release/src/router/libpng/pngconf.h

   1
   2 /* pngconf.h - machine configurable file for libpng
   3  *
   4  * libpng version 1.2.51 - February 6, 2014
   5  * Copyright (c) 1998-2013 Glenn Randers-Pehrson
   6  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
   7  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
   8  *
   9  * This code is released under the libpng license.
  10  * For conditions of distribution and use, see the disclaimer
  11  * and license in png.h
  12  */
  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 #define PNG_1_2_X
  24
  25 /*
  26  * PNG_USER_CONFIG has to be defined on the compiler command line. This
  27  * includes the resource compiler for Windows DLL configurations.
  28  */
  29 #ifdef PNG_USER_CONFIG
  30 #  ifndef PNG_USER_PRIVATEBUILD
  31 #    define PNG_USER_PRIVATEBUILD
  32 #  endif
  33 #include "pngusr.h"
  34 #endif
  35
  36 /* PNG_CONFIGURE_LIBPNG is set by the "configure" script. */
  37 #ifdef PNG_CONFIGURE_LIBPNG
  38 #ifdef HAVE_CONFIG_H
  39 #include "config.h"
  40 #endif
  41 #endif
  42
  43 /*
  44  * Added at libpng-1.2.8
  45  *
  46  * If you create a private DLL you need to define in "pngusr.h" the followings:
  47  * #define PNG_USER_PRIVATEBUILD <Describes by whom and why this version of
  48  *        the DLL was built>
  49  *  e.g. #define PNG_USER_PRIVATEBUILD "Build by MyCompany for xyz reasons."
  50  * #define PNG_USER_DLLFNAME_POSTFIX <two-letter postfix that serve to
  51  *        distinguish your DLL from those of the official release. These
  52  *        correspond to the trailing letters that come after the version
  53  *        number and must match your private DLL name>
  54  *  e.g. // private DLL "libpng13gx.dll"
  55  *       #define PNG_USER_DLLFNAME_POSTFIX "gx"
  56  *
  57  * The following macros are also at your disposal if you want to complete the
  58  * DLL VERSIONINFO structure.
  59  * - PNG_USER_VERSIONINFO_COMMENTS
  60  * - PNG_USER_VERSIONINFO_COMPANYNAME
  61  * - PNG_USER_VERSIONINFO_LEGALTRADEMARKS
  62  */
  63
  64 #ifdef __STDC__
  65 #ifdef SPECIALBUILD
  66 #  pragma message("PNG_LIBPNG_SPECIALBUILD (and deprecated SPECIALBUILD)\
  67  are now LIBPNG reserved macros. Use PNG_USER_PRIVATEBUILD instead.")
  68 #endif
  69
  70 #ifdef PRIVATEBUILD
  71 # pragma message("PRIVATEBUILD is deprecated.\
  72  Use PNG_USER_PRIVATEBUILD instead.")
  73 # define PNG_USER_PRIVATEBUILD PRIVATEBUILD
  74 #endif
  75 #endif /* __STDC__ */
  76
  77 #ifndef PNG_VERSION_INFO_ONLY
  78
  79 /* End of material added to libpng-1.2.8 */
  80
  81 /* Added at libpng-1.2.19, removed at libpng-1.2.20 because it caused trouble
  82    Restored at libpng-1.2.21 */
  83 #if !defined(PNG_NO_WARN_UNINITIALIZED_ROW) && \
  84     !defined(PNG_WARN_UNINITIALIZED_ROW)
  85 #  define PNG_WARN_UNINITIALIZED_ROW 1
  86 #endif
  87 /* End of material added at libpng-1.2.19/1.2.21 */
  88
  89 /* Added at libpng-1.2.51 (ported from 1.4.6) */
  90 #ifndef PNG_UNUSED
  91 /* Unused formal parameter warnings are silenced using the following macro
  92  * which is expected to have no bad effects on performance (optimizing
  93  * compilers will probably remove it entirely).  Note that if you replace
  94  * it with something other than whitespace, you must include the terminating
  95  * semicolon.
  96  */
  97 #  define PNG_UNUSED(param) (void)param;
  98 #endif
  99 /* End of material added to libpng-1.4.6 */
 100
 101 /* This is the size of the compression buffer, and thus the size of
 102  * an IDAT chunk.  Make this whatever size you feel is best for your
 103  * machine.  One of these will be allocated per png_struct.  When this
 104  * is full, it writes the data to the disk, and does some other
 105  * calculations.  Making this an extremely small size will slow
 106  * the library down, but you may want to experiment to determine
 107  * where it becomes significant, if you are concerned with memory
 108  * usage.  Note that zlib allocates at least 32Kb also.  For readers,
 109  * this describes the size of the buffer available to read the data in.
 110  * Unless this gets smaller than the size of a row (compressed),
 111  * it should not make much difference how big this is.
 112  */
 113
 114 #ifndef PNG_ZBUF_SIZE
 115 #  define PNG_ZBUF_SIZE 8192
 116 #endif
 117
 118 /* Enable if you want a write-only libpng */
 119
 120 #ifndef PNG_NO_READ_SUPPORTED
 121 #  define PNG_READ_SUPPORTED
 122 #endif
 123
 124 /* Enable if you want a read-only libpng */
 125
 126 #ifndef PNG_NO_WRITE_SUPPORTED
 127 #  define PNG_WRITE_SUPPORTED
 128 #endif
 129
 130 /* Enabled in 1.2.41. */
 131 #ifdef PNG_ALLOW_BENIGN_ERRORS
 132 #  define png_benign_error png_warning
 133 #  define png_chunk_benign_error png_chunk_warning
 134 #else
 135 #  ifndef PNG_BENIGN_ERRORS_SUPPORTED
 136 #    define png_benign_error png_error
 137 #    define png_chunk_benign_error png_chunk_error
 138 #  endif
 139 #endif
 140
 141 /* Added in libpng-1.2.41 */
 142 #if !defined(PNG_NO_WARNINGS) && !defined(PNG_WARNINGS_SUPPORTED)
 143 #  define PNG_WARNINGS_SUPPORTED
 144 #endif
 145
 146 #if !defined(PNG_NO_ERROR_TEXT) && !defined(PNG_ERROR_TEXT_SUPPORTED)
 147 #  define PNG_ERROR_TEXT_SUPPORTED
 148 #endif
 149
 150 #if !defined(PNG_NO_CHECK_cHRM) && !defined(PNG_CHECK_cHRM_SUPPORTED)
 151 #  define PNG_CHECK_cHRM_SUPPORTED
 152 #endif
 153
 154 /* Enabled by default in 1.2.0.  You can disable this if you don't need to
 155  * support PNGs that are embedded in MNG datastreams
 156  */
 157 #if !defined(PNG_1_0_X) && !defined(PNG_NO_MNG_FEATURES)
 158 #  ifndef PNG_MNG_FEATURES_SUPPORTED
 159 #    define PNG_MNG_FEATURES_SUPPORTED
 160 #  endif
 161 #endif
 162
 163 #ifndef PNG_NO_FLOATING_POINT_SUPPORTED
 164 #  ifndef PNG_FLOATING_POINT_SUPPORTED
 165 #    define PNG_FLOATING_POINT_SUPPORTED
 166 #  endif
 167 #endif
 168
 169 /* If you are running on a machine where you cannot allocate more
 170  * than 64K of memory at once, uncomment this.  While libpng will not
 171  * normally need that much memory in a chunk (unless you load up a very
 172  * large file), zlib needs to know how big of a chunk it can use, and
 173  * libpng thus makes sure to check any memory allocation to verify it
 174  * will fit into memory.
 175 #define PNG_MAX_MALLOC_64K
 176  */
 177 #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
 178 #  define PNG_MAX_MALLOC_64K
 179 #endif
 180
 181 /* Special munging to support doing things the 'cygwin' way:
 182  * 'Normal' png-on-win32 defines/defaults:
 183  *   PNG_BUILD_DLL -- building dll
 184  *   PNG_USE_DLL   -- building an application, linking to dll
 185  *   (no define)   -- building static library, or building an
 186  *                    application and linking to the static lib
 187  * 'Cygwin' defines/defaults:
 188  *   PNG_BUILD_DLL -- (ignored) building the dll
 189  *   (no define)   -- (ignored) building an application, linking to the dll
 190  *   PNG_STATIC    -- (ignored) building the static lib, or building an
 191  *                    application that links to the static lib.
 192  *   ALL_STATIC    -- (ignored) building various static libs, or building an
 193  *                    application that links to the static libs.
 194  * Thus,
 195  * a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and
 196  * this bit of #ifdefs will define the 'correct' config variables based on
 197  * that. If a cygwin user *wants* to define 'PNG_USE_DLL' that's okay, but
 198  * unnecessary.
 199  *
 200  * Also, the precedence order is:
 201  *   ALL_STATIC (since we can't #undef something outside our namespace)
 202  *   PNG_BUILD_DLL
 203  *   PNG_STATIC
 204  *   (nothing) == PNG_USE_DLL
 205  *
 206  * CYGWIN (2002-01-20): The preceding is now obsolete. With the advent
 207  *   of auto-import in binutils, we no longer need to worry about
 208  *   __declspec(dllexport) / __declspec(dllimport) and friends.  Therefore,
 209  *   we don't need to worry about PNG_STATIC or ALL_STATIC when it comes
 210  *   to __declspec() stuff.  However, we DO need to worry about
 211  *   PNG_BUILD_DLL and PNG_STATIC because those change some defaults
 212  *   such as CONSOLE_IO and whether GLOBAL_ARRAYS are allowed.
 213  */
 214 #ifdef __CYGWIN__
 215 #  ifdef ALL_STATIC
 216 #    ifdef PNG_BUILD_DLL
 217 #      undef PNG_BUILD_DLL
 218 #    endif
 219 #    ifdef PNG_USE_DLL
 220 #      undef PNG_USE_DLL
 221 #    endif
 222 #    ifdef PNG_DLL
 223 #      undef PNG_DLL
 224 #    endif
 225 #    ifndef PNG_STATIC
 226 #      define PNG_STATIC
 227 #    endif
 228 #  else
 229 #    ifdef PNG_BUILD_DLL
 230 #      ifdef PNG_STATIC
 231 #        undef PNG_STATIC
 232 #      endif
 233 #      ifdef PNG_USE_DLL
 234 #        undef PNG_USE_DLL
 235 #      endif
 236 #      ifndef PNG_DLL
 237 #        define PNG_DLL
 238 #      endif
 239 #    else
 240 #      ifdef PNG_STATIC
 241 #        ifdef PNG_USE_DLL
 242 #          undef PNG_USE_DLL
 243 #        endif
 244 #        ifdef PNG_DLL
 245 #          undef PNG_DLL
 246 #        endif
 247 #      else
 248 #        ifndef PNG_USE_DLL
 249 #          define PNG_USE_DLL
 250 #        endif
 251 #        ifndef PNG_DLL
 252 #          define PNG_DLL
 253 #        endif
 254 #      endif
 255 #    endif
 256 #  endif
 257 #endif
 258
 259 /* This protects us against compilers that run on a windowing system
 260  * and thus don't have or would rather us not use the stdio types:
 261  * stdin, stdout, and stderr.  The only one currently used is stderr
 262  * in png_error() and png_warning().  #defining PNG_NO_CONSOLE_IO will
 263  * prevent these from being compiled and used. #defining PNG_NO_STDIO
 264  * will also prevent these, plus will prevent the entire set of stdio
 265  * macros and functions (FILE *, printf, etc.) from being compiled and used,
 266  * unless (PNG_DEBUG > 0) has been #defined.
 267  *
 268  * #define PNG_NO_CONSOLE_IO
 269  * #define PNG_NO_STDIO
 270  */
 271
 272 #if !defined(PNG_NO_STDIO) && !defined(PNG_STDIO_SUPPORTED)
 273 #  define PNG_STDIO_SUPPORTED
 274 #endif
 275
 276 #ifdef _WIN32_WCE
 277 #  include <windows.h>
 278    /* Console I/O functions are not supported on WindowsCE */
 279 #  define PNG_NO_CONSOLE_IO
 280    /* abort() may not be supported on some/all Windows CE platforms */
 281 #  define PNG_ABORT() exit(-1)
 282 #  ifdef PNG_DEBUG
 283 #    undef PNG_DEBUG
 284 #  endif
 285 #endif
 286
 287 #ifdef PNG_BUILD_DLL
 288 #  ifndef PNG_CONSOLE_IO_SUPPORTED
 289 #    ifndef PNG_NO_CONSOLE_IO
 290 #      define PNG_NO_CONSOLE_IO
 291 #    endif
 292 #  endif
 293 #endif
 294
 295 #  ifdef PNG_NO_STDIO
 296 #    ifndef PNG_NO_CONSOLE_IO
 297 #      define PNG_NO_CONSOLE_IO
 298 #    endif
 299 #    ifdef PNG_DEBUG
 300 #      if (PNG_DEBUG > 0)
 301 #        include <stdio.h>
 302 #      endif
 303 #    endif
 304 #  else
 305 #    ifndef _WIN32_WCE
 306 /* "stdio.h" functions are not supported on WindowsCE */
 307 #      include <stdio.h>
 308 #    endif
 309 #  endif
 310
 311 #if !(defined PNG_NO_CONSOLE_IO) && !defined(PNG_CONSOLE_IO_SUPPORTED)
 312 #  define PNG_CONSOLE_IO_SUPPORTED
 313 #endif
 314
 315 /* This macro protects us against machines that don't have function
 316  * prototypes (ie K&R style headers).  If your compiler does not handle
 317  * function prototypes, define this macro and use the included ansi2knr.
 318  * I've always been able to use _NO_PROTO as the indicator, but you may
 319  * need to drag the empty declaration out in front of here, or change the
 320  * ifdef to suit your own needs.
 321  */
 322 #ifndef PNGARG
 323
 324 #ifdef OF /* zlib prototype munger */
 325 #  define PNGARG(arglist) OF(arglist)
 326 #else
 327
 328 #ifdef _NO_PROTO
 329 #  define PNGARG(arglist) ()
 330 #  ifndef PNG_TYPECAST_NULL
 331 #     define PNG_TYPECAST_NULL
 332 #  endif
 333 #else
 334 #  define PNGARG(arglist) arglist
 335 #endif /* _NO_PROTO */
 336
 337
 338 #endif /* OF */
 339
 340 #endif /* PNGARG */
 341
 342 /* Try to determine if we are compiling on a Mac.  Note that testing for
 343  * just __MWERKS__ is not good enough, because the Codewarrior is now used
 344  * on non-Mac platforms.
 345  */
 346 #ifndef MACOS
 347 #  if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
 348       defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC)
 349 #    define MACOS
 350 #  endif
 351 #endif
 352
 353 /* enough people need this for various reasons to include it here */
 354 #if !defined(MACOS) && !defined(RISCOS) && !defined(_WIN32_WCE)
 355 #  include <sys/types.h>
 356 #endif
 357
 358 #if !defined(PNG_SETJMP_NOT_SUPPORTED) && !defined(PNG_NO_SETJMP_SUPPORTED)
 359 #  define PNG_SETJMP_SUPPORTED
 360 #endif
 361
 362 #ifdef PNG_SETJMP_SUPPORTED
 363 /* This is an attempt to force a single setjmp behaviour on Linux.  If
 364  * the X config stuff didn't define _BSD_SOURCE we wouldn't need this.
 365  *
 366  * You can bypass this test if you know that your application uses exactly
 367  * the same setjmp.h that was included when libpng was built.  Only define
 368  * PNG_SKIP_SETJMP_CHECK while building your application, prior to the
 369  * application's '#include "png.h"'. Don't define PNG_SKIP_SETJMP_CHECK
 370  * while building a separate libpng library for general use.
 371  */
 372
 373 #  ifndef PNG_SKIP_SETJMP_CHECK
 374 #    ifdef __linux__
 375 #      ifdef _BSD_SOURCE
 376 #        define PNG_SAVE_BSD_SOURCE
 377 #        undef _BSD_SOURCE
 378 #      endif
 379 #      ifdef _SETJMP_H
 380        /* If you encounter a compiler error here, see the explanation
 381         * near the end of INSTALL.
 382         */
 383            __pngconf.h__ in libpng already includes setjmp.h;
 384            __dont__ include it again.;
 385 #      endif
 386 #    endif /* __linux__ */
 387 #  endif /* PNG_SKIP_SETJMP_CHECK */
 388
 389    /* include setjmp.h for error handling */
 390 #  include <setjmp.h>
 391
 392 #  ifdef __linux__
 393 #    ifdef PNG_SAVE_BSD_SOURCE
 394 #      ifndef _BSD_SOURCE
 395 #        define _BSD_SOURCE
 396 #      endif
 397 #      undef PNG_SAVE_BSD_SOURCE
 398 #    endif
 399 #  endif /* __linux__ */
 400 #endif /* PNG_SETJMP_SUPPORTED */
 401
 402 #ifdef BSD
 403 #  include <strings.h>
 404 #else
 405 #  include <string.h>
 406 #endif
 407
 408 /* Other defines for things like memory and the like can go here.  */
 409 #ifdef PNG_INTERNAL
 410
 411 #include <stdlib.h>
 412
 413 /* The functions exported by PNG_EXTERN are PNG_INTERNAL functions, which
 414  * aren't usually used outside the library (as far as I know), so it is
 415  * debatable if they should be exported at all.  In the future, when it is
 416  * possible to have run-time registry of chunk-handling functions, some of
 417  * these will be made available again.
 418 #define PNG_EXTERN extern
 419  */
 420 #define PNG_EXTERN
 421
 422 /* Other defines specific to compilers can go here.  Try to keep
 423  * them inside an appropriate ifdef/endif pair for portability.
 424  */
 425
 426 #ifdef PNG_FLOATING_POINT_SUPPORTED
 427 #  ifdef MACOS
 428      /* We need to check that <math.h> hasn't already been included earlier
 429       * as it seems it doesn't agree with <fp.h>, yet we should really use
 430       * <fp.h> if possible.
 431       */
 432 #    if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__)
 433 #      include <fp.h>
 434 #    endif
 435 #  else
 436 #    include <math.h>
 437 #  endif
 438 #  if defined(_AMIGA) && defined(__SASC) && defined(_M68881)
 439      /* Amiga SAS/C: We must include builtin FPU functions when compiling using
 440       * MATH=68881
 441       */
 442 #    include <m68881.h>
 443 #  endif
 444 #endif
 445
 446 /* Codewarrior on NT has linking problems without this. */
 447 #if (defined(__MWERKS__) && defined(WIN32)) || defined(__STDC__)
 448 #  define PNG_ALWAYS_EXTERN
 449 #endif
 450
 451 /* This provides the non-ANSI (far) memory allocation routines. */
 452 #if defined(__TURBOC__) && defined(__MSDOS__)
 453 #  include <mem.h>
 454 #  include <alloc.h>
 455 #endif
 456
 457 /* I have no idea why is this necessary... */
 458 #if defined(_MSC_VER) && (defined(WIN32) || defined(_Windows) || \
 459     defined(_WINDOWS) || defined(_WIN32) || defined(__WIN32__))
 460 #  include <malloc.h>
 461 #endif
 462
 463 /* This controls how fine the dithering gets.  As this allocates
 464  * a largish chunk of memory (32K), those who are not as concerned
 465  * with dithering quality can decrease some or all of these.
 466  */
 467 #ifndef PNG_DITHER_RED_BITS
 468 #  define PNG_DITHER_RED_BITS 5
 469 #endif
 470 #ifndef PNG_DITHER_GREEN_BITS
 471 #  define PNG_DITHER_GREEN_BITS 5
 472 #endif
 473 #ifndef PNG_DITHER_BLUE_BITS
 474 #  define PNG_DITHER_BLUE_BITS 5
 475 #endif
 476
 477 /* This controls how fine the gamma correction becomes when you
 478  * are only interested in 8 bits anyway.  Increasing this value
 479  * results in more memory being used, and more pow() functions
 480  * being called to fill in the gamma tables.  Don't set this value
 481  * less then 8, and even that may not work (I haven't tested it).
 482  */
 483
 484 #ifndef PNG_MAX_GAMMA_8
 485 #  define PNG_MAX_GAMMA_8 11
 486 #endif
 487
 488 /* This controls how much a difference in gamma we can tolerate before
 489  * we actually start doing gamma conversion.
 490  */
 491 #ifndef PNG_GAMMA_THRESHOLD
 492 #  define PNG_GAMMA_THRESHOLD 0.05
 493 #endif
 494
 495 #endif /* PNG_INTERNAL */
 496
 497 /* The following uses const char * instead of char * for error
 498  * and warning message functions, so some compilers won't complain.
 499  * If you do not want to use const, define PNG_NO_CONST here.
 500  */
 501
 502 #ifndef PNG_NO_CONST
 503 #  define PNG_CONST const
 504 #else
 505 #  define PNG_CONST
 506 #endif
 507
 508 /* The following defines give you the ability to remove code from the
 509  * library that you will not be using.  I wish I could figure out how to
 510  * automate this, but I can't do that without making it seriously hard
 511  * on the users.  So if you are not using an ability, change the #define
 512  * to and #undef, and that part of the library will not be compiled.  If
 513  * your linker can't find a function, you may want to make sure the
 514  * ability is defined here.  Some of these depend upon some others being
 515  * defined.  I haven't figured out all the interactions here, so you may
 516  * have to experiment awhile to get everything to compile.  If you are
 517  * creating or using a shared library, you probably shouldn't touch this,
 518  * as it will affect the size of the structures, and this will cause bad
 519  * things to happen if the library and/or application ever change.
 520  */
 521
 522 /* Any features you will not be using can be undef'ed here */
 523
 524 /* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user
 525  * to turn it off with "*TRANSFORMS_NOT_SUPPORTED" or *PNG_NO_*_TRANSFORMS
 526  * on the compile line, then pick and choose which ones to define without
 527  * having to edit this file. It is safe to use the *TRANSFORMS_NOT_SUPPORTED
 528  * if you only want to have a png-compliant reader/writer but don't need
 529  * any of the extra transformations.  This saves about 80 kbytes in a
 530  * typical installation of the library. (PNG_NO_* form added in version
 531  * 1.0.1c, for consistency)
 532  */
 533
 534 /* The size of the png_text structure changed in libpng-1.0.6 when
 535  * iTXt support was added.  iTXt support was turned off by default through
 536  * libpng-1.2.x, to support old apps that malloc the png_text structure
 537  * instead of calling png_set_text() and letting libpng malloc it.  It
 538  * will be turned on by default in libpng-1.4.0.
 539  */
 540
 541 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
 542 #  ifndef PNG_NO_iTXt_SUPPORTED
 543 #    define PNG_NO_iTXt_SUPPORTED
 544 #  endif
 545 #  ifndef PNG_NO_READ_iTXt
 546 #    define PNG_NO_READ_iTXt
 547 #  endif
 548 #  ifndef PNG_NO_WRITE_iTXt
 549 #    define PNG_NO_WRITE_iTXt
 550 #  endif
 551 #endif
 552
 553 #if !defined(PNG_NO_iTXt_SUPPORTED)
 554 #  if !defined(PNG_READ_iTXt_SUPPORTED) && !defined(PNG_NO_READ_iTXt)
 555 #    define PNG_READ_iTXt
 556 #  endif
 557 #  if !defined(PNG_WRITE_iTXt_SUPPORTED) && !defined(PNG_NO_WRITE_iTXt)
 558 #    define PNG_WRITE_iTXt
 559 #  endif
 560 #endif
 561
 562 /* The following support, added after version 1.0.0, can be turned off here en
 563  * masse by defining PNG_LEGACY_SUPPORTED in case you need binary compatibility
 564  * with old applications that require the length of png_struct and png_info
 565  * to remain unchanged.
 566  */
 567
 568 #ifdef PNG_LEGACY_SUPPORTED
 569 #  define PNG_NO_FREE_ME
 570 #  define PNG_NO_READ_UNKNOWN_CHUNKS
 571 #  define PNG_NO_WRITE_UNKNOWN_CHUNKS
 572 #  define PNG_NO_HANDLE_AS_UNKNOWN
 573 #  define PNG_NO_READ_USER_CHUNKS
 574 #  define PNG_NO_READ_iCCP
 575 #  define PNG_NO_WRITE_iCCP
 576 #  define PNG_NO_READ_iTXt
 577 #  define PNG_NO_WRITE_iTXt
 578 #  define PNG_NO_READ_sCAL
 579 #  define PNG_NO_WRITE_sCAL
 580 #  define PNG_NO_READ_sPLT
 581 #  define PNG_NO_WRITE_sPLT
 582 #  define PNG_NO_INFO_IMAGE
 583 #  define PNG_NO_READ_RGB_TO_GRAY
 584 #  define PNG_NO_READ_USER_TRANSFORM
 585 #  define PNG_NO_WRITE_USER_TRANSFORM
 586 #  define PNG_NO_USER_MEM
 587 #  define PNG_NO_READ_EMPTY_PLTE
 588 #  define PNG_NO_MNG_FEATURES
 589 #  define PNG_NO_FIXED_POINT_SUPPORTED
 590 #endif
 591
 592 /* Ignore attempt to turn off both floating and fixed point support */
 593 #if !defined(PNG_FLOATING_POINT_SUPPORTED) || \
 594     !defined(PNG_NO_FIXED_POINT_SUPPORTED)
 595 #  define PNG_FIXED_POINT_SUPPORTED
 596 #endif
 597
 598 #ifndef PNG_NO_FREE_ME
 599 #  define PNG_FREE_ME_SUPPORTED
 600 #endif
 601
 602 #ifdef PNG_READ_SUPPORTED
 603
 604 #if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \
 605       !defined(PNG_NO_READ_TRANSFORMS)
 606 #  define PNG_READ_TRANSFORMS_SUPPORTED
 607 #endif
 608
 609 #ifdef PNG_READ_TRANSFORMS_SUPPORTED
 610 #  ifndef PNG_NO_READ_EXPAND
 611 #    define PNG_READ_EXPAND_SUPPORTED
 612 #  endif
 613 #  ifndef PNG_NO_READ_SHIFT
 614 #    define PNG_READ_SHIFT_SUPPORTED
 615 #  endif
 616 #  ifndef PNG_NO_READ_PACK
 617 #    define PNG_READ_PACK_SUPPORTED
 618 #  endif
 619 #  ifndef PNG_NO_READ_BGR
 620 #    define PNG_READ_BGR_SUPPORTED
 621 #  endif
 622 #  ifndef PNG_NO_READ_SWAP
 623 #    define PNG_READ_SWAP_SUPPORTED
 624 #  endif
 625 #  ifndef PNG_NO_READ_PACKSWAP
 626 #    define PNG_READ_PACKSWAP_SUPPORTED
 627 #  endif
 628 #  ifndef PNG_NO_READ_INVERT
 629 #    define PNG_READ_INVERT_SUPPORTED
 630 #  endif
 631 #  ifndef PNG_NO_READ_DITHER
 632 #    define PNG_READ_DITHER_SUPPORTED
 633 #  endif
 634 #  ifndef PNG_NO_READ_BACKGROUND
 635 #    define PNG_READ_BACKGROUND_SUPPORTED
 636 #  endif
 637 #  ifndef PNG_NO_READ_16_TO_8
 638 #    define PNG_READ_16_TO_8_SUPPORTED
 639 #  endif
 640 #  ifndef PNG_NO_READ_FILLER
 641 #    define PNG_READ_FILLER_SUPPORTED
 642 #  endif
 643 #  ifndef PNG_NO_READ_GAMMA
 644 #    define PNG_READ_GAMMA_SUPPORTED
 645 #  endif
 646 #  ifndef PNG_NO_READ_GRAY_TO_RGB
 647 #    define PNG_READ_GRAY_TO_RGB_SUPPORTED
 648 #  endif
 649 #  ifndef PNG_NO_READ_SWAP_ALPHA
 650 #    define PNG_READ_SWAP_ALPHA_SUPPORTED
 651 #  endif
 652 #  ifndef PNG_NO_READ_INVERT_ALPHA
 653 #    define PNG_READ_INVERT_ALPHA_SUPPORTED
 654 #  endif
 655 #  ifndef PNG_NO_READ_STRIP_ALPHA
 656 #    define PNG_READ_STRIP_ALPHA_SUPPORTED
 657 #  endif
 658 #  ifndef PNG_NO_READ_USER_TRANSFORM
 659 #    define PNG_READ_USER_TRANSFORM_SUPPORTED
 660 #  endif
 661 #  ifndef PNG_NO_READ_RGB_TO_GRAY
 662 #    define PNG_READ_RGB_TO_GRAY_SUPPORTED
 663 #  endif
 664 #endif /* PNG_READ_TRANSFORMS_SUPPORTED */
 665
 666 /* PNG_PROGRESSIVE_READ_NOT_SUPPORTED is deprecated. */
 667 #if !defined(PNG_NO_PROGRESSIVE_READ) && \
 668  !defined(PNG_PROGRESSIVE_READ_NOT_SUPPORTED)  /* if you don't do progressive */
 669 #  define PNG_PROGRESSIVE_READ_SUPPORTED     /* reading.  This is not talking */
 670 #endif                               /* about interlacing capability!  You'll */
 671             /* still have interlacing unless you change the following define: */
 672 #define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */
 673
 674 /* PNG_NO_SEQUENTIAL_READ_SUPPORTED is deprecated. */
 675 #if !defined(PNG_NO_SEQUENTIAL_READ) && \
 676     !defined(PNG_SEQUENTIAL_READ_SUPPORTED) && \
 677     !defined(PNG_NO_SEQUENTIAL_READ_SUPPORTED)
 678 #  define PNG_SEQUENTIAL_READ_SUPPORTED
 679 #endif
 680
 681 #define PNG_READ_INTERLACING_SUPPORTED /* required in PNG-compliant decoders */
 682
 683 #ifndef PNG_NO_READ_COMPOSITE_NODIV
 684 #  ifndef PNG_NO_READ_COMPOSITED_NODIV  /* libpng-1.0.x misspelling */
 685 #    define PNG_READ_COMPOSITE_NODIV_SUPPORTED  /* well tested on Intel, SGI */
 686 #  endif
 687 #endif
 688
 689 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
 690 /* Deprecated, will be removed from version 2.0.0.
 691    Use PNG_MNG_FEATURES_SUPPORTED instead. */
 692 #ifndef PNG_NO_READ_EMPTY_PLTE
 693 #  define PNG_READ_EMPTY_PLTE_SUPPORTED
 694 #endif
 695 #endif
 696
 697 #endif /* PNG_READ_SUPPORTED */
 698
 699 #ifdef PNG_WRITE_SUPPORTED
 700
 701 # if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \
 702     !defined(PNG_NO_WRITE_TRANSFORMS)
 703 #  define PNG_WRITE_TRANSFORMS_SUPPORTED
 704 #endif
 705
 706 #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
 707 #  ifndef PNG_NO_WRITE_SHIFT
 708 #    define PNG_WRITE_SHIFT_SUPPORTED
 709 #  endif
 710 #  ifndef PNG_NO_WRITE_PACK
 711 #    define PNG_WRITE_PACK_SUPPORTED
 712 #  endif
 713 #  ifndef PNG_NO_WRITE_BGR
 714 #    define PNG_WRITE_BGR_SUPPORTED
 715 #  endif
 716 #  ifndef PNG_NO_WRITE_SWAP
 717 #    define PNG_WRITE_SWAP_SUPPORTED
 718 #  endif
 719 #  ifndef PNG_NO_WRITE_PACKSWAP
 720 #    define PNG_WRITE_PACKSWAP_SUPPORTED
 721 #  endif
 722 #  ifndef PNG_NO_WRITE_INVERT
 723 #    define PNG_WRITE_INVERT_SUPPORTED
 724 #  endif
 725 #  ifndef PNG_NO_WRITE_FILLER
 726 #    define PNG_WRITE_FILLER_SUPPORTED   /* same as WRITE_STRIP_ALPHA */
 727 #  endif
 728 #  ifndef PNG_NO_WRITE_SWAP_ALPHA
 729 #    define PNG_WRITE_SWAP_ALPHA_SUPPORTED
 730 #  endif
 731 #ifndef PNG_1_0_X
 732 #  ifndef PNG_NO_WRITE_INVERT_ALPHA
 733 #    define PNG_WRITE_INVERT_ALPHA_SUPPORTED
 734 #  endif
 735 #endif
 736 #  ifndef PNG_NO_WRITE_USER_TRANSFORM
 737 #    define PNG_WRITE_USER_TRANSFORM_SUPPORTED
 738 #  endif
 739 #endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */
 740
 741 #if !defined(PNG_NO_WRITE_INTERLACING_SUPPORTED) && \
 742     !defined(PNG_WRITE_INTERLACING_SUPPORTED)
 743 #define PNG_WRITE_INTERLACING_SUPPORTED  /* not required for PNG-compliant
 744                                             encoders, but can cause trouble
 745                                             if left undefined */
 746 #endif
 747
 748 #if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \
 749     !defined(PNG_WRITE_WEIGHTED_FILTER) && \
 750      defined(PNG_FLOATING_POINT_SUPPORTED)
 751 #  define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
 752 #endif
 753
 754 #ifndef PNG_NO_WRITE_FLUSH
 755 #  define PNG_WRITE_FLUSH_SUPPORTED
 756 #endif
 757
 758 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
 759 /* Deprecated, see PNG_MNG_FEATURES_SUPPORTED, above */
 760 #ifndef PNG_NO_WRITE_EMPTY_PLTE
 761 #  define PNG_WRITE_EMPTY_PLTE_SUPPORTED
 762 #endif
 763 #endif
 764
 765 #endif /* PNG_WRITE_SUPPORTED */
 766
 767 #ifndef PNG_1_0_X
 768 #  ifndef PNG_NO_ERROR_NUMBERS
 769 #    define PNG_ERROR_NUMBERS_SUPPORTED
 770 #  endif
 771 #endif /* PNG_1_0_X */
 772
 773 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
 774     defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
 775 #  ifndef PNG_NO_USER_TRANSFORM_PTR
 776 #    define PNG_USER_TRANSFORM_PTR_SUPPORTED
 777 #  endif
 778 #endif
 779
 780 #ifndef PNG_NO_STDIO
 781 #  define PNG_TIME_RFC1123_SUPPORTED
 782 #endif
 783
 784 /* This adds extra functions in pngget.c for accessing data from the
 785  * info pointer (added in version 0.99)
 786  * png_get_image_width()
 787  * png_get_image_height()
 788  * png_get_bit_depth()
 789  * png_get_color_type()
 790  * png_get_compression_type()
 791  * png_get_filter_type()
 792  * png_get_interlace_type()
 793  * png_get_pixel_aspect_ratio()
 794  * png_get_pixels_per_meter()
 795  * png_get_x_offset_pixels()
 796  * png_get_y_offset_pixels()
 797  * png_get_x_offset_microns()
 798  * png_get_y_offset_microns()
 799  */
 800 #if !defined(PNG_NO_EASY_ACCESS) && !defined(PNG_EASY_ACCESS_SUPPORTED)
 801 #  define PNG_EASY_ACCESS_SUPPORTED
 802 #endif
 803
 804 /* PNG_ASSEMBLER_CODE was enabled by default in version 1.2.0
 805  * and removed from version 1.2.20.  The following will be removed
 806  * from libpng-1.4.0
 807 */
 808
 809 #if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_OPTIMIZED_CODE)
 810 #  ifndef PNG_OPTIMIZED_CODE_SUPPORTED
 811 #    define PNG_OPTIMIZED_CODE_SUPPORTED
 812 #  endif
 813 #endif
 814
 815 #if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_ASSEMBLER_CODE)
 816 #  ifndef PNG_ASSEMBLER_CODE_SUPPORTED
 817 #    define PNG_ASSEMBLER_CODE_SUPPORTED
 818 #  endif
 819
 820 #  if defined(__GNUC__) && defined(__x86_64__) && (__GNUC__ < 4)
 821      /* work around 64-bit gcc compiler bugs in gcc-3.x */
 822 #    if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
 823 #      define PNG_NO_MMX_CODE
 824 #    endif
 825 #  endif
 826
 827 #  ifdef __APPLE__
 828 #    if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
 829 #      define PNG_NO_MMX_CODE
 830 #    endif
 831 #  endif
 832
 833 #  if (defined(__MWERKS__) && ((__MWERKS__ < 0x0900) || macintosh))
 834 #    if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
 835 #      define PNG_NO_MMX_CODE
 836 #    endif
 837 #  endif
 838
 839 #  if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
 840 #    define PNG_MMX_CODE_SUPPORTED
 841 #  endif
 842
 843 #endif
 844 /* end of obsolete code to be removed from libpng-1.4.0 */
 845
 846 /* Added at libpng-1.2.0 */
 847 #ifndef PNG_1_0_X
 848 #if !defined(PNG_NO_USER_MEM) && !defined(PNG_USER_MEM_SUPPORTED)
 849 #  define PNG_USER_MEM_SUPPORTED
 850 #endif
 851 #endif /* PNG_1_0_X */
 852
 853 /* Added at libpng-1.2.6 */
 854 #ifndef PNG_1_0_X
 855 #  ifndef PNG_SET_USER_LIMITS_SUPPORTED
 856 #    ifndef PNG_NO_SET_USER_LIMITS
 857 #      define PNG_SET_USER_LIMITS_SUPPORTED
 858 #    endif
 859 #  endif
 860 #endif /* PNG_1_0_X */
 861
 862 /* Added at libpng-1.0.53 and 1.2.43 */
 863 #ifndef PNG_USER_LIMITS_SUPPORTED
 864 #  ifndef PNG_NO_USER_LIMITS
 865 #    define PNG_USER_LIMITS_SUPPORTED
 866 #  endif
 867 #endif
 868
 869 /* Added at libpng-1.0.16 and 1.2.6.  To accept all valid PNGS no matter
 870  * how large, set these limits to 0x7fffffffL
 871  */
 872 #ifndef PNG_USER_WIDTH_MAX
 873 #  define PNG_USER_WIDTH_MAX 1000000L
 874 #endif
 875 #ifndef PNG_USER_HEIGHT_MAX
 876 #  define PNG_USER_HEIGHT_MAX 1000000L
 877 #endif
 878
 879 /* Added at libpng-1.2.43.  To accept all valid PNGs no matter
 880  * how large, set these two limits to 0.
 881  */
 882 #ifndef PNG_USER_CHUNK_CACHE_MAX
 883 #  define PNG_USER_CHUNK_CACHE_MAX 32765
 884 #endif
 885
 886 /* Added at libpng-1.2.43 */
 887 #ifndef PNG_USER_CHUNK_MALLOC_MAX
 888 #  define PNG_USER_CHUNK_MALLOC_MAX 0
 889 #endif
 890
 891 #ifndef PNG_LITERAL_SHARP
 892 #  define PNG_LITERAL_SHARP 0x23
 893 #endif
 894 #ifndef PNG_LITERAL_LEFT_SQUARE_BRACKET
 895 #  define PNG_LITERAL_LEFT_SQUARE_BRACKET 0x5b
 896 #endif
 897 #ifndef PNG_LITERAL_RIGHT_SQUARE_BRACKET
 898 #  define PNG_LITERAL_RIGHT_SQUARE_BRACKET 0x5d
 899 #endif
 900
 901 /* Added at libpng-1.2.34 */
 902 #ifndef PNG_STRING_NEWLINE
 903 #define PNG_STRING_NEWLINE "\n"
 904 #endif
 905
 906 /* These are currently experimental features, define them if you want */
 907
 908 /* very little testing */
 909 /*
 910 #ifdef PNG_READ_SUPPORTED
 911 #  ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
 912 #    define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
 913 #  endif
 914 #endif
 915 */
 916
 917 /* This is only for PowerPC big-endian and 680x0 systems */
 918 /* some testing */
 919 /*
 920 #ifndef PNG_READ_BIG_ENDIAN_SUPPORTED
 921 #  define PNG_READ_BIG_ENDIAN_SUPPORTED
 922 #endif
 923 */
 924
 925 /* Buggy compilers (e.g., gcc 2.7.2.2) need this */
 926 /*
 927 #define PNG_NO_POINTER_INDEXING
 928 */
 929
 930 #if !defined(PNG_NO_POINTER_INDEXING) && \
 931     !defined(PNG_POINTER_INDEXING_SUPPORTED)
 932 #  define PNG_POINTER_INDEXING_SUPPORTED
 933 #endif
 934
 935 /* These functions are turned off by default, as they will be phased out. */
 936 /*
 937 #define  PNG_USELESS_TESTS_SUPPORTED
 938 #define  PNG_CORRECT_PALETTE_SUPPORTED
 939 */
 940
 941 /* Any chunks you are not interested in, you can undef here.  The
 942  * ones that allocate memory may be expecially important (hIST,
 943  * tEXt, zTXt, tRNS, pCAL).  Others will just save time and make png_info
 944  * a bit smaller.
 945  */
 946
 947 #if defined(PNG_READ_SUPPORTED) && \
 948     !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
 949     !defined(PNG_NO_READ_ANCILLARY_CHUNKS)
 950 #  define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
 951 #endif
 952
 953 #if defined(PNG_WRITE_SUPPORTED) && \
 954     !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
 955     !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS)
 956 #  define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
 957 #endif
 958
 959 #ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
 960
 961 #ifdef PNG_NO_READ_TEXT
 962 #  define PNG_NO_READ_iTXt
 963 #  define PNG_NO_READ_tEXt
 964 #  define PNG_NO_READ_zTXt
 965 #endif
 966 #ifndef PNG_NO_READ_bKGD
 967 #  define PNG_READ_bKGD_SUPPORTED
 968 #  define PNG_bKGD_SUPPORTED
 969 #endif
 970 #ifndef PNG_NO_READ_cHRM
 971 #  define PNG_READ_cHRM_SUPPORTED
 972 #  define PNG_cHRM_SUPPORTED
 973 #endif
 974 #ifndef PNG_NO_READ_gAMA
 975 #  define PNG_READ_gAMA_SUPPORTED
 976 #  define PNG_gAMA_SUPPORTED
 977 #endif
 978 #ifndef PNG_NO_READ_hIST
 979 #  define PNG_READ_hIST_SUPPORTED
 980 #  define PNG_hIST_SUPPORTED
 981 #endif
 982 #ifndef PNG_NO_READ_iCCP
 983 #  define PNG_READ_iCCP_SUPPORTED
 984 #  define PNG_iCCP_SUPPORTED
 985 #endif
 986 #ifndef PNG_NO_READ_iTXt
 987 #  ifndef PNG_READ_iTXt_SUPPORTED
 988 #    define PNG_READ_iTXt_SUPPORTED
 989 #  endif
 990 #  ifndef PNG_iTXt_SUPPORTED
 991 #    define PNG_iTXt_SUPPORTED
 992 #  endif
 993 #endif
 994 #ifndef PNG_NO_READ_oFFs
 995 #  define PNG_READ_oFFs_SUPPORTED
 996 #  define PNG_oFFs_SUPPORTED
 997 #endif
 998 #ifndef PNG_NO_READ_pCAL
 999 #  define PNG_READ_pCAL_SUPPORTED
1000 #  define PNG_pCAL_SUPPORTED
1001 #endif
1002 #ifndef PNG_NO_READ_sCAL
1003 #  define PNG_READ_sCAL_SUPPORTED
1004 #  define PNG_sCAL_SUPPORTED
1005 #endif
1006 #ifndef PNG_NO_READ_pHYs
1007 #  define PNG_READ_pHYs_SUPPORTED
1008 #  define PNG_pHYs_SUPPORTED
1009 #endif
1010 #ifndef PNG_NO_READ_sBIT
1011 #  define PNG_READ_sBIT_SUPPORTED
1012 #  define PNG_sBIT_SUPPORTED
1013 #endif
1014 #ifndef PNG_NO_READ_sPLT
1015 #  define PNG_READ_sPLT_SUPPORTED
1016 #  define PNG_sPLT_SUPPORTED
1017 #endif
1018 #ifndef PNG_NO_READ_sRGB
1019 #  define PNG_READ_sRGB_SUPPORTED
1020 #  define PNG_sRGB_SUPPORTED
1021 #endif
1022 #ifndef PNG_NO_READ_tEXt
1023 #  define PNG_READ_tEXt_SUPPORTED
1024 #  define PNG_tEXt_SUPPORTED
1025 #endif
1026 #ifndef PNG_NO_READ_tIME
1027 #  define PNG_READ_tIME_SUPPORTED
1028 #  define PNG_tIME_SUPPORTED
1029 #endif
1030 #ifndef PNG_NO_READ_tRNS
1031 #  define PNG_READ_tRNS_SUPPORTED
1032 #  define PNG_tRNS_SUPPORTED
1033 #endif
1034 #ifndef PNG_NO_READ_zTXt
1035 #  define PNG_READ_zTXt_SUPPORTED
1036 #  define PNG_zTXt_SUPPORTED
1037 #endif
1038 #ifndef PNG_NO_READ_OPT_PLTE
1039 #  define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */
1040 #endif                      /* optional PLTE chunk in RGB and RGBA images */
1041 #if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \
1042     defined(PNG_READ_zTXt_SUPPORTED)
1043 #  define PNG_READ_TEXT_SUPPORTED
1044 #  define PNG_TEXT_SUPPORTED
1045 #endif
1046
1047 #endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */
1048
1049 #ifndef PNG_NO_READ_UNKNOWN_CHUNKS
1050 #  define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
1051 #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
1052 #    define PNG_UNKNOWN_CHUNKS_SUPPORTED
1053 #  endif
1054 #endif
1055 #if !defined(PNG_NO_READ_USER_CHUNKS) && \
1056      defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
1057 #  define PNG_READ_USER_CHUNKS_SUPPORTED
1058 #  define PNG_USER_CHUNKS_SUPPORTED
1059 #  ifdef PNG_NO_READ_UNKNOWN_CHUNKS
1060 #    undef PNG_NO_READ_UNKNOWN_CHUNKS
1061 #  endif
1062 #  ifdef PNG_NO_HANDLE_AS_UNKNOWN
1063 #    undef PNG_NO_HANDLE_AS_UNKNOWN
1064 #  endif
1065 #endif
1066
1067 #ifndef PNG_NO_HANDLE_AS_UNKNOWN
1068 #  ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1069 #    define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1070 #  endif
1071 #endif
1072
1073 #ifdef PNG_WRITE_SUPPORTED
1074 #ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
1075
1076 #ifdef PNG_NO_WRITE_TEXT
1077 #  define PNG_NO_WRITE_iTXt
1078 #  define PNG_NO_WRITE_tEXt
1079 #  define PNG_NO_WRITE_zTXt
1080 #endif
1081 #ifndef PNG_NO_WRITE_bKGD
1082 #  define PNG_WRITE_bKGD_SUPPORTED
1083 #  ifndef PNG_bKGD_SUPPORTED
1084 #    define PNG_bKGD_SUPPORTED
1085 #  endif
1086 #endif
1087 #ifndef PNG_NO_WRITE_cHRM
1088 #  define PNG_WRITE_cHRM_SUPPORTED
1089 #  ifndef PNG_cHRM_SUPPORTED
1090 #    define PNG_cHRM_SUPPORTED
1091 #  endif
1092 #endif
1093 #ifndef PNG_NO_WRITE_gAMA
1094 #  define PNG_WRITE_gAMA_SUPPORTED
1095 #  ifndef PNG_gAMA_SUPPORTED
1096 #    define PNG_gAMA_SUPPORTED
1097 #  endif
1098 #endif
1099 #ifndef PNG_NO_WRITE_hIST
1100 #  define PNG_WRITE_hIST_SUPPORTED
1101 #  ifndef PNG_hIST_SUPPORTED
1102 #    define PNG_hIST_SUPPORTED
1103 #  endif
1104 #endif
1105 #ifndef PNG_NO_WRITE_iCCP
1106 #  define PNG_WRITE_iCCP_SUPPORTED
1107 #  ifndef PNG_iCCP_SUPPORTED
1108 #    define PNG_iCCP_SUPPORTED
1109 #  endif
1110 #endif
1111 #ifndef PNG_NO_WRITE_iTXt
1112 #  ifndef PNG_WRITE_iTXt_SUPPORTED
1113 #    define PNG_WRITE_iTXt_SUPPORTED
1114 #  endif
1115 #  ifndef PNG_iTXt_SUPPORTED
1116 #    define PNG_iTXt_SUPPORTED
1117 #  endif
1118 #endif
1119 #ifndef PNG_NO_WRITE_oFFs
1120 #  define PNG_WRITE_oFFs_SUPPORTED
1121 #  ifndef PNG_oFFs_SUPPORTED
1122 #    define PNG_oFFs_SUPPORTED
1123 #  endif
1124 #endif
1125 #ifndef PNG_NO_WRITE_pCAL
1126 #  define PNG_WRITE_pCAL_SUPPORTED
1127 #  ifndef PNG_pCAL_SUPPORTED
1128 #    define PNG_pCAL_SUPPORTED
1129 #  endif
1130 #endif
1131 #ifndef PNG_NO_WRITE_sCAL
1132 #  define PNG_WRITE_sCAL_SUPPORTED
1133 #  ifndef PNG_sCAL_SUPPORTED
1134 #    define PNG_sCAL_SUPPORTED
1135 #  endif
1136 #endif
1137 #ifndef PNG_NO_WRITE_pHYs
1138 #  define PNG_WRITE_pHYs_SUPPORTED
1139 #  ifndef PNG_pHYs_SUPPORTED
1140 #    define PNG_pHYs_SUPPORTED
1141 #  endif
1142 #endif
1143 #ifndef PNG_NO_WRITE_sBIT
1144 #  define PNG_WRITE_sBIT_SUPPORTED
1145 #  ifndef PNG_sBIT_SUPPORTED
1146 #    define PNG_sBIT_SUPPORTED
1147 #  endif
1148 #endif
1149 #ifndef PNG_NO_WRITE_sPLT
1150 #  define PNG_WRITE_sPLT_SUPPORTED
1151 #  ifndef PNG_sPLT_SUPPORTED
1152 #    define PNG_sPLT_SUPPORTED
1153 #  endif
1154 #endif
1155 #ifndef PNG_NO_WRITE_sRGB
1156 #  define PNG_WRITE_sRGB_SUPPORTED
1157 #  ifndef PNG_sRGB_SUPPORTED
1158 #    define PNG_sRGB_SUPPORTED
1159 #  endif
1160 #endif
1161 #ifndef PNG_NO_WRITE_tEXt
1162 #  define PNG_WRITE_tEXt_SUPPORTED
1163 #  ifndef PNG_tEXt_SUPPORTED
1164 #    define PNG_tEXt_SUPPORTED
1165 #  endif
1166 #endif
1167 #ifndef PNG_NO_WRITE_tIME
1168 #  define PNG_WRITE_tIME_SUPPORTED
1169 #  ifndef PNG_tIME_SUPPORTED
1170 #    define PNG_tIME_SUPPORTED
1171 #  endif
1172 #endif
1173 #ifndef PNG_NO_WRITE_tRNS
1174 #  define PNG_WRITE_tRNS_SUPPORTED
1175 #  ifndef PNG_tRNS_SUPPORTED
1176 #    define PNG_tRNS_SUPPORTED
1177 #  endif
1178 #endif
1179 #ifndef PNG_NO_WRITE_zTXt
1180 #  define PNG_WRITE_zTXt_SUPPORTED
1181 #  ifndef PNG_zTXt_SUPPORTED
1182 #    define PNG_zTXt_SUPPORTED
1183 #  endif
1184 #endif
1185 #if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
1186     defined(PNG_WRITE_zTXt_SUPPORTED)
1187 #  define PNG_WRITE_TEXT_SUPPORTED
1188 #  ifndef PNG_TEXT_SUPPORTED
1189 #    define PNG_TEXT_SUPPORTED
1190 #  endif
1191 #endif
1192
1193 #ifdef PNG_WRITE_tIME_SUPPORTED
1194 #  ifndef PNG_NO_CONVERT_tIME
1195 #    ifndef _WIN32_WCE
1196 /*   The "tm" structure is not supported on WindowsCE */
1197 #      ifndef PNG_CONVERT_tIME_SUPPORTED
1198 #        define PNG_CONVERT_tIME_SUPPORTED
1199 #      endif
1200 #   endif
1201 #  endif
1202 #endif
1203
1204 #endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */
1205
1206 #if !defined(PNG_NO_WRITE_FILTER) && !defined(PNG_WRITE_FILTER_SUPPORTED)
1207 #  define PNG_WRITE_FILTER_SUPPORTED
1208 #endif
1209
1210 #ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS
1211 #  define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1212 #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
1213 #    define PNG_UNKNOWN_CHUNKS_SUPPORTED
1214 #  endif
1215 #endif
1216
1217 #ifndef PNG_NO_HANDLE_AS_UNKNOWN
1218 #  ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1219 #    define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1220 #  endif
1221 #endif
1222 #endif /* PNG_WRITE_SUPPORTED */
1223
1224 /* Turn this off to disable png_read_png() and
1225  * png_write_png() and leave the row_pointers member
1226  * out of the info structure.
1227  */
1228 #ifndef PNG_NO_INFO_IMAGE
1229 #  define PNG_INFO_IMAGE_SUPPORTED
1230 #endif
1231
1232 /* Need the time information for converting tIME chunks */
1233 #ifdef PNG_CONVERT_tIME_SUPPORTED
1234      /* "time.h" functions are not supported on WindowsCE */
1235 #    include <time.h>
1236 #endif
1237
1238 /* Some typedefs to get us started.  These should be safe on most of the
1239  * common platforms.  The typedefs should be at least as large as the
1240  * numbers suggest (a png_uint_32 must be at least 32 bits long), but they
1241  * don't have to be exactly that size.  Some compilers dislike passing
1242  * unsigned shorts as function parameters, so you may be better off using
1243  * unsigned int for png_uint_16.  Likewise, for 64-bit systems, you may
1244  * want to have unsigned int for png_uint_32 instead of unsigned long.
1245  */
1246
1247 typedef unsigned long png_uint_32;
1248 typedef long png_int_32;
1249 typedef unsigned short png_uint_16;
1250 typedef short png_int_16;
1251 typedef unsigned char png_byte;
1252
1253 /* This is usually size_t.  It is typedef'ed just in case you need it to
1254    change (I'm not sure if you will or not, so I thought I'd be safe) */
1255 #ifdef PNG_SIZE_T
1256    typedef PNG_SIZE_T png_size_t;
1257 #  define png_sizeof(x) png_convert_size(sizeof(x))
1258 #else
1259    typedef size_t png_size_t;
1260 #  define png_sizeof(x) sizeof(x)
1261 #endif
1262
1263 /* The following is needed for medium model support.  It cannot be in the
1264  * PNG_INTERNAL section.  Needs modification for other compilers besides
1265  * MSC.  Model independent support declares all arrays and pointers to be
1266  * large using the far keyword.  The zlib version used must also support
1267  * model independent data.  As of version zlib 1.0.4, the necessary changes
1268  * have been made in zlib.  The USE_FAR_KEYWORD define triggers other
1269  * changes that are needed. (Tim Wegner)
1270  */
1271
1272 /* Separate compiler dependencies (problem here is that zlib.h always
1273    defines FAR. (SJT) */
1274 #ifdef __BORLANDC__
1275 #  if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)
1276 #    define LDATA 1
1277 #  else
1278 #    define LDATA 0
1279 #  endif
1280    /* GRR:  why is Cygwin in here?  Cygwin is not Borland C... */
1281 #  if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)
1282 #    define PNG_MAX_MALLOC_64K
1283 #    if (LDATA != 1)
1284 #      ifndef FAR
1285 #        define FAR __far
1286 #      endif
1287 #      define USE_FAR_KEYWORD
1288 #    endif   /* LDATA != 1 */
1289      /* Possibly useful for moving data out of default segment.
1290       * Uncomment it if you want. Could also define FARDATA as
1291       * const if your compiler supports it. (SJT)
1292 #    define FARDATA FAR
1293       */
1294 #  endif  /* __WIN32__, __FLAT__, __CYGWIN__ */
1295 #endif   /* __BORLANDC__ */
1296
1297
1298 /* Suggest testing for specific compiler first before testing for
1299  * FAR.  The Watcom compiler defines both __MEDIUM__ and M_I86MM,
1300  * making reliance oncertain keywords suspect. (SJT)
1301  */
1302
1303 /* MSC Medium model */
1304 #ifdef FAR
1305 #  ifdef M_I86MM
1306 #    define USE_FAR_KEYWORD
1307 #    define FARDATA FAR
1308 #    include <dos.h>
1309 #  endif
1310 #endif
1311
1312 /* SJT: default case */
1313 #ifndef FAR
1314 #  define FAR
1315 #endif
1316
1317 /* At this point FAR is always defined */
1318 #ifndef FARDATA
1319 #  define FARDATA
1320 #endif
1321
1322 /* Typedef for floating-point numbers that are converted
1323    to fixed-point with a multiple of 100,000, e.g., int_gamma */
1324 typedef png_int_32 png_fixed_point;
1325
1326 /* Add typedefs for pointers */
1327 typedef void            FAR * png_voidp;
1328 typedef png_byte        FAR * png_bytep;
1329 typedef png_uint_32     FAR * png_uint_32p;
1330 typedef png_int_32      FAR * png_int_32p;
1331 typedef png_uint_16     FAR * png_uint_16p;
1332 typedef png_int_16      FAR * png_int_16p;
1333 typedef PNG_CONST char  FAR * png_const_charp;
1334 typedef char            FAR * png_charp;
1335 typedef png_fixed_point FAR * png_fixed_point_p;
1336
1337 #ifndef PNG_NO_STDIO
1338 #ifdef _WIN32_WCE
1339 typedef HANDLE                png_FILE_p;
1340 #else
1341 typedef FILE                * png_FILE_p;
1342 #endif
1343 #endif
1344
1345 #ifdef PNG_FLOATING_POINT_SUPPORTED
1346 typedef double          FAR * png_doublep;
1347 #endif
1348
1349 /* Pointers to pointers; i.e. arrays */
1350 typedef png_byte        FAR * FAR * png_bytepp;
1351 typedef png_uint_32     FAR * FAR * png_uint_32pp;
1352 typedef png_int_32      FAR * FAR * png_int_32pp;
1353 typedef png_uint_16     FAR * FAR * png_uint_16pp;
1354 typedef png_int_16      FAR * FAR * png_int_16pp;
1355 typedef PNG_CONST char  FAR * FAR * png_const_charpp;
1356 typedef char            FAR * FAR * png_charpp;
1357 typedef png_fixed_point FAR * FAR * png_fixed_point_pp;
1358 #ifdef PNG_FLOATING_POINT_SUPPORTED
1359 typedef double          FAR * FAR * png_doublepp;
1360 #endif
1361
1362 /* Pointers to pointers to pointers; i.e., pointer to array */
1363 typedef char            FAR * FAR * FAR * png_charppp;
1364
1365 #if defined(PNG_1_0_X) || defined(PNG_1_2_X)
1366 /* SPC -  Is this stuff deprecated? */
1367 /* It'll be removed as of libpng-1.4.0 - GR-P */
1368 /* libpng typedefs for types in zlib. If zlib changes
1369  * or another compression library is used, then change these.
1370  * Eliminates need to change all the source files.
1371  */
1372 typedef charf *         png_zcharp;
1373 typedef charf * FAR *   png_zcharpp;
1374 typedef z_stream FAR *  png_zstreamp;
1375 #endif /* (PNG_1_0_X) || defined(PNG_1_2_X) */
1376
1377 /*
1378  * Define PNG_BUILD_DLL if the module being built is a Windows
1379  * LIBPNG DLL.
1380  *
1381  * Define PNG_USE_DLL if you want to *link* to the Windows LIBPNG DLL.
1382  * It is equivalent to Microsoft predefined macro _DLL that is
1383  * automatically defined when you compile using the share
1384  * version of the CRT (C Run-Time library)
1385  *
1386  * The cygwin mods make this behavior a little different:
1387  * Define PNG_BUILD_DLL if you are building a dll for use with cygwin
1388  * Define PNG_STATIC if you are building a static library for use with cygwin,
1389  *   -or- if you are building an application that you want to link to the
1390  *   static library.
1391  * PNG_USE_DLL is defined by default (no user action needed) unless one of
1392  *   the other flags is defined.
1393  */
1394
1395 #if !defined(PNG_DLL) && (defined(PNG_BUILD_DLL) || defined(PNG_USE_DLL))
1396 #  define PNG_DLL
1397 #endif
1398 /* If CYGWIN, then disallow GLOBAL ARRAYS unless building a static lib.
1399  * When building a static lib, default to no GLOBAL ARRAYS, but allow
1400  * command-line override
1401  */
1402 #ifdef __CYGWIN__
1403 #  ifndef PNG_STATIC
1404 #    ifdef PNG_USE_GLOBAL_ARRAYS
1405 #      undef PNG_USE_GLOBAL_ARRAYS
1406 #    endif
1407 #    ifndef PNG_USE_LOCAL_ARRAYS
1408 #      define PNG_USE_LOCAL_ARRAYS
1409 #    endif
1410 #  else
1411 #    if defined(PNG_USE_LOCAL_ARRAYS) || defined(PNG_NO_GLOBAL_ARRAYS)
1412 #      ifdef PNG_USE_GLOBAL_ARRAYS
1413 #        undef PNG_USE_GLOBAL_ARRAYS
1414 #      endif
1415 #    endif
1416 #  endif
1417 #  if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1418 #    define PNG_USE_LOCAL_ARRAYS
1419 #  endif
1420 #endif
1421
1422 /* Do not use global arrays (helps with building DLL's)
1423  * They are no longer used in libpng itself, since version 1.0.5c,
1424  * but might be required for some pre-1.0.5c applications.
1425  */
1426 #if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1427 #  if defined(PNG_NO_GLOBAL_ARRAYS) || \
1428       (defined(__GNUC__) && defined(PNG_DLL)) || defined(_MSC_VER)
1429 #    define PNG_USE_LOCAL_ARRAYS
1430 #  else
1431 #    define PNG_USE_GLOBAL_ARRAYS
1432 #  endif
1433 #endif
1434
1435 #ifdef __CYGWIN__
1436 #  undef PNGAPI
1437 #  define PNGAPI __cdecl
1438 #  undef PNG_IMPEXP
1439 #  define PNG_IMPEXP
1440 #endif
1441
1442 /* If you define PNGAPI, e.g., with compiler option "-DPNGAPI=__stdcall",
1443  * you may get warnings regarding the linkage of png_zalloc and png_zfree.
1444  * Don't ignore those warnings; you must also reset the default calling
1445  * convention in your compiler to match your PNGAPI, and you must build
1446  * zlib and your applications the same way you build libpng.
1447  */
1448
1449 #if defined(__MINGW32__) && !defined(PNG_MODULEDEF)
1450 #  ifndef PNG_NO_MODULEDEF
1451 #    define PNG_NO_MODULEDEF
1452 #  endif
1453 #endif
1454
1455 #if !defined(PNG_IMPEXP) && defined(PNG_BUILD_DLL) && !defined(PNG_NO_MODULEDEF)
1456 #  define PNG_IMPEXP
1457 #endif
1458
1459 #if defined(PNG_DLL) || defined(_DLL) || defined(__DLL__ ) || \
1460     (( defined(_Windows) || defined(_WINDOWS) || \
1461        defined(WIN32) || defined(_WIN32) || defined(__WIN32__) ))
1462
1463 #  ifndef PNGAPI
1464 #     if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
1465 #        define PNGAPI __cdecl
1466 #     else
1467 #        define PNGAPI _cdecl
1468 #     endif
1469 #  endif
1470
1471 #  if !defined(PNG_IMPEXP) && (!defined(PNG_DLL) || \
1472        0 /* WINCOMPILER_WITH_NO_SUPPORT_FOR_DECLIMPEXP */)
1473 #     define PNG_IMPEXP
1474 #  endif
1475
1476 #  ifndef PNG_IMPEXP
1477
1478 #     define PNG_EXPORT_TYPE1(type,symbol)  PNG_IMPEXP type PNGAPI symbol
1479 #     define PNG_EXPORT_TYPE2(type,symbol)  type PNG_IMPEXP PNGAPI symbol
1480
1481       /* Borland/Microsoft */
1482 #     if defined(_MSC_VER) || defined(__BORLANDC__)
1483 #        if (_MSC_VER >= 800) || (__BORLANDC__ >= 0x500)
1484 #           define PNG_EXPORT PNG_EXPORT_TYPE1
1485 #        else
1486 #           define PNG_EXPORT PNG_EXPORT_TYPE2
1487 #           ifdef PNG_BUILD_DLL
1488 #              define PNG_IMPEXP __export
1489 #           else
1490 #              define PNG_IMPEXP /*__import */ /* doesn't exist AFAIK in
1491                                                  VC++ */
1492 #           endif                             /* Exists in Borland C++ for
1493                                                  C++ classes (== huge) */
1494 #        endif
1495 #     endif
1496
1497 #     ifndef PNG_IMPEXP
1498 #        ifdef PNG_BUILD_DLL
1499 #           define PNG_IMPEXP __declspec(dllexport)
1500 #        else
1501 #           define PNG_IMPEXP __declspec(dllimport)
1502 #        endif
1503 #     endif
1504 #  endif  /* PNG_IMPEXP */
1505 #else /* !(DLL || non-cygwin WINDOWS) */
1506 #   if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
1507 #      ifndef PNGAPI
1508 #         define PNGAPI _System
1509 #      endif
1510 #   else
1511 #      if 0 /* ... other platforms, with other meanings */
1512 #      endif
1513 #   endif
1514 #endif
1515
1516 #ifndef PNGAPI
1517 #  define PNGAPI
1518 #endif
1519 #ifndef PNG_IMPEXP
1520 #  define PNG_IMPEXP
1521 #endif
1522
1523 #ifdef PNG_BUILDSYMS
1524 #  ifndef PNG_EXPORT
1525 #    define PNG_EXPORT(type,symbol) PNG_FUNCTION_EXPORT symbol END
1526 #  endif
1527 #  ifdef PNG_USE_GLOBAL_ARRAYS
1528 #    ifndef PNG_EXPORT_VAR
1529 #      define PNG_EXPORT_VAR(type) PNG_DATA_EXPORT
1530 #    endif
1531 #  endif
1532 #endif
1533
1534 #ifndef PNG_EXPORT
1535 #  define PNG_EXPORT(type,symbol) PNG_IMPEXP type PNGAPI symbol
1536 #endif
1537
1538 #ifdef PNG_USE_GLOBAL_ARRAYS
1539 #  ifndef PNG_EXPORT_VAR
1540 #    define PNG_EXPORT_VAR(type) extern PNG_IMPEXP type
1541 #  endif
1542 #endif
1543
1544 #ifdef PNG_PEDANTIC_WARNINGS
1545 #  ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED
1546 #    define PNG_PEDANTIC_WARNINGS_SUPPORTED
1547 #  endif
1548 #endif
1549
1550 #ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED
1551 /* Support for compiler specific function attributes.  These are used
1552  * so that where compiler support is available incorrect use of API
1553  * functions in png.h will generate compiler warnings.  Added at libpng
1554  * version 1.2.41.
1555  */
1556 #  ifdef __GNUC__
1557 #    ifndef PNG_USE_RESULT
1558 #      define PNG_USE_RESULT __attribute__((__warn_unused_result__))
1559 #    endif
1560 #    ifndef PNG_NORETURN
1561 #      define PNG_NORETURN   __attribute__((__noreturn__))
1562 #    endif
1563 #    ifndef PNG_ALLOCATED
1564 #      define PNG_ALLOCATED  __attribute__((__malloc__))
1565 #    endif
1566
1567     /* This specifically protects structure members that should only be
1568      * accessed from within the library, therefore should be empty during
1569      * a library build.
1570      */
1571 #    ifndef PNG_DEPRECATED
1572 #      define PNG_DEPRECATED __attribute__((__deprecated__))
1573 #    endif
1574 #    ifndef PNG_DEPSTRUCT
1575 #      define PNG_DEPSTRUCT  __attribute__((__deprecated__))
1576 #    endif
1577 #    ifndef PNG_PRIVATE
1578 #      if 0 /* Doesn't work so we use deprecated instead*/
1579 #        define PNG_PRIVATE \
1580           __attribute__((warning("This function is not exported by libpng.")))
1581 #      else
1582 #        define PNG_PRIVATE \
1583           __attribute__((__deprecated__))
1584 #      endif
1585 #    endif /* PNG_PRIVATE */
1586 #  endif /* __GNUC__ */
1587 #endif /* PNG_PEDANTIC_WARNINGS */
1588
1589 #ifndef PNG_DEPRECATED
1590 #  define PNG_DEPRECATED  /* Use of this function is deprecated */
1591 #endif
1592 #ifndef PNG_USE_RESULT
1593 #  define PNG_USE_RESULT  /* The result of this function must be checked */
1594 #endif
1595 #ifndef PNG_NORETURN
1596 #  define PNG_NORETURN    /* This function does not return */
1597 #endif
1598 #ifndef PNG_ALLOCATED
1599 #  define PNG_ALLOCATED   /* The result of the function is new memory */
1600 #endif
1601 #ifndef PNG_DEPSTRUCT
1602 #  define PNG_DEPSTRUCT   /* Access to this struct member is deprecated */
1603 #endif
1604 #ifndef PNG_PRIVATE
1605 #  define PNG_PRIVATE     /* This is a private libpng function */
1606 #endif
1607
1608 /* User may want to use these so they are not in PNG_INTERNAL. Any library
1609  * functions that are passed far data must be model independent.
1610  */
1611
1612 #ifndef PNG_ABORT
1613 #  define PNG_ABORT() abort()
1614 #endif
1615
1616 #ifdef PNG_SETJMP_SUPPORTED
1617 #  define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf)
1618 #else
1619 #  define png_jmpbuf(png_ptr) \
1620    (LIBPNG_WAS_COMPILED_WITH__PNG_SETJMP_NOT_SUPPORTED)
1621 #endif
1622
1623 #ifdef USE_FAR_KEYWORD  /* memory model independent fns */
1624 /* Use this to make far-to-near assignments */
1625 #  define CHECK   1
1626 #  define NOCHECK 0
1627 #  define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK))
1628 #  define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK))
1629 #  define png_snprintf _fsnprintf   /* Added to v 1.2.19 */
1630 #  define png_strlen  _fstrlen
1631 #  define png_memcmp  _fmemcmp    /* SJT: added */
1632 #  define png_memcpy  _fmemcpy
1633 #  define png_memset  _fmemset
1634 #else /* Use the usual functions */
1635 #  define CVT_PTR(ptr)         (ptr)
1636 #  define CVT_PTR_NOCHECK(ptr) (ptr)
1637 #  ifndef PNG_NO_SNPRINTF
1638 #    ifdef _MSC_VER
1639 #      define png_snprintf _snprintf   /* Added to v 1.2.19 */
1640 #      define png_snprintf2 _snprintf
1641 #      define png_snprintf6 _snprintf
1642 #    else
1643 #      define png_snprintf snprintf   /* Added to v 1.2.19 */
1644 #      define png_snprintf2 snprintf
1645 #      define png_snprintf6 snprintf
1646 #    endif
1647 #  else
1648      /* You don't have or don't want to use snprintf().  Caution: Using
1649       * sprintf instead of snprintf exposes your application to accidental
1650       * or malevolent buffer overflows.  If you don't have snprintf()
1651       * as a general rule you should provide one (you can get one from
1652       * Portable OpenSSH).
1653       */
1654 #    define png_snprintf(s1,n,fmt,x1) sprintf(s1,fmt,x1)
1655 #    define png_snprintf2(s1,n,fmt,x1,x2) sprintf(s1,fmt,x1,x2)
1656 #    define png_snprintf6(s1,n,fmt,x1,x2,x3,x4,x5,x6) \
1657         sprintf(s1,fmt,x1,x2,x3,x4,x5,x6)
1658 #  endif
1659 #  define png_strlen  strlen
1660 #  define png_memcmp  memcmp      /* SJT: added */
1661 #  define png_memcpy  memcpy
1662 #  define png_memset  memset
1663 #endif
1664 /* End of memory model independent support */
1665
1666 /* Just a little check that someone hasn't tried to define something
1667  * contradictory.
1668  */
1669 #if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K)
1670 #  undef PNG_ZBUF_SIZE
1671 #  define PNG_ZBUF_SIZE 65536L
1672 #endif
1673
1674 /* Added at libpng-1.2.8 */
1675 #endif /* PNG_VERSION_INFO_ONLY */
1676
1677 #endif /* PNGCONF_H */