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Override GetPixelSize on OS X as the base impl creates a wxScreenDC each time, which...
[wxWidgets.git] / src / png / pngconf.h
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5b02c8a1 1
75b6e0a0
GD		 2/* pngconf.h - machine configurable file for libpng
3 *
706b8807 4 * libpng version 1.2.7 - September 12, 2004
75b6e0a0 5 * For conditions of distribution and use, see copyright notice in png.h
5b02c8a1 6 * Copyright (c) 1998-2004 Glenn Randers-Pehrson
4946a942
GD		 7 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
8 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
75b6e0a0
GD		 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
5b02c8a1
VS		 20#ifdef PNG_USER_CONFIG
21#include "pngusr.h"
22#endif
23
75b6e0a0
GD		 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
4946a942
GD		 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
75b6e0a0
GD		 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)
4946a942
GD		 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
77aecce0 88 * PNG_STATIC -- (ignored) building the static lib, or building an
4946a942 89 * application that links to the static lib.
77aecce0 90 * ALL_STATIC -- (ignored) building various static libs, or building an
4946a942
GD		 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
77aecce0 103 *
4946a942 104 * CYGWIN (2002-01-20): The preceding is now obsolete. With the advent
77aecce0 105 * of auto-import in binutils, we no longer need to worry about
4946a942
GD		 106 * __declspec(dllexport) / __declspec(dllimport) and friends. Therefore,
107 * we don't need to worry about PNG_STATIC or ALL_STATIC when it comes
77aecce0 108 * to __declspec() stuff. However, we DO need to worry about
4946a942
GD		 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
77aecce0
DW		 152# endif
153# endif
4946a942 154# endif
75b6e0a0
GD		 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,
4946a942 164 * unless (PNG_DEBUG > 0) has been #defined.
75b6e0a0
GD		 165 *
166 * #define PNG_NO_CONSOLE_IO
167 * #define PNG_NO_STDIO
168 */
169
4946a942
GD		 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
75b6e0a0 176# endif
4946a942
GD		 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
75b6e0a0
GD		 187# ifdef PNG_NO_STDIO
188# ifndef PNG_NO_CONSOLE_IO
189# define PNG_NO_CONSOLE_IO
190# endif
4946a942
GD		 191# ifdef PNG_DEBUG
192# if (PNG_DEBUG > 0)
193# include <stdio.h>
194# endif
195# endif
75b6e0a0 196# else
4946a942
GD		 197# if !defined(_WIN32_WCE)
198/* "stdio.h" functions are not supported on WindowsCE */
199# include <stdio.h>
200# endif
75b6e0a0 201# endif
75b6e0a0
GD		 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 */
4946a942 213# define PNGARG(arglist) OF(arglist)
75b6e0a0
GD		 214#else
215
216#ifdef _NO_PROTO
4946a942
GD		 217# define PNGARG(arglist) ()
218# ifndef PNG_TYPECAST_NULL
219# define PNG_TYPECAST_NULL
220# endif
75b6e0a0 221#else
4946a942 222# define PNGARG(arglist) arglist
75b6e0a0
GD		 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
4946a942 234# if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
7d584866 235 defined(THINK_C) || (defined(__SC__) && !defined(__DMC__))|| defined(TARGET_OS_MAC)
4946a942
GD		 236# define MACOS
237# endif
75b6e0a0
GD		 238#endif
239
240/* enough people need this for various reasons to include it here */
4946a942
GD		 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
75b6e0a0
GD		 247#endif
248
4946a942 249#ifdef PNG_SETJMP_SUPPORTED
75b6e0a0
GD		 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 */
75b6e0a0 253
4946a942
GD		 254# ifdef __linux__
255# ifdef _BSD_SOURCE
256# define PNG_SAVE_BSD_SOURCE
257# undef _BSD_SOURCE
258# endif
259# ifdef _SETJMP_H
5b02c8a1
VS		 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.;
4946a942
GD		 265# endif
266# endif /* __linux__ */
267
268 /* include setjmp.h for error handling */
269# include <setjmp.h>
75b6e0a0 270
4946a942
GD		 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 */
75b6e0a0
GD		 278
279#ifdef BSD
4946a942 280# include <strings.h>
75b6e0a0 281#else
4946a942 282# include <string.h>
75b6e0a0
GD		 283#endif
284
285/* Other defines for things like memory and the like can go here. */
286#ifdef PNG_INTERNAL
4946a942 287
75b6e0a0
GD		 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
4946a942
GD		 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
75b6e0a0
GD		 321#endif
322
323/* Codewarrior on NT has linking problems without this. */
4946a942
GD		 324#if (defined(__MWERKS__) && defined(WIN32)) || defined(__STDC__)
325# define PNG_ALWAYS_EXTERN
75b6e0a0
GD		 326#endif
327
5b02c8a1
VS		 328/* This provides the non-ANSI (far) memory allocation routines. */
329#if defined(__TURBOC__) && defined(__MSDOS__)
4946a942 330# include <mem.h>
5b02c8a1 331# include <alloc.h>
75b6e0a0
GD		 332#endif
333
5b02c8a1 334/* I have no idea why is this necessary... */
4946a942
GD		 335#if defined(_MSC_VER) && (defined(WIN32) || defined(_Windows) || \
336 defined(_WINDOWS) || defined(_WIN32) || defined(__WIN32__))
337# include <malloc.h>
75b6e0a0
GD		 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
4946a942 345# define PNG_DITHER_RED_BITS 5
75b6e0a0
GD		 346#endif
347#ifndef PNG_DITHER_GREEN_BITS
4946a942 348# define PNG_DITHER_GREEN_BITS 5
75b6e0a0
GD		 349#endif
350#ifndef PNG_DITHER_BLUE_BITS
4946a942 351# define PNG_DITHER_BLUE_BITS 5
75b6e0a0
GD		 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
4946a942 362# define PNG_MAX_GAMMA_8 11
75b6e0a0
GD		 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
4946a942 369# define PNG_GAMMA_THRESHOLD 0.05
75b6e0a0
GD		 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
4946a942 399/* Any features you will not be using can be undef'ed here */
75b6e0a0
GD		 400
401/* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user
4946a942
GD		 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)
75b6e0a0
GD		 409 */
410
4946a942
GD		 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 */
75b6e0a0 417
4946a942
GD		 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
75b6e0a0 425#endif
4946a942
GD		 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
75b6e0a0
GD		 471#endif
472
473#ifdef PNG_READ_TRANSFORMS_SUPPORTED
4946a942
GD		 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
75b6e0a0
GD		 528#endif /* PNG_READ_TRANSFORMS_SUPPORTED */
529
530#if !defined(PNG_NO_PROGRESSIVE_READ) && \
4946a942
GD		 531 !defined(PNG_PROGRESSIVE_READ_NOT_SUPPORTED) /* if you don't do progressive */
532# define PNG_PROGRESSIVE_READ_SUPPORTED /* reading. This is not talking */
75b6e0a0
GD		 533#endif /* about interlacing capability! You'll */
534 /* still have interlacing unless you change the following line: */
4946a942 535
75b6e0a0
GD		 536#define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */
537
4946a942
GD		 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
75b6e0a0
GD		 542#endif
543
4946a942
GD		 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
75b6e0a0 548#endif
4946a942
GD		 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
75b6e0a0 557#endif
4946a942
GD		 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
75b6e0a0
GD		 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
4946a942
GD		 596#if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \
597 defined(PNG_FLOATING_POINT_SUPPORTED)
598# define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
75b6e0a0
GD		 599#endif
600
601#ifndef PNG_NO_WRITE_FLUSH
4946a942
GD		 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
75b6e0a0
GD		 608#endif
609
4946a942
GD		 610#endif /* PNG_WRITE_SUPPORTED */
611
706b8807
VS		 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
75b6e0a0 625#ifndef PNG_NO_STDIO
4946a942 626# define PNG_TIME_RFC1123_SUPPORTED
75b6e0a0
GD		 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 */
4946a942
GD		 645#if !defined(PNG_NO_EASY_ACCESS) && !defined(PNG_EASY_ACCESS_SUPPORTED)
646# define PNG_EASY_ACCESS_SUPPORTED
647#endif
648
77aecce0 649/* PNG_ASSEMBLER_CODE was enabled by default in version 1.2.0
4946a942
GD		 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
75b6e0a0
GD		 658#endif
659
4946a942
GD		 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
5b02c8a1
VS		 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
75b6e0a0
GD		 691/* These are currently experimental features, define them if you want */
692
693/* very little testing */
694/*
4946a942
GD		 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
75b6e0a0
GD		 700*/
701
702/* This is only for PowerPC big-endian and 680x0 systems */
703/* some testing */
704/*
5b02c8a1
VS		 705#ifndef PNG_READ_BIG_ENDIAN_SUPPORTED
706# define PNG_READ_BIG_ENDIAN_SUPPORTED
4946a942
GD		 707#endif
708*/
709
710/* Buggy compilers (e.g., gcc 2.7.2.2) need this */
711/*
712#define PNG_NO_POINTER_INDEXING
75b6e0a0
GD		 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
4946a942
GD		 727#if defined(PNG_READ_SUPPORTED) && \
728 !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
75b6e0a0 729 !defined(PNG_NO_READ_ANCILLARY_CHUNKS)
4946a942 730# define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
75b6e0a0 731#endif
4946a942
GD		 732
733#if defined(PNG_WRITE_SUPPORTED) && \
734 !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
75b6e0a0 735 !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS)
4946a942 736# define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
75b6e0a0
GD		 737#endif
738
739#ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
4946a942
GD		 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
75b6e0a0 746#ifndef PNG_NO_READ_bKGD
4946a942
GD		 747# define PNG_READ_bKGD_SUPPORTED
748# define PNG_bKGD_SUPPORTED
75b6e0a0
GD		 749#endif
750#ifndef PNG_NO_READ_cHRM
4946a942
GD		 751# define PNG_READ_cHRM_SUPPORTED
752# define PNG_cHRM_SUPPORTED
75b6e0a0
GD		 753#endif
754#ifndef PNG_NO_READ_gAMA
4946a942
GD		 755# define PNG_READ_gAMA_SUPPORTED
756# define PNG_gAMA_SUPPORTED
75b6e0a0
GD		 757#endif
758#ifndef PNG_NO_READ_hIST
4946a942
GD		 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
75b6e0a0
GD		 773#endif
774#ifndef PNG_NO_READ_oFFs
4946a942
GD		 775# define PNG_READ_oFFs_SUPPORTED
776# define PNG_oFFs_SUPPORTED
75b6e0a0
GD		 777#endif
778#ifndef PNG_NO_READ_pCAL
4946a942
GD		 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
75b6e0a0
GD		 785#endif
786#ifndef PNG_NO_READ_pHYs
4946a942
GD		 787# define PNG_READ_pHYs_SUPPORTED
788# define PNG_pHYs_SUPPORTED
75b6e0a0
GD		 789#endif
790#ifndef PNG_NO_READ_sBIT
4946a942
GD		 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
75b6e0a0
GD		 797#endif
798#ifndef PNG_NO_READ_sRGB
4946a942
GD		 799# define PNG_READ_sRGB_SUPPORTED
800# define PNG_sRGB_SUPPORTED
75b6e0a0
GD		 801#endif
802#ifndef PNG_NO_READ_tEXt
4946a942
GD		 803# define PNG_READ_tEXt_SUPPORTED
804# define PNG_tEXt_SUPPORTED
75b6e0a0
GD		 805#endif
806#ifndef PNG_NO_READ_tIME
4946a942
GD		 807# define PNG_READ_tIME_SUPPORTED
808# define PNG_tIME_SUPPORTED
75b6e0a0
GD		 809#endif
810#ifndef PNG_NO_READ_tRNS
4946a942
GD		 811# define PNG_READ_tRNS_SUPPORTED
812# define PNG_tRNS_SUPPORTED
75b6e0a0
GD		 813#endif
814#ifndef PNG_NO_READ_zTXt
4946a942
GD		 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
75b6e0a0
GD		 837#endif
838#ifndef PNG_NO_READ_OPT_PLTE
4946a942
GD		 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
75b6e0a0
GD		 847#endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */
848
849#ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
4946a942
GD		 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
75b6e0a0 856#ifndef PNG_NO_WRITE_bKGD
4946a942
GD		 857# define PNG_WRITE_bKGD_SUPPORTED
858# ifndef PNG_bKGD_SUPPORTED
859# define PNG_bKGD_SUPPORTED
860# endif
75b6e0a0
GD		 861#endif
862#ifndef PNG_NO_WRITE_cHRM
4946a942
GD		 863# define PNG_WRITE_cHRM_SUPPORTED
864# ifndef PNG_cHRM_SUPPORTED
865# define PNG_cHRM_SUPPORTED
866# endif
75b6e0a0
GD		 867#endif
868#ifndef PNG_NO_WRITE_gAMA
4946a942
GD		 869# define PNG_WRITE_gAMA_SUPPORTED
870# ifndef PNG_gAMA_SUPPORTED
871# define PNG_gAMA_SUPPORTED
872# endif
75b6e0a0
GD		 873#endif
874#ifndef PNG_NO_WRITE_hIST
4946a942
GD		 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
75b6e0a0
GD		 893#endif
894#ifndef PNG_NO_WRITE_oFFs
4946a942
GD		 895# define PNG_WRITE_oFFs_SUPPORTED
896# ifndef PNG_oFFs_SUPPORTED
897# define PNG_oFFs_SUPPORTED
898# endif
75b6e0a0
GD		 899#endif
900#ifndef PNG_NO_WRITE_pCAL
4946a942
GD		 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
75b6e0a0
GD		 911#endif
912#ifndef PNG_NO_WRITE_pHYs
4946a942
GD		 913# define PNG_WRITE_pHYs_SUPPORTED
914# ifndef PNG_pHYs_SUPPORTED
915# define PNG_pHYs_SUPPORTED
916# endif
75b6e0a0
GD		 917#endif
918#ifndef PNG_NO_WRITE_sBIT
4946a942
GD		 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
75b6e0a0
GD		 929#endif
930#ifndef PNG_NO_WRITE_sRGB
4946a942
GD		 931# define PNG_WRITE_sRGB_SUPPORTED
932# ifndef PNG_sRGB_SUPPORTED
933# define PNG_sRGB_SUPPORTED
934# endif
75b6e0a0
GD		 935#endif
936#ifndef PNG_NO_WRITE_tEXt
4946a942
GD		 937# define PNG_WRITE_tEXt_SUPPORTED
938# ifndef PNG_tEXt_SUPPORTED
939# define PNG_tEXt_SUPPORTED
940# endif
75b6e0a0
GD		 941#endif
942#ifndef PNG_NO_WRITE_tIME
4946a942
GD		 943# define PNG_WRITE_tIME_SUPPORTED
944# ifndef PNG_tIME_SUPPORTED
945# define PNG_tIME_SUPPORTED
946# endif
75b6e0a0
GD		 947#endif
948#ifndef PNG_NO_WRITE_tRNS
4946a942
GD		 949# define PNG_WRITE_tRNS_SUPPORTED
950# ifndef PNG_tRNS_SUPPORTED
951# define PNG_tRNS_SUPPORTED
952# endif
75b6e0a0
GD		 953#endif
954#ifndef PNG_NO_WRITE_zTXt
4946a942
GD		 955# define PNG_WRITE_zTXt_SUPPORTED
956# ifndef PNG_zTXt_SUPPORTED
957# define PNG_zTXt_SUPPORTED
958# endif
75b6e0a0 959#endif
4946a942
GD		 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
75b6e0a0
GD		 979#endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */
980
4946a942
GD		 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
75b6e0a0 989/* need the time information for reading tIME chunks */
4946a942
GD		 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
75b6e0a0
GD		 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
1006typedef unsigned long png_uint_32;
1007typedef long png_int_32;
1008typedef unsigned short png_uint_16;
1009typedef short png_int_16;
1010typedef 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) */
5b02c8a1
VS		 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
75b6e0a0
GD		 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__
4946a942
GD		 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__ */
75b6e0a0
GD		 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)
4946a942
GD		 1065# define USE_FAR_KEYWORD
1066# define FARDATA FAR
1067# include <dos.h>
75b6e0a0
GD		 1068# endif
1069#endif
1070
1071/* SJT: default case */
1072#ifndef FAR
4946a942 1073# define FAR
75b6e0a0
GD		 1074#endif
1075
1076/* At this point FAR is always defined */
1077#ifndef FARDATA
4946a942 1078# define FARDATA
75b6e0a0
GD		 1079#endif
1080
4946a942
GD		 1081/* Typedef for floating-point numbers that are converted
1082 to fixed-point with a multiple of 100,000, e.g., int_gamma */
1083typedef png_int_32 png_fixed_point;
1084
75b6e0a0
GD		 1085/* Add typedefs for pointers */
1086typedef void FAR * png_voidp;
1087typedef png_byte FAR * png_bytep;
1088typedef png_uint_32 FAR * png_uint_32p;
1089typedef png_int_32 FAR * png_int_32p;
1090typedef png_uint_16 FAR * png_uint_16p;
1091typedef png_int_16 FAR * png_int_16p;
1092typedef PNG_CONST char FAR * png_const_charp;
1093typedef char FAR * png_charp;
4946a942
GD		 1094typedef png_fixed_point FAR * png_fixed_point_p;
1095
1096#ifndef PNG_NO_STDIO
1097#if defined(_WIN32_WCE)
1098typedef HANDLE png_FILE_p;
1099#else
1100typedef FILE * png_FILE_p;
1101#endif
1102#endif
1103
1104#ifdef PNG_FLOATING_POINT_SUPPORTED
75b6e0a0 1105typedef double FAR * png_doublep;
4946a942 1106#endif
75b6e0a0
GD		 1107
1108/* Pointers to pointers; i.e. arrays */
1109typedef png_byte FAR * FAR * png_bytepp;
1110typedef png_uint_32 FAR * FAR * png_uint_32pp;
1111typedef png_int_32 FAR * FAR * png_int_32pp;
1112typedef png_uint_16 FAR * FAR * png_uint_16pp;
1113typedef png_int_16 FAR * FAR * png_int_16pp;
1114typedef PNG_CONST char FAR * FAR * png_const_charpp;
1115typedef char FAR * FAR * png_charpp;
4946a942
GD		 1116typedef png_fixed_point FAR * FAR * png_fixed_point_pp;
1117#ifdef PNG_FLOATING_POINT_SUPPORTED
75b6e0a0 1118typedef double FAR * FAR * png_doublepp;
4946a942 1119#endif
75b6e0a0 1120
4946a942 1121/* Pointers to pointers to pointers; i.e., pointer to array */
75b6e0a0
GD		 1122typedef 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 */
1128typedef charf * png_zcharp;
1129typedef charf * FAR * png_zcharpp;
1130typedef z_stream FAR * png_zstreamp;
1131
4946a942
GD		 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
75b6e0a0
GD		 1175#endif
1176
4946a942
GD		 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
5283098e 1189#if defined(__CYGWIN__) || defined(__WINE__)
4946a942 1190# undef PNGAPI
5283098e
JS		 1191# if defined(__WINE__)
1192# define PNGAPI
1193# else
1194# define PNGAPI __cdecl
1195# endif
4946a942
GD		 1196# undef PNG_IMPEXP
1197# define PNG_IMPEXP
77aecce0 1198#endif
4946a942
GD		 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
4946a942
GD		 1207#if defined(__MINGW32__) && !defined(PNG_MODULEDEF)
1208# ifndef PNG_NO_MODULEDEF
1209# define PNG_NO_MODULEDEF
1210# endif
75b6e0a0
GD		 1211#endif
1212
4946a942
GD		 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
5b02c8a1
VS		 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
4946a942
GD		 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) */
5b02c8a1
VS		 1264# if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
1265# ifndef PNGAPI
1266# define PNGAPI _System
1267# endif
1268# else
4946a942 1269# if 0 /* ... other platforms, with other meanings */
4946a942
GD		 1270# endif
1271# endif
1272#endif
4946a942 1273
77aecce0 1274#if defined(__VISAGECPP__)
77ffb593 1275/* I don't compile with this _System linkage for wxWidgets */
77aecce0
DW		 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
1285extern const char png_libpng_ver[18];
1286#endif
1287
4946a942
GD		 1288#ifndef PNGAPI
1289# define PNGAPI
1290#endif
1291#ifndef PNG_IMPEXP
1292# define PNG_IMPEXP
75b6e0a0
GD		 1293#endif
1294
1295#ifndef PNG_EXPORT
4946a942 1296# define PNG_EXPORT(type,symbol) PNG_IMPEXP type PNGAPI symbol
75b6e0a0
GD		 1297#endif
1298
4946a942
GD		 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
75b6e0a0 1304
4946a942
GD		 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.
75b6e0a0
GD		 1307 */
1308
4946a942
GD		 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
75b6e0a0
GD		 1320#if defined(USE_FAR_KEYWORD) /* memory model independent fns */
1321/* use this to make far-to-near assignments */
4946a942
GD		 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))
5b02c8a1
VS		 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
75b6e0a0 1332#else /* use the usual functions */
4946a942
GD		 1333# define CVT_PTR(ptr) (ptr)
1334# define CVT_PTR_NOCHECK(ptr) (ptr)
5b02c8a1
VS		 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
75b6e0a0
GD		 1341#endif
1342/* End of memory model independent support */
1343
4946a942 1344/* Just a little check that someone hasn't tried to define something
75b6e0a0
GD		 1345 * contradictory.
1346 */
5b02c8a1 1347#if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K)
4946a942 1348# undef PNG_ZBUF_SIZE
5b02c8a1 1349# define PNG_ZBUF_SIZE 65536L
4946a942
GD		 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
77aecce0 1366# define PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT 9 /* >= */
75b6e0a0
GD		 1367#endif
1368
4946a942
GD		 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
75b6e0a0
GD		 1393#endif /* PNGCONF_H */
1394
wxWidgets (Impactor)