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| 1 | |
| 2 /* pngconf.h - machine configurable file for libpng | |
| 3 * | |
| 4 * libpng version 1.6.20, December 3, 2015 | |
| 5 * | |
| 6 * Copyright (c) 1998-2015 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 * Any machine specific code is near the front of this file, so if you | |
| 15 * are configuring libpng for a machine, you may want to read the section | |
| 16 * starting here down to where it starts to typedef png_color, png_text, | |
| 17 * and png_info. | |
| 18 */ | |
| 19 | |
| 20 #ifndef PNGCONF_H | |
| 21 #define PNGCONF_H | |
| 22 | |
| 23 #ifndef PNG_BUILDING_SYMBOL_TABLE /* else includes may cause problems */ | |
| 24 | |
| 25 /* From libpng 1.6.0 libpng requires an ANSI X3.159-1989 ("ISOC90") compliant C | |
| 26 * compiler for correct compilation. The following header files are required by | |
| 27 * the standard. If your compiler doesn't provide these header files, or they | |
| 28 * do not match the standard, you will need to provide/improve them. | |
| 29 */ | |
| 30 #include <limits.h> | |
| 31 #include <stddef.h> | |
| 32 | |
| 33 /* Library header files. These header files are all defined by ISOC90; libpng | |
| 34 * expects conformant implementations, however, an ISOC90 conformant system need | |
| 35 * not provide these header files if the functionality cannot be implemented. | |
| 36 * In this case it will be necessary to disable the relevant parts of libpng in | |
| 37 * the build of pnglibconf.h. | |
| 38 * | |
| 39 * Prior to 1.6.0 string.h was included here; the API changes in 1.6.0 to not | |
| 40 * include this unnecessary header file. | |
| 41 */ | |
| 42 | |
| 43 #ifdef PNG_STDIO_SUPPORTED | |
| 44 /* Required for the definition of FILE: */ | |
| 45 # include <stdio.h> | |
| 46 #endif | |
| 47 | |
| 48 #ifdef PNG_SETJMP_SUPPORTED | |
| 49 /* Required for the definition of jmp_buf and the declaration of longjmp: */ | |
| 50 # include <setjmp.h> | |
| 51 #endif | |
| 52 | |
| 53 #ifdef PNG_CONVERT_tIME_SUPPORTED | |
| 54 /* Required for struct tm: */ | |
| 55 # include <time.h> | |
| 56 #endif | |
| 57 | |
| 58 #endif /* PNG_BUILDING_SYMBOL_TABLE */ | |
| 59 | |
| 60 /* Prior to 1.6.0 it was possible to turn off 'const' in declarations using | |
| 61 * PNG_NO_CONST; this is no longer supported except for data declarations which | |
| 62 * apparently still cause problems in 2011 on some compilers. | |
| 63 */ | |
| 64 #define PNG_CONST const /* backward compatibility only */ | |
| 65 | |
| 66 /* This controls optimization of the reading of 16-bit and 32-bit values | |
| 67 * from PNG files. It can be set on a per-app-file basis - it | |
| 68 * just changes whether a macro is used when the function is called. | |
| 69 * The library builder sets the default; if read functions are not | |
| 70 * built into the library the macro implementation is forced on. | |
| 71 */ | |
| 72 #ifndef PNG_READ_INT_FUNCTIONS_SUPPORTED | |
| 73 # define PNG_USE_READ_MACROS | |
| 74 #endif | |
| 75 #if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS) | |
| 76 # if PNG_DEFAULT_READ_MACROS | |
| 77 # define PNG_USE_READ_MACROS | |
| 78 # endif | |
| 79 #endif | |
| 80 | |
| 81 /* COMPILER SPECIFIC OPTIONS. | |
| 82 * | |
| 83 * These options are provided so that a variety of difficult compilers | |
| 84 * can be used. Some are fixed at build time (e.g. PNG_API_RULE | |
| 85 * below) but still have compiler specific implementations, others | |
| 86 * may be changed on a per-file basis when compiling against libpng. | |
| 87 */ | |
| 88 | |
| 89 /* The PNGARG macro was used in versions of libpng prior to 1.6.0 to protect | |
| 90 * against legacy (pre ISOC90) compilers that did not understand function | |
| 91 * prototypes. It is not required for modern C compilers. | |
| 92 */ | |
| 93 #ifndef PNGARG | |
| 94 # define PNGARG(arglist) arglist | |
| 95 #endif | |
| 96 | |
| 97 /* Function calling conventions. | |
| 98 * ============================= | |
| 99 * Normally it is not necessary to specify to the compiler how to call | |
| 100 * a function - it just does it - however on x86 systems derived from | |
| 101 * Microsoft and Borland C compilers ('IBM PC', 'DOS', 'Windows' systems | |
| 102 * and some others) there are multiple ways to call a function and the | |
| 103 * default can be changed on the compiler command line. For this reason | |
| 104 * libpng specifies the calling convention of every exported function and | |
| 105 * every function called via a user supplied function pointer. This is | |
| 106 * done in this file by defining the following macros: | |
| 107 * | |
| 108 * PNGAPI Calling convention for exported functions. | |
| 109 * PNGCBAPI Calling convention for user provided (callback) functions. | |
| 110 * PNGCAPI Calling convention used by the ANSI-C library (required | |
| 111 * for longjmp callbacks and sometimes used internally to | |
| 112 * specify the calling convention for zlib). | |
| 113 * | |
| 114 * These macros should never be overridden. If it is necessary to | |
| 115 * change calling convention in a private build this can be done | |
| 116 * by setting PNG_API_RULE (which defaults to 0) to one of the values | |
| 117 * below to select the correct 'API' variants. | |
| 118 * | |
| 119 * PNG_API_RULE=0 Use PNGCAPI - the 'C' calling convention - throughout. | |
| 120 * This is correct in every known environment. | |
| 121 * PNG_API_RULE=1 Use the operating system convention for PNGAPI and | |
| 122 * the 'C' calling convention (from PNGCAPI) for | |
| 123 * callbacks (PNGCBAPI). This is no longer required | |
| 124 * in any known environment - if it has to be used | |
| 125 * please post an explanation of the problem to the | |
| 126 * libpng mailing list. | |
| 127 * | |
| 128 * These cases only differ if the operating system does not use the C | |
| 129 * calling convention, at present this just means the above cases | |
| 130 * (x86 DOS/Windows sytems) and, even then, this does not apply to | |
| 131 * Cygwin running on those systems. | |
| 132 * | |
| 133 * Note that the value must be defined in pnglibconf.h so that what | |
| 134 * the application uses to call the library matches the conventions | |
| 135 * set when building the library. | |
| 136 */ | |
| 137 | |
| 138 /* Symbol export | |
| 139 * ============= | |
| 140 * When building a shared library it is almost always necessary to tell | |
| 141 * the compiler which symbols to export. The png.h macro 'PNG_EXPORT' | |
| 142 * is used to mark the symbols. On some systems these symbols can be | |
| 143 * extracted at link time and need no special processing by the compiler, | |
| 144 * on other systems the symbols are flagged by the compiler and just | |
| 145 * the declaration requires a special tag applied (unfortunately) in a | |
| 146 * compiler dependent way. Some systems can do either. | |
| 147 * | |
| 148 * A small number of older systems also require a symbol from a DLL to | |
| 149 * be flagged to the program that calls it. This is a problem because | |
| 150 * we do not know in the header file included by application code that | |
| 151 * the symbol will come from a shared library, as opposed to a statically | |
| 152 * linked one. For this reason the application must tell us by setting | |
| 153 * the magic flag PNG_USE_DLL to turn on the special processing before | |
| 154 * it includes png.h. | |
| 155 * | |
| 156 * Four additional macros are used to make this happen: | |
| 157 * | |
| 158 * PNG_IMPEXP The magic (if any) to cause a symbol to be exported from | |
| 159 * the build or imported if PNG_USE_DLL is set - compiler | |
| 160 * and system specific. | |
| 161 * | |
| 162 * PNG_EXPORT_TYPE(type) A macro that pre or appends PNG_IMPEXP to | |
| 163 * 'type', compiler specific. | |
| 164 * | |
| 165 * PNG_DLL_EXPORT Set to the magic to use during a libpng build to | |
| 166 * make a symbol exported from the DLL. Not used in the | |
| 167 * public header files; see pngpriv.h for how it is used | |
| 168 * in the libpng build. | |
| 169 * | |
| 170 * PNG_DLL_IMPORT Set to the magic to force the libpng symbols to come | |
| 171 * from a DLL - used to define PNG_IMPEXP when | |
| 172 * PNG_USE_DLL is set. | |
| 173 */ | |
| 174 | |
| 175 /* System specific discovery. | |
| 176 * ========================== | |
| 177 * This code is used at build time to find PNG_IMPEXP, the API settings | |
| 178 * and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL | |
| 179 * import processing is possible. On Windows systems it also sets | |
| 180 * compiler-specific macros to the values required to change the calling | |
| 181 * conventions of the various functions. | |
| 182 */ | |
| 183 #if defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\ | |
| 184 defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__) | |
| 185 /* Windows system (DOS doesn't support DLLs). Includes builds under Cygwin or | |
| 186 * MinGW on any architecture currently supported by Windows. Also includes | |
| 187 * Watcom builds but these need special treatment because they are not | |
| 188 * compatible with GCC or Visual C because of different calling conventions. | |
| 189 */ | |
| 190 # if PNG_API_RULE == 2 | |
| 191 /* If this line results in an error, either because __watcall is not | |
| 192 * understood or because of a redefine just below you cannot use *this* | |
| 193 * build of the library with the compiler you are using. *This* build was | |
| 194 * build using Watcom and applications must also be built using Watcom! | |
| 195 */ | |
| 196 # define PNGCAPI __watcall | |
| 197 # endif | |
| 198 | |
| 199 # if defined(__GNUC__) || (defined(_MSC_VER) && (_MSC_VER >= 800)) | |
| 200 # define PNGCAPI __cdecl | |
| 201 # if PNG_API_RULE == 1 | |
| 202 /* If this line results in an error __stdcall is not understood and | |
| 203 * PNG_API_RULE should not have been set to '1'. | |
| 204 */ | |
| 205 # define PNGAPI __stdcall | |
| 206 # endif | |
| 207 # else | |
| 208 /* An older compiler, or one not detected (erroneously) above, | |
| 209 * if necessary override on the command line to get the correct | |
| 210 * variants for the compiler. | |
| 211 */ | |
| 212 # ifndef PNGCAPI | |
| 213 # define PNGCAPI _cdecl | |
| 214 # endif | |
| 215 # if PNG_API_RULE == 1 && !defined(PNGAPI) | |
| 216 # define PNGAPI _stdcall | |
| 217 # endif | |
| 218 # endif /* compiler/api */ | |
| 219 | |
| 220 /* NOTE: PNGCBAPI always defaults to PNGCAPI. */ | |
| 221 | |
| 222 # if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD) | |
| 223 # error "PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed" | |
| 224 # endif | |
| 225 | |
| 226 # if (defined(_MSC_VER) && _MSC_VER < 800) ||\ | |
| 227 (defined(__BORLANDC__) && __BORLANDC__ < 0x500) | |
| 228 /* older Borland and MSC | |
| 229 * compilers used '__export' and required this to be after | |
| 230 * the type. | |
| 231 */ | |
| 232 # ifndef PNG_EXPORT_TYPE | |
| 233 # define PNG_EXPORT_TYPE(type) type PNG_IMPEXP | |
| 234 # endif | |
| 235 # define PNG_DLL_EXPORT __export | |
| 236 # else /* newer compiler */ | |
| 237 # define PNG_DLL_EXPORT __declspec(dllexport) | |
| 238 # ifndef PNG_DLL_IMPORT | |
| 239 # define PNG_DLL_IMPORT __declspec(dllimport) | |
| 240 # endif | |
| 241 # endif /* compiler */ | |
| 242 | |
| 243 #else /* !Windows */ | |
| 244 # if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__) | |
| 245 # define PNGAPI _System | |
| 246 # else /* !Windows/x86 && !OS/2 */ | |
| 247 /* Use the defaults, or define PNG*API on the command line (but | |
| 248 * this will have to be done for every compile!) | |
| 249 */ | |
| 250 # endif /* other system, !OS/2 */ | |
| 251 #endif /* !Windows/x86 */ | |
| 252 | |
| 253 /* Now do all the defaulting . */ | |
| 254 #ifndef PNGCAPI | |
| 255 # define PNGCAPI | |
| 256 #endif | |
| 257 #ifndef PNGCBAPI | |
| 258 # define PNGCBAPI PNGCAPI | |
| 259 #endif | |
| 260 #ifndef PNGAPI | |
| 261 # define PNGAPI PNGCAPI | |
| 262 #endif | |
| 263 | |
| 264 /* PNG_IMPEXP may be set on the compilation system command line or (if not set) | |
| 265 * then in an internal header file when building the library, otherwise (when | |
| 266 * using the library) it is set here. | |
| 267 */ | |
| 268 #ifndef PNG_IMPEXP | |
| 269 # if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT) | |
| 270 /* This forces use of a DLL, disallowing static linking */ | |
| 271 # define PNG_IMPEXP PNG_DLL_IMPORT | |
| 272 # endif | |
| 273 | |
| 274 # ifndef PNG_IMPEXP | |
| 275 # define PNG_IMPEXP | |
| 276 # endif | |
| 277 #endif | |
| 278 | |
| 279 /* In 1.5.2 the definition of PNG_FUNCTION has been changed to always treat | |
| 280 * 'attributes' as a storage class - the attributes go at the start of the | |
| 281 * function definition, and attributes are always appended regardless of the | |
| 282 * compiler. This considerably simplifies these macros but may cause problems | |
| 283 * if any compilers both need function attributes and fail to handle them as | |
| 284 * a storage class (this is unlikely.) | |
| 285 */ | |
| 286 #ifndef PNG_FUNCTION | |
| 287 # define PNG_FUNCTION(type, name, args, attributes) attributes type name args | |
| 288 #endif | |
| 289 | |
| 290 #ifndef PNG_EXPORT_TYPE | |
| 291 # define PNG_EXPORT_TYPE(type) PNG_IMPEXP type | |
| 292 #endif | |
| 293 | |
| 294 /* The ordinal value is only relevant when preprocessing png.h for symbol | |
| 295 * table entries, so we discard it here. See the .dfn files in the | |
| 296 * scripts directory. | |
| 297 */ | |
| 298 | |
| 299 #ifndef PNG_EXPORTA | |
| 300 # define PNG_EXPORTA(ordinal, type, name, args, attributes) \ | |
| 301 PNG_FUNCTION(PNG_EXPORT_TYPE(type), (PNGAPI name), PNGARG(args), \ | |
| 302 PNG_LINKAGE_API attributes) | |
| 303 #endif | |
| 304 | |
| 305 /* ANSI-C (C90) does not permit a macro to be invoked with an empty argument, | |
| 306 * so make something non-empty to satisfy the requirement: | |
| 307 */ | |
| 308 #define PNG_EMPTY /*empty list*/ | |
| 309 | |
| 310 #define PNG_EXPORT(ordinal, type, name, args) \ | |
| 311 PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY) | |
| 312 | |
| 313 /* Use PNG_REMOVED to comment out a removed interface. */ | |
| 314 #ifndef PNG_REMOVED | |
| 315 # define PNG_REMOVED(ordinal, type, name, args, attributes) | |
| 316 #endif | |
| 317 | |
| 318 #ifndef PNG_CALLBACK | |
| 319 # define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) PNGARG(args) | |
| 320 #endif | |
| 321 | |
| 322 /* Support for compiler specific function attributes. These are used | |
| 323 * so that where compiler support is available incorrect use of API | |
| 324 * functions in png.h will generate compiler warnings. | |
| 325 * | |
| 326 * Added at libpng-1.2.41. | |
| 327 */ | |
| 328 | |
| 329 #ifndef PNG_NO_PEDANTIC_WARNINGS | |
| 330 # ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED | |
| 331 # define PNG_PEDANTIC_WARNINGS_SUPPORTED | |
| 332 # endif | |
| 333 #endif | |
| 334 | |
| 335 #ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED | |
| 336 /* Support for compiler specific function attributes. These are used | |
| 337 * so that where compiler support is available, incorrect use of API | |
| 338 * functions in png.h will generate compiler warnings. Added at libpng | |
| 339 * version 1.2.41. Disabling these removes the warnings but may also produce | |
| 340 * less efficient code. | |
| 341 */ | |
| 342 # if defined(__clang__) && defined(__has_attribute) | |
| 343 /* Clang defines both __clang__ and __GNUC__. Check __clang__ first. */ | |
| 344 # if !defined(PNG_USE_RESULT) && __has_attribute(__warn_unused_result__) | |
| 345 # define PNG_USE_RESULT __attribute__((__warn_unused_result__)) | |
| 346 # endif | |
| 347 # if !defined(PNG_NORETURN) && __has_attribute(__noreturn__) | |
| 348 # define PNG_NORETURN __attribute__((__noreturn__)) | |
| 349 # endif | |
| 350 # if !defined(PNG_ALLOCATED) && __has_attribute(__malloc__) | |
| 351 # define PNG_ALLOCATED __attribute__((__malloc__)) | |
| 352 # endif | |
| 353 # if !defined(PNG_DEPRECATED) && __has_attribute(__deprecated__) | |
| 354 # define PNG_DEPRECATED __attribute__((__deprecated__)) | |
| 355 # endif | |
| 356 # if !defined(PNG_PRIVATE) | |
| 357 # ifdef __has_extension | |
| 358 # if __has_extension(attribute_unavailable_with_message) | |
| 359 # define PNG_PRIVATE __attribute__((__unavailable__(\ | |
| 360 "This function is not exported by libpng."))) | |
| 361 # endif | |
| 362 # endif | |
| 363 # endif | |
| 364 # ifndef PNG_RESTRICT | |
| 365 # define PNG_RESTRICT __restrict | |
| 366 # endif | |
| 367 | |
| 368 # elif defined(__GNUC__) | |
| 369 # ifndef PNG_USE_RESULT | |
| 370 # define PNG_USE_RESULT __attribute__((__warn_unused_result__)) | |
| 371 # endif | |
| 372 # ifndef PNG_NORETURN | |
| 373 # define PNG_NORETURN __attribute__((__noreturn__)) | |
| 374 # endif | |
| 375 # if __GNUC__ >= 3 | |
| 376 # ifndef PNG_ALLOCATED | |
| 377 # define PNG_ALLOCATED __attribute__((__malloc__)) | |
| 378 # endif | |
| 379 # ifndef PNG_DEPRECATED | |
| 380 # define PNG_DEPRECATED __attribute__((__deprecated__)) | |
| 381 # endif | |
| 382 # ifndef PNG_PRIVATE | |
| 383 # if 0 /* Doesn't work so we use deprecated instead*/ | |
| 384 # define PNG_PRIVATE \ | |
| 385 __attribute__((warning("This function is not exported by libpng."))) | |
| 386 # else | |
| 387 # define PNG_PRIVATE \ | |
| 388 __attribute__((__deprecated__)) | |
| 389 # endif | |
| 390 # endif | |
| 391 # if ((__GNUC__ > 3) || !defined(__GNUC_MINOR__) || (__GNUC_MINOR__ >= 1)) | |
| 392 # ifndef PNG_RESTRICT | |
| 393 # define PNG_RESTRICT __restrict | |
| 394 # endif | |
| 395 # endif /* __GNUC__.__GNUC_MINOR__ > 3.0 */ | |
| 396 # endif /* __GNUC__ >= 3 */ | |
| 397 | |
| 398 # elif defined(_MSC_VER) && (_MSC_VER >= 1300) | |
| 399 # ifndef PNG_USE_RESULT | |
| 400 # define PNG_USE_RESULT /* not supported */ | |
| 401 # endif | |
| 402 # ifndef PNG_NORETURN | |
| 403 # define PNG_NORETURN __declspec(noreturn) | |
| 404 # endif | |
| 405 # ifndef PNG_ALLOCATED | |
| 406 # if (_MSC_VER >= 1400) | |
| 407 # define PNG_ALLOCATED __declspec(restrict) | |
| 408 # endif | |
| 409 # endif | |
| 410 # ifndef PNG_DEPRECATED | |
| 411 # define PNG_DEPRECATED __declspec(deprecated) | |
| 412 # endif | |
| 413 # ifndef PNG_PRIVATE | |
| 414 # define PNG_PRIVATE __declspec(deprecated) | |
| 415 # endif | |
| 416 # ifndef PNG_RESTRICT | |
| 417 # if (_MSC_VER >= 1400) | |
| 418 # define PNG_RESTRICT __restrict | |
| 419 # endif | |
| 420 # endif | |
| 421 | |
| 422 # elif defined(__WATCOMC__) | |
| 423 # ifndef PNG_RESTRICT | |
| 424 # define PNG_RESTRICT __restrict | |
| 425 # endif | |
| 426 # endif | |
| 427 #endif /* PNG_PEDANTIC_WARNINGS */ | |
| 428 | |
| 429 #ifndef PNG_DEPRECATED | |
| 430 # define PNG_DEPRECATED /* Use of this function is deprecated */ | |
| 431 #endif | |
| 432 #ifndef PNG_USE_RESULT | |
| 433 # define PNG_USE_RESULT /* The result of this function must be checked */ | |
| 434 #endif | |
| 435 #ifndef PNG_NORETURN | |
| 436 # define PNG_NORETURN /* This function does not return */ | |
| 437 #endif | |
| 438 #ifndef PNG_ALLOCATED | |
| 439 # define PNG_ALLOCATED /* The result of the function is new memory */ | |
| 440 #endif | |
| 441 #ifndef PNG_PRIVATE | |
| 442 # define PNG_PRIVATE /* This is a private libpng function */ | |
| 443 #endif | |
| 444 #ifndef PNG_RESTRICT | |
| 445 # define PNG_RESTRICT /* The C99 "restrict" feature */ | |
| 446 #endif | |
| 447 | |
| 448 #ifndef PNG_FP_EXPORT /* A floating point API. */ | |
| 449 # ifdef PNG_FLOATING_POINT_SUPPORTED | |
| 450 # define PNG_FP_EXPORT(ordinal, type, name, args)\ | |
| 451 PNG_EXPORT(ordinal, type, name, args); | |
| 452 # else /* No floating point APIs */ | |
| 453 # define PNG_FP_EXPORT(ordinal, type, name, args) | |
| 454 # endif | |
| 455 #endif | |
| 456 #ifndef PNG_FIXED_EXPORT /* A fixed point API. */ | |
| 457 # ifdef PNG_FIXED_POINT_SUPPORTED | |
| 458 # define PNG_FIXED_EXPORT(ordinal, type, name, args)\ | |
| 459 PNG_EXPORT(ordinal, type, name, args); | |
| 460 # else /* No fixed point APIs */ | |
| 461 # define PNG_FIXED_EXPORT(ordinal, type, name, args) | |
| 462 # endif | |
| 463 #endif | |
| 464 | |
| 465 #ifndef PNG_BUILDING_SYMBOL_TABLE | |
| 466 /* Some typedefs to get us started. These should be safe on most of the common | |
| 467 * platforms. | |
| 468 * | |
| 469 * png_uint_32 and png_int_32 may, currently, be larger than required to hold a | |
| 470 * 32-bit value however this is not normally advisable. | |
| 471 * | |
| 472 * png_uint_16 and png_int_16 should always be two bytes in size - this is | |
| 473 * verified at library build time. | |
| 474 * | |
| 475 * png_byte must always be one byte in size. | |
| 476 * | |
| 477 * The checks below use constants from limits.h, as defined by the ISOC90 | |
| 478 * standard. | |
| 479 */ | |
| 480 #if CHAR_BIT == 8 && UCHAR_MAX == 255 | |
| 481 typedef unsigned char png_byte; | |
| 482 #else | |
| 483 # error "libpng requires 8-bit bytes" | |
| 484 #endif | |
| 485 | |
| 486 #if INT_MIN == -32768 && INT_MAX == 32767 | |
| 487 typedef int png_int_16; | |
| 488 #elif SHRT_MIN == -32768 && SHRT_MAX == 32767 | |
| 489 typedef short png_int_16; | |
| 490 #else | |
| 491 # error "libpng requires a signed 16-bit type" | |
| 492 #endif | |
| 493 | |
| 494 #if UINT_MAX == 65535 | |
| 495 typedef unsigned int png_uint_16; | |
| 496 #elif USHRT_MAX == 65535 | |
| 497 typedef unsigned short png_uint_16; | |
| 498 #else | |
| 499 # error "libpng requires an unsigned 16-bit type" | |
| 500 #endif | |
| 501 | |
| 502 #if INT_MIN < -2147483646 && INT_MAX > 2147483646 | |
| 503 typedef int png_int_32; | |
| 504 #elif LONG_MIN < -2147483646 && LONG_MAX > 2147483646 | |
| 505 typedef long int png_int_32; | |
| 506 #else | |
| 507 # error "libpng requires a signed 32-bit (or more) type" | |
| 508 #endif | |
| 509 | |
| 510 #if UINT_MAX > 4294967294 | |
| 511 typedef unsigned int png_uint_32; | |
| 512 #elif ULONG_MAX > 4294967294 | |
| 513 typedef unsigned long int png_uint_32; | |
| 514 #else | |
| 515 # error "libpng requires an unsigned 32-bit (or more) type" | |
| 516 #endif | |
| 517 | |
| 518 /* Prior to 1.6.0 it was possible to disable the use of size_t, 1.6.0, however, | |
| 519 * requires an ISOC90 compiler and relies on consistent behavior of sizeof. | |
| 520 */ | |
| 521 typedef size_t png_size_t; | |
| 522 typedef ptrdiff_t png_ptrdiff_t; | |
| 523 | |
| 524 /* libpng needs to know the maximum value of 'size_t' and this controls the | |
| 525 * definition of png_alloc_size_t, below. This maximum value of size_t limits | |
| 526 * but does not control the maximum allocations the library makes - there is | |
| 527 * direct application control of this through png_set_user_limits(). | |
| 528 */ | |
| 529 #ifndef PNG_SMALL_SIZE_T | |
| 530 /* Compiler specific tests for systems where size_t is known to be less than | |
| 531 * 32 bits (some of these systems may no longer work because of the lack of | |
| 532 * 'far' support; see above.) | |
| 533 */ | |
| 534 # if (defined(__TURBOC__) && !defined(__FLAT__)) ||\ | |
| 535 (defined(_MSC_VER) && defined(MAXSEG_64K)) | |
| 536 # define PNG_SMALL_SIZE_T | |
| 537 # endif | |
| 538 #endif | |
| 539 | |
| 540 /* png_alloc_size_t is guaranteed to be no smaller than png_size_t, and no | |
| 541 * smaller than png_uint_32. Casts from png_size_t or png_uint_32 to | |
| 542 * png_alloc_size_t are not necessary; in fact, it is recommended not to use | |
| 543 * them at all so that the compiler can complain when something turns out to be | |
| 544 * problematic. | |
| 545 * | |
| 546 * Casts in the other direction (from png_alloc_size_t to png_size_t or | |
| 547 * png_uint_32) should be explicitly applied; however, we do not expect to | |
| 548 * encounter practical situations that require such conversions. | |
| 549 * | |
| 550 * PNG_SMALL_SIZE_T must be defined if the maximum value of size_t is less than | |
| 551 * 4294967295 - i.e. less than the maximum value of png_uint_32. | |
| 552 */ | |
| 553 #ifdef PNG_SMALL_SIZE_T | |
| 554 typedef png_uint_32 png_alloc_size_t; | |
| 555 #else | |
| 556 typedef png_size_t png_alloc_size_t; | |
| 557 #endif | |
| 558 | |
| 559 /* Prior to 1.6.0 libpng offered limited support for Microsoft C compiler | |
| 560 * implementations of Intel CPU specific support of user-mode segmented address | |
| 561 * spaces, where 16-bit pointers address more than 65536 bytes of memory using | |
| 562 * separate 'segment' registers. The implementation requires two different | |
| 563 * types of pointer (only one of which includes the segment value.) | |
| 564 * | |
| 565 * If required this support is available in version 1.2 of libpng and may be | |
| 566 * available in versions through 1.5, although the correctness of the code has | |
| 567 * not been verified recently. | |
| 568 */ | |
| 569 | |
| 570 /* Typedef for floating-point numbers that are converted to fixed-point with a | |
| 571 * multiple of 100,000, e.g., gamma | |
| 572 */ | |
| 573 typedef png_int_32 png_fixed_point; | |
| 574 | |
| 575 /* Add typedefs for pointers */ | |
| 576 typedef void * png_voidp; | |
| 577 typedef const void * png_const_voidp; | |
| 578 typedef png_byte * png_bytep; | |
| 579 typedef const png_byte * png_const_bytep; | |
| 580 typedef png_uint_32 * png_uint_32p; | |
| 581 typedef const png_uint_32 * png_const_uint_32p; | |
| 582 typedef png_int_32 * png_int_32p; | |
| 583 typedef const png_int_32 * png_const_int_32p; | |
| 584 typedef png_uint_16 * png_uint_16p; | |
| 585 typedef const png_uint_16 * png_const_uint_16p; | |
| 586 typedef png_int_16 * png_int_16p; | |
| 587 typedef const png_int_16 * png_const_int_16p; | |
| 588 typedef char * png_charp; | |
| 589 typedef const char * png_const_charp; | |
| 590 typedef png_fixed_point * png_fixed_point_p; | |
| 591 typedef const png_fixed_point * png_const_fixed_point_p; | |
| 592 typedef png_size_t * png_size_tp; | |
| 593 typedef const png_size_t * png_const_size_tp; | |
| 594 | |
| 595 #ifdef PNG_STDIO_SUPPORTED | |
| 596 typedef FILE * png_FILE_p; | |
| 597 #endif | |
| 598 | |
| 599 #ifdef PNG_FLOATING_POINT_SUPPORTED | |
| 600 typedef double * png_doublep; | |
| 601 typedef const double * png_const_doublep; | |
| 602 #endif | |
| 603 | |
| 604 /* Pointers to pointers; i.e. arrays */ | |
| 605 typedef png_byte * * png_bytepp; | |
| 606 typedef png_uint_32 * * png_uint_32pp; | |
| 607 typedef png_int_32 * * png_int_32pp; | |
| 608 typedef png_uint_16 * * png_uint_16pp; | |
| 609 typedef png_int_16 * * png_int_16pp; | |
| 610 typedef const char * * png_const_charpp; | |
| 611 typedef char * * png_charpp; | |
| 612 typedef png_fixed_point * * png_fixed_point_pp; | |
| 613 #ifdef PNG_FLOATING_POINT_SUPPORTED | |
| 614 typedef double * * png_doublepp; | |
| 615 #endif | |
| 616 | |
| 617 /* Pointers to pointers to pointers; i.e., pointer to array */ | |
| 618 typedef char * * * png_charppp; | |
| 619 | |
| 620 #endif /* PNG_BUILDING_SYMBOL_TABLE */ | |
| 621 | |
| 622 #endif /* PNGCONF_H */ | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 1599513004:
XFA: Rename libpng to libpng16. (Closed)
Base URL: https://pdfium.googlesource.com/pdfium.git@xfa