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/* pngconf.h - machine configurable file for libpng
2
 *
3
 * libpng 1.2.5 - October 3, 2002
4
 * For conditions of distribution and use, see copyright notice in png.h
5
 * Copyright (c) 1998-2002 Glenn Randers-Pehrson
6
 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
7
 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
8
 */
9
 
10
/* Any machine specific code is near the front of this file, so if you
11
 * are configuring libpng for a machine, you may want to read the section
12
 * starting here down to where it starts to typedef png_color, png_text,
13
 * and png_info.
14
 */
15
 
16
#ifndef PNGCONF_H
17
#define PNGCONF_H
18
 
19
/* This is the size of the compression buffer, and thus the size of
20
 * an IDAT chunk.  Make this whatever size you feel is best for your
21
 * machine.  One of these will be allocated per png_struct.  When this
22
 * is full, it writes the data to the disk, and does some other
23
 * calculations.  Making this an extremely small size will slow
24
 * the library down, but you may want to experiment to determine
25
 * where it becomes significant, if you are concerned with memory
26
 * usage.  Note that zlib allocates at least 32Kb also.  For readers,
27
 * this describes the size of the buffer available to read the data in.
28
 * Unless this gets smaller than the size of a row (compressed),
29
 * it should not make much difference how big this is.
30
 */
31
 
32
#ifndef PNG_ZBUF_SIZE
33
#  define PNG_ZBUF_SIZE 8192
34
#endif
35
 
36
/* Enable if you want a write-only libpng */
37
 
38
#ifndef PNG_NO_READ_SUPPORTED
39
#  define PNG_READ_SUPPORTED
40
#endif
41
 
42
/* Enable if you want a read-only libpng */
43
 
44
#ifndef PNG_NO_WRITE_SUPPORTED
45
#  define PNG_WRITE_SUPPORTED
46
#endif
47
 
48
/* Enabled by default in 1.2.0.  You can disable this if you don't need to
49
   support PNGs that are embedded in MNG datastreams */
50
#if !defined(PNG_1_0_X) && !defined(PNG_NO_MNG_FEATURES)
51
#  ifndef PNG_MNG_FEATURES_SUPPORTED
52
#    define PNG_MNG_FEATURES_SUPPORTED
53
#  endif
54
#endif
55
 
56
#ifndef PNG_NO_FLOATING_POINT_SUPPORTED
57
#  ifndef PNG_FLOATING_POINT_SUPPORTED
58
#    define PNG_FLOATING_POINT_SUPPORTED
59
#  endif
60
#endif
61
 
62
/* If you are running on a machine where you cannot allocate more
63
 * than 64K of memory at once, uncomment this.  While libpng will not
64
 * normally need that much memory in a chunk (unless you load up a very
65
 * large file), zlib needs to know how big of a chunk it can use, and
66
 * libpng thus makes sure to check any memory allocation to verify it
67
 * will fit into memory.
68
#define PNG_MAX_MALLOC_64K
69
 */
70
#if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
71
#  define PNG_MAX_MALLOC_64K
72
#endif
73
 
74
/* Special munging to support doing things the 'cygwin' way:
75
 * 'Normal' png-on-win32 defines/defaults:
76
 *   PNG_BUILD_DLL -- building dll
77
 *   PNG_USE_DLL   -- building an application, linking to dll
78
 *   (no define)   -- building static library, or building an
79
 *                    application and linking to the static lib
80
 * 'Cygwin' defines/defaults:
81
 *   PNG_BUILD_DLL -- (ignored) building the dll
82
 *   (no define)   -- (ignored) building an application, linking to the dll
83
 *   PNG_STATIC    -- (ignored) building the static lib, or building an
84
 *                    application that links to the static lib.
85
 *   ALL_STATIC    -- (ignored) building various static libs, or building an
86
 *                    application that links to the static libs.
87
 * Thus,
88
 * a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and
89
 * this bit of #ifdefs will define the 'correct' config variables based on
90
 * that. If a cygwin user *wants* to define 'PNG_USE_DLL' that's okay, but
91
 * unnecessary.
92
 *
93
 * Also, the precedence order is:
94
 *   ALL_STATIC (since we can't #undef something outside our namespace)
95
 *   PNG_BUILD_DLL
96
 *   PNG_STATIC
97
 *   (nothing) == PNG_USE_DLL
98
 *
99
 * CYGWIN (2002-01-20): The preceding is now obsolete. With the advent
100
 *   of auto-import in binutils, we no longer need to worry about
101
 *   __declspec(dllexport) / __declspec(dllimport) and friends.  Therefore,
102
 *   we don't need to worry about PNG_STATIC or ALL_STATIC when it comes
103
 *   to __declspec() stuff.  However, we DO need to worry about
104
 *   PNG_BUILD_DLL and PNG_STATIC because those change some defaults
105
 *   such as CONSOLE_IO and whether GLOBAL_ARRAYS are allowed.
106
 */
107
#if defined(__CYGWIN__)
108
#  if defined(ALL_STATIC)
109
#    if defined(PNG_BUILD_DLL)
110
#      undef PNG_BUILD_DLL
111
#    endif
112
#    if defined(PNG_USE_DLL)
113
#      undef PNG_USE_DLL
114
#    endif
115
#    if defined(PNG_DLL)
116
#      undef PNG_DLL
117
#    endif
118
#    if !defined(PNG_STATIC)
119
#      define PNG_STATIC
120
#    endif
121
#  else
122
#    if defined (PNG_BUILD_DLL)
123
#      if defined(PNG_STATIC)
124
#        undef PNG_STATIC
125
#      endif
126
#      if defined(PNG_USE_DLL)
127
#        undef PNG_USE_DLL
128
#      endif
129
#      if !defined(PNG_DLL)
130
#        define PNG_DLL
131
#      endif
132
#    else
133
#      if defined(PNG_STATIC)
134
#        if defined(PNG_USE_DLL)
135
#          undef PNG_USE_DLL
136
#        endif
137
#        if defined(PNG_DLL)
138
#          undef PNG_DLL
139
#        endif
140
#      else
141
#        if !defined(PNG_USE_DLL)
142
#          define PNG_USE_DLL
143
#        endif
144
#        if !defined(PNG_DLL)
145
#          define PNG_DLL
146
#        endif
147
#      endif  
148
#    endif  
149
#  endif
150
#endif
151
 
152
/* This protects us against compilers that run on a windowing system
153
 * and thus don't have or would rather us not use the stdio types:
154
 * stdin, stdout, and stderr.  The only one currently used is stderr
155
 * in png_error() and png_warning().  #defining PNG_NO_CONSOLE_IO will
156
 * prevent these from being compiled and used. #defining PNG_NO_STDIO
157
 * will also prevent these, plus will prevent the entire set of stdio
158
 * macros and functions (FILE *, printf, etc.) from being compiled and used,
159
 * unless (PNG_DEBUG > 0) has been #defined.
160
 *
161
 * #define PNG_NO_CONSOLE_IO
162
 * #define PNG_NO_STDIO
163
 */
164
 
165
#if defined(_WIN32_WCE)
166
#  include <windows.h>
167
   /* Console I/O functions are not supported on WindowsCE */
168
#  define PNG_NO_CONSOLE_IO
169
#  ifdef PNG_DEBUG
170
#    undef PNG_DEBUG
171
#  endif
172
#endif
173
 
174
#ifdef PNG_BUILD_DLL
175
#  ifndef PNG_CONSOLE_IO_SUPPORTED
176
#    ifndef PNG_NO_CONSOLE_IO
177
#      define PNG_NO_CONSOLE_IO
178
#    endif
179
#  endif
180
#endif
181
 
182
#  ifdef PNG_NO_STDIO
183
#    ifndef PNG_NO_CONSOLE_IO
184
#      define PNG_NO_CONSOLE_IO
185
#    endif
186
#    ifdef PNG_DEBUG
187
#      if (PNG_DEBUG > 0)
188
#        include <stdio.h>
189
#      endif
190
#    endif
191
#  else
192
#    if !defined(_WIN32_WCE)
193
/* "stdio.h" functions are not supported on WindowsCE */
194
#      include <stdio.h>
195
#    endif
196
#  endif
197
 
198
/* This macro protects us against machines that don't have function
199
 * prototypes (ie K&R style headers).  If your compiler does not handle
200
 * function prototypes, define this macro and use the included ansi2knr.
201
 * I've always been able to use _NO_PROTO as the indicator, but you may
202
 * need to drag the empty declaration out in front of here, or change the
203
 * ifdef to suit your own needs.
204
 */
205
#ifndef PNGARG
206
 
207
#ifdef OF /* zlib prototype munger */
208
#  define PNGARG(arglist) OF(arglist)
209
#else
210
 
211
#ifdef _NO_PROTO
212
#  define PNGARG(arglist) ()
213
#  ifndef PNG_TYPECAST_NULL
214
#     define PNG_TYPECAST_NULL
215
#  endif
216
#else
217
#  define PNGARG(arglist) arglist
218
#endif /* _NO_PROTO */
219
 
220
#endif /* OF */
221
 
222
#endif /* PNGARG */
223
 
224
/* Try to determine if we are compiling on a Mac.  Note that testing for
225
 * just __MWERKS__ is not good enough, because the Codewarrior is now used
226
 * on non-Mac platforms.
227
 */
228
#ifndef MACOS
229
#  if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
230
      defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC)
231
#    define MACOS
232
#  endif
233
#endif
234
 
235
/* enough people need this for various reasons to include it here */
236
#if !defined(MACOS) && !defined(RISCOS) && !defined(_WIN32_WCE)
237
#  include <sys/types.h>
238
#endif
239
 
240
#if !defined(PNG_SETJMP_NOT_SUPPORTED) && !defined(PNG_NO_SETJMP_SUPPORTED)
241
//#  define PNG_SETJMP_SUPPORTED
242
#endif
243
 
244
#ifdef PNG_SETJMP_SUPPORTED
245
/* This is an attempt to force a single setjmp behaviour on Linux.  If
246
 * the X config stuff didn't define _BSD_SOURCE we wouldn't need this.
247
 */
248
 
249
#  ifdef __linux__
250
#    ifdef _BSD_SOURCE
251
#      define PNG_SAVE_BSD_SOURCE
252
#      undef _BSD_SOURCE
253
#    endif
254
#    ifdef _SETJMP_H
255
      __png.h__ already includes setjmp.h;
256
      __dont__ include it again.;
257
#    endif
258
#  endif /* __linux__ */
259
 
260
   /* include setjmp.h for error handling */
261
//#  include <setjmp.h>
262
 
263
#  ifdef __linux__
264
#    ifdef PNG_SAVE_BSD_SOURCE
265
#      define _BSD_SOURCE
266
#      undef PNG_SAVE_BSD_SOURCE
267
#    endif
268
#  endif /* __linux__ */
269
#endif /* PNG_SETJMP_SUPPORTED */
270
 
271
#ifdef BSD
272
#  include <strings.h>
273
#else
274
#  include <string.h>
275
#endif
276
 
277
/* Other defines for things like memory and the like can go here.  */
278
#ifdef PNG_INTERNAL
279
 
280
#include <stdlib.h>
281
 
282
/* The functions exported by PNG_EXTERN are PNG_INTERNAL functions, which
283
 * aren't usually used outside the library (as far as I know), so it is
284
 * debatable if they should be exported at all.  In the future, when it is
285
 * possible to have run-time registry of chunk-handling functions, some of
286
 * these will be made available again.
287
#define PNG_EXTERN extern
288
 */
289
#define PNG_EXTERN
290
 
291
/* Other defines specific to compilers can go here.  Try to keep
292
 * them inside an appropriate ifdef/endif pair for portability.
293
 */
294
 
295
#if defined(PNG_FLOATING_POINT_SUPPORTED)
296
#  if defined(MACOS)
297
     /* We need to check that <math.h> hasn't already been included earlier
298
      * as it seems it doesn't agree with <fp.h>, yet we should really use
299
      * <fp.h> if possible.
300
      */
301
#    if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__)
302
#      include <fp.h>
303
#    endif
304
#  else
305
#    include <math.h>
306
#  endif
307
#  if defined(_AMIGA) && defined(__SASC) && defined(_M68881)
308
     /* Amiga SAS/C: We must include builtin FPU functions when compiling using
309
      * MATH=68881
310
      */
311
#    include <m68881.h>
312
#  endif
313
#endif
314
 
315
/* Codewarrior on NT has linking problems without this. */
316
#if (defined(__MWERKS__) && defined(WIN32)) || defined(__STDC__)
317
#  define PNG_ALWAYS_EXTERN
318
#endif
319
 
320
/* For some reason, Borland C++ defines memcmp, etc. in mem.h, not
321
 * stdlib.h like it should (I think).  Or perhaps this is a C++
322
 * "feature"?
323
 */
324
#ifdef __TURBOC__
325
#  include <mem.h>
326
#  include "alloc.h"
327
#endif
328
 
329
#if defined(_MSC_VER) && (defined(WIN32) || defined(_Windows) || \
330
    defined(_WINDOWS) || defined(_WIN32) || defined(__WIN32__))
331
#  include <malloc.h>
332
#endif
333
 
334
/* This controls how fine the dithering gets.  As this allocates
335
 * a largish chunk of memory (32K), those who are not as concerned
336
 * with dithering quality can decrease some or all of these.
337
 */
338
#ifndef PNG_DITHER_RED_BITS
339
#  define PNG_DITHER_RED_BITS 5
340
#endif
341
#ifndef PNG_DITHER_GREEN_BITS
342
#  define PNG_DITHER_GREEN_BITS 5
343
#endif
344
#ifndef PNG_DITHER_BLUE_BITS
345
#  define PNG_DITHER_BLUE_BITS 5
346
#endif
347
 
348
/* This controls how fine the gamma correction becomes when you
349
 * are only interested in 8 bits anyway.  Increasing this value
350
 * results in more memory being used, and more pow() functions
351
 * being called to fill in the gamma tables.  Don't set this value
352
 * less then 8, and even that may not work (I haven't tested it).
353
 */
354
 
355
#ifndef PNG_MAX_GAMMA_8
356
#  define PNG_MAX_GAMMA_8 11
357
#endif
358
 
359
/* This controls how much a difference in gamma we can tolerate before
360
 * we actually start doing gamma conversion.
361
 */
362
#ifndef PNG_GAMMA_THRESHOLD
363
#  define PNG_GAMMA_THRESHOLD 0.05
364
#endif
365
 
366
#endif /* PNG_INTERNAL */
367
 
368
/* The following uses const char * instead of char * for error
369
 * and warning message functions, so some compilers won't complain.
370
 * If you do not want to use const, define PNG_NO_CONST here.
371
 */
372
 
373
#ifndef PNG_NO_CONST
374
#  define PNG_CONST const
375
#else
376
#  define PNG_CONST
377
#endif
378
 
379
/* The following defines give you the ability to remove code from the
380
 * library that you will not be using.  I wish I could figure out how to
381
 * automate this, but I can't do that without making it seriously hard
382
 * on the users.  So if you are not using an ability, change the #define
383
 * to and #undef, and that part of the library will not be compiled.  If
384
 * your linker can't find a function, you may want to make sure the
385
 * ability is defined here.  Some of these depend upon some others being
386
 * defined.  I haven't figured out all the interactions here, so you may
387
 * have to experiment awhile to get everything to compile.  If you are
388
 * creating or using a shared library, you probably shouldn't touch this,
389
 * as it will affect the size of the structures, and this will cause bad
390
 * things to happen if the library and/or application ever change.
391
 */
392
 
393
/* Any features you will not be using can be undef'ed here */
394
 
395
/* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user
396
 * to turn it off with "*TRANSFORMS_NOT_SUPPORTED" or *PNG_NO_*_TRANSFORMS
397
 * on the compile line, then pick and choose which ones to define without
398
 * having to edit this file. It is safe to use the *TRANSFORMS_NOT_SUPPORTED
399
 * if you only want to have a png-compliant reader/writer but don't need
400
 * any of the extra transformations.  This saves about 80 kbytes in a
401
 * typical installation of the library. (PNG_NO_* form added in version
402
 * 1.0.1c, for consistency)
403
 */
404
 
405
/* The size of the png_text structure changed in libpng-1.0.6 when
406
 * iTXt is supported.  It is turned off by default, to support old apps
407
 * that malloc the png_text structure instead of calling png_set_text()
408
 * and letting libpng malloc it.  It will be turned on by default in
409
 * libpng-1.3.0.
410
 */
411
 
412
#ifndef PNG_iTXt_SUPPORTED
413
#  if !defined(PNG_READ_iTXt_SUPPORTED) && !defined(PNG_NO_READ_iTXt)
414
#    define PNG_NO_READ_iTXt
415
#  endif
416
#  if !defined(PNG_WRITE_iTXt_SUPPORTED) && !defined(PNG_NO_WRITE_iTXt)
417
#    define PNG_NO_WRITE_iTXt
418
#  endif
419
#endif
420
 
421
/* The following support, added after version 1.0.0, can be turned off here en
422
 * masse by defining PNG_LEGACY_SUPPORTED in case you need binary compatibility
423
 * with old applications that require the length of png_struct and png_info
424
 * to remain unchanged.
425
 */
426
 
427
#ifdef PNG_LEGACY_SUPPORTED
428
#  define PNG_NO_FREE_ME
429
#  define PNG_NO_READ_UNKNOWN_CHUNKS
430
#  define PNG_NO_WRITE_UNKNOWN_CHUNKS
431
#  define PNG_NO_READ_USER_CHUNKS
432
#  define PNG_NO_READ_iCCP
433
#  define PNG_NO_WRITE_iCCP
434
#  define PNG_NO_READ_iTXt
435
#  define PNG_NO_WRITE_iTXt
436
#  define PNG_NO_READ_sCAL
437
#  define PNG_NO_WRITE_sCAL
438
#  define PNG_NO_READ_sPLT
439
#  define PNG_NO_WRITE_sPLT
440
#  define PNG_NO_INFO_IMAGE
441
#  define PNG_NO_READ_RGB_TO_GRAY
442
#  define PNG_NO_READ_USER_TRANSFORM
443
#  define PNG_NO_WRITE_USER_TRANSFORM
444
#  define PNG_NO_USER_MEM
445
#  define PNG_NO_READ_EMPTY_PLTE
446
#  define PNG_NO_MNG_FEATURES
447
#  define PNG_NO_FIXED_POINT_SUPPORTED
448
#endif
449
 
450
/* Ignore attempt to turn off both floating and fixed point support */
451
#if !defined(PNG_FLOATING_POINT_SUPPORTED) || \
452
    !defined(PNG_NO_FIXED_POINT_SUPPORTED)
453
#  define PNG_FIXED_POINT_SUPPORTED
454
#endif
455
 
456
#ifndef PNG_NO_FREE_ME
457
#  define PNG_FREE_ME_SUPPORTED
458
#endif
459
 
460
#if defined(PNG_READ_SUPPORTED)
461
 
462
#if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \
463
      !defined(PNG_NO_READ_TRANSFORMS)
464
#  define PNG_READ_TRANSFORMS_SUPPORTED
465
#endif
466
 
467
#ifdef PNG_READ_TRANSFORMS_SUPPORTED
468
#  ifndef PNG_NO_READ_EXPAND
469
#    define PNG_READ_EXPAND_SUPPORTED
470
#  endif
471
#  ifndef PNG_NO_READ_SHIFT
472
#    define PNG_READ_SHIFT_SUPPORTED
473
#  endif
474
#  ifndef PNG_NO_READ_PACK
475
#    define PNG_READ_PACK_SUPPORTED
476
#  endif
477
#  ifndef PNG_NO_READ_BGR
478
#    define PNG_READ_BGR_SUPPORTED
479
#  endif
480
#  ifndef PNG_NO_READ_SWAP
481
#    define PNG_READ_SWAP_SUPPORTED
482
#  endif
483
#  ifndef PNG_NO_READ_PACKSWAP
484
#    define PNG_READ_PACKSWAP_SUPPORTED
485
#  endif
486
#  ifndef PNG_NO_READ_INVERT
487
#    define PNG_READ_INVERT_SUPPORTED
488
#  endif
489
#  ifndef PNG_NO_READ_DITHER
490
#    define PNG_READ_DITHER_SUPPORTED
491
#  endif
492
#  ifndef PNG_NO_READ_BACKGROUND
493
#    define PNG_READ_BACKGROUND_SUPPORTED
494
#  endif
495
#  ifndef PNG_NO_READ_16_TO_8
496
#    define PNG_READ_16_TO_8_SUPPORTED
497
#  endif
498
#  ifndef PNG_NO_READ_FILLER
499
#    define PNG_READ_FILLER_SUPPORTED
500
#  endif
501
#  ifndef PNG_NO_READ_GAMMA
502
#    define PNG_READ_GAMMA_SUPPORTED
503
#  endif
504
#  ifndef PNG_NO_READ_GRAY_TO_RGB
505
#    define PNG_READ_GRAY_TO_RGB_SUPPORTED
506
#  endif
507
#  ifndef PNG_NO_READ_SWAP_ALPHA
508
#    define PNG_READ_SWAP_ALPHA_SUPPORTED
509
#  endif
510
#  ifndef PNG_NO_READ_INVERT_ALPHA
511
#    define PNG_READ_INVERT_ALPHA_SUPPORTED
512
#  endif
513
#  ifndef PNG_NO_READ_STRIP_ALPHA
514
#    define PNG_READ_STRIP_ALPHA_SUPPORTED
515
#  endif
516
#  ifndef PNG_NO_READ_USER_TRANSFORM
517
#    define PNG_READ_USER_TRANSFORM_SUPPORTED
518
#  endif
519
#  ifndef PNG_NO_READ_RGB_TO_GRAY
520
#    define PNG_READ_RGB_TO_GRAY_SUPPORTED
521
#  endif
522
#endif /* PNG_READ_TRANSFORMS_SUPPORTED */
523
 
524
#if !defined(PNG_NO_PROGRESSIVE_READ) && \
525
 !defined(PNG_PROGRESSIVE_READ_NOT_SUPPORTED)  /* if you don't do progressive */
526
#  define PNG_PROGRESSIVE_READ_SUPPORTED     /* reading.  This is not talking */
527
#endif                               /* about interlacing capability!  You'll */
528
              /* still have interlacing unless you change the following line: */
529
 
530
#define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */
531
 
532
#ifndef PNG_NO_READ_COMPOSITE_NODIV
533
#  ifndef PNG_NO_READ_COMPOSITED_NODIV  /* libpng-1.0.x misspelling */
534
#    define PNG_READ_COMPOSITE_NODIV_SUPPORTED   /* well tested on Intel, SGI */
535
#  endif
536
#endif
537
 
538
/* Deprecated, will be removed from version 2.0.0.
539
   Use PNG_MNG_FEATURES_SUPPORTED instead. */
540
#ifndef PNG_NO_READ_EMPTY_PLTE
541
#  define PNG_READ_EMPTY_PLTE_SUPPORTED
542
#endif
543
 
544
#endif /* PNG_READ_SUPPORTED */
545
 
546
#if defined(PNG_WRITE_SUPPORTED)
547
 
548
# if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \
549
    !defined(PNG_NO_WRITE_TRANSFORMS)
550
#  define PNG_WRITE_TRANSFORMS_SUPPORTED
551
#endif
552
 
553
#ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
554
#  ifndef PNG_NO_WRITE_SHIFT
555
#    define PNG_WRITE_SHIFT_SUPPORTED
556
#  endif
557
#  ifndef PNG_NO_WRITE_PACK
558
#    define PNG_WRITE_PACK_SUPPORTED
559
#  endif
560
#  ifndef PNG_NO_WRITE_BGR
561
#    define PNG_WRITE_BGR_SUPPORTED
562
#  endif
563
#  ifndef PNG_NO_WRITE_SWAP
564
#    define PNG_WRITE_SWAP_SUPPORTED
565
#  endif
566
#  ifndef PNG_NO_WRITE_PACKSWAP
567
#    define PNG_WRITE_PACKSWAP_SUPPORTED
568
#  endif
569
#  ifndef PNG_NO_WRITE_INVERT
570
#    define PNG_WRITE_INVERT_SUPPORTED
571
#  endif
572
#  ifndef PNG_NO_WRITE_FILLER
573
#    define PNG_WRITE_FILLER_SUPPORTED   /* same as WRITE_STRIP_ALPHA */
574
#  endif
575
#  ifndef PNG_NO_WRITE_SWAP_ALPHA
576
#    define PNG_WRITE_SWAP_ALPHA_SUPPORTED
577
#  endif
578
#  ifndef PNG_NO_WRITE_INVERT_ALPHA
579
#    define PNG_WRITE_INVERT_ALPHA_SUPPORTED
580
#  endif
581
#  ifndef PNG_NO_WRITE_USER_TRANSFORM
582
#    define PNG_WRITE_USER_TRANSFORM_SUPPORTED
583
#  endif
584
#endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */
585
 
586
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
587
    defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
588
#  ifndef PNG_NO_USER_TRANSFORM_PTR
589
#    define PNG_USER_TRANSFORM_PTR_SUPPORTED
590
#  endif
591
#endif
592
 
593
#define PNG_WRITE_INTERLACING_SUPPORTED  /* not required for PNG-compliant
594
                                            encoders, but can cause trouble
595
                                            if left undefined */
596
 
597
#if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \
598
     defined(PNG_FLOATING_POINT_SUPPORTED)
599
#  define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
600
#endif
601
 
602
#ifndef PNG_1_0_X
603
#ifndef PNG_NO_ERROR_NUMBERS
604
#define PNG_ERROR_NUMBERS_SUPPORTED
605
#endif
606
#endif /* PNG_1_0_X */
607
 
608
#ifndef PNG_NO_WRITE_FLUSH
609
#  define PNG_WRITE_FLUSH_SUPPORTED
610
#endif
611
 
612
/* Deprecated, see PNG_MNG_FEATURES_SUPPORTED, above */
613
#ifndef PNG_NO_WRITE_EMPTY_PLTE
614
#  define PNG_WRITE_EMPTY_PLTE_SUPPORTED
615
#endif
616
 
617
#endif /* PNG_WRITE_SUPPORTED */
618
 
619
#ifndef PNG_NO_STDIO
620
#  define PNG_TIME_RFC1123_SUPPORTED
621
#endif
622
 
623
/* This adds extra functions in pngget.c for accessing data from the
624
 * info pointer (added in version 0.99)
625
 * png_get_image_width()
626
 * png_get_image_height()
627
 * png_get_bit_depth()
628
 * png_get_color_type()
629
 * png_get_compression_type()
630
 * png_get_filter_type()
631
 * png_get_interlace_type()
632
 * png_get_pixel_aspect_ratio()
633
 * png_get_pixels_per_meter()
634
 * png_get_x_offset_pixels()
635
 * png_get_y_offset_pixels()
636
 * png_get_x_offset_microns()
637
 * png_get_y_offset_microns()
638
 */
639
#if !defined(PNG_NO_EASY_ACCESS) && !defined(PNG_EASY_ACCESS_SUPPORTED)
640
#  define PNG_EASY_ACCESS_SUPPORTED
641
#endif
642
 
643
/* PNG_ASSEMBLER_CODE was enabled by default in version 1.2.0
644
   even when PNG_USE_PNGVCRD or PNG_USE_PNGGCCRD is not defined */
645
#if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_ASSEMBLER_CODE)
646
#  ifndef PNG_ASSEMBLER_CODE_SUPPORTED
647
#    define PNG_ASSEMBLER_CODE_SUPPORTED
648
#  endif
649
#  if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
650
#    define PNG_MMX_CODE_SUPPORTED
651
#  endif
652
#endif
653
 
654
/* If you are sure that you don't need thread safety and you are compiling
655
   with PNG_USE_PNGCCRD for an MMX application, you can define this for
656
   faster execution.  See pnggccrd.c.
657
#define PNG_THREAD_UNSAFE_OK
658
*/
659
 
660
#if !defined(PNG_1_0_X)
661
#if !defined(PNG_NO_USER_MEM) && !defined(PNG_USER_MEM_SUPPORTED)
662
#  define PNG_USER_MEM_SUPPORTED
663
#endif
664
#endif /* PNG_1_0_X */
665
 
666
/* These are currently experimental features, define them if you want */
667
 
668
/* very little testing */
669
/*
670
#ifdef PNG_READ_SUPPORTED
671
#  ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
672
#    define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
673
#  endif
674
#endif
675
*/
676
 
677
/* This is only for PowerPC big-endian and 680x0 systems */
678
/* some testing */
679
/*
680
#ifdef PNG_READ_SUPPORTED
681
#  ifndef PNG_PNG_READ_BIG_ENDIAN_SUPPORTED
682
#    define PNG_READ_BIG_ENDIAN_SUPPORTED
683
#  endif
684
#endif
685
*/
686
 
687
/* Buggy compilers (e.g., gcc 2.7.2.2) need this */
688
/*
689
#define PNG_NO_POINTER_INDEXING
690
*/
691
 
692
/* These functions are turned off by default, as they will be phased out. */
693
/*
694
#define  PNG_USELESS_TESTS_SUPPORTED
695
#define  PNG_CORRECT_PALETTE_SUPPORTED
696
*/
697
 
698
/* Any chunks you are not interested in, you can undef here.  The
699
 * ones that allocate memory may be expecially important (hIST,
700
 * tEXt, zTXt, tRNS, pCAL).  Others will just save time and make png_info
701
 * a bit smaller.
702
 */
703
 
704
#if defined(PNG_READ_SUPPORTED) && \
705
    !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
706
    !defined(PNG_NO_READ_ANCILLARY_CHUNKS)
707
#  define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
708
#endif
709
 
710
#if defined(PNG_WRITE_SUPPORTED) && \
711
    !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
712
    !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS)
713
#  define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
714
#endif
715
 
716
#ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
717
 
718
#ifdef PNG_NO_READ_TEXT
719
#  define PNG_NO_READ_iTXt
720
#  define PNG_NO_READ_tEXt
721
#  define PNG_NO_READ_zTXt
722
#endif
723
#ifndef PNG_NO_READ_bKGD
724
#  define PNG_READ_bKGD_SUPPORTED
725
#  define PNG_bKGD_SUPPORTED
726
#endif
727
#ifndef PNG_NO_READ_cHRM
728
#  define PNG_READ_cHRM_SUPPORTED
729
#  define PNG_cHRM_SUPPORTED
730
#endif
731
#ifndef PNG_NO_READ_gAMA
732
#  define PNG_READ_gAMA_SUPPORTED
733
#  define PNG_gAMA_SUPPORTED
734
#endif
735
#ifndef PNG_NO_READ_hIST
736
#  define PNG_READ_hIST_SUPPORTED
737
#  define PNG_hIST_SUPPORTED
738
#endif
739
#ifndef PNG_NO_READ_iCCP
740
#  define PNG_READ_iCCP_SUPPORTED
741
#  define PNG_iCCP_SUPPORTED
742
#endif
743
#ifndef PNG_NO_READ_iTXt
744
#  ifndef PNG_READ_iTXt_SUPPORTED
745
#    define PNG_READ_iTXt_SUPPORTED
746
#  endif
747
#  ifndef PNG_iTXt_SUPPORTED
748
#    define PNG_iTXt_SUPPORTED
749
#  endif
750
#endif
751
#ifndef PNG_NO_READ_oFFs
752
#  define PNG_READ_oFFs_SUPPORTED
753
#  define PNG_oFFs_SUPPORTED
754
#endif
755
#ifndef PNG_NO_READ_pCAL
756
#  define PNG_READ_pCAL_SUPPORTED
757
#  define PNG_pCAL_SUPPORTED
758
#endif
759
#ifndef PNG_NO_READ_sCAL
760
#  define PNG_READ_sCAL_SUPPORTED
761
#  define PNG_sCAL_SUPPORTED
762
#endif
763
#ifndef PNG_NO_READ_pHYs
764
#  define PNG_READ_pHYs_SUPPORTED
765
#  define PNG_pHYs_SUPPORTED
766
#endif
767
#ifndef PNG_NO_READ_sBIT
768
#  define PNG_READ_sBIT_SUPPORTED
769
#  define PNG_sBIT_SUPPORTED
770
#endif
771
#ifndef PNG_NO_READ_sPLT
772
#  define PNG_READ_sPLT_SUPPORTED
773
#  define PNG_sPLT_SUPPORTED
774
#endif
775
#ifndef PNG_NO_READ_sRGB
776
#  define PNG_READ_sRGB_SUPPORTED
777
#  define PNG_sRGB_SUPPORTED
778
#endif
779
#ifndef PNG_NO_READ_tEXt
780
#  define PNG_READ_tEXt_SUPPORTED
781
#  define PNG_tEXt_SUPPORTED
782
#endif
783
#ifndef PNG_NO_READ_tIME
784
#  define PNG_READ_tIME_SUPPORTED
785
#  define PNG_tIME_SUPPORTED
786
#endif
787
#ifndef PNG_NO_READ_tRNS
788
#  define PNG_READ_tRNS_SUPPORTED
789
#  define PNG_tRNS_SUPPORTED
790
#endif
791
#ifndef PNG_NO_READ_zTXt
792
#  define PNG_READ_zTXt_SUPPORTED
793
#  define PNG_zTXt_SUPPORTED
794
#endif
795
#ifndef PNG_NO_READ_UNKNOWN_CHUNKS
796
#  define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
797
#  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
798
#    define PNG_UNKNOWN_CHUNKS_SUPPORTED
799
#  endif
800
#  ifndef PNG_NO_HANDLE_AS_UNKNOWN
801
#    define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
802
#  endif
803
#endif
804
#if !defined(PNG_NO_READ_USER_CHUNKS) && \
805
     defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
806
#  define PNG_READ_USER_CHUNKS_SUPPORTED
807
#  define PNG_USER_CHUNKS_SUPPORTED
808
#  ifdef PNG_NO_READ_UNKNOWN_CHUNKS
809
#    undef PNG_NO_READ_UNKNOWN_CHUNKS
810
#  endif
811
#  ifdef PNG_NO_HANDLE_AS_UNKNOWN
812
#    undef PNG_NO_HANDLE_AS_UNKNOWN
813
#  endif
814
#endif
815
#ifndef PNG_NO_READ_OPT_PLTE
816
#  define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */
817
#endif                      /* optional PLTE chunk in RGB and RGBA images */
818
#if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \
819
    defined(PNG_READ_zTXt_SUPPORTED)
820
#  define PNG_READ_TEXT_SUPPORTED
821
#  define PNG_TEXT_SUPPORTED
822
#endif
823
 
824
#endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */
825
 
826
#ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
827
 
828
#ifdef PNG_NO_WRITE_TEXT
829
#  define PNG_NO_WRITE_iTXt
830
#  define PNG_NO_WRITE_tEXt
831
#  define PNG_NO_WRITE_zTXt
832
#endif
833
#ifndef PNG_NO_WRITE_bKGD
834
#  define PNG_WRITE_bKGD_SUPPORTED
835
#  ifndef PNG_bKGD_SUPPORTED
836
#    define PNG_bKGD_SUPPORTED
837
#  endif
838
#endif
839
#ifndef PNG_NO_WRITE_cHRM
840
#  define PNG_WRITE_cHRM_SUPPORTED
841
#  ifndef PNG_cHRM_SUPPORTED
842
#    define PNG_cHRM_SUPPORTED
843
#  endif
844
#endif
845
#ifndef PNG_NO_WRITE_gAMA
846
#  define PNG_WRITE_gAMA_SUPPORTED
847
#  ifndef PNG_gAMA_SUPPORTED
848
#    define PNG_gAMA_SUPPORTED
849
#  endif
850
#endif
851
#ifndef PNG_NO_WRITE_hIST
852
#  define PNG_WRITE_hIST_SUPPORTED
853
#  ifndef PNG_hIST_SUPPORTED
854
#    define PNG_hIST_SUPPORTED
855
#  endif
856
#endif
857
#ifndef PNG_NO_WRITE_iCCP
858
#  define PNG_WRITE_iCCP_SUPPORTED
859
#  ifndef PNG_iCCP_SUPPORTED
860
#    define PNG_iCCP_SUPPORTED
861
#  endif
862
#endif
863
#ifndef PNG_NO_WRITE_iTXt
864
#  ifndef PNG_WRITE_iTXt_SUPPORTED
865
#    define PNG_WRITE_iTXt_SUPPORTED
866
#  endif
867
#  ifndef PNG_iTXt_SUPPORTED
868
#    define PNG_iTXt_SUPPORTED
869
#  endif
870
#endif
871
#ifndef PNG_NO_WRITE_oFFs
872
#  define PNG_WRITE_oFFs_SUPPORTED
873
#  ifndef PNG_oFFs_SUPPORTED
874
#    define PNG_oFFs_SUPPORTED
875
#  endif
876
#endif
877
#ifndef PNG_NO_WRITE_pCAL
878
#  define PNG_WRITE_pCAL_SUPPORTED
879
#  ifndef PNG_pCAL_SUPPORTED
880
#    define PNG_pCAL_SUPPORTED
881
#  endif
882
#endif
883
#ifndef PNG_NO_WRITE_sCAL
884
#  define PNG_WRITE_sCAL_SUPPORTED
885
#  ifndef PNG_sCAL_SUPPORTED
886
#    define PNG_sCAL_SUPPORTED
887
#  endif
888
#endif
889
#ifndef PNG_NO_WRITE_pHYs
890
#  define PNG_WRITE_pHYs_SUPPORTED
891
#  ifndef PNG_pHYs_SUPPORTED
892
#    define PNG_pHYs_SUPPORTED
893
#  endif
894
#endif
895
#ifndef PNG_NO_WRITE_sBIT
896
#  define PNG_WRITE_sBIT_SUPPORTED
897
#  ifndef PNG_sBIT_SUPPORTED
898
#    define PNG_sBIT_SUPPORTED
899
#  endif
900
#endif
901
#ifndef PNG_NO_WRITE_sPLT
902
#  define PNG_WRITE_sPLT_SUPPORTED
903
#  ifndef PNG_sPLT_SUPPORTED
904
#    define PNG_sPLT_SUPPORTED
905
#  endif
906
#endif
907
#ifndef PNG_NO_WRITE_sRGB
908
#  define PNG_WRITE_sRGB_SUPPORTED
909
#  ifndef PNG_sRGB_SUPPORTED
910
#    define PNG_sRGB_SUPPORTED
911
#  endif
912
#endif
913
#ifndef PNG_NO_WRITE_tEXt
914
#  define PNG_WRITE_tEXt_SUPPORTED
915
#  ifndef PNG_tEXt_SUPPORTED
916
#    define PNG_tEXt_SUPPORTED
917
#  endif
918
#endif
919
#ifndef PNG_NO_WRITE_tIME
920
//#  define PNG_WRITE_tIME_SUPPORTED
921
#  ifndef PNG_tIME_SUPPORTED
922
//#    define PNG_tIME_SUPPORTED
923
#  endif
924
#endif
925
#ifndef PNG_NO_WRITE_tRNS
926
#  define PNG_WRITE_tRNS_SUPPORTED
927
#  ifndef PNG_tRNS_SUPPORTED
928
#    define PNG_tRNS_SUPPORTED
929
#  endif
930
#endif
931
#ifndef PNG_NO_WRITE_zTXt
932
#  define PNG_WRITE_zTXt_SUPPORTED
933
#  ifndef PNG_zTXt_SUPPORTED
934
#    define PNG_zTXt_SUPPORTED
935
#  endif
936
#endif
937
#ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS
938
#  define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
939
#  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
940
#    define PNG_UNKNOWN_CHUNKS_SUPPORTED
941
#  endif
942
#  ifndef PNG_NO_HANDLE_AS_UNKNOWN
943
#     ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
944
#       define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
945
#     endif
946
#  endif
947
#endif
948
#if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
949
    defined(PNG_WRITE_zTXt_SUPPORTED)
950
#  define PNG_WRITE_TEXT_SUPPORTED
951
#  ifndef PNG_TEXT_SUPPORTED
952
#    define PNG_TEXT_SUPPORTED
953
#  endif
954
#endif
955
 
956
#endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */
957
 
958
/* Turn this off to disable png_read_png() and
959
 * png_write_png() and leave the row_pointers member
960
 * out of the info structure.
961
 */
962
#ifndef PNG_NO_INFO_IMAGE
963
#  define PNG_INFO_IMAGE_SUPPORTED
964
#endif
965
 
966
/* need the time information for reading tIME chunks */
967
#if defined(PNG_tIME_SUPPORTED)
968
#  if !defined(_WIN32_WCE)
969
     /* "time.h" functions are not supported on WindowsCE */
970
#    include <time.h>
971
#  endif
972
#endif
973
 
974
/* Some typedefs to get us started.  These should be safe on most of the
975
 * common platforms.  The typedefs should be at least as large as the
976
 * numbers suggest (a png_uint_32 must be at least 32 bits long), but they
977
 * don't have to be exactly that size.  Some compilers dislike passing
978
 * unsigned shorts as function parameters, so you may be better off using
979
 * unsigned int for png_uint_16.  Likewise, for 64-bit systems, you may
980
 * want to have unsigned int for png_uint_32 instead of unsigned long.
981
 */
982
 
983
typedef unsigned long png_uint_32;
984
typedef long png_int_32;
985
typedef unsigned short png_uint_16;
986
typedef short png_int_16;
987
typedef unsigned char png_byte;
988
 
989
/* This is usually size_t.  It is typedef'ed just in case you need it to
990
   change (I'm not sure if you will or not, so I thought I'd be safe) */
991
typedef size_t png_size_t;
992
 
993
/* The following is needed for medium model support.  It cannot be in the
994
 * PNG_INTERNAL section.  Needs modification for other compilers besides
995
 * MSC.  Model independent support declares all arrays and pointers to be
996
 * large using the far keyword.  The zlib version used must also support
997
 * model independent data.  As of version zlib 1.0.4, the necessary changes
998
 * have been made in zlib.  The USE_FAR_KEYWORD define triggers other
999
 * changes that are needed. (Tim Wegner)
1000
 */
1001
 
1002
/* Separate compiler dependencies (problem here is that zlib.h always
1003
   defines FAR. (SJT) */
1004
#ifdef __BORLANDC__
1005
#  if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)
1006
#    define LDATA 1
1007
#  else
1008
#    define LDATA 0
1009
#  endif
1010
   /* GRR:  why is Cygwin in here?  Cygwin is not Borland C... */
1011
#  if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)
1012
#    define PNG_MAX_MALLOC_64K
1013
#    if (LDATA != 1)
1014
#      ifndef FAR
1015
#        define FAR __far
1016
#      endif
1017
#      define USE_FAR_KEYWORD
1018
#    endif   /* LDATA != 1 */
1019
     /* Possibly useful for moving data out of default segment.
1020
      * Uncomment it if you want. Could also define FARDATA as
1021
      * const if your compiler supports it. (SJT)
1022
#    define FARDATA FAR
1023
      */
1024
#  endif  /* __WIN32__, __FLAT__, __CYGWIN__ */
1025
#endif   /* __BORLANDC__ */
1026
 
1027
 
1028
/* Suggest testing for specific compiler first before testing for
1029
 * FAR.  The Watcom compiler defines both __MEDIUM__ and M_I86MM,
1030
 * making reliance oncertain keywords suspect. (SJT)
1031
 */
1032
 
1033
/* MSC Medium model */
1034
#if defined(FAR)
1035
#  if defined(M_I86MM)
1036
#    define USE_FAR_KEYWORD
1037
#    define FARDATA FAR
1038
#    include <dos.h>
1039
#  endif
1040
#endif
1041
 
1042
/* SJT: default case */
1043
#ifndef FAR
1044
#  define FAR
1045
#endif
1046
 
1047
/* At this point FAR is always defined */
1048
#ifndef FARDATA
1049
#  define FARDATA
1050
#endif
1051
 
1052
/* Typedef for floating-point numbers that are converted
1053
   to fixed-point with a multiple of 100,000, e.g., int_gamma */
1054
typedef png_int_32 png_fixed_point;
1055
 
1056
/* Add typedefs for pointers */
1057
typedef void            FAR * png_voidp;
1058
typedef png_byte        FAR * png_bytep;
1059
typedef png_uint_32     FAR * png_uint_32p;
1060
typedef png_int_32      FAR * png_int_32p;
1061
typedef png_uint_16     FAR * png_uint_16p;
1062
typedef png_int_16      FAR * png_int_16p;
1063
typedef PNG_CONST char  FAR * png_const_charp;
1064
typedef char            FAR * png_charp;
1065
typedef png_fixed_point FAR * png_fixed_point_p;
1066
 
1067
#ifndef PNG_NO_STDIO
1068
#if defined(_WIN32_WCE)
1069
typedef HANDLE                png_FILE_p;
1070
#else
1071
typedef FILE                * png_FILE_p;
1072
#endif
1073
#endif
1074
 
1075
#ifdef PNG_FLOATING_POINT_SUPPORTED
1076
typedef double          FAR * png_doublep;
1077
#endif
1078
 
1079
/* Pointers to pointers; i.e. arrays */
1080
typedef png_byte        FAR * FAR * png_bytepp;
1081
typedef png_uint_32     FAR * FAR * png_uint_32pp;
1082
typedef png_int_32      FAR * FAR * png_int_32pp;
1083
typedef png_uint_16     FAR * FAR * png_uint_16pp;
1084
typedef png_int_16      FAR * FAR * png_int_16pp;
1085
typedef PNG_CONST char  FAR * FAR * png_const_charpp;
1086
typedef char            FAR * FAR * png_charpp;
1087
typedef png_fixed_point FAR * FAR * png_fixed_point_pp;
1088
#ifdef PNG_FLOATING_POINT_SUPPORTED
1089
typedef double          FAR * FAR * png_doublepp;
1090
#endif
1091
 
1092
/* Pointers to pointers to pointers; i.e., pointer to array */
1093
typedef char            FAR * FAR * FAR * png_charppp;
1094
 
1095
/* libpng typedefs for types in zlib. If zlib changes
1096
 * or another compression library is used, then change these.
1097
 * Eliminates need to change all the source files.
1098
 */
1099
typedef charf *         png_zcharp;
1100
typedef charf * FAR *   png_zcharpp;
1101
typedef z_stream FAR *  png_zstreamp;
1102
 
1103
/*
1104
 * Define PNG_BUILD_DLL if the module being built is a Windows
1105
 * LIBPNG DLL.
1106
 *
1107
 * Define PNG_USE_DLL if you want to *link* to the Windows LIBPNG DLL.
1108
 * It is equivalent to Microsoft predefined macro _DLL that is
1109
 * automatically defined when you compile using the share
1110
 * version of the CRT (C Run-Time library)
1111
 *
1112
 * The cygwin mods make this behavior a little different:
1113
 * Define PNG_BUILD_DLL if you are building a dll for use with cygwin
1114
 * Define PNG_STATIC if you are building a static library for use with cygwin,
1115
 *   -or- if you are building an application that you want to link to the
1116
 *   static library.
1117
 * PNG_USE_DLL is defined by default (no user action needed) unless one of
1118
 *   the other flags is defined.
1119
 */
1120
 
1121
#if !defined(PNG_DLL) && (defined(PNG_BUILD_DLL) || defined(PNG_USE_DLL))
1122
#  define PNG_DLL
1123
#endif
1124
/* If CYGWIN, then disallow GLOBAL ARRAYS unless building a static lib.
1125
 * When building a static lib, default to no GLOBAL ARRAYS, but allow
1126
 * command-line override
1127
 */
1128
#if defined(__CYGWIN__)
1129
#  if !defined(PNG_STATIC)
1130
#    if defined(PNG_USE_GLOBAL_ARRAYS)
1131
#      undef PNG_USE_GLOBAL_ARRAYS
1132
#    endif
1133
#    if !defined(PNG_USE_LOCAL_ARRAYS)
1134
#      define PNG_USE_LOCAL_ARRAYS
1135
#    endif
1136
#  else
1137
#    if defined(PNG_USE_LOCAL_ARRAYS) || defined(PNG_NO_GLOBAL_ARRAYS)
1138
#      if defined(PNG_USE_GLOBAL_ARRAYS)
1139
#        undef PNG_USE_GLOBAL_ARRAYS
1140
#      endif
1141
#    endif
1142
#  endif
1143
#  if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1144
#    define PNG_USE_LOCAL_ARRAYS
1145
#  endif
1146
#endif
1147
 
1148
/* Do not use global arrays (helps with building DLL's)
1149
 * They are no longer used in libpng itself, since version 1.0.5c,
1150
 * but might be required for some pre-1.0.5c applications.
1151
 */
1152
#if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1153
#  if defined(PNG_NO_GLOBAL_ARRAYS) || (defined(__GNUC__) && defined(PNG_DLL))
1154
#    define PNG_USE_LOCAL_ARRAYS
1155
#  else
1156
#    define PNG_USE_GLOBAL_ARRAYS
1157
#  endif
1158
#endif
1159
 
1160
#if defined(__CYGWIN__)
1161
#  undef PNGAPI
1162
#  define PNGAPI __cdecl
1163
#  undef PNG_IMPEXP
1164
#  define PNG_IMPEXP
1165
#endif  
1166
 
1167
/* If you define PNGAPI, e.g., with compiler option "-DPNGAPI=__stdcall",
1168
 * you may get warnings regarding the linkage of png_zalloc and png_zfree.
1169
 * Don't ignore those warnings; you must also reset the default calling
1170
 * convention in your compiler to match your PNGAPI, and you must build
1171
 * zlib and your applications the same way you build libpng.
1172
 */
1173
 
1174
#ifndef PNGAPI
1175
 
1176
#if defined(__MINGW32__) && !defined(PNG_MODULEDEF)
1177
#  ifndef PNG_NO_MODULEDEF
1178
#    define PNG_NO_MODULEDEF
1179
#  endif
1180
#endif
1181
 
1182
#if !defined(PNG_IMPEXP) && defined(PNG_BUILD_DLL) && !defined(PNG_NO_MODULEDEF)
1183
#  define PNG_IMPEXP
1184
#endif
1185
 
1186
#if defined(PNG_DLL) || defined(_DLL) || defined(__DLL__ ) || \
1187
    (( defined(_Windows) || defined(_WINDOWS) || \
1188
       defined(WIN32) || defined(_WIN32) || defined(__WIN32__) ))
1189
 
1190
#  if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
1191
#    define PNGAPI __cdecl
1192
#  else
1193
#    define PNGAPI _cdecl
1194
#  endif
1195
 
1196
#  if !defined(PNG_IMPEXP) && (!defined(PNG_DLL) || \
1197
 
1198
#     define PNG_IMPEXP
1199
#  endif
1200
 
1201
#  if !defined(PNG_IMPEXP)
1202
 
1203
#     define PNG_EXPORT_TYPE1(type,symbol)  PNG_IMPEXP type PNGAPI symbol
1204
#     define PNG_EXPORT_TYPE2(type,symbol)  type PNG_IMPEXP PNGAPI symbol
1205
 
1206
      /* Borland/Microsoft */
1207
#     if defined(_MSC_VER) || defined(__BORLANDC__)
1208
#        if (_MSC_VER >= 800) || (__BORLANDC__ >= 0x500)
1209
#           define PNG_EXPORT PNG_EXPORT_TYPE1
1210
#        else
1211
#           define PNG_EXPORT PNG_EXPORT_TYPE2
1212
#           if defined(PNG_BUILD_DLL)
1213
#              define PNG_IMPEXP __export
1214
#           else
1215
#              define PNG_IMPEXP /*__import */ /* doesn't exist AFAIK in
1216
                                                 VC++ */
1217
#           endif                             /* Exists in Borland C++ for
1218
                                                 C++ classes (== huge) */
1219
#        endif
1220
#     endif
1221
 
1222
#     if !defined(PNG_IMPEXP)
1223
#        if defined(PNG_BUILD_DLL)
1224
#           define PNG_IMPEXP __declspec(dllexport)
1225
#        else
1226
#           define PNG_IMPEXP __declspec(dllimport)
1227
#        endif
1228
#     endif
1229
#  endif  /* PNG_IMPEXP */
1230
#else /* !(DLL || non-cygwin WINDOWS) */
1231
#    if (defined(__IBMC__) || defined(IBMCPP__)) && defined(__OS2__)
1232
#      define PNGAPI _System
1233
#      define PNG_IMPEXP
1234
#    else
1235
#      if 0 /* ... other platforms, with other meanings */
1236
#      else
1237
#        define PNGAPI
1238
#        define PNG_IMPEXP
1239
#      endif
1240
#    endif
1241
#endif
1242
#endif
1243
 
1244
#ifndef PNGAPI
1245
#  define PNGAPI
1246
#endif
1247
#ifndef PNG_IMPEXP
1248
#  define PNG_IMPEXP
1249
#endif
1250
 
1251
#ifndef PNG_EXPORT
1252
#  define PNG_EXPORT(type,symbol) PNG_IMPEXP type PNGAPI symbol
1253
#endif
1254
 
1255
#ifdef PNG_USE_GLOBAL_ARRAYS
1256
#  ifndef PNG_EXPORT_VAR
1257
#    define PNG_EXPORT_VAR(type) extern PNG_IMPEXP type
1258
#  endif
1259
#endif
1260
 
1261
/* User may want to use these so they are not in PNG_INTERNAL. Any library
1262
 * functions that are passed far data must be model independent.
1263
 */
1264
 
1265
#ifndef PNG_ABORT
1266
#  define PNG_ABORT() abort()
1267
#endif
1268
 
1269
#ifdef PNG_SETJMP_SUPPORTED
1270
#  define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf)
1271
#else
1272
#  define png_jmpbuf(png_ptr) \
1273
   (LIBPNG_WAS_COMPILED_WITH__PNG_SETJMP_NOT_SUPPORTED)
1274
#endif
1275
 
1276
#if defined(USE_FAR_KEYWORD)  /* memory model independent fns */
1277
/* use this to make far-to-near assignments */
1278
#  define CHECK   1
1279
#  define NOCHECK 0
1280
#  define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK))
1281
#  define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK))
1282
#  define png_strcpy _fstrcpy
1283
#  define png_strlen _fstrlen
1284
#  define png_memcmp _fmemcmp      /* SJT: added */
1285
#  define png_memcpy _fmemcpy
1286
#  define png_memset _fmemset
1287
#else /* use the usual functions */
1288
#  define CVT_PTR(ptr)         (ptr)
1289
#  define CVT_PTR_NOCHECK(ptr) (ptr)
1290
#  define png_strcpy strcpy
1291
#  define png_strlen strlen
1292
#  define png_memcmp memcmp     /* SJT: added */
1293
#  define png_memcpy memcpy
1294
#  define png_memset memset
1295
#endif
1296
/* End of memory model independent support */
1297
 
1298
/* Just a little check that someone hasn't tried to define something
1299
 * contradictory.
1300
 */
1301
#if (PNG_ZBUF_SIZE > 65536) && defined(PNG_MAX_MALLOC_64K)
1302
#  undef PNG_ZBUF_SIZE
1303
#  define PNG_ZBUF_SIZE 65536
1304
#endif
1305
 
1306
#ifdef PNG_READ_SUPPORTED
1307
/* Prior to libpng-1.0.9, this block was in pngasmrd.h */
1308
#if defined(PNG_INTERNAL)
1309
 
1310
/* These are the default thresholds before the MMX code kicks in; if either
1311
 * rowbytes or bitdepth is below the threshold, plain C code is used.  These
1312
 * can be overridden at runtime via the png_set_mmx_thresholds() call in
1313
 * libpng 1.2.0 and later.  The values below were chosen by Intel.
1314
 */
1315
 
1316
#ifndef PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT
1317
#  define PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT  128  /*  >=  */
1318
#endif
1319
#ifndef PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT
1320
#  define PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT  9    /*  >=  */   
1321
#endif
1322
 
1323
/* Set this in the makefile for VC++ on Pentium, not here. */
1324
/* Platform must be Pentium.  Makefile must assemble and load pngvcrd.c .
1325
 * MMX will be detected at run time and used if present.
1326
 */
1327
#ifdef PNG_USE_PNGVCRD
1328
#  define PNG_HAVE_ASSEMBLER_COMBINE_ROW
1329
#  define PNG_HAVE_ASSEMBLER_READ_INTERLACE
1330
#  define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
1331
#endif
1332
 
1333
/* Set this in the makefile for gcc/as on Pentium, not here. */
1334
/* Platform must be Pentium.  Makefile must assemble and load pnggccrd.c .
1335
 * MMX will be detected at run time and used if present.
1336
 */
1337
#ifdef PNG_USE_PNGGCCRD
1338
#  define PNG_HAVE_ASSEMBLER_COMBINE_ROW
1339
#  define PNG_HAVE_ASSEMBLER_READ_INTERLACE
1340
#  define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
1341
#endif
1342
/* - see pnggccrd.c for info about what is currently enabled */
1343
 
1344
#endif /* PNG_INTERNAL */
1345
#endif /* PNG_READ_SUPPORTED */
1346
 
1347
#endif /* PNGCONF_H */
1348