compiler/libpng/pngconf.h

   1 /* pngconf.h - machine configurable file for libpng
   2  *
   3  * libpng 1.0.10 - March 30, 2001
   4  * For conditions of distribution and use, see copyright notice in png.h
   5  * Copyright (c) 1998-2001 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 /* Enable if you need to support PNGs that are embedded in MNG
  49    datastreams */
  50 /*
  51 #ifndef PNG_NO_MNG_FEATURES
  52 #  ifndef PNG_MNG_FEATURES_SUPPORTED
  53 #    define PNG_MNG_FEATURES_SUPPORTED
  54 #  endif
  55 #endif
  56 */
  57
  58 #ifndef PNG_NO_FLOATING_POINT_SUPPORTED
  59 #  ifndef PNG_FLOATING_POINT_SUPPORTED
  60 #    define PNG_FLOATING_POINT_SUPPORTED
  61 #  endif
  62 #endif
  63
  64 /* If you are running on a machine where you cannot allocate more
  65  * than 64K of memory at once, uncomment this.  While libpng will not
  66  * normally need that much memory in a chunk (unless you load up a very
  67  * large file), zlib needs to know how big of a chunk it can use, and
  68  * libpng thus makes sure to check any memory allocation to verify it
  69  * will fit into memory.
  70 #define PNG_MAX_MALLOC_64K
  71  */
  72 #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
  73 #  define PNG_MAX_MALLOC_64K
  74 #endif
  75
  76 /* Special munging to support doing things the 'cygwin' way:
  77  * 'Normal' png-on-win32 defines/defaults:
  78  *   PNG_BUILD_DLL -- building dll
  79  *   PNG_USE_DLL   -- building an application, linking to dll
  80  *   (no define)   -- building static library, or building an
  81  *                    application and linking to the static lib
  82  * 'Cygwin' defines/defaults:
  83  *   PNG_BUILD_DLL -- building the dll
  84  *   (no define)   -- building an application, linking to the dll
  85  *   PNG_STATIC    -- building the static lib, or building an application
  86  *                    that links to the static lib.
  87  *   ALL_STATIC    -- building various static libs, or building an application
  88  *                    that links to the static libs.
  89  * Thus,
  90  * a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and
  91  * this bit of #ifdefs will define the 'correct' config variables based on
  92  * that. If a cygwin user *wants* to define 'PNG_USE_DLL' that's okay, but
  93  * unnecessary.
  94  */
  95 #if defined(__CYGWIN__)
  96 #  if defined(PNG_BUILD_DLL)
  97 #    if defined(PNG_USE_DLL)
  98 #      undef PNG_USE_DLL
  99 #    endif
 100 #    if !defined(PNG_DLL)
 101 #      define PNG_DLL
 102 #    endif
 103 #    if defined(PNG_STATIC)
 104 #      undef PNG_STATIC
 105 #    endif
 106 #  else
 107 #    if defined(ALL_STATIC)
 108 #      define PNG_STATIC
 109 #    endif
 110 #    if defined(PNG_STATIC)
 111 #      if defined(PNG_USE_DLL)
 112 #        undef PNG_USE_DLL
 113 #      endif
 114 #      if defined(PNG_DLL)
 115 #        undef PNG_DLL
 116 #      endif
 117 #    else
 118 #      if defined(PNG_USE_DLL)
 119 #        if !defined(PNG_DLL)
 120 #          define PNG_DLL
 121 #        endif
 122 #      else
 123 #        if defined(PNG_DLL)
 124 #           define PNG_USE_DLL
 125 #        else
 126 #           define PNG_USE_DLL
 127 #           define PNG_DLL
 128 #        endif
 129 #      endif
 130 #    endif
 131 #  endif
 132 #endif
 133
 134
 135 /* This protects us against compilers that run on a windowing system
 136  * and thus don't have or would rather us not use the stdio types:
 137  * stdin, stdout, and stderr.  The only one currently used is stderr
 138  * in png_error() and png_warning().  #defining PNG_NO_CONSOLE_IO will
 139  * prevent these from being compiled and used. #defining PNG_NO_STDIO
 140  * will also prevent these, plus will prevent the entire set of stdio
 141  * macros and functions (FILE *, printf, etc.) from being compiled and used,
 142  * unless (PNG_DEBUG > 0) has been #defined.
 143  *
 144  * #define PNG_NO_CONSOLE_IO
 145  * #define PNG_NO_STDIO
 146  */
 147
 148 #if defined(_WIN32_WCE)
 149 #  include <windows.h>
 150    /* Console I/O functions are not supported on WindowsCE */
 151 #  define PNG_NO_CONSOLE_IO
 152 #  ifdef PNG_DEBUG
 153 #    undef PNG_DEBUG
 154 #  endif
 155 #endif
 156
 157 #ifdef PNG_BUILD_DLL
 158 #  ifndef PNG_CONSOLE_IO_SUPPORTED
 159 #    ifndef PNG_NO_CONSOLE_IO
 160 #      define PNG_NO_CONSOLE_IO
 161 #    endif
 162 #  endif
 163 #endif
 164
 165 #  ifdef PNG_NO_STDIO
 166 #    ifndef PNG_NO_CONSOLE_IO
 167 #      define PNG_NO_CONSOLE_IO
 168 #    endif
 169 #    ifdef PNG_DEBUG
 170 #      if (PNG_DEBUG > 0)
 171 #        include <stdio.h>
 172 #      endif
 173 #    endif
 174 #  else
 175 #    if !defined(_WIN32_WCE)
 176 /* "stdio.h" functions are not supported on WindowsCE */
 177 #      include <stdio.h>
 178 #    endif
 179 #  endif
 180
 181 /* This macro protects us against machines that don't have function
 182  * prototypes (ie K&R style headers).  If your compiler does not handle
 183  * function prototypes, define this macro and use the included ansi2knr.
 184  * I've always been able to use _NO_PROTO as the indicator, but you may
 185  * need to drag the empty declaration out in front of here, or change the
 186  * ifdef to suit your own needs.
 187  */
 188 #ifndef PNGARG
 189
 190 #ifdef OF /* zlib prototype munger */
 191 #  define PNGARG(arglist) OF(arglist)
 192 #else
 193
 194 #ifdef _NO_PROTO
 195 #  define PNGARG(arglist) ()
 196 #else
 197 #  define PNGARG(arglist) arglist
 198 #endif /* _NO_PROTO */
 199
 200 #endif /* OF */
 201
 202 #endif /* PNGARG */
 203
 204 /* Try to determine if we are compiling on a Mac.  Note that testing for
 205  * just __MWERKS__ is not good enough, because the Codewarrior is now used
 206  * on non-Mac platforms.
 207  */
 208 #ifndef MACOS
 209 #  if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
 210       defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC)
 211 #    define MACOS
 212 #  endif
 213 #endif
 214
 215 /* enough people need this for various reasons to include it here */
 216 #if !defined(MACOS) && !defined(RISCOS) && !defined(_WIN32_WCE)
 217 #  include <sys/types.h>
 218 #endif
 219
 220 #ifndef PNG_SETJMP_NOT_SUPPORTED
 221 #  define PNG_SETJMP_SUPPORTED
 222 #endif
 223
 224 #ifdef PNG_SETJMP_SUPPORTED
 225 /* This is an attempt to force a single setjmp behaviour on Linux.  If
 226  * the X config stuff didn't define _BSD_SOURCE we wouldn't need this.
 227  */
 228
 229 #  ifdef __linux__
 230 #    ifdef _BSD_SOURCE
 231 #      define PNG_SAVE_BSD_SOURCE
 232 #      undef _BSD_SOURCE
 233 #    endif
 234 #    ifdef _SETJMP_H
 235       __png.h__ already includes setjmp.h;
 236       __dont__ include it again.;
 237 #    endif
 238 #  endif /* __linux__ */
 239
 240    /* include setjmp.h for error handling */
 241 #  include <setjmp.h>
 242
 243 #  ifdef __linux__
 244 #    ifdef PNG_SAVE_BSD_SOURCE
 245 #      define _BSD_SOURCE
 246 #      undef PNG_SAVE_BSD_SOURCE
 247 #    endif
 248 #  endif /* __linux__ */
 249 #endif /* PNG_SETJMP_SUPPORTED */
 250
 251 #if defined(_AIX) && defined(__xlC__)
 252 /* This prevents "AIX/xlC" from generating an "index(s,c)" macro in strings.h
 253  * that conflicts with libpng's png_color_16.index */
 254 #  undef __STR__
 255 #endif
 256
 257 #ifdef BSD
 258 #  include <strings.h>
 259 #else
 260 #  include <string.h>
 261 #endif
 262
 263 /* Other defines for things like memory and the like can go here.  */
 264 #ifdef PNG_INTERNAL
 265
 266 #include <stdlib.h>
 267
 268 /* The functions exported by PNG_EXTERN are PNG_INTERNAL functions, which
 269  * aren't usually used outside the library (as far as I know), so it is
 270  * debatable if they should be exported at all.  In the future, when it is
 271  * possible to have run-time registry of chunk-handling functions, some of
 272  * these will be made available again.
 273 #define PNG_EXTERN extern
 274  */
 275 #define PNG_EXTERN
 276
 277 /* Other defines specific to compilers can go here.  Try to keep
 278  * them inside an appropriate ifdef/endif pair for portability.
 279  */
 280
 281 #if defined(PNG_FLOATING_POINT_SUPPORTED)
 282 #  if defined(MACOS)
 283      /* We need to check that <math.h> hasn't already been included earlier
 284       * as it seems it doesn't agree with <fp.h>, yet we should really use
 285       * <fp.h> if possible.
 286       */
 287 #    if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__)
 288 #      include <fp.h>
 289 #    endif
 290 #  else
 291 #    include <math.h>
 292 #  endif
 293 #  if defined(_AMIGA) && defined(__SASC) && defined(_M68881)
 294      /* Amiga SAS/C: We must include builtin FPU functions when compiling using
 295       * MATH=68881
 296       */
 297 #    include <m68881.h>
 298 #  endif
 299 #endif
 300
 301 /* Codewarrior on NT has linking problems without this. */
 302 #if (defined(__MWERKS__) && defined(WIN32)) || defined(__STDC__)
 303 #  define PNG_ALWAYS_EXTERN
 304 #endif
 305
 306 /* For some reason, Borland C++ defines memcmp, etc. in mem.h, not
 307  * stdlib.h like it should (I think).  Or perhaps this is a C++
 308  * "feature"?
 309  */
 310 #ifdef __TURBOC__
 311 #  include <mem.h>
 312 #  include "alloc.h"
 313 #endif
 314
 315 #ifdef _MSC_VER
 316 #  include <malloc.h>
 317 #endif
 318
 319 /* This controls how fine the dithering gets.  As this allocates
 320  * a largish chunk of memory (32K), those who are not as concerned
 321  * with dithering quality can decrease some or all of these.
 322  */
 323 #ifndef PNG_DITHER_RED_BITS
 324 #  define PNG_DITHER_RED_BITS 5
 325 #endif
 326 #ifndef PNG_DITHER_GREEN_BITS
 327 #  define PNG_DITHER_GREEN_BITS 5
 328 #endif
 329 #ifndef PNG_DITHER_BLUE_BITS
 330 #  define PNG_DITHER_BLUE_BITS 5
 331 #endif
 332
 333 /* This controls how fine the gamma correction becomes when you
 334  * are only interested in 8 bits anyway.  Increasing this value
 335  * results in more memory being used, and more pow() functions
 336  * being called to fill in the gamma tables.  Don't set this value
 337  * less then 8, and even that may not work (I haven't tested it).
 338  */
 339
 340 #ifndef PNG_MAX_GAMMA_8
 341 #  define PNG_MAX_GAMMA_8 11
 342 #endif
 343
 344 /* This controls how much a difference in gamma we can tolerate before
 345  * we actually start doing gamma conversion.
 346  */
 347 #ifndef PNG_GAMMA_THRESHOLD
 348 #  define PNG_GAMMA_THRESHOLD 0.05
 349 #endif
 350
 351 #endif /* PNG_INTERNAL */
 352
 353 /* The following uses const char * instead of char * for error
 354  * and warning message functions, so some compilers won't complain.
 355  * If you do not want to use const, define PNG_NO_CONST here.
 356  */
 357
 358 #ifndef PNG_NO_CONST
 359 #  define PNG_CONST const
 360 #else
 361 #  define PNG_CONST
 362 #endif
 363
 364 /* The following defines give you the ability to remove code from the
 365  * library that you will not be using.  I wish I could figure out how to
 366  * automate this, but I can't do that without making it seriously hard
 367  * on the users.  So if you are not using an ability, change the #define
 368  * to and #undef, and that part of the library will not be compiled.  If
 369  * your linker can't find a function, you may want to make sure the
 370  * ability is defined here.  Some of these depend upon some others being
 371  * defined.  I haven't figured out all the interactions here, so you may
 372  * have to experiment awhile to get everything to compile.  If you are
 373  * creating or using a shared library, you probably shouldn't touch this,
 374  * as it will affect the size of the structures, and this will cause bad
 375  * things to happen if the library and/or application ever change.
 376  */
 377
 378 /* Any features you will not be using can be undef'ed here */
 379
 380 /* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user
 381  * to turn it off with "*TRANSFORMS_NOT_SUPPORTED" or *PNG_NO_*_TRANSFORMS
 382  * on the compile line, then pick and choose which ones to define without
 383  * having to edit this file. It is safe to use the *TRANSFORMS_NOT_SUPPORTED
 384  * if you only want to have a png-compliant reader/writer but don't need
 385  * any of the extra transformations.  This saves about 80 kbytes in a
 386  * typical installation of the library. (PNG_NO_* form added in version
 387  * 1.0.1c, for consistency)
 388  */
 389
 390 /* The size of the png_text structure changed in libpng-1.0.6 when
 391  * iTXt is supported.  It is turned off by default, to support old apps
 392  * that malloc the png_text structure instead of calling png_set_text()
 393  * and letting libpng malloc it.  It will be turned on by default in
 394  * libpng-1.3.0.
 395  */
 396
 397 #ifndef PNG_iTXt_SUPPORTED
 398 #  ifndef PNG_READ_iTXt_SUPPORTED
 399 #    define PNG_NO_READ_iTXt
 400 #  endif
 401 #  ifndef PNG_WRITE_iTXt_SUPPORTED
 402 #    define PNG_NO_WRITE_iTXt
 403 #  endif
 404 #endif
 405
 406 /* The following support, added after version 1.0.0, can be turned off here en
 407  * masse by defining PNG_LEGACY_SUPPORTED in case you need binary compatibility
 408  * with old applications that require the length of png_struct and png_info
 409  * to remain unchanged.
 410  */
 411
 412 #ifdef PNG_LEGACY_SUPPORTED
 413 #  define PNG_NO_FREE_ME
 414 #  define PNG_NO_READ_UNKNOWN_CHUNKS
 415 #  define PNG_NO_WRITE_UNKNOWN_CHUNKS
 416 #  define PNG_NO_READ_USER_CHUNKS
 417 #  define PNG_NO_READ_iCCP
 418 #  define PNG_NO_WRITE_iCCP
 419 #  define PNG_NO_READ_iTXt
 420 #  define PNG_NO_WRITE_iTXt
 421 #  define PNG_NO_READ_sCAL
 422 #  define PNG_NO_WRITE_sCAL
 423 #  define PNG_NO_READ_sPLT
 424 #  define PNG_NO_WRITE_sPLT
 425 #  define PNG_NO_INFO_IMAGE
 426 #  define PNG_NO_READ_RGB_TO_GRAY
 427 #  define PNG_NO_READ_USER_TRANSFORM
 428 #  define PNG_NO_WRITE_USER_TRANSFORM
 429 #  define PNG_NO_USER_MEM
 430 #  define PNG_NO_READ_EMPTY_PLTE
 431 #  define PNG_NO_MNG_FEATURES
 432 #  define PNG_NO_FIXED_POINT_SUPPORTED
 433 #endif
 434
 435 /* Ignore attempt to turn off both floating and fixed point support */
 436 #if !defined(PNG_FLOATING_POINT_SUPPORTED) || \
 437     !defined(PNG_NO_FIXED_POINT_SUPPORTED)
 438 #  define PNG_FIXED_POINT_SUPPORTED
 439 #endif
 440
 441 #ifndef PNG_NO_FREE_ME
 442 #  define PNG_FREE_ME_SUPPORTED
 443 #endif
 444
 445 #if defined(PNG_READ_SUPPORTED)
 446
 447 #if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \
 448       !defined(PNG_NO_READ_TRANSFORMS)
 449 #  define PNG_READ_TRANSFORMS_SUPPORTED
 450 #endif
 451
 452 #ifdef PNG_READ_TRANSFORMS_SUPPORTED
 453 #  ifndef PNG_NO_READ_EXPAND
 454 #    define PNG_READ_EXPAND_SUPPORTED
 455 #  endif
 456 #  ifndef PNG_NO_READ_SHIFT
 457 #    define PNG_READ_SHIFT_SUPPORTED
 458 #  endif
 459 #  ifndef PNG_NO_READ_PACK
 460 #    define PNG_READ_PACK_SUPPORTED
 461 #  endif
 462 #  ifndef PNG_NO_READ_BGR
 463 #    define PNG_READ_BGR_SUPPORTED
 464 #  endif
 465 #  ifndef PNG_NO_READ_SWAP
 466 #    define PNG_READ_SWAP_SUPPORTED
 467 #  endif
 468 #  ifndef PNG_NO_READ_PACKSWAP
 469 #    define PNG_READ_PACKSWAP_SUPPORTED
 470 #  endif
 471 #  ifndef PNG_NO_READ_INVERT
 472 #    define PNG_READ_INVERT_SUPPORTED
 473 #  endif
 474 #  ifndef PNG_NO_READ_DITHER
 475 #    define PNG_READ_DITHER_SUPPORTED
 476 #  endif
 477 #  ifndef PNG_NO_READ_BACKGROUND
 478 #    define PNG_READ_BACKGROUND_SUPPORTED
 479 #  endif
 480 #  ifndef PNG_NO_READ_16_TO_8
 481 #    define PNG_READ_16_TO_8_SUPPORTED
 482 #  endif
 483 #  ifndef PNG_NO_READ_FILLER
 484 #    define PNG_READ_FILLER_SUPPORTED
 485 #  endif
 486 #  ifndef PNG_NO_READ_GAMMA
 487 #    define PNG_READ_GAMMA_SUPPORTED
 488 #  endif
 489 #  ifndef PNG_NO_READ_GRAY_TO_RGB
 490 #    define PNG_READ_GRAY_TO_RGB_SUPPORTED
 491 #  endif
 492 #  ifndef PNG_NO_READ_SWAP_ALPHA
 493 #    define PNG_READ_SWAP_ALPHA_SUPPORTED
 494 #  endif
 495 #  ifndef PNG_NO_READ_INVERT_ALPHA
 496 #    define PNG_READ_INVERT_ALPHA_SUPPORTED
 497 #  endif
 498 #  ifndef PNG_NO_READ_STRIP_ALPHA
 499 #    define PNG_READ_STRIP_ALPHA_SUPPORTED
 500 #  endif
 501 #  ifndef PNG_NO_READ_USER_TRANSFORM
 502 #    define PNG_READ_USER_TRANSFORM_SUPPORTED
 503 #  endif
 504 #  ifndef PNG_NO_READ_RGB_TO_GRAY
 505 #    define PNG_READ_RGB_TO_GRAY_SUPPORTED
 506 #  endif
 507 #endif /* PNG_READ_TRANSFORMS_SUPPORTED */
 508
 509 #if !defined(PNG_NO_PROGRESSIVE_READ) && \
 510  !defined(PNG_PROGRESSIVE_READ_NOT_SUPPORTED)  /* if you don't do progressive */
 511 #  define PNG_PROGRESSIVE_READ_SUPPORTED     /* reading.  This is not talking */
 512 #endif                               /* about interlacing capability!  You'll */
 513               /* still have interlacing unless you change the following line: */
 514
 515 #define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */
 516
 517 #ifndef PNG_NO_READ_COMPOSITE_NODIV
 518 #  ifndef PNG_NO_READ_COMPOSITED_NODIV  /* libpng-1.0.x misspelling */
 519 #    define PNG_READ_COMPOSITE_NODIV_SUPPORTED   /* well tested on Intel, SGI */
 520 #  endif
 521 #endif
 522
 523 /* Deprecated, will be removed from version 2.0.0.
 524    Use PNG_MNG_FEATURES_SUPPORTED instead. */
 525 #ifndef PNG_NO_READ_EMPTY_PLTE
 526 #  define PNG_READ_EMPTY_PLTE_SUPPORTED
 527 #endif
 528
 529 #endif /* PNG_READ_SUPPORTED */
 530
 531 #if defined(PNG_WRITE_SUPPORTED)
 532
 533 # if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \
 534     !defined(PNG_NO_WRITE_TRANSFORMS)
 535 #  define PNG_WRITE_TRANSFORMS_SUPPORTED
 536 #endif
 537
 538 #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
 539 #  ifndef PNG_NO_WRITE_SHIFT
 540 #    define PNG_WRITE_SHIFT_SUPPORTED
 541 #  endif
 542 #  ifndef PNG_NO_WRITE_PACK
 543 #    define PNG_WRITE_PACK_SUPPORTED
 544 #  endif
 545 #  ifndef PNG_NO_WRITE_BGR
 546 #    define PNG_WRITE_BGR_SUPPORTED
 547 #  endif
 548 #  ifndef PNG_NO_WRITE_SWAP
 549 #    define PNG_WRITE_SWAP_SUPPORTED
 550 #  endif
 551 #  ifndef PNG_NO_WRITE_PACKSWAP
 552 #    define PNG_WRITE_PACKSWAP_SUPPORTED
 553 #  endif
 554 #  ifndef PNG_NO_WRITE_INVERT
 555 #    define PNG_WRITE_INVERT_SUPPORTED
 556 #  endif
 557 #  ifndef PNG_NO_WRITE_FILLER
 558 #    define PNG_WRITE_FILLER_SUPPORTED   /* same as WRITE_STRIP_ALPHA */
 559 #  endif
 560 #  ifndef PNG_NO_WRITE_SWAP_ALPHA
 561 #    define PNG_WRITE_SWAP_ALPHA_SUPPORTED
 562 #  endif
 563 #  ifndef PNG_NO_WRITE_INVERT_ALPHA
 564 #    define PNG_WRITE_INVERT_ALPHA_SUPPORTED
 565 #  endif
 566 #  ifndef PNG_NO_WRITE_USER_TRANSFORM
 567 #    define PNG_WRITE_USER_TRANSFORM_SUPPORTED
 568 #  endif
 569 #endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */
 570
 571 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
 572     defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
 573 #  ifndef PNG_NO_USER_TRANSFORM_PTR
 574 #    define PNG_USER_TRANSFORM_PTR_SUPPORTED
 575 #  endif
 576 #endif
 577
 578 #define PNG_WRITE_INTERLACING_SUPPORTED  /* not required for PNG-compliant
 579                                             encoders, but can cause trouble
 580                                             if left undefined */
 581
 582 #if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \
 583      defined(PNG_FLOATING_POINT_SUPPORTED)
 584 #  define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
 585 #endif
 586
 587 #ifndef PNG_NO_WRITE_FLUSH
 588 #  define PNG_WRITE_FLUSH_SUPPORTED
 589 #endif
 590
 591 /* Deprecated, see PNG_MNG_FEATURES_SUPPORTED, above */
 592 #ifndef PNG_NO_WRITE_EMPTY_PLTE
 593 #  define PNG_WRITE_EMPTY_PLTE_SUPPORTED
 594 #endif
 595
 596 #endif /* PNG_WRITE_SUPPORTED */
 597
 598 #ifndef PNG_NO_STDIO
 599 #  define PNG_TIME_RFC1123_SUPPORTED
 600 #endif
 601
 602 /* This adds extra functions in pngget.c for accessing data from the
 603  * info pointer (added in version 0.99)
 604  * png_get_image_width()
 605  * png_get_image_height()
 606  * png_get_bit_depth()
 607  * png_get_color_type()
 608  * png_get_compression_type()
 609  * png_get_filter_type()
 610  * png_get_interlace_type()
 611  * png_get_pixel_aspect_ratio()
 612  * png_get_pixels_per_meter()
 613  * png_get_x_offset_pixels()
 614  * png_get_y_offset_pixels()
 615  * png_get_x_offset_microns()
 616  * png_get_y_offset_microns()
 617  */
 618 #ifndef PNG_NO_EASY_ACCESS
 619 #  define PNG_EASY_ACCESS_SUPPORTED
 620 #endif
 621
 622 /* PNG_ASSEMBLER_CODE will be enabled by default in version 1.2.0
 623    even when PNG_USE_PNGVCRD or PNG_USE_PNGGCCRD is not defined */
 624 #if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_ASSEMBLER_CODE)
 625 #  if defined(PNG_USE_PNGVCRD) || defined(PNG_USE_PNGGCCRD)
 626 #    ifndef PNG_ASSEMBLER_CODE_SUPPORTED
 627 #      define PNG_ASSEMBLER_CODE_SUPPORTED
 628 #    endif
 629 #    if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
 630 #      define PNG_MMX_CODE_SUPPORTED
 631 #    endif
 632 #  endif
 633 #endif
 634
 635 /* These are currently experimental features, define them if you want */
 636
 637 /* very little testing */
 638
 639 #ifdef PNG_READ_SUPPORTED
 640 #  ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
 641 #    define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
 642 #  endif
 643 #endif
 644 #ifndef PNG_NO_USER_MEM
 645 #  define PNG_USER_MEM_SUPPORTED
 646 #endif
 647 #ifndef PNG_NO_ZALLOC_ZERO
 648 #  define PNG_ZALLOC_ZERO
 649 #endif
 650
 651
 652 /* This is only for PowerPC big-endian and 680x0 systems */
 653 /* some testing */
 654 /*
 655 #ifdef PNG_READ_SUPPORTED
 656 #  ifndef PNG_PNG_READ_BIG_ENDIAN_SUPPORTED
 657 #    define PNG_READ_BIG_ENDIAN_SUPPORTED
 658 #  endif
 659 #endif
 660 */
 661
 662 /* Buggy compilers (e.g., gcc 2.7.2.2) need this */
 663 /*
 664 #define PNG_NO_POINTER_INDEXING
 665 */
 666
 667 /* These functions are turned off by default, as they will be phased out. */
 668 /*
 669 #define  PNG_USELESS_TESTS_SUPPORTED
 670 #define  PNG_CORRECT_PALETTE_SUPPORTED
 671 */
 672
 673 /* Any chunks you are not interested in, you can undef here.  The
 674  * ones that allocate memory may be expecially important (hIST,
 675  * tEXt, zTXt, tRNS, pCAL).  Others will just save time and make png_info
 676  * a bit smaller.
 677  */
 678
 679 #if defined(PNG_READ_SUPPORTED) && \
 680     !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
 681     !defined(PNG_NO_READ_ANCILLARY_CHUNKS)
 682 #  define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
 683 #endif
 684
 685 #if defined(PNG_WRITE_SUPPORTED) && \
 686     !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
 687     !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS)
 688 #  define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
 689 #endif
 690
 691 #ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
 692
 693 #ifdef PNG_NO_READ_TEXT
 694 #  define PNG_NO_READ_iTXt
 695 #  define PNG_NO_READ_tEXt
 696 #  define PNG_NO_READ_zTXt
 697 #endif
 698 #ifndef PNG_NO_READ_bKGD
 699 #  define PNG_READ_bKGD_SUPPORTED
 700 #  define PNG_bKGD_SUPPORTED
 701 #endif
 702 #ifndef PNG_NO_READ_cHRM
 703 #  define PNG_READ_cHRM_SUPPORTED
 704 #  define PNG_cHRM_SUPPORTED
 705 #endif
 706 #ifndef PNG_NO_READ_gAMA
 707 #  define PNG_READ_gAMA_SUPPORTED
 708 #  define PNG_gAMA_SUPPORTED
 709 #endif
 710 #ifndef PNG_NO_READ_hIST
 711 #  define PNG_READ_hIST_SUPPORTED
 712 #  define PNG_hIST_SUPPORTED
 713 #endif
 714 #ifndef PNG_NO_READ_iCCP
 715 #  define PNG_READ_iCCP_SUPPORTED
 716 #  define PNG_iCCP_SUPPORTED
 717 #endif
 718 #ifndef PNG_NO_READ_iTXt
 719 #  define PNG_READ_iTXt_SUPPORTED
 720 #  define PNG_iTXt_SUPPORTED
 721 #endif
 722 #ifndef PNG_NO_READ_oFFs
 723 #  define PNG_READ_oFFs_SUPPORTED
 724 #  define PNG_oFFs_SUPPORTED
 725 #endif
 726 #ifndef PNG_NO_READ_pCAL
 727 #  define PNG_READ_pCAL_SUPPORTED
 728 #  define PNG_pCAL_SUPPORTED
 729 #endif
 730 #ifndef PNG_NO_READ_sCAL
 731 #  define PNG_READ_sCAL_SUPPORTED
 732 #  define PNG_sCAL_SUPPORTED
 733 #endif
 734 #ifndef PNG_NO_READ_pHYs
 735 #  define PNG_READ_pHYs_SUPPORTED
 736 #  define PNG_pHYs_SUPPORTED
 737 #endif
 738 #ifndef PNG_NO_READ_sBIT
 739 #  define PNG_READ_sBIT_SUPPORTED
 740 #  define PNG_sBIT_SUPPORTED
 741 #endif
 742 #ifndef PNG_NO_READ_sPLT
 743 #  define PNG_READ_sPLT_SUPPORTED
 744 #  define PNG_sPLT_SUPPORTED
 745 #endif
 746 #ifndef PNG_NO_READ_sRGB
 747 #  define PNG_READ_sRGB_SUPPORTED
 748 #  define PNG_sRGB_SUPPORTED
 749 #endif
 750 #ifndef PNG_NO_READ_tEXt
 751 #  define PNG_READ_tEXt_SUPPORTED
 752 #  define PNG_tEXt_SUPPORTED
 753 #endif
 754 #ifndef PNG_NO_READ_tIME
 755 #  define PNG_READ_tIME_SUPPORTED
 756 #  define PNG_tIME_SUPPORTED
 757 #endif
 758 #ifndef PNG_NO_READ_tRNS
 759 #  define PNG_READ_tRNS_SUPPORTED
 760 #  define PNG_tRNS_SUPPORTED
 761 #endif
 762 #ifndef PNG_NO_READ_zTXt
 763 #  define PNG_READ_zTXt_SUPPORTED
 764 #  define PNG_zTXt_SUPPORTED
 765 #endif
 766 #ifndef PNG_NO_READ_UNKNOWN_CHUNKS
 767 #  define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
 768 #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
 769 #    define PNG_UNKNOWN_CHUNKS_SUPPORTED
 770 #  endif
 771 #  ifndef PNG_NO_HANDLE_AS_UNKNOWN
 772 #    define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
 773 #  endif
 774 #endif
 775 #if !defined(PNG_NO_READ_USER_CHUNKS) && \
 776      defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
 777 #  define PNG_READ_USER_CHUNKS_SUPPORTED
 778 #  define PNG_USER_CHUNKS_SUPPORTED
 779 #  ifdef PNG_NO_READ_UNKNOWN_CHUNKS
 780 #    undef PNG_NO_READ_UNKNOWN_CHUNKS
 781 #  endif
 782 #  ifdef PNG_NO_HANDLE_AS_UNKNOWN
 783 #    undef PNG_NO_HANDLE_AS_UNKNOWN
 784 #  endif
 785 #endif
 786 #ifndef PNG_NO_READ_OPT_PLTE
 787 #  define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */
 788 #endif                      /* optional PLTE chunk in RGB and RGBA images */
 789 #if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \
 790     defined(PNG_READ_zTXt_SUPPORTED)
 791 #  define PNG_READ_TEXT_SUPPORTED
 792 #  define PNG_TEXT_SUPPORTED
 793 #endif
 794
 795 #endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */
 796
 797 #ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
 798
 799 #ifdef PNG_NO_WRITE_TEXT
 800 #  define PNG_NO_WRITE_iTXt
 801 #  define PNG_NO_WRITE_tEXt
 802 #  define PNG_NO_WRITE_zTXt
 803 #endif
 804 #ifndef PNG_NO_WRITE_bKGD
 805 #  define PNG_WRITE_bKGD_SUPPORTED
 806 #  ifndef PNG_bKGD_SUPPORTED
 807 #    define PNG_bKGD_SUPPORTED
 808 #  endif
 809 #endif
 810 #ifndef PNG_NO_WRITE_cHRM
 811 #  define PNG_WRITE_cHRM_SUPPORTED
 812 #  ifndef PNG_cHRM_SUPPORTED
 813 #    define PNG_cHRM_SUPPORTED
 814 #  endif
 815 #endif
 816 #ifndef PNG_NO_WRITE_gAMA
 817 #  define PNG_WRITE_gAMA_SUPPORTED
 818 #  ifndef PNG_gAMA_SUPPORTED
 819 #    define PNG_gAMA_SUPPORTED
 820 #  endif
 821 #endif
 822 #ifndef PNG_NO_WRITE_hIST
 823 #  define PNG_WRITE_hIST_SUPPORTED
 824 #  ifndef PNG_hIST_SUPPORTED
 825 #    define PNG_hIST_SUPPORTED
 826 #  endif
 827 #endif
 828 #ifndef PNG_NO_WRITE_iCCP
 829 #  define PNG_WRITE_iCCP_SUPPORTED
 830 #  ifndef PNG_iCCP_SUPPORTED
 831 #    define PNG_iCCP_SUPPORTED
 832 #  endif
 833 #endif
 834 #ifndef PNG_NO_WRITE_iTXt
 835 #  define PNG_WRITE_iTXt_SUPPORTED
 836 #  ifndef PNG_iTXt_SUPPORTED
 837 #    define PNG_iTXt_SUPPORTED
 838 #  endif
 839 #endif
 840 #ifndef PNG_NO_WRITE_oFFs
 841 #  define PNG_WRITE_oFFs_SUPPORTED
 842 #  ifndef PNG_oFFs_SUPPORTED
 843 #    define PNG_oFFs_SUPPORTED
 844 #  endif
 845 #endif
 846 #ifndef PNG_NO_WRITE_pCAL
 847 #  define PNG_WRITE_pCAL_SUPPORTED
 848 #  ifndef PNG_pCAL_SUPPORTED
 849 #    define PNG_pCAL_SUPPORTED
 850 #  endif
 851 #endif
 852 #ifndef PNG_NO_WRITE_sCAL
 853 #  define PNG_WRITE_sCAL_SUPPORTED
 854 #  ifndef PNG_sCAL_SUPPORTED
 855 #    define PNG_sCAL_SUPPORTED
 856 #  endif
 857 #endif
 858 #ifndef PNG_NO_WRITE_pHYs
 859 #  define PNG_WRITE_pHYs_SUPPORTED
 860 #  ifndef PNG_pHYs_SUPPORTED
 861 #    define PNG_pHYs_SUPPORTED
 862 #  endif
 863 #endif
 864 #ifndef PNG_NO_WRITE_sBIT
 865 #  define PNG_WRITE_sBIT_SUPPORTED
 866 #  ifndef PNG_sBIT_SUPPORTED
 867 #    define PNG_sBIT_SUPPORTED
 868 #  endif
 869 #endif
 870 #ifndef PNG_NO_WRITE_sPLT
 871 #  define PNG_WRITE_sPLT_SUPPORTED
 872 #  ifndef PNG_sPLT_SUPPORTED
 873 #    define PNG_sPLT_SUPPORTED
 874 #  endif
 875 #endif
 876 #ifndef PNG_NO_WRITE_sRGB
 877 #  define PNG_WRITE_sRGB_SUPPORTED
 878 #  ifndef PNG_sRGB_SUPPORTED
 879 #    define PNG_sRGB_SUPPORTED
 880 #  endif
 881 #endif
 882 #ifndef PNG_NO_WRITE_tEXt
 883 #  define PNG_WRITE_tEXt_SUPPORTED
 884 #  ifndef PNG_tEXt_SUPPORTED
 885 #    define PNG_tEXt_SUPPORTED
 886 #  endif
 887 #endif
 888 #ifndef PNG_NO_WRITE_tIME
 889 #  define PNG_WRITE_tIME_SUPPORTED
 890 #  ifndef PNG_tIME_SUPPORTED
 891 #    define PNG_tIME_SUPPORTED
 892 #  endif
 893 #endif
 894 #ifndef PNG_NO_WRITE_tRNS
 895 #  define PNG_WRITE_tRNS_SUPPORTED
 896 #  ifndef PNG_tRNS_SUPPORTED
 897 #    define PNG_tRNS_SUPPORTED
 898 #  endif
 899 #endif
 900 #ifndef PNG_NO_WRITE_zTXt
 901 #  define PNG_WRITE_zTXt_SUPPORTED
 902 #  ifndef PNG_zTXt_SUPPORTED
 903 #    define PNG_zTXt_SUPPORTED
 904 #  endif
 905 #endif
 906 #ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS
 907 #  define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
 908 #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
 909 #    define PNG_UNKNOWN_CHUNKS_SUPPORTED
 910 #  endif
 911 #  ifndef PNG_NO_HANDLE_AS_UNKNOWN
 912 #     ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
 913 #       define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
 914 #     endif
 915 #  endif
 916 #endif
 917 #if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
 918     defined(PNG_WRITE_zTXt_SUPPORTED)
 919 #  define PNG_WRITE_TEXT_SUPPORTED
 920 #  ifndef PNG_TEXT_SUPPORTED
 921 #    define PNG_TEXT_SUPPORTED
 922 #  endif
 923 #endif
 924
 925 #endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */
 926
 927 /* Turn this off to disable png_read_png() and
 928  * png_write_png() and leave the row_pointers member
 929  * out of the info structure.
 930  */
 931 #ifndef PNG_NO_INFO_IMAGE
 932 #  define PNG_INFO_IMAGE_SUPPORTED
 933 #endif
 934
 935 /* need the time information for reading tIME chunks */
 936 #if defined(PNG_tIME_SUPPORTED)
 937 #  if !defined(_WIN32_WCE)
 938      /* "time.h" functions are not supported on WindowsCE */
 939 #    include <time.h>
 940 #  endif
 941 #endif
 942
 943 /* Some typedefs to get us started.  These should be safe on most of the
 944  * common platforms.  The typedefs should be at least as large as the
 945  * numbers suggest (a png_uint_32 must be at least 32 bits long), but they
 946  * don't have to be exactly that size.  Some compilers dislike passing
 947  * unsigned shorts as function parameters, so you may be better off using
 948  * unsigned int for png_uint_16.  Likewise, for 64-bit systems, you may
 949  * want to have unsigned int for png_uint_32 instead of unsigned long.
 950  */
 951
 952 typedef unsigned int png_uint_32;
 953 typedef int png_int_32;
 954 typedef unsigned short png_uint_16;
 955 typedef short png_int_16;
 956 typedef unsigned char png_byte;
 957
 958 /* This is usually size_t.  It is typedef'ed just in case you need it to
 959    change (I'm not sure if you will or not, so I thought I'd be safe) */
 960 typedef size_t png_size_t;
 961
 962 /* The following is needed for medium model support.  It cannot be in the
 963  * PNG_INTERNAL section.  Needs modification for other compilers besides
 964  * MSC.  Model independent support declares all arrays and pointers to be
 965  * large using the far keyword.  The zlib version used must also support
 966  * model independent data.  As of version zlib 1.0.4, the necessary changes
 967  * have been made in zlib.  The USE_FAR_KEYWORD define triggers other
 968  * changes that are needed. (Tim Wegner)
 969  */
 970
 971 /* Separate compiler dependencies (problem here is that zlib.h always
 972    defines FAR. (SJT) */
 973 #ifdef __BORLANDC__
 974 #  if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)
 975 #    define LDATA 1
 976 #  else
 977 #    define LDATA 0
 978 #  endif
 979    /* GRR:  why is Cygwin in here?  Cygwin is not Borland C... */
 980 #  if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)
 981 #    define PNG_MAX_MALLOC_64K
 982 #    if (LDATA != 1)
 983 #      ifndef FAR
 984 #        define FAR __far
 985 #      endif
 986 #      define USE_FAR_KEYWORD
 987 #    endif   /* LDATA != 1 */
 988      /* Possibly useful for moving data out of default segment.
 989       * Uncomment it if you want. Could also define FARDATA as
 990       * const if your compiler supports it. (SJT)
 991 #    define FARDATA FAR
 992       */
 993 #  endif  /* __WIN32__, __FLAT__, __CYGWIN__ */
 994 #endif   /* __BORLANDC__ */
 995
 996
 997 /* Suggest testing for specific compiler first before testing for
 998  * FAR.  The Watcom compiler defines both __MEDIUM__ and M_I86MM,
 999  * making reliance oncertain keywords suspect. (SJT)
1000  */
1001
1002 /* MSC Medium model */
1003 #if defined(FAR)
1004 #  if defined(M_I86MM)
1005 #    define USE_FAR_KEYWORD
1006 #    define FARDATA FAR
1007 #    include <dos.h>
1008 #  endif
1009 #endif
1010
1011 /* SJT: default case */
1012 #ifndef FAR
1013 #  define FAR
1014 #endif
1015
1016 /* At this point FAR is always defined */
1017 #ifndef FARDATA
1018 #  define FARDATA
1019 #endif
1020
1021 /* Typedef for floating-point numbers that are converted
1022    to fixed-point with a multiple of 100,000, e.g., int_gamma */
1023 typedef png_int_32 png_fixed_point;
1024
1025 /* Add typedefs for pointers */
1026 typedef void            FAR * png_voidp;
1027 typedef png_byte        FAR * png_bytep;
1028 typedef png_uint_32     FAR * png_uint_32p;
1029 typedef png_int_32      FAR * png_int_32p;
1030 typedef png_uint_16     FAR * png_uint_16p;
1031 typedef png_int_16      FAR * png_int_16p;
1032 typedef PNG_CONST char  FAR * png_const_charp;
1033 typedef char            FAR * png_charp;
1034 typedef png_fixed_point FAR * png_fixed_point_p;
1035
1036 #ifndef PNG_NO_STDIO
1037 #if defined(_WIN32_WCE)
1038 typedef HANDLE                png_FILE_p;
1039 #else
1040 typedef FILE                * png_FILE_p;
1041 #endif
1042 #endif
1043
1044 #ifdef PNG_FLOATING_POINT_SUPPORTED
1045 typedef double          FAR * png_doublep;
1046 #endif
1047
1048 /* Pointers to pointers; i.e. arrays */
1049 typedef png_byte        FAR * FAR * png_bytepp;
1050 typedef png_uint_32     FAR * FAR * png_uint_32pp;
1051 typedef png_int_32      FAR * FAR * png_int_32pp;
1052 typedef png_uint_16     FAR * FAR * png_uint_16pp;
1053 typedef png_int_16      FAR * FAR * png_int_16pp;
1054 typedef PNG_CONST char  FAR * FAR * png_const_charpp;
1055 typedef char            FAR * FAR * png_charpp;
1056 typedef png_fixed_point FAR * FAR * png_fixed_point_pp;
1057 #ifdef PNG_FLOATING_POINT_SUPPORTED
1058 typedef double          FAR * FAR * png_doublepp;
1059 #endif
1060
1061 /* Pointers to pointers to pointers; i.e., pointer to array */
1062 typedef char            FAR * FAR * FAR * png_charppp;
1063
1064 /* libpng typedefs for types in zlib. If zlib changes
1065  * or another compression library is used, then change these.
1066  * Eliminates need to change all the source files.
1067  */
1068 typedef charf *         png_zcharp;
1069 typedef charf * FAR *   png_zcharpp;
1070 typedef z_stream FAR *  png_zstreamp;
1071
1072 /*
1073  * Define PNG_BUILD_DLL if the module being built is a Windows
1074  * LIBPNG DLL.
1075  *
1076  * Define PNG_USE_DLL if you want to *link* to the Windows LIBPNG DLL.
1077  * It is equivalent to Microsoft predefined macro _DLL that is
1078  * automatically defined when you compile using the share
1079  * version of the CRT (C Run-Time library)
1080  *
1081  * The cygwin mods make this behavior a little different:
1082  * Define PNG_BUILD_DLL if you are building a dll for use with cygwin
1083  * Define PNG_STATIC if you are building a static library for use with cygwin,
1084  *   -or- if you are building an application that you want to link to the
1085  *   static library.
1086  * PNG_USE_DLL is defined by default (no user action needed) unless one of
1087  *   the other flags is defined.
1088  */
1089
1090 #if !defined(PNG_DLL) && (defined(PNG_BUILD_DLL) || defined(PNG_USE_DLL))
1091 #  define PNG_DLL
1092 #endif
1093 /* If CYGWIN, then disallow GLOBAL ARRAYS unless building a static lib.
1094  * When building a static lib, default to no GLOBAL ARRAYS, but allow
1095  * command-line override
1096  */
1097 #if defined(__CYGWIN__)
1098 #  if !defined(PNG_STATIC)
1099 #    if defined(PNG_USE_GLOBAL_ARRAYS)
1100 #      undef PNG_USE_GLOBAL_ARRAYS
1101 #    endif
1102 #    if !defined(PNG_USE_LOCAL_ARRAYS)
1103 #      define PNG_USE_LOCAL_ARRAYS
1104 #    endif
1105 #  else
1106 #    if defined(PNG_USE_LOCAL_ARRAYS) || defined(PNG_NO_GLOBAL_ARRAYS)
1107 #      if defined(PNG_USE_GLOBAL_ARRAYS)
1108 #        undef PNG_USE_GLOBAL_ARRAYS
1109 #      endif
1110 #    endif
1111 #  endif
1112 #  if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1113 #    define PNG_USE_LOCAL_ARRAYS
1114 #  endif
1115 #endif
1116
1117 /* Do not use global arrays (helps with building DLL's)
1118  * They are no longer used in libpng itself, since version 1.0.5c,
1119  * but might be required for some pre-1.0.5c applications.
1120  */
1121 #if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1122 #  if defined(PNG_NO_GLOBAL_ARRAYS) || (defined(__GNUC__) && defined(PNG_DLL))
1123 #    define PNG_USE_LOCAL_ARRAYS
1124 #  else
1125 #    define PNG_USE_GLOBAL_ARRAYS
1126 #  endif
1127 #endif
1128
1129
1130 #ifndef PNGAPI
1131
1132 #if defined(__MINGW32__) || defined(__CYGWIN__) && !defined(PNG_MODULEDEF)
1133 #  ifndef PNG_NO_MODULEDEF
1134 #    define PNG_NO_MODULEDEF
1135 #  endif
1136 #endif
1137
1138 #if !defined(PNG_IMPEXP) && defined(PNG_BUILD_DLL) && !defined(PNG_NO_MODULEDEF)
1139 #  define PNG_IMPEXP
1140 #endif
1141
1142 #if defined(PNG_DLL) || defined(_DLL) || defined(__DLL__ ) || \
1143     (( defined(_Windows) || defined(_WINDOWS) || \
1144        defined(WIN32) || defined(_WIN32) || defined(__WIN32__) \
1145           ) && !defined(__CYGWIN__))
1146
1147 #  if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
1148 #    define PNGAPI __cdecl
1149 #  else
1150 #    define PNGAPI _cdecl
1151 #  endif
1152
1153 #  if !defined(PNG_IMPEXP) && (!defined(PNG_DLL) || \
1154        0 /* WINCOMPILER_WITH_NO_SUPPORT_FOR_DECLIMPEXP */)
1155 #     define PNG_IMPEXP
1156 #  endif
1157
1158 #  if !defined(PNG_IMPEXP)
1159
1160 #     define PNG_EXPORT_TYPE1(type,symbol)  PNG_IMPEXP type PNGAPI symbol
1161 #     define PNG_EXPORT_TYPE2(type,symbol)  type PNG_IMPEXP PNGAPI symbol
1162
1163       /* Borland/Microsoft */
1164 #     if defined(_MSC_VER) || defined(__BORLANDC__)
1165 #        if (_MSC_VER >= 800) || (__BORLANDC__ >= 0x500)
1166 #           define PNG_EXPORT PNG_EXPORT_TYPE1
1167 #        else
1168 #           define PNG_EXPORT PNG_EXPORT_TYPE2
1169 #           if defined(PNG_BUILD_DLL)
1170 #              define PNG_IMPEXP __export
1171 #           else
1172 #              define PNG_IMPEXP /*__import*/ /* doesn't exist AFAIK in
1173                                                  VC++*/
1174 #           endif                             /* Exists in Borland C++ for
1175                                                  C++ classes (== huge) */
1176 #        endif
1177 #     endif
1178
1179 #     if !defined(PNG_IMPEXP)
1180 #        if defined(PNG_BUILD_DLL)
1181 #           define PNG_IMPEXP __declspec(dllexport)
1182 #        else
1183 #           define PNG_IMPEXP __declspec(dllimport)
1184 #        endif
1185 #     endif
1186 #  endif  /* PNG_IMPEXP */
1187 #else /* !(DLL || non-cygwin WINDOWS) */
1188 #  if defined(__CYGWIN__) && !defined(PNG_DLL)
1189 #    if !defined(PNG_IMPEXP)
1190 #      define PNG_IMPEXP
1191 #    endif
1192 #    define PNGAPI __cdecl
1193 #  else
1194 #    if 0 /* ... other platforms, with other meanings */
1195 #    else
1196 #       define PNGAPI
1197 #       define PNG_IMPEXP
1198 #    endif
1199 #  endif
1200 #endif
1201 #endif
1202
1203 #ifndef PNGAPI
1204 #  define PNGAPI
1205 #endif
1206 #ifndef PNG_IMPEXP
1207 #  define PNG_IMPEXP
1208 #endif
1209
1210 #ifndef PNG_EXPORT
1211 #  define PNG_EXPORT(type,symbol) PNG_IMPEXP type PNGAPI symbol
1212 #endif
1213
1214 #ifdef PNG_USE_GLOBAL_ARRAYS
1215 #  ifndef PNG_EXPORT_VAR
1216 #    define PNG_EXPORT_VAR(type) extern PNG_IMPEXP type
1217 #  endif
1218 #endif
1219
1220 /* User may want to use these so they are not in PNG_INTERNAL. Any library
1221  * functions that are passed far data must be model independent.
1222  */
1223
1224 #ifndef PNG_ABORT
1225 #  define PNG_ABORT() abort()
1226 #endif
1227
1228 #ifdef PNG_SETJMP_SUPPORTED
1229 #  define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf)
1230 #else
1231 #  define png_jmpbuf(png_ptr) \
1232    (LIBPNG_WAS_COMPILED_WITH__PNG_SETJMP_NOT_SUPPORTED)
1233 #endif
1234
1235 #if defined(USE_FAR_KEYWORD)  /* memory model independent fns */
1236 /* use this to make far-to-near assignments */
1237 #  define CHECK   1
1238 #  define NOCHECK 0
1239 #  define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK))
1240 #  define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK))
1241 #  define png_strcpy _fstrcpy
1242 #  define png_strlen _fstrlen
1243 #  define png_memcmp _fmemcmp      /* SJT: added */
1244 #  define png_memcpy _fmemcpy
1245 #  define png_memset _fmemset
1246 #else /* use the usual functions */
1247 #  define CVT_PTR(ptr)         (ptr)
1248 #  define CVT_PTR_NOCHECK(ptr) (ptr)
1249 #  define png_strcpy strcpy
1250 #  define png_strlen strlen
1251 #  define png_memcmp memcmp     /* SJT: added */
1252 #  define png_memcpy memcpy
1253 #  define png_memset memset
1254 #endif
1255 /* End of memory model independent support */
1256
1257 /* Just a little check that someone hasn't tried to define something
1258  * contradictory.
1259  */
1260 #if (PNG_ZBUF_SIZE > 65536) && defined(PNG_MAX_MALLOC_64K)
1261 #  undef PNG_ZBUF_SIZE
1262 #  define PNG_ZBUF_SIZE 65536
1263 #endif
1264
1265 #ifdef PNG_READ_SUPPORTED
1266 /* Prior to libpng-1.0.9, this block was in pngasmrd.h */
1267 #if defined(PNG_INTERNAL)
1268
1269 /* These are the default thresholds before the MMX code kicks in; if either
1270  * rowbytes or bitdepth is below the threshold, plain C code is used.  These
1271  * can be overridden at runtime via the png_set_mmx_thresholds() call in
1272  * libpng 1.2.0 and later.  The values below were chosen by Intel.
1273  */
1274
1275 #ifndef PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT
1276 #  define PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT  128  /*  >=  */
1277 #endif
1278 #ifndef PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT
1279 #  define PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT  9    /*  >=  */
1280 #endif
1281
1282 /* Set this in the makefile for VC++ on Pentium, not here. */
1283 /* Platform must be Pentium.  Makefile must assemble and load pngvcrd.c .
1284  * MMX will be detected at run time and used if present.
1285  */
1286 #ifdef PNG_USE_PNGVCRD
1287 #  define PNG_HAVE_ASSEMBLER_COMBINE_ROW
1288 #  define PNG_HAVE_ASSEMBLER_READ_INTERLACE
1289 #  define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
1290 #endif
1291
1292 /* Set this in the makefile for gcc/as on Pentium, not here. */
1293 /* Platform must be Pentium.  Makefile must assemble and load pnggccrd.c .
1294  * MMX will be detected at run time and used if present.
1295  */
1296 #ifdef PNG_USE_PNGGCCRD
1297 #  define PNG_HAVE_ASSEMBLER_COMBINE_ROW
1298 #  define PNG_HAVE_ASSEMBLER_READ_INTERLACE
1299 #  define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
1300 #endif
1301 /* - see pnggccrd.c for info about what is currently enabled */
1302
1303 #endif /* PNG_INTERNAL */
1304 #endif /* PNG_READ_SUPPORTED */
1305
1306 #endif /* PNGCONF_H */
1307