com32/include/pngconf.h

   1
   2 /* pngconf.h - machine configurable file for libpng
   3  *
   4  * libpng version 1.2.44 - June 26, 2010
   5  * Copyright (c) 1998-2010 Glenn Randers-Pehrson
   6  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
   7  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
   8  *
   9  * This code is released under the libpng license.
  10  * For conditions of distribution and use, see the disclaimer
  11  * and license in png.h
  12  */
  13
  14 /* Any machine specific code is near the front of this file, so if you
  15  * are configuring libpng for a machine, you may want to read the section
  16  * starting here down to where it starts to typedef png_color, png_text,
  17  * and png_info.
  18  */
  19
  20 #ifndef PNGCONF_H
  21 #define PNGCONF_H
  22
  23 #define PNG_1_2_X
  24
  25 /*
  26  * PNG_USER_CONFIG has to be defined on the compiler command line. This
  27  * includes the resource compiler for Windows DLL configurations.
  28  */
  29 #ifdef PNG_USER_CONFIG
  30 #  ifndef PNG_USER_PRIVATEBUILD
  31 #    define PNG_USER_PRIVATEBUILD
  32 #  endif
  33 #include "pngusr.h"
  34 #endif
  35
  36 /* PNG_CONFIGURE_LIBPNG is set by the "configure" script. */
  37 #ifdef PNG_CONFIGURE_LIBPNG
  38 #ifdef HAVE_CONFIG_H
  39 #include "config.h"
  40 #endif
  41 #endif
  42
  43 /*
  44  * Added at libpng-1.2.8
  45  *
  46  * If you create a private DLL you need to define in "pngusr.h" the followings:
  47  * #define PNG_USER_PRIVATEBUILD <Describes by whom and why this version of
  48  *        the DLL was built>
  49  *  e.g. #define PNG_USER_PRIVATEBUILD "Build by MyCompany for xyz reasons."
  50  * #define PNG_USER_DLLFNAME_POSTFIX <two-letter postfix that serve to
  51  *        distinguish your DLL from those of the official release. These
  52  *        correspond to the trailing letters that come after the version
  53  *        number and must match your private DLL name>
  54  *  e.g. // private DLL "libpng13gx.dll"
  55  *       #define PNG_USER_DLLFNAME_POSTFIX "gx"
  56  *
  57  * The following macros are also at your disposal if you want to complete the
  58  * DLL VERSIONINFO structure.
  59  * - PNG_USER_VERSIONINFO_COMMENTS
  60  * - PNG_USER_VERSIONINFO_COMPANYNAME
  61  * - PNG_USER_VERSIONINFO_LEGALTRADEMARKS
  62  */
  63
  64 #ifdef __STDC__
  65 #ifdef SPECIALBUILD
  66 #  pragma message("PNG_LIBPNG_SPECIALBUILD (and deprecated SPECIALBUILD)\
  67  are now LIBPNG reserved macros. Use PNG_USER_PRIVATEBUILD instead.")
  68 #endif
  69
  70 #ifdef PRIVATEBUILD
  71 # pragma message("PRIVATEBUILD is deprecated.\
  72  Use PNG_USER_PRIVATEBUILD instead.")
  73 # define PNG_USER_PRIVATEBUILD PRIVATEBUILD
  74 #endif
  75 #endif /* __STDC__ */
  76
  77 #ifndef PNG_VERSION_INFO_ONLY
  78
  79 /* End of material added to libpng-1.2.8 */
  80
  81 /* Added at libpng-1.2.19, removed at libpng-1.2.20 because it caused trouble
  82    Restored at libpng-1.2.21 */
  83 #if !defined(PNG_NO_WARN_UNINITIALIZED_ROW) && \
  84     !defined(PNG_WARN_UNINITIALIZED_ROW)
  85 #  define PNG_WARN_UNINITIALIZED_ROW 1
  86 #endif
  87 /* End of material added at libpng-1.2.19/1.2.21 */
  88
  89 /* This is the size of the compression buffer, and thus the size of
  90  * an IDAT chunk.  Make this whatever size you feel is best for your
  91  * machine.  One of these will be allocated per png_struct.  When this
  92  * is full, it writes the data to the disk, and does some other
  93  * calculations.  Making this an extremely small size will slow
  94  * the library down, but you may want to experiment to determine
  95  * where it becomes significant, if you are concerned with memory
  96  * usage.  Note that zlib allocates at least 32Kb also.  For readers,
  97  * this describes the size of the buffer available to read the data in.
  98  * Unless this gets smaller than the size of a row (compressed),
  99  * it should not make much difference how big this is.
 100  */
 101
 102 #ifndef PNG_ZBUF_SIZE
 103 #  define PNG_ZBUF_SIZE 8192
 104 #endif
 105
 106 /* Enable if you want a write-only libpng */
 107
 108 #ifndef PNG_NO_READ_SUPPORTED
 109 #  define PNG_READ_SUPPORTED
 110 #endif
 111
 112 /* Enable if you want a read-only libpng */
 113
 114 #ifndef PNG_NO_WRITE_SUPPORTED
 115 #  define PNG_WRITE_SUPPORTED
 116 #endif
 117
 118 /* Enabled in 1.2.41. */
 119 #ifdef PNG_ALLOW_BENIGN_ERRORS
 120 #  define png_benign_error png_warning
 121 #  define png_chunk_benign_error png_chunk_warning
 122 #else
 123 #  ifndef PNG_BENIGN_ERRORS_SUPPORTED
 124 #    define png_benign_error png_error
 125 #    define png_chunk_benign_error png_chunk_error
 126 #  endif
 127 #endif
 128
 129 /* Added in libpng-1.2.41 */
 130 #if !defined(PNG_NO_WARNINGS) && !defined(PNG_WARNINGS_SUPPORTED)
 131 #  define PNG_WARNINGS_SUPPORTED
 132 #endif
 133
 134 #if !defined(PNG_NO_ERROR_TEXT) && !defined(PNG_ERROR_TEXT_SUPPORTED)
 135 #  define PNG_ERROR_TEXT_SUPPORTED
 136 #endif
 137
 138 #if !defined(PNG_NO_CHECK_cHRM) && !defined(PNG_CHECK_cHRM_SUPPORTED)
 139 #  define PNG_CHECK_cHRM_SUPPORTED
 140 #endif
 141
 142 /* Enabled by default in 1.2.0.  You can disable this if you don't need to
 143  * support PNGs that are embedded in MNG datastreams
 144  */
 145 #if !defined(PNG_1_0_X) && !defined(PNG_NO_MNG_FEATURES)
 146 #  ifndef PNG_MNG_FEATURES_SUPPORTED
 147 #    define PNG_MNG_FEATURES_SUPPORTED
 148 #  endif
 149 #endif
 150
 151 #ifndef PNG_NO_FLOATING_POINT_SUPPORTED
 152 #  ifndef PNG_FLOATING_POINT_SUPPORTED
 153 #    define PNG_FLOATING_POINT_SUPPORTED
 154 #  endif
 155 #endif
 156
 157 /* If you are running on a machine where you cannot allocate more
 158  * than 64K of memory at once, uncomment this.  While libpng will not
 159  * normally need that much memory in a chunk (unless you load up a very
 160  * large file), zlib needs to know how big of a chunk it can use, and
 161  * libpng thus makes sure to check any memory allocation to verify it
 162  * will fit into memory.
 163 #define PNG_MAX_MALLOC_64K
 164  */
 165 #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
 166 #  define PNG_MAX_MALLOC_64K
 167 #endif
 168
 169 /* Special munging to support doing things the 'cygwin' way:
 170  * 'Normal' png-on-win32 defines/defaults:
 171  *   PNG_BUILD_DLL -- building dll
 172  *   PNG_USE_DLL   -- building an application, linking to dll
 173  *   (no define)   -- building static library, or building an
 174  *                    application and linking to the static lib
 175  * 'Cygwin' defines/defaults:
 176  *   PNG_BUILD_DLL -- (ignored) building the dll
 177  *   (no define)   -- (ignored) building an application, linking to the dll
 178  *   PNG_STATIC    -- (ignored) building the static lib, or building an
 179  *                    application that links to the static lib.
 180  *   ALL_STATIC    -- (ignored) building various static libs, or building an
 181  *                    application that links to the static libs.
 182  * Thus,
 183  * a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and
 184  * this bit of #ifdefs will define the 'correct' config variables based on
 185  * that. If a cygwin user *wants* to define 'PNG_USE_DLL' that's okay, but
 186  * unnecessary.
 187  *
 188  * Also, the precedence order is:
 189  *   ALL_STATIC (since we can't #undef something outside our namespace)
 190  *   PNG_BUILD_DLL
 191  *   PNG_STATIC
 192  *   (nothing) == PNG_USE_DLL
 193  *
 194  * CYGWIN (2002-01-20): The preceding is now obsolete. With the advent
 195  *   of auto-import in binutils, we no longer need to worry about
 196  *   __declspec(dllexport) / __declspec(dllimport) and friends.  Therefore,
 197  *   we don't need to worry about PNG_STATIC or ALL_STATIC when it comes
 198  *   to __declspec() stuff.  However, we DO need to worry about
 199  *   PNG_BUILD_DLL and PNG_STATIC because those change some defaults
 200  *   such as CONSOLE_IO and whether GLOBAL_ARRAYS are allowed.
 201  */
 202 #ifdef __CYGWIN__
 203 #  ifdef ALL_STATIC
 204 #    ifdef PNG_BUILD_DLL
 205 #      undef PNG_BUILD_DLL
 206 #    endif
 207 #    ifdef PNG_USE_DLL
 208 #      undef PNG_USE_DLL
 209 #    endif
 210 #    ifdef PNG_DLL
 211 #      undef PNG_DLL
 212 #    endif
 213 #    ifndef PNG_STATIC
 214 #      define PNG_STATIC
 215 #    endif
 216 #  else
 217 #    ifdef PNG_BUILD_DLL
 218 #      ifdef PNG_STATIC
 219 #        undef PNG_STATIC
 220 #      endif
 221 #      ifdef PNG_USE_DLL
 222 #        undef PNG_USE_DLL
 223 #      endif
 224 #      ifndef PNG_DLL
 225 #        define PNG_DLL
 226 #      endif
 227 #    else
 228 #      ifdef PNG_STATIC
 229 #        ifdef PNG_USE_DLL
 230 #          undef PNG_USE_DLL
 231 #        endif
 232 #        ifdef PNG_DLL
 233 #          undef PNG_DLL
 234 #        endif
 235 #      else
 236 #        ifndef PNG_USE_DLL
 237 #          define PNG_USE_DLL
 238 #        endif
 239 #        ifndef PNG_DLL
 240 #          define PNG_DLL
 241 #        endif
 242 #      endif
 243 #    endif
 244 #  endif
 245 #endif
 246
 247 /* This protects us against compilers that run on a windowing system
 248  * and thus don't have or would rather us not use the stdio types:
 249  * stdin, stdout, and stderr.  The only one currently used is stderr
 250  * in png_error() and png_warning().  #defining PNG_NO_CONSOLE_IO will
 251  * prevent these from being compiled and used. #defining PNG_NO_STDIO
 252  * will also prevent these, plus will prevent the entire set of stdio
 253  * macros and functions (FILE *, printf, etc.) from being compiled and used,
 254  * unless (PNG_DEBUG > 0) has been #defined.
 255  *
 256  * #define PNG_NO_CONSOLE_IO
 257  * #define PNG_NO_STDIO
 258  */
 259
 260 #if !defined(PNG_NO_STDIO) && !defined(PNG_STDIO_SUPPORTED)
 261 #  define PNG_STDIO_SUPPORTED
 262 #endif
 263
 264 #ifdef _WIN32_WCE
 265 #  include <windows.h>
 266    /* Console I/O functions are not supported on WindowsCE */
 267 #  define PNG_NO_CONSOLE_IO
 268    /* abort() may not be supported on some/all Windows CE platforms */
 269 #  define PNG_ABORT() exit(-1)
 270 #  ifdef PNG_DEBUG
 271 #    undef PNG_DEBUG
 272 #  endif
 273 #endif
 274
 275 #ifdef PNG_BUILD_DLL
 276 #  ifndef PNG_CONSOLE_IO_SUPPORTED
 277 #    ifndef PNG_NO_CONSOLE_IO
 278 #      define PNG_NO_CONSOLE_IO
 279 #    endif
 280 #  endif
 281 #endif
 282
 283 #  ifdef PNG_NO_STDIO
 284 #    ifndef PNG_NO_CONSOLE_IO
 285 #      define PNG_NO_CONSOLE_IO
 286 #    endif
 287 #    ifdef PNG_DEBUG
 288 #      if (PNG_DEBUG > 0)
 289 #        include <stdio.h>
 290 #      endif
 291 #    endif
 292 #  else
 293 #    ifndef _WIN32_WCE
 294 /* "stdio.h" functions are not supported on WindowsCE */
 295 #      include <stdio.h>
 296 #    endif
 297 #  endif
 298
 299 #if !(defined PNG_NO_CONSOLE_IO) && !defined(PNG_CONSOLE_IO_SUPPORTED)
 300 #  define PNG_CONSOLE_IO_SUPPORTED
 301 #endif
 302
 303 /* This macro protects us against machines that don't have function
 304  * prototypes (ie K&R style headers).  If your compiler does not handle
 305  * function prototypes, define this macro and use the included ansi2knr.
 306  * I've always been able to use _NO_PROTO as the indicator, but you may
 307  * need to drag the empty declaration out in front of here, or change the
 308  * ifdef to suit your own needs.
 309  */
 310 #ifndef PNGARG
 311
 312 #ifdef OF /* zlib prototype munger */
 313 #  define PNGARG(arglist) OF(arglist)
 314 #else
 315
 316 #ifdef _NO_PROTO
 317 #  define PNGARG(arglist) ()
 318 #  ifndef PNG_TYPECAST_NULL
 319 #     define PNG_TYPECAST_NULL
 320 #  endif
 321 #else
 322 #  define PNGARG(arglist) arglist
 323 #endif /* _NO_PROTO */
 324
 325
 326 #endif /* OF */
 327
 328 #endif /* PNGARG */
 329
 330 /* Try to determine if we are compiling on a Mac.  Note that testing for
 331  * just __MWERKS__ is not good enough, because the Codewarrior is now used
 332  * on non-Mac platforms.
 333  */
 334 #ifndef MACOS
 335 #  if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
 336       defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC)
 337 #    define MACOS
 338 #  endif
 339 #endif
 340
 341 /* enough people need this for various reasons to include it here */
 342 #if !defined(MACOS) && !defined(RISCOS) && !defined(_WIN32_WCE)
 343 #  include <sys/types.h>
 344 #endif
 345
 346 #if !defined(PNG_SETJMP_NOT_SUPPORTED) && !defined(PNG_NO_SETJMP_SUPPORTED)
 347 #  define PNG_SETJMP_SUPPORTED
 348 #endif
 349
 350 #ifdef PNG_SETJMP_SUPPORTED
 351 /* This is an attempt to force a single setjmp behaviour on Linux.  If
 352  * the X config stuff didn't define _BSD_SOURCE we wouldn't need this.
 353  *
 354  * You can bypass this test if you know that your application uses exactly
 355  * the same setjmp.h that was included when libpng was built.  Only define
 356  * PNG_SKIP_SETJMP_CHECK while building your application, prior to the
 357  * application's '#include "png.h"'. Don't define PNG_SKIP_SETJMP_CHECK
 358  * while building a separate libpng library for general use.
 359  */
 360
 361 #  ifndef PNG_SKIP_SETJMP_CHECK
 362 #    ifdef __linux__
 363 #      ifdef _BSD_SOURCE
 364 #        define PNG_SAVE_BSD_SOURCE
 365 #        undef _BSD_SOURCE
 366 #      endif
 367 #      ifdef _SETJMP_H
 368        /* If you encounter a compiler error here, see the explanation
 369         * near the end of INSTALL.
 370         */
 371            __pngconf.h__ in libpng already includes setjmp.h;
 372            __dont__ include it again.;
 373 #      endif
 374 #    endif /* __linux__ */
 375 #  endif /* PNG_SKIP_SETJMP_CHECK */
 376
 377    /* include setjmp.h for error handling */
 378 #  include <setjmp.h>
 379
 380 #  ifdef __linux__
 381 #    ifdef PNG_SAVE_BSD_SOURCE
 382 #      ifndef _BSD_SOURCE
 383 #        define _BSD_SOURCE
 384 #      endif
 385 #      undef PNG_SAVE_BSD_SOURCE
 386 #    endif
 387 #  endif /* __linux__ */
 388 #endif /* PNG_SETJMP_SUPPORTED */
 389
 390 #ifdef BSD
 391 #  include <strings.h>
 392 #else
 393 #  include <string.h>
 394 #endif
 395
 396 /* Other defines for things like memory and the like can go here.  */
 397 #ifdef PNG_INTERNAL
 398
 399 #include <stdlib.h>
 400
 401 /* The functions exported by PNG_EXTERN are PNG_INTERNAL functions, which
 402  * aren't usually used outside the library (as far as I know), so it is
 403  * debatable if they should be exported at all.  In the future, when it is
 404  * possible to have run-time registry of chunk-handling functions, some of
 405  * these will be made available again.
 406 #define PNG_EXTERN extern
 407  */
 408 #define PNG_EXTERN
 409
 410 /* Other defines specific to compilers can go here.  Try to keep
 411  * them inside an appropriate ifdef/endif pair for portability.
 412  */
 413
 414 #ifdef PNG_FLOATING_POINT_SUPPORTED
 415 #  ifdef MACOS
 416      /* We need to check that <math.h> hasn't already been included earlier
 417       * as it seems it doesn't agree with <fp.h>, yet we should really use
 418       * <fp.h> if possible.
 419       */
 420 #    if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__)
 421 #      include <fp.h>
 422 #    endif
 423 #  else
 424 #    include <math.h>
 425 #  endif
 426 #  if defined(_AMIGA) && defined(__SASC) && defined(_M68881)
 427      /* Amiga SAS/C: We must include builtin FPU functions when compiling using
 428       * MATH=68881
 429       */
 430 #    include <m68881.h>
 431 #  endif
 432 #endif
 433
 434 /* Codewarrior on NT has linking problems without this. */
 435 #if (defined(__MWERKS__) && defined(WIN32)) || defined(__STDC__)
 436 #  define PNG_ALWAYS_EXTERN
 437 #endif
 438
 439 /* This provides the non-ANSI (far) memory allocation routines. */
 440 #if defined(__TURBOC__) && defined(__MSDOS__)
 441 #  include <mem.h>
 442 #  include <alloc.h>
 443 #endif
 444
 445 /* I have no idea why is this necessary... */
 446 #if defined(_MSC_VER) && (defined(WIN32) || defined(_Windows) || \
 447     defined(_WINDOWS) || defined(_WIN32) || defined(__WIN32__))
 448 #  include <malloc.h>
 449 #endif
 450
 451 /* This controls how fine the dithering gets.  As this allocates
 452  * a largish chunk of memory (32K), those who are not as concerned
 453  * with dithering quality can decrease some or all of these.
 454  */
 455 #ifndef PNG_DITHER_RED_BITS
 456 #  define PNG_DITHER_RED_BITS 5
 457 #endif
 458 #ifndef PNG_DITHER_GREEN_BITS
 459 #  define PNG_DITHER_GREEN_BITS 5
 460 #endif
 461 #ifndef PNG_DITHER_BLUE_BITS
 462 #  define PNG_DITHER_BLUE_BITS 5
 463 #endif
 464
 465 /* This controls how fine the gamma correction becomes when you
 466  * are only interested in 8 bits anyway.  Increasing this value
 467  * results in more memory being used, and more pow() functions
 468  * being called to fill in the gamma tables.  Don't set this value
 469  * less then 8, and even that may not work (I haven't tested it).
 470  */
 471
 472 #ifndef PNG_MAX_GAMMA_8
 473 #  define PNG_MAX_GAMMA_8 11
 474 #endif
 475
 476 /* This controls how much a difference in gamma we can tolerate before
 477  * we actually start doing gamma conversion.
 478  */
 479 #ifndef PNG_GAMMA_THRESHOLD
 480 #  define PNG_GAMMA_THRESHOLD 0.05
 481 #endif
 482
 483 #endif /* PNG_INTERNAL */
 484
 485 /* The following uses const char * instead of char * for error
 486  * and warning message functions, so some compilers won't complain.
 487  * If you do not want to use const, define PNG_NO_CONST here.
 488  */
 489
 490 #ifndef PNG_NO_CONST
 491 #  define PNG_CONST const
 492 #else
 493 #  define PNG_CONST
 494 #endif
 495
 496 /* The following defines give you the ability to remove code from the
 497  * library that you will not be using.  I wish I could figure out how to
 498  * automate this, but I can't do that without making it seriously hard
 499  * on the users.  So if you are not using an ability, change the #define
 500  * to and #undef, and that part of the library will not be compiled.  If
 501  * your linker can't find a function, you may want to make sure the
 502  * ability is defined here.  Some of these depend upon some others being
 503  * defined.  I haven't figured out all the interactions here, so you may
 504  * have to experiment awhile to get everything to compile.  If you are
 505  * creating or using a shared library, you probably shouldn't touch this,
 506  * as it will affect the size of the structures, and this will cause bad
 507  * things to happen if the library and/or application ever change.
 508  */
 509
 510 /* Any features you will not be using can be undef'ed here */
 511
 512 /* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user
 513  * to turn it off with "*TRANSFORMS_NOT_SUPPORTED" or *PNG_NO_*_TRANSFORMS
 514  * on the compile line, then pick and choose which ones to define without
 515  * having to edit this file. It is safe to use the *TRANSFORMS_NOT_SUPPORTED
 516  * if you only want to have a png-compliant reader/writer but don't need
 517  * any of the extra transformations.  This saves about 80 kbytes in a
 518  * typical installation of the library. (PNG_NO_* form added in version
 519  * 1.0.1c, for consistency)
 520  */
 521
 522 /* The size of the png_text structure changed in libpng-1.0.6 when
 523  * iTXt support was added.  iTXt support was turned off by default through
 524  * libpng-1.2.x, to support old apps that malloc the png_text structure
 525  * instead of calling png_set_text() and letting libpng malloc it.  It
 526  * will be turned on by default in libpng-1.4.0.
 527  */
 528
 529 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
 530 #  ifndef PNG_NO_iTXt_SUPPORTED
 531 #    define PNG_NO_iTXt_SUPPORTED
 532 #  endif
 533 #  ifndef PNG_NO_READ_iTXt
 534 #    define PNG_NO_READ_iTXt
 535 #  endif
 536 #  ifndef PNG_NO_WRITE_iTXt
 537 #    define PNG_NO_WRITE_iTXt
 538 #  endif
 539 #endif
 540
 541 #if !defined(PNG_NO_iTXt_SUPPORTED)
 542 #  if !defined(PNG_READ_iTXt_SUPPORTED) && !defined(PNG_NO_READ_iTXt)
 543 #    define PNG_READ_iTXt
 544 #  endif
 545 #  if !defined(PNG_WRITE_iTXt_SUPPORTED) && !defined(PNG_NO_WRITE_iTXt)
 546 #    define PNG_WRITE_iTXt
 547 #  endif
 548 #endif
 549
 550 /* The following support, added after version 1.0.0, can be turned off here en
 551  * masse by defining PNG_LEGACY_SUPPORTED in case you need binary compatibility
 552  * with old applications that require the length of png_struct and png_info
 553  * to remain unchanged.
 554  */
 555
 556 #ifdef PNG_LEGACY_SUPPORTED
 557 #  define PNG_NO_FREE_ME
 558 #  define PNG_NO_READ_UNKNOWN_CHUNKS
 559 #  define PNG_NO_WRITE_UNKNOWN_CHUNKS
 560 #  define PNG_NO_HANDLE_AS_UNKNOWN
 561 #  define PNG_NO_READ_USER_CHUNKS
 562 #  define PNG_NO_READ_iCCP
 563 #  define PNG_NO_WRITE_iCCP
 564 #  define PNG_NO_READ_iTXt
 565 #  define PNG_NO_WRITE_iTXt
 566 #  define PNG_NO_READ_sCAL
 567 #  define PNG_NO_WRITE_sCAL
 568 #  define PNG_NO_READ_sPLT
 569 #  define PNG_NO_WRITE_sPLT
 570 #  define PNG_NO_INFO_IMAGE
 571 #  define PNG_NO_READ_RGB_TO_GRAY
 572 #  define PNG_NO_READ_USER_TRANSFORM
 573 #  define PNG_NO_WRITE_USER_TRANSFORM
 574 #  define PNG_NO_USER_MEM
 575 #  define PNG_NO_READ_EMPTY_PLTE
 576 #  define PNG_NO_MNG_FEATURES
 577 #  define PNG_NO_FIXED_POINT_SUPPORTED
 578 #endif
 579
 580 /* Ignore attempt to turn off both floating and fixed point support */
 581 #if !defined(PNG_FLOATING_POINT_SUPPORTED) || \
 582     !defined(PNG_NO_FIXED_POINT_SUPPORTED)
 583 #  define PNG_FIXED_POINT_SUPPORTED
 584 #endif
 585
 586 #ifndef PNG_NO_FREE_ME
 587 #  define PNG_FREE_ME_SUPPORTED
 588 #endif
 589
 590 #ifdef PNG_READ_SUPPORTED
 591
 592 #if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \
 593       !defined(PNG_NO_READ_TRANSFORMS)
 594 #  define PNG_READ_TRANSFORMS_SUPPORTED
 595 #endif
 596
 597 #ifdef PNG_READ_TRANSFORMS_SUPPORTED
 598 #  ifndef PNG_NO_READ_EXPAND
 599 #    define PNG_READ_EXPAND_SUPPORTED
 600 #  endif
 601 #  ifndef PNG_NO_READ_SHIFT
 602 #    define PNG_READ_SHIFT_SUPPORTED
 603 #  endif
 604 #  ifndef PNG_NO_READ_PACK
 605 #    define PNG_READ_PACK_SUPPORTED
 606 #  endif
 607 #  ifndef PNG_NO_READ_BGR
 608 #    define PNG_READ_BGR_SUPPORTED
 609 #  endif
 610 #  ifndef PNG_NO_READ_SWAP
 611 #    define PNG_READ_SWAP_SUPPORTED
 612 #  endif
 613 #  ifndef PNG_NO_READ_PACKSWAP
 614 #    define PNG_READ_PACKSWAP_SUPPORTED
 615 #  endif
 616 #  ifndef PNG_NO_READ_INVERT
 617 #    define PNG_READ_INVERT_SUPPORTED
 618 #  endif
 619 #  ifndef PNG_NO_READ_DITHER
 620 #    define PNG_READ_DITHER_SUPPORTED
 621 #  endif
 622 #  ifndef PNG_NO_READ_BACKGROUND
 623 #    define PNG_READ_BACKGROUND_SUPPORTED
 624 #  endif
 625 #  ifndef PNG_NO_READ_16_TO_8
 626 #    define PNG_READ_16_TO_8_SUPPORTED
 627 #  endif
 628 #  ifndef PNG_NO_READ_FILLER
 629 #    define PNG_READ_FILLER_SUPPORTED
 630 #  endif
 631 #  ifndef PNG_NO_READ_GAMMA
 632 #    define PNG_READ_GAMMA_SUPPORTED
 633 #  endif
 634 #  ifndef PNG_NO_READ_GRAY_TO_RGB
 635 #    define PNG_READ_GRAY_TO_RGB_SUPPORTED
 636 #  endif
 637 #  ifndef PNG_NO_READ_SWAP_ALPHA
 638 #    define PNG_READ_SWAP_ALPHA_SUPPORTED
 639 #  endif
 640 #  ifndef PNG_NO_READ_INVERT_ALPHA
 641 #    define PNG_READ_INVERT_ALPHA_SUPPORTED
 642 #  endif
 643 #  ifndef PNG_NO_READ_STRIP_ALPHA
 644 #    define PNG_READ_STRIP_ALPHA_SUPPORTED
 645 #  endif
 646 #  ifndef PNG_NO_READ_USER_TRANSFORM
 647 #    define PNG_READ_USER_TRANSFORM_SUPPORTED
 648 #  endif
 649 #  ifndef PNG_NO_READ_RGB_TO_GRAY
 650 #    define PNG_READ_RGB_TO_GRAY_SUPPORTED
 651 #  endif
 652 #endif /* PNG_READ_TRANSFORMS_SUPPORTED */
 653
 654 /* PNG_PROGRESSIVE_READ_NOT_SUPPORTED is deprecated. */
 655 #if !defined(PNG_NO_PROGRESSIVE_READ) && \
 656  !defined(PNG_PROGRESSIVE_READ_NOT_SUPPORTED)  /* if you don't do progressive */
 657 #  define PNG_PROGRESSIVE_READ_SUPPORTED     /* reading.  This is not talking */
 658 #endif                               /* about interlacing capability!  You'll */
 659             /* still have interlacing unless you change the following define: */
 660 #define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */
 661
 662 /* PNG_NO_SEQUENTIAL_READ_SUPPORTED is deprecated. */
 663 #if !defined(PNG_NO_SEQUENTIAL_READ) && \
 664     !defined(PNG_SEQUENTIAL_READ_SUPPORTED) && \
 665     !defined(PNG_NO_SEQUENTIAL_READ_SUPPORTED)
 666 #  define PNG_SEQUENTIAL_READ_SUPPORTED
 667 #endif
 668
 669 #define PNG_READ_INTERLACING_SUPPORTED /* required in PNG-compliant decoders */
 670
 671 #ifndef PNG_NO_READ_COMPOSITE_NODIV
 672 #  ifndef PNG_NO_READ_COMPOSITED_NODIV  /* libpng-1.0.x misspelling */
 673 #    define PNG_READ_COMPOSITE_NODIV_SUPPORTED  /* well tested on Intel, SGI */
 674 #  endif
 675 #endif
 676
 677 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
 678 /* Deprecated, will be removed from version 2.0.0.
 679    Use PNG_MNG_FEATURES_SUPPORTED instead. */
 680 #ifndef PNG_NO_READ_EMPTY_PLTE
 681 #  define PNG_READ_EMPTY_PLTE_SUPPORTED
 682 #endif
 683 #endif
 684
 685 #endif /* PNG_READ_SUPPORTED */
 686
 687 #ifdef PNG_WRITE_SUPPORTED
 688
 689 # if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \
 690     !defined(PNG_NO_WRITE_TRANSFORMS)
 691 #  define PNG_WRITE_TRANSFORMS_SUPPORTED
 692 #endif
 693
 694 #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
 695 #  ifndef PNG_NO_WRITE_SHIFT
 696 #    define PNG_WRITE_SHIFT_SUPPORTED
 697 #  endif
 698 #  ifndef PNG_NO_WRITE_PACK
 699 #    define PNG_WRITE_PACK_SUPPORTED
 700 #  endif
 701 #  ifndef PNG_NO_WRITE_BGR
 702 #    define PNG_WRITE_BGR_SUPPORTED
 703 #  endif
 704 #  ifndef PNG_NO_WRITE_SWAP
 705 #    define PNG_WRITE_SWAP_SUPPORTED
 706 #  endif
 707 #  ifndef PNG_NO_WRITE_PACKSWAP
 708 #    define PNG_WRITE_PACKSWAP_SUPPORTED
 709 #  endif
 710 #  ifndef PNG_NO_WRITE_INVERT
 711 #    define PNG_WRITE_INVERT_SUPPORTED
 712 #  endif
 713 #  ifndef PNG_NO_WRITE_FILLER
 714 #    define PNG_WRITE_FILLER_SUPPORTED   /* same as WRITE_STRIP_ALPHA */
 715 #  endif
 716 #  ifndef PNG_NO_WRITE_SWAP_ALPHA
 717 #    define PNG_WRITE_SWAP_ALPHA_SUPPORTED
 718 #  endif
 719 #ifndef PNG_1_0_X
 720 #  ifndef PNG_NO_WRITE_INVERT_ALPHA
 721 #    define PNG_WRITE_INVERT_ALPHA_SUPPORTED
 722 #  endif
 723 #endif
 724 #  ifndef PNG_NO_WRITE_USER_TRANSFORM
 725 #    define PNG_WRITE_USER_TRANSFORM_SUPPORTED
 726 #  endif
 727 #endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */
 728
 729 #if !defined(PNG_NO_WRITE_INTERLACING_SUPPORTED) && \
 730     !defined(PNG_WRITE_INTERLACING_SUPPORTED)
 731 #define PNG_WRITE_INTERLACING_SUPPORTED  /* not required for PNG-compliant
 732                                             encoders, but can cause trouble
 733                                             if left undefined */
 734 #endif
 735
 736 #if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \
 737     !defined(PNG_WRITE_WEIGHTED_FILTER) && \
 738      defined(PNG_FLOATING_POINT_SUPPORTED)
 739 #  define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
 740 #endif
 741
 742 #ifndef PNG_NO_WRITE_FLUSH
 743 #  define PNG_WRITE_FLUSH_SUPPORTED
 744 #endif
 745
 746 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
 747 /* Deprecated, see PNG_MNG_FEATURES_SUPPORTED, above */
 748 #ifndef PNG_NO_WRITE_EMPTY_PLTE
 749 #  define PNG_WRITE_EMPTY_PLTE_SUPPORTED
 750 #endif
 751 #endif
 752
 753 #endif /* PNG_WRITE_SUPPORTED */
 754
 755 #ifndef PNG_1_0_X
 756 #  ifndef PNG_NO_ERROR_NUMBERS
 757 #    define PNG_ERROR_NUMBERS_SUPPORTED
 758 #  endif
 759 #endif /* PNG_1_0_X */
 760
 761 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
 762     defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
 763 #  ifndef PNG_NO_USER_TRANSFORM_PTR
 764 #    define PNG_USER_TRANSFORM_PTR_SUPPORTED
 765 #  endif
 766 #endif
 767
 768 #ifndef PNG_NO_STDIO
 769 #  define PNG_TIME_RFC1123_SUPPORTED
 770 #endif
 771
 772 /* This adds extra functions in pngget.c for accessing data from the
 773  * info pointer (added in version 0.99)
 774  * png_get_image_width()
 775  * png_get_image_height()
 776  * png_get_bit_depth()
 777  * png_get_color_type()
 778  * png_get_compression_type()
 779  * png_get_filter_type()
 780  * png_get_interlace_type()
 781  * png_get_pixel_aspect_ratio()
 782  * png_get_pixels_per_meter()
 783  * png_get_x_offset_pixels()
 784  * png_get_y_offset_pixels()
 785  * png_get_x_offset_microns()
 786  * png_get_y_offset_microns()
 787  */
 788 #if !defined(PNG_NO_EASY_ACCESS) && !defined(PNG_EASY_ACCESS_SUPPORTED)
 789 #  define PNG_EASY_ACCESS_SUPPORTED
 790 #endif
 791
 792 /* PNG_ASSEMBLER_CODE was enabled by default in version 1.2.0
 793  * and removed from version 1.2.20.  The following will be removed
 794  * from libpng-1.4.0
 795 */
 796
 797 #if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_OPTIMIZED_CODE)
 798 #  ifndef PNG_OPTIMIZED_CODE_SUPPORTED
 799 #    define PNG_OPTIMIZED_CODE_SUPPORTED
 800 #  endif
 801 #endif
 802
 803 #if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_ASSEMBLER_CODE)
 804 #  ifndef PNG_ASSEMBLER_CODE_SUPPORTED
 805 #    define PNG_ASSEMBLER_CODE_SUPPORTED
 806 #  endif
 807
 808 #  if defined(__GNUC__) && defined(__x86_64__) && (__GNUC__ < 4)
 809      /* work around 64-bit gcc compiler bugs in gcc-3.x */
 810 #    if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
 811 #      define PNG_NO_MMX_CODE
 812 #    endif
 813 #  endif
 814
 815 #  ifdef __APPLE__
 816 #    if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
 817 #      define PNG_NO_MMX_CODE
 818 #    endif
 819 #  endif
 820
 821 #  if (defined(__MWERKS__) && ((__MWERKS__ < 0x0900) || macintosh))
 822 #    if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
 823 #      define PNG_NO_MMX_CODE
 824 #    endif
 825 #  endif
 826
 827 #  if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
 828 #    define PNG_MMX_CODE_SUPPORTED
 829 #  endif
 830
 831 #endif
 832 /* end of obsolete code to be removed from libpng-1.4.0 */
 833
 834 /* Added at libpng-1.2.0 */
 835 #ifndef PNG_1_0_X
 836 #if !defined(PNG_NO_USER_MEM) && !defined(PNG_USER_MEM_SUPPORTED)
 837 #  define PNG_USER_MEM_SUPPORTED
 838 #endif
 839 #endif /* PNG_1_0_X */
 840
 841 /* Added at libpng-1.2.6 */
 842 #ifndef PNG_1_0_X
 843 #  ifndef PNG_SET_USER_LIMITS_SUPPORTED
 844 #    ifndef PNG_NO_SET_USER_LIMITS
 845 #      define PNG_SET_USER_LIMITS_SUPPORTED
 846 #    endif
 847 #  endif
 848 #endif /* PNG_1_0_X */
 849
 850 /* Added at libpng-1.0.53 and 1.2.43 */
 851 #ifndef PNG_USER_LIMITS_SUPPORTED
 852 #  ifndef PNG_NO_USER_LIMITS
 853 #    define PNG_USER_LIMITS_SUPPORTED
 854 #  endif
 855 #endif
 856
 857 /* Added at libpng-1.0.16 and 1.2.6.  To accept all valid PNGS no matter
 858  * how large, set these limits to 0x7fffffffL
 859  */
 860 #ifndef PNG_USER_WIDTH_MAX
 861 #  define PNG_USER_WIDTH_MAX 1000000L
 862 #endif
 863 #ifndef PNG_USER_HEIGHT_MAX
 864 #  define PNG_USER_HEIGHT_MAX 1000000L
 865 #endif
 866
 867 /* Added at libpng-1.2.43.  To accept all valid PNGs no matter
 868  * how large, set these two limits to 0.
 869  */
 870 #ifndef PNG_USER_CHUNK_CACHE_MAX
 871 #  define PNG_USER_CHUNK_CACHE_MAX 0
 872 #endif
 873
 874 /* Added at libpng-1.2.43 */
 875 #ifndef PNG_USER_CHUNK_MALLOC_MAX
 876 #  define PNG_USER_CHUNK_MALLOC_MAX 0
 877 #endif
 878
 879 #ifndef PNG_LITERAL_SHARP
 880 #  define PNG_LITERAL_SHARP 0x23
 881 #endif
 882 #ifndef PNG_LITERAL_LEFT_SQUARE_BRACKET
 883 #  define PNG_LITERAL_LEFT_SQUARE_BRACKET 0x5b
 884 #endif
 885 #ifndef PNG_LITERAL_RIGHT_SQUARE_BRACKET
 886 #  define PNG_LITERAL_RIGHT_SQUARE_BRACKET 0x5d
 887 #endif
 888
 889 /* Added at libpng-1.2.34 */
 890 #ifndef PNG_STRING_NEWLINE
 891 #define PNG_STRING_NEWLINE "\n"
 892 #endif
 893
 894 /* These are currently experimental features, define them if you want */
 895
 896 /* very little testing */
 897 /*
 898 #ifdef PNG_READ_SUPPORTED
 899 #  ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
 900 #    define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
 901 #  endif
 902 #endif
 903 */
 904
 905 /* This is only for PowerPC big-endian and 680x0 systems */
 906 /* some testing */
 907 /*
 908 #ifndef PNG_READ_BIG_ENDIAN_SUPPORTED
 909 #  define PNG_READ_BIG_ENDIAN_SUPPORTED
 910 #endif
 911 */
 912
 913 /* Buggy compilers (e.g., gcc 2.7.2.2) need this */
 914 /*
 915 #define PNG_NO_POINTER_INDEXING
 916 */
 917
 918 #if !defined(PNG_NO_POINTER_INDEXING) && \
 919     !defined(PNG_POINTER_INDEXING_SUPPORTED)
 920 #  define PNG_POINTER_INDEXING_SUPPORTED
 921 #endif
 922
 923 /* These functions are turned off by default, as they will be phased out. */
 924 /*
 925 #define  PNG_USELESS_TESTS_SUPPORTED
 926 #define  PNG_CORRECT_PALETTE_SUPPORTED
 927 */
 928
 929 /* Any chunks you are not interested in, you can undef here.  The
 930  * ones that allocate memory may be expecially important (hIST,
 931  * tEXt, zTXt, tRNS, pCAL).  Others will just save time and make png_info
 932  * a bit smaller.
 933  */
 934
 935 #if defined(PNG_READ_SUPPORTED) && \
 936     !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
 937     !defined(PNG_NO_READ_ANCILLARY_CHUNKS)
 938 #  define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
 939 #endif
 940
 941 #if defined(PNG_WRITE_SUPPORTED) && \
 942     !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
 943     !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS)
 944 #  define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
 945 #endif
 946
 947 #ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
 948
 949 #ifdef PNG_NO_READ_TEXT
 950 #  define PNG_NO_READ_iTXt
 951 #  define PNG_NO_READ_tEXt
 952 #  define PNG_NO_READ_zTXt
 953 #endif
 954 #ifndef PNG_NO_READ_bKGD
 955 #  define PNG_READ_bKGD_SUPPORTED
 956 #  define PNG_bKGD_SUPPORTED
 957 #endif
 958 #ifndef PNG_NO_READ_cHRM
 959 #  define PNG_READ_cHRM_SUPPORTED
 960 #  define PNG_cHRM_SUPPORTED
 961 #endif
 962 #ifndef PNG_NO_READ_gAMA
 963 #  define PNG_READ_gAMA_SUPPORTED
 964 #  define PNG_gAMA_SUPPORTED
 965 #endif
 966 #ifndef PNG_NO_READ_hIST
 967 #  define PNG_READ_hIST_SUPPORTED
 968 #  define PNG_hIST_SUPPORTED
 969 #endif
 970 #ifndef PNG_NO_READ_iCCP
 971 #  define PNG_READ_iCCP_SUPPORTED
 972 #  define PNG_iCCP_SUPPORTED
 973 #endif
 974 #ifndef PNG_NO_READ_iTXt
 975 #  ifndef PNG_READ_iTXt_SUPPORTED
 976 #    define PNG_READ_iTXt_SUPPORTED
 977 #  endif
 978 #  ifndef PNG_iTXt_SUPPORTED
 979 #    define PNG_iTXt_SUPPORTED
 980 #  endif
 981 #endif
 982 #ifndef PNG_NO_READ_oFFs
 983 #  define PNG_READ_oFFs_SUPPORTED
 984 #  define PNG_oFFs_SUPPORTED
 985 #endif
 986 #ifndef PNG_NO_READ_pCAL
 987 #  define PNG_READ_pCAL_SUPPORTED
 988 #  define PNG_pCAL_SUPPORTED
 989 #endif
 990 #ifndef PNG_NO_READ_sCAL
 991 #  define PNG_READ_sCAL_SUPPORTED
 992 #  define PNG_sCAL_SUPPORTED
 993 #endif
 994 #ifndef PNG_NO_READ_pHYs
 995 #  define PNG_READ_pHYs_SUPPORTED
 996 #  define PNG_pHYs_SUPPORTED
 997 #endif
 998 #ifndef PNG_NO_READ_sBIT
 999 #  define PNG_READ_sBIT_SUPPORTED
1000 #  define PNG_sBIT_SUPPORTED
1001 #endif
1002 #ifndef PNG_NO_READ_sPLT
1003 #  define PNG_READ_sPLT_SUPPORTED
1004 #  define PNG_sPLT_SUPPORTED
1005 #endif
1006 #ifndef PNG_NO_READ_sRGB
1007 #  define PNG_READ_sRGB_SUPPORTED
1008 #  define PNG_sRGB_SUPPORTED
1009 #endif
1010 #ifndef PNG_NO_READ_tEXt
1011 #  define PNG_READ_tEXt_SUPPORTED
1012 #  define PNG_tEXt_SUPPORTED
1013 #endif
1014 #ifndef PNG_NO_READ_tIME
1015 #  define PNG_READ_tIME_SUPPORTED
1016 #  define PNG_tIME_SUPPORTED
1017 #endif
1018 #ifndef PNG_NO_READ_tRNS
1019 #  define PNG_READ_tRNS_SUPPORTED
1020 #  define PNG_tRNS_SUPPORTED
1021 #endif
1022 #ifndef PNG_NO_READ_zTXt
1023 #  define PNG_READ_zTXt_SUPPORTED
1024 #  define PNG_zTXt_SUPPORTED
1025 #endif
1026 #ifndef PNG_NO_READ_OPT_PLTE
1027 #  define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */
1028 #endif                      /* optional PLTE chunk in RGB and RGBA images */
1029 #if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \
1030     defined(PNG_READ_zTXt_SUPPORTED)
1031 #  define PNG_READ_TEXT_SUPPORTED
1032 #  define PNG_TEXT_SUPPORTED
1033 #endif
1034
1035 #endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */
1036
1037 #ifndef PNG_NO_READ_UNKNOWN_CHUNKS
1038 #  define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
1039 #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
1040 #    define PNG_UNKNOWN_CHUNKS_SUPPORTED
1041 #  endif
1042 #endif
1043 #if !defined(PNG_NO_READ_USER_CHUNKS) && \
1044      defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
1045 #  define PNG_READ_USER_CHUNKS_SUPPORTED
1046 #  define PNG_USER_CHUNKS_SUPPORTED
1047 #  ifdef PNG_NO_READ_UNKNOWN_CHUNKS
1048 #    undef PNG_NO_READ_UNKNOWN_CHUNKS
1049 #  endif
1050 #  ifdef PNG_NO_HANDLE_AS_UNKNOWN
1051 #    undef PNG_NO_HANDLE_AS_UNKNOWN
1052 #  endif
1053 #endif
1054
1055 #ifndef PNG_NO_HANDLE_AS_UNKNOWN
1056 #  ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1057 #    define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1058 #  endif
1059 #endif
1060
1061 #ifdef PNG_WRITE_SUPPORTED
1062 #ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
1063
1064 #ifdef PNG_NO_WRITE_TEXT
1065 #  define PNG_NO_WRITE_iTXt
1066 #  define PNG_NO_WRITE_tEXt
1067 #  define PNG_NO_WRITE_zTXt
1068 #endif
1069 #ifndef PNG_NO_WRITE_bKGD
1070 #  define PNG_WRITE_bKGD_SUPPORTED
1071 #  ifndef PNG_bKGD_SUPPORTED
1072 #    define PNG_bKGD_SUPPORTED
1073 #  endif
1074 #endif
1075 #ifndef PNG_NO_WRITE_cHRM
1076 #  define PNG_WRITE_cHRM_SUPPORTED
1077 #  ifndef PNG_cHRM_SUPPORTED
1078 #    define PNG_cHRM_SUPPORTED
1079 #  endif
1080 #endif
1081 #ifndef PNG_NO_WRITE_gAMA
1082 #  define PNG_WRITE_gAMA_SUPPORTED
1083 #  ifndef PNG_gAMA_SUPPORTED
1084 #    define PNG_gAMA_SUPPORTED
1085 #  endif
1086 #endif
1087 #ifndef PNG_NO_WRITE_hIST
1088 #  define PNG_WRITE_hIST_SUPPORTED
1089 #  ifndef PNG_hIST_SUPPORTED
1090 #    define PNG_hIST_SUPPORTED
1091 #  endif
1092 #endif
1093 #ifndef PNG_NO_WRITE_iCCP
1094 #  define PNG_WRITE_iCCP_SUPPORTED
1095 #  ifndef PNG_iCCP_SUPPORTED
1096 #    define PNG_iCCP_SUPPORTED
1097 #  endif
1098 #endif
1099 #ifndef PNG_NO_WRITE_iTXt
1100 #  ifndef PNG_WRITE_iTXt_SUPPORTED
1101 #    define PNG_WRITE_iTXt_SUPPORTED
1102 #  endif
1103 #  ifndef PNG_iTXt_SUPPORTED
1104 #    define PNG_iTXt_SUPPORTED
1105 #  endif
1106 #endif
1107 #ifndef PNG_NO_WRITE_oFFs
1108 #  define PNG_WRITE_oFFs_SUPPORTED
1109 #  ifndef PNG_oFFs_SUPPORTED
1110 #    define PNG_oFFs_SUPPORTED
1111 #  endif
1112 #endif
1113 #ifndef PNG_NO_WRITE_pCAL
1114 #  define PNG_WRITE_pCAL_SUPPORTED
1115 #  ifndef PNG_pCAL_SUPPORTED
1116 #    define PNG_pCAL_SUPPORTED
1117 #  endif
1118 #endif
1119 #ifndef PNG_NO_WRITE_sCAL
1120 #  define PNG_WRITE_sCAL_SUPPORTED
1121 #  ifndef PNG_sCAL_SUPPORTED
1122 #    define PNG_sCAL_SUPPORTED
1123 #  endif
1124 #endif
1125 #ifndef PNG_NO_WRITE_pHYs
1126 #  define PNG_WRITE_pHYs_SUPPORTED
1127 #  ifndef PNG_pHYs_SUPPORTED
1128 #    define PNG_pHYs_SUPPORTED
1129 #  endif
1130 #endif
1131 #ifndef PNG_NO_WRITE_sBIT
1132 #  define PNG_WRITE_sBIT_SUPPORTED
1133 #  ifndef PNG_sBIT_SUPPORTED
1134 #    define PNG_sBIT_SUPPORTED
1135 #  endif
1136 #endif
1137 #ifndef PNG_NO_WRITE_sPLT
1138 #  define PNG_WRITE_sPLT_SUPPORTED
1139 #  ifndef PNG_sPLT_SUPPORTED
1140 #    define PNG_sPLT_SUPPORTED
1141 #  endif
1142 #endif
1143 #ifndef PNG_NO_WRITE_sRGB
1144 #  define PNG_WRITE_sRGB_SUPPORTED
1145 #  ifndef PNG_sRGB_SUPPORTED
1146 #    define PNG_sRGB_SUPPORTED
1147 #  endif
1148 #endif
1149 #ifndef PNG_NO_WRITE_tEXt
1150 #  define PNG_WRITE_tEXt_SUPPORTED
1151 #  ifndef PNG_tEXt_SUPPORTED
1152 #    define PNG_tEXt_SUPPORTED
1153 #  endif
1154 #endif
1155 #ifndef PNG_NO_WRITE_tIME
1156 #  define PNG_WRITE_tIME_SUPPORTED
1157 #  ifndef PNG_tIME_SUPPORTED
1158 #    define PNG_tIME_SUPPORTED
1159 #  endif
1160 #endif
1161 #ifndef PNG_NO_WRITE_tRNS
1162 #  define PNG_WRITE_tRNS_SUPPORTED
1163 #  ifndef PNG_tRNS_SUPPORTED
1164 #    define PNG_tRNS_SUPPORTED
1165 #  endif
1166 #endif
1167 #ifndef PNG_NO_WRITE_zTXt
1168 #  define PNG_WRITE_zTXt_SUPPORTED
1169 #  ifndef PNG_zTXt_SUPPORTED
1170 #    define PNG_zTXt_SUPPORTED
1171 #  endif
1172 #endif
1173 #if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
1174     defined(PNG_WRITE_zTXt_SUPPORTED)
1175 #  define PNG_WRITE_TEXT_SUPPORTED
1176 #  ifndef PNG_TEXT_SUPPORTED
1177 #    define PNG_TEXT_SUPPORTED
1178 #  endif
1179 #endif
1180
1181 #ifdef PNG_WRITE_tIME_SUPPORTED
1182 #  ifndef PNG_NO_CONVERT_tIME
1183 #    ifndef _WIN32_WCE
1184 /*   The "tm" structure is not supported on WindowsCE */
1185 #      ifndef PNG_CONVERT_tIME_SUPPORTED
1186 #        define PNG_CONVERT_tIME_SUPPORTED
1187 #      endif
1188 #   endif
1189 #  endif
1190 #endif
1191
1192 #endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */
1193
1194 #if !defined(PNG_NO_WRITE_FILTER) && !defined(PNG_WRITE_FILTER_SUPPORTED)
1195 #  define PNG_WRITE_FILTER_SUPPORTED
1196 #endif
1197
1198 #ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS
1199 #  define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1200 #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
1201 #    define PNG_UNKNOWN_CHUNKS_SUPPORTED
1202 #  endif
1203 #endif
1204
1205 #ifndef PNG_NO_HANDLE_AS_UNKNOWN
1206 #  ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1207 #    define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1208 #  endif
1209 #endif
1210 #endif /* PNG_WRITE_SUPPORTED */
1211
1212 /* Turn this off to disable png_read_png() and
1213  * png_write_png() and leave the row_pointers member
1214  * out of the info structure.
1215  */
1216 #ifndef PNG_NO_INFO_IMAGE
1217 #  define PNG_INFO_IMAGE_SUPPORTED
1218 #endif
1219
1220 /* Need the time information for converting tIME chunks */
1221 #ifdef PNG_CONVERT_tIME_SUPPORTED
1222      /* "time.h" functions are not supported on WindowsCE */
1223 #    include <time.h>
1224 #endif
1225
1226 /* Some typedefs to get us started.  These should be safe on most of the
1227  * common platforms.  The typedefs should be at least as large as the
1228  * numbers suggest (a png_uint_32 must be at least 32 bits long), but they
1229  * don't have to be exactly that size.  Some compilers dislike passing
1230  * unsigned shorts as function parameters, so you may be better off using
1231  * unsigned int for png_uint_16.  Likewise, for 64-bit systems, you may
1232  * want to have unsigned int for png_uint_32 instead of unsigned long.
1233  */
1234
1235 typedef unsigned long png_uint_32;
1236 typedef long png_int_32;
1237 typedef unsigned short png_uint_16;
1238 typedef short png_int_16;
1239 typedef unsigned char png_byte;
1240
1241 /* This is usually size_t.  It is typedef'ed just in case you need it to
1242    change (I'm not sure if you will or not, so I thought I'd be safe) */
1243 #ifdef PNG_SIZE_T
1244    typedef PNG_SIZE_T png_size_t;
1245 #  define png_sizeof(x) png_convert_size(sizeof(x))
1246 #else
1247    typedef size_t png_size_t;
1248 #  define png_sizeof(x) sizeof(x)
1249 #endif
1250
1251 /* The following is needed for medium model support.  It cannot be in the
1252  * PNG_INTERNAL section.  Needs modification for other compilers besides
1253  * MSC.  Model independent support declares all arrays and pointers to be
1254  * large using the far keyword.  The zlib version used must also support
1255  * model independent data.  As of version zlib 1.0.4, the necessary changes
1256  * have been made in zlib.  The USE_FAR_KEYWORD define triggers other
1257  * changes that are needed. (Tim Wegner)
1258  */
1259
1260 /* Separate compiler dependencies (problem here is that zlib.h always
1261    defines FAR. (SJT) */
1262 #ifdef __BORLANDC__
1263 #  if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)
1264 #    define LDATA 1
1265 #  else
1266 #    define LDATA 0
1267 #  endif
1268    /* GRR:  why is Cygwin in here?  Cygwin is not Borland C... */
1269 #  if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)
1270 #    define PNG_MAX_MALLOC_64K
1271 #    if (LDATA != 1)
1272 #      ifndef FAR
1273 #        define FAR __far
1274 #      endif
1275 #      define USE_FAR_KEYWORD
1276 #    endif   /* LDATA != 1 */
1277      /* Possibly useful for moving data out of default segment.
1278       * Uncomment it if you want. Could also define FARDATA as
1279       * const if your compiler supports it. (SJT)
1280 #    define FARDATA FAR
1281       */
1282 #  endif  /* __WIN32__, __FLAT__, __CYGWIN__ */
1283 #endif   /* __BORLANDC__ */
1284
1285
1286 /* Suggest testing for specific compiler first before testing for
1287  * FAR.  The Watcom compiler defines both __MEDIUM__ and M_I86MM,
1288  * making reliance oncertain keywords suspect. (SJT)
1289  */
1290
1291 /* MSC Medium model */
1292 #ifdef FAR
1293 #  ifdef M_I86MM
1294 #    define USE_FAR_KEYWORD
1295 #    define FARDATA FAR
1296 #    include <dos.h>
1297 #  endif
1298 #endif
1299
1300 /* SJT: default case */
1301 #ifndef FAR
1302 #  define FAR
1303 #endif
1304
1305 /* At this point FAR is always defined */
1306 #ifndef FARDATA
1307 #  define FARDATA
1308 #endif
1309
1310 /* Typedef for floating-point numbers that are converted
1311    to fixed-point with a multiple of 100,000, e.g., int_gamma */
1312 typedef png_int_32 png_fixed_point;
1313
1314 /* Add typedefs for pointers */
1315 typedef void            FAR * png_voidp;
1316 typedef png_byte        FAR * png_bytep;
1317 typedef png_uint_32     FAR * png_uint_32p;
1318 typedef png_int_32      FAR * png_int_32p;
1319 typedef png_uint_16     FAR * png_uint_16p;
1320 typedef png_int_16      FAR * png_int_16p;
1321 typedef PNG_CONST char  FAR * png_const_charp;
1322 typedef char            FAR * png_charp;
1323 typedef png_fixed_point FAR * png_fixed_point_p;
1324
1325 #ifndef PNG_NO_STDIO
1326 #ifdef _WIN32_WCE
1327 typedef HANDLE                png_FILE_p;
1328 #else
1329 typedef FILE                * png_FILE_p;
1330 #endif
1331 #endif
1332
1333 #ifdef PNG_FLOATING_POINT_SUPPORTED
1334 typedef double          FAR * png_doublep;
1335 #endif
1336
1337 /* Pointers to pointers; i.e. arrays */
1338 typedef png_byte        FAR * FAR * png_bytepp;
1339 typedef png_uint_32     FAR * FAR * png_uint_32pp;
1340 typedef png_int_32      FAR * FAR * png_int_32pp;
1341 typedef png_uint_16     FAR * FAR * png_uint_16pp;
1342 typedef png_int_16      FAR * FAR * png_int_16pp;
1343 typedef PNG_CONST char  FAR * FAR * png_const_charpp;
1344 typedef char            FAR * FAR * png_charpp;
1345 typedef png_fixed_point FAR * FAR * png_fixed_point_pp;
1346 #ifdef PNG_FLOATING_POINT_SUPPORTED
1347 typedef double          FAR * FAR * png_doublepp;
1348 #endif
1349
1350 /* Pointers to pointers to pointers; i.e., pointer to array */
1351 typedef char            FAR * FAR * FAR * png_charppp;
1352
1353 #if defined(PNG_1_0_X) || defined(PNG_1_2_X)
1354 /* SPC -  Is this stuff deprecated? */
1355 /* It'll be removed as of libpng-1.4.0 - GR-P */
1356 /* libpng typedefs for types in zlib. If zlib changes
1357  * or another compression library is used, then change these.
1358  * Eliminates need to change all the source files.
1359  */
1360 typedef charf *         png_zcharp;
1361 typedef charf * FAR *   png_zcharpp;
1362 typedef z_stream FAR *  png_zstreamp;
1363 #endif /* (PNG_1_0_X) || defined(PNG_1_2_X) */
1364
1365 /*
1366  * Define PNG_BUILD_DLL if the module being built is a Windows
1367  * LIBPNG DLL.
1368  *
1369  * Define PNG_USE_DLL if you want to *link* to the Windows LIBPNG DLL.
1370  * It is equivalent to Microsoft predefined macro _DLL that is
1371  * automatically defined when you compile using the share
1372  * version of the CRT (C Run-Time library)
1373  *
1374  * The cygwin mods make this behavior a little different:
1375  * Define PNG_BUILD_DLL if you are building a dll for use with cygwin
1376  * Define PNG_STATIC if you are building a static library for use with cygwin,
1377  *   -or- if you are building an application that you want to link to the
1378  *   static library.
1379  * PNG_USE_DLL is defined by default (no user action needed) unless one of
1380  *   the other flags is defined.
1381  */
1382
1383 #if !defined(PNG_DLL) && (defined(PNG_BUILD_DLL) || defined(PNG_USE_DLL))
1384 #  define PNG_DLL
1385 #endif
1386 /* If CYGWIN, then disallow GLOBAL ARRAYS unless building a static lib.
1387  * When building a static lib, default to no GLOBAL ARRAYS, but allow
1388  * command-line override
1389  */
1390 #ifdef __CYGWIN__
1391 #  ifndef PNG_STATIC
1392 #    ifdef PNG_USE_GLOBAL_ARRAYS
1393 #      undef PNG_USE_GLOBAL_ARRAYS
1394 #    endif
1395 #    ifndef PNG_USE_LOCAL_ARRAYS
1396 #      define PNG_USE_LOCAL_ARRAYS
1397 #    endif
1398 #  else
1399 #    if defined(PNG_USE_LOCAL_ARRAYS) || defined(PNG_NO_GLOBAL_ARRAYS)
1400 #      ifdef PNG_USE_GLOBAL_ARRAYS
1401 #        undef PNG_USE_GLOBAL_ARRAYS
1402 #      endif
1403 #    endif
1404 #  endif
1405 #  if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1406 #    define PNG_USE_LOCAL_ARRAYS
1407 #  endif
1408 #endif
1409
1410 /* Do not use global arrays (helps with building DLL's)
1411  * They are no longer used in libpng itself, since version 1.0.5c,
1412  * but might be required for some pre-1.0.5c applications.
1413  */
1414 #if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1415 #  if defined(PNG_NO_GLOBAL_ARRAYS) || \
1416       (defined(__GNUC__) && defined(PNG_DLL)) || defined(_MSC_VER)
1417 #    define PNG_USE_LOCAL_ARRAYS
1418 #  else
1419 #    define PNG_USE_GLOBAL_ARRAYS
1420 #  endif
1421 #endif
1422
1423 #ifdef __CYGWIN__
1424 #  undef PNGAPI
1425 #  define PNGAPI __cdecl
1426 #  undef PNG_IMPEXP
1427 #  define PNG_IMPEXP
1428 #endif
1429
1430 /* If you define PNGAPI, e.g., with compiler option "-DPNGAPI=__stdcall",
1431  * you may get warnings regarding the linkage of png_zalloc and png_zfree.
1432  * Don't ignore those warnings; you must also reset the default calling
1433  * convention in your compiler to match your PNGAPI, and you must build
1434  * zlib and your applications the same way you build libpng.
1435  */
1436
1437 #if defined(__MINGW32__) && !defined(PNG_MODULEDEF)
1438 #  ifndef PNG_NO_MODULEDEF
1439 #    define PNG_NO_MODULEDEF
1440 #  endif
1441 #endif
1442
1443 #if !defined(PNG_IMPEXP) && defined(PNG_BUILD_DLL) && !defined(PNG_NO_MODULEDEF)
1444 #  define PNG_IMPEXP
1445 #endif
1446
1447 #if defined(PNG_DLL) || defined(_DLL) || defined(__DLL__ ) || \
1448     (( defined(_Windows) || defined(_WINDOWS) || \
1449        defined(WIN32) || defined(_WIN32) || defined(__WIN32__) ))
1450
1451 #  ifndef PNGAPI
1452 #     if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
1453 #        define PNGAPI __cdecl
1454 #     else
1455 #        define PNGAPI _cdecl
1456 #     endif
1457 #  endif
1458
1459 #  if !defined(PNG_IMPEXP) && (!defined(PNG_DLL) || \
1460        0 /* WINCOMPILER_WITH_NO_SUPPORT_FOR_DECLIMPEXP */)
1461 #     define PNG_IMPEXP
1462 #  endif
1463
1464 #  ifndef PNG_IMPEXP
1465
1466 #     define PNG_EXPORT_TYPE1(type,symbol)  PNG_IMPEXP type PNGAPI symbol
1467 #     define PNG_EXPORT_TYPE2(type,symbol)  type PNG_IMPEXP PNGAPI symbol
1468
1469       /* Borland/Microsoft */
1470 #     if defined(_MSC_VER) || defined(__BORLANDC__)
1471 #        if (_MSC_VER >= 800) || (__BORLANDC__ >= 0x500)
1472 #           define PNG_EXPORT PNG_EXPORT_TYPE1
1473 #        else
1474 #           define PNG_EXPORT PNG_EXPORT_TYPE2
1475 #           ifdef PNG_BUILD_DLL
1476 #              define PNG_IMPEXP __export
1477 #           else
1478 #              define PNG_IMPEXP /*__import */ /* doesn't exist AFAIK in
1479                                                  VC++ */
1480 #           endif                             /* Exists in Borland C++ for
1481                                                  C++ classes (== huge) */
1482 #        endif
1483 #     endif
1484
1485 #     ifndef PNG_IMPEXP
1486 #        ifdef PNG_BUILD_DLL
1487 #           define PNG_IMPEXP __declspec(dllexport)
1488 #        else
1489 #           define PNG_IMPEXP __declspec(dllimport)
1490 #        endif
1491 #     endif
1492 #  endif  /* PNG_IMPEXP */
1493 #else /* !(DLL || non-cygwin WINDOWS) */
1494 #   if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
1495 #      ifndef PNGAPI
1496 #         define PNGAPI _System
1497 #      endif
1498 #   else
1499 #      if 0 /* ... other platforms, with other meanings */
1500 #      endif
1501 #   endif
1502 #endif
1503
1504 #ifndef PNGAPI
1505 #  define PNGAPI
1506 #endif
1507 #ifndef PNG_IMPEXP
1508 #  define PNG_IMPEXP
1509 #endif
1510
1511 #ifdef PNG_BUILDSYMS
1512 #  ifndef PNG_EXPORT
1513 #    define PNG_EXPORT(type,symbol) PNG_FUNCTION_EXPORT symbol END
1514 #  endif
1515 #  ifdef PNG_USE_GLOBAL_ARRAYS
1516 #    ifndef PNG_EXPORT_VAR
1517 #      define PNG_EXPORT_VAR(type) PNG_DATA_EXPORT
1518 #    endif
1519 #  endif
1520 #endif
1521
1522 #ifndef PNG_EXPORT
1523 #  define PNG_EXPORT(type,symbol) PNG_IMPEXP type PNGAPI symbol
1524 #endif
1525
1526 #ifdef PNG_USE_GLOBAL_ARRAYS
1527 #  ifndef PNG_EXPORT_VAR
1528 #    define PNG_EXPORT_VAR(type) extern PNG_IMPEXP type
1529 #  endif
1530 #endif
1531
1532 #ifdef PNG_PEDANTIC_WARNINGS
1533 #  ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED
1534 #    define PNG_PEDANTIC_WARNINGS_SUPPORTED
1535 #  endif
1536 #endif
1537
1538 #ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED
1539 /* Support for compiler specific function attributes.  These are used
1540  * so that where compiler support is available incorrect use of API
1541  * functions in png.h will generate compiler warnings.  Added at libpng
1542  * version 1.2.41.
1543  */
1544 #  ifdef __GNUC__
1545 #    ifndef PNG_USE_RESULT
1546 #      define PNG_USE_RESULT __attribute__((__warn_unused_result__))
1547 #    endif
1548 #    ifndef PNG_NORETURN
1549 #      define PNG_NORETURN   __attribute__((__noreturn__))
1550 #    endif
1551 #    ifndef PNG_ALLOCATED
1552 #      define PNG_ALLOCATED  __attribute__((__malloc__))
1553 #    endif
1554
1555     /* This specifically protects structure members that should only be
1556      * accessed from within the library, therefore should be empty during
1557      * a library build.
1558      */
1559 #    ifndef PNG_DEPRECATED
1560 #      define PNG_DEPRECATED __attribute__((__deprecated__))
1561 #    endif
1562 #    ifndef PNG_DEPSTRUCT
1563 #      define PNG_DEPSTRUCT  __attribute__((__deprecated__))
1564 #    endif
1565 #    ifndef PNG_PRIVATE
1566 #      if 0 /* Doesn't work so we use deprecated instead*/
1567 #        define PNG_PRIVATE \
1568           __attribute__((warning("This function is not exported by libpng.")))
1569 #      else
1570 #        define PNG_PRIVATE \
1571           __attribute__((__deprecated__))
1572 #      endif
1573 #    endif /* PNG_PRIVATE */
1574 #  endif /* __GNUC__ */
1575 #endif /* PNG_PEDANTIC_WARNINGS */
1576
1577 #ifndef PNG_DEPRECATED
1578 #  define PNG_DEPRECATED  /* Use of this function is deprecated */
1579 #endif
1580 #ifndef PNG_USE_RESULT
1581 #  define PNG_USE_RESULT  /* The result of this function must be checked */
1582 #endif
1583 #ifndef PNG_NORETURN
1584 #  define PNG_NORETURN    /* This function does not return */
1585 #endif
1586 #ifndef PNG_ALLOCATED
1587 #  define PNG_ALLOCATED   /* The result of the function is new memory */
1588 #endif
1589 #ifndef PNG_DEPSTRUCT
1590 #  define PNG_DEPSTRUCT   /* Access to this struct member is deprecated */
1591 #endif
1592 #ifndef PNG_PRIVATE
1593 #  define PNG_PRIVATE     /* This is a private libpng function */
1594 #endif
1595
1596 /* User may want to use these so they are not in PNG_INTERNAL. Any library
1597  * functions that are passed far data must be model independent.
1598  */
1599
1600 #ifndef PNG_ABORT
1601 #  define PNG_ABORT() abort()
1602 #endif
1603
1604 #ifdef PNG_SETJMP_SUPPORTED
1605 #  define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf)
1606 #else
1607 #  define png_jmpbuf(png_ptr) \
1608    (LIBPNG_WAS_COMPILED_WITH__PNG_SETJMP_NOT_SUPPORTED)
1609 #endif
1610
1611 #ifdef USE_FAR_KEYWORD  /* memory model independent fns */
1612 /* Use this to make far-to-near assignments */
1613 #  define CHECK   1
1614 #  define NOCHECK 0
1615 #  define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK))
1616 #  define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK))
1617 #  define png_snprintf _fsnprintf   /* Added to v 1.2.19 */
1618 #  define png_strlen  _fstrlen
1619 #  define png_memcmp  _fmemcmp    /* SJT: added */
1620 #  define png_memcpy  _fmemcpy
1621 #  define png_memset  _fmemset
1622 #else /* Use the usual functions */
1623 #  define CVT_PTR(ptr)         (ptr)
1624 #  define CVT_PTR_NOCHECK(ptr) (ptr)
1625 #  ifndef PNG_NO_SNPRINTF
1626 #    ifdef _MSC_VER
1627 #      define png_snprintf _snprintf   /* Added to v 1.2.19 */
1628 #      define png_snprintf2 _snprintf
1629 #      define png_snprintf6 _snprintf
1630 #    else
1631 #      define png_snprintf snprintf   /* Added to v 1.2.19 */
1632 #      define png_snprintf2 snprintf
1633 #      define png_snprintf6 snprintf
1634 #    endif
1635 #  else
1636      /* You don't have or don't want to use snprintf().  Caution: Using
1637       * sprintf instead of snprintf exposes your application to accidental
1638       * or malevolent buffer overflows.  If you don't have snprintf()
1639       * as a general rule you should provide one (you can get one from
1640       * Portable OpenSSH).
1641       */
1642 #    define png_snprintf(s1,n,fmt,x1) sprintf(s1,fmt,x1)
1643 #    define png_snprintf2(s1,n,fmt,x1,x2) sprintf(s1,fmt,x1,x2)
1644 #    define png_snprintf6(s1,n,fmt,x1,x2,x3,x4,x5,x6) \
1645         sprintf(s1,fmt,x1,x2,x3,x4,x5,x6)
1646 #  endif
1647 #  define png_strlen  strlen
1648 #  define png_memcmp  memcmp      /* SJT: added */
1649 #  define png_memcpy  memcpy
1650 #  define png_memset  memset
1651 #endif
1652 /* End of memory model independent support */
1653
1654 /* Just a little check that someone hasn't tried to define something
1655  * contradictory.
1656  */
1657 #if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K)
1658 #  undef PNG_ZBUF_SIZE
1659 #  define PNG_ZBUF_SIZE 65536L
1660 #endif
1661
1662 /* Added at libpng-1.2.8 */
1663 #endif /* PNG_VERSION_INFO_ONLY */
1664
1665 #endif /* PNGCONF_H */