com32/include/pngconf.h

   1
   2 /* pngconf.h - machine configurable file for libpng
   3  *
   4  * libpng version 1.2.8 - December 3, 2004
   5  * For conditions of distribution and use, see copyright notice in png.h
   6  * Copyright (c) 1998-2004 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 #include "pngusr.h"
  28 #endif
  29
  30 /*
  31  * Added at libpng-1.2.8
  32  *
  33  * If you create a private DLL you need to define in "pngusr.h" the followings:
  34  * #define PNG_USER_PRIVATEBUILD <Describes by whom and why this version of
  35  *        the DLL was built>
  36  *  e.g. #define PNG_USER_PRIVATEBUILD "Build by MyCompany for xyz reasons."
  37  * #define PNG_USER_DLLFNAME_POSTFIX <two-letter postfix that serve to
  38  *        distinguish your DLL from those of the official release. These
  39  *        correspond to the trailing letters that come after the version
  40  *        number and must match your private DLL name>
  41  *  e.g. // private DLL "libpng13gx.dll"
  42  *       #define PNG_USER_DLLFNAME_POSTFIX "gx"
  43  *
  44  * The following macros are also at your disposal if you want to complete the
  45  * DLL VERSIONINFO structure.
  46  * - PNG_USER_VERSIONINFO_COMMENTS
  47  * - PNG_USER_VERSIONINFO_COMPANYNAME
  48  * - PNG_USER_VERSIONINFO_LEGALTRADEMARKS
  49  */
  50
  51 #ifdef __STDC__
  52 #ifdef SPECIALBUILD
  53 #  pragma message("PNG_LIBPNG_SPECIALBUILD (and deprecated SPECIALBUILD)\
  54  are now LIBPNG reserved macros. Use PNG_USER_PRIVATEBUILD instead.")
  55 #endif
  56
  57 #ifdef PRIVATEBUILD
  58 # pragma message("PRIVATEBUILD is deprecated. Use\
  59  PNG_USER_PRIVATEBUILD instead.")
  60 # define PNG_USER_PRIVATEBUILD PRIVATEBUILD
  61 #endif
  62 #endif /* __STDC__ */
  63
  64 #ifndef PNG_VERSION_INFO_ONLY
  65
  66 /* End of material added to libpng-1.2.8 */
  67
  68 /* This is the size of the compression buffer, and thus the size of
  69  * an IDAT chunk.  Make this whatever size you feel is best for your
  70  * machine.  One of these will be allocated per png_struct.  When this
  71  * is full, it writes the data to the disk, and does some other
  72  * calculations.  Making this an extremely small size will slow
  73  * the library down, but you may want to experiment to determine
  74  * where it becomes significant, if you are concerned with memory
  75  * usage.  Note that zlib allocates at least 32Kb also.  For readers,
  76  * this describes the size of the buffer available to read the data in.
  77  * Unless this gets smaller than the size of a row (compressed),
  78  * it should not make much difference how big this is.
  79  */
  80
  81 #ifndef PNG_ZBUF_SIZE
  82 #  define PNG_ZBUF_SIZE 8192
  83 #endif
  84
  85 /* Enable if you want a write-only libpng */
  86
  87 #ifndef PNG_NO_READ_SUPPORTED
  88 #  define PNG_READ_SUPPORTED
  89 #endif
  90
  91 /* Enable if you want a read-only libpng */
  92
  93 #ifndef PNG_NO_WRITE_SUPPORTED
  94 #  define PNG_WRITE_SUPPORTED
  95 #endif
  96
  97 /* Enabled by default in 1.2.0.  You can disable this if you don't need to
  98    support PNGs that are embedded in MNG datastreams */
  99 #if !defined(PNG_1_0_X) && !defined(PNG_NO_MNG_FEATURES)
 100 #  ifndef PNG_MNG_FEATURES_SUPPORTED
 101 #    define PNG_MNG_FEATURES_SUPPORTED
 102 #  endif
 103 #endif
 104
 105 #ifndef PNG_NO_FLOATING_POINT_SUPPORTED
 106 #  ifndef PNG_FLOATING_POINT_SUPPORTED
 107 #    define PNG_FLOATING_POINT_SUPPORTED
 108 #  endif
 109 #endif
 110
 111 /* If you are running on a machine where you cannot allocate more
 112  * than 64K of memory at once, uncomment this.  While libpng will not
 113  * normally need that much memory in a chunk (unless you load up a very
 114  * large file), zlib needs to know how big of a chunk it can use, and
 115  * libpng thus makes sure to check any memory allocation to verify it
 116  * will fit into memory.
 117 #define PNG_MAX_MALLOC_64K
 118  */
 119 #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
 120 #  define PNG_MAX_MALLOC_64K
 121 #endif
 122
 123 /* Special munging to support doing things the 'cygwin' way:
 124  * 'Normal' png-on-win32 defines/defaults:
 125  *   PNG_BUILD_DLL -- building dll
 126  *   PNG_USE_DLL   -- building an application, linking to dll
 127  *   (no define)   -- building static library, or building an
 128  *                    application and linking to the static lib
 129  * 'Cygwin' defines/defaults:
 130  *   PNG_BUILD_DLL -- (ignored) building the dll
 131  *   (no define)   -- (ignored) building an application, linking to the dll
 132  *   PNG_STATIC    -- (ignored) building the static lib, or building an
 133  *                    application that links to the static lib.
 134  *   ALL_STATIC    -- (ignored) building various static libs, or building an
 135  *                    application that links to the static libs.
 136  * Thus,
 137  * a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and
 138  * this bit of #ifdefs will define the 'correct' config variables based on
 139  * that. If a cygwin user *wants* to define 'PNG_USE_DLL' that's okay, but
 140  * unnecessary.
 141  *
 142  * Also, the precedence order is:
 143  *   ALL_STATIC (since we can't #undef something outside our namespace)
 144  *   PNG_BUILD_DLL
 145  *   PNG_STATIC
 146  *   (nothing) == PNG_USE_DLL
 147  *
 148  * CYGWIN (2002-01-20): The preceding is now obsolete. With the advent
 149  *   of auto-import in binutils, we no longer need to worry about
 150  *   __declspec(dllexport) / __declspec(dllimport) and friends.  Therefore,
 151  *   we don't need to worry about PNG_STATIC or ALL_STATIC when it comes
 152  *   to __declspec() stuff.  However, we DO need to worry about
 153  *   PNG_BUILD_DLL and PNG_STATIC because those change some defaults
 154  *   such as CONSOLE_IO and whether GLOBAL_ARRAYS are allowed.
 155  */
 156 #if defined(__CYGWIN__)
 157 #  if defined(ALL_STATIC)
 158 #    if defined(PNG_BUILD_DLL)
 159 #      undef PNG_BUILD_DLL
 160 #    endif
 161 #    if defined(PNG_USE_DLL)
 162 #      undef PNG_USE_DLL
 163 #    endif
 164 #    if defined(PNG_DLL)
 165 #      undef PNG_DLL
 166 #    endif
 167 #    if !defined(PNG_STATIC)
 168 #      define PNG_STATIC
 169 #    endif
 170 #  else
 171 #    if defined (PNG_BUILD_DLL)
 172 #      if defined(PNG_STATIC)
 173 #        undef PNG_STATIC
 174 #      endif
 175 #      if defined(PNG_USE_DLL)
 176 #        undef PNG_USE_DLL
 177 #      endif
 178 #      if !defined(PNG_DLL)
 179 #        define PNG_DLL
 180 #      endif
 181 #    else
 182 #      if defined(PNG_STATIC)
 183 #        if defined(PNG_USE_DLL)
 184 #          undef PNG_USE_DLL
 185 #        endif
 186 #        if defined(PNG_DLL)
 187 #          undef PNG_DLL
 188 #        endif
 189 #      else
 190 #        if !defined(PNG_USE_DLL)
 191 #          define PNG_USE_DLL
 192 #        endif
 193 #        if !defined(PNG_DLL)
 194 #          define PNG_DLL
 195 #        endif
 196 #      endif
 197 #    endif
 198 #  endif
 199 #endif
 200
 201 /* This protects us against compilers that run on a windowing system
 202  * and thus don't have or would rather us not use the stdio types:
 203  * stdin, stdout, and stderr.  The only one currently used is stderr
 204  * in png_error() and png_warning().  #defining PNG_NO_CONSOLE_IO will
 205  * prevent these from being compiled and used. #defining PNG_NO_STDIO
 206  * will also prevent these, plus will prevent the entire set of stdio
 207  * macros and functions (FILE *, printf, etc.) from being compiled and used,
 208  * unless (PNG_DEBUG > 0) has been #defined.
 209  *
 210  * #define PNG_NO_CONSOLE_IO
 211  * #define PNG_NO_STDIO
 212  */
 213
 214 #if defined(_WIN32_WCE)
 215 #  include <windows.h>
 216    /* Console I/O functions are not supported on WindowsCE */
 217 #  define PNG_NO_CONSOLE_IO
 218 #  ifdef PNG_DEBUG
 219 #    undef PNG_DEBUG
 220 #  endif
 221 #endif
 222
 223 #ifdef PNG_BUILD_DLL
 224 #  ifndef PNG_CONSOLE_IO_SUPPORTED
 225 #    ifndef PNG_NO_CONSOLE_IO
 226 #      define PNG_NO_CONSOLE_IO
 227 #    endif
 228 #  endif
 229 #endif
 230
 231 #  ifdef PNG_NO_STDIO
 232 #    ifndef PNG_NO_CONSOLE_IO
 233 #      define PNG_NO_CONSOLE_IO
 234 #    endif
 235 #    ifdef PNG_DEBUG
 236 #      if (PNG_DEBUG > 0)
 237 #        include <stdio.h>
 238 #      endif
 239 #    endif
 240 #  else
 241 #    if !defined(_WIN32_WCE)
 242 /* "stdio.h" functions are not supported on WindowsCE */
 243 #      include <stdio.h>
 244 #    endif
 245 #  endif
 246
 247 /* This macro protects us against machines that don't have function
 248  * prototypes (ie K&R style headers).  If your compiler does not handle
 249  * function prototypes, define this macro and use the included ansi2knr.
 250  * I've always been able to use _NO_PROTO as the indicator, but you may
 251  * need to drag the empty declaration out in front of here, or change the
 252  * ifdef to suit your own needs.
 253  */
 254 #ifndef PNGARG
 255
 256 #ifdef OF /* zlib prototype munger */
 257 #  define PNGARG(arglist) OF(arglist)
 258 #else
 259
 260 #ifdef _NO_PROTO
 261 #  define PNGARG(arglist) ()
 262 #  ifndef PNG_TYPECAST_NULL
 263 #     define PNG_TYPECAST_NULL
 264 #  endif
 265 #else
 266 #  define PNGARG(arglist) arglist
 267 #endif /* _NO_PROTO */
 268
 269 #endif /* OF */
 270
 271 #endif /* PNGARG */
 272
 273 /* Try to determine if we are compiling on a Mac.  Note that testing for
 274  * just __MWERKS__ is not good enough, because the Codewarrior is now used
 275  * on non-Mac platforms.
 276  */
 277 #ifndef MACOS
 278 #  if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
 279       defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC)
 280 #    define MACOS
 281 #  endif
 282 #endif
 283
 284 /* enough people need this for various reasons to include it here */
 285 #if !defined(MACOS) && !defined(RISCOS) && !defined(_WIN32_WCE)
 286 #  include <sys/types.h>
 287 #endif
 288
 289 #if !defined(PNG_SETJMP_NOT_SUPPORTED) && !defined(PNG_NO_SETJMP_SUPPORTED)
 290 #  define PNG_SETJMP_SUPPORTED
 291 #endif
 292
 293 #ifdef PNG_SETJMP_SUPPORTED
 294 /* This is an attempt to force a single setjmp behaviour on Linux.  If
 295  * the X config stuff didn't define _BSD_SOURCE we wouldn't need this.
 296  */
 297
 298 #  ifdef __linux__
 299 #    ifdef _BSD_SOURCE
 300 #      define PNG_SAVE_BSD_SOURCE
 301 #      undef _BSD_SOURCE
 302 #    endif
 303 #    ifdef _SETJMP_H
 304      /* If you encounter a compiler error here, see the explanation
 305       * near the end of INSTALL.
 306       */
 307          __png.h__ already includes setjmp.h;
 308          __dont__ include it again.;
 309 #    endif
 310 #  endif /* __linux__ */
 311
 312    /* include setjmp.h for error handling */
 313 #  include <setjmp.h>
 314
 315 #  ifdef __linux__
 316 #    ifdef PNG_SAVE_BSD_SOURCE
 317 #      define _BSD_SOURCE
 318 #      undef PNG_SAVE_BSD_SOURCE
 319 #    endif
 320 #  endif /* __linux__ */
 321 #endif /* PNG_SETJMP_SUPPORTED */
 322
 323 #ifdef BSD
 324 #  include <strings.h>
 325 #else
 326 #  include <string.h>
 327 #endif
 328
 329 /* Other defines for things like memory and the like can go here.  */
 330 #ifdef PNG_INTERNAL
 331
 332 #include <stdlib.h>
 333
 334 /* The functions exported by PNG_EXTERN are PNG_INTERNAL functions, which
 335  * aren't usually used outside the library (as far as I know), so it is
 336  * debatable if they should be exported at all.  In the future, when it is
 337  * possible to have run-time registry of chunk-handling functions, some of
 338  * these will be made available again.
 339 #define PNG_EXTERN extern
 340  */
 341 #define PNG_EXTERN
 342
 343 /* Other defines specific to compilers can go here.  Try to keep
 344  * them inside an appropriate ifdef/endif pair for portability.
 345  */
 346
 347 #if defined(PNG_FLOATING_POINT_SUPPORTED)
 348 #  if defined(MACOS)
 349      /* We need to check that <math.h> hasn't already been included earlier
 350       * as it seems it doesn't agree with <fp.h>, yet we should really use
 351       * <fp.h> if possible.
 352       */
 353 #    if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__)
 354 #      include <fp.h>
 355 #    endif
 356 #  else
 357 #    include <math.h>
 358 #  endif
 359 #  if defined(_AMIGA) && defined(__SASC) && defined(_M68881)
 360      /* Amiga SAS/C: We must include builtin FPU functions when compiling using
 361       * MATH=68881
 362       */
 363 #    include <m68881.h>
 364 #  endif
 365 #endif
 366
 367 /* Codewarrior on NT has linking problems without this. */
 368 #if (defined(__MWERKS__) && defined(WIN32)) || defined(__STDC__)
 369 #  define PNG_ALWAYS_EXTERN
 370 #endif
 371
 372 /* This provides the non-ANSI (far) memory allocation routines. */
 373 #if defined(__TURBOC__) && defined(__MSDOS__)
 374 #  include <mem.h>
 375 #  include <alloc.h>
 376 #endif
 377
 378 /* I have no idea why is this necessary... */
 379 #if defined(_MSC_VER) && (defined(WIN32) || defined(_Windows) || \
 380     defined(_WINDOWS) || defined(_WIN32) || defined(__WIN32__))
 381 #  include <malloc.h>
 382 #endif
 383
 384 /* This controls how fine the dithering gets.  As this allocates
 385  * a largish chunk of memory (32K), those who are not as concerned
 386  * with dithering quality can decrease some or all of these.
 387  */
 388 #ifndef PNG_DITHER_RED_BITS
 389 #  define PNG_DITHER_RED_BITS 5
 390 #endif
 391 #ifndef PNG_DITHER_GREEN_BITS
 392 #  define PNG_DITHER_GREEN_BITS 5
 393 #endif
 394 #ifndef PNG_DITHER_BLUE_BITS
 395 #  define PNG_DITHER_BLUE_BITS 5
 396 #endif
 397
 398 /* This controls how fine the gamma correction becomes when you
 399  * are only interested in 8 bits anyway.  Increasing this value
 400  * results in more memory being used, and more pow() functions
 401  * being called to fill in the gamma tables.  Don't set this value
 402  * less then 8, and even that may not work (I haven't tested it).
 403  */
 404
 405 #ifndef PNG_MAX_GAMMA_8
 406 #  define PNG_MAX_GAMMA_8 11
 407 #endif
 408
 409 /* This controls how much a difference in gamma we can tolerate before
 410  * we actually start doing gamma conversion.
 411  */
 412 #ifndef PNG_GAMMA_THRESHOLD
 413 #  define PNG_GAMMA_THRESHOLD 0.05
 414 #endif
 415
 416 #endif /* PNG_INTERNAL */
 417
 418 /* The following uses const char * instead of char * for error
 419  * and warning message functions, so some compilers won't complain.
 420  * If you do not want to use const, define PNG_NO_CONST here.
 421  */
 422
 423 #ifndef PNG_NO_CONST
 424 #  define PNG_CONST const
 425 #else
 426 #  define PNG_CONST
 427 #endif
 428
 429 /* The following defines give you the ability to remove code from the
 430  * library that you will not be using.  I wish I could figure out how to
 431  * automate this, but I can't do that without making it seriously hard
 432  * on the users.  So if you are not using an ability, change the #define
 433  * to and #undef, and that part of the library will not be compiled.  If
 434  * your linker can't find a function, you may want to make sure the
 435  * ability is defined here.  Some of these depend upon some others being
 436  * defined.  I haven't figured out all the interactions here, so you may
 437  * have to experiment awhile to get everything to compile.  If you are
 438  * creating or using a shared library, you probably shouldn't touch this,
 439  * as it will affect the size of the structures, and this will cause bad
 440  * things to happen if the library and/or application ever change.
 441  */
 442
 443 /* Any features you will not be using can be undef'ed here */
 444
 445 /* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user
 446  * to turn it off with "*TRANSFORMS_NOT_SUPPORTED" or *PNG_NO_*_TRANSFORMS
 447  * on the compile line, then pick and choose which ones to define without
 448  * having to edit this file. It is safe to use the *TRANSFORMS_NOT_SUPPORTED
 449  * if you only want to have a png-compliant reader/writer but don't need
 450  * any of the extra transformations.  This saves about 80 kbytes in a
 451  * typical installation of the library. (PNG_NO_* form added in version
 452  * 1.0.1c, for consistency)
 453  */
 454
 455 /* The size of the png_text structure changed in libpng-1.0.6 when
 456  * iTXt is supported.  It is turned off by default, to support old apps
 457  * that malloc the png_text structure instead of calling png_set_text()
 458  * and letting libpng malloc it.  It will be turned on by default in
 459  * libpng-1.3.0.
 460  */
 461
 462 #ifndef PNG_iTXt_SUPPORTED
 463 #  if !defined(PNG_READ_iTXt_SUPPORTED) && !defined(PNG_NO_READ_iTXt)
 464 #    define PNG_NO_READ_iTXt
 465 #  endif
 466 #  if !defined(PNG_WRITE_iTXt_SUPPORTED) && !defined(PNG_NO_WRITE_iTXt)
 467 #    define PNG_NO_WRITE_iTXt
 468 #  endif
 469 #endif
 470
 471 /* The following support, added after version 1.0.0, can be turned off here en
 472  * masse by defining PNG_LEGACY_SUPPORTED in case you need binary compatibility
 473  * with old applications that require the length of png_struct and png_info
 474  * to remain unchanged.
 475  */
 476
 477 #ifdef PNG_LEGACY_SUPPORTED
 478 #  define PNG_NO_FREE_ME
 479 #  define PNG_NO_READ_UNKNOWN_CHUNKS
 480 #  define PNG_NO_WRITE_UNKNOWN_CHUNKS
 481 #  define PNG_NO_READ_USER_CHUNKS
 482 #  define PNG_NO_READ_iCCP
 483 #  define PNG_NO_WRITE_iCCP
 484 #  define PNG_NO_READ_iTXt
 485 #  define PNG_NO_WRITE_iTXt
 486 #  define PNG_NO_READ_sCAL
 487 #  define PNG_NO_WRITE_sCAL
 488 #  define PNG_NO_READ_sPLT
 489 #  define PNG_NO_WRITE_sPLT
 490 #  define PNG_NO_INFO_IMAGE
 491 #  define PNG_NO_READ_RGB_TO_GRAY
 492 #  define PNG_NO_READ_USER_TRANSFORM
 493 #  define PNG_NO_WRITE_USER_TRANSFORM
 494 #  define PNG_NO_USER_MEM
 495 #  define PNG_NO_READ_EMPTY_PLTE
 496 #  define PNG_NO_MNG_FEATURES
 497 #  define PNG_NO_FIXED_POINT_SUPPORTED
 498 #endif
 499
 500 /* Ignore attempt to turn off both floating and fixed point support */
 501 #if !defined(PNG_FLOATING_POINT_SUPPORTED) || \
 502     !defined(PNG_NO_FIXED_POINT_SUPPORTED)
 503 #  define PNG_FIXED_POINT_SUPPORTED
 504 #endif
 505
 506 #ifndef PNG_NO_FREE_ME
 507 #  define PNG_FREE_ME_SUPPORTED
 508 #endif
 509
 510 #if defined(PNG_READ_SUPPORTED)
 511
 512 #if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \
 513       !defined(PNG_NO_READ_TRANSFORMS)
 514 #  define PNG_READ_TRANSFORMS_SUPPORTED
 515 #endif
 516
 517 #ifdef PNG_READ_TRANSFORMS_SUPPORTED
 518 #  ifndef PNG_NO_READ_EXPAND
 519 #    define PNG_READ_EXPAND_SUPPORTED
 520 #  endif
 521 #  ifndef PNG_NO_READ_SHIFT
 522 #    define PNG_READ_SHIFT_SUPPORTED
 523 #  endif
 524 #  ifndef PNG_NO_READ_PACK
 525 #    define PNG_READ_PACK_SUPPORTED
 526 #  endif
 527 #  ifndef PNG_NO_READ_BGR
 528 #    define PNG_READ_BGR_SUPPORTED
 529 #  endif
 530 #  ifndef PNG_NO_READ_SWAP
 531 #    define PNG_READ_SWAP_SUPPORTED
 532 #  endif
 533 #  ifndef PNG_NO_READ_PACKSWAP
 534 #    define PNG_READ_PACKSWAP_SUPPORTED
 535 #  endif
 536 #  ifndef PNG_NO_READ_INVERT
 537 #    define PNG_READ_INVERT_SUPPORTED
 538 #  endif
 539 #  ifndef PNG_NO_READ_DITHER
 540 #    define PNG_READ_DITHER_SUPPORTED
 541 #  endif
 542 #  ifndef PNG_NO_READ_BACKGROUND
 543 #    define PNG_READ_BACKGROUND_SUPPORTED
 544 #  endif
 545 #  ifndef PNG_NO_READ_16_TO_8
 546 #    define PNG_READ_16_TO_8_SUPPORTED
 547 #  endif
 548 #  ifndef PNG_NO_READ_FILLER
 549 #    define PNG_READ_FILLER_SUPPORTED
 550 #  endif
 551 #  ifndef PNG_NO_READ_GAMMA
 552 #    define PNG_READ_GAMMA_SUPPORTED
 553 #  endif
 554 #  ifndef PNG_NO_READ_GRAY_TO_RGB
 555 #    define PNG_READ_GRAY_TO_RGB_SUPPORTED
 556 #  endif
 557 #  ifndef PNG_NO_READ_SWAP_ALPHA
 558 #    define PNG_READ_SWAP_ALPHA_SUPPORTED
 559 #  endif
 560 #  ifndef PNG_NO_READ_INVERT_ALPHA
 561 #    define PNG_READ_INVERT_ALPHA_SUPPORTED
 562 #  endif
 563 #  ifndef PNG_NO_READ_STRIP_ALPHA
 564 #    define PNG_READ_STRIP_ALPHA_SUPPORTED
 565 #  endif
 566 #  ifndef PNG_NO_READ_USER_TRANSFORM
 567 #    define PNG_READ_USER_TRANSFORM_SUPPORTED
 568 #  endif
 569 #  ifndef PNG_NO_READ_RGB_TO_GRAY
 570 #    define PNG_READ_RGB_TO_GRAY_SUPPORTED
 571 #  endif
 572 #endif /* PNG_READ_TRANSFORMS_SUPPORTED */
 573
 574 #if !defined(PNG_NO_PROGRESSIVE_READ) && \
 575  !defined(PNG_PROGRESSIVE_READ_NOT_SUPPORTED)  /* if you don't do progressive */
 576 #  define PNG_PROGRESSIVE_READ_SUPPORTED     /* reading.  This is not talking */
 577 #endif                               /* about interlacing capability!  You'll */
 578               /* still have interlacing unless you change the following line: */
 579
 580 #define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */
 581
 582 #ifndef PNG_NO_READ_COMPOSITE_NODIV
 583 #  ifndef PNG_NO_READ_COMPOSITED_NODIV  /* libpng-1.0.x misspelling */
 584 #    define PNG_READ_COMPOSITE_NODIV_SUPPORTED   /* well tested on Intel, SGI */
 585 #  endif
 586 #endif
 587
 588 /* Deprecated, will be removed from version 2.0.0.
 589    Use PNG_MNG_FEATURES_SUPPORTED instead. */
 590 #ifndef PNG_NO_READ_EMPTY_PLTE
 591 #  define PNG_READ_EMPTY_PLTE_SUPPORTED
 592 #endif
 593
 594 #endif /* PNG_READ_SUPPORTED */
 595
 596 #if defined(PNG_WRITE_SUPPORTED)
 597
 598 # if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \
 599     !defined(PNG_NO_WRITE_TRANSFORMS)
 600 #  define PNG_WRITE_TRANSFORMS_SUPPORTED
 601 #endif
 602
 603 #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
 604 #  ifndef PNG_NO_WRITE_SHIFT
 605 #    define PNG_WRITE_SHIFT_SUPPORTED
 606 #  endif
 607 #  ifndef PNG_NO_WRITE_PACK
 608 #    define PNG_WRITE_PACK_SUPPORTED
 609 #  endif
 610 #  ifndef PNG_NO_WRITE_BGR
 611 #    define PNG_WRITE_BGR_SUPPORTED
 612 #  endif
 613 #  ifndef PNG_NO_WRITE_SWAP
 614 #    define PNG_WRITE_SWAP_SUPPORTED
 615 #  endif
 616 #  ifndef PNG_NO_WRITE_PACKSWAP
 617 #    define PNG_WRITE_PACKSWAP_SUPPORTED
 618 #  endif
 619 #  ifndef PNG_NO_WRITE_INVERT
 620 #    define PNG_WRITE_INVERT_SUPPORTED
 621 #  endif
 622 #  ifndef PNG_NO_WRITE_FILLER
 623 #    define PNG_WRITE_FILLER_SUPPORTED   /* same as WRITE_STRIP_ALPHA */
 624 #  endif
 625 #  ifndef PNG_NO_WRITE_SWAP_ALPHA
 626 #    define PNG_WRITE_SWAP_ALPHA_SUPPORTED
 627 #  endif
 628 #  ifndef PNG_NO_WRITE_INVERT_ALPHA
 629 #    define PNG_WRITE_INVERT_ALPHA_SUPPORTED
 630 #  endif
 631 #  ifndef PNG_NO_WRITE_USER_TRANSFORM
 632 #    define PNG_WRITE_USER_TRANSFORM_SUPPORTED
 633 #  endif
 634 #endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */
 635
 636 #define PNG_WRITE_INTERLACING_SUPPORTED  /* not required for PNG-compliant
 637                                             encoders, but can cause trouble
 638                                             if left undefined */
 639
 640 #if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \
 641      defined(PNG_FLOATING_POINT_SUPPORTED)
 642 #  define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
 643 #endif
 644
 645 #ifndef PNG_NO_WRITE_FLUSH
 646 #  define PNG_WRITE_FLUSH_SUPPORTED
 647 #endif
 648
 649 /* Deprecated, see PNG_MNG_FEATURES_SUPPORTED, above */
 650 #ifndef PNG_NO_WRITE_EMPTY_PLTE
 651 #  define PNG_WRITE_EMPTY_PLTE_SUPPORTED
 652 #endif
 653
 654 #endif /* PNG_WRITE_SUPPORTED */
 655
 656 #ifndef PNG_1_0_X
 657 #  ifndef PNG_NO_ERROR_NUMBERS
 658 #    define PNG_ERROR_NUMBERS_SUPPORTED
 659 #  endif
 660 #endif /* PNG_1_0_X */
 661
 662 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
 663     defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
 664 #  ifndef PNG_NO_USER_TRANSFORM_PTR
 665 #    define PNG_USER_TRANSFORM_PTR_SUPPORTED
 666 #  endif
 667 #endif
 668
 669 #ifndef PNG_NO_STDIO
 670 #  define PNG_TIME_RFC1123_SUPPORTED
 671 #endif
 672
 673 /* This adds extra functions in pngget.c for accessing data from the
 674  * info pointer (added in version 0.99)
 675  * png_get_image_width()
 676  * png_get_image_height()
 677  * png_get_bit_depth()
 678  * png_get_color_type()
 679  * png_get_compression_type()
 680  * png_get_filter_type()
 681  * png_get_interlace_type()
 682  * png_get_pixel_aspect_ratio()
 683  * png_get_pixels_per_meter()
 684  * png_get_x_offset_pixels()
 685  * png_get_y_offset_pixels()
 686  * png_get_x_offset_microns()
 687  * png_get_y_offset_microns()
 688  */
 689 #if !defined(PNG_NO_EASY_ACCESS) && !defined(PNG_EASY_ACCESS_SUPPORTED)
 690 #  define PNG_EASY_ACCESS_SUPPORTED
 691 #endif
 692
 693 /* PNG_ASSEMBLER_CODE was enabled by default in version 1.2.0
 694    even when PNG_USE_PNGVCRD or PNG_USE_PNGGCCRD is not defined */
 695 #if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_ASSEMBLER_CODE)
 696 #  ifndef PNG_ASSEMBLER_CODE_SUPPORTED
 697 #    define PNG_ASSEMBLER_CODE_SUPPORTED
 698 #  endif
 699 #  if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
 700 #    define PNG_MMX_CODE_SUPPORTED
 701 #  endif
 702 #endif
 703
 704 /* If you are sure that you don't need thread safety and you are compiling
 705    with PNG_USE_PNGCCRD for an MMX application, you can define this for
 706    faster execution.  See pnggccrd.c.
 707 #define PNG_THREAD_UNSAFE_OK
 708 */
 709
 710 #if !defined(PNG_1_0_X)
 711 #if !defined(PNG_NO_USER_MEM) && !defined(PNG_USER_MEM_SUPPORTED)
 712 #  define PNG_USER_MEM_SUPPORTED
 713 #endif
 714 #endif /* PNG_1_0_X */
 715
 716 /* Added at libpng-1.2.6 */
 717 #if !defined(PNG_1_0_X)
 718 #ifndef PNG_SET_USER_LIMITS_SUPPORTED
 719 #if !defined(PNG_NO_SET_USER_LIMITS) && !defined(PNG_SET_USER_LIMITS_SUPPORTED)
 720 #  define PNG_SET_USER_LIMITS_SUPPORTED
 721 #endif
 722 #endif
 723 #endif /* PNG_1_0_X */
 724
 725 /* Added at libpng-1.0.16 and 1.2.6.  To accept all valid PNGS no matter
 726  * how large, set these limits to 0x7fffffffL
 727  */
 728 #ifndef PNG_USER_WIDTH_MAX
 729 #  define PNG_USER_WIDTH_MAX 1000000L
 730 #endif
 731 #ifndef PNG_USER_HEIGHT_MAX
 732 #  define PNG_USER_HEIGHT_MAX 1000000L
 733 #endif
 734
 735 /* These are currently experimental features, define them if you want */
 736
 737 /* very little testing */
 738 /*
 739 #ifdef PNG_READ_SUPPORTED
 740 #  ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
 741 #    define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
 742 #  endif
 743 #endif
 744 */
 745
 746 /* This is only for PowerPC big-endian and 680x0 systems */
 747 /* some testing */
 748 /*
 749 #ifndef PNG_READ_BIG_ENDIAN_SUPPORTED
 750 #  define PNG_READ_BIG_ENDIAN_SUPPORTED
 751 #endif
 752 */
 753
 754 /* Buggy compilers (e.g., gcc 2.7.2.2) need this */
 755 /*
 756 #define PNG_NO_POINTER_INDEXING
 757 */
 758
 759 /* These functions are turned off by default, as they will be phased out. */
 760 /*
 761 #define  PNG_USELESS_TESTS_SUPPORTED
 762 #define  PNG_CORRECT_PALETTE_SUPPORTED
 763 */
 764
 765 /* Any chunks you are not interested in, you can undef here.  The
 766  * ones that allocate memory may be expecially important (hIST,
 767  * tEXt, zTXt, tRNS, pCAL).  Others will just save time and make png_info
 768  * a bit smaller.
 769  */
 770
 771 #if defined(PNG_READ_SUPPORTED) && \
 772     !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
 773     !defined(PNG_NO_READ_ANCILLARY_CHUNKS)
 774 #  define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
 775 #endif
 776
 777 #if defined(PNG_WRITE_SUPPORTED) && \
 778     !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
 779     !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS)
 780 #  define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
 781 #endif
 782
 783 #ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
 784
 785 #ifdef PNG_NO_READ_TEXT
 786 #  define PNG_NO_READ_iTXt
 787 #  define PNG_NO_READ_tEXt
 788 #  define PNG_NO_READ_zTXt
 789 #endif
 790 #ifndef PNG_NO_READ_bKGD
 791 #  define PNG_READ_bKGD_SUPPORTED
 792 #  define PNG_bKGD_SUPPORTED
 793 #endif
 794 #ifndef PNG_NO_READ_cHRM
 795 #  define PNG_READ_cHRM_SUPPORTED
 796 #  define PNG_cHRM_SUPPORTED
 797 #endif
 798 #ifndef PNG_NO_READ_gAMA
 799 #  define PNG_READ_gAMA_SUPPORTED
 800 #  define PNG_gAMA_SUPPORTED
 801 #endif
 802 #ifndef PNG_NO_READ_hIST
 803 #  define PNG_READ_hIST_SUPPORTED
 804 #  define PNG_hIST_SUPPORTED
 805 #endif
 806 #ifndef PNG_NO_READ_iCCP
 807 #  define PNG_READ_iCCP_SUPPORTED
 808 #  define PNG_iCCP_SUPPORTED
 809 #endif
 810 #ifndef PNG_NO_READ_iTXt
 811 #  ifndef PNG_READ_iTXt_SUPPORTED
 812 #    define PNG_READ_iTXt_SUPPORTED
 813 #  endif
 814 #  ifndef PNG_iTXt_SUPPORTED
 815 #    define PNG_iTXt_SUPPORTED
 816 #  endif
 817 #endif
 818 #ifndef PNG_NO_READ_oFFs
 819 #  define PNG_READ_oFFs_SUPPORTED
 820 #  define PNG_oFFs_SUPPORTED
 821 #endif
 822 #ifndef PNG_NO_READ_pCAL
 823 #  define PNG_READ_pCAL_SUPPORTED
 824 #  define PNG_pCAL_SUPPORTED
 825 #endif
 826 #ifndef PNG_NO_READ_sCAL
 827 #  define PNG_READ_sCAL_SUPPORTED
 828 #  define PNG_sCAL_SUPPORTED
 829 #endif
 830 #ifndef PNG_NO_READ_pHYs
 831 #  define PNG_READ_pHYs_SUPPORTED
 832 #  define PNG_pHYs_SUPPORTED
 833 #endif
 834 #ifndef PNG_NO_READ_sBIT
 835 #  define PNG_READ_sBIT_SUPPORTED
 836 #  define PNG_sBIT_SUPPORTED
 837 #endif
 838 #ifndef PNG_NO_READ_sPLT
 839 #  define PNG_READ_sPLT_SUPPORTED
 840 #  define PNG_sPLT_SUPPORTED
 841 #endif
 842 #ifndef PNG_NO_READ_sRGB
 843 #  define PNG_READ_sRGB_SUPPORTED
 844 #  define PNG_sRGB_SUPPORTED
 845 #endif
 846 #ifndef PNG_NO_READ_tEXt
 847 #  define PNG_READ_tEXt_SUPPORTED
 848 #  define PNG_tEXt_SUPPORTED
 849 #endif
 850 #ifndef PNG_NO_READ_tIME
 851 #  define PNG_READ_tIME_SUPPORTED
 852 #  define PNG_tIME_SUPPORTED
 853 #endif
 854 #ifndef PNG_NO_READ_tRNS
 855 #  define PNG_READ_tRNS_SUPPORTED
 856 #  define PNG_tRNS_SUPPORTED
 857 #endif
 858 #ifndef PNG_NO_READ_zTXt
 859 #  define PNG_READ_zTXt_SUPPORTED
 860 #  define PNG_zTXt_SUPPORTED
 861 #endif
 862 #ifndef PNG_NO_READ_UNKNOWN_CHUNKS
 863 #  define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
 864 #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
 865 #    define PNG_UNKNOWN_CHUNKS_SUPPORTED
 866 #  endif
 867 #  ifndef PNG_NO_HANDLE_AS_UNKNOWN
 868 #    define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
 869 #  endif
 870 #endif
 871 #if !defined(PNG_NO_READ_USER_CHUNKS) && \
 872      defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
 873 #  define PNG_READ_USER_CHUNKS_SUPPORTED
 874 #  define PNG_USER_CHUNKS_SUPPORTED
 875 #  ifdef PNG_NO_READ_UNKNOWN_CHUNKS
 876 #    undef PNG_NO_READ_UNKNOWN_CHUNKS
 877 #  endif
 878 #  ifdef PNG_NO_HANDLE_AS_UNKNOWN
 879 #    undef PNG_NO_HANDLE_AS_UNKNOWN
 880 #  endif
 881 #endif
 882 #ifndef PNG_NO_READ_OPT_PLTE
 883 #  define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */
 884 #endif                      /* optional PLTE chunk in RGB and RGBA images */
 885 #if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \
 886     defined(PNG_READ_zTXt_SUPPORTED)
 887 #  define PNG_READ_TEXT_SUPPORTED
 888 #  define PNG_TEXT_SUPPORTED
 889 #endif
 890
 891 #endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */
 892
 893 #ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
 894
 895 #ifdef PNG_NO_WRITE_TEXT
 896 #  define PNG_NO_WRITE_iTXt
 897 #  define PNG_NO_WRITE_tEXt
 898 #  define PNG_NO_WRITE_zTXt
 899 #endif
 900 #ifndef PNG_NO_WRITE_bKGD
 901 #  define PNG_WRITE_bKGD_SUPPORTED
 902 #  ifndef PNG_bKGD_SUPPORTED
 903 #    define PNG_bKGD_SUPPORTED
 904 #  endif
 905 #endif
 906 #ifndef PNG_NO_WRITE_cHRM
 907 #  define PNG_WRITE_cHRM_SUPPORTED
 908 #  ifndef PNG_cHRM_SUPPORTED
 909 #    define PNG_cHRM_SUPPORTED
 910 #  endif
 911 #endif
 912 #ifndef PNG_NO_WRITE_gAMA
 913 #  define PNG_WRITE_gAMA_SUPPORTED
 914 #  ifndef PNG_gAMA_SUPPORTED
 915 #    define PNG_gAMA_SUPPORTED
 916 #  endif
 917 #endif
 918 #ifndef PNG_NO_WRITE_hIST
 919 #  define PNG_WRITE_hIST_SUPPORTED
 920 #  ifndef PNG_hIST_SUPPORTED
 921 #    define PNG_hIST_SUPPORTED
 922 #  endif
 923 #endif
 924 #ifndef PNG_NO_WRITE_iCCP
 925 #  define PNG_WRITE_iCCP_SUPPORTED
 926 #  ifndef PNG_iCCP_SUPPORTED
 927 #    define PNG_iCCP_SUPPORTED
 928 #  endif
 929 #endif
 930 #ifndef PNG_NO_WRITE_iTXt
 931 #  ifndef PNG_WRITE_iTXt_SUPPORTED
 932 #    define PNG_WRITE_iTXt_SUPPORTED
 933 #  endif
 934 #  ifndef PNG_iTXt_SUPPORTED
 935 #    define PNG_iTXt_SUPPORTED
 936 #  endif
 937 #endif
 938 #ifndef PNG_NO_WRITE_oFFs
 939 #  define PNG_WRITE_oFFs_SUPPORTED
 940 #  ifndef PNG_oFFs_SUPPORTED
 941 #    define PNG_oFFs_SUPPORTED
 942 #  endif
 943 #endif
 944 #ifndef PNG_NO_WRITE_pCAL
 945 #  define PNG_WRITE_pCAL_SUPPORTED
 946 #  ifndef PNG_pCAL_SUPPORTED
 947 #    define PNG_pCAL_SUPPORTED
 948 #  endif
 949 #endif
 950 #ifndef PNG_NO_WRITE_sCAL
 951 #  define PNG_WRITE_sCAL_SUPPORTED
 952 #  ifndef PNG_sCAL_SUPPORTED
 953 #    define PNG_sCAL_SUPPORTED
 954 #  endif
 955 #endif
 956 #ifndef PNG_NO_WRITE_pHYs
 957 #  define PNG_WRITE_pHYs_SUPPORTED
 958 #  ifndef PNG_pHYs_SUPPORTED
 959 #    define PNG_pHYs_SUPPORTED
 960 #  endif
 961 #endif
 962 #ifndef PNG_NO_WRITE_sBIT
 963 #  define PNG_WRITE_sBIT_SUPPORTED
 964 #  ifndef PNG_sBIT_SUPPORTED
 965 #    define PNG_sBIT_SUPPORTED
 966 #  endif
 967 #endif
 968 #ifndef PNG_NO_WRITE_sPLT
 969 #  define PNG_WRITE_sPLT_SUPPORTED
 970 #  ifndef PNG_sPLT_SUPPORTED
 971 #    define PNG_sPLT_SUPPORTED
 972 #  endif
 973 #endif
 974 #ifndef PNG_NO_WRITE_sRGB
 975 #  define PNG_WRITE_sRGB_SUPPORTED
 976 #  ifndef PNG_sRGB_SUPPORTED
 977 #    define PNG_sRGB_SUPPORTED
 978 #  endif
 979 #endif
 980 #ifndef PNG_NO_WRITE_tEXt
 981 #  define PNG_WRITE_tEXt_SUPPORTED
 982 #  ifndef PNG_tEXt_SUPPORTED
 983 #    define PNG_tEXt_SUPPORTED
 984 #  endif
 985 #endif
 986 #ifndef PNG_NO_WRITE_tIME
 987 #  define PNG_WRITE_tIME_SUPPORTED
 988 #  ifndef PNG_tIME_SUPPORTED
 989 #    define PNG_tIME_SUPPORTED
 990 #  endif
 991 #endif
 992 #ifndef PNG_NO_WRITE_tRNS
 993 #  define PNG_WRITE_tRNS_SUPPORTED
 994 #  ifndef PNG_tRNS_SUPPORTED
 995 #    define PNG_tRNS_SUPPORTED
 996 #  endif
 997 #endif
 998 #ifndef PNG_NO_WRITE_zTXt
 999 #  define PNG_WRITE_zTXt_SUPPORTED
1000 #  ifndef PNG_zTXt_SUPPORTED
1001 #    define PNG_zTXt_SUPPORTED
1002 #  endif
1003 #endif
1004 #ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS
1005 #  define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1006 #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
1007 #    define PNG_UNKNOWN_CHUNKS_SUPPORTED
1008 #  endif
1009 #  ifndef PNG_NO_HANDLE_AS_UNKNOWN
1010 #     ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1011 #       define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1012 #     endif
1013 #  endif
1014 #endif
1015 #if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
1016     defined(PNG_WRITE_zTXt_SUPPORTED)
1017 #  define PNG_WRITE_TEXT_SUPPORTED
1018 #  ifndef PNG_TEXT_SUPPORTED
1019 #    define PNG_TEXT_SUPPORTED
1020 #  endif
1021 #endif
1022
1023 #endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */
1024
1025 /* Turn this off to disable png_read_png() and
1026  * png_write_png() and leave the row_pointers member
1027  * out of the info structure.
1028  */
1029 #ifndef PNG_NO_INFO_IMAGE
1030 #  define PNG_INFO_IMAGE_SUPPORTED
1031 #endif
1032
1033 /* need the time information for reading tIME chunks */
1034 #if defined(PNG_tIME_SUPPORTED)
1035 #  if !defined(_WIN32_WCE) && !defined(__COM32__)
1036      /* "time.h" functions are not supported on WindowsCE */
1037 #    include <time.h>
1038 #  endif
1039 #endif
1040
1041 /* Some typedefs to get us started.  These should be safe on most of the
1042  * common platforms.  The typedefs should be at least as large as the
1043  * numbers suggest (a png_uint_32 must be at least 32 bits long), but they
1044  * don't have to be exactly that size.  Some compilers dislike passing
1045  * unsigned shorts as function parameters, so you may be better off using
1046  * unsigned int for png_uint_16.  Likewise, for 64-bit systems, you may
1047  * want to have unsigned int for png_uint_32 instead of unsigned long.
1048  */
1049
1050 typedef unsigned long png_uint_32;
1051 typedef long png_int_32;
1052 typedef unsigned short png_uint_16;
1053 typedef short png_int_16;
1054 typedef unsigned char png_byte;
1055
1056 /* This is usually size_t.  It is typedef'ed just in case you need it to
1057    change (I'm not sure if you will or not, so I thought I'd be safe) */
1058 #ifdef PNG_SIZE_T
1059    typedef PNG_SIZE_T png_size_t;
1060 #  define png_sizeof(x) png_convert_size(sizeof (x))
1061 #else
1062    typedef size_t png_size_t;
1063 #  define png_sizeof(x) sizeof (x)
1064 #endif
1065
1066 /* The following is needed for medium model support.  It cannot be in the
1067  * PNG_INTERNAL section.  Needs modification for other compilers besides
1068  * MSC.  Model independent support declares all arrays and pointers to be
1069  * large using the far keyword.  The zlib version used must also support
1070  * model independent data.  As of version zlib 1.0.4, the necessary changes
1071  * have been made in zlib.  The USE_FAR_KEYWORD define triggers other
1072  * changes that are needed. (Tim Wegner)
1073  */
1074
1075 /* Separate compiler dependencies (problem here is that zlib.h always
1076    defines FAR. (SJT) */
1077 #ifdef __BORLANDC__
1078 #  if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)
1079 #    define LDATA 1
1080 #  else
1081 #    define LDATA 0
1082 #  endif
1083    /* GRR:  why is Cygwin in here?  Cygwin is not Borland C... */
1084 #  if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)
1085 #    define PNG_MAX_MALLOC_64K
1086 #    if (LDATA != 1)
1087 #      ifndef FAR
1088 #        define FAR __far
1089 #      endif
1090 #      define USE_FAR_KEYWORD
1091 #    endif   /* LDATA != 1 */
1092      /* Possibly useful for moving data out of default segment.
1093       * Uncomment it if you want. Could also define FARDATA as
1094       * const if your compiler supports it. (SJT)
1095 #    define FARDATA FAR
1096       */
1097 #  endif  /* __WIN32__, __FLAT__, __CYGWIN__ */
1098 #endif   /* __BORLANDC__ */
1099
1100
1101 /* Suggest testing for specific compiler first before testing for
1102  * FAR.  The Watcom compiler defines both __MEDIUM__ and M_I86MM,
1103  * making reliance oncertain keywords suspect. (SJT)
1104  */
1105
1106 /* MSC Medium model */
1107 #if defined(FAR)
1108 #  if defined(M_I86MM)
1109 #    define USE_FAR_KEYWORD
1110 #    define FARDATA FAR
1111 #    include <dos.h>
1112 #  endif
1113 #endif
1114
1115 /* SJT: default case */
1116 #ifndef FAR
1117 #  define FAR
1118 #endif
1119
1120 /* At this point FAR is always defined */
1121 #ifndef FARDATA
1122 #  define FARDATA
1123 #endif
1124
1125 /* Typedef for floating-point numbers that are converted
1126    to fixed-point with a multiple of 100,000, e.g., int_gamma */
1127 typedef png_int_32 png_fixed_point;
1128
1129 /* Add typedefs for pointers */
1130 typedef void            FAR * png_voidp;
1131 typedef png_byte        FAR * png_bytep;
1132 typedef png_uint_32     FAR * png_uint_32p;
1133 typedef png_int_32      FAR * png_int_32p;
1134 typedef png_uint_16     FAR * png_uint_16p;
1135 typedef png_int_16      FAR * png_int_16p;
1136 typedef PNG_CONST char  FAR * png_const_charp;
1137 typedef char            FAR * png_charp;
1138 typedef png_fixed_point FAR * png_fixed_point_p;
1139
1140 #ifndef PNG_NO_STDIO
1141 #if defined(_WIN32_WCE)
1142 typedef HANDLE                png_FILE_p;
1143 #else
1144 typedef FILE                * png_FILE_p;
1145 #endif
1146 #endif
1147
1148 #ifdef PNG_FLOATING_POINT_SUPPORTED
1149 typedef double          FAR * png_doublep;
1150 #endif
1151
1152 /* Pointers to pointers; i.e. arrays */
1153 typedef png_byte        FAR * FAR * png_bytepp;
1154 typedef png_uint_32     FAR * FAR * png_uint_32pp;
1155 typedef png_int_32      FAR * FAR * png_int_32pp;
1156 typedef png_uint_16     FAR * FAR * png_uint_16pp;
1157 typedef png_int_16      FAR * FAR * png_int_16pp;
1158 typedef PNG_CONST char  FAR * FAR * png_const_charpp;
1159 typedef char            FAR * FAR * png_charpp;
1160 typedef png_fixed_point FAR * FAR * png_fixed_point_pp;
1161 #ifdef PNG_FLOATING_POINT_SUPPORTED
1162 typedef double          FAR * FAR * png_doublepp;
1163 #endif
1164
1165 /* Pointers to pointers to pointers; i.e., pointer to array */
1166 typedef char            FAR * FAR * FAR * png_charppp;
1167
1168 #if defined(PNG_1_0_X) || defined(PNG_1_2_X)
1169 /* SPC -  Is this stuff deprecated? */
1170 /* It'll be removed as of libpng-1.3.0 - GR-P */
1171 /* libpng typedefs for types in zlib. If zlib changes
1172  * or another compression library is used, then change these.
1173  * Eliminates need to change all the source files.
1174  */
1175 typedef charf *         png_zcharp;
1176 typedef charf * FAR *   png_zcharpp;
1177 typedef z_stream FAR *  png_zstreamp;
1178 #endif /* (PNG_1_0_X) || defined(PNG_1_2_X) */
1179
1180 /*
1181  * Define PNG_BUILD_DLL if the module being built is a Windows
1182  * LIBPNG DLL.
1183  *
1184  * Define PNG_USE_DLL if you want to *link* to the Windows LIBPNG DLL.
1185  * It is equivalent to Microsoft predefined macro _DLL that is
1186  * automatically defined when you compile using the share
1187  * version of the CRT (C Run-Time library)
1188  *
1189  * The cygwin mods make this behavior a little different:
1190  * Define PNG_BUILD_DLL if you are building a dll for use with cygwin
1191  * Define PNG_STATIC if you are building a static library for use with cygwin,
1192  *   -or- if you are building an application that you want to link to the
1193  *   static library.
1194  * PNG_USE_DLL is defined by default (no user action needed) unless one of
1195  *   the other flags is defined.
1196  */
1197
1198 #if !defined(PNG_DLL) && (defined(PNG_BUILD_DLL) || defined(PNG_USE_DLL))
1199 #  define PNG_DLL
1200 #endif
1201 /* If CYGWIN, then disallow GLOBAL ARRAYS unless building a static lib.
1202  * When building a static lib, default to no GLOBAL ARRAYS, but allow
1203  * command-line override
1204  */
1205 #if defined(__CYGWIN__)
1206 #  if !defined(PNG_STATIC)
1207 #    if defined(PNG_USE_GLOBAL_ARRAYS)
1208 #      undef PNG_USE_GLOBAL_ARRAYS
1209 #    endif
1210 #    if !defined(PNG_USE_LOCAL_ARRAYS)
1211 #      define PNG_USE_LOCAL_ARRAYS
1212 #    endif
1213 #  else
1214 #    if defined(PNG_USE_LOCAL_ARRAYS) || defined(PNG_NO_GLOBAL_ARRAYS)
1215 #      if defined(PNG_USE_GLOBAL_ARRAYS)
1216 #        undef PNG_USE_GLOBAL_ARRAYS
1217 #      endif
1218 #    endif
1219 #  endif
1220 #  if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1221 #    define PNG_USE_LOCAL_ARRAYS
1222 #  endif
1223 #endif
1224
1225 /* Do not use global arrays (helps with building DLL's)
1226  * They are no longer used in libpng itself, since version 1.0.5c,
1227  * but might be required for some pre-1.0.5c applications.
1228  */
1229 #if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1230 #  if defined(PNG_NO_GLOBAL_ARRAYS) || (defined(__GNUC__) && defined(PNG_DLL))
1231 #    define PNG_USE_LOCAL_ARRAYS
1232 #  else
1233 #    define PNG_USE_GLOBAL_ARRAYS
1234 #  endif
1235 #endif
1236
1237 #if defined(__CYGWIN__)
1238 #  undef PNGAPI
1239 #  define PNGAPI __cdecl
1240 #  undef PNG_IMPEXP
1241 #  define PNG_IMPEXP
1242 #endif
1243
1244 /* If you define PNGAPI, e.g., with compiler option "-DPNGAPI=__stdcall",
1245  * you may get warnings regarding the linkage of png_zalloc and png_zfree.
1246  * Don't ignore those warnings; you must also reset the default calling
1247  * convention in your compiler to match your PNGAPI, and you must build
1248  * zlib and your applications the same way you build libpng.
1249  */
1250
1251 #if defined(__MINGW32__) && !defined(PNG_MODULEDEF)
1252 #  ifndef PNG_NO_MODULEDEF
1253 #    define PNG_NO_MODULEDEF
1254 #  endif
1255 #endif
1256
1257 #if !defined(PNG_IMPEXP) && defined(PNG_BUILD_DLL) && !defined(PNG_NO_MODULEDEF)
1258 #  define PNG_IMPEXP
1259 #endif
1260
1261 #if defined(PNG_DLL) || defined(_DLL) || defined(__DLL__ ) || \
1262     (( defined(_Windows) || defined(_WINDOWS) || \
1263        defined(WIN32) || defined(_WIN32) || defined(__WIN32__) ))
1264
1265 #  ifndef PNGAPI
1266 #     if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
1267 #        define PNGAPI __cdecl
1268 #     else
1269 #        define PNGAPI _cdecl
1270 #     endif
1271 #  endif
1272
1273 #  if !defined(PNG_IMPEXP) && (!defined(PNG_DLL) || \
1274        0 /* WINCOMPILER_WITH_NO_SUPPORT_FOR_DECLIMPEXP */)
1275 #     define PNG_IMPEXP
1276 #  endif
1277
1278 #  if !defined(PNG_IMPEXP)
1279
1280 #     define PNG_EXPORT_TYPE1(type,symbol)  PNG_IMPEXP type PNGAPI symbol
1281 #     define PNG_EXPORT_TYPE2(type,symbol)  type PNG_IMPEXP PNGAPI symbol
1282
1283       /* Borland/Microsoft */
1284 #     if defined(_MSC_VER) || defined(__BORLANDC__)
1285 #        if (_MSC_VER >= 800) || (__BORLANDC__ >= 0x500)
1286 #           define PNG_EXPORT PNG_EXPORT_TYPE1
1287 #        else
1288 #           define PNG_EXPORT PNG_EXPORT_TYPE2
1289 #           if defined(PNG_BUILD_DLL)
1290 #              define PNG_IMPEXP __export
1291 #           else
1292 #              define PNG_IMPEXP /*__import */ /* doesn't exist AFAIK in
1293                                                  VC++ */
1294 #           endif                             /* Exists in Borland C++ for
1295                                                  C++ classes (== huge) */
1296 #        endif
1297 #     endif
1298
1299 #     if !defined(PNG_IMPEXP)
1300 #        if defined(PNG_BUILD_DLL)
1301 #           define PNG_IMPEXP __declspec(dllexport)
1302 #        else
1303 #           define PNG_IMPEXP __declspec(dllimport)
1304 #        endif
1305 #     endif
1306 #  endif  /* PNG_IMPEXP */
1307 #else /* !(DLL || non-cygwin WINDOWS) */
1308 #   if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
1309 #      ifndef PNGAPI
1310 #         define PNGAPI _System
1311 #      endif
1312 #   else
1313 #      if 0 /* ... other platforms, with other meanings */
1314 #      endif
1315 #   endif
1316 #endif
1317
1318 #ifndef PNGAPI
1319 #  define PNGAPI
1320 #endif
1321 #ifndef PNG_IMPEXP
1322 #  define PNG_IMPEXP
1323 #endif
1324
1325 #ifdef PNG_BUILDSYMS
1326 #  ifndef PNG_EXPORT
1327 #    define PNG_EXPORT(type,symbol) PNG_FUNCTION_EXPORT symbol END
1328 #  endif
1329 #  ifdef PNG_USE_GLOBAL_ARRAYS
1330 #    ifndef PNG_EXPORT_VAR
1331 #      define PNG_EXPORT_VAR(type) PNG_DATA_EXPORT
1332 #    endif
1333 #  endif
1334 #endif
1335
1336 #ifndef PNG_EXPORT
1337 #  define PNG_EXPORT(type,symbol) PNG_IMPEXP type PNGAPI symbol
1338 #endif
1339
1340 #ifdef PNG_USE_GLOBAL_ARRAYS
1341 #  ifndef PNG_EXPORT_VAR
1342 #    define PNG_EXPORT_VAR(type) extern PNG_IMPEXP type
1343 #  endif
1344 #endif
1345
1346 /* User may want to use these so they are not in PNG_INTERNAL. Any library
1347  * functions that are passed far data must be model independent.
1348  */
1349
1350 #ifndef PNG_ABORT
1351 #  define PNG_ABORT() abort()
1352 #endif
1353
1354 #ifdef PNG_SETJMP_SUPPORTED
1355 #  define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf)
1356 #else
1357 #  define png_jmpbuf(png_ptr) \
1358    (LIBPNG_WAS_COMPILED_WITH__PNG_SETJMP_NOT_SUPPORTED)
1359 #endif
1360
1361 #if defined(USE_FAR_KEYWORD)  /* memory model independent fns */
1362 /* use this to make far-to-near assignments */
1363 #  define CHECK   1
1364 #  define NOCHECK 0
1365 #  define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK))
1366 #  define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK))
1367 #  define png_strcpy  _fstrcpy
1368 #  define png_strncpy _fstrncpy   /* Added to v 1.2.6 */
1369 #  define png_strlen  _fstrlen
1370 #  define png_memcmp  _fmemcmp    /* SJT: added */
1371 #  define png_memcpy  _fmemcpy
1372 #  define png_memset  _fmemset
1373 #else /* use the usual functions */
1374 #  define CVT_PTR(ptr)         (ptr)
1375 #  define CVT_PTR_NOCHECK(ptr) (ptr)
1376 #  define png_strcpy  strcpy
1377 #  define png_strncpy strncpy     /* Added to v 1.2.6 */
1378 #  define png_strlen  strlen
1379 #  define png_memcmp  memcmp      /* SJT: added */
1380 #  define png_memcpy  memcpy
1381 #  define png_memset  memset
1382 #endif
1383 /* End of memory model independent support */
1384
1385 /* Just a little check that someone hasn't tried to define something
1386  * contradictory.
1387  */
1388 #if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K)
1389 #  undef PNG_ZBUF_SIZE
1390 #  define PNG_ZBUF_SIZE 65536L
1391 #endif
1392
1393 #ifdef PNG_READ_SUPPORTED
1394 /* Prior to libpng-1.0.9, this block was in pngasmrd.h */
1395 #if defined(PNG_INTERNAL)
1396
1397 /* These are the default thresholds before the MMX code kicks in; if either
1398  * rowbytes or bitdepth is below the threshold, plain C code is used.  These
1399  * can be overridden at runtime via the png_set_mmx_thresholds() call in
1400  * libpng 1.2.0 and later.  The values below were chosen by Intel.
1401  */
1402
1403 #ifndef PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT
1404 #  define PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT  128  /*  >=  */
1405 #endif
1406 #ifndef PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT
1407 #  define PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT  9    /*  >=  */
1408 #endif
1409
1410 /* Set this in the makefile for VC++ on Pentium, not here. */
1411 /* Platform must be Pentium.  Makefile must assemble and load pngvcrd.c .
1412  * MMX will be detected at run time and used if present.
1413  */
1414 #ifdef PNG_USE_PNGVCRD
1415 #  define PNG_HAVE_ASSEMBLER_COMBINE_ROW
1416 #  define PNG_HAVE_ASSEMBLER_READ_INTERLACE
1417 #  define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
1418 #endif
1419
1420 /* Set this in the makefile for gcc/as on Pentium, not here. */
1421 /* Platform must be Pentium.  Makefile must assemble and load pnggccrd.c .
1422  * MMX will be detected at run time and used if present.
1423  */
1424 #ifdef PNG_USE_PNGGCCRD
1425 #  define PNG_HAVE_ASSEMBLER_COMBINE_ROW
1426 #  define PNG_HAVE_ASSEMBLER_READ_INTERLACE
1427 #  define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
1428 #endif
1429 /* - see pnggccrd.c for info about what is currently enabled */
1430
1431 #endif /* PNG_INTERNAL */
1432 #endif /* PNG_READ_SUPPORTED */
1433
1434 /* Added at libpng-1.2.8 */
1435 #endif /* PNG_VERSION_INFO_ONLY */
1436
1437 #endif /* PNGCONF_H */