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