core/libs/libpng-1.2.18/pngconf.h

   1
   2 /* pngconf.h - machine configurable file for libpng
   3  *
   4  * libpng version 1.2.18 - May 15, 2007
   5  * For conditions of distribution and use, see copyright notice in png.h
   6  * Copyright (c) 1998-2007 Glenn Randers-Pehrson
   7  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
   8  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
   9  */
  10
  11 /* Any machine specific code is near the front of this file, so if you
  12  * are configuring libpng for a machine, you may want to read the section
  13  * starting here down to where it starts to typedef png_color, png_text,
  14  * and png_info.
  15  */
  16
  17 #ifndef PNGCONF_H
  18 #define PNGCONF_H
  19
  20 #define PNG_1_2_X
  21
  22 /*
  23  * PNG_USER_CONFIG has to be defined on the compiler command line. This
  24  * includes the resource compiler for Windows DLL configurations.
  25  */
  26 #ifdef PNG_USER_CONFIG
  27 #  ifndef PNG_USER_PRIVATEBUILD
  28 #    define PNG_USER_PRIVATEBUILD
  29 #  endif
  30 #include "pngusr.h"
  31 #endif
  32
  33 /* PNG_CONFIGURE_LIBPNG is set by the "configure" script. */
  34 #ifdef PNG_CONFIGURE_LIBPNG
  35 #ifdef HAVE_CONFIG_H
  36 #include "config.h"
  37 #endif
  38 #endif
  39
  40 /*
  41  * Added at libpng-1.2.8
  42  *
  43  * If you create a private DLL you need to define in "pngusr.h" the followings:
  44  * #define PNG_USER_PRIVATEBUILD <Describes by whom and why this version of
  45  *        the DLL was built>
  46  *  e.g. #define PNG_USER_PRIVATEBUILD "Build by MyCompany for xyz reasons."
  47  * #define PNG_USER_DLLFNAME_POSTFIX <two-letter postfix that serve to
  48  *        distinguish your DLL from those of the official release. These
  49  *        correspond to the trailing letters that come after the version
  50  *        number and must match your private DLL name>
  51  *  e.g. // private DLL "libpng13gx.dll"
  52  *       #define PNG_USER_DLLFNAME_POSTFIX "gx"
  53  *
  54  * The following macros are also at your disposal if you want to complete the
  55  * DLL VERSIONINFO structure.
  56  * - PNG_USER_VERSIONINFO_COMMENTS
  57  * - PNG_USER_VERSIONINFO_COMPANYNAME
  58  * - PNG_USER_VERSIONINFO_LEGALTRADEMARKS
  59  */
  60
  61 #ifdef __STDC__
  62 #ifdef SPECIALBUILD
  63 #  pragma message("PNG_LIBPNG_SPECIALBUILD (and deprecated SPECIALBUILD)\
  64  are now LIBPNG reserved macros. Use PNG_USER_PRIVATEBUILD instead.")
  65 #endif
  66
  67 #ifdef PRIVATEBUILD
  68 # pragma message("PRIVATEBUILD is deprecated.\
  69  Use PNG_USER_PRIVATEBUILD instead.")
  70 # define PNG_USER_PRIVATEBUILD PRIVATEBUILD
  71 #endif
  72 #endif /* __STDC__ */
  73
  74 #ifndef PNG_VERSION_INFO_ONLY
  75
  76 /* End of material added to libpng-1.2.8 */
  77
  78 /* This is the size of the compression buffer, and thus the size of
  79  * an IDAT chunk.  Make this whatever size you feel is best for your
  80  * machine.  One of these will be allocated per png_struct.  When this
  81  * is full, it writes the data to the disk, and does some other
  82  * calculations.  Making this an extremely small size will slow
  83  * the library down, but you may want to experiment to determine
  84  * where it becomes significant, if you are concerned with memory
  85  * usage.  Note that zlib allocates at least 32Kb also.  For readers,
  86  * this describes the size of the buffer available to read the data in.
  87  * Unless this gets smaller than the size of a row (compressed),
  88  * it should not make much difference how big this is.
  89  */
  90
  91 #ifndef PNG_ZBUF_SIZE
  92 #  define PNG_ZBUF_SIZE 8192
  93 #endif
  94
  95 /* Enable if you want a write-only libpng */
  96
  97 #ifndef PNG_NO_READ_SUPPORTED
  98 #  define PNG_READ_SUPPORTED
  99 #endif
 100
 101 /* Enable if you want a read-only libpng */
 102
 103 #ifndef PNG_NO_WRITE_SUPPORTED
 104 #  define PNG_WRITE_SUPPORTED
 105 #endif
 106
 107 /* Enabled by default in 1.2.0.  You can disable this if you don't need to
 108    support PNGs that are embedded in MNG datastreams */
 109 #if !defined(PNG_1_0_X) && !defined(PNG_NO_MNG_FEATURES)
 110 #  ifndef PNG_MNG_FEATURES_SUPPORTED
 111 #    define PNG_MNG_FEATURES_SUPPORTED
 112 #  endif
 113 #endif
 114
 115 #ifndef PNG_NO_FLOATING_POINT_SUPPORTED
 116 #  ifndef PNG_FLOATING_POINT_SUPPORTED
 117 #    define PNG_FLOATING_POINT_SUPPORTED
 118 #  endif
 119 #endif
 120
 121 /* If you are running on a machine where you cannot allocate more
 122  * than 64K of memory at once, uncomment this.  While libpng will not
 123  * normally need that much memory in a chunk (unless you load up a very
 124  * large file), zlib needs to know how big of a chunk it can use, and
 125  * libpng thus makes sure to check any memory allocation to verify it
 126  * will fit into memory.
 127 #define PNG_MAX_MALLOC_64K
 128  */
 129 #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
 130 #  define PNG_MAX_MALLOC_64K
 131 #endif
 132
 133 /* Special munging to support doing things the 'cygwin' way:
 134  * 'Normal' png-on-win32 defines/defaults:
 135  *   PNG_BUILD_DLL -- building dll
 136  *   PNG_USE_DLL   -- building an application, linking to dll
 137  *   (no define)   -- building static library, or building an
 138  *                    application and linking to the static lib
 139  * 'Cygwin' defines/defaults:
 140  *   PNG_BUILD_DLL -- (ignored) building the dll
 141  *   (no define)   -- (ignored) building an application, linking to the dll
 142  *   PNG_STATIC    -- (ignored) building the static lib, or building an
 143  *                    application that links to the static lib.
 144  *   ALL_STATIC    -- (ignored) building various static libs, or building an
 145  *                    application that links to the static libs.
 146  * Thus,
 147  * a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and
 148  * this bit of #ifdefs will define the 'correct' config variables based on
 149  * that. If a cygwin user *wants* to define 'PNG_USE_DLL' that's okay, but
 150  * unnecessary.
 151  *
 152  * Also, the precedence order is:
 153  *   ALL_STATIC (since we can't #undef something outside our namespace)
 154  *   PNG_BUILD_DLL
 155  *   PNG_STATIC
 156  *   (nothing) == PNG_USE_DLL
 157  *
 158  * CYGWIN (2002-01-20): The preceding is now obsolete. With the advent
 159  *   of auto-import in binutils, we no longer need to worry about
 160  *   __declspec(dllexport) / __declspec(dllimport) and friends.  Therefore,
 161  *   we don't need to worry about PNG_STATIC or ALL_STATIC when it comes
 162  *   to __declspec() stuff.  However, we DO need to worry about
 163  *   PNG_BUILD_DLL and PNG_STATIC because those change some defaults
 164  *   such as CONSOLE_IO and whether GLOBAL_ARRAYS are allowed.
 165  */
 166 #if defined(__CYGWIN__)
 167 #  if defined(ALL_STATIC)
 168 #    if defined(PNG_BUILD_DLL)
 169 #      undef PNG_BUILD_DLL
 170 #    endif
 171 #    if defined(PNG_USE_DLL)
 172 #      undef PNG_USE_DLL
 173 #    endif
 174 #    if defined(PNG_DLL)
 175 #      undef PNG_DLL
 176 #    endif
 177 #    if !defined(PNG_STATIC)
 178 #      define PNG_STATIC
 179 #    endif
 180 #  else
 181 #    if defined (PNG_BUILD_DLL)
 182 #      if defined(PNG_STATIC)
 183 #        undef PNG_STATIC
 184 #      endif
 185 #      if defined(PNG_USE_DLL)
 186 #        undef PNG_USE_DLL
 187 #      endif
 188 #      if !defined(PNG_DLL)
 189 #        define PNG_DLL
 190 #      endif
 191 #    else
 192 #      if defined(PNG_STATIC)
 193 #        if defined(PNG_USE_DLL)
 194 #          undef PNG_USE_DLL
 195 #        endif
 196 #        if defined(PNG_DLL)
 197 #          undef PNG_DLL
 198 #        endif
 199 #      else
 200 #        if !defined(PNG_USE_DLL)
 201 #          define PNG_USE_DLL
 202 #        endif
 203 #        if !defined(PNG_DLL)
 204 #          define PNG_DLL
 205 #        endif
 206 #      endif
 207 #    endif
 208 #  endif
 209 #endif
 210
 211 /* This protects us against compilers that run on a windowing system
 212  * and thus don't have or would rather us not use the stdio types:
 213  * stdin, stdout, and stderr.  The only one currently used is stderr
 214  * in png_error() and png_warning().  #defining PNG_NO_CONSOLE_IO will
 215  * prevent these from being compiled and used. #defining PNG_NO_STDIO
 216  * will also prevent these, plus will prevent the entire set of stdio
 217  * macros and functions (FILE *, printf, etc.) from being compiled and used,
 218  * unless (PNG_DEBUG > 0) has been #defined.
 219  *
 220  * #define PNG_NO_CONSOLE_IO
 221  * #define PNG_NO_STDIO
 222  */
 223
 224 #if defined(_WIN32_WCE)
 225 #  include <windows.h>
 226    /* Console I/O functions are not supported on WindowsCE */
 227 #  define PNG_NO_CONSOLE_IO
 228 #  ifdef PNG_DEBUG
 229 #    undef PNG_DEBUG
 230 #  endif
 231 #endif
 232
 233 #ifdef PNG_BUILD_DLL
 234 #  ifndef PNG_CONSOLE_IO_SUPPORTED
 235 #    ifndef PNG_NO_CONSOLE_IO
 236 #      define PNG_NO_CONSOLE_IO
 237 #    endif
 238 #  endif
 239 #endif
 240
 241 #  ifdef PNG_NO_STDIO
 242 #    ifndef PNG_NO_CONSOLE_IO
 243 #      define PNG_NO_CONSOLE_IO
 244 #    endif
 245 #    ifdef PNG_DEBUG
 246 #      if (PNG_DEBUG > 0)
 247 #        include <stdio.h>
 248 #      endif
 249 #    endif
 250 #  else
 251 #    if !defined(_WIN32_WCE)
 252 /* "stdio.h" functions are not supported on WindowsCE */
 253 #      include <stdio.h>
 254 #    endif
 255 #  endif
 256
 257 /* This macro protects us against machines that don't have function
 258  * prototypes (ie K&R style headers).  If your compiler does not handle
 259  * function prototypes, define this macro and use the included ansi2knr.
 260  * I've always been able to use _NO_PROTO as the indicator, but you may
 261  * need to drag the empty declaration out in front of here, or change the
 262  * ifdef to suit your own needs.
 263  */
 264 #ifndef PNGARG
 265
 266 #ifdef OF /* zlib prototype munger */
 267 #  define PNGARG(arglist) OF(arglist)
 268 #else
 269
 270 #ifdef _NO_PROTO
 271 #  define PNGARG(arglist) ()
 272 #  ifndef PNG_TYPECAST_NULL
 273 #     define PNG_TYPECAST_NULL
 274 #  endif
 275 #else
 276 #  define PNGARG(arglist) arglist
 277 #endif /* _NO_PROTO */
 278
 279 #endif /* OF */
 280
 281 #endif /* PNGARG */
 282
 283 /* Try to determine if we are compiling on a Mac.  Note that testing for
 284  * just __MWERKS__ is not good enough, because the Codewarrior is now used
 285  * on non-Mac platforms.
 286  */
 287 #ifndef MACOS
 288 #  if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
 289       defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC)
 290 #    define MACOS
 291 #  endif
 292 #endif
 293
 294 /* enough people need this for various reasons to include it here */
 295 #if !defined(MACOS) && !defined(RISCOS) && !defined(_WIN32_WCE)
 296 #  include <sys/types.h>
 297 #endif
 298
 299 #if !defined(PNG_SETJMP_NOT_SUPPORTED) && !defined(PNG_NO_SETJMP_SUPPORTED)
 300 #  define PNG_SETJMP_SUPPORTED
 301 #endif
 302
 303 #ifdef PNG_SETJMP_SUPPORTED
 304 /* This is an attempt to force a single setjmp behaviour on Linux.  If
 305  * the X config stuff didn't define _BSD_SOURCE we wouldn't need this.
 306  */
 307
 308 #  ifdef __linux__
 309 #    ifdef _BSD_SOURCE
 310 #      define PNG_SAVE_BSD_SOURCE
 311 #      undef _BSD_SOURCE
 312 #    endif
 313 #    ifdef _SETJMP_H
 314      /* If you encounter a compiler error here, see the explanation
 315       * near the end of INSTALL.
 316       */
 317          __png.h__ already includes setjmp.h;
 318          __dont__ include it again.;
 319 #    endif
 320 #  endif /* __linux__ */
 321
 322    /* include setjmp.h for error handling */
 323 #  include <setjmp.h>
 324
 325 #  ifdef __linux__
 326 #    ifdef PNG_SAVE_BSD_SOURCE
 327 #      define _BSD_SOURCE
 328 #      undef PNG_SAVE_BSD_SOURCE
 329 #    endif
 330 #  endif /* __linux__ */
 331 #endif /* PNG_SETJMP_SUPPORTED */
 332
 333 #ifdef BSD
 334 #  include <strings.h>
 335 #else
 336 #  include <string.h>
 337 #endif
 338
 339 /* Other defines for things like memory and the like can go here.  */
 340 #ifdef PNG_INTERNAL
 341
 342 #include <stdlib.h>
 343
 344 /* The functions exported by PNG_EXTERN are PNG_INTERNAL functions, which
 345  * aren't usually used outside the library (as far as I know), so it is
 346  * debatable if they should be exported at all.  In the future, when it is
 347  * possible to have run-time registry of chunk-handling functions, some of
 348  * these will be made available again.
 349 #define PNG_EXTERN extern
 350  */
 351 #define PNG_EXTERN
 352
 353 /* Other defines specific to compilers can go here.  Try to keep
 354  * them inside an appropriate ifdef/endif pair for portability.
 355  */
 356
 357 #if defined(PNG_FLOATING_POINT_SUPPORTED)
 358 #  if defined(MACOS)
 359      /* We need to check that <math.h> hasn't already been included earlier
 360       * as it seems it doesn't agree with <fp.h>, yet we should really use
 361       * <fp.h> if possible.
 362       */
 363 #    if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__)
 364 #      include <fp.h>
 365 #    endif
 366 #  else
 367 #    include <math.h>
 368 #  endif
 369 #  if defined(_AMIGA) && defined(__SASC) && defined(_M68881)
 370      /* Amiga SAS/C: We must include builtin FPU functions when compiling using
 371       * MATH=68881
 372       */
 373 #    include <m68881.h>
 374 #  endif
 375 #endif
 376
 377 /* Codewarrior on NT has linking problems without this. */
 378 #if (defined(__MWERKS__) && defined(WIN32)) || defined(__STDC__)
 379 #  define PNG_ALWAYS_EXTERN
 380 #endif
 381
 382 /* This provides the non-ANSI (far) memory allocation routines. */
 383 #if defined(__TURBOC__) && defined(__MSDOS__)
 384 #  include <mem.h>
 385 #  include <alloc.h>
 386 #endif
 387
 388 /* I have no idea why is this necessary... */
 389 #if defined(_MSC_VER) && (defined(WIN32) || defined(_Windows) || \
 390     defined(_WINDOWS) || defined(_WIN32) || defined(__WIN32__))
 391 #  include <malloc.h>
 392 #endif
 393
 394 /* This controls how fine the dithering gets.  As this allocates
 395  * a largish chunk of memory (32K), those who are not as concerned
 396  * with dithering quality can decrease some or all of these.
 397  */
 398 #ifndef PNG_DITHER_RED_BITS
 399 #  define PNG_DITHER_RED_BITS 5
 400 #endif
 401 #ifndef PNG_DITHER_GREEN_BITS
 402 #  define PNG_DITHER_GREEN_BITS 5
 403 #endif
 404 #ifndef PNG_DITHER_BLUE_BITS
 405 #  define PNG_DITHER_BLUE_BITS 5
 406 #endif
 407
 408 /* This controls how fine the gamma correction becomes when you
 409  * are only interested in 8 bits anyway.  Increasing this value
 410  * results in more memory being used, and more pow() functions
 411  * being called to fill in the gamma tables.  Don't set this value
 412  * less then 8, and even that may not work (I haven't tested it).
 413  */
 414
 415 #ifndef PNG_MAX_GAMMA_8
 416 #  define PNG_MAX_GAMMA_8 11
 417 #endif
 418
 419 /* This controls how much a difference in gamma we can tolerate before
 420  * we actually start doing gamma conversion.
 421  */
 422 #ifndef PNG_GAMMA_THRESHOLD
 423 #  define PNG_GAMMA_THRESHOLD 0.05
 424 #endif
 425
 426 #endif /* PNG_INTERNAL */
 427
 428 /* The following uses const char * instead of char * for error
 429  * and warning message functions, so some compilers won't complain.
 430  * If you do not want to use const, define PNG_NO_CONST here.
 431  */
 432
 433 #ifndef PNG_NO_CONST
 434 #  define PNG_CONST const
 435 #else
 436 #  define PNG_CONST
 437 #endif
 438
 439 /* The following defines give you the ability to remove code from the
 440  * library that you will not be using.  I wish I could figure out how to
 441  * automate this, but I can't do that without making it seriously hard
 442  * on the users.  So if you are not using an ability, change the #define
 443  * to and #undef, and that part of the library will not be compiled.  If
 444  * your linker can't find a function, you may want to make sure the
 445  * ability is defined here.  Some of these depend upon some others being
 446  * defined.  I haven't figured out all the interactions here, so you may
 447  * have to experiment awhile to get everything to compile.  If you are
 448  * creating or using a shared library, you probably shouldn't touch this,
 449  * as it will affect the size of the structures, and this will cause bad
 450  * things to happen if the library and/or application ever change.
 451  */
 452
 453 /* Any features you will not be using can be undef'ed here */
 454
 455 /* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user
 456  * to turn it off with "*TRANSFORMS_NOT_SUPPORTED" or *PNG_NO_*_TRANSFORMS
 457  * on the compile line, then pick and choose which ones to define without
 458  * having to edit this file. It is safe to use the *TRANSFORMS_NOT_SUPPORTED
 459  * if you only want to have a png-compliant reader/writer but don't need
 460  * any of the extra transformations.  This saves about 80 kbytes in a
 461  * typical installation of the library. (PNG_NO_* form added in version
 462  * 1.0.1c, for consistency)
 463  */
 464
 465 /* The size of the png_text structure changed in libpng-1.0.6 when
 466  * iTXt support was added.  iTXt support was turned off by default through
 467  * libpng-1.2.x, to support old apps that malloc the png_text structure
 468  * instead of calling png_set_text() and letting libpng malloc it.  It
 469  * was turned on by default in libpng-1.3.0.
 470  */
 471
 472 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
 473 #  ifndef PNG_NO_iTXt_SUPPORTED
 474 #    define PNG_NO_iTXt_SUPPORTED
 475 #  endif
 476 #  ifndef PNG_NO_READ_iTXt
 477 #    define PNG_NO_READ_iTXt
 478 #  endif
 479 #  ifndef PNG_NO_WRITE_iTXt
 480 #    define PNG_NO_WRITE_iTXt
 481 #  endif
 482 #endif
 483
 484 #if !defined(PNG_NO_iTXt_SUPPORTED)
 485 #  if !defined(PNG_READ_iTXt_SUPPORTED) && !defined(PNG_NO_READ_iTXt)
 486 #    define PNG_READ_iTXt
 487 #  endif
 488 #  if !defined(PNG_WRITE_iTXt_SUPPORTED) && !defined(PNG_NO_WRITE_iTXt)
 489 #    define PNG_WRITE_iTXt
 490 #  endif
 491 #endif
 492
 493 /* The following support, added after version 1.0.0, can be turned off here en
 494  * masse by defining PNG_LEGACY_SUPPORTED in case you need binary compatibility
 495  * with old applications that require the length of png_struct and png_info
 496  * to remain unchanged.
 497  */
 498
 499 #ifdef PNG_LEGACY_SUPPORTED
 500 #  define PNG_NO_FREE_ME
 501 #  define PNG_NO_READ_UNKNOWN_CHUNKS
 502 #  define PNG_NO_WRITE_UNKNOWN_CHUNKS
 503 #  define PNG_NO_READ_USER_CHUNKS
 504 #  define PNG_NO_READ_iCCP
 505 #  define PNG_NO_WRITE_iCCP
 506 #  define PNG_NO_READ_iTXt
 507 #  define PNG_NO_WRITE_iTXt
 508 #  define PNG_NO_READ_sCAL
 509 #  define PNG_NO_WRITE_sCAL
 510 #  define PNG_NO_READ_sPLT
 511 #  define PNG_NO_WRITE_sPLT
 512 #  define PNG_NO_INFO_IMAGE
 513 #  define PNG_NO_READ_RGB_TO_GRAY
 514 #  define PNG_NO_READ_USER_TRANSFORM
 515 #  define PNG_NO_WRITE_USER_TRANSFORM
 516 #  define PNG_NO_USER_MEM
 517 #  define PNG_NO_READ_EMPTY_PLTE
 518 #  define PNG_NO_MNG_FEATURES
 519 #  define PNG_NO_FIXED_POINT_SUPPORTED
 520 #endif
 521
 522 /* Ignore attempt to turn off both floating and fixed point support */
 523 #if !defined(PNG_FLOATING_POINT_SUPPORTED) || \
 524     !defined(PNG_NO_FIXED_POINT_SUPPORTED)
 525 #  define PNG_FIXED_POINT_SUPPORTED
 526 #endif
 527
 528 #ifndef PNG_NO_FREE_ME
 529 #  define PNG_FREE_ME_SUPPORTED
 530 #endif
 531
 532 #if defined(PNG_READ_SUPPORTED)
 533
 534 #if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \
 535       !defined(PNG_NO_READ_TRANSFORMS)
 536 #  define PNG_READ_TRANSFORMS_SUPPORTED
 537 #endif
 538
 539 #ifdef PNG_READ_TRANSFORMS_SUPPORTED
 540 #  ifndef PNG_NO_READ_EXPAND
 541 #    define PNG_READ_EXPAND_SUPPORTED
 542 #  endif
 543 #  ifndef PNG_NO_READ_SHIFT
 544 #    define PNG_READ_SHIFT_SUPPORTED
 545 #  endif
 546 #  ifndef PNG_NO_READ_PACK
 547 #    define PNG_READ_PACK_SUPPORTED
 548 #  endif
 549 #  ifndef PNG_NO_READ_BGR
 550 #    define PNG_READ_BGR_SUPPORTED
 551 #  endif
 552 #  ifndef PNG_NO_READ_SWAP
 553 #    define PNG_READ_SWAP_SUPPORTED
 554 #  endif
 555 #  ifndef PNG_NO_READ_PACKSWAP
 556 #    define PNG_READ_PACKSWAP_SUPPORTED
 557 #  endif
 558 #  ifndef PNG_NO_READ_INVERT
 559 #    define PNG_READ_INVERT_SUPPORTED
 560 #  endif
 561 #  ifndef PNG_NO_READ_DITHER
 562 #    define PNG_READ_DITHER_SUPPORTED
 563 #  endif
 564 #  ifndef PNG_NO_READ_BACKGROUND
 565 #    define PNG_READ_BACKGROUND_SUPPORTED
 566 #  endif
 567 #  ifndef PNG_NO_READ_16_TO_8
 568 #    define PNG_READ_16_TO_8_SUPPORTED
 569 #  endif
 570 #  ifndef PNG_NO_READ_FILLER
 571 #    define PNG_READ_FILLER_SUPPORTED
 572 #  endif
 573 #  ifndef PNG_NO_READ_GAMMA
 574 #    define PNG_READ_GAMMA_SUPPORTED
 575 #  endif
 576 #  ifndef PNG_NO_READ_GRAY_TO_RGB
 577 #    define PNG_READ_GRAY_TO_RGB_SUPPORTED
 578 #  endif
 579 #  ifndef PNG_NO_READ_SWAP_ALPHA
 580 #    define PNG_READ_SWAP_ALPHA_SUPPORTED
 581 #  endif
 582 #  ifndef PNG_NO_READ_INVERT_ALPHA
 583 #    define PNG_READ_INVERT_ALPHA_SUPPORTED
 584 #  endif
 585 #  ifndef PNG_NO_READ_STRIP_ALPHA
 586 #    define PNG_READ_STRIP_ALPHA_SUPPORTED
 587 #  endif
 588 #  ifndef PNG_NO_READ_USER_TRANSFORM
 589 #    define PNG_READ_USER_TRANSFORM_SUPPORTED
 590 #  endif
 591 #  ifndef PNG_NO_READ_RGB_TO_GRAY
 592 #    define PNG_READ_RGB_TO_GRAY_SUPPORTED
 593 #  endif
 594 #endif /* PNG_READ_TRANSFORMS_SUPPORTED */
 595
 596 #if !defined(PNG_NO_PROGRESSIVE_READ) && \
 597  !defined(PNG_PROGRESSIVE_READ_NOT_SUPPORTED)  /* if you don't do progressive */
 598 #  define PNG_PROGRESSIVE_READ_SUPPORTED     /* reading.  This is not talking */
 599 #endif                               /* about interlacing capability!  You'll */
 600               /* still have interlacing unless you change the following line: */
 601
 602 #define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */
 603
 604 #ifndef PNG_NO_READ_COMPOSITE_NODIV
 605 #  ifndef PNG_NO_READ_COMPOSITED_NODIV  /* libpng-1.0.x misspelling */
 606 #    define PNG_READ_COMPOSITE_NODIV_SUPPORTED   /* well tested on Intel, SGI */
 607 #  endif
 608 #endif
 609
 610 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
 611 /* Deprecated, will be removed from version 2.0.0.
 612    Use PNG_MNG_FEATURES_SUPPORTED instead. */
 613 #ifndef PNG_NO_READ_EMPTY_PLTE
 614 #  define PNG_READ_EMPTY_PLTE_SUPPORTED
 615 #endif
 616 #endif
 617
 618 #endif /* PNG_READ_SUPPORTED */
 619
 620 #if defined(PNG_WRITE_SUPPORTED)
 621
 622 # if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \
 623     !defined(PNG_NO_WRITE_TRANSFORMS)
 624 #  define PNG_WRITE_TRANSFORMS_SUPPORTED
 625 #endif
 626
 627 #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
 628 #  ifndef PNG_NO_WRITE_SHIFT
 629 #    define PNG_WRITE_SHIFT_SUPPORTED
 630 #  endif
 631 #  ifndef PNG_NO_WRITE_PACK
 632 #    define PNG_WRITE_PACK_SUPPORTED
 633 #  endif
 634 #  ifndef PNG_NO_WRITE_BGR
 635 #    define PNG_WRITE_BGR_SUPPORTED
 636 #  endif
 637 #  ifndef PNG_NO_WRITE_SWAP
 638 #    define PNG_WRITE_SWAP_SUPPORTED
 639 #  endif
 640 #  ifndef PNG_NO_WRITE_PACKSWAP
 641 #    define PNG_WRITE_PACKSWAP_SUPPORTED
 642 #  endif
 643 #  ifndef PNG_NO_WRITE_INVERT
 644 #    define PNG_WRITE_INVERT_SUPPORTED
 645 #  endif
 646 #  ifndef PNG_NO_WRITE_FILLER
 647 #    define PNG_WRITE_FILLER_SUPPORTED   /* same as WRITE_STRIP_ALPHA */
 648 #  endif
 649 #  ifndef PNG_NO_WRITE_SWAP_ALPHA
 650 #    define PNG_WRITE_SWAP_ALPHA_SUPPORTED
 651 #  endif
 652 #  ifndef PNG_NO_WRITE_INVERT_ALPHA
 653 #    define PNG_WRITE_INVERT_ALPHA_SUPPORTED
 654 #  endif
 655 #  ifndef PNG_NO_WRITE_USER_TRANSFORM
 656 #    define PNG_WRITE_USER_TRANSFORM_SUPPORTED
 657 #  endif
 658 #endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */
 659
 660 #if !defined(PNG_NO_WRITE_INTERLACING_SUPPORTED) && \
 661     !defined(PNG_WRITE_INTERLACING_SUPPORTED)
 662 #define PNG_WRITE_INTERLACING_SUPPORTED  /* not required for PNG-compliant
 663                                             encoders, but can cause trouble
 664                                             if left undefined */
 665 #endif
 666
 667 #if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \
 668     !defined(PNG_WRITE_WEIGHTED_FILTER) && \
 669      defined(PNG_FLOATING_POINT_SUPPORTED)
 670 #  define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
 671 #endif
 672
 673 #ifndef PNG_NO_WRITE_FLUSH
 674 #  define PNG_WRITE_FLUSH_SUPPORTED
 675 #endif
 676
 677 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
 678 /* Deprecated, see PNG_MNG_FEATURES_SUPPORTED, above */
 679 #ifndef PNG_NO_WRITE_EMPTY_PLTE
 680 #  define PNG_WRITE_EMPTY_PLTE_SUPPORTED
 681 #endif
 682 #endif
 683
 684 #endif /* PNG_WRITE_SUPPORTED */
 685
 686 #ifndef PNG_1_0_X
 687 #  ifndef PNG_NO_ERROR_NUMBERS
 688 #    define PNG_ERROR_NUMBERS_SUPPORTED
 689 #  endif
 690 #endif /* PNG_1_0_X */
 691
 692 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
 693     defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
 694 #  ifndef PNG_NO_USER_TRANSFORM_PTR
 695 #    define PNG_USER_TRANSFORM_PTR_SUPPORTED
 696 #  endif
 697 #endif
 698
 699 #ifndef PNG_NO_STDIO
 700 #  define PNG_TIME_RFC1123_SUPPORTED
 701 #endif
 702
 703 /* This adds extra functions in pngget.c for accessing data from the
 704  * info pointer (added in version 0.99)
 705  * png_get_image_width()
 706  * png_get_image_height()
 707  * png_get_bit_depth()
 708  * png_get_color_type()
 709  * png_get_compression_type()
 710  * png_get_filter_type()
 711  * png_get_interlace_type()
 712  * png_get_pixel_aspect_ratio()
 713  * png_get_pixels_per_meter()
 714  * png_get_x_offset_pixels()
 715  * png_get_y_offset_pixels()
 716  * png_get_x_offset_microns()
 717  * png_get_y_offset_microns()
 718  */
 719 #if !defined(PNG_NO_EASY_ACCESS) && !defined(PNG_EASY_ACCESS_SUPPORTED)
 720 #  define PNG_EASY_ACCESS_SUPPORTED
 721 #endif
 722
 723 /* PNG_ASSEMBLER_CODE was enabled by default in version 1.2.0
 724  * even when PNG_USE_PNGVCRD or PNG_USE_PNGGCCRD is not defined.
 725  *
 726  * PNG_NO_ASSEMBLER_CODE disables use of all assembler code and optimized C,
 727  * and removes or includes several functions in the API.
 728  *
 729  * PNG_NO_MMX_CODE disables the use of MMX code without changing the API.
 730  * When MMX code is off, then optimized C replacement functions are used.
 731 */
 732 #if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_ASSEMBLER_CODE)
 733 #  ifndef PNG_ASSEMBLER_CODE_SUPPORTED
 734 #    define PNG_ASSEMBLER_CODE_SUPPORTED
 735 #  endif
 736 #  if defined(XP_MACOSX) && !defined(PNG_NO_MMX_CODE)
 737      /* work around Intel-Mac compiler bug */
 738 #    define PNG_NO_MMX_CODE
 739 #  endif
 740 #  if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE) && \
 741      defined(__MMX__)
 742 #    define PNG_MMX_CODE_SUPPORTED
 743 #  endif
 744 #  if !defined(PNG_USE_PNGGCCRD) && !defined(PNG_NO_MMX_CODE) && \
 745      !defined(PNG_USE_PNGVCRD) && defined(__MMX__)
 746 #    define PNG_USE_PNGGCCRD
 747 #  endif
 748 #endif
 749
 750 /* If you are sure that you don't need thread safety and you are compiling
 751    with PNG_USE_PNGCCRD for an MMX application, you can define this for
 752    faster execution.  See pnggccrd.c.
 753 #define PNG_THREAD_UNSAFE_OK
 754 */
 755
 756 #if !defined(PNG_1_0_X)
 757 #if !defined(PNG_NO_USER_MEM) && !defined(PNG_USER_MEM_SUPPORTED)
 758 #  define PNG_USER_MEM_SUPPORTED
 759 #endif
 760 #endif /* PNG_1_0_X */
 761
 762 /* Added at libpng-1.2.6 */
 763 #if !defined(PNG_1_0_X)
 764 #ifndef PNG_SET_USER_LIMITS_SUPPORTED
 765 #if !defined(PNG_NO_SET_USER_LIMITS) && !defined(PNG_SET_USER_LIMITS_SUPPORTED)
 766 #  define PNG_SET_USER_LIMITS_SUPPORTED
 767 #endif
 768 #endif
 769 #endif /* PNG_1_0_X */
 770
 771 /* Added at libpng-1.0.16 and 1.2.6.  To accept all valid PNGS no matter
 772  * how large, set these limits to 0x7fffffffL
 773  */
 774 #ifndef PNG_USER_WIDTH_MAX
 775 #  define PNG_USER_WIDTH_MAX 1000000L
 776 #endif
 777 #ifndef PNG_USER_HEIGHT_MAX
 778 #  define PNG_USER_HEIGHT_MAX 1000000L
 779 #endif
 780
 781 /* These are currently experimental features, define them if you want */
 782
 783 /* very little testing */
 784 /*
 785 #ifdef PNG_READ_SUPPORTED
 786 #  ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
 787 #    define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
 788 #  endif
 789 #endif
 790 */
 791
 792 /* This is only for PowerPC big-endian and 680x0 systems */
 793 /* some testing */
 794 /*
 795 #ifndef PNG_READ_BIG_ENDIAN_SUPPORTED
 796 #  define PNG_READ_BIG_ENDIAN_SUPPORTED
 797 #endif
 798 */
 799
 800 /* Buggy compilers (e.g., gcc 2.7.2.2) need this */
 801 /*
 802 #define PNG_NO_POINTER_INDEXING
 803 */
 804
 805 /* These functions are turned off by default, as they will be phased out. */
 806 /*
 807 #define  PNG_USELESS_TESTS_SUPPORTED
 808 #define  PNG_CORRECT_PALETTE_SUPPORTED
 809 */
 810
 811 /* Any chunks you are not interested in, you can undef here.  The
 812  * ones that allocate memory may be expecially important (hIST,
 813  * tEXt, zTXt, tRNS, pCAL).  Others will just save time and make png_info
 814  * a bit smaller.
 815  */
 816
 817 #if defined(PNG_READ_SUPPORTED) && \
 818     !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
 819     !defined(PNG_NO_READ_ANCILLARY_CHUNKS)
 820 #  define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
 821 #endif
 822
 823 #if defined(PNG_WRITE_SUPPORTED) && \
 824     !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
 825     !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS)
 826 #  define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
 827 #endif
 828
 829 #ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
 830
 831 #ifdef PNG_NO_READ_TEXT
 832 #  define PNG_NO_READ_iTXt
 833 #  define PNG_NO_READ_tEXt
 834 #  define PNG_NO_READ_zTXt
 835 #endif
 836 #ifndef PNG_NO_READ_bKGD
 837 #  define PNG_READ_bKGD_SUPPORTED
 838 #  define PNG_bKGD_SUPPORTED
 839 #endif
 840 #ifndef PNG_NO_READ_cHRM
 841 #  define PNG_READ_cHRM_SUPPORTED
 842 #  define PNG_cHRM_SUPPORTED
 843 #endif
 844 #ifndef PNG_NO_READ_gAMA
 845 #  define PNG_READ_gAMA_SUPPORTED
 846 #  define PNG_gAMA_SUPPORTED
 847 #endif
 848 #ifndef PNG_NO_READ_hIST
 849 #  define PNG_READ_hIST_SUPPORTED
 850 #  define PNG_hIST_SUPPORTED
 851 #endif
 852 #ifndef PNG_NO_READ_iCCP
 853 #  define PNG_READ_iCCP_SUPPORTED
 854 #  define PNG_iCCP_SUPPORTED
 855 #endif
 856 #ifndef PNG_NO_READ_iTXt
 857 #  ifndef PNG_READ_iTXt_SUPPORTED
 858 #    define PNG_READ_iTXt_SUPPORTED
 859 #  endif
 860 #  ifndef PNG_iTXt_SUPPORTED
 861 #    define PNG_iTXt_SUPPORTED
 862 #  endif
 863 #endif
 864 #ifndef PNG_NO_READ_oFFs
 865 #  define PNG_READ_oFFs_SUPPORTED
 866 #  define PNG_oFFs_SUPPORTED
 867 #endif
 868 #ifndef PNG_NO_READ_pCAL
 869 #  define PNG_READ_pCAL_SUPPORTED
 870 #  define PNG_pCAL_SUPPORTED
 871 #endif
 872 #ifndef PNG_NO_READ_sCAL
 873 #  define PNG_READ_sCAL_SUPPORTED
 874 #  define PNG_sCAL_SUPPORTED
 875 #endif
 876 #ifndef PNG_NO_READ_pHYs
 877 #  define PNG_READ_pHYs_SUPPORTED
 878 #  define PNG_pHYs_SUPPORTED
 879 #endif
 880 #ifndef PNG_NO_READ_sBIT
 881 #  define PNG_READ_sBIT_SUPPORTED
 882 #  define PNG_sBIT_SUPPORTED
 883 #endif
 884 #ifndef PNG_NO_READ_sPLT
 885 #  define PNG_READ_sPLT_SUPPORTED
 886 #  define PNG_sPLT_SUPPORTED
 887 #endif
 888 #ifndef PNG_NO_READ_sRGB
 889 #  define PNG_READ_sRGB_SUPPORTED
 890 #  define PNG_sRGB_SUPPORTED
 891 #endif
 892 #ifndef PNG_NO_READ_tEXt
 893 #  define PNG_READ_tEXt_SUPPORTED
 894 #  define PNG_tEXt_SUPPORTED
 895 #endif
 896 #ifndef PNG_NO_READ_tIME
 897 #  define PNG_READ_tIME_SUPPORTED
 898 #  define PNG_tIME_SUPPORTED
 899 #endif
 900 #ifndef PNG_NO_READ_tRNS
 901 #  define PNG_READ_tRNS_SUPPORTED
 902 #  define PNG_tRNS_SUPPORTED
 903 #endif
 904 #ifndef PNG_NO_READ_zTXt
 905 #  define PNG_READ_zTXt_SUPPORTED
 906 #  define PNG_zTXt_SUPPORTED
 907 #endif
 908 #ifndef PNG_NO_READ_UNKNOWN_CHUNKS
 909 #  define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
 910 #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
 911 #    define PNG_UNKNOWN_CHUNKS_SUPPORTED
 912 #  endif
 913 #  ifndef PNG_NO_HANDLE_AS_UNKNOWN
 914 #    define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
 915 #  endif
 916 #endif
 917 #if !defined(PNG_NO_READ_USER_CHUNKS) && \
 918      defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
 919 #  define PNG_READ_USER_CHUNKS_SUPPORTED
 920 #  define PNG_USER_CHUNKS_SUPPORTED
 921 #  ifdef PNG_NO_READ_UNKNOWN_CHUNKS
 922 #    undef PNG_NO_READ_UNKNOWN_CHUNKS
 923 #  endif
 924 #  ifdef PNG_NO_HANDLE_AS_UNKNOWN
 925 #    undef PNG_NO_HANDLE_AS_UNKNOWN
 926 #  endif
 927 #endif
 928 #ifndef PNG_NO_READ_OPT_PLTE
 929 #  define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */
 930 #endif                      /* optional PLTE chunk in RGB and RGBA images */
 931 #if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \
 932     defined(PNG_READ_zTXt_SUPPORTED)
 933 #  define PNG_READ_TEXT_SUPPORTED
 934 #  define PNG_TEXT_SUPPORTED
 935 #endif
 936
 937 #endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */
 938
 939 #ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
 940
 941 #ifdef PNG_NO_WRITE_TEXT
 942 #  define PNG_NO_WRITE_iTXt
 943 #  define PNG_NO_WRITE_tEXt
 944 #  define PNG_NO_WRITE_zTXt
 945 #endif
 946 #ifndef PNG_NO_WRITE_bKGD
 947 #  define PNG_WRITE_bKGD_SUPPORTED
 948 #  ifndef PNG_bKGD_SUPPORTED
 949 #    define PNG_bKGD_SUPPORTED
 950 #  endif
 951 #endif
 952 #ifndef PNG_NO_WRITE_cHRM
 953 #  define PNG_WRITE_cHRM_SUPPORTED
 954 #  ifndef PNG_cHRM_SUPPORTED
 955 #    define PNG_cHRM_SUPPORTED
 956 #  endif
 957 #endif
 958 #ifndef PNG_NO_WRITE_gAMA
 959 #  define PNG_WRITE_gAMA_SUPPORTED
 960 #  ifndef PNG_gAMA_SUPPORTED
 961 #    define PNG_gAMA_SUPPORTED
 962 #  endif
 963 #endif
 964 #ifndef PNG_NO_WRITE_hIST
 965 #  define PNG_WRITE_hIST_SUPPORTED
 966 #  ifndef PNG_hIST_SUPPORTED
 967 #    define PNG_hIST_SUPPORTED
 968 #  endif
 969 #endif
 970 #ifndef PNG_NO_WRITE_iCCP
 971 #  define PNG_WRITE_iCCP_SUPPORTED
 972 #  ifndef PNG_iCCP_SUPPORTED
 973 #    define PNG_iCCP_SUPPORTED
 974 #  endif
 975 #endif
 976 #ifndef PNG_NO_WRITE_iTXt
 977 #  ifndef PNG_WRITE_iTXt_SUPPORTED
 978 #    define PNG_WRITE_iTXt_SUPPORTED
 979 #  endif
 980 #  ifndef PNG_iTXt_SUPPORTED
 981 #    define PNG_iTXt_SUPPORTED
 982 #  endif
 983 #endif
 984 #ifndef PNG_NO_WRITE_oFFs
 985 #  define PNG_WRITE_oFFs_SUPPORTED
 986 #  ifndef PNG_oFFs_SUPPORTED
 987 #    define PNG_oFFs_SUPPORTED
 988 #  endif
 989 #endif
 990 #ifndef PNG_NO_WRITE_pCAL
 991 #  define PNG_WRITE_pCAL_SUPPORTED
 992 #  ifndef PNG_pCAL_SUPPORTED
 993 #    define PNG_pCAL_SUPPORTED
 994 #  endif
 995 #endif
 996 #ifndef PNG_NO_WRITE_sCAL
 997 #  define PNG_WRITE_sCAL_SUPPORTED
 998 #  ifndef PNG_sCAL_SUPPORTED
 999 #    define PNG_sCAL_SUPPORTED
1000 #  endif
1001 #endif
1002 #ifndef PNG_NO_WRITE_pHYs
1003 #  define PNG_WRITE_pHYs_SUPPORTED
1004 #  ifndef PNG_pHYs_SUPPORTED
1005 #    define PNG_pHYs_SUPPORTED
1006 #  endif
1007 #endif
1008 #ifndef PNG_NO_WRITE_sBIT
1009 #  define PNG_WRITE_sBIT_SUPPORTED
1010 #  ifndef PNG_sBIT_SUPPORTED
1011 #    define PNG_sBIT_SUPPORTED
1012 #  endif
1013 #endif
1014 #ifndef PNG_NO_WRITE_sPLT
1015 #  define PNG_WRITE_sPLT_SUPPORTED
1016 #  ifndef PNG_sPLT_SUPPORTED
1017 #    define PNG_sPLT_SUPPORTED
1018 #  endif
1019 #endif
1020 #ifndef PNG_NO_WRITE_sRGB
1021 #  define PNG_WRITE_sRGB_SUPPORTED
1022 #  ifndef PNG_sRGB_SUPPORTED
1023 #    define PNG_sRGB_SUPPORTED
1024 #  endif
1025 #endif
1026 #ifndef PNG_NO_WRITE_tEXt
1027 #  define PNG_WRITE_tEXt_SUPPORTED
1028 #  ifndef PNG_tEXt_SUPPORTED
1029 #    define PNG_tEXt_SUPPORTED
1030 #  endif
1031 #endif
1032 #ifndef PNG_NO_WRITE_tIME
1033 #  define PNG_WRITE_tIME_SUPPORTED
1034 #  ifndef PNG_tIME_SUPPORTED
1035 #    define PNG_tIME_SUPPORTED
1036 #  endif
1037 #endif
1038 #ifndef PNG_NO_WRITE_tRNS
1039 #  define PNG_WRITE_tRNS_SUPPORTED
1040 #  ifndef PNG_tRNS_SUPPORTED
1041 #    define PNG_tRNS_SUPPORTED
1042 #  endif
1043 #endif
1044 #ifndef PNG_NO_WRITE_zTXt
1045 #  define PNG_WRITE_zTXt_SUPPORTED
1046 #  ifndef PNG_zTXt_SUPPORTED
1047 #    define PNG_zTXt_SUPPORTED
1048 #  endif
1049 #endif
1050 #ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS
1051 #  define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1052 #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
1053 #    define PNG_UNKNOWN_CHUNKS_SUPPORTED
1054 #  endif
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 #endif
1061 #if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
1062     defined(PNG_WRITE_zTXt_SUPPORTED)
1063 #  define PNG_WRITE_TEXT_SUPPORTED
1064 #  ifndef PNG_TEXT_SUPPORTED
1065 #    define PNG_TEXT_SUPPORTED
1066 #  endif
1067 #endif
1068
1069 #endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */
1070
1071 /* Turn this off to disable png_read_png() and
1072  * png_write_png() and leave the row_pointers member
1073  * out of the info structure.
1074  */
1075 #ifndef PNG_NO_INFO_IMAGE
1076 #  define PNG_INFO_IMAGE_SUPPORTED
1077 #endif
1078
1079 /* need the time information for reading tIME chunks */
1080 #if defined(PNG_tIME_SUPPORTED)
1081 #  if !defined(_WIN32_WCE)
1082      /* "time.h" functions are not supported on WindowsCE */
1083 #    include <time.h>
1084 #  endif
1085 #endif
1086
1087 /* Some typedefs to get us started.  These should be safe on most of the
1088  * common platforms.  The typedefs should be at least as large as the
1089  * numbers suggest (a png_uint_32 must be at least 32 bits long), but they
1090  * don't have to be exactly that size.  Some compilers dislike passing
1091  * unsigned shorts as function parameters, so you may be better off using
1092  * unsigned int for png_uint_16.  Likewise, for 64-bit systems, you may
1093  * want to have unsigned int for png_uint_32 instead of unsigned long.
1094  */
1095
1096 typedef unsigned long png_uint_32;
1097 typedef long png_int_32;
1098 typedef unsigned short png_uint_16;
1099 typedef short png_int_16;
1100 typedef unsigned char png_byte;
1101
1102 /* This is usually size_t.  It is typedef'ed just in case you need it to
1103    change (I'm not sure if you will or not, so I thought I'd be safe) */
1104 #ifdef PNG_SIZE_T
1105    typedef PNG_SIZE_T png_size_t;
1106 #  define png_sizeof(x) png_convert_size(sizeof (x))
1107 #else
1108    typedef size_t png_size_t;
1109 #  define png_sizeof(x) sizeof (x)
1110 #endif
1111
1112 /* The following is needed for medium model support.  It cannot be in the
1113  * PNG_INTERNAL section.  Needs modification for other compilers besides
1114  * MSC.  Model independent support declares all arrays and pointers to be
1115  * large using the far keyword.  The zlib version used must also support
1116  * model independent data.  As of version zlib 1.0.4, the necessary changes
1117  * have been made in zlib.  The USE_FAR_KEYWORD define triggers other
1118  * changes that are needed. (Tim Wegner)
1119  */
1120
1121 /* Separate compiler dependencies (problem here is that zlib.h always
1122    defines FAR. (SJT) */
1123 #ifdef __BORLANDC__
1124 #  if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)
1125 #    define LDATA 1
1126 #  else
1127 #    define LDATA 0
1128 #  endif
1129    /* GRR:  why is Cygwin in here?  Cygwin is not Borland C... */
1130 #  if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)
1131 #    define PNG_MAX_MALLOC_64K
1132 #    if (LDATA != 1)
1133 #      ifndef FAR
1134 #        define FAR __far
1135 #      endif
1136 #      define USE_FAR_KEYWORD
1137 #    endif   /* LDATA != 1 */
1138      /* Possibly useful for moving data out of default segment.
1139       * Uncomment it if you want. Could also define FARDATA as
1140       * const if your compiler supports it. (SJT)
1141 #    define FARDATA FAR
1142       */
1143 #  endif  /* __WIN32__, __FLAT__, __CYGWIN__ */
1144 #endif   /* __BORLANDC__ */
1145
1146
1147 /* Suggest testing for specific compiler first before testing for
1148  * FAR.  The Watcom compiler defines both __MEDIUM__ and M_I86MM,
1149  * making reliance oncertain keywords suspect. (SJT)
1150  */
1151
1152 /* MSC Medium model */
1153 #if defined(FAR)
1154 #  if defined(M_I86MM)
1155 #    define USE_FAR_KEYWORD
1156 #    define FARDATA FAR
1157 #    include <dos.h>
1158 #  endif
1159 #endif
1160
1161 /* SJT: default case */
1162 #ifndef FAR
1163 #  define FAR
1164 #endif
1165
1166 /* At this point FAR is always defined */
1167 #ifndef FARDATA
1168 #  define FARDATA
1169 #endif
1170
1171 /* Typedef for floating-point numbers that are converted
1172    to fixed-point with a multiple of 100,000, e.g., int_gamma */
1173 typedef png_int_32 png_fixed_point;
1174
1175 /* Add typedefs for pointers */
1176 typedef void            FAR * png_voidp;
1177 typedef png_byte        FAR * png_bytep;
1178 typedef png_uint_32     FAR * png_uint_32p;
1179 typedef png_int_32      FAR * png_int_32p;
1180 typedef png_uint_16     FAR * png_uint_16p;
1181 typedef png_int_16      FAR * png_int_16p;
1182 typedef PNG_CONST char  FAR * png_const_charp;
1183 typedef char            FAR * png_charp;
1184 typedef png_fixed_point FAR * png_fixed_point_p;
1185
1186 #ifndef PNG_NO_STDIO
1187 #if defined(_WIN32_WCE)
1188 typedef HANDLE                png_FILE_p;
1189 #else
1190 typedef FILE                * png_FILE_p;
1191 #endif
1192 #endif
1193
1194 #ifdef PNG_FLOATING_POINT_SUPPORTED
1195 typedef double          FAR * png_doublep;
1196 #endif
1197
1198 /* Pointers to pointers; i.e. arrays */
1199 typedef png_byte        FAR * FAR * png_bytepp;
1200 typedef png_uint_32     FAR * FAR * png_uint_32pp;
1201 typedef png_int_32      FAR * FAR * png_int_32pp;
1202 typedef png_uint_16     FAR * FAR * png_uint_16pp;
1203 typedef png_int_16      FAR * FAR * png_int_16pp;
1204 typedef PNG_CONST char  FAR * FAR * png_const_charpp;
1205 typedef char            FAR * FAR * png_charpp;
1206 typedef png_fixed_point FAR * FAR * png_fixed_point_pp;
1207 #ifdef PNG_FLOATING_POINT_SUPPORTED
1208 typedef double          FAR * FAR * png_doublepp;
1209 #endif
1210
1211 /* Pointers to pointers to pointers; i.e., pointer to array */
1212 typedef char            FAR * FAR * FAR * png_charppp;
1213
1214 #if defined(PNG_1_0_X) || defined(PNG_1_2_X)
1215 /* SPC -  Is this stuff deprecated? */
1216 /* It'll be removed as of libpng-1.3.0 - GR-P */
1217 /* libpng typedefs for types in zlib. If zlib changes
1218  * or another compression library is used, then change these.
1219  * Eliminates need to change all the source files.
1220  */
1221 typedef charf *         png_zcharp;
1222 typedef charf * FAR *   png_zcharpp;
1223 typedef z_stream FAR *  png_zstreamp;
1224 #endif /* (PNG_1_0_X) || defined(PNG_1_2_X) */
1225
1226 /*
1227  * Define PNG_BUILD_DLL if the module being built is a Windows
1228  * LIBPNG DLL.
1229  *
1230  * Define PNG_USE_DLL if you want to *link* to the Windows LIBPNG DLL.
1231  * It is equivalent to Microsoft predefined macro _DLL that is
1232  * automatically defined when you compile using the share
1233  * version of the CRT (C Run-Time library)
1234  *
1235  * The cygwin mods make this behavior a little different:
1236  * Define PNG_BUILD_DLL if you are building a dll for use with cygwin
1237  * Define PNG_STATIC if you are building a static library for use with cygwin,
1238  *   -or- if you are building an application that you want to link to the
1239  *   static library.
1240  * PNG_USE_DLL is defined by default (no user action needed) unless one of
1241  *   the other flags is defined.
1242  */
1243
1244 #if !defined(PNG_DLL) && (defined(PNG_BUILD_DLL) || defined(PNG_USE_DLL))
1245 #  define PNG_DLL
1246 #endif
1247 /* If CYGWIN, then disallow GLOBAL ARRAYS unless building a static lib.
1248  * When building a static lib, default to no GLOBAL ARRAYS, but allow
1249  * command-line override
1250  */
1251 #if defined(__CYGWIN__)
1252 #  if !defined(PNG_STATIC)
1253 #    if defined(PNG_USE_GLOBAL_ARRAYS)
1254 #      undef PNG_USE_GLOBAL_ARRAYS
1255 #    endif
1256 #    if !defined(PNG_USE_LOCAL_ARRAYS)
1257 #      define PNG_USE_LOCAL_ARRAYS
1258 #    endif
1259 #  else
1260 #    if defined(PNG_USE_LOCAL_ARRAYS) || defined(PNG_NO_GLOBAL_ARRAYS)
1261 #      if defined(PNG_USE_GLOBAL_ARRAYS)
1262 #        undef PNG_USE_GLOBAL_ARRAYS
1263 #      endif
1264 #    endif
1265 #  endif
1266 #  if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1267 #    define PNG_USE_LOCAL_ARRAYS
1268 #  endif
1269 #endif
1270
1271 /* Do not use global arrays (helps with building DLL's)
1272  * They are no longer used in libpng itself, since version 1.0.5c,
1273  * but might be required for some pre-1.0.5c applications.
1274  */
1275 #if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1276 #  if defined(PNG_NO_GLOBAL_ARRAYS) || (defined(__GNUC__) && defined(PNG_DLL))
1277 #    define PNG_USE_LOCAL_ARRAYS
1278 #  else
1279 #    define PNG_USE_GLOBAL_ARRAYS
1280 #  endif
1281 #endif
1282
1283 #if defined(__CYGWIN__)
1284 #  undef PNGAPI
1285 #  define PNGAPI __cdecl
1286 #  undef PNG_IMPEXP
1287 #  define PNG_IMPEXP
1288 #endif
1289
1290 /* If you define PNGAPI, e.g., with compiler option "-DPNGAPI=__stdcall",
1291  * you may get warnings regarding the linkage of png_zalloc and png_zfree.
1292  * Don't ignore those warnings; you must also reset the default calling
1293  * convention in your compiler to match your PNGAPI, and you must build
1294  * zlib and your applications the same way you build libpng.
1295  */
1296
1297 #if defined(__MINGW32__) && !defined(PNG_MODULEDEF)
1298 #  ifndef PNG_NO_MODULEDEF
1299 #    define PNG_NO_MODULEDEF
1300 #  endif
1301 #endif
1302
1303 #if !defined(PNG_IMPEXP) && defined(PNG_BUILD_DLL) && !defined(PNG_NO_MODULEDEF)
1304 #  define PNG_IMPEXP
1305 #endif
1306
1307 #if defined(PNG_DLL) || defined(_DLL) || defined(__DLL__ ) || \
1308     (( defined(_Windows) || defined(_WINDOWS) || \
1309        defined(WIN32) || defined(_WIN32) || defined(__WIN32__) ))
1310
1311 #  ifndef PNGAPI
1312 #     if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
1313 #        define PNGAPI __cdecl
1314 #     else
1315 #        define PNGAPI _cdecl
1316 #     endif
1317 #  endif
1318
1319 #  if !defined(PNG_IMPEXP) && (!defined(PNG_DLL) || \
1320        0 /* WINCOMPILER_WITH_NO_SUPPORT_FOR_DECLIMPEXP */)
1321 #     define PNG_IMPEXP
1322 #  endif
1323
1324 #  if !defined(PNG_IMPEXP)
1325
1326 #     define PNG_EXPORT_TYPE1(type,symbol)  PNG_IMPEXP type PNGAPI symbol
1327 #     define PNG_EXPORT_TYPE2(type,symbol)  type PNG_IMPEXP PNGAPI symbol
1328
1329       /* Borland/Microsoft */
1330 #     if defined(_MSC_VER) || defined(__BORLANDC__)
1331 #        if (_MSC_VER >= 800) || (__BORLANDC__ >= 0x500)
1332 #           define PNG_EXPORT PNG_EXPORT_TYPE1
1333 #        else
1334 #           define PNG_EXPORT PNG_EXPORT_TYPE2
1335 #           if defined(PNG_BUILD_DLL)
1336 #              define PNG_IMPEXP __export
1337 #           else
1338 #              define PNG_IMPEXP /*__import */ /* doesn't exist AFAIK in
1339                                                  VC++ */
1340 #           endif                             /* Exists in Borland C++ for
1341                                                  C++ classes (== huge) */
1342 #        endif
1343 #     endif
1344
1345 #     if !defined(PNG_IMPEXP)
1346 #        if defined(PNG_BUILD_DLL)
1347 #           define PNG_IMPEXP __declspec(dllexport)
1348 #        else
1349 #           define PNG_IMPEXP __declspec(dllimport)
1350 #        endif
1351 #     endif
1352 #  endif  /* PNG_IMPEXP */
1353 #else /* !(DLL || non-cygwin WINDOWS) */
1354 #   if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
1355 #      ifndef PNGAPI
1356 #         define PNGAPI _System
1357 #      endif
1358 #   else
1359 #      if 0 /* ... other platforms, with other meanings */
1360 #      endif
1361 #   endif
1362 #endif
1363
1364 #ifndef PNGAPI
1365 #  define PNGAPI
1366 #endif
1367 #ifndef PNG_IMPEXP
1368 #  define PNG_IMPEXP
1369 #endif
1370
1371 #ifdef PNG_BUILDSYMS
1372 #  ifndef PNG_EXPORT
1373 #    define PNG_EXPORT(type,symbol) PNG_FUNCTION_EXPORT symbol END
1374 #  endif
1375 #  ifdef PNG_USE_GLOBAL_ARRAYS
1376 #    ifndef PNG_EXPORT_VAR
1377 #      define PNG_EXPORT_VAR(type) PNG_DATA_EXPORT
1378 #    endif
1379 #  endif
1380 #endif
1381
1382 #ifndef PNG_EXPORT
1383 #  define PNG_EXPORT(type,symbol) PNG_IMPEXP type PNGAPI symbol
1384 #endif
1385
1386 #ifdef PNG_USE_GLOBAL_ARRAYS
1387 #  ifndef PNG_EXPORT_VAR
1388 #    define PNG_EXPORT_VAR(type) extern PNG_IMPEXP type
1389 #  endif
1390 #endif
1391
1392 /* User may want to use these so they are not in PNG_INTERNAL. Any library
1393  * functions that are passed far data must be model independent.
1394  */
1395
1396 #ifndef PNG_ABORT
1397 #  define PNG_ABORT() abort()
1398 #endif
1399
1400 #ifdef PNG_SETJMP_SUPPORTED
1401 #  define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf)
1402 #else
1403 #  define png_jmpbuf(png_ptr) \
1404    (LIBPNG_WAS_COMPILED_WITH__PNG_SETJMP_NOT_SUPPORTED)
1405 #endif
1406
1407 #if defined(USE_FAR_KEYWORD)  /* memory model independent fns */
1408 /* use this to make far-to-near assignments */
1409 #  define CHECK   1
1410 #  define NOCHECK 0
1411 #  define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK))
1412 #  define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK))
1413 #  define png_strcpy  _fstrcpy
1414 #  define png_strncpy _fstrncpy   /* Added to v 1.2.6 */
1415 #  define png_strlen  _fstrlen
1416 #  define png_memcmp  _fmemcmp    /* SJT: added */
1417 #  define png_memcpy  _fmemcpy
1418 #  define png_memset  _fmemset
1419 #else /* use the usual functions */
1420 #  define CVT_PTR(ptr)         (ptr)
1421 #  define CVT_PTR_NOCHECK(ptr) (ptr)
1422 #  define png_strcpy  strcpy
1423 #  define png_strncpy strncpy     /* Added to v 1.2.6 */
1424 #  define png_strlen  strlen
1425 #  define png_memcmp  memcmp      /* SJT: added */
1426 #  define png_memcpy  memcpy
1427 #  define png_memset  memset
1428 #endif
1429 /* End of memory model independent support */
1430
1431 /* Just a little check that someone hasn't tried to define something
1432  * contradictory.
1433  */
1434 #if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K)
1435 #  undef PNG_ZBUF_SIZE
1436 #  define PNG_ZBUF_SIZE 65536L
1437 #endif
1438
1439 #ifdef PNG_READ_SUPPORTED
1440 /* Prior to libpng-1.0.9, this block was in pngasmrd.h */
1441 #if defined(PNG_INTERNAL)
1442
1443 /* These are the default thresholds before the MMX code kicks in; if either
1444  * rowbytes or bitdepth is below the threshold, plain C code is used.  These
1445  * can be overridden at runtime via the png_set_mmx_thresholds() call in
1446  * libpng 1.2.0 and later.  The values below were chosen by Intel.
1447  */
1448
1449 #ifndef PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT
1450 #  define PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT  128  /*  >=  */
1451 #endif
1452 #ifndef PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT
1453 #  define PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT  9    /*  >=  */
1454 #endif
1455
1456 /* Set this in the makefile for VC++ on Pentium, not here. */
1457 /* Platform must be Pentium.  Makefile must assemble and load pngvcrd.c .
1458  * MMX will be detected at run time and used if present.
1459  */
1460 #ifdef PNG_USE_PNGVCRD
1461 #  define PNG_HAVE_MMX_COMBINE_ROW
1462 #  define PNG_HAVE_MMX_READ_INTERLACE
1463 #  define PNG_HAVE_MMX_READ_FILTER_ROW
1464 #endif
1465
1466 /* Set this in the makefile for gcc/as on Pentium, not here. */
1467 /* Platform must be Pentium.  Makefile must assemble and load pnggccrd.c .
1468  * MMX will be detected at run time and used if present.
1469  */
1470 #ifdef PNG_USE_PNGGCCRD
1471 #  define PNG_HAVE_MMX_COMBINE_ROW
1472 #  define PNG_HAVE_MMX_READ_INTERLACE
1473 #  define PNG_HAVE_MMX_READ_FILTER_ROW
1474 #endif
1475 /* - see pnggccrd.c for info about what is currently enabled */
1476
1477 #endif /* PNG_INTERNAL */
1478 #endif /* PNG_READ_SUPPORTED */
1479
1480 /* Added at libpng-1.2.8 */
1481 #endif /* PNG_VERSION_INFO_ONLY */
1482
1483 #endif /* PNGCONF_H */