mirror of
https://git.code.sf.net/p/libpng/code.git
synced 2025-07-10 18:04:09 +02:00
Imported from libpng-0.96.tar
This commit is contained in:
Andreas Dilger
committed by
Glenn Randers-Pehrson
Glenn Randers-Pehrson
parent
02ad0efbc8
commit
47a0c422ca
205
pngconf.h
205
pngconf.h
@@ -1,10 +1,11 @@
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/* pngconf.c - machine configurable file for libpng
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libpng 1.0 beta 4 - version 0.90
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libpng 1.0 beta 6 - version 0.96
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For conditions of distribution and use, see copyright notice in png.h
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Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
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December 3, 1996
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Copyright (c) 1996, 1997 Andreas Dilger
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May 12, 1997
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*/
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/* Any machine specific code is near the front of this file, so if you
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@@ -29,16 +30,16 @@
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#define PNG_ZBUF_SIZE 8192
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/* If you are running on a machine where you cannot allocate more then
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64K of memory, uncomment this. While libpng will not normally need
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that much memory in a chunk (unless you load up a very large file),
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zlib needs to know how big of a chunk it can use, and libpng thus
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makes sure to check any memory allocation to verify it will fit
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into memory.
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#define PNG_MAX_ALLOC_64K
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/* If you are running on a machine where you cannot allocate more
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than 64K of memory at once, uncomment this. While libpng will not
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normally need that much memory in a chunk (unless you load up a very
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large file), zlib needs to know how big of a chunk it can use, and
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libpng thus makes sure to check any memory allocation to verify it
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will fit into memory.
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#define PNG_MAX_MALLOC_64K
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*/
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#ifdef MAXSEG_64K
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#define PNG_MAX_ALLOC_64K
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#if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
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#define PNG_MAX_MALLOC_64K
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#endif
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/* This protects us against compilers which run on a windowing system
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@@ -56,12 +57,13 @@
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/* This macro protects us against machines that don't have function
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prototypes (ie K&R style headers). If your compiler does not handle
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function prototypes, define this macro. I've always been able to use
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_NO_PROTO as the indicator, but you may need to drag the empty declaration
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out in front of here, or change the ifdef to suit your own needs. */
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function prototypes, define this macro and use the included ansi2knr.
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I've always been able to use _NO_PROTO as the indicator, but you may
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need to drag the empty declaration out in front of here, or change the
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ifdef to suit your own needs. */
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#ifndef PNGARG
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#ifdef OF /* Zlib prototype munger */
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#ifdef OF /* zlib prototype munger */
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#define PNGARG(arglist) OF(arglist)
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#else
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@@ -85,17 +87,16 @@
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#include <sys/types.h>
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#endif
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/* need the time information for reading tIME chunks */
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#include <time.h>
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/* This is an attempt to force a single setjmp behaviour on Linux */
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/* This is an attempt to force a single setjmp behaviour on Linux. If
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the X config stuff didn't define _BSD_SOURCE we wouldn't need this. */
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#ifdef linux
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#ifdef _BSD_SOURCE
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#define _PNG_SAVE_BSD_SOURCE
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#undef _BSD_SOURCE
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#endif
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#ifdef _SETJMP_H
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error: png.h already includes setjmp.h
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#error __png_h_already_includes_setjmp_h__
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#error __dont_include_it_again__
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#endif
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#endif /* linux */
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@@ -115,25 +116,39 @@ error: png.h already includes setjmp.h
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#include <string.h>
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#endif
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/* Other defines for things like memory and the like can go here. These
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are the only files included in libpng, so if you need to change them,
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change them here. They are only included if PNG_INTERNAL is defined. */
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/* Other defines for things like memory and the like can go here. */
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#ifdef PNG_INTERNAL
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#include <stdlib.h>
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/* Where do we need this???
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#include <ctype.h>
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*/
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/* The functions exported by PNG_EXTERN are PNG_INTERNAL functions, which
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* aren't usually used outside the library (as far as I know), so it is
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* debatable if they should be exported at all. In the future, when it is
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* possible to have run-time registry of chunk-handling functions, some of
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* these will be made available again.
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#define PNG_EXTERN extern
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*/
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#define PNG_EXTERN
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/* Other defines specific to compilers can go here. Try to keep
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them inside an appropriate ifdef/endif pair for portability */
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#ifdef MACOS
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#if defined(MACOS)
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/* We need to check that <math.h> hasn't already been included earlier
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as it seems it doesn't agree with <fp.h>, yet we should really use
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<fp.h> if possible. */
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#if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__)
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#include <fp.h>
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#endif
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#else
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#include <math.h>
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#endif
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/* For some reason, Borland C++ defines memcmp, etc. in mem.h, not
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stdlib.h like it should (I think). Or perhaps this is a C++
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feature? */
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"feature"? */
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#ifdef __TURBOC__
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#include <mem.h>
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#include "alloc.h"
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@@ -159,6 +174,10 @@ error: png.h already includes setjmp.h
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#define PNG_MAX_GAMMA_8 11
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/* This controls how much a difference in gamma we can tolerate before
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we actually start doing gamma conversion. */
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#define PNG_GAMMA_THRESHOLD 0.05
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#endif /* PNG_INTERNAL */
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/* The following uses const char * instead of char * for error
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@@ -167,8 +186,7 @@ error: png.h already includes setjmp.h
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normally defined to make configuration easier, as it is not a
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critical part of the code.
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*/
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#define PNG_USE_CONST
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#undef PNG_USE_CONST
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#ifdef PNG_USE_CONST
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# define PNG_CONST const
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@@ -191,12 +209,14 @@ error: png.h already includes setjmp.h
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/* Any transformations you will not be using can be undef'ed here */
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#define PNG_PROGRESSIVE_READ_SUPPORTED
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#define PNG_READ_OPT_PLTE_SUPPORTED
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#define PNG_READ_INTERLACING_SUPPORTED
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#define PNG_READ_EXPAND_SUPPORTED
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#define PNG_READ_SHIFT_SUPPORTED
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#define PNG_READ_PACK_SUPPORTED
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#define PNG_READ_BGR_SUPPORTED
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#define PNG_READ_SWAP_SUPPORTED
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#define PNG_READ_PACKSWAP_SUPPORTED
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#define PNG_READ_INVERT_SUPPORTED
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#define PNG_READ_DITHER_SUPPORTED
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#define PNG_READ_BACKGROUND_SUPPORTED
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@@ -204,55 +224,79 @@ error: png.h already includes setjmp.h
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#define PNG_READ_FILLER_SUPPORTED
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#define PNG_READ_GAMMA_SUPPORTED
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#define PNG_READ_GRAY_TO_RGB_SUPPORTED
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#define PNG_READ_SWAP_ALPHA_SUPPORTED
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#define PNG_READ_STRIP_ALPHA_SUPPORTED
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#define PNG_WRITE_INTERLACING_SUPPORTED
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#define PNG_WRITE_SHIFT_SUPPORTED
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#define PNG_WRITE_PACK_SUPPORTED
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#define PNG_WRITE_BGR_SUPPORTED
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#define PNG_WRITE_SWAP_SUPPORTED
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#define PNG_WRITE_PACKSWAP_SUPPORTED
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#define PNG_WRITE_INVERT_SUPPORTED
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#define PNG_WRITE_FILLER_SUPPORTED
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#define PNG_WRITE_FILLER_SUPPORTED /* This is the same as WRITE_STRIP_ALPHA */
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#define PNG_WRITE_FLUSH_SUPPORTED
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#define PNG_WRITE_SWAP_ALPHA_SUPPORTED
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#define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
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/* These are currently experimental features */
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#undef PNG_READ_16_TO_8_ACCURATE_SHIFT_SUPPORTED /* very little testing */
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#undef PNG_READ_COMPOSITE_NODIV_SUPPORTED /* very little testing */
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/* This is only for PowerPC big-endian and 680x0 systems */
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#undef PNG_READ_BIG_ENDIAN_SUPPORTED /* some testing */
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/* These functions are turned off by default, as they will be phased out. */
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#undef PNG_USE_OWN_CRC
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#undef PNG_USELESS_TESTS_SUPPORTED
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#undef PNG_CORRECT_PALETTE_SUPPORTED
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/* any chunks you are not interested in, you can undef here. The
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ones that allocate memory may be expecially important (hIST,
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tEXt, zTXt, tRNS) Others will just save time and make png_info
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smaller. OPT_PLTE only disables the optional palette in RGB
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and RGB Alpha images. */
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/* Any chunks you are not interested in, you can undef here. The
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* ones that allocate memory may be expecially important (hIST,
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* tEXt, zTXt, tRNS, pCAL). Others will just save time and make png_info
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* a bit smaller. OPT_PLTE only disables the optional palette in RGB
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* and RGBA images.
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*/
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#define PNG_READ_gAMA_SUPPORTED
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#define PNG_READ_sBIT_SUPPORTED
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#define PNG_READ_cHRM_SUPPORTED
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#define PNG_READ_tRNS_SUPPORTED
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#define PNG_READ_bKGD_SUPPORTED
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#define PNG_READ_cHRM_SUPPORTED
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#define PNG_READ_gAMA_SUPPORTED
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#define PNG_READ_hIST_SUPPORTED
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#define PNG_READ_pHYs_SUPPORTED
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#define PNG_READ_oFFs_SUPPORTED
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#define PNG_READ_tIME_SUPPORTED
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#define PNG_READ_pCAL_SUPPORTED
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#define PNG_READ_pHYs_SUPPORTED
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#define PNG_READ_sBIT_SUPPORTED
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#define PNG_READ_tEXt_SUPPORTED
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#define PNG_READ_tIME_SUPPORTED
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#define PNG_READ_tRNS_SUPPORTED
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#define PNG_READ_zTXt_SUPPORTED
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#define PNG_READ_OPT_PLTE_SUPPORTED
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#define PNG_WRITE_gAMA_SUPPORTED
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#define PNG_WRITE_sBIT_SUPPORTED
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#define PNG_WRITE_cHRM_SUPPORTED
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#define PNG_WRITE_tRNS_SUPPORTED
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#define PNG_WRITE_bKGD_SUPPORTED
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#define PNG_WRITE_cHRM_SUPPORTED
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#define PNG_WRITE_gAMA_SUPPORTED
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#define PNG_WRITE_hIST_SUPPORTED
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#define PNG_WRITE_pHYs_SUPPORTED
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#define PNG_WRITE_oFFs_SUPPORTED
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#define PNG_WRITE_tIME_SUPPORTED
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#define PNG_WRITE_pCAL_SUPPORTED
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#define PNG_WRITE_pHYs_SUPPORTED
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#define PNG_WRITE_sBIT_SUPPORTED
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#define PNG_WRITE_tEXt_SUPPORTED
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#define PNG_WRITE_tIME_SUPPORTED
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#define PNG_WRITE_tRNS_SUPPORTED
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#define PNG_WRITE_zTXt_SUPPORTED
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/* need the time information for reading tIME chunks */
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#if defined(PNG_READ_tIME_SUPPORTED) || defined(PNG_WRITE_tIME_SUPPORTED)
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#include <time.h>
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#endif
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/* Some typedefs to get us started. These should be safe on most of the
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common platforms. The typedefs should be at least as large as the
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numbers suggest (a png_uint_32 must be at least 32 bits long), but they
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don't have to be exactly that size. */
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* common platforms. The typedefs should be at least as large as the
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* numbers suggest (a png_uint_32 must be at least 32 bits long), but they
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* don't have to be exactly that size. Some compilers dislike passing
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* unsigned shorts as function parameters, so you may be better off using
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* unsigned int for png_uint_16. Likewise, for 64-bit systems, you may
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* want to have unsigned int for png_uint_32 instead of unsigned long.
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*/
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typedef unsigned long png_uint_32;
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typedef long png_int_32;
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@@ -264,14 +308,14 @@ typedef unsigned char png_byte;
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change (I'm not sure if you will or not, so I thought I'd be safe) */
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typedef size_t png_size_t;
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/* The following is needed for medium model support. It cannot be in the
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PNG_INTERNAL section. Needs modification for other compilers besides
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MSC. Model independent support declares all arrays that might be very
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large using the far keyword. The Zlib version used must also support
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model independent data. As of version Zlib .95, the necessary changes
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have been made in Zlib. The USE_FAR_KEYWORD define triggers other
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changes that are needed. Most of the far keyword changes are hidden
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inside typedefs with suffix "f". (Tim Wegner) */
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/* The following is needed for medium model support. It cannot be in the
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* PNG_INTERNAL section. Needs modification for other compilers besides
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* MSC. Model independent support declares all arrays and pointers to be
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* large using the far keyword. The zlib version used must also support
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* model independent data. As of version zlib 1.0.4, the necessary changes
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* have been made in zlib. The USE_FAR_KEYWORD define triggers other
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* changes that are needed. (Tim Wegner)
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*/
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/* Separate compiler dependencies (problem here is that zlib.h always
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defines FAR. (SJT) */
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@@ -319,17 +363,12 @@ typedef size_t png_size_t;
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# define FAR
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#endif
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/* SJT: At this point FAR is always defined */
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/* SJT: */
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/* At this point FAR is always defined */
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#ifndef FARDATA
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#define FARDATA
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#endif
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/* Not used anymore (as of 0.88), but kept for compatability (for now). */
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typedef unsigned char FAR png_bytef;
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/* SJT: Add typedefs for pointers */
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/* Add typedefs for pointers */
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typedef void FAR * png_voidp;
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typedef png_byte FAR * png_bytep;
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typedef png_uint_32 FAR * png_uint_32p;
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@@ -338,8 +377,9 @@ typedef png_uint_16 FAR * png_uint_16p;
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typedef png_int_16 FAR * png_int_16p;
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typedef PNG_CONST char FAR * png_const_charp;
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typedef char FAR * png_charp;
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typedef double FAR * png_doublep;
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/* SJT: Pointers to pointers; i.e. arrays */
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/* Pointers to pointers; i.e. arrays */
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typedef png_byte FAR * FAR * png_bytepp;
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typedef png_uint_32 FAR * FAR * png_uint_32pp;
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typedef png_int_32 FAR * FAR * png_int_32pp;
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@@ -347,16 +387,29 @@ typedef png_uint_16 FAR * FAR * png_uint_16pp;
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typedef png_int_16 FAR * FAR * png_int_16pp;
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typedef PNG_CONST char FAR * FAR * png_const_charpp;
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typedef char FAR * FAR * png_charpp;
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typedef double FAR * FAR * png_doublepp;
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/* Pointers to pointers to pointers; i.e. pointer to array */
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typedef char FAR * FAR * FAR * png_charppp;
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/* SJT: libpng typedefs for types in zlib. If Zlib changes
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or another compression library is used, then change these.
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Eliminates need to change all the source files.
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*/
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/* libpng typedefs for types in zlib. If zlib changes
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* or another compression library is used, then change these.
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* Eliminates need to change all the source files.
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*/
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typedef charf * png_zcharp;
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typedef charf * FAR * png_zcharpp;
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typedef z_stream FAR * png_zstreamp;
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/* allow for compilation as dll under windows */
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#ifdef __WIN32DLL__
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#define PNG_EXPORT(type,symbol) __declspec(dllexport) type symbol
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#endif
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#ifndef PNG_EXPORT
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#define PNG_EXPORT(t,s) t s
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#endif
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/* User may want to use these so not in PNG_INTERNAL. Any library functions
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that are passed far data must be model independent. */
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@@ -366,25 +419,27 @@ typedef z_stream FAR * png_zstreamp;
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# define NOCHECK 0
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# define CVT_PTR(ptr) (far_to_near(png_ptr,ptr,CHECK))
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# define CVT_PTR_NOCHECK(ptr) (far_to_near(png_ptr,ptr,NOCHECK))
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# define png_strcpy _fstrcpy
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# define png_strcat _fstrcat
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# define png_strlen _fstrlen
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# define png_strcmp _fstrcmp
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# define png_memcmp _fmemcmp /* SJT: added */
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# define png_memcpy _fmemcpy
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# define png_memset _fmemset
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#else /* use the usual functions */
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# define CVT_PTR(ptr) (ptr)
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# define CVT_PTR_NOCHECK(ptr) (ptr)
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# define png_strcpy strcpy
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# define png_strcat strcat
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# define png_strlen strlen
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# define png_strcmp strcmp
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# define png_memcmp memcmp /* SJT: added */
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# define png_memcpy memcpy
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# define png_memset memset
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#endif
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/* End of memory model independent support */
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/* Just a double check that someone hasn't tried to define something
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* contradictory.
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*/
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#if (PNG_ZBUF_SIZE > 65536) && defined(PNG_MAX_MALLOC_64K)
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#undef PNG_ZBUF_SIZE
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#define PNG_ZBUF_SIZE 65536
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#endif
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#endif /* PNGCONF_H */
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