src/png/pngconf.h

   1
   2 /* pngconf.h - machine configurable file for libpng
   3  *
   4  * libpng version 1.2.20 - September 8, 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 #ifdef __DMC__
  23 #define PNG_NO_SNPRINTF
  24 #endif
  25
  26 /*
  27  * PNG_USER_CONFIG has to be defined on the compiler command line. This
  28  * includes the resource compiler for Windows DLL configurations.
  29  */
  30 #ifdef PNG_USER_CONFIG
  31 #  ifndef PNG_USER_PRIVATEBUILD
  32 #    define PNG_USER_PRIVATEBUILD
  33 #  endif
  34 #include "pngusr.h"
  35 #endif
  36
  37 /* PNG_CONFIGURE_LIBPNG is set by the "configure" script. */
  38 #ifdef PNG_CONFIGURE_LIBPNG
  39 #ifdef HAVE_CONFIG_H
  40 #include "config.h"
  41 #endif
  42 #endif
  43
  44 /*
  45  * Added at libpng-1.2.8
  46  *
  47  * If you create a private DLL you need to define in "pngusr.h" the followings:
  48  * #define PNG_USER_PRIVATEBUILD <Describes by whom and why this version of
  49  *        the DLL was built>
  50  *  e.g. #define PNG_USER_PRIVATEBUILD "Build by MyCompany for xyz reasons."
  51  * #define PNG_USER_DLLFNAME_POSTFIX <two-letter postfix that serve to
  52  *        distinguish your DLL from those of the official release. These
  53  *        correspond to the trailing letters that come after the version
  54  *        number and must match your private DLL name>
  55  *  e.g. // private DLL "libpng13gx.dll"
  56  *       #define PNG_USER_DLLFNAME_POSTFIX "gx"
  57  *
  58  * The following macros are also at your disposal if you want to complete the
  59  * DLL VERSIONINFO structure.
  60  * - PNG_USER_VERSIONINFO_COMMENTS
  61  * - PNG_USER_VERSIONINFO_COMPANYNAME
  62  * - PNG_USER_VERSIONINFO_LEGALTRADEMARKS
  63  */
  64
  65 #ifdef __STDC__
  66 #ifdef SPECIALBUILD
  67 #  pragma message("PNG_LIBPNG_SPECIALBUILD (and deprecated SPECIALBUILD)\
  68  are now LIBPNG reserved macros. Use PNG_USER_PRIVATEBUILD instead.")
  69 #endif
  70
  71 #ifdef PRIVATEBUILD
  72 # pragma message("PRIVATEBUILD is deprecated.\
  73  Use PNG_USER_PRIVATEBUILD instead.")
  74 # define PNG_USER_PRIVATEBUILD PRIVATEBUILD
  75 #endif
  76 #endif /* __STDC__ */
  77
  78 #ifndef PNG_VERSION_INFO_ONLY
  79
  80 /* End of material added to libpng-1.2.8 */
  81
  82 /* Added at libpng-1.2.19, removed at libpng-1.2.20 because it caused trouble
  83 #    define PNG_WARN_UNINITIALIZED_ROW 1
  84 */
  85 /* End of material added at libpng-1.2.19 */
  86
  87 /* This is the size of the compression buffer, and thus the size of
  88  * an IDAT chunk.  Make this whatever size you feel is best for your
  89  * machine.  One of these will be allocated per png_struct.  When this
  90  * is full, it writes the data to the disk, and does some other
  91  * calculations.  Making this an extremely small size will slow
  92  * the library down, but you may want to experiment to determine
  93  * where it becomes significant, if you are concerned with memory
  94  * usage.  Note that zlib allocates at least 32Kb also.  For readers,
  95  * this describes the size of the buffer available to read the data in.
  96  * Unless this gets smaller than the size of a row (compressed),
  97  * it should not make much difference how big this is.
  98  */
  99
 100 #ifndef PNG_ZBUF_SIZE
 101 #  define PNG_ZBUF_SIZE 8192
 102 #endif
 103
 104 /* Enable if you want a write-only libpng */
 105
 106 #ifndef PNG_NO_READ_SUPPORTED
 107 #  define PNG_READ_SUPPORTED
 108 #endif
 109
 110 /* Enable if you want a read-only libpng */
 111
 112 #ifndef PNG_NO_WRITE_SUPPORTED
 113 #  define PNG_WRITE_SUPPORTED
 114 #endif
 115
 116 /* Enabled by default in 1.2.0.  You can disable this if you don't need to
 117    support PNGs that are embedded in MNG datastreams */
 118 #if !defined(PNG_1_0_X) && !defined(PNG_NO_MNG_FEATURES)
 119 #  ifndef PNG_MNG_FEATURES_SUPPORTED
 120 #    define PNG_MNG_FEATURES_SUPPORTED
 121 #  endif
 122 #endif
 123
 124 #ifndef PNG_NO_FLOATING_POINT_SUPPORTED
 125 #  ifndef PNG_FLOATING_POINT_SUPPORTED
 126 #    define PNG_FLOATING_POINT_SUPPORTED
 127 #  endif
 128 #endif
 129
 130 /* If you are running on a machine where you cannot allocate more
 131  * than 64K of memory at once, uncomment this.  While libpng will not
 132  * normally need that much memory in a chunk (unless you load up a very
 133  * large file), zlib needs to know how big of a chunk it can use, and
 134  * libpng thus makes sure to check any memory allocation to verify it
 135  * will fit into memory.
 136 #define PNG_MAX_MALLOC_64K
 137  */
 138 #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
 139 #  define PNG_MAX_MALLOC_64K
 140 #endif
 141
 142 /* Special munging to support doing things the 'cygwin' way:
 143  * 'Normal' png-on-win32 defines/defaults:
 144  *   PNG_BUILD_DLL -- building dll
 145  *   PNG_USE_DLL   -- building an application, linking to dll
 146  *   (no define)   -- building static library, or building an
 147  *                    application and linking to the static lib
 148  * 'Cygwin' defines/defaults:
 149  *   PNG_BUILD_DLL -- (ignored) building the dll
 150  *   (no define)   -- (ignored) building an application, linking to the dll
 151  *   PNG_STATIC    -- (ignored) building the static lib, or building an
 152  *                    application that links to the static lib.
 153  *   ALL_STATIC    -- (ignored) building various static libs, or building an
 154  *                    application that links to the static libs.
 155  * Thus,
 156  * a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and
 157  * this bit of #ifdefs will define the 'correct' config variables based on
 158  * that. If a cygwin user *wants* to define 'PNG_USE_DLL' that's okay, but
 159  * unnecessary.
 160  *
 161  * Also, the precedence order is:
 162  *   ALL_STATIC (since we can't #undef something outside our namespace)
 163  *   PNG_BUILD_DLL
 164  *   PNG_STATIC
 165  *   (nothing) == PNG_USE_DLL
 166  *
 167  * CYGWIN (2002-01-20): The preceding is now obsolete. With the advent
 168  *   of auto-import in binutils, we no longer need to worry about
 169  *   __declspec(dllexport) / __declspec(dllimport) and friends.  Therefore,
 170  *   we don't need to worry about PNG_STATIC or ALL_STATIC when it comes
 171  *   to __declspec() stuff.  However, we DO need to worry about
 172  *   PNG_BUILD_DLL and PNG_STATIC because those change some defaults
 173  *   such as CONSOLE_IO and whether GLOBAL_ARRAYS are allowed.
 174  */
 175 #if defined(__CYGWIN__)
 176 #  if defined(ALL_STATIC)
 177 #    if defined(PNG_BUILD_DLL)
 178 #      undef PNG_BUILD_DLL
 179 #    endif
 180 #    if defined(PNG_USE_DLL)
 181 #      undef PNG_USE_DLL
 182 #    endif
 183 #    if defined(PNG_DLL)
 184 #      undef PNG_DLL
 185 #    endif
 186 #    if !defined(PNG_STATIC)
 187 #      define PNG_STATIC
 188 #    endif
 189 #  else
 190 #    if defined (PNG_BUILD_DLL)
 191 #      if defined(PNG_STATIC)
 192 #        undef PNG_STATIC
 193 #      endif
 194 #      if defined(PNG_USE_DLL)
 195 #        undef PNG_USE_DLL
 196 #      endif
 197 #      if !defined(PNG_DLL)
 198 #        define PNG_DLL
 199 #      endif
 200 #    else
 201 #      if defined(PNG_STATIC)
 202 #        if defined(PNG_USE_DLL)
 203 #          undef PNG_USE_DLL
 204 #        endif
 205 #        if defined(PNG_DLL)
 206 #          undef PNG_DLL
 207 #        endif
 208 #      else
 209 #        if !defined(PNG_USE_DLL)
 210 #          define PNG_USE_DLL
 211 #        endif
 212 #        if !defined(PNG_DLL)
 213 #          define PNG_DLL
 214 #        endif
 215 #      endif
 216 #    endif
 217 #  endif
 218 #endif
 219
 220 /* This protects us against compilers that run on a windowing system
 221  * and thus don't have or would rather us not use the stdio types:
 222  * stdin, stdout, and stderr.  The only one currently used is stderr
 223  * in png_error() and png_warning().  #defining PNG_NO_CONSOLE_IO will
 224  * prevent these from being compiled and used. #defining PNG_NO_STDIO
 225  * will also prevent these, plus will prevent the entire set of stdio
 226  * macros and functions (FILE *, printf, etc.) from being compiled and used,
 227  * unless (PNG_DEBUG > 0) has been #defined.
 228  *
 229  * #define PNG_NO_CONSOLE_IO
 230  * #define PNG_NO_STDIO
 231  */
 232
 233 #if defined(_WIN32_WCE)
 234 #  include <windows.h>
 235    /* Console I/O functions are not supported on WindowsCE */
 236 #  define PNG_NO_CONSOLE_IO
 237 #  ifdef PNG_DEBUG
 238 #    undef PNG_DEBUG
 239 #  endif
 240 #endif
 241
 242 #ifdef PNG_BUILD_DLL
 243 #  ifndef PNG_CONSOLE_IO_SUPPORTED
 244 #    ifndef PNG_NO_CONSOLE_IO
 245 #      define PNG_NO_CONSOLE_IO
 246 #    endif
 247 #  endif
 248 #endif
 249
 250 #  ifdef PNG_NO_STDIO
 251 #    ifndef PNG_NO_CONSOLE_IO
 252 #      define PNG_NO_CONSOLE_IO
 253 #    endif
 254 #    ifdef PNG_DEBUG
 255 #      if (PNG_DEBUG > 0)
 256 #        include <stdio.h>
 257 #      endif
 258 #    endif
 259 #  else
 260 #    if !defined(_WIN32_WCE)
 261 /* "stdio.h" functions are not supported on WindowsCE */
 262 #      include <stdio.h>
 263 #    endif
 264 #  endif
 265
 266 /* This macro protects us against machines that don't have function
 267  * prototypes (ie K&R style headers).  If your compiler does not handle
 268  * function prototypes, define this macro and use the included ansi2knr.
 269  * I've always been able to use _NO_PROTO as the indicator, but you may
 270  * need to drag the empty declaration out in front of here, or change the
 271  * ifdef to suit your own needs.
 272  */
 273 #ifndef PNGARG
 274
 275 #ifdef OF /* zlib prototype munger */
 276 #  define PNGARG(arglist) OF(arglist)
 277 #else
 278
 279 #ifdef _NO_PROTO
 280 #  define PNGARG(arglist) ()
 281 #  ifndef PNG_TYPECAST_NULL
 282 #     define PNG_TYPECAST_NULL
 283 #  endif
 284 #else
 285 #  define PNGARG(arglist) arglist
 286 #endif /* _NO_PROTO */
 287
 288
 289 #endif /* OF */
 290
 291 #endif /* PNGARG */
 292
 293 /* Try to determine if we are compiling on a Mac.  Note that testing for
 294  * just __MWERKS__ is not good enough, because the Codewarrior is now used
 295  * on non-Mac platforms.
 296  */
 297 #ifndef MACOS
 298 #  if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
 299       defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC)
 300 #    define MACOS
 301 #  endif
 302 #endif
 303
 304 /* enough people need this for various reasons to include it here */
 305 #if !defined(MACOS) && !defined(RISCOS) && !defined(_WIN32_WCE)
 306 #  include <sys/types.h>
 307 #endif
 308
 309 #if !defined(PNG_SETJMP_NOT_SUPPORTED) && !defined(PNG_NO_SETJMP_SUPPORTED)
 310 #  define PNG_SETJMP_SUPPORTED
 311 #endif
 312
 313 #ifdef PNG_SETJMP_SUPPORTED
 314 /* This is an attempt to force a single setjmp behaviour on Linux.  If
 315  * the X config stuff didn't define _BSD_SOURCE we wouldn't need this.
 316  */
 317
 318 #  ifdef __linux__
 319 #    ifdef _BSD_SOURCE
 320 #      define PNG_SAVE_BSD_SOURCE
 321 #      undef _BSD_SOURCE
 322 #    endif
 323 #    ifdef _SETJMP_H
 324      /* If you encounter a compiler error here, see the explanation
 325       * near the end of INSTALL.
 326       */
 327          __png.h__ already includes setjmp.h;
 328          __dont__ include it again.;
 329 #    endif
 330 #  endif /* __linux__ */
 331
 332    /* include setjmp.h for error handling */
 333 #  include <setjmp.h>
 334
 335 #  ifdef __linux__
 336 #    ifdef PNG_SAVE_BSD_SOURCE
 337 #      define _BSD_SOURCE
 338 #      undef PNG_SAVE_BSD_SOURCE
 339 #    endif
 340 #  endif /* __linux__ */
 341 #endif /* PNG_SETJMP_SUPPORTED */
 342
 343 #ifdef BSD
 344 #  include <strings.h>
 345 #else
 346 #  include <string.h>
 347 #endif
 348
 349 /* Other defines for things like memory and the like can go here.  */
 350 #ifdef PNG_INTERNAL
 351
 352 #include <stdlib.h>
 353
 354 /* The functions exported by PNG_EXTERN are PNG_INTERNAL functions, which
 355  * aren't usually used outside the library (as far as I know), so it is
 356  * debatable if they should be exported at all.  In the future, when it is
 357  * possible to have run-time registry of chunk-handling functions, some of
 358  * these will be made available again.
 359 #define PNG_EXTERN extern
 360  */
 361 #define PNG_EXTERN
 362
 363 /* Other defines specific to compilers can go here.  Try to keep
 364  * them inside an appropriate ifdef/endif pair for portability.
 365  */
 366
 367 #if defined(PNG_FLOATING_POINT_SUPPORTED)
 368 #  if defined(MACOS) && !wxOSX_USE_IPHONE
 369      /* We need to check that <math.h> hasn't already been included earlier
 370       * as it seems it doesn't agree with <fp.h>, yet we should really use
 371       * <fp.h> if possible.
 372       */
 373 #    if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__)
 374 #      include <fp.h>
 375 #    endif
 376 #  else
 377 #    include <math.h>
 378 #  endif
 379 #  if defined(_AMIGA) && defined(__SASC) && defined(_M68881)
 380      /* Amiga SAS/C: We must include builtin FPU functions when compiling using
 381       * MATH=68881
 382       */
 383 #    include <m68881.h>
 384 #  endif
 385 #endif
 386
 387 /* Codewarrior on NT has linking problems without this. */
 388 #if (defined(__MWERKS__) && defined(WIN32)) || defined(__STDC__)
 389 #  define PNG_ALWAYS_EXTERN
 390 #endif
 391
 392 /* This provides the non-ANSI (far) memory allocation routines. */
 393 #if defined(__TURBOC__) && defined(__MSDOS__)
 394 #  include <mem.h>
 395 #  include <alloc.h>
 396 #endif
 397
 398 /* I have no idea why is this necessary... */
 399 #if defined(_MSC_VER) && (defined(WIN32) || defined(_Windows) || \
 400     defined(_WINDOWS) || defined(_WIN32) || defined(__WIN32__))
 401 #  include <malloc.h>
 402 #endif
 403
 404 /* This controls how fine the dithering gets.  As this allocates
 405  * a largish chunk of memory (32K), those who are not as concerned
 406  * with dithering quality can decrease some or all of these.
 407  */
 408 #ifndef PNG_DITHER_RED_BITS
 409 #  define PNG_DITHER_RED_BITS 5
 410 #endif
 411 #ifndef PNG_DITHER_GREEN_BITS
 412 #  define PNG_DITHER_GREEN_BITS 5
 413 #endif
 414 #ifndef PNG_DITHER_BLUE_BITS
 415 #  define PNG_DITHER_BLUE_BITS 5
 416 #endif
 417
 418 /* This controls how fine the gamma correction becomes when you
 419  * are only interested in 8 bits anyway.  Increasing this value
 420  * results in more memory being used, and more pow() functions
 421  * being called to fill in the gamma tables.  Don't set this value
 422  * less then 8, and even that may not work (I haven't tested it).
 423  */
 424
 425 #ifndef PNG_MAX_GAMMA_8
 426 #  define PNG_MAX_GAMMA_8 11
 427 #endif
 428
 429 /* This controls how much a difference in gamma we can tolerate before
 430  * we actually start doing gamma conversion.
 431  */
 432 #ifndef PNG_GAMMA_THRESHOLD
 433 #  define PNG_GAMMA_THRESHOLD 0.05
 434 #endif
 435
 436 #endif /* PNG_INTERNAL */
 437
 438 /* The following uses const char * instead of char * for error
 439  * and warning message functions, so some compilers won't complain.
 440  * If you do not want to use const, define PNG_NO_CONST here.
 441  */
 442
 443 #ifndef PNG_NO_CONST
 444 #  define PNG_CONST const
 445 #else
 446 #  define PNG_CONST
 447 #endif
 448
 449 /* The following defines give you the ability to remove code from the
 450  * library that you will not be using.  I wish I could figure out how to
 451  * automate this, but I can't do that without making it seriously hard
 452  * on the users.  So if you are not using an ability, change the #define
 453  * to and #undef, and that part of the library will not be compiled.  If
 454  * your linker can't find a function, you may want to make sure the
 455  * ability is defined here.  Some of these depend upon some others being
 456  * defined.  I haven't figured out all the interactions here, so you may
 457  * have to experiment awhile to get everything to compile.  If you are
 458  * creating or using a shared library, you probably shouldn't touch this,
 459  * as it will affect the size of the structures, and this will cause bad
 460  * things to happen if the library and/or application ever change.
 461  */
 462
 463 /* Any features you will not be using can be undef'ed here */
 464
 465 /* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user
 466  * to turn it off with "*TRANSFORMS_NOT_SUPPORTED" or *PNG_NO_*_TRANSFORMS
 467  * on the compile line, then pick and choose which ones to define without
 468  * having to edit this file. It is safe to use the *TRANSFORMS_NOT_SUPPORTED
 469  * if you only want to have a png-compliant reader/writer but don't need
 470  * any of the extra transformations.  This saves about 80 kbytes in a
 471  * typical installation of the library. (PNG_NO_* form added in version
 472  * 1.0.1c, for consistency)
 473  */
 474
 475 /* The size of the png_text structure changed in libpng-1.0.6 when
 476  * iTXt support was added.  iTXt support was turned off by default through
 477  * libpng-1.2.x, to support old apps that malloc the png_text structure
 478  * instead of calling png_set_text() and letting libpng malloc it.  It
 479  * was turned on by default in libpng-1.3.0.
 480  */
 481
 482 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
 483 #  ifndef PNG_NO_iTXt_SUPPORTED
 484 #    define PNG_NO_iTXt_SUPPORTED
 485 #  endif
 486 #  ifndef PNG_NO_READ_iTXt
 487 #    define PNG_NO_READ_iTXt
 488 #  endif
 489 #  ifndef PNG_NO_WRITE_iTXt
 490 #    define PNG_NO_WRITE_iTXt
 491 #  endif
 492 #endif
 493
 494 #if !defined(PNG_NO_iTXt_SUPPORTED)
 495 #  if !defined(PNG_READ_iTXt_SUPPORTED) && !defined(PNG_NO_READ_iTXt)
 496 #    define PNG_READ_iTXt
 497 #  endif
 498 #  if !defined(PNG_WRITE_iTXt_SUPPORTED) && !defined(PNG_NO_WRITE_iTXt)
 499 #    define PNG_WRITE_iTXt
 500 #  endif
 501 #endif
 502
 503 /* The following support, added after version 1.0.0, can be turned off here en
 504  * masse by defining PNG_LEGACY_SUPPORTED in case you need binary compatibility
 505  * with old applications that require the length of png_struct and png_info
 506  * to remain unchanged.
 507  */
 508
 509 #ifdef PNG_LEGACY_SUPPORTED
 510 #  define PNG_NO_FREE_ME
 511 #  define PNG_NO_READ_UNKNOWN_CHUNKS
 512 #  define PNG_NO_WRITE_UNKNOWN_CHUNKS
 513 #  define PNG_NO_READ_USER_CHUNKS
 514 #  define PNG_NO_READ_iCCP
 515 #  define PNG_NO_WRITE_iCCP
 516 #  define PNG_NO_READ_iTXt
 517 #  define PNG_NO_WRITE_iTXt
 518 #  define PNG_NO_READ_sCAL
 519 #  define PNG_NO_WRITE_sCAL
 520 #  define PNG_NO_READ_sPLT
 521 #  define PNG_NO_WRITE_sPLT
 522 #  define PNG_NO_INFO_IMAGE
 523 #  define PNG_NO_READ_RGB_TO_GRAY
 524 #  define PNG_NO_READ_USER_TRANSFORM
 525 #  define PNG_NO_WRITE_USER_TRANSFORM
 526 #  define PNG_NO_USER_MEM
 527 #  define PNG_NO_READ_EMPTY_PLTE
 528 #  define PNG_NO_MNG_FEATURES
 529 #  define PNG_NO_FIXED_POINT_SUPPORTED
 530 #endif
 531
 532 /* Ignore attempt to turn off both floating and fixed point support */
 533 #if !defined(PNG_FLOATING_POINT_SUPPORTED) || \
 534     !defined(PNG_NO_FIXED_POINT_SUPPORTED)
 535 #  define PNG_FIXED_POINT_SUPPORTED
 536 #endif
 537
 538 #ifndef PNG_NO_FREE_ME
 539 #  define PNG_FREE_ME_SUPPORTED
 540 #endif
 541
 542 #if defined(PNG_READ_SUPPORTED)
 543
 544 #if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \
 545       !defined(PNG_NO_READ_TRANSFORMS)
 546 #  define PNG_READ_TRANSFORMS_SUPPORTED
 547 #endif
 548
 549 #ifdef PNG_READ_TRANSFORMS_SUPPORTED
 550 #  ifndef PNG_NO_READ_EXPAND
 551 #    define PNG_READ_EXPAND_SUPPORTED
 552 #  endif
 553 #  ifndef PNG_NO_READ_SHIFT
 554 #    define PNG_READ_SHIFT_SUPPORTED
 555 #  endif
 556 #  ifndef PNG_NO_READ_PACK
 557 #    define PNG_READ_PACK_SUPPORTED
 558 #  endif
 559 #  ifndef PNG_NO_READ_BGR
 560 #    define PNG_READ_BGR_SUPPORTED
 561 #  endif
 562 #  ifndef PNG_NO_READ_SWAP
 563 #    define PNG_READ_SWAP_SUPPORTED
 564 #  endif
 565 #  ifndef PNG_NO_READ_PACKSWAP
 566 #    define PNG_READ_PACKSWAP_SUPPORTED
 567 #  endif
 568 #  ifndef PNG_NO_READ_INVERT
 569 #    define PNG_READ_INVERT_SUPPORTED
 570 #  endif
 571 #  ifndef PNG_NO_READ_DITHER
 572 #    define PNG_READ_DITHER_SUPPORTED
 573 #  endif
 574 #  ifndef PNG_NO_READ_BACKGROUND
 575 #    define PNG_READ_BACKGROUND_SUPPORTED
 576 #  endif
 577 #  ifndef PNG_NO_READ_16_TO_8
 578 #    define PNG_READ_16_TO_8_SUPPORTED
 579 #  endif
 580 #  ifndef PNG_NO_READ_FILLER
 581 #    define PNG_READ_FILLER_SUPPORTED
 582 #  endif
 583 #  ifndef PNG_NO_READ_GAMMA
 584 #    define PNG_READ_GAMMA_SUPPORTED
 585 #  endif
 586 #  ifndef PNG_NO_READ_GRAY_TO_RGB
 587 #    define PNG_READ_GRAY_TO_RGB_SUPPORTED
 588 #  endif
 589 #  ifndef PNG_NO_READ_SWAP_ALPHA
 590 #    define PNG_READ_SWAP_ALPHA_SUPPORTED
 591 #  endif
 592 #  ifndef PNG_NO_READ_INVERT_ALPHA
 593 #    define PNG_READ_INVERT_ALPHA_SUPPORTED
 594 #  endif
 595 #  ifndef PNG_NO_READ_STRIP_ALPHA
 596 #    define PNG_READ_STRIP_ALPHA_SUPPORTED
 597 #  endif
 598 #  ifndef PNG_NO_READ_USER_TRANSFORM
 599 #    define PNG_READ_USER_TRANSFORM_SUPPORTED
 600 #  endif
 601 #  ifndef PNG_NO_READ_RGB_TO_GRAY
 602 #    define PNG_READ_RGB_TO_GRAY_SUPPORTED
 603 #  endif
 604 #endif /* PNG_READ_TRANSFORMS_SUPPORTED */
 605
 606 #if !defined(PNG_NO_PROGRESSIVE_READ) && \
 607  !defined(PNG_PROGRESSIVE_READ_SUPPORTED) /* if you don't do progressive   */
 608 #  define PNG_PROGRESSIVE_READ_SUPPORTED  /* reading.  This is not talking */
 609 #endif                            /* about interlacing capability!  You'll */
 610            /* still have interlacing unless you change the following line: */
 611
 612 #define PNG_READ_INTERLACING_SUPPORTED /* required in PNG-compliant decoders */
 613
 614 #ifndef PNG_NO_READ_COMPOSITE_NODIV
 615 #  ifndef PNG_NO_READ_COMPOSITED_NODIV  /* libpng-1.0.x misspelling */
 616 #    define PNG_READ_COMPOSITE_NODIV_SUPPORTED  /* well tested on Intel, SGI */
 617 #  endif
 618 #endif
 619
 620 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
 621 /* Deprecated, will be removed from version 2.0.0.
 622    Use PNG_MNG_FEATURES_SUPPORTED instead. */
 623 #ifndef PNG_NO_READ_EMPTY_PLTE
 624 #  define PNG_READ_EMPTY_PLTE_SUPPORTED
 625 #endif
 626 #endif
 627
 628 #endif /* PNG_READ_SUPPORTED */
 629
 630 #if defined(PNG_WRITE_SUPPORTED)
 631
 632 # if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \
 633     !defined(PNG_NO_WRITE_TRANSFORMS)
 634 #  define PNG_WRITE_TRANSFORMS_SUPPORTED
 635 #endif
 636
 637 #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
 638 #  ifndef PNG_NO_WRITE_SHIFT
 639 #    define PNG_WRITE_SHIFT_SUPPORTED
 640 #  endif
 641 #  ifndef PNG_NO_WRITE_PACK
 642 #    define PNG_WRITE_PACK_SUPPORTED
 643 #  endif
 644 #  ifndef PNG_NO_WRITE_BGR
 645 #    define PNG_WRITE_BGR_SUPPORTED
 646 #  endif
 647 #  ifndef PNG_NO_WRITE_SWAP
 648 #    define PNG_WRITE_SWAP_SUPPORTED
 649 #  endif
 650 #  ifndef PNG_NO_WRITE_PACKSWAP
 651 #    define PNG_WRITE_PACKSWAP_SUPPORTED
 652 #  endif
 653 #  ifndef PNG_NO_WRITE_INVERT
 654 #    define PNG_WRITE_INVERT_SUPPORTED
 655 #  endif
 656 #  ifndef PNG_NO_WRITE_FILLER
 657 #    define PNG_WRITE_FILLER_SUPPORTED   /* same as WRITE_STRIP_ALPHA */
 658 #  endif
 659 #  ifndef PNG_NO_WRITE_SWAP_ALPHA
 660 #    define PNG_WRITE_SWAP_ALPHA_SUPPORTED
 661 #  endif
 662 #  ifndef PNG_NO_WRITE_INVERT_ALPHA
 663 #    define PNG_WRITE_INVERT_ALPHA_SUPPORTED
 664 #  endif
 665 #  ifndef PNG_NO_WRITE_USER_TRANSFORM
 666 #    define PNG_WRITE_USER_TRANSFORM_SUPPORTED
 667 #  endif
 668 #endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */
 669
 670 #if !defined(PNG_NO_WRITE_INTERLACING_SUPPORTED) && \
 671     !defined(PNG_WRITE_INTERLACING_SUPPORTED)
 672 #define PNG_WRITE_INTERLACING_SUPPORTED  /* not required for PNG-compliant
 673                                             encoders, but can cause trouble
 674                                             if left undefined */
 675 #endif
 676
 677 #if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \
 678     !defined(PNG_WRITE_WEIGHTED_FILTER) && \
 679      defined(PNG_FLOATING_POINT_SUPPORTED)
 680 #  define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
 681 #endif
 682
 683 #ifndef PNG_NO_WRITE_FLUSH
 684 #  define PNG_WRITE_FLUSH_SUPPORTED
 685 #endif
 686
 687 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
 688 /* Deprecated, see PNG_MNG_FEATURES_SUPPORTED, above */
 689 #ifndef PNG_NO_WRITE_EMPTY_PLTE
 690 #  define PNG_WRITE_EMPTY_PLTE_SUPPORTED
 691 #endif
 692 #endif
 693
 694 #endif /* PNG_WRITE_SUPPORTED */
 695
 696 #ifndef PNG_1_0_X
 697 #  ifndef PNG_NO_ERROR_NUMBERS
 698 #    define PNG_ERROR_NUMBERS_SUPPORTED
 699 #  endif
 700 #endif /* PNG_1_0_X */
 701
 702 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
 703     defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
 704 #  ifndef PNG_NO_USER_TRANSFORM_PTR
 705 #    define PNG_USER_TRANSFORM_PTR_SUPPORTED
 706 #  endif
 707 #endif
 708
 709 #ifndef PNG_NO_STDIO
 710 #  define PNG_TIME_RFC1123_SUPPORTED
 711 #endif
 712
 713 /* This adds extra functions in pngget.c for accessing data from the
 714  * info pointer (added in version 0.99)
 715  * png_get_image_width()
 716  * png_get_image_height()
 717  * png_get_bit_depth()
 718  * png_get_color_type()
 719  * png_get_compression_type()
 720  * png_get_filter_type()
 721  * png_get_interlace_type()
 722  * png_get_pixel_aspect_ratio()
 723  * png_get_pixels_per_meter()
 724  * png_get_x_offset_pixels()
 725  * png_get_y_offset_pixels()
 726  * png_get_x_offset_microns()
 727  * png_get_y_offset_microns()
 728  */
 729 #if !defined(PNG_NO_EASY_ACCESS) && !defined(PNG_EASY_ACCESS_SUPPORTED)
 730 #  define PNG_EASY_ACCESS_SUPPORTED
 731 #endif
 732
 733 /* PNG_ASSEMBLER_CODE was enabled by default in version 1.2.0
 734  * and removed from version 1.2.20.  The following will be removed
 735  * from libpng-1.4.0
 736 */
 737
 738 #if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_OPTIMIZED_CODE)
 739 #  ifndef PNG_OPTIMIZED_CODE_SUPPORTED
 740 #    define PNG_OPTIMIZED_CODE_SUPPORTED
 741 #  endif
 742 #endif
 743
 744 #if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_ASSEMBLER_CODE)
 745 #  ifndef PNG_ASSEMBLER_CODE_SUPPORTED
 746 #    define PNG_ASSEMBLER_CODE_SUPPORTED
 747 #  endif
 748
 749 #  if defined(__GNUC__) && defined(__x86_64__) && (__GNUC__ < 4)
 750      /* work around 64-bit gcc compiler bugs in gcc-3.x */
 751 #    if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
 752 #      define PNG_NO_MMX_CODE
 753 #    endif
 754 #  endif
 755
 756 #  if defined(__APPLE__)
 757 #    if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
 758 #      define PNG_NO_MMX_CODE
 759 #    endif
 760 #  endif
 761
 762 #  if (defined(__MWERKS__) && ((__MWERKS__ < 0x0900) || macintosh))
 763 #    if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
 764 #      define PNG_NO_MMX_CODE
 765 #    endif
 766 #  endif
 767
 768 #  if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
 769 #    define PNG_MMX_CODE_SUPPORTED
 770 #  endif
 771
 772 #endif
 773 /* end of obsolete code to be removed from libpng-1.4.0 */
 774
 775 #if !defined(PNG_1_0_X)
 776 #if !defined(PNG_NO_USER_MEM) && !defined(PNG_USER_MEM_SUPPORTED)
 777 #  define PNG_USER_MEM_SUPPORTED
 778 #endif
 779 #endif /* PNG_1_0_X */
 780
 781 /* Added at libpng-1.2.6 */
 782 #if !defined(PNG_1_0_X)
 783 #ifndef PNG_SET_USER_LIMITS_SUPPORTED
 784 #if !defined(PNG_NO_SET_USER_LIMITS) && !defined(PNG_SET_USER_LIMITS_SUPPORTED)
 785 #  define PNG_SET_USER_LIMITS_SUPPORTED
 786 #endif
 787 #endif
 788 #endif /* PNG_1_0_X */
 789
 790 /* Added at libpng-1.0.16 and 1.2.6.  To accept all valid PNGS no matter
 791  * how large, set these limits to 0x7fffffffL
 792  */
 793 #ifndef PNG_USER_WIDTH_MAX
 794 #  define PNG_USER_WIDTH_MAX 1000000L
 795 #endif
 796 #ifndef PNG_USER_HEIGHT_MAX
 797 #  define PNG_USER_HEIGHT_MAX 1000000L
 798 #endif
 799
 800 /* These are currently experimental features, define them if you want */
 801
 802 /* very little testing */
 803 /*
 804 #ifdef PNG_READ_SUPPORTED
 805 #  ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
 806 #    define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
 807 #  endif
 808 #endif
 809 */
 810
 811 /* This is only for PowerPC big-endian and 680x0 systems */
 812 /* some testing */
 813 /*
 814 #ifndef PNG_READ_BIG_ENDIAN_SUPPORTED
 815 #  define PNG_READ_BIG_ENDIAN_SUPPORTED
 816 #endif
 817 */
 818
 819 /* Buggy compilers (e.g., gcc 2.7.2.2) need this */
 820 /*
 821 #define PNG_NO_POINTER_INDEXING
 822 */
 823
 824 /* These functions are turned off by default, as they will be phased out. */
 825 /*
 826 #define  PNG_USELESS_TESTS_SUPPORTED
 827 #define  PNG_CORRECT_PALETTE_SUPPORTED
 828 */
 829
 830 /* Any chunks you are not interested in, you can undef here.  The
 831  * ones that allocate memory may be expecially important (hIST,
 832  * tEXt, zTXt, tRNS, pCAL).  Others will just save time and make png_info
 833  * a bit smaller.
 834  */
 835
 836 #if defined(PNG_READ_SUPPORTED) && \
 837     !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
 838     !defined(PNG_NO_READ_ANCILLARY_CHUNKS)
 839 #  define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
 840 #endif
 841
 842 #if defined(PNG_WRITE_SUPPORTED) && \
 843     !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
 844     !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS)
 845 #  define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
 846 #endif
 847
 848 #ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
 849
 850 #ifdef PNG_NO_READ_TEXT
 851 #  define PNG_NO_READ_iTXt
 852 #  define PNG_NO_READ_tEXt
 853 #  define PNG_NO_READ_zTXt
 854 #endif
 855 #ifndef PNG_NO_READ_bKGD
 856 #  define PNG_READ_bKGD_SUPPORTED
 857 #  define PNG_bKGD_SUPPORTED
 858 #endif
 859 #ifndef PNG_NO_READ_cHRM
 860 #  define PNG_READ_cHRM_SUPPORTED
 861 #  define PNG_cHRM_SUPPORTED
 862 #endif
 863 #ifndef PNG_NO_READ_gAMA
 864 #  define PNG_READ_gAMA_SUPPORTED
 865 #  define PNG_gAMA_SUPPORTED
 866 #endif
 867 #ifndef PNG_NO_READ_hIST
 868 #  define PNG_READ_hIST_SUPPORTED
 869 #  define PNG_hIST_SUPPORTED
 870 #endif
 871 #ifndef PNG_NO_READ_iCCP
 872 #  define PNG_READ_iCCP_SUPPORTED
 873 #  define PNG_iCCP_SUPPORTED
 874 #endif
 875 #ifndef PNG_NO_READ_iTXt
 876 #  ifndef PNG_READ_iTXt_SUPPORTED
 877 #    define PNG_READ_iTXt_SUPPORTED
 878 #  endif
 879 #  ifndef PNG_iTXt_SUPPORTED
 880 #    define PNG_iTXt_SUPPORTED
 881 #  endif
 882 #endif
 883 #ifndef PNG_NO_READ_oFFs
 884 #  define PNG_READ_oFFs_SUPPORTED
 885 #  define PNG_oFFs_SUPPORTED
 886 #endif
 887 #ifndef PNG_NO_READ_pCAL
 888 #  define PNG_READ_pCAL_SUPPORTED
 889 #  define PNG_pCAL_SUPPORTED
 890 #endif
 891 #ifndef PNG_NO_READ_sCAL
 892 #  define PNG_READ_sCAL_SUPPORTED
 893 #  define PNG_sCAL_SUPPORTED
 894 #endif
 895 #ifndef PNG_NO_READ_pHYs
 896 #  define PNG_READ_pHYs_SUPPORTED
 897 #  define PNG_pHYs_SUPPORTED
 898 #endif
 899 #ifndef PNG_NO_READ_sBIT
 900 #  define PNG_READ_sBIT_SUPPORTED
 901 #  define PNG_sBIT_SUPPORTED
 902 #endif
 903 #ifndef PNG_NO_READ_sPLT
 904 #  define PNG_READ_sPLT_SUPPORTED
 905 #  define PNG_sPLT_SUPPORTED
 906 #endif
 907 #ifndef PNG_NO_READ_sRGB
 908 #  define PNG_READ_sRGB_SUPPORTED
 909 #  define PNG_sRGB_SUPPORTED
 910 #endif
 911 #ifndef PNG_NO_READ_tEXt
 912 #  define PNG_READ_tEXt_SUPPORTED
 913 #  define PNG_tEXt_SUPPORTED
 914 #endif
 915 #ifndef PNG_NO_READ_tIME
 916 #  define PNG_READ_tIME_SUPPORTED
 917 #  define PNG_tIME_SUPPORTED
 918 #endif
 919 #ifndef PNG_NO_READ_tRNS
 920 #  define PNG_READ_tRNS_SUPPORTED
 921 #  define PNG_tRNS_SUPPORTED
 922 #endif
 923 #ifndef PNG_NO_READ_zTXt
 924 #  define PNG_READ_zTXt_SUPPORTED
 925 #  define PNG_zTXt_SUPPORTED
 926 #endif
 927 #ifndef PNG_NO_READ_UNKNOWN_CHUNKS
 928 #  define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
 929 #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
 930 #    define PNG_UNKNOWN_CHUNKS_SUPPORTED
 931 #  endif
 932 #  ifndef PNG_NO_HANDLE_AS_UNKNOWN
 933 #    define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
 934 #  endif
 935 #endif
 936 #if !defined(PNG_NO_READ_USER_CHUNKS) && \
 937      defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
 938 #  define PNG_READ_USER_CHUNKS_SUPPORTED
 939 #  define PNG_USER_CHUNKS_SUPPORTED
 940 #  ifdef PNG_NO_READ_UNKNOWN_CHUNKS
 941 #    undef PNG_NO_READ_UNKNOWN_CHUNKS
 942 #  endif
 943 #  ifdef PNG_NO_HANDLE_AS_UNKNOWN
 944 #    undef PNG_NO_HANDLE_AS_UNKNOWN
 945 #  endif
 946 #endif
 947 #ifndef PNG_NO_READ_OPT_PLTE
 948 #  define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */
 949 #endif                      /* optional PLTE chunk in RGB and RGBA images */
 950 #if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \
 951     defined(PNG_READ_zTXt_SUPPORTED)
 952 #  define PNG_READ_TEXT_SUPPORTED
 953 #  define PNG_TEXT_SUPPORTED
 954 #endif
 955
 956 #endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */
 957
 958 #ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
 959
 960 #ifdef PNG_NO_WRITE_TEXT
 961 #  define PNG_NO_WRITE_iTXt
 962 #  define PNG_NO_WRITE_tEXt
 963 #  define PNG_NO_WRITE_zTXt
 964 #endif
 965 #ifndef PNG_NO_WRITE_bKGD
 966 #  define PNG_WRITE_bKGD_SUPPORTED
 967 #  ifndef PNG_bKGD_SUPPORTED
 968 #    define PNG_bKGD_SUPPORTED
 969 #  endif
 970 #endif
 971 #ifndef PNG_NO_WRITE_cHRM
 972 #  define PNG_WRITE_cHRM_SUPPORTED
 973 #  ifndef PNG_cHRM_SUPPORTED
 974 #    define PNG_cHRM_SUPPORTED
 975 #  endif
 976 #endif
 977 #ifndef PNG_NO_WRITE_gAMA
 978 #  define PNG_WRITE_gAMA_SUPPORTED
 979 #  ifndef PNG_gAMA_SUPPORTED
 980 #    define PNG_gAMA_SUPPORTED
 981 #  endif
 982 #endif
 983 #ifndef PNG_NO_WRITE_hIST
 984 #  define PNG_WRITE_hIST_SUPPORTED
 985 #  ifndef PNG_hIST_SUPPORTED
 986 #    define PNG_hIST_SUPPORTED
 987 #  endif
 988 #endif
 989 #ifndef PNG_NO_WRITE_iCCP
 990 #  define PNG_WRITE_iCCP_SUPPORTED
 991 #  ifndef PNG_iCCP_SUPPORTED
 992 #    define PNG_iCCP_SUPPORTED
 993 #  endif
 994 #endif
 995 #ifndef PNG_NO_WRITE_iTXt
 996 #  ifndef PNG_WRITE_iTXt_SUPPORTED
 997 #    define PNG_WRITE_iTXt_SUPPORTED
 998 #  endif
 999 #  ifndef PNG_iTXt_SUPPORTED
1000 #    define PNG_iTXt_SUPPORTED
1001 #  endif
1002 #endif
1003 #ifndef PNG_NO_WRITE_oFFs
1004 #  define PNG_WRITE_oFFs_SUPPORTED
1005 #  ifndef PNG_oFFs_SUPPORTED
1006 #    define PNG_oFFs_SUPPORTED
1007 #  endif
1008 #endif
1009 #ifndef PNG_NO_WRITE_pCAL
1010 #  define PNG_WRITE_pCAL_SUPPORTED
1011 #  ifndef PNG_pCAL_SUPPORTED
1012 #    define PNG_pCAL_SUPPORTED
1013 #  endif
1014 #endif
1015 #ifndef PNG_NO_WRITE_sCAL
1016 #  define PNG_WRITE_sCAL_SUPPORTED
1017 #  ifndef PNG_sCAL_SUPPORTED
1018 #    define PNG_sCAL_SUPPORTED
1019 #  endif
1020 #endif
1021 #ifndef PNG_NO_WRITE_pHYs
1022 #  define PNG_WRITE_pHYs_SUPPORTED
1023 #  ifndef PNG_pHYs_SUPPORTED
1024 #    define PNG_pHYs_SUPPORTED
1025 #  endif
1026 #endif
1027 #ifndef PNG_NO_WRITE_sBIT
1028 #  define PNG_WRITE_sBIT_SUPPORTED
1029 #  ifndef PNG_sBIT_SUPPORTED
1030 #    define PNG_sBIT_SUPPORTED
1031 #  endif
1032 #endif
1033 #ifndef PNG_NO_WRITE_sPLT
1034 #  define PNG_WRITE_sPLT_SUPPORTED
1035 #  ifndef PNG_sPLT_SUPPORTED
1036 #    define PNG_sPLT_SUPPORTED
1037 #  endif
1038 #endif
1039 #ifndef PNG_NO_WRITE_sRGB
1040 #  define PNG_WRITE_sRGB_SUPPORTED
1041 #  ifndef PNG_sRGB_SUPPORTED
1042 #    define PNG_sRGB_SUPPORTED
1043 #  endif
1044 #endif
1045 #ifndef PNG_NO_WRITE_tEXt
1046 #  define PNG_WRITE_tEXt_SUPPORTED
1047 #  ifndef PNG_tEXt_SUPPORTED
1048 #    define PNG_tEXt_SUPPORTED
1049 #  endif
1050 #endif
1051 #ifndef PNG_NO_WRITE_tIME
1052 #  define PNG_WRITE_tIME_SUPPORTED
1053 #  ifndef PNG_tIME_SUPPORTED
1054 #    define PNG_tIME_SUPPORTED
1055 #  endif
1056 #endif
1057 #ifndef PNG_NO_WRITE_tRNS
1058 #  define PNG_WRITE_tRNS_SUPPORTED
1059 #  ifndef PNG_tRNS_SUPPORTED
1060 #    define PNG_tRNS_SUPPORTED
1061 #  endif
1062 #endif
1063 #ifndef PNG_NO_WRITE_zTXt
1064 #  define PNG_WRITE_zTXt_SUPPORTED
1065 #  ifndef PNG_zTXt_SUPPORTED
1066 #    define PNG_zTXt_SUPPORTED
1067 #  endif
1068 #endif
1069 #ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS
1070 #  define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1071 #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
1072 #    define PNG_UNKNOWN_CHUNKS_SUPPORTED
1073 #  endif
1074 #  ifndef PNG_NO_HANDLE_AS_UNKNOWN
1075 #     ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1076 #       define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1077 #     endif
1078 #  endif
1079 #endif
1080 #if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
1081     defined(PNG_WRITE_zTXt_SUPPORTED)
1082 #  define PNG_WRITE_TEXT_SUPPORTED
1083 #  ifndef PNG_TEXT_SUPPORTED
1084 #    define PNG_TEXT_SUPPORTED
1085 #  endif
1086 #endif
1087
1088 #endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */
1089
1090 /* Turn this off to disable png_read_png() and
1091  * png_write_png() and leave the row_pointers member
1092  * out of the info structure.
1093  */
1094 #ifndef PNG_NO_INFO_IMAGE
1095 #  define PNG_INFO_IMAGE_SUPPORTED
1096 #endif
1097
1098 /* need the time information for reading tIME chunks */
1099 #if defined(PNG_tIME_SUPPORTED)
1100 #  if !defined(_WIN32_WCE)
1101      /* "time.h" functions are not supported on WindowsCE */
1102 #    include <time.h>
1103 #  endif
1104 #endif
1105
1106 /* Some typedefs to get us started.  These should be safe on most of the
1107  * common platforms.  The typedefs should be at least as large as the
1108  * numbers suggest (a png_uint_32 must be at least 32 bits long), but they
1109  * don't have to be exactly that size.  Some compilers dislike passing
1110  * unsigned shorts as function parameters, so you may be better off using
1111  * unsigned int for png_uint_16.  Likewise, for 64-bit systems, you may
1112  * want to have unsigned int for png_uint_32 instead of unsigned long.
1113  */
1114
1115 typedef unsigned long png_uint_32;
1116 typedef long png_int_32;
1117 typedef unsigned short png_uint_16;
1118 typedef short png_int_16;
1119 typedef unsigned char png_byte;
1120
1121 /* This is usually size_t.  It is typedef'ed just in case you need it to
1122    change (I'm not sure if you will or not, so I thought I'd be safe) */
1123 #ifdef PNG_SIZE_T
1124    typedef PNG_SIZE_T png_size_t;
1125 #  define png_sizeof(x) png_convert_size(sizeof (x))
1126 #else
1127    typedef size_t png_size_t;
1128 #  define png_sizeof(x) sizeof (x)
1129 #endif
1130
1131 /* The following is needed for medium model support.  It cannot be in the
1132  * PNG_INTERNAL section.  Needs modification for other compilers besides
1133  * MSC.  Model independent support declares all arrays and pointers to be
1134  * large using the far keyword.  The zlib version used must also support
1135  * model independent data.  As of version zlib 1.0.4, the necessary changes
1136  * have been made in zlib.  The USE_FAR_KEYWORD define triggers other
1137  * changes that are needed. (Tim Wegner)
1138  */
1139
1140 /* Separate compiler dependencies (problem here is that zlib.h always
1141    defines FAR. (SJT) */
1142 #ifdef __BORLANDC__
1143 #  if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)
1144 #    define LDATA 1
1145 #  else
1146 #    define LDATA 0
1147 #  endif
1148    /* GRR:  why is Cygwin in here?  Cygwin is not Borland C... */
1149 #  if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)
1150 #    define PNG_MAX_MALLOC_64K
1151 #    if (LDATA != 1)
1152 #      ifndef FAR
1153 #        define FAR __far
1154 #      endif
1155 #      define USE_FAR_KEYWORD
1156 #    endif   /* LDATA != 1 */
1157      /* Possibly useful for moving data out of default segment.
1158       * Uncomment it if you want. Could also define FARDATA as
1159       * const if your compiler supports it. (SJT)
1160 #    define FARDATA FAR
1161       */
1162 #  endif  /* __WIN32__, __FLAT__, __CYGWIN__ */
1163 #endif   /* __BORLANDC__ */
1164
1165
1166 /* Suggest testing for specific compiler first before testing for
1167  * FAR.  The Watcom compiler defines both __MEDIUM__ and M_I86MM,
1168  * making reliance oncertain keywords suspect. (SJT)
1169  */
1170
1171 /* MSC Medium model */
1172 #if defined(FAR)
1173 #  if defined(M_I86MM)
1174 #    define USE_FAR_KEYWORD
1175 #    define FARDATA FAR
1176 #    include <dos.h>
1177 #  endif
1178 #endif
1179
1180 /* SJT: default case */
1181 #ifndef FAR
1182 #  define FAR
1183 #endif
1184
1185 /* At this point FAR is always defined */
1186 #ifndef FARDATA
1187 #  define FARDATA
1188 #endif
1189
1190 /* Typedef for floating-point numbers that are converted
1191    to fixed-point with a multiple of 100,000, e.g., int_gamma */
1192 typedef png_int_32 png_fixed_point;
1193
1194 /* Add typedefs for pointers */
1195 typedef void            FAR * png_voidp;
1196 typedef png_byte        FAR * png_bytep;
1197 typedef png_uint_32     FAR * png_uint_32p;
1198 typedef png_int_32      FAR * png_int_32p;
1199 typedef png_uint_16     FAR * png_uint_16p;
1200 typedef png_int_16      FAR * png_int_16p;
1201 typedef PNG_CONST char  FAR * png_const_charp;
1202 typedef char            FAR * png_charp;
1203 typedef png_fixed_point FAR * png_fixed_point_p;
1204
1205 #ifndef PNG_NO_STDIO
1206 #if defined(_WIN32_WCE)
1207 typedef HANDLE                png_FILE_p;
1208 #else
1209 typedef FILE                * png_FILE_p;
1210 #endif
1211 #endif
1212
1213 #ifdef PNG_FLOATING_POINT_SUPPORTED
1214 typedef double          FAR * png_doublep;
1215 #endif
1216
1217 /* Pointers to pointers; i.e. arrays */
1218 typedef png_byte        FAR * FAR * png_bytepp;
1219 typedef png_uint_32     FAR * FAR * png_uint_32pp;
1220 typedef png_int_32      FAR * FAR * png_int_32pp;
1221 typedef png_uint_16     FAR * FAR * png_uint_16pp;
1222 typedef png_int_16      FAR * FAR * png_int_16pp;
1223 typedef PNG_CONST char  FAR * FAR * png_const_charpp;
1224 typedef char            FAR * FAR * png_charpp;
1225 typedef png_fixed_point FAR * FAR * png_fixed_point_pp;
1226 #ifdef PNG_FLOATING_POINT_SUPPORTED
1227 typedef double          FAR * FAR * png_doublepp;
1228 #endif
1229
1230 /* Pointers to pointers to pointers; i.e., pointer to array */
1231 typedef char            FAR * FAR * FAR * png_charppp;
1232
1233 #if defined(PNG_1_0_X) || defined(PNG_1_2_X)
1234 /* SPC -  Is this stuff deprecated? */
1235 /* It'll be removed as of libpng-1.3.0 - GR-P */
1236 /* libpng typedefs for types in zlib. If zlib changes
1237  * or another compression library is used, then change these.
1238  * Eliminates need to change all the source files.
1239  */
1240 typedef charf *         png_zcharp;
1241 typedef charf * FAR *   png_zcharpp;
1242 typedef z_stream FAR *  png_zstreamp;
1243 #endif /* (PNG_1_0_X) || defined(PNG_1_2_X) */
1244
1245 /*
1246  * Define PNG_BUILD_DLL if the module being built is a Windows
1247  * LIBPNG DLL.
1248  *
1249  * Define PNG_USE_DLL if you want to *link* to the Windows LIBPNG DLL.
1250  * It is equivalent to Microsoft predefined macro _DLL that is
1251  * automatically defined when you compile using the share
1252  * version of the CRT (C Run-Time library)
1253  *
1254  * The cygwin mods make this behavior a little different:
1255  * Define PNG_BUILD_DLL if you are building a dll for use with cygwin
1256  * Define PNG_STATIC if you are building a static library for use with cygwin,
1257  *   -or- if you are building an application that you want to link to the
1258  *   static library.
1259  * PNG_USE_DLL is defined by default (no user action needed) unless one of
1260  *   the other flags is defined.
1261  */
1262
1263 #if !defined(PNG_DLL) && (defined(PNG_BUILD_DLL) || defined(PNG_USE_DLL))
1264 #  define PNG_DLL
1265 #endif
1266 /* If CYGWIN, then disallow GLOBAL ARRAYS unless building a static lib.
1267  * When building a static lib, default to no GLOBAL ARRAYS, but allow
1268  * command-line override
1269  */
1270 #if defined(__CYGWIN__)
1271 #  if !defined(PNG_STATIC)
1272 #    if defined(PNG_USE_GLOBAL_ARRAYS)
1273 #      undef PNG_USE_GLOBAL_ARRAYS
1274 #    endif
1275 #    if !defined(PNG_USE_LOCAL_ARRAYS)
1276 #      define PNG_USE_LOCAL_ARRAYS
1277 #    endif
1278 #  else
1279 #    if defined(PNG_USE_LOCAL_ARRAYS) || defined(PNG_NO_GLOBAL_ARRAYS)
1280 #      if defined(PNG_USE_GLOBAL_ARRAYS)
1281 #        undef PNG_USE_GLOBAL_ARRAYS
1282 #      endif
1283 #    endif
1284 #  endif
1285 #  if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1286 #    define PNG_USE_LOCAL_ARRAYS
1287 #  endif
1288 #endif
1289
1290 /* Do not use global arrays (helps with building DLL's)
1291  * They are no longer used in libpng itself, since version 1.0.5c,
1292  * but might be required for some pre-1.0.5c applications.
1293  */
1294 #if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1295 #  if defined(PNG_NO_GLOBAL_ARRAYS) || \
1296       (defined(__GNUC__) && defined(PNG_DLL)) || defined(_MSC_VER)
1297 #    define PNG_USE_LOCAL_ARRAYS
1298 #  else
1299 #    define PNG_USE_GLOBAL_ARRAYS
1300 #  endif
1301 #endif
1302
1303 #if defined(__CYGWIN__)
1304 #  undef PNGAPI
1305 #  define PNGAPI __cdecl
1306 #  undef PNG_IMPEXP
1307 #  define PNG_IMPEXP
1308 #endif
1309
1310 /* If you define PNGAPI, e.g., with compiler option "-DPNGAPI=__stdcall",
1311  * you may get warnings regarding the linkage of png_zalloc and png_zfree.
1312  * Don't ignore those warnings; you must also reset the default calling
1313  * convention in your compiler to match your PNGAPI, and you must build
1314  * zlib and your applications the same way you build libpng.
1315  */
1316
1317 #if defined(__MINGW32__) && !defined(PNG_MODULEDEF)
1318 #  ifndef PNG_NO_MODULEDEF
1319 #    define PNG_NO_MODULEDEF
1320 #  endif
1321 #endif
1322
1323 #if !defined(PNG_IMPEXP) && defined(PNG_BUILD_DLL) && !defined(PNG_NO_MODULEDEF)
1324 #  define PNG_IMPEXP
1325 #endif
1326
1327 #if defined(PNG_DLL) || defined(_DLL) || defined(__DLL__ ) || \
1328     (( defined(_Windows) || defined(_WINDOWS) || \
1329        defined(WIN32) || defined(_WIN32) || defined(__WIN32__) ))
1330
1331 #  ifndef PNGAPI
1332 #     if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
1333 #        define PNGAPI __cdecl
1334 #     else
1335 #        define PNGAPI _cdecl
1336 #     endif
1337 #  endif
1338
1339 #  if !defined(PNG_IMPEXP) && (!defined(PNG_DLL) || \
1340        0 /* WINCOMPILER_WITH_NO_SUPPORT_FOR_DECLIMPEXP */)
1341 #     define PNG_IMPEXP
1342 #  endif
1343
1344 #  if !defined(PNG_IMPEXP)
1345
1346 #     define PNG_EXPORT_TYPE1(type,symbol)  PNG_IMPEXP type PNGAPI symbol
1347 #     define PNG_EXPORT_TYPE2(type,symbol)  type PNG_IMPEXP PNGAPI symbol
1348
1349       /* Borland/Microsoft */
1350 #     if defined(_MSC_VER) || defined(__BORLANDC__)
1351 #        if (_MSC_VER >= 800) || (__BORLANDC__ >= 0x500)
1352 #           define PNG_EXPORT PNG_EXPORT_TYPE1
1353 #        else
1354 #           define PNG_EXPORT PNG_EXPORT_TYPE2
1355 #           if defined(PNG_BUILD_DLL)
1356 #              define PNG_IMPEXP __export
1357 #           else
1358 #              define PNG_IMPEXP /*__import */ /* doesn't exist AFAIK in
1359                                                  VC++ */
1360 #           endif                             /* Exists in Borland C++ for
1361                                                  C++ classes (== huge) */
1362 #        endif
1363 #     endif
1364
1365 #     if !defined(PNG_IMPEXP)
1366 #        if defined(PNG_BUILD_DLL)
1367 #           define PNG_IMPEXP __declspec(dllexport)
1368 #        else
1369 #           define PNG_IMPEXP __declspec(dllimport)
1370 #        endif
1371 #     endif
1372 #  endif  /* PNG_IMPEXP */
1373 #else /* !(DLL || non-cygwin WINDOWS) */
1374 #   if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
1375 #      ifndef PNGAPI
1376 #         define PNGAPI _System
1377 #      endif
1378 #   else
1379 #      if 0 /* ... other platforms, with other meanings */
1380 #      endif
1381 #   endif
1382 #endif
1383
1384 #ifndef PNGAPI
1385 #  define PNGAPI
1386 #endif
1387 #ifndef PNG_IMPEXP
1388 #  define PNG_IMPEXP
1389 #endif
1390
1391 #ifdef PNG_BUILDSYMS
1392 #  ifndef PNG_EXPORT
1393 #    define PNG_EXPORT(type,symbol) PNG_FUNCTION_EXPORT symbol END
1394 #  endif
1395 #  ifdef PNG_USE_GLOBAL_ARRAYS
1396 #    ifndef PNG_EXPORT_VAR
1397 #      define PNG_EXPORT_VAR(type) PNG_DATA_EXPORT
1398 #    endif
1399 #  endif
1400 #endif
1401
1402 #ifndef PNG_EXPORT
1403 #  define PNG_EXPORT(type,symbol) PNG_IMPEXP type PNGAPI symbol
1404 #endif
1405
1406 #ifdef PNG_USE_GLOBAL_ARRAYS
1407 #  ifndef PNG_EXPORT_VAR
1408 #    define PNG_EXPORT_VAR(type) extern PNG_IMPEXP type
1409 #  endif
1410 #endif
1411
1412 /* User may want to use these so they are not in PNG_INTERNAL. Any library
1413  * functions that are passed far data must be model independent.
1414  */
1415
1416 #ifndef PNG_ABORT
1417 #  define PNG_ABORT() abort()
1418 #endif
1419
1420 #ifdef PNG_SETJMP_SUPPORTED
1421 #  define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf)
1422 #else
1423 #  define png_jmpbuf(png_ptr) \
1424    (LIBPNG_WAS_COMPILED_WITH__PNG_SETJMP_NOT_SUPPORTED)
1425 #endif
1426
1427 #if defined(USE_FAR_KEYWORD)  /* memory model independent fns */
1428 /* use this to make far-to-near assignments */
1429 #  define CHECK   1
1430 #  define NOCHECK 0
1431 #  define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK))
1432 #  define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK))
1433 #  define png_snprintf _fsnprintf   /* Added to v 1.2.19 */
1434 #  define png_strcpy  _fstrcpy
1435 #  define png_strncpy _fstrncpy   /* Added to v 1.2.6 */
1436 #  define png_strlen  _fstrlen
1437 #  define png_memcmp  _fmemcmp    /* SJT: added */
1438 #  define png_memcpy  _fmemcpy
1439 #  define png_memset  _fmemset
1440 #else /* use the usual functions */
1441 #  define CVT_PTR(ptr)         (ptr)
1442 #  define CVT_PTR_NOCHECK(ptr) (ptr)
1443 #  ifndef PNG_NO_SNPRINTF
1444 #    ifdef _MSC_VER
1445 #      define png_snprintf _snprintf   /* Added to v 1.2.19 */
1446 #      define png_snprintf2 _snprintf
1447 #      define png_snprintf6 _snprintf
1448 #    else
1449 #      define png_snprintf snprintf   /* Added to v 1.2.19 */
1450 #      define png_snprintf2 snprintf
1451 #      define png_snprintf6 snprintf
1452 #    endif
1453 #  else
1454      /* You don't have or don't want to use snprintf().  Caution: Using
1455       * sprintf instead of snprintf exposes your application to accidental
1456       * or malevolent buffer overflows.  If you don't have snprintf()
1457       * as a general rule you should provide one (you can get one from
1458       * Portable OpenSSH). */
1459 #    define png_snprintf(s1,n,fmt,x1) sprintf(s1,fmt,x1)
1460 #    define png_snprintf2(s1,n,fmt,x1,x2) sprintf(s1,fmt,x1,x2)
1461 #    define png_snprintf6(s1,n,fmt,x1,x2,x3,x4,x5,x6) \
1462         sprintf(s1,fmt,x1,x2,x3,x4,x5,x6)
1463 #  endif
1464 #  define png_strcpy  strcpy
1465 #  define png_strncpy strncpy     /* Added to v 1.2.6 */
1466 #  define png_strlen  strlen
1467 #  define png_memcmp  memcmp      /* SJT: added */
1468 #  define png_memcpy  memcpy
1469 #  define png_memset  memset
1470 #endif
1471 /* End of memory model independent support */
1472
1473 /* Just a little check that someone hasn't tried to define something
1474  * contradictory.
1475  */
1476 #if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K)
1477 #  undef PNG_ZBUF_SIZE
1478 #  define PNG_ZBUF_SIZE 65536L
1479 #endif
1480
1481 /* Added at libpng-1.2.8 */
1482 #endif /* PNG_VERSION_INFO_ONLY */
1483
1484 #endif /* PNGCONF_H */