src/png/pngconf.h

   1 /* pngconf.h - machine configurable file for libpng
   2  *
   3  * libpng 1.2.4 - July 8, 2002
   4  * For conditions of distribution and use, see copyright notice in png.h
   5  * Copyright (c) 1998-2002 Glenn Randers-Pehrson
   6  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
   7  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
   8  */
   9
  10 /* Any machine specific code is near the front of this file, so if you
  11  * are configuring libpng for a machine, you may want to read the section
  12  * starting here down to where it starts to typedef png_color, png_text,
  13  * and png_info.
  14  */
  15
  16 #ifndef PNGCONF_H
  17 #define PNGCONF_H
  18
  19 /* This is the size of the compression buffer, and thus the size of
  20  * an IDAT chunk.  Make this whatever size you feel is best for your
  21  * machine.  One of these will be allocated per png_struct.  When this
  22  * is full, it writes the data to the disk, and does some other
  23  * calculations.  Making this an extremely small size will slow
  24  * the library down, but you may want to experiment to determine
  25  * where it becomes significant, if you are concerned with memory
  26  * usage.  Note that zlib allocates at least 32Kb also.  For readers,
  27  * this describes the size of the buffer available to read the data in.
  28  * Unless this gets smaller than the size of a row (compressed),
  29  * it should not make much difference how big this is.
  30  */
  31
  32 #ifndef PNG_ZBUF_SIZE
  33 #  define PNG_ZBUF_SIZE 8192
  34 #endif
  35
  36 /* Enable if you want a write-only libpng */
  37
  38 #ifndef PNG_NO_READ_SUPPORTED
  39 #  define PNG_READ_SUPPORTED
  40 #endif
  41
  42 /* Enable if you want a read-only libpng */
  43
  44 #ifndef PNG_NO_WRITE_SUPPORTED
  45 #  define PNG_WRITE_SUPPORTED
  46 #endif
  47
  48 /* Enabled by default in 1.2.0.  You can disable this if you don't need to
  49    support PNGs that are embedded in MNG datastreams */
  50 #if !defined(PNG_1_0_X) && !defined(PNG_NO_MNG_FEATURES)
  51 #  ifndef PNG_MNG_FEATURES_SUPPORTED
  52 #    define PNG_MNG_FEATURES_SUPPORTED
  53 #  endif
  54 #endif
  55
  56 #ifndef PNG_NO_FLOATING_POINT_SUPPORTED
  57 #  ifndef PNG_FLOATING_POINT_SUPPORTED
  58 #    define PNG_FLOATING_POINT_SUPPORTED
  59 #  endif
  60 #endif
  61
  62 /* If you are running on a machine where you cannot allocate more
  63  * than 64K of memory at once, uncomment this.  While libpng will not
  64  * normally need that much memory in a chunk (unless you load up a very
  65  * large file), zlib needs to know how big of a chunk it can use, and
  66  * libpng thus makes sure to check any memory allocation to verify it
  67  * will fit into memory.
  68 #define PNG_MAX_MALLOC_64K
  69  */
  70 #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
  71 #  define PNG_MAX_MALLOC_64K
  72 #endif
  73
  74 /* Special munging to support doing things the 'cygwin' way:
  75  * 'Normal' png-on-win32 defines/defaults:
  76  *   PNG_BUILD_DLL -- building dll
  77  *   PNG_USE_DLL   -- building an application, linking to dll
  78  *   (no define)   -- building static library, or building an
  79  *                    application and linking to the static lib
  80  * 'Cygwin' defines/defaults:
  81  *   PNG_BUILD_DLL -- (ignored) building the dll
  82  *   (no define)   -- (ignored) building an application, linking to the dll
  83  *   PNG_STATIC    -- (ignored) building the static lib, or building an
  84  *                    application that links to the static lib.
  85  *   ALL_STATIC    -- (ignored) building various static libs, or building an
  86  *                    application that links to the static libs.
  87  * Thus,
  88  * a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and
  89  * this bit of #ifdefs will define the 'correct' config variables based on
  90  * that. If a cygwin user *wants* to define 'PNG_USE_DLL' that's okay, but
  91  * unnecessary.
  92  *
  93  * Also, the precedence order is:
  94  *   ALL_STATIC (since we can't #undef something outside our namespace)
  95  *   PNG_BUILD_DLL
  96  *   PNG_STATIC
  97  *   (nothing) == PNG_USE_DLL
  98  *
  99  * CYGWIN (2002-01-20): The preceding is now obsolete. With the advent
 100  *   of auto-import in binutils, we no longer need to worry about
 101  *   __declspec(dllexport) / __declspec(dllimport) and friends.  Therefore,
 102  *   we don't need to worry about PNG_STATIC or ALL_STATIC when it comes
 103  *   to __declspec() stuff.  However, we DO need to worry about
 104  *   PNG_BUILD_DLL and PNG_STATIC because those change some defaults
 105  *   such as CONSOLE_IO and whether GLOBAL_ARRAYS are allowed.
 106  */
 107 #if defined(__CYGWIN__)
 108 #  if defined(ALL_STATIC)
 109 #    if defined(PNG_BUILD_DLL)
 110 #      undef PNG_BUILD_DLL
 111 #    endif
 112 #    if defined(PNG_USE_DLL)
 113 #      undef PNG_USE_DLL
 114 #    endif
 115 #    if defined(PNG_DLL)
 116 #      undef PNG_DLL
 117 #    endif
 118 #    if !defined(PNG_STATIC)
 119 #      define PNG_STATIC
 120 #    endif
 121 #  else
 122 #    if defined (PNG_BUILD_DLL)
 123 #      if defined(PNG_STATIC)
 124 #        undef PNG_STATIC
 125 #      endif
 126 #      if defined(PNG_USE_DLL)
 127 #        undef PNG_USE_DLL
 128 #      endif
 129 #      if !defined(PNG_DLL)
 130 #        define PNG_DLL
 131 #      endif
 132 #    else
 133 #      if defined(PNG_STATIC)
 134 #        if defined(PNG_USE_DLL)
 135 #          undef PNG_USE_DLL
 136 #        endif
 137 #        if defined(PNG_DLL)
 138 #          undef PNG_DLL
 139 #        endif
 140 #      else
 141 #        if !defined(PNG_USE_DLL)
 142 #          define PNG_USE_DLL
 143 #        endif
 144 #        if !defined(PNG_DLL)
 145 #          define PNG_DLL
 146 #        endif
 147 #      endif
 148 #    endif
 149 #  endif
 150 #endif
 151
 152 /* This protects us against compilers that run on a windowing system
 153  * and thus don't have or would rather us not use the stdio types:
 154  * stdin, stdout, and stderr.  The only one currently used is stderr
 155  * in png_error() and png_warning().  #defining PNG_NO_CONSOLE_IO will
 156  * prevent these from being compiled and used. #defining PNG_NO_STDIO
 157  * will also prevent these, plus will prevent the entire set of stdio
 158  * macros and functions (FILE *, printf, etc.) from being compiled and used,
 159  * unless (PNG_DEBUG > 0) has been #defined.
 160  *
 161  * #define PNG_NO_CONSOLE_IO
 162  * #define PNG_NO_STDIO
 163  */
 164
 165 #if defined(_WIN32_WCE)
 166 #  include <windows.h>
 167    /* Console I/O functions are not supported on WindowsCE */
 168 #  define PNG_NO_CONSOLE_IO
 169 #  ifdef PNG_DEBUG
 170 #    undef PNG_DEBUG
 171 #  endif
 172 #endif
 173
 174 #ifdef PNG_BUILD_DLL
 175 #  ifndef PNG_CONSOLE_IO_SUPPORTED
 176 #    ifndef PNG_NO_CONSOLE_IO
 177 #      define PNG_NO_CONSOLE_IO
 178 #    endif
 179 #  endif
 180 #endif
 181
 182 #  ifdef PNG_NO_STDIO
 183 #    ifndef PNG_NO_CONSOLE_IO
 184 #      define PNG_NO_CONSOLE_IO
 185 #    endif
 186 #    ifdef PNG_DEBUG
 187 #      if (PNG_DEBUG > 0)
 188 #        include <stdio.h>
 189 #      endif
 190 #    endif
 191 #  else
 192 #    if !defined(_WIN32_WCE)
 193 /* "stdio.h" functions are not supported on WindowsCE */
 194 #      include <stdio.h>
 195 #    endif
 196 #  endif
 197
 198 /* This macro protects us against machines that don't have function
 199  * prototypes (ie K&R style headers).  If your compiler does not handle
 200  * function prototypes, define this macro and use the included ansi2knr.
 201  * I've always been able to use _NO_PROTO as the indicator, but you may
 202  * need to drag the empty declaration out in front of here, or change the
 203  * ifdef to suit your own needs.
 204  */
 205 #ifndef PNGARG
 206
 207 #ifdef OF /* zlib prototype munger */
 208 #  define PNGARG(arglist) OF(arglist)
 209 #else
 210
 211 #ifdef _NO_PROTO
 212 #  define PNGARG(arglist) ()
 213 #  ifndef PNG_TYPECAST_NULL
 214 #     define PNG_TYPECAST_NULL
 215 #  endif
 216 #else
 217 #  define PNGARG(arglist) arglist
 218 #endif /* _NO_PROTO */
 219
 220 #endif /* OF */
 221
 222 #endif /* PNGARG */
 223
 224 /* Try to determine if we are compiling on a Mac.  Note that testing for
 225  * just __MWERKS__ is not good enough, because the Codewarrior is now used
 226  * on non-Mac platforms.
 227  */
 228 #ifndef MACOS
 229 #  if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
 230       defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC)
 231 #    define MACOS
 232 #  endif
 233 #endif
 234
 235 /* enough people need this for various reasons to include it here */
 236 #if !defined(MACOS) && !defined(RISCOS) && !defined(_WIN32_WCE)
 237 #  include <sys/types.h>
 238 #endif
 239
 240 #if !defined(PNG_SETJMP_NOT_SUPPORTED) && !defined(PNG_NO_SETJMP_SUPPORTED)
 241 #  define PNG_SETJMP_SUPPORTED
 242 #endif
 243
 244 #ifdef PNG_SETJMP_SUPPORTED
 245 /* This is an attempt to force a single setjmp behaviour on Linux.  If
 246  * the X config stuff didn't define _BSD_SOURCE we wouldn't need this.
 247  */
 248
 249 #  ifdef __linux__
 250 #    ifdef _BSD_SOURCE
 251 #      define PNG_SAVE_BSD_SOURCE
 252 #      undef _BSD_SOURCE
 253 #    endif
 254 #    ifdef _SETJMP_H
 255       __png.h__ already includes setjmp.h;
 256       __dont__ include it again.;
 257 #    endif
 258 #  endif /* __linux__ */
 259
 260    /* include setjmp.h for error handling */
 261 #  include <setjmp.h>
 262
 263 #  ifdef __linux__
 264 #    ifdef PNG_SAVE_BSD_SOURCE
 265 #      define _BSD_SOURCE
 266 #      undef PNG_SAVE_BSD_SOURCE
 267 #    endif
 268 #  endif /* __linux__ */
 269 #endif /* PNG_SETJMP_SUPPORTED */
 270
 271 #ifdef BSD
 272 #  include <strings.h>
 273 #else
 274 #  include <string.h>
 275 #endif
 276
 277 /* Other defines for things like memory and the like can go here.  */
 278 #ifdef PNG_INTERNAL
 279
 280 #include <stdlib.h>
 281
 282 /* The functions exported by PNG_EXTERN are PNG_INTERNAL functions, which
 283  * aren't usually used outside the library (as far as I know), so it is
 284  * debatable if they should be exported at all.  In the future, when it is
 285  * possible to have run-time registry of chunk-handling functions, some of
 286  * these will be made available again.
 287 #define PNG_EXTERN extern
 288  */
 289 #define PNG_EXTERN
 290
 291 /* Other defines specific to compilers can go here.  Try to keep
 292  * them inside an appropriate ifdef/endif pair for portability.
 293  */
 294
 295 #if defined(PNG_FLOATING_POINT_SUPPORTED)
 296 #  if defined(MACOS)
 297      /* We need to check that <math.h> hasn't already been included earlier
 298       * as it seems it doesn't agree with <fp.h>, yet we should really use
 299       * <fp.h> if possible.
 300       */
 301 #    if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__)
 302 #      include <fp.h>
 303 #    endif
 304 #  else
 305 #    include <math.h>
 306 #  endif
 307 #  if defined(_AMIGA) && defined(__SASC) && defined(_M68881)
 308      /* Amiga SAS/C: We must include builtin FPU functions when compiling using
 309       * MATH=68881
 310       */
 311 #    include <m68881.h>
 312 #  endif
 313 #endif
 314
 315 /* Codewarrior on NT has linking problems without this. */
 316 #if (defined(__MWERKS__) && defined(WIN32)) || defined(__STDC__)
 317 #  define PNG_ALWAYS_EXTERN
 318 #endif
 319
 320 /* For some reason, Borland C++ defines memcmp, etc. in mem.h, not
 321  * stdlib.h like it should (I think).  Or perhaps this is a C++
 322  * "feature"?
 323  */
 324 #ifdef __TURBOC__
 325 #  include <mem.h>
 326 #  include "alloc.h"
 327 #endif
 328
 329 #if defined(_MSC_VER) && (defined(WIN32) || defined(_Windows) || \
 330     defined(_WINDOWS) || defined(_WIN32) || defined(__WIN32__))
 331 #  include <malloc.h>
 332 #endif
 333
 334 /* This controls how fine the dithering gets.  As this allocates
 335  * a largish chunk of memory (32K), those who are not as concerned
 336  * with dithering quality can decrease some or all of these.
 337  */
 338 #ifndef PNG_DITHER_RED_BITS
 339 #  define PNG_DITHER_RED_BITS 5
 340 #endif
 341 #ifndef PNG_DITHER_GREEN_BITS
 342 #  define PNG_DITHER_GREEN_BITS 5
 343 #endif
 344 #ifndef PNG_DITHER_BLUE_BITS
 345 #  define PNG_DITHER_BLUE_BITS 5
 346 #endif
 347
 348 /* This controls how fine the gamma correction becomes when you
 349  * are only interested in 8 bits anyway.  Increasing this value
 350  * results in more memory being used, and more pow() functions
 351  * being called to fill in the gamma tables.  Don't set this value
 352  * less then 8, and even that may not work (I haven't tested it).
 353  */
 354
 355 #ifndef PNG_MAX_GAMMA_8
 356 #  define PNG_MAX_GAMMA_8 11
 357 #endif
 358
 359 /* This controls how much a difference in gamma we can tolerate before
 360  * we actually start doing gamma conversion.
 361  */
 362 #ifndef PNG_GAMMA_THRESHOLD
 363 #  define PNG_GAMMA_THRESHOLD 0.05
 364 #endif
 365
 366 #endif /* PNG_INTERNAL */
 367
 368 /* The following uses const char * instead of char * for error
 369  * and warning message functions, so some compilers won't complain.
 370  * If you do not want to use const, define PNG_NO_CONST here.
 371  */
 372
 373 #ifndef PNG_NO_CONST
 374 #  define PNG_CONST const
 375 #else
 376 #  define PNG_CONST
 377 #endif
 378
 379 /* The following defines give you the ability to remove code from the
 380  * library that you will not be using.  I wish I could figure out how to
 381  * automate this, but I can't do that without making it seriously hard
 382  * on the users.  So if you are not using an ability, change the #define
 383  * to and #undef, and that part of the library will not be compiled.  If
 384  * your linker can't find a function, you may want to make sure the
 385  * ability is defined here.  Some of these depend upon some others being
 386  * defined.  I haven't figured out all the interactions here, so you may
 387  * have to experiment awhile to get everything to compile.  If you are
 388  * creating or using a shared library, you probably shouldn't touch this,
 389  * as it will affect the size of the structures, and this will cause bad
 390  * things to happen if the library and/or application ever change.
 391  */
 392
 393 /* Any features you will not be using can be undef'ed here */
 394
 395 /* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user
 396  * to turn it off with "*TRANSFORMS_NOT_SUPPORTED" or *PNG_NO_*_TRANSFORMS
 397  * on the compile line, then pick and choose which ones to define without
 398  * having to edit this file. It is safe to use the *TRANSFORMS_NOT_SUPPORTED
 399  * if you only want to have a png-compliant reader/writer but don't need
 400  * any of the extra transformations.  This saves about 80 kbytes in a
 401  * typical installation of the library. (PNG_NO_* form added in version
 402  * 1.0.1c, for consistency)
 403  */
 404
 405 /* The size of the png_text structure changed in libpng-1.0.6 when
 406  * iTXt is supported.  It is turned off by default, to support old apps
 407  * that malloc the png_text structure instead of calling png_set_text()
 408  * and letting libpng malloc it.  It will be turned on by default in
 409  * libpng-1.3.0.
 410  */
 411
 412 #ifndef PNG_iTXt_SUPPORTED
 413 #  if !defined(PNG_READ_iTXt_SUPPORTED) && !defined(PNG_NO_READ_iTXt)
 414 #    define PNG_NO_READ_iTXt
 415 #  endif
 416 #  if !defined(PNG_WRITE_iTXt_SUPPORTED) && !defined(PNG_NO_WRITE_iTXt)
 417 #    define PNG_NO_WRITE_iTXt
 418 #  endif
 419 #endif
 420
 421 /* The following support, added after version 1.0.0, can be turned off here en
 422  * masse by defining PNG_LEGACY_SUPPORTED in case you need binary compatibility
 423  * with old applications that require the length of png_struct and png_info
 424  * to remain unchanged.
 425  */
 426
 427 #ifdef PNG_LEGACY_SUPPORTED
 428 #  define PNG_NO_FREE_ME
 429 #  define PNG_NO_READ_UNKNOWN_CHUNKS
 430 #  define PNG_NO_WRITE_UNKNOWN_CHUNKS
 431 #  define PNG_NO_READ_USER_CHUNKS
 432 #  define PNG_NO_READ_iCCP
 433 #  define PNG_NO_WRITE_iCCP
 434 #  define PNG_NO_READ_iTXt
 435 #  define PNG_NO_WRITE_iTXt
 436 #  define PNG_NO_READ_sCAL
 437 #  define PNG_NO_WRITE_sCAL
 438 #  define PNG_NO_READ_sPLT
 439 #  define PNG_NO_WRITE_sPLT
 440 #  define PNG_NO_INFO_IMAGE
 441 #  define PNG_NO_READ_RGB_TO_GRAY
 442 #  define PNG_NO_READ_USER_TRANSFORM
 443 #  define PNG_NO_WRITE_USER_TRANSFORM
 444 #  define PNG_NO_USER_MEM
 445 #  define PNG_NO_READ_EMPTY_PLTE
 446 #  define PNG_NO_MNG_FEATURES
 447 #  define PNG_NO_FIXED_POINT_SUPPORTED
 448 #endif
 449
 450 /* Ignore attempt to turn off both floating and fixed point support */
 451 #if !defined(PNG_FLOATING_POINT_SUPPORTED) || \
 452     !defined(PNG_NO_FIXED_POINT_SUPPORTED)
 453 #  define PNG_FIXED_POINT_SUPPORTED
 454 #endif
 455
 456 #ifndef PNG_NO_FREE_ME
 457 #  define PNG_FREE_ME_SUPPORTED
 458 #endif
 459
 460 #if defined(PNG_READ_SUPPORTED)
 461
 462 #if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \
 463       !defined(PNG_NO_READ_TRANSFORMS)
 464 #  define PNG_READ_TRANSFORMS_SUPPORTED
 465 #endif
 466
 467 #ifdef PNG_READ_TRANSFORMS_SUPPORTED
 468 #  ifndef PNG_NO_READ_EXPAND
 469 #    define PNG_READ_EXPAND_SUPPORTED
 470 #  endif
 471 #  ifndef PNG_NO_READ_SHIFT
 472 #    define PNG_READ_SHIFT_SUPPORTED
 473 #  endif
 474 #  ifndef PNG_NO_READ_PACK
 475 #    define PNG_READ_PACK_SUPPORTED
 476 #  endif
 477 #  ifndef PNG_NO_READ_BGR
 478 #    define PNG_READ_BGR_SUPPORTED
 479 #  endif
 480 #  ifndef PNG_NO_READ_SWAP
 481 #    define PNG_READ_SWAP_SUPPORTED
 482 #  endif
 483 #  ifndef PNG_NO_READ_PACKSWAP
 484 #    define PNG_READ_PACKSWAP_SUPPORTED
 485 #  endif
 486 #  ifndef PNG_NO_READ_INVERT
 487 #    define PNG_READ_INVERT_SUPPORTED
 488 #  endif
 489 #  ifndef PNG_NO_READ_DITHER
 490 #    define PNG_READ_DITHER_SUPPORTED
 491 #  endif
 492 #  ifndef PNG_NO_READ_BACKGROUND
 493 #    define PNG_READ_BACKGROUND_SUPPORTED
 494 #  endif
 495 #  ifndef PNG_NO_READ_16_TO_8
 496 #    define PNG_READ_16_TO_8_SUPPORTED
 497 #  endif
 498 #  ifndef PNG_NO_READ_FILLER
 499 #    define PNG_READ_FILLER_SUPPORTED
 500 #  endif
 501 #  ifndef PNG_NO_READ_GAMMA
 502 #    define PNG_READ_GAMMA_SUPPORTED
 503 #  endif
 504 #  ifndef PNG_NO_READ_GRAY_TO_RGB
 505 #    define PNG_READ_GRAY_TO_RGB_SUPPORTED
 506 #  endif
 507 #  ifndef PNG_NO_READ_SWAP_ALPHA
 508 #    define PNG_READ_SWAP_ALPHA_SUPPORTED
 509 #  endif
 510 #  ifndef PNG_NO_READ_INVERT_ALPHA
 511 #    define PNG_READ_INVERT_ALPHA_SUPPORTED
 512 #  endif
 513 #  ifndef PNG_NO_READ_STRIP_ALPHA
 514 #    define PNG_READ_STRIP_ALPHA_SUPPORTED
 515 #  endif
 516 #  ifndef PNG_NO_READ_USER_TRANSFORM
 517 #    define PNG_READ_USER_TRANSFORM_SUPPORTED
 518 #  endif
 519 #  ifndef PNG_NO_READ_RGB_TO_GRAY
 520 #    define PNG_READ_RGB_TO_GRAY_SUPPORTED
 521 #  endif
 522 #endif /* PNG_READ_TRANSFORMS_SUPPORTED */
 523
 524 #if !defined(PNG_NO_PROGRESSIVE_READ) && \
 525  !defined(PNG_PROGRESSIVE_READ_NOT_SUPPORTED)  /* if you don't do progressive */
 526 #  define PNG_PROGRESSIVE_READ_SUPPORTED     /* reading.  This is not talking */
 527 #endif                               /* about interlacing capability!  You'll */
 528               /* still have interlacing unless you change the following line: */
 529
 530 #define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */
 531
 532 #ifndef PNG_NO_READ_COMPOSITE_NODIV
 533 #  ifndef PNG_NO_READ_COMPOSITED_NODIV  /* libpng-1.0.x misspelling */
 534 #    define PNG_READ_COMPOSITE_NODIV_SUPPORTED   /* well tested on Intel, SGI */
 535 #  endif
 536 #endif
 537
 538 /* Deprecated, will be removed from version 2.0.0.
 539    Use PNG_MNG_FEATURES_SUPPORTED instead. */
 540 #ifndef PNG_NO_READ_EMPTY_PLTE
 541 #  define PNG_READ_EMPTY_PLTE_SUPPORTED
 542 #endif
 543
 544 #endif /* PNG_READ_SUPPORTED */
 545
 546 #if defined(PNG_WRITE_SUPPORTED)
 547
 548 # if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \
 549     !defined(PNG_NO_WRITE_TRANSFORMS)
 550 #  define PNG_WRITE_TRANSFORMS_SUPPORTED
 551 #endif
 552
 553 #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
 554 #  ifndef PNG_NO_WRITE_SHIFT
 555 #    define PNG_WRITE_SHIFT_SUPPORTED
 556 #  endif
 557 #  ifndef PNG_NO_WRITE_PACK
 558 #    define PNG_WRITE_PACK_SUPPORTED
 559 #  endif
 560 #  ifndef PNG_NO_WRITE_BGR
 561 #    define PNG_WRITE_BGR_SUPPORTED
 562 #  endif
 563 #  ifndef PNG_NO_WRITE_SWAP
 564 #    define PNG_WRITE_SWAP_SUPPORTED
 565 #  endif
 566 #  ifndef PNG_NO_WRITE_PACKSWAP
 567 #    define PNG_WRITE_PACKSWAP_SUPPORTED
 568 #  endif
 569 #  ifndef PNG_NO_WRITE_INVERT
 570 #    define PNG_WRITE_INVERT_SUPPORTED
 571 #  endif
 572 #  ifndef PNG_NO_WRITE_FILLER
 573 #    define PNG_WRITE_FILLER_SUPPORTED   /* same as WRITE_STRIP_ALPHA */
 574 #  endif
 575 #  ifndef PNG_NO_WRITE_SWAP_ALPHA
 576 #    define PNG_WRITE_SWAP_ALPHA_SUPPORTED
 577 #  endif
 578 #  ifndef PNG_NO_WRITE_INVERT_ALPHA
 579 #    define PNG_WRITE_INVERT_ALPHA_SUPPORTED
 580 #  endif
 581 #  ifndef PNG_NO_WRITE_USER_TRANSFORM
 582 #    define PNG_WRITE_USER_TRANSFORM_SUPPORTED
 583 #  endif
 584 #endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */
 585
 586 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
 587     defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
 588 #  ifndef PNG_NO_USER_TRANSFORM_PTR
 589 #    define PNG_USER_TRANSFORM_PTR_SUPPORTED
 590 #  endif
 591 #endif
 592
 593 #define PNG_WRITE_INTERLACING_SUPPORTED  /* not required for PNG-compliant
 594                                             encoders, but can cause trouble
 595                                             if left undefined */
 596
 597 #if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \
 598      defined(PNG_FLOATING_POINT_SUPPORTED)
 599 #  define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
 600 #endif
 601
 602 #ifndef PNG_1_0_X
 603 #ifndef PNG_NO_ERROR_NUMBERS
 604 #define PNG_ERROR_NUMBERS_SUPPORTED
 605 #endif
 606 #endif /* PNG_1_0_X */
 607
 608 #ifndef PNG_NO_WRITE_FLUSH
 609 #  define PNG_WRITE_FLUSH_SUPPORTED
 610 #endif
 611
 612 /* Deprecated, see PNG_MNG_FEATURES_SUPPORTED, above */
 613 #ifndef PNG_NO_WRITE_EMPTY_PLTE
 614 #  define PNG_WRITE_EMPTY_PLTE_SUPPORTED
 615 #endif
 616
 617 #endif /* PNG_WRITE_SUPPORTED */
 618
 619 #ifndef PNG_NO_STDIO
 620 #  define PNG_TIME_RFC1123_SUPPORTED
 621 #endif
 622
 623 /* This adds extra functions in pngget.c for accessing data from the
 624  * info pointer (added in version 0.99)
 625  * png_get_image_width()
 626  * png_get_image_height()
 627  * png_get_bit_depth()
 628  * png_get_color_type()
 629  * png_get_compression_type()
 630  * png_get_filter_type()
 631  * png_get_interlace_type()
 632  * png_get_pixel_aspect_ratio()
 633  * png_get_pixels_per_meter()
 634  * png_get_x_offset_pixels()
 635  * png_get_y_offset_pixels()
 636  * png_get_x_offset_microns()
 637  * png_get_y_offset_microns()
 638  */
 639 #if !defined(PNG_NO_EASY_ACCESS) && !defined(PNG_EASY_ACCESS_SUPPORTED)
 640 #  define PNG_EASY_ACCESS_SUPPORTED
 641 #endif
 642
 643 /* PNG_ASSEMBLER_CODE was enabled by default in version 1.2.0
 644    even when PNG_USE_PNGVCRD or PNG_USE_PNGGCCRD is not defined */
 645 #if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_ASSEMBLER_CODE)
 646 #  ifndef PNG_ASSEMBLER_CODE_SUPPORTED
 647 #    define PNG_ASSEMBLER_CODE_SUPPORTED
 648 #  endif
 649 #  if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
 650 #    define PNG_MMX_CODE_SUPPORTED
 651 #  endif
 652 #endif
 653
 654 /* If you are sure that you don't need thread safety and you are compiling
 655    with PNG_USE_PNGCCRD for an MMX application, you can define this for
 656    faster execution.  See pnggccrd.c.
 657 #define PNG_THREAD_UNSAFE_OK
 658 */
 659
 660 #if !defined(PNG_1_0_X)
 661 #if !defined(PNG_NO_USER_MEM) && !defined(PNG_USER_MEM_SUPPORTED)
 662 #  define PNG_USER_MEM_SUPPORTED
 663 #endif
 664 #endif /* PNG_1_0_X */
 665
 666 /* These are currently experimental features, define them if you want */
 667
 668 /* very little testing */
 669 /*
 670 #ifdef PNG_READ_SUPPORTED
 671 #  ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
 672 #    define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
 673 #  endif
 674 #endif
 675 */
 676
 677 /* This is only for PowerPC big-endian and 680x0 systems */
 678 /* some testing */
 679 /*
 680 #ifdef PNG_READ_SUPPORTED
 681 #  ifndef PNG_PNG_READ_BIG_ENDIAN_SUPPORTED
 682 #    define PNG_READ_BIG_ENDIAN_SUPPORTED
 683 #  endif
 684 #endif
 685 */
 686
 687 /* Buggy compilers (e.g., gcc 2.7.2.2) need this */
 688 /*
 689 #define PNG_NO_POINTER_INDEXING
 690 */
 691
 692 /* These functions are turned off by default, as they will be phased out. */
 693 /*
 694 #define  PNG_USELESS_TESTS_SUPPORTED
 695 #define  PNG_CORRECT_PALETTE_SUPPORTED
 696 */
 697
 698 /* Any chunks you are not interested in, you can undef here.  The
 699  * ones that allocate memory may be expecially important (hIST,
 700  * tEXt, zTXt, tRNS, pCAL).  Others will just save time and make png_info
 701  * a bit smaller.
 702  */
 703
 704 #if defined(PNG_READ_SUPPORTED) && \
 705     !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
 706     !defined(PNG_NO_READ_ANCILLARY_CHUNKS)
 707 #  define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
 708 #endif
 709
 710 #if defined(PNG_WRITE_SUPPORTED) && \
 711     !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
 712     !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS)
 713 #  define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
 714 #endif
 715
 716 #ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
 717
 718 #ifdef PNG_NO_READ_TEXT
 719 #  define PNG_NO_READ_iTXt
 720 #  define PNG_NO_READ_tEXt
 721 #  define PNG_NO_READ_zTXt
 722 #endif
 723 #ifndef PNG_NO_READ_bKGD
 724 #  define PNG_READ_bKGD_SUPPORTED
 725 #  define PNG_bKGD_SUPPORTED
 726 #endif
 727 #ifndef PNG_NO_READ_cHRM
 728 #  define PNG_READ_cHRM_SUPPORTED
 729 #  define PNG_cHRM_SUPPORTED
 730 #endif
 731 #ifndef PNG_NO_READ_gAMA
 732 #  define PNG_READ_gAMA_SUPPORTED
 733 #  define PNG_gAMA_SUPPORTED
 734 #endif
 735 #ifndef PNG_NO_READ_hIST
 736 #  define PNG_READ_hIST_SUPPORTED
 737 #  define PNG_hIST_SUPPORTED
 738 #endif
 739 #ifndef PNG_NO_READ_iCCP
 740 #  define PNG_READ_iCCP_SUPPORTED
 741 #  define PNG_iCCP_SUPPORTED
 742 #endif
 743 #ifndef PNG_NO_READ_iTXt
 744 #  ifndef PNG_READ_iTXt_SUPPORTED
 745 #    define PNG_READ_iTXt_SUPPORTED
 746 #  endif
 747 #  ifndef PNG_iTXt_SUPPORTED
 748 #    define PNG_iTXt_SUPPORTED
 749 #  endif
 750 #endif
 751 #ifndef PNG_NO_READ_oFFs
 752 #  define PNG_READ_oFFs_SUPPORTED
 753 #  define PNG_oFFs_SUPPORTED
 754 #endif
 755 #ifndef PNG_NO_READ_pCAL
 756 #  define PNG_READ_pCAL_SUPPORTED
 757 #  define PNG_pCAL_SUPPORTED
 758 #endif
 759 #ifndef PNG_NO_READ_sCAL
 760 #  define PNG_READ_sCAL_SUPPORTED
 761 #  define PNG_sCAL_SUPPORTED
 762 #endif
 763 #ifndef PNG_NO_READ_pHYs
 764 #  define PNG_READ_pHYs_SUPPORTED
 765 #  define PNG_pHYs_SUPPORTED
 766 #endif
 767 #ifndef PNG_NO_READ_sBIT
 768 #  define PNG_READ_sBIT_SUPPORTED
 769 #  define PNG_sBIT_SUPPORTED
 770 #endif
 771 #ifndef PNG_NO_READ_sPLT
 772 #  define PNG_READ_sPLT_SUPPORTED
 773 #  define PNG_sPLT_SUPPORTED
 774 #endif
 775 #ifndef PNG_NO_READ_sRGB
 776 #  define PNG_READ_sRGB_SUPPORTED
 777 #  define PNG_sRGB_SUPPORTED
 778 #endif
 779 #ifndef PNG_NO_READ_tEXt
 780 #  define PNG_READ_tEXt_SUPPORTED
 781 #  define PNG_tEXt_SUPPORTED
 782 #endif
 783 #ifndef PNG_NO_READ_tIME
 784 #  define PNG_READ_tIME_SUPPORTED
 785 #  define PNG_tIME_SUPPORTED
 786 #endif
 787 #ifndef PNG_NO_READ_tRNS
 788 #  define PNG_READ_tRNS_SUPPORTED
 789 #  define PNG_tRNS_SUPPORTED
 790 #endif
 791 #ifndef PNG_NO_READ_zTXt
 792 #  define PNG_READ_zTXt_SUPPORTED
 793 #  define PNG_zTXt_SUPPORTED
 794 #endif
 795 #ifndef PNG_NO_READ_UNKNOWN_CHUNKS
 796 #  define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
 797 #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
 798 #    define PNG_UNKNOWN_CHUNKS_SUPPORTED
 799 #  endif
 800 #  ifndef PNG_NO_HANDLE_AS_UNKNOWN
 801 #    define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
 802 #  endif
 803 #endif
 804 #if !defined(PNG_NO_READ_USER_CHUNKS) && \
 805      defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
 806 #  define PNG_READ_USER_CHUNKS_SUPPORTED
 807 #  define PNG_USER_CHUNKS_SUPPORTED
 808 #  ifdef PNG_NO_READ_UNKNOWN_CHUNKS
 809 #    undef PNG_NO_READ_UNKNOWN_CHUNKS
 810 #  endif
 811 #  ifdef PNG_NO_HANDLE_AS_UNKNOWN
 812 #    undef PNG_NO_HANDLE_AS_UNKNOWN
 813 #  endif
 814 #endif
 815 #ifndef PNG_NO_READ_OPT_PLTE
 816 #  define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */
 817 #endif                      /* optional PLTE chunk in RGB and RGBA images */
 818 #if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \
 819     defined(PNG_READ_zTXt_SUPPORTED)
 820 #  define PNG_READ_TEXT_SUPPORTED
 821 #  define PNG_TEXT_SUPPORTED
 822 #endif
 823
 824 #endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */
 825
 826 #ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
 827
 828 #ifdef PNG_NO_WRITE_TEXT
 829 #  define PNG_NO_WRITE_iTXt
 830 #  define PNG_NO_WRITE_tEXt
 831 #  define PNG_NO_WRITE_zTXt
 832 #endif
 833 #ifndef PNG_NO_WRITE_bKGD
 834 #  define PNG_WRITE_bKGD_SUPPORTED
 835 #  ifndef PNG_bKGD_SUPPORTED
 836 #    define PNG_bKGD_SUPPORTED
 837 #  endif
 838 #endif
 839 #ifndef PNG_NO_WRITE_cHRM
 840 #  define PNG_WRITE_cHRM_SUPPORTED
 841 #  ifndef PNG_cHRM_SUPPORTED
 842 #    define PNG_cHRM_SUPPORTED
 843 #  endif
 844 #endif
 845 #ifndef PNG_NO_WRITE_gAMA
 846 #  define PNG_WRITE_gAMA_SUPPORTED
 847 #  ifndef PNG_gAMA_SUPPORTED
 848 #    define PNG_gAMA_SUPPORTED
 849 #  endif
 850 #endif
 851 #ifndef PNG_NO_WRITE_hIST
 852 #  define PNG_WRITE_hIST_SUPPORTED
 853 #  ifndef PNG_hIST_SUPPORTED
 854 #    define PNG_hIST_SUPPORTED
 855 #  endif
 856 #endif
 857 #ifndef PNG_NO_WRITE_iCCP
 858 #  define PNG_WRITE_iCCP_SUPPORTED
 859 #  ifndef PNG_iCCP_SUPPORTED
 860 #    define PNG_iCCP_SUPPORTED
 861 #  endif
 862 #endif
 863 #ifndef PNG_NO_WRITE_iTXt
 864 #  ifndef PNG_WRITE_iTXt_SUPPORTED
 865 #    define PNG_WRITE_iTXt_SUPPORTED
 866 #  endif
 867 #  ifndef PNG_iTXt_SUPPORTED
 868 #    define PNG_iTXt_SUPPORTED
 869 #  endif
 870 #endif
 871 #ifndef PNG_NO_WRITE_oFFs
 872 #  define PNG_WRITE_oFFs_SUPPORTED
 873 #  ifndef PNG_oFFs_SUPPORTED
 874 #    define PNG_oFFs_SUPPORTED
 875 #  endif
 876 #endif
 877 #ifndef PNG_NO_WRITE_pCAL
 878 #  define PNG_WRITE_pCAL_SUPPORTED
 879 #  ifndef PNG_pCAL_SUPPORTED
 880 #    define PNG_pCAL_SUPPORTED
 881 #  endif
 882 #endif
 883 #ifndef PNG_NO_WRITE_sCAL
 884 #  define PNG_WRITE_sCAL_SUPPORTED
 885 #  ifndef PNG_sCAL_SUPPORTED
 886 #    define PNG_sCAL_SUPPORTED
 887 #  endif
 888 #endif
 889 #ifndef PNG_NO_WRITE_pHYs
 890 #  define PNG_WRITE_pHYs_SUPPORTED
 891 #  ifndef PNG_pHYs_SUPPORTED
 892 #    define PNG_pHYs_SUPPORTED
 893 #  endif
 894 #endif
 895 #ifndef PNG_NO_WRITE_sBIT
 896 #  define PNG_WRITE_sBIT_SUPPORTED
 897 #  ifndef PNG_sBIT_SUPPORTED
 898 #    define PNG_sBIT_SUPPORTED
 899 #  endif
 900 #endif
 901 #ifndef PNG_NO_WRITE_sPLT
 902 #  define PNG_WRITE_sPLT_SUPPORTED
 903 #  ifndef PNG_sPLT_SUPPORTED
 904 #    define PNG_sPLT_SUPPORTED
 905 #  endif
 906 #endif
 907 #ifndef PNG_NO_WRITE_sRGB
 908 #  define PNG_WRITE_sRGB_SUPPORTED
 909 #  ifndef PNG_sRGB_SUPPORTED
 910 #    define PNG_sRGB_SUPPORTED
 911 #  endif
 912 #endif
 913 #ifndef PNG_NO_WRITE_tEXt
 914 #  define PNG_WRITE_tEXt_SUPPORTED
 915 #  ifndef PNG_tEXt_SUPPORTED
 916 #    define PNG_tEXt_SUPPORTED
 917 #  endif
 918 #endif
 919 #ifndef PNG_NO_WRITE_tIME
 920 #  define PNG_WRITE_tIME_SUPPORTED
 921 #  ifndef PNG_tIME_SUPPORTED
 922 #    define PNG_tIME_SUPPORTED
 923 #  endif
 924 #endif
 925 #ifndef PNG_NO_WRITE_tRNS
 926 #  define PNG_WRITE_tRNS_SUPPORTED
 927 #  ifndef PNG_tRNS_SUPPORTED
 928 #    define PNG_tRNS_SUPPORTED
 929 #  endif
 930 #endif
 931 #ifndef PNG_NO_WRITE_zTXt
 932 #  define PNG_WRITE_zTXt_SUPPORTED
 933 #  ifndef PNG_zTXt_SUPPORTED
 934 #    define PNG_zTXt_SUPPORTED
 935 #  endif
 936 #endif
 937 #ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS
 938 #  define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
 939 #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
 940 #    define PNG_UNKNOWN_CHUNKS_SUPPORTED
 941 #  endif
 942 #  ifndef PNG_NO_HANDLE_AS_UNKNOWN
 943 #     ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
 944 #       define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
 945 #     endif
 946 #  endif
 947 #endif
 948 #if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
 949     defined(PNG_WRITE_zTXt_SUPPORTED)
 950 #  define PNG_WRITE_TEXT_SUPPORTED
 951 #  ifndef PNG_TEXT_SUPPORTED
 952 #    define PNG_TEXT_SUPPORTED
 953 #  endif
 954 #endif
 955
 956 #endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */
 957
 958 /* Turn this off to disable png_read_png() and
 959  * png_write_png() and leave the row_pointers member
 960  * out of the info structure.
 961  */
 962 #ifndef PNG_NO_INFO_IMAGE
 963 #  define PNG_INFO_IMAGE_SUPPORTED
 964 #endif
 965
 966 /* need the time information for reading tIME chunks */
 967 #if defined(PNG_tIME_SUPPORTED)
 968 #  if !defined(_WIN32_WCE)
 969      /* "time.h" functions are not supported on WindowsCE */
 970 #    include <time.h>
 971 #  endif
 972 #endif
 973
 974 /* Some typedefs to get us started.  These should be safe on most of the
 975  * common platforms.  The typedefs should be at least as large as the
 976  * numbers suggest (a png_uint_32 must be at least 32 bits long), but they
 977  * don't have to be exactly that size.  Some compilers dislike passing
 978  * unsigned shorts as function parameters, so you may be better off using
 979  * unsigned int for png_uint_16.  Likewise, for 64-bit systems, you may
 980  * want to have unsigned int for png_uint_32 instead of unsigned long.
 981  */
 982
 983 typedef unsigned long png_uint_32;
 984 typedef long png_int_32;
 985 typedef unsigned short png_uint_16;
 986 typedef short png_int_16;
 987 typedef unsigned char png_byte;
 988
 989 /* This is usually size_t.  It is typedef'ed just in case you need it to
 990    change (I'm not sure if you will or not, so I thought I'd be safe) */
 991 typedef size_t png_size_t;
 992
 993 /* The following is needed for medium model support.  It cannot be in the
 994  * PNG_INTERNAL section.  Needs modification for other compilers besides
 995  * MSC.  Model independent support declares all arrays and pointers to be
 996  * large using the far keyword.  The zlib version used must also support
 997  * model independent data.  As of version zlib 1.0.4, the necessary changes
 998  * have been made in zlib.  The USE_FAR_KEYWORD define triggers other
 999  * changes that are needed. (Tim Wegner)
1000  */
1001
1002 /* Separate compiler dependencies (problem here is that zlib.h always
1003    defines FAR. (SJT) */
1004 #ifdef __BORLANDC__
1005 #  if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)
1006 #    define LDATA 1
1007 #  else
1008 #    define LDATA 0
1009 #  endif
1010    /* GRR:  why is Cygwin in here?  Cygwin is not Borland C... */
1011 #  if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)
1012 #    define PNG_MAX_MALLOC_64K
1013 #    if (LDATA != 1)
1014 #      ifndef FAR
1015 #        define FAR __far
1016 #      endif
1017 #      define USE_FAR_KEYWORD
1018 #    endif   /* LDATA != 1 */
1019      /* Possibly useful for moving data out of default segment.
1020       * Uncomment it if you want. Could also define FARDATA as
1021       * const if your compiler supports it. (SJT)
1022 #    define FARDATA FAR
1023       */
1024 #  endif  /* __WIN32__, __FLAT__, __CYGWIN__ */
1025 #endif   /* __BORLANDC__ */
1026
1027
1028 /* Suggest testing for specific compiler first before testing for
1029  * FAR.  The Watcom compiler defines both __MEDIUM__ and M_I86MM,
1030  * making reliance oncertain keywords suspect. (SJT)
1031  */
1032
1033 /* MSC Medium model */
1034 #if defined(FAR)
1035 #  if defined(M_I86MM)
1036 #    define USE_FAR_KEYWORD
1037 #    define FARDATA FAR
1038 #    include <dos.h>
1039 #  endif
1040 #endif
1041
1042 /* SJT: default case */
1043 #ifndef FAR
1044 #  define FAR
1045 #endif
1046
1047 /* At this point FAR is always defined */
1048 #ifndef FARDATA
1049 #  define FARDATA
1050 #endif
1051
1052 /* Typedef for floating-point numbers that are converted
1053    to fixed-point with a multiple of 100,000, e.g., int_gamma */
1054 typedef png_int_32 png_fixed_point;
1055
1056 /* Add typedefs for pointers */
1057 typedef void            FAR * png_voidp;
1058 typedef png_byte        FAR * png_bytep;
1059 typedef png_uint_32     FAR * png_uint_32p;
1060 typedef png_int_32      FAR * png_int_32p;
1061 typedef png_uint_16     FAR * png_uint_16p;
1062 typedef png_int_16      FAR * png_int_16p;
1063 typedef PNG_CONST char  FAR * png_const_charp;
1064 typedef char            FAR * png_charp;
1065 typedef png_fixed_point FAR * png_fixed_point_p;
1066
1067 #ifndef PNG_NO_STDIO
1068 #if defined(_WIN32_WCE)
1069 typedef HANDLE                png_FILE_p;
1070 #else
1071 typedef FILE                * png_FILE_p;
1072 #endif
1073 #endif
1074
1075 #ifdef PNG_FLOATING_POINT_SUPPORTED
1076 typedef double          FAR * png_doublep;
1077 #endif
1078
1079 /* Pointers to pointers; i.e. arrays */
1080 typedef png_byte        FAR * FAR * png_bytepp;
1081 typedef png_uint_32     FAR * FAR * png_uint_32pp;
1082 typedef png_int_32      FAR * FAR * png_int_32pp;
1083 typedef png_uint_16     FAR * FAR * png_uint_16pp;
1084 typedef png_int_16      FAR * FAR * png_int_16pp;
1085 typedef PNG_CONST char  FAR * FAR * png_const_charpp;
1086 typedef char            FAR * FAR * png_charpp;
1087 typedef png_fixed_point FAR * FAR * png_fixed_point_pp;
1088 #ifdef PNG_FLOATING_POINT_SUPPORTED
1089 typedef double          FAR * FAR * png_doublepp;
1090 #endif
1091
1092 /* Pointers to pointers to pointers; i.e., pointer to array */
1093 typedef char            FAR * FAR * FAR * png_charppp;
1094
1095 /* libpng typedefs for types in zlib. If zlib changes
1096  * or another compression library is used, then change these.
1097  * Eliminates need to change all the source files.
1098  */
1099 typedef charf *         png_zcharp;
1100 typedef charf * FAR *   png_zcharpp;
1101 typedef z_stream FAR *  png_zstreamp;
1102
1103 /*
1104  * Define PNG_BUILD_DLL if the module being built is a Windows
1105  * LIBPNG DLL.
1106  *
1107  * Define PNG_USE_DLL if you want to *link* to the Windows LIBPNG DLL.
1108  * It is equivalent to Microsoft predefined macro _DLL that is
1109  * automatically defined when you compile using the share
1110  * version of the CRT (C Run-Time library)
1111  *
1112  * The cygwin mods make this behavior a little different:
1113  * Define PNG_BUILD_DLL if you are building a dll for use with cygwin
1114  * Define PNG_STATIC if you are building a static library for use with cygwin,
1115  *   -or- if you are building an application that you want to link to the
1116  *   static library.
1117  * PNG_USE_DLL is defined by default (no user action needed) unless one of
1118  *   the other flags is defined.
1119  */
1120
1121 #if !defined(PNG_DLL) && (defined(PNG_BUILD_DLL) || defined(PNG_USE_DLL))
1122 #  define PNG_DLL
1123 #endif
1124 /* If CYGWIN, then disallow GLOBAL ARRAYS unless building a static lib.
1125  * When building a static lib, default to no GLOBAL ARRAYS, but allow
1126  * command-line override
1127  */
1128 #if defined(__CYGWIN__)
1129 #  if !defined(PNG_STATIC)
1130 #    if defined(PNG_USE_GLOBAL_ARRAYS)
1131 #      undef PNG_USE_GLOBAL_ARRAYS
1132 #    endif
1133 #    if !defined(PNG_USE_LOCAL_ARRAYS)
1134 #      define PNG_USE_LOCAL_ARRAYS
1135 #    endif
1136 #  else
1137 #    if defined(PNG_USE_LOCAL_ARRAYS) || defined(PNG_NO_GLOBAL_ARRAYS)
1138 #      if defined(PNG_USE_GLOBAL_ARRAYS)
1139 #        undef PNG_USE_GLOBAL_ARRAYS
1140 #      endif
1141 #    endif
1142 #  endif
1143 #  if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1144 #    define PNG_USE_LOCAL_ARRAYS
1145 #  endif
1146 #endif
1147
1148 /* Do not use global arrays (helps with building DLL's)
1149  * They are no longer used in libpng itself, since version 1.0.5c,
1150  * but might be required for some pre-1.0.5c applications.
1151  */
1152 #if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1153 #  if defined(PNG_NO_GLOBAL_ARRAYS) || (defined(__GNUC__) && defined(PNG_DLL))
1154 #    define PNG_USE_LOCAL_ARRAYS
1155 #  else
1156 #    define PNG_USE_GLOBAL_ARRAYS
1157 #  endif
1158 #endif
1159
1160 #if defined(__CYGWIN__)
1161 #  undef PNGAPI
1162 #  define PNGAPI __cdecl
1163 #  undef PNG_IMPEXP
1164 #  define PNG_IMPEXP
1165 #endif
1166
1167 /* If you define PNGAPI, e.g., with compiler option "-DPNGAPI=__stdcall",
1168  * you may get warnings regarding the linkage of png_zalloc and png_zfree.
1169  * Don't ignore those warnings; you must also reset the default calling
1170  * convention in your compiler to match your PNGAPI, and you must build
1171  * zlib and your applications the same way you build libpng.
1172  */
1173
1174 #ifndef PNGAPI
1175
1176 #if defined(__MINGW32__) && !defined(PNG_MODULEDEF)
1177 #  ifndef PNG_NO_MODULEDEF
1178 #    define PNG_NO_MODULEDEF
1179 #  endif
1180 #endif
1181
1182 #if !defined(PNG_IMPEXP) && defined(PNG_BUILD_DLL) && !defined(PNG_NO_MODULEDEF)
1183 #  define PNG_IMPEXP
1184 #endif
1185
1186 #if defined(PNG_DLL) || defined(_DLL) || defined(__DLL__ ) || \
1187     (( defined(_Windows) || defined(_WINDOWS) || \
1188        defined(WIN32) || defined(_WIN32) || defined(__WIN32__) ))
1189
1190 #  if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
1191 #    define PNGAPI __cdecl
1192 #  else
1193 #    define PNGAPI _cdecl
1194 #  endif
1195
1196 #  if !defined(PNG_IMPEXP) && (!defined(PNG_DLL) || \
1197        0 /* WINCOMPILER_WITH_NO_SUPPORT_FOR_DECLIMPEXP */)
1198 #     define PNG_IMPEXP
1199 #  endif
1200
1201 #  if !defined(PNG_IMPEXP)
1202
1203 #     define PNG_EXPORT_TYPE1(type,symbol)  PNG_IMPEXP type PNGAPI symbol
1204 #     define PNG_EXPORT_TYPE2(type,symbol)  type PNG_IMPEXP PNGAPI symbol
1205
1206       /* Borland/Microsoft */
1207 #     if defined(_MSC_VER) || defined(__BORLANDC__)
1208 #        if (_MSC_VER >= 800) || (__BORLANDC__ >= 0x500)
1209 #           define PNG_EXPORT PNG_EXPORT_TYPE1
1210 #        else
1211 #           define PNG_EXPORT PNG_EXPORT_TYPE2
1212 #           if defined(PNG_BUILD_DLL)
1213 #              define PNG_IMPEXP __export
1214 #           else
1215 #              define PNG_IMPEXP /*__import */ /* doesn't exist AFAIK in
1216                                                  VC++ */
1217 #           endif                             /* Exists in Borland C++ for
1218                                                  C++ classes (== huge) */
1219 #        endif
1220 #     endif
1221
1222 #     if !defined(PNG_IMPEXP)
1223 #        if defined(PNG_BUILD_DLL)
1224 #           define PNG_IMPEXP __declspec(dllexport)
1225 #        else
1226 #           define PNG_IMPEXP __declspec(dllimport)
1227 #        endif
1228 #     endif
1229 #  endif  /* PNG_IMPEXP */
1230 #else /* !(DLL || non-cygwin WINDOWS) */
1231 #    if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
1232 #      define PNGAPI _System
1233 #      define PNG_IMPEXP
1234 #    else
1235 #      if 0 /* ... other platforms, with other meanings */
1236 #      else
1237 #        define PNGAPI
1238 #        define PNG_IMPEXP
1239 #      endif
1240 #    endif
1241 #endif
1242 #endif
1243
1244 #if defined(__VISAGECPP__)
1245 /* I don't compile with _System linkage, ever! */
1246 #  ifdef PNGAPI
1247 #    undef PNGAPI
1248 #  endif
1249 #  define PNGAPI _Optlink
1250 #  define PNG_IMPEXP
1251 #  define PNG_USE_LOCAL_ARRAYS
1252 #  ifdef PNG_USE_GLOBAL_ARRAYS
1253 #    undef PNG_USE_GLOBAL_ARRAYS
1254 #  endif
1255 extern const char png_libpng_ver[18];
1256 #endif
1257
1258 #ifndef PNGAPI
1259 #  define PNGAPI
1260 #endif
1261 #ifndef PNG_IMPEXP
1262 #  define PNG_IMPEXP
1263 #endif
1264
1265 #ifndef PNG_EXPORT
1266 #  define PNG_EXPORT(type,symbol) PNG_IMPEXP type PNGAPI symbol
1267 #endif
1268
1269 #ifdef PNG_USE_GLOBAL_ARRAYS
1270 #  ifndef PNG_EXPORT_VAR
1271 #    define PNG_EXPORT_VAR(type) extern PNG_IMPEXP type
1272 #  endif
1273 #endif
1274
1275 /* User may want to use these so they are not in PNG_INTERNAL. Any library
1276  * functions that are passed far data must be model independent.
1277  */
1278
1279 #ifndef PNG_ABORT
1280 #  define PNG_ABORT() abort()
1281 #endif
1282
1283 #ifdef PNG_SETJMP_SUPPORTED
1284 #  define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf)
1285 #else
1286 #  define png_jmpbuf(png_ptr) \
1287    (LIBPNG_WAS_COMPILED_WITH__PNG_SETJMP_NOT_SUPPORTED)
1288 #endif
1289
1290 #if defined(USE_FAR_KEYWORD)  /* memory model independent fns */
1291 /* use this to make far-to-near assignments */
1292 #  define CHECK   1
1293 #  define NOCHECK 0
1294 #  define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK))
1295 #  define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK))
1296 #  define png_strcpy _fstrcpy
1297 #  define png_strlen _fstrlen
1298 #  define png_memcmp _fmemcmp      /* SJT: added */
1299 #  define png_memcpy _fmemcpy
1300 #  define png_memset _fmemset
1301 #else /* use the usual functions */
1302 #  define CVT_PTR(ptr)         (ptr)
1303 #  define CVT_PTR_NOCHECK(ptr) (ptr)
1304 #  define png_strcpy strcpy
1305 #  define png_strlen strlen
1306 #  define png_memcmp memcmp     /* SJT: added */
1307 #  define png_memcpy memcpy
1308 #  define png_memset memset
1309 #endif
1310 /* End of memory model independent support */
1311
1312 /* Just a little check that someone hasn't tried to define something
1313  * contradictory.
1314  */
1315 #if (PNG_ZBUF_SIZE > 65536) && defined(PNG_MAX_MALLOC_64K)
1316 #  undef PNG_ZBUF_SIZE
1317 #  define PNG_ZBUF_SIZE 65536
1318 #endif
1319
1320 #ifdef PNG_READ_SUPPORTED
1321 /* Prior to libpng-1.0.9, this block was in pngasmrd.h */
1322 #if defined(PNG_INTERNAL)
1323
1324 /* These are the default thresholds before the MMX code kicks in; if either
1325  * rowbytes or bitdepth is below the threshold, plain C code is used.  These
1326  * can be overridden at runtime via the png_set_mmx_thresholds() call in
1327  * libpng 1.2.0 and later.  The values below were chosen by Intel.
1328  */
1329
1330 #ifndef PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT
1331 #  define PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT  128  /*  >=  */
1332 #endif
1333 #ifndef PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT
1334 #  define PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT  9    /*  >=  */
1335 #endif
1336
1337 /* Set this in the makefile for VC++ on Pentium, not here. */
1338 /* Platform must be Pentium.  Makefile must assemble and load pngvcrd.c .
1339  * MMX will be detected at run time and used if present.
1340  */
1341 #ifdef PNG_USE_PNGVCRD
1342 #  define PNG_HAVE_ASSEMBLER_COMBINE_ROW
1343 #  define PNG_HAVE_ASSEMBLER_READ_INTERLACE
1344 #  define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
1345 #endif
1346
1347 /* Set this in the makefile for gcc/as on Pentium, not here. */
1348 /* Platform must be Pentium.  Makefile must assemble and load pnggccrd.c .
1349  * MMX will be detected at run time and used if present.
1350  */
1351 #ifdef PNG_USE_PNGGCCRD
1352 #  define PNG_HAVE_ASSEMBLER_COMBINE_ROW
1353 #  define PNG_HAVE_ASSEMBLER_READ_INTERLACE
1354 #  define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
1355 #endif
1356 /* - see pnggccrd.c for info about what is currently enabled */
1357
1358 #endif /* PNG_INTERNAL */
1359 #endif /* PNG_READ_SUPPORTED */
1360
1361 #endif /* PNGCONF_H */
1362