Angband
pngconf.h
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1 
2 /* pngconf.h - machine configurable file for libpng
3  *
4  * libpng version 1.2.37 - June 4, 2009
5  * For conditions of distribution and use, see copyright notice in png.h
6  * Copyright (c) 1998-2009 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 # ifndef PNG_USER_PRIVATEBUILD
28 # define PNG_USER_PRIVATEBUILD
29 # endif
30 #include "pngusr.h"
31 #endif
32 
33 /* PNG_CONFIGURE_LIBPNG is set by the "configure" script. */
34 #ifdef PNG_CONFIGURE_LIBPNG
35 #ifdef HAVE_CONFIG_H
36 #include "config.h"
37 #endif
38 #endif
39 
40 /*
41  * Added at libpng-1.2.8
42  *
43  * If you create a private DLL you need to define in "pngusr.h" the followings:
44  * #define PNG_USER_PRIVATEBUILD <Describes by whom and why this version of
45  * the DLL was built>
46  * e.g. #define PNG_USER_PRIVATEBUILD "Build by MyCompany for xyz reasons."
47  * #define PNG_USER_DLLFNAME_POSTFIX <two-letter postfix that serve to
48  * distinguish your DLL from those of the official release. These
49  * correspond to the trailing letters that come after the version
50  * number and must match your private DLL name>
51  * e.g. // private DLL "libpng13gx.dll"
52  * #define PNG_USER_DLLFNAME_POSTFIX "gx"
53  *
54  * The following macros are also at your disposal if you want to complete the
55  * DLL VERSIONINFO structure.
56  * - PNG_USER_VERSIONINFO_COMMENTS
57  * - PNG_USER_VERSIONINFO_COMPANYNAME
58  * - PNG_USER_VERSIONINFO_LEGALTRADEMARKS
59  */
60 
61 #ifdef __STDC__
62 #ifdef SPECIALBUILD
63 # pragma message("PNG_LIBPNG_SPECIALBUILD (and deprecated SPECIALBUILD)\
64  are now LIBPNG reserved macros. Use PNG_USER_PRIVATEBUILD instead.")
65 #endif
66 
67 #ifdef PRIVATEBUILD
68 # pragma message("PRIVATEBUILD is deprecated.\
69  Use PNG_USER_PRIVATEBUILD instead.")
70 # define PNG_USER_PRIVATEBUILD PRIVATEBUILD
71 #endif
72 #endif /* __STDC__ */
73 
74 #ifndef PNG_VERSION_INFO_ONLY
75 
76 /* End of material added to libpng-1.2.8 */
77 
78 /* Added at libpng-1.2.19, removed at libpng-1.2.20 because it caused trouble
79  Restored at libpng-1.2.21 */
80 #if !defined(PNG_NO_WARN_UNINITIALIZED_ROW) && \
81  !defined(PNG_WARN_UNINITIALIZED_ROW)
82 # define PNG_WARN_UNINITIALIZED_ROW 1
83 #endif
84 /* End of material added at libpng-1.2.19/1.2.21 */
85 
86 /* This is the size of the compression buffer, and thus the size of
87  * an IDAT chunk. Make this whatever size you feel is best for your
88  * machine. One of these will be allocated per png_struct. When this
89  * is full, it writes the data to the disk, and does some other
90  * calculations. Making this an extremely small size will slow
91  * the library down, but you may want to experiment to determine
92  * where it becomes significant, if you are concerned with memory
93  * usage. Note that zlib allocates at least 32Kb also. For readers,
94  * this describes the size of the buffer available to read the data in.
95  * Unless this gets smaller than the size of a row (compressed),
96  * it should not make much difference how big this is.
97  */
98 
99 #ifndef PNG_ZBUF_SIZE
100 # define PNG_ZBUF_SIZE 8192
101 #endif
102 
103 /* Enable if you want a write-only libpng */
104 
105 #ifndef PNG_NO_READ_SUPPORTED
106 # define PNG_READ_SUPPORTED
107 #endif
108 
109 /* Enable if you want a read-only libpng */
110 
111 #ifndef PNG_NO_WRITE_SUPPORTED
112 # define PNG_WRITE_SUPPORTED
113 #endif
114 
115 /* Enabled by default in 1.2.0. You can disable this if you don't need to
116  support PNGs that are embedded in MNG datastreams */
117 #if !defined(PNG_1_0_X) && !defined(PNG_NO_MNG_FEATURES)
118 # ifndef PNG_MNG_FEATURES_SUPPORTED
119 # define PNG_MNG_FEATURES_SUPPORTED
120 # endif
121 #endif
122 
123 #ifndef PNG_NO_FLOATING_POINT_SUPPORTED
124 # ifndef PNG_FLOATING_POINT_SUPPORTED
125 # define PNG_FLOATING_POINT_SUPPORTED
126 # endif
127 #endif
128 
129 /* If you are running on a machine where you cannot allocate more
130  * than 64K of memory at once, uncomment this. While libpng will not
131  * normally need that much memory in a chunk (unless you load up a very
132  * large file), zlib needs to know how big of a chunk it can use, and
133  * libpng thus makes sure to check any memory allocation to verify it
134  * will fit into memory.
135 #define PNG_MAX_MALLOC_64K
136  */
137 #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
138 # define PNG_MAX_MALLOC_64K
139 #endif
140 
141 /* Special munging to support doing things the 'cygwin' way:
142  * 'Normal' png-on-win32 defines/defaults:
143  * PNG_BUILD_DLL -- building dll
144  * PNG_USE_DLL -- building an application, linking to dll
145  * (no define) -- building static library, or building an
146  * application and linking to the static lib
147  * 'Cygwin' defines/defaults:
148  * PNG_BUILD_DLL -- (ignored) building the dll
149  * (no define) -- (ignored) building an application, linking to the dll
150  * PNG_STATIC -- (ignored) building the static lib, or building an
151  * application that links to the static lib.
152  * ALL_STATIC -- (ignored) building various static libs, or building an
153  * application that links to the static libs.
154  * Thus,
155  * a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and
156  * this bit of #ifdefs will define the 'correct' config variables based on
157  * that. If a cygwin user *wants* to define 'PNG_USE_DLL' that's okay, but
158  * unnecessary.
159  *
160  * Also, the precedence order is:
161  * ALL_STATIC (since we can't #undef something outside our namespace)
162  * PNG_BUILD_DLL
163  * PNG_STATIC
164  * (nothing) == PNG_USE_DLL
165  *
166  * CYGWIN (2002-01-20): The preceding is now obsolete. With the advent
167  * of auto-import in binutils, we no longer need to worry about
168  * __declspec(dllexport) / __declspec(dllimport) and friends. Therefore,
169  * we don't need to worry about PNG_STATIC or ALL_STATIC when it comes
170  * to __declspec() stuff. However, we DO need to worry about
171  * PNG_BUILD_DLL and PNG_STATIC because those change some defaults
172  * such as CONSOLE_IO and whether GLOBAL_ARRAYS are allowed.
173  */
174 #if defined(__CYGWIN__)
175 # if defined(ALL_STATIC)
176 # if defined(PNG_BUILD_DLL)
177 # undef PNG_BUILD_DLL
178 # endif
179 # if defined(PNG_USE_DLL)
180 # undef PNG_USE_DLL
181 # endif
182 # if defined(PNG_DLL)
183 # undef PNG_DLL
184 # endif
185 # if !defined(PNG_STATIC)
186 # define PNG_STATIC
187 # endif
188 # else
189 # if defined (PNG_BUILD_DLL)
190 # if defined(PNG_STATIC)
191 # undef PNG_STATIC
192 # endif
193 # if defined(PNG_USE_DLL)
194 # undef PNG_USE_DLL
195 # endif
196 # if !defined(PNG_DLL)
197 # define PNG_DLL
198 # endif
199 # else
200 # if defined(PNG_STATIC)
201 # if defined(PNG_USE_DLL)
202 # undef PNG_USE_DLL
203 # endif
204 # if defined(PNG_DLL)
205 # undef PNG_DLL
206 # endif
207 # else
208 # if !defined(PNG_USE_DLL)
209 # define PNG_USE_DLL
210 # endif
211 # if !defined(PNG_DLL)
212 # define PNG_DLL
213 # endif
214 # endif
215 # endif
216 # endif
217 #endif
218 
219 /* This protects us against compilers that run on a windowing system
220  * and thus don't have or would rather us not use the stdio types:
221  * stdin, stdout, and stderr. The only one currently used is stderr
222  * in png_error() and png_warning(). #defining PNG_NO_CONSOLE_IO will
223  * prevent these from being compiled and used. #defining PNG_NO_STDIO
224  * will also prevent these, plus will prevent the entire set of stdio
225  * macros and functions (FILE *, printf, etc.) from being compiled and used,
226  * unless (PNG_DEBUG > 0) has been #defined.
227  *
228  * #define PNG_NO_CONSOLE_IO
229  * #define PNG_NO_STDIO
230  */
231 
232 #if defined(_WIN32_WCE)
233 # include <windows.h>
234  /* Console I/O functions are not supported on WindowsCE */
235 # define PNG_NO_CONSOLE_IO
236  /* abort() may not be supported on some/all Windows CE platforms */
237 # define PNG_ABORT() exit(-1)
238 # ifdef PNG_DEBUG
239 # undef PNG_DEBUG
240 # endif
241 #endif
242 
243 #ifdef PNG_BUILD_DLL
244 # ifndef PNG_CONSOLE_IO_SUPPORTED
245 # ifndef PNG_NO_CONSOLE_IO
246 # define PNG_NO_CONSOLE_IO
247 # endif
248 # endif
249 #endif
250 
251 # ifdef PNG_NO_STDIO
252 # ifndef PNG_NO_CONSOLE_IO
253 # define PNG_NO_CONSOLE_IO
254 # endif
255 # ifdef PNG_DEBUG
256 # if (PNG_DEBUG > 0)
257 # include <stdio.h>
258 # endif
259 # endif
260 # else
261 # if !defined(_WIN32_WCE)
262 /* "stdio.h" functions are not supported on WindowsCE */
263 # include <stdio.h>
264 # endif
265 # endif
266 
267 /* This macro protects us against machines that don't have function
268  * prototypes (ie K&R style headers). If your compiler does not handle
269  * function prototypes, define this macro and use the included ansi2knr.
270  * I've always been able to use _NO_PROTO as the indicator, but you may
271  * need to drag the empty declaration out in front of here, or change the
272  * ifdef to suit your own needs.
273  */
274 #ifndef PNGARG
275 
276 #ifdef OF /* zlib prototype munger */
277 # define PNGARG(arglist) OF(arglist)
278 #else
279 
280 #ifdef _NO_PROTO
281 # define PNGARG(arglist) ()
282 # ifndef PNG_TYPECAST_NULL
283 # define PNG_TYPECAST_NULL
284 # endif
285 #else
286 # define PNGARG(arglist) arglist
287 #endif /* _NO_PROTO */
288 
289 
290 #endif /* OF */
291 
292 #endif /* PNGARG */
293 
294 /* Try to determine if we are compiling on a Mac. Note that testing for
295  * just __MWERKS__ is not good enough, because the Codewarrior is now used
296  * on non-Mac platforms.
297  */
298 #ifndef MACOS
299 # if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
300  defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC)
301 # define MACOS
302 # endif
303 #endif
304 
305 /* enough people need this for various reasons to include it here */
306 #if !defined(MACOS) && !defined(RISCOS) && !defined(_WIN32_WCE)
307 # include <sys/types.h>
308 #endif
309 
310 #if !defined(PNG_SETJMP_NOT_SUPPORTED) && !defined(PNG_NO_SETJMP_SUPPORTED)
311 # define PNG_SETJMP_SUPPORTED
312 #endif
313 
314 #ifdef PNG_SETJMP_SUPPORTED
315 /* This is an attempt to force a single setjmp behaviour on Linux. If
316  * the X config stuff didn't define _BSD_SOURCE we wouldn't need this.
317  *
318  * You can bypass this test if you know that your application uses exactly
319  * the same setjmp.h that was included when libpng was built. Only define
320  * PNG_SKIP_SETJMP_CHECK while building your application, prior to the
321  * application's '#include "png.h"'. Don't define PNG_SKIP_SETJMP_CHECK
322  * while building a separate libpng library for general use.
323  */
324 
325 # ifndef PNG_SKIP_SETJMP_CHECK
326 # ifdef __linux__
327 # ifdef _BSD_SOURCE
328 # define PNG_SAVE_BSD_SOURCE
329 # undef _BSD_SOURCE
330 # endif
331 # ifdef _SETJMP_H
332  /* If you encounter a compiler error here, see the explanation
333  * near the end of INSTALL.
334  */
335  __pngconf.h__ in libpng already includes setjmp.h;
336  __dont__ include it again.;
337 # endif
338 # endif /* __linux__ */
339 # endif /* PNG_SKIP_SETJMP_CHECK */
340 
341  /* include setjmp.h for error handling */
342 # include <setjmp.h>
343 
344 # ifdef __linux__
345 # ifdef PNG_SAVE_BSD_SOURCE
346 # ifndef _BSD_SOURCE
347 # define _BSD_SOURCE
348 # endif
349 # undef PNG_SAVE_BSD_SOURCE
350 # endif
351 # endif /* __linux__ */
352 #endif /* PNG_SETJMP_SUPPORTED */
353 
354 #ifdef BSD
355 # include <strings.h>
356 #else
357 # include <string.h>
358 #endif
359 
360 /* Other defines for things like memory and the like can go here. */
361 #ifdef PNG_INTERNAL
362 
363 #include <stdlib.h>
364 
365 /* The functions exported by PNG_EXTERN are PNG_INTERNAL functions, which
366  * aren't usually used outside the library (as far as I know), so it is
367  * debatable if they should be exported at all. In the future, when it is
368  * possible to have run-time registry of chunk-handling functions, some of
369  * these will be made available again.
370 #define PNG_EXTERN extern
371  */
372 #define PNG_EXTERN
373 
374 /* Other defines specific to compilers can go here. Try to keep
375  * them inside an appropriate ifdef/endif pair for portability.
376  */
377 
378 #if defined(PNG_FLOATING_POINT_SUPPORTED)
379 # if defined(MACOS)
380  /* We need to check that <math.h> hasn't already been included earlier
381  * as it seems it doesn't agree with <fp.h>, yet we should really use
382  * <fp.h> if possible.
383  */
384 # if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__)
385 # include <fp.h>
386 # endif
387 # else
388 # include <math.h>
389 # endif
390 # if defined(_AMIGA) && defined(__SASC) && defined(_M68881)
391  /* Amiga SAS/C: We must include builtin FPU functions when compiling using
392  * MATH=68881
393  */
394 # include <m68881.h>
395 # endif
396 #endif
397 
398 /* Codewarrior on NT has linking problems without this. */
399 #if (defined(__MWERKS__) && defined(WIN32)) || defined(__STDC__)
400 # define PNG_ALWAYS_EXTERN
401 #endif
402 
403 /* This provides the non-ANSI (far) memory allocation routines. */
404 #if defined(__TURBOC__) && defined(__MSDOS__)
405 # include <mem.h>
406 # include <alloc.h>
407 #endif
408 
409 /* I have no idea why is this necessary... */
410 #if defined(_MSC_VER) && (defined(WIN32) || defined(_Windows) || \
411  defined(_WINDOWS) || defined(_WIN32) || defined(__WIN32__))
412 # include <malloc.h>
413 #endif
414 
415 /* This controls how fine the dithering gets. As this allocates
416  * a largish chunk of memory (32K), those who are not as concerned
417  * with dithering quality can decrease some or all of these.
418  */
419 #ifndef PNG_DITHER_RED_BITS
420 # define PNG_DITHER_RED_BITS 5
421 #endif
422 #ifndef PNG_DITHER_GREEN_BITS
423 # define PNG_DITHER_GREEN_BITS 5
424 #endif
425 #ifndef PNG_DITHER_BLUE_BITS
426 # define PNG_DITHER_BLUE_BITS 5
427 #endif
428 
429 /* This controls how fine the gamma correction becomes when you
430  * are only interested in 8 bits anyway. Increasing this value
431  * results in more memory being used, and more pow() functions
432  * being called to fill in the gamma tables. Don't set this value
433  * less then 8, and even that may not work (I haven't tested it).
434  */
435 
436 #ifndef PNG_MAX_GAMMA_8
437 # define PNG_MAX_GAMMA_8 11
438 #endif
439 
440 /* This controls how much a difference in gamma we can tolerate before
441  * we actually start doing gamma conversion.
442  */
443 #ifndef PNG_GAMMA_THRESHOLD
444 # define PNG_GAMMA_THRESHOLD 0.05
445 #endif
446 
447 #endif /* PNG_INTERNAL */
448 
449 /* The following uses const char * instead of char * for error
450  * and warning message functions, so some compilers won't complain.
451  * If you do not want to use const, define PNG_NO_CONST here.
452  */
453 
454 #ifndef PNG_NO_CONST
455 # define PNG_CONST const
456 #else
457 # define PNG_CONST
458 #endif
459 
460 /* The following defines give you the ability to remove code from the
461  * library that you will not be using. I wish I could figure out how to
462  * automate this, but I can't do that without making it seriously hard
463  * on the users. So if you are not using an ability, change the #define
464  * to and #undef, and that part of the library will not be compiled. If
465  * your linker can't find a function, you may want to make sure the
466  * ability is defined here. Some of these depend upon some others being
467  * defined. I haven't figured out all the interactions here, so you may
468  * have to experiment awhile to get everything to compile. If you are
469  * creating or using a shared library, you probably shouldn't touch this,
470  * as it will affect the size of the structures, and this will cause bad
471  * things to happen if the library and/or application ever change.
472  */
473 
474 /* Any features you will not be using can be undef'ed here */
475 
476 /* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user
477  * to turn it off with "*TRANSFORMS_NOT_SUPPORTED" or *PNG_NO_*_TRANSFORMS
478  * on the compile line, then pick and choose which ones to define without
479  * having to edit this file. It is safe to use the *TRANSFORMS_NOT_SUPPORTED
480  * if you only want to have a png-compliant reader/writer but don't need
481  * any of the extra transformations. This saves about 80 kbytes in a
482  * typical installation of the library. (PNG_NO_* form added in version
483  * 1.0.1c, for consistency)
484  */
485 
486 /* The size of the png_text structure changed in libpng-1.0.6 when
487  * iTXt support was added. iTXt support was turned off by default through
488  * libpng-1.2.x, to support old apps that malloc the png_text structure
489  * instead of calling png_set_text() and letting libpng malloc it. It
490  * was turned on by default in libpng-1.3.0.
491  */
492 
493 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
494 # ifndef PNG_NO_iTXt_SUPPORTED
495 # define PNG_NO_iTXt_SUPPORTED
496 # endif
497 # ifndef PNG_NO_READ_iTXt
498 # define PNG_NO_READ_iTXt
499 # endif
500 # ifndef PNG_NO_WRITE_iTXt
501 # define PNG_NO_WRITE_iTXt
502 # endif
503 #endif
504 
505 #if !defined(PNG_NO_iTXt_SUPPORTED)
506 # if !defined(PNG_READ_iTXt_SUPPORTED) && !defined(PNG_NO_READ_iTXt)
507 # define PNG_READ_iTXt
508 # endif
509 # if !defined(PNG_WRITE_iTXt_SUPPORTED) && !defined(PNG_NO_WRITE_iTXt)
510 # define PNG_WRITE_iTXt
511 # endif
512 #endif
513 
514 /* The following support, added after version 1.0.0, can be turned off here en
515  * masse by defining PNG_LEGACY_SUPPORTED in case you need binary compatibility
516  * with old applications that require the length of png_struct and png_info
517  * to remain unchanged.
518  */
519 
520 #ifdef PNG_LEGACY_SUPPORTED
521 # define PNG_NO_FREE_ME
522 # define PNG_NO_READ_UNKNOWN_CHUNKS
523 # define PNG_NO_WRITE_UNKNOWN_CHUNKS
524 # define PNG_NO_READ_USER_CHUNKS
525 # define PNG_NO_READ_iCCP
526 # define PNG_NO_WRITE_iCCP
527 # define PNG_NO_READ_iTXt
528 # define PNG_NO_WRITE_iTXt
529 # define PNG_NO_READ_sCAL
530 # define PNG_NO_WRITE_sCAL
531 # define PNG_NO_READ_sPLT
532 # define PNG_NO_WRITE_sPLT
533 # define PNG_NO_INFO_IMAGE
534 # define PNG_NO_READ_RGB_TO_GRAY
535 # define PNG_NO_READ_USER_TRANSFORM
536 # define PNG_NO_WRITE_USER_TRANSFORM
537 # define PNG_NO_USER_MEM
538 # define PNG_NO_READ_EMPTY_PLTE
539 # define PNG_NO_MNG_FEATURES
540 # define PNG_NO_FIXED_POINT_SUPPORTED
541 #endif
542 
543 /* Ignore attempt to turn off both floating and fixed point support */
544 #if !defined(PNG_FLOATING_POINT_SUPPORTED) || \
545  !defined(PNG_NO_FIXED_POINT_SUPPORTED)
546 # define PNG_FIXED_POINT_SUPPORTED
547 #endif
548 
549 #ifndef PNG_NO_FREE_ME
550 # define PNG_FREE_ME_SUPPORTED
551 #endif
552 
553 #if defined(PNG_READ_SUPPORTED)
554 
555 #if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \
556  !defined(PNG_NO_READ_TRANSFORMS)
557 # define PNG_READ_TRANSFORMS_SUPPORTED
558 #endif
559 
560 #ifdef PNG_READ_TRANSFORMS_SUPPORTED
561 # ifndef PNG_NO_READ_EXPAND
562 # define PNG_READ_EXPAND_SUPPORTED
563 # endif
564 # ifndef PNG_NO_READ_SHIFT
565 # define PNG_READ_SHIFT_SUPPORTED
566 # endif
567 # ifndef PNG_NO_READ_PACK
568 # define PNG_READ_PACK_SUPPORTED
569 # endif
570 # ifndef PNG_NO_READ_BGR
571 # define PNG_READ_BGR_SUPPORTED
572 # endif
573 # ifndef PNG_NO_READ_SWAP
574 # define PNG_READ_SWAP_SUPPORTED
575 # endif
576 # ifndef PNG_NO_READ_PACKSWAP
577 # define PNG_READ_PACKSWAP_SUPPORTED
578 # endif
579 # ifndef PNG_NO_READ_INVERT
580 # define PNG_READ_INVERT_SUPPORTED
581 # endif
582 # ifndef PNG_NO_READ_DITHER
583 # define PNG_READ_DITHER_SUPPORTED
584 # endif
585 # ifndef PNG_NO_READ_BACKGROUND
586 # define PNG_READ_BACKGROUND_SUPPORTED
587 # endif
588 # ifndef PNG_NO_READ_16_TO_8
589 # define PNG_READ_16_TO_8_SUPPORTED
590 # endif
591 # ifndef PNG_NO_READ_FILLER
592 # define PNG_READ_FILLER_SUPPORTED
593 # endif
594 # ifndef PNG_NO_READ_GAMMA
595 # define PNG_READ_GAMMA_SUPPORTED
596 # endif
597 # ifndef PNG_NO_READ_GRAY_TO_RGB
598 # define PNG_READ_GRAY_TO_RGB_SUPPORTED
599 # endif
600 # ifndef PNG_NO_READ_SWAP_ALPHA
601 # define PNG_READ_SWAP_ALPHA_SUPPORTED
602 # endif
603 # ifndef PNG_NO_READ_INVERT_ALPHA
604 # define PNG_READ_INVERT_ALPHA_SUPPORTED
605 # endif
606 # ifndef PNG_NO_READ_STRIP_ALPHA
607 # define PNG_READ_STRIP_ALPHA_SUPPORTED
608 # endif
609 # ifndef PNG_NO_READ_USER_TRANSFORM
610 # define PNG_READ_USER_TRANSFORM_SUPPORTED
611 # endif
612 # ifndef PNG_NO_READ_RGB_TO_GRAY
613 # define PNG_READ_RGB_TO_GRAY_SUPPORTED
614 # endif
615 #endif /* PNG_READ_TRANSFORMS_SUPPORTED */
616 
617 #if !defined(PNG_NO_PROGRESSIVE_READ) && \
618  !defined(PNG_PROGRESSIVE_READ_SUPPORTED) /* if you don't do progressive */
619 # define PNG_PROGRESSIVE_READ_SUPPORTED /* reading. This is not talking */
620 #endif /* about interlacing capability! You'll */
621  /* still have interlacing unless you change the following line: */
622 
623 #define PNG_READ_INTERLACING_SUPPORTED /* required in PNG-compliant decoders */
624 
625 #ifndef PNG_NO_READ_COMPOSITE_NODIV
626 # ifndef PNG_NO_READ_COMPOSITED_NODIV /* libpng-1.0.x misspelling */
627 # define PNG_READ_COMPOSITE_NODIV_SUPPORTED /* well tested on Intel, SGI */
628 # endif
629 #endif
630 
631 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
632 /* Deprecated, will be removed from version 2.0.0.
633  Use PNG_MNG_FEATURES_SUPPORTED instead. */
634 #ifndef PNG_NO_READ_EMPTY_PLTE
635 # define PNG_READ_EMPTY_PLTE_SUPPORTED
636 #endif
637 #endif
638 
639 #endif /* PNG_READ_SUPPORTED */
640 
641 #if defined(PNG_WRITE_SUPPORTED)
642 
643 # if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \
644  !defined(PNG_NO_WRITE_TRANSFORMS)
645 # define PNG_WRITE_TRANSFORMS_SUPPORTED
646 #endif
647 
648 #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
649 # ifndef PNG_NO_WRITE_SHIFT
650 # define PNG_WRITE_SHIFT_SUPPORTED
651 # endif
652 # ifndef PNG_NO_WRITE_PACK
653 # define PNG_WRITE_PACK_SUPPORTED
654 # endif
655 # ifndef PNG_NO_WRITE_BGR
656 # define PNG_WRITE_BGR_SUPPORTED
657 # endif
658 # ifndef PNG_NO_WRITE_SWAP
659 # define PNG_WRITE_SWAP_SUPPORTED
660 # endif
661 # ifndef PNG_NO_WRITE_PACKSWAP
662 # define PNG_WRITE_PACKSWAP_SUPPORTED
663 # endif
664 # ifndef PNG_NO_WRITE_INVERT
665 # define PNG_WRITE_INVERT_SUPPORTED
666 # endif
667 # ifndef PNG_NO_WRITE_FILLER
668 # define PNG_WRITE_FILLER_SUPPORTED /* same as WRITE_STRIP_ALPHA */
669 # endif
670 # ifndef PNG_NO_WRITE_SWAP_ALPHA
671 # define PNG_WRITE_SWAP_ALPHA_SUPPORTED
672 # endif
673 # ifndef PNG_NO_WRITE_INVERT_ALPHA
674 # define PNG_WRITE_INVERT_ALPHA_SUPPORTED
675 # endif
676 # ifndef PNG_NO_WRITE_USER_TRANSFORM
677 # define PNG_WRITE_USER_TRANSFORM_SUPPORTED
678 # endif
679 #endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */
680 
681 #if !defined(PNG_NO_WRITE_INTERLACING_SUPPORTED) && \
682  !defined(PNG_WRITE_INTERLACING_SUPPORTED)
683 #define PNG_WRITE_INTERLACING_SUPPORTED /* not required for PNG-compliant
684  encoders, but can cause trouble
685  if left undefined */
686 #endif
687 
688 #if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \
689  !defined(PNG_WRITE_WEIGHTED_FILTER) && \
690  defined(PNG_FLOATING_POINT_SUPPORTED)
691 # define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
692 #endif
694 #ifndef PNG_NO_WRITE_FLUSH
695 # define PNG_WRITE_FLUSH_SUPPORTED
696 #endif
697 
698 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
699 /* Deprecated, see PNG_MNG_FEATURES_SUPPORTED, above */
700 #ifndef PNG_NO_WRITE_EMPTY_PLTE
701 # define PNG_WRITE_EMPTY_PLTE_SUPPORTED
702 #endif
703 #endif
704 
705 #endif /* PNG_WRITE_SUPPORTED */
706 
707 #ifndef PNG_1_0_X
708 # ifndef PNG_NO_ERROR_NUMBERS
709 # define PNG_ERROR_NUMBERS_SUPPORTED
710 # endif
711 #endif /* PNG_1_0_X */
712 
713 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
714  defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
715 # ifndef PNG_NO_USER_TRANSFORM_PTR
716 # define PNG_USER_TRANSFORM_PTR_SUPPORTED
717 # endif
718 #endif
720 #ifndef PNG_NO_STDIO
721 # define PNG_TIME_RFC1123_SUPPORTED
722 #endif
723 
724 /* This adds extra functions in pngget.c for accessing data from the
725  * info pointer (added in version 0.99)
726  * png_get_image_width()
727  * png_get_image_height()
728  * png_get_bit_depth()
729  * png_get_color_type()
730  * png_get_compression_type()
731  * png_get_filter_type()
732  * png_get_interlace_type()
733  * png_get_pixel_aspect_ratio()
734  * png_get_pixels_per_meter()
735  * png_get_x_offset_pixels()
736  * png_get_y_offset_pixels()
737  * png_get_x_offset_microns()
738  * png_get_y_offset_microns()
739  */
740 #if !defined(PNG_NO_EASY_ACCESS) && !defined(PNG_EASY_ACCESS_SUPPORTED)
741 # define PNG_EASY_ACCESS_SUPPORTED
742 #endif
743 
744 /* PNG_ASSEMBLER_CODE was enabled by default in version 1.2.0
745  * and removed from version 1.2.20. The following will be removed
746  * from libpng-1.4.0
747 */
748 
749 #if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_OPTIMIZED_CODE)
750 # ifndef PNG_OPTIMIZED_CODE_SUPPORTED
751 # define PNG_OPTIMIZED_CODE_SUPPORTED
752 # endif
753 #endif
754 
755 #if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_ASSEMBLER_CODE) && defined(__i386__)
756 # ifndef PNG_ASSEMBLER_CODE_SUPPORTED
757 # define PNG_ASSEMBLER_CODE_SUPPORTED
758 # endif
759 
760 # if defined(__GNUC__) && defined(__x86_64__) && (__GNUC__ < 4)
761  /* work around 64-bit gcc compiler bugs in gcc-3.x */
762 # if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
763 # define PNG_NO_MMX_CODE
764 # endif
765 # endif
766 
767 # if defined(__APPLE__)
768 # if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
769 # define PNG_NO_MMX_CODE
770 # endif
771 # endif
772 
773 # if (defined(__MWERKS__) && ((__MWERKS__ < 0x0900) || macintosh))
774 # if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
775 # define PNG_NO_MMX_CODE
776 # endif
777 # endif
778 
779 # if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
780 # define PNG_MMX_CODE_SUPPORTED
781 # endif
782 
783 #endif
784 /* end of obsolete code to be removed from libpng-1.4.0 */
785 
786 #if !defined(PNG_1_0_X)
787 #if !defined(PNG_NO_USER_MEM) && !defined(PNG_USER_MEM_SUPPORTED)
788 # define PNG_USER_MEM_SUPPORTED
789 #endif
790 #endif /* PNG_1_0_X */
791 
792 /* Added at libpng-1.2.6 */
793 #if !defined(PNG_1_0_X)
794 #ifndef PNG_SET_USER_LIMITS_SUPPORTED
795 #if !defined(PNG_NO_SET_USER_LIMITS) && !defined(PNG_SET_USER_LIMITS_SUPPORTED)
796 # define PNG_SET_USER_LIMITS_SUPPORTED
797 #endif
798 #endif
799 #endif /* PNG_1_0_X */
800 
801 /* Added at libpng-1.0.16 and 1.2.6. To accept all valid PNGS no matter
802  * how large, set these limits to 0x7fffffffL
803  */
804 #ifndef PNG_USER_WIDTH_MAX
805 # define PNG_USER_WIDTH_MAX 1000000L
806 #endif
807 #ifndef PNG_USER_HEIGHT_MAX
808 # define PNG_USER_HEIGHT_MAX 1000000L
809 #endif
810 
811 /* Added at libpng-1.2.34 and 1.4.0 */
812 #ifndef PNG_STRING_NEWLINE
813 #define PNG_STRING_NEWLINE "\n"
814 #endif
815 
816 /* These are currently experimental features, define them if you want */
817 
818 /* very little testing */
819 /*
820 #ifdef PNG_READ_SUPPORTED
821 # ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
822 # define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
823 # endif
824 #endif
825 */
826 
827 /* This is only for PowerPC big-endian and 680x0 systems */
828 /* some testing */
829 /*
830 #ifndef PNG_READ_BIG_ENDIAN_SUPPORTED
831 # define PNG_READ_BIG_ENDIAN_SUPPORTED
832 #endif
833 */
834 
835 /* Buggy compilers (e.g., gcc 2.7.2.2) need this */
836 /*
837 #define PNG_NO_POINTER_INDEXING
838 */
839 
840 /* These functions are turned off by default, as they will be phased out. */
841 /*
842 #define PNG_USELESS_TESTS_SUPPORTED
843 #define PNG_CORRECT_PALETTE_SUPPORTED
844 */
845 
846 /* Any chunks you are not interested in, you can undef here. The
847  * ones that allocate memory may be expecially important (hIST,
848  * tEXt, zTXt, tRNS, pCAL). Others will just save time and make png_info
849  * a bit smaller.
850  */
851 
852 #if defined(PNG_READ_SUPPORTED) && \
853  !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
854  !defined(PNG_NO_READ_ANCILLARY_CHUNKS)
855 # define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
856 #endif
857 
858 #if defined(PNG_WRITE_SUPPORTED) && \
859  !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
860  !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS)
861 # define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
862 #endif
863 
864 #ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
865 
866 #ifdef PNG_NO_READ_TEXT
867 # define PNG_NO_READ_iTXt
868 # define PNG_NO_READ_tEXt
869 # define PNG_NO_READ_zTXt
870 #endif
871 #ifndef PNG_NO_READ_bKGD
872 # define PNG_READ_bKGD_SUPPORTED
873 # define PNG_bKGD_SUPPORTED
874 #endif
875 #ifndef PNG_NO_READ_cHRM
876 # define PNG_READ_cHRM_SUPPORTED
877 # define PNG_cHRM_SUPPORTED
878 #endif
879 #ifndef PNG_NO_READ_gAMA
880 # define PNG_READ_gAMA_SUPPORTED
881 # define PNG_gAMA_SUPPORTED
882 #endif
883 #ifndef PNG_NO_READ_hIST
884 # define PNG_READ_hIST_SUPPORTED
885 # define PNG_hIST_SUPPORTED
886 #endif
887 #ifndef PNG_NO_READ_iCCP
888 # define PNG_READ_iCCP_SUPPORTED
889 # define PNG_iCCP_SUPPORTED
890 #endif
891 #ifndef PNG_NO_READ_iTXt
892 # ifndef PNG_READ_iTXt_SUPPORTED
893 # define PNG_READ_iTXt_SUPPORTED
894 # endif
895 # ifndef PNG_iTXt_SUPPORTED
896 # define PNG_iTXt_SUPPORTED
897 # endif
898 #endif
899 #ifndef PNG_NO_READ_oFFs
900 # define PNG_READ_oFFs_SUPPORTED
901 # define PNG_oFFs_SUPPORTED
902 #endif
903 #ifndef PNG_NO_READ_pCAL
904 # define PNG_READ_pCAL_SUPPORTED
905 # define PNG_pCAL_SUPPORTED
906 #endif
907 #ifndef PNG_NO_READ_sCAL
908 # define PNG_READ_sCAL_SUPPORTED
909 # define PNG_sCAL_SUPPORTED
910 #endif
911 #ifndef PNG_NO_READ_pHYs
912 # define PNG_READ_pHYs_SUPPORTED
913 # define PNG_pHYs_SUPPORTED
914 #endif
915 #ifndef PNG_NO_READ_sBIT
916 # define PNG_READ_sBIT_SUPPORTED
917 # define PNG_sBIT_SUPPORTED
918 #endif
919 #ifndef PNG_NO_READ_sPLT
920 # define PNG_READ_sPLT_SUPPORTED
921 # define PNG_sPLT_SUPPORTED
922 #endif
923 #ifndef PNG_NO_READ_sRGB
924 # define PNG_READ_sRGB_SUPPORTED
925 # define PNG_sRGB_SUPPORTED
926 #endif
927 #ifndef PNG_NO_READ_tEXt
928 # define PNG_READ_tEXt_SUPPORTED
929 # define PNG_tEXt_SUPPORTED
930 #endif
931 #ifndef PNG_NO_READ_tIME
932 # define PNG_READ_tIME_SUPPORTED
933 # define PNG_tIME_SUPPORTED
934 #endif
935 #ifndef PNG_NO_READ_tRNS
936 # define PNG_READ_tRNS_SUPPORTED
937 # define PNG_tRNS_SUPPORTED
938 #endif
939 #ifndef PNG_NO_READ_zTXt
940 # define PNG_READ_zTXt_SUPPORTED
941 # define PNG_zTXt_SUPPORTED
942 #endif
943 #ifndef PNG_NO_READ_UNKNOWN_CHUNKS
944 # define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
945 # ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
946 # define PNG_UNKNOWN_CHUNKS_SUPPORTED
947 # endif
948 # ifndef PNG_NO_HANDLE_AS_UNKNOWN
949 # define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
950 # endif
951 #endif
952 #if !defined(PNG_NO_READ_USER_CHUNKS) && \
953  defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
954 # define PNG_READ_USER_CHUNKS_SUPPORTED
955 # define PNG_USER_CHUNKS_SUPPORTED
956 # ifdef PNG_NO_READ_UNKNOWN_CHUNKS
957 # undef PNG_NO_READ_UNKNOWN_CHUNKS
958 # endif
959 # ifdef PNG_NO_HANDLE_AS_UNKNOWN
960 # undef PNG_NO_HANDLE_AS_UNKNOWN
961 # endif
962 #endif
963 #ifndef PNG_NO_READ_OPT_PLTE
964 # define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */
965 #endif /* optional PLTE chunk in RGB and RGBA images */
966 #if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \
967  defined(PNG_READ_zTXt_SUPPORTED)
968 # define PNG_READ_TEXT_SUPPORTED
969 # define PNG_TEXT_SUPPORTED
970 #endif
971 
972 #endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */
973 
974 #ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
975 
976 #ifdef PNG_NO_WRITE_TEXT
977 # define PNG_NO_WRITE_iTXt
978 # define PNG_NO_WRITE_tEXt
979 # define PNG_NO_WRITE_zTXt
980 #endif
981 #ifndef PNG_NO_WRITE_bKGD
982 # define PNG_WRITE_bKGD_SUPPORTED
983 # ifndef PNG_bKGD_SUPPORTED
984 # define PNG_bKGD_SUPPORTED
985 # endif
986 #endif
987 #ifndef PNG_NO_WRITE_cHRM
988 # define PNG_WRITE_cHRM_SUPPORTED
989 # ifndef PNG_cHRM_SUPPORTED
990 # define PNG_cHRM_SUPPORTED
991 # endif
992 #endif
993 #ifndef PNG_NO_WRITE_gAMA
994 # define PNG_WRITE_gAMA_SUPPORTED
995 # ifndef PNG_gAMA_SUPPORTED
996 # define PNG_gAMA_SUPPORTED
997 # endif
998 #endif
999 #ifndef PNG_NO_WRITE_hIST
1000 # define PNG_WRITE_hIST_SUPPORTED
1001 # ifndef PNG_hIST_SUPPORTED
1002 # define PNG_hIST_SUPPORTED
1003 # endif
1004 #endif
1005 #ifndef PNG_NO_WRITE_iCCP
1006 # define PNG_WRITE_iCCP_SUPPORTED
1007 # ifndef PNG_iCCP_SUPPORTED
1008 # define PNG_iCCP_SUPPORTED
1009 # endif
1010 #endif
1011 #ifndef PNG_NO_WRITE_iTXt
1012 # ifndef PNG_WRITE_iTXt_SUPPORTED
1013 # define PNG_WRITE_iTXt_SUPPORTED
1014 # endif
1015 # ifndef PNG_iTXt_SUPPORTED
1016 # define PNG_iTXt_SUPPORTED
1017 # endif
1018 #endif
1019 #ifndef PNG_NO_WRITE_oFFs
1020 # define PNG_WRITE_oFFs_SUPPORTED
1021 # ifndef PNG_oFFs_SUPPORTED
1022 # define PNG_oFFs_SUPPORTED
1023 # endif
1024 #endif
1025 #ifndef PNG_NO_WRITE_pCAL
1026 # define PNG_WRITE_pCAL_SUPPORTED
1027 # ifndef PNG_pCAL_SUPPORTED
1028 # define PNG_pCAL_SUPPORTED
1029 # endif
1030 #endif
1031 #ifndef PNG_NO_WRITE_sCAL
1032 # define PNG_WRITE_sCAL_SUPPORTED
1033 # ifndef PNG_sCAL_SUPPORTED
1034 # define PNG_sCAL_SUPPORTED
1035 # endif
1036 #endif
1037 #ifndef PNG_NO_WRITE_pHYs
1038 # define PNG_WRITE_pHYs_SUPPORTED
1039 # ifndef PNG_pHYs_SUPPORTED
1040 # define PNG_pHYs_SUPPORTED
1041 # endif
1042 #endif
1043 #ifndef PNG_NO_WRITE_sBIT
1044 # define PNG_WRITE_sBIT_SUPPORTED
1045 # ifndef PNG_sBIT_SUPPORTED
1046 # define PNG_sBIT_SUPPORTED
1047 # endif
1048 #endif
1049 #ifndef PNG_NO_WRITE_sPLT
1050 # define PNG_WRITE_sPLT_SUPPORTED
1051 # ifndef PNG_sPLT_SUPPORTED
1052 # define PNG_sPLT_SUPPORTED
1053 # endif
1054 #endif
1055 #ifndef PNG_NO_WRITE_sRGB
1056 # define PNG_WRITE_sRGB_SUPPORTED
1057 # ifndef PNG_sRGB_SUPPORTED
1058 # define PNG_sRGB_SUPPORTED
1059 # endif
1060 #endif
1061 #ifndef PNG_NO_WRITE_tEXt
1062 # define PNG_WRITE_tEXt_SUPPORTED
1063 # ifndef PNG_tEXt_SUPPORTED
1064 # define PNG_tEXt_SUPPORTED
1065 # endif
1066 #endif
1067 #ifndef PNG_NO_WRITE_tIME
1068 # define PNG_WRITE_tIME_SUPPORTED
1069 # ifndef PNG_tIME_SUPPORTED
1070 # define PNG_tIME_SUPPORTED
1071 # endif
1072 #endif
1073 #ifndef PNG_NO_WRITE_tRNS
1074 # define PNG_WRITE_tRNS_SUPPORTED
1075 # ifndef PNG_tRNS_SUPPORTED
1076 # define PNG_tRNS_SUPPORTED
1077 # endif
1078 #endif
1079 #ifndef PNG_NO_WRITE_zTXt
1080 # define PNG_WRITE_zTXt_SUPPORTED
1081 # ifndef PNG_zTXt_SUPPORTED
1082 # define PNG_zTXt_SUPPORTED
1083 # endif
1084 #endif
1085 #ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS
1086 # define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1087 # ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
1088 # define PNG_UNKNOWN_CHUNKS_SUPPORTED
1089 # endif
1090 # ifndef PNG_NO_HANDLE_AS_UNKNOWN
1091 # ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1092 # define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1093 # endif
1094 # endif
1095 #endif
1096 #if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
1097  defined(PNG_WRITE_zTXt_SUPPORTED)
1098 # define PNG_WRITE_TEXT_SUPPORTED
1099 # ifndef PNG_TEXT_SUPPORTED
1100 # define PNG_TEXT_SUPPORTED
1101 # endif
1102 #endif
1103 
1104 #endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */
1105 
1106 /* Turn this off to disable png_read_png() and
1107  * png_write_png() and leave the row_pointers member
1108  * out of the info structure.
1109  */
1110 #ifndef PNG_NO_INFO_IMAGE
1111 # define PNG_INFO_IMAGE_SUPPORTED
1112 #endif
1113 
1114 /* need the time information for reading tIME chunks */
1115 #if defined(PNG_tIME_SUPPORTED)
1116 # if !defined(_WIN32_WCE)
1117  /* "time.h" functions are not supported on WindowsCE */
1118 # include <time.h>
1119 # endif
1120 #endif
1121 
1122 /* Some typedefs to get us started. These should be safe on most of the
1123  * common platforms. The typedefs should be at least as large as the
1124  * numbers suggest (a png_uint_32 must be at least 32 bits long), but they
1125  * don't have to be exactly that size. Some compilers dislike passing
1126  * unsigned shorts as function parameters, so you may be better off using
1127  * unsigned int for png_uint_16. Likewise, for 64-bit systems, you may
1128  * want to have unsigned int for png_uint_32 instead of unsigned long.
1129  */
1131 typedef unsigned long png_uint_32;
1132 typedef long png_int_32;
1133 typedef unsigned short png_uint_16;
1134 typedef short png_int_16;
1135 typedef unsigned char png_byte;
1136 
1137 /* This is usually size_t. It is typedef'ed just in case you need it to
1138  change (I'm not sure if you will or not, so I thought I'd be safe) */
1139 #ifdef PNG_SIZE_T
1140  typedef PNG_SIZE_T png_size_t;
1141 # define png_sizeof(x) png_convert_size(sizeof(x))
1142 #else
1143  typedef size_t png_size_t;
1144 # define png_sizeof(x) sizeof(x)
1145 #endif
1146 
1147 /* The following is needed for medium model support. It cannot be in the
1148  * PNG_INTERNAL section. Needs modification for other compilers besides
1149  * MSC. Model independent support declares all arrays and pointers to be
1150  * large using the far keyword. The zlib version used must also support
1151  * model independent data. As of version zlib 1.0.4, the necessary changes
1152  * have been made in zlib. The USE_FAR_KEYWORD define triggers other
1153  * changes that are needed. (Tim Wegner)
1154  */
1155 
1156 /* Separate compiler dependencies (problem here is that zlib.h always
1157  defines FAR. (SJT) */
1158 #ifdef __BORLANDC__
1159 # if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)
1160 # define LDATA 1
1161 # else
1162 # define LDATA 0
1163 # endif
1164  /* GRR: why is Cygwin in here? Cygwin is not Borland C... */
1165 # if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)
1166 # define PNG_MAX_MALLOC_64K
1167 # if (LDATA != 1)
1168 # ifndef FAR
1169 # define FAR __far
1170 # endif
1171 # define USE_FAR_KEYWORD
1172 # endif /* LDATA != 1 */
1173  /* Possibly useful for moving data out of default segment.
1174  * Uncomment it if you want. Could also define FARDATA as
1175  * const if your compiler supports it. (SJT)
1176 # define FARDATA FAR
1177  */
1178 # endif /* __WIN32__, __FLAT__, __CYGWIN__ */
1179 #endif /* __BORLANDC__ */
1180 
1181 
1182 /* Suggest testing for specific compiler first before testing for
1183  * FAR. The Watcom compiler defines both __MEDIUM__ and M_I86MM,
1184  * making reliance oncertain keywords suspect. (SJT)
1185  */
1186 
1187 /* MSC Medium model */
1188 #if defined(FAR)
1189 # if defined(M_I86MM)
1190 # define USE_FAR_KEYWORD
1191 # define FARDATA FAR
1192 # include <dos.h>
1193 # endif
1194 #endif
1195 
1196 /* SJT: default case */
1197 #ifndef FAR
1198 # define FAR
1199 #endif
1200 
1201 /* At this point FAR is always defined */
1202 #ifndef FARDATA
1203 # define FARDATA
1204 #endif
1205 
1206 /* Typedef for floating-point numbers that are converted
1207  to fixed-point with a multiple of 100,000, e.g., int_gamma */
1208 typedef png_int_32 png_fixed_point;
1210 /* Add typedefs for pointers */
1211 typedef void FAR * png_voidp;
1218 typedef char FAR * png_charp;
1220 
1221 #ifndef PNG_NO_STDIO
1222 #if defined(_WIN32_WCE)
1223 typedef HANDLE png_FILE_p;
1224 #else
1225 typedef FILE * png_FILE_p;
1226 #endif
1227 #endif
1229 #ifdef PNG_FLOATING_POINT_SUPPORTED
1230 typedef double FAR * png_doublep;
1231 #endif
1233 /* Pointers to pointers; i.e. arrays */
1240 typedef char FAR * FAR * png_charpp;
1242 #ifdef PNG_FLOATING_POINT_SUPPORTED
1243 typedef double FAR * FAR * png_doublepp;
1244 #endif
1246 /* Pointers to pointers to pointers; i.e., pointer to array */
1247 typedef char FAR * FAR * FAR * png_charppp;
1248 
1249 #if defined(PNG_1_0_X) || defined(PNG_1_2_X)
1250 /* SPC - Is this stuff deprecated? */
1251 /* It'll be removed as of libpng-1.3.0 - GR-P */
1252 /* libpng typedefs for types in zlib. If zlib changes
1253  * or another compression library is used, then change these.
1254  * Eliminates need to change all the source files.
1255  */
1256 typedef charf * png_zcharp;
1257 typedef charf * FAR * png_zcharpp;
1258 typedef z_stream FAR * png_zstreamp;
1259 #endif /* (PNG_1_0_X) || defined(PNG_1_2_X) */
1260 
1261 /*
1262  * Define PNG_BUILD_DLL if the module being built is a Windows
1263  * LIBPNG DLL.
1264  *
1265  * Define PNG_USE_DLL if you want to *link* to the Windows LIBPNG DLL.
1266  * It is equivalent to Microsoft predefined macro _DLL that is
1267  * automatically defined when you compile using the share
1268  * version of the CRT (C Run-Time library)
1269  *
1270  * The cygwin mods make this behavior a little different:
1271  * Define PNG_BUILD_DLL if you are building a dll for use with cygwin
1272  * Define PNG_STATIC if you are building a static library for use with cygwin,
1273  * -or- if you are building an application that you want to link to the
1274  * static library.
1275  * PNG_USE_DLL is defined by default (no user action needed) unless one of
1276  * the other flags is defined.
1277  */
1278 
1279 #if !defined(PNG_DLL) && (defined(PNG_BUILD_DLL) || defined(PNG_USE_DLL))
1280 # define PNG_DLL
1281 #endif
1282 /* If CYGWIN, then disallow GLOBAL ARRAYS unless building a static lib.
1283  * When building a static lib, default to no GLOBAL ARRAYS, but allow
1284  * command-line override
1285  */
1286 #if defined(__CYGWIN__)
1287 # if !defined(PNG_STATIC)
1288 # if defined(PNG_USE_GLOBAL_ARRAYS)
1289 # undef PNG_USE_GLOBAL_ARRAYS
1290 # endif
1291 # if !defined(PNG_USE_LOCAL_ARRAYS)
1292 # define PNG_USE_LOCAL_ARRAYS
1293 # endif
1294 # else
1295 # if defined(PNG_USE_LOCAL_ARRAYS) || defined(PNG_NO_GLOBAL_ARRAYS)
1296 # if defined(PNG_USE_GLOBAL_ARRAYS)
1297 # undef PNG_USE_GLOBAL_ARRAYS
1298 # endif
1299 # endif
1300 # endif
1301 # if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1302 # define PNG_USE_LOCAL_ARRAYS
1303 # endif
1304 #endif
1305 
1306 /* Do not use global arrays (helps with building DLL's)
1307  * They are no longer used in libpng itself, since version 1.0.5c,
1308  * but might be required for some pre-1.0.5c applications.
1309  */
1310 #if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1311 # if defined(PNG_NO_GLOBAL_ARRAYS) || \
1312  (defined(__GNUC__) && defined(PNG_DLL)) || defined(_MSC_VER)
1313 # define PNG_USE_LOCAL_ARRAYS
1314 # else
1315 # define PNG_USE_GLOBAL_ARRAYS
1316 # endif
1317 #endif
1318 
1319 #if defined(__CYGWIN__)
1320 # undef PNGAPI
1321 # define PNGAPI __cdecl
1322 # undef PNG_IMPEXP
1323 # define PNG_IMPEXP
1324 #endif
1325 
1326 /* If you define PNGAPI, e.g., with compiler option "-DPNGAPI=__stdcall",
1327  * you may get warnings regarding the linkage of png_zalloc and png_zfree.
1328  * Don't ignore those warnings; you must also reset the default calling
1329  * convention in your compiler to match your PNGAPI, and you must build
1330  * zlib and your applications the same way you build libpng.
1331  */
1332 
1333 #if defined(__MINGW32__) && !defined(PNG_MODULEDEF)
1334 # ifndef PNG_NO_MODULEDEF
1335 # define PNG_NO_MODULEDEF
1336 # endif
1337 #endif
1338 
1339 #if !defined(PNG_IMPEXP) && defined(PNG_BUILD_DLL) && !defined(PNG_NO_MODULEDEF)
1340 # define PNG_IMPEXP
1341 #endif
1342 
1343 #if defined(PNG_DLL) || defined(_DLL) || defined(__DLL__ ) || \
1344  (( defined(_Windows) || defined(_WINDOWS) || \
1345  defined(WIN32) || defined(_WIN32) || defined(__WIN32__) ))
1346 
1347 # ifndef PNGAPI
1348 # if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
1349 # define PNGAPI __cdecl
1350 # else
1351 # define PNGAPI _cdecl
1352 # endif
1353 # endif
1354 
1355 # if !defined(PNG_IMPEXP) && (!defined(PNG_DLL) || \
1356  0 /* WINCOMPILER_WITH_NO_SUPPORT_FOR_DECLIMPEXP */)
1357 # define PNG_IMPEXP
1358 # endif
1359 
1360 # if !defined(PNG_IMPEXP)
1361 
1362 # define PNG_EXPORT_TYPE1(type,symbol) PNG_IMPEXP type PNGAPI symbol
1363 # define PNG_EXPORT_TYPE2(type,symbol) type PNG_IMPEXP PNGAPI symbol
1364 
1365  /* Borland/Microsoft */
1366 # if defined(_MSC_VER) || defined(__BORLANDC__)
1367 # if (_MSC_VER >= 800) || (__BORLANDC__ >= 0x500)
1368 # define PNG_EXPORT PNG_EXPORT_TYPE1
1369 # else
1370 # define PNG_EXPORT PNG_EXPORT_TYPE2
1371 # if defined(PNG_BUILD_DLL)
1372 # define PNG_IMPEXP __export
1373 # else
1374 # define PNG_IMPEXP /*__import */ /* doesn't exist AFAIK in
1375  VC++ */
1376 # endif /* Exists in Borland C++ for
1377  C++ classes (== huge) */
1378 # endif
1379 # endif
1380 
1381 # if !defined(PNG_IMPEXP)
1382 # if defined(PNG_BUILD_DLL)
1383 # define PNG_IMPEXP __declspec(dllexport)
1384 # else
1385 # define PNG_IMPEXP __declspec(dllimport)
1386 # endif
1387 # endif
1388 # endif /* PNG_IMPEXP */
1389 #else /* !(DLL || non-cygwin WINDOWS) */
1390 # if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
1391 # ifndef PNGAPI
1392 # define PNGAPI _System
1393 # endif
1394 # else
1395 # if 0 /* ... other platforms, with other meanings */
1396 # endif
1397 # endif
1398 #endif
1400 #ifndef PNGAPI
1401 # define PNGAPI
1402 #endif
1403 #ifndef PNG_IMPEXP
1404 # define PNG_IMPEXP
1405 #endif
1406 
1407 #ifdef PNG_BUILDSYMS
1408 # ifndef PNG_EXPORT
1409 # define PNG_EXPORT(type,symbol) PNG_FUNCTION_EXPORT symbol END
1410 # endif
1411 # ifdef PNG_USE_GLOBAL_ARRAYS
1412 # ifndef PNG_EXPORT_VAR
1413 # define PNG_EXPORT_VAR(type) PNG_DATA_EXPORT
1414 # endif
1415 # endif
1416 #endif
1418 #ifndef PNG_EXPORT
1419 # define PNG_EXPORT(type,symbol) PNG_IMPEXP type PNGAPI symbol
1420 #endif
1421 
1422 #ifdef PNG_USE_GLOBAL_ARRAYS
1423 # ifndef PNG_EXPORT_VAR
1424 # define PNG_EXPORT_VAR(type) extern PNG_IMPEXP type
1425 # endif
1426 #endif
1427 
1428 /* User may want to use these so they are not in PNG_INTERNAL. Any library
1429  * functions that are passed far data must be model independent.
1430  */
1432 #ifndef PNG_ABORT
1433 # define PNG_ABORT() abort()
1434 #endif
1436 #ifdef PNG_SETJMP_SUPPORTED
1437 # define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf)
1438 #else
1439 # define png_jmpbuf(png_ptr) \
1440  (LIBPNG_WAS_COMPILED_WITH__PNG_SETJMP_NOT_SUPPORTED)
1441 #endif
1442 
1443 #if defined(USE_FAR_KEYWORD) /* memory model independent fns */
1444 /* use this to make far-to-near assignments */
1445 # define CHECK 1
1446 # define NOCHECK 0
1447 # define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK))
1448 # define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK))
1449 # define png_snprintf _fsnprintf /* Added to v 1.2.19 */
1450 # define png_strlen _fstrlen
1451 # define png_memcmp _fmemcmp /* SJT: added */
1452 # define png_memcpy _fmemcpy
1453 # define png_memset _fmemset
1454 #else /* use the usual functions */
1455 # define CVT_PTR(ptr) (ptr)
1456 # define CVT_PTR_NOCHECK(ptr) (ptr)
1457 # ifndef PNG_NO_SNPRINTF
1458 # ifdef _MSC_VER
1459 # define png_snprintf _snprintf /* Added to v 1.2.19 */
1460 # define png_snprintf2 _snprintf
1461 # define png_snprintf6 _snprintf
1462 # else
1463 # define png_snprintf snprintf /* Added to v 1.2.19 */
1464 # define png_snprintf2 snprintf
1465 # define png_snprintf6 snprintf
1466 # endif
1467 # else
1468  /* You don't have or don't want to use snprintf(). Caution: Using
1469  * sprintf instead of snprintf exposes your application to accidental
1470  * or malevolent buffer overflows. If you don't have snprintf()
1471  * as a general rule you should provide one (you can get one from
1472  * Portable OpenSSH). */
1473 # define png_snprintf(s1,n,fmt,x1) sprintf(s1,fmt,x1)
1474 # define png_snprintf2(s1,n,fmt,x1,x2) sprintf(s1,fmt,x1,x2)
1475 # define png_snprintf6(s1,n,fmt,x1,x2,x3,x4,x5,x6) \
1476  sprintf(s1,fmt,x1,x2,x3,x4,x5,x6)
1477 # endif
1478 # define png_strlen strlen
1479 # define png_memcmp memcmp /* SJT: added */
1480 # define png_memcpy memcpy
1481 # define png_memset memset
1482 #endif
1483 /* End of memory model independent support */
1484 
1485 /* Just a little check that someone hasn't tried to define something
1486  * contradictory.
1487  */
1488 #if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K)
1489 # undef PNG_ZBUF_SIZE
1490 # define PNG_ZBUF_SIZE 65536L
1491 #endif
1492 
1493 /* Added at libpng-1.2.8 */
1494 #endif /* PNG_VERSION_INFO_ONLY */
1495 
1496 #endif /* PNGCONF_H */