source: trunk/src/3rdparty/libpng/pngconf.h@ 1058

Last change on this file since 1058 was 846, checked in by Dmitry A. Kuminov, 14 years ago

trunk: Merged in qt 4.7.2 sources from branches/vendor/nokia/qt.
File size: 44.3 KB
Line 
1
2/* pngconf.h - machine configurable file for libpng
3 *
4 * libpng version 1.4.0 - January 3, 2010
5 * For conditions of distribution and use, see copyright notice in png.h
6 * Copyright (c) 1998-2010 Glenn Randers-Pehrson
7 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
8 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
9 *
10 * This code is released under the libpng license.
11 * For conditions of distribution and use, see the disclaimer
12 * and license in png.h
13 *
14 */
15
16/* Any machine specific code is near the front of this file, so if you
17 * are configuring libpng for a machine, you may want to read the section
18 * starting here down to where it starts to typedef png_color, png_text,
19 * and png_info.
20 */
21
22#ifndef PNGCONF_H
23#define PNGCONF_H
24
25#ifndef PNG_NO_LIMITS_H
26# include <limits.h>
27#endif
28
29/* Added at libpng-1.2.9 */
30
31/* config.h is created by and PNG_CONFIGURE_LIBPNG is set by the "configure" script. */
32#ifdef PNG_CONFIGURE_LIBPNG
33# ifdef HAVE_CONFIG_H
34# include "config.h"
35# endif
36#endif
37
38/*
39 * Added at libpng-1.2.8
40 *
41 * PNG_USER_CONFIG has to be defined on the compiler command line. This
42 * includes the resource compiler for Windows DLL configurations.
43 */
44#ifdef PNG_USER_CONFIG
45# ifndef PNG_USER_PRIVATEBUILD
46# define PNG_USER_PRIVATEBUILD
47# endif
48# include "pngusr.h"
49#endif
50
51/*
52 * If you create a private DLL you need to define in "pngusr.h" the followings:
53 * #define PNG_USER_PRIVATEBUILD <Describes by whom and why this version of
54 * the DLL was built>
55 * e.g. #define PNG_USER_PRIVATEBUILD "Build by MyCompany for xyz reasons."
56 * #define PNG_USER_DLLFNAME_POSTFIX <two-letter postfix that serve to
57 * distinguish your DLL from those of the official release. These
58 * correspond to the trailing letters that come after the version
59 * number and must match your private DLL name>
60 * e.g. // private DLL "libpng13gx.dll"
61 * #define PNG_USER_DLLFNAME_POSTFIX "gx"
62 *
63 * The following macros are also at your disposal if you want to complete the
64 * DLL VERSIONINFO structure.
65 * - PNG_USER_VERSIONINFO_COMMENTS
66 * - PNG_USER_VERSIONINFO_COMPANYNAME
67 * - PNG_USER_VERSIONINFO_LEGALTRADEMARKS
68 */
69
70#ifdef __STDC__
71# ifdef SPECIALBUILD
72# pragma message("PNG_LIBPNG_SPECIALBUILD (and deprecated SPECIALBUILD)\
73 are now LIBPNG reserved macros. Use PNG_USER_PRIVATEBUILD instead.")
74# endif
75
76# ifdef PRIVATEBUILD
77# pragma message("PRIVATEBUILD is deprecated.\
78 Use PNG_USER_PRIVATEBUILD instead.")
79# define PNG_USER_PRIVATEBUILD PRIVATEBUILD
80# endif
81#endif /* __STDC__ */
82
83/* End of material added to libpng-1.2.8 */
84
85#ifndef PNG_VERSION_INFO_ONLY
86
87/* This is the size of the compression buffer, and thus the size of
88 * an IDAT chunk. Make this whatever size you feel is best for your
89 * machine. One of these will be allocated per png_struct. When this
90 * is full, it writes the data to the disk, and does some other
91 * calculations. Making this an extremely small size will slow
92 * the library down, but you may want to experiment to determine
93 * where it becomes significant, if you are concerned with memory
94 * usage. Note that zlib allocates at least 32Kb also. For readers,
95 * this describes the size of the buffer available to read the data in.
96 * Unless this gets smaller than the size of a row (compressed),
97 * it should not make much difference how big this is.
98 */
99
100#ifndef PNG_ZBUF_SIZE
101# define PNG_ZBUF_SIZE 8192
102#endif
103
104/* Enable if you want a write-only libpng */
105
106#ifndef PNG_NO_READ_SUPPORTED
107# define PNG_READ_SUPPORTED
108#endif
109
110/* Enable if you want a read-only libpng */
111
112#ifndef PNG_NO_WRITE_SUPPORTED
113# define PNG_WRITE_SUPPORTED
114#endif
115
116/* Enabled in 1.4.0. */
117#ifdef PNG_ALLOW_BENIGN_ERRORS
118# define png_benign_error png_warning
119# define png_chunk_benign_error png_chunk_warning
120#else
121# ifndef PNG_BENIGN_ERRORS_SUPPORTED
122# define png_benign_error png_error
123# define png_chunk_benign_error png_chunk_error
124# endif
125#endif
126
127/* Added at libpng version 1.4.0 */
128#if !defined(PNG_NO_WARNINGS) && !defined(PNG_WARNINGS_SUPPORTED)
129# define PNG_WARNINGS_SUPPORTED
130#endif
131
132/* Added at libpng version 1.4.0 */
133#if !defined(PNG_NO_ERROR_TEXT) && !defined(PNG_ERROR_TEXT_SUPPORTED)
134# define PNG_ERROR_TEXT_SUPPORTED
135#endif
136
137/* Added at libpng version 1.4.0 */
138#if !defined(PNG_NO_CHECK_cHRM) && !defined(PNG_CHECK_cHRM_SUPPORTED)
139# define PNG_CHECK_cHRM_SUPPORTED
140#endif
141
142/* Added at libpng version 1.4.0 */
143#if !defined(PNG_NO_ALIGNED_MEMORY) && !defined(PNG_ALIGNED_MEMORY_SUPPORTED)
144# define PNG_ALIGNED_MEMORY_SUPPORTED
145#endif
146
147/* Enabled by default in 1.2.0. You can disable this if you don't need to
148 support PNGs that are embedded in MNG datastreams */
149#ifndef PNG_NO_MNG_FEATURES
150# ifndef PNG_MNG_FEATURES_SUPPORTED
151# define PNG_MNG_FEATURES_SUPPORTED
152# endif
153#endif
154
155/* Added at libpng version 1.4.0 */
156#ifndef PNG_NO_FLOATING_POINT_SUPPORTED
157# ifndef PNG_FLOATING_POINT_SUPPORTED
158# define PNG_FLOATING_POINT_SUPPORTED
159# endif
160#endif
161
162/* Added at libpng-1.4.0beta49 for testing (this test is no longer used
163 in libpng and png_calloc() is always present)
164 */
165#define PNG_CALLOC_SUPPORTED
166
167/* If you are running on a machine where you cannot allocate more
168 * than 64K of memory at once, uncomment this. While libpng will not
169 * normally need that much memory in a chunk (unless you load up a very
170 * large file), zlib needs to know how big of a chunk it can use, and
171 * libpng thus makes sure to check any memory allocation to verify it
172 * will fit into memory.
173#define PNG_MAX_MALLOC_64K
174 */
175#if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
176# define PNG_MAX_MALLOC_64K
177#endif
178
179/* Special munging to support doing things the 'cygwin' way:
180 * 'Normal' png-on-win32 defines/defaults:
181 * PNG_BUILD_DLL -- building dll
182 * PNG_USE_DLL -- building an application, linking to dll
183 * (no define) -- building static library, or building an
184 * application and linking to the static lib
185 * 'Cygwin' defines/defaults:
186 * PNG_BUILD_DLL -- (ignored) building the dll
187 * (no define) -- (ignored) building an application, linking to the dll
188 * PNG_STATIC -- (ignored) building the static lib, or building an
189 * application that links to the static lib.
190 * ALL_STATIC -- (ignored) building various static libs, or building an
191 * application that links to the static libs.
192 * Thus,
193 * a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and
194 * this bit of #ifdefs will define the 'correct' config variables based on
195 * that. If a cygwin user *wants* to define 'PNG_USE_DLL' that's okay, but
196 * unnecessary.
197 *
198 * Also, the precedence order is:
199 * ALL_STATIC (since we can't #undef something outside our namespace)
200 * PNG_BUILD_DLL
201 * PNG_STATIC
202 * (nothing) == PNG_USE_DLL
203 *
204 * CYGWIN (2002-01-20): The preceding is now obsolete. With the advent
205 * of auto-import in binutils, we no longer need to worry about
206 * __declspec(dllexport) / __declspec(dllimport) and friends. Therefore,
207 * we don't need to worry about PNG_STATIC or ALL_STATIC when it comes
208 * to __declspec() stuff. However, we DO need to worry about
209 * PNG_BUILD_DLL and PNG_STATIC because those change some defaults
210 * such as CONSOLE_IO.
211 */
212#ifdef __CYGWIN__
213# ifdef ALL_STATIC
214# ifdef PNG_BUILD_DLL
215# undef PNG_BUILD_DLL
216# endif
217# ifdef PNG_USE_DLL
218# undef PNG_USE_DLL
219# endif
220# ifdef PNG_DLL
221# undef PNG_DLL
222# endif
223# ifndef PNG_STATIC
224# define PNG_STATIC
225# endif
226# else
227# ifdef PNG_BUILD_DLL
228# ifdef PNG_STATIC
229# undef PNG_STATIC
230# endif
231# ifdef PNG_USE_DLL
232# undef PNG_USE_DLL
233# endif
234# ifndef PNG_DLL
235# define PNG_DLL
236# endif
237# else
238# ifdef PNG_STATIC
239# ifdef PNG_USE_DLL
240# undef PNG_USE_DLL
241# endif
242# ifdef PNG_DLL
243# undef PNG_DLL
244# endif
245# else
246# ifndef PNG_USE_DLL
247# define PNG_USE_DLL
248# endif
249# ifndef PNG_DLL
250# define PNG_DLL
251# endif
252# endif
253# endif
254# endif
255#endif
256
257/* This protects us against compilers that run on a windowing system
258 * and thus don't have or would rather us not use the stdio types:
259 * stdin, stdout, and stderr. The only one currently used is stderr
260 * in png_error() and png_warning(). #defining PNG_NO_CONSOLE_IO will
261 * prevent these from being compiled and used. #defining PNG_NO_STDIO
262 * will also prevent these, plus will prevent the entire set of stdio
263 * macros and functions (FILE *, printf, etc.) from being compiled and used,
264 * unless (PNG_DEBUG > 0) has been #defined.
265 *
266 * #define PNG_NO_CONSOLE_IO
267 * #define PNG_NO_STDIO
268 */
269
270#if !defined(PNG_NO_STDIO) && !defined(PNG_STDIO_SUPPORTED)
271# define PNG_STDIO_SUPPORTED
272#endif
273
274
275#ifdef PNG_BUILD_DLL
276# if !defined(PNG_CONSOLE_IO_SUPPORTED) && !defined(PNG_NO_CONSOLE_IO)
277# define PNG_NO_CONSOLE_IO
278# endif
279#endif
280
281# ifdef PNG_NO_STDIO
282# ifndef PNG_NO_CONSOLE_IO
283# define PNG_NO_CONSOLE_IO
284# endif
285# ifdef PNG_DEBUG
286# if (PNG_DEBUG > 0)
287# include <stdio.h>
288# endif
289# endif
290# else
291# include <stdio.h>
292# endif
293
294#if !(defined PNG_NO_CONSOLE_IO) && !defined(PNG_CONSOLE_IO_SUPPORTED)
295# define PNG_CONSOLE_IO_SUPPORTED
296#endif
297
298/* This macro protects us against machines that don't have function
299 * prototypes (ie K&R style headers). If your compiler does not handle
300 * function prototypes, define this macro and use the included ansi2knr.
301 * I've always been able to use _NO_PROTO as the indicator, but you may
302 * need to drag the empty declaration out in front of here, or change the
303 * ifdef to suit your own needs.
304 */
305#ifndef PNGARG
306
307#ifdef OF /* zlib prototype munger */
308# define PNGARG(arglist) OF(arglist)
309#else
310
311#ifdef _NO_PROTO
312# define PNGARG(arglist) ()
313#else
314# define PNGARG(arglist) arglist
315#endif /* _NO_PROTO */
316
317#endif /* OF */
318
319#endif /* PNGARG */
320
321/* Try to determine if we are compiling on a Mac. Note that testing for
322 * just __MWERKS__ is not good enough, because the Codewarrior is now used
323 * on non-Mac platforms.
324 */
325#ifndef MACOS
326# if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
327 defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC)
328# define MACOS
329# endif
330#endif
331
332/* Enough people need this for various reasons to include it here */
333#if !defined(MACOS) && !defined(RISCOS) && !defined(_WIN32_WCE)
334# include <sys/types.h>
335#endif
336
337/* PNG_SETJMP_NOT_SUPPORTED and PNG_NO_SETJMP_SUPPORTED are deprecated. */
338#if !defined(PNG_NO_SETJMP) && \
339 !defined(PNG_SETJMP_NOT_SUPPORTED) && !defined(PNG_NO_SETJMP_SUPPORTED)
340# define PNG_SETJMP_SUPPORTED
341#endif
342
343#ifdef PNG_SETJMP_SUPPORTED
344/* This is an attempt to force a single setjmp behaviour on Linux. If
345 * the X config stuff didn't define _BSD_SOURCE we wouldn't need this.
346 *
347 * You can bypass this test if you know that your application uses exactly
348 * the same setjmp.h that was included when libpng was built. Only define
349 * PNG_SKIP_SETJMP_CHECK while building your application, prior to the
350 * application's '#include "png.h"'. Don't define PNG_SKIP_SETJMP_CHECK
351 * while building a separate libpng library for general use.
352 */
353
354# ifndef PNG_SKIP_SETJMP_CHECK
355# ifdef __linux__
356# ifdef _BSD_SOURCE
357# define PNG_SAVE_BSD_SOURCE
358# undef _BSD_SOURCE
359# endif
360# ifdef _SETJMP_H
361 /* If you encounter a compiler error here, see the explanation
362 * near the end of INSTALL.
363 */
364 __pngconf.h__ in libpng already includes setjmp.h;
365 __dont__ include it again.;
366# endif
367# endif /* __linux__ */
368# endif /* PNG_SKIP_SETJMP_CHECK */
369
370 /* Include setjmp.h for error handling */
371# include <setjmp.h>
372
373# ifdef __linux__
374# ifdef PNG_SAVE_BSD_SOURCE
375# ifdef _BSD_SOURCE
376# undef _BSD_SOURCE
377# endif
378# define _BSD_SOURCE
379# undef PNG_SAVE_BSD_SOURCE
380# endif
381# endif /* __linux__ */
382#endif /* PNG_SETJMP_SUPPORTED */
383
384#if defined(BSD) && !defined(VXWORKS)
385# include <strings.h>
386#else
387# include <string.h>
388#endif
389
390/* Other defines for things like memory and the like can go here. */
391
392/* This controls how fine the dithering gets. As this allocates
393 * a largish chunk of memory (32K), those who are not as concerned
394 * with dithering quality can decrease some or all of these.
395 */
396#ifndef PNG_DITHER_RED_BITS
397# define PNG_DITHER_RED_BITS 5
398#endif
399#ifndef PNG_DITHER_GREEN_BITS
400# define PNG_DITHER_GREEN_BITS 5
401#endif
402#ifndef PNG_DITHER_BLUE_BITS
403# define PNG_DITHER_BLUE_BITS 5
404#endif
405
406/* This controls how fine the gamma correction becomes when you
407 * are only interested in 8 bits anyway. Increasing this value
408 * results in more memory being used, and more pow() functions
409 * being called to fill in the gamma tables. Don't set this value
410 * less then 8, and even that may not work (I haven't tested it).
411 */
412
413#ifndef PNG_MAX_GAMMA_8
414# define PNG_MAX_GAMMA_8 11
415#endif
416
417/* This controls how much a difference in gamma we can tolerate before
418 * we actually start doing gamma conversion.
419 */
420#ifndef PNG_GAMMA_THRESHOLD
421# define PNG_GAMMA_THRESHOLD 0.05
422#endif
423
424/* The following uses const char * instead of char * for error
425 * and warning message functions, so some compilers won't complain.
426 * If you do not want to use const, define PNG_NO_CONST here.
427 */
428
429#ifndef PNG_CONST
430# ifndef PNG_NO_CONST
431# define PNG_CONST const
432# else
433# define PNG_CONST
434# endif
435#endif
436
437/* The following defines give you the ability to remove code from the
438 * library that you will not be using. I wish I could figure out how to
439 * automate this, but I can't do that without making it seriously hard
440 * on the users. So if you are not using an ability, change the #define
441 * to and #undef, and that part of the library will not be compiled. If
442 * your linker can't find a function, you may want to make sure the
443 * ability is defined here. Some of these depend upon some others being
444 * defined. I haven't figured out all the interactions here, so you may
445 * have to experiment awhile to get everything to compile. If you are
446 * creating or using a shared library, you probably shouldn't touch this,
447 * as it will affect the size of the structures, and this will cause bad
448 * things to happen if the library and/or application ever change.
449 */
450
451/* Any features you will not be using can be undef'ed here */
452
453/* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user
454 * to turn it off with PNG_NO_READ|WRITE_TRANSFORMS on the compile line,
455 * then pick and choose which ones to define without having to edit this
456 * file. It is safe to use the PNG_NO_READ|WRITE_TRANSFORMS
457 * if you only want to have a png-compliant reader/writer but don't need
458 * any of the extra transformations. This saves about 80 kbytes in a
459 * typical installation of the library. (PNG_NO_* form added in version
460 * 1.0.1c, for consistency; PNG_*_TRANSFORMS_NOT_SUPPORTED deprecated in
461 * 1.4.0)
462 */
463
464/* Ignore attempt to turn off both floating and fixed point support */
465#if !defined(PNG_FLOATING_POINT_SUPPORTED) || \
466 !defined(PNG_NO_FIXED_POINT_SUPPORTED)
467# define PNG_FIXED_POINT_SUPPORTED
468#endif
469
470#ifdef PNG_READ_SUPPORTED
471
472/* PNG_READ_TRANSFORMS_NOT_SUPPORTED is deprecated. */
473#if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \
474 !defined(PNG_NO_READ_TRANSFORMS)
475# define PNG_READ_TRANSFORMS_SUPPORTED
476#endif
477
478#ifdef PNG_READ_TRANSFORMS_SUPPORTED
479# ifndef PNG_NO_READ_EXPAND
480# define PNG_READ_EXPAND_SUPPORTED
481# endif
482# ifndef PNG_NO_READ_SHIFT
483# define PNG_READ_SHIFT_SUPPORTED
484# endif
485# ifndef PNG_NO_READ_PACK
486# define PNG_READ_PACK_SUPPORTED
487# endif
488# ifndef PNG_NO_READ_BGR
489# define PNG_READ_BGR_SUPPORTED
490# endif
491# ifndef PNG_NO_READ_SWAP
492# define PNG_READ_SWAP_SUPPORTED
493# endif
494# ifndef PNG_NO_READ_PACKSWAP
495# define PNG_READ_PACKSWAP_SUPPORTED
496# endif
497# ifndef PNG_NO_READ_INVERT
498# define PNG_READ_INVERT_SUPPORTED
499# endif
500#if 0 /* removed from libpng-1.4.0 */
501# ifndef PNG_NO_READ_DITHER
502# define PNG_READ_DITHER_SUPPORTED
503# endif
504#endif /* 0 */
505# ifndef PNG_NO_READ_BACKGROUND
506# define PNG_READ_BACKGROUND_SUPPORTED
507# endif
508# ifndef PNG_NO_READ_16_TO_8
509# define PNG_READ_16_TO_8_SUPPORTED
510# endif
511# ifndef PNG_NO_READ_FILLER
512# define PNG_READ_FILLER_SUPPORTED
513# endif
514# ifndef PNG_NO_READ_GAMMA
515# define PNG_READ_GAMMA_SUPPORTED
516# endif
517# ifndef PNG_NO_READ_GRAY_TO_RGB
518# define PNG_READ_GRAY_TO_RGB_SUPPORTED
519# endif
520# ifndef PNG_NO_READ_SWAP_ALPHA
521# define PNG_READ_SWAP_ALPHA_SUPPORTED
522# endif
523# ifndef PNG_NO_READ_INVERT_ALPHA
524# define PNG_READ_INVERT_ALPHA_SUPPORTED
525# endif
526# ifndef PNG_NO_READ_STRIP_ALPHA
527# define PNG_READ_STRIP_ALPHA_SUPPORTED
528# endif
529# ifndef PNG_NO_READ_USER_TRANSFORM
530# define PNG_READ_USER_TRANSFORM_SUPPORTED
531# endif
532# ifndef PNG_NO_READ_RGB_TO_GRAY
533# define PNG_READ_RGB_TO_GRAY_SUPPORTED
534# endif
535#endif /* PNG_READ_TRANSFORMS_SUPPORTED */
536
537/* PNG_PROGRESSIVE_READ_NOT_SUPPORTED is deprecated. */
538#if !defined(PNG_NO_PROGRESSIVE_READ) && \
539 !defined(PNG_PROGRESSIVE_READ_NOT_SUPPORTED) /* if you don't do progressive */
540# define PNG_PROGRESSIVE_READ_SUPPORTED /* reading. This is not talking */
541#endif /* about interlacing capability! You'll */
542 /* still have interlacing unless you change the following define: */
543
544#define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */
545
546/* PNG_NO_SEQUENTIAL_READ_SUPPORTED is deprecated. */
547#if !defined(PNG_NO_SEQUENTIAL_READ) && \
548 !defined(PNG_SEQUENTIAL_READ_SUPPORTED) && \
549 !defined(PNG_NO_SEQUENTIAL_READ_SUPPORTED)
550# define PNG_SEQUENTIAL_READ_SUPPORTED
551#endif
552
553#ifndef PNG_NO_READ_COMPOSITE_NODIV
554# ifndef PNG_NO_READ_COMPOSITED_NODIV /* libpng-1.0.x misspelling */
555# define PNG_READ_COMPOSITE_NODIV_SUPPORTED /* well tested on Intel, SGI */
556# endif
557#endif
558
559#if !defined(PNG_NO_GET_INT_32) || defined(PNG_READ_oFFS_SUPPORTED) || \
560 defined(PNG_READ_pCAL_SUPPORTED)
561# ifndef PNG_GET_INT_32_SUPPORTED
562# define PNG_GET_INT_32_SUPPORTED
563# endif
564#endif
565
566#endif /* PNG_READ_SUPPORTED */
567
568#ifdef PNG_WRITE_SUPPORTED
569
570/* PNG_WRITE_TRANSFORMS_NOT_SUPPORTED is deprecated. */
571#if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \
572 !defined(PNG_NO_WRITE_TRANSFORMS)
573# define PNG_WRITE_TRANSFORMS_SUPPORTED
574#endif
575
576#ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
577# ifndef PNG_NO_WRITE_SHIFT
578# define PNG_WRITE_SHIFT_SUPPORTED
579# endif
580# ifndef PNG_NO_WRITE_PACK
581# define PNG_WRITE_PACK_SUPPORTED
582# endif
583# ifndef PNG_NO_WRITE_BGR
584# define PNG_WRITE_BGR_SUPPORTED
585# endif
586# ifndef PNG_NO_WRITE_SWAP
587# define PNG_WRITE_SWAP_SUPPORTED
588# endif
589# ifndef PNG_NO_WRITE_PACKSWAP
590# define PNG_WRITE_PACKSWAP_SUPPORTED
591# endif
592# ifndef PNG_NO_WRITE_INVERT
593# define PNG_WRITE_INVERT_SUPPORTED
594# endif
595# ifndef PNG_NO_WRITE_FILLER
596# define PNG_WRITE_FILLER_SUPPORTED /* same as WRITE_STRIP_ALPHA */
597# endif
598# ifndef PNG_NO_WRITE_SWAP_ALPHA
599# define PNG_WRITE_SWAP_ALPHA_SUPPORTED
600# endif
601# ifndef PNG_NO_WRITE_INVERT_ALPHA
602# define PNG_WRITE_INVERT_ALPHA_SUPPORTED
603# endif
604# ifndef PNG_NO_WRITE_USER_TRANSFORM
605# define PNG_WRITE_USER_TRANSFORM_SUPPORTED
606# endif
607#endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */
608
609#if !defined(PNG_NO_WRITE_INTERLACING_SUPPORTED) && \
610 !defined(PNG_WRITE_INTERLACING_SUPPORTED)
611 /* This is not required for PNG-compliant encoders, but can cause
612 * trouble if left undefined
613 */
614# define PNG_WRITE_INTERLACING_SUPPORTED
615#endif
616
617#if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \
618 !defined(PNG_WRITE_WEIGHTED_FILTER) && \
619 defined(PNG_FLOATING_POINT_SUPPORTED)
620# define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
621#endif
622
623#ifndef PNG_NO_WRITE_FLUSH
624# define PNG_WRITE_FLUSH_SUPPORTED
625#endif
626
627#if !defined(PNG_NO_SAVE_INT_32) || defined(PNG_WRITE_oFFS_SUPPORTED) || \
628 defined(PNG_WRITE_pCAL_SUPPORTED)
629# ifndef PNG_SAVE_INT_32_SUPPORTED
630# define PNG_SAVE_INT_32_SUPPORTED
631# endif
632#endif
633
634#endif /* PNG_WRITE_SUPPORTED */
635
636#define PNG_NO_ERROR_NUMBERS
637
638#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
639 defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
640# ifndef PNG_NO_USER_TRANSFORM_PTR
641# define PNG_USER_TRANSFORM_PTR_SUPPORTED
642# endif
643#endif
644
645#if defined(PNG_STDIO_SUPPORTED) && !defined(PNG_TIME_RFC1123_SUPPORTED)
646# define PNG_TIME_RFC1123_SUPPORTED
647#endif
648
649/* This adds extra functions in pngget.c for accessing data from the
650 * info pointer (added in version 0.99)
651 * png_get_image_width()
652 * png_get_image_height()
653 * png_get_bit_depth()
654 * png_get_color_type()
655 * png_get_compression_type()
656 * png_get_filter_type()
657 * png_get_interlace_type()
658 * png_get_pixel_aspect_ratio()
659 * png_get_pixels_per_meter()
660 * png_get_x_offset_pixels()
661 * png_get_y_offset_pixels()
662 * png_get_x_offset_microns()
663 * png_get_y_offset_microns()
664 */
665#if !defined(PNG_NO_EASY_ACCESS) && !defined(PNG_EASY_ACCESS_SUPPORTED)
666# define PNG_EASY_ACCESS_SUPPORTED
667#endif
668
669/* Added at libpng-1.2.0 */
670#if !defined(PNG_NO_USER_MEM) && !defined(PNG_USER_MEM_SUPPORTED)
671# define PNG_USER_MEM_SUPPORTED
672#endif
673
674/* Added at libpng-1.2.6 */
675#ifndef PNG_SET_USER_LIMITS_SUPPORTED
676# ifndef PNG_NO_SET_USER_LIMITS
677# define PNG_SET_USER_LIMITS_SUPPORTED
678# endif
679#endif
680
681/* Added at libpng-1.0.16 and 1.2.6. To accept all valid PNGs no matter
682 * how large, set these limits to 0x7fffffffL
683 */
684#ifndef PNG_USER_WIDTH_MAX
685# define PNG_USER_WIDTH_MAX 1000000L
686#endif
687#ifndef PNG_USER_HEIGHT_MAX
688# define PNG_USER_HEIGHT_MAX 1000000L
689#endif
690
691/* Added at libpng-1.4.0 */
692#ifndef PNG_USER_CHUNK_CACHE_MAX
693# define PNG_USER_CHUNK_CACHE_MAX 0x7fffffffL
694#endif
695
696/* Added at libpng-1.4.0 */
697#if !defined(PNG_NO_IO_STATE) && !defined(PNG_IO_STATE_SUPPORTED)
698# define PNG_IO_STATE_SUPPORTED
699#endif
700
701#ifndef PNG_LITERAL_SHARP
702# define PNG_LITERAL_SHARP 0x23
703#endif
704#ifndef PNG_LITERAL_LEFT_SQUARE_BRACKET
705# define PNG_LITERAL_LEFT_SQUARE_BRACKET 0x5b
706#endif
707#ifndef PNG_LITERAL_RIGHT_SQUARE_BRACKET
708# define PNG_LITERAL_RIGHT_SQUARE_BRACKET 0x5d
709#endif
710#ifndef PNG_STRING_NEWLINE
711#define PNG_STRING_NEWLINE "\n"
712#endif
713
714/* These are currently experimental features, define them if you want */
715
716/* Very little testing */
717/*
718#ifdef PNG_READ_SUPPORTED
719# ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
720# define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
721# endif
722#endif
723*/
724
725/* This is only for PowerPC big-endian and 680x0 systems */
726/* some testing */
727/*
728#ifndef PNG_READ_BIG_ENDIAN_SUPPORTED
729# define PNG_READ_BIG_ENDIAN_SUPPORTED
730#endif
731*/
732
733#if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS)
734# define PNG_USE_READ_MACROS
735#endif
736
737/* Buggy compilers (e.g., gcc 2.7.2.2) need PNG_NO_POINTER_INDEXING */
738
739#if !defined(PNG_NO_POINTER_INDEXING) && \
740 !defined(PNG_POINTER_INDEXING_SUPPORTED)
741# define PNG_POINTER_INDEXING_SUPPORTED
742#endif
743
744
745/* Any chunks you are not interested in, you can undef here. The
746 * ones that allocate memory may be expecially important (hIST,
747 * tEXt, zTXt, tRNS, pCAL). Others will just save time and make png_info
748 * a bit smaller.
749 */
750
751/* The size of the png_text structure changed in libpng-1.0.6 when
752 * iTXt support was added. iTXt support was turned off by default through
753 * libpng-1.2.x, to support old apps that malloc the png_text structure
754 * instead of calling png_set_text() and letting libpng malloc it. It
755 * was turned on by default in libpng-1.4.0.
756 */
757
758/* PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED is deprecated. */
759#if defined(PNG_READ_SUPPORTED) && \
760 !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
761 !defined(PNG_NO_READ_ANCILLARY_CHUNKS)
762# define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
763#endif
764
765/* PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED is deprecated. */
766#if defined(PNG_WRITE_SUPPORTED) && \
767 !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
768 !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS)
769# define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
770#endif
771
772#ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
773
774#ifdef PNG_NO_READ_TEXT
775# define PNG_NO_READ_iTXt
776# define PNG_NO_READ_tEXt
777# define PNG_NO_READ_zTXt
778#endif
779
780#ifndef PNG_NO_READ_bKGD
781# define PNG_READ_bKGD_SUPPORTED
782# define PNG_bKGD_SUPPORTED
783#endif
784#ifndef PNG_NO_READ_cHRM
785# define PNG_READ_cHRM_SUPPORTED
786# define PNG_cHRM_SUPPORTED
787#endif
788#ifndef PNG_NO_READ_gAMA
789# define PNG_READ_gAMA_SUPPORTED
790# define PNG_gAMA_SUPPORTED
791#endif
792#ifndef PNG_NO_READ_hIST
793# define PNG_READ_hIST_SUPPORTED
794# define PNG_hIST_SUPPORTED
795#endif
796#ifndef PNG_NO_READ_iCCP
797# define PNG_READ_iCCP_SUPPORTED
798# define PNG_iCCP_SUPPORTED
799#endif
800#ifndef PNG_NO_READ_iTXt
801# ifndef PNG_READ_iTXt_SUPPORTED
802# define PNG_READ_iTXt_SUPPORTED
803# endif
804# ifndef PNG_iTXt_SUPPORTED
805# define PNG_iTXt_SUPPORTED
806# endif
807#endif
808#ifndef PNG_NO_READ_oFFs
809# define PNG_READ_oFFs_SUPPORTED
810# define PNG_oFFs_SUPPORTED
811#endif
812#ifndef PNG_NO_READ_pCAL
813# define PNG_READ_pCAL_SUPPORTED
814# define PNG_pCAL_SUPPORTED
815#endif
816#ifndef PNG_NO_READ_sCAL
817# define PNG_READ_sCAL_SUPPORTED
818# define PNG_sCAL_SUPPORTED
819#endif
820#ifndef PNG_NO_READ_pHYs
821# define PNG_READ_pHYs_SUPPORTED
822# define PNG_pHYs_SUPPORTED
823#endif
824#ifndef PNG_NO_READ_sBIT
825# define PNG_READ_sBIT_SUPPORTED
826# define PNG_sBIT_SUPPORTED
827#endif
828#ifndef PNG_NO_READ_sPLT
829# define PNG_READ_sPLT_SUPPORTED
830# define PNG_sPLT_SUPPORTED
831#endif
832#ifndef PNG_NO_READ_sRGB
833# define PNG_READ_sRGB_SUPPORTED
834# define PNG_sRGB_SUPPORTED
835#endif
836#ifndef PNG_NO_READ_tEXt
837# define PNG_READ_tEXt_SUPPORTED
838# define PNG_tEXt_SUPPORTED
839#endif
840#ifndef PNG_NO_READ_tIME
841# define PNG_READ_tIME_SUPPORTED
842# define PNG_tIME_SUPPORTED
843#endif
844#ifndef PNG_NO_READ_tRNS
845# define PNG_READ_tRNS_SUPPORTED
846# define PNG_tRNS_SUPPORTED
847#endif
848#ifndef PNG_NO_READ_zTXt
849# define PNG_READ_zTXt_SUPPORTED
850# define PNG_zTXt_SUPPORTED
851#endif
852#ifndef PNG_NO_READ_OPT_PLTE
853# define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */
854#endif /* optional PLTE chunk in RGB and RGBA images */
855#if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \
856 defined(PNG_READ_zTXt_SUPPORTED)
857# define PNG_READ_TEXT_SUPPORTED
858# define PNG_TEXT_SUPPORTED
859#endif
860
861#endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */
862
863#ifndef PNG_NO_READ_UNKNOWN_CHUNKS
864# define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
865# ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
866# define PNG_UNKNOWN_CHUNKS_SUPPORTED
867# endif
868#endif
869#if !defined(PNG_NO_READ_USER_CHUNKS) && \
870 defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
871# define PNG_READ_USER_CHUNKS_SUPPORTED
872# define PNG_USER_CHUNKS_SUPPORTED
873# ifdef PNG_NO_READ_UNKNOWN_CHUNKS
874# undef PNG_NO_READ_UNKNOWN_CHUNKS
875# endif
876# ifdef PNG_NO_HANDLE_AS_UNKNOWN
877# undef PNG_NO_HANDLE_AS_UNKNOWN
878# endif
879#endif
880#ifndef PNG_NO_HANDLE_AS_UNKNOWN
881# ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
882# define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
883# endif
884#endif
885
886#ifdef PNG_WRITE_SUPPORTED
887#ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
888
889#ifdef PNG_NO_WRITE_TEXT
890# define PNG_NO_WRITE_iTXt
891# define PNG_NO_WRITE_tEXt
892# define PNG_NO_WRITE_zTXt
893#endif
894#ifndef PNG_NO_WRITE_bKGD
895# define PNG_WRITE_bKGD_SUPPORTED
896# ifndef PNG_bKGD_SUPPORTED
897# define PNG_bKGD_SUPPORTED
898# endif
899#endif
900#ifndef PNG_NO_WRITE_cHRM
901# define PNG_WRITE_cHRM_SUPPORTED
902# ifndef PNG_cHRM_SUPPORTED
903# define PNG_cHRM_SUPPORTED
904# endif
905#endif
906#ifndef PNG_NO_WRITE_gAMA
907# define PNG_WRITE_gAMA_SUPPORTED
908# ifndef PNG_gAMA_SUPPORTED
909# define PNG_gAMA_SUPPORTED
910# endif
911#endif
912#ifndef PNG_NO_WRITE_hIST
913# define PNG_WRITE_hIST_SUPPORTED
914# ifndef PNG_hIST_SUPPORTED
915# define PNG_hIST_SUPPORTED
916# endif
917#endif
918#ifndef PNG_NO_WRITE_iCCP
919# define PNG_WRITE_iCCP_SUPPORTED
920# ifndef PNG_iCCP_SUPPORTED
921# define PNG_iCCP_SUPPORTED
922# endif
923#endif
924#ifndef PNG_NO_WRITE_iTXt
925# ifndef PNG_WRITE_iTXt_SUPPORTED
926# define PNG_WRITE_iTXt_SUPPORTED
927# endif
928# ifndef PNG_iTXt_SUPPORTED
929# define PNG_iTXt_SUPPORTED
930# endif
931#endif
932#ifndef PNG_NO_WRITE_oFFs
933# define PNG_WRITE_oFFs_SUPPORTED
934# ifndef PNG_oFFs_SUPPORTED
935# define PNG_oFFs_SUPPORTED
936# endif
937#endif
938#ifndef PNG_NO_WRITE_pCAL
939# define PNG_WRITE_pCAL_SUPPORTED
940# ifndef PNG_pCAL_SUPPORTED
941# define PNG_pCAL_SUPPORTED
942# endif
943#endif
944#ifndef PNG_NO_WRITE_sCAL
945# define PNG_WRITE_sCAL_SUPPORTED
946# ifndef PNG_sCAL_SUPPORTED
947# define PNG_sCAL_SUPPORTED
948# endif
949#endif
950#ifndef PNG_NO_WRITE_pHYs
951# define PNG_WRITE_pHYs_SUPPORTED
952# ifndef PNG_pHYs_SUPPORTED
953# define PNG_pHYs_SUPPORTED
954# endif
955#endif
956#ifndef PNG_NO_WRITE_sBIT
957# define PNG_WRITE_sBIT_SUPPORTED
958# ifndef PNG_sBIT_SUPPORTED
959# define PNG_sBIT_SUPPORTED
960# endif
961#endif
962#ifndef PNG_NO_WRITE_sPLT
963# define PNG_WRITE_sPLT_SUPPORTED
964# ifndef PNG_sPLT_SUPPORTED
965# define PNG_sPLT_SUPPORTED
966# endif
967#endif
968#ifndef PNG_NO_WRITE_sRGB
969# define PNG_WRITE_sRGB_SUPPORTED
970# ifndef PNG_sRGB_SUPPORTED
971# define PNG_sRGB_SUPPORTED
972# endif
973#endif
974#ifndef PNG_NO_WRITE_tEXt
975# define PNG_WRITE_tEXt_SUPPORTED
976# ifndef PNG_tEXt_SUPPORTED
977# define PNG_tEXt_SUPPORTED
978# endif
979#endif
980#ifndef PNG_NO_WRITE_tIME
981# define PNG_WRITE_tIME_SUPPORTED
982# ifndef PNG_tIME_SUPPORTED
983# define PNG_tIME_SUPPORTED
984# endif
985#endif
986#ifndef PNG_NO_WRITE_tRNS
987# define PNG_WRITE_tRNS_SUPPORTED
988# ifndef PNG_tRNS_SUPPORTED
989# define PNG_tRNS_SUPPORTED
990# endif
991#endif
992#ifndef PNG_NO_WRITE_zTXt
993# define PNG_WRITE_zTXt_SUPPORTED
994# ifndef PNG_zTXt_SUPPORTED
995# define PNG_zTXt_SUPPORTED
996# endif
997#endif
998#if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
999 defined(PNG_WRITE_zTXt_SUPPORTED)
1000# define PNG_WRITE_TEXT_SUPPORTED
1001# ifndef PNG_TEXT_SUPPORTED
1002# define PNG_TEXT_SUPPORTED
1003# endif
1004#endif
1005
1006#ifdef PNG_WRITE_tIME_SUPPORTED
1007# ifndef PNG_NO_CONVERT_tIME
1008# ifndef _WIN32_WCE
1009/* The "tm" structure is not supported on WindowsCE */
1010# ifndef PNG_CONVERT_tIME_SUPPORTED
1011# define PNG_CONVERT_tIME_SUPPORTED
1012# endif
1013# endif
1014# endif
1015#endif
1016
1017#endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */
1018
1019#if !defined(PNG_NO_WRITE_FILTER) && !defined(PNG_WRITE_FILTER_SUPPORTED)
1020# define PNG_WRITE_FILTER_SUPPORTED
1021#endif
1022
1023#ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS
1024# define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1025# ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
1026# define PNG_UNKNOWN_CHUNKS_SUPPORTED
1027# endif
1028#endif
1029#ifndef PNG_NO_HANDLE_AS_UNKNOWN
1030# ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1031# define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1032# endif
1033#endif
1034#endif /* PNG_WRITE_SUPPORTED */
1035
1036/* Turn this off to disable png_read_png() and
1037 * png_write_png() and leave the row_pointers member
1038 * out of the info structure.
1039 */
1040#ifndef PNG_NO_INFO_IMAGE
1041# define PNG_INFO_IMAGE_SUPPORTED
1042#endif
1043
1044/* Need the time information for converting tIME chunks */
1045#ifdef PNG_CONVERT_tIME_SUPPORTED
1046 /* "time.h" functions are not supported on WindowsCE */
1047# include <time.h>
1048#endif
1049
1050/* Some typedefs to get us started. These should be safe on most of the
1051 * common platforms. The typedefs should be at least as large as the
1052 * numbers suggest (a png_uint_32 must be at least 32 bits long), but they
1053 * don't have to be exactly that size. Some compilers dislike passing
1054 * unsigned shorts as function parameters, so you may be better off using
1055 * unsigned int for png_uint_16.
1056 */
1057
1058#if defined(INT_MAX) && (INT_MAX > 0x7ffffffeL)
1059typedef unsigned int png_uint_32;
1060typedef int png_int_32;
1061#else
1062typedef unsigned long png_uint_32;
1063typedef long png_int_32;
1064#endif
1065typedef unsigned short png_uint_16;
1066typedef short png_int_16;
1067typedef unsigned char png_byte;
1068
1069#ifdef PNG_NO_SIZE_T
1070 typedef unsigned int png_size_t;
1071#else
1072 typedef size_t png_size_t;
1073#endif
1074#define png_sizeof(x) sizeof(x)
1075
1076/* The following is needed for medium model support. It cannot be in the
1077 * pngpriv.h header. Needs modification for other compilers besides
1078 * MSC. Model independent support declares all arrays and pointers to be
1079 * large using the far keyword. The zlib version used must also support
1080 * model independent data. As of version zlib 1.0.4, the necessary changes
1081 * have been made in zlib. The USE_FAR_KEYWORD define triggers other
1082 * changes that are needed. (Tim Wegner)
1083 */
1084
1085/* Separate compiler dependencies (problem here is that zlib.h always
1086 * defines FAR. (SJT)
1087 */
1088#ifdef __BORLANDC__
1089# if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)
1090# define LDATA 1
1091# else
1092# define LDATA 0
1093# endif
1094 /* GRR: why is Cygwin in here? Cygwin is not Borland C... */
1095# if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)
1096# define PNG_MAX_MALLOC_64K
1097# if (LDATA != 1)
1098# ifndef FAR
1099# define FAR __far
1100# endif
1101# define USE_FAR_KEYWORD
1102# endif /* LDATA != 1 */
1103 /* Possibly useful for moving data out of default segment.
1104 * Uncomment it if you want. Could also define FARDATA as
1105 * const if your compiler supports it. (SJT)
1106# define FARDATA FAR
1107 */
1108# endif /* __WIN32__, __FLAT__, __CYGWIN__ */
1109#endif /* __BORLANDC__ */
1110
1111
1112/* Suggest testing for specific compiler first before testing for
1113 * FAR. The Watcom compiler defines both __MEDIUM__ and M_I86MM,
1114 * making reliance oncertain keywords suspect. (SJT)
1115 */
1116
1117/* MSC Medium model */
1118#ifdef FAR
1119# ifdef M_I86MM
1120# define USE_FAR_KEYWORD
1121# define FARDATA FAR
1122# include <dos.h>
1123# endif
1124#endif
1125
1126/* SJT: default case */
1127#ifndef FAR
1128# define FAR
1129#endif
1130
1131/* At this point FAR is always defined */
1132#ifndef FARDATA
1133# define FARDATA
1134#endif
1135
1136/* Typedef for floating-point numbers that are converted
1137 to fixed-point with a multiple of 100,000, e.g., int_gamma */
1138typedef png_int_32 png_fixed_point;
1139
1140/* Add typedefs for pointers */
1141typedef void FAR * png_voidp;
1142typedef png_byte FAR * png_bytep;
1143typedef png_uint_32 FAR * png_uint_32p;
1144typedef png_int_32 FAR * png_int_32p;
1145typedef png_uint_16 FAR * png_uint_16p;
1146typedef png_int_16 FAR * png_int_16p;
1147typedef PNG_CONST char FAR * png_const_charp;
1148typedef char FAR * png_charp;
1149typedef png_fixed_point FAR * png_fixed_point_p;
1150
1151#ifndef PNG_NO_STDIO
1152typedef FILE * png_FILE_p;
1153#endif
1154
1155#ifdef PNG_FLOATING_POINT_SUPPORTED
1156typedef double FAR * png_doublep;
1157#endif
1158
1159/* Pointers to pointers; i.e. arrays */
1160typedef png_byte FAR * FAR * png_bytepp;
1161typedef png_uint_32 FAR * FAR * png_uint_32pp;
1162typedef png_int_32 FAR * FAR * png_int_32pp;
1163typedef png_uint_16 FAR * FAR * png_uint_16pp;
1164typedef png_int_16 FAR * FAR * png_int_16pp;
1165typedef PNG_CONST char FAR * FAR * png_const_charpp;
1166typedef char FAR * FAR * png_charpp;
1167typedef png_fixed_point FAR * FAR * png_fixed_point_pp;
1168#ifdef PNG_FLOATING_POINT_SUPPORTED
1169typedef double FAR * FAR * png_doublepp;
1170#endif
1171
1172/* Pointers to pointers to pointers; i.e., pointer to array */
1173typedef char FAR * FAR * FAR * png_charppp;
1174
1175/* Define PNG_BUILD_DLL if the module being built is a Windows
1176 * LIBPNG DLL.
1177 *
1178 * Define PNG_USE_DLL if you want to *link* to the Windows LIBPNG DLL.
1179 * It is equivalent to Microsoft predefined macro _DLL that is
1180 * automatically defined when you compile using the share
1181 * version of the CRT (C Run-Time library)
1182 *
1183 * The cygwin mods make this behavior a little different:
1184 * Define PNG_BUILD_DLL if you are building a dll for use with cygwin
1185 * Define PNG_STATIC if you are building a static library for use with cygwin,
1186 * -or- if you are building an application that you want to link to the
1187 * static library.
1188 * PNG_USE_DLL is defined by default (no user action needed) unless one of
1189 * the other flags is defined.
1190 */
1191
1192#if !defined(PNG_DLL) && (defined(PNG_BUILD_DLL) || defined(PNG_USE_DLL))
1193# define PNG_DLL
1194#endif
1195
1196#ifdef __CYGWIN__
1197# undef PNGAPI
1198# define PNGAPI __cdecl
1199# undef PNG_IMPEXP
1200# define PNG_IMPEXP
1201#endif
1202
1203#define PNG_USE_LOCAL_ARRAYS /* Not used in libpng, defined for legacy apps */
1204
1205/* If you define PNGAPI, e.g., with compiler option "-DPNGAPI=__stdcall",
1206 * you may get warnings regarding the linkage of png_zalloc and png_zfree.
1207 * Don't ignore those warnings; you must also reset the default calling
1208 * convention in your compiler to match your PNGAPI, and you must build
1209 * zlib and your applications the same way you build libpng.
1210 */
1211
1212#if defined(__MINGW32__) && !defined(PNG_MODULEDEF)
1213# ifndef PNG_NO_MODULEDEF
1214# define PNG_NO_MODULEDEF
1215# endif
1216#endif
1217
1218#if !defined(PNG_IMPEXP) && defined(PNG_BUILD_DLL) && !defined(PNG_NO_MODULEDEF)
1219# define PNG_IMPEXP
1220#endif
1221
1222#if defined(PNG_DLL) || defined(_DLL) || defined(__DLL__ ) || \
1223 (( defined(_Windows) || defined(_WINDOWS) || \
1224 defined(WIN32) || defined(_WIN32) || defined(__WIN32__) ))
1225
1226# ifndef PNGAPI
1227# if (defined(__GNUC__) && defined(__arm__)) || defined (__ARMCC__)
1228# define PNGAPI
1229# elif defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800)) || defined(__WINSCW__)
1230# define PNGAPI __cdecl
1231# else
1232# define PNGAPI _cdecl
1233# endif
1234# endif
1235
1236# if !defined(PNG_IMPEXP) && (!defined(PNG_DLL) || \
1237 0 /* WINCOMPILER_WITH_NO_SUPPORT_FOR_DECLIMPEXP */)
1238# define PNG_IMPEXP
1239# endif
1240
1241# ifndef PNG_IMPEXP
1242
1243# define PNG_EXPORT_TYPE1(type,symbol) PNG_IMPEXP type PNGAPI symbol
1244# define PNG_EXPORT_TYPE2(type,symbol) type PNG_IMPEXP PNGAPI symbol
1245
1246 /* Borland/Microsoft */
1247# if defined(_MSC_VER) || defined(__BORLANDC__)
1248# if (_MSC_VER >= 800) || (__BORLANDC__ >= 0x500)
1249# define PNG_EXPORT PNG_EXPORT_TYPE1
1250# else
1251# define PNG_EXPORT PNG_EXPORT_TYPE2
1252# ifdef PNG_BUILD_DLL
1253# define PNG_IMPEXP __export
1254# else
1255# define PNG_IMPEXP /*__import */ /* doesn't exist AFAIK in VC++ */
1256# endif /* Exists in Borland C++ for
1257 C++ classes (== huge) */
1258# endif
1259# endif
1260
1261# ifndef PNG_IMPEXP
1262# ifdef PNG_BUILD_DLL
1263# define PNG_IMPEXP __declspec(dllexport)
1264# else
1265# define PNG_IMPEXP __declspec(dllimport)
1266# endif
1267# endif
1268# endif /* PNG_IMPEXP */
1269#else /* !(DLL || non-cygwin WINDOWS) */
1270# if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
1271# ifndef PNGAPI
1272# define PNGAPI _System
1273# endif
1274# else
1275# if 0 /* ... other platforms, with other meanings */
1276# endif
1277# endif
1278
1279# if !defined(PNG_IMPEXP)
1280# include <qconfig.h>
1281# if defined(QT_VISIBILITY_AVAILABLE)
1282# define PNG_IMPEXP __attribute__((visibility("default")))
1283# endif
1284# endif
1285
1286#endif
1287
1288#ifndef PNGAPI
1289# define PNGAPI
1290#endif
1291#ifndef PNG_IMPEXP
1292# define PNG_IMPEXP
1293#endif
1294
1295#ifdef PNG_BUILDSYMS
1296# ifndef PNG_EXPORT
1297# define PNG_EXPORT(type,symbol) PNG_FUNCTION_EXPORT symbol END
1298# endif
1299#endif
1300
1301#ifndef PNG_EXPORT
1302# define PNG_EXPORT(type,symbol) PNG_IMPEXP type PNGAPI symbol
1303#endif
1304
1305/* Support for compiler specific function attributes. These are used
1306 * so that where compiler support is available incorrect use of API
1307 * functions in png.h will generate compiler warnings.
1308 *
1309 * Added at libpng-1.2.41.
1310 */
1311
1312#ifndef PNG_NO_PEDANTIC_WARNINGS
1313# ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED
1314# define PNG_PEDANTIC_WARNINGS_SUPPORTED
1315# endif
1316#endif
1317
1318#ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED
1319/* Support for compiler specific function attributes. These are used
1320 * so that where compiler support is available incorrect use of API
1321 * functions in png.h will generate compiler warnings. Added at libpng
1322 * version 1.2.41.
1323 */
1324# ifdef __GNUC__
1325# ifndef PNG_USE_RESULT
1326# define PNG_USE_RESULT __attribute__((__warn_unused_result__))
1327# endif
1328# ifndef PNG_NORETURN
1329# define PNG_NORETURN __attribute__((__noreturn__))
1330# endif
1331# ifndef PNG_ALLOCATED
1332# define PNG_ALLOCATED __attribute__((__malloc__))
1333# endif
1334
1335 /* This specifically protects structure members that should only be
1336 * accessed from within the library, therefore should be empty during
1337 * a library build.
1338 */
1339# ifndef PNG_DEPRECATED
1340# define PNG_DEPRECATED __attribute__((__deprecated__))
1341# endif
1342# ifndef PNG_DEPSTRUCT
1343# define PNG_DEPSTRUCT __attribute__((__deprecated__))
1344# endif
1345# ifndef PNG_PRIVATE
1346# if 0 /* Doesn't work so we use deprecated instead*/
1347# define PNG_PRIVATE \
1348 __attribute__((warning("This function is not exported by libpng.")))
1349# else
1350# define PNG_PRIVATE \
1351 __attribute__((__deprecated__))
1352# endif
1353# endif /* PNG_PRIVATE */
1354# endif /* __GNUC__ */
1355#endif /* PNG_PEDANTIC_WARNINGS */
1356
1357#ifndef PNG_DEPRECATED
1358# define PNG_DEPRECATED /* Use of this function is deprecated */
1359#endif
1360#ifndef PNG_USE_RESULT
1361# define PNG_USE_RESULT /* The result of this function must be checked */
1362#endif
1363#ifndef PNG_NORETURN
1364# define PNG_NORETURN /* This function does not return */
1365#endif
1366#ifndef PNG_ALLOCATED
1367# define PNG_ALLOCATED /* The result of the function is new memory */
1368#endif
1369#ifndef PNG_DEPSTRUCT
1370# define PNG_DEPSTRUCT /* Access to this struct member is deprecated */
1371#endif
1372#ifndef PNG_PRIVATE
1373# define PNG_PRIVATE /* This is a private libpng function */
1374#endif
1375
1376/* Users may want to use these so they are not private. Any library
1377 * functions that are passed far data must be model-independent.
1378 */
1379
1380/* memory model/platform independent fns */
1381#ifndef PNG_ABORT
1382# if defined(_WINDOWS_) || defined(_WIN32_WCE)
1383# define PNG_ABORT() ExitProcess(0)
1384# else
1385# define PNG_ABORT() abort()
1386# endif
1387#endif
1388
1389#ifdef USE_FAR_KEYWORD
1390/* Use this to make far-to-near assignments */
1391# define CHECK 1
1392# define NOCHECK 0
1393# define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK))
1394# define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK))
1395# define png_strcpy _fstrcpy
1396# define png_strncpy _fstrncpy /* Added to v 1.2.6 */
1397# define png_strlen _fstrlen
1398# define png_memcmp _fmemcmp /* SJT: added */
1399# define png_memcpy _fmemcpy
1400# define png_memset _fmemset
1401# define png_sprintf sprintf
1402#else
1403# ifdef _WINDOWS_ /* Favor Windows over C runtime fns */
1404# define CVT_PTR(ptr) (ptr)
1405# define CVT_PTR_NOCHECK(ptr) (ptr)
1406# define png_strcpy lstrcpyA
1407# define png_strncpy lstrcpynA
1408# define png_strlen lstrlenA
1409# define png_memcmp memcmp
1410# define png_memcpy CopyMemory
1411# define png_memset memset
1412# define png_sprintf wsprintfA
1413# else
1414# define CVT_PTR(ptr) (ptr)
1415# define CVT_PTR_NOCHECK(ptr) (ptr)
1416# define png_strcpy strcpy
1417# define png_strncpy strncpy /* Added to v 1.2.6 */
1418# define png_strlen strlen
1419# define png_memcmp memcmp /* SJT: added */
1420# define png_memcpy memcpy
1421# define png_memset memset
1422# define png_sprintf sprintf
1423# ifndef PNG_NO_SNPRINTF
1424# ifdef _MSC_VER
1425# define png_snprintf _snprintf /* Added to v 1.2.19 */
1426# define png_snprintf2 _snprintf
1427# define png_snprintf6 _snprintf
1428# else
1429# define png_snprintf snprintf /* Added to v 1.2.19 */
1430# define png_snprintf2 snprintf
1431# define png_snprintf6 snprintf
1432# endif
1433# else
1434 /* You don't have or don't want to use snprintf(). Caution: Using
1435 * sprintf instead of snprintf exposes your application to accidental
1436 * or malevolent buffer overflows. If you don't have snprintf()
1437 * as a general rule you should provide one (you can get one from
1438 * Portable OpenSSH).
1439 */
1440# define png_snprintf(s1,n,fmt,x1) sprintf(s1,fmt,x1)
1441# define png_snprintf2(s1,n,fmt,x1,x2) sprintf(s1,fmt,x1,x2)
1442# define png_snprintf6(s1,n,fmt,x1,x2,x3,x4,x5,x6) \
1443 sprintf(s1,fmt,x1,x2,x3,x4,x5,x6)
1444# endif
1445# endif
1446#endif
1447
1448/* png_alloc_size_t is guaranteed to be no smaller than png_size_t,
1449 * and no smaller than png_uint_32. Casts from png_size_t or png_uint_32
1450 * to png_alloc_size_t are not necessary; in fact, it is recommended
1451 * not to use them at all so that the compiler can complain when something
1452 * turns out to be problematic.
1453 * Casts in the other direction (from png_alloc_size_t to png_size_t or
1454 * png_uint_32) should be explicitly applied; however, we do not expect
1455 * to encounter practical situations that require such conversions.
1456 */
1457#if defined(__TURBOC__) && !defined(__FLAT__)
1458# define png_mem_alloc farmalloc
1459# define png_mem_free farfree
1460 typedef unsigned long png_alloc_size_t;
1461#else
1462# if defined(_MSC_VER) && defined(MAXSEG_64K)
1463# define png_mem_alloc(s) halloc(s, 1)
1464# define png_mem_free hfree
1465 typedef unsigned long png_alloc_size_t;
1466# else
1467# if defined(_WINDOWS_) && (!defined(INT_MAX) || INT_MAX <= 0x7ffffffeL)
1468# define png_mem_alloc(s) HeapAlloc(GetProcessHeap(), 0, s)
1469# define png_mem_free(p) HeapFree(GetProcessHeap(), 0, p)
1470 typedef DWORD png_alloc_size_t;
1471# else
1472# define png_mem_alloc malloc
1473# define png_mem_free free
1474 typedef png_size_t png_alloc_size_t;
1475# endif
1476# endif
1477#endif
1478/* End of memory model/platform independent support */
1479
1480/* Just a little check that someone hasn't tried to define something
1481 * contradictory.
1482 */
1483#if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K)
1484# undef PNG_ZBUF_SIZE
1485# define PNG_ZBUF_SIZE 65536L
1486#endif
1487
1488
1489/* Added at libpng-1.2.8 */
1490#endif /* PNG_VERSION_INFO_ONLY */
1491
1492#endif /* PNGCONF_H */
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