must be EXACTLY 8 bits wide, at least once they are written to
107 * external storage. Note that when using the stdio data source/destination 102 * external storage. Note that when using the stdio data source/destination
108 * managers, this is also the data type passed to fread/fwrite. 103 * managers, this is also the data type passed to fread/fwrite.
109 */ 104 */
110 105
111 #ifdef HAVE_UNSIGNED_CHAR 106 #ifdef HAVE_UNSIGNED_CHAR
112 107
113 typedef unsigned char JOCTET; 108 typedef unsigned char JOCTET;
114 #define GETJOCTET(value) (value) 109 #define GETJOCTET(value) (value)
115 110
116 #else /* not HAVE_UNSIGNED_CHAR */ 111 #else /* not HAVE_UNSIGNED_CHAR */
117 112
118 typedef char JOCTET; 113 typedef char JOCTET;
119 #ifdef CHAR_IS_UNSIGNED 114 #ifdef CHAR_IS_UNSIGNED
120 #define GETJOCTET(value) (value) 115 #define GETJOCTET(value) (value)
121 #else 116 #else
122 #define GETJOCTET(value) ((value) & 0xFF) 117 #define GETJOCTET(value) ((value)&0xFF)
123 #endif /* CHAR_IS_UNSIGNED */ 118 #endif /* CHAR_IS_UNSIGNED */
124 119
125 #endif /* HAVE_UNSIGNED_CHAR */ 120 #endif /* HAVE_UNSIGNED_CHAR */
126 121
127
128 /* These typedefs are used for various table entries and so forth. 122 /* These typedefs are used for various table entries and so forth.
129 * They must be at least as wide as specified; but making them too big 123 * They must be at least as wide as specified; but making them too big
130 * won't cost a huge amount of memory, so we don't provide special 124 * won't cost a huge amount of memory, so we don't provide special
131 * extraction code like we did for JSAMPLE. (In other words, these 125 * extraction code like we did for JSAMPLE. (In other words, these
132 * typedefs live at a different point on the speed/space tradeoff curve.) 126 * typedefs live at a different point on the speed/space tradeoff curve.)
133 */ 127 */
134 128
135 #if _FX_OS_ != _FX_VXWORKS_ 129 #if _FX_OS_ != _FX_VXWORKS_
136 130
137 /* UINT8 must hold at least the values 0..255. */ 131 /* UINT8 must hold at least the values 0..255. */
138 132
139 #ifdef HAVE_UNSIGNED_CHAR 133 #ifdef HAVE_UNSIGNED_CHAR
140 typedef unsigned char UINT8; 134 typedef unsigned char UINT8;
141 #else /* not HAVE_UNSIGNED_CHAR */ 135 #else /* not HAVE_UNSIGNED_CHAR */
142 #ifdef CHAR_IS_UNSIGNED 136 #ifdef CHAR_IS_UNSIGNED
143 typedef char UINT8; 137 typedef char UINT8;
144 #else /* not CHAR_IS_UNSIGNED */ 138 #else /* not CHAR_IS_UNSIGNED */
145 typedef short UINT8; 139 typedef short UINT8;
146 #endif /* CHAR_IS_UNSIGNED */ 140 #endif /* CHAR_IS_UNSIGNED */
147 #endif /* HAVE_UNSIGNED_CHAR */ 141 #endif /* HAVE_UNSIGNED_CHAR */
148 142
149
150 /* UINT16 must hold at least the values 0..65535. */ 143 /* UINT16 must hold at least the values 0..65535. */
151 144
152 #ifdef HAVE_UNSIGNED_SHORT 145 #ifdef HAVE_UNSIGNED_SHORT
153 typedef unsigned short UINT16; 146 typedef unsigned short UINT16;
154 #else /* not HAVE_UNSIGNED_SHORT */ 147 #else /* not HAVE_UNSIGNED_SHORT */
155 typedef unsigned int UINT16; 148 typedef unsigned int UINT16;
156 #endif /* HAVE_UNSIGNED_SHORT */ 149 #endif /* HAVE_UNSIGNED_SHORT */
157 150
158 /* INT16 must hold at least the values -32768..32767. */ 151 /* INT16 must hold at least the values -32768..32767. */
159 152
160 #ifndef XMD_H» » » /* X11/xmd.h correctly defines INT16 */ 153 #ifndef XMD_H /* X11/xmd.h correctly defines INT16 */
161 typedef short INT16; 154 typedef short INT16;
162 #endif 155 #endif
163 156
164 /* INT32 must hold at least signed 32-bit values. */ 157 /* INT32 must hold at least signed 32-bit values. */
165 158
166 #ifndef XMD_H» » » /* X11/xmd.h correctly defines INT32 */ 159 #ifndef XMD_H /* X11/xmd.h correctly defines INT32 */
167 typedef int INT32; 160 typedef int INT32;
168 #endif 161 #endif
169 162
170 #endif 163 #endif
171 164
172 /* Datatype used for image dimensions. The JPEG standard only supports 165 /* Datatype used for image dimensions. The JPEG standard only supports
173 * images up to 64K*64K due to 16-bit fields in SOF markers. Therefore 166 * images up to 64K*64K due to 16-bit fields in SOF markers. Therefore
174 * "unsigned int" is sufficient on all machines. However, if you need to 167 * "unsigned int" is sufficient on all machines. However, if you need to
175 * handle larger images and you don't mind deviating from the spec, you 168 * handle larger images and you don't mind deviating from the spec, you
176 * can change this datatype. 169 * can change this datatype.
177 */ 170 */
178 171
179 typedef unsigned int JDIMENSION; 172 typedef unsigned int JDIMENSION;
180 173
181 #define JPEG_MAX_DIMENSION 65500L /* a tad under 64K to prevent overflows */ 174 #define JPEG_MAX_DIMENSION 65500L /* a tad under 64K to prevent overflows */
182
183 175
184 /* These macros are used in all function definitions and extern declarations. 176 /* These macros are used in all function definitions and extern declarations.
185 * You could modify them if you need to change function linkage conventions; 177 * You could modify them if you need to change function linkage conventions;
186 * in particular, you'll need to do that to make the library a Windows DLL. 178 * in particular, you'll need to do that to make the library a Windows DLL.
187 * Another application is to make all functions global for use with debuggers 179 * Another application is to make all functions global for use with debuggers
188 * or code profilers that require it. 180 * or code profilers that require it.
189 */ 181 */
190 182
191 /* a function called through method pointers: */ 183 /* a function called through method pointers: */
192 #define METHODDEF(type)»» static type 184 #define METHODDEF(type) static type
193 /* a function used only in its module: */ 185 /* a function used only in its module: */
194 #define LOCAL(type)» » static type 186 #define LOCAL(type) static type
195 /* a function referenced thru EXTERNs: */ 187 /* a function referenced thru EXTERNs: */
196 #define GLOBAL(type)» » type 188 #define GLOBAL(type) type
197 189
198 #ifdef _FX_MANAGED_CODE_ 190 #ifdef _FX_MANAGED_CODE_
199 #define EXTERN(type)» » extern "C" type 191 #define EXTERN(type) extern "C" type
200 #else 192 #else
201 /* a reference to a GLOBAL function: */ 193 /* a reference to a GLOBAL function: */
202 #define EXTERN(type)» » extern type 194 #define EXTERN(type) extern type
203 #endif 195 #endif
204 196
205
206 /* This macro is used to declare a "method", that is, a function pointer. 197 /* This macro is used to declare a "method", that is, a function pointer.
207 * We want to supply prototype parameters if the compiler can cope. 198 * We want to supply prototype parameters if the compiler can cope.
208 * Note that the arglist parameter must be parenthesized! 199 * Note that the arglist parameter must be parenthesized!
209 * Again, you can customize this if you need special linkage keywords. 200 * Again, you can customize this if you need special linkage keywords.
210 */ 201 */
211 202
212 #ifdef HAVE_PROTOTYPES 203 #ifdef HAVE_PROTOTYPES
213 #define JMETHOD(type,methodname,arglist) type (*methodname) arglist 204 #define JMETHOD(type, methodname, arglist) type(*methodname) arglist
214 #else 205 #else
215 #define JMETHOD(type,methodname,arglist) type (*methodname) () 206 #define JMETHOD(type, methodname, arglist) type (*methodname)()
216 #endif 207 #endif
217 208
218
219 /* Here is the pseudo-keyword for declaring pointers that must be "far" 209 /* Here is the pseudo-keyword for declaring pointers that must be "far"
220 * on 80x86 machines. Most of the specialized coding for 80x86 is handled 210 * on 80x86 machines. Most of the specialized coding for 80x86 is handled
221 * by just saying "FAR *" where such a pointer is needed. In a few places 211 * by just saying "FAR *" where such a pointer is needed. In a few places
222 * explicit coding is needed; see uses of the NEED_FAR_POINTERS symbol. 212 * explicit coding is needed; see uses of the NEED_FAR_POINTERS symbol.
223 */ 213 */
224 214
225 #ifdef NEED_FAR_POINTERS 215 #ifdef NEED_FAR_POINTERS
226 #define FAR far 216 #define FAR far
227 #else 217 #else
228 //#define FAR 218 //#define FAR
229 #endif 219 #endif
230 220
231
232 /* 221 /*
233 * On a few systems, type boolean and/or its values FALSE, TRUE may appear 222 * On a few systems, type boolean and/or its values FALSE, TRUE may appear
234 * in standard header files. Or you may have conflicts with application- 223 * in standard header files. Or you may have conflicts with application-
235 * specific header files that you want to include together with these files. 224 * specific header files that you want to include together with these files.
236 * Defining HAVE_BOOLEAN before including jpeglib.h should make it work. 225 * Defining HAVE_BOOLEAN before including jpeglib.h should make it work.
237 */ 226 */
238 227
239 #ifndef HAVE_BOOLEAN 228 #ifndef HAVE_BOOLEAN
240 typedef int boolean; 229 typedef int boolean;
241 #endif 230 #endif
242 #ifndef FALSE» » » /* in case these macros already exist */ 231 #ifndef FALSE /* in case these macros already exist */
243 #define FALSE» 0» » /* values of boolean */ 232 #define FALSE 0 /* values of boolean */
244 #endif 233 #endif
245 #ifndef TRUE 234 #ifndef TRUE
246 #define TRUE» 1 235 #define TRUE 1
247 #endif 236 #endif
248 237
249
250 /* 238 /*
251 * The remaining options affect code selection within the JPEG library, 239 * The remaining options affect code selection within the JPEG library,
252 * but they don't need to be visible to most applications using the library. 240 * but they don't need to be visible to most applications using the library.
253 * To minimize application namespace pollution, the symbols won't be 241 * To minimize application namespace pollution, the symbols won't be
254 * defined unless JPEG_INTERNALS or JPEG_INTERNAL_OPTIONS has been defined. 242 * defined unless JPEG_INTERNALS or JPEG_INTERNAL_OPTIONS has been defined.
255 */ 243 */
256 244
257 #ifdef JPEG_INTERNALS 245 #ifdef JPEG_INTERNALS
258 #define JPEG_INTERNAL_OPTIONS 246 #define JPEG_INTERNAL_OPTIONS
259 #endif 247 #endif
260 248
261 #ifdef JPEG_INTERNAL_OPTIONS 249 #ifdef JPEG_INTERNAL_OPTIONS
262 250
263
264 /* 251 /*
265 * These defines indicate whether to include various optional functions. 252 * These defines indicate whether to include various optional functions.
266 * Undefining some of these symbols will produce a smaller but less capable 253 * Undefining some of these symbols will produce a smaller but less capable
267 * library. Note that you can leave certain source files out of the 254 * library. Note that you can leave certain source files out of the
268 * compilation/linking process if you've #undef'd the corresponding symbols. 255 * compilation/linking process if you've #undef'd the corresponding symbols.
269 * (You may HAVE to do that if your compiler doesn't like null source files.) 256 * (You may HAVE to do that if your compiler doesn't like null source files.)
270 */ 257 */
271 258
272 /* Arithmetic coding is unsupported for legal reasons. Complaints to IBM. */ 259 /* Arithmetic coding is unsupported for legal reasons. Complaints to IBM. */
273 260
274 /* Capability options common to encoder and decoder: */ 261 /* Capability options common to encoder and decoder: */
275 262
276 #define DCT_ISLOW_SUPPORTED» /* slow but accurate integer algorithm */ 263 #define DCT_ISLOW_SUPPORTED /* slow but accurate integer algorithm */
277 #define DCT_IFAST_SUPPORTED» /* faster, less accurate integer method */ 264 #define DCT_IFAST_SUPPORTED /* faster, less accurate integer method */
278 #undef DCT_FLOAT_SUPPORTED» /* floating-point: accurate, fast on fast HW */ 265 #undef DCT_FLOAT_SUPPORTED /* floating-point: accurate, fast on fast HW */
279 266
280 /* Encoder capability options: */ 267 /* Encoder capability options: */
281 268
282 #undef C_ARITH_CODING_SUPPORTED /* Arithmetic coding back end? */ 269 #undef C_ARITH_CODING_SUPPORTED /* Arithmetic coding back end? */
283 #define C_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */ 270 #define C_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */
284 #define C_PROGRESSIVE_SUPPORTED» /* Progressive JPEG? (Requires MULTISCAN)*/ 271 #define C_PROGRESSIVE_SUPPORTED /* Progressive JPEG? (Requires MULTISCAN)*/
285 #define ENTROPY_OPT_SUPPORTED» /* Optimization of entropy coding parms? */ 272 #define ENTROPY_OPT_SUPPORTED /* Optimization of entropy coding parms? */
286 /* Note: if you selected 12-bit data precision, it is dangerous to turn off 273 /* Note: if you selected 12-bit data precision, it is dangerous to turn off
287 * ENTROPY_OPT_SUPPORTED. The standard Huffman tables are only good for 8-bit 274 * ENTROPY_OPT_SUPPORTED. The standard Huffman tables are only good for 8-bit
288 * precision, so jchuff.c normally uses entropy optimization to compute 275 * precision, so jchuff.c normally uses entropy optimization to compute
289 * usable tables for higher precision. If you don't want to do optimization, 276 * usable tables for higher precision. If you don't want to do optimization,
290 * you'll have to supply different default Huffman tables. 277 * you'll have to supply different default Huffman tables.
291 * The exact same statements apply for progressive JPEG: the default tables 278 * The exact same statements apply for progressive JPEG: the default tables
292 * don't work for progressive mode. (This may get fixed, however.) 279 * don't work for progressive mode. (This may get fixed, however.)
293 */ 280 */
294 #define INPUT_SMOOTHING_SUPPORTED /* Input image smoothing option? */ 281 #define INPUT_SMOOTHING_SUPPORTED /* Input image smoothing option? */
295 282
296 /* Decoder capability options: */ 283 /* Decoder capability options: */
297 284
298 #undef D_ARITH_CODING_SUPPORTED /* Arithmetic coding back end? */ 285 #undef D_ARITH_CODING_SUPPORTED /* Arithmetic coding back end? */
299 #define D_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */ 286 #define D_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */
300 #define D_PROGRESSIVE_SUPPORTED» /* Progressive JPEG? (Requires MULTISCAN)*/ 287 #define D_PROGRESSIVE_SUPPORTED /* Progressive JPEG? (Requires MULTISCAN)*/
301 #define SAVE_MARKERS_SUPPORTED» /* jpeg_save_markers() needed? */ 288 #define SAVE_MARKERS_SUPPORTED /* jpeg_save_markers() needed? */
302 #define BLOCK_SMOOTHING_SUPPORTED /* Block smoothing? (Progressive only) */ 289 #define BLOCK_SMOOTHING_SUPPORTED /* Block smoothing? (Progressive only) */
303 #define IDCT_SCALING_SUPPORTED» /* Output rescaling via IDCT? */ 290 #define IDCT_SCALING_SUPPORTED /* Output rescaling via IDCT? */
304 #undef UPSAMPLE_SCALING_SUPPORTED /* Output rescaling at upsample stage? */ 291 #undef UPSAMPLE_SCALING_SUPPORTED /* Output rescaling at upsample stage? */
305 #define UPSAMPLE_MERGING_SUPPORTED /* Fast path for sloppy upsampling? */ 292 #define UPSAMPLE_MERGING_SUPPORTED /* Fast path for sloppy upsampling? */
306 #undef QUANT_1PASS_SUPPORTED» /* 1-pass color quantization? */ 293 #undef QUANT_1PASS_SUPPORTED /* 1-pass color quantization? */
307 #undef QUANT_2PASS_SUPPORTED» /* 2-pass color quantization? */ 294 #undef QUANT_2PASS_SUPPORTED /* 2-pass color quantization? */
308 295
309 /* more capability options later, no doubt */ 296 /* more capability options later, no doubt */
310 297
311
312 /* 298 /*
313 * Ordering of RGB data in scanlines passed to or from the application. 299 * Ordering of RGB data in scanlines passed to or from the application.
314 * If your application wants to deal with data in the order B,G,R, just 300 * If your application wants to deal with data in the order B,G,R, just
315 * change these macros. You can also deal with formats such as R,G,B,X 301 * change these macros. You can also deal with formats such as R,G,B,X
316 * (one extra byte per pixel) by changing RGB_PIXELSIZE. Note that changing 302 * (one extra byte per pixel) by changing RGB_PIXELSIZE. Note that changing
317 * the offsets will also change the order in which colormap data is organized. 303 * the offsets will also change the order in which colormap data is organized.
318 * RESTRICTIONS: 304 * RESTRICTIONS:
319 * 1. The sample applications cjpeg,djpeg do NOT support modified RGB formats. 305 * 1. The sample applications cjpeg,djpeg do NOT support modified RGB formats.
320 * 2. These macros only affect RGB<=>YCbCr color conversion, so they are not 306 * 2. These macros only affect RGB<=>YCbCr color conversion, so they are not
321 * useful if you are using JPEG color spaces other than YCbCr or grayscale. 307 * useful if you are using JPEG color spaces other than YCbCr or grayscale.
322 * 3. The color quantizer modules will not behave desirably if RGB_PIXELSIZE 308 * 3. The color quantizer modules will not behave desirably if RGB_PIXELSIZE
323 * is not 3 (they don't understand about dummy color components!). So you 309 * is not 3 (they don't understand about dummy color components!). So you
324 * can't use color quantization if you change that value. 310 * can't use color quantization if you change that value.
325 */ 311 */
326 312
327 #define RGB_RED»» 0» /* Offset of Red in an RGB scanline element */ 313 #define RGB_RED 0 /* Offset of Red in an RGB scanline element */
328 #define RGB_GREEN» 1» /* Offset of Green */ 314 #define RGB_GREEN 1 /* Offset of Green */
329 #define RGB_BLUE» 2» /* Offset of Blue */ 315 #define RGB_BLUE 2 /* Offset of Blue */
330 #define RGB_PIXELSIZE» 3» /* JSAMPLEs per RGB scanline element */ 316 #define RGB_PIXELSIZE 3 /* JSAMPLEs per RGB scanline element */
331
332 317
333 /* Definitions for speed-related optimizations. */ 318 /* Definitions for speed-related optimizations. */
334 319
335
336 /* If your compiler supports inline functions, define INLINE 320 /* If your compiler supports inline functions, define INLINE
337 * as the inline keyword; otherwise define it as empty. 321 * as the inline keyword; otherwise define it as empty.
338 */ 322 */
339 323
340 #ifndef INLINE 324 #ifndef INLINE
341 #ifdef __GNUC__»» » /* for instance, GNU C knows about inline */ 325 #ifdef __GNUC__ /* for instance, GNU C knows about inline */
342 #define INLINE __inline__ 326 #define INLINE __inline__
343 #endif 327 #endif
344 #ifndef INLINE 328 #ifndef INLINE
345 #define INLINE» » » /* default is to define it as empty */ 329 #define INLINE /* default is to define it as empty */
346 #endif 330 #endif
347 #endif 331 #endif
348 332
349
350 /* On some machines (notably 68000 series) "int" is 32 bits, but multiplying 333 /* On some machines (notably 68000 series) "int" is 32 bits, but multiplying
351 * two 16-bit shorts is faster than multiplying two ints. Define MULTIPLIER 334 * two 16-bit shorts is faster than multiplying two ints. Define MULTIPLIER
352 * as short on such a machine. MULTIPLIER must be at least 16 bits wide. 335 * as short on such a machine. MULTIPLIER must be at least 16 bits wide.
353 */ 336 */
354 337
355 #ifndef MULTIPLIER 338 #ifndef MULTIPLIER
356 #define MULTIPLIER int»» /* type for fastest integer multiply */ 339 #define MULTIPLIER int /* type for fastest integer multiply */
357 #endif 340 #endif
358 341
359
360 /* FAST_FLOAT should be either float or double, whichever is done faster 342 /* FAST_FLOAT should be either float or double, whichever is done faster
361 * by your compiler. (Note that this type is only used in the floating point 343 * by your compiler. (Note that this type is only used in the floating point
362 * DCT routines, so it only matters if you've defined DCT_FLOAT_SUPPORTED.) 344 * DCT routines, so it only matters if you've defined DCT_FLOAT_SUPPORTED.)
363 * Typically, float is faster in ANSI C compilers, while double is faster in 345 * Typically, float is faster in ANSI C compilers, while double is faster in
364 * pre-ANSI compilers (because they insist on converting to double anyway). 346 * pre-ANSI compilers (because they insist on converting to double anyway).
365 * The code below therefore chooses float if we have ANSI-style prototypes. 347 * The code below therefore chooses float if we have ANSI-style prototypes.
366 */ 348 */
367 349
368 #ifndef FAST_FLOAT 350 #ifndef FAST_FLOAT
369 #ifdef HAVE_PROTOTYPES 351 #ifdef HAVE_PROTOTYPES
370 #define FAST_FLOAT float 352 #define FAST_FLOAT float
371 #else 353 #else
372 #define FAST_FLOAT double 354 #define FAST_FLOAT double
373 #endif 355 #endif
374 #endif 356 #endif
375 357
376 #endif /* JPEG_INTERNAL_OPTIONS */ 358 #endif /* JPEG_INTERNAL_OPTIONS */
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