src/png/pngconf.h

   1
   2 /* pngconf.h - machine configurable file for libpng
   3  *
   4  * libpng version 1.2.7 - September 12, 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 #ifdef PNG_USER_CONFIG
  21 #include "pngusr.h"
  22 #endif
  23
  24 /* This is the size of the compression buffer, and thus the size of
  25  * an IDAT chunk.  Make this whatever size you feel is best for your
  26  * machine.  One of these will be allocated per png_struct.  When this
  27  * is full, it writes the data to the disk, and does some other
  28  * calculations.  Making this an extremely small size will slow
  29  * the library down, but you may want to experiment to determine
  30  * where it becomes significant, if you are concerned with memory
  31  * usage.  Note that zlib allocates at least 32Kb also.  For readers,
  32  * this describes the size of the buffer available to read the data in.
  33  * Unless this gets smaller than the size of a row (compressed),
  34  * it should not make much difference how big this is.
  35  */
  36
  37 #ifndef PNG_ZBUF_SIZE
  38 #  define PNG_ZBUF_SIZE 8192
  39 #endif
  40
  41 /* Enable if you want a write-only libpng */
  42
  43 #ifndef PNG_NO_READ_SUPPORTED
  44 #  define PNG_READ_SUPPORTED
  45 #endif
  46
  47 /* Enable if you want a read-only libpng */
  48
  49 #ifndef PNG_NO_WRITE_SUPPORTED
  50 #  define PNG_WRITE_SUPPORTED
  51 #endif
  52
  53 /* Enabled by default in 1.2.0.  You can disable this if you don't need to
  54    support PNGs that are embedded in MNG datastreams */
  55 #if !defined(PNG_1_0_X) && !defined(PNG_NO_MNG_FEATURES)
  56 #  ifndef PNG_MNG_FEATURES_SUPPORTED
  57 #    define PNG_MNG_FEATURES_SUPPORTED
  58 #  endif
  59 #endif
  60
  61 #ifndef PNG_NO_FLOATING_POINT_SUPPORTED
  62 #  ifndef PNG_FLOATING_POINT_SUPPORTED
  63 #    define PNG_FLOATING_POINT_SUPPORTED
  64 #  endif
  65 #endif
  66
  67 /* If you are running on a machine where you cannot allocate more
  68  * than 64K of memory at once, uncomment this.  While libpng will not
  69  * normally need that much memory in a chunk (unless you load up a very
  70  * large file), zlib needs to know how big of a chunk it can use, and
  71  * libpng thus makes sure to check any memory allocation to verify it
  72  * will fit into memory.
  73 #define PNG_MAX_MALLOC_64K
  74  */
  75 #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
  76 #  define PNG_MAX_MALLOC_64K
  77 #endif
  78
  79 /* Special munging to support doing things the 'cygwin' way:
  80  * 'Normal' png-on-win32 defines/defaults:
  81  *   PNG_BUILD_DLL -- building dll
  82  *   PNG_USE_DLL   -- building an application, linking to dll
  83  *   (no define)   -- building static library, or building an
  84  *                    application and linking to the static lib
  85  * 'Cygwin' defines/defaults:
  86  *   PNG_BUILD_DLL -- (ignored) building the dll
  87  *   (no define)   -- (ignored) building an application, linking to the dll
  88  *   PNG_STATIC    -- (ignored) building the static lib, or building an
  89  *                    application that links to the static lib.
  90  *   ALL_STATIC    -- (ignored) building various static libs, or building an
  91  *                    application that links to the static libs.
  92  * Thus,
  93  * a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and
  94  * this bit of #ifdefs will define the 'correct' config variables based on
  95  * that. If a cygwin user *wants* to define 'PNG_USE_DLL' that's okay, but
  96  * unnecessary.
  97  *
  98  * Also, the precedence order is:
  99  *   ALL_STATIC (since we can't #undef something outside our namespace)
 100  *   PNG_BUILD_DLL
 101  *   PNG_STATIC
 102  *   (nothing) == PNG_USE_DLL
 103  *
 104  * CYGWIN (2002-01-20): The preceding is now obsolete. With the advent
 105  *   of auto-import in binutils, we no longer need to worry about
 106  *   __declspec(dllexport) / __declspec(dllimport) and friends.  Therefore,
 107  *   we don't need to worry about PNG_STATIC or ALL_STATIC when it comes
 108  *   to __declspec() stuff.  However, we DO need to worry about
 109  *   PNG_BUILD_DLL and PNG_STATIC because those change some defaults
 110  *   such as CONSOLE_IO and whether GLOBAL_ARRAYS are allowed.
 111  */
 112 #if defined(__CYGWIN__)
 113 #  if defined(ALL_STATIC)
 114 #    if defined(PNG_BUILD_DLL)
 115 #      undef PNG_BUILD_DLL
 116 #    endif
 117 #    if defined(PNG_USE_DLL)
 118 #      undef PNG_USE_DLL
 119 #    endif
 120 #    if defined(PNG_DLL)
 121 #      undef PNG_DLL
 122 #    endif
 123 #    if !defined(PNG_STATIC)
 124 #      define PNG_STATIC
 125 #    endif
 126 #  else
 127 #    if defined (PNG_BUILD_DLL)
 128 #      if defined(PNG_STATIC)
 129 #        undef PNG_STATIC
 130 #      endif
 131 #      if defined(PNG_USE_DLL)
 132 #        undef PNG_USE_DLL
 133 #      endif
 134 #      if !defined(PNG_DLL)
 135 #        define PNG_DLL
 136 #      endif
 137 #    else
 138 #      if defined(PNG_STATIC)
 139 #        if defined(PNG_USE_DLL)
 140 #          undef PNG_USE_DLL
 141 #        endif
 142 #        if defined(PNG_DLL)
 143 #          undef PNG_DLL
 144 #        endif
 145 #      else
 146 #        if !defined(PNG_USE_DLL)
 147 #          define PNG_USE_DLL
 148 #        endif
 149 #        if !defined(PNG_DLL)
 150 #          define PNG_DLL
 151 #        endif
 152 #      endif
 153 #    endif
 154 #  endif
 155 #endif
 156
 157 /* This protects us against compilers that run on a windowing system
 158  * and thus don't have or would rather us not use the stdio types:
 159  * stdin, stdout, and stderr.  The only one currently used is stderr
 160  * in png_error() and png_warning().  #defining PNG_NO_CONSOLE_IO will
 161  * prevent these from being compiled and used. #defining PNG_NO_STDIO
 162  * will also prevent these, plus will prevent the entire set of stdio
 163  * macros and functions (FILE *, printf, etc.) from being compiled and used,
 164  * unless (PNG_DEBUG > 0) has been #defined.
 165  *
 166  * #define PNG_NO_CONSOLE_IO
 167  * #define PNG_NO_STDIO
 168  */
 169
 170 #if defined(_WIN32_WCE)
 171 #  include <windows.h>
 172    /* Console I/O functions are not supported on WindowsCE */
 173 #  define PNG_NO_CONSOLE_IO
 174 #  ifdef PNG_DEBUG
 175 #    undef PNG_DEBUG
 176 #  endif
 177 #endif
 178
 179 #ifdef PNG_BUILD_DLL
 180 #  ifndef PNG_CONSOLE_IO_SUPPORTED
 181 #    ifndef PNG_NO_CONSOLE_IO
 182 #      define PNG_NO_CONSOLE_IO
 183 #    endif
 184 #  endif
 185 #endif
 186
 187 #  ifdef PNG_NO_STDIO
 188 #    ifndef PNG_NO_CONSOLE_IO
 189 #      define PNG_NO_CONSOLE_IO
 190 #    endif
 191 #    ifdef PNG_DEBUG
 192 #      if (PNG_DEBUG > 0)
 193 #        include <stdio.h>
 194 #      endif
 195 #    endif
 196 #  else
 197 #    if !defined(_WIN32_WCE)
 198 /* "stdio.h" functions are not supported on WindowsCE */
 199 #      include <stdio.h>
 200 #    endif
 201 #  endif
 202
 203 /* This macro protects us against machines that don't have function
 204  * prototypes (ie K&R style headers).  If your compiler does not handle
 205  * function prototypes, define this macro and use the included ansi2knr.
 206  * I've always been able to use _NO_PROTO as the indicator, but you may
 207  * need to drag the empty declaration out in front of here, or change the
 208  * ifdef to suit your own needs.
 209  */
 210 #ifndef PNGARG
 211
 212 #ifdef OF /* zlib prototype munger */
 213 #  define PNGARG(arglist) OF(arglist)
 214 #else
 215
 216 #ifdef _NO_PROTO
 217 #  define PNGARG(arglist) ()
 218 #  ifndef PNG_TYPECAST_NULL
 219 #     define PNG_TYPECAST_NULL
 220 #  endif
 221 #else
 222 #  define PNGARG(arglist) arglist
 223 #endif /* _NO_PROTO */
 224
 225 #endif /* OF */
 226
 227 #endif /* PNGARG */
 228
 229 /* Try to determine if we are compiling on a Mac.  Note that testing for
 230  * just __MWERKS__ is not good enough, because the Codewarrior is now used
 231  * on non-Mac platforms.
 232  */
 233 #ifndef MACOS
 234 #  if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
 235       defined(THINK_C) || (defined(__SC__) && !defined(__DMC__))|| defined(TARGET_OS_MAC)
 236 #    define MACOS
 237 #  endif
 238 #endif
 239
 240 /* enough people need this for various reasons to include it here */
 241 #if !defined(MACOS) && !defined(RISCOS) && !defined(_WIN32_WCE)
 242 #  include <sys/types.h>
 243 #endif
 244
 245 #if !defined(PNG_SETJMP_NOT_SUPPORTED) && !defined(PNG_NO_SETJMP_SUPPORTED)
 246 #  define PNG_SETJMP_SUPPORTED
 247 #endif
 248
 249 #ifdef PNG_SETJMP_SUPPORTED
 250 /* This is an attempt to force a single setjmp behaviour on Linux.  If
 251  * the X config stuff didn't define _BSD_SOURCE we wouldn't need this.
 252  */
 253
 254 #  ifdef __linux__
 255 #    ifdef _BSD_SOURCE
 256 #      define PNG_SAVE_BSD_SOURCE
 257 #      undef _BSD_SOURCE
 258 #    endif
 259 #    ifdef _SETJMP_H
 260      /* If you encounter a compiler error here, see the explanation
 261       * near the end of INSTALL.
 262       */
 263          __png.h__ already includes setjmp.h;
 264          __dont__ include it again.;
 265 #    endif
 266 #  endif /* __linux__ */
 267
 268    /* include setjmp.h for error handling */
 269 #  include <setjmp.h>
 270
 271 #  ifdef __linux__
 272 #    ifdef PNG_SAVE_BSD_SOURCE
 273 #      define _BSD_SOURCE
 274 #      undef PNG_SAVE_BSD_SOURCE
 275 #    endif
 276 #  endif /* __linux__ */
 277 #endif /* PNG_SETJMP_SUPPORTED */
 278
 279 #ifdef BSD
 280 #  include <strings.h>
 281 #else
 282 #  include <string.h>
 283 #endif
 284
 285 /* Other defines for things like memory and the like can go here.  */
 286 #ifdef PNG_INTERNAL
 287
 288 #include <stdlib.h>
 289
 290 /* The functions exported by PNG_EXTERN are PNG_INTERNAL functions, which
 291  * aren't usually used outside the library (as far as I know), so it is
 292  * debatable if they should be exported at all.  In the future, when it is
 293  * possible to have run-time registry of chunk-handling functions, some of
 294  * these will be made available again.
 295 #define PNG_EXTERN extern
 296  */
 297 #define PNG_EXTERN
 298
 299 /* Other defines specific to compilers can go here.  Try to keep
 300  * them inside an appropriate ifdef/endif pair for portability.
 301  */
 302
 303 #if defined(PNG_FLOATING_POINT_SUPPORTED)
 304 #  if defined(MACOS)
 305      /* We need to check that <math.h> hasn't already been included earlier
 306       * as it seems it doesn't agree with <fp.h>, yet we should really use
 307       * <fp.h> if possible.
 308       */
 309 #    if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__)
 310 #      include <fp.h>
 311 #    endif
 312 #  else
 313 #    include <math.h>
 314 #  endif
 315 #  if defined(_AMIGA) && defined(__SASC) && defined(_M68881)
 316      /* Amiga SAS/C: We must include builtin FPU functions when compiling using
 317       * MATH=68881
 318       */
 319 #    include <m68881.h>
 320 #  endif
 321 #endif
 322
 323 /* Codewarrior on NT has linking problems without this. */
 324 #if (defined(__MWERKS__) && defined(WIN32)) || defined(__STDC__)
 325 #  define PNG_ALWAYS_EXTERN
 326 #endif
 327
 328 /* This provides the non-ANSI (far) memory allocation routines. */
 329 #if defined(__TURBOC__) && defined(__MSDOS__)
 330 #  include <mem.h>
 331 #  include <alloc.h>
 332 #endif
 333
 334 /* I have no idea why is this necessary... */
 335 #if defined(_MSC_VER) && (defined(WIN32) || defined(_Windows) || \
 336     defined(_WINDOWS) || defined(_WIN32) || defined(__WIN32__))
 337 #  include <malloc.h>
 338 #endif
 339
 340 /* This controls how fine the dithering gets.  As this allocates
 341  * a largish chunk of memory (32K), those who are not as concerned
 342  * with dithering quality can decrease some or all of these.
 343  */
 344 #ifndef PNG_DITHER_RED_BITS
 345 #  define PNG_DITHER_RED_BITS 5
 346 #endif
 347 #ifndef PNG_DITHER_GREEN_BITS
 348 #  define PNG_DITHER_GREEN_BITS 5
 349 #endif
 350 #ifndef PNG_DITHER_BLUE_BITS
 351 #  define PNG_DITHER_BLUE_BITS 5
 352 #endif
 353
 354 /* This controls how fine the gamma correction becomes when you
 355  * are only interested in 8 bits anyway.  Increasing this value
 356  * results in more memory being used, and more pow() functions
 357  * being called to fill in the gamma tables.  Don't set this value
 358  * less then 8, and even that may not work (I haven't tested it).
 359  */
 360
 361 #ifndef PNG_MAX_GAMMA_8
 362 #  define PNG_MAX_GAMMA_8 11
 363 #endif
 364
 365 /* This controls how much a difference in gamma we can tolerate before
 366  * we actually start doing gamma conversion.
 367  */
 368 #ifndef PNG_GAMMA_THRESHOLD
 369 #  define PNG_GAMMA_THRESHOLD 0.05
 370 #endif
 371
 372 #endif /* PNG_INTERNAL */
 373
 374 /* The following uses const char * instead of char * for error
 375  * and warning message functions, so some compilers won't complain.
 376  * If you do not want to use const, define PNG_NO_CONST here.
 377  */
 378
 379 #ifndef PNG_NO_CONST
 380 #  define PNG_CONST const
 381 #else
 382 #  define PNG_CONST
 383 #endif
 384
 385 /* The following defines give you the ability to remove code from the
 386  * library that you will not be using.  I wish I could figure out how to
 387  * automate this, but I can't do that without making it seriously hard
 388  * on the users.  So if you are not using an ability, change the #define
 389  * to and #undef, and that part of the library will not be compiled.  If
 390  * your linker can't find a function, you may want to make sure the
 391  * ability is defined here.  Some of these depend upon some others being
 392  * defined.  I haven't figured out all the interactions here, so you may
 393  * have to experiment awhile to get everything to compile.  If you are
 394  * creating or using a shared library, you probably shouldn't touch this,
 395  * as it will affect the size of the structures, and this will cause bad
 396  * things to happen if the library and/or application ever change.
 397  */
 398
 399 /* Any features you will not be using can be undef'ed here */
 400
 401 /* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user
 402  * to turn it off with "*TRANSFORMS_NOT_SUPPORTED" or *PNG_NO_*_TRANSFORMS
 403  * on the compile line, then pick and choose which ones to define without
 404  * having to edit this file. It is safe to use the *TRANSFORMS_NOT_SUPPORTED
 405  * if you only want to have a png-compliant reader/writer but don't need
 406  * any of the extra transformations.  This saves about 80 kbytes in a
 407  * typical installation of the library. (PNG_NO_* form added in version
 408  * 1.0.1c, for consistency)
 409  */
 410
 411 /* The size of the png_text structure changed in libpng-1.0.6 when
 412  * iTXt is supported.  It is turned off by default, to support old apps
 413  * that malloc the png_text structure instead of calling png_set_text()
 414  * and letting libpng malloc it.  It will be turned on by default in
 415  * libpng-1.3.0.
 416  */
 417
 418 #ifndef PNG_iTXt_SUPPORTED
 419 #  if !defined(PNG_READ_iTXt_SUPPORTED) && !defined(PNG_NO_READ_iTXt)
 420 #    define PNG_NO_READ_iTXt
 421 #  endif
 422 #  if !defined(PNG_WRITE_iTXt_SUPPORTED) && !defined(PNG_NO_WRITE_iTXt)
 423 #    define PNG_NO_WRITE_iTXt
 424 #  endif
 425 #endif
 426
 427 /* The following support, added after version 1.0.0, can be turned off here en
 428  * masse by defining PNG_LEGACY_SUPPORTED in case you need binary compatibility
 429  * with old applications that require the length of png_struct and png_info
 430  * to remain unchanged.
 431  */
 432
 433 #ifdef PNG_LEGACY_SUPPORTED
 434 #  define PNG_NO_FREE_ME
 435 #  define PNG_NO_READ_UNKNOWN_CHUNKS
 436 #  define PNG_NO_WRITE_UNKNOWN_CHUNKS
 437 #  define PNG_NO_READ_USER_CHUNKS
 438 #  define PNG_NO_READ_iCCP
 439 #  define PNG_NO_WRITE_iCCP
 440 #  define PNG_NO_READ_iTXt
 441 #  define PNG_NO_WRITE_iTXt
 442 #  define PNG_NO_READ_sCAL
 443 #  define PNG_NO_WRITE_sCAL
 444 #  define PNG_NO_READ_sPLT
 445 #  define PNG_NO_WRITE_sPLT
 446 #  define PNG_NO_INFO_IMAGE
 447 #  define PNG_NO_READ_RGB_TO_GRAY
 448 #  define PNG_NO_READ_USER_TRANSFORM
 449 #  define PNG_NO_WRITE_USER_TRANSFORM
 450 #  define PNG_NO_USER_MEM
 451 #  define PNG_NO_READ_EMPTY_PLTE
 452 #  define PNG_NO_MNG_FEATURES
 453 #  define PNG_NO_FIXED_POINT_SUPPORTED
 454 #endif
 455
 456 /* Ignore attempt to turn off both floating and fixed point support */
 457 #if !defined(PNG_FLOATING_POINT_SUPPORTED) || \
 458     !defined(PNG_NO_FIXED_POINT_SUPPORTED)
 459 #  define PNG_FIXED_POINT_SUPPORTED
 460 #endif
 461
 462 #ifndef PNG_NO_FREE_ME
 463 #  define PNG_FREE_ME_SUPPORTED
 464 #endif
 465
 466 #if defined(PNG_READ_SUPPORTED)
 467
 468 #if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \
 469       !defined(PNG_NO_READ_TRANSFORMS)
 470 #  define PNG_READ_TRANSFORMS_SUPPORTED
 471 #endif
 472
 473 #ifdef PNG_READ_TRANSFORMS_SUPPORTED
 474 #  ifndef PNG_NO_READ_EXPAND
 475 #    define PNG_READ_EXPAND_SUPPORTED
 476 #  endif
 477 #  ifndef PNG_NO_READ_SHIFT
 478 #    define PNG_READ_SHIFT_SUPPORTED
 479 #  endif
 480 #  ifndef PNG_NO_READ_PACK
 481 #    define PNG_READ_PACK_SUPPORTED
 482 #  endif
 483 #  ifndef PNG_NO_READ_BGR
 484 #    define PNG_READ_BGR_SUPPORTED
 485 #  endif
 486 #  ifndef PNG_NO_READ_SWAP
 487 #    define PNG_READ_SWAP_SUPPORTED
 488 #  endif
 489 #  ifndef PNG_NO_READ_PACKSWAP
 490 #    define PNG_READ_PACKSWAP_SUPPORTED
 491 #  endif
 492 #  ifndef PNG_NO_READ_INVERT
 493 #    define PNG_READ_INVERT_SUPPORTED
 494 #  endif
 495 #  ifndef PNG_NO_READ_DITHER
 496 #    define PNG_READ_DITHER_SUPPORTED
 497 #  endif
 498 #  ifndef PNG_NO_READ_BACKGROUND
 499 #    define PNG_READ_BACKGROUND_SUPPORTED
 500 #  endif
 501 #  ifndef PNG_NO_READ_16_TO_8
 502 #    define PNG_READ_16_TO_8_SUPPORTED
 503 #  endif
 504 #  ifndef PNG_NO_READ_FILLER
 505 #    define PNG_READ_FILLER_SUPPORTED
 506 #  endif
 507 #  ifndef PNG_NO_READ_GAMMA
 508 #    define PNG_READ_GAMMA_SUPPORTED
 509 #  endif
 510 #  ifndef PNG_NO_READ_GRAY_TO_RGB
 511 #    define PNG_READ_GRAY_TO_RGB_SUPPORTED
 512 #  endif
 513 #  ifndef PNG_NO_READ_SWAP_ALPHA
 514 #    define PNG_READ_SWAP_ALPHA_SUPPORTED
 515 #  endif
 516 #  ifndef PNG_NO_READ_INVERT_ALPHA
 517 #    define PNG_READ_INVERT_ALPHA_SUPPORTED
 518 #  endif
 519 #  ifndef PNG_NO_READ_STRIP_ALPHA
 520 #    define PNG_READ_STRIP_ALPHA_SUPPORTED
 521 #  endif
 522 #  ifndef PNG_NO_READ_USER_TRANSFORM
 523 #    define PNG_READ_USER_TRANSFORM_SUPPORTED
 524 #  endif
 525 #  ifndef PNG_NO_READ_RGB_TO_GRAY
 526 #    define PNG_READ_RGB_TO_GRAY_SUPPORTED
 527 #  endif
 528 #endif /* PNG_READ_TRANSFORMS_SUPPORTED */
 529
 530 #if !defined(PNG_NO_PROGRESSIVE_READ) && \
 531  !defined(PNG_PROGRESSIVE_READ_NOT_SUPPORTED)  /* if you don't do progressive */
 532 #  define PNG_PROGRESSIVE_READ_SUPPORTED     /* reading.  This is not talking */
 533 #endif                               /* about interlacing capability!  You'll */
 534               /* still have interlacing unless you change the following line: */
 535
 536 #define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */
 537
 538 #ifndef PNG_NO_READ_COMPOSITE_NODIV
 539 #  ifndef PNG_NO_READ_COMPOSITED_NODIV  /* libpng-1.0.x misspelling */
 540 #    define PNG_READ_COMPOSITE_NODIV_SUPPORTED   /* well tested on Intel, SGI */
 541 #  endif
 542 #endif
 543
 544 /* Deprecated, will be removed from version 2.0.0.
 545    Use PNG_MNG_FEATURES_SUPPORTED instead. */
 546 #ifndef PNG_NO_READ_EMPTY_PLTE
 547 #  define PNG_READ_EMPTY_PLTE_SUPPORTED
 548 #endif
 549
 550 #endif /* PNG_READ_SUPPORTED */
 551
 552 #if defined(PNG_WRITE_SUPPORTED)
 553
 554 # if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \
 555     !defined(PNG_NO_WRITE_TRANSFORMS)
 556 #  define PNG_WRITE_TRANSFORMS_SUPPORTED
 557 #endif
 558
 559 #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
 560 #  ifndef PNG_NO_WRITE_SHIFT
 561 #    define PNG_WRITE_SHIFT_SUPPORTED
 562 #  endif
 563 #  ifndef PNG_NO_WRITE_PACK
 564 #    define PNG_WRITE_PACK_SUPPORTED
 565 #  endif
 566 #  ifndef PNG_NO_WRITE_BGR
 567 #    define PNG_WRITE_BGR_SUPPORTED
 568 #  endif
 569 #  ifndef PNG_NO_WRITE_SWAP
 570 #    define PNG_WRITE_SWAP_SUPPORTED
 571 #  endif
 572 #  ifndef PNG_NO_WRITE_PACKSWAP
 573 #    define PNG_WRITE_PACKSWAP_SUPPORTED
 574 #  endif
 575 #  ifndef PNG_NO_WRITE_INVERT
 576 #    define PNG_WRITE_INVERT_SUPPORTED
 577 #  endif
 578 #  ifndef PNG_NO_WRITE_FILLER
 579 #    define PNG_WRITE_FILLER_SUPPORTED   /* same as WRITE_STRIP_ALPHA */
 580 #  endif
 581 #  ifndef PNG_NO_WRITE_SWAP_ALPHA
 582 #    define PNG_WRITE_SWAP_ALPHA_SUPPORTED
 583 #  endif
 584 #  ifndef PNG_NO_WRITE_INVERT_ALPHA
 585 #    define PNG_WRITE_INVERT_ALPHA_SUPPORTED
 586 #  endif
 587 #  ifndef PNG_NO_WRITE_USER_TRANSFORM
 588 #    define PNG_WRITE_USER_TRANSFORM_SUPPORTED
 589 #  endif
 590 #endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */
 591
 592 #define PNG_WRITE_INTERLACING_SUPPORTED  /* not required for PNG-compliant
 593                                             encoders, but can cause trouble
 594                                             if left undefined */
 595
 596 #if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \
 597      defined(PNG_FLOATING_POINT_SUPPORTED)
 598 #  define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
 599 #endif
 600
 601 #ifndef PNG_NO_WRITE_FLUSH
 602 #  define PNG_WRITE_FLUSH_SUPPORTED
 603 #endif
 604
 605 /* Deprecated, see PNG_MNG_FEATURES_SUPPORTED, above */
 606 #ifndef PNG_NO_WRITE_EMPTY_PLTE
 607 #  define PNG_WRITE_EMPTY_PLTE_SUPPORTED
 608 #endif
 609
 610 #endif /* PNG_WRITE_SUPPORTED */
 611
 612 #ifndef PNG_1_0_X
 613 #  ifndef PNG_NO_ERROR_NUMBERS
 614 #    define PNG_ERROR_NUMBERS_SUPPORTED
 615 #  endif
 616 #endif /* PNG_1_0_X */
 617
 618 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
 619     defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
 620 #  ifndef PNG_NO_USER_TRANSFORM_PTR
 621 #    define PNG_USER_TRANSFORM_PTR_SUPPORTED
 622 #  endif
 623 #endif
 624
 625 #ifndef PNG_NO_STDIO
 626 #  define PNG_TIME_RFC1123_SUPPORTED
 627 #endif
 628
 629 /* This adds extra functions in pngget.c for accessing data from the
 630  * info pointer (added in version 0.99)
 631  * png_get_image_width()
 632  * png_get_image_height()
 633  * png_get_bit_depth()
 634  * png_get_color_type()
 635  * png_get_compression_type()
 636  * png_get_filter_type()
 637  * png_get_interlace_type()
 638  * png_get_pixel_aspect_ratio()
 639  * png_get_pixels_per_meter()
 640  * png_get_x_offset_pixels()
 641  * png_get_y_offset_pixels()
 642  * png_get_x_offset_microns()
 643  * png_get_y_offset_microns()
 644  */
 645 #if !defined(PNG_NO_EASY_ACCESS) && !defined(PNG_EASY_ACCESS_SUPPORTED)
 646 #  define PNG_EASY_ACCESS_SUPPORTED
 647 #endif
 648
 649 /* PNG_ASSEMBLER_CODE was enabled by default in version 1.2.0
 650    even when PNG_USE_PNGVCRD or PNG_USE_PNGGCCRD is not defined */
 651 #if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_ASSEMBLER_CODE)
 652 #  ifndef PNG_ASSEMBLER_CODE_SUPPORTED
 653 #    define PNG_ASSEMBLER_CODE_SUPPORTED
 654 #  endif
 655 #  if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
 656 #    define PNG_MMX_CODE_SUPPORTED
 657 #  endif
 658 #endif
 659
 660 /* If you are sure that you don't need thread safety and you are compiling
 661    with PNG_USE_PNGCCRD for an MMX application, you can define this for
 662    faster execution.  See pnggccrd.c.
 663 #define PNG_THREAD_UNSAFE_OK
 664 */
 665
 666 #if !defined(PNG_1_0_X)
 667 #if !defined(PNG_NO_USER_MEM) && !defined(PNG_USER_MEM_SUPPORTED)
 668 #  define PNG_USER_MEM_SUPPORTED
 669 #endif
 670 #endif /* PNG_1_0_X */
 671
 672 /* Added at libpng-1.2.6 */
 673 #if !defined(PNG_1_0_X)
 674 #ifndef PNG_SET_USER_LIMITS_SUPPORTED
 675 #if !defined(PNG_NO_SET_USER_LIMITS) && !defined(PNG_SET_USER_LIMITS_SUPPORTED)
 676 #  define PNG_SET_USER_LIMITS_SUPPORTED
 677 #endif
 678 #endif
 679 #endif /* PNG_1_0_X */
 680
 681 /* Added at libpng-1.0.16 and 1.2.6.  To accept all valid PNGS no matter
 682  * how large, set these limits to 0x7fffffffL
 683  */
 684 #ifndef PNG_USER_WIDTH_MAX
 685 #  define PNG_USER_WIDTH_MAX 1000000L
 686 #endif
 687 #ifndef PNG_USER_HEIGHT_MAX
 688 #  define PNG_USER_HEIGHT_MAX 1000000L
 689 #endif
 690
 691 /* These are currently experimental features, define them if you want */
 692
 693 /* very little testing */
 694 /*
 695 #ifdef PNG_READ_SUPPORTED
 696 #  ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
 697 #    define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
 698 #  endif
 699 #endif
 700 */
 701
 702 /* This is only for PowerPC big-endian and 680x0 systems */
 703 /* some testing */
 704 /*
 705 #ifndef PNG_READ_BIG_ENDIAN_SUPPORTED
 706 #  define PNG_READ_BIG_ENDIAN_SUPPORTED
 707 #endif
 708 */
 709
 710 /* Buggy compilers (e.g., gcc 2.7.2.2) need this */
 711 /*
 712 #define PNG_NO_POINTER_INDEXING
 713 */
 714
 715 /* These functions are turned off by default, as they will be phased out. */
 716 /*
 717 #define  PNG_USELESS_TESTS_SUPPORTED
 718 #define  PNG_CORRECT_PALETTE_SUPPORTED
 719 */
 720
 721 /* Any chunks you are not interested in, you can undef here.  The
 722  * ones that allocate memory may be expecially important (hIST,
 723  * tEXt, zTXt, tRNS, pCAL).  Others will just save time and make png_info
 724  * a bit smaller.
 725  */
 726
 727 #if defined(PNG_READ_SUPPORTED) && \
 728     !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
 729     !defined(PNG_NO_READ_ANCILLARY_CHUNKS)
 730 #  define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
 731 #endif
 732
 733 #if defined(PNG_WRITE_SUPPORTED) && \
 734     !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
 735     !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS)
 736 #  define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
 737 #endif
 738
 739 #ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
 740
 741 #ifdef PNG_NO_READ_TEXT
 742 #  define PNG_NO_READ_iTXt
 743 #  define PNG_NO_READ_tEXt
 744 #  define PNG_NO_READ_zTXt
 745 #endif
 746 #ifndef PNG_NO_READ_bKGD
 747 #  define PNG_READ_bKGD_SUPPORTED
 748 #  define PNG_bKGD_SUPPORTED
 749 #endif
 750 #ifndef PNG_NO_READ_cHRM
 751 #  define PNG_READ_cHRM_SUPPORTED
 752 #  define PNG_cHRM_SUPPORTED
 753 #endif
 754 #ifndef PNG_NO_READ_gAMA
 755 #  define PNG_READ_gAMA_SUPPORTED
 756 #  define PNG_gAMA_SUPPORTED
 757 #endif
 758 #ifndef PNG_NO_READ_hIST
 759 #  define PNG_READ_hIST_SUPPORTED
 760 #  define PNG_hIST_SUPPORTED
 761 #endif
 762 #ifndef PNG_NO_READ_iCCP
 763 #  define PNG_READ_iCCP_SUPPORTED
 764 #  define PNG_iCCP_SUPPORTED
 765 #endif
 766 #ifndef PNG_NO_READ_iTXt
 767 #  ifndef PNG_READ_iTXt_SUPPORTED
 768 #    define PNG_READ_iTXt_SUPPORTED
 769 #  endif
 770 #  ifndef PNG_iTXt_SUPPORTED
 771 #    define PNG_iTXt_SUPPORTED
 772 #  endif
 773 #endif
 774 #ifndef PNG_NO_READ_oFFs
 775 #  define PNG_READ_oFFs_SUPPORTED
 776 #  define PNG_oFFs_SUPPORTED
 777 #endif
 778 #ifndef PNG_NO_READ_pCAL
 779 #  define PNG_READ_pCAL_SUPPORTED
 780 #  define PNG_pCAL_SUPPORTED
 781 #endif
 782 #ifndef PNG_NO_READ_sCAL
 783 #  define PNG_READ_sCAL_SUPPORTED
 784 #  define PNG_sCAL_SUPPORTED
 785 #endif
 786 #ifndef PNG_NO_READ_pHYs
 787 #  define PNG_READ_pHYs_SUPPORTED
 788 #  define PNG_pHYs_SUPPORTED
 789 #endif
 790 #ifndef PNG_NO_READ_sBIT
 791 #  define PNG_READ_sBIT_SUPPORTED
 792 #  define PNG_sBIT_SUPPORTED
 793 #endif
 794 #ifndef PNG_NO_READ_sPLT
 795 #  define PNG_READ_sPLT_SUPPORTED
 796 #  define PNG_sPLT_SUPPORTED
 797 #endif
 798 #ifndef PNG_NO_READ_sRGB
 799 #  define PNG_READ_sRGB_SUPPORTED
 800 #  define PNG_sRGB_SUPPORTED
 801 #endif
 802 #ifndef PNG_NO_READ_tEXt
 803 #  define PNG_READ_tEXt_SUPPORTED
 804 #  define PNG_tEXt_SUPPORTED
 805 #endif
 806 #ifndef PNG_NO_READ_tIME
 807 #  define PNG_READ_tIME_SUPPORTED
 808 #  define PNG_tIME_SUPPORTED
 809 #endif
 810 #ifndef PNG_NO_READ_tRNS
 811 #  define PNG_READ_tRNS_SUPPORTED
 812 #  define PNG_tRNS_SUPPORTED
 813 #endif
 814 #ifndef PNG_NO_READ_zTXt
 815 #  define PNG_READ_zTXt_SUPPORTED
 816 #  define PNG_zTXt_SUPPORTED
 817 #endif
 818 #ifndef PNG_NO_READ_UNKNOWN_CHUNKS
 819 #  define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
 820 #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
 821 #    define PNG_UNKNOWN_CHUNKS_SUPPORTED
 822 #  endif
 823 #  ifndef PNG_NO_HANDLE_AS_UNKNOWN
 824 #    define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
 825 #  endif
 826 #endif
 827 #if !defined(PNG_NO_READ_USER_CHUNKS) && \
 828      defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
 829 #  define PNG_READ_USER_CHUNKS_SUPPORTED
 830 #  define PNG_USER_CHUNKS_SUPPORTED
 831 #  ifdef PNG_NO_READ_UNKNOWN_CHUNKS
 832 #    undef PNG_NO_READ_UNKNOWN_CHUNKS
 833 #  endif
 834 #  ifdef PNG_NO_HANDLE_AS_UNKNOWN
 835 #    undef PNG_NO_HANDLE_AS_UNKNOWN
 836 #  endif
 837 #endif
 838 #ifndef PNG_NO_READ_OPT_PLTE
 839 #  define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */
 840 #endif                      /* optional PLTE chunk in RGB and RGBA images */
 841 #if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \
 842     defined(PNG_READ_zTXt_SUPPORTED)
 843 #  define PNG_READ_TEXT_SUPPORTED
 844 #  define PNG_TEXT_SUPPORTED
 845 #endif
 846
 847 #endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */
 848
 849 #ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
 850
 851 #ifdef PNG_NO_WRITE_TEXT
 852 #  define PNG_NO_WRITE_iTXt
 853 #  define PNG_NO_WRITE_tEXt
 854 #  define PNG_NO_WRITE_zTXt
 855 #endif
 856 #ifndef PNG_NO_WRITE_bKGD
 857 #  define PNG_WRITE_bKGD_SUPPORTED
 858 #  ifndef PNG_bKGD_SUPPORTED
 859 #    define PNG_bKGD_SUPPORTED
 860 #  endif
 861 #endif
 862 #ifndef PNG_NO_WRITE_cHRM
 863 #  define PNG_WRITE_cHRM_SUPPORTED
 864 #  ifndef PNG_cHRM_SUPPORTED
 865 #    define PNG_cHRM_SUPPORTED
 866 #  endif
 867 #endif
 868 #ifndef PNG_NO_WRITE_gAMA
 869 #  define PNG_WRITE_gAMA_SUPPORTED
 870 #  ifndef PNG_gAMA_SUPPORTED
 871 #    define PNG_gAMA_SUPPORTED
 872 #  endif
 873 #endif
 874 #ifndef PNG_NO_WRITE_hIST
 875 #  define PNG_WRITE_hIST_SUPPORTED
 876 #  ifndef PNG_hIST_SUPPORTED
 877 #    define PNG_hIST_SUPPORTED
 878 #  endif
 879 #endif
 880 #ifndef PNG_NO_WRITE_iCCP
 881 #  define PNG_WRITE_iCCP_SUPPORTED
 882 #  ifndef PNG_iCCP_SUPPORTED
 883 #    define PNG_iCCP_SUPPORTED
 884 #  endif
 885 #endif
 886 #ifndef PNG_NO_WRITE_iTXt
 887 #  ifndef PNG_WRITE_iTXt_SUPPORTED
 888 #    define PNG_WRITE_iTXt_SUPPORTED
 889 #  endif
 890 #  ifndef PNG_iTXt_SUPPORTED
 891 #    define PNG_iTXt_SUPPORTED
 892 #  endif
 893 #endif
 894 #ifndef PNG_NO_WRITE_oFFs
 895 #  define PNG_WRITE_oFFs_SUPPORTED
 896 #  ifndef PNG_oFFs_SUPPORTED
 897 #    define PNG_oFFs_SUPPORTED
 898 #  endif
 899 #endif
 900 #ifndef PNG_NO_WRITE_pCAL
 901 #  define PNG_WRITE_pCAL_SUPPORTED
 902 #  ifndef PNG_pCAL_SUPPORTED
 903 #    define PNG_pCAL_SUPPORTED
 904 #  endif
 905 #endif
 906 #ifndef PNG_NO_WRITE_sCAL
 907 #  define PNG_WRITE_sCAL_SUPPORTED
 908 #  ifndef PNG_sCAL_SUPPORTED
 909 #    define PNG_sCAL_SUPPORTED
 910 #  endif
 911 #endif
 912 #ifndef PNG_NO_WRITE_pHYs
 913 #  define PNG_WRITE_pHYs_SUPPORTED
 914 #  ifndef PNG_pHYs_SUPPORTED
 915 #    define PNG_pHYs_SUPPORTED
 916 #  endif
 917 #endif
 918 #ifndef PNG_NO_WRITE_sBIT
 919 #  define PNG_WRITE_sBIT_SUPPORTED
 920 #  ifndef PNG_sBIT_SUPPORTED
 921 #    define PNG_sBIT_SUPPORTED
 922 #  endif
 923 #endif
 924 #ifndef PNG_NO_WRITE_sPLT
 925 #  define PNG_WRITE_sPLT_SUPPORTED
 926 #  ifndef PNG_sPLT_SUPPORTED
 927 #    define PNG_sPLT_SUPPORTED
 928 #  endif
 929 #endif
 930 #ifndef PNG_NO_WRITE_sRGB
 931 #  define PNG_WRITE_sRGB_SUPPORTED
 932 #  ifndef PNG_sRGB_SUPPORTED
 933 #    define PNG_sRGB_SUPPORTED
 934 #  endif
 935 #endif
 936 #ifndef PNG_NO_WRITE_tEXt
 937 #  define PNG_WRITE_tEXt_SUPPORTED
 938 #  ifndef PNG_tEXt_SUPPORTED
 939 #    define PNG_tEXt_SUPPORTED
 940 #  endif
 941 #endif
 942 #ifndef PNG_NO_WRITE_tIME
 943 #  define PNG_WRITE_tIME_SUPPORTED
 944 #  ifndef PNG_tIME_SUPPORTED
 945 #    define PNG_tIME_SUPPORTED
 946 #  endif
 947 #endif
 948 #ifndef PNG_NO_WRITE_tRNS
 949 #  define PNG_WRITE_tRNS_SUPPORTED
 950 #  ifndef PNG_tRNS_SUPPORTED
 951 #    define PNG_tRNS_SUPPORTED
 952 #  endif
 953 #endif
 954 #ifndef PNG_NO_WRITE_zTXt
 955 #  define PNG_WRITE_zTXt_SUPPORTED
 956 #  ifndef PNG_zTXt_SUPPORTED
 957 #    define PNG_zTXt_SUPPORTED
 958 #  endif
 959 #endif
 960 #ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS
 961 #  define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
 962 #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
 963 #    define PNG_UNKNOWN_CHUNKS_SUPPORTED
 964 #  endif
 965 #  ifndef PNG_NO_HANDLE_AS_UNKNOWN
 966 #     ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
 967 #       define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
 968 #     endif
 969 #  endif
 970 #endif
 971 #if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
 972     defined(PNG_WRITE_zTXt_SUPPORTED)
 973 #  define PNG_WRITE_TEXT_SUPPORTED
 974 #  ifndef PNG_TEXT_SUPPORTED
 975 #    define PNG_TEXT_SUPPORTED
 976 #  endif
 977 #endif
 978
 979 #endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */
 980
 981 /* Turn this off to disable png_read_png() and
 982  * png_write_png() and leave the row_pointers member
 983  * out of the info structure.
 984  */
 985 #ifndef PNG_NO_INFO_IMAGE
 986 #  define PNG_INFO_IMAGE_SUPPORTED
 987 #endif
 988
 989 /* need the time information for reading tIME chunks */
 990 #if defined(PNG_tIME_SUPPORTED)
 991 #  if !defined(_WIN32_WCE)
 992      /* "time.h" functions are not supported on WindowsCE */
 993 #    include <time.h>
 994 #  endif
 995 #endif
 996
 997 /* Some typedefs to get us started.  These should be safe on most of the
 998  * common platforms.  The typedefs should be at least as large as the
 999  * numbers suggest (a png_uint_32 must be at least 32 bits long), but they
1000  * don't have to be exactly that size.  Some compilers dislike passing
1001  * unsigned shorts as function parameters, so you may be better off using
1002  * unsigned int for png_uint_16.  Likewise, for 64-bit systems, you may
1003  * want to have unsigned int for png_uint_32 instead of unsigned long.
1004  */
1005
1006 typedef unsigned long png_uint_32;
1007 typedef long png_int_32;
1008 typedef unsigned short png_uint_16;
1009 typedef short png_int_16;
1010 typedef unsigned char png_byte;
1011
1012 /* This is usually size_t.  It is typedef'ed just in case you need it to
1013    change (I'm not sure if you will or not, so I thought I'd be safe) */
1014 #ifdef PNG_SIZE_T
1015    typedef PNG_SIZE_T png_size_t;
1016 #  define png_sizeof(x) png_convert_size(sizeof (x))
1017 #else
1018    typedef size_t png_size_t;
1019 #  define png_sizeof(x) sizeof (x)
1020 #endif
1021
1022 /* The following is needed for medium model support.  It cannot be in the
1023  * PNG_INTERNAL section.  Needs modification for other compilers besides
1024  * MSC.  Model independent support declares all arrays and pointers to be
1025  * large using the far keyword.  The zlib version used must also support
1026  * model independent data.  As of version zlib 1.0.4, the necessary changes
1027  * have been made in zlib.  The USE_FAR_KEYWORD define triggers other
1028  * changes that are needed. (Tim Wegner)
1029  */
1030
1031 /* Separate compiler dependencies (problem here is that zlib.h always
1032    defines FAR. (SJT) */
1033 #ifdef __BORLANDC__
1034 #  if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)
1035 #    define LDATA 1
1036 #  else
1037 #    define LDATA 0
1038 #  endif
1039    /* GRR:  why is Cygwin in here?  Cygwin is not Borland C... */
1040 #  if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)
1041 #    define PNG_MAX_MALLOC_64K
1042 #    if (LDATA != 1)
1043 #      ifndef FAR
1044 #        define FAR __far
1045 #      endif
1046 #      define USE_FAR_KEYWORD
1047 #    endif   /* LDATA != 1 */
1048      /* Possibly useful for moving data out of default segment.
1049       * Uncomment it if you want. Could also define FARDATA as
1050       * const if your compiler supports it. (SJT)
1051 #    define FARDATA FAR
1052       */
1053 #  endif  /* __WIN32__, __FLAT__, __CYGWIN__ */
1054 #endif   /* __BORLANDC__ */
1055
1056
1057 /* Suggest testing for specific compiler first before testing for
1058  * FAR.  The Watcom compiler defines both __MEDIUM__ and M_I86MM,
1059  * making reliance oncertain keywords suspect. (SJT)
1060  */
1061
1062 /* MSC Medium model */
1063 #if defined(FAR)
1064 #  if defined(M_I86MM)
1065 #    define USE_FAR_KEYWORD
1066 #    define FARDATA FAR
1067 #    include <dos.h>
1068 #  endif
1069 #endif
1070
1071 /* SJT: default case */
1072 #ifndef FAR
1073 #  define FAR
1074 #endif
1075
1076 /* At this point FAR is always defined */
1077 #ifndef FARDATA
1078 #  define FARDATA
1079 #endif
1080
1081 /* Typedef for floating-point numbers that are converted
1082    to fixed-point with a multiple of 100,000, e.g., int_gamma */
1083 typedef png_int_32 png_fixed_point;
1084
1085 /* Add typedefs for pointers */
1086 typedef void            FAR * png_voidp;
1087 typedef png_byte        FAR * png_bytep;
1088 typedef png_uint_32     FAR * png_uint_32p;
1089 typedef png_int_32      FAR * png_int_32p;
1090 typedef png_uint_16     FAR * png_uint_16p;
1091 typedef png_int_16      FAR * png_int_16p;
1092 typedef PNG_CONST char  FAR * png_const_charp;
1093 typedef char            FAR * png_charp;
1094 typedef png_fixed_point FAR * png_fixed_point_p;
1095
1096 #ifndef PNG_NO_STDIO
1097 #if defined(_WIN32_WCE)
1098 typedef HANDLE                png_FILE_p;
1099 #else
1100 typedef FILE                * png_FILE_p;
1101 #endif
1102 #endif
1103
1104 #ifdef PNG_FLOATING_POINT_SUPPORTED
1105 typedef double          FAR * png_doublep;
1106 #endif
1107
1108 /* Pointers to pointers; i.e. arrays */
1109 typedef png_byte        FAR * FAR * png_bytepp;
1110 typedef png_uint_32     FAR * FAR * png_uint_32pp;
1111 typedef png_int_32      FAR * FAR * png_int_32pp;
1112 typedef png_uint_16     FAR * FAR * png_uint_16pp;
1113 typedef png_int_16      FAR * FAR * png_int_16pp;
1114 typedef PNG_CONST char  FAR * FAR * png_const_charpp;
1115 typedef char            FAR * FAR * png_charpp;
1116 typedef png_fixed_point FAR * FAR * png_fixed_point_pp;
1117 #ifdef PNG_FLOATING_POINT_SUPPORTED
1118 typedef double          FAR * FAR * png_doublepp;
1119 #endif
1120
1121 /* Pointers to pointers to pointers; i.e., pointer to array */
1122 typedef char            FAR * FAR * FAR * png_charppp;
1123
1124 /* libpng typedefs for types in zlib. If zlib changes
1125  * or another compression library is used, then change these.
1126  * Eliminates need to change all the source files.
1127  */
1128 typedef charf *         png_zcharp;
1129 typedef charf * FAR *   png_zcharpp;
1130 typedef z_stream FAR *  png_zstreamp;
1131
1132 /*
1133  * Define PNG_BUILD_DLL if the module being built is a Windows
1134  * LIBPNG DLL.
1135  *
1136  * Define PNG_USE_DLL if you want to *link* to the Windows LIBPNG DLL.
1137  * It is equivalent to Microsoft predefined macro _DLL that is
1138  * automatically defined when you compile using the share
1139  * version of the CRT (C Run-Time library)
1140  *
1141  * The cygwin mods make this behavior a little different:
1142  * Define PNG_BUILD_DLL if you are building a dll for use with cygwin
1143  * Define PNG_STATIC if you are building a static library for use with cygwin,
1144  *   -or- if you are building an application that you want to link to the
1145  *   static library.
1146  * PNG_USE_DLL is defined by default (no user action needed) unless one of
1147  *   the other flags is defined.
1148  */
1149
1150 #if !defined(PNG_DLL) && (defined(PNG_BUILD_DLL) || defined(PNG_USE_DLL))
1151 #  define PNG_DLL
1152 #endif
1153 /* If CYGWIN, then disallow GLOBAL ARRAYS unless building a static lib.
1154  * When building a static lib, default to no GLOBAL ARRAYS, but allow
1155  * command-line override
1156  */
1157 #if defined(__CYGWIN__)
1158 #  if !defined(PNG_STATIC)
1159 #    if defined(PNG_USE_GLOBAL_ARRAYS)
1160 #      undef PNG_USE_GLOBAL_ARRAYS
1161 #    endif
1162 #    if !defined(PNG_USE_LOCAL_ARRAYS)
1163 #      define PNG_USE_LOCAL_ARRAYS
1164 #    endif
1165 #  else
1166 #    if defined(PNG_USE_LOCAL_ARRAYS) || defined(PNG_NO_GLOBAL_ARRAYS)
1167 #      if defined(PNG_USE_GLOBAL_ARRAYS)
1168 #        undef PNG_USE_GLOBAL_ARRAYS
1169 #      endif
1170 #    endif
1171 #  endif
1172 #  if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1173 #    define PNG_USE_LOCAL_ARRAYS
1174 #  endif
1175 #endif
1176
1177 /* Do not use global arrays (helps with building DLL's)
1178  * They are no longer used in libpng itself, since version 1.0.5c,
1179  * but might be required for some pre-1.0.5c applications.
1180  */
1181 #if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1182 #  if defined(PNG_NO_GLOBAL_ARRAYS) || (defined(__GNUC__) && defined(PNG_DLL))
1183 #    define PNG_USE_LOCAL_ARRAYS
1184 #  else
1185 #    define PNG_USE_GLOBAL_ARRAYS
1186 #  endif
1187 #endif
1188
1189 #if defined(__CYGWIN__) || defined(__WINE__)
1190 #  undef PNGAPI
1191 #  if defined(__WINE__)
1192 #    define PNGAPI
1193 #  else
1194 #    define PNGAPI __cdecl
1195 #  endif
1196 #  undef PNG_IMPEXP
1197 #  define PNG_IMPEXP
1198 #endif
1199
1200 /* If you define PNGAPI, e.g., with compiler option "-DPNGAPI=__stdcall",
1201  * you may get warnings regarding the linkage of png_zalloc and png_zfree.
1202  * Don't ignore those warnings; you must also reset the default calling
1203  * convention in your compiler to match your PNGAPI, and you must build
1204  * zlib and your applications the same way you build libpng.
1205  */
1206
1207 #if defined(__MINGW32__) && !defined(PNG_MODULEDEF)
1208 #  ifndef PNG_NO_MODULEDEF
1209 #    define PNG_NO_MODULEDEF
1210 #  endif
1211 #endif
1212
1213 #if !defined(PNG_IMPEXP) && defined(PNG_BUILD_DLL) && !defined(PNG_NO_MODULEDEF)
1214 #  define PNG_IMPEXP
1215 #endif
1216
1217 #if defined(PNG_DLL) || defined(_DLL) || defined(__DLL__ ) || \
1218     (( defined(_Windows) || defined(_WINDOWS) || \
1219        defined(WIN32) || defined(_WIN32) || defined(__WIN32__) ))
1220
1221 #  ifndef PNGAPI
1222 #     if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
1223 #        define PNGAPI __cdecl
1224 #     else
1225 #        define PNGAPI _cdecl
1226 #     endif
1227 #  endif
1228
1229 #  if !defined(PNG_IMPEXP) && (!defined(PNG_DLL) || \
1230        0 /* WINCOMPILER_WITH_NO_SUPPORT_FOR_DECLIMPEXP */)
1231 #     define PNG_IMPEXP
1232 #  endif
1233
1234 #  if !defined(PNG_IMPEXP)
1235
1236 #     define PNG_EXPORT_TYPE1(type,symbol)  PNG_IMPEXP type PNGAPI symbol
1237 #     define PNG_EXPORT_TYPE2(type,symbol)  type PNG_IMPEXP PNGAPI symbol
1238
1239       /* Borland/Microsoft */
1240 #     if defined(_MSC_VER) || defined(__BORLANDC__)
1241 #        if (_MSC_VER >= 800) || (__BORLANDC__ >= 0x500)
1242 #           define PNG_EXPORT PNG_EXPORT_TYPE1
1243 #        else
1244 #           define PNG_EXPORT PNG_EXPORT_TYPE2
1245 #           if defined(PNG_BUILD_DLL)
1246 #              define PNG_IMPEXP __export
1247 #           else
1248 #              define PNG_IMPEXP /*__import */ /* doesn't exist AFAIK in
1249                                                  VC++ */
1250 #           endif                             /* Exists in Borland C++ for
1251                                                  C++ classes (== huge) */
1252 #        endif
1253 #     endif
1254
1255 #     if !defined(PNG_IMPEXP)
1256 #        if defined(PNG_BUILD_DLL)
1257 #           define PNG_IMPEXP __declspec(dllexport)
1258 #        else
1259 #           define PNG_IMPEXP __declspec(dllimport)
1260 #        endif
1261 #     endif
1262 #  endif  /* PNG_IMPEXP */
1263 #else /* !(DLL || non-cygwin WINDOWS) */
1264 #   if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
1265 #      ifndef PNGAPI
1266 #         define PNGAPI _System
1267 #      endif
1268 #   else
1269 #      if 0 /* ... other platforms, with other meanings */
1270 #      endif
1271 #    endif
1272 #endif
1273
1274 #if defined(__VISAGECPP__)
1275 /* I don't compile with this _System linkage for wxWidgets */
1276 #  ifdef PNGAPI
1277 #    undef PNGAPI
1278 #  endif
1279 #  define PNGAPI _Optlink
1280 #  define PNG_IMPEXP
1281 #  define PNG_USE_LOCAL_ARRAYS
1282 #  ifdef PNG_USE_GLOBAL_ARRAYS
1283 #    undef PNG_USE_GLOBAL_ARRAYS
1284 #  endif
1285 extern const char png_libpng_ver[18];
1286 #endif
1287
1288 #ifndef PNGAPI
1289 #  define PNGAPI
1290 #endif
1291 #ifndef PNG_IMPEXP
1292 #  define PNG_IMPEXP
1293 #endif
1294
1295 #ifndef PNG_EXPORT
1296 #  define PNG_EXPORT(type,symbol) PNG_IMPEXP type PNGAPI symbol
1297 #endif
1298
1299 #ifdef PNG_USE_GLOBAL_ARRAYS
1300 #  ifndef PNG_EXPORT_VAR
1301 #    define PNG_EXPORT_VAR(type) extern PNG_IMPEXP type
1302 #  endif
1303 #endif
1304
1305 /* User may want to use these so they are not in PNG_INTERNAL. Any library
1306  * functions that are passed far data must be model independent.
1307  */
1308
1309 #ifndef PNG_ABORT
1310 #  define PNG_ABORT() abort()
1311 #endif
1312
1313 #ifdef PNG_SETJMP_SUPPORTED
1314 #  define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf)
1315 #else
1316 #  define png_jmpbuf(png_ptr) \
1317    (LIBPNG_WAS_COMPILED_WITH__PNG_SETJMP_NOT_SUPPORTED)
1318 #endif
1319
1320 #if defined(USE_FAR_KEYWORD)  /* memory model independent fns */
1321 /* use this to make far-to-near assignments */
1322 #  define CHECK   1
1323 #  define NOCHECK 0
1324 #  define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK))
1325 #  define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK))
1326 #  define png_strcpy  _fstrcpy
1327 #  define png_strncpy _fstrncpy   /* Added to v 1.2.6 */
1328 #  define png_strlen  _fstrlen
1329 #  define png_memcmp  _fmemcmp    /* SJT: added */
1330 #  define png_memcpy  _fmemcpy
1331 #  define png_memset  _fmemset
1332 #else /* use the usual functions */
1333 #  define CVT_PTR(ptr)         (ptr)
1334 #  define CVT_PTR_NOCHECK(ptr) (ptr)
1335 #  define png_strcpy  strcpy
1336 #  define png_strncpy strncpy     /* Added to v 1.2.6 */
1337 #  define png_strlen  strlen
1338 #  define png_memcmp  memcmp      /* SJT: added */
1339 #  define png_memcpy  memcpy
1340 #  define png_memset  memset
1341 #endif
1342 /* End of memory model independent support */
1343
1344 /* Just a little check that someone hasn't tried to define something
1345  * contradictory.
1346  */
1347 #if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K)
1348 #  undef PNG_ZBUF_SIZE
1349 #  define PNG_ZBUF_SIZE 65536L
1350 #endif
1351
1352 #ifdef PNG_READ_SUPPORTED
1353 /* Prior to libpng-1.0.9, this block was in pngasmrd.h */
1354 #if defined(PNG_INTERNAL)
1355
1356 /* These are the default thresholds before the MMX code kicks in; if either
1357  * rowbytes or bitdepth is below the threshold, plain C code is used.  These
1358  * can be overridden at runtime via the png_set_mmx_thresholds() call in
1359  * libpng 1.2.0 and later.  The values below were chosen by Intel.
1360  */
1361
1362 #ifndef PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT
1363 #  define PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT  128  /*  >=  */
1364 #endif
1365 #ifndef PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT
1366 #  define PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT  9    /*  >=  */
1367 #endif
1368
1369 /* Set this in the makefile for VC++ on Pentium, not here. */
1370 /* Platform must be Pentium.  Makefile must assemble and load pngvcrd.c .
1371  * MMX will be detected at run time and used if present.
1372  */
1373 #ifdef PNG_USE_PNGVCRD
1374 #  define PNG_HAVE_ASSEMBLER_COMBINE_ROW
1375 #  define PNG_HAVE_ASSEMBLER_READ_INTERLACE
1376 #  define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
1377 #endif
1378
1379 /* Set this in the makefile for gcc/as on Pentium, not here. */
1380 /* Platform must be Pentium.  Makefile must assemble and load pnggccrd.c .
1381  * MMX will be detected at run time and used if present.
1382  */
1383 #ifdef PNG_USE_PNGGCCRD
1384 #  define PNG_HAVE_ASSEMBLER_COMBINE_ROW
1385 #  define PNG_HAVE_ASSEMBLER_READ_INTERLACE
1386 #  define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
1387 #endif
1388 /* - see pnggccrd.c for info about what is currently enabled */
1389
1390 #endif /* PNG_INTERNAL */
1391 #endif /* PNG_READ_SUPPORTED */
1392
1393 #endif /* PNGCONF_H */
1394