| 1 | ␍␊ |
| 2 | /* pngconf.h - machine configurable file for libpng␍␊ |
| 3 | *␍␊ |
| 4 | * libpng version 1.5.13 - September 27, 2012␍␊ |
| 5 | *␍␊ |
| 6 | * Copyright (c) 1998-2012 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 | #ifndef PNG_BUILDING_SYMBOL_TABLE␍␊ |
| 26 | /* PNG_NO_LIMITS_H may be used to turn off the use of the standard C␍␊ |
| 27 | * definition file for machine specific limits, this may impact the␍␊ |
| 28 | * correctness of the definitions below (see uses of INT_MAX).␍␊ |
| 29 | */␍␊ |
| 30 | # ifndef PNG_NO_LIMITS_H␍␊ |
| 31 | # include <limits.h>␍␊ |
| 32 | # endif␍␊ |
| 33 | ␍␊ |
| 34 | #endif␍␊ |
| 35 | ␍␊ |
| 36 | /* This controls optimization of the reading of 16 and 32 bit values␍␊ |
| 37 | * from PNG files. It can be set on a per-app-file basis - it␍␊ |
| 38 | * just changes whether a macro is used when the function is called.␍␊ |
| 39 | * The library builder sets the default; if read functions are not␍␊ |
| 40 | * built into the library the macro implementation is forced on.␍␊ |
| 41 | */␍␊ |
| 42 | #ifndef PNG_READ_INT_FUNCTIONS_SUPPORTED␍␊ |
| 43 | # define PNG_USE_READ_MACROS␍␊ |
| 44 | #endif␍␊ |
| 45 | #if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS)␍␊ |
| 46 | # if PNG_DEFAULT_READ_MACROS␍␊ |
| 47 | # define PNG_USE_READ_MACROS␍␊ |
| 48 | # endif␍␊ |
| 49 | #endif␍␊ |
| 50 | ␍␊ |
| 51 | /* COMPILER SPECIFIC OPTIONS.␍␊ |
| 52 | *␍␊ |
| 53 | * These options are provided so that a variety of difficult compilers␍␊ |
| 54 | * can be used. Some are fixed at build time (e.g. PNG_API_RULE␍␊ |
| 55 | * below) but still have compiler specific implementations, others␍␊ |
| 56 | * may be changed on a per-file basis when compiling against libpng.␍␊ |
| 57 | */␍␊ |
| 58 | ␍␊ |
| 59 | /* The PNGARG macro protects us against machines that don't have function␍␊ |
| 60 | * prototypes (ie K&R style headers). If your compiler does not handle␍␊ |
| 61 | * function prototypes, define this macro and use the included ansi2knr.␍␊ |
| 62 | * I've always been able to use _NO_PROTO as the indicator, but you may␍␊ |
| 63 | * need to drag the empty declaration out in front of here, or change the␍␊ |
| 64 | * ifdef to suit your own needs.␍␊ |
| 65 | */␍␊ |
| 66 | #ifndef PNGARG␍␊ |
| 67 | ␍␊ |
| 68 | # ifdef OF /* zlib prototype munger */␍␊ |
| 69 | # define PNGARG(arglist) OF(arglist)␍␊ |
| 70 | # else␍␊ |
| 71 | ␍␊ |
| 72 | # ifdef _NO_PROTO␍␊ |
| 73 | # define PNGARG(arglist) ()␍␊ |
| 74 | # else␍␊ |
| 75 | # define PNGARG(arglist) arglist␍␊ |
| 76 | # endif /* _NO_PROTO */␍␊ |
| 77 | ␍␊ |
| 78 | # endif /* OF */␍␊ |
| 79 | ␍␊ |
| 80 | #endif /* PNGARG */␍␊ |
| 81 | ␍␊ |
| 82 | /* Function calling conventions.␍␊ |
| 83 | * =============================␍␊ |
| 84 | * Normally it is not necessary to specify to the compiler how to call␍␊ |
| 85 | * a function - it just does it - however on x86 systems derived from␍␊ |
| 86 | * Microsoft and Borland C compilers ('IBM PC', 'DOS', 'Windows' systems␍␊ |
| 87 | * and some others) there are multiple ways to call a function and the␍␊ |
| 88 | * default can be changed on the compiler command line. For this reason␍␊ |
| 89 | * libpng specifies the calling convention of every exported function and␍␊ |
| 90 | * every function called via a user supplied function pointer. This is␍␊ |
| 91 | * done in this file by defining the following macros:␍␊ |
| 92 | *␍␊ |
| 93 | * PNGAPI Calling convention for exported functions.␍␊ |
| 94 | * PNGCBAPI Calling convention for user provided (callback) functions.␍␊ |
| 95 | * PNGCAPI Calling convention used by the ANSI-C library (required␍␊ |
| 96 | * for longjmp callbacks and sometimes used internally to␍␊ |
| 97 | * specify the calling convention for zlib).␍␊ |
| 98 | *␍␊ |
| 99 | * These macros should never be overridden. If it is necessary to␍␊ |
| 100 | * change calling convention in a private build this can be done␍␊ |
| 101 | * by setting PNG_API_RULE (which defaults to 0) to one of the values␍␊ |
| 102 | * below to select the correct 'API' variants.␍␊ |
| 103 | *␍␊ |
| 104 | * PNG_API_RULE=0 Use PNGCAPI - the 'C' calling convention - throughout.␍␊ |
| 105 | * This is correct in every known environment.␍␊ |
| 106 | * PNG_API_RULE=1 Use the operating system convention for PNGAPI and␍␊ |
| 107 | * the 'C' calling convention (from PNGCAPI) for␍␊ |
| 108 | * callbacks (PNGCBAPI). This is no longer required␍␊ |
| 109 | * in any known environment - if it has to be used␍␊ |
| 110 | * please post an explanation of the problem to the␍␊ |
| 111 | * libpng mailing list.␍␊ |
| 112 | *␍␊ |
| 113 | * These cases only differ if the operating system does not use the C␍␊ |
| 114 | * calling convention, at present this just means the above cases␍␊ |
| 115 | * (x86 DOS/Windows sytems) and, even then, this does not apply to␍␊ |
| 116 | * Cygwin running on those systems.␍␊ |
| 117 | *␍␊ |
| 118 | * Note that the value must be defined in pnglibconf.h so that what␍␊ |
| 119 | * the application uses to call the library matches the conventions␍␊ |
| 120 | * set when building the library.␍␊ |
| 121 | */␍␊ |
| 122 | ␍␊ |
| 123 | /* Symbol export␍␊ |
| 124 | * =============␍␊ |
| 125 | * When building a shared library it is almost always necessary to tell␍␊ |
| 126 | * the compiler which symbols to export. The png.h macro 'PNG_EXPORT'␍␊ |
| 127 | * is used to mark the symbols. On some systems these symbols can be␍␊ |
| 128 | * extracted at link time and need no special processing by the compiler,␍␊ |
| 129 | * on other systems the symbols are flagged by the compiler and just␍␊ |
| 130 | * the declaration requires a special tag applied (unfortunately) in a␍␊ |
| 131 | * compiler dependent way. Some systems can do either.␍␊ |
| 132 | *␍␊ |
| 133 | * A small number of older systems also require a symbol from a DLL to␍␊ |
| 134 | * be flagged to the program that calls it. This is a problem because␍␊ |
| 135 | * we do not know in the header file included by application code that␍␊ |
| 136 | * the symbol will come from a shared library, as opposed to a statically␍␊ |
| 137 | * linked one. For this reason the application must tell us by setting␍␊ |
| 138 | * the magic flag PNG_USE_DLL to turn on the special processing before␍␊ |
| 139 | * it includes png.h.␍␊ |
| 140 | *␍␊ |
| 141 | * Four additional macros are used to make this happen:␍␊ |
| 142 | *␍␊ |
| 143 | * PNG_IMPEXP The magic (if any) to cause a symbol to be exported from␍␊ |
| 144 | * the build or imported if PNG_USE_DLL is set - compiler␍␊ |
| 145 | * and system specific.␍␊ |
| 146 | *␍␊ |
| 147 | * PNG_EXPORT_TYPE(type) A macro that pre or appends PNG_IMPEXP to␍␊ |
| 148 | * 'type', compiler specific.␍␊ |
| 149 | *␍␊ |
| 150 | * PNG_DLL_EXPORT Set to the magic to use during a libpng build to␍␊ |
| 151 | * make a symbol exported from the DLL. Not used in the␍␊ |
| 152 | * public header files; see pngpriv.h for how it is used␍␊ |
| 153 | * in the libpng build.␍␊ |
| 154 | *␍␊ |
| 155 | * PNG_DLL_IMPORT Set to the magic to force the libpng symbols to come␍␊ |
| 156 | * from a DLL - used to define PNG_IMPEXP when␍␊ |
| 157 | * PNG_USE_DLL is set.␍␊ |
| 158 | */␍␊ |
| 159 | ␍␊ |
| 160 | /* System specific discovery.␍␊ |
| 161 | * ==========================␍␊ |
| 162 | * This code is used at build time to find PNG_IMPEXP, the API settings␍␊ |
| 163 | * and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL␍␊ |
| 164 | * import processing is possible. On Windows/x86 systems it also sets␍␊ |
| 165 | * compiler-specific macros to the values required to change the calling␍␊ |
| 166 | * conventions of the various functions.␍␊ |
| 167 | */␍␊ |
| 168 | #if ( defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\␍␊ |
| 169 | defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__) ) &&\␍␊ |
| 170 | ( defined(_X86_) || defined(_X64_) || defined(_M_IX86) ||\␍␊ |
| 171 | defined(_M_X64) || defined(_M_IA64) )␍␊ |
| 172 | /* Windows system (DOS doesn't support DLLs) running on x86/x64. Includes␍␊ |
| 173 | * builds under Cygwin or MinGW. Also includes Watcom builds but these need␍␊ |
| 174 | * special treatment because they are not compatible with GCC or Visual C␍␊ |
| 175 | * because of different calling conventions.␍␊ |
| 176 | */␍␊ |
| 177 | # if PNG_API_RULE == 2␍␊ |
| 178 | /* If this line results in an error, either because __watcall is not␍␊ |
| 179 | * understood or because of a redefine just below you cannot use *this*␍␊ |
| 180 | * build of the library with the compiler you are using. *This* build was␍␊ |
| 181 | * build using Watcom and applications must also be built using Watcom!␍␊ |
| 182 | */␍␊ |
| 183 | # define PNGCAPI __watcall␍␊ |
| 184 | # endif␍␊ |
| 185 | ␍␊ |
| 186 | # if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))␍␊ |
| 187 | # define PNGCAPI __cdecl␍␊ |
| 188 | # if PNG_API_RULE == 1␍␊ |
| 189 | # define PNGAPI __stdcall␍␊ |
| 190 | # endif␍␊ |
| 191 | # else␍␊ |
| 192 | /* An older compiler, or one not detected (erroneously) above,␍␊ |
| 193 | * if necessary override on the command line to get the correct␍␊ |
| 194 | * variants for the compiler.␍␊ |
| 195 | */␍␊ |
| 196 | # ifndef PNGCAPI␍␊ |
| 197 | # define PNGCAPI _cdecl␍␊ |
| 198 | # endif␍␊ |
| 199 | # if PNG_API_RULE == 1 && !defined(PNGAPI)␍␊ |
| 200 | # define PNGAPI _stdcall␍␊ |
| 201 | # endif␍␊ |
| 202 | # endif /* compiler/api */␍␊ |
| 203 | /* NOTE: PNGCBAPI always defaults to PNGCAPI. */␍␊ |
| 204 | ␍␊ |
| 205 | # if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD)␍␊ |
| 206 | ERROR: PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed␍␊ |
| 207 | # endif␍␊ |
| 208 | ␍␊ |
| 209 | # if (defined(_MSC_VER) && _MSC_VER < 800) ||\␍␊ |
| 210 | (defined(__BORLANDC__) && __BORLANDC__ < 0x500)␍␊ |
| 211 | /* older Borland and MSC␍␊ |
| 212 | * compilers used '__export' and required this to be after␍␊ |
| 213 | * the type.␍␊ |
| 214 | */␍␊ |
| 215 | # ifndef PNG_EXPORT_TYPE␍␊ |
| 216 | # define PNG_EXPORT_TYPE(type) type PNG_IMPEXP␍␊ |
| 217 | # endif␍␊ |
| 218 | # define PNG_DLL_EXPORT __export␍␊ |
| 219 | # else /* newer compiler */␍␊ |
| 220 | # define PNG_DLL_EXPORT __declspec(dllexport)␍␊ |
| 221 | # ifndef PNG_DLL_IMPORT␍␊ |
| 222 | # define PNG_DLL_IMPORT __declspec(dllimport)␍␊ |
| 223 | # endif␍␊ |
| 224 | # endif /* compiler */␍␊ |
| 225 | ␍␊ |
| 226 | #else /* !Windows/x86 */␍␊ |
| 227 | # if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)␍␊ |
| 228 | # define PNGAPI _System␍␊ |
| 229 | # else /* !Windows/x86 && !OS/2 */␍␊ |
| 230 | /* Use the defaults, or define PNG*API on the command line (but␍␊ |
| 231 | * this will have to be done for every compile!)␍␊ |
| 232 | */␍␊ |
| 233 | # endif /* other system, !OS/2 */␍␊ |
| 234 | #endif /* !Windows/x86 */␍␊ |
| 235 | ␍␊ |
| 236 | /* Now do all the defaulting . */␍␊ |
| 237 | #ifndef PNGCAPI␍␊ |
| 238 | # define PNGCAPI␍␊ |
| 239 | #endif␍␊ |
| 240 | #ifndef PNGCBAPI␍␊ |
| 241 | # define PNGCBAPI PNGCAPI␍␊ |
| 242 | #endif␍␊ |
| 243 | #ifndef PNGAPI␍␊ |
| 244 | # define PNGAPI PNGCAPI␍␊ |
| 245 | #endif␍␊ |
| 246 | ␍␊ |
| 247 | /* PNG_IMPEXP may be set on the compilation system command line or (if not set)␍␊ |
| 248 | * then in an internal header file when building the library, otherwise (when␍␊ |
| 249 | * using the library) it is set here.␍␊ |
| 250 | */␍␊ |
| 251 | #ifndef PNG_IMPEXP␍␊ |
| 252 | # if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT)␍␊ |
| 253 | /* This forces use of a DLL, disallowing static linking */␍␊ |
| 254 | # define PNG_IMPEXP PNG_DLL_IMPORT␍␊ |
| 255 | # endif␍␊ |
| 256 | ␍␊ |
| 257 | # ifndef PNG_IMPEXP␍␊ |
| 258 | # define PNG_IMPEXP␍␊ |
| 259 | # endif␍␊ |
| 260 | #endif␍␊ |
| 261 | ␍␊ |
| 262 | /* In 1.5.2 the definition of PNG_FUNCTION has been changed to always treat␍␊ |
| 263 | * 'attributes' as a storage class - the attributes go at the start of the␍␊ |
| 264 | * function definition, and attributes are always appended regardless of the␍␊ |
| 265 | * compiler. This considerably simplifies these macros but may cause problems␍␊ |
| 266 | * if any compilers both need function attributes and fail to handle them as␍␊ |
| 267 | * a storage class (this is unlikely.)␍␊ |
| 268 | */␍␊ |
| 269 | #ifndef PNG_FUNCTION␍␊ |
| 270 | # define PNG_FUNCTION(type, name, args, attributes) attributes type name args␍␊ |
| 271 | #endif␍␊ |
| 272 | ␍␊ |
| 273 | #ifndef PNG_EXPORT_TYPE␍␊ |
| 274 | # define PNG_EXPORT_TYPE(type) PNG_IMPEXP type␍␊ |
| 275 | #endif␍␊ |
| 276 | ␍␊ |
| 277 | /* The ordinal value is only relevant when preprocessing png.h for symbol␍␊ |
| 278 | * table entries, so we discard it here. See the .dfn files in the␍␊ |
| 279 | * scripts directory.␍␊ |
| 280 | */␍␊ |
| 281 | #ifndef PNG_EXPORTA␍␊ |
| 282 | ␍␊ |
| 283 | # define PNG_EXPORTA(ordinal, type, name, args, attributes)\␍␊ |
| 284 | PNG_FUNCTION(PNG_EXPORT_TYPE(type),(PNGAPI name),PNGARG(args), \␍␊ |
| 285 | extern attributes)␍␊ |
| 286 | #endif␍␊ |
| 287 | ␍␊ |
| 288 | /* ANSI-C (C90) does not permit a macro to be invoked with an empty argument,␍␊ |
| 289 | * so make something non-empty to satisfy the requirement:␍␊ |
| 290 | */␍␊ |
| 291 | #define PNG_EMPTY /*empty list*/␍␊ |
| 292 | ␍␊ |
| 293 | #define PNG_EXPORT(ordinal, type, name, args)\␍␊ |
| 294 | PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY)␍␊ |
| 295 | ␍␊ |
| 296 | /* Use PNG_REMOVED to comment out a removed interface. */␍␊ |
| 297 | #ifndef PNG_REMOVED␍␊ |
| 298 | # define PNG_REMOVED(ordinal, type, name, args, attributes)␍␊ |
| 299 | #endif␍␊ |
| 300 | ␍␊ |
| 301 | #ifndef PNG_CALLBACK␍␊ |
| 302 | # define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) PNGARG(args)␍␊ |
| 303 | #endif␍␊ |
| 304 | ␍␊ |
| 305 | /* Support for compiler specific function attributes. These are used␍␊ |
| 306 | * so that where compiler support is available incorrect use of API␍␊ |
| 307 | * functions in png.h will generate compiler warnings.␍␊ |
| 308 | *␍␊ |
| 309 | * Added at libpng-1.2.41.␍␊ |
| 310 | */␍␊ |
| 311 | ␍␊ |
| 312 | ␍␊ |
| 313 | #ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED␍␊ |
| 314 | /* Support for compiler specific function attributes. These are used␍␊ |
| 315 | * so that where compiler support is available incorrect use of API␍␊ |
| 316 | * functions in png.h will generate compiler warnings. Added at libpng␍␊ |
| 317 | * version 1.2.41.␍␊ |
| 318 | */␍␊ |
| 319 | # if defined(__GNUC__)␍␊ |
| 320 | # ifndef PNG_USE_RESULT␍␊ |
| 321 | # define PNG_USE_RESULT __attribute__((__warn_unused_result__))␍␊ |
| 322 | # endif␍␊ |
| 323 | # ifndef PNG_NORETURN␍␊ |
| 324 | # define PNG_NORETURN __attribute__((__noreturn__))␍␊ |
| 325 | # endif␍␊ |
| 326 | # if __GNUC__ >= 3␍␊ |
| 327 | # ifndef PNG_ALLOCATED␍␊ |
| 328 | # define PNG_ALLOCATED __attribute__((__malloc__))␍␊ |
| 329 | # endif␍␊ |
| 330 | # ifndef PNG_DEPRECATED␍␊ |
| 331 | # define PNG_DEPRECATED __attribute__((__deprecated__))␍␊ |
| 332 | # endif␍␊ |
| 333 | # ifndef PNG_PRIVATE␍␊ |
| 334 | # if 0 /* Doesn't work so we use deprecated instead*/␍␊ |
| 335 | # define PNG_PRIVATE \␍␊ |
| 336 | __attribute__((warning("This function is not exported by libpng.")))␍␊ |
| 337 | # else␍␊ |
| 338 | # define PNG_PRIVATE \␍␊ |
| 339 | __attribute__((__deprecated__))␍␊ |
| 340 | # endif␍␊ |
| 341 | # endif␍␊ |
| 342 | # endif /* __GNUC__ >= 3 */␍␊ |
| 343 | # endif /* __GNUC__ */␍␊ |
| 344 | ␍␊ |
| 345 | # if defined(_MSC_VER) && (_MSC_VER >= 1300)␍␊ |
| 346 | # ifndef PNG_USE_RESULT␍␊ |
| 347 | # define PNG_USE_RESULT /* not supported */␍␊ |
| 348 | # endif␍␊ |
| 349 | # ifndef PNG_NORETURN␍␊ |
| 350 | # define PNG_NORETURN __declspec(noreturn)␍␊ |
| 351 | # endif␍␊ |
| 352 | # ifndef PNG_ALLOCATED␍␊ |
| 353 | # if (_MSC_VER >= 1400)␍␊ |
| 354 | # define PNG_ALLOCATED __declspec(restrict)␍␊ |
| 355 | # endif␍␊ |
| 356 | # endif␍␊ |
| 357 | # ifndef PNG_DEPRECATED␍␊ |
| 358 | # define PNG_DEPRECATED __declspec(deprecated)␍␊ |
| 359 | # endif␍␊ |
| 360 | # ifndef PNG_PRIVATE␍␊ |
| 361 | # define PNG_PRIVATE __declspec(deprecated)␍␊ |
| 362 | # endif␍␊ |
| 363 | # endif /* _MSC_VER */␍␊ |
| 364 | #endif /* PNG_PEDANTIC_WARNINGS */␍␊ |
| 365 | ␍␊ |
| 366 | #ifndef PNG_DEPRECATED␍␊ |
| 367 | # define PNG_DEPRECATED /* Use of this function is deprecated */␍␊ |
| 368 | #endif␍␊ |
| 369 | #ifndef PNG_USE_RESULT␍␊ |
| 370 | # define PNG_USE_RESULT /* The result of this function must be checked */␍␊ |
| 371 | #endif␍␊ |
| 372 | #ifndef PNG_NORETURN␍␊ |
| 373 | # define PNG_NORETURN /* This function does not return */␍␊ |
| 374 | #endif␍␊ |
| 375 | #ifndef PNG_ALLOCATED␍␊ |
| 376 | # define PNG_ALLOCATED /* The result of the function is new memory */␍␊ |
| 377 | #endif␍␊ |
| 378 | #ifndef PNG_PRIVATE␍␊ |
| 379 | # define PNG_PRIVATE /* This is a private libpng function */␍␊ |
| 380 | #endif␍␊ |
| 381 | #ifndef PNG_FP_EXPORT /* A floating point API. */␍␊ |
| 382 | # ifdef PNG_FLOATING_POINT_SUPPORTED␍␊ |
| 383 | # define PNG_FP_EXPORT(ordinal, type, name, args)\␍␊ |
| 384 | PNG_EXPORT(ordinal, type, name, args);␍␊ |
| 385 | # else /* No floating point APIs */␍␊ |
| 386 | # define PNG_FP_EXPORT(ordinal, type, name, args)␍␊ |
| 387 | # endif␍␊ |
| 388 | #endif␍␊ |
| 389 | #ifndef PNG_FIXED_EXPORT /* A fixed point API. */␍␊ |
| 390 | # ifdef PNG_FIXED_POINT_SUPPORTED␍␊ |
| 391 | # define PNG_FIXED_EXPORT(ordinal, type, name, args)\␍␊ |
| 392 | PNG_EXPORT(ordinal, type, name, args);␍␊ |
| 393 | # else /* No fixed point APIs */␍␊ |
| 394 | # define PNG_FIXED_EXPORT(ordinal, type, name, args)␍␊ |
| 395 | # endif␍␊ |
| 396 | #endif␍␊ |
| 397 | ␍␊ |
| 398 | /* The following uses const char * instead of char * for error␍␊ |
| 399 | * and warning message functions, so some compilers won't complain.␍␊ |
| 400 | * If you do not want to use const, define PNG_NO_CONST here.␍␊ |
| 401 | *␍␊ |
| 402 | * This should not change how the APIs are called, so it can be done␍␊ |
| 403 | * on a per-file basis in the application.␍␊ |
| 404 | */␍␊ |
| 405 | #ifndef PNG_CONST␍␊ |
| 406 | # ifndef PNG_NO_CONST␍␊ |
| 407 | # define PNG_CONST const␍␊ |
| 408 | # else␍␊ |
| 409 | # define PNG_CONST␍␊ |
| 410 | # endif␍␊ |
| 411 | #endif␍␊ |
| 412 | ␍␊ |
| 413 | /* Some typedefs to get us started. These should be safe on most of the␍␊ |
| 414 | * common platforms. The typedefs should be at least as large as the␍␊ |
| 415 | * numbers suggest (a png_uint_32 must be at least 32 bits long), but they␍␊ |
| 416 | * don't have to be exactly that size. Some compilers dislike passing␍␊ |
| 417 | * unsigned shorts as function parameters, so you may be better off using␍␊ |
| 418 | * unsigned int for png_uint_16.␍␊ |
| 419 | */␍␊ |
| 420 | ␍␊ |
| 421 | #if defined(INT_MAX) && (INT_MAX > 0x7ffffffeL)␍␊ |
| 422 | typedef unsigned int png_uint_32;␍␊ |
| 423 | typedef int png_int_32;␍␊ |
| 424 | #else␍␊ |
| 425 | typedef unsigned long png_uint_32;␍␊ |
| 426 | typedef long png_int_32;␍␊ |
| 427 | #endif␍␊ |
| 428 | typedef unsigned short png_uint_16;␍␊ |
| 429 | typedef short png_int_16;␍␊ |
| 430 | typedef unsigned char png_byte;␍␊ |
| 431 | ␍␊ |
| 432 | #ifdef PNG_NO_SIZE_T␍␊ |
| 433 | typedef unsigned int png_size_t;␍␊ |
| 434 | #else␍␊ |
| 435 | typedef size_t png_size_t;␍␊ |
| 436 | #endif␍␊ |
| 437 | #define png_sizeof(x) (sizeof (x))␍␊ |
| 438 | ␍␊ |
| 439 | /* The following is needed for medium model support. It cannot be in the␍␊ |
| 440 | * pngpriv.h header. Needs modification for other compilers besides␍␊ |
| 441 | * MSC. Model independent support declares all arrays and pointers to be␍␊ |
| 442 | * large using the far keyword. The zlib version used must also support␍␊ |
| 443 | * model independent data. As of version zlib 1.0.4, the necessary changes␍␊ |
| 444 | * have been made in zlib. The USE_FAR_KEYWORD define triggers other␍␊ |
| 445 | * changes that are needed. (Tim Wegner)␍␊ |
| 446 | */␍␊ |
| 447 | ␍␊ |
| 448 | /* Separate compiler dependencies (problem here is that zlib.h always␍␊ |
| 449 | * defines FAR. (SJT)␍␊ |
| 450 | */␍␊ |
| 451 | #ifdef __BORLANDC__␍␊ |
| 452 | # if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)␍␊ |
| 453 | # define LDATA 1␍␊ |
| 454 | # else␍␊ |
| 455 | # define LDATA 0␍␊ |
| 456 | # endif␍␊ |
| 457 | /* GRR: why is Cygwin in here? Cygwin is not Borland C... */␍␊ |
| 458 | # if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)␍␊ |
| 459 | # define PNG_MAX_MALLOC_64K /* only used in build */␍␊ |
| 460 | # if (LDATA != 1)␍␊ |
| 461 | # ifndef FAR␍␊ |
| 462 | # define FAR __far␍␊ |
| 463 | # endif␍␊ |
| 464 | # define USE_FAR_KEYWORD␍␊ |
| 465 | # endif /* LDATA != 1 */␍␊ |
| 466 | /* Possibly useful for moving data out of default segment.␍␊ |
| 467 | * Uncomment it if you want. Could also define FARDATA as␍␊ |
| 468 | * const if your compiler supports it. (SJT)␍␊ |
| 469 | # define FARDATA FAR␍␊ |
| 470 | */␍␊ |
| 471 | # endif /* __WIN32__, __FLAT__, __CYGWIN__ */␍␊ |
| 472 | #endif /* __BORLANDC__ */␍␊ |
| 473 | ␍␊ |
| 474 | ␍␊ |
| 475 | /* Suggest testing for specific compiler first before testing for␍␊ |
| 476 | * FAR. The Watcom compiler defines both __MEDIUM__ and M_I86MM,␍␊ |
| 477 | * making reliance oncertain keywords suspect. (SJT)␍␊ |
| 478 | */␍␊ |
| 479 | ␍␊ |
| 480 | /* MSC Medium model */␍␊ |
| 481 | #ifdef FAR␍␊ |
| 482 | # ifdef M_I86MM␍␊ |
| 483 | # define USE_FAR_KEYWORD␍␊ |
| 484 | # define FARDATA FAR␍␊ |
| 485 | # include <dos.h>␍␊ |
| 486 | # endif␍␊ |
| 487 | #endif␍␊ |
| 488 | ␍␊ |
| 489 | /* SJT: default case */␍␊ |
| 490 | #ifndef FAR␍␊ |
| 491 | # define FAR␍␊ |
| 492 | #endif␍␊ |
| 493 | ␍␊ |
| 494 | /* At this point FAR is always defined */␍␊ |
| 495 | #ifndef FARDATA␍␊ |
| 496 | # define FARDATA␍␊ |
| 497 | #endif␍␊ |
| 498 | ␍␊ |
| 499 | /* Typedef for floating-point numbers that are converted␍␊ |
| 500 | * to fixed-point with a multiple of 100,000, e.g., gamma␍␊ |
| 501 | */␍␊ |
| 502 | typedef png_int_32 png_fixed_point;␍␊ |
| 503 | ␍␊ |
| 504 | /* Add typedefs for pointers */␍␊ |
| 505 | typedef void FAR * png_voidp;␍␊ |
| 506 | typedef PNG_CONST void FAR * png_const_voidp;␍␊ |
| 507 | typedef png_byte FAR * png_bytep;␍␊ |
| 508 | typedef PNG_CONST png_byte FAR * png_const_bytep;␍␊ |
| 509 | typedef png_uint_32 FAR * png_uint_32p;␍␊ |
| 510 | typedef PNG_CONST png_uint_32 FAR * png_const_uint_32p;␍␊ |
| 511 | typedef png_int_32 FAR * png_int_32p;␍␊ |
| 512 | typedef PNG_CONST png_int_32 FAR * png_const_int_32p;␍␊ |
| 513 | typedef png_uint_16 FAR * png_uint_16p;␍␊ |
| 514 | typedef PNG_CONST png_uint_16 FAR * png_const_uint_16p;␍␊ |
| 515 | typedef png_int_16 FAR * png_int_16p;␍␊ |
| 516 | typedef PNG_CONST png_int_16 FAR * png_const_int_16p;␍␊ |
| 517 | typedef char FAR * png_charp;␍␊ |
| 518 | typedef PNG_CONST char FAR * png_const_charp;␍␊ |
| 519 | typedef png_fixed_point FAR * png_fixed_point_p;␍␊ |
| 520 | typedef PNG_CONST png_fixed_point FAR * png_const_fixed_point_p;␍␊ |
| 521 | typedef png_size_t FAR * png_size_tp;␍␊ |
| 522 | typedef PNG_CONST png_size_t FAR * png_const_size_tp;␍␊ |
| 523 | ␍␊ |
| 524 | #ifdef PNG_STDIO_SUPPORTED␍␊ |
| 525 | typedef FILE * png_FILE_p;␍␊ |
| 526 | #endif␍␊ |
| 527 | ␍␊ |
| 528 | #ifdef PNG_FLOATING_POINT_SUPPORTED␍␊ |
| 529 | typedef double FAR * png_doublep;␍␊ |
| 530 | typedef PNG_CONST double FAR * png_const_doublep;␍␊ |
| 531 | #endif␍␊ |
| 532 | ␍␊ |
| 533 | /* Pointers to pointers; i.e. arrays */␍␊ |
| 534 | typedef png_byte FAR * FAR * png_bytepp;␍␊ |
| 535 | typedef png_uint_32 FAR * FAR * png_uint_32pp;␍␊ |
| 536 | typedef png_int_32 FAR * FAR * png_int_32pp;␍␊ |
| 537 | typedef png_uint_16 FAR * FAR * png_uint_16pp;␍␊ |
| 538 | typedef png_int_16 FAR * FAR * png_int_16pp;␍␊ |
| 539 | typedef PNG_CONST char FAR * FAR * png_const_charpp;␍␊ |
| 540 | typedef char FAR * FAR * png_charpp;␍␊ |
| 541 | typedef png_fixed_point FAR * FAR * png_fixed_point_pp;␍␊ |
| 542 | #ifdef PNG_FLOATING_POINT_SUPPORTED␍␊ |
| 543 | typedef double FAR * FAR * png_doublepp;␍␊ |
| 544 | #endif␍␊ |
| 545 | ␍␊ |
| 546 | /* Pointers to pointers to pointers; i.e., pointer to array */␍␊ |
| 547 | typedef char FAR * FAR * FAR * png_charppp;␍␊ |
| 548 | ␍␊ |
| 549 | /* png_alloc_size_t is guaranteed to be no smaller than png_size_t,␍␊ |
| 550 | * and no smaller than png_uint_32. Casts from png_size_t or png_uint_32␍␊ |
| 551 | * to png_alloc_size_t are not necessary; in fact, it is recommended␍␊ |
| 552 | * not to use them at all so that the compiler can complain when something␍␊ |
| 553 | * turns out to be problematic.␍␊ |
| 554 | * Casts in the other direction (from png_alloc_size_t to png_size_t or␍␊ |
| 555 | * png_uint_32) should be explicitly applied; however, we do not expect␍␊ |
| 556 | * to encounter practical situations that require such conversions.␍␊ |
| 557 | */␍␊ |
| 558 | #if defined(__TURBOC__) && !defined(__FLAT__)␍␊ |
| 559 | typedef unsigned long png_alloc_size_t;␍␊ |
| 560 | #else␍␊ |
| 561 | # if defined(_MSC_VER) && defined(MAXSEG_64K)␍␊ |
| 562 | typedef unsigned long png_alloc_size_t;␍␊ |
| 563 | # else␍␊ |
| 564 | /* This is an attempt to detect an old Windows system where (int) is␍␊ |
| 565 | * actually 16 bits, in that case png_malloc must have an argument with a␍␊ |
| 566 | * bigger size to accomodate the requirements of the library.␍␊ |
| 567 | */␍␊ |
| 568 | # if (defined(_Windows) || defined(_WINDOWS) || defined(_WINDOWS_)) && \␍␊ |
| 569 | (!defined(INT_MAX) || INT_MAX <= 0x7ffffffeL)␍␊ |
| 570 | typedef DWORD png_alloc_size_t;␍␊ |
| 571 | # else␍␊ |
| 572 | typedef png_size_t png_alloc_size_t;␍␊ |
| 573 | # endif␍␊ |
| 574 | # endif␍␊ |
| 575 | #endif␍␊ |
| 576 | ␍␊ |
| 577 | #endif /* PNGCONF_H */␍␊ |
| 578 | |
