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75b6e0a0
GD		 1/* pngconf.h - machine configurable file for libpng
2 *
2b5f62a0 3 * libpng 1.2.5rc3 - September 18, 2002
75b6e0a0 4 * For conditions of distribution and use, see copyright notice in png.h
4946a942
GD		 5 * Copyright (c) 1998-2002 Glenn Randers-Pehrson
6 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
7 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
75b6e0a0
GD		 8 */
9
10/* Any machine specific code is near the front of this file, so if you
11 * are configuring libpng for a machine, you may want to read the section
12 * starting here down to where it starts to typedef png_color, png_text,
13 * and png_info.
14 */
15
16#ifndef PNGCONF_H
17#define PNGCONF_H
18
75b6e0a0
GD		 19/* This is the size of the compression buffer, and thus the size of
20 * an IDAT chunk. Make this whatever size you feel is best for your
21 * machine. One of these will be allocated per png_struct. When this
22 * is full, it writes the data to the disk, and does some other
23 * calculations. Making this an extremely small size will slow
24 * the library down, but you may want to experiment to determine
25 * where it becomes significant, if you are concerned with memory
26 * usage. Note that zlib allocates at least 32Kb also. For readers,
27 * this describes the size of the buffer available to read the data in.
28 * Unless this gets smaller than the size of a row (compressed),
29 * it should not make much difference how big this is.
30 */
31
32#ifndef PNG_ZBUF_SIZE
4946a942
GD		 33# define PNG_ZBUF_SIZE 8192
34#endif
35
36/* Enable if you want a write-only libpng */
37
38#ifndef PNG_NO_READ_SUPPORTED
39# define PNG_READ_SUPPORTED
40#endif
41
42/* Enable if you want a read-only libpng */
43
44#ifndef PNG_NO_WRITE_SUPPORTED
45# define PNG_WRITE_SUPPORTED
46#endif
47
48/* Enabled by default in 1.2.0. You can disable this if you don't need to
49 support PNGs that are embedded in MNG datastreams */
50#if !defined(PNG_1_0_X) && !defined(PNG_NO_MNG_FEATURES)
51# ifndef PNG_MNG_FEATURES_SUPPORTED
52# define PNG_MNG_FEATURES_SUPPORTED
53# endif
54#endif
55
56#ifndef PNG_NO_FLOATING_POINT_SUPPORTED
57# ifndef PNG_FLOATING_POINT_SUPPORTED
58# define PNG_FLOATING_POINT_SUPPORTED
59# endif
75b6e0a0
GD		 60#endif
61
62/* If you are running on a machine where you cannot allocate more
63 * than 64K of memory at once, uncomment this. While libpng will not
64 * normally need that much memory in a chunk (unless you load up a very
65 * large file), zlib needs to know how big of a chunk it can use, and
66 * libpng thus makes sure to check any memory allocation to verify it
67 * will fit into memory.
68#define PNG_MAX_MALLOC_64K
69 */
70#if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
4946a942
GD		 71# define PNG_MAX_MALLOC_64K
72#endif
73
74/* Special munging to support doing things the 'cygwin' way:
75 * 'Normal' png-on-win32 defines/defaults:
76 * PNG_BUILD_DLL -- building dll
77 * PNG_USE_DLL -- building an application, linking to dll
78 * (no define) -- building static library, or building an
79 * application and linking to the static lib
80 * 'Cygwin' defines/defaults:
81 * PNG_BUILD_DLL -- (ignored) building the dll
82 * (no define) -- (ignored) building an application, linking to the dll
77aecce0 83 * PNG_STATIC -- (ignored) building the static lib, or building an
4946a942 84 * application that links to the static lib.
77aecce0 85 * ALL_STATIC -- (ignored) building various static libs, or building an
4946a942
GD		 86 * application that links to the static libs.
87 * Thus,
88 * a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and
89 * this bit of #ifdefs will define the 'correct' config variables based on
90 * that. If a cygwin user *wants* to define 'PNG_USE_DLL' that's okay, but
91 * unnecessary.
92 *
93 * Also, the precedence order is:
94 * ALL_STATIC (since we can't #undef something outside our namespace)
95 * PNG_BUILD_DLL
96 * PNG_STATIC
97 * (nothing) == PNG_USE_DLL
77aecce0 98 *
4946a942 99 * CYGWIN (2002-01-20): The preceding is now obsolete. With the advent
77aecce0 100 * of auto-import in binutils, we no longer need to worry about
4946a942
GD		 101 * __declspec(dllexport) / __declspec(dllimport) and friends. Therefore,
102 * we don't need to worry about PNG_STATIC or ALL_STATIC when it comes
77aecce0 103 * to __declspec() stuff. However, we DO need to worry about
4946a942
GD		 104 * PNG_BUILD_DLL and PNG_STATIC because those change some defaults
105 * such as CONSOLE_IO and whether GLOBAL_ARRAYS are allowed.
106 */
107#if defined(__CYGWIN__)
108# if defined(ALL_STATIC)
109# if defined(PNG_BUILD_DLL)
110# undef PNG_BUILD_DLL
111# endif
112# if defined(PNG_USE_DLL)
113# undef PNG_USE_DLL
114# endif
115# if defined(PNG_DLL)
116# undef PNG_DLL
117# endif
118# if !defined(PNG_STATIC)
119# define PNG_STATIC
120# endif
121# else
122# if defined (PNG_BUILD_DLL)
123# if defined(PNG_STATIC)
124# undef PNG_STATIC
125# endif
126# if defined(PNG_USE_DLL)
127# undef PNG_USE_DLL
128# endif
129# if !defined(PNG_DLL)
130# define PNG_DLL
131# endif
132# else
133# if defined(PNG_STATIC)
134# if defined(PNG_USE_DLL)
135# undef PNG_USE_DLL
136# endif
137# if defined(PNG_DLL)
138# undef PNG_DLL
139# endif
140# else
141# if !defined(PNG_USE_DLL)
142# define PNG_USE_DLL
143# endif
144# if !defined(PNG_DLL)
145# define PNG_DLL
146# endif
77aecce0
DW		 147# endif
148# endif
4946a942 149# endif
75b6e0a0
GD		 150#endif
151
152/* This protects us against compilers that run on a windowing system
153 * and thus don't have or would rather us not use the stdio types:
154 * stdin, stdout, and stderr. The only one currently used is stderr
155 * in png_error() and png_warning(). #defining PNG_NO_CONSOLE_IO will
156 * prevent these from being compiled and used. #defining PNG_NO_STDIO
157 * will also prevent these, plus will prevent the entire set of stdio
158 * macros and functions (FILE *, printf, etc.) from being compiled and used,
4946a942 159 * unless (PNG_DEBUG > 0) has been #defined.
75b6e0a0
GD		 160 *
161 * #define PNG_NO_CONSOLE_IO
162 * #define PNG_NO_STDIO
163 */
164
4946a942
GD		 165#if defined(_WIN32_WCE)
166# include <windows.h>
167 /* Console I/O functions are not supported on WindowsCE */
168# define PNG_NO_CONSOLE_IO
169# ifdef PNG_DEBUG
170# undef PNG_DEBUG
75b6e0a0 171# endif
4946a942
GD		 172#endif
173
174#ifdef PNG_BUILD_DLL
175# ifndef PNG_CONSOLE_IO_SUPPORTED
176# ifndef PNG_NO_CONSOLE_IO
177# define PNG_NO_CONSOLE_IO
178# endif
179# endif
180#endif
181
75b6e0a0
GD		 182# ifdef PNG_NO_STDIO
183# ifndef PNG_NO_CONSOLE_IO
184# define PNG_NO_CONSOLE_IO
185# endif
4946a942
GD		 186# ifdef PNG_DEBUG
187# if (PNG_DEBUG > 0)
188# include <stdio.h>
189# endif
190# endif
75b6e0a0 191# else
4946a942
GD		 192# if !defined(_WIN32_WCE)
193/* "stdio.h" functions are not supported on WindowsCE */
194# include <stdio.h>
195# endif
75b6e0a0 196# endif
75b6e0a0
GD		 197
198/* This macro protects us against machines that don't have function
199 * prototypes (ie K&R style headers). If your compiler does not handle
200 * function prototypes, define this macro and use the included ansi2knr.
201 * I've always been able to use _NO_PROTO as the indicator, but you may
202 * need to drag the empty declaration out in front of here, or change the
203 * ifdef to suit your own needs.
204 */
205#ifndef PNGARG
206
207#ifdef OF /* zlib prototype munger */
4946a942 208# define PNGARG(arglist) OF(arglist)
75b6e0a0
GD		 209#else
210
211#ifdef _NO_PROTO
4946a942
GD		 212# define PNGARG(arglist) ()
213# ifndef PNG_TYPECAST_NULL
214# define PNG_TYPECAST_NULL
215# endif
75b6e0a0 216#else
4946a942 217# define PNGARG(arglist) arglist
75b6e0a0
GD		 218#endif /* _NO_PROTO */
219
220#endif /* OF */
221
222#endif /* PNGARG */
223
224/* Try to determine if we are compiling on a Mac. Note that testing for
225 * just __MWERKS__ is not good enough, because the Codewarrior is now used
226 * on non-Mac platforms.
227 */
228#ifndef MACOS
4946a942 229# if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
7d584866 230 defined(THINK_C) || (defined(__SC__) && !defined(__DMC__))|| defined(TARGET_OS_MAC)
4946a942
GD		 231# define MACOS
232# endif
75b6e0a0
GD		 233#endif
234
235/* enough people need this for various reasons to include it here */
4946a942
GD		 236#if !defined(MACOS) && !defined(RISCOS) && !defined(_WIN32_WCE)
237# include <sys/types.h>
238#endif
239
240#if !defined(PNG_SETJMP_NOT_SUPPORTED) && !defined(PNG_NO_SETJMP_SUPPORTED)
241# define PNG_SETJMP_SUPPORTED
75b6e0a0
GD		 242#endif
243
4946a942 244#ifdef PNG_SETJMP_SUPPORTED
75b6e0a0
GD		 245/* This is an attempt to force a single setjmp behaviour on Linux. If
246 * the X config stuff didn't define _BSD_SOURCE we wouldn't need this.
247 */
75b6e0a0 248
4946a942
GD		 249# ifdef __linux__
250# ifdef _BSD_SOURCE
251# define PNG_SAVE_BSD_SOURCE
252# undef _BSD_SOURCE
253# endif
254# ifdef _SETJMP_H
255 __png.h__ already includes setjmp.h;
256 __dont__ include it again.;
257# endif
258# endif /* __linux__ */
259
260 /* include setjmp.h for error handling */
261# include <setjmp.h>
75b6e0a0 262
4946a942
GD		 263# ifdef __linux__
264# ifdef PNG_SAVE_BSD_SOURCE
265# define _BSD_SOURCE
266# undef PNG_SAVE_BSD_SOURCE
267# endif
268# endif /* __linux__ */
269#endif /* PNG_SETJMP_SUPPORTED */
75b6e0a0
GD		 270
271#ifdef BSD
4946a942 272# include <strings.h>
75b6e0a0 273#else
4946a942 274# include <string.h>
75b6e0a0
GD		 275#endif
276
277/* Other defines for things like memory and the like can go here. */
278#ifdef PNG_INTERNAL
4946a942 279
75b6e0a0
GD		 280#include <stdlib.h>
281
282/* The functions exported by PNG_EXTERN are PNG_INTERNAL functions, which
283 * aren't usually used outside the library (as far as I know), so it is
284 * debatable if they should be exported at all. In the future, when it is
285 * possible to have run-time registry of chunk-handling functions, some of
286 * these will be made available again.
287#define PNG_EXTERN extern
288 */
289#define PNG_EXTERN
290
291/* Other defines specific to compilers can go here. Try to keep
292 * them inside an appropriate ifdef/endif pair for portability.
293 */
294
4946a942
GD		 295#if defined(PNG_FLOATING_POINT_SUPPORTED)
296# if defined(MACOS)
297 /* We need to check that <math.h> hasn't already been included earlier
298 * as it seems it doesn't agree with <fp.h>, yet we should really use
299 * <fp.h> if possible.
300 */
301# if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__)
302# include <fp.h>
303# endif
304# else
305# include <math.h>
306# endif
307# if defined(_AMIGA) && defined(__SASC) && defined(_M68881)
308 /* Amiga SAS/C: We must include builtin FPU functions when compiling using
309 * MATH=68881
310 */
311# include <m68881.h>
312# endif
75b6e0a0
GD		 313#endif
314
315/* Codewarrior on NT has linking problems without this. */
4946a942
GD		 316#if (defined(__MWERKS__) && defined(WIN32)) || defined(__STDC__)
317# define PNG_ALWAYS_EXTERN
75b6e0a0
GD		 318#endif
319
320/* For some reason, Borland C++ defines memcmp, etc. in mem.h, not
321 * stdlib.h like it should (I think). Or perhaps this is a C++
322 * "feature"?
323 */
324#ifdef __TURBOC__
4946a942
GD		 325# include <mem.h>
326# include "alloc.h"
75b6e0a0
GD		 327#endif
328
4946a942
GD		 329#if defined(_MSC_VER) && (defined(WIN32) || defined(_Windows) || \
330 defined(_WINDOWS) || defined(_WIN32) || defined(__WIN32__))
331# include <malloc.h>
75b6e0a0
GD		 332#endif
333
334/* This controls how fine the dithering gets. As this allocates
335 * a largish chunk of memory (32K), those who are not as concerned
336 * with dithering quality can decrease some or all of these.
337 */
338#ifndef PNG_DITHER_RED_BITS
4946a942 339# define PNG_DITHER_RED_BITS 5
75b6e0a0
GD		 340#endif
341#ifndef PNG_DITHER_GREEN_BITS
4946a942 342# define PNG_DITHER_GREEN_BITS 5
75b6e0a0
GD		 343#endif
344#ifndef PNG_DITHER_BLUE_BITS
4946a942 345# define PNG_DITHER_BLUE_BITS 5
75b6e0a0
GD		 346#endif
347
348/* This controls how fine the gamma correction becomes when you
349 * are only interested in 8 bits anyway. Increasing this value
350 * results in more memory being used, and more pow() functions
351 * being called to fill in the gamma tables. Don't set this value
352 * less then 8, and even that may not work (I haven't tested it).
353 */
354
355#ifndef PNG_MAX_GAMMA_8
4946a942 356# define PNG_MAX_GAMMA_8 11
75b6e0a0
GD		 357#endif
358
359/* This controls how much a difference in gamma we can tolerate before
360 * we actually start doing gamma conversion.
361 */
362#ifndef PNG_GAMMA_THRESHOLD
4946a942 363# define PNG_GAMMA_THRESHOLD 0.05
75b6e0a0
GD		 364#endif
365
366#endif /* PNG_INTERNAL */
367
368/* The following uses const char * instead of char * for error
369 * and warning message functions, so some compilers won't complain.
370 * If you do not want to use const, define PNG_NO_CONST here.
371 */
372
373#ifndef PNG_NO_CONST
374# define PNG_CONST const
375#else
376# define PNG_CONST
377#endif
378
379/* The following defines give you the ability to remove code from the
380 * library that you will not be using. I wish I could figure out how to
381 * automate this, but I can't do that without making it seriously hard
382 * on the users. So if you are not using an ability, change the #define
383 * to and #undef, and that part of the library will not be compiled. If
384 * your linker can't find a function, you may want to make sure the
385 * ability is defined here. Some of these depend upon some others being
386 * defined. I haven't figured out all the interactions here, so you may
387 * have to experiment awhile to get everything to compile. If you are
388 * creating or using a shared library, you probably shouldn't touch this,
389 * as it will affect the size of the structures, and this will cause bad
390 * things to happen if the library and/or application ever change.
391 */
392
4946a942 393/* Any features you will not be using can be undef'ed here */
75b6e0a0
GD		 394
395/* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user
4946a942
GD		 396 * to turn it off with "*TRANSFORMS_NOT_SUPPORTED" or *PNG_NO_*_TRANSFORMS
397 * on the compile line, then pick and choose which ones to define without
398 * having to edit this file. It is safe to use the *TRANSFORMS_NOT_SUPPORTED
399 * if you only want to have a png-compliant reader/writer but don't need
400 * any of the extra transformations. This saves about 80 kbytes in a
401 * typical installation of the library. (PNG_NO_* form added in version
402 * 1.0.1c, for consistency)
75b6e0a0
GD		 403 */
404
4946a942
GD		 405/* The size of the png_text structure changed in libpng-1.0.6 when
406 * iTXt is supported. It is turned off by default, to support old apps
407 * that malloc the png_text structure instead of calling png_set_text()
408 * and letting libpng malloc it. It will be turned on by default in
409 * libpng-1.3.0.
410 */
75b6e0a0 411
4946a942
GD		 412#ifndef PNG_iTXt_SUPPORTED
413# if !defined(PNG_READ_iTXt_SUPPORTED) && !defined(PNG_NO_READ_iTXt)
414# define PNG_NO_READ_iTXt
415# endif
416# if !defined(PNG_WRITE_iTXt_SUPPORTED) && !defined(PNG_NO_WRITE_iTXt)
417# define PNG_NO_WRITE_iTXt
418# endif
75b6e0a0 419#endif
4946a942
GD		 420
421/* The following support, added after version 1.0.0, can be turned off here en
422 * masse by defining PNG_LEGACY_SUPPORTED in case you need binary compatibility
423 * with old applications that require the length of png_struct and png_info
424 * to remain unchanged.
425 */
426
427#ifdef PNG_LEGACY_SUPPORTED
428# define PNG_NO_FREE_ME
429# define PNG_NO_READ_UNKNOWN_CHUNKS
430# define PNG_NO_WRITE_UNKNOWN_CHUNKS
431# define PNG_NO_READ_USER_CHUNKS
432# define PNG_NO_READ_iCCP
433# define PNG_NO_WRITE_iCCP
434# define PNG_NO_READ_iTXt
435# define PNG_NO_WRITE_iTXt
436# define PNG_NO_READ_sCAL
437# define PNG_NO_WRITE_sCAL
438# define PNG_NO_READ_sPLT
439# define PNG_NO_WRITE_sPLT
440# define PNG_NO_INFO_IMAGE
441# define PNG_NO_READ_RGB_TO_GRAY
442# define PNG_NO_READ_USER_TRANSFORM
443# define PNG_NO_WRITE_USER_TRANSFORM
444# define PNG_NO_USER_MEM
445# define PNG_NO_READ_EMPTY_PLTE
446# define PNG_NO_MNG_FEATURES
447# define PNG_NO_FIXED_POINT_SUPPORTED
448#endif
449
450/* Ignore attempt to turn off both floating and fixed point support */
451#if !defined(PNG_FLOATING_POINT_SUPPORTED) || \
452 !defined(PNG_NO_FIXED_POINT_SUPPORTED)
453# define PNG_FIXED_POINT_SUPPORTED
454#endif
455
456#ifndef PNG_NO_FREE_ME
457# define PNG_FREE_ME_SUPPORTED
458#endif
459
460#if defined(PNG_READ_SUPPORTED)
461
462#if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \
463 !defined(PNG_NO_READ_TRANSFORMS)
464# define PNG_READ_TRANSFORMS_SUPPORTED
75b6e0a0
GD		 465#endif
466
467#ifdef PNG_READ_TRANSFORMS_SUPPORTED
4946a942
GD		 468# ifndef PNG_NO_READ_EXPAND
469# define PNG_READ_EXPAND_SUPPORTED
470# endif
471# ifndef PNG_NO_READ_SHIFT
472# define PNG_READ_SHIFT_SUPPORTED
473# endif
474# ifndef PNG_NO_READ_PACK
475# define PNG_READ_PACK_SUPPORTED
476# endif
477# ifndef PNG_NO_READ_BGR
478# define PNG_READ_BGR_SUPPORTED
479# endif
480# ifndef PNG_NO_READ_SWAP
481# define PNG_READ_SWAP_SUPPORTED
482# endif
483# ifndef PNG_NO_READ_PACKSWAP
484# define PNG_READ_PACKSWAP_SUPPORTED
485# endif
486# ifndef PNG_NO_READ_INVERT
487# define PNG_READ_INVERT_SUPPORTED
488# endif
489# ifndef PNG_NO_READ_DITHER
490# define PNG_READ_DITHER_SUPPORTED
491# endif
492# ifndef PNG_NO_READ_BACKGROUND
493# define PNG_READ_BACKGROUND_SUPPORTED
494# endif
495# ifndef PNG_NO_READ_16_TO_8
496# define PNG_READ_16_TO_8_SUPPORTED
497# endif
498# ifndef PNG_NO_READ_FILLER
499# define PNG_READ_FILLER_SUPPORTED
500# endif
501# ifndef PNG_NO_READ_GAMMA
502# define PNG_READ_GAMMA_SUPPORTED
503# endif
504# ifndef PNG_NO_READ_GRAY_TO_RGB
505# define PNG_READ_GRAY_TO_RGB_SUPPORTED
506# endif
507# ifndef PNG_NO_READ_SWAP_ALPHA
508# define PNG_READ_SWAP_ALPHA_SUPPORTED
509# endif
510# ifndef PNG_NO_READ_INVERT_ALPHA
511# define PNG_READ_INVERT_ALPHA_SUPPORTED
512# endif
513# ifndef PNG_NO_READ_STRIP_ALPHA
514# define PNG_READ_STRIP_ALPHA_SUPPORTED
515# endif
516# ifndef PNG_NO_READ_USER_TRANSFORM
517# define PNG_READ_USER_TRANSFORM_SUPPORTED
518# endif
519# ifndef PNG_NO_READ_RGB_TO_GRAY
520# define PNG_READ_RGB_TO_GRAY_SUPPORTED
521# endif
75b6e0a0
GD		 522#endif /* PNG_READ_TRANSFORMS_SUPPORTED */
523
524#if !defined(PNG_NO_PROGRESSIVE_READ) && \
4946a942
GD		 525 !defined(PNG_PROGRESSIVE_READ_NOT_SUPPORTED) /* if you don't do progressive */
526# define PNG_PROGRESSIVE_READ_SUPPORTED /* reading. This is not talking */
75b6e0a0
GD		 527#endif /* about interlacing capability! You'll */
528 /* still have interlacing unless you change the following line: */
4946a942 529
75b6e0a0
GD		 530#define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */
531
4946a942
GD		 532#ifndef PNG_NO_READ_COMPOSITE_NODIV
533# ifndef PNG_NO_READ_COMPOSITED_NODIV /* libpng-1.0.x misspelling */
534# define PNG_READ_COMPOSITE_NODIV_SUPPORTED /* well tested on Intel, SGI */
535# endif
75b6e0a0
GD		 536#endif
537
4946a942
GD		 538/* Deprecated, will be removed from version 2.0.0.
539 Use PNG_MNG_FEATURES_SUPPORTED instead. */
540#ifndef PNG_NO_READ_EMPTY_PLTE
541# define PNG_READ_EMPTY_PLTE_SUPPORTED
75b6e0a0 542#endif
4946a942
GD		 543
544#endif /* PNG_READ_SUPPORTED */
545
546#if defined(PNG_WRITE_SUPPORTED)
547
548# if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \
549 !defined(PNG_NO_WRITE_TRANSFORMS)
550# define PNG_WRITE_TRANSFORMS_SUPPORTED
75b6e0a0 551#endif
4946a942
GD		 552
553#ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
554# ifndef PNG_NO_WRITE_SHIFT
555# define PNG_WRITE_SHIFT_SUPPORTED
556# endif
557# ifndef PNG_NO_WRITE_PACK
558# define PNG_WRITE_PACK_SUPPORTED
559# endif
560# ifndef PNG_NO_WRITE_BGR
561# define PNG_WRITE_BGR_SUPPORTED
562# endif
563# ifndef PNG_NO_WRITE_SWAP
564# define PNG_WRITE_SWAP_SUPPORTED
565# endif
566# ifndef PNG_NO_WRITE_PACKSWAP
567# define PNG_WRITE_PACKSWAP_SUPPORTED
568# endif
569# ifndef PNG_NO_WRITE_INVERT
570# define PNG_WRITE_INVERT_SUPPORTED
571# endif
572# ifndef PNG_NO_WRITE_FILLER
573# define PNG_WRITE_FILLER_SUPPORTED /* same as WRITE_STRIP_ALPHA */
574# endif
575# ifndef PNG_NO_WRITE_SWAP_ALPHA
576# define PNG_WRITE_SWAP_ALPHA_SUPPORTED
577# endif
578# ifndef PNG_NO_WRITE_INVERT_ALPHA
579# define PNG_WRITE_INVERT_ALPHA_SUPPORTED
580# endif
581# ifndef PNG_NO_WRITE_USER_TRANSFORM
582# define PNG_WRITE_USER_TRANSFORM_SUPPORTED
583# endif
75b6e0a0
GD		 584#endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */
585
4946a942
GD		 586#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
587 defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
588# ifndef PNG_NO_USER_TRANSFORM_PTR
589# define PNG_USER_TRANSFORM_PTR_SUPPORTED
590# endif
591#endif
592
75b6e0a0
GD		 593#define PNG_WRITE_INTERLACING_SUPPORTED /* not required for PNG-compliant
594 encoders, but can cause trouble
595 if left undefined */
596
4946a942
GD		 597#if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \
598 defined(PNG_FLOATING_POINT_SUPPORTED)
599# define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
75b6e0a0
GD		 600#endif
601
4946a942
GD		 602#ifndef PNG_1_0_X
603#ifndef PNG_NO_ERROR_NUMBERS
604#define PNG_ERROR_NUMBERS_SUPPORTED
605#endif
606#endif /* PNG_1_0_X */
607
75b6e0a0 608#ifndef PNG_NO_WRITE_FLUSH
4946a942
GD		 609# define PNG_WRITE_FLUSH_SUPPORTED
610#endif
611
612/* Deprecated, see PNG_MNG_FEATURES_SUPPORTED, above */
613#ifndef PNG_NO_WRITE_EMPTY_PLTE
614# define PNG_WRITE_EMPTY_PLTE_SUPPORTED
75b6e0a0
GD		 615#endif
616
4946a942
GD		 617#endif /* PNG_WRITE_SUPPORTED */
618
75b6e0a0 619#ifndef PNG_NO_STDIO
4946a942 620# define PNG_TIME_RFC1123_SUPPORTED
75b6e0a0
GD		 621#endif
622
623/* This adds extra functions in pngget.c for accessing data from the
624 * info pointer (added in version 0.99)
625 * png_get_image_width()
626 * png_get_image_height()
627 * png_get_bit_depth()
628 * png_get_color_type()
629 * png_get_compression_type()
630 * png_get_filter_type()
631 * png_get_interlace_type()
632 * png_get_pixel_aspect_ratio()
633 * png_get_pixels_per_meter()
634 * png_get_x_offset_pixels()
635 * png_get_y_offset_pixels()
636 * png_get_x_offset_microns()
637 * png_get_y_offset_microns()
638 */
4946a942
GD		 639#if !defined(PNG_NO_EASY_ACCESS) && !defined(PNG_EASY_ACCESS_SUPPORTED)
640# define PNG_EASY_ACCESS_SUPPORTED
641#endif
642
77aecce0 643/* PNG_ASSEMBLER_CODE was enabled by default in version 1.2.0
4946a942
GD		 644 even when PNG_USE_PNGVCRD or PNG_USE_PNGGCCRD is not defined */
645#if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_ASSEMBLER_CODE)
646# ifndef PNG_ASSEMBLER_CODE_SUPPORTED
647# define PNG_ASSEMBLER_CODE_SUPPORTED
648# endif
649# if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
650# define PNG_MMX_CODE_SUPPORTED
651# endif
75b6e0a0
GD		 652#endif
653
4946a942
GD		 654/* If you are sure that you don't need thread safety and you are compiling
655 with PNG_USE_PNGCCRD for an MMX application, you can define this for
656 faster execution. See pnggccrd.c.
657#define PNG_THREAD_UNSAFE_OK
658*/
659
660#if !defined(PNG_1_0_X)
661#if !defined(PNG_NO_USER_MEM) && !defined(PNG_USER_MEM_SUPPORTED)
662# define PNG_USER_MEM_SUPPORTED
663#endif
664#endif /* PNG_1_0_X */
665
75b6e0a0
GD		 666/* These are currently experimental features, define them if you want */
667
668/* very little testing */
669/*
4946a942
GD		 670#ifdef PNG_READ_SUPPORTED
671# ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
672# define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
673# endif
674#endif
75b6e0a0
GD		 675*/
676
677/* This is only for PowerPC big-endian and 680x0 systems */
678/* some testing */
679/*
4946a942
GD		 680#ifdef PNG_READ_SUPPORTED
681# ifndef PNG_PNG_READ_BIG_ENDIAN_SUPPORTED
682# define PNG_READ_BIG_ENDIAN_SUPPORTED
683# endif
684#endif
685*/
686
687/* Buggy compilers (e.g., gcc 2.7.2.2) need this */
688/*
689#define PNG_NO_POINTER_INDEXING
75b6e0a0
GD		 690*/
691
692/* These functions are turned off by default, as they will be phased out. */
693/*
694#define PNG_USELESS_TESTS_SUPPORTED
695#define PNG_CORRECT_PALETTE_SUPPORTED
696*/
697
698/* Any chunks you are not interested in, you can undef here. The
699 * ones that allocate memory may be expecially important (hIST,
700 * tEXt, zTXt, tRNS, pCAL). Others will just save time and make png_info
701 * a bit smaller.
702 */
703
4946a942
GD		 704#if defined(PNG_READ_SUPPORTED) && \
705 !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
75b6e0a0 706 !defined(PNG_NO_READ_ANCILLARY_CHUNKS)
4946a942 707# define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
75b6e0a0 708#endif
4946a942
GD		 709
710#if defined(PNG_WRITE_SUPPORTED) && \
711 !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
75b6e0a0 712 !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS)
4946a942 713# define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
75b6e0a0
GD		 714#endif
715
716#ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
4946a942
GD		 717
718#ifdef PNG_NO_READ_TEXT
719# define PNG_NO_READ_iTXt
720# define PNG_NO_READ_tEXt
721# define PNG_NO_READ_zTXt
722#endif
75b6e0a0 723#ifndef PNG_NO_READ_bKGD
4946a942
GD		 724# define PNG_READ_bKGD_SUPPORTED
725# define PNG_bKGD_SUPPORTED
75b6e0a0
GD		 726#endif
727#ifndef PNG_NO_READ_cHRM
4946a942
GD		 728# define PNG_READ_cHRM_SUPPORTED
729# define PNG_cHRM_SUPPORTED
75b6e0a0
GD		 730#endif
731#ifndef PNG_NO_READ_gAMA
4946a942
GD		 732# define PNG_READ_gAMA_SUPPORTED
733# define PNG_gAMA_SUPPORTED
75b6e0a0
GD		 734#endif
735#ifndef PNG_NO_READ_hIST
4946a942
GD		 736# define PNG_READ_hIST_SUPPORTED
737# define PNG_hIST_SUPPORTED
738#endif
739#ifndef PNG_NO_READ_iCCP
740# define PNG_READ_iCCP_SUPPORTED
741# define PNG_iCCP_SUPPORTED
742#endif
743#ifndef PNG_NO_READ_iTXt
744# ifndef PNG_READ_iTXt_SUPPORTED
745# define PNG_READ_iTXt_SUPPORTED
746# endif
747# ifndef PNG_iTXt_SUPPORTED
748# define PNG_iTXt_SUPPORTED
749# endif
75b6e0a0
GD		 750#endif
751#ifndef PNG_NO_READ_oFFs
4946a942
GD		 752# define PNG_READ_oFFs_SUPPORTED
753# define PNG_oFFs_SUPPORTED
75b6e0a0
GD		 754#endif
755#ifndef PNG_NO_READ_pCAL
4946a942
GD		 756# define PNG_READ_pCAL_SUPPORTED
757# define PNG_pCAL_SUPPORTED
758#endif
759#ifndef PNG_NO_READ_sCAL
760# define PNG_READ_sCAL_SUPPORTED
761# define PNG_sCAL_SUPPORTED
75b6e0a0
GD		 762#endif
763#ifndef PNG_NO_READ_pHYs
4946a942
GD		 764# define PNG_READ_pHYs_SUPPORTED
765# define PNG_pHYs_SUPPORTED
75b6e0a0
GD		 766#endif
767#ifndef PNG_NO_READ_sBIT
4946a942
GD		 768# define PNG_READ_sBIT_SUPPORTED
769# define PNG_sBIT_SUPPORTED
770#endif
771#ifndef PNG_NO_READ_sPLT
772# define PNG_READ_sPLT_SUPPORTED
773# define PNG_sPLT_SUPPORTED
75b6e0a0
GD		 774#endif
775#ifndef PNG_NO_READ_sRGB
4946a942
GD		 776# define PNG_READ_sRGB_SUPPORTED
777# define PNG_sRGB_SUPPORTED
75b6e0a0
GD		 778#endif
779#ifndef PNG_NO_READ_tEXt
4946a942
GD		 780# define PNG_READ_tEXt_SUPPORTED
781# define PNG_tEXt_SUPPORTED
75b6e0a0
GD		 782#endif
783#ifndef PNG_NO_READ_tIME
4946a942
GD		 784# define PNG_READ_tIME_SUPPORTED
785# define PNG_tIME_SUPPORTED
75b6e0a0
GD		 786#endif
787#ifndef PNG_NO_READ_tRNS
4946a942
GD		 788# define PNG_READ_tRNS_SUPPORTED
789# define PNG_tRNS_SUPPORTED
75b6e0a0
GD		 790#endif
791#ifndef PNG_NO_READ_zTXt
4946a942
GD		 792# define PNG_READ_zTXt_SUPPORTED
793# define PNG_zTXt_SUPPORTED
794#endif
795#ifndef PNG_NO_READ_UNKNOWN_CHUNKS
796# define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
797# ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
798# define PNG_UNKNOWN_CHUNKS_SUPPORTED
799# endif
800# ifndef PNG_NO_HANDLE_AS_UNKNOWN
801# define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
802# endif
803#endif
804#if !defined(PNG_NO_READ_USER_CHUNKS) && \
805 defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
806# define PNG_READ_USER_CHUNKS_SUPPORTED
807# define PNG_USER_CHUNKS_SUPPORTED
808# ifdef PNG_NO_READ_UNKNOWN_CHUNKS
809# undef PNG_NO_READ_UNKNOWN_CHUNKS
810# endif
811# ifdef PNG_NO_HANDLE_AS_UNKNOWN
812# undef PNG_NO_HANDLE_AS_UNKNOWN
813# endif
75b6e0a0
GD		 814#endif
815#ifndef PNG_NO_READ_OPT_PLTE
4946a942
GD		 816# define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */
817#endif /* optional PLTE chunk in RGB and RGBA images */
818#if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \
819 defined(PNG_READ_zTXt_SUPPORTED)
820# define PNG_READ_TEXT_SUPPORTED
821# define PNG_TEXT_SUPPORTED
822#endif
823
75b6e0a0
GD		 824#endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */
825
826#ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
4946a942
GD		 827
828#ifdef PNG_NO_WRITE_TEXT
829# define PNG_NO_WRITE_iTXt
830# define PNG_NO_WRITE_tEXt
831# define PNG_NO_WRITE_zTXt
832#endif
75b6e0a0 833#ifndef PNG_NO_WRITE_bKGD
4946a942
GD		 834# define PNG_WRITE_bKGD_SUPPORTED
835# ifndef PNG_bKGD_SUPPORTED
836# define PNG_bKGD_SUPPORTED
837# endif
75b6e0a0
GD		 838#endif
839#ifndef PNG_NO_WRITE_cHRM
4946a942
GD		 840# define PNG_WRITE_cHRM_SUPPORTED
841# ifndef PNG_cHRM_SUPPORTED
842# define PNG_cHRM_SUPPORTED
843# endif
75b6e0a0
GD		 844#endif
845#ifndef PNG_NO_WRITE_gAMA
4946a942
GD		 846# define PNG_WRITE_gAMA_SUPPORTED
847# ifndef PNG_gAMA_SUPPORTED
848# define PNG_gAMA_SUPPORTED
849# endif
75b6e0a0
GD		 850#endif
851#ifndef PNG_NO_WRITE_hIST
4946a942
GD		 852# define PNG_WRITE_hIST_SUPPORTED
853# ifndef PNG_hIST_SUPPORTED
854# define PNG_hIST_SUPPORTED
855# endif
856#endif
857#ifndef PNG_NO_WRITE_iCCP
858# define PNG_WRITE_iCCP_SUPPORTED
859# ifndef PNG_iCCP_SUPPORTED
860# define PNG_iCCP_SUPPORTED
861# endif
862#endif
863#ifndef PNG_NO_WRITE_iTXt
864# ifndef PNG_WRITE_iTXt_SUPPORTED
865# define PNG_WRITE_iTXt_SUPPORTED
866# endif
867# ifndef PNG_iTXt_SUPPORTED
868# define PNG_iTXt_SUPPORTED
869# endif
75b6e0a0
GD		 870#endif
871#ifndef PNG_NO_WRITE_oFFs
4946a942
GD		 872# define PNG_WRITE_oFFs_SUPPORTED
873# ifndef PNG_oFFs_SUPPORTED
874# define PNG_oFFs_SUPPORTED
875# endif
75b6e0a0
GD		 876#endif
877#ifndef PNG_NO_WRITE_pCAL
4946a942
GD		 878# define PNG_WRITE_pCAL_SUPPORTED
879# ifndef PNG_pCAL_SUPPORTED
880# define PNG_pCAL_SUPPORTED
881# endif
882#endif
883#ifndef PNG_NO_WRITE_sCAL
884# define PNG_WRITE_sCAL_SUPPORTED
885# ifndef PNG_sCAL_SUPPORTED
886# define PNG_sCAL_SUPPORTED
887# endif
75b6e0a0
GD		 888#endif
889#ifndef PNG_NO_WRITE_pHYs
4946a942
GD		 890# define PNG_WRITE_pHYs_SUPPORTED
891# ifndef PNG_pHYs_SUPPORTED
892# define PNG_pHYs_SUPPORTED
893# endif
75b6e0a0
GD		 894#endif
895#ifndef PNG_NO_WRITE_sBIT
4946a942
GD		 896# define PNG_WRITE_sBIT_SUPPORTED
897# ifndef PNG_sBIT_SUPPORTED
898# define PNG_sBIT_SUPPORTED
899# endif
900#endif
901#ifndef PNG_NO_WRITE_sPLT
902# define PNG_WRITE_sPLT_SUPPORTED
903# ifndef PNG_sPLT_SUPPORTED
904# define PNG_sPLT_SUPPORTED
905# endif
75b6e0a0
GD		 906#endif
907#ifndef PNG_NO_WRITE_sRGB
4946a942
GD		 908# define PNG_WRITE_sRGB_SUPPORTED
909# ifndef PNG_sRGB_SUPPORTED
910# define PNG_sRGB_SUPPORTED
911# endif
75b6e0a0
GD		 912#endif
913#ifndef PNG_NO_WRITE_tEXt
4946a942
GD		 914# define PNG_WRITE_tEXt_SUPPORTED
915# ifndef PNG_tEXt_SUPPORTED
916# define PNG_tEXt_SUPPORTED
917# endif
75b6e0a0
GD		 918#endif
919#ifndef PNG_NO_WRITE_tIME
4946a942
GD		 920# define PNG_WRITE_tIME_SUPPORTED
921# ifndef PNG_tIME_SUPPORTED
922# define PNG_tIME_SUPPORTED
923# endif
75b6e0a0
GD		 924#endif
925#ifndef PNG_NO_WRITE_tRNS
4946a942
GD		 926# define PNG_WRITE_tRNS_SUPPORTED
927# ifndef PNG_tRNS_SUPPORTED
928# define PNG_tRNS_SUPPORTED
929# endif
75b6e0a0
GD		 930#endif
931#ifndef PNG_NO_WRITE_zTXt
4946a942
GD		 932# define PNG_WRITE_zTXt_SUPPORTED
933# ifndef PNG_zTXt_SUPPORTED
934# define PNG_zTXt_SUPPORTED
935# endif
75b6e0a0 936#endif
4946a942
GD		 937#ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS
938# define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
939# ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
940# define PNG_UNKNOWN_CHUNKS_SUPPORTED
941# endif
942# ifndef PNG_NO_HANDLE_AS_UNKNOWN
943# ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
944# define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
945# endif
946# endif
947#endif
948#if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
949 defined(PNG_WRITE_zTXt_SUPPORTED)
950# define PNG_WRITE_TEXT_SUPPORTED
951# ifndef PNG_TEXT_SUPPORTED
952# define PNG_TEXT_SUPPORTED
953# endif
954#endif
955
75b6e0a0
GD		 956#endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */
957
4946a942
GD		 958/* Turn this off to disable png_read_png() and
959 * png_write_png() and leave the row_pointers member
960 * out of the info structure.
961 */
962#ifndef PNG_NO_INFO_IMAGE
963# define PNG_INFO_IMAGE_SUPPORTED
964#endif
965
75b6e0a0 966/* need the time information for reading tIME chunks */
4946a942
GD		 967#if defined(PNG_tIME_SUPPORTED)
968# if !defined(_WIN32_WCE)
969 /* "time.h" functions are not supported on WindowsCE */
970# include <time.h>
971# endif
75b6e0a0
GD		 972#endif
973
974/* Some typedefs to get us started. These should be safe on most of the
975 * common platforms. The typedefs should be at least as large as the
976 * numbers suggest (a png_uint_32 must be at least 32 bits long), but they
977 * don't have to be exactly that size. Some compilers dislike passing
978 * unsigned shorts as function parameters, so you may be better off using
979 * unsigned int for png_uint_16. Likewise, for 64-bit systems, you may
980 * want to have unsigned int for png_uint_32 instead of unsigned long.
981 */
982
983typedef unsigned long png_uint_32;
984typedef long png_int_32;
985typedef unsigned short png_uint_16;
986typedef short png_int_16;
987typedef unsigned char png_byte;
988
989/* This is usually size_t. It is typedef'ed just in case you need it to
990 change (I'm not sure if you will or not, so I thought I'd be safe) */
991typedef size_t png_size_t;
992
993/* The following is needed for medium model support. It cannot be in the
994 * PNG_INTERNAL section. Needs modification for other compilers besides
995 * MSC. Model independent support declares all arrays and pointers to be
996 * large using the far keyword. The zlib version used must also support
997 * model independent data. As of version zlib 1.0.4, the necessary changes
998 * have been made in zlib. The USE_FAR_KEYWORD define triggers other
999 * changes that are needed. (Tim Wegner)
1000 */
1001
1002/* Separate compiler dependencies (problem here is that zlib.h always
1003 defines FAR. (SJT) */
1004#ifdef __BORLANDC__
4946a942
GD		 1005# if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)
1006# define LDATA 1
1007# else
1008# define LDATA 0
1009# endif
1010 /* GRR: why is Cygwin in here? Cygwin is not Borland C... */
1011# if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)
1012# define PNG_MAX_MALLOC_64K
1013# if (LDATA != 1)
1014# ifndef FAR
1015# define FAR __far
1016# endif
1017# define USE_FAR_KEYWORD
1018# endif /* LDATA != 1 */
1019 /* Possibly useful for moving data out of default segment.
1020 * Uncomment it if you want. Could also define FARDATA as
1021 * const if your compiler supports it. (SJT)
1022# define FARDATA FAR
1023 */
1024# endif /* __WIN32__, __FLAT__, __CYGWIN__ */
75b6e0a0
GD		 1025#endif /* __BORLANDC__ */
1026
1027
1028/* Suggest testing for specific compiler first before testing for
1029 * FAR. The Watcom compiler defines both __MEDIUM__ and M_I86MM,
1030 * making reliance oncertain keywords suspect. (SJT)
1031 */
1032
1033/* MSC Medium model */
1034#if defined(FAR)
1035# if defined(M_I86MM)
4946a942
GD		 1036# define USE_FAR_KEYWORD
1037# define FARDATA FAR
1038# include <dos.h>
75b6e0a0
GD		 1039# endif
1040#endif
1041
1042/* SJT: default case */
1043#ifndef FAR
4946a942 1044# define FAR
75b6e0a0
GD		 1045#endif
1046
1047/* At this point FAR is always defined */
1048#ifndef FARDATA
4946a942 1049# define FARDATA
75b6e0a0
GD		 1050#endif
1051
4946a942
GD		 1052/* Typedef for floating-point numbers that are converted
1053 to fixed-point with a multiple of 100,000, e.g., int_gamma */
1054typedef png_int_32 png_fixed_point;
1055
75b6e0a0
GD		 1056/* Add typedefs for pointers */
1057typedef void FAR * png_voidp;
1058typedef png_byte FAR * png_bytep;
1059typedef png_uint_32 FAR * png_uint_32p;
1060typedef png_int_32 FAR * png_int_32p;
1061typedef png_uint_16 FAR * png_uint_16p;
1062typedef png_int_16 FAR * png_int_16p;
1063typedef PNG_CONST char FAR * png_const_charp;
1064typedef char FAR * png_charp;
4946a942
GD		 1065typedef png_fixed_point FAR * png_fixed_point_p;
1066
1067#ifndef PNG_NO_STDIO
1068#if defined(_WIN32_WCE)
1069typedef HANDLE png_FILE_p;
1070#else
1071typedef FILE * png_FILE_p;
1072#endif
1073#endif
1074
1075#ifdef PNG_FLOATING_POINT_SUPPORTED
75b6e0a0 1076typedef double FAR * png_doublep;
4946a942 1077#endif
75b6e0a0
GD		 1078
1079/* Pointers to pointers; i.e. arrays */
1080typedef png_byte FAR * FAR * png_bytepp;
1081typedef png_uint_32 FAR * FAR * png_uint_32pp;
1082typedef png_int_32 FAR * FAR * png_int_32pp;
1083typedef png_uint_16 FAR * FAR * png_uint_16pp;
1084typedef png_int_16 FAR * FAR * png_int_16pp;
1085typedef PNG_CONST char FAR * FAR * png_const_charpp;
1086typedef char FAR * FAR * png_charpp;
4946a942
GD		 1087typedef png_fixed_point FAR * FAR * png_fixed_point_pp;
1088#ifdef PNG_FLOATING_POINT_SUPPORTED
75b6e0a0 1089typedef double FAR * FAR * png_doublepp;
4946a942 1090#endif
75b6e0a0 1091
4946a942 1092/* Pointers to pointers to pointers; i.e., pointer to array */
75b6e0a0
GD		 1093typedef char FAR * FAR * FAR * png_charppp;
1094
1095/* libpng typedefs for types in zlib. If zlib changes
1096 * or another compression library is used, then change these.
1097 * Eliminates need to change all the source files.
1098 */
1099typedef charf * png_zcharp;
1100typedef charf * FAR * png_zcharpp;
1101typedef z_stream FAR * png_zstreamp;
1102
4946a942
GD		 1103/*
1104 * Define PNG_BUILD_DLL if the module being built is a Windows
1105 * LIBPNG DLL.
1106 *
1107 * Define PNG_USE_DLL if you want to *link* to the Windows LIBPNG DLL.
1108 * It is equivalent to Microsoft predefined macro _DLL that is
1109 * automatically defined when you compile using the share
1110 * version of the CRT (C Run-Time library)
1111 *
1112 * The cygwin mods make this behavior a little different:
1113 * Define PNG_BUILD_DLL if you are building a dll for use with cygwin
1114 * Define PNG_STATIC if you are building a static library for use with cygwin,
1115 * -or- if you are building an application that you want to link to the
1116 * static library.
1117 * PNG_USE_DLL is defined by default (no user action needed) unless one of
1118 * the other flags is defined.
1119 */
1120
1121#if !defined(PNG_DLL) && (defined(PNG_BUILD_DLL) || defined(PNG_USE_DLL))
1122# define PNG_DLL
1123#endif
1124/* If CYGWIN, then disallow GLOBAL ARRAYS unless building a static lib.
1125 * When building a static lib, default to no GLOBAL ARRAYS, but allow
1126 * command-line override
1127 */
1128#if defined(__CYGWIN__)
1129# if !defined(PNG_STATIC)
1130# if defined(PNG_USE_GLOBAL_ARRAYS)
1131# undef PNG_USE_GLOBAL_ARRAYS
1132# endif
1133# if !defined(PNG_USE_LOCAL_ARRAYS)
1134# define PNG_USE_LOCAL_ARRAYS
1135# endif
1136# else
1137# if defined(PNG_USE_LOCAL_ARRAYS) || defined(PNG_NO_GLOBAL_ARRAYS)
1138# if defined(PNG_USE_GLOBAL_ARRAYS)
1139# undef PNG_USE_GLOBAL_ARRAYS
1140# endif
1141# endif
1142# endif
1143# if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1144# define PNG_USE_LOCAL_ARRAYS
1145# endif
75b6e0a0
GD		 1146#endif
1147
4946a942
GD		 1148/* Do not use global arrays (helps with building DLL's)
1149 * They are no longer used in libpng itself, since version 1.0.5c,
1150 * but might be required for some pre-1.0.5c applications.
1151 */
1152#if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1153# if defined(PNG_NO_GLOBAL_ARRAYS) || (defined(__GNUC__) && defined(PNG_DLL))
1154# define PNG_USE_LOCAL_ARRAYS
1155# else
1156# define PNG_USE_GLOBAL_ARRAYS
1157# endif
1158#endif
1159
5283098e 1160#if defined(__CYGWIN__) || defined(__WINE__)
4946a942 1161# undef PNGAPI
5283098e
JS		 1162# if defined(__WINE__)
1163# define PNGAPI
1164# else
1165# define PNGAPI __cdecl
1166# endif
4946a942
GD		 1167# undef PNG_IMPEXP
1168# define PNG_IMPEXP
77aecce0 1169#endif
4946a942
GD		 1170
1171/* If you define PNGAPI, e.g., with compiler option "-DPNGAPI=__stdcall",
1172 * you may get warnings regarding the linkage of png_zalloc and png_zfree.
1173 * Don't ignore those warnings; you must also reset the default calling
1174 * convention in your compiler to match your PNGAPI, and you must build
1175 * zlib and your applications the same way you build libpng.
1176 */
1177
1178#ifndef PNGAPI
1179
1180#if defined(__MINGW32__) && !defined(PNG_MODULEDEF)
1181# ifndef PNG_NO_MODULEDEF
1182# define PNG_NO_MODULEDEF
1183# endif
75b6e0a0
GD		 1184#endif
1185
4946a942
GD		 1186#if !defined(PNG_IMPEXP) && defined(PNG_BUILD_DLL) && !defined(PNG_NO_MODULEDEF)
1187# define PNG_IMPEXP
1188#endif
1189
1190#if defined(PNG_DLL) || defined(_DLL) || defined(__DLL__ ) || \
1191 (( defined(_Windows) || defined(_WINDOWS) || \
1192 defined(WIN32) || defined(_WIN32) || defined(__WIN32__) ))
1193
1194# if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
1195# define PNGAPI __cdecl
1196# else
1197# define PNGAPI _cdecl
1198# endif
1199
1200# if !defined(PNG_IMPEXP) && (!defined(PNG_DLL) || \
1201 0 /* WINCOMPILER_WITH_NO_SUPPORT_FOR_DECLIMPEXP */)
1202# define PNG_IMPEXP
1203# endif
1204
1205# if !defined(PNG_IMPEXP)
1206
1207# define PNG_EXPORT_TYPE1(type,symbol) PNG_IMPEXP type PNGAPI symbol
1208# define PNG_EXPORT_TYPE2(type,symbol) type PNG_IMPEXP PNGAPI symbol
1209
1210 /* Borland/Microsoft */
1211# if defined(_MSC_VER) || defined(__BORLANDC__)
1212# if (_MSC_VER >= 800) || (__BORLANDC__ >= 0x500)
1213# define PNG_EXPORT PNG_EXPORT_TYPE1
1214# else
1215# define PNG_EXPORT PNG_EXPORT_TYPE2
1216# if defined(PNG_BUILD_DLL)
1217# define PNG_IMPEXP __export
1218# else
1219# define PNG_IMPEXP /*__import */ /* doesn't exist AFAIK in
1220 VC++ */
1221# endif /* Exists in Borland C++ for
1222 C++ classes (== huge) */
1223# endif
1224# endif
1225
1226# if !defined(PNG_IMPEXP)
1227# if defined(PNG_BUILD_DLL)
1228# define PNG_IMPEXP __declspec(dllexport)
1229# else
1230# define PNG_IMPEXP __declspec(dllimport)
1231# endif
1232# endif
1233# endif /* PNG_IMPEXP */
1234#else /* !(DLL || non-cygwin WINDOWS) */
2b5f62a0 1235# if (defined(__IBMC__) || defined(IBMCPP__)) && defined(__OS2__)
4946a942
GD		 1236# define PNGAPI _System
1237# define PNG_IMPEXP
1238# else
1239# if 0 /* ... other platforms, with other meanings */
1240# else
1241# define PNGAPI
1242# define PNG_IMPEXP
1243# endif
1244# endif
1245#endif
1246#endif
1247
77aecce0 1248#if defined(__VISAGECPP__)
77ffb593 1249/* I don't compile with this _System linkage for wxWidgets */
77aecce0
DW		 1250# ifdef PNGAPI
1251# undef PNGAPI
1252# endif
1253# define PNGAPI _Optlink
1254# define PNG_IMPEXP
1255# define PNG_USE_LOCAL_ARRAYS
1256# ifdef PNG_USE_GLOBAL_ARRAYS
1257# undef PNG_USE_GLOBAL_ARRAYS
1258# endif
1259extern const char png_libpng_ver[18];
1260#endif
1261
4946a942
GD		 1262#ifndef PNGAPI
1263# define PNGAPI
1264#endif
1265#ifndef PNG_IMPEXP
1266# define PNG_IMPEXP
75b6e0a0
GD		 1267#endif
1268
1269#ifndef PNG_EXPORT
4946a942 1270# define PNG_EXPORT(type,symbol) PNG_IMPEXP type PNGAPI symbol
75b6e0a0
GD		 1271#endif
1272
4946a942
GD		 1273#ifdef PNG_USE_GLOBAL_ARRAYS
1274# ifndef PNG_EXPORT_VAR
1275# define PNG_EXPORT_VAR(type) extern PNG_IMPEXP type
1276# endif
1277#endif
75b6e0a0 1278
4946a942
GD		 1279/* User may want to use these so they are not in PNG_INTERNAL. Any library
1280 * functions that are passed far data must be model independent.
75b6e0a0
GD		 1281 */
1282
4946a942
GD		 1283#ifndef PNG_ABORT
1284# define PNG_ABORT() abort()
1285#endif
1286
1287#ifdef PNG_SETJMP_SUPPORTED
1288# define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf)
1289#else
1290# define png_jmpbuf(png_ptr) \
1291 (LIBPNG_WAS_COMPILED_WITH__PNG_SETJMP_NOT_SUPPORTED)
1292#endif
1293
75b6e0a0
GD		 1294#if defined(USE_FAR_KEYWORD) /* memory model independent fns */
1295/* use this to make far-to-near assignments */
4946a942
GD		 1296# define CHECK 1
1297# define NOCHECK 0
1298# define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK))
1299# define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK))
1300# define png_strcpy _fstrcpy
1301# define png_strlen _fstrlen
1302# define png_memcmp _fmemcmp /* SJT: added */
1303# define png_memcpy _fmemcpy
1304# define png_memset _fmemset
75b6e0a0 1305#else /* use the usual functions */
4946a942
GD		 1306# define CVT_PTR(ptr) (ptr)
1307# define CVT_PTR_NOCHECK(ptr) (ptr)
1308# define png_strcpy strcpy
1309# define png_strlen strlen
1310# define png_memcmp memcmp /* SJT: added */
1311# define png_memcpy memcpy
1312# define png_memset memset
75b6e0a0
GD		 1313#endif
1314/* End of memory model independent support */
1315
4946a942 1316/* Just a little check that someone hasn't tried to define something
75b6e0a0
GD		 1317 * contradictory.
1318 */
1319#if (PNG_ZBUF_SIZE > 65536) && defined(PNG_MAX_MALLOC_64K)
4946a942
GD		 1320# undef PNG_ZBUF_SIZE
1321# define PNG_ZBUF_SIZE 65536
1322#endif
1323
1324#ifdef PNG_READ_SUPPORTED
1325/* Prior to libpng-1.0.9, this block was in pngasmrd.h */
1326#if defined(PNG_INTERNAL)
1327
1328/* These are the default thresholds before the MMX code kicks in; if either
1329 * rowbytes or bitdepth is below the threshold, plain C code is used. These
1330 * can be overridden at runtime via the png_set_mmx_thresholds() call in
1331 * libpng 1.2.0 and later. The values below were chosen by Intel.
1332 */
1333
1334#ifndef PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT
1335# define PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT 128 /* >= */
1336#endif
1337#ifndef PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT
77aecce0 1338# define PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT 9 /* >= */
75b6e0a0
GD		 1339#endif
1340
4946a942
GD		 1341/* Set this in the makefile for VC++ on Pentium, not here. */
1342/* Platform must be Pentium. Makefile must assemble and load pngvcrd.c .
1343 * MMX will be detected at run time and used if present.
1344 */
1345#ifdef PNG_USE_PNGVCRD
1346# define PNG_HAVE_ASSEMBLER_COMBINE_ROW
1347# define PNG_HAVE_ASSEMBLER_READ_INTERLACE
1348# define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
1349#endif
1350
1351/* Set this in the makefile for gcc/as on Pentium, not here. */
1352/* Platform must be Pentium. Makefile must assemble and load pnggccrd.c .
1353 * MMX will be detected at run time and used if present.
1354 */
1355#ifdef PNG_USE_PNGGCCRD
1356# define PNG_HAVE_ASSEMBLER_COMBINE_ROW
1357# define PNG_HAVE_ASSEMBLER_READ_INTERLACE
1358# define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
1359#endif
1360/* - see pnggccrd.c for info about what is currently enabled */
1361
1362#endif /* PNG_INTERNAL */
1363#endif /* PNG_READ_SUPPORTED */
1364
75b6e0a0
GD		 1365#endif /* PNGCONF_H */
1366
wxWidgets (Impactor)