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      1 
      2 /* pngconf.h - machine configurable file for libpng
      3  *
      4  * libpng version 1.2.46 - July 9, 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 #ifndef PNG_NO_INDEX_SUPPORTED
     26 #  define PNG_INDEX_SUPPORTED
     27 #endif
     28 
     29 /*
     30  * PNG_USER_CONFIG has to be defined on the compiler command line. This
     31  * includes the resource compiler for Windows DLL configurations.
     32  */
     33 #ifdef PNG_USER_CONFIG
     34 #  ifndef PNG_USER_PRIVATEBUILD
     35 #    define PNG_USER_PRIVATEBUILD
     36 #  endif
     37 #include "pngusr.h"
     38 #endif
     39 
     40 /* PNG_CONFIGURE_LIBPNG is set by the "configure" script. */
     41 #ifdef PNG_CONFIGURE_LIBPNG
     42 #ifdef HAVE_CONFIG_H
     43 #include "config.h"
     44 #endif
     45 #endif
     46 
     47 /*
     48  * Added at libpng-1.2.8
     49  *
     50  * If you create a private DLL you need to define in "pngusr.h" the followings:
     51  * #define PNG_USER_PRIVATEBUILD <Describes by whom and why this version of
     52  *        the DLL was built>
     53  *  e.g. #define PNG_USER_PRIVATEBUILD "Build by MyCompany for xyz reasons."
     54  * #define PNG_USER_DLLFNAME_POSTFIX <two-letter postfix that serve to
     55  *        distinguish your DLL from those of the official release. These
     56  *        correspond to the trailing letters that come after the version
     57  *        number and must match your private DLL name>
     58  *  e.g. // private DLL "libpng13gx.dll"
     59  *       #define PNG_USER_DLLFNAME_POSTFIX "gx"
     60  *
     61  * The following macros are also at your disposal if you want to complete the
     62  * DLL VERSIONINFO structure.
     63  * - PNG_USER_VERSIONINFO_COMMENTS
     64  * - PNG_USER_VERSIONINFO_COMPANYNAME
     65  * - PNG_USER_VERSIONINFO_LEGALTRADEMARKS
     66  */
     67 
     68 #ifdef __STDC__
     69 #ifdef SPECIALBUILD
     70 #  pragma message("PNG_LIBPNG_SPECIALBUILD (and deprecated SPECIALBUILD)\
     71  are now LIBPNG reserved macros. Use PNG_USER_PRIVATEBUILD instead.")
     72 #endif
     73 
     74 #ifdef PRIVATEBUILD
     75 # pragma message("PRIVATEBUILD is deprecated.\
     76  Use PNG_USER_PRIVATEBUILD instead.")
     77 # define PNG_USER_PRIVATEBUILD PRIVATEBUILD
     78 #endif
     79 #endif /* __STDC__ */
     80 
     81 #ifndef PNG_VERSION_INFO_ONLY
     82 
     83 /* End of material added to libpng-1.2.8 */
     84 
     85 /* Added at libpng-1.2.19, removed at libpng-1.2.20 because it caused trouble
     86    Restored at libpng-1.2.21 */
     87 #if !defined(PNG_NO_WARN_UNINITIALIZED_ROW) && \
     88     !defined(PNG_WARN_UNINITIALIZED_ROW)
     89 #  define PNG_WARN_UNINITIALIZED_ROW 1
     90 #endif
     91 /* End of material added at libpng-1.2.19/1.2.21 */
     92 
     93 /* This is the size of the compression buffer, and thus the size of
     94  * an IDAT chunk.  Make this whatever size you feel is best for your
     95  * machine.  One of these will be allocated per png_struct.  When this
     96  * is full, it writes the data to the disk, and does some other
     97  * calculations.  Making this an extremely small size will slow
     98  * the library down, but you may want to experiment to determine
     99  * where it becomes significant, if you are concerned with memory
    100  * usage.  Note that zlib allocates at least 32Kb also.  For readers,
    101  * this describes the size of the buffer available to read the data in.
    102  * Unless this gets smaller than the size of a row (compressed),
    103  * it should not make much difference how big this is.
    104  */
    105 
    106 #ifndef PNG_ZBUF_SIZE
    107 #  define PNG_ZBUF_SIZE 8192
    108 #endif
    109 
    110 /* Enable if you want a write-only libpng */
    111 
    112 #ifndef PNG_NO_READ_SUPPORTED
    113 #  define PNG_READ_SUPPORTED
    114 #endif
    115 
    116 /* Enable if you want a read-only libpng */
    117 
    118 #ifndef PNG_NO_WRITE_SUPPORTED
    119 #  define PNG_WRITE_SUPPORTED
    120 #endif
    121 
    122 /* Enabled in 1.2.41. */
    123 #ifdef PNG_ALLOW_BENIGN_ERRORS
    124 #  define png_benign_error png_warning
    125 #  define png_chunk_benign_error png_chunk_warning
    126 #else
    127 #  ifndef PNG_BENIGN_ERRORS_SUPPORTED
    128 #    define png_benign_error png_error
    129 #    define png_chunk_benign_error png_chunk_error
    130 #  endif
    131 #endif
    132 
    133 /* Added in libpng-1.2.41 */
    134 #if !defined(PNG_NO_WARNINGS) && !defined(PNG_WARNINGS_SUPPORTED)
    135 #  define PNG_WARNINGS_SUPPORTED
    136 #endif
    137 
    138 #if !defined(PNG_NO_ERROR_TEXT) && !defined(PNG_ERROR_TEXT_SUPPORTED)
    139 #  define PNG_ERROR_TEXT_SUPPORTED
    140 #endif
    141 
    142 #if !defined(PNG_NO_CHECK_cHRM) && !defined(PNG_CHECK_cHRM_SUPPORTED)
    143 #  define PNG_CHECK_cHRM_SUPPORTED
    144 #endif
    145 
    146 /* Enabled by default in 1.2.0.  You can disable this if you don't need to
    147  * support PNGs that are embedded in MNG datastreams
    148  */
    149 #if !defined(PNG_1_0_X) && !defined(PNG_NO_MNG_FEATURES)
    150 #  ifndef PNG_MNG_FEATURES_SUPPORTED
    151 #    define PNG_MNG_FEATURES_SUPPORTED
    152 #  endif
    153 #endif
    154 
    155 #ifndef PNG_NO_FLOATING_POINT_SUPPORTED
    156 #  ifndef PNG_FLOATING_POINT_SUPPORTED
    157 #    define PNG_FLOATING_POINT_SUPPORTED
    158 #  endif
    159 #endif
    160 
    161 /* If you are running on a machine where you cannot allocate more
    162  * than 64K of memory at once, uncomment this.  While libpng will not
    163  * normally need that much memory in a chunk (unless you load up a very
    164  * large file), zlib needs to know how big of a chunk it can use, and
    165  * libpng thus makes sure to check any memory allocation to verify it
    166  * will fit into memory.
    167 #define PNG_MAX_MALLOC_64K
    168  */
    169 #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
    170 #  define PNG_MAX_MALLOC_64K
    171 #endif
    172 
    173 /* Special munging to support doing things the 'cygwin' way:
    174  * 'Normal' png-on-win32 defines/defaults:
    175  *   PNG_BUILD_DLL -- building dll
    176  *   PNG_USE_DLL   -- building an application, linking to dll
    177  *   (no define)   -- building static library, or building an
    178  *                    application and linking to the static lib
    179  * 'Cygwin' defines/defaults:
    180  *   PNG_BUILD_DLL -- (ignored) building the dll
    181  *   (no define)   -- (ignored) building an application, linking to the dll
    182  *   PNG_STATIC    -- (ignored) building the static lib, or building an
    183  *                    application that links to the static lib.
    184  *   ALL_STATIC    -- (ignored) building various static libs, or building an
    185  *                    application that links to the static libs.
    186  * Thus,
    187  * a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and
    188  * this bit of #ifdefs will define the 'correct' config variables based on
    189  * that. If a cygwin user *wants* to define 'PNG_USE_DLL' that's okay, but
    190  * unnecessary.
    191  *
    192  * Also, the precedence order is:
    193  *   ALL_STATIC (since we can't #undef something outside our namespace)
    194  *   PNG_BUILD_DLL
    195  *   PNG_STATIC
    196  *   (nothing) == PNG_USE_DLL
    197  *
    198  * CYGWIN (2002-01-20): The preceding is now obsolete. With the advent
    199  *   of auto-import in binutils, we no longer need to worry about
    200  *   __declspec(dllexport) / __declspec(dllimport) and friends.  Therefore,
    201  *   we don't need to worry about PNG_STATIC or ALL_STATIC when it comes
    202  *   to __declspec() stuff.  However, we DO need to worry about
    203  *   PNG_BUILD_DLL and PNG_STATIC because those change some defaults
    204  *   such as CONSOLE_IO and whether GLOBAL_ARRAYS are allowed.
    205  */
    206 #ifdef __CYGWIN__
    207 #  ifdef ALL_STATIC
    208 #    ifdef PNG_BUILD_DLL
    209 #      undef PNG_BUILD_DLL
    210 #    endif
    211 #    ifdef PNG_USE_DLL
    212 #      undef PNG_USE_DLL
    213 #    endif
    214 #    ifdef PNG_DLL
    215 #      undef PNG_DLL
    216 #    endif
    217 #    ifndef PNG_STATIC
    218 #      define PNG_STATIC
    219 #    endif
    220 #  else
    221 #    ifdef PNG_BUILD_DLL
    222 #      ifdef PNG_STATIC
    223 #        undef PNG_STATIC
    224 #      endif
    225 #      ifdef PNG_USE_DLL
    226 #        undef PNG_USE_DLL
    227 #      endif
    228 #      ifndef PNG_DLL
    229 #        define PNG_DLL
    230 #      endif
    231 #    else
    232 #      ifdef PNG_STATIC
    233 #        ifdef PNG_USE_DLL
    234 #          undef PNG_USE_DLL
    235 #        endif
    236 #        ifdef PNG_DLL
    237 #          undef PNG_DLL
    238 #        endif
    239 #      else
    240 #        ifndef PNG_USE_DLL
    241 #          define PNG_USE_DLL
    242 #        endif
    243 #        ifndef PNG_DLL
    244 #          define PNG_DLL
    245 #        endif
    246 #      endif
    247 #    endif
    248 #  endif
    249 #endif
    250 
    251 /* This protects us against compilers that run on a windowing system
    252  * and thus don't have or would rather us not use the stdio types:
    253  * stdin, stdout, and stderr.  The only one currently used is stderr
    254  * in png_error() and png_warning().  #defining PNG_NO_CONSOLE_IO will
    255  * prevent these from being compiled and used. #defining PNG_NO_STDIO
    256  * will also prevent these, plus will prevent the entire set of stdio
    257  * macros and functions (FILE *, printf, etc.) from being compiled and used,
    258  * unless (PNG_DEBUG > 0) has been #defined.
    259  *
    260  * #define PNG_NO_CONSOLE_IO
    261  * #define PNG_NO_STDIO
    262  */
    263 
    264 #if !defined(PNG_NO_STDIO) && !defined(PNG_STDIO_SUPPORTED)
    265 #  define PNG_STDIO_SUPPORTED
    266 #endif
    267 
    268 #ifdef _WIN32_WCE
    269 #  include <windows.h>
    270    /* Console I/O functions are not supported on WindowsCE */
    271 #  define PNG_NO_CONSOLE_IO
    272    /* abort() may not be supported on some/all Windows CE platforms */
    273 #  define PNG_ABORT() exit(-1)
    274 #  ifdef PNG_DEBUG
    275 #    undef PNG_DEBUG
    276 #  endif
    277 #endif
    278 
    279 #ifdef PNG_BUILD_DLL
    280 #  ifndef PNG_CONSOLE_IO_SUPPORTED
    281 #    ifndef PNG_NO_CONSOLE_IO
    282 #      define PNG_NO_CONSOLE_IO
    283 #    endif
    284 #  endif
    285 #endif
    286 
    287 #  ifdef PNG_NO_STDIO
    288 #    ifndef PNG_NO_CONSOLE_IO
    289 #      define PNG_NO_CONSOLE_IO
    290 #    endif
    291 #    ifdef PNG_DEBUG
    292 #      if (PNG_DEBUG > 0)
    293 #        include <stdio.h>
    294 #      endif
    295 #    endif
    296 #  else
    297 #    ifndef _WIN32_WCE
    298 /* "stdio.h" functions are not supported on WindowsCE */
    299 #      include <stdio.h>
    300 #    endif
    301 #  endif
    302 
    303 #if !(defined PNG_NO_CONSOLE_IO) && !defined(PNG_CONSOLE_IO_SUPPORTED)
    304 #  define PNG_CONSOLE_IO_SUPPORTED
    305 #endif
    306 
    307 /* This macro protects us against machines that don't have function
    308  * prototypes (ie K&R style headers).  If your compiler does not handle
    309  * function prototypes, define this macro and use the included ansi2knr.
    310  * I've always been able to use _NO_PROTO as the indicator, but you may
    311  * need to drag the empty declaration out in front of here, or change the
    312  * ifdef to suit your own needs.
    313  */
    314 #ifndef PNGARG
    315 
    316 #ifdef OF /* zlib prototype munger */
    317 #  define PNGARG(arglist) OF(arglist)
    318 #else
    319 
    320 #ifdef _NO_PROTO
    321 #  define PNGARG(arglist) ()
    322 #  ifndef PNG_TYPECAST_NULL
    323 #     define PNG_TYPECAST_NULL
    324 #  endif
    325 #else
    326 #  define PNGARG(arglist) arglist
    327 #endif /* _NO_PROTO */
    328 
    329 
    330 #endif /* OF */
    331 
    332 #endif /* PNGARG */
    333 
    334 /* Try to determine if we are compiling on a Mac.  Note that testing for
    335  * just __MWERKS__ is not good enough, because the Codewarrior is now used
    336  * on non-Mac platforms.
    337  */
    338 #ifndef MACOS
    339 #  if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
    340       defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC)
    341 #    define MACOS
    342 #  endif
    343 #endif
    344 
    345 /* enough people need this for various reasons to include it here */
    346 #if !defined(MACOS) && !defined(RISCOS) && !defined(_WIN32_WCE)
    347 #  include <sys/types.h>
    348 #endif
    349 
    350 #if !defined(PNG_SETJMP_NOT_SUPPORTED) && !defined(PNG_NO_SETJMP_SUPPORTED)
    351 #  define PNG_SETJMP_SUPPORTED
    352 #endif
    353 
    354 #ifdef PNG_SETJMP_SUPPORTED
    355 /* This is an attempt to force a single setjmp behaviour on Linux.  If
    356  * the X config stuff didn't define _BSD_SOURCE we wouldn't need this.
    357  *
    358  * You can bypass this test if you know that your application uses exactly
    359  * the same setjmp.h that was included when libpng was built.  Only define
    360  * PNG_SKIP_SETJMP_CHECK while building your application, prior to the
    361  * application's '#include "png.h"'. Don't define PNG_SKIP_SETJMP_CHECK
    362  * while building a separate libpng library for general use.
    363  */
    364 
    365 #  ifndef PNG_SKIP_SETJMP_CHECK
    366 #    ifdef __linux__
    367 #      ifdef _BSD_SOURCE
    368 #        define PNG_SAVE_BSD_SOURCE
    369 #        undef _BSD_SOURCE
    370 #      endif
    371 #      ifdef _SETJMP_H
    372        /* If you encounter a compiler error here, see the explanation
    373         * near the end of INSTALL.
    374         */
    375            __pngconf.h__ in libpng already includes setjmp.h;
    376            __dont__ include it again.;
    377 #      endif
    378 #    endif /* __linux__ */
    379 #  endif /* PNG_SKIP_SETJMP_CHECK */
    380 
    381    /* include setjmp.h for error handling */
    382 #  include <setjmp.h>
    383 
    384 #  ifdef __linux__
    385 #    ifdef PNG_SAVE_BSD_SOURCE
    386 #      ifndef _BSD_SOURCE
    387 #        define _BSD_SOURCE
    388 #      endif
    389 #      undef PNG_SAVE_BSD_SOURCE
    390 #    endif
    391 #  endif /* __linux__ */
    392 #endif /* PNG_SETJMP_SUPPORTED */
    393 
    394 #ifdef BSD
    395 #  include <strings.h>
    396 #else
    397 #  include <string.h>
    398 #endif
    399 
    400 /* Other defines for things like memory and the like can go here.  */
    401 #ifdef PNG_INTERNAL
    402 
    403 #include <stdlib.h>
    404 
    405 /* The functions exported by PNG_EXTERN are PNG_INTERNAL functions, which
    406  * aren't usually used outside the library (as far as I know), so it is
    407  * debatable if they should be exported at all.  In the future, when it is
    408  * possible to have run-time registry of chunk-handling functions, some of
    409  * these will be made available again.
    410 #define PNG_EXTERN extern
    411  */
    412 #define PNG_EXTERN
    413 
    414 /* Other defines specific to compilers can go here.  Try to keep
    415  * them inside an appropriate ifdef/endif pair for portability.
    416  */
    417 
    418 #ifdef PNG_FLOATING_POINT_SUPPORTED
    419 #  ifdef MACOS
    420      /* We need to check that <math.h> hasn't already been included earlier
    421       * as it seems it doesn't agree with <fp.h>, yet we should really use
    422       * <fp.h> if possible.
    423       */
    424 #    if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__)
    425 #      include <fp.h>
    426 #    endif
    427 #  else
    428 #    include <math.h>
    429 #  endif
    430 #  if defined(_AMIGA) && defined(__SASC) && defined(_M68881)
    431      /* Amiga SAS/C: We must include builtin FPU functions when compiling using
    432       * MATH=68881
    433       */
    434 #    include <m68881.h>
    435 #  endif
    436 #endif
    437 
    438 /* Codewarrior on NT has linking problems without this. */
    439 #if (defined(__MWERKS__) && defined(WIN32)) || defined(__STDC__)
    440 #  define PNG_ALWAYS_EXTERN
    441 #endif
    442 
    443 /* This provides the non-ANSI (far) memory allocation routines. */
    444 #if defined(__TURBOC__) && defined(__MSDOS__)
    445 #  include <mem.h>
    446 #  include <alloc.h>
    447 #endif
    448 
    449 /* I have no idea why is this necessary... */
    450 #if defined(_MSC_VER) && (defined(WIN32) || defined(_Windows) || \
    451     defined(_WINDOWS) || defined(_WIN32) || defined(__WIN32__))
    452 #  include <malloc.h>
    453 #endif
    454 
    455 /* This controls how fine the dithering gets.  As this allocates
    456  * a largish chunk of memory (32K), those who are not as concerned
    457  * with dithering quality can decrease some or all of these.
    458  */
    459 #ifndef PNG_DITHER_RED_BITS
    460 #  define PNG_DITHER_RED_BITS 5
    461 #endif
    462 #ifndef PNG_DITHER_GREEN_BITS
    463 #  define PNG_DITHER_GREEN_BITS 5
    464 #endif
    465 #ifndef PNG_DITHER_BLUE_BITS
    466 #  define PNG_DITHER_BLUE_BITS 5
    467 #endif
    468 
    469 /* This controls how fine the gamma correction becomes when you
    470  * are only interested in 8 bits anyway.  Increasing this value
    471  * results in more memory being used, and more pow() functions
    472  * being called to fill in the gamma tables.  Don't set this value
    473  * less then 8, and even that may not work (I haven't tested it).
    474  */
    475 
    476 #ifndef PNG_MAX_GAMMA_8
    477 #  define PNG_MAX_GAMMA_8 11
    478 #endif
    479 
    480 /* This controls how much a difference in gamma we can tolerate before
    481  * we actually start doing gamma conversion.
    482  */
    483 #ifndef PNG_GAMMA_THRESHOLD
    484 #  define PNG_GAMMA_THRESHOLD 0.05
    485 #endif
    486 
    487 #endif /* PNG_INTERNAL */
    488 
    489 /* The following uses const char * instead of char * for error
    490  * and warning message functions, so some compilers won't complain.
    491  * If you do not want to use const, define PNG_NO_CONST here.
    492  */
    493 
    494 #ifndef PNG_NO_CONST
    495 #  define PNG_CONST const
    496 #else
    497 #  define PNG_CONST
    498 #endif
    499 
    500 /* The following defines give you the ability to remove code from the
    501  * library that you will not be using.  I wish I could figure out how to
    502  * automate this, but I can't do that without making it seriously hard
    503  * on the users.  So if you are not using an ability, change the #define
    504  * to and #undef, and that part of the library will not be compiled.  If
    505  * your linker can't find a function, you may want to make sure the
    506  * ability is defined here.  Some of these depend upon some others being
    507  * defined.  I haven't figured out all the interactions here, so you may
    508  * have to experiment awhile to get everything to compile.  If you are
    509  * creating or using a shared library, you probably shouldn't touch this,
    510  * as it will affect the size of the structures, and this will cause bad
    511  * things to happen if the library and/or application ever change.
    512  */
    513 
    514 /* Any features you will not be using can be undef'ed here */
    515 
    516 /* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user
    517  * to turn it off with "*TRANSFORMS_NOT_SUPPORTED" or *PNG_NO_*_TRANSFORMS
    518  * on the compile line, then pick and choose which ones to define without
    519  * having to edit this file. It is safe to use the *TRANSFORMS_NOT_SUPPORTED
    520  * if you only want to have a png-compliant reader/writer but don't need
    521  * any of the extra transformations.  This saves about 80 kbytes in a
    522  * typical installation of the library. (PNG_NO_* form added in version
    523  * 1.0.1c, for consistency)
    524  */
    525 
    526 /* The size of the png_text structure changed in libpng-1.0.6 when
    527  * iTXt support was added.  iTXt support was turned off by default through
    528  * libpng-1.2.x, to support old apps that malloc the png_text structure
    529  * instead of calling png_set_text() and letting libpng malloc it.  It
    530  * will be turned on by default in libpng-1.4.0.
    531  */
    532 
    533 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
    534 #  ifndef PNG_NO_iTXt_SUPPORTED
    535 #    define PNG_NO_iTXt_SUPPORTED
    536 #  endif
    537 #  ifndef PNG_NO_READ_iTXt
    538 #    define PNG_NO_READ_iTXt
    539 #  endif
    540 #  ifndef PNG_NO_WRITE_iTXt
    541 #    define PNG_NO_WRITE_iTXt
    542 #  endif
    543 #endif
    544 
    545 #if !defined(PNG_NO_iTXt_SUPPORTED)
    546 #  if !defined(PNG_READ_iTXt_SUPPORTED) && !defined(PNG_NO_READ_iTXt)
    547 #    define PNG_READ_iTXt
    548 #  endif
    549 #  if !defined(PNG_WRITE_iTXt_SUPPORTED) && !defined(PNG_NO_WRITE_iTXt)
    550 #    define PNG_WRITE_iTXt
    551 #  endif
    552 #endif
    553 
    554 /* The following support, added after version 1.0.0, can be turned off here en
    555  * masse by defining PNG_LEGACY_SUPPORTED in case you need binary compatibility
    556  * with old applications that require the length of png_struct and png_info
    557  * to remain unchanged.
    558  */
    559 
    560 #ifdef PNG_LEGACY_SUPPORTED
    561 #  define PNG_NO_FREE_ME
    562 #  define PNG_NO_READ_UNKNOWN_CHUNKS
    563 #  define PNG_NO_WRITE_UNKNOWN_CHUNKS
    564 #  define PNG_NO_HANDLE_AS_UNKNOWN
    565 #  define PNG_NO_READ_USER_CHUNKS
    566 #  define PNG_NO_READ_iCCP
    567 #  define PNG_NO_WRITE_iCCP
    568 #  define PNG_NO_READ_iTXt
    569 #  define PNG_NO_WRITE_iTXt
    570 #  define PNG_NO_READ_sCAL
    571 #  define PNG_NO_WRITE_sCAL
    572 #  define PNG_NO_READ_sPLT
    573 #  define PNG_NO_WRITE_sPLT
    574 #  define PNG_NO_INFO_IMAGE
    575 #  define PNG_NO_READ_RGB_TO_GRAY
    576 #  define PNG_NO_READ_USER_TRANSFORM
    577 #  define PNG_NO_WRITE_USER_TRANSFORM
    578 #  define PNG_NO_USER_MEM
    579 #  define PNG_NO_READ_EMPTY_PLTE
    580 #  define PNG_NO_MNG_FEATURES
    581 #  define PNG_NO_FIXED_POINT_SUPPORTED
    582 #endif
    583 
    584 /* Ignore attempt to turn off both floating and fixed point support */
    585 #if !defined(PNG_FLOATING_POINT_SUPPORTED) || \
    586     !defined(PNG_NO_FIXED_POINT_SUPPORTED)
    587 #  define PNG_FIXED_POINT_SUPPORTED
    588 #endif
    589 
    590 #ifndef PNG_NO_FREE_ME
    591 #  define PNG_FREE_ME_SUPPORTED
    592 #endif
    593 
    594 #ifdef PNG_READ_SUPPORTED
    595 
    596 #if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \
    597       !defined(PNG_NO_READ_TRANSFORMS)
    598 #  define PNG_READ_TRANSFORMS_SUPPORTED
    599 #endif
    600 
    601 #ifdef PNG_READ_TRANSFORMS_SUPPORTED
    602 #  ifndef PNG_NO_READ_EXPAND
    603 #    define PNG_READ_EXPAND_SUPPORTED
    604 #  endif
    605 #  ifndef PNG_NO_READ_SHIFT
    606 #    define PNG_READ_SHIFT_SUPPORTED
    607 #  endif
    608 #  ifndef PNG_NO_READ_PACK
    609 #    define PNG_READ_PACK_SUPPORTED
    610 #  endif
    611 #  ifndef PNG_NO_READ_BGR
    612 #    define PNG_READ_BGR_SUPPORTED
    613 #  endif
    614 #  ifndef PNG_NO_READ_SWAP
    615 #    define PNG_READ_SWAP_SUPPORTED
    616 #  endif
    617 #  ifndef PNG_NO_READ_PACKSWAP
    618 #    define PNG_READ_PACKSWAP_SUPPORTED
    619 #  endif
    620 #  ifndef PNG_NO_READ_INVERT
    621 #    define PNG_READ_INVERT_SUPPORTED
    622 #  endif
    623 #  ifndef PNG_NO_READ_DITHER
    624 #    define PNG_READ_DITHER_SUPPORTED
    625 #  endif
    626 #  ifndef PNG_NO_READ_BACKGROUND
    627 #    define PNG_READ_BACKGROUND_SUPPORTED
    628 #  endif
    629 #  ifndef PNG_NO_READ_16_TO_8
    630 #    define PNG_READ_16_TO_8_SUPPORTED
    631 #  endif
    632 #  ifndef PNG_NO_READ_FILLER
    633 #    define PNG_READ_FILLER_SUPPORTED
    634 #  endif
    635 #  ifndef PNG_NO_READ_GAMMA
    636 #    define PNG_READ_GAMMA_SUPPORTED
    637 #  endif
    638 #  ifndef PNG_NO_READ_GRAY_TO_RGB
    639 #    define PNG_READ_GRAY_TO_RGB_SUPPORTED
    640 #  endif
    641 #  ifndef PNG_NO_READ_SWAP_ALPHA
    642 #    define PNG_READ_SWAP_ALPHA_SUPPORTED
    643 #  endif
    644 #  ifndef PNG_NO_READ_INVERT_ALPHA
    645 #    define PNG_READ_INVERT_ALPHA_SUPPORTED
    646 #  endif
    647 #  ifndef PNG_NO_READ_STRIP_ALPHA
    648 #    define PNG_READ_STRIP_ALPHA_SUPPORTED
    649 #  endif
    650 #  ifndef PNG_NO_READ_USER_TRANSFORM
    651 #    define PNG_READ_USER_TRANSFORM_SUPPORTED
    652 #  endif
    653 #  ifndef PNG_NO_READ_RGB_TO_GRAY
    654 #    define PNG_READ_RGB_TO_GRAY_SUPPORTED
    655 #  endif
    656 #endif /* PNG_READ_TRANSFORMS_SUPPORTED */
    657 
    658 /* PNG_PROGRESSIVE_READ_NOT_SUPPORTED is deprecated. */
    659 #if !defined(PNG_NO_PROGRESSIVE_READ) && \
    660  !defined(PNG_PROGRESSIVE_READ_NOT_SUPPORTED)  /* if you don't do progressive */
    661 #  define PNG_PROGRESSIVE_READ_SUPPORTED     /* reading.  This is not talking */
    662 #endif                               /* about interlacing capability!  You'll */
    663             /* still have interlacing unless you change the following define: */
    664 #define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */
    665 
    666 /* PNG_NO_SEQUENTIAL_READ_SUPPORTED is deprecated. */
    667 #if !defined(PNG_NO_SEQUENTIAL_READ) && \
    668     !defined(PNG_SEQUENTIAL_READ_SUPPORTED) && \
    669     !defined(PNG_NO_SEQUENTIAL_READ_SUPPORTED)
    670 #  define PNG_SEQUENTIAL_READ_SUPPORTED
    671 #endif
    672 
    673 #define PNG_READ_INTERLACING_SUPPORTED /* required in PNG-compliant decoders */
    674 
    675 #ifndef PNG_NO_READ_COMPOSITE_NODIV
    676 #  ifndef PNG_NO_READ_COMPOSITED_NODIV  /* libpng-1.0.x misspelling */
    677 #    define PNG_READ_COMPOSITE_NODIV_SUPPORTED  /* well tested on Intel, SGI */
    678 #  endif
    679 #endif
    680 
    681 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
    682 /* Deprecated, will be removed from version 2.0.0.
    683    Use PNG_MNG_FEATURES_SUPPORTED instead. */
    684 #ifndef PNG_NO_READ_EMPTY_PLTE
    685 #  define PNG_READ_EMPTY_PLTE_SUPPORTED
    686 #endif
    687 #endif
    688 
    689 #endif /* PNG_READ_SUPPORTED */
    690 
    691 #ifdef PNG_WRITE_SUPPORTED
    692 
    693 # if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \
    694     !defined(PNG_NO_WRITE_TRANSFORMS)
    695 #  define PNG_WRITE_TRANSFORMS_SUPPORTED
    696 #endif
    697 
    698 #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
    699 #  ifndef PNG_NO_WRITE_SHIFT
    700 #    define PNG_WRITE_SHIFT_SUPPORTED
    701 #  endif
    702 #  ifndef PNG_NO_WRITE_PACK
    703 #    define PNG_WRITE_PACK_SUPPORTED
    704 #  endif
    705 #  ifndef PNG_NO_WRITE_BGR
    706 #    define PNG_WRITE_BGR_SUPPORTED
    707 #  endif
    708 #  ifndef PNG_NO_WRITE_SWAP
    709 #    define PNG_WRITE_SWAP_SUPPORTED
    710 #  endif
    711 #  ifndef PNG_NO_WRITE_PACKSWAP
    712 #    define PNG_WRITE_PACKSWAP_SUPPORTED
    713 #  endif
    714 #  ifndef PNG_NO_WRITE_INVERT
    715 #    define PNG_WRITE_INVERT_SUPPORTED
    716 #  endif
    717 #  ifndef PNG_NO_WRITE_FILLER
    718 #    define PNG_WRITE_FILLER_SUPPORTED   /* same as WRITE_STRIP_ALPHA */
    719 #  endif
    720 #  ifndef PNG_NO_WRITE_SWAP_ALPHA
    721 #    define PNG_WRITE_SWAP_ALPHA_SUPPORTED
    722 #  endif
    723 #ifndef PNG_1_0_X
    724 #  ifndef PNG_NO_WRITE_INVERT_ALPHA
    725 #    define PNG_WRITE_INVERT_ALPHA_SUPPORTED
    726 #  endif
    727 #endif
    728 #  ifndef PNG_NO_WRITE_USER_TRANSFORM
    729 #    define PNG_WRITE_USER_TRANSFORM_SUPPORTED
    730 #  endif
    731 #endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */
    732 
    733 #if !defined(PNG_NO_WRITE_INTERLACING_SUPPORTED) && \
    734     !defined(PNG_WRITE_INTERLACING_SUPPORTED)
    735 #define PNG_WRITE_INTERLACING_SUPPORTED  /* not required for PNG-compliant
    736                                             encoders, but can cause trouble
    737                                             if left undefined */
    738 #endif
    739 
    740 #if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \
    741     !defined(PNG_WRITE_WEIGHTED_FILTER) && \
    742      defined(PNG_FLOATING_POINT_SUPPORTED)
    743 #  define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
    744 #endif
    745 
    746 #ifndef PNG_NO_WRITE_FLUSH
    747 #  define PNG_WRITE_FLUSH_SUPPORTED
    748 #endif
    749 
    750 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
    751 /* Deprecated, see PNG_MNG_FEATURES_SUPPORTED, above */
    752 #ifndef PNG_NO_WRITE_EMPTY_PLTE
    753 #  define PNG_WRITE_EMPTY_PLTE_SUPPORTED
    754 #endif
    755 #endif
    756 
    757 #endif /* PNG_WRITE_SUPPORTED */
    758 
    759 #ifndef PNG_1_0_X
    760 #  ifndef PNG_NO_ERROR_NUMBERS
    761 #    define PNG_ERROR_NUMBERS_SUPPORTED
    762 #  endif
    763 #endif /* PNG_1_0_X */
    764 
    765 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
    766     defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
    767 #  ifndef PNG_NO_USER_TRANSFORM_PTR
    768 #    define PNG_USER_TRANSFORM_PTR_SUPPORTED
    769 #  endif
    770 #endif
    771 
    772 #ifndef PNG_NO_STDIO
    773 #  define PNG_TIME_RFC1123_SUPPORTED
    774 #endif
    775 
    776 /* This adds extra functions in pngget.c for accessing data from the
    777  * info pointer (added in version 0.99)
    778  * png_get_image_width()
    779  * png_get_image_height()
    780  * png_get_bit_depth()
    781  * png_get_color_type()
    782  * png_get_compression_type()
    783  * png_get_filter_type()
    784  * png_get_interlace_type()
    785  * png_get_pixel_aspect_ratio()
    786  * png_get_pixels_per_meter()
    787  * png_get_x_offset_pixels()
    788  * png_get_y_offset_pixels()
    789  * png_get_x_offset_microns()
    790  * png_get_y_offset_microns()
    791  */
    792 #if !defined(PNG_NO_EASY_ACCESS) && !defined(PNG_EASY_ACCESS_SUPPORTED)
    793 #  define PNG_EASY_ACCESS_SUPPORTED
    794 #endif
    795 
    796 /* PNG_ASSEMBLER_CODE was enabled by default in version 1.2.0
    797  * and removed from version 1.2.20.  The following will be removed
    798  * from libpng-1.4.0
    799 */
    800 
    801 #if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_OPTIMIZED_CODE)
    802 #  ifndef PNG_OPTIMIZED_CODE_SUPPORTED
    803 #    define PNG_OPTIMIZED_CODE_SUPPORTED
    804 #  endif
    805 #endif
    806 
    807 #if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_ASSEMBLER_CODE)
    808 #  ifndef PNG_ASSEMBLER_CODE_SUPPORTED
    809 #    define PNG_ASSEMBLER_CODE_SUPPORTED
    810 #  endif
    811 
    812 #  if defined(__GNUC__) && defined(__x86_64__) && (__GNUC__ < 4)
    813      /* work around 64-bit gcc compiler bugs in gcc-3.x */
    814 #    if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
    815 #      define PNG_NO_MMX_CODE
    816 #    endif
    817 #  endif
    818 
    819 #  ifdef __APPLE__
    820 #    if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
    821 #      define PNG_NO_MMX_CODE
    822 #    endif
    823 #  endif
    824 
    825 #  if (defined(__MWERKS__) && ((__MWERKS__ < 0x0900) || macintosh))
    826 #    if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
    827 #      define PNG_NO_MMX_CODE
    828 #    endif
    829 #  endif
    830 
    831 #  if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
    832 #    define PNG_MMX_CODE_SUPPORTED
    833 #  endif
    834 
    835 #endif
    836 /* end of obsolete code to be removed from libpng-1.4.0 */
    837 
    838 /* Added at libpng-1.2.0 */
    839 #ifndef PNG_1_0_X
    840 #if !defined(PNG_NO_USER_MEM) && !defined(PNG_USER_MEM_SUPPORTED)
    841 #  define PNG_USER_MEM_SUPPORTED
    842 #endif
    843 #endif /* PNG_1_0_X */
    844 
    845 /* Added at libpng-1.2.6 */
    846 #ifndef PNG_1_0_X
    847 #  ifndef PNG_SET_USER_LIMITS_SUPPORTED
    848 #    ifndef PNG_NO_SET_USER_LIMITS
    849 #      define PNG_SET_USER_LIMITS_SUPPORTED
    850 #    endif
    851 #  endif
    852 #endif /* PNG_1_0_X */
    853 
    854 /* Added at libpng-1.0.53 and 1.2.43 */
    855 #ifndef PNG_USER_LIMITS_SUPPORTED
    856 #  ifndef PNG_NO_USER_LIMITS
    857 #    define PNG_USER_LIMITS_SUPPORTED
    858 #  endif
    859 #endif
    860 
    861 /* Added at libpng-1.0.16 and 1.2.6.  To accept all valid PNGS no matter
    862  * how large, set these limits to 0x7fffffffL
    863  */
    864 #ifndef PNG_USER_WIDTH_MAX
    865 #  define PNG_USER_WIDTH_MAX 1000000L
    866 #endif
    867 #ifndef PNG_USER_HEIGHT_MAX
    868 #  define PNG_USER_HEIGHT_MAX 1000000L
    869 #endif
    870 
    871 /* Added at libpng-1.2.43.  To accept all valid PNGs no matter
    872  * how large, set these two limits to 0.
    873  */
    874 #ifndef PNG_USER_CHUNK_CACHE_MAX
    875 #  define PNG_USER_CHUNK_CACHE_MAX 0
    876 #endif
    877 
    878 /* Added at libpng-1.2.43 */
    879 #ifndef PNG_USER_CHUNK_MALLOC_MAX
    880 #  define PNG_USER_CHUNK_MALLOC_MAX 0
    881 #endif
    882 
    883 #ifndef PNG_LITERAL_SHARP
    884 #  define PNG_LITERAL_SHARP 0x23
    885 #endif
    886 #ifndef PNG_LITERAL_LEFT_SQUARE_BRACKET
    887 #  define PNG_LITERAL_LEFT_SQUARE_BRACKET 0x5b
    888 #endif
    889 #ifndef PNG_LITERAL_RIGHT_SQUARE_BRACKET
    890 #  define PNG_LITERAL_RIGHT_SQUARE_BRACKET 0x5d
    891 #endif
    892 
    893 /* Added at libpng-1.2.34 */
    894 #ifndef PNG_STRING_NEWLINE
    895 #define PNG_STRING_NEWLINE "\n"
    896 #endif
    897 
    898 /* These are currently experimental features, define them if you want */
    899 
    900 /* very little testing */
    901 /*
    902 #ifdef PNG_READ_SUPPORTED
    903 #  ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
    904 #    define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
    905 #  endif
    906 #endif
    907 */
    908 
    909 /* This is only for PowerPC big-endian and 680x0 systems */
    910 /* some testing */
    911 /*
    912 #ifndef PNG_READ_BIG_ENDIAN_SUPPORTED
    913 #  define PNG_READ_BIG_ENDIAN_SUPPORTED
    914 #endif
    915 */
    916 
    917 /* Buggy compilers (e.g., gcc 2.7.2.2) need this */
    918 /*
    919 #define PNG_NO_POINTER_INDEXING
    920 */
    921 
    922 #if !defined(PNG_NO_POINTER_INDEXING) && \
    923     !defined(PNG_POINTER_INDEXING_SUPPORTED)
    924 #  define PNG_POINTER_INDEXING_SUPPORTED
    925 #endif
    926 
    927 /* These functions are turned off by default, as they will be phased out. */
    928 /*
    929 #define  PNG_USELESS_TESTS_SUPPORTED
    930 #define  PNG_CORRECT_PALETTE_SUPPORTED
    931 */
    932 
    933 /* Any chunks you are not interested in, you can undef here.  The
    934  * ones that allocate memory may be expecially important (hIST,
    935  * tEXt, zTXt, tRNS, pCAL).  Others will just save time and make png_info
    936  * a bit smaller.
    937  */
    938 
    939 #if defined(PNG_READ_SUPPORTED) && \
    940     !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
    941     !defined(PNG_NO_READ_ANCILLARY_CHUNKS)
    942 #  define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
    943 #endif
    944 
    945 #if defined(PNG_WRITE_SUPPORTED) && \
    946     !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
    947     !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS)
    948 #  define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
    949 #endif
    950 
    951 #ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
    952 
    953 #ifdef PNG_NO_READ_TEXT
    954 #  define PNG_NO_READ_iTXt
    955 #  define PNG_NO_READ_tEXt
    956 #  define PNG_NO_READ_zTXt
    957 #endif
    958 #ifndef PNG_NO_READ_bKGD
    959 #  define PNG_READ_bKGD_SUPPORTED
    960 #  define PNG_bKGD_SUPPORTED
    961 #endif
    962 #ifndef PNG_NO_READ_cHRM
    963 #  define PNG_READ_cHRM_SUPPORTED
    964 #  define PNG_cHRM_SUPPORTED
    965 #endif
    966 #ifndef PNG_NO_READ_gAMA
    967 #  define PNG_READ_gAMA_SUPPORTED
    968 #  define PNG_gAMA_SUPPORTED
    969 #endif
    970 #ifndef PNG_NO_READ_hIST
    971 #  define PNG_READ_hIST_SUPPORTED
    972 #  define PNG_hIST_SUPPORTED
    973 #endif
    974 #ifndef PNG_NO_READ_iCCP
    975 #  define PNG_READ_iCCP_SUPPORTED
    976 #  define PNG_iCCP_SUPPORTED
    977 #endif
    978 #ifndef PNG_NO_READ_iTXt
    979 #  ifndef PNG_READ_iTXt_SUPPORTED
    980 #    define PNG_READ_iTXt_SUPPORTED
    981 #  endif
    982 #  ifndef PNG_iTXt_SUPPORTED
    983 #    define PNG_iTXt_SUPPORTED
    984 #  endif
    985 #endif
    986 #ifndef PNG_NO_READ_oFFs
    987 #  define PNG_READ_oFFs_SUPPORTED
    988 #  define PNG_oFFs_SUPPORTED
    989 #endif
    990 #ifndef PNG_NO_READ_pCAL
    991 #  define PNG_READ_pCAL_SUPPORTED
    992 #  define PNG_pCAL_SUPPORTED
    993 #endif
    994 #ifndef PNG_NO_READ_sCAL
    995 #  define PNG_READ_sCAL_SUPPORTED
    996 #  define PNG_sCAL_SUPPORTED
    997 #endif
    998 #ifndef PNG_NO_READ_pHYs
    999 #  define PNG_READ_pHYs_SUPPORTED
   1000 #  define PNG_pHYs_SUPPORTED
   1001 #endif
   1002 #ifndef PNG_NO_READ_sBIT
   1003 #  define PNG_READ_sBIT_SUPPORTED
   1004 #  define PNG_sBIT_SUPPORTED
   1005 #endif
   1006 #ifndef PNG_NO_READ_sPLT
   1007 #  define PNG_READ_sPLT_SUPPORTED
   1008 #  define PNG_sPLT_SUPPORTED
   1009 #endif
   1010 #ifndef PNG_NO_READ_sRGB
   1011 #  define PNG_READ_sRGB_SUPPORTED
   1012 #  define PNG_sRGB_SUPPORTED
   1013 #endif
   1014 #ifndef PNG_NO_READ_tEXt
   1015 #  define PNG_READ_tEXt_SUPPORTED
   1016 #  define PNG_tEXt_SUPPORTED
   1017 #endif
   1018 #ifndef PNG_NO_READ_tIME
   1019 #  define PNG_READ_tIME_SUPPORTED
   1020 #  define PNG_tIME_SUPPORTED
   1021 #endif
   1022 #ifndef PNG_NO_READ_tRNS
   1023 #  define PNG_READ_tRNS_SUPPORTED
   1024 #  define PNG_tRNS_SUPPORTED
   1025 #endif
   1026 #ifndef PNG_NO_READ_zTXt
   1027 #  define PNG_READ_zTXt_SUPPORTED
   1028 #  define PNG_zTXt_SUPPORTED
   1029 #endif
   1030 #ifndef PNG_NO_READ_OPT_PLTE
   1031 #  define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */
   1032 #endif                      /* optional PLTE chunk in RGB and RGBA images */
   1033 #if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \
   1034     defined(PNG_READ_zTXt_SUPPORTED)
   1035 #  define PNG_READ_TEXT_SUPPORTED
   1036 #  define PNG_TEXT_SUPPORTED
   1037 #endif
   1038 
   1039 #endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */
   1040 
   1041 #ifndef PNG_NO_READ_UNKNOWN_CHUNKS
   1042 #  define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
   1043 #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
   1044 #    define PNG_UNKNOWN_CHUNKS_SUPPORTED
   1045 #  endif
   1046 #endif
   1047 #if !defined(PNG_NO_READ_USER_CHUNKS) && \
   1048      defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
   1049 #  define PNG_READ_USER_CHUNKS_SUPPORTED
   1050 #  define PNG_USER_CHUNKS_SUPPORTED
   1051 #  ifdef PNG_NO_READ_UNKNOWN_CHUNKS
   1052 #    undef PNG_NO_READ_UNKNOWN_CHUNKS
   1053 #  endif
   1054 #  ifdef PNG_NO_HANDLE_AS_UNKNOWN
   1055 #    undef PNG_NO_HANDLE_AS_UNKNOWN
   1056 #  endif
   1057 #endif
   1058 
   1059 #ifndef PNG_NO_HANDLE_AS_UNKNOWN
   1060 #  ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
   1061 #    define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
   1062 #  endif
   1063 #endif
   1064 
   1065 #ifdef PNG_WRITE_SUPPORTED
   1066 #ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
   1067 
   1068 #ifdef PNG_NO_WRITE_TEXT
   1069 #  define PNG_NO_WRITE_iTXt
   1070 #  define PNG_NO_WRITE_tEXt
   1071 #  define PNG_NO_WRITE_zTXt
   1072 #endif
   1073 #ifndef PNG_NO_WRITE_bKGD
   1074 #  define PNG_WRITE_bKGD_SUPPORTED
   1075 #  ifndef PNG_bKGD_SUPPORTED
   1076 #    define PNG_bKGD_SUPPORTED
   1077 #  endif
   1078 #endif
   1079 #ifndef PNG_NO_WRITE_cHRM
   1080 #  define PNG_WRITE_cHRM_SUPPORTED
   1081 #  ifndef PNG_cHRM_SUPPORTED
   1082 #    define PNG_cHRM_SUPPORTED
   1083 #  endif
   1084 #endif
   1085 #ifndef PNG_NO_WRITE_gAMA
   1086 #  define PNG_WRITE_gAMA_SUPPORTED
   1087 #  ifndef PNG_gAMA_SUPPORTED
   1088 #    define PNG_gAMA_SUPPORTED
   1089 #  endif
   1090 #endif
   1091 #ifndef PNG_NO_WRITE_hIST
   1092 #  define PNG_WRITE_hIST_SUPPORTED
   1093 #  ifndef PNG_hIST_SUPPORTED
   1094 #    define PNG_hIST_SUPPORTED
   1095 #  endif
   1096 #endif
   1097 #ifndef PNG_NO_WRITE_iCCP
   1098 #  define PNG_WRITE_iCCP_SUPPORTED
   1099 #  ifndef PNG_iCCP_SUPPORTED
   1100 #    define PNG_iCCP_SUPPORTED
   1101 #  endif
   1102 #endif
   1103 #ifndef PNG_NO_WRITE_iTXt
   1104 #  ifndef PNG_WRITE_iTXt_SUPPORTED
   1105 #    define PNG_WRITE_iTXt_SUPPORTED
   1106 #  endif
   1107 #  ifndef PNG_iTXt_SUPPORTED
   1108 #    define PNG_iTXt_SUPPORTED
   1109 #  endif
   1110 #endif
   1111 #ifndef PNG_NO_WRITE_oFFs
   1112 #  define PNG_WRITE_oFFs_SUPPORTED
   1113 #  ifndef PNG_oFFs_SUPPORTED
   1114 #    define PNG_oFFs_SUPPORTED
   1115 #  endif
   1116 #endif
   1117 #ifndef PNG_NO_WRITE_pCAL
   1118 #  define PNG_WRITE_pCAL_SUPPORTED
   1119 #  ifndef PNG_pCAL_SUPPORTED
   1120 #    define PNG_pCAL_SUPPORTED
   1121 #  endif
   1122 #endif
   1123 #ifndef PNG_NO_WRITE_sCAL
   1124 #  define PNG_WRITE_sCAL_SUPPORTED
   1125 #  ifndef PNG_sCAL_SUPPORTED
   1126 #    define PNG_sCAL_SUPPORTED
   1127 #  endif
   1128 #endif
   1129 #ifndef PNG_NO_WRITE_pHYs
   1130 #  define PNG_WRITE_pHYs_SUPPORTED
   1131 #  ifndef PNG_pHYs_SUPPORTED
   1132 #    define PNG_pHYs_SUPPORTED
   1133 #  endif
   1134 #endif
   1135 #ifndef PNG_NO_WRITE_sBIT
   1136 #  define PNG_WRITE_sBIT_SUPPORTED
   1137 #  ifndef PNG_sBIT_SUPPORTED
   1138 #    define PNG_sBIT_SUPPORTED
   1139 #  endif
   1140 #endif
   1141 #ifndef PNG_NO_WRITE_sPLT
   1142 #  define PNG_WRITE_sPLT_SUPPORTED
   1143 #  ifndef PNG_sPLT_SUPPORTED
   1144 #    define PNG_sPLT_SUPPORTED
   1145 #  endif
   1146 #endif
   1147 #ifndef PNG_NO_WRITE_sRGB
   1148 #  define PNG_WRITE_sRGB_SUPPORTED
   1149 #  ifndef PNG_sRGB_SUPPORTED
   1150 #    define PNG_sRGB_SUPPORTED
   1151 #  endif
   1152 #endif
   1153 #ifndef PNG_NO_WRITE_tEXt
   1154 #  define PNG_WRITE_tEXt_SUPPORTED
   1155 #  ifndef PNG_tEXt_SUPPORTED
   1156 #    define PNG_tEXt_SUPPORTED
   1157 #  endif
   1158 #endif
   1159 #ifndef PNG_NO_WRITE_tIME
   1160 #  define PNG_WRITE_tIME_SUPPORTED
   1161 #  ifndef PNG_tIME_SUPPORTED
   1162 #    define PNG_tIME_SUPPORTED
   1163 #  endif
   1164 #endif
   1165 #ifndef PNG_NO_WRITE_tRNS
   1166 #  define PNG_WRITE_tRNS_SUPPORTED
   1167 #  ifndef PNG_tRNS_SUPPORTED
   1168 #    define PNG_tRNS_SUPPORTED
   1169 #  endif
   1170 #endif
   1171 #ifndef PNG_NO_WRITE_zTXt
   1172 #  define PNG_WRITE_zTXt_SUPPORTED
   1173 #  ifndef PNG_zTXt_SUPPORTED
   1174 #    define PNG_zTXt_SUPPORTED
   1175 #  endif
   1176 #endif
   1177 #if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
   1178     defined(PNG_WRITE_zTXt_SUPPORTED)
   1179 #  define PNG_WRITE_TEXT_SUPPORTED
   1180 #  ifndef PNG_TEXT_SUPPORTED
   1181 #    define PNG_TEXT_SUPPORTED
   1182 #  endif
   1183 #endif
   1184 
   1185 #ifdef PNG_WRITE_tIME_SUPPORTED
   1186 #  ifndef PNG_NO_CONVERT_tIME
   1187 #    ifndef _WIN32_WCE
   1188 /*   The "tm" structure is not supported on WindowsCE */
   1189 #      ifndef PNG_CONVERT_tIME_SUPPORTED
   1190 #        define PNG_CONVERT_tIME_SUPPORTED
   1191 #      endif
   1192 #   endif
   1193 #  endif
   1194 #endif
   1195 
   1196 #endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */
   1197 
   1198 #if !defined(PNG_NO_WRITE_FILTER) && !defined(PNG_WRITE_FILTER_SUPPORTED)
   1199 #  define PNG_WRITE_FILTER_SUPPORTED
   1200 #endif
   1201 
   1202 #ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS
   1203 #  define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
   1204 #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
   1205 #    define PNG_UNKNOWN_CHUNKS_SUPPORTED
   1206 #  endif
   1207 #endif
   1208 
   1209 #ifndef PNG_NO_HANDLE_AS_UNKNOWN
   1210 #  ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
   1211 #    define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
   1212 #  endif
   1213 #endif
   1214 #endif /* PNG_WRITE_SUPPORTED */
   1215 
   1216 /* Turn this off to disable png_read_png() and
   1217  * png_write_png() and leave the row_pointers member
   1218  * out of the info structure.
   1219  */
   1220 #ifndef PNG_NO_INFO_IMAGE
   1221 #  define PNG_INFO_IMAGE_SUPPORTED
   1222 #endif
   1223 
   1224 /* Need the time information for converting tIME chunks */
   1225 #ifdef PNG_CONVERT_tIME_SUPPORTED
   1226      /* "time.h" functions are not supported on WindowsCE */
   1227 #    include <time.h>
   1228 #endif
   1229 
   1230 /* Some typedefs to get us started.  These should be safe on most of the
   1231  * common platforms.  The typedefs should be at least as large as the
   1232  * numbers suggest (a png_uint_32 must be at least 32 bits long), but they
   1233  * don't have to be exactly that size.  Some compilers dislike passing
   1234  * unsigned shorts as function parameters, so you may be better off using
   1235  * unsigned int for png_uint_16.  Likewise, for 64-bit systems, you may
   1236  * want to have unsigned int for png_uint_32 instead of unsigned long.
   1237  */
   1238 
   1239 typedef unsigned long png_uint_32;
   1240 typedef long png_int_32;
   1241 typedef unsigned short png_uint_16;
   1242 typedef short png_int_16;
   1243 typedef unsigned char png_byte;
   1244 
   1245 /* This is usually size_t.  It is typedef'ed just in case you need it to
   1246    change (I'm not sure if you will or not, so I thought I'd be safe) */
   1247 #ifdef PNG_SIZE_T
   1248    typedef PNG_SIZE_T png_size_t;
   1249 #  define png_sizeof(x) png_convert_size(sizeof(x))
   1250 #else
   1251    typedef size_t png_size_t;
   1252 #  define png_sizeof(x) sizeof(x)
   1253 #endif
   1254 
   1255 /* The following is needed for medium model support.  It cannot be in the
   1256  * PNG_INTERNAL section.  Needs modification for other compilers besides
   1257  * MSC.  Model independent support declares all arrays and pointers to be
   1258  * large using the far keyword.  The zlib version used must also support
   1259  * model independent data.  As of version zlib 1.0.4, the necessary changes
   1260  * have been made in zlib.  The USE_FAR_KEYWORD define triggers other
   1261  * changes that are needed. (Tim Wegner)
   1262  */
   1263 
   1264 /* Separate compiler dependencies (problem here is that zlib.h always
   1265    defines FAR. (SJT) */
   1266 #ifdef __BORLANDC__
   1267 #  if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)
   1268 #    define LDATA 1
   1269 #  else
   1270 #    define LDATA 0
   1271 #  endif
   1272    /* GRR:  why is Cygwin in here?  Cygwin is not Borland C... */
   1273 #  if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)
   1274 #    define PNG_MAX_MALLOC_64K
   1275 #    if (LDATA != 1)
   1276 #      ifndef FAR
   1277 #        define FAR __far
   1278 #      endif
   1279 #      define USE_FAR_KEYWORD
   1280 #    endif   /* LDATA != 1 */
   1281      /* Possibly useful for moving data out of default segment.
   1282       * Uncomment it if you want. Could also define FARDATA as
   1283       * const if your compiler supports it. (SJT)
   1284 #    define FARDATA FAR
   1285       */
   1286 #  endif  /* __WIN32__, __FLAT__, __CYGWIN__ */
   1287 #endif   /* __BORLANDC__ */
   1288 
   1289 
   1290 /* Suggest testing for specific compiler first before testing for
   1291  * FAR.  The Watcom compiler defines both __MEDIUM__ and M_I86MM,
   1292  * making reliance oncertain keywords suspect. (SJT)
   1293  */
   1294 
   1295 /* MSC Medium model */
   1296 #ifdef FAR
   1297 #  ifdef M_I86MM
   1298 #    define USE_FAR_KEYWORD
   1299 #    define FARDATA FAR
   1300 #    include <dos.h>
   1301 #  endif
   1302 #endif
   1303 
   1304 /* SJT: default case */
   1305 #ifndef FAR
   1306 #  define FAR
   1307 #endif
   1308 
   1309 /* At this point FAR is always defined */
   1310 #ifndef FARDATA
   1311 #  define FARDATA
   1312 #endif
   1313 
   1314 /* Typedef for floating-point numbers that are converted
   1315    to fixed-point with a multiple of 100,000, e.g., int_gamma */
   1316 typedef png_int_32 png_fixed_point;
   1317 
   1318 /* Add typedefs for pointers */
   1319 typedef void            FAR * png_voidp;
   1320 typedef png_byte        FAR * png_bytep;
   1321 typedef png_uint_32     FAR * png_uint_32p;
   1322 typedef png_int_32      FAR * png_int_32p;
   1323 typedef png_uint_16     FAR * png_uint_16p;
   1324 typedef png_int_16      FAR * png_int_16p;
   1325 typedef PNG_CONST char  FAR * png_const_charp;
   1326 typedef char            FAR * png_charp;
   1327 typedef png_fixed_point FAR * png_fixed_point_p;
   1328 
   1329 #ifndef PNG_NO_STDIO
   1330 #ifdef _WIN32_WCE
   1331 typedef HANDLE                png_FILE_p;
   1332 #else
   1333 typedef FILE                * png_FILE_p;
   1334 #endif
   1335 #endif
   1336 
   1337 #ifdef PNG_FLOATING_POINT_SUPPORTED
   1338 typedef double          FAR * png_doublep;
   1339 #endif
   1340 
   1341 /* Pointers to pointers; i.e. arrays */
   1342 typedef png_byte        FAR * FAR * png_bytepp;
   1343 typedef png_uint_32     FAR * FAR * png_uint_32pp;
   1344 typedef png_int_32      FAR * FAR * png_int_32pp;
   1345 typedef png_uint_16     FAR * FAR * png_uint_16pp;
   1346 typedef png_int_16      FAR * FAR * png_int_16pp;
   1347 typedef PNG_CONST char  FAR * FAR * png_const_charpp;
   1348 typedef char            FAR * FAR * png_charpp;
   1349 typedef png_fixed_point FAR * FAR * png_fixed_point_pp;
   1350 #ifdef PNG_FLOATING_POINT_SUPPORTED
   1351 typedef double          FAR * FAR * png_doublepp;
   1352 #endif
   1353 
   1354 /* Pointers to pointers to pointers; i.e., pointer to array */
   1355 typedef char            FAR * FAR * FAR * png_charppp;
   1356 
   1357 #if defined(PNG_1_0_X) || defined(PNG_1_2_X)
   1358 /* SPC -  Is this stuff deprecated? */
   1359 /* It'll be removed as of libpng-1.4.0 - GR-P */
   1360 /* libpng typedefs for types in zlib. If zlib changes
   1361  * or another compression library is used, then change these.
   1362  * Eliminates need to change all the source files.
   1363  */
   1364 typedef charf *         png_zcharp;
   1365 typedef charf * FAR *   png_zcharpp;
   1366 typedef z_stream FAR *  png_zstreamp;
   1367 #endif /* (PNG_1_0_X) || defined(PNG_1_2_X) */
   1368 
   1369 /*
   1370  * Define PNG_BUILD_DLL if the module being built is a Windows
   1371  * LIBPNG DLL.
   1372  *
   1373  * Define PNG_USE_DLL if you want to *link* to the Windows LIBPNG DLL.
   1374  * It is equivalent to Microsoft predefined macro _DLL that is
   1375  * automatically defined when you compile using the share
   1376  * version of the CRT (C Run-Time library)
   1377  *
   1378  * The cygwin mods make this behavior a little different:
   1379  * Define PNG_BUILD_DLL if you are building a dll for use with cygwin
   1380  * Define PNG_STATIC if you are building a static library for use with cygwin,
   1381  *   -or- if you are building an application that you want to link to the
   1382  *   static library.
   1383  * PNG_USE_DLL is defined by default (no user action needed) unless one of
   1384  *   the other flags is defined.
   1385  */
   1386 
   1387 #if !defined(PNG_DLL) && (defined(PNG_BUILD_DLL) || defined(PNG_USE_DLL))
   1388 #  define PNG_DLL
   1389 #endif
   1390 /* If CYGWIN, then disallow GLOBAL ARRAYS unless building a static lib.
   1391  * When building a static lib, default to no GLOBAL ARRAYS, but allow
   1392  * command-line override
   1393  */
   1394 #ifdef __CYGWIN__
   1395 #  ifndef PNG_STATIC
   1396 #    ifdef PNG_USE_GLOBAL_ARRAYS
   1397 #      undef PNG_USE_GLOBAL_ARRAYS
   1398 #    endif
   1399 #    ifndef PNG_USE_LOCAL_ARRAYS
   1400 #      define PNG_USE_LOCAL_ARRAYS
   1401 #    endif
   1402 #  else
   1403 #    if defined(PNG_USE_LOCAL_ARRAYS) || defined(PNG_NO_GLOBAL_ARRAYS)
   1404 #      ifdef PNG_USE_GLOBAL_ARRAYS
   1405 #        undef PNG_USE_GLOBAL_ARRAYS
   1406 #      endif
   1407 #    endif
   1408 #  endif
   1409 #  if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
   1410 #    define PNG_USE_LOCAL_ARRAYS
   1411 #  endif
   1412 #endif
   1413 
   1414 /* Do not use global arrays (helps with building DLL's)
   1415  * They are no longer used in libpng itself, since version 1.0.5c,
   1416  * but might be required for some pre-1.0.5c applications.
   1417  */
   1418 #if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
   1419 #  if defined(PNG_NO_GLOBAL_ARRAYS) || \
   1420       (defined(__GNUC__) && defined(PNG_DLL)) || defined(_MSC_VER)
   1421 #    define PNG_USE_LOCAL_ARRAYS
   1422 #  else
   1423 #    define PNG_USE_GLOBAL_ARRAYS
   1424 #  endif
   1425 #endif
   1426 
   1427 #ifdef __CYGWIN__
   1428 #  undef PNGAPI
   1429 #  define PNGAPI __cdecl
   1430 #  undef PNG_IMPEXP
   1431 #  define PNG_IMPEXP
   1432 #endif
   1433 
   1434 /* If you define PNGAPI, e.g., with compiler option "-DPNGAPI=__stdcall",
   1435  * you may get warnings regarding the linkage of png_zalloc and png_zfree.
   1436  * Don't ignore those warnings; you must also reset the default calling
   1437  * convention in your compiler to match your PNGAPI, and you must build
   1438  * zlib and your applications the same way you build libpng.
   1439  */
   1440 
   1441 #if defined(__MINGW32__) && !defined(PNG_MODULEDEF)
   1442 #  ifndef PNG_NO_MODULEDEF
   1443 #    define PNG_NO_MODULEDEF
   1444 #  endif
   1445 #endif
   1446 
   1447 #if !defined(PNG_IMPEXP) && defined(PNG_BUILD_DLL) && !defined(PNG_NO_MODULEDEF)
   1448 #  define PNG_IMPEXP
   1449 #endif
   1450 
   1451 #if defined(PNG_DLL) || defined(_DLL) || defined(__DLL__ ) || \
   1452     (( defined(_Windows) || defined(_WINDOWS) || \
   1453        defined(WIN32) || defined(_WIN32) || defined(__WIN32__) ))
   1454 
   1455 #  ifndef PNGAPI
   1456 #     if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
   1457 #        define PNGAPI __cdecl
   1458 #     else
   1459 #        define PNGAPI _cdecl
   1460 #     endif
   1461 #  endif
   1462 
   1463 #  if !defined(PNG_IMPEXP) && (!defined(PNG_DLL) || \
   1464        0 /* WINCOMPILER_WITH_NO_SUPPORT_FOR_DECLIMPEXP */)
   1465 #     define PNG_IMPEXP
   1466 #  endif
   1467 
   1468 #  ifndef PNG_IMPEXP
   1469 
   1470 #     define PNG_EXPORT_TYPE1(type,symbol)  PNG_IMPEXP type PNGAPI symbol
   1471 #     define PNG_EXPORT_TYPE2(type,symbol)  type PNG_IMPEXP PNGAPI symbol
   1472 
   1473       /* Borland/Microsoft */
   1474 #     if defined(_MSC_VER) || defined(__BORLANDC__)
   1475 #        if (_MSC_VER >= 800) || (__BORLANDC__ >= 0x500)
   1476 #           define PNG_EXPORT PNG_EXPORT_TYPE1
   1477 #        else
   1478 #           define PNG_EXPORT PNG_EXPORT_TYPE2
   1479 #           ifdef PNG_BUILD_DLL
   1480 #              define PNG_IMPEXP __export
   1481 #           else
   1482 #              define PNG_IMPEXP /*__import */ /* doesn't exist AFAIK in
   1483                                                  VC++ */
   1484 #           endif                             /* Exists in Borland C++ for
   1485                                                  C++ classes (== huge) */
   1486 #        endif
   1487 #     endif
   1488 
   1489 #     ifndef PNG_IMPEXP
   1490 #        ifdef PNG_BUILD_DLL
   1491 #           define PNG_IMPEXP __declspec(dllexport)
   1492 #        else
   1493 #           define PNG_IMPEXP __declspec(dllimport)
   1494 #        endif
   1495 #     endif
   1496 #  endif  /* PNG_IMPEXP */
   1497 #else /* !(DLL || non-cygwin WINDOWS) */
   1498 #   if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
   1499 #      ifndef PNGAPI
   1500 #         define PNGAPI _System
   1501 #      endif
   1502 #   else
   1503 #      if 0 /* ... other platforms, with other meanings */
   1504 #      endif
   1505 #   endif
   1506 #endif
   1507 
   1508 #ifndef PNGAPI
   1509 #  define PNGAPI
   1510 #endif
   1511 #ifndef PNG_IMPEXP
   1512 #  if ((__GNUC__-0) * 10 + __GNUC_MINOR__-0 >= 33)
   1513 #    define PNG_IMPEXP  __attribute__((visibility ("default")))
   1514 #  else
   1515 #    define PNG_IMPEXP
   1516 #  endif
   1517 #endif
   1518 
   1519 #ifdef PNG_BUILDSYMS
   1520 #  ifndef PNG_EXPORT
   1521 #    define PNG_EXPORT(type,symbol) PNG_FUNCTION_EXPORT symbol END
   1522 #  endif
   1523 #  ifdef PNG_USE_GLOBAL_ARRAYS
   1524 #    ifndef PNG_EXPORT_VAR
   1525 #      define PNG_EXPORT_VAR(type) PNG_DATA_EXPORT
   1526 #    endif
   1527 #  endif
   1528 #endif
   1529 
   1530 #ifndef PNG_EXPORT
   1531 #  define PNG_EXPORT(type,symbol) PNG_IMPEXP type PNGAPI symbol
   1532 #endif
   1533 
   1534 #ifdef PNG_USE_GLOBAL_ARRAYS
   1535 #  ifndef PNG_EXPORT_VAR
   1536 #    define PNG_EXPORT_VAR(type) extern PNG_IMPEXP type
   1537 #  endif
   1538 #endif
   1539 
   1540 #ifdef PNG_PEDANTIC_WARNINGS
   1541 #  ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED
   1542 #    define PNG_PEDANTIC_WARNINGS_SUPPORTED
   1543 #  endif
   1544 #endif
   1545 
   1546 #ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED
   1547 /* Support for compiler specific function attributes.  These are used
   1548  * so that where compiler support is available incorrect use of API
   1549  * functions in png.h will generate compiler warnings.  Added at libpng
   1550  * version 1.2.41.
   1551  */
   1552 #  ifdef __GNUC__
   1553 #    ifndef PNG_USE_RESULT
   1554 #      define PNG_USE_RESULT __attribute__((__warn_unused_result__))
   1555 #    endif
   1556 #    ifndef PNG_NORETURN
   1557 #      define PNG_NORETURN   __attribute__((__noreturn__))
   1558 #    endif
   1559 #    ifndef PNG_ALLOCATED
   1560 #      define PNG_ALLOCATED  __attribute__((__malloc__))
   1561 #    endif
   1562 
   1563     /* This specifically protects structure members that should only be
   1564      * accessed from within the library, therefore should be empty during
   1565      * a library build.
   1566      */
   1567 #    ifndef PNG_DEPRECATED
   1568 #      define PNG_DEPRECATED __attribute__((__deprecated__))
   1569 #    endif
   1570 #    ifndef PNG_DEPSTRUCT
   1571 #      define PNG_DEPSTRUCT  __attribute__((__deprecated__))
   1572 #    endif
   1573 #    ifndef PNG_PRIVATE
   1574 #      if 0 /* Doesn't work so we use deprecated instead*/
   1575 #        define PNG_PRIVATE \
   1576           __attribute__((warning("This function is not exported by libpng.")))
   1577 #      else
   1578 #        define PNG_PRIVATE \
   1579           __attribute__((__deprecated__))
   1580 #      endif
   1581 #    endif /* PNG_PRIVATE */
   1582 #  endif /* __GNUC__ */
   1583 #endif /* PNG_PEDANTIC_WARNINGS */
   1584 
   1585 #ifndef PNG_DEPRECATED
   1586 #  define PNG_DEPRECATED  /* Use of this function is deprecated */
   1587 #endif
   1588 #ifndef PNG_USE_RESULT
   1589 #  define PNG_USE_RESULT  /* The result of this function must be checked */
   1590 #endif
   1591 #ifndef PNG_NORETURN
   1592 #  define PNG_NORETURN    /* This function does not return */
   1593 #endif
   1594 #ifndef PNG_ALLOCATED
   1595 #  define PNG_ALLOCATED   /* The result of the function is new memory */
   1596 #endif
   1597 #ifndef PNG_DEPSTRUCT
   1598 #  define PNG_DEPSTRUCT   /* Access to this struct member is deprecated */
   1599 #endif
   1600 #ifndef PNG_PRIVATE
   1601 #  define PNG_PRIVATE     /* This is a private libpng function */
   1602 #endif
   1603 
   1604 /* User may want to use these so they are not in PNG_INTERNAL. Any library
   1605  * functions that are passed far data must be model independent.
   1606  */
   1607 
   1608 #ifndef PNG_ABORT
   1609 #  define PNG_ABORT() abort()
   1610 #endif
   1611 
   1612 #ifdef PNG_SETJMP_SUPPORTED
   1613 #  define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf)
   1614 #else
   1615 #  define png_jmpbuf(png_ptr) \
   1616    (LIBPNG_WAS_COMPILED_WITH__PNG_SETJMP_NOT_SUPPORTED)
   1617 #endif
   1618 
   1619 #ifdef USE_FAR_KEYWORD  /* memory model independent fns */
   1620 /* Use this to make far-to-near assignments */
   1621 #  define CHECK   1
   1622 #  define NOCHECK 0
   1623 #  define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK))
   1624 #  define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK))
   1625 #  define png_snprintf _fsnprintf   /* Added to v 1.2.19 */
   1626 #  define png_strlen  _fstrlen
   1627 #  define png_memcmp  _fmemcmp    /* SJT: added */
   1628 #  define png_memcpy  _fmemcpy
   1629 #  define png_memset  _fmemset
   1630 #else /* Use the usual functions */
   1631 #  define CVT_PTR(ptr)         (ptr)
   1632 #  define CVT_PTR_NOCHECK(ptr) (ptr)
   1633 #  ifndef PNG_NO_SNPRINTF
   1634 #    ifdef _MSC_VER
   1635 #      define png_snprintf _snprintf   /* Added to v 1.2.19 */
   1636 #      define png_snprintf2 _snprintf
   1637 #      define png_snprintf6 _snprintf
   1638 #    else
   1639 #      define png_snprintf snprintf   /* Added to v 1.2.19 */
   1640 #      define png_snprintf2 snprintf
   1641 #      define png_snprintf6 snprintf
   1642 #    endif
   1643 #  else
   1644      /* You don't have or don't want to use snprintf().  Caution: Using
   1645       * sprintf instead of snprintf exposes your application to accidental
   1646       * or malevolent buffer overflows.  If you don't have snprintf()
   1647       * as a general rule you should provide one (you can get one from
   1648       * Portable OpenSSH).
   1649       */
   1650 #    define png_snprintf(s1,n,fmt,x1) sprintf(s1,fmt,x1)
   1651 #    define png_snprintf2(s1,n,fmt,x1,x2) sprintf(s1,fmt,x1,x2)
   1652 #    define png_snprintf6(s1,n,fmt,x1,x2,x3,x4,x5,x6) \
   1653         sprintf(s1,fmt,x1,x2,x3,x4,x5,x6)
   1654 #  endif
   1655 #  define png_strlen  strlen
   1656 #  define png_memcmp  memcmp      /* SJT: added */
   1657 #  define png_memcpy  memcpy
   1658 #  define png_memset  memset
   1659 #endif
   1660 /* End of memory model independent support */
   1661 
   1662 /* Just a little check that someone hasn't tried to define something
   1663  * contradictory.
   1664  */
   1665 #if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K)
   1666 #  undef PNG_ZBUF_SIZE
   1667 #  define PNG_ZBUF_SIZE 65536L
   1668 #endif
   1669 
   1670 /* Added at libpng-1.2.8 */
   1671 #endif /* PNG_VERSION_INFO_ONLY */
   1672 
   1673 #endif /* PNGCONF_H */
   1674