1 /* pngconf.h - machine configurable file for libpng
3 * libpng 1.2.0 - September 1, 2001
4 * For conditions of distribution and use, see copyright notice in png.h
5 * Copyright (c) 1998-2001 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.)
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,
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.
33 # define PNG_ZBUF_SIZE 8192
36 /* Enable if you want a write-only libpng */
38 #ifndef PNG_NO_READ_SUPPORTED
39 # define PNG_READ_SUPPORTED
42 /* Enable if you want a read-only libpng */
44 #ifndef PNG_NO_WRITE_SUPPORTED
45 # define PNG_WRITE_SUPPORTED
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 #ifndef PNG_NO_MNG_FEATURES
51 # ifndef PNG_MNG_FEATURES_SUPPORTED
52 # define PNG_MNG_FEATURES_SUPPORTED
56 #ifndef PNG_NO_FLOATING_POINT_SUPPORTED
57 # ifndef PNG_FLOATING_POINT_SUPPORTED
58 # define PNG_FLOATING_POINT_SUPPORTED
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
70 #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
71 # define PNG_MAX_MALLOC_64K
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 -- building the dll
82 * (no define) -- building an application, linking to the dll
83 * PNG_STATIC -- building the static lib, or building an application
84 * that links to the static lib.
85 * ALL_STATIC -- building various static libs, or building an application
86 * that links to the static libs.
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
93 * Also, the precedence order is:
94 * ALL_STATIC (since we can't #undef something outside our namespace)
97 * (nothing) == PNG_USE_DLL
99 #if defined(__CYGWIN__)
100 # if defined(ALL_STATIC)
101 # if defined(PNG_BUILD_DLL)
102 # undef PNG_BUILD_DLL
104 # if defined(PNG_USE_DLL)
107 # if defined(PNG_DLL)
110 # if !defined(PNG_STATIC)
114 # if defined (PNG_BUILD_DLL)
115 # if defined(PNG_STATIC)
118 # if defined(PNG_USE_DLL)
121 # if !defined(PNG_DLL)
125 # if defined(PNG_STATIC)
126 # if defined(PNG_USE_DLL)
129 # if defined(PNG_DLL)
133 # if !defined(PNG_USE_DLL)
136 # if !defined(PNG_DLL)
144 /* This protects us against compilers that run on a windowing system
145 * and thus don't have or would rather us not use the stdio types:
146 * stdin, stdout, and stderr. The only one currently used is stderr
147 * in png_error() and png_warning(). #defining PNG_NO_CONSOLE_IO will
148 * prevent these from being compiled and used. #defining PNG_NO_STDIO
149 * will also prevent these, plus will prevent the entire set of stdio
150 * macros and functions (FILE *, printf, etc.) from being compiled and used,
151 * unless (PNG_DEBUG > 0) has been #defined.
153 * #define PNG_NO_CONSOLE_IO
154 * #define PNG_NO_STDIO
157 #if defined(_WIN32_WCE)
158 # include <windows.h>
159 /* Console I/O functions are not supported on WindowsCE */
160 # define PNG_NO_CONSOLE_IO
167 # ifndef PNG_CONSOLE_IO_SUPPORTED
168 # ifndef PNG_NO_CONSOLE_IO
169 # define PNG_NO_CONSOLE_IO
175 # ifndef PNG_NO_CONSOLE_IO
176 # define PNG_NO_CONSOLE_IO
184 # if !defined(_WIN32_WCE)
185 /* "stdio.h" functions are not supported on WindowsCE */
190 /* This macro protects us against machines that don't have function
191 * prototypes (ie K&R style headers). If your compiler does not handle
192 * function prototypes, define this macro and use the included ansi2knr.
193 * I've always been able to use _NO_PROTO as the indicator, but you may
194 * need to drag the empty declaration out in front of here, or change the
195 * ifdef to suit your own needs.
199 #ifdef OF /* zlib prototype munger */
200 # define PNGARG(arglist) OF(arglist)
204 # define PNGARG(arglist) ()
206 # define PNGARG(arglist) arglist
207 #endif /* _NO_PROTO */
213 /* Try to determine if we are compiling on a Mac. Note that testing for
214 * just __MWERKS__ is not good enough, because the Codewarrior is now used
215 * on non-Mac platforms.
218 # if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
219 defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC)
224 /* enough people need this for various reasons to include it here */
225 #if !defined(MACOS) && !defined(RISCOS) && !defined(_WIN32_WCE)
226 # include <sys/types.h>
229 #if !defined(PNG_SETJMP_NOT_SUPPORTED) && !defined(PNG_NO_SETJMP_SUPPORTED)
230 # define PNG_SETJMP_SUPPORTED
233 #ifdef PNG_SETJMP_SUPPORTED
234 /* This is an attempt to force a single setjmp behaviour on Linux. If
235 * the X config stuff didn't define _BSD_SOURCE we wouldn't need this.
240 # define PNG_SAVE_BSD_SOURCE
244 __png.h__ already includes setjmp.h;
245 __dont__ include it again.;
247 # endif /* __linux__ */
249 /* include setjmp.h for error handling */
253 # ifdef PNG_SAVE_BSD_SOURCE
255 # undef PNG_SAVE_BSD_SOURCE
257 # endif /* __linux__ */
258 #endif /* PNG_SETJMP_SUPPORTED */
261 # include <strings.h>
266 /* Other defines for things like memory and the like can go here. */
271 /* The functions exported by PNG_EXTERN are PNG_INTERNAL functions, which
272 * aren't usually used outside the library (as far as I know), so it is
273 * debatable if they should be exported at all. In the future, when it is
274 * possible to have run-time registry of chunk-handling functions, some of
275 * these will be made available again.
276 #define PNG_EXTERN extern
280 /* Other defines specific to compilers can go here. Try to keep
281 * them inside an appropriate ifdef/endif pair for portability.
284 #if defined(PNG_FLOATING_POINT_SUPPORTED)
286 /* We need to check that <math.h> hasn't already been included earlier
287 * as it seems it doesn't agree with <fp.h>, yet we should really use
288 * <fp.h> if possible.
290 # if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__)
296 # if defined(_AMIGA) && defined(__SASC) && defined(_M68881)
297 /* Amiga SAS/C: We must include builtin FPU functions when compiling using
304 /* Codewarrior on NT has linking problems without this. */
305 #if (defined(__MWERKS__) && defined(WIN32)) || defined(__STDC__)
306 # define PNG_ALWAYS_EXTERN
309 /* For some reason, Borland C++ defines memcmp, etc. in mem.h, not
310 * stdlib.h like it should (I think). Or perhaps this is a C++
318 #if defined(_MSC_VER) && (defined(WIN32) || defined(_Windows) || \
319 defined(_WINDOWS) || defined(_WIN32) || defined(__WIN32__))
323 /* This controls how fine the dithering gets. As this allocates
324 * a largish chunk of memory (32K), those who are not as concerned
325 * with dithering quality can decrease some or all of these.
327 #ifndef PNG_DITHER_RED_BITS
328 # define PNG_DITHER_RED_BITS 5
330 #ifndef PNG_DITHER_GREEN_BITS
331 # define PNG_DITHER_GREEN_BITS 5
333 #ifndef PNG_DITHER_BLUE_BITS
334 # define PNG_DITHER_BLUE_BITS 5
337 /* This controls how fine the gamma correction becomes when you
338 * are only interested in 8 bits anyway. Increasing this value
339 * results in more memory being used, and more pow() functions
340 * being called to fill in the gamma tables. Don't set this value
341 * less then 8, and even that may not work (I haven't tested it).
344 #ifndef PNG_MAX_GAMMA_8
345 # define PNG_MAX_GAMMA_8 11
348 /* This controls how much a difference in gamma we can tolerate before
349 * we actually start doing gamma conversion.
351 #ifndef PNG_GAMMA_THRESHOLD
352 # define PNG_GAMMA_THRESHOLD 0.05
355 #endif /* PNG_INTERNAL */
357 /* The following uses const char * instead of char * for error
358 * and warning message functions, so some compilers won't complain.
359 * If you do not want to use const, define PNG_NO_CONST here.
363 # define PNG_CONST const
368 /* The following defines give you the ability to remove code from the
369 * library that you will not be using. I wish I could figure out how to
370 * automate this, but I can't do that without making it seriously hard
371 * on the users. So if you are not using an ability, change the #define
372 * to and #undef, and that part of the library will not be compiled. If
373 * your linker can't find a function, you may want to make sure the
374 * ability is defined here. Some of these depend upon some others being
375 * defined. I haven't figured out all the interactions here, so you may
376 * have to experiment awhile to get everything to compile. If you are
377 * creating or using a shared library, you probably shouldn't touch this,
378 * as it will affect the size of the structures, and this will cause bad
379 * things to happen if the library and/or application ever change.
382 /* Any features you will not be using can be undef'ed here */
384 /* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user
385 * to turn it off with "*TRANSFORMS_NOT_SUPPORTED" or *PNG_NO_*_TRANSFORMS
386 * on the compile line, then pick and choose which ones to define without
387 * having to edit this file. It is safe to use the *TRANSFORMS_NOT_SUPPORTED
388 * if you only want to have a png-compliant reader/writer but don't need
389 * any of the extra transformations. This saves about 80 kbytes in a
390 * typical installation of the library. (PNG_NO_* form added in version
391 * 1.0.1c, for consistency)
394 /* The size of the png_text structure changed in libpng-1.0.6 when
395 * iTXt is supported. It is turned off by default, to support old apps
396 * that malloc the png_text structure instead of calling png_set_text()
397 * and letting libpng malloc it. It will be turned on by default in
401 #ifndef PNG_iTXt_SUPPORTED
402 # ifndef PNG_READ_iTXt_SUPPORTED
403 # define PNG_NO_READ_iTXt
405 # ifndef PNG_WRITE_iTXt_SUPPORTED
406 # define PNG_NO_WRITE_iTXt
410 /* The following support, added after version 1.0.0, can be turned off here en
411 * masse by defining PNG_LEGACY_SUPPORTED in case you need binary compatibility
412 * with old applications that require the length of png_struct and png_info
413 * to remain unchanged.
416 #ifdef PNG_LEGACY_SUPPORTED
417 # define PNG_NO_FREE_ME
418 # define PNG_NO_READ_UNKNOWN_CHUNKS
419 # define PNG_NO_WRITE_UNKNOWN_CHUNKS
420 # define PNG_NO_READ_USER_CHUNKS
421 # define PNG_NO_READ_iCCP
422 # define PNG_NO_WRITE_iCCP
423 # define PNG_NO_READ_iTXt
424 # define PNG_NO_WRITE_iTXt
425 # define PNG_NO_READ_sCAL
426 # define PNG_NO_WRITE_sCAL
427 # define PNG_NO_READ_sPLT
428 # define PNG_NO_WRITE_sPLT
429 # define PNG_NO_INFO_IMAGE
430 # define PNG_NO_READ_RGB_TO_GRAY
431 # define PNG_NO_READ_USER_TRANSFORM
432 # define PNG_NO_WRITE_USER_TRANSFORM
433 # define PNG_NO_USER_MEM
434 # define PNG_NO_READ_EMPTY_PLTE
435 # define PNG_NO_MNG_FEATURES
436 # define PNG_NO_FIXED_POINT_SUPPORTED
439 /* Ignore attempt to turn off both floating and fixed point support */
440 #if !defined(PNG_FLOATING_POINT_SUPPORTED) || \
441 !defined(PNG_NO_FIXED_POINT_SUPPORTED)
442 # define PNG_FIXED_POINT_SUPPORTED
445 #ifndef PNG_NO_FREE_ME
446 # define PNG_FREE_ME_SUPPORTED
449 #if defined(PNG_READ_SUPPORTED)
451 #if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \
452 !defined(PNG_NO_READ_TRANSFORMS)
453 # define PNG_READ_TRANSFORMS_SUPPORTED
456 #ifdef PNG_READ_TRANSFORMS_SUPPORTED
457 # ifndef PNG_NO_READ_EXPAND
458 # define PNG_READ_EXPAND_SUPPORTED
460 # ifndef PNG_NO_READ_SHIFT
461 # define PNG_READ_SHIFT_SUPPORTED
463 # ifndef PNG_NO_READ_PACK
464 # define PNG_READ_PACK_SUPPORTED
466 # ifndef PNG_NO_READ_BGR
467 # define PNG_READ_BGR_SUPPORTED
469 # ifndef PNG_NO_READ_SWAP
470 # define PNG_READ_SWAP_SUPPORTED
472 # ifndef PNG_NO_READ_PACKSWAP
473 # define PNG_READ_PACKSWAP_SUPPORTED
475 # ifndef PNG_NO_READ_INVERT
476 # define PNG_READ_INVERT_SUPPORTED
478 # ifndef PNG_NO_READ_DITHER
479 # define PNG_READ_DITHER_SUPPORTED
481 # ifndef PNG_NO_READ_BACKGROUND
482 # define PNG_READ_BACKGROUND_SUPPORTED
484 # ifndef PNG_NO_READ_16_TO_8
485 # define PNG_READ_16_TO_8_SUPPORTED
487 # ifndef PNG_NO_READ_FILLER
488 # define PNG_READ_FILLER_SUPPORTED
490 # ifndef PNG_NO_READ_GAMMA
491 # define PNG_READ_GAMMA_SUPPORTED
493 # ifndef PNG_NO_READ_GRAY_TO_RGB
494 # define PNG_READ_GRAY_TO_RGB_SUPPORTED
496 # ifndef PNG_NO_READ_SWAP_ALPHA
497 # define PNG_READ_SWAP_ALPHA_SUPPORTED
499 # ifndef PNG_NO_READ_INVERT_ALPHA
500 # define PNG_READ_INVERT_ALPHA_SUPPORTED
502 # ifndef PNG_NO_READ_STRIP_ALPHA
503 # define PNG_READ_STRIP_ALPHA_SUPPORTED
505 # ifndef PNG_NO_READ_USER_TRANSFORM
506 # define PNG_READ_USER_TRANSFORM_SUPPORTED
508 # ifndef PNG_NO_READ_RGB_TO_GRAY
509 # define PNG_READ_RGB_TO_GRAY_SUPPORTED
511 #endif /* PNG_READ_TRANSFORMS_SUPPORTED */
513 #if !defined(PNG_NO_PROGRESSIVE_READ) && \
514 !defined(PNG_PROGRESSIVE_READ_NOT_SUPPORTED) /* if you don't do progressive */
515 # define PNG_PROGRESSIVE_READ_SUPPORTED /* reading. This is not talking */
516 #endif /* about interlacing capability! You'll */
517 /* still have interlacing unless you change the following line: */
519 #define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */
521 #ifndef PNG_NO_READ_COMPOSITE_NODIV
522 # ifndef PNG_NO_READ_COMPOSITED_NODIV /* libpng-1.0.x misspelling */
523 # define PNG_READ_COMPOSITE_NODIV_SUPPORTED /* well tested on Intel, SGI */
527 /* Deprecated, will be removed from version 2.0.0.
528 Use PNG_MNG_FEATURES_SUPPORTED instead. */
529 #ifndef PNG_NO_READ_EMPTY_PLTE
530 # define PNG_READ_EMPTY_PLTE_SUPPORTED
533 #endif /* PNG_READ_SUPPORTED */
535 #if defined(PNG_WRITE_SUPPORTED)
537 # if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \
538 !defined(PNG_NO_WRITE_TRANSFORMS)
539 # define PNG_WRITE_TRANSFORMS_SUPPORTED
542 #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
543 # ifndef PNG_NO_WRITE_SHIFT
544 # define PNG_WRITE_SHIFT_SUPPORTED
546 # ifndef PNG_NO_WRITE_PACK
547 # define PNG_WRITE_PACK_SUPPORTED
549 # ifndef PNG_NO_WRITE_BGR
550 # define PNG_WRITE_BGR_SUPPORTED
552 # ifndef PNG_NO_WRITE_SWAP
553 # define PNG_WRITE_SWAP_SUPPORTED
555 # ifndef PNG_NO_WRITE_PACKSWAP
556 # define PNG_WRITE_PACKSWAP_SUPPORTED
558 # ifndef PNG_NO_WRITE_INVERT
559 # define PNG_WRITE_INVERT_SUPPORTED
561 # ifndef PNG_NO_WRITE_FILLER
562 # define PNG_WRITE_FILLER_SUPPORTED /* same as WRITE_STRIP_ALPHA */
564 # ifndef PNG_NO_WRITE_SWAP_ALPHA
565 # define PNG_WRITE_SWAP_ALPHA_SUPPORTED
567 # ifndef PNG_NO_WRITE_INVERT_ALPHA
568 # define PNG_WRITE_INVERT_ALPHA_SUPPORTED
570 # ifndef PNG_NO_WRITE_USER_TRANSFORM
571 # define PNG_WRITE_USER_TRANSFORM_SUPPORTED
573 #endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */
575 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
576 defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
577 # ifndef PNG_NO_USER_TRANSFORM_PTR
578 # define PNG_USER_TRANSFORM_PTR_SUPPORTED
582 #define PNG_WRITE_INTERLACING_SUPPORTED /* not required for PNG-compliant
583 encoders, but can cause trouble
586 #if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \
587 defined(PNG_FLOATING_POINT_SUPPORTED)
588 # define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
591 #ifndef PNG_NO_ERROR_NUMBERS
592 #define PNG_ERROR_NUMBERS_SUPPORTED
595 #ifndef PNG_NO_WRITE_FLUSH
596 # define PNG_WRITE_FLUSH_SUPPORTED
599 /* Deprecated, see PNG_MNG_FEATURES_SUPPORTED, above */
600 #ifndef PNG_NO_WRITE_EMPTY_PLTE
601 # define PNG_WRITE_EMPTY_PLTE_SUPPORTED
604 #endif /* PNG_WRITE_SUPPORTED */
607 # define PNG_TIME_RFC1123_SUPPORTED
610 /* This adds extra functions in pngget.c for accessing data from the
611 * info pointer (added in version 0.99)
612 * png_get_image_width()
613 * png_get_image_height()
614 * png_get_bit_depth()
615 * png_get_color_type()
616 * png_get_compression_type()
617 * png_get_filter_type()
618 * png_get_interlace_type()
619 * png_get_pixel_aspect_ratio()
620 * png_get_pixels_per_meter()
621 * png_get_x_offset_pixels()
622 * png_get_y_offset_pixels()
623 * png_get_x_offset_microns()
624 * png_get_y_offset_microns()
626 #if !defined(PNG_NO_EASY_ACCESS) && !defined(PNG_EASY_ACCESS_SUPPORTED)
627 # define PNG_EASY_ACCESS_SUPPORTED
630 /* PNG_ASSEMBLER_CODE was enabled by default in version 1.2.0
631 even when PNG_USE_PNGVCRD or PNG_USE_PNGGCCRD is not defined */
632 #if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_ASSEMBLER_CODE)
633 # ifndef PNG_ASSEMBLER_CODE_SUPPORTED
634 # define PNG_ASSEMBLER_CODE_SUPPORTED
636 # if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
637 # define PNG_MMX_CODE_SUPPORTED
641 /* If you are sure that you don't need thread safety and you are compiling
642 with PNG_USE_PNGCCRD for an MMX application, you can define this for
643 faster execution. See pnggccrd.c.
644 #define PNG_THREAD_UNSAFE_OK
647 #if !defined(PNG_NO_USER_MEM) && !defined(PNG_USER_MEM_SUPPORTED)
648 # define PNG_USER_MEM_SUPPORTED
651 /* These are currently experimental features, define them if you want */
653 /* very little testing */
655 #ifdef PNG_READ_SUPPORTED
656 # ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
657 # define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
662 /* This is only for PowerPC big-endian and 680x0 systems */
665 #ifdef PNG_READ_SUPPORTED
666 # ifndef PNG_PNG_READ_BIG_ENDIAN_SUPPORTED
667 # define PNG_READ_BIG_ENDIAN_SUPPORTED
672 /* Buggy compilers (e.g., gcc 2.7.2.2) need this */
674 #define PNG_NO_POINTER_INDEXING
677 /* These functions are turned off by default, as they will be phased out. */
679 #define PNG_USELESS_TESTS_SUPPORTED
680 #define PNG_CORRECT_PALETTE_SUPPORTED
683 /* Any chunks you are not interested in, you can undef here. The
684 * ones that allocate memory may be expecially important (hIST,
685 * tEXt, zTXt, tRNS, pCAL). Others will just save time and make png_info
689 #if defined(PNG_READ_SUPPORTED) && \
690 !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
691 !defined(PNG_NO_READ_ANCILLARY_CHUNKS)
692 # define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
695 #if defined(PNG_WRITE_SUPPORTED) && \
696 !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
697 !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS)
698 # define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
701 #ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
703 #ifdef PNG_NO_READ_TEXT
704 # define PNG_NO_READ_iTXt
705 # define PNG_NO_READ_tEXt
706 # define PNG_NO_READ_zTXt
708 #ifndef PNG_NO_READ_bKGD
709 # define PNG_READ_bKGD_SUPPORTED
710 # define PNG_bKGD_SUPPORTED
712 #ifndef PNG_NO_READ_cHRM
713 # define PNG_READ_cHRM_SUPPORTED
714 # define PNG_cHRM_SUPPORTED
716 #ifndef PNG_NO_READ_gAMA
717 # define PNG_READ_gAMA_SUPPORTED
718 # define PNG_gAMA_SUPPORTED
720 #ifndef PNG_NO_READ_hIST
721 # define PNG_READ_hIST_SUPPORTED
722 # define PNG_hIST_SUPPORTED
724 #ifndef PNG_NO_READ_iCCP
725 # define PNG_READ_iCCP_SUPPORTED
726 # define PNG_iCCP_SUPPORTED
728 #ifndef PNG_NO_READ_iTXt
729 # define PNG_READ_iTXt_SUPPORTED
730 # define PNG_iTXt_SUPPORTED
732 #ifndef PNG_NO_READ_oFFs
733 # define PNG_READ_oFFs_SUPPORTED
734 # define PNG_oFFs_SUPPORTED
736 #ifndef PNG_NO_READ_pCAL
737 # define PNG_READ_pCAL_SUPPORTED
738 # define PNG_pCAL_SUPPORTED
740 #ifndef PNG_NO_READ_sCAL
741 # define PNG_READ_sCAL_SUPPORTED
742 # define PNG_sCAL_SUPPORTED
744 #ifndef PNG_NO_READ_pHYs
745 # define PNG_READ_pHYs_SUPPORTED
746 # define PNG_pHYs_SUPPORTED
748 #ifndef PNG_NO_READ_sBIT
749 # define PNG_READ_sBIT_SUPPORTED
750 # define PNG_sBIT_SUPPORTED
752 #ifndef PNG_NO_READ_sPLT
753 # define PNG_READ_sPLT_SUPPORTED
754 # define PNG_sPLT_SUPPORTED
756 #ifndef PNG_NO_READ_sRGB
757 # define PNG_READ_sRGB_SUPPORTED
758 # define PNG_sRGB_SUPPORTED
760 #ifndef PNG_NO_READ_tEXt
761 # define PNG_READ_tEXt_SUPPORTED
762 # define PNG_tEXt_SUPPORTED
764 #ifndef PNG_NO_READ_tIME
765 # define PNG_READ_tIME_SUPPORTED
766 # define PNG_tIME_SUPPORTED
768 #ifndef PNG_NO_READ_tRNS
769 # define PNG_READ_tRNS_SUPPORTED
770 # define PNG_tRNS_SUPPORTED
772 #ifndef PNG_NO_READ_zTXt
773 # define PNG_READ_zTXt_SUPPORTED
774 # define PNG_zTXt_SUPPORTED
776 #ifndef PNG_NO_READ_UNKNOWN_CHUNKS
777 # define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
778 # ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
779 # define PNG_UNKNOWN_CHUNKS_SUPPORTED
781 # ifndef PNG_NO_HANDLE_AS_UNKNOWN
782 # define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
785 #if !defined(PNG_NO_READ_USER_CHUNKS) && \
786 defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
787 # define PNG_READ_USER_CHUNKS_SUPPORTED
788 # define PNG_USER_CHUNKS_SUPPORTED
789 # ifdef PNG_NO_READ_UNKNOWN_CHUNKS
790 # undef PNG_NO_READ_UNKNOWN_CHUNKS
792 # ifdef PNG_NO_HANDLE_AS_UNKNOWN
793 # undef PNG_NO_HANDLE_AS_UNKNOWN
796 #ifndef PNG_NO_READ_OPT_PLTE
797 # define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */
798 #endif /* optional PLTE chunk in RGB and RGBA images */
799 #if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \
800 defined(PNG_READ_zTXt_SUPPORTED)
801 # define PNG_READ_TEXT_SUPPORTED
802 # define PNG_TEXT_SUPPORTED
805 #endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */
807 #ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
809 #ifdef PNG_NO_WRITE_TEXT
810 # define PNG_NO_WRITE_iTXt
811 # define PNG_NO_WRITE_tEXt
812 # define PNG_NO_WRITE_zTXt
814 #ifndef PNG_NO_WRITE_bKGD
815 # define PNG_WRITE_bKGD_SUPPORTED
816 # ifndef PNG_bKGD_SUPPORTED
817 # define PNG_bKGD_SUPPORTED
820 #ifndef PNG_NO_WRITE_cHRM
821 # define PNG_WRITE_cHRM_SUPPORTED
822 # ifndef PNG_cHRM_SUPPORTED
823 # define PNG_cHRM_SUPPORTED
826 #ifndef PNG_NO_WRITE_gAMA
827 # define PNG_WRITE_gAMA_SUPPORTED
828 # ifndef PNG_gAMA_SUPPORTED
829 # define PNG_gAMA_SUPPORTED
832 #ifndef PNG_NO_WRITE_hIST
833 # define PNG_WRITE_hIST_SUPPORTED
834 # ifndef PNG_hIST_SUPPORTED
835 # define PNG_hIST_SUPPORTED
838 #ifndef PNG_NO_WRITE_iCCP
839 # define PNG_WRITE_iCCP_SUPPORTED
840 # ifndef PNG_iCCP_SUPPORTED
841 # define PNG_iCCP_SUPPORTED
844 #ifndef PNG_NO_WRITE_iTXt
845 # define PNG_WRITE_iTXt_SUPPORTED
846 # ifndef PNG_iTXt_SUPPORTED
847 # define PNG_iTXt_SUPPORTED
850 #ifndef PNG_NO_WRITE_oFFs
851 # define PNG_WRITE_oFFs_SUPPORTED
852 # ifndef PNG_oFFs_SUPPORTED
853 # define PNG_oFFs_SUPPORTED
856 #ifndef PNG_NO_WRITE_pCAL
857 # define PNG_WRITE_pCAL_SUPPORTED
858 # ifndef PNG_pCAL_SUPPORTED
859 # define PNG_pCAL_SUPPORTED
862 #ifndef PNG_NO_WRITE_sCAL
863 # define PNG_WRITE_sCAL_SUPPORTED
864 # ifndef PNG_sCAL_SUPPORTED
865 # define PNG_sCAL_SUPPORTED
868 #ifndef PNG_NO_WRITE_pHYs
869 # define PNG_WRITE_pHYs_SUPPORTED
870 # ifndef PNG_pHYs_SUPPORTED
871 # define PNG_pHYs_SUPPORTED
874 #ifndef PNG_NO_WRITE_sBIT
875 # define PNG_WRITE_sBIT_SUPPORTED
876 # ifndef PNG_sBIT_SUPPORTED
877 # define PNG_sBIT_SUPPORTED
880 #ifndef PNG_NO_WRITE_sPLT
881 # define PNG_WRITE_sPLT_SUPPORTED
882 # ifndef PNG_sPLT_SUPPORTED
883 # define PNG_sPLT_SUPPORTED
886 #ifndef PNG_NO_WRITE_sRGB
887 # define PNG_WRITE_sRGB_SUPPORTED
888 # ifndef PNG_sRGB_SUPPORTED
889 # define PNG_sRGB_SUPPORTED
892 #ifndef PNG_NO_WRITE_tEXt
893 # define PNG_WRITE_tEXt_SUPPORTED
894 # ifndef PNG_tEXt_SUPPORTED
895 # define PNG_tEXt_SUPPORTED
898 #ifndef PNG_NO_WRITE_tIME
899 # define PNG_WRITE_tIME_SUPPORTED
900 # ifndef PNG_tIME_SUPPORTED
901 # define PNG_tIME_SUPPORTED
904 #ifndef PNG_NO_WRITE_tRNS
905 # define PNG_WRITE_tRNS_SUPPORTED
906 # ifndef PNG_tRNS_SUPPORTED
907 # define PNG_tRNS_SUPPORTED
910 #ifndef PNG_NO_WRITE_zTXt
911 # define PNG_WRITE_zTXt_SUPPORTED
912 # ifndef PNG_zTXt_SUPPORTED
913 # define PNG_zTXt_SUPPORTED
916 #ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS
917 # define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
918 # ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
919 # define PNG_UNKNOWN_CHUNKS_SUPPORTED
921 # ifndef PNG_NO_HANDLE_AS_UNKNOWN
922 # ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
923 # define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
927 #if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
928 defined(PNG_WRITE_zTXt_SUPPORTED)
929 # define PNG_WRITE_TEXT_SUPPORTED
930 # ifndef PNG_TEXT_SUPPORTED
931 # define PNG_TEXT_SUPPORTED
935 #endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */
937 /* Turn this off to disable png_read_png() and
938 * png_write_png() and leave the row_pointers member
939 * out of the info structure.
941 #ifndef PNG_NO_INFO_IMAGE
942 # define PNG_INFO_IMAGE_SUPPORTED
945 /* need the time information for reading tIME chunks */
946 #if defined(PNG_tIME_SUPPORTED)
947 # if !defined(_WIN32_WCE)
948 /* "time.h" functions are not supported on WindowsCE */
953 /* Some typedefs to get us started. These should be safe on most of the
954 * common platforms. The typedefs should be at least as large as the
955 * numbers suggest (a png_uint_32 must be at least 32 bits long), but they
956 * don't have to be exactly that size. Some compilers dislike passing
957 * unsigned shorts as function parameters, so you may be better off using
958 * unsigned int for png_uint_16. Likewise, for 64-bit systems, you may
959 * want to have unsigned int for png_uint_32 instead of unsigned long.
962 typedef unsigned long png_uint_32;
963 typedef long png_int_32;
964 typedef unsigned short png_uint_16;
965 typedef short png_int_16;
966 typedef unsigned char png_byte;
968 /* This is usually size_t. It is typedef'ed just in case you need it to
969 change (I'm not sure if you will or not, so I thought I'd be safe) */
970 typedef size_t png_size_t;
972 /* The following is needed for medium model support. It cannot be in the
973 * PNG_INTERNAL section. Needs modification for other compilers besides
974 * MSC. Model independent support declares all arrays and pointers to be
975 * large using the far keyword. The zlib version used must also support
976 * model independent data. As of version zlib 1.0.4, the necessary changes
977 * have been made in zlib. The USE_FAR_KEYWORD define triggers other
978 * changes that are needed. (Tim Wegner)
981 /* Separate compiler dependencies (problem here is that zlib.h always
982 defines FAR. (SJT) */
984 # if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)
989 /* GRR: why is Cygwin in here? Cygwin is not Borland C... */
990 # if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)
991 # define PNG_MAX_MALLOC_64K
996 # define USE_FAR_KEYWORD
997 # endif /* LDATA != 1 */
998 /* Possibly useful for moving data out of default segment.
999 * Uncomment it if you want. Could also define FARDATA as
1000 * const if your compiler supports it. (SJT)
1001 # define FARDATA FAR
1003 # endif /* __WIN32__, __FLAT__, __CYGWIN__ */
1004 #endif /* __BORLANDC__ */
1007 /* Suggest testing for specific compiler first before testing for
1008 * FAR. The Watcom compiler defines both __MEDIUM__ and M_I86MM,
1009 * making reliance oncertain keywords suspect. (SJT)
1012 /* MSC Medium model */
1014 # if defined(M_I86MM)
1015 # define USE_FAR_KEYWORD
1016 # define FARDATA FAR
1021 /* SJT: default case */
1026 /* At this point FAR is always defined */
1031 /* Typedef for floating-point numbers that are converted
1032 to fixed-point with a multiple of 100,000, e.g., int_gamma */
1033 typedef png_int_32 png_fixed_point;
1035 /* Add typedefs for pointers */
1036 typedef void FAR * png_voidp;
1037 typedef png_byte FAR * png_bytep;
1038 typedef png_uint_32 FAR * png_uint_32p;
1039 typedef png_int_32 FAR * png_int_32p;
1040 typedef png_uint_16 FAR * png_uint_16p;
1041 typedef png_int_16 FAR * png_int_16p;
1042 typedef PNG_CONST char FAR * png_const_charp;
1043 typedef char FAR * png_charp;
1044 typedef png_fixed_point FAR * png_fixed_point_p;
1046 #ifndef PNG_NO_STDIO
1047 #if defined(_WIN32_WCE)
1048 typedef HANDLE png_FILE_p;
1050 typedef FILE * png_FILE_p;
1054 #ifdef PNG_FLOATING_POINT_SUPPORTED
1055 typedef double FAR * png_doublep;
1058 /* Pointers to pointers; i.e. arrays */
1059 typedef png_byte FAR * FAR * png_bytepp;
1060 typedef png_uint_32 FAR * FAR * png_uint_32pp;
1061 typedef png_int_32 FAR * FAR * png_int_32pp;
1062 typedef png_uint_16 FAR * FAR * png_uint_16pp;
1063 typedef png_int_16 FAR * FAR * png_int_16pp;
1064 typedef PNG_CONST char FAR * FAR * png_const_charpp;
1065 typedef char FAR * FAR * png_charpp;
1066 typedef png_fixed_point FAR * FAR * png_fixed_point_pp;
1067 #ifdef PNG_FLOATING_POINT_SUPPORTED
1068 typedef double FAR * FAR * png_doublepp;
1071 /* Pointers to pointers to pointers; i.e., pointer to array */
1072 typedef char FAR * FAR * FAR * png_charppp;
1074 /* libpng typedefs for types in zlib. If zlib changes
1075 * or another compression library is used, then change these.
1076 * Eliminates need to change all the source files.
1078 typedef charf * png_zcharp;
1079 typedef charf * FAR * png_zcharpp;
1080 typedef z_stream FAR * png_zstreamp;
1083 * Define PNG_BUILD_DLL if the module being built is a Windows
1086 * Define PNG_USE_DLL if you want to *link* to the Windows LIBPNG DLL.
1087 * It is equivalent to Microsoft predefined macro _DLL that is
1088 * automatically defined when you compile using the share
1089 * version of the CRT (C Run-Time library)
1091 * The cygwin mods make this behavior a little different:
1092 * Define PNG_BUILD_DLL if you are building a dll for use with cygwin
1093 * Define PNG_STATIC if you are building a static library for use with cygwin,
1094 * -or- if you are building an application that you want to link to the
1096 * PNG_USE_DLL is defined by default (no user action needed) unless one of
1097 * the other flags is defined.
1100 #if !defined(PNG_DLL) && (defined(PNG_BUILD_DLL) || defined(PNG_USE_DLL))
1103 /* If CYGWIN, then disallow GLOBAL ARRAYS unless building a static lib.
1104 * When building a static lib, default to no GLOBAL ARRAYS, but allow
1105 * command-line override
1107 #if defined(__CYGWIN__)
1108 # if !defined(PNG_STATIC)
1109 # if defined(PNG_USE_GLOBAL_ARRAYS)
1110 # undef PNG_USE_GLOBAL_ARRAYS
1112 # if !defined(PNG_USE_LOCAL_ARRAYS)
1113 # define PNG_USE_LOCAL_ARRAYS
1116 # if defined(PNG_USE_LOCAL_ARRAYS) || defined(PNG_NO_GLOBAL_ARRAYS)
1117 # if defined(PNG_USE_GLOBAL_ARRAYS)
1118 # undef PNG_USE_GLOBAL_ARRAYS
1122 # if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1123 # define PNG_USE_LOCAL_ARRAYS
1127 /* Do not use global arrays (helps with building DLL's)
1128 * They are no longer used in libpng itself, since version 1.0.5c,
1129 * but might be required for some pre-1.0.5c applications.
1131 #if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1132 # if defined(PNG_NO_GLOBAL_ARRAYS) || (defined(__GNUC__) && defined(PNG_DLL))
1133 # define PNG_USE_LOCAL_ARRAYS
1135 # define PNG_USE_GLOBAL_ARRAYS
1142 #if defined(__MINGW32__) || defined(__CYGWIN__) && !defined(PNG_MODULEDEF)
1143 # ifndef PNG_NO_MODULEDEF
1144 # define PNG_NO_MODULEDEF
1148 #if !defined(PNG_IMPEXP) && defined(PNG_BUILD_DLL) && !defined(PNG_NO_MODULEDEF)
1152 #if defined(PNG_DLL) || defined(_DLL) || defined(__DLL__ ) || \
1153 (( defined(_Windows) || defined(_WINDOWS) || \
1154 defined(WIN32) || defined(_WIN32) || defined(__WIN32__) \
1155 ) && !defined(__CYGWIN__))
1157 # if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
1158 # define PNGAPI __cdecl
1160 # define PNGAPI _cdecl
1163 # if !defined(PNG_IMPEXP) && (!defined(PNG_DLL) || \
1164 0 /* WINCOMPILER_WITH_NO_SUPPORT_FOR_DECLIMPEXP */)
1168 # if !defined(PNG_IMPEXP)
1170 # define PNG_EXPORT_TYPE1(type,symbol) PNG_IMPEXP type PNGAPI symbol
1171 # define PNG_EXPORT_TYPE2(type,symbol) type PNG_IMPEXP PNGAPI symbol
1173 /* Borland/Microsoft */
1174 # if defined(_MSC_VER) || defined(__BORLANDC__)
1175 # if (_MSC_VER >= 800) || (__BORLANDC__ >= 0x500)
1176 # define PNG_EXPORT PNG_EXPORT_TYPE1
1178 # define PNG_EXPORT PNG_EXPORT_TYPE2
1179 # if defined(PNG_BUILD_DLL)
1180 # define PNG_IMPEXP __export
1182 # define PNG_IMPEXP /*__import*/ /* doesn't exist AFAIK in
1184 # endif /* Exists in Borland C++ for
1185 C++ classes (== huge) */
1189 # if !defined(PNG_IMPEXP)
1190 # if defined(PNG_BUILD_DLL)
1191 # define PNG_IMPEXP __declspec(dllexport)
1193 # define PNG_IMPEXP __declspec(dllimport)
1196 # endif /* PNG_IMPEXP */
1197 #else /* !(DLL || non-cygwin WINDOWS) */
1198 # if defined(__CYGWIN__) && !defined(PNG_DLL)
1199 # if !defined(PNG_IMPEXP)
1202 # define PNGAPI __cdecl
1204 # if (defined(__IBMC__) || defined(IBMCPP__)) && defined(__OS2__)
1205 # define PNGAPI _System
1208 # if 0 /* ... other platforms, with other meanings */
1226 # define PNG_EXPORT(type,symbol) PNG_IMPEXP type PNGAPI symbol
1229 #ifdef PNG_USE_GLOBAL_ARRAYS
1230 # ifndef PNG_EXPORT_VAR
1231 # define PNG_EXPORT_VAR(type) extern PNG_IMPEXP type
1235 /* User may want to use these so they are not in PNG_INTERNAL. Any library
1236 * functions that are passed far data must be model independent.
1240 # define PNG_ABORT() abort()
1243 #ifdef PNG_SETJMP_SUPPORTED
1244 # define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf)
1246 # define png_jmpbuf(png_ptr) \
1247 (LIBPNG_WAS_COMPILED_WITH__PNG_SETJMP_NOT_SUPPORTED)
1250 #if defined(USE_FAR_KEYWORD) /* memory model independent fns */
1251 /* use this to make far-to-near assignments */
1254 # define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK))
1255 # define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK))
1256 # define png_strcpy _fstrcpy
1257 # define png_strlen _fstrlen
1258 # define png_memcmp _fmemcmp /* SJT: added */
1259 # define png_memcpy _fmemcpy
1260 # define png_memset _fmemset
1261 #else /* use the usual functions */
1262 # define CVT_PTR(ptr) (ptr)
1263 # define CVT_PTR_NOCHECK(ptr) (ptr)
1264 # define png_strcpy strcpy
1265 # define png_strlen strlen
1266 # define png_memcmp memcmp /* SJT: added */
1267 # define png_memcpy memcpy
1268 # define png_memset memset
1270 /* End of memory model independent support */
1272 /* Just a little check that someone hasn't tried to define something
1275 #if (PNG_ZBUF_SIZE > 65536) && defined(PNG_MAX_MALLOC_64K)
1276 # undef PNG_ZBUF_SIZE
1277 # define PNG_ZBUF_SIZE 65536
1280 #ifdef PNG_READ_SUPPORTED
1281 /* Prior to libpng-1.0.9, this block was in pngasmrd.h */
1282 #if defined(PNG_INTERNAL)
1284 /* These are the default thresholds before the MMX code kicks in; if either
1285 * rowbytes or bitdepth is below the threshold, plain C code is used. These
1286 * can be overridden at runtime via the png_set_mmx_thresholds() call in
1287 * libpng 1.2.0 and later. The values below were chosen by Intel.
1290 #ifndef PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT
1291 # define PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT 128 /* >= */
1293 #ifndef PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT
1294 # define PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT 9 /* >= */
1297 /* Set this in the makefile for VC++ on Pentium, not here. */
1298 /* Platform must be Pentium. Makefile must assemble and load pngvcrd.c .
1299 * MMX will be detected at run time and used if present.
1301 #ifdef PNG_USE_PNGVCRD
1302 # define PNG_HAVE_ASSEMBLER_COMBINE_ROW
1303 # define PNG_HAVE_ASSEMBLER_READ_INTERLACE
1304 # define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
1307 /* Set this in the makefile for gcc/as on Pentium, not here. */
1308 /* Platform must be Pentium. Makefile must assemble and load pnggccrd.c .
1309 * MMX will be detected at run time and used if present.
1311 #ifdef PNG_USE_PNGGCCRD
1312 # define PNG_HAVE_ASSEMBLER_COMBINE_ROW
1313 # define PNG_HAVE_ASSEMBLER_READ_INTERLACE
1314 # define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
1316 /* - see pnggccrd.c for info about what is currently enabled */
1318 #endif /* PNG_INTERNAL */
1319 #endif /* PNG_READ_SUPPORTED */
1321 #endif /* PNGCONF_H */