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# pngconf.h

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    00001
    00002 /* pngconf.h - machine configurable file for libpng
    00003  *
    00004  * libpng version 1.2.7 - September 12, 2004
    00005  * For conditions of distribution and use, see copyright notice in png.h
    00006  * Copyright (c) 1998-2004 Glenn Randers-Pehrson
    00007  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
    00008  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
    00009  */
    00010
    00011 /* Any machine specific code is near the front of this file, so if you
    00012  * are configuring libpng for a machine, you may want to read the section
    00013  * starting here down to where it starts to typedef png_color, png_text,
    00014  * and png_info.
    00015  */
    00016
    00017 #ifndef PNGCONF_H
    00018 #define PNGCONF_H
    00019
    00020 #ifdef PNG_USER_CONFIG
    00021 #include "pngusr.h"
    00022 #endif
    00023
    00024 /* This is the size of the compression buffer, and thus the size of
    00025  * an IDAT chunk.  Make this whatever size you feel is best for your
    00026  * machine.  One of these will be allocated per png_struct.  When this
    00027  * is full, it writes the data to the disk, and does some other
    00028  * calculations.  Making this an extremely small size will slow
    00029  * the library down, but you may want to experiment to determine
    00030  * where it becomes significant, if you are concerned with memory
    00031  * usage.  Note that zlib allocates at least 32Kb also.  For readers,
    00032  * this describes the size of the buffer available to read the data in.
    00033  * Unless this gets smaller than the size of a row (compressed),
    00034  * it should not make much difference how big this is.
    00035  */
    00036
    00037 #ifndef PNG_ZBUF_SIZE
    00038 #  define PNG_ZBUF_SIZE 8192
    00039 #endif
    00040
    00041 /* Enable if you want a write-only libpng */
    00042
    00043 #ifndef PNG_NO_READ_SUPPORTED
    00044 #  define PNG_READ_SUPPORTED
    00045 #endif
    00046
    00047 /* Enable if you want a read-only libpng */
    00048
    00049 #ifndef PNG_NO_WRITE_SUPPORTED
    00050 #  define PNG_WRITE_SUPPORTED
    00051 #endif
    00052
    00053 /* Enabled by default in 1.2.0.  You can disable this if you don't need to
    00054    support PNGs that are embedded in MNG datastreams */
    00055 #if !defined(PNG_1_0_X) && !defined(PNG_NO_MNG_FEATURES)
    00056 #  ifndef PNG_MNG_FEATURES_SUPPORTED
    00057 #    define PNG_MNG_FEATURES_SUPPORTED
    00058 #  endif
    00059 #endif
    00060
    00061 #ifndef PNG_NO_FLOATING_POINT_SUPPORTED
    00062 #  ifndef PNG_FLOATING_POINT_SUPPORTED
    00063 #    define PNG_FLOATING_POINT_SUPPORTED
    00064 #  endif
    00065 #endif
    00066
    00067 /* If you are running on a machine where you cannot allocate more
    00068  * than 64K of memory at once, uncomment this.  While libpng will not
    00069  * normally need that much memory in a chunk (unless you load up a very
    00070  * large file), zlib needs to know how big of a chunk it can use, and
    00071  * libpng thus makes sure to check any memory allocation to verify it
    00072  * will fit into memory.
    00073 #define PNG_MAX_MALLOC_64K
    00074  */
    00075 #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
    00076 #  define PNG_MAX_MALLOC_64K
    00077 #endif
    00078
    00079 /* Special munging to support doing things the 'cygwin' way:
    00080  * 'Normal' png-on-win32 defines/defaults:
    00081  *   PNG_BUILD_DLL -- building dll
    00082  *   PNG_USE_DLL   -- building an application, linking to dll
    00083  *   (no define)   -- building static library, or building an
    00084  *                    application and linking to the static lib
    00085  * 'Cygwin' defines/defaults:
    00086  *   PNG_BUILD_DLL -- (ignored) building the dll
    00087  *   (no define)   -- (ignored) building an application, linking to the dll
    00088  *   PNG_STATIC    -- (ignored) building the static lib, or building an
    00089  *                    application that links to the static lib.
    00090  *   ALL_STATIC    -- (ignored) building various static libs, or building an
    00091  *                    application that links to the static libs.
    00092  * Thus,
    00093  * a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and
    00094  * this bit of #ifdefs will define the 'correct' config variables based on
    00095  * that. If a cygwin user *wants* to define 'PNG_USE_DLL' that's okay, but
    00096  * unnecessary.
    00097  *
    00098  * Also, the precedence order is:
    00099  *   ALL_STATIC (since we can't #undef something outside our namespace)
    00100  *   PNG_BUILD_DLL
    00101  *   PNG_STATIC
    00102  *   (nothing) == PNG_USE_DLL
    00103  *
    00104  * CYGWIN (2002-01-20): The preceding is now obsolete. With the advent
    00105  *   of auto-import in binutils, we no longer need to worry about
    00106  *   __declspec(dllexport) / __declspec(dllimport) and friends.  Therefore,
    00107  *   we don't need to worry about PNG_STATIC or ALL_STATIC when it comes
    00108  *   to __declspec() stuff.  However, we DO need to worry about
    00109  *   PNG_BUILD_DLL and PNG_STATIC because those change some defaults
    00110  *   such as CONSOLE_IO and whether GLOBAL_ARRAYS are allowed.
    00111  */
    00112 #if defined(__CYGWIN__)
    00113 #  if defined(ALL_STATIC)
    00114 #    if defined(PNG_BUILD_DLL)
    00115 #      undef PNG_BUILD_DLL
    00116 #    endif
    00117 #    if defined(PNG_USE_DLL)
    00118 #      undef PNG_USE_DLL
    00119 #    endif
    00120 #    if defined(PNG_DLL)
    00121 #      undef PNG_DLL
    00122 #    endif
    00123 #    if !defined(PNG_STATIC)
    00124 #      define PNG_STATIC
    00125 #    endif
    00126 #  else
    00127 #    if defined (PNG_BUILD_DLL)
    00128 #      if defined(PNG_STATIC)
    00129 #        undef PNG_STATIC
    00130 #      endif
    00131 #      if defined(PNG_USE_DLL)
    00132 #        undef PNG_USE_DLL
    00133 #      endif
    00134 #      if !defined(PNG_DLL)
    00135 #        define PNG_DLL
    00136 #      endif
    00137 #    else
    00138 #      if defined(PNG_STATIC)
    00139 #        if defined(PNG_USE_DLL)
    00140 #          undef PNG_USE_DLL
    00141 #        endif
    00142 #        if defined(PNG_DLL)
    00143 #          undef PNG_DLL
    00144 #        endif
    00145 #      else
    00146 #        if !defined(PNG_USE_DLL)
    00147 #          define PNG_USE_DLL
    00148 #        endif
    00149 #        if !defined(PNG_DLL)
    00150 #          define PNG_DLL
    00151 #        endif
    00152 #      endif
    00153 #    endif
    00154 #  endif
    00155 #endif
    00156
    00157 /* This protects us against compilers that run on a windowing system
    00158  * and thus don't have or would rather us not use the stdio types:
    00159  * stdin, stdout, and stderr.  The only one currently used is stderr
    00160  * in png_error() and png_warning().  #defining PNG_NO_CONSOLE_IO will
    00161  * prevent these from being compiled and used. #defining PNG_NO_STDIO
    00162  * will also prevent these, plus will prevent the entire set of stdio
    00163  * macros and functions (FILE *, printf, etc.) from being compiled and used,
    00164  * unless (PNG_DEBUG > 0) has been #defined.
    00165  *
    00166  * #define PNG_NO_CONSOLE_IO
    00167  * #define PNG_NO_STDIO
    00168  */
    00169
    00170 #if defined(_WIN32_WCE)
    00171 #  include <windows.h>
    00172    /* Console I/O functions are not supported on WindowsCE */
    00173 #  define PNG_NO_CONSOLE_IO
    00174 #  ifdef PNG_DEBUG
    00175 #    undef PNG_DEBUG
    00176 #  endif
    00177 #endif
    00178
    00179 #ifdef PNG_BUILD_DLL
    00180 #  ifndef PNG_CONSOLE_IO_SUPPORTED
    00181 #    ifndef PNG_NO_CONSOLE_IO
    00182 #      define PNG_NO_CONSOLE_IO
    00183 #    endif
    00184 #  endif
    00185 #endif
    00186
    00187 #  ifdef PNG_NO_STDIO
    00188 #    ifndef PNG_NO_CONSOLE_IO
    00189 #      define PNG_NO_CONSOLE_IO
    00190 #    endif
    00191 #    ifdef PNG_DEBUG
    00192 #      if (PNG_DEBUG > 0)
    00193 #        include <stdio.h>
    00194 #      endif
    00195 #    endif
    00196 #  else
    00197 #    if !defined(_WIN32_WCE)
    00198 /* "stdio.h" functions are not supported on WindowsCE */
    00199 #      include <stdio.h>
    00200 #    endif
    00201 #  endif
    00202
    00203 /* This macro protects us against machines that don't have function
    00204  * prototypes (ie K&R style headers).  If your compiler does not handle
    00205  * function prototypes, define this macro and use the included ansi2knr.
    00206  * I've always been able to use _NO_PROTO as the indicator, but you may
    00207  * need to drag the empty declaration out in front of here, or change the
    00208  * ifdef to suit your own needs.
    00209  */
    00210 #ifndef PNGARG
    00211
    00212 #ifdef OF /* zlib prototype munger */
    00213 #  define PNGARG(arglist) OF(arglist)
    00214 #else
    00215
    00216 #ifdef _NO_PROTO
    00217 #  define PNGARG(arglist) ()
    00218 #  ifndef PNG_TYPECAST_NULL
    00219 #     define PNG_TYPECAST_NULL
    00220 #  endif
    00221 #else
    00222 #  define PNGARG(arglist) arglist
    00223 #endif /* _NO_PROTO */
    00224
    00225 #endif /* OF */
    00226
    00227 #endif /* PNGARG */
    00228
    00229 /* Try to determine if we are compiling on a Mac.  Note that testing for
    00230  * just __MWERKS__ is not good enough, because the Codewarrior is now used
    00231  * on non-Mac platforms.
    00232  */
    00233 #ifndef MACOS
    00234 #  if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
    00235       defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC)
    00236 #    define MACOS
    00237 #  endif
    00238 #endif
    00239
    00240 /* enough people need this for various reasons to include it here */
    00241 #if !defined(MACOS) && !defined(RISCOS) && !defined(_WIN32_WCE)
    00242 #  include <sys/types.h>
    00243 #endif
    00244
    00245 #if !defined(PNG_SETJMP_NOT_SUPPORTED) && !defined(PNG_NO_SETJMP_SUPPORTED)
    00246 #  define PNG_SETJMP_SUPPORTED
    00247 #endif
    00248
    00249 #ifdef PNG_SETJMP_SUPPORTED
    00250 /* This is an attempt to force a single setjmp behaviour on Linux.  If
    00251  * the X config stuff didn't define _BSD_SOURCE we wouldn't need this.
    00252  */
    00253
    00254 #  ifdef __linux__
    00255 #    ifdef _BSD_SOURCE
    00256 #      define PNG_SAVE_BSD_SOURCE
    00257 #      undef _BSD_SOURCE
    00258 #    endif
    00259 #    ifdef _SETJMP_H
    00260      /* If you encounter a compiler error here, see the explanation
    00261       * near the end of INSTALL.
    00262       */
    00263          __png.h__ already includes setjmp.h;
    00264          __dont__ include it again.;
    00265 #    endif
    00266 #  endif /* __linux__ */
    00267
    00268    /* include setjmp.h for error handling */
    00269 #  include <setjmp.h>
    00270
    00271 #  ifdef __linux__
    00272 #    ifdef PNG_SAVE_BSD_SOURCE
    00273 #      define _BSD_SOURCE
    00274 #      undef PNG_SAVE_BSD_SOURCE
    00275 #    endif
    00276 #  endif /* __linux__ */
    00277 #endif /* PNG_SETJMP_SUPPORTED */
    00278
    00279 #ifdef BSD
    00280 #  include <strings.h>
    00281 #else
    00282 #  include <string.h>
    00283 #endif
    00284
    00285 /* Other defines for things like memory and the like can go here.  */
    00286 #ifdef PNG_INTERNAL
    00287
    00288 #include <stdlib.h>
    00289
    00290 /* The functions exported by PNG_EXTERN are PNG_INTERNAL functions, which
    00291  * aren't usually used outside the library (as far as I know), so it is
    00292  * debatable if they should be exported at all.  In the future, when it is
    00293  * possible to have run-time registry of chunk-handling functions, some of
    00294  * these will be made available again.
    00295 #define PNG_EXTERN extern
    00296  */
    00297 #define PNG_EXTERN
    00298
    00299 /* Other defines specific to compilers can go here.  Try to keep
    00300  * them inside an appropriate ifdef/endif pair for portability.
    00301  */
    00302
    00303 #if defined(PNG_FLOATING_POINT_SUPPORTED)
    00304 #  if defined(MACOS)
    00305      /* We need to check that <math.h> hasn't already been included earlier
    00306       * as it seems it doesn't agree with <fp.h>, yet we should really use
    00307       * <fp.h> if possible.
    00308       */
    00309 #    if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__)
    00310 #      include <fp.h>
    00311 #    endif
    00312 #  else
    00313 #    include <math.h>
    00314 #  endif
    00315 #  if defined(_AMIGA) && defined(__SASC) && defined(_M68881)
    00316      /* Amiga SAS/C: We must include builtin FPU functions when compiling using
    00317       * MATH=68881
    00318       */
    00319 #    include <m68881.h>
    00320 #  endif
    00321 #endif
    00322
    00323 /* Codewarrior on NT has linking problems without this. */
    00324 #if (defined(__MWERKS__) && defined(WIN32)) || defined(__STDC__)
    00325 #  define PNG_ALWAYS_EXTERN
    00326 #endif
    00327
    00328 /* This provides the non-ANSI (far) memory allocation routines. */
    00329 #if defined(__TURBOC__) && defined(__MSDOS__)
    00330 #  include <mem.h>
    00331 #  include <alloc.h>
    00332 #endif
    00333
    00334 /* I have no idea why is this necessary... */
    00335 #if defined(_MSC_VER) && (defined(WIN32) || defined(_Windows) || \
    00336     defined(_WINDOWS) || defined(_WIN32) || defined(__WIN32__))
    00337 #  include <malloc.h>
    00338 #endif
    00339
    00340 /* This controls how fine the dithering gets.  As this allocates
    00341  * a largish chunk of memory (32K), those who are not as concerned
    00342  * with dithering quality can decrease some or all of these.
    00343  */
    00344 #ifndef PNG_DITHER_RED_BITS
    00345 #  define PNG_DITHER_RED_BITS 5
    00346 #endif
    00347 #ifndef PNG_DITHER_GREEN_BITS
    00348 #  define PNG_DITHER_GREEN_BITS 5
    00349 #endif
    00350 #ifndef PNG_DITHER_BLUE_BITS
    00351 #  define PNG_DITHER_BLUE_BITS 5
    00352 #endif
    00353
    00354 /* This controls how fine the gamma correction becomes when you
    00355  * are only interested in 8 bits anyway.  Increasing this value
    00356  * results in more memory being used, and more pow() functions
    00357  * being called to fill in the gamma tables.  Don't set this value
    00358  * less then 8, and even that may not work (I haven't tested it).
    00359  */
    00360
    00361 #ifndef PNG_MAX_GAMMA_8
    00362 #  define PNG_MAX_GAMMA_8 11
    00363 #endif
    00364
    00365 /* This controls how much a difference in gamma we can tolerate before
    00366  * we actually start doing gamma conversion.
    00367  */
    00368 #ifndef PNG_GAMMA_THRESHOLD
    00369 #  define PNG_GAMMA_THRESHOLD 0.05
    00370 #endif
    00371
    00372 #endif /* PNG_INTERNAL */
    00373
    00374 /* The following uses const char * instead of char * for error
    00375  * and warning message functions, so some compilers won't complain.
    00376  * If you do not want to use const, define PNG_NO_CONST here.
    00377  */
    00378
    00379 #ifndef PNG_NO_CONST
    00380 #  define PNG_CONST const
    00381 #else
    00382 #  define PNG_CONST
    00383 #endif
    00384
    00385 /* The following defines give you the ability to remove code from the
    00386  * library that you will not be using.  I wish I could figure out how to
    00387  * automate this, but I can't do that without making it seriously hard
    00388  * on the users.  So if you are not using an ability, change the #define
    00389  * to and #undef, and that part of the library will not be compiled.  If
    00390  * your linker can't find a function, you may want to make sure the
    00391  * ability is defined here.  Some of these depend upon some others being
    00392  * defined.  I haven't figured out all the interactions here, so you may
    00393  * have to experiment awhile to get everything to compile.  If you are
    00394  * creating or using a shared library, you probably shouldn't touch this,
    00395  * as it will affect the size of the structures, and this will cause bad
    00396  * things to happen if the library and/or application ever change.
    00397  */
    00398
    00399 /* Any features you will not be using can be undef'ed here */
    00400
    00401 /* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user
    00402  * to turn it off with "*TRANSFORMS_NOT_SUPPORTED" or *PNG_NO_*_TRANSFORMS
    00403  * on the compile line, then pick and choose which ones to define without
    00404  * having to edit this file. It is safe to use the *TRANSFORMS_NOT_SUPPORTED
    00405  * if you only want to have a png-compliant reader/writer but don't need
    00406  * any of the extra transformations.  This saves about 80 kbytes in a
    00407  * typical installation of the library. (PNG_NO_* form added in version
    00408  * 1.0.1c, for consistency)
    00409  */
    00410
    00411 /* The size of the png_text structure changed in libpng-1.0.6 when
    00412  * iTXt is supported.  It is turned off by default, to support old apps
    00413  * that malloc the png_text structure instead of calling png_set_text()
    00414  * and letting libpng malloc it.  It will be turned on by default in
    00415  * libpng-1.3.0.
    00416  */
    00417
    00418 #ifndef PNG_iTXt_SUPPORTED
    00419 #  if !defined(PNG_READ_iTXt_SUPPORTED) && !defined(PNG_NO_READ_iTXt)
    00420 #    define PNG_NO_READ_iTXt
    00421 #  endif
    00422 #  if !defined(PNG_WRITE_iTXt_SUPPORTED) && !defined(PNG_NO_WRITE_iTXt)
    00423 #    define PNG_NO_WRITE_iTXt
    00424 #  endif
    00425 #endif
    00426
    00427 /* The following support, added after version 1.0.0, can be turned off here en
    00428  * masse by defining PNG_LEGACY_SUPPORTED in case you need binary compatibility
    00429  * with old applications that require the length of png_struct and png_info
    00430  * to remain unchanged.
    00431  */
    00432
    00433 #ifdef PNG_LEGACY_SUPPORTED
    00434 #  define PNG_NO_FREE_ME
    00435 #  define PNG_NO_READ_UNKNOWN_CHUNKS
    00436 #  define PNG_NO_WRITE_UNKNOWN_CHUNKS
    00437 #  define PNG_NO_READ_USER_CHUNKS
    00438 #  define PNG_NO_READ_iCCP
    00439 #  define PNG_NO_WRITE_iCCP
    00440 #  define PNG_NO_READ_iTXt
    00441 #  define PNG_NO_WRITE_iTXt
    00442 #  define PNG_NO_READ_sCAL
    00443 #  define PNG_NO_WRITE_sCAL
    00444 #  define PNG_NO_READ_sPLT
    00445 #  define PNG_NO_WRITE_sPLT
    00446 #  define PNG_NO_INFO_IMAGE
    00447 #  define PNG_NO_READ_RGB_TO_GRAY
    00448 #  define PNG_NO_READ_USER_TRANSFORM
    00449 #  define PNG_NO_WRITE_USER_TRANSFORM
    00450 #  define PNG_NO_USER_MEM
    00451 #  define PNG_NO_READ_EMPTY_PLTE
    00452 #  define PNG_NO_MNG_FEATURES
    00453 #  define PNG_NO_FIXED_POINT_SUPPORTED
    00454 #endif
    00455
    00456 /* Ignore attempt to turn off both floating and fixed point support */
    00457 #if !defined(PNG_FLOATING_POINT_SUPPORTED) || \
    00458     !defined(PNG_NO_FIXED_POINT_SUPPORTED)
    00459 #  define PNG_FIXED_POINT_SUPPORTED
    00460 #endif
    00461
    00462 #ifndef PNG_NO_FREE_ME
    00463 #  define PNG_FREE_ME_SUPPORTED
    00464 #endif
    00465
    00466 #if defined(PNG_READ_SUPPORTED)
    00467
    00468 #if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \
    00469       !defined(PNG_NO_READ_TRANSFORMS)
    00470 #  define PNG_READ_TRANSFORMS_SUPPORTED
    00471 #endif
    00472
    00473 #ifdef PNG_READ_TRANSFORMS_SUPPORTED
    00474 #  ifndef PNG_NO_READ_EXPAND
    00475 #    define PNG_READ_EXPAND_SUPPORTED
    00476 #  endif
    00477 #  ifndef PNG_NO_READ_SHIFT
    00478 #    define PNG_READ_SHIFT_SUPPORTED
    00479 #  endif
    00480 #  ifndef PNG_NO_READ_PACK
    00481 #    define PNG_READ_PACK_SUPPORTED
    00482 #  endif
    00483 #  ifndef PNG_NO_READ_BGR
    00484 #    define PNG_READ_BGR_SUPPORTED
    00485 #  endif
    00486 #  ifndef PNG_NO_READ_SWAP
    00487 #    define PNG_READ_SWAP_SUPPORTED
    00488 #  endif
    00489 #  ifndef PNG_NO_READ_PACKSWAP
    00490 #    define PNG_READ_PACKSWAP_SUPPORTED
    00491 #  endif
    00492 #  ifndef PNG_NO_READ_INVERT
    00493 #    define PNG_READ_INVERT_SUPPORTED
    00494 #  endif
    00495 #  ifndef PNG_NO_READ_DITHER
    00496 #    define PNG_READ_DITHER_SUPPORTED
    00497 #  endif
    00498 #  ifndef PNG_NO_READ_BACKGROUND
    00499 #    define PNG_READ_BACKGROUND_SUPPORTED
    00500 #  endif
    00501 #  ifndef PNG_NO_READ_16_TO_8
    00502 #    define PNG_READ_16_TO_8_SUPPORTED
    00503 #  endif
    00504 #  ifndef PNG_NO_READ_FILLER
    00505 #    define PNG_READ_FILLER_SUPPORTED
    00506 #  endif
    00507 #  ifndef PNG_NO_READ_GAMMA
    00508 #    define PNG_READ_GAMMA_SUPPORTED
    00509 #  endif
    00510 #  ifndef PNG_NO_READ_GRAY_TO_RGB
    00511 #    define PNG_READ_GRAY_TO_RGB_SUPPORTED
    00512 #  endif
    00513 #  ifndef PNG_NO_READ_SWAP_ALPHA
    00514 #    define PNG_READ_SWAP_ALPHA_SUPPORTED
    00515 #  endif
    00516 #  ifndef PNG_NO_READ_INVERT_ALPHA
    00517 #    define PNG_READ_INVERT_ALPHA_SUPPORTED
    00518 #  endif
    00519 #  ifndef PNG_NO_READ_STRIP_ALPHA
    00520 #    define PNG_READ_STRIP_ALPHA_SUPPORTED
    00521 #  endif
    00522 #  ifndef PNG_NO_READ_USER_TRANSFORM
    00523 #    define PNG_READ_USER_TRANSFORM_SUPPORTED
    00524 #  endif
    00525 #  ifndef PNG_NO_READ_RGB_TO_GRAY
    00526 #    define PNG_READ_RGB_TO_GRAY_SUPPORTED
    00527 #  endif
    00528 #endif /* PNG_READ_TRANSFORMS_SUPPORTED */
    00529
    00530 #if !defined(PNG_NO_PROGRESSIVE_READ) && \
    00531  !defined(PNG_PROGRESSIVE_READ_NOT_SUPPORTED)  /* if you don't do progressive */
    00532 #  define PNG_PROGRESSIVE_READ_SUPPORTED     /* reading.  This is not talking */
    00533 #endif                               /* about interlacing capability!  You'll */
    00534               /* still have interlacing unless you change the following line: */
    00535
    00536 #define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */
    00537
    00538 #ifndef PNG_NO_READ_COMPOSITE_NODIV
    00539 #  ifndef PNG_NO_READ_COMPOSITED_NODIV  /* libpng-1.0.x misspelling */
    00540 #    define PNG_READ_COMPOSITE_NODIV_SUPPORTED   /* well tested on Intel, SGI */
    00541 #  endif
    00542 #endif
    00543
    00544 /* Deprecated, will be removed from version 2.0.0.
    00545    Use PNG_MNG_FEATURES_SUPPORTED instead. */
    00546 #ifndef PNG_NO_READ_EMPTY_PLTE
    00547 #  define PNG_READ_EMPTY_PLTE_SUPPORTED
    00548 #endif
    00549
    00550 #endif /* PNG_READ_SUPPORTED */
    00551
    00552 #if defined(PNG_WRITE_SUPPORTED)
    00553
    00554 # if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \
    00555     !defined(PNG_NO_WRITE_TRANSFORMS)
    00556 #  define PNG_WRITE_TRANSFORMS_SUPPORTED
    00557 #endif
    00558
    00559 #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
    00560 #  ifndef PNG_NO_WRITE_SHIFT
    00561 #    define PNG_WRITE_SHIFT_SUPPORTED
    00562 #  endif
    00563 #  ifndef PNG_NO_WRITE_PACK
    00564 #    define PNG_WRITE_PACK_SUPPORTED
    00565 #  endif
    00566 #  ifndef PNG_NO_WRITE_BGR
    00567 #    define PNG_WRITE_BGR_SUPPORTED
    00568 #  endif
    00569 #  ifndef PNG_NO_WRITE_SWAP
    00570 #    define PNG_WRITE_SWAP_SUPPORTED
    00571 #  endif
    00572 #  ifndef PNG_NO_WRITE_PACKSWAP
    00573 #    define PNG_WRITE_PACKSWAP_SUPPORTED
    00574 #  endif
    00575 #  ifndef PNG_NO_WRITE_INVERT
    00576 #    define PNG_WRITE_INVERT_SUPPORTED
    00577 #  endif
    00578 #  ifndef PNG_NO_WRITE_FILLER
    00579 #    define PNG_WRITE_FILLER_SUPPORTED   /* same as WRITE_STRIP_ALPHA */
    00580 #  endif
    00581 #  ifndef PNG_NO_WRITE_SWAP_ALPHA
    00582 #    define PNG_WRITE_SWAP_ALPHA_SUPPORTED
    00583 #  endif
    00584 #  ifndef PNG_NO_WRITE_INVERT_ALPHA
    00585 #    define PNG_WRITE_INVERT_ALPHA_SUPPORTED
    00586 #  endif
    00587 #  ifndef PNG_NO_WRITE_USER_TRANSFORM
    00588 #    define PNG_WRITE_USER_TRANSFORM_SUPPORTED
    00589 #  endif
    00590 #endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */
    00591
    00592 #define PNG_WRITE_INTERLACING_SUPPORTED  /* not required for PNG-compliant
    00593                                             encoders, but can cause trouble
    00594                                             if left undefined */
    00595
    00596 #if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \
    00597      defined(PNG_FLOATING_POINT_SUPPORTED)
    00598 #  define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
    00599 #endif
    00600
    00601 #ifndef PNG_NO_WRITE_FLUSH
    00602 #  define PNG_WRITE_FLUSH_SUPPORTED
    00603 #endif
    00604
    00605 /* Deprecated, see PNG_MNG_FEATURES_SUPPORTED, above */
    00606 #ifndef PNG_NO_WRITE_EMPTY_PLTE
    00607 #  define PNG_WRITE_EMPTY_PLTE_SUPPORTED
    00608 #endif
    00609
    00610 #endif /* PNG_WRITE_SUPPORTED */
    00611
    00612 #ifndef PNG_1_0_X
    00613 #  ifndef PNG_NO_ERROR_NUMBERS
    00614 #    define PNG_ERROR_NUMBERS_SUPPORTED
    00615 #  endif
    00616 #endif /* PNG_1_0_X */
    00617
    00618 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
    00619     defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
    00620 #  ifndef PNG_NO_USER_TRANSFORM_PTR
    00621 #    define PNG_USER_TRANSFORM_PTR_SUPPORTED
    00622 #  endif
    00623 #endif
    00624
    00625 #ifndef PNG_NO_STDIO
    00626 #  define PNG_TIME_RFC1123_SUPPORTED
    00627 #endif
    00628
    00629 /* This adds extra functions in pngget.c for accessing data from the
    00630  * info pointer (added in version 0.99)
    00631  * png_get_image_width()
    00632  * png_get_image_height()
    00633  * png_get_bit_depth()
    00634  * png_get_color_type()
    00635  * png_get_compression_type()
    00636  * png_get_filter_type()
    00637  * png_get_interlace_type()
    00638  * png_get_pixel_aspect_ratio()
    00639  * png_get_pixels_per_meter()
    00640  * png_get_x_offset_pixels()
    00641  * png_get_y_offset_pixels()
    00642  * png_get_x_offset_microns()
    00643  * png_get_y_offset_microns()
    00644  */
    00645 #if !defined(PNG_NO_EASY_ACCESS) && !defined(PNG_EASY_ACCESS_SUPPORTED)
    00646 #  define PNG_EASY_ACCESS_SUPPORTED
    00647 #endif
    00648
    00649 /* PNG_ASSEMBLER_CODE was enabled by default in version 1.2.0
    00650    even when PNG_USE_PNGVCRD or PNG_USE_PNGGCCRD is not defined */
    00651 #if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_ASSEMBLER_CODE)
    00652 #  ifndef PNG_ASSEMBLER_CODE_SUPPORTED
    00653 #    define PNG_ASSEMBLER_CODE_SUPPORTED
    00654 #  endif
    00655 #  if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
    00656 #    define PNG_MMX_CODE_SUPPORTED
    00657 #  endif
    00658 #endif
    00659
    00660 /* If you are sure that you don't need thread safety and you are compiling
    00661    with PNG_USE_PNGCCRD for an MMX application, you can define this for
    00662    faster execution.  See pnggccrd.c.
    00663 #define PNG_THREAD_UNSAFE_OK
    00664 */
    00665
    00666 #if !defined(PNG_1_0_X)
    00667 #if !defined(PNG_NO_USER_MEM) && !defined(PNG_USER_MEM_SUPPORTED)
    00668 #  define PNG_USER_MEM_SUPPORTED
    00669 #endif
    00670 #endif /* PNG_1_0_X */
    00671
    00672 /* Added at libpng-1.2.6 */
    00673 #if !defined(PNG_1_0_X)
    00674 #ifndef PNG_SET_USER_LIMITS_SUPPORTED
    00675 #if !defined(PNG_NO_SET_USER_LIMITS) && !defined(PNG_SET_USER_LIMITS_SUPPORTED)
    00676 #  define PNG_SET_USER_LIMITS_SUPPORTED
    00677 #endif
    00678 #endif
    00679 #endif /* PNG_1_0_X */
    00680
    00681 /* Added at libpng-1.0.16 and 1.2.6.  To accept all valid PNGS no matter
    00682  * how large, set these limits to 0x7fffffffL
    00683  */
    00684 #ifndef PNG_USER_WIDTH_MAX
    00685 #  define PNG_USER_WIDTH_MAX 1000000L
    00686 #endif
    00687 #ifndef PNG_USER_HEIGHT_MAX
    00688 #  define PNG_USER_HEIGHT_MAX 1000000L
    00689 #endif
    00690
    00691 /* These are currently experimental features, define them if you want */
    00692
    00693 /* very little testing */
    00694 /*
    00695 #ifdef PNG_READ_SUPPORTED
    00696 #  ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
    00697 #    define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
    00698 #  endif
    00699 #endif
    00700 */
    00701
    00702 /* This is only for PowerPC big-endian and 680x0 systems */
    00703 /* some testing */
    00704 /*
    00705 #ifndef PNG_READ_BIG_ENDIAN_SUPPORTED
    00706 #  define PNG_READ_BIG_ENDIAN_SUPPORTED
    00707 #endif
    00708 */
    00709
    00710 /* Buggy compilers (e.g., gcc 2.7.2.2) need this */
    00711 /*
    00712 #define PNG_NO_POINTER_INDEXING
    00713 */
    00714
    00715 /* These functions are turned off by default, as they will be phased out. */
    00716 /*
    00717 #define  PNG_USELESS_TESTS_SUPPORTED
    00718 #define  PNG_CORRECT_PALETTE_SUPPORTED
    00719 */
    00720
    00721 /* Any chunks you are not interested in, you can undef here.  The
    00722  * ones that allocate memory may be expecially important (hIST,
    00723  * tEXt, zTXt, tRNS, pCAL).  Others will just save time and make png_info
    00724  * a bit smaller.
    00725  */
    00726
    00727 #if defined(PNG_READ_SUPPORTED) && \
    00728     !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
    00729     !defined(PNG_NO_READ_ANCILLARY_CHUNKS)
    00730 #  define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
    00731 #endif
    00732
    00733 #if defined(PNG_WRITE_SUPPORTED) && \
    00734     !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
    00735     !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS)
    00736 #  define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
    00737 #endif
    00738
    00739 #ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
    00740
    00741 #ifdef PNG_NO_READ_TEXT
    00742 #  define PNG_NO_READ_iTXt
    00743 #  define PNG_NO_READ_tEXt
    00744 #  define PNG_NO_READ_zTXt
    00745 #endif
    00746 #ifndef PNG_NO_READ_bKGD
    00747 #  define PNG_READ_bKGD_SUPPORTED
    00748 #  define PNG_bKGD_SUPPORTED
    00749 #endif
    00750 #ifndef PNG_NO_READ_cHRM
    00751 #  define PNG_READ_cHRM_SUPPORTED
    00752 #  define PNG_cHRM_SUPPORTED
    00753 #endif
    00754 #ifndef PNG_NO_READ_gAMA
    00755 #  define PNG_READ_gAMA_SUPPORTED
    00756 #  define PNG_gAMA_SUPPORTED
    00757 #endif
    00758 #ifndef PNG_NO_READ_hIST
    00759 #  define PNG_READ_hIST_SUPPORTED
    00760 #  define PNG_hIST_SUPPORTED
    00761 #endif
    00762 #ifndef PNG_NO_READ_iCCP
    00763 #  define PNG_READ_iCCP_SUPPORTED
    00764 #  define PNG_iCCP_SUPPORTED
    00765 #endif
    00766 #ifndef PNG_NO_READ_iTXt
    00767 #  ifndef PNG_READ_iTXt_SUPPORTED
    00768 #    define PNG_READ_iTXt_SUPPORTED
    00769 #  endif
    00770 #  ifndef PNG_iTXt_SUPPORTED
    00771 #    define PNG_iTXt_SUPPORTED
    00772 #  endif
    00773 #endif
    00774 #ifndef PNG_NO_READ_oFFs
    00775 #  define PNG_READ_oFFs_SUPPORTED
    00776 #  define PNG_oFFs_SUPPORTED
    00777 #endif
    00778 #ifndef PNG_NO_READ_pCAL
    00779 #  define PNG_READ_pCAL_SUPPORTED
    00780 #  define PNG_pCAL_SUPPORTED
    00781 #endif
    00782 #ifndef PNG_NO_READ_sCAL
    00783 #  define PNG_READ_sCAL_SUPPORTED
    00784 #  define PNG_sCAL_SUPPORTED
    00785 #endif
    00786 #ifndef PNG_NO_READ_pHYs
    00787 #  define PNG_READ_pHYs_SUPPORTED
    00788 #  define PNG_pHYs_SUPPORTED
    00789 #endif
    00790 #ifndef PNG_NO_READ_sBIT
    00791 #  define PNG_READ_sBIT_SUPPORTED
    00792 #  define PNG_sBIT_SUPPORTED
    00793 #endif
    00794 #ifndef PNG_NO_READ_sPLT
    00795 #  define PNG_READ_sPLT_SUPPORTED
    00796 #  define PNG_sPLT_SUPPORTED
    00797 #endif
    00798 #ifndef PNG_NO_READ_sRGB
    00799 #  define PNG_READ_sRGB_SUPPORTED
    00800 #  define PNG_sRGB_SUPPORTED
    00801 #endif
    00802 #ifndef PNG_NO_READ_tEXt
    00803 #  define PNG_READ_tEXt_SUPPORTED
    00804 #  define PNG_tEXt_SUPPORTED
    00805 #endif
    00806 #ifndef PNG_NO_READ_tIME
    00807 #  define PNG_READ_tIME_SUPPORTED
    00808 #  define PNG_tIME_SUPPORTED
    00809 #endif
    00810 #ifndef PNG_NO_READ_tRNS
    00811 #  define PNG_READ_tRNS_SUPPORTED
    00812 #  define PNG_tRNS_SUPPORTED
    00813 #endif
    00814 #ifndef PNG_NO_READ_zTXt
    00815 #  define PNG_READ_zTXt_SUPPORTED
    00816 #  define PNG_zTXt_SUPPORTED
    00817 #endif
    00818 #ifndef PNG_NO_READ_UNKNOWN_CHUNKS
    00819 #  define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
    00820 #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
    00821 #    define PNG_UNKNOWN_CHUNKS_SUPPORTED
    00822 #  endif
    00823 #  ifndef PNG_NO_HANDLE_AS_UNKNOWN
    00824 #    define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
    00825 #  endif
    00826 #endif
    00827 #if !defined(PNG_NO_READ_USER_CHUNKS) && \
    00828      defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
    00829 #  define PNG_READ_USER_CHUNKS_SUPPORTED
    00830 #  define PNG_USER_CHUNKS_SUPPORTED
    00831 #  ifdef PNG_NO_READ_UNKNOWN_CHUNKS
    00832 #    undef PNG_NO_READ_UNKNOWN_CHUNKS
    00833 #  endif
    00834 #  ifdef PNG_NO_HANDLE_AS_UNKNOWN
    00835 #    undef PNG_NO_HANDLE_AS_UNKNOWN
    00836 #  endif
    00837 #endif
    00838 #ifndef PNG_NO_READ_OPT_PLTE
    00839 #  define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */
    00840 #endif                      /* optional PLTE chunk in RGB and RGBA images */
    00841 #if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \
    00842     defined(PNG_READ_zTXt_SUPPORTED)
    00843 #  define PNG_READ_TEXT_SUPPORTED
    00844 #  define PNG_TEXT_SUPPORTED
    00845 #endif
    00846
    00847 #endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */
    00848
    00849 #ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
    00850
    00851 #ifdef PNG_NO_WRITE_TEXT
    00852 #  define PNG_NO_WRITE_iTXt
    00853 #  define PNG_NO_WRITE_tEXt
    00854 #  define PNG_NO_WRITE_zTXt
    00855 #endif
    00856 #ifndef PNG_NO_WRITE_bKGD
    00857 #  define PNG_WRITE_bKGD_SUPPORTED
    00858 #  ifndef PNG_bKGD_SUPPORTED
    00859 #    define PNG_bKGD_SUPPORTED
    00860 #  endif
    00861 #endif
    00862 #ifndef PNG_NO_WRITE_cHRM
    00863 #  define PNG_WRITE_cHRM_SUPPORTED
    00864 #  ifndef PNG_cHRM_SUPPORTED
    00865 #    define PNG_cHRM_SUPPORTED
    00866 #  endif
    00867 #endif
    00868 #ifndef PNG_NO_WRITE_gAMA
    00869 #  define PNG_WRITE_gAMA_SUPPORTED
    00870 #  ifndef PNG_gAMA_SUPPORTED
    00871 #    define PNG_gAMA_SUPPORTED
    00872 #  endif
    00873 #endif
    00874 #ifndef PNG_NO_WRITE_hIST
    00875 #  define PNG_WRITE_hIST_SUPPORTED
    00876 #  ifndef PNG_hIST_SUPPORTED
    00877 #    define PNG_hIST_SUPPORTED
    00878 #  endif
    00879 #endif
    00880 #ifndef PNG_NO_WRITE_iCCP
    00881 #  define PNG_WRITE_iCCP_SUPPORTED
    00882 #  ifndef PNG_iCCP_SUPPORTED
    00883 #    define PNG_iCCP_SUPPORTED
    00884 #  endif
    00885 #endif
    00886 #ifndef PNG_NO_WRITE_iTXt
    00887 #  ifndef PNG_WRITE_iTXt_SUPPORTED
    00888 #    define PNG_WRITE_iTXt_SUPPORTED
    00889 #  endif
    00890 #  ifndef PNG_iTXt_SUPPORTED
    00891 #    define PNG_iTXt_SUPPORTED
    00892 #  endif
    00893 #endif
    00894 #ifndef PNG_NO_WRITE_oFFs
    00895 #  define PNG_WRITE_oFFs_SUPPORTED
    00896 #  ifndef PNG_oFFs_SUPPORTED
    00897 #    define PNG_oFFs_SUPPORTED
    00898 #  endif
    00899 #endif
    00900 #ifndef PNG_NO_WRITE_pCAL
    00901 #  define PNG_WRITE_pCAL_SUPPORTED
    00902 #  ifndef PNG_pCAL_SUPPORTED
    00903 #    define PNG_pCAL_SUPPORTED
    00904 #  endif
    00905 #endif
    00906 #ifndef PNG_NO_WRITE_sCAL
    00907 #  define PNG_WRITE_sCAL_SUPPORTED
    00908 #  ifndef PNG_sCAL_SUPPORTED
    00909 #    define PNG_sCAL_SUPPORTED
    00910 #  endif
    00911 #endif
    00912 #ifndef PNG_NO_WRITE_pHYs
    00913 #  define PNG_WRITE_pHYs_SUPPORTED
    00914 #  ifndef PNG_pHYs_SUPPORTED
    00915 #    define PNG_pHYs_SUPPORTED
    00916 #  endif
    00917 #endif
    00918 #ifndef PNG_NO_WRITE_sBIT
    00919 #  define PNG_WRITE_sBIT_SUPPORTED
    00920 #  ifndef PNG_sBIT_SUPPORTED
    00921 #    define PNG_sBIT_SUPPORTED
    00922 #  endif
    00923 #endif
    00924 #ifndef PNG_NO_WRITE_sPLT
    00925 #  define PNG_WRITE_sPLT_SUPPORTED
    00926 #  ifndef PNG_sPLT_SUPPORTED
    00927 #    define PNG_sPLT_SUPPORTED
    00928 #  endif
    00929 #endif
    00930 #ifndef PNG_NO_WRITE_sRGB
    00931 #  define PNG_WRITE_sRGB_SUPPORTED
    00932 #  ifndef PNG_sRGB_SUPPORTED
    00933 #    define PNG_sRGB_SUPPORTED
    00934 #  endif
    00935 #endif
    00936 #ifndef PNG_NO_WRITE_tEXt
    00937 #  define PNG_WRITE_tEXt_SUPPORTED
    00938 #  ifndef PNG_tEXt_SUPPORTED
    00939 #    define PNG_tEXt_SUPPORTED
    00940 #  endif
    00941 #endif
    00942 #ifndef PNG_NO_WRITE_tIME
    00943 #  define PNG_WRITE_tIME_SUPPORTED
    00944 #  ifndef PNG_tIME_SUPPORTED
    00945 #    define PNG_tIME_SUPPORTED
    00946 #  endif
    00947 #endif
    00948 #ifndef PNG_NO_WRITE_tRNS
    00949 #  define PNG_WRITE_tRNS_SUPPORTED
    00950 #  ifndef PNG_tRNS_SUPPORTED
    00951 #    define PNG_tRNS_SUPPORTED
    00952 #  endif
    00953 #endif
    00954 #ifndef PNG_NO_WRITE_zTXt
    00955 #  define PNG_WRITE_zTXt_SUPPORTED
    00956 #  ifndef PNG_zTXt_SUPPORTED
    00957 #    define PNG_zTXt_SUPPORTED
    00958 #  endif
    00959 #endif
    00960 #ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS
    00961 #  define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
    00962 #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
    00963 #    define PNG_UNKNOWN_CHUNKS_SUPPORTED
    00964 #  endif
    00965 #  ifndef PNG_NO_HANDLE_AS_UNKNOWN
    00966 #     ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
    00967 #       define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
    00968 #     endif
    00969 #  endif
    00970 #endif
    00971 #if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
    00972     defined(PNG_WRITE_zTXt_SUPPORTED)
    00973 #  define PNG_WRITE_TEXT_SUPPORTED
    00974 #  ifndef PNG_TEXT_SUPPORTED
    00975 #    define PNG_TEXT_SUPPORTED
    00976 #  endif
    00977 #endif
    00978
    00979 #endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */
    00980
    00981 /* Turn this off to disable png_read_png() and
    00982  * png_write_png() and leave the row_pointers member
    00983  * out of the info structure.
    00984  */
    00985 #ifndef PNG_NO_INFO_IMAGE
    00986 #  define PNG_INFO_IMAGE_SUPPORTED
    00987 #endif
    00988
    00989 /* need the time information for reading tIME chunks */
    00990 #if defined(PNG_tIME_SUPPORTED)
    00991 #  if !defined(_WIN32_WCE)
    00992      /* "time.h" functions are not supported on WindowsCE */
    00993 #    include <time.h>
    00994 #  endif
    00995 #endif
    00996
    00997 /* Some typedefs to get us started.  These should be safe on most of the
    00998  * common platforms.  The typedefs should be at least as large as the
    00999  * numbers suggest (a png_uint_32 must be at least 32 bits long), but they
    01000  * don't have to be exactly that size.  Some compilers dislike passing
    01001  * unsigned shorts as function parameters, so you may be better off using
    01002  * unsigned int for png_uint_16.  Likewise, for 64-bit systems, you may
    01003  * want to have unsigned int for png_uint_32 instead of unsigned long.
    01004  */
    01005
    01006 typedef unsigned long png_uint_32;
    01007 typedef long png_int_32;
    01008 typedef unsigned short png_uint_16;
    01009 typedef short png_int_16;
    01010 typedef unsigned char png_byte;
    01011
    01012 /* This is usually size_t.  It is typedef'ed just in case you need it to
    01013    change (I'm not sure if you will or not, so I thought I'd be safe) */
    01014 #ifdef PNG_SIZE_T
    01015    typedef PNG_SIZE_T png_size_t;
    01016 #  define png_sizeof(x) png_convert_size(sizeof (x))
    01017 #else
    01018    typedef size_t png_size_t;
    01019 #  define png_sizeof(x) sizeof (x)
    01020 #endif
    01021
    01022 /* The following is needed for medium model support.  It cannot be in the
    01023  * PNG_INTERNAL section.  Needs modification for other compilers besides
    01024  * MSC.  Model independent support declares all arrays and pointers to be
    01025  * large using the far keyword.  The zlib version used must also support
    01026  * model independent data.  As of version zlib 1.0.4, the necessary changes
    01027  * have been made in zlib.  The USE_FAR_KEYWORD define triggers other
    01028  * changes that are needed. (Tim Wegner)
    01029  */
    01030
    01031 /* Separate compiler dependencies (problem here is that zlib.h always
    01032    defines FAR. (SJT) */
    01033 #ifdef __BORLANDC__
    01034 #  if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)
    01035 #    define LDATA 1
    01036 #  else
    01037 #    define LDATA 0
    01038 #  endif
    01039    /* GRR:  why is Cygwin in here?  Cygwin is not Borland C... */
    01040 #  if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)
    01041 #    define PNG_MAX_MALLOC_64K
    01042 #    if (LDATA != 1)
    01043 #      ifndef FAR
    01044 #        define FAR __far
    01045 #      endif
    01046 #      define USE_FAR_KEYWORD
    01047 #    endif   /* LDATA != 1 */
    01048      /* Possibly useful for moving data out of default segment.
    01049       * Uncomment it if you want. Could also define FARDATA as
    01050       * const if your compiler supports it. (SJT)
    01051 #    define FARDATA FAR
    01052       */
    01053 #  endif  /* __WIN32__, __FLAT__, __CYGWIN__ */
    01054 #endif   /* __BORLANDC__ */
    01055
    01056
    01057 /* Suggest testing for specific compiler first before testing for
    01058  * FAR.  The Watcom compiler defines both __MEDIUM__ and M_I86MM,
    01059  * making reliance oncertain keywords suspect. (SJT)
    01060  */
    01061
    01062 /* MSC Medium model */
    01063 #if defined(FAR)
    01064 #  if defined(M_I86MM)
    01065 #    define USE_FAR_KEYWORD
    01066 #    define FARDATA FAR
    01067 #    include <dos.h>
    01068 #  endif
    01069 #endif
    01070
    01071 /* SJT: default case */
    01072 #ifndef FAR
    01073 #  define FAR
    01074 #endif
    01075
    01076 /* At this point FAR is always defined */
    01077 #ifndef FARDATA
    01078 #  define FARDATA
    01079 #endif
    01080
    01081 /* Typedef for floating-point numbers that are converted
    01082    to fixed-point with a multiple of 100,000, e.g., int_gamma */
    01083 typedef png_int_32 png_fixed_point;
    01084
    01085 /* Add typedefs for pointers */
    01086 typedef void            FAR * png_voidp;
    01087 typedef png_byte        FAR * png_bytep;
    01088 typedef png_uint_32     FAR * png_uint_32p;
    01089 typedef png_int_32      FAR * png_int_32p;
    01090 typedef png_uint_16     FAR * png_uint_16p;
    01091 typedef png_int_16      FAR * png_int_16p;
    01092 typedef PNG_CONST char  FAR * png_const_charp;
    01093 typedef char            FAR * png_charp;
    01094 typedef png_fixed_point FAR * png_fixed_point_p;
    01095
    01096 #ifndef PNG_NO_STDIO
    01097 #if defined(_WIN32_WCE)
    01098 typedef HANDLE                png_FILE_p;
    01099 #else
    01100 typedef FILE                * png_FILE_p;
    01101 #endif
    01102 #endif
    01103
    01104 #ifdef PNG_FLOATING_POINT_SUPPORTED
    01105 typedef double          FAR * png_doublep;
    01106 #endif
    01107
    01108 /* Pointers to pointers; i.e. arrays */
    01109 typedef png_byte        FAR * FAR * png_bytepp;
    01110 typedef png_uint_32     FAR * FAR * png_uint_32pp;
    01111 typedef png_int_32      FAR * FAR * png_int_32pp;
    01112 typedef png_uint_16     FAR * FAR * png_uint_16pp;
    01113 typedef png_int_16      FAR * FAR * png_int_16pp;
    01114 typedef PNG_CONST char  FAR * FAR * png_const_charpp;
    01115 typedef char            FAR * FAR * png_charpp;
    01116 typedef png_fixed_point FAR * FAR * png_fixed_point_pp;
    01117 #ifdef PNG_FLOATING_POINT_SUPPORTED
    01118 typedef double          FAR * FAR * png_doublepp;
    01119 #endif
    01120
    01121 /* Pointers to pointers to pointers; i.e., pointer to array */
    01122 typedef char            FAR * FAR * FAR * png_charppp;
    01123
    01124 /* libpng typedefs for types in zlib. If zlib changes
    01125  * or another compression library is used, then change these.
    01126  * Eliminates need to change all the source files.
    01127  */
    01128 typedef charf *         png_zcharp;
    01129 typedef charf * FAR *   png_zcharpp;
    01130 typedef z_stream FAR *  png_zstreamp;
    01131
    01132 /*
    01133  * Define PNG_BUILD_DLL if the module being built is a Windows
    01134  * LIBPNG DLL.
    01135  *
    01136  * Define PNG_USE_DLL if you want to *link* to the Windows LIBPNG DLL.
    01137  * It is equivalent to Microsoft predefined macro _DLL that is
    01138  * automatically defined when you compile using the share
    01139  * version of the CRT (C Run-Time library)
    01140  *
    01141  * The cygwin mods make this behavior a little different:
    01142  * Define PNG_BUILD_DLL if you are building a dll for use with cygwin
    01143  * Define PNG_STATIC if you are building a static library for use with cygwin,
    01144  *   -or- if you are building an application that you want to link to the
    01145  *   static library.
    01146  * PNG_USE_DLL is defined by default (no user action needed) unless one of
    01147  *   the other flags is defined.
    01148  */
    01149
    01150 #if !defined(PNG_DLL) && (defined(PNG_BUILD_DLL) || defined(PNG_USE_DLL))
    01151 #  define PNG_DLL
    01152 #endif
    01153 /* If CYGWIN, then disallow GLOBAL ARRAYS unless building a static lib.
    01154  * When building a static lib, default to no GLOBAL ARRAYS, but allow
    01155  * command-line override
    01156  */
    01157 #if defined(__CYGWIN__)
    01158 #  if !defined(PNG_STATIC)
    01159 #    if defined(PNG_USE_GLOBAL_ARRAYS)
    01160 #      undef PNG_USE_GLOBAL_ARRAYS
    01161 #    endif
    01162 #    if !defined(PNG_USE_LOCAL_ARRAYS)
    01163 #      define PNG_USE_LOCAL_ARRAYS
    01164 #    endif
    01165 #  else
    01166 #    if defined(PNG_USE_LOCAL_ARRAYS) || defined(PNG_NO_GLOBAL_ARRAYS)
    01167 #      if defined(PNG_USE_GLOBAL_ARRAYS)
    01168 #        undef PNG_USE_GLOBAL_ARRAYS
    01169 #      endif
    01170 #    endif
    01171 #  endif
    01172 #  if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
    01173 #    define PNG_USE_LOCAL_ARRAYS
    01174 #  endif
    01175 #endif
    01176
    01177 /* Do not use global arrays (helps with building DLL's)
    01178  * They are no longer used in libpng itself, since version 1.0.5c,
    01179  * but might be required for some pre-1.0.5c applications.
    01180  */
    01181 #if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
    01182 #  if defined(PNG_NO_GLOBAL_ARRAYS) || (defined(__GNUC__) && defined(PNG_DLL))
    01183 #    define PNG_USE_LOCAL_ARRAYS
    01184 #  else
    01185 #    define PNG_USE_GLOBAL_ARRAYS
    01186 #  endif
    01187 #endif
    01188
    01189 #if defined(__CYGWIN__)
    01190 #  undef PNGAPI
    01191 #  define PNGAPI __cdecl
    01192 #  undef PNG_IMPEXP
    01193 #  define PNG_IMPEXP
    01194 #endif
    01195
    01196 /* If you define PNGAPI, e.g., with compiler option "-DPNGAPI=__stdcall",
    01197  * you may get warnings regarding the linkage of png_zalloc and png_zfree.
    01198  * Don't ignore those warnings; you must also reset the default calling
    01199  * convention in your compiler to match your PNGAPI, and you must build
    01200  * zlib and your applications the same way you build libpng.
    01201  */
    01202
    01203 #if defined(__MINGW32__) && !defined(PNG_MODULEDEF)
    01204 #  ifndef PNG_NO_MODULEDEF
    01205 #    define PNG_NO_MODULEDEF
    01206 #  endif
    01207 #endif
    01208
    01209 #if !defined(PNG_IMPEXP) && defined(PNG_BUILD_DLL) && !defined(PNG_NO_MODULEDEF)
    01210 #  define PNG_IMPEXP
    01211 #endif
    01212
    01213 #if defined(PNG_DLL) || defined(_DLL) || defined(__DLL__ ) || \
    01214     (( defined(_Windows) || defined(_WINDOWS) || \
    01215        defined(WIN32) || defined(_WIN32) || defined(__WIN32__) ))
    01216
    01217 #  ifndef PNGAPI
    01218 #     if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
    01219 #        define PNGAPI __cdecl
    01220 #     else
    01221 #        define PNGAPI _cdecl
    01222 #     endif
    01223 #  endif
    01224
    01225 #  if !defined(PNG_IMPEXP) && (!defined(PNG_DLL) || \
    01226        0 /* WINCOMPILER_WITH_NO_SUPPORT_FOR_DECLIMPEXP */)
    01227 #     define PNG_IMPEXP
    01228 #  endif
    01229
    01230 #  if !defined(PNG_IMPEXP)
    01231
    01232 #     define PNG_EXPORT_TYPE1(type,symbol)  PNG_IMPEXP type PNGAPI symbol
    01233 #     define PNG_EXPORT_TYPE2(type,symbol)  type PNG_IMPEXP PNGAPI symbol
    01234
    01235       /* Borland/Microsoft */
    01236 #     if defined(_MSC_VER) || defined(__BORLANDC__)
    01237 #        if (_MSC_VER >= 800) || (__BORLANDC__ >= 0x500)
    01238 #           define PNG_EXPORT PNG_EXPORT_TYPE1
    01239 #        else
    01240 #           define PNG_EXPORT PNG_EXPORT_TYPE2
    01241 #           if defined(PNG_BUILD_DLL)
    01242 #              define PNG_IMPEXP __export
    01243 #           else
    01244 #              define PNG_IMPEXP /*__import */ /* doesn't exist AFAIK in
    01245                                                  VC++ */
    01246 #           endif                             /* Exists in Borland C++ for
    01247                                                  C++ classes (== huge) */
    01248 #        endif
    01249 #     endif
    01250
    01251 #     if !defined(PNG_IMPEXP)
    01252 #        if defined(PNG_BUILD_DLL)
    01253 #           define PNG_IMPEXP __declspec(dllexport)
    01254 #        else
    01255 #           define PNG_IMPEXP __declspec(dllimport)
    01256 #        endif
    01257 #     endif
    01258 #  endif  /* PNG_IMPEXP */
    01259 #else /* !(DLL || non-cygwin WINDOWS) */
    01260 #   if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
    01261 #      ifndef PNGAPI
    01262 #         define PNGAPI _System
    01263 #      endif
    01264 #   else
    01265 #      if 0 /* ... other platforms, with other meanings */
    01266 #      endif
    01267 #   endif
    01268 #endif
    01269
    01270 #ifndef PNGAPI
    01271 #  define PNGAPI
    01272 #endif
    01273 #ifndef PNG_IMPEXP
    01274 #  define PNG_IMPEXP
    01275 #endif
    01276
    01277 #ifndef PNG_EXPORT
    01278 #  define PNG_EXPORT(type,symbol) PNG_IMPEXP type PNGAPI symbol
    01279 #endif
    01280
    01281 #ifdef PNG_USE_GLOBAL_ARRAYS
    01282 #  ifndef PNG_EXPORT_VAR
    01283 #    define PNG_EXPORT_VAR(type) extern PNG_IMPEXP type
    01284 #  endif
    01285 #endif
    01286
    01287 /* User may want to use these so they are not in PNG_INTERNAL. Any library
    01288  * functions that are passed far data must be model independent.
    01289  */
    01290
    01291 #ifndef PNG_ABORT
    01292 #  define PNG_ABORT() abort()
    01293 #endif
    01294
    01295 #ifdef PNG_SETJMP_SUPPORTED
    01296 #  define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf)
    01297 #else
    01298 #  define png_jmpbuf(png_ptr) \
    01299    (LIBPNG_WAS_COMPILED_WITH__PNG_SETJMP_NOT_SUPPORTED)
    01300 #endif
    01301
    01302 #if defined(USE_FAR_KEYWORD)  /* memory model independent fns */
    01303 /* use this to make far-to-near assignments */
    01304 #  define CHECK   1
    01305 #  define NOCHECK 0
    01306 #  define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK))
    01307 #  define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK))
    01308 #  define png_strcpy  _fstrcpy
    01309 #  define png_strncpy _fstrncpy   /* Added to v 1.2.6 */
    01310 #  define png_strlen  _fstrlen
    01311 #  define png_memcmp  _fmemcmp    /* SJT: added */
    01312 #  define png_memcpy  _fmemcpy
    01313 #  define png_memset  _fmemset
    01314 #else /* use the usual functions */
    01315 #  define CVT_PTR(ptr)         (ptr)
    01316 #  define CVT_PTR_NOCHECK(ptr) (ptr)
    01317 #  define png_strcpy  strcpy
    01318 #  define png_strncpy strncpy     /* Added to v 1.2.6 */
    01319 #  define png_strlen  strlen
    01320 #  define png_memcmp  memcmp      /* SJT: added */
    01321 #  define png_memcpy  memcpy
    01322 #  define png_memset  memset
    01323 #endif
    01324 /* End of memory model independent support */
    01325
    01326 /* Just a little check that someone hasn't tried to define something
    01327  * contradictory.
    01328  */
    01329 #if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K)
    01330 #  undef PNG_ZBUF_SIZE
    01331 #  define PNG_ZBUF_SIZE 65536L
    01332 #endif
    01333
    01334 #ifdef PNG_READ_SUPPORTED
    01335 /* Prior to libpng-1.0.9, this block was in pngasmrd.h */
    01336 #if defined(PNG_INTERNAL)
    01337
    01338 /* These are the default thresholds before the MMX code kicks in; if either
    01339  * rowbytes or bitdepth is below the threshold, plain C code is used.  These
    01340  * can be overridden at runtime via the png_set_mmx_thresholds() call in
    01341  * libpng 1.2.0 and later.  The values below were chosen by Intel.
    01342  */
    01343
    01344 #ifndef PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT
    01345 #  define PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT  128  /*  >=  */
    01346 #endif
    01347 #ifndef PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT
    01348 #  define PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT  9    /*  >=  */
    01349 #endif
    01350
    01351 /* Set this in the makefile for VC++ on Pentium, not here. */
    01352 /* Platform must be Pentium.  Makefile must assemble and load pngvcrd.c .
    01353  * MMX will be detected at run time and used if present.
    01354  */
    01355 #ifdef PNG_USE_PNGVCRD
    01356 #  define PNG_HAVE_ASSEMBLER_COMBINE_ROW
    01357 #  define PNG_HAVE_ASSEMBLER_READ_INTERLACE
    01358 #  define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
    01359 #endif
    01360
    01361 /* Set this in the makefile for gcc/as on Pentium, not here. */
    01362 /* Platform must be Pentium.  Makefile must assemble and load pnggccrd.c .
    01363  * MMX will be detected at run time and used if present.
    01364  */
    01365 #ifdef PNG_USE_PNGGCCRD
    01366 #  define PNG_HAVE_ASSEMBLER_COMBINE_ROW
    01367 #  define PNG_HAVE_ASSEMBLER_READ_INTERLACE
    01368 #  define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
    01369 #endif
    01370 /* - see pnggccrd.c for info about what is currently enabled */
    01371
    01372 #endif /* PNG_INTERNAL */
    01373 #endif /* PNG_READ_SUPPORTED */
    01374
    01375 #endif /* PNGCONF_H */
    01376