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source: vbox/trunk/src/libs/libpng-1.2.8/pngconf.h@ 34034

Last change on this file since 34034 was 6393, checked in by vboxsync, 17 years ago

export libpng and zlib so Windows and OS/2 builds cleanly.
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1
2/* pngconf.h - machine configurable file for libpng
3 *
4 * libpng version 1.2.8 - December 3, 2004
5 * For conditions of distribution and use, see copyright notice in png.h
6 * Copyright (c) 1998-2004 Glenn Randers-Pehrson
7 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
8 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
9 */
10
11/* Any machine specific code is near the front of this file, so if you
12 * are configuring libpng for a machine, you may want to read the section
13 * starting here down to where it starts to typedef png_color, png_text,
14 * and png_info.
15 */
16
17#ifndef PNGCONF_H
18#define PNGCONF_H
19
20#define PNG_1_2_X
21
22/*
23 * PNG_USER_CONFIG has to be defined on the compiler command line. This
24 * includes the resource compiler for Windows DLL configurations.
25 */
26#ifdef PNG_USER_CONFIG
27#include "pngusr.h"
28#endif
29
30/*
31 * Added at libpng-1.2.8
32 *
33 * If you create a private DLL you need to define in "pngusr.h" the followings:
34 * #define PNG_USER_PRIVATEBUILD <Describes by whom and why this version of
35 * the DLL was built>
36 * e.g. #define PNG_USER_PRIVATEBUILD "Build by MyCompany for xyz reasons."
37 * #define PNG_USER_DLLFNAME_POSTFIX <two-letter postfix that serve to
38 * distinguish your DLL from those of the official release. These
39 * correspond to the trailing letters that come after the version
40 * number and must match your private DLL name>
41 * e.g. // private DLL "libpng13gx.dll"
42 * #define PNG_USER_DLLFNAME_POSTFIX "gx"
43 *
44 * The following macros are also at your disposal if you want to complete the
45 * DLL VERSIONINFO structure.
46 * - PNG_USER_VERSIONINFO_COMMENTS
47 * - PNG_USER_VERSIONINFO_COMPANYNAME
48 * - PNG_USER_VERSIONINFO_LEGALTRADEMARKS
49 */
50
51#ifdef __STDC__
52#ifdef SPECIALBUILD
53# pragma message("PNG_LIBPNG_SPECIALBUILD (and deprecated SPECIALBUILD)\
54 are now LIBPNG reserved macros. Use PNG_USER_PRIVATEBUILD instead.")
55#endif
56
57#ifdef PRIVATEBUILD
58# pragma message("PRIVATEBUILD is deprecated. Use\
59 PNG_USER_PRIVATEBUILD instead.")
60# define PNG_USER_PRIVATEBUILD PRIVATEBUILD
61#endif
62#endif /* __STDC__ */
63
64#ifndef PNG_VERSION_INFO_ONLY
65
66/* End of material added to libpng-1.2.8 */
67
68/* This is the size of the compression buffer, and thus the size of
69 * an IDAT chunk. Make this whatever size you feel is best for your
70 * machine. One of these will be allocated per png_struct. When this
71 * is full, it writes the data to the disk, and does some other
72 * calculations. Making this an extremely small size will slow
73 * the library down, but you may want to experiment to determine
74 * where it becomes significant, if you are concerned with memory
75 * usage. Note that zlib allocates at least 32Kb also. For readers,
76 * this describes the size of the buffer available to read the data in.
77 * Unless this gets smaller than the size of a row (compressed),
78 * it should not make much difference how big this is.
79 */
80
81#ifndef PNG_ZBUF_SIZE
82# define PNG_ZBUF_SIZE 8192
83#endif
84
85/* Enable if you want a write-only libpng */
86
87#ifndef PNG_NO_READ_SUPPORTED
88# define PNG_READ_SUPPORTED
89#endif
90
91/* Enable if you want a read-only libpng */
92
93#ifndef PNG_NO_WRITE_SUPPORTED
94# define PNG_WRITE_SUPPORTED
95#endif
96
97/* Enabled by default in 1.2.0. You can disable this if you don't need to
98 support PNGs that are embedded in MNG datastreams */
99#if !defined(PNG_1_0_X) && !defined(PNG_NO_MNG_FEATURES)
100# ifndef PNG_MNG_FEATURES_SUPPORTED
101# define PNG_MNG_FEATURES_SUPPORTED
102# endif
103#endif
104
105#ifndef PNG_NO_FLOATING_POINT_SUPPORTED
106# ifndef PNG_FLOATING_POINT_SUPPORTED
107# define PNG_FLOATING_POINT_SUPPORTED
108# endif
109#endif
110
111/* If you are running on a machine where you cannot allocate more
112 * than 64K of memory at once, uncomment this. While libpng will not
113 * normally need that much memory in a chunk (unless you load up a very
114 * large file), zlib needs to know how big of a chunk it can use, and
115 * libpng thus makes sure to check any memory allocation to verify it
116 * will fit into memory.
117#define PNG_MAX_MALLOC_64K
118 */
119#if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
120# define PNG_MAX_MALLOC_64K
121#endif
122
123/* Special munging to support doing things the 'cygwin' way:
124 * 'Normal' png-on-win32 defines/defaults:
125 * PNG_BUILD_DLL -- building dll
126 * PNG_USE_DLL -- building an application, linking to dll
127 * (no define) -- building static library, or building an
128 * application and linking to the static lib
129 * 'Cygwin' defines/defaults:
130 * PNG_BUILD_DLL -- (ignored) building the dll
131 * (no define) -- (ignored) building an application, linking to the dll
132 * PNG_STATIC -- (ignored) building the static lib, or building an
133 * application that links to the static lib.
134 * ALL_STATIC -- (ignored) building various static libs, or building an
135 * application that links to the static libs.
136 * Thus,
137 * a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and
138 * this bit of #ifdefs will define the 'correct' config variables based on
139 * that. If a cygwin user *wants* to define 'PNG_USE_DLL' that's okay, but
140 * unnecessary.
141 *
142 * Also, the precedence order is:
143 * ALL_STATIC (since we can't #undef something outside our namespace)
144 * PNG_BUILD_DLL
145 * PNG_STATIC
146 * (nothing) == PNG_USE_DLL
147 *
148 * CYGWIN (2002-01-20): The preceding is now obsolete. With the advent
149 * of auto-import in binutils, we no longer need to worry about
150 * __declspec(dllexport) / __declspec(dllimport) and friends. Therefore,
151 * we don't need to worry about PNG_STATIC or ALL_STATIC when it comes
152 * to __declspec() stuff. However, we DO need to worry about
153 * PNG_BUILD_DLL and PNG_STATIC because those change some defaults
154 * such as CONSOLE_IO and whether GLOBAL_ARRAYS are allowed.
155 */
156#if defined(__CYGWIN__)
157# if defined(ALL_STATIC)
158# if defined(PNG_BUILD_DLL)
159# undef PNG_BUILD_DLL
160# endif
161# if defined(PNG_USE_DLL)
162# undef PNG_USE_DLL
163# endif
164# if defined(PNG_DLL)
165# undef PNG_DLL
166# endif
167# if !defined(PNG_STATIC)
168# define PNG_STATIC
169# endif
170# else
171# if defined (PNG_BUILD_DLL)
172# if defined(PNG_STATIC)
173# undef PNG_STATIC
174# endif
175# if defined(PNG_USE_DLL)
176# undef PNG_USE_DLL
177# endif
178# if !defined(PNG_DLL)
179# define PNG_DLL
180# endif
181# else
182# if defined(PNG_STATIC)
183# if defined(PNG_USE_DLL)
184# undef PNG_USE_DLL
185# endif
186# if defined(PNG_DLL)
187# undef PNG_DLL
188# endif
189# else
190# if !defined(PNG_USE_DLL)
191# define PNG_USE_DLL
192# endif
193# if !defined(PNG_DLL)
194# define PNG_DLL
195# endif
196# endif
197# endif
198# endif
199#endif
200
201/* This protects us against compilers that run on a windowing system
202 * and thus don't have or would rather us not use the stdio types:
203 * stdin, stdout, and stderr. The only one currently used is stderr
204 * in png_error() and png_warning(). #defining PNG_NO_CONSOLE_IO will
205 * prevent these from being compiled and used. #defining PNG_NO_STDIO
206 * will also prevent these, plus will prevent the entire set of stdio
207 * macros and functions (FILE *, printf, etc.) from being compiled and used,
208 * unless (PNG_DEBUG > 0) has been #defined.
209 *
210 * #define PNG_NO_CONSOLE_IO
211 * #define PNG_NO_STDIO
212 */
213
214#if defined(_WIN32_WCE)
215# include <windows.h>
216 /* Console I/O functions are not supported on WindowsCE */
217# define PNG_NO_CONSOLE_IO
218# ifdef PNG_DEBUG
219# undef PNG_DEBUG
220# endif
221#endif
222
223#ifdef PNG_BUILD_DLL
224# ifndef PNG_CONSOLE_IO_SUPPORTED
225# ifndef PNG_NO_CONSOLE_IO
226# define PNG_NO_CONSOLE_IO
227# endif
228# endif
229#endif
230
231# ifdef PNG_NO_STDIO
232# ifndef PNG_NO_CONSOLE_IO
233# define PNG_NO_CONSOLE_IO
234# endif
235# ifdef PNG_DEBUG
236# if (PNG_DEBUG > 0)
237# include <stdio.h>
238# endif
239# endif
240# else
241# if !defined(_WIN32_WCE)
242/* "stdio.h" functions are not supported on WindowsCE */
243# include <stdio.h>
244# endif
245# endif
246
247/* This macro protects us against machines that don't have function
248 * prototypes (ie K&R style headers). If your compiler does not handle
249 * function prototypes, define this macro and use the included ansi2knr.
250 * I've always been able to use _NO_PROTO as the indicator, but you may
251 * need to drag the empty declaration out in front of here, or change the
252 * ifdef to suit your own needs.
253 */
254#ifndef PNGARG
255
256#ifdef OF /* zlib prototype munger */
257# define PNGARG(arglist) OF(arglist)
258#else
259
260#ifdef _NO_PROTO
261# define PNGARG(arglist) ()
262# ifndef PNG_TYPECAST_NULL
263# define PNG_TYPECAST_NULL
264# endif
265#else
266# define PNGARG(arglist) arglist
267#endif /* _NO_PROTO */
268
269#endif /* OF */
270
271#endif /* PNGARG */
272
273/* Try to determine if we are compiling on a Mac. Note that testing for
274 * just __MWERKS__ is not good enough, because the Codewarrior is now used
275 * on non-Mac platforms.
276 */
277#ifndef MACOS
278# if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
279 defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC)
280# define MACOS
281# endif
282#endif
283
284/* enough people need this for various reasons to include it here */
285#if !defined(MACOS) && !defined(RISCOS) && !defined(_WIN32_WCE)
286# include <sys/types.h>
287#endif
288
289#if !defined(PNG_SETJMP_NOT_SUPPORTED) && !defined(PNG_NO_SETJMP_SUPPORTED)
290# define PNG_SETJMP_SUPPORTED
291#endif
292
293#ifdef PNG_SETJMP_SUPPORTED
294/* This is an attempt to force a single setjmp behaviour on Linux. If
295 * the X config stuff didn't define _BSD_SOURCE we wouldn't need this.
296 */
297
298# ifdef __linux__
299# ifdef _BSD_SOURCE
300# define PNG_SAVE_BSD_SOURCE
301# undef _BSD_SOURCE
302# endif
303# ifdef _SETJMP_H
304 /* If you encounter a compiler error here, see the explanation
305 * near the end of INSTALL.
306 */
307 __png.h__ already includes setjmp.h;
308 __dont__ include it again.;
309# endif
310# endif /* __linux__ */
311
312 /* include setjmp.h for error handling */
313# include <setjmp.h>
314
315# ifdef __linux__
316# ifdef PNG_SAVE_BSD_SOURCE
317# define _BSD_SOURCE
318# undef PNG_SAVE_BSD_SOURCE
319# endif
320# endif /* __linux__ */
321#endif /* PNG_SETJMP_SUPPORTED */
322
323#ifdef BSD
324# include <strings.h>
325#else
326# include <string.h>
327#endif
328
329/* Other defines for things like memory and the like can go here. */
330#ifdef PNG_INTERNAL
331
332#include <stdlib.h>
333
334/* The functions exported by PNG_EXTERN are PNG_INTERNAL functions, which
335 * aren't usually used outside the library (as far as I know), so it is
336 * debatable if they should be exported at all. In the future, when it is
337 * possible to have run-time registry of chunk-handling functions, some of
338 * these will be made available again.
339#define PNG_EXTERN extern
340 */
341#define PNG_EXTERN
342
343/* Other defines specific to compilers can go here. Try to keep
344 * them inside an appropriate ifdef/endif pair for portability.
345 */
346
347#if defined(PNG_FLOATING_POINT_SUPPORTED)
348# if defined(MACOS)
349 /* We need to check that <math.h> hasn't already been included earlier
350 * as it seems it doesn't agree with <fp.h>, yet we should really use
351 * <fp.h> if possible.
352 */
353# if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__)
354# include <fp.h>
355# endif
356# else
357# include <math.h>
358# endif
359# if defined(_AMIGA) && defined(__SASC) && defined(_M68881)
360 /* Amiga SAS/C: We must include builtin FPU functions when compiling using
361 * MATH=68881
362 */
363# include <m68881.h>
364# endif
365#endif
366
367/* Codewarrior on NT has linking problems without this. */
368#if (defined(__MWERKS__) && defined(WIN32)) || defined(__STDC__)
369# define PNG_ALWAYS_EXTERN
370#endif
371
372/* This provides the non-ANSI (far) memory allocation routines. */
373#if defined(__TURBOC__) && defined(__MSDOS__)
374# include <mem.h>
375# include <alloc.h>
376#endif
377
378/* I have no idea why is this necessary... */
379#if defined(_MSC_VER) && (defined(WIN32) || defined(_Windows) || \
380 defined(_WINDOWS) || defined(_WIN32) || defined(__WIN32__))
381# include <malloc.h>
382#endif
383
384/* This controls how fine the dithering gets. As this allocates
385 * a largish chunk of memory (32K), those who are not as concerned
386 * with dithering quality can decrease some or all of these.
387 */
388#ifndef PNG_DITHER_RED_BITS
389# define PNG_DITHER_RED_BITS 5
390#endif
391#ifndef PNG_DITHER_GREEN_BITS
392# define PNG_DITHER_GREEN_BITS 5
393#endif
394#ifndef PNG_DITHER_BLUE_BITS
395# define PNG_DITHER_BLUE_BITS 5
396#endif
397
398/* This controls how fine the gamma correction becomes when you
399 * are only interested in 8 bits anyway. Increasing this value
400 * results in more memory being used, and more pow() functions
401 * being called to fill in the gamma tables. Don't set this value
402 * less then 8, and even that may not work (I haven't tested it).
403 */
404
405#ifndef PNG_MAX_GAMMA_8
406# define PNG_MAX_GAMMA_8 11
407#endif
408
409/* This controls how much a difference in gamma we can tolerate before
410 * we actually start doing gamma conversion.
411 */
412#ifndef PNG_GAMMA_THRESHOLD
413# define PNG_GAMMA_THRESHOLD 0.05
414#endif
415
416#endif /* PNG_INTERNAL */
417
418/* The following uses const char * instead of char * for error
419 * and warning message functions, so some compilers won't complain.
420 * If you do not want to use const, define PNG_NO_CONST here.
421 */
422
423#ifndef PNG_NO_CONST
424# define PNG_CONST const
425#else
426# define PNG_CONST
427#endif
428
429/* The following defines give you the ability to remove code from the
430 * library that you will not be using. I wish I could figure out how to
431 * automate this, but I can't do that without making it seriously hard
432 * on the users. So if you are not using an ability, change the #define
433 * to and #undef, and that part of the library will not be compiled. If
434 * your linker can't find a function, you may want to make sure the
435 * ability is defined here. Some of these depend upon some others being
436 * defined. I haven't figured out all the interactions here, so you may
437 * have to experiment awhile to get everything to compile. If you are
438 * creating or using a shared library, you probably shouldn't touch this,
439 * as it will affect the size of the structures, and this will cause bad
440 * things to happen if the library and/or application ever change.
441 */
442
443/* Any features you will not be using can be undef'ed here */
444
445/* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user
446 * to turn it off with "*TRANSFORMS_NOT_SUPPORTED" or *PNG_NO_*_TRANSFORMS
447 * on the compile line, then pick and choose which ones to define without
448 * having to edit this file. It is safe to use the *TRANSFORMS_NOT_SUPPORTED
449 * if you only want to have a png-compliant reader/writer but don't need
450 * any of the extra transformations. This saves about 80 kbytes in a
451 * typical installation of the library. (PNG_NO_* form added in version
452 * 1.0.1c, for consistency)
453 */
454
455/* The size of the png_text structure changed in libpng-1.0.6 when
456 * iTXt is supported. It is turned off by default, to support old apps
457 * that malloc the png_text structure instead of calling png_set_text()
458 * and letting libpng malloc it. It will be turned on by default in
459 * libpng-1.3.0.
460 */
461
462#ifndef PNG_iTXt_SUPPORTED
463# if !defined(PNG_READ_iTXt_SUPPORTED) && !defined(PNG_NO_READ_iTXt)
464# define PNG_NO_READ_iTXt
465# endif
466# if !defined(PNG_WRITE_iTXt_SUPPORTED) && !defined(PNG_NO_WRITE_iTXt)
467# define PNG_NO_WRITE_iTXt
468# endif
469#endif
470
471/* The following support, added after version 1.0.0, can be turned off here en
472 * masse by defining PNG_LEGACY_SUPPORTED in case you need binary compatibility
473 * with old applications that require the length of png_struct and png_info
474 * to remain unchanged.
475 */
476
477#ifdef PNG_LEGACY_SUPPORTED
478# define PNG_NO_FREE_ME
479# define PNG_NO_READ_UNKNOWN_CHUNKS
480# define PNG_NO_WRITE_UNKNOWN_CHUNKS
481# define PNG_NO_READ_USER_CHUNKS
482# define PNG_NO_READ_iCCP
483# define PNG_NO_WRITE_iCCP
484# define PNG_NO_READ_iTXt
485# define PNG_NO_WRITE_iTXt
486# define PNG_NO_READ_sCAL
487# define PNG_NO_WRITE_sCAL
488# define PNG_NO_READ_sPLT
489# define PNG_NO_WRITE_sPLT
490# define PNG_NO_INFO_IMAGE
491# define PNG_NO_READ_RGB_TO_GRAY
492# define PNG_NO_READ_USER_TRANSFORM
493# define PNG_NO_WRITE_USER_TRANSFORM
494# define PNG_NO_USER_MEM
495# define PNG_NO_READ_EMPTY_PLTE
496# define PNG_NO_MNG_FEATURES
497# define PNG_NO_FIXED_POINT_SUPPORTED
498#endif
499
500/* Ignore attempt to turn off both floating and fixed point support */
501#if !defined(PNG_FLOATING_POINT_SUPPORTED) || \
502 !defined(PNG_NO_FIXED_POINT_SUPPORTED)
503# define PNG_FIXED_POINT_SUPPORTED
504#endif
505
506#ifndef PNG_NO_FREE_ME
507# define PNG_FREE_ME_SUPPORTED
508#endif
509
510#if defined(PNG_READ_SUPPORTED)
511
512#if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \
513 !defined(PNG_NO_READ_TRANSFORMS)
514# define PNG_READ_TRANSFORMS_SUPPORTED
515#endif
516
517#ifdef PNG_READ_TRANSFORMS_SUPPORTED
518# ifndef PNG_NO_READ_EXPAND
519# define PNG_READ_EXPAND_SUPPORTED
520# endif
521# ifndef PNG_NO_READ_SHIFT
522# define PNG_READ_SHIFT_SUPPORTED
523# endif
524# ifndef PNG_NO_READ_PACK
525# define PNG_READ_PACK_SUPPORTED
526# endif
527# ifndef PNG_NO_READ_BGR
528# define PNG_READ_BGR_SUPPORTED
529# endif
530# ifndef PNG_NO_READ_SWAP
531# define PNG_READ_SWAP_SUPPORTED
532# endif
533# ifndef PNG_NO_READ_PACKSWAP
534# define PNG_READ_PACKSWAP_SUPPORTED
535# endif
536# ifndef PNG_NO_READ_INVERT
537# define PNG_READ_INVERT_SUPPORTED
538# endif
539# ifndef PNG_NO_READ_DITHER
540# define PNG_READ_DITHER_SUPPORTED
541# endif
542# ifndef PNG_NO_READ_BACKGROUND
543# define PNG_READ_BACKGROUND_SUPPORTED
544# endif
545# ifndef PNG_NO_READ_16_TO_8
546# define PNG_READ_16_TO_8_SUPPORTED
547# endif
548# ifndef PNG_NO_READ_FILLER
549# define PNG_READ_FILLER_SUPPORTED
550# endif
551# ifndef PNG_NO_READ_GAMMA
552# define PNG_READ_GAMMA_SUPPORTED
553# endif
554# ifndef PNG_NO_READ_GRAY_TO_RGB
555# define PNG_READ_GRAY_TO_RGB_SUPPORTED
556# endif
557# ifndef PNG_NO_READ_SWAP_ALPHA
558# define PNG_READ_SWAP_ALPHA_SUPPORTED
559# endif
560# ifndef PNG_NO_READ_INVERT_ALPHA
561# define PNG_READ_INVERT_ALPHA_SUPPORTED
562# endif
563# ifndef PNG_NO_READ_STRIP_ALPHA
564# define PNG_READ_STRIP_ALPHA_SUPPORTED
565# endif
566# ifndef PNG_NO_READ_USER_TRANSFORM
567# define PNG_READ_USER_TRANSFORM_SUPPORTED
568# endif
569# ifndef PNG_NO_READ_RGB_TO_GRAY
570# define PNG_READ_RGB_TO_GRAY_SUPPORTED
571# endif
572#endif /* PNG_READ_TRANSFORMS_SUPPORTED */
573
574#if !defined(PNG_NO_PROGRESSIVE_READ) && \
575 !defined(PNG_PROGRESSIVE_READ_NOT_SUPPORTED) /* if you don't do progressive */
576# define PNG_PROGRESSIVE_READ_SUPPORTED /* reading. This is not talking */
577#endif /* about interlacing capability! You'll */
578 /* still have interlacing unless you change the following line: */
579
580#define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */
581
582#ifndef PNG_NO_READ_COMPOSITE_NODIV
583# ifndef PNG_NO_READ_COMPOSITED_NODIV /* libpng-1.0.x misspelling */
584# define PNG_READ_COMPOSITE_NODIV_SUPPORTED /* well tested on Intel, SGI */
585# endif
586#endif
587
588/* Deprecated, will be removed from version 2.0.0.
589 Use PNG_MNG_FEATURES_SUPPORTED instead. */
590#ifndef PNG_NO_READ_EMPTY_PLTE
591# define PNG_READ_EMPTY_PLTE_SUPPORTED
592#endif
593
594#endif /* PNG_READ_SUPPORTED */
595
596#if defined(PNG_WRITE_SUPPORTED)
597
598# if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \
599 !defined(PNG_NO_WRITE_TRANSFORMS)
600# define PNG_WRITE_TRANSFORMS_SUPPORTED
601#endif
602
603#ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
604# ifndef PNG_NO_WRITE_SHIFT
605# define PNG_WRITE_SHIFT_SUPPORTED
606# endif
607# ifndef PNG_NO_WRITE_PACK
608# define PNG_WRITE_PACK_SUPPORTED
609# endif
610# ifndef PNG_NO_WRITE_BGR
611# define PNG_WRITE_BGR_SUPPORTED
612# endif
613# ifndef PNG_NO_WRITE_SWAP
614# define PNG_WRITE_SWAP_SUPPORTED
615# endif
616# ifndef PNG_NO_WRITE_PACKSWAP
617# define PNG_WRITE_PACKSWAP_SUPPORTED
618# endif
619# ifndef PNG_NO_WRITE_INVERT
620# define PNG_WRITE_INVERT_SUPPORTED
621# endif
622# ifndef PNG_NO_WRITE_FILLER
623# define PNG_WRITE_FILLER_SUPPORTED /* same as WRITE_STRIP_ALPHA */
624# endif
625# ifndef PNG_NO_WRITE_SWAP_ALPHA
626# define PNG_WRITE_SWAP_ALPHA_SUPPORTED
627# endif
628# ifndef PNG_NO_WRITE_INVERT_ALPHA
629# define PNG_WRITE_INVERT_ALPHA_SUPPORTED
630# endif
631# ifndef PNG_NO_WRITE_USER_TRANSFORM
632# define PNG_WRITE_USER_TRANSFORM_SUPPORTED
633# endif
634#endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */
635
636#define PNG_WRITE_INTERLACING_SUPPORTED /* not required for PNG-compliant
637 encoders, but can cause trouble
638 if left undefined */
639
640#if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \
641 defined(PNG_FLOATING_POINT_SUPPORTED)
642# define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
643#endif
644
645#ifndef PNG_NO_WRITE_FLUSH
646# define PNG_WRITE_FLUSH_SUPPORTED
647#endif
648
649/* Deprecated, see PNG_MNG_FEATURES_SUPPORTED, above */
650#ifndef PNG_NO_WRITE_EMPTY_PLTE
651# define PNG_WRITE_EMPTY_PLTE_SUPPORTED
652#endif
653
654#endif /* PNG_WRITE_SUPPORTED */
655
656#ifndef PNG_1_0_X
657# ifndef PNG_NO_ERROR_NUMBERS
658# define PNG_ERROR_NUMBERS_SUPPORTED
659# endif
660#endif /* PNG_1_0_X */
661
662#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
663 defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
664# ifndef PNG_NO_USER_TRANSFORM_PTR
665# define PNG_USER_TRANSFORM_PTR_SUPPORTED
666# endif
667#endif
668
669#ifndef PNG_NO_STDIO
670# define PNG_TIME_RFC1123_SUPPORTED
671#endif
672
673/* This adds extra functions in pngget.c for accessing data from the
674 * info pointer (added in version 0.99)
675 * png_get_image_width()
676 * png_get_image_height()
677 * png_get_bit_depth()
678 * png_get_color_type()
679 * png_get_compression_type()
680 * png_get_filter_type()
681 * png_get_interlace_type()
682 * png_get_pixel_aspect_ratio()
683 * png_get_pixels_per_meter()
684 * png_get_x_offset_pixels()
685 * png_get_y_offset_pixels()
686 * png_get_x_offset_microns()
687 * png_get_y_offset_microns()
688 */
689#if !defined(PNG_NO_EASY_ACCESS) && !defined(PNG_EASY_ACCESS_SUPPORTED)
690# define PNG_EASY_ACCESS_SUPPORTED
691#endif
692
693/* PNG_ASSEMBLER_CODE was enabled by default in version 1.2.0
694 even when PNG_USE_PNGVCRD or PNG_USE_PNGGCCRD is not defined */
695#if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_ASSEMBLER_CODE)
696# ifndef PNG_ASSEMBLER_CODE_SUPPORTED
697# define PNG_ASSEMBLER_CODE_SUPPORTED
698# endif
699# if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
700# define PNG_MMX_CODE_SUPPORTED
701# endif
702#endif
703
704/* If you are sure that you don't need thread safety and you are compiling
705 with PNG_USE_PNGCCRD for an MMX application, you can define this for
706 faster execution. See pnggccrd.c.
707#define PNG_THREAD_UNSAFE_OK
708*/
709
710#if !defined(PNG_1_0_X)
711#if !defined(PNG_NO_USER_MEM) && !defined(PNG_USER_MEM_SUPPORTED)
712# define PNG_USER_MEM_SUPPORTED
713#endif
714#endif /* PNG_1_0_X */
715
716/* Added at libpng-1.2.6 */
717#if !defined(PNG_1_0_X)
718#ifndef PNG_SET_USER_LIMITS_SUPPORTED
719#if !defined(PNG_NO_SET_USER_LIMITS) && !defined(PNG_SET_USER_LIMITS_SUPPORTED)
720# define PNG_SET_USER_LIMITS_SUPPORTED
721#endif
722#endif
723#endif /* PNG_1_0_X */
724
725/* Added at libpng-1.0.16 and 1.2.6. To accept all valid PNGS no matter
726 * how large, set these limits to 0x7fffffffL
727 */
728#ifndef PNG_USER_WIDTH_MAX
729# define PNG_USER_WIDTH_MAX 1000000L
730#endif
731#ifndef PNG_USER_HEIGHT_MAX
732# define PNG_USER_HEIGHT_MAX 1000000L
733#endif
734
735/* These are currently experimental features, define them if you want */
736
737/* very little testing */
738/*
739#ifdef PNG_READ_SUPPORTED
740# ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
741# define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
742# endif
743#endif
744*/
745
746/* This is only for PowerPC big-endian and 680x0 systems */
747/* some testing */
748/*
749#ifndef PNG_READ_BIG_ENDIAN_SUPPORTED
750# define PNG_READ_BIG_ENDIAN_SUPPORTED
751#endif
752*/
753
754/* Buggy compilers (e.g., gcc 2.7.2.2) need this */
755/*
756#define PNG_NO_POINTER_INDEXING
757*/
758
759/* These functions are turned off by default, as they will be phased out. */
760/*
761#define PNG_USELESS_TESTS_SUPPORTED
762#define PNG_CORRECT_PALETTE_SUPPORTED
763*/
764
765/* Any chunks you are not interested in, you can undef here. The
766 * ones that allocate memory may be expecially important (hIST,
767 * tEXt, zTXt, tRNS, pCAL). Others will just save time and make png_info
768 * a bit smaller.
769 */
770
771#if defined(PNG_READ_SUPPORTED) && \
772 !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
773 !defined(PNG_NO_READ_ANCILLARY_CHUNKS)
774# define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
775#endif
776
777#if defined(PNG_WRITE_SUPPORTED) && \
778 !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
779 !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS)
780# define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
781#endif
782
783#ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
784
785#ifdef PNG_NO_READ_TEXT
786# define PNG_NO_READ_iTXt
787# define PNG_NO_READ_tEXt
788# define PNG_NO_READ_zTXt
789#endif
790#ifndef PNG_NO_READ_bKGD
791# define PNG_READ_bKGD_SUPPORTED
792# define PNG_bKGD_SUPPORTED
793#endif
794#ifndef PNG_NO_READ_cHRM
795# define PNG_READ_cHRM_SUPPORTED
796# define PNG_cHRM_SUPPORTED
797#endif
798#ifndef PNG_NO_READ_gAMA
799# define PNG_READ_gAMA_SUPPORTED
800# define PNG_gAMA_SUPPORTED
801#endif
802#ifndef PNG_NO_READ_hIST
803# define PNG_READ_hIST_SUPPORTED
804# define PNG_hIST_SUPPORTED
805#endif
806#ifndef PNG_NO_READ_iCCP
807# define PNG_READ_iCCP_SUPPORTED
808# define PNG_iCCP_SUPPORTED
809#endif
810#ifndef PNG_NO_READ_iTXt
811# ifndef PNG_READ_iTXt_SUPPORTED
812# define PNG_READ_iTXt_SUPPORTED
813# endif
814# ifndef PNG_iTXt_SUPPORTED
815# define PNG_iTXt_SUPPORTED
816# endif
817#endif
818#ifndef PNG_NO_READ_oFFs
819# define PNG_READ_oFFs_SUPPORTED
820# define PNG_oFFs_SUPPORTED
821#endif
822#ifndef PNG_NO_READ_pCAL
823# define PNG_READ_pCAL_SUPPORTED
824# define PNG_pCAL_SUPPORTED
825#endif
826#ifndef PNG_NO_READ_sCAL
827# define PNG_READ_sCAL_SUPPORTED
828# define PNG_sCAL_SUPPORTED
829#endif
830#ifndef PNG_NO_READ_pHYs
831# define PNG_READ_pHYs_SUPPORTED
832# define PNG_pHYs_SUPPORTED
833#endif
834#ifndef PNG_NO_READ_sBIT
835# define PNG_READ_sBIT_SUPPORTED
836# define PNG_sBIT_SUPPORTED
837#endif
838#ifndef PNG_NO_READ_sPLT
839# define PNG_READ_sPLT_SUPPORTED
840# define PNG_sPLT_SUPPORTED
841#endif
842#ifndef PNG_NO_READ_sRGB
843# define PNG_READ_sRGB_SUPPORTED
844# define PNG_sRGB_SUPPORTED
845#endif
846#ifndef PNG_NO_READ_tEXt
847# define PNG_READ_tEXt_SUPPORTED
848# define PNG_tEXt_SUPPORTED
849#endif
850#ifndef PNG_NO_READ_tIME
851# define PNG_READ_tIME_SUPPORTED
852# define PNG_tIME_SUPPORTED
853#endif
854#ifndef PNG_NO_READ_tRNS
855# define PNG_READ_tRNS_SUPPORTED
856# define PNG_tRNS_SUPPORTED
857#endif
858#ifndef PNG_NO_READ_zTXt
859# define PNG_READ_zTXt_SUPPORTED
860# define PNG_zTXt_SUPPORTED
861#endif
862#ifndef PNG_NO_READ_UNKNOWN_CHUNKS
863# define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
864# ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
865# define PNG_UNKNOWN_CHUNKS_SUPPORTED
866# endif
867# ifndef PNG_NO_HANDLE_AS_UNKNOWN
868# define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
869# endif
870#endif
871#if !defined(PNG_NO_READ_USER_CHUNKS) && \
872 defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
873# define PNG_READ_USER_CHUNKS_SUPPORTED
874# define PNG_USER_CHUNKS_SUPPORTED
875# ifdef PNG_NO_READ_UNKNOWN_CHUNKS
876# undef PNG_NO_READ_UNKNOWN_CHUNKS
877# endif
878# ifdef PNG_NO_HANDLE_AS_UNKNOWN
879# undef PNG_NO_HANDLE_AS_UNKNOWN
880# endif
881#endif
882#ifndef PNG_NO_READ_OPT_PLTE
883# define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */
884#endif /* optional PLTE chunk in RGB and RGBA images */
885#if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \
886 defined(PNG_READ_zTXt_SUPPORTED)
887# define PNG_READ_TEXT_SUPPORTED
888# define PNG_TEXT_SUPPORTED
889#endif
890
891#endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */
892
893#ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
894
895#ifdef PNG_NO_WRITE_TEXT
896# define PNG_NO_WRITE_iTXt
897# define PNG_NO_WRITE_tEXt
898# define PNG_NO_WRITE_zTXt
899#endif
900#ifndef PNG_NO_WRITE_bKGD
901# define PNG_WRITE_bKGD_SUPPORTED
902# ifndef PNG_bKGD_SUPPORTED
903# define PNG_bKGD_SUPPORTED
904# endif
905#endif
906#ifndef PNG_NO_WRITE_cHRM
907# define PNG_WRITE_cHRM_SUPPORTED
908# ifndef PNG_cHRM_SUPPORTED
909# define PNG_cHRM_SUPPORTED
910# endif
911#endif
912#ifndef PNG_NO_WRITE_gAMA
913# define PNG_WRITE_gAMA_SUPPORTED
914# ifndef PNG_gAMA_SUPPORTED
915# define PNG_gAMA_SUPPORTED
916# endif
917#endif
918#ifndef PNG_NO_WRITE_hIST
919# define PNG_WRITE_hIST_SUPPORTED
920# ifndef PNG_hIST_SUPPORTED
921# define PNG_hIST_SUPPORTED
922# endif
923#endif
924#ifndef PNG_NO_WRITE_iCCP
925# define PNG_WRITE_iCCP_SUPPORTED
926# ifndef PNG_iCCP_SUPPORTED
927# define PNG_iCCP_SUPPORTED
928# endif
929#endif
930#ifndef PNG_NO_WRITE_iTXt
931# ifndef PNG_WRITE_iTXt_SUPPORTED
932# define PNG_WRITE_iTXt_SUPPORTED
933# endif
934# ifndef PNG_iTXt_SUPPORTED
935# define PNG_iTXt_SUPPORTED
936# endif
937#endif
938#ifndef PNG_NO_WRITE_oFFs
939# define PNG_WRITE_oFFs_SUPPORTED
940# ifndef PNG_oFFs_SUPPORTED
941# define PNG_oFFs_SUPPORTED
942# endif
943#endif
944#ifndef PNG_NO_WRITE_pCAL
945# define PNG_WRITE_pCAL_SUPPORTED
946# ifndef PNG_pCAL_SUPPORTED
947# define PNG_pCAL_SUPPORTED
948# endif
949#endif
950#ifndef PNG_NO_WRITE_sCAL
951# define PNG_WRITE_sCAL_SUPPORTED
952# ifndef PNG_sCAL_SUPPORTED
953# define PNG_sCAL_SUPPORTED
954# endif
955#endif
956#ifndef PNG_NO_WRITE_pHYs
957# define PNG_WRITE_pHYs_SUPPORTED
958# ifndef PNG_pHYs_SUPPORTED
959# define PNG_pHYs_SUPPORTED
960# endif
961#endif
962#ifndef PNG_NO_WRITE_sBIT
963# define PNG_WRITE_sBIT_SUPPORTED
964# ifndef PNG_sBIT_SUPPORTED
965# define PNG_sBIT_SUPPORTED
966# endif
967#endif
968#ifndef PNG_NO_WRITE_sPLT
969# define PNG_WRITE_sPLT_SUPPORTED
970# ifndef PNG_sPLT_SUPPORTED
971# define PNG_sPLT_SUPPORTED
972# endif
973#endif
974#ifndef PNG_NO_WRITE_sRGB
975# define PNG_WRITE_sRGB_SUPPORTED
976# ifndef PNG_sRGB_SUPPORTED
977# define PNG_sRGB_SUPPORTED
978# endif
979#endif
980#ifndef PNG_NO_WRITE_tEXt
981# define PNG_WRITE_tEXt_SUPPORTED
982# ifndef PNG_tEXt_SUPPORTED
983# define PNG_tEXt_SUPPORTED
984# endif
985#endif
986#ifndef PNG_NO_WRITE_tIME
987# define PNG_WRITE_tIME_SUPPORTED
988# ifndef PNG_tIME_SUPPORTED
989# define PNG_tIME_SUPPORTED
990# endif
991#endif
992#ifndef PNG_NO_WRITE_tRNS
993# define PNG_WRITE_tRNS_SUPPORTED
994# ifndef PNG_tRNS_SUPPORTED
995# define PNG_tRNS_SUPPORTED
996# endif
997#endif
998#ifndef PNG_NO_WRITE_zTXt
999# define PNG_WRITE_zTXt_SUPPORTED
1000# ifndef PNG_zTXt_SUPPORTED
1001# define PNG_zTXt_SUPPORTED
1002# endif
1003#endif
1004#ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS
1005# define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1006# ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
1007# define PNG_UNKNOWN_CHUNKS_SUPPORTED
1008# endif
1009# ifndef PNG_NO_HANDLE_AS_UNKNOWN
1010# ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1011# define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1012# endif
1013# endif
1014#endif
1015#if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
1016 defined(PNG_WRITE_zTXt_SUPPORTED)
1017# define PNG_WRITE_TEXT_SUPPORTED
1018# ifndef PNG_TEXT_SUPPORTED
1019# define PNG_TEXT_SUPPORTED
1020# endif
1021#endif
1022
1023#endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */
1024
1025/* Turn this off to disable png_read_png() and
1026 * png_write_png() and leave the row_pointers member
1027 * out of the info structure.
1028 */
1029#ifndef PNG_NO_INFO_IMAGE
1030# define PNG_INFO_IMAGE_SUPPORTED
1031#endif
1032
1033/* need the time information for reading tIME chunks */
1034#if defined(PNG_tIME_SUPPORTED)
1035# if !defined(_WIN32_WCE)
1036 /* "time.h" functions are not supported on WindowsCE */
1037# include <time.h>
1038# endif
1039#endif
1040
1041/* Some typedefs to get us started. These should be safe on most of the
1042 * common platforms. The typedefs should be at least as large as the
1043 * numbers suggest (a png_uint_32 must be at least 32 bits long), but they
1044 * don't have to be exactly that size. Some compilers dislike passing
1045 * unsigned shorts as function parameters, so you may be better off using
1046 * unsigned int for png_uint_16. Likewise, for 64-bit systems, you may
1047 * want to have unsigned int for png_uint_32 instead of unsigned long.
1048 */
1049
1050typedef unsigned long png_uint_32;
1051typedef long png_int_32;
1052typedef unsigned short png_uint_16;
1053typedef short png_int_16;
1054typedef unsigned char png_byte;
1055
1056/* This is usually size_t. It is typedef'ed just in case you need it to
1057 change (I'm not sure if you will or not, so I thought I'd be safe) */
1058#ifdef PNG_SIZE_T
1059 typedef PNG_SIZE_T png_size_t;
1060# define png_sizeof(x) png_convert_size(sizeof (x))
1061#else
1062 typedef size_t png_size_t;
1063# define png_sizeof(x) sizeof (x)
1064#endif
1065
1066/* The following is needed for medium model support. It cannot be in the
1067 * PNG_INTERNAL section. Needs modification for other compilers besides
1068 * MSC. Model independent support declares all arrays and pointers to be
1069 * large using the far keyword. The zlib version used must also support
1070 * model independent data. As of version zlib 1.0.4, the necessary changes
1071 * have been made in zlib. The USE_FAR_KEYWORD define triggers other
1072 * changes that are needed. (Tim Wegner)
1073 */
1074
1075/* Separate compiler dependencies (problem here is that zlib.h always
1076 defines FAR. (SJT) */
1077#ifdef __BORLANDC__
1078# if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)
1079# define LDATA 1
1080# else
1081# define LDATA 0
1082# endif
1083 /* GRR: why is Cygwin in here? Cygwin is not Borland C... */
1084# if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)
1085# define PNG_MAX_MALLOC_64K
1086# if (LDATA != 1)
1087# ifndef FAR
1088# define FAR __far
1089# endif
1090# define USE_FAR_KEYWORD
1091# endif /* LDATA != 1 */
1092 /* Possibly useful for moving data out of default segment.
1093 * Uncomment it if you want. Could also define FARDATA as
1094 * const if your compiler supports it. (SJT)
1095# define FARDATA FAR
1096 */
1097# endif /* __WIN32__, __FLAT__, __CYGWIN__ */
1098#endif /* __BORLANDC__ */
1099
1100
1101/* Suggest testing for specific compiler first before testing for
1102 * FAR. The Watcom compiler defines both __MEDIUM__ and M_I86MM,
1103 * making reliance oncertain keywords suspect. (SJT)
1104 */
1105
1106/* MSC Medium model */
1107#if defined(FAR)
1108# if defined(M_I86MM)
1109# define USE_FAR_KEYWORD
1110# define FARDATA FAR
1111# include <dos.h>
1112# endif
1113#endif
1114
1115/* SJT: default case */
1116#ifndef FAR
1117# define FAR
1118#endif
1119
1120/* At this point FAR is always defined */
1121#ifndef FARDATA
1122# define FARDATA
1123#endif
1124
1125/* Typedef for floating-point numbers that are converted
1126 to fixed-point with a multiple of 100,000, e.g., int_gamma */
1127typedef png_int_32 png_fixed_point;
1128
1129/* Add typedefs for pointers */
1130typedef void FAR * png_voidp;
1131typedef png_byte FAR * png_bytep;
1132typedef png_uint_32 FAR * png_uint_32p;
1133typedef png_int_32 FAR * png_int_32p;
1134typedef png_uint_16 FAR * png_uint_16p;
1135typedef png_int_16 FAR * png_int_16p;
1136typedef PNG_CONST char FAR * png_const_charp;
1137typedef char FAR * png_charp;
1138typedef png_fixed_point FAR * png_fixed_point_p;
1139
1140#ifndef PNG_NO_STDIO
1141#if defined(_WIN32_WCE)
1142typedef HANDLE png_FILE_p;
1143#else
1144typedef FILE * png_FILE_p;
1145#endif
1146#endif
1147
1148#ifdef PNG_FLOATING_POINT_SUPPORTED
1149typedef double FAR * png_doublep;
1150#endif
1151
1152/* Pointers to pointers; i.e. arrays */
1153typedef png_byte FAR * FAR * png_bytepp;
1154typedef png_uint_32 FAR * FAR * png_uint_32pp;
1155typedef png_int_32 FAR * FAR * png_int_32pp;
1156typedef png_uint_16 FAR * FAR * png_uint_16pp;
1157typedef png_int_16 FAR * FAR * png_int_16pp;
1158typedef PNG_CONST char FAR * FAR * png_const_charpp;
1159typedef char FAR * FAR * png_charpp;
1160typedef png_fixed_point FAR * FAR * png_fixed_point_pp;
1161#ifdef PNG_FLOATING_POINT_SUPPORTED
1162typedef double FAR * FAR * png_doublepp;
1163#endif
1164
1165/* Pointers to pointers to pointers; i.e., pointer to array */
1166typedef char FAR * FAR * FAR * png_charppp;
1167
1168#if defined(PNG_1_0_X) || defined(PNG_1_2_X)
1169/* SPC - Is this stuff deprecated? */
1170/* It'll be removed as of libpng-1.3.0 - GR-P */
1171/* libpng typedefs for types in zlib. If zlib changes
1172 * or another compression library is used, then change these.
1173 * Eliminates need to change all the source files.
1174 */
1175typedef charf * png_zcharp;
1176typedef charf * FAR * png_zcharpp;
1177typedef z_stream FAR * png_zstreamp;
1178#endif /* (PNG_1_0_X) || defined(PNG_1_2_X) */
1179
1180/*
1181 * Define PNG_BUILD_DLL if the module being built is a Windows
1182 * LIBPNG DLL.
1183 *
1184 * Define PNG_USE_DLL if you want to *link* to the Windows LIBPNG DLL.
1185 * It is equivalent to Microsoft predefined macro _DLL that is
1186 * automatically defined when you compile using the share
1187 * version of the CRT (C Run-Time library)
1188 *
1189 * The cygwin mods make this behavior a little different:
1190 * Define PNG_BUILD_DLL if you are building a dll for use with cygwin
1191 * Define PNG_STATIC if you are building a static library for use with cygwin,
1192 * -or- if you are building an application that you want to link to the
1193 * static library.
1194 * PNG_USE_DLL is defined by default (no user action needed) unless one of
1195 * the other flags is defined.
1196 */
1197
1198#if !defined(PNG_DLL) && (defined(PNG_BUILD_DLL) || defined(PNG_USE_DLL))
1199# define PNG_DLL
1200#endif
1201/* If CYGWIN, then disallow GLOBAL ARRAYS unless building a static lib.
1202 * When building a static lib, default to no GLOBAL ARRAYS, but allow
1203 * command-line override
1204 */
1205#if defined(__CYGWIN__)
1206# if !defined(PNG_STATIC)
1207# if defined(PNG_USE_GLOBAL_ARRAYS)
1208# undef PNG_USE_GLOBAL_ARRAYS
1209# endif
1210# if !defined(PNG_USE_LOCAL_ARRAYS)
1211# define PNG_USE_LOCAL_ARRAYS
1212# endif
1213# else
1214# if defined(PNG_USE_LOCAL_ARRAYS) || defined(PNG_NO_GLOBAL_ARRAYS)
1215# if defined(PNG_USE_GLOBAL_ARRAYS)
1216# undef PNG_USE_GLOBAL_ARRAYS
1217# endif
1218# endif
1219# endif
1220# if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1221# define PNG_USE_LOCAL_ARRAYS
1222# endif
1223#endif
1224
1225/* Do not use global arrays (helps with building DLL's)
1226 * They are no longer used in libpng itself, since version 1.0.5c,
1227 * but might be required for some pre-1.0.5c applications.
1228 */
1229#if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1230# if defined(PNG_NO_GLOBAL_ARRAYS) || (defined(__GNUC__) && defined(PNG_DLL))
1231# define PNG_USE_LOCAL_ARRAYS
1232# else
1233# define PNG_USE_GLOBAL_ARRAYS
1234# endif
1235#endif
1236
1237#if defined(__CYGWIN__)
1238# undef PNGAPI
1239# define PNGAPI __cdecl
1240# undef PNG_IMPEXP
1241# define PNG_IMPEXP
1242#endif
1243
1244/* If you define PNGAPI, e.g., with compiler option "-DPNGAPI=__stdcall",
1245 * you may get warnings regarding the linkage of png_zalloc and png_zfree.
1246 * Don't ignore those warnings; you must also reset the default calling
1247 * convention in your compiler to match your PNGAPI, and you must build
1248 * zlib and your applications the same way you build libpng.
1249 */
1250
1251#if defined(__MINGW32__) && !defined(PNG_MODULEDEF)
1252# ifndef PNG_NO_MODULEDEF
1253# define PNG_NO_MODULEDEF
1254# endif
1255#endif
1256
1257#if !defined(PNG_IMPEXP) && defined(PNG_BUILD_DLL) && !defined(PNG_NO_MODULEDEF)
1258# define PNG_IMPEXP
1259#endif
1260
1261#if defined(PNG_DLL) || defined(_DLL) || defined(__DLL__ ) || \
1262 (( defined(_Windows) || defined(_WINDOWS) || \
1263 defined(WIN32) || defined(_WIN32) || defined(__WIN32__) ))
1264
1265# ifndef PNGAPI
1266# if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
1267# define PNGAPI __cdecl
1268# else
1269# define PNGAPI _cdecl
1270# endif
1271# endif
1272
1273# if !defined(PNG_IMPEXP) && (!defined(PNG_DLL) || \
1274 0 /* WINCOMPILER_WITH_NO_SUPPORT_FOR_DECLIMPEXP */)
1275# define PNG_IMPEXP
1276# endif
1277
1278# if !defined(PNG_IMPEXP)
1279
1280# define PNG_EXPORT_TYPE1(type,symbol) PNG_IMPEXP type PNGAPI symbol
1281# define PNG_EXPORT_TYPE2(type,symbol) type PNG_IMPEXP PNGAPI symbol
1282
1283 /* Borland/Microsoft */
1284# if defined(_MSC_VER) || defined(__BORLANDC__)
1285# if (_MSC_VER >= 800) || (__BORLANDC__ >= 0x500)
1286# define PNG_EXPORT PNG_EXPORT_TYPE1
1287# else
1288# define PNG_EXPORT PNG_EXPORT_TYPE2
1289# if defined(PNG_BUILD_DLL)
1290# define PNG_IMPEXP __export
1291# else
1292# define PNG_IMPEXP /*__import */ /* doesn't exist AFAIK in
1293 VC++ */
1294# endif /* Exists in Borland C++ for
1295 C++ classes (== huge) */
1296# endif
1297# endif
1298
1299# if !defined(PNG_IMPEXP)
1300# if defined(PNG_BUILD_DLL)
1301# define PNG_IMPEXP __declspec(dllexport)
1302# else
1303# define PNG_IMPEXP __declspec(dllimport)
1304# endif
1305# endif
1306# endif /* PNG_IMPEXP */
1307#else /* !(DLL || non-cygwin WINDOWS) */
1308# if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
1309# ifndef PNGAPI
1310# define PNGAPI _System
1311# endif
1312# else
1313# if 0 /* ... other platforms, with other meanings */
1314# endif
1315# endif
1316#endif
1317
1318#ifndef PNGAPI
1319# define PNGAPI
1320#endif
1321#ifndef PNG_IMPEXP
1322# define PNG_IMPEXP
1323#endif
1324
1325#ifdef PNG_BUILDSYMS
1326# ifndef PNG_EXPORT
1327# define PNG_EXPORT(type,symbol) PNG_FUNCTION_EXPORT symbol END
1328# endif
1329# ifdef PNG_USE_GLOBAL_ARRAYS
1330# ifndef PNG_EXPORT_VAR
1331# define PNG_EXPORT_VAR(type) PNG_DATA_EXPORT
1332# endif
1333# endif
1334#endif
1335
1336#ifndef PNG_EXPORT
1337# define PNG_EXPORT(type,symbol) PNG_IMPEXP type PNGAPI symbol
1338#endif
1339
1340#ifdef PNG_USE_GLOBAL_ARRAYS
1341# ifndef PNG_EXPORT_VAR
1342# define PNG_EXPORT_VAR(type) extern PNG_IMPEXP type
1343# endif
1344#endif
1345
1346/* User may want to use these so they are not in PNG_INTERNAL. Any library
1347 * functions that are passed far data must be model independent.
1348 */
1349
1350#ifndef PNG_ABORT
1351# define PNG_ABORT() abort()
1352#endif
1353
1354#ifdef PNG_SETJMP_SUPPORTED
1355# define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf)
1356#else
1357# define png_jmpbuf(png_ptr) \
1358 (LIBPNG_WAS_COMPILED_WITH__PNG_SETJMP_NOT_SUPPORTED)
1359#endif
1360
1361#if defined(USE_FAR_KEYWORD) /* memory model independent fns */
1362/* use this to make far-to-near assignments */
1363# define CHECK 1
1364# define NOCHECK 0
1365# define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK))
1366# define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK))
1367# define png_strcpy _fstrcpy
1368# define png_strncpy _fstrncpy /* Added to v 1.2.6 */
1369# define png_strlen _fstrlen
1370# define png_memcmp _fmemcmp /* SJT: added */
1371# define png_memcpy _fmemcpy
1372# define png_memset _fmemset
1373#else /* use the usual functions */
1374# define CVT_PTR(ptr) (ptr)
1375# define CVT_PTR_NOCHECK(ptr) (ptr)
1376# define png_strcpy strcpy
1377# define png_strncpy strncpy /* Added to v 1.2.6 */
1378# define png_strlen strlen
1379# define png_memcmp memcmp /* SJT: added */
1380# define png_memcpy memcpy
1381# define png_memset memset
1382#endif
1383/* End of memory model independent support */
1384
1385/* Just a little check that someone hasn't tried to define something
1386 * contradictory.
1387 */
1388#if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K)
1389# undef PNG_ZBUF_SIZE
1390# define PNG_ZBUF_SIZE 65536L
1391#endif
1392
1393#ifdef PNG_READ_SUPPORTED
1394/* Prior to libpng-1.0.9, this block was in pngasmrd.h */
1395#if defined(PNG_INTERNAL)
1396
1397/* These are the default thresholds before the MMX code kicks in; if either
1398 * rowbytes or bitdepth is below the threshold, plain C code is used. These
1399 * can be overridden at runtime via the png_set_mmx_thresholds() call in
1400 * libpng 1.2.0 and later. The values below were chosen by Intel.
1401 */
1402
1403#ifndef PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT
1404# define PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT 128 /* >= */
1405#endif
1406#ifndef PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT
1407# define PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT 9 /* >= */
1408#endif
1409
1410/* Set this in the makefile for VC++ on Pentium, not here. */
1411/* Platform must be Pentium. Makefile must assemble and load pngvcrd.c .
1412 * MMX will be detected at run time and used if present.
1413 */
1414#ifdef PNG_USE_PNGVCRD
1415# define PNG_HAVE_ASSEMBLER_COMBINE_ROW
1416# define PNG_HAVE_ASSEMBLER_READ_INTERLACE
1417# define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
1418#endif
1419
1420/* Set this in the makefile for gcc/as on Pentium, not here. */
1421/* Platform must be Pentium. Makefile must assemble and load pnggccrd.c .
1422 * MMX will be detected at run time and used if present.
1423 */
1424#ifdef PNG_USE_PNGGCCRD
1425# define PNG_HAVE_ASSEMBLER_COMBINE_ROW
1426# define PNG_HAVE_ASSEMBLER_READ_INTERLACE
1427# define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
1428#endif
1429/* - see pnggccrd.c for info about what is currently enabled */
1430
1431#endif /* PNG_INTERNAL */
1432#endif /* PNG_READ_SUPPORTED */
1433
1434/* Added at libpng-1.2.8 */
1435#endif /* PNG_VERSION_INFO_ONLY */
1436
1437#endif /* PNGCONF_H */
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