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      1 
      2 /* pngconf.h - machine configurable file for libpng
      3  *
      4  * libpng version 1.2.45 - July 7, 2011
      5  * Copyright (c) 1998-2011 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 /* This is the size of the compression buffer, and thus the size of
     90  * an IDAT chunk.  Make this whatever size you feel is best for your
     91  * machine.  One of these will be allocated per png_struct.  When this
     92  * is full, it writes the data to the disk, and does some other
     93  * calculations.  Making this an extremely small size will slow
     94  * the library down, but you may want to experiment to determine
     95  * where it becomes significant, if you are concerned with memory
     96  * usage.  Note that zlib allocates at least 32Kb also.  For readers,
     97  * this describes the size of the buffer available to read the data in.
     98  * Unless this gets smaller than the size of a row (compressed),
     99  * it should not make much difference how big this is.
    100  */
    101 
    102 #ifndef PNG_ZBUF_SIZE
    103 #  define PNG_ZBUF_SIZE 8192
    104 #endif
    105 
    106 /* Enable if you want a write-only libpng */
    107 
    108 #ifndef PNG_NO_READ_SUPPORTED
    109 #  define PNG_READ_SUPPORTED
    110 #endif
    111 
    112 /* Enable if you want a read-only libpng */
    113 
    114 #ifndef PNG_NO_WRITE_SUPPORTED
    115 #  define PNG_WRITE_SUPPORTED
    116 #endif
    117 
    118 /* Enabled in 1.2.41. */
    119 #ifdef PNG_ALLOW_BENIGN_ERRORS
    120 #  define png_benign_error png_warning
    121 #  define png_chunk_benign_error png_chunk_warning
    122 #else
    123 #  ifndef PNG_BENIGN_ERRORS_SUPPORTED
    124 #    define png_benign_error png_error
    125 #    define png_chunk_benign_error png_chunk_error
    126 #  endif
    127 #endif
    128 
    129 /* Added in libpng-1.2.41 */
    130 #if !defined(PNG_NO_WARNINGS) && !defined(PNG_WARNINGS_SUPPORTED)
    131 #  define PNG_WARNINGS_SUPPORTED
    132 #endif
    133 
    134 #if !defined(PNG_NO_ERROR_TEXT) && !defined(PNG_ERROR_TEXT_SUPPORTED)
    135 #  define PNG_ERROR_TEXT_SUPPORTED
    136 #endif
    137 
    138 #if !defined(PNG_NO_CHECK_cHRM) && !defined(PNG_CHECK_cHRM_SUPPORTED)
    139 #  define PNG_CHECK_cHRM_SUPPORTED
    140 #endif
    141 
    142 /* Enabled by default in 1.2.0.  You can disable this if you don't need to
    143  * support PNGs that are embedded in MNG datastreams
    144  */
    145 #if !defined(PNG_1_0_X) && !defined(PNG_NO_MNG_FEATURES)
    146 #  ifndef PNG_MNG_FEATURES_SUPPORTED
    147 #    define PNG_MNG_FEATURES_SUPPORTED
    148 #  endif
    149 #endif
    150 
    151 #ifndef PNG_NO_FLOATING_POINT_SUPPORTED
    152 #  ifndef PNG_FLOATING_POINT_SUPPORTED
    153 #    define PNG_FLOATING_POINT_SUPPORTED
    154 #  endif
    155 #endif
    156 
    157 /* If you are running on a machine where you cannot allocate more
    158  * than 64K of memory at once, uncomment this.  While libpng will not
    159  * normally need that much memory in a chunk (unless you load up a very
    160  * large file), zlib needs to know how big of a chunk it can use, and
    161  * libpng thus makes sure to check any memory allocation to verify it
    162  * will fit into memory.
    163 #define PNG_MAX_MALLOC_64K
    164  */
    165 #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
    166 #  define PNG_MAX_MALLOC_64K
    167 #endif
    168 
    169 /* Special munging to support doing things the 'cygwin' way:
    170  * 'Normal' png-on-win32 defines/defaults:
    171  *   PNG_BUILD_DLL -- building dll
    172  *   PNG_USE_DLL   -- building an application, linking to dll
    173  *   (no define)   -- building static library, or building an
    174  *                    application and linking to the static lib
    175  * 'Cygwin' defines/defaults:
    176  *   PNG_BUILD_DLL -- (ignored) building the dll
    177  *   (no define)   -- (ignored) building an application, linking to the dll
    178  *   PNG_STATIC    -- (ignored) building the static lib, or building an
    179  *                    application that links to the static lib.
    180  *   ALL_STATIC    -- (ignored) building various static libs, or building an
    181  *                    application that links to the static libs.
    182  * Thus,
    183  * a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and
    184  * this bit of #ifdefs will define the 'correct' config variables based on
    185  * that. If a cygwin user *wants* to define 'PNG_USE_DLL' that's okay, but
    186  * unnecessary.
    187  *
    188  * Also, the precedence order is:
    189  *   ALL_STATIC (since we can't #undef something outside our namespace)
    190  *   PNG_BUILD_DLL
    191  *   PNG_STATIC
    192  *   (nothing) == PNG_USE_DLL
    193  *
    194  * CYGWIN (2002-01-20): The preceding is now obsolete. With the advent
    195  *   of auto-import in binutils, we no longer need to worry about
    196  *   __declspec(dllexport) / __declspec(dllimport) and friends.  Therefore,
    197  *   we don't need to worry about PNG_STATIC or ALL_STATIC when it comes
    198  *   to __declspec() stuff.  However, we DO need to worry about
    199  *   PNG_BUILD_DLL and PNG_STATIC because those change some defaults
    200  *   such as CONSOLE_IO and whether GLOBAL_ARRAYS are allowed.
    201  */
    202 #ifdef __CYGWIN__
    203 #  ifdef ALL_STATIC
    204 #    ifdef PNG_BUILD_DLL
    205 #      undef PNG_BUILD_DLL
    206 #    endif
    207 #    ifdef PNG_USE_DLL
    208 #      undef PNG_USE_DLL
    209 #    endif
    210 #    ifdef PNG_DLL
    211 #      undef PNG_DLL
    212 #    endif
    213 #    ifndef PNG_STATIC
    214 #      define PNG_STATIC
    215 #    endif
    216 #  else
    217 #    ifdef PNG_BUILD_DLL
    218 #      ifdef PNG_STATIC
    219 #        undef PNG_STATIC
    220 #      endif
    221 #      ifdef PNG_USE_DLL
    222 #        undef PNG_USE_DLL
    223 #      endif
    224 #      ifndef PNG_DLL
    225 #        define PNG_DLL
    226 #      endif
    227 #    else
    228 #      ifdef PNG_STATIC
    229 #        ifdef PNG_USE_DLL
    230 #          undef PNG_USE_DLL
    231 #        endif
    232 #        ifdef PNG_DLL
    233 #          undef PNG_DLL
    234 #        endif
    235 #      else
    236 #        ifndef PNG_USE_DLL
    237 #          define PNG_USE_DLL
    238 #        endif
    239 #        ifndef PNG_DLL
    240 #          define PNG_DLL
    241 #        endif
    242 #      endif
    243 #    endif
    244 #  endif
    245 #endif
    246 
    247 /* This protects us against compilers that run on a windowing system
    248  * and thus don't have or would rather us not use the stdio types:
    249  * stdin, stdout, and stderr.  The only one currently used is stderr
    250  * in png_error() and png_warning().  #defining PNG_NO_CONSOLE_IO will
    251  * prevent these from being compiled and used. #defining PNG_NO_STDIO
    252  * will also prevent these, plus will prevent the entire set of stdio
    253  * macros and functions (FILE *, printf, etc.) from being compiled and used,
    254  * unless (PNG_DEBUG > 0) has been #defined.
    255  *
    256  * #define PNG_NO_CONSOLE_IO
    257  * #define PNG_NO_STDIO
    258  */
    259 
    260 #if !defined(PNG_NO_STDIO) && !defined(PNG_STDIO_SUPPORTED)
    261 #  define PNG_STDIO_SUPPORTED
    262 #endif
    263 
    264 #ifdef _WIN32_WCE
    265 #  include <windows.h>
    266    /* Console I/O functions are not supported on WindowsCE */
    267 #  define PNG_NO_CONSOLE_IO
    268    /* abort() may not be supported on some/all Windows CE platforms */
    269 #  define PNG_ABORT() exit(-1)
    270 #  ifdef PNG_DEBUG
    271 #    undef PNG_DEBUG
    272 #  endif
    273 #endif
    274 
    275 #ifdef PNG_BUILD_DLL
    276 #  ifndef PNG_CONSOLE_IO_SUPPORTED
    277 #    ifndef PNG_NO_CONSOLE_IO
    278 #      define PNG_NO_CONSOLE_IO
    279 #    endif
    280 #  endif
    281 #endif
    282 
    283 #  ifdef PNG_NO_STDIO
    284 #    ifndef PNG_NO_CONSOLE_IO
    285 #      define PNG_NO_CONSOLE_IO
    286 #    endif
    287 #    ifdef PNG_DEBUG
    288 #      if (PNG_DEBUG > 0)
    289 #        include <stdio.h>
    290 #      endif
    291 #    endif
    292 #  else
    293 #    ifndef _WIN32_WCE
    294 /* "stdio.h" functions are not supported on WindowsCE */
    295 #      include <stdio.h>
    296 #    endif
    297 #  endif
    298 
    299 #if !(defined PNG_NO_CONSOLE_IO) && !defined(PNG_CONSOLE_IO_SUPPORTED)
    300 #  define PNG_CONSOLE_IO_SUPPORTED
    301 #endif
    302 
    303 /* This macro protects us against machines that don't have function
    304  * prototypes (ie K&R style headers).  If your compiler does not handle
    305  * function prototypes, define this macro and use the included ansi2knr.
    306  * I've always been able to use _NO_PROTO as the indicator, but you may
    307  * need to drag the empty declaration out in front of here, or change the
    308  * ifdef to suit your own needs.
    309  */
    310 #ifndef PNGARG
    311 
    312 #ifdef OF /* zlib prototype munger */
    313 #  define PNGARG(arglist) OF(arglist)
    314 #else
    315 
    316 #ifdef _NO_PROTO
    317 #  define PNGARG(arglist) ()
    318 #  ifndef PNG_TYPECAST_NULL
    319 #     define PNG_TYPECAST_NULL
    320 #  endif
    321 #else
    322 #  define PNGARG(arglist) arglist
    323 #endif /* _NO_PROTO */
    324 
    325 
    326 #endif /* OF */
    327 
    328 #endif /* PNGARG */
    329 
    330 /* Try to determine if we are compiling on a Mac.  Note that testing for
    331  * just __MWERKS__ is not good enough, because the Codewarrior is now used
    332  * on non-Mac platforms.
    333  */
    334 #ifndef MACOS
    335 #  if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
    336       defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC)
    337 #    define MACOS
    338 #  endif
    339 #endif
    340 
    341 /* enough people need this for various reasons to include it here */
    342 #if !defined(MACOS) && !defined(RISCOS) && !defined(_WIN32_WCE)
    343 #  include <sys/types.h>
    344 #endif
    345 
    346 #if !defined(PNG_SETJMP_NOT_SUPPORTED) && !defined(PNG_NO_SETJMP_SUPPORTED)
    347 #  define PNG_SETJMP_SUPPORTED
    348 #endif
    349 
    350 #ifdef PNG_SETJMP_SUPPORTED
    351 /* This is an attempt to force a single setjmp behaviour on Linux.  If
    352  * the X config stuff didn't define _BSD_SOURCE we wouldn't need this.
    353  *
    354  * You can bypass this test if you know that your application uses exactly
    355  * the same setjmp.h that was included when libpng was built.  Only define
    356  * PNG_SKIP_SETJMP_CHECK while building your application, prior to the
    357  * application's '#include "png.h"'. Don't define PNG_SKIP_SETJMP_CHECK
    358  * while building a separate libpng library for general use.
    359  */
    360 
    361 #  ifndef PNG_SKIP_SETJMP_CHECK
    362 #    ifdef __linux__
    363 #      ifdef _BSD_SOURCE
    364 #        define PNG_SAVE_BSD_SOURCE
    365 #        undef _BSD_SOURCE
    366 #      endif
    367 #      ifdef _SETJMP_H
    368        /* If you encounter a compiler error here, see the explanation
    369         * near the end of INSTALL.
    370         */
    371            __pngconf.h__ in libpng already includes setjmp.h;
    372            __dont__ include it again.;
    373 #      endif
    374 #    endif /* __linux__ */
    375 #  endif /* PNG_SKIP_SETJMP_CHECK */
    376 
    377    /* include setjmp.h for error handling */
    378 #  include <setjmp.h>
    379 
    380 #  ifdef __linux__
    381 #    ifdef PNG_SAVE_BSD_SOURCE
    382 #      ifndef _BSD_SOURCE
    383 #        define _BSD_SOURCE
    384 #      endif
    385 #      undef PNG_SAVE_BSD_SOURCE
    386 #    endif
    387 #  endif /* __linux__ */
    388 #endif /* PNG_SETJMP_SUPPORTED */
    389 
    390 #ifdef BSD
    391 #  include <strings.h>
    392 #else
    393 #  include <string.h>
    394 #endif
    395 
    396 /* Other defines for things like memory and the like can go here.  */
    397 #ifdef PNG_INTERNAL
    398 
    399 #include <stdlib.h>
    400 
    401 /* The functions exported by PNG_EXTERN are PNG_INTERNAL functions, which
    402  * aren't usually used outside the library (as far as I know), so it is
    403  * debatable if they should be exported at all.  In the future, when it is
    404  * possible to have run-time registry of chunk-handling functions, some of
    405  * these will be made available again.
    406 #define PNG_EXTERN extern
    407  */
    408 #define PNG_EXTERN
    409 
    410 /* Other defines specific to compilers can go here.  Try to keep
    411  * them inside an appropriate ifdef/endif pair for portability.
    412  */
    413 
    414 #ifdef PNG_FLOATING_POINT_SUPPORTED
    415 #  ifdef MACOS
    416      /* We need to check that <math.h> hasn't already been included earlier
    417       * as it seems it doesn't agree with <fp.h>, yet we should really use
    418       * <fp.h> if possible.
    419       */
    420 #    if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__)
    421 #      include <fp.h>
    422 #    endif
    423 #  else
    424 #    include <math.h>
    425 #  endif
    426 #  if defined(_AMIGA) && defined(__SASC) && defined(_M68881)
    427      /* Amiga SAS/C: We must include builtin FPU functions when compiling using
    428       * MATH=68881
    429       */
    430 #    include <m68881.h>
    431 #  endif
    432 #endif
    433 
    434 /* Codewarrior on NT has linking problems without this. */
    435 #if (defined(__MWERKS__) && defined(WIN32)) || defined(__STDC__)
    436 #  define PNG_ALWAYS_EXTERN
    437 #endif
    438 
    439 /* This provides the non-ANSI (far) memory allocation routines. */
    440 #if defined(__TURBOC__) && defined(__MSDOS__)
    441 #  include <mem.h>
    442 #  include <alloc.h>
    443 #endif
    444 
    445 /* I have no idea why is this necessary... */
    446 #if defined(_MSC_VER) && (defined(WIN32) || defined(_Windows) || \
    447     defined(_WINDOWS) || defined(_WIN32) || defined(__WIN32__))
    448 #  include <malloc.h>
    449 #endif
    450 
    451 /* This controls how fine the dithering gets.  As this allocates
    452  * a largish chunk of memory (32K), those who are not as concerned
    453  * with dithering quality can decrease some or all of these.
    454  */
    455 #ifndef PNG_DITHER_RED_BITS
    456 #  define PNG_DITHER_RED_BITS 5
    457 #endif
    458 #ifndef PNG_DITHER_GREEN_BITS
    459 #  define PNG_DITHER_GREEN_BITS 5
    460 #endif
    461 #ifndef PNG_DITHER_BLUE_BITS
    462 #  define PNG_DITHER_BLUE_BITS 5
    463 #endif
    464 
    465 /* This controls how fine the gamma correction becomes when you
    466  * are only interested in 8 bits anyway.  Increasing this value
    467  * results in more memory being used, and more pow() functions
    468  * being called to fill in the gamma tables.  Don't set this value
    469  * less then 8, and even that may not work (I haven't tested it).
    470  */
    471 
    472 #ifndef PNG_MAX_GAMMA_8
    473 #  define PNG_MAX_GAMMA_8 11
    474 #endif
    475 
    476 /* This controls how much a difference in gamma we can tolerate before
    477  * we actually start doing gamma conversion.
    478  */
    479 #ifndef PNG_GAMMA_THRESHOLD
    480 #  define PNG_GAMMA_THRESHOLD 0.05
    481 #endif
    482 
    483 #endif /* PNG_INTERNAL */
    484 
    485 /* The following uses const char * instead of char * for error
    486  * and warning message functions, so some compilers won't complain.
    487  * If you do not want to use const, define PNG_NO_CONST here.
    488  */
    489 
    490 #ifndef PNG_NO_CONST
    491 #  define PNG_CONST const
    492 #else
    493 #  define PNG_CONST
    494 #endif
    495 
    496 /* The following defines give you the ability to remove code from the
    497  * library that you will not be using.  I wish I could figure out how to
    498  * automate this, but I can't do that without making it seriously hard
    499  * on the users.  So if you are not using an ability, change the #define
    500  * to and #undef, and that part of the library will not be compiled.  If
    501  * your linker can't find a function, you may want to make sure the
    502  * ability is defined here.  Some of these depend upon some others being
    503  * defined.  I haven't figured out all the interactions here, so you may
    504  * have to experiment awhile to get everything to compile.  If you are
    505  * creating or using a shared library, you probably shouldn't touch this,
    506  * as it will affect the size of the structures, and this will cause bad
    507  * things to happen if the library and/or application ever change.
    508  */
    509 
    510 /* Any features you will not be using can be undef'ed here */
    511 
    512 /* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user
    513  * to turn it off with "*TRANSFORMS_NOT_SUPPORTED" or *PNG_NO_*_TRANSFORMS
    514  * on the compile line, then pick and choose which ones to define without
    515  * having to edit this file. It is safe to use the *TRANSFORMS_NOT_SUPPORTED
    516  * if you only want to have a png-compliant reader/writer but don't need
    517  * any of the extra transformations.  This saves about 80 kbytes in a
    518  * typical installation of the library. (PNG_NO_* form added in version
    519  * 1.0.1c, for consistency)
    520  */
    521 
    522 /* The size of the png_text structure changed in libpng-1.0.6 when
    523  * iTXt support was added.  iTXt support was turned off by default through
    524  * libpng-1.2.x, to support old apps that malloc the png_text structure
    525  * instead of calling png_set_text() and letting libpng malloc it.  It
    526  * will be turned on by default in libpng-1.4.0.
    527  */
    528 
    529 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
    530 #  ifndef PNG_NO_iTXt_SUPPORTED
    531 #    define PNG_NO_iTXt_SUPPORTED
    532 #  endif
    533 #  ifndef PNG_NO_READ_iTXt
    534 #    define PNG_NO_READ_iTXt
    535 #  endif
    536 #  ifndef PNG_NO_WRITE_iTXt
    537 #    define PNG_NO_WRITE_iTXt
    538 #  endif
    539 #endif
    540 
    541 #if !defined(PNG_NO_iTXt_SUPPORTED)
    542 #  if !defined(PNG_READ_iTXt_SUPPORTED) && !defined(PNG_NO_READ_iTXt)
    543 #    define PNG_READ_iTXt
    544 #  endif
    545 #  if !defined(PNG_WRITE_iTXt_SUPPORTED) && !defined(PNG_NO_WRITE_iTXt)
    546 #    define PNG_WRITE_iTXt
    547 #  endif
    548 #endif
    549 
    550 /* The following support, added after version 1.0.0, can be turned off here en
    551  * masse by defining PNG_LEGACY_SUPPORTED in case you need binary compatibility
    552  * with old applications that require the length of png_struct and png_info
    553  * to remain unchanged.
    554  */
    555 
    556 #ifdef PNG_LEGACY_SUPPORTED
    557 #  define PNG_NO_FREE_ME
    558 #  define PNG_NO_READ_UNKNOWN_CHUNKS
    559 #  define PNG_NO_WRITE_UNKNOWN_CHUNKS
    560 #  define PNG_NO_HANDLE_AS_UNKNOWN
    561 #  define PNG_NO_READ_USER_CHUNKS
    562 #  define PNG_NO_READ_iCCP
    563 #  define PNG_NO_WRITE_iCCP
    564 #  define PNG_NO_READ_iTXt
    565 #  define PNG_NO_WRITE_iTXt
    566 #  define PNG_NO_READ_sCAL
    567 #  define PNG_NO_WRITE_sCAL
    568 #  define PNG_NO_READ_sPLT
    569 #  define PNG_NO_WRITE_sPLT
    570 #  define PNG_NO_INFO_IMAGE
    571 #  define PNG_NO_READ_RGB_TO_GRAY
    572 #  define PNG_NO_READ_USER_TRANSFORM
    573 #  define PNG_NO_WRITE_USER_TRANSFORM
    574 #  define PNG_NO_USER_MEM
    575 #  define PNG_NO_READ_EMPTY_PLTE
    576 #  define PNG_NO_MNG_FEATURES
    577 #  define PNG_NO_FIXED_POINT_SUPPORTED
    578 #endif
    579 
    580 /* Ignore attempt to turn off both floating and fixed point support */
    581 #if !defined(PNG_FLOATING_POINT_SUPPORTED) || \
    582     !defined(PNG_NO_FIXED_POINT_SUPPORTED)
    583 #  define PNG_FIXED_POINT_SUPPORTED
    584 #endif
    585 
    586 #ifndef PNG_NO_FREE_ME
    587 #  define PNG_FREE_ME_SUPPORTED
    588 #endif
    589 
    590 #ifdef PNG_READ_SUPPORTED
    591 
    592 #if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \
    593       !defined(PNG_NO_READ_TRANSFORMS)
    594 #  define PNG_READ_TRANSFORMS_SUPPORTED
    595 #endif
    596 
    597 #ifdef PNG_READ_TRANSFORMS_SUPPORTED
    598 #  ifndef PNG_NO_READ_EXPAND
    599 #    define PNG_READ_EXPAND_SUPPORTED
    600 #  endif
    601 #  ifndef PNG_NO_READ_SHIFT
    602 #    define PNG_READ_SHIFT_SUPPORTED
    603 #  endif
    604 #  ifndef PNG_NO_READ_PACK
    605 #    define PNG_READ_PACK_SUPPORTED
    606 #  endif
    607 #  ifndef PNG_NO_READ_BGR
    608 #    define PNG_READ_BGR_SUPPORTED
    609 #  endif
    610 #  ifndef PNG_NO_READ_SWAP
    611 #    define PNG_READ_SWAP_SUPPORTED
    612 #  endif
    613 #  ifndef PNG_NO_READ_PACKSWAP
    614 #    define PNG_READ_PACKSWAP_SUPPORTED
    615 #  endif
    616 #  ifndef PNG_NO_READ_INVERT
    617 #    define PNG_READ_INVERT_SUPPORTED
    618 #  endif
    619 #  ifndef PNG_NO_READ_DITHER
    620 #    define PNG_READ_DITHER_SUPPORTED
    621 #  endif
    622 #  ifndef PNG_NO_READ_BACKGROUND
    623 #    define PNG_READ_BACKGROUND_SUPPORTED
    624 #  endif
    625 #  ifndef PNG_NO_READ_16_TO_8
    626 #    define PNG_READ_16_TO_8_SUPPORTED
    627 #  endif
    628 #  ifndef PNG_NO_READ_FILLER
    629 #    define PNG_READ_FILLER_SUPPORTED
    630 #  endif
    631 #  ifndef PNG_NO_READ_GAMMA
    632 #    define PNG_READ_GAMMA_SUPPORTED
    633 #  endif
    634 #  ifndef PNG_NO_READ_GRAY_TO_RGB
    635 #    define PNG_READ_GRAY_TO_RGB_SUPPORTED
    636 #  endif
    637 #  ifndef PNG_NO_READ_SWAP_ALPHA
    638 #    define PNG_READ_SWAP_ALPHA_SUPPORTED
    639 #  endif
    640 #  ifndef PNG_NO_READ_INVERT_ALPHA
    641 #    define PNG_READ_INVERT_ALPHA_SUPPORTED
    642 #  endif
    643 #  ifndef PNG_NO_READ_STRIP_ALPHA
    644 #    define PNG_READ_STRIP_ALPHA_SUPPORTED
    645 #  endif
    646 #  ifndef PNG_NO_READ_USER_TRANSFORM
    647 #    define PNG_READ_USER_TRANSFORM_SUPPORTED
    648 #  endif
    649 #  ifndef PNG_NO_READ_RGB_TO_GRAY
    650 #    define PNG_READ_RGB_TO_GRAY_SUPPORTED
    651 #  endif
    652 #endif /* PNG_READ_TRANSFORMS_SUPPORTED */
    653 
    654 /* PNG_PROGRESSIVE_READ_NOT_SUPPORTED is deprecated. */
    655 #if !defined(PNG_NO_PROGRESSIVE_READ) && \
    656  !defined(PNG_PROGRESSIVE_READ_NOT_SUPPORTED)  /* if you don't do progressive */
    657 #  define PNG_PROGRESSIVE_READ_SUPPORTED     /* reading.  This is not talking */
    658 #endif                               /* about interlacing capability!  You'll */
    659             /* still have interlacing unless you change the following define: */
    660 #define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */
    661 
    662 /* PNG_NO_SEQUENTIAL_READ_SUPPORTED is deprecated. */
    663 #if !defined(PNG_NO_SEQUENTIAL_READ) && \
    664     !defined(PNG_SEQUENTIAL_READ_SUPPORTED) && \
    665     !defined(PNG_NO_SEQUENTIAL_READ_SUPPORTED)
    666 #  define PNG_SEQUENTIAL_READ_SUPPORTED
    667 #endif
    668 
    669 #define PNG_READ_INTERLACING_SUPPORTED /* required in PNG-compliant decoders */
    670 
    671 #ifndef PNG_NO_READ_COMPOSITE_NODIV
    672 #  ifndef PNG_NO_READ_COMPOSITED_NODIV  /* libpng-1.0.x misspelling */
    673 #    define PNG_READ_COMPOSITE_NODIV_SUPPORTED  /* well tested on Intel, SGI */
    674 #  endif
    675 #endif
    676 
    677 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
    678 /* Deprecated, will be removed from version 2.0.0.
    679    Use PNG_MNG_FEATURES_SUPPORTED instead. */
    680 #ifndef PNG_NO_READ_EMPTY_PLTE
    681 #  define PNG_READ_EMPTY_PLTE_SUPPORTED
    682 #endif
    683 #endif
    684 
    685 #endif /* PNG_READ_SUPPORTED */
    686 
    687 #ifdef PNG_WRITE_SUPPORTED
    688 
    689 # if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \
    690     !defined(PNG_NO_WRITE_TRANSFORMS)
    691 #  define PNG_WRITE_TRANSFORMS_SUPPORTED
    692 #endif
    693 
    694 #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
    695 #  ifndef PNG_NO_WRITE_SHIFT
    696 #    define PNG_WRITE_SHIFT_SUPPORTED
    697 #  endif
    698 #  ifndef PNG_NO_WRITE_PACK
    699 #    define PNG_WRITE_PACK_SUPPORTED
    700 #  endif
    701 #  ifndef PNG_NO_WRITE_BGR
    702 #    define PNG_WRITE_BGR_SUPPORTED
    703 #  endif
    704 #  ifndef PNG_NO_WRITE_SWAP
    705 #    define PNG_WRITE_SWAP_SUPPORTED
    706 #  endif
    707 #  ifndef PNG_NO_WRITE_PACKSWAP
    708 #    define PNG_WRITE_PACKSWAP_SUPPORTED
    709 #  endif
    710 #  ifndef PNG_NO_WRITE_INVERT
    711 #    define PNG_WRITE_INVERT_SUPPORTED
    712 #  endif
    713 #  ifndef PNG_NO_WRITE_FILLER
    714 #    define PNG_WRITE_FILLER_SUPPORTED   /* same as WRITE_STRIP_ALPHA */
    715 #  endif
    716 #  ifndef PNG_NO_WRITE_SWAP_ALPHA
    717 #    define PNG_WRITE_SWAP_ALPHA_SUPPORTED
    718 #  endif
    719 #ifndef PNG_1_0_X
    720 #  ifndef PNG_NO_WRITE_INVERT_ALPHA
    721 #    define PNG_WRITE_INVERT_ALPHA_SUPPORTED
    722 #  endif
    723 #endif
    724 #  ifndef PNG_NO_WRITE_USER_TRANSFORM
    725 #    define PNG_WRITE_USER_TRANSFORM_SUPPORTED
    726 #  endif
    727 #endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */
    728 
    729 #if !defined(PNG_NO_WRITE_INTERLACING_SUPPORTED) && \
    730     !defined(PNG_WRITE_INTERLACING_SUPPORTED)
    731 #define PNG_WRITE_INTERLACING_SUPPORTED  /* not required for PNG-compliant
    732                                             encoders, but can cause trouble
    733                                             if left undefined */
    734 #endif
    735 
    736 #if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \
    737     !defined(PNG_WRITE_WEIGHTED_FILTER) && \
    738      defined(PNG_FLOATING_POINT_SUPPORTED)
    739 #  define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
    740 #endif
    741 
    742 #ifndef PNG_NO_WRITE_FLUSH
    743 #  define PNG_WRITE_FLUSH_SUPPORTED
    744 #endif
    745 
    746 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
    747 /* Deprecated, see PNG_MNG_FEATURES_SUPPORTED, above */
    748 #ifndef PNG_NO_WRITE_EMPTY_PLTE
    749 #  define PNG_WRITE_EMPTY_PLTE_SUPPORTED
    750 #endif
    751 #endif
    752 
    753 #endif /* PNG_WRITE_SUPPORTED */
    754 
    755 #ifndef PNG_1_0_X
    756 #  ifndef PNG_NO_ERROR_NUMBERS
    757 #    define PNG_ERROR_NUMBERS_SUPPORTED
    758 #  endif
    759 #endif /* PNG_1_0_X */
    760 
    761 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
    762     defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
    763 #  ifndef PNG_NO_USER_TRANSFORM_PTR
    764 #    define PNG_USER_TRANSFORM_PTR_SUPPORTED
    765 #  endif
    766 #endif
    767 
    768 #ifndef PNG_NO_STDIO
    769 #  define PNG_TIME_RFC1123_SUPPORTED
    770 #endif
    771 
    772 /* This adds extra functions in pngget.c for accessing data from the
    773  * info pointer (added in version 0.99)
    774  * png_get_image_width()
    775  * png_get_image_height()
    776  * png_get_bit_depth()
    777  * png_get_color_type()
    778  * png_get_compression_type()
    779  * png_get_filter_type()
    780  * png_get_interlace_type()
    781  * png_get_pixel_aspect_ratio()
    782  * png_get_pixels_per_meter()
    783  * png_get_x_offset_pixels()
    784  * png_get_y_offset_pixels()
    785  * png_get_x_offset_microns()
    786  * png_get_y_offset_microns()
    787  */
    788 #if !defined(PNG_NO_EASY_ACCESS) && !defined(PNG_EASY_ACCESS_SUPPORTED)
    789 #  define PNG_EASY_ACCESS_SUPPORTED
    790 #endif
    791 
    792 /* PNG_ASSEMBLER_CODE was enabled by default in version 1.2.0
    793  * and removed from version 1.2.20.  The following will be removed
    794  * from libpng-1.4.0
    795 */
    796 
    797 #if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_OPTIMIZED_CODE)
    798 #  ifndef PNG_OPTIMIZED_CODE_SUPPORTED
    799 #    define PNG_OPTIMIZED_CODE_SUPPORTED
    800 #  endif
    801 #endif
    802 
    803 #if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_ASSEMBLER_CODE)
    804 #  ifndef PNG_ASSEMBLER_CODE_SUPPORTED
    805 #    define PNG_ASSEMBLER_CODE_SUPPORTED
    806 #  endif
    807 
    808 #  if defined(__GNUC__) && defined(__x86_64__) && (__GNUC__ < 4)
    809      /* work around 64-bit gcc compiler bugs in gcc-3.x */
    810 #    if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
    811 #      define PNG_NO_MMX_CODE
    812 #    endif
    813 #  endif
    814 
    815 #  ifdef __APPLE__
    816 #    if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
    817 #      define PNG_NO_MMX_CODE
    818 #    endif
    819 #  endif
    820 
    821 #  if (defined(__MWERKS__) && ((__MWERKS__ < 0x0900) || macintosh))
    822 #    if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
    823 #      define PNG_NO_MMX_CODE
    824 #    endif
    825 #  endif
    826 
    827 #  if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
    828 #    define PNG_MMX_CODE_SUPPORTED
    829 #  endif
    830 
    831 #endif
    832 /* end of obsolete code to be removed from libpng-1.4.0 */
    833 
    834 /* Added at libpng-1.2.0 */
    835 #ifndef PNG_1_0_X
    836 #if !defined(PNG_NO_USER_MEM) && !defined(PNG_USER_MEM_SUPPORTED)
    837 #  define PNG_USER_MEM_SUPPORTED
    838 #endif
    839 #endif /* PNG_1_0_X */
    840 
    841 /* Added at libpng-1.2.6 */
    842 #ifndef PNG_1_0_X
    843 #  ifndef PNG_SET_USER_LIMITS_SUPPORTED
    844 #    ifndef PNG_NO_SET_USER_LIMITS
    845 #      define PNG_SET_USER_LIMITS_SUPPORTED
    846 #    endif
    847 #  endif
    848 #endif /* PNG_1_0_X */
    849 
    850 /* Added at libpng-1.0.53 and 1.2.43 */
    851 #ifndef PNG_USER_LIMITS_SUPPORTED
    852 #  ifndef PNG_NO_USER_LIMITS
    853 #    define PNG_USER_LIMITS_SUPPORTED
    854 #  endif
    855 #endif
    856 
    857 /* Added at libpng-1.0.16 and 1.2.6.  To accept all valid PNGS no matter
    858  * how large, set these limits to 0x7fffffffL
    859  */
    860 #ifndef PNG_USER_WIDTH_MAX
    861 #  define PNG_USER_WIDTH_MAX 1000000L
    862 #endif
    863 #ifndef PNG_USER_HEIGHT_MAX
    864 #  define PNG_USER_HEIGHT_MAX 1000000L
    865 #endif
    866 
    867 /* Added at libpng-1.2.43.  To accept all valid PNGs no matter
    868  * how large, set these two limits to 0.
    869  */
    870 #ifndef PNG_USER_CHUNK_CACHE_MAX
    871 #  define PNG_USER_CHUNK_CACHE_MAX 0
    872 #endif
    873 
    874 /* Added at libpng-1.2.43 */
    875 #ifndef PNG_USER_CHUNK_MALLOC_MAX
    876 #  define PNG_USER_CHUNK_MALLOC_MAX 0
    877 #endif
    878 
    879 #ifndef PNG_LITERAL_SHARP
    880 #  define PNG_LITERAL_SHARP 0x23
    881 #endif
    882 #ifndef PNG_LITERAL_LEFT_SQUARE_BRACKET
    883 #  define PNG_LITERAL_LEFT_SQUARE_BRACKET 0x5b
    884 #endif
    885 #ifndef PNG_LITERAL_RIGHT_SQUARE_BRACKET
    886 #  define PNG_LITERAL_RIGHT_SQUARE_BRACKET 0x5d
    887 #endif
    888 
    889 /* Added at libpng-1.2.34 */
    890 #ifndef PNG_STRING_NEWLINE
    891 #define PNG_STRING_NEWLINE "\n"
    892 #endif
    893 
    894 /* These are currently experimental features, define them if you want */
    895 
    896 /* very little testing */
    897 /*
    898 #ifdef PNG_READ_SUPPORTED
    899 #  ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
    900 #    define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
    901 #  endif
    902 #endif
    903 */
    904 
    905 /* This is only for PowerPC big-endian and 680x0 systems */
    906 /* some testing */
    907 /*
    908 #ifndef PNG_READ_BIG_ENDIAN_SUPPORTED
    909 #  define PNG_READ_BIG_ENDIAN_SUPPORTED
    910 #endif
    911 */
    912 
    913 /* Buggy compilers (e.g., gcc 2.7.2.2) need this */
    914 /*
    915 #define PNG_NO_POINTER_INDEXING
    916 */
    917 
    918 #if !defined(PNG_NO_POINTER_INDEXING) && \
    919     !defined(PNG_POINTER_INDEXING_SUPPORTED)
    920 #  define PNG_POINTER_INDEXING_SUPPORTED
    921 #endif
    922 
    923 /* These functions are turned off by default, as they will be phased out. */
    924 /*
    925 #define  PNG_USELESS_TESTS_SUPPORTED
    926 #define  PNG_CORRECT_PALETTE_SUPPORTED
    927 */
    928 
    929 /* Any chunks you are not interested in, you can undef here.  The
    930  * ones that allocate memory may be expecially important (hIST,
    931  * tEXt, zTXt, tRNS, pCAL).  Others will just save time and make png_info
    932  * a bit smaller.
    933  */
    934 
    935 #if defined(PNG_READ_SUPPORTED) && \
    936     !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
    937     !defined(PNG_NO_READ_ANCILLARY_CHUNKS)
    938 #  define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
    939 #endif
    940 
    941 #if defined(PNG_WRITE_SUPPORTED) && \
    942     !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
    943     !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS)
    944 #  define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
    945 #endif
    946 
    947 #ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
    948 
    949 #ifdef PNG_NO_READ_TEXT
    950 #  define PNG_NO_READ_iTXt
    951 #  define PNG_NO_READ_tEXt
    952 #  define PNG_NO_READ_zTXt
    953 #endif
    954 #ifndef PNG_NO_READ_bKGD
    955 #  define PNG_READ_bKGD_SUPPORTED
    956 #  define PNG_bKGD_SUPPORTED
    957 #endif
    958 #ifndef PNG_NO_READ_cHRM
    959 #  define PNG_READ_cHRM_SUPPORTED
    960 #  define PNG_cHRM_SUPPORTED
    961 #endif
    962 #ifndef PNG_NO_READ_gAMA
    963 #  define PNG_READ_gAMA_SUPPORTED
    964 #  define PNG_gAMA_SUPPORTED
    965 #endif
    966 #ifndef PNG_NO_READ_hIST
    967 #  define PNG_READ_hIST_SUPPORTED
    968 #  define PNG_hIST_SUPPORTED
    969 #endif
    970 #ifndef PNG_NO_READ_iCCP
    971 #  define PNG_READ_iCCP_SUPPORTED
    972 #  define PNG_iCCP_SUPPORTED
    973 #endif
    974 #ifndef PNG_NO_READ_iTXt
    975 #  ifndef PNG_READ_iTXt_SUPPORTED
    976 #    define PNG_READ_iTXt_SUPPORTED
    977 #  endif
    978 #  ifndef PNG_iTXt_SUPPORTED
    979 #    define PNG_iTXt_SUPPORTED
    980 #  endif
    981 #endif
    982 #ifndef PNG_NO_READ_oFFs
    983 #  define PNG_READ_oFFs_SUPPORTED
    984 #  define PNG_oFFs_SUPPORTED
    985 #endif
    986 #ifndef PNG_NO_READ_pCAL
    987 #  define PNG_READ_pCAL_SUPPORTED
    988 #  define PNG_pCAL_SUPPORTED
    989 #endif
    990 #ifndef PNG_NO_READ_sCAL
    991 #  define PNG_READ_sCAL_SUPPORTED
    992 #  define PNG_sCAL_SUPPORTED
    993 #endif
    994 #ifndef PNG_NO_READ_pHYs
    995 #  define PNG_READ_pHYs_SUPPORTED
    996 #  define PNG_pHYs_SUPPORTED
    997 #endif
    998 #ifndef PNG_NO_READ_sBIT
    999 #  define PNG_READ_sBIT_SUPPORTED
   1000 #  define PNG_sBIT_SUPPORTED
   1001 #endif
   1002 #ifndef PNG_NO_READ_sPLT
   1003 #  define PNG_READ_sPLT_SUPPORTED
   1004 #  define PNG_sPLT_SUPPORTED
   1005 #endif
   1006 #ifndef PNG_NO_READ_sRGB
   1007 #  define PNG_READ_sRGB_SUPPORTED
   1008 #  define PNG_sRGB_SUPPORTED
   1009 #endif
   1010 #ifndef PNG_NO_READ_tEXt
   1011 #  define PNG_READ_tEXt_SUPPORTED
   1012 #  define PNG_tEXt_SUPPORTED
   1013 #endif
   1014 #ifndef PNG_NO_READ_tIME
   1015 #  define PNG_READ_tIME_SUPPORTED
   1016 #  define PNG_tIME_SUPPORTED
   1017 #endif
   1018 #ifndef PNG_NO_READ_tRNS
   1019 #  define PNG_READ_tRNS_SUPPORTED
   1020 #  define PNG_tRNS_SUPPORTED
   1021 #endif
   1022 #ifndef PNG_NO_READ_zTXt
   1023 #  define PNG_READ_zTXt_SUPPORTED
   1024 #  define PNG_zTXt_SUPPORTED
   1025 #endif
   1026 #ifndef PNG_NO_READ_OPT_PLTE
   1027 #  define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */
   1028 #endif                      /* optional PLTE chunk in RGB and RGBA images */
   1029 #if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \
   1030     defined(PNG_READ_zTXt_SUPPORTED)
   1031 #  define PNG_READ_TEXT_SUPPORTED
   1032 #  define PNG_TEXT_SUPPORTED
   1033 #endif
   1034 
   1035 #endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */
   1036 
   1037 #ifndef PNG_NO_READ_UNKNOWN_CHUNKS
   1038 #  define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
   1039 #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
   1040 #    define PNG_UNKNOWN_CHUNKS_SUPPORTED
   1041 #  endif
   1042 #endif
   1043 #if !defined(PNG_NO_READ_USER_CHUNKS) && \
   1044      defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
   1045 #  define PNG_READ_USER_CHUNKS_SUPPORTED
   1046 #  define PNG_USER_CHUNKS_SUPPORTED
   1047 #  ifdef PNG_NO_READ_UNKNOWN_CHUNKS
   1048 #    undef PNG_NO_READ_UNKNOWN_CHUNKS
   1049 #  endif
   1050 #  ifdef PNG_NO_HANDLE_AS_UNKNOWN
   1051 #    undef PNG_NO_HANDLE_AS_UNKNOWN
   1052 #  endif
   1053 #endif
   1054 
   1055 #ifndef PNG_NO_HANDLE_AS_UNKNOWN
   1056 #  ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
   1057 #    define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
   1058 #  endif
   1059 #endif
   1060 
   1061 #ifdef PNG_WRITE_SUPPORTED
   1062 #ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
   1063 
   1064 #ifdef PNG_NO_WRITE_TEXT
   1065 #  define PNG_NO_WRITE_iTXt
   1066 #  define PNG_NO_WRITE_tEXt
   1067 #  define PNG_NO_WRITE_zTXt
   1068 #endif
   1069 #ifndef PNG_NO_WRITE_bKGD
   1070 #  define PNG_WRITE_bKGD_SUPPORTED
   1071 #  ifndef PNG_bKGD_SUPPORTED
   1072 #    define PNG_bKGD_SUPPORTED
   1073 #  endif
   1074 #endif
   1075 #ifndef PNG_NO_WRITE_cHRM
   1076 #  define PNG_WRITE_cHRM_SUPPORTED
   1077 #  ifndef PNG_cHRM_SUPPORTED
   1078 #    define PNG_cHRM_SUPPORTED
   1079 #  endif
   1080 #endif
   1081 #ifndef PNG_NO_WRITE_gAMA
   1082 #  define PNG_WRITE_gAMA_SUPPORTED
   1083 #  ifndef PNG_gAMA_SUPPORTED
   1084 #    define PNG_gAMA_SUPPORTED
   1085 #  endif
   1086 #endif
   1087 #ifndef PNG_NO_WRITE_hIST
   1088 #  define PNG_WRITE_hIST_SUPPORTED
   1089 #  ifndef PNG_hIST_SUPPORTED
   1090 #    define PNG_hIST_SUPPORTED
   1091 #  endif
   1092 #endif
   1093 #ifndef PNG_NO_WRITE_iCCP
   1094 #  define PNG_WRITE_iCCP_SUPPORTED
   1095 #  ifndef PNG_iCCP_SUPPORTED
   1096 #    define PNG_iCCP_SUPPORTED
   1097 #  endif
   1098 #endif
   1099 #ifndef PNG_NO_WRITE_iTXt
   1100 #  ifndef PNG_WRITE_iTXt_SUPPORTED
   1101 #    define PNG_WRITE_iTXt_SUPPORTED
   1102 #  endif
   1103 #  ifndef PNG_iTXt_SUPPORTED
   1104 #    define PNG_iTXt_SUPPORTED
   1105 #  endif
   1106 #endif
   1107 #ifndef PNG_NO_WRITE_oFFs
   1108 #  define PNG_WRITE_oFFs_SUPPORTED
   1109 #  ifndef PNG_oFFs_SUPPORTED
   1110 #    define PNG_oFFs_SUPPORTED
   1111 #  endif
   1112 #endif
   1113 #ifndef PNG_NO_WRITE_pCAL
   1114 #  define PNG_WRITE_pCAL_SUPPORTED
   1115 #  ifndef PNG_pCAL_SUPPORTED
   1116 #    define PNG_pCAL_SUPPORTED
   1117 #  endif
   1118 #endif
   1119 #ifndef PNG_NO_WRITE_sCAL
   1120 #  define PNG_WRITE_sCAL_SUPPORTED
   1121 #  ifndef PNG_sCAL_SUPPORTED
   1122 #    define PNG_sCAL_SUPPORTED
   1123 #  endif
   1124 #endif
   1125 #ifndef PNG_NO_WRITE_pHYs
   1126 #  define PNG_WRITE_pHYs_SUPPORTED
   1127 #  ifndef PNG_pHYs_SUPPORTED
   1128 #    define PNG_pHYs_SUPPORTED
   1129 #  endif
   1130 #endif
   1131 #ifndef PNG_NO_WRITE_sBIT
   1132 #  define PNG_WRITE_sBIT_SUPPORTED
   1133 #  ifndef PNG_sBIT_SUPPORTED
   1134 #    define PNG_sBIT_SUPPORTED
   1135 #  endif
   1136 #endif
   1137 #ifndef PNG_NO_WRITE_sPLT
   1138 #  define PNG_WRITE_sPLT_SUPPORTED
   1139 #  ifndef PNG_sPLT_SUPPORTED
   1140 #    define PNG_sPLT_SUPPORTED
   1141 #  endif
   1142 #endif
   1143 #ifndef PNG_NO_WRITE_sRGB
   1144 #  define PNG_WRITE_sRGB_SUPPORTED
   1145 #  ifndef PNG_sRGB_SUPPORTED
   1146 #    define PNG_sRGB_SUPPORTED
   1147 #  endif
   1148 #endif
   1149 #ifndef PNG_NO_WRITE_tEXt
   1150 #  define PNG_WRITE_tEXt_SUPPORTED
   1151 #  ifndef PNG_tEXt_SUPPORTED
   1152 #    define PNG_tEXt_SUPPORTED
   1153 #  endif
   1154 #endif
   1155 #ifndef PNG_NO_WRITE_tIME
   1156 #  define PNG_WRITE_tIME_SUPPORTED
   1157 #  ifndef PNG_tIME_SUPPORTED
   1158 #    define PNG_tIME_SUPPORTED
   1159 #  endif
   1160 #endif
   1161 #ifndef PNG_NO_WRITE_tRNS
   1162 #  define PNG_WRITE_tRNS_SUPPORTED
   1163 #  ifndef PNG_tRNS_SUPPORTED
   1164 #    define PNG_tRNS_SUPPORTED
   1165 #  endif
   1166 #endif
   1167 #ifndef PNG_NO_WRITE_zTXt
   1168 #  define PNG_WRITE_zTXt_SUPPORTED
   1169 #  ifndef PNG_zTXt_SUPPORTED
   1170 #    define PNG_zTXt_SUPPORTED
   1171 #  endif
   1172 #endif
   1173 #if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
   1174     defined(PNG_WRITE_zTXt_SUPPORTED)
   1175 #  define PNG_WRITE_TEXT_SUPPORTED
   1176 #  ifndef PNG_TEXT_SUPPORTED
   1177 #    define PNG_TEXT_SUPPORTED
   1178 #  endif
   1179 #endif
   1180 
   1181 #ifdef PNG_WRITE_tIME_SUPPORTED
   1182 #  ifndef PNG_NO_CONVERT_tIME
   1183 #    ifndef _WIN32_WCE
   1184 /*   The "tm" structure is not supported on WindowsCE */
   1185 #      ifndef PNG_CONVERT_tIME_SUPPORTED
   1186 #        define PNG_CONVERT_tIME_SUPPORTED
   1187 #      endif
   1188 #   endif
   1189 #  endif
   1190 #endif
   1191 
   1192 #endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */
   1193 
   1194 #if !defined(PNG_NO_WRITE_FILTER) && !defined(PNG_WRITE_FILTER_SUPPORTED)
   1195 #  define PNG_WRITE_FILTER_SUPPORTED
   1196 #endif
   1197 
   1198 #ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS
   1199 #  define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
   1200 #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
   1201 #    define PNG_UNKNOWN_CHUNKS_SUPPORTED
   1202 #  endif
   1203 #endif
   1204 
   1205 #ifndef PNG_NO_HANDLE_AS_UNKNOWN
   1206 #  ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
   1207 #    define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
   1208 #  endif
   1209 #endif
   1210 #endif /* PNG_WRITE_SUPPORTED */
   1211 
   1212 /* Turn this off to disable png_read_png() and
   1213  * png_write_png() and leave the row_pointers member
   1214  * out of the info structure.
   1215  */
   1216 #ifndef PNG_NO_INFO_IMAGE
   1217 #  define PNG_INFO_IMAGE_SUPPORTED
   1218 #endif
   1219 
   1220 /* Need the time information for converting tIME chunks */
   1221 #ifdef PNG_CONVERT_tIME_SUPPORTED
   1222      /* "time.h" functions are not supported on WindowsCE */
   1223 #    include <time.h>
   1224 #endif
   1225 
   1226 /* Some typedefs to get us started.  These should be safe on most of the
   1227  * common platforms.  The typedefs should be at least as large as the
   1228  * numbers suggest (a png_uint_32 must be at least 32 bits long), but they
   1229  * don't have to be exactly that size.  Some compilers dislike passing
   1230  * unsigned shorts as function parameters, so you may be better off using
   1231  * unsigned int for png_uint_16.  Likewise, for 64-bit systems, you may
   1232  * want to have unsigned int for png_uint_32 instead of unsigned long.
   1233  */
   1234 
   1235 typedef unsigned long png_uint_32;
   1236 typedef long png_int_32;
   1237 typedef unsigned short png_uint_16;
   1238 typedef short png_int_16;
   1239 typedef unsigned char png_byte;
   1240 
   1241 /* This is usually size_t.  It is typedef'ed just in case you need it to
   1242    change (I'm not sure if you will or not, so I thought I'd be safe) */
   1243 #ifdef PNG_SIZE_T
   1244    typedef PNG_SIZE_T png_size_t;
   1245 #  define png_sizeof(x) png_convert_size(sizeof(x))
   1246 #else
   1247    typedef size_t png_size_t;
   1248 #  define png_sizeof(x) sizeof(x)
   1249 #endif
   1250 
   1251 /* The following is needed for medium model support.  It cannot be in the
   1252  * PNG_INTERNAL section.  Needs modification for other compilers besides
   1253  * MSC.  Model independent support declares all arrays and pointers to be
   1254  * large using the far keyword.  The zlib version used must also support
   1255  * model independent data.  As of version zlib 1.0.4, the necessary changes
   1256  * have been made in zlib.  The USE_FAR_KEYWORD define triggers other
   1257  * changes that are needed. (Tim Wegner)
   1258  */
   1259 
   1260 /* Separate compiler dependencies (problem here is that zlib.h always
   1261    defines FAR. (SJT) */
   1262 #ifdef __BORLANDC__
   1263 #  if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)
   1264 #    define LDATA 1
   1265 #  else
   1266 #    define LDATA 0
   1267 #  endif
   1268    /* GRR:  why is Cygwin in here?  Cygwin is not Borland C... */
   1269 #  if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)
   1270 #    define PNG_MAX_MALLOC_64K
   1271 #    if (LDATA != 1)
   1272 #      ifndef FAR
   1273 #        define FAR __far
   1274 #      endif
   1275 #      define USE_FAR_KEYWORD
   1276 #    endif   /* LDATA != 1 */
   1277      /* Possibly useful for moving data out of default segment.
   1278       * Uncomment it if you want. Could also define FARDATA as
   1279       * const if your compiler supports it. (SJT)
   1280 #    define FARDATA FAR
   1281       */
   1282 #  endif  /* __WIN32__, __FLAT__, __CYGWIN__ */
   1283 #endif   /* __BORLANDC__ */
   1284 
   1285 
   1286 /* Suggest testing for specific compiler first before testing for
   1287  * FAR.  The Watcom compiler defines both __MEDIUM__ and M_I86MM,
   1288  * making reliance oncertain keywords suspect. (SJT)
   1289  */
   1290 
   1291 /* MSC Medium model */
   1292 #ifdef FAR
   1293 #  ifdef M_I86MM
   1294 #    define USE_FAR_KEYWORD
   1295 #    define FARDATA FAR
   1296 #    include <dos.h>
   1297 #  endif
   1298 #endif
   1299 
   1300 /* SJT: default case */
   1301 #ifndef FAR
   1302 #  define FAR
   1303 #endif
   1304 
   1305 /* At this point FAR is always defined */
   1306 #ifndef FARDATA
   1307 #  define FARDATA
   1308 #endif
   1309 
   1310 /* Typedef for floating-point numbers that are converted
   1311    to fixed-point with a multiple of 100,000, e.g., int_gamma */
   1312 typedef png_int_32 png_fixed_point;
   1313 
   1314 /* Add typedefs for pointers */
   1315 typedef void            FAR * png_voidp;
   1316 typedef png_byte        FAR * png_bytep;
   1317 typedef png_uint_32     FAR * png_uint_32p;
   1318 typedef png_int_32      FAR * png_int_32p;
   1319 typedef png_uint_16     FAR * png_uint_16p;
   1320 typedef png_int_16      FAR * png_int_16p;
   1321 typedef PNG_CONST char  FAR * png_const_charp;
   1322 typedef char            FAR * png_charp;
   1323 typedef png_fixed_point FAR * png_fixed_point_p;
   1324 
   1325 #ifndef PNG_NO_STDIO
   1326 #ifdef _WIN32_WCE
   1327 typedef HANDLE                png_FILE_p;
   1328 #else
   1329 typedef FILE                * png_FILE_p;
   1330 #endif
   1331 #endif
   1332 
   1333 #ifdef PNG_FLOATING_POINT_SUPPORTED
   1334 typedef double          FAR * png_doublep;
   1335 #endif
   1336 
   1337 /* Pointers to pointers; i.e. arrays */
   1338 typedef png_byte        FAR * FAR * png_bytepp;
   1339 typedef png_uint_32     FAR * FAR * png_uint_32pp;
   1340 typedef png_int_32      FAR * FAR * png_int_32pp;
   1341 typedef png_uint_16     FAR * FAR * png_uint_16pp;
   1342 typedef png_int_16      FAR * FAR * png_int_16pp;
   1343 typedef PNG_CONST char  FAR * FAR * png_const_charpp;
   1344 typedef char            FAR * FAR * png_charpp;
   1345 typedef png_fixed_point FAR * FAR * png_fixed_point_pp;
   1346 #ifdef PNG_FLOATING_POINT_SUPPORTED
   1347 typedef double          FAR * FAR * png_doublepp;
   1348 #endif
   1349 
   1350 /* Pointers to pointers to pointers; i.e., pointer to array */
   1351 typedef char            FAR * FAR * FAR * png_charppp;
   1352 
   1353 #if defined(PNG_1_0_X) || defined(PNG_1_2_X)
   1354 /* SPC -  Is this stuff deprecated? */
   1355 /* It'll be removed as of libpng-1.4.0 - GR-P */
   1356 /* libpng typedefs for types in zlib. If zlib changes
   1357  * or another compression library is used, then change these.
   1358  * Eliminates need to change all the source files.
   1359  */
   1360 typedef charf *         png_zcharp;
   1361 typedef charf * FAR *   png_zcharpp;
   1362 typedef z_stream FAR *  png_zstreamp;
   1363 #endif /* (PNG_1_0_X) || defined(PNG_1_2_X) */
   1364 
   1365 /*
   1366  * Define PNG_BUILD_DLL if the module being built is a Windows
   1367  * LIBPNG DLL.
   1368  *
   1369  * Define PNG_USE_DLL if you want to *link* to the Windows LIBPNG DLL.
   1370  * It is equivalent to Microsoft predefined macro _DLL that is
   1371  * automatically defined when you compile using the share
   1372  * version of the CRT (C Run-Time library)
   1373  *
   1374  * The cygwin mods make this behavior a little different:
   1375  * Define PNG_BUILD_DLL if you are building a dll for use with cygwin
   1376  * Define PNG_STATIC if you are building a static library for use with cygwin,
   1377  *   -or- if you are building an application that you want to link to the
   1378  *   static library.
   1379  * PNG_USE_DLL is defined by default (no user action needed) unless one of
   1380  *   the other flags is defined.
   1381  */
   1382 
   1383 #if !defined(PNG_DLL) && (defined(PNG_BUILD_DLL) || defined(PNG_USE_DLL))
   1384 #  define PNG_DLL
   1385 #endif
   1386 /* If CYGWIN, then disallow GLOBAL ARRAYS unless building a static lib.
   1387  * When building a static lib, default to no GLOBAL ARRAYS, but allow
   1388  * command-line override
   1389  */
   1390 #ifdef __CYGWIN__
   1391 #  ifndef PNG_STATIC
   1392 #    ifdef PNG_USE_GLOBAL_ARRAYS
   1393 #      undef PNG_USE_GLOBAL_ARRAYS
   1394 #    endif
   1395 #    ifndef PNG_USE_LOCAL_ARRAYS
   1396 #      define PNG_USE_LOCAL_ARRAYS
   1397 #    endif
   1398 #  else
   1399 #    if defined(PNG_USE_LOCAL_ARRAYS) || defined(PNG_NO_GLOBAL_ARRAYS)
   1400 #      ifdef PNG_USE_GLOBAL_ARRAYS
   1401 #        undef PNG_USE_GLOBAL_ARRAYS
   1402 #      endif
   1403 #    endif
   1404 #  endif
   1405 #  if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
   1406 #    define PNG_USE_LOCAL_ARRAYS
   1407 #  endif
   1408 #endif
   1409 
   1410 /* Do not use global arrays (helps with building DLL's)
   1411  * They are no longer used in libpng itself, since version 1.0.5c,
   1412  * but might be required for some pre-1.0.5c applications.
   1413  */
   1414 #if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
   1415 #  if defined(PNG_NO_GLOBAL_ARRAYS) || \
   1416       (defined(__GNUC__) && defined(PNG_DLL)) || defined(_MSC_VER)
   1417 #    define PNG_USE_LOCAL_ARRAYS
   1418 #  else
   1419 #    define PNG_USE_GLOBAL_ARRAYS
   1420 #  endif
   1421 #endif
   1422 
   1423 #ifdef __CYGWIN__
   1424 #  undef PNGAPI
   1425 #  define PNGAPI __cdecl
   1426 #  undef PNG_IMPEXP
   1427 #  define PNG_IMPEXP
   1428 #endif
   1429 
   1430 /* If you define PNGAPI, e.g., with compiler option "-DPNGAPI=__stdcall",
   1431  * you may get warnings regarding the linkage of png_zalloc and png_zfree.
   1432  * Don't ignore those warnings; you must also reset the default calling
   1433  * convention in your compiler to match your PNGAPI, and you must build
   1434  * zlib and your applications the same way you build libpng.
   1435  */
   1436 
   1437 #if defined(__MINGW32__) && !defined(PNG_MODULEDEF)
   1438 #  ifndef PNG_NO_MODULEDEF
   1439 #    define PNG_NO_MODULEDEF
   1440 #  endif
   1441 #endif
   1442 
   1443 #if !defined(PNG_IMPEXP) && defined(PNG_BUILD_DLL) && !defined(PNG_NO_MODULEDEF)
   1444 #  define PNG_IMPEXP
   1445 #endif
   1446 
   1447 #if defined(PNG_DLL) || defined(_DLL) || defined(__DLL__ ) || \
   1448     (( defined(_Windows) || defined(_WINDOWS) || \
   1449        defined(WIN32) || defined(_WIN32) || defined(__WIN32__) ))
   1450 
   1451 #  ifndef PNGAPI
   1452 #     if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
   1453 #        define PNGAPI __cdecl
   1454 #     else
   1455 #        define PNGAPI _cdecl
   1456 #     endif
   1457 #  endif
   1458 
   1459 #  if !defined(PNG_IMPEXP) && (!defined(PNG_DLL) || \
   1460        0 /* WINCOMPILER_WITH_NO_SUPPORT_FOR_DECLIMPEXP */)
   1461 #     define PNG_IMPEXP
   1462 #  endif
   1463 
   1464 #  ifndef PNG_IMPEXP
   1465 
   1466 #     define PNG_EXPORT_TYPE1(type,symbol)  PNG_IMPEXP type PNGAPI symbol
   1467 #     define PNG_EXPORT_TYPE2(type,symbol)  type PNG_IMPEXP PNGAPI symbol
   1468 
   1469       /* Borland/Microsoft */
   1470 #     if defined(_MSC_VER) || defined(__BORLANDC__)
   1471 #        if (_MSC_VER >= 800) || (__BORLANDC__ >= 0x500)
   1472 #           define PNG_EXPORT PNG_EXPORT_TYPE1
   1473 #        else
   1474 #           define PNG_EXPORT PNG_EXPORT_TYPE2
   1475 #           ifdef PNG_BUILD_DLL
   1476 #              define PNG_IMPEXP __export
   1477 #           else
   1478 #              define PNG_IMPEXP /*__import */ /* doesn't exist AFAIK in
   1479                                                  VC++ */
   1480 #           endif                             /* Exists in Borland C++ for
   1481                                                  C++ classes (== huge) */
   1482 #        endif
   1483 #     endif
   1484 
   1485 #     ifndef PNG_IMPEXP
   1486 #        ifdef PNG_BUILD_DLL
   1487 #           define PNG_IMPEXP __declspec(dllexport)
   1488 #        else
   1489 #           define PNG_IMPEXP __declspec(dllimport)
   1490 #        endif
   1491 #     endif
   1492 #  endif  /* PNG_IMPEXP */
   1493 #else /* !(DLL || non-cygwin WINDOWS) */
   1494 #   if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
   1495 #      ifndef PNGAPI
   1496 #         define PNGAPI _System
   1497 #      endif
   1498 #   else
   1499 #      if 0 /* ... other platforms, with other meanings */
   1500 #      endif
   1501 #   endif
   1502 #endif
   1503 
   1504 #ifndef PNGAPI
   1505 #  define PNGAPI
   1506 #endif
   1507 #ifndef PNG_IMPEXP
   1508 #  define PNG_IMPEXP
   1509 #endif
   1510 
   1511 #ifdef PNG_BUILDSYMS
   1512 #  ifndef PNG_EXPORT
   1513 #    define PNG_EXPORT(type,symbol) PNG_FUNCTION_EXPORT symbol END
   1514 #  endif
   1515 #  ifdef PNG_USE_GLOBAL_ARRAYS
   1516 #    ifndef PNG_EXPORT_VAR
   1517 #      define PNG_EXPORT_VAR(type) PNG_DATA_EXPORT
   1518 #    endif
   1519 #  endif
   1520 #endif
   1521 
   1522 #ifndef PNG_EXPORT
   1523 #  define PNG_EXPORT(type,symbol) PNG_IMPEXP type PNGAPI symbol
   1524 #endif
   1525 
   1526 #ifdef PNG_USE_GLOBAL_ARRAYS
   1527 #  ifndef PNG_EXPORT_VAR
   1528 #    define PNG_EXPORT_VAR(type) extern PNG_IMPEXP type
   1529 #  endif
   1530 #endif
   1531 
   1532 #ifdef PNG_PEDANTIC_WARNINGS
   1533 #  ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED
   1534 #    define PNG_PEDANTIC_WARNINGS_SUPPORTED
   1535 #  endif
   1536 #endif
   1537 
   1538 #ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED
   1539 /* Support for compiler specific function attributes.  These are used
   1540  * so that where compiler support is available incorrect use of API
   1541  * functions in png.h will generate compiler warnings.  Added at libpng
   1542  * version 1.2.41.
   1543  */
   1544 #  ifdef __GNUC__
   1545 #    ifndef PNG_USE_RESULT
   1546 #      define PNG_USE_RESULT __attribute__((__warn_unused_result__))
   1547 #    endif
   1548 #    ifndef PNG_NORETURN
   1549 #      define PNG_NORETURN   __attribute__((__noreturn__))
   1550 #    endif
   1551 #    ifndef PNG_ALLOCATED
   1552 #      define PNG_ALLOCATED  __attribute__((__malloc__))
   1553 #    endif
   1554 
   1555     /* This specifically protects structure members that should only be
   1556      * accessed from within the library, therefore should be empty during
   1557      * a library build.
   1558      */
   1559 #    ifndef PNG_DEPRECATED
   1560 #      define PNG_DEPRECATED __attribute__((__deprecated__))
   1561 #    endif
   1562 #    ifndef PNG_DEPSTRUCT
   1563 #      define PNG_DEPSTRUCT  __attribute__((__deprecated__))
   1564 #    endif
   1565 #    ifndef PNG_PRIVATE
   1566 #      if 0 /* Doesn't work so we use deprecated instead*/
   1567 #        define PNG_PRIVATE \
   1568           __attribute__((warning("This function is not exported by libpng.")))
   1569 #      else
   1570 #        define PNG_PRIVATE \
   1571           __attribute__((__deprecated__))
   1572 #      endif
   1573 #    endif /* PNG_PRIVATE */
   1574 #  endif /* __GNUC__ */
   1575 #endif /* PNG_PEDANTIC_WARNINGS */
   1576 
   1577 #ifndef PNG_DEPRECATED
   1578 #  define PNG_DEPRECATED  /* Use of this function is deprecated */
   1579 #endif
   1580 #ifndef PNG_USE_RESULT
   1581 #  define PNG_USE_RESULT  /* The result of this function must be checked */
   1582 #endif
   1583 #ifndef PNG_NORETURN
   1584 #  define PNG_NORETURN    /* This function does not return */
   1585 #endif
   1586 #ifndef PNG_ALLOCATED
   1587 #  define PNG_ALLOCATED   /* The result of the function is new memory */
   1588 #endif
   1589 #ifndef PNG_DEPSTRUCT
   1590 #  define PNG_DEPSTRUCT   /* Access to this struct member is deprecated */
   1591 #endif
   1592 #ifndef PNG_PRIVATE
   1593 #  define PNG_PRIVATE     /* This is a private libpng function */
   1594 #endif
   1595 
   1596 /* User may want to use these so they are not in PNG_INTERNAL. Any library
   1597  * functions that are passed far data must be model independent.
   1598  */
   1599 
   1600 #ifndef PNG_ABORT
   1601 #  define PNG_ABORT() abort()
   1602 #endif
   1603 
   1604 #ifdef PNG_SETJMP_SUPPORTED
   1605 #  define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf)
   1606 #else
   1607 #  define png_jmpbuf(png_ptr) \
   1608    (LIBPNG_WAS_COMPILED_WITH__PNG_SETJMP_NOT_SUPPORTED)
   1609 #endif
   1610 
   1611 #ifdef USE_FAR_KEYWORD  /* memory model independent fns */
   1612 /* Use this to make far-to-near assignments */
   1613 #  define CHECK   1
   1614 #  define NOCHECK 0
   1615 #  define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK))
   1616 #  define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK))
   1617 #  define png_snprintf _fsnprintf   /* Added to v 1.2.19 */
   1618 #  define png_strlen  _fstrlen
   1619 #  define png_memcmp  _fmemcmp    /* SJT: added */
   1620 #  define png_memcpy  _fmemcpy
   1621 #  define png_memset  _fmemset
   1622 #else /* Use the usual functions */
   1623 #  define CVT_PTR(ptr)         (ptr)
   1624 #  define CVT_PTR_NOCHECK(ptr) (ptr)
   1625 #  ifndef PNG_NO_SNPRINTF
   1626 #    ifdef _MSC_VER
   1627 #      define png_snprintf _snprintf   /* Added to v 1.2.19 */
   1628 #      define png_snprintf2 _snprintf
   1629 #      define png_snprintf6 _snprintf
   1630 #    else
   1631 #      define png_snprintf snprintf   /* Added to v 1.2.19 */
   1632 #      define png_snprintf2 snprintf
   1633 #      define png_snprintf6 snprintf
   1634 #    endif
   1635 #  else
   1636      /* You don't have or don't want to use snprintf().  Caution: Using
   1637       * sprintf instead of snprintf exposes your application to accidental
   1638       * or malevolent buffer overflows.  If you don't have snprintf()
   1639       * as a general rule you should provide one (you can get one from
   1640       * Portable OpenSSH).
   1641       */
   1642 #    define png_snprintf(s1,n,fmt,x1) sprintf(s1,fmt,x1)
   1643 #    define png_snprintf2(s1,n,fmt,x1,x2) sprintf(s1,fmt,x1,x2)
   1644 #    define png_snprintf6(s1,n,fmt,x1,x2,x3,x4,x5,x6) \
   1645         sprintf(s1,fmt,x1,x2,x3,x4,x5,x6)
   1646 #  endif
   1647 #  define png_strlen  strlen
   1648 #  define png_memcmp  memcmp      /* SJT: added */
   1649 #  define png_memcpy  memcpy
   1650 #  define png_memset  memset
   1651 #endif
   1652 /* End of memory model independent support */
   1653 
   1654 /* Just a little check that someone hasn't tried to define something
   1655  * contradictory.
   1656  */
   1657 #if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K)
   1658 #  undef PNG_ZBUF_SIZE
   1659 #  define PNG_ZBUF_SIZE 65536L
   1660 #endif
   1661 
   1662 /* Added at libpng-1.2.8 */
   1663 #endif /* PNG_VERSION_INFO_ONLY */
   1664 
   1665 #endif /* PNGCONF_H */
   1666