src/libpng/pngconf.h

   1
   2 /* pngconf.h - machine configurable file for libpng
   3  *
   4  * libpng version 1.2.37 - June 4, 2009
   5  * For conditions of distribution and use, see copyright notice in png.h
   6  * Copyright (c) 1998-2009 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 /* Added at libpng-1.2.19, removed at libpng-1.2.20 because it caused trouble
  79    Restored at libpng-1.2.21 */
  80 #if !defined(PNG_NO_WARN_UNINITIALIZED_ROW) && \
  81     !defined(PNG_WARN_UNINITIALIZED_ROW)
  82 #  define PNG_WARN_UNINITIALIZED_ROW 1
  83 #endif
  84 /* End of material added at libpng-1.2.19/1.2.21 */
  85
  86 /* This is the size of the compression buffer, and thus the size of
  87  * an IDAT chunk.  Make this whatever size you feel is best for your
  88  * machine.  One of these will be allocated per png_struct.  When this
  89  * is full, it writes the data to the disk, and does some other
  90  * calculations.  Making this an extremely small size will slow
  91  * the library down, but you may want to experiment to determine
  92  * where it becomes significant, if you are concerned with memory
  93  * usage.  Note that zlib allocates at least 32Kb also.  For readers,
  94  * this describes the size of the buffer available to read the data in.
  95  * Unless this gets smaller than the size of a row (compressed),
  96  * it should not make much difference how big this is.
  97  */
  98
  99 #ifndef PNG_ZBUF_SIZE
 100 #  define PNG_ZBUF_SIZE 8192
 101 #endif
 102
 103 /* Enable if you want a write-only libpng */
 104
 105 #ifndef PNG_NO_READ_SUPPORTED
 106 #  define PNG_READ_SUPPORTED
 107 #endif
 108
 109 /* Enable if you want a read-only libpng */
 110
 111 #ifndef PNG_NO_WRITE_SUPPORTED
 112 #  define PNG_WRITE_SUPPORTED
 113 #endif
 114
 115 /* Enabled by default in 1.2.0.  You can disable this if you don't need to
 116    support PNGs that are embedded in MNG datastreams */
 117 #if !defined(PNG_1_0_X) && !defined(PNG_NO_MNG_FEATURES)
 118 #  ifndef PNG_MNG_FEATURES_SUPPORTED
 119 #    define PNG_MNG_FEATURES_SUPPORTED
 120 #  endif
 121 #endif
 122
 123 #ifndef PNG_NO_FLOATING_POINT_SUPPORTED
 124 #  ifndef PNG_FLOATING_POINT_SUPPORTED
 125 #    define PNG_FLOATING_POINT_SUPPORTED
 126 #  endif
 127 #endif
 128
 129 /* If you are running on a machine where you cannot allocate more
 130  * than 64K of memory at once, uncomment this.  While libpng will not
 131  * normally need that much memory in a chunk (unless you load up a very
 132  * large file), zlib needs to know how big of a chunk it can use, and
 133  * libpng thus makes sure to check any memory allocation to verify it
 134  * will fit into memory.
 135 #define PNG_MAX_MALLOC_64K
 136  */
 137 #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
 138 #  define PNG_MAX_MALLOC_64K
 139 #endif
 140
 141 /* Special munging to support doing things the 'cygwin' way:
 142  * 'Normal' png-on-win32 defines/defaults:
 143  *   PNG_BUILD_DLL -- building dll
 144  *   PNG_USE_DLL   -- building an application, linking to dll
 145  *   (no define)   -- building static library, or building an
 146  *                    application and linking to the static lib
 147  * 'Cygwin' defines/defaults:
 148  *   PNG_BUILD_DLL -- (ignored) building the dll
 149  *   (no define)   -- (ignored) building an application, linking to the dll
 150  *   PNG_STATIC    -- (ignored) building the static lib, or building an
 151  *                    application that links to the static lib.
 152  *   ALL_STATIC    -- (ignored) building various static libs, or building an
 153  *                    application that links to the static libs.
 154  * Thus,
 155  * a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and
 156  * this bit of #ifdefs will define the 'correct' config variables based on
 157  * that. If a cygwin user *wants* to define 'PNG_USE_DLL' that's okay, but
 158  * unnecessary.
 159  *
 160  * Also, the precedence order is:
 161  *   ALL_STATIC (since we can't #undef something outside our namespace)
 162  *   PNG_BUILD_DLL
 163  *   PNG_STATIC
 164  *   (nothing) == PNG_USE_DLL
 165  *
 166  * CYGWIN (2002-01-20): The preceding is now obsolete. With the advent
 167  *   of auto-import in binutils, we no longer need to worry about
 168  *   __declspec(dllexport) / __declspec(dllimport) and friends.  Therefore,
 169  *   we don't need to worry about PNG_STATIC or ALL_STATIC when it comes
 170  *   to __declspec() stuff.  However, we DO need to worry about
 171  *   PNG_BUILD_DLL and PNG_STATIC because those change some defaults
 172  *   such as CONSOLE_IO and whether GLOBAL_ARRAYS are allowed.
 173  */
 174 #if defined(__CYGWIN__)
 175 #  if defined(ALL_STATIC)
 176 #    if defined(PNG_BUILD_DLL)
 177 #      undef PNG_BUILD_DLL
 178 #    endif
 179 #    if defined(PNG_USE_DLL)
 180 #      undef PNG_USE_DLL
 181 #    endif
 182 #    if defined(PNG_DLL)
 183 #      undef PNG_DLL
 184 #    endif
 185 #    if !defined(PNG_STATIC)
 186 #      define PNG_STATIC
 187 #    endif
 188 #  else
 189 #    if defined (PNG_BUILD_DLL)
 190 #      if defined(PNG_STATIC)
 191 #        undef PNG_STATIC
 192 #      endif
 193 #      if defined(PNG_USE_DLL)
 194 #        undef PNG_USE_DLL
 195 #      endif
 196 #      if !defined(PNG_DLL)
 197 #        define PNG_DLL
 198 #      endif
 199 #    else
 200 #      if defined(PNG_STATIC)
 201 #        if defined(PNG_USE_DLL)
 202 #          undef PNG_USE_DLL
 203 #        endif
 204 #        if defined(PNG_DLL)
 205 #          undef PNG_DLL
 206 #        endif
 207 #      else
 208 #        if !defined(PNG_USE_DLL)
 209 #          define PNG_USE_DLL
 210 #        endif
 211 #        if !defined(PNG_DLL)
 212 #          define PNG_DLL
 213 #        endif
 214 #      endif
 215 #    endif
 216 #  endif
 217 #endif
 218
 219 /* This protects us against compilers that run on a windowing system
 220  * and thus don't have or would rather us not use the stdio types:
 221  * stdin, stdout, and stderr.  The only one currently used is stderr
 222  * in png_error() and png_warning().  #defining PNG_NO_CONSOLE_IO will
 223  * prevent these from being compiled and used. #defining PNG_NO_STDIO
 224  * will also prevent these, plus will prevent the entire set of stdio
 225  * macros and functions (FILE *, printf, etc.) from being compiled and used,
 226  * unless (PNG_DEBUG > 0) has been #defined.
 227  *
 228  * #define PNG_NO_CONSOLE_IO
 229  * #define PNG_NO_STDIO
 230  */
 231
 232 #if defined(_WIN32_WCE)
 233 #  include <windows.h>
 234    /* Console I/O functions are not supported on WindowsCE */
 235 #  define PNG_NO_CONSOLE_IO
 236    /* abort() may not be supported on some/all Windows CE platforms */
 237 #  define PNG_ABORT() exit(-1)
 238 #  ifdef PNG_DEBUG
 239 #    undef PNG_DEBUG
 240 #  endif
 241 #endif
 242
 243 #ifdef PNG_BUILD_DLL
 244 #  ifndef PNG_CONSOLE_IO_SUPPORTED
 245 #    ifndef PNG_NO_CONSOLE_IO
 246 #      define PNG_NO_CONSOLE_IO
 247 #    endif
 248 #  endif
 249 #endif
 250
 251 #  ifdef PNG_NO_STDIO
 252 #    ifndef PNG_NO_CONSOLE_IO
 253 #      define PNG_NO_CONSOLE_IO
 254 #    endif
 255 #    ifdef PNG_DEBUG
 256 #      if (PNG_DEBUG > 0)
 257 #        include <stdio.h>
 258 #      endif
 259 #    endif
 260 #  else
 261 #    if !defined(_WIN32_WCE)
 262 /* "stdio.h" functions are not supported on WindowsCE */
 263 #      include <stdio.h>
 264 #    endif
 265 #  endif
 266
 267 /* This macro protects us against machines that don't have function
 268  * prototypes (ie K&R style headers).  If your compiler does not handle
 269  * function prototypes, define this macro and use the included ansi2knr.
 270  * I've always been able to use _NO_PROTO as the indicator, but you may
 271  * need to drag the empty declaration out in front of here, or change the
 272  * ifdef to suit your own needs.
 273  */
 274 #ifndef PNGARG
 275
 276 #ifdef OF /* zlib prototype munger */
 277 #  define PNGARG(arglist) OF(arglist)
 278 #else
 279
 280 #ifdef _NO_PROTO
 281 #  define PNGARG(arglist) ()
 282 #  ifndef PNG_TYPECAST_NULL
 283 #     define PNG_TYPECAST_NULL
 284 #  endif
 285 #else
 286 #  define PNGARG(arglist) arglist
 287 #endif /* _NO_PROTO */
 288
 289
 290 #endif /* OF */
 291
 292 #endif /* PNGARG */
 293
 294 /* Try to determine if we are compiling on a Mac.  Note that testing for
 295  * just __MWERKS__ is not good enough, because the Codewarrior is now used
 296  * on non-Mac platforms.
 297  */
 298 #ifndef MACOS
 299 #  if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
 300       defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC)
 301 #    define MACOS
 302 #  endif
 303 #endif
 304
 305 /* enough people need this for various reasons to include it here */
 306 #if !defined(MACOS) && !defined(RISCOS) && !defined(_WIN32_WCE)
 307 #  include <sys/types.h>
 308 #endif
 309
 310 #if !defined(PNG_SETJMP_NOT_SUPPORTED) && !defined(PNG_NO_SETJMP_SUPPORTED)
 311 #  define PNG_SETJMP_SUPPORTED
 312 #endif
 313
 314 #ifdef PNG_SETJMP_SUPPORTED
 315 /* This is an attempt to force a single setjmp behaviour on Linux.  If
 316  * the X config stuff didn't define _BSD_SOURCE we wouldn't need this.
 317  *
 318  * You can bypass this test if you know that your application uses exactly
 319  * the same setjmp.h that was included when libpng was built.  Only define
 320  * PNG_SKIP_SETJMP_CHECK while building your application, prior to the
 321  * application's '#include "png.h"'. Don't define PNG_SKIP_SETJMP_CHECK
 322  * while building a separate libpng library for general use.
 323  */
 324
 325 #  ifndef PNG_SKIP_SETJMP_CHECK
 326 #    ifdef __linux__
 327 #      ifdef _BSD_SOURCE
 328 #        define PNG_SAVE_BSD_SOURCE
 329 #        undef _BSD_SOURCE
 330 #      endif
 331 #      ifdef _SETJMP_H
 332        /* If you encounter a compiler error here, see the explanation
 333         * near the end of INSTALL.
 334         */
 335            __pngconf.h__ in libpng already includes setjmp.h;
 336            __dont__ include it again.;
 337 #      endif
 338 #    endif /* __linux__ */
 339 #  endif /* PNG_SKIP_SETJMP_CHECK */
 340
 341    /* include setjmp.h for error handling */
 342 #  include <setjmp.h>
 343
 344 #  ifdef __linux__
 345 #    ifdef PNG_SAVE_BSD_SOURCE
 346 #      ifndef _BSD_SOURCE
 347 #        define _BSD_SOURCE
 348 #      endif
 349 #      undef PNG_SAVE_BSD_SOURCE
 350 #    endif
 351 #  endif /* __linux__ */
 352 #endif /* PNG_SETJMP_SUPPORTED */
 353
 354 #ifdef BSD
 355 #  include <strings.h>
 356 #else
 357 #  include <string.h>
 358 #endif
 359
 360 /* Other defines for things like memory and the like can go here.  */
 361 #ifdef PNG_INTERNAL
 362
 363 #include <stdlib.h>
 364
 365 /* The functions exported by PNG_EXTERN are PNG_INTERNAL functions, which
 366  * aren't usually used outside the library (as far as I know), so it is
 367  * debatable if they should be exported at all.  In the future, when it is
 368  * possible to have run-time registry of chunk-handling functions, some of
 369  * these will be made available again.
 370 #define PNG_EXTERN extern
 371  */
 372 #define PNG_EXTERN
 373
 374 /* Other defines specific to compilers can go here.  Try to keep
 375  * them inside an appropriate ifdef/endif pair for portability.
 376  */
 377
 378 #if defined(PNG_FLOATING_POINT_SUPPORTED)
 379 #  if defined(MACOS)
 380      /* We need to check that <math.h> hasn't already been included earlier
 381       * as it seems it doesn't agree with <fp.h>, yet we should really use
 382       * <fp.h> if possible.
 383       */
 384 #    if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__)
 385 #      include <fp.h>
 386 #    endif
 387 #  else
 388 #    include <math.h>
 389 #  endif
 390 #  if defined(_AMIGA) && defined(__SASC) && defined(_M68881)
 391      /* Amiga SAS/C: We must include builtin FPU functions when compiling using
 392       * MATH=68881
 393       */
 394 #    include <m68881.h>
 395 #  endif
 396 #endif
 397
 398 /* Codewarrior on NT has linking problems without this. */
 399 #if (defined(__MWERKS__) && defined(WIN32)) || defined(__STDC__)
 400 #  define PNG_ALWAYS_EXTERN
 401 #endif
 402
 403 /* This provides the non-ANSI (far) memory allocation routines. */
 404 #if defined(__TURBOC__) && defined(__MSDOS__)
 405 #  include <mem.h>
 406 #  include <alloc.h>
 407 #endif
 408
 409 /* I have no idea why is this necessary... */
 410 #if defined(_MSC_VER) && (defined(WIN32) || defined(_Windows) || \
 411     defined(_WINDOWS) || defined(_WIN32) || defined(__WIN32__))
 412 #  include <malloc.h>
 413 #endif
 414
 415 /* This controls how fine the dithering gets.  As this allocates
 416  * a largish chunk of memory (32K), those who are not as concerned
 417  * with dithering quality can decrease some or all of these.
 418  */
 419 #ifndef PNG_DITHER_RED_BITS
 420 #  define PNG_DITHER_RED_BITS 5
 421 #endif
 422 #ifndef PNG_DITHER_GREEN_BITS
 423 #  define PNG_DITHER_GREEN_BITS 5
 424 #endif
 425 #ifndef PNG_DITHER_BLUE_BITS
 426 #  define PNG_DITHER_BLUE_BITS 5
 427 #endif
 428
 429 /* This controls how fine the gamma correction becomes when you
 430  * are only interested in 8 bits anyway.  Increasing this value
 431  * results in more memory being used, and more pow() functions
 432  * being called to fill in the gamma tables.  Don't set this value
 433  * less then 8, and even that may not work (I haven't tested it).
 434  */
 435
 436 #ifndef PNG_MAX_GAMMA_8
 437 #  define PNG_MAX_GAMMA_8 11
 438 #endif
 439
 440 /* This controls how much a difference in gamma we can tolerate before
 441  * we actually start doing gamma conversion.
 442  */
 443 #ifndef PNG_GAMMA_THRESHOLD
 444 #  define PNG_GAMMA_THRESHOLD 0.05
 445 #endif
 446
 447 #endif /* PNG_INTERNAL */
 448
 449 /* The following uses const char * instead of char * for error
 450  * and warning message functions, so some compilers won't complain.
 451  * If you do not want to use const, define PNG_NO_CONST here.
 452  */
 453
 454 #ifndef PNG_NO_CONST
 455 #  define PNG_CONST const
 456 #else
 457 #  define PNG_CONST
 458 #endif
 459
 460 /* The following defines give you the ability to remove code from the
 461  * library that you will not be using.  I wish I could figure out how to
 462  * automate this, but I can't do that without making it seriously hard
 463  * on the users.  So if you are not using an ability, change the #define
 464  * to and #undef, and that part of the library will not be compiled.  If
 465  * your linker can't find a function, you may want to make sure the
 466  * ability is defined here.  Some of these depend upon some others being
 467  * defined.  I haven't figured out all the interactions here, so you may
 468  * have to experiment awhile to get everything to compile.  If you are
 469  * creating or using a shared library, you probably shouldn't touch this,
 470  * as it will affect the size of the structures, and this will cause bad
 471  * things to happen if the library and/or application ever change.
 472  */
 473
 474 /* Any features you will not be using can be undef'ed here */
 475
 476 /* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user
 477  * to turn it off with "*TRANSFORMS_NOT_SUPPORTED" or *PNG_NO_*_TRANSFORMS
 478  * on the compile line, then pick and choose which ones to define without
 479  * having to edit this file. It is safe to use the *TRANSFORMS_NOT_SUPPORTED
 480  * if you only want to have a png-compliant reader/writer but don't need
 481  * any of the extra transformations.  This saves about 80 kbytes in a
 482  * typical installation of the library. (PNG_NO_* form added in version
 483  * 1.0.1c, for consistency)
 484  */
 485
 486 /* The size of the png_text structure changed in libpng-1.0.6 when
 487  * iTXt support was added.  iTXt support was turned off by default through
 488  * libpng-1.2.x, to support old apps that malloc the png_text structure
 489  * instead of calling png_set_text() and letting libpng malloc it.  It
 490  * was turned on by default in libpng-1.3.0.
 491  */
 492
 493 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
 494 #  ifndef PNG_NO_iTXt_SUPPORTED
 495 #    define PNG_NO_iTXt_SUPPORTED
 496 #  endif
 497 #  ifndef PNG_NO_READ_iTXt
 498 #    define PNG_NO_READ_iTXt
 499 #  endif
 500 #  ifndef PNG_NO_WRITE_iTXt
 501 #    define PNG_NO_WRITE_iTXt
 502 #  endif
 503 #endif
 504
 505 #if !defined(PNG_NO_iTXt_SUPPORTED)
 506 #  if !defined(PNG_READ_iTXt_SUPPORTED) && !defined(PNG_NO_READ_iTXt)
 507 #    define PNG_READ_iTXt
 508 #  endif
 509 #  if !defined(PNG_WRITE_iTXt_SUPPORTED) && !defined(PNG_NO_WRITE_iTXt)
 510 #    define PNG_WRITE_iTXt
 511 #  endif
 512 #endif
 513
 514 /* The following support, added after version 1.0.0, can be turned off here en
 515  * masse by defining PNG_LEGACY_SUPPORTED in case you need binary compatibility
 516  * with old applications that require the length of png_struct and png_info
 517  * to remain unchanged.
 518  */
 519
 520 #ifdef PNG_LEGACY_SUPPORTED
 521 #  define PNG_NO_FREE_ME
 522 #  define PNG_NO_READ_UNKNOWN_CHUNKS
 523 #  define PNG_NO_WRITE_UNKNOWN_CHUNKS
 524 #  define PNG_NO_READ_USER_CHUNKS
 525 #  define PNG_NO_READ_iCCP
 526 #  define PNG_NO_WRITE_iCCP
 527 #  define PNG_NO_READ_iTXt
 528 #  define PNG_NO_WRITE_iTXt
 529 #  define PNG_NO_READ_sCAL
 530 #  define PNG_NO_WRITE_sCAL
 531 #  define PNG_NO_READ_sPLT
 532 #  define PNG_NO_WRITE_sPLT
 533 #  define PNG_NO_INFO_IMAGE
 534 #  define PNG_NO_READ_RGB_TO_GRAY
 535 #  define PNG_NO_READ_USER_TRANSFORM
 536 #  define PNG_NO_WRITE_USER_TRANSFORM
 537 #  define PNG_NO_USER_MEM
 538 #  define PNG_NO_READ_EMPTY_PLTE
 539 #  define PNG_NO_MNG_FEATURES
 540 #  define PNG_NO_FIXED_POINT_SUPPORTED
 541 #endif
 542
 543 /* Ignore attempt to turn off both floating and fixed point support */
 544 #if !defined(PNG_FLOATING_POINT_SUPPORTED) || \
 545     !defined(PNG_NO_FIXED_POINT_SUPPORTED)
 546 #  define PNG_FIXED_POINT_SUPPORTED
 547 #endif
 548
 549 #ifndef PNG_NO_FREE_ME
 550 #  define PNG_FREE_ME_SUPPORTED
 551 #endif
 552
 553 #if defined(PNG_READ_SUPPORTED)
 554
 555 #if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \
 556       !defined(PNG_NO_READ_TRANSFORMS)
 557 #  define PNG_READ_TRANSFORMS_SUPPORTED
 558 #endif
 559
 560 #ifdef PNG_READ_TRANSFORMS_SUPPORTED
 561 #  ifndef PNG_NO_READ_EXPAND
 562 #    define PNG_READ_EXPAND_SUPPORTED
 563 #  endif
 564 #  ifndef PNG_NO_READ_SHIFT
 565 #    define PNG_READ_SHIFT_SUPPORTED
 566 #  endif
 567 #  ifndef PNG_NO_READ_PACK
 568 #    define PNG_READ_PACK_SUPPORTED
 569 #  endif
 570 #  ifndef PNG_NO_READ_BGR
 571 #    define PNG_READ_BGR_SUPPORTED
 572 #  endif
 573 #  ifndef PNG_NO_READ_SWAP
 574 #    define PNG_READ_SWAP_SUPPORTED
 575 #  endif
 576 #  ifndef PNG_NO_READ_PACKSWAP
 577 #    define PNG_READ_PACKSWAP_SUPPORTED
 578 #  endif
 579 #  ifndef PNG_NO_READ_INVERT
 580 #    define PNG_READ_INVERT_SUPPORTED
 581 #  endif
 582 #  ifndef PNG_NO_READ_DITHER
 583 #    define PNG_READ_DITHER_SUPPORTED
 584 #  endif
 585 #  ifndef PNG_NO_READ_BACKGROUND
 586 #    define PNG_READ_BACKGROUND_SUPPORTED
 587 #  endif
 588 #  ifndef PNG_NO_READ_16_TO_8
 589 #    define PNG_READ_16_TO_8_SUPPORTED
 590 #  endif
 591 #  ifndef PNG_NO_READ_FILLER
 592 #    define PNG_READ_FILLER_SUPPORTED
 593 #  endif
 594 #  ifndef PNG_NO_READ_GAMMA
 595 #    define PNG_READ_GAMMA_SUPPORTED
 596 #  endif
 597 #  ifndef PNG_NO_READ_GRAY_TO_RGB
 598 #    define PNG_READ_GRAY_TO_RGB_SUPPORTED
 599 #  endif
 600 #  ifndef PNG_NO_READ_SWAP_ALPHA
 601 #    define PNG_READ_SWAP_ALPHA_SUPPORTED
 602 #  endif
 603 #  ifndef PNG_NO_READ_INVERT_ALPHA
 604 #    define PNG_READ_INVERT_ALPHA_SUPPORTED
 605 #  endif
 606 #  ifndef PNG_NO_READ_STRIP_ALPHA
 607 #    define PNG_READ_STRIP_ALPHA_SUPPORTED
 608 #  endif
 609 #  ifndef PNG_NO_READ_USER_TRANSFORM
 610 #    define PNG_READ_USER_TRANSFORM_SUPPORTED
 611 #  endif
 612 #  ifndef PNG_NO_READ_RGB_TO_GRAY
 613 #    define PNG_READ_RGB_TO_GRAY_SUPPORTED
 614 #  endif
 615 #endif /* PNG_READ_TRANSFORMS_SUPPORTED */
 616
 617 #if !defined(PNG_NO_PROGRESSIVE_READ) && \
 618  !defined(PNG_PROGRESSIVE_READ_SUPPORTED) /* if you don't do progressive   */
 619 #  define PNG_PROGRESSIVE_READ_SUPPORTED  /* reading.  This is not talking */
 620 #endif                            /* about interlacing capability!  You'll */
 621            /* still have interlacing unless you change the following line: */
 622
 623 #define PNG_READ_INTERLACING_SUPPORTED /* required in PNG-compliant decoders */
 624
 625 #ifndef PNG_NO_READ_COMPOSITE_NODIV
 626 #  ifndef PNG_NO_READ_COMPOSITED_NODIV  /* libpng-1.0.x misspelling */
 627 #    define PNG_READ_COMPOSITE_NODIV_SUPPORTED  /* well tested on Intel, SGI */
 628 #  endif
 629 #endif
 630
 631 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
 632 /* Deprecated, will be removed from version 2.0.0.
 633    Use PNG_MNG_FEATURES_SUPPORTED instead. */
 634 #ifndef PNG_NO_READ_EMPTY_PLTE
 635 #  define PNG_READ_EMPTY_PLTE_SUPPORTED
 636 #endif
 637 #endif
 638
 639 #endif /* PNG_READ_SUPPORTED */
 640
 641 #if defined(PNG_WRITE_SUPPORTED)
 642
 643 # if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \
 644     !defined(PNG_NO_WRITE_TRANSFORMS)
 645 #  define PNG_WRITE_TRANSFORMS_SUPPORTED
 646 #endif
 647
 648 #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
 649 #  ifndef PNG_NO_WRITE_SHIFT
 650 #    define PNG_WRITE_SHIFT_SUPPORTED
 651 #  endif
 652 #  ifndef PNG_NO_WRITE_PACK
 653 #    define PNG_WRITE_PACK_SUPPORTED
 654 #  endif
 655 #  ifndef PNG_NO_WRITE_BGR
 656 #    define PNG_WRITE_BGR_SUPPORTED
 657 #  endif
 658 #  ifndef PNG_NO_WRITE_SWAP
 659 #    define PNG_WRITE_SWAP_SUPPORTED
 660 #  endif
 661 #  ifndef PNG_NO_WRITE_PACKSWAP
 662 #    define PNG_WRITE_PACKSWAP_SUPPORTED
 663 #  endif
 664 #  ifndef PNG_NO_WRITE_INVERT
 665 #    define PNG_WRITE_INVERT_SUPPORTED
 666 #  endif
 667 #  ifndef PNG_NO_WRITE_FILLER
 668 #    define PNG_WRITE_FILLER_SUPPORTED   /* same as WRITE_STRIP_ALPHA */
 669 #  endif
 670 #  ifndef PNG_NO_WRITE_SWAP_ALPHA
 671 #    define PNG_WRITE_SWAP_ALPHA_SUPPORTED
 672 #  endif
 673 #  ifndef PNG_NO_WRITE_INVERT_ALPHA
 674 #    define PNG_WRITE_INVERT_ALPHA_SUPPORTED
 675 #  endif
 676 #  ifndef PNG_NO_WRITE_USER_TRANSFORM
 677 #    define PNG_WRITE_USER_TRANSFORM_SUPPORTED
 678 #  endif
 679 #endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */
 680
 681 #if !defined(PNG_NO_WRITE_INTERLACING_SUPPORTED) && \
 682     !defined(PNG_WRITE_INTERLACING_SUPPORTED)
 683 #define PNG_WRITE_INTERLACING_SUPPORTED  /* not required for PNG-compliant
 684                                             encoders, but can cause trouble
 685                                             if left undefined */
 686 #endif
 687
 688 #if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \
 689     !defined(PNG_WRITE_WEIGHTED_FILTER) && \
 690      defined(PNG_FLOATING_POINT_SUPPORTED)
 691 #  define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
 692 #endif
 693
 694 #ifndef PNG_NO_WRITE_FLUSH
 695 #  define PNG_WRITE_FLUSH_SUPPORTED
 696 #endif
 697
 698 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
 699 /* Deprecated, see PNG_MNG_FEATURES_SUPPORTED, above */
 700 #ifndef PNG_NO_WRITE_EMPTY_PLTE
 701 #  define PNG_WRITE_EMPTY_PLTE_SUPPORTED
 702 #endif
 703 #endif
 704
 705 #endif /* PNG_WRITE_SUPPORTED */
 706
 707 #ifndef PNG_1_0_X
 708 #  ifndef PNG_NO_ERROR_NUMBERS
 709 #    define PNG_ERROR_NUMBERS_SUPPORTED
 710 #  endif
 711 #endif /* PNG_1_0_X */
 712
 713 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
 714     defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
 715 #  ifndef PNG_NO_USER_TRANSFORM_PTR
 716 #    define PNG_USER_TRANSFORM_PTR_SUPPORTED
 717 #  endif
 718 #endif
 719
 720 #ifndef PNG_NO_STDIO
 721 #  define PNG_TIME_RFC1123_SUPPORTED
 722 #endif
 723
 724 /* This adds extra functions in pngget.c for accessing data from the
 725  * info pointer (added in version 0.99)
 726  * png_get_image_width()
 727  * png_get_image_height()
 728  * png_get_bit_depth()
 729  * png_get_color_type()
 730  * png_get_compression_type()
 731  * png_get_filter_type()
 732  * png_get_interlace_type()
 733  * png_get_pixel_aspect_ratio()
 734  * png_get_pixels_per_meter()
 735  * png_get_x_offset_pixels()
 736  * png_get_y_offset_pixels()
 737  * png_get_x_offset_microns()
 738  * png_get_y_offset_microns()
 739  */
 740 #if !defined(PNG_NO_EASY_ACCESS) && !defined(PNG_EASY_ACCESS_SUPPORTED)
 741 #  define PNG_EASY_ACCESS_SUPPORTED
 742 #endif
 743
 744 /* PNG_ASSEMBLER_CODE was enabled by default in version 1.2.0
 745  * and removed from version 1.2.20.  The following will be removed
 746  * from libpng-1.4.0
 747 */
 748
 749 #if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_OPTIMIZED_CODE)
 750 #  ifndef PNG_OPTIMIZED_CODE_SUPPORTED
 751 #    define PNG_OPTIMIZED_CODE_SUPPORTED
 752 #  endif
 753 #endif
 754
 755 #if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_ASSEMBLER_CODE)
 756 #  ifndef PNG_ASSEMBLER_CODE_SUPPORTED
 757 #    define PNG_ASSEMBLER_CODE_SUPPORTED
 758 #  endif
 759
 760 #  if defined(__GNUC__) && defined(__x86_64__) && (__GNUC__ < 4)
 761      /* work around 64-bit gcc compiler bugs in gcc-3.x */
 762 #    if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
 763 #      define PNG_NO_MMX_CODE
 764 #    endif
 765 #  endif
 766
 767 #  if defined(__APPLE__)
 768 #    if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
 769 #      define PNG_NO_MMX_CODE
 770 #    endif
 771 #  endif
 772
 773 #  if (defined(__MWERKS__) && ((__MWERKS__ < 0x0900) || macintosh))
 774 #    if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
 775 #      define PNG_NO_MMX_CODE
 776 #    endif
 777 #  endif
 778
 779 #  if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
 780 #    define PNG_MMX_CODE_SUPPORTED
 781 #  endif
 782
 783 #endif
 784 /* end of obsolete code to be removed from libpng-1.4.0 */
 785
 786 #if !defined(PNG_1_0_X)
 787 #if !defined(PNG_NO_USER_MEM) && !defined(PNG_USER_MEM_SUPPORTED)
 788 #  define PNG_USER_MEM_SUPPORTED
 789 #endif
 790 #endif /* PNG_1_0_X */
 791
 792 /* Added at libpng-1.2.6 */
 793 #if !defined(PNG_1_0_X)
 794 #ifndef PNG_SET_USER_LIMITS_SUPPORTED
 795 #if !defined(PNG_NO_SET_USER_LIMITS) && !defined(PNG_SET_USER_LIMITS_SUPPORTED)
 796 #  define PNG_SET_USER_LIMITS_SUPPORTED
 797 #endif
 798 #endif
 799 #endif /* PNG_1_0_X */
 800
 801 /* Added at libpng-1.0.16 and 1.2.6.  To accept all valid PNGS no matter
 802  * how large, set these limits to 0x7fffffffL
 803  */
 804 #ifndef PNG_USER_WIDTH_MAX
 805 #  define PNG_USER_WIDTH_MAX 1000000L
 806 #endif
 807 #ifndef PNG_USER_HEIGHT_MAX
 808 #  define PNG_USER_HEIGHT_MAX 1000000L
 809 #endif
 810
 811 /* Added at libpng-1.2.34 and 1.4.0 */
 812 #ifndef PNG_STRING_NEWLINE
 813 #define PNG_STRING_NEWLINE "\n"
 814 #endif
 815
 816 /* These are currently experimental features, define them if you want */
 817
 818 /* very little testing */
 819 /*
 820 #ifdef PNG_READ_SUPPORTED
 821 #  ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
 822 #    define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
 823 #  endif
 824 #endif
 825 */
 826
 827 /* This is only for PowerPC big-endian and 680x0 systems */
 828 /* some testing */
 829 /*
 830 #ifndef PNG_READ_BIG_ENDIAN_SUPPORTED
 831 #  define PNG_READ_BIG_ENDIAN_SUPPORTED
 832 #endif
 833 */
 834
 835 /* Buggy compilers (e.g., gcc 2.7.2.2) need this */
 836 /*
 837 #define PNG_NO_POINTER_INDEXING
 838 */
 839
 840 /* These functions are turned off by default, as they will be phased out. */
 841 /*
 842 #define  PNG_USELESS_TESTS_SUPPORTED
 843 #define  PNG_CORRECT_PALETTE_SUPPORTED
 844 */
 845
 846 /* Any chunks you are not interested in, you can undef here.  The
 847  * ones that allocate memory may be expecially important (hIST,
 848  * tEXt, zTXt, tRNS, pCAL).  Others will just save time and make png_info
 849  * a bit smaller.
 850  */
 851
 852 #if defined(PNG_READ_SUPPORTED) && \
 853     !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
 854     !defined(PNG_NO_READ_ANCILLARY_CHUNKS)
 855 #  define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
 856 #endif
 857
 858 #if defined(PNG_WRITE_SUPPORTED) && \
 859     !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
 860     !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS)
 861 #  define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
 862 #endif
 863
 864 #ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
 865
 866 #ifdef PNG_NO_READ_TEXT
 867 #  define PNG_NO_READ_iTXt
 868 #  define PNG_NO_READ_tEXt
 869 #  define PNG_NO_READ_zTXt
 870 #endif
 871 #ifndef PNG_NO_READ_bKGD
 872 #  define PNG_READ_bKGD_SUPPORTED
 873 #  define PNG_bKGD_SUPPORTED
 874 #endif
 875 #ifndef PNG_NO_READ_cHRM
 876 #  define PNG_READ_cHRM_SUPPORTED
 877 #  define PNG_cHRM_SUPPORTED
 878 #endif
 879 #ifndef PNG_NO_READ_gAMA
 880 #  define PNG_READ_gAMA_SUPPORTED
 881 #  define PNG_gAMA_SUPPORTED
 882 #endif
 883 #ifndef PNG_NO_READ_hIST
 884 #  define PNG_READ_hIST_SUPPORTED
 885 #  define PNG_hIST_SUPPORTED
 886 #endif
 887 #ifndef PNG_NO_READ_iCCP
 888 #  define PNG_READ_iCCP_SUPPORTED
 889 #  define PNG_iCCP_SUPPORTED
 890 #endif
 891 #ifndef PNG_NO_READ_iTXt
 892 #  ifndef PNG_READ_iTXt_SUPPORTED
 893 #    define PNG_READ_iTXt_SUPPORTED
 894 #  endif
 895 #  ifndef PNG_iTXt_SUPPORTED
 896 #    define PNG_iTXt_SUPPORTED
 897 #  endif
 898 #endif
 899 #ifndef PNG_NO_READ_oFFs
 900 #  define PNG_READ_oFFs_SUPPORTED
 901 #  define PNG_oFFs_SUPPORTED
 902 #endif
 903 #ifndef PNG_NO_READ_pCAL
 904 #  define PNG_READ_pCAL_SUPPORTED
 905 #  define PNG_pCAL_SUPPORTED
 906 #endif
 907 #ifndef PNG_NO_READ_sCAL
 908 #  define PNG_READ_sCAL_SUPPORTED
 909 #  define PNG_sCAL_SUPPORTED
 910 #endif
 911 #ifndef PNG_NO_READ_pHYs
 912 #  define PNG_READ_pHYs_SUPPORTED
 913 #  define PNG_pHYs_SUPPORTED
 914 #endif
 915 #ifndef PNG_NO_READ_sBIT
 916 #  define PNG_READ_sBIT_SUPPORTED
 917 #  define PNG_sBIT_SUPPORTED
 918 #endif
 919 #ifndef PNG_NO_READ_sPLT
 920 #  define PNG_READ_sPLT_SUPPORTED
 921 #  define PNG_sPLT_SUPPORTED
 922 #endif
 923 #ifndef PNG_NO_READ_sRGB
 924 #  define PNG_READ_sRGB_SUPPORTED
 925 #  define PNG_sRGB_SUPPORTED
 926 #endif
 927 #ifndef PNG_NO_READ_tEXt
 928 #  define PNG_READ_tEXt_SUPPORTED
 929 #  define PNG_tEXt_SUPPORTED
 930 #endif
 931 #ifndef PNG_NO_READ_tIME
 932 #  define PNG_READ_tIME_SUPPORTED
 933 #  define PNG_tIME_SUPPORTED
 934 #endif
 935 #ifndef PNG_NO_READ_tRNS
 936 #  define PNG_READ_tRNS_SUPPORTED
 937 #  define PNG_tRNS_SUPPORTED
 938 #endif
 939 #ifndef PNG_NO_READ_zTXt
 940 #  define PNG_READ_zTXt_SUPPORTED
 941 #  define PNG_zTXt_SUPPORTED
 942 #endif
 943 #ifndef PNG_NO_READ_UNKNOWN_CHUNKS
 944 #  define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
 945 #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
 946 #    define PNG_UNKNOWN_CHUNKS_SUPPORTED
 947 #  endif
 948 #  ifndef PNG_NO_HANDLE_AS_UNKNOWN
 949 #    define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
 950 #  endif
 951 #endif
 952 #if !defined(PNG_NO_READ_USER_CHUNKS) && \
 953      defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
 954 #  define PNG_READ_USER_CHUNKS_SUPPORTED
 955 #  define PNG_USER_CHUNKS_SUPPORTED
 956 #  ifdef PNG_NO_READ_UNKNOWN_CHUNKS
 957 #    undef PNG_NO_READ_UNKNOWN_CHUNKS
 958 #  endif
 959 #  ifdef PNG_NO_HANDLE_AS_UNKNOWN
 960 #    undef PNG_NO_HANDLE_AS_UNKNOWN
 961 #  endif
 962 #endif
 963 #ifndef PNG_NO_READ_OPT_PLTE
 964 #  define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */
 965 #endif                      /* optional PLTE chunk in RGB and RGBA images */
 966 #if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \
 967     defined(PNG_READ_zTXt_SUPPORTED)
 968 #  define PNG_READ_TEXT_SUPPORTED
 969 #  define PNG_TEXT_SUPPORTED
 970 #endif
 971
 972 #endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */
 973
 974 #ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
 975
 976 #ifdef PNG_NO_WRITE_TEXT
 977 #  define PNG_NO_WRITE_iTXt
 978 #  define PNG_NO_WRITE_tEXt
 979 #  define PNG_NO_WRITE_zTXt
 980 #endif
 981 #ifndef PNG_NO_WRITE_bKGD
 982 #  define PNG_WRITE_bKGD_SUPPORTED
 983 #  ifndef PNG_bKGD_SUPPORTED
 984 #    define PNG_bKGD_SUPPORTED
 985 #  endif
 986 #endif
 987 #ifndef PNG_NO_WRITE_cHRM
 988 #  define PNG_WRITE_cHRM_SUPPORTED
 989 #  ifndef PNG_cHRM_SUPPORTED
 990 #    define PNG_cHRM_SUPPORTED
 991 #  endif
 992 #endif
 993 #ifndef PNG_NO_WRITE_gAMA
 994 #  define PNG_WRITE_gAMA_SUPPORTED
 995 #  ifndef PNG_gAMA_SUPPORTED
 996 #    define PNG_gAMA_SUPPORTED
 997 #  endif
 998 #endif
 999 #ifndef PNG_NO_WRITE_hIST
1000 #  define PNG_WRITE_hIST_SUPPORTED
1001 #  ifndef PNG_hIST_SUPPORTED
1002 #    define PNG_hIST_SUPPORTED
1003 #  endif
1004 #endif
1005 #ifndef PNG_NO_WRITE_iCCP
1006 #  define PNG_WRITE_iCCP_SUPPORTED
1007 #  ifndef PNG_iCCP_SUPPORTED
1008 #    define PNG_iCCP_SUPPORTED
1009 #  endif
1010 #endif
1011 #ifndef PNG_NO_WRITE_iTXt
1012 #  ifndef PNG_WRITE_iTXt_SUPPORTED
1013 #    define PNG_WRITE_iTXt_SUPPORTED
1014 #  endif
1015 #  ifndef PNG_iTXt_SUPPORTED
1016 #    define PNG_iTXt_SUPPORTED
1017 #  endif
1018 #endif
1019 #ifndef PNG_NO_WRITE_oFFs
1020 #  define PNG_WRITE_oFFs_SUPPORTED
1021 #  ifndef PNG_oFFs_SUPPORTED
1022 #    define PNG_oFFs_SUPPORTED
1023 #  endif
1024 #endif
1025 #ifndef PNG_NO_WRITE_pCAL
1026 #  define PNG_WRITE_pCAL_SUPPORTED
1027 #  ifndef PNG_pCAL_SUPPORTED
1028 #    define PNG_pCAL_SUPPORTED
1029 #  endif
1030 #endif
1031 #ifndef PNG_NO_WRITE_sCAL
1032 #  define PNG_WRITE_sCAL_SUPPORTED
1033 #  ifndef PNG_sCAL_SUPPORTED
1034 #    define PNG_sCAL_SUPPORTED
1035 #  endif
1036 #endif
1037 #ifndef PNG_NO_WRITE_pHYs
1038 #  define PNG_WRITE_pHYs_SUPPORTED
1039 #  ifndef PNG_pHYs_SUPPORTED
1040 #    define PNG_pHYs_SUPPORTED
1041 #  endif
1042 #endif
1043 #ifndef PNG_NO_WRITE_sBIT
1044 #  define PNG_WRITE_sBIT_SUPPORTED
1045 #  ifndef PNG_sBIT_SUPPORTED
1046 #    define PNG_sBIT_SUPPORTED
1047 #  endif
1048 #endif
1049 #ifndef PNG_NO_WRITE_sPLT
1050 #  define PNG_WRITE_sPLT_SUPPORTED
1051 #  ifndef PNG_sPLT_SUPPORTED
1052 #    define PNG_sPLT_SUPPORTED
1053 #  endif
1054 #endif
1055 #ifndef PNG_NO_WRITE_sRGB
1056 #  define PNG_WRITE_sRGB_SUPPORTED
1057 #  ifndef PNG_sRGB_SUPPORTED
1058 #    define PNG_sRGB_SUPPORTED
1059 #  endif
1060 #endif
1061 #ifndef PNG_NO_WRITE_tEXt
1062 #  define PNG_WRITE_tEXt_SUPPORTED
1063 #  ifndef PNG_tEXt_SUPPORTED
1064 #    define PNG_tEXt_SUPPORTED
1065 #  endif
1066 #endif
1067 #ifndef PNG_NO_WRITE_tIME
1068 #  define PNG_WRITE_tIME_SUPPORTED
1069 #  ifndef PNG_tIME_SUPPORTED
1070 #    define PNG_tIME_SUPPORTED
1071 #  endif
1072 #endif
1073 #ifndef PNG_NO_WRITE_tRNS
1074 #  define PNG_WRITE_tRNS_SUPPORTED
1075 #  ifndef PNG_tRNS_SUPPORTED
1076 #    define PNG_tRNS_SUPPORTED
1077 #  endif
1078 #endif
1079 #ifndef PNG_NO_WRITE_zTXt
1080 #  define PNG_WRITE_zTXt_SUPPORTED
1081 #  ifndef PNG_zTXt_SUPPORTED
1082 #    define PNG_zTXt_SUPPORTED
1083 #  endif
1084 #endif
1085 #ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS
1086 #  define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1087 #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
1088 #    define PNG_UNKNOWN_CHUNKS_SUPPORTED
1089 #  endif
1090 #  ifndef PNG_NO_HANDLE_AS_UNKNOWN
1091 #     ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1092 #       define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1093 #     endif
1094 #  endif
1095 #endif
1096 #if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
1097     defined(PNG_WRITE_zTXt_SUPPORTED)
1098 #  define PNG_WRITE_TEXT_SUPPORTED
1099 #  ifndef PNG_TEXT_SUPPORTED
1100 #    define PNG_TEXT_SUPPORTED
1101 #  endif
1102 #endif
1103
1104 #endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */
1105
1106 /* Turn this off to disable png_read_png() and
1107  * png_write_png() and leave the row_pointers member
1108  * out of the info structure.
1109  */
1110 #ifndef PNG_NO_INFO_IMAGE
1111 #  define PNG_INFO_IMAGE_SUPPORTED
1112 #endif
1113
1114 /* need the time information for reading tIME chunks */
1115 #if defined(PNG_tIME_SUPPORTED)
1116 #  if !defined(_WIN32_WCE)
1117      /* "time.h" functions are not supported on WindowsCE */
1118 #    include <time.h>
1119 #  endif
1120 #endif
1121
1122 /* Some typedefs to get us started.  These should be safe on most of the
1123  * common platforms.  The typedefs should be at least as large as the
1124  * numbers suggest (a png_uint_32 must be at least 32 bits long), but they
1125  * don't have to be exactly that size.  Some compilers dislike passing
1126  * unsigned shorts as function parameters, so you may be better off using
1127  * unsigned int for png_uint_16.  Likewise, for 64-bit systems, you may
1128  * want to have unsigned int for png_uint_32 instead of unsigned long.
1129  */
1130
1131 typedef unsigned long png_uint_32;
1132 typedef long png_int_32;
1133 typedef unsigned short png_uint_16;
1134 typedef short png_int_16;
1135 typedef unsigned char png_byte;
1136
1137 /* This is usually size_t.  It is typedef'ed just in case you need it to
1138    change (I'm not sure if you will or not, so I thought I'd be safe) */
1139 #ifdef PNG_SIZE_T
1140    typedef PNG_SIZE_T png_size_t;
1141 #  define png_sizeof(x) png_convert_size(sizeof(x))
1142 #else
1143    typedef size_t png_size_t;
1144 #  define png_sizeof(x) sizeof(x)
1145 #endif
1146
1147 /* The following is needed for medium model support.  It cannot be in the
1148  * PNG_INTERNAL section.  Needs modification for other compilers besides
1149  * MSC.  Model independent support declares all arrays and pointers to be
1150  * large using the far keyword.  The zlib version used must also support
1151  * model independent data.  As of version zlib 1.0.4, the necessary changes
1152  * have been made in zlib.  The USE_FAR_KEYWORD define triggers other
1153  * changes that are needed. (Tim Wegner)
1154  */
1155
1156 /* Separate compiler dependencies (problem here is that zlib.h always
1157    defines FAR. (SJT) */
1158 #ifdef __BORLANDC__
1159 #  if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)
1160 #    define LDATA 1
1161 #  else
1162 #    define LDATA 0
1163 #  endif
1164    /* GRR:  why is Cygwin in here?  Cygwin is not Borland C... */
1165 #  if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)
1166 #    define PNG_MAX_MALLOC_64K
1167 #    if (LDATA != 1)
1168 #      ifndef FAR
1169 #        define FAR __far
1170 #      endif
1171 #      define USE_FAR_KEYWORD
1172 #    endif   /* LDATA != 1 */
1173      /* Possibly useful for moving data out of default segment.
1174       * Uncomment it if you want. Could also define FARDATA as
1175       * const if your compiler supports it. (SJT)
1176 #    define FARDATA FAR
1177       */
1178 #  endif  /* __WIN32__, __FLAT__, __CYGWIN__ */
1179 #endif   /* __BORLANDC__ */
1180
1181
1182 /* Suggest testing for specific compiler first before testing for
1183  * FAR.  The Watcom compiler defines both __MEDIUM__ and M_I86MM,
1184  * making reliance oncertain keywords suspect. (SJT)
1185  */
1186
1187 /* MSC Medium model */
1188 #if defined(FAR)
1189 #  if defined(M_I86MM)
1190 #    define USE_FAR_KEYWORD
1191 #    define FARDATA FAR
1192 #    include <dos.h>
1193 #  endif
1194 #endif
1195
1196 /* SJT: default case */
1197 #ifndef FAR
1198 #  define FAR
1199 #endif
1200
1201 /* At this point FAR is always defined */
1202 #ifndef FARDATA
1203 #  define FARDATA
1204 #endif
1205
1206 /* Typedef for floating-point numbers that are converted
1207    to fixed-point with a multiple of 100,000, e.g., int_gamma */
1208 typedef png_int_32 png_fixed_point;
1209
1210 /* Add typedefs for pointers */
1211 typedef void            FAR * png_voidp;
1212 typedef png_byte        FAR * png_bytep;
1213 typedef png_uint_32     FAR * png_uint_32p;
1214 typedef png_int_32      FAR * png_int_32p;
1215 typedef png_uint_16     FAR * png_uint_16p;
1216 typedef png_int_16      FAR * png_int_16p;
1217 typedef PNG_CONST char  FAR * png_const_charp;
1218 typedef char            FAR * png_charp;
1219 typedef png_fixed_point FAR * png_fixed_point_p;
1220
1221 #ifndef PNG_NO_STDIO
1222 #if defined(_WIN32_WCE)
1223 typedef HANDLE                png_FILE_p;
1224 #else
1225 typedef FILE                * png_FILE_p;
1226 #endif
1227 #endif
1228
1229 #ifdef PNG_FLOATING_POINT_SUPPORTED
1230 typedef double          FAR * png_doublep;
1231 #endif
1232
1233 /* Pointers to pointers; i.e. arrays */
1234 typedef png_byte        FAR * FAR * png_bytepp;
1235 typedef png_uint_32     FAR * FAR * png_uint_32pp;
1236 typedef png_int_32      FAR * FAR * png_int_32pp;
1237 typedef png_uint_16     FAR * FAR * png_uint_16pp;
1238 typedef png_int_16      FAR * FAR * png_int_16pp;
1239 typedef PNG_CONST char  FAR * FAR * png_const_charpp;
1240 typedef char            FAR * FAR * png_charpp;
1241 typedef png_fixed_point FAR * FAR * png_fixed_point_pp;
1242 #ifdef PNG_FLOATING_POINT_SUPPORTED
1243 typedef double          FAR * FAR * png_doublepp;
1244 #endif
1245
1246 /* Pointers to pointers to pointers; i.e., pointer to array */
1247 typedef char            FAR * FAR * FAR * png_charppp;
1248
1249 #if defined(PNG_1_0_X) || defined(PNG_1_2_X)
1250 /* SPC -  Is this stuff deprecated? */
1251 /* It'll be removed as of libpng-1.3.0 - GR-P */
1252 /* libpng typedefs for types in zlib. If zlib changes
1253  * or another compression library is used, then change these.
1254  * Eliminates need to change all the source files.
1255  */
1256 typedef charf *         png_zcharp;
1257 typedef charf * FAR *   png_zcharpp;
1258 typedef z_stream FAR *  png_zstreamp;
1259 #endif /* (PNG_1_0_X) || defined(PNG_1_2_X) */
1260
1261 /*
1262  * Define PNG_BUILD_DLL if the module being built is a Windows
1263  * LIBPNG DLL.
1264  *
1265  * Define PNG_USE_DLL if you want to *link* to the Windows LIBPNG DLL.
1266  * It is equivalent to Microsoft predefined macro _DLL that is
1267  * automatically defined when you compile using the share
1268  * version of the CRT (C Run-Time library)
1269  *
1270  * The cygwin mods make this behavior a little different:
1271  * Define PNG_BUILD_DLL if you are building a dll for use with cygwin
1272  * Define PNG_STATIC if you are building a static library for use with cygwin,
1273  *   -or- if you are building an application that you want to link to the
1274  *   static library.
1275  * PNG_USE_DLL is defined by default (no user action needed) unless one of
1276  *   the other flags is defined.
1277  */
1278
1279 #if !defined(PNG_DLL) && (defined(PNG_BUILD_DLL) || defined(PNG_USE_DLL))
1280 #  define PNG_DLL
1281 #endif
1282 /* If CYGWIN, then disallow GLOBAL ARRAYS unless building a static lib.
1283  * When building a static lib, default to no GLOBAL ARRAYS, but allow
1284  * command-line override
1285  */
1286 #if defined(__CYGWIN__)
1287 #  if !defined(PNG_STATIC)
1288 #    if defined(PNG_USE_GLOBAL_ARRAYS)
1289 #      undef PNG_USE_GLOBAL_ARRAYS
1290 #    endif
1291 #    if !defined(PNG_USE_LOCAL_ARRAYS)
1292 #      define PNG_USE_LOCAL_ARRAYS
1293 #    endif
1294 #  else
1295 #    if defined(PNG_USE_LOCAL_ARRAYS) || defined(PNG_NO_GLOBAL_ARRAYS)
1296 #      if defined(PNG_USE_GLOBAL_ARRAYS)
1297 #        undef PNG_USE_GLOBAL_ARRAYS
1298 #      endif
1299 #    endif
1300 #  endif
1301 #  if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1302 #    define PNG_USE_LOCAL_ARRAYS
1303 #  endif
1304 #endif
1305
1306 /* Do not use global arrays (helps with building DLL's)
1307  * They are no longer used in libpng itself, since version 1.0.5c,
1308  * but might be required for some pre-1.0.5c applications.
1309  */
1310 #if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1311 #  if defined(PNG_NO_GLOBAL_ARRAYS) || \
1312       (defined(__GNUC__) && defined(PNG_DLL)) || defined(_MSC_VER)
1313 #    define PNG_USE_LOCAL_ARRAYS
1314 #  else
1315 #    define PNG_USE_GLOBAL_ARRAYS
1316 #  endif
1317 #endif
1318
1319 #if defined(__CYGWIN__)
1320 #  undef PNGAPI
1321 #  define PNGAPI __cdecl
1322 #  undef PNG_IMPEXP
1323 #  define PNG_IMPEXP
1324 #endif
1325
1326 /* If you define PNGAPI, e.g., with compiler option "-DPNGAPI=__stdcall",
1327  * you may get warnings regarding the linkage of png_zalloc and png_zfree.
1328  * Don't ignore those warnings; you must also reset the default calling
1329  * convention in your compiler to match your PNGAPI, and you must build
1330  * zlib and your applications the same way you build libpng.
1331  */
1332
1333 #if defined(__MINGW32__) && !defined(PNG_MODULEDEF)
1334 #  ifndef PNG_NO_MODULEDEF
1335 #    define PNG_NO_MODULEDEF
1336 #  endif
1337 #endif
1338
1339 #if !defined(PNG_IMPEXP) && defined(PNG_BUILD_DLL) && !defined(PNG_NO_MODULEDEF)
1340 #  define PNG_IMPEXP
1341 #endif
1342
1343 #if defined(PNG_DLL) || defined(_DLL) || defined(__DLL__ ) || \
1344     (( defined(_Windows) || defined(_WINDOWS) || \
1345        defined(WIN32) || defined(_WIN32) || defined(__WIN32__) ))
1346
1347 #  ifndef PNGAPI
1348 #     if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
1349 #        define PNGAPI __cdecl
1350 #     else
1351 #        define PNGAPI _cdecl
1352 #     endif
1353 #  endif
1354
1355 #  if !defined(PNG_IMPEXP) && (!defined(PNG_DLL) || \
1356        0 /* WINCOMPILER_WITH_NO_SUPPORT_FOR_DECLIMPEXP */)
1357 #     define PNG_IMPEXP
1358 #  endif
1359
1360 #  if !defined(PNG_IMPEXP)
1361
1362 #     define PNG_EXPORT_TYPE1(type,symbol)  PNG_IMPEXP type PNGAPI symbol
1363 #     define PNG_EXPORT_TYPE2(type,symbol)  type PNG_IMPEXP PNGAPI symbol
1364
1365       /* Borland/Microsoft */
1366 #     if defined(_MSC_VER) || defined(__BORLANDC__)
1367 #        if (_MSC_VER >= 800) || (__BORLANDC__ >= 0x500)
1368 #           define PNG_EXPORT PNG_EXPORT_TYPE1
1369 #        else
1370 #           define PNG_EXPORT PNG_EXPORT_TYPE2
1371 #           if defined(PNG_BUILD_DLL)
1372 #              define PNG_IMPEXP __export
1373 #           else
1374 #              define PNG_IMPEXP /*__import */ /* doesn't exist AFAIK in
1375                                                  VC++ */
1376 #           endif                             /* Exists in Borland C++ for
1377                                                  C++ classes (== huge) */
1378 #        endif
1379 #     endif
1380
1381 #     if !defined(PNG_IMPEXP)
1382 #        if defined(PNG_BUILD_DLL)
1383 #           define PNG_IMPEXP __declspec(dllexport)
1384 #        else
1385 #           define PNG_IMPEXP __declspec(dllimport)
1386 #        endif
1387 #     endif
1388 #  endif  /* PNG_IMPEXP */
1389 #else /* !(DLL || non-cygwin WINDOWS) */
1390 #   if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
1391 #      ifndef PNGAPI
1392 #         define PNGAPI _System
1393 #      endif
1394 #   else
1395 #      if 0 /* ... other platforms, with other meanings */
1396 #      endif
1397 #   endif
1398 #endif
1399
1400 #ifndef PNGAPI
1401 #  define PNGAPI
1402 #endif
1403 #ifndef PNG_IMPEXP
1404 #  define PNG_IMPEXP
1405 #endif
1406
1407 #ifdef PNG_BUILDSYMS
1408 #  ifndef PNG_EXPORT
1409 #    define PNG_EXPORT(type,symbol) PNG_FUNCTION_EXPORT symbol END
1410 #  endif
1411 #  ifdef PNG_USE_GLOBAL_ARRAYS
1412 #    ifndef PNG_EXPORT_VAR
1413 #      define PNG_EXPORT_VAR(type) PNG_DATA_EXPORT
1414 #    endif
1415 #  endif
1416 #endif
1417
1418 #ifndef PNG_EXPORT
1419 #  define PNG_EXPORT(type,symbol) PNG_IMPEXP type PNGAPI symbol
1420 #endif
1421
1422 #ifdef PNG_USE_GLOBAL_ARRAYS
1423 #  ifndef PNG_EXPORT_VAR
1424 #    define PNG_EXPORT_VAR(type) extern PNG_IMPEXP type
1425 #  endif
1426 #endif
1427
1428 /* User may want to use these so they are not in PNG_INTERNAL. Any library
1429  * functions that are passed far data must be model independent.
1430  */
1431
1432 #ifndef PNG_ABORT
1433 #  define PNG_ABORT() abort()
1434 #endif
1435
1436 #ifdef PNG_SETJMP_SUPPORTED
1437 #  define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf)
1438 #else
1439 #  define png_jmpbuf(png_ptr) \
1440    (LIBPNG_WAS_COMPILED_WITH__PNG_SETJMP_NOT_SUPPORTED)
1441 #endif
1442
1443 #if defined(USE_FAR_KEYWORD)  /* memory model independent fns */
1444 /* use this to make far-to-near assignments */
1445 #  define CHECK   1
1446 #  define NOCHECK 0
1447 #  define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK))
1448 #  define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK))
1449 #  define png_snprintf _fsnprintf   /* Added to v 1.2.19 */
1450 #  define png_strlen  _fstrlen
1451 #  define png_memcmp  _fmemcmp    /* SJT: added */
1452 #  define png_memcpy  _fmemcpy
1453 #  define png_memset  _fmemset
1454 #else /* use the usual functions */
1455 #  define CVT_PTR(ptr)         (ptr)
1456 #  define CVT_PTR_NOCHECK(ptr) (ptr)
1457 #  ifndef PNG_NO_SNPRINTF
1458 #    ifdef _MSC_VER
1459 #      define png_snprintf _snprintf   /* Added to v 1.2.19 */
1460 #      define png_snprintf2 _snprintf
1461 #      define png_snprintf6 _snprintf
1462 #    else
1463 #      define png_snprintf snprintf   /* Added to v 1.2.19 */
1464 #      define png_snprintf2 snprintf
1465 #      define png_snprintf6 snprintf
1466 #    endif
1467 #  else
1468      /* You don't have or don't want to use snprintf().  Caution: Using
1469       * sprintf instead of snprintf exposes your application to accidental
1470       * or malevolent buffer overflows.  If you don't have snprintf()
1471       * as a general rule you should provide one (you can get one from
1472       * Portable OpenSSH). */
1473 #    define png_snprintf(s1,n,fmt,x1) sprintf(s1,fmt,x1)
1474 #    define png_snprintf2(s1,n,fmt,x1,x2) sprintf(s1,fmt,x1,x2)
1475 #    define png_snprintf6(s1,n,fmt,x1,x2,x3,x4,x5,x6) \
1476         sprintf(s1,fmt,x1,x2,x3,x4,x5,x6)
1477 #  endif
1478 #  define png_strlen  strlen
1479 #  define png_memcmp  memcmp      /* SJT: added */
1480 #  define png_memcpy  memcpy
1481 #  define png_memset  memset
1482 #endif
1483 /* End of memory model independent support */
1484
1485 /* Just a little check that someone hasn't tried to define something
1486  * contradictory.
1487  */
1488 #if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K)
1489 #  undef PNG_ZBUF_SIZE
1490 #  define PNG_ZBUF_SIZE 65536L
1491 #endif
1492
1493 /* Added at libpng-1.2.8 */
1494 #endif /* PNG_VERSION_INFO_ONLY */
1495
1496 #endif /* PNGCONF_H */