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comparison: media/libpng/pngconf.h
media/libpng/pngconf.h
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| -1:000000000000 | 0:8c7ee09b7b93 |
|---|---|
| 1 | |
| 2 /* pngconf.h - machine configurable file for libpng | |
| 3 * | |
| 4 * libpng version 1.6.10 - March 6, 2014 | |
| 5 * | |
| 6 * Copyright (c) 1998-2013 Glenn Randers-Pehrson | |
| 7 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) | |
| 8 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) | |
| 9 * | |
| 10 * This code is released under the libpng license. | |
| 11 * For conditions of distribution and use, see the disclaimer | |
| 12 * and license in png.h | |
| 13 * | |
| 14 */ | |
| 15 | |
| 16 /* Any machine specific code is near the front of this file, so if you | |
| 17 * are configuring libpng for a machine, you may want to read the section | |
| 18 * starting here down to where it starts to typedef png_color, png_text, | |
| 19 * and png_info. | |
| 20 */ | |
| 21 | |
| 22 #ifndef PNGCONF_H | |
| 23 #define PNGCONF_H | |
| 24 | |
| 25 /* To do: Do all of this in scripts/pnglibconf.dfa */ | |
| 26 #ifdef PNG_SAFE_LIMITS_SUPPORTED | |
| 27 # ifdef PNG_USER_WIDTH_MAX | |
| 28 # undef PNG_USER_WIDTH_MAX | |
| 29 # define PNG_USER_WIDTH_MAX 1000000L | |
| 30 # endif | |
| 31 # ifdef PNG_USER_HEIGHT_MAX | |
| 32 # undef PNG_USER_HEIGHT_MAX | |
| 33 # define PNG_USER_HEIGHT_MAX 1000000L | |
| 34 # endif | |
| 35 # ifdef PNG_USER_CHUNK_MALLOC_MAX | |
| 36 # undef PNG_USER_CHUNK_MALLOC_MAX | |
| 37 # define PNG_USER_CHUNK_MALLOC_MAX 4000000L | |
| 38 # endif | |
| 39 # ifdef PNG_USER_CHUNK_CACHE_MAX | |
| 40 # undef PNG_USER_CHUNK_CACHE_MAX | |
| 41 # define PNG_USER_CHUNK_CACHE_MAX 128 | |
| 42 # endif | |
| 43 #endif | |
| 44 | |
| 45 #ifndef PNG_BUILDING_SYMBOL_TABLE /* else includes may cause problems */ | |
| 46 | |
| 47 /* From libpng 1.6.0 libpng requires an ANSI X3.159-1989 ("ISOC90") compliant C | |
| 48 * compiler for correct compilation. The following header files are required by | |
| 49 * the standard. If your compiler doesn't provide these header files, or they | |
| 50 * do not match the standard, you will need to provide/improve them. | |
| 51 */ | |
| 52 #include <limits.h> | |
| 53 #include <stddef.h> | |
| 54 | |
| 55 /* Library header files. These header files are all defined by ISOC90; libpng | |
| 56 * expects conformant implementations, however, an ISOC90 conformant system need | |
| 57 * not provide these header files if the functionality cannot be implemented. | |
| 58 * In this case it will be necessary to disable the relevant parts of libpng in | |
| 59 * the build of pnglibconf.h. | |
| 60 * | |
| 61 * Prior to 1.6.0 string.h was included here; the API changes in 1.6.0 to not | |
| 62 * include this unnecessary header file. | |
| 63 */ | |
| 64 | |
| 65 #ifdef PNG_STDIO_SUPPORTED | |
| 66 /* Required for the definition of FILE: */ | |
| 67 # include <stdio.h> | |
| 68 #endif | |
| 69 | |
| 70 #ifdef PNG_SETJMP_SUPPORTED | |
| 71 /* Required for the definition of jmp_buf and the declaration of longjmp: */ | |
| 72 # include <setjmp.h> | |
| 73 #endif | |
| 74 | |
| 75 #ifdef PNG_CONVERT_tIME_SUPPORTED | |
| 76 /* Required for struct tm: */ | |
| 77 # include <time.h> | |
| 78 #endif | |
| 79 | |
| 80 #endif /* PNG_BUILDING_SYMBOL_TABLE */ | |
| 81 | |
| 82 /* Prior to 1.6.0 it was possible to turn off 'const' in declarations using | |
| 83 * PNG_NO_CONST; this is no longer supported except for data declarations which | |
| 84 * apparently still cause problems in 2011 on some compilers. | |
| 85 */ | |
| 86 #define PNG_CONST const /* backward compatibility only */ | |
| 87 | |
| 88 /* This controls optimization of the reading of 16 and 32 bit values | |
| 89 * from PNG files. It can be set on a per-app-file basis - it | |
| 90 * just changes whether a macro is used when the function is called. | |
| 91 * The library builder sets the default; if read functions are not | |
| 92 * built into the library the macro implementation is forced on. | |
| 93 */ | |
| 94 #ifndef PNG_READ_INT_FUNCTIONS_SUPPORTED | |
| 95 # define PNG_USE_READ_MACROS | |
| 96 #endif | |
| 97 #if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS) | |
| 98 # if PNG_DEFAULT_READ_MACROS | |
| 99 # define PNG_USE_READ_MACROS | |
| 100 # endif | |
| 101 #endif | |
| 102 | |
| 103 /* COMPILER SPECIFIC OPTIONS. | |
| 104 * | |
| 105 * These options are provided so that a variety of difficult compilers | |
| 106 * can be used. Some are fixed at build time (e.g. PNG_API_RULE | |
| 107 * below) but still have compiler specific implementations, others | |
| 108 * may be changed on a per-file basis when compiling against libpng. | |
| 109 */ | |
| 110 | |
| 111 /* The PNGARG macro was used in versions of libpng prior to 1.6.0 to protect | |
| 112 * against legacy (pre ISOC90) compilers that did not understand function | |
| 113 * prototypes. It is not required for modern C compilers. | |
| 114 */ | |
| 115 #ifndef PNGARG | |
| 116 # define PNGARG(arglist) arglist | |
| 117 #endif | |
| 118 | |
| 119 /* Function calling conventions. | |
| 120 * ============================= | |
| 121 * Normally it is not necessary to specify to the compiler how to call | |
| 122 * a function - it just does it - however on x86 systems derived from | |
| 123 * Microsoft and Borland C compilers ('IBM PC', 'DOS', 'Windows' systems | |
| 124 * and some others) there are multiple ways to call a function and the | |
| 125 * default can be changed on the compiler command line. For this reason | |
| 126 * libpng specifies the calling convention of every exported function and | |
| 127 * every function called via a user supplied function pointer. This is | |
| 128 * done in this file by defining the following macros: | |
| 129 * | |
| 130 * PNGAPI Calling convention for exported functions. | |
| 131 * PNGCBAPI Calling convention for user provided (callback) functions. | |
| 132 * PNGCAPI Calling convention used by the ANSI-C library (required | |
| 133 * for longjmp callbacks and sometimes used internally to | |
| 134 * specify the calling convention for zlib). | |
| 135 * | |
| 136 * These macros should never be overridden. If it is necessary to | |
| 137 * change calling convention in a private build this can be done | |
| 138 * by setting PNG_API_RULE (which defaults to 0) to one of the values | |
| 139 * below to select the correct 'API' variants. | |
| 140 * | |
| 141 * PNG_API_RULE=0 Use PNGCAPI - the 'C' calling convention - throughout. | |
| 142 * This is correct in every known environment. | |
| 143 * PNG_API_RULE=1 Use the operating system convention for PNGAPI and | |
| 144 * the 'C' calling convention (from PNGCAPI) for | |
| 145 * callbacks (PNGCBAPI). This is no longer required | |
| 146 * in any known environment - if it has to be used | |
| 147 * please post an explanation of the problem to the | |
| 148 * libpng mailing list. | |
| 149 * | |
| 150 * These cases only differ if the operating system does not use the C | |
| 151 * calling convention, at present this just means the above cases | |
| 152 * (x86 DOS/Windows sytems) and, even then, this does not apply to | |
| 153 * Cygwin running on those systems. | |
| 154 * | |
| 155 * Note that the value must be defined in pnglibconf.h so that what | |
| 156 * the application uses to call the library matches the conventions | |
| 157 * set when building the library. | |
| 158 */ | |
| 159 | |
| 160 /* Symbol export | |
| 161 * ============= | |
| 162 * When building a shared library it is almost always necessary to tell | |
| 163 * the compiler which symbols to export. The png.h macro 'PNG_EXPORT' | |
| 164 * is used to mark the symbols. On some systems these symbols can be | |
| 165 * extracted at link time and need no special processing by the compiler, | |
| 166 * on other systems the symbols are flagged by the compiler and just | |
| 167 * the declaration requires a special tag applied (unfortunately) in a | |
| 168 * compiler dependent way. Some systems can do either. | |
| 169 * | |
| 170 * A small number of older systems also require a symbol from a DLL to | |
| 171 * be flagged to the program that calls it. This is a problem because | |
| 172 * we do not know in the header file included by application code that | |
| 173 * the symbol will come from a shared library, as opposed to a statically | |
| 174 * linked one. For this reason the application must tell us by setting | |
| 175 * the magic flag PNG_USE_DLL to turn on the special processing before | |
| 176 * it includes png.h. | |
| 177 * | |
| 178 * Four additional macros are used to make this happen: | |
| 179 * | |
| 180 * PNG_IMPEXP The magic (if any) to cause a symbol to be exported from | |
| 181 * the build or imported if PNG_USE_DLL is set - compiler | |
| 182 * and system specific. | |
| 183 * | |
| 184 * PNG_EXPORT_TYPE(type) A macro that pre or appends PNG_IMPEXP to | |
| 185 * 'type', compiler specific. | |
| 186 * | |
| 187 * PNG_DLL_EXPORT Set to the magic to use during a libpng build to | |
| 188 * make a symbol exported from the DLL. Not used in the | |
| 189 * public header files; see pngpriv.h for how it is used | |
| 190 * in the libpng build. | |
| 191 * | |
| 192 * PNG_DLL_IMPORT Set to the magic to force the libpng symbols to come | |
| 193 * from a DLL - used to define PNG_IMPEXP when | |
| 194 * PNG_USE_DLL is set. | |
| 195 */ | |
| 196 | |
| 197 /* System specific discovery. | |
| 198 * ========================== | |
| 199 * This code is used at build time to find PNG_IMPEXP, the API settings | |
| 200 * and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL | |
| 201 * import processing is possible. On Windows systems it also sets | |
| 202 * compiler-specific macros to the values required to change the calling | |
| 203 * conventions of the various functions. | |
| 204 */ | |
| 205 #if defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\ | |
| 206 defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__) | |
| 207 /* Windows system (DOS doesn't support DLLs). Includes builds under Cygwin or | |
| 208 * MinGW on any architecture currently supported by Windows. Also includes | |
| 209 * Watcom builds but these need special treatment because they are not | |
| 210 * compatible with GCC or Visual C because of different calling conventions. | |
| 211 */ | |
| 212 # if PNG_API_RULE == 2 | |
| 213 /* If this line results in an error, either because __watcall is not | |
| 214 * understood or because of a redefine just below you cannot use *this* | |
| 215 * build of the library with the compiler you are using. *This* build was | |
| 216 * build using Watcom and applications must also be built using Watcom! | |
| 217 */ | |
| 218 # define PNGCAPI __watcall | |
| 219 # endif | |
| 220 | |
| 221 # if defined(__GNUC__) || (defined(_MSC_VER) && (_MSC_VER >= 800)) | |
| 222 # define PNGCAPI __cdecl | |
| 223 # if PNG_API_RULE == 1 | |
| 224 /* If this line results in an error __stdcall is not understood and | |
| 225 * PNG_API_RULE should not have been set to '1'. | |
| 226 */ | |
| 227 # define PNGAPI __stdcall | |
| 228 # endif | |
| 229 # else | |
| 230 /* An older compiler, or one not detected (erroneously) above, | |
| 231 * if necessary override on the command line to get the correct | |
| 232 * variants for the compiler. | |
| 233 */ | |
| 234 # ifndef PNGCAPI | |
| 235 # define PNGCAPI _cdecl | |
| 236 # endif | |
| 237 # if PNG_API_RULE == 1 && !defined(PNGAPI) | |
| 238 # define PNGAPI _stdcall | |
| 239 # endif | |
| 240 # endif /* compiler/api */ | |
| 241 | |
| 242 /* NOTE: PNGCBAPI always defaults to PNGCAPI. */ | |
| 243 | |
| 244 # if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD) | |
| 245 # error "PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed" | |
| 246 # endif | |
| 247 | |
| 248 # if (defined(_MSC_VER) && _MSC_VER < 800) ||\ | |
| 249 (defined(__BORLANDC__) && __BORLANDC__ < 0x500) | |
| 250 /* older Borland and MSC | |
| 251 * compilers used '__export' and required this to be after | |
| 252 * the type. | |
| 253 */ | |
| 254 # ifndef PNG_EXPORT_TYPE | |
| 255 # define PNG_EXPORT_TYPE(type) type PNG_IMPEXP | |
| 256 # endif | |
| 257 # define PNG_DLL_EXPORT __export | |
| 258 # else /* newer compiler */ | |
| 259 # define PNG_DLL_EXPORT __declspec(dllexport) | |
| 260 # ifndef PNG_DLL_IMPORT | |
| 261 # define PNG_DLL_IMPORT __declspec(dllimport) | |
| 262 # endif | |
| 263 # endif /* compiler */ | |
| 264 | |
| 265 #else /* !Windows */ | |
| 266 # if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__) | |
| 267 # define PNGAPI _System | |
| 268 # else /* !Windows/x86 && !OS/2 */ | |
| 269 /* Use the defaults, or define PNG*API on the command line (but | |
| 270 * this will have to be done for every compile!) | |
| 271 */ | |
| 272 # endif /* other system, !OS/2 */ | |
| 273 #endif /* !Windows/x86 */ | |
| 274 | |
| 275 /* Now do all the defaulting . */ | |
| 276 #ifndef PNGCAPI | |
| 277 # define PNGCAPI | |
| 278 #endif | |
| 279 #ifndef PNGCBAPI | |
| 280 # define PNGCBAPI PNGCAPI | |
| 281 #endif | |
| 282 #ifndef PNGAPI | |
| 283 # define PNGAPI PNGCAPI | |
| 284 #endif | |
| 285 | |
| 286 /* PNG_IMPEXP may be set on the compilation system command line or (if not set) | |
| 287 * then in an internal header file when building the library, otherwise (when | |
| 288 * using the library) it is set here. | |
| 289 */ | |
| 290 #ifndef PNG_IMPEXP | |
| 291 # if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT) | |
| 292 /* This forces use of a DLL, disallowing static linking */ | |
| 293 # define PNG_IMPEXP PNG_DLL_IMPORT | |
| 294 # endif | |
| 295 | |
| 296 # ifndef PNG_IMPEXP | |
| 297 # define PNG_IMPEXP | |
| 298 # endif | |
| 299 #endif | |
| 300 | |
| 301 /* In 1.5.2 the definition of PNG_FUNCTION has been changed to always treat | |
| 302 * 'attributes' as a storage class - the attributes go at the start of the | |
| 303 * function definition, and attributes are always appended regardless of the | |
| 304 * compiler. This considerably simplifies these macros but may cause problems | |
| 305 * if any compilers both need function attributes and fail to handle them as | |
| 306 * a storage class (this is unlikely.) | |
| 307 */ | |
| 308 #ifndef PNG_FUNCTION | |
| 309 # define PNG_FUNCTION(type, name, args, attributes) attributes type name args | |
| 310 #endif | |
| 311 | |
| 312 #ifndef PNG_EXPORT_TYPE | |
| 313 # define PNG_EXPORT_TYPE(type) PNG_IMPEXP type | |
| 314 #endif | |
| 315 | |
| 316 /* The ordinal value is only relevant when preprocessing png.h for symbol | |
| 317 * table entries, so we discard it here. See the .dfn files in the | |
| 318 * scripts directory. | |
| 319 */ | |
| 320 #ifndef PNG_EXPORTA | |
| 321 | |
| 322 # define PNG_EXPORTA(ordinal, type, name, args, attributes)\ | |
| 323 PNG_FUNCTION(PNG_EXPORT_TYPE(type),(PNGAPI name),PNGARG(args), \ | |
| 324 extern attributes) | |
| 325 #endif | |
| 326 | |
| 327 /* ANSI-C (C90) does not permit a macro to be invoked with an empty argument, | |
| 328 * so make something non-empty to satisfy the requirement: | |
| 329 */ | |
| 330 #define PNG_EMPTY /*empty list*/ | |
| 331 | |
| 332 #define PNG_EXPORT(ordinal, type, name, args)\ | |
| 333 PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY) | |
| 334 | |
| 335 /* Use PNG_REMOVED to comment out a removed interface. */ | |
| 336 #ifndef PNG_REMOVED | |
| 337 # define PNG_REMOVED(ordinal, type, name, args, attributes) | |
| 338 #endif | |
| 339 | |
| 340 #ifndef PNG_CALLBACK | |
| 341 # define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) PNGARG(args) | |
| 342 #endif | |
| 343 | |
| 344 /* Support for compiler specific function attributes. These are used | |
| 345 * so that where compiler support is available incorrect use of API | |
| 346 * functions in png.h will generate compiler warnings. | |
| 347 * | |
| 348 * Added at libpng-1.2.41. | |
| 349 */ | |
| 350 | |
| 351 #ifndef PNG_NO_PEDANTIC_WARNINGS | |
| 352 # ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED | |
| 353 # define PNG_PEDANTIC_WARNINGS_SUPPORTED | |
| 354 # endif | |
| 355 #endif | |
| 356 | |
| 357 #ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED | |
| 358 /* Support for compiler specific function attributes. These are used | |
| 359 * so that where compiler support is available, incorrect use of API | |
| 360 * functions in png.h will generate compiler warnings. Added at libpng | |
| 361 * version 1.2.41. Disabling these removes the warnings but may also produce | |
| 362 * less efficient code. | |
| 363 */ | |
| 364 # if defined(__clang__) | |
| 365 /* Clang defines both __clang__ and __GNUC__. Check __clang__ first. */ | |
| 366 # if !defined(PNG_USE_RESULT) && __has_attribute(__warn_unused_result__) | |
| 367 # define PNG_USE_RESULT __attribute__((__warn_unused_result__)) | |
| 368 # endif | |
| 369 # if !defined(PNG_NORETURN) && __has_attribute(__noreturn__) | |
| 370 # define PNG_NORETURN __attribute__((__noreturn__)) | |
| 371 # endif | |
| 372 # if !defined(PNG_ALLOCATED) && __has_attribute(__malloc__) | |
| 373 # define PNG_ALLOCATED __attribute__((__malloc__)) | |
| 374 # endif | |
| 375 # if !defined(PNG_DEPRECATED) && __has_attribute(__deprecated__) | |
| 376 # define PNG_DEPRECATED __attribute__((__deprecated__)) | |
| 377 # endif | |
| 378 # if !defined(PNG_PRIVATE) | |
| 379 # ifdef __has_extension | |
| 380 # if __has_extension(attribute_unavailable_with_message) | |
| 381 # define PNG_PRIVATE __attribute__((__unavailable__(\ | |
| 382 "This function is not exported by libpng."))) | |
| 383 # endif | |
| 384 # endif | |
| 385 # endif | |
| 386 # ifndef PNG_RESTRICT | |
| 387 # define PNG_RESTRICT __restrict | |
| 388 # endif | |
| 389 | |
| 390 # elif defined(__GNUC__) | |
| 391 # ifndef PNG_USE_RESULT | |
| 392 # define PNG_USE_RESULT __attribute__((__warn_unused_result__)) | |
| 393 # endif | |
| 394 # ifndef PNG_NORETURN | |
| 395 # define PNG_NORETURN __attribute__((__noreturn__)) | |
| 396 # endif | |
| 397 # if __GNUC__ >= 3 | |
| 398 # ifndef PNG_ALLOCATED | |
| 399 # define PNG_ALLOCATED __attribute__((__malloc__)) | |
| 400 # endif | |
| 401 # ifndef PNG_DEPRECATED | |
| 402 # define PNG_DEPRECATED __attribute__((__deprecated__)) | |
| 403 # endif | |
| 404 # ifndef PNG_PRIVATE | |
| 405 # if 0 /* Doesn't work so we use deprecated instead*/ | |
| 406 # define PNG_PRIVATE \ | |
| 407 __attribute__((warning("This function is not exported by libpng."))) | |
| 408 # else | |
| 409 # define PNG_PRIVATE \ | |
| 410 __attribute__((__deprecated__)) | |
| 411 # endif | |
| 412 # endif | |
| 413 # if ((__GNUC__ > 3) || !defined(__GNUC_MINOR__) || (__GNUC_MINOR__ >= 1)) | |
| 414 # ifndef PNG_RESTRICT | |
| 415 # define PNG_RESTRICT __restrict | |
| 416 # endif | |
| 417 # endif /* __GNUC__.__GNUC_MINOR__ > 3.0 */ | |
| 418 # endif /* __GNUC__ >= 3 */ | |
| 419 | |
| 420 # elif defined(_MSC_VER) && (_MSC_VER >= 1300) | |
| 421 # ifndef PNG_USE_RESULT | |
| 422 # define PNG_USE_RESULT /* not supported */ | |
| 423 # endif | |
| 424 # ifndef PNG_NORETURN | |
| 425 # define PNG_NORETURN __declspec(noreturn) | |
| 426 # endif | |
| 427 # ifndef PNG_ALLOCATED | |
| 428 # if (_MSC_VER >= 1400) | |
| 429 # define PNG_ALLOCATED __declspec(restrict) | |
| 430 # endif | |
| 431 # endif | |
| 432 # ifndef PNG_DEPRECATED | |
| 433 # define PNG_DEPRECATED __declspec(deprecated) | |
| 434 # endif | |
| 435 # ifndef PNG_PRIVATE | |
| 436 # define PNG_PRIVATE __declspec(deprecated) | |
| 437 # endif | |
| 438 # ifndef PNG_RESTRICT | |
| 439 # if (_MSC_VER >= 1400) | |
| 440 # define PNG_RESTRICT __restrict | |
| 441 # endif | |
| 442 # endif | |
| 443 | |
| 444 # elif defined(__WATCOMC__) | |
| 445 # ifndef PNG_RESTRICT | |
| 446 # define PNG_RESTRICT __restrict | |
| 447 # endif | |
| 448 # endif | |
| 449 #endif /* PNG_PEDANTIC_WARNINGS */ | |
| 450 | |
| 451 #ifndef PNG_DEPRECATED | |
| 452 # define PNG_DEPRECATED /* Use of this function is deprecated */ | |
| 453 #endif | |
| 454 #ifndef PNG_USE_RESULT | |
| 455 # define PNG_USE_RESULT /* The result of this function must be checked */ | |
| 456 #endif | |
| 457 #ifndef PNG_NORETURN | |
| 458 # define PNG_NORETURN /* This function does not return */ | |
| 459 #endif | |
| 460 #ifndef PNG_ALLOCATED | |
| 461 # define PNG_ALLOCATED /* The result of the function is new memory */ | |
| 462 #endif | |
| 463 #ifndef PNG_PRIVATE | |
| 464 # define PNG_PRIVATE /* This is a private libpng function */ | |
| 465 #endif | |
| 466 #ifndef PNG_RESTRICT | |
| 467 # define PNG_RESTRICT /* The C99 "restrict" feature */ | |
| 468 #endif | |
| 469 | |
| 470 #ifndef PNG_FP_EXPORT /* A floating point API. */ | |
| 471 # ifdef PNG_FLOATING_POINT_SUPPORTED | |
| 472 # define PNG_FP_EXPORT(ordinal, type, name, args)\ | |
| 473 PNG_EXPORT(ordinal, type, name, args); | |
| 474 # else /* No floating point APIs */ | |
| 475 # define PNG_FP_EXPORT(ordinal, type, name, args) | |
| 476 # endif | |
| 477 #endif | |
| 478 #ifndef PNG_FIXED_EXPORT /* A fixed point API. */ | |
| 479 # ifdef PNG_FIXED_POINT_SUPPORTED | |
| 480 # define PNG_FIXED_EXPORT(ordinal, type, name, args)\ | |
| 481 PNG_EXPORT(ordinal, type, name, args); | |
| 482 # else /* No fixed point APIs */ | |
| 483 # define PNG_FIXED_EXPORT(ordinal, type, name, args) | |
| 484 # endif | |
| 485 #endif | |
| 486 | |
| 487 #ifndef PNG_BUILDING_SYMBOL_TABLE | |
| 488 /* Some typedefs to get us started. These should be safe on most of the common | |
| 489 * platforms. | |
| 490 * | |
| 491 * png_uint_32 and png_int_32 may, currently, be larger than required to hold a | |
| 492 * 32-bit value however this is not normally advisable. | |
| 493 * | |
| 494 * png_uint_16 and png_int_16 should always be two bytes in size - this is | |
| 495 * verified at library build time. | |
| 496 * | |
| 497 * png_byte must always be one byte in size. | |
| 498 * | |
| 499 * The checks below use constants from limits.h, as defined by the ISOC90 | |
| 500 * standard. | |
| 501 */ | |
| 502 #if CHAR_BIT == 8 && UCHAR_MAX == 255 | |
| 503 typedef unsigned char png_byte; | |
| 504 #else | |
| 505 # error "libpng requires 8 bit bytes" | |
| 506 #endif | |
| 507 | |
| 508 #if INT_MIN == -32768 && INT_MAX == 32767 | |
| 509 typedef int png_int_16; | |
| 510 #elif SHRT_MIN == -32768 && SHRT_MAX == 32767 | |
| 511 typedef short png_int_16; | |
| 512 #else | |
| 513 # error "libpng requires a signed 16 bit type" | |
| 514 #endif | |
| 515 | |
| 516 #if UINT_MAX == 65535 | |
| 517 typedef unsigned int png_uint_16; | |
| 518 #elif USHRT_MAX == 65535 | |
| 519 typedef unsigned short png_uint_16; | |
| 520 #else | |
| 521 # error "libpng requires an unsigned 16 bit type" | |
| 522 #endif | |
| 523 | |
| 524 #if INT_MIN < -2147483646 && INT_MAX > 2147483646 | |
| 525 typedef int png_int_32; | |
| 526 #elif LONG_MIN < -2147483646 && LONG_MAX > 2147483646 | |
| 527 typedef long int png_int_32; | |
| 528 #else | |
| 529 # error "libpng requires a signed 32 bit (or more) type" | |
| 530 #endif | |
| 531 | |
| 532 #if UINT_MAX > 4294967294 | |
| 533 typedef unsigned int png_uint_32; | |
| 534 #elif ULONG_MAX > 4294967294 | |
| 535 typedef unsigned long int png_uint_32; | |
| 536 #else | |
| 537 # error "libpng requires an unsigned 32 bit (or more) type" | |
| 538 #endif | |
| 539 | |
| 540 /* Prior to 1.6.0 it was possible to disable the use of size_t, 1.6.0, however, | |
| 541 * requires an ISOC90 compiler and relies on consistent behavior of sizeof. | |
| 542 */ | |
| 543 typedef size_t png_size_t; | |
| 544 typedef ptrdiff_t png_ptrdiff_t; | |
| 545 | |
| 546 /* libpng needs to know the maximum value of 'size_t' and this controls the | |
| 547 * definition of png_alloc_size_t, below. This maximum value of size_t limits | |
| 548 * but does not control the maximum allocations the library makes - there is | |
| 549 * direct application control of this through png_set_user_limits(). | |
| 550 */ | |
| 551 #ifndef PNG_SMALL_SIZE_T | |
| 552 /* Compiler specific tests for systems where size_t is known to be less than | |
| 553 * 32 bits (some of these systems may no longer work because of the lack of | |
| 554 * 'far' support; see above.) | |
| 555 */ | |
| 556 # if (defined(__TURBOC__) && !defined(__FLAT__)) ||\ | |
| 557 (defined(_MSC_VER) && defined(MAXSEG_64K)) | |
| 558 # define PNG_SMALL_SIZE_T | |
| 559 # endif | |
| 560 #endif | |
| 561 | |
| 562 /* png_alloc_size_t is guaranteed to be no smaller than png_size_t, and no | |
| 563 * smaller than png_uint_32. Casts from png_size_t or png_uint_32 to | |
| 564 * png_alloc_size_t are not necessary; in fact, it is recommended not to use | |
| 565 * them at all so that the compiler can complain when something turns out to be | |
| 566 * problematic. | |
| 567 * | |
| 568 * Casts in the other direction (from png_alloc_size_t to png_size_t or | |
| 569 * png_uint_32) should be explicitly applied; however, we do not expect to | |
| 570 * encounter practical situations that require such conversions. | |
| 571 * | |
| 572 * PNG_SMALL_SIZE_T must be defined if the maximum value of size_t is less than | |
| 573 * 4294967295 - i.e. less than the maximum value of png_uint_32. | |
| 574 */ | |
| 575 #ifdef PNG_SMALL_SIZE_T | |
| 576 typedef png_uint_32 png_alloc_size_t; | |
| 577 #else | |
| 578 typedef png_size_t png_alloc_size_t; | |
| 579 #endif | |
| 580 | |
| 581 /* Prior to 1.6.0 libpng offered limited support for Microsoft C compiler | |
| 582 * implementations of Intel CPU specific support of user-mode segmented address | |
| 583 * spaces, where 16-bit pointers address more than 65536 bytes of memory using | |
| 584 * separate 'segment' registers. The implementation requires two different | |
| 585 * types of pointer (only one of which includes the segment value.) | |
| 586 * | |
| 587 * If required this support is available in version 1.2 of libpng and may be | |
| 588 * available in versions through 1.5, although the correctness of the code has | |
| 589 * not been verified recently. | |
| 590 */ | |
| 591 | |
| 592 /* Typedef for floating-point numbers that are converted to fixed-point with a | |
| 593 * multiple of 100,000, e.g., gamma | |
| 594 */ | |
| 595 typedef png_int_32 png_fixed_point; | |
| 596 | |
| 597 /* Add typedefs for pointers */ | |
| 598 typedef void * png_voidp; | |
| 599 typedef const void * png_const_voidp; | |
| 600 typedef png_byte * png_bytep; | |
| 601 typedef const png_byte * png_const_bytep; | |
| 602 typedef png_uint_32 * png_uint_32p; | |
| 603 typedef const png_uint_32 * png_const_uint_32p; | |
| 604 typedef png_int_32 * png_int_32p; | |
| 605 typedef const png_int_32 * png_const_int_32p; | |
| 606 typedef png_uint_16 * png_uint_16p; | |
| 607 typedef const png_uint_16 * png_const_uint_16p; | |
| 608 typedef png_int_16 * png_int_16p; | |
| 609 typedef const png_int_16 * png_const_int_16p; | |
| 610 typedef char * png_charp; | |
| 611 typedef const char * png_const_charp; | |
| 612 typedef png_fixed_point * png_fixed_point_p; | |
| 613 typedef const png_fixed_point * png_const_fixed_point_p; | |
| 614 typedef png_size_t * png_size_tp; | |
| 615 typedef const png_size_t * png_const_size_tp; | |
| 616 | |
| 617 #ifdef PNG_STDIO_SUPPORTED | |
| 618 typedef FILE * png_FILE_p; | |
| 619 #endif | |
| 620 | |
| 621 #ifdef PNG_FLOATING_POINT_SUPPORTED | |
| 622 typedef double * png_doublep; | |
| 623 typedef const double * png_const_doublep; | |
| 624 #endif | |
| 625 | |
| 626 /* Pointers to pointers; i.e. arrays */ | |
| 627 typedef png_byte * * png_bytepp; | |
| 628 typedef png_uint_32 * * png_uint_32pp; | |
| 629 typedef png_int_32 * * png_int_32pp; | |
| 630 typedef png_uint_16 * * png_uint_16pp; | |
| 631 typedef png_int_16 * * png_int_16pp; | |
| 632 typedef const char * * png_const_charpp; | |
| 633 typedef char * * png_charpp; | |
| 634 typedef png_fixed_point * * png_fixed_point_pp; | |
| 635 #ifdef PNG_FLOATING_POINT_SUPPORTED | |
| 636 typedef double * * png_doublepp; | |
| 637 #endif | |
| 638 | |
| 639 /* Pointers to pointers to pointers; i.e., pointer to array */ | |
| 640 typedef char * * * png_charppp; | |
| 641 | |
| 642 #endif /* PNG_BUILDING_SYMBOL_TABLE */ | |
| 643 | |
| 644 #endif /* PNGCONF_H */ |
