mirror of
https://git.code.sf.net/p/libpng/code.git
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Imported from libpng-0.90.tar
This commit is contained in:
Andreas Dilger
committed by
Glenn Randers-Pehrson
Glenn Randers-Pehrson
parent
c21f90c334
commit
02ad0efbc8
170
pngconf.h
170
pngconf.h
@@ -1,10 +1,10 @@
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/* pngconf.c - machine configurable file for libpng
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libpng 1.0 beta 3 - version 0.89
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libpng 1.0 beta 4 - version 0.90
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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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May 25, 1996
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December 3, 1996
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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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@@ -15,7 +15,7 @@
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#ifndef PNGCONF_H
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#define PNGCONF_H
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/* this is the size of the compression buffer, and thus the size of
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/* This is the size of the compression buffer, and thus the size of
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an IDAT chunk. Make this whatever size you feel is best for your
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machine. One of these will be allocated per png_struct. When this
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is full, it writes the data to the disk, and does some other
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@@ -29,14 +29,7 @@
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#define PNG_ZBUF_SIZE 8192
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/* While libpng currently uses zlib for it's compression, it has been designed
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to stand on it's own. Towards this end, there are two defines that are
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used to help portability between machines. To make it simpler to
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setup libpng on a machine, this currently uses zlib's definitions, so
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any changes should be made in zlib. Libpng will check zlib's settings
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and adjust it's own accordingly. */
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/* if you are running on a machine where you cannot allocate more then
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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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@@ -48,7 +41,7 @@
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#define PNG_MAX_ALLOC_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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/* This protects us against compilers which run on a windowing system
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and thus don't have or would rather us not use the stdio types:
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stdin, stdout, and stderr. The only one currently used is stderr
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in png_error() and png_warning(). #defining PNG_NO_STDIO will
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@@ -56,14 +49,19 @@
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/* #define PNG_NO_STDIO */
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/* this macro protects us against machines that don't have function
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prototypes. If your compiler does not handle function prototypes,
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define this macro. I've always been able to use _NO_PROTO as the
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indicator, but you may need to drag the empty declaration out in
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front of here, or change the ifdef to suit your own needs. */
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/* for FILE. If you are not using standard io, you don't need this */
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#ifndef PNG_NO_STDIO
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#include <stdio.h>
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#endif
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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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#ifndef PNGARG
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#ifdef OF
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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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@@ -77,39 +75,65 @@
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#endif /* PNGARG */
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/* Try to determine if we are compiling on a Mac */
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#if defined(__MWERKS__) ||defined(applec) ||defined(THINK_C) ||defined(__SC__)
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#define MACOS
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#endif
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/* enough people need this for various reasons to include it here */
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#if !defined(MACOS) && !defined(RISCOS)
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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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/* for FILE. If you are not using standard io, you don't need this */
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#include <stdio.h>
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/* This is an attempt to force a single setjmp behaviour on Linux */
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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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#endif
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#endif /* linux */
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/* include setjmp.h for error handling */
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#include <setjmp.h>
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#ifdef linux
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#ifdef _PNG_SAVE_BSD_SOURCE
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#define _BSD_SOURCE
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#undef _PNG_SAVE_BSD_SOURCE
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#endif
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#endif /* linux */
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#ifdef BSD
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#include <strings.h>
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#else
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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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/* 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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#ifdef PNG_INTERNAL
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#include <stdlib.h>
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#include <ctype.h>
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#include <math.h>
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/* other defines specific to compilers can go here. Try to keep
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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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/* for some reason, Borland C++ defines memcmp, etc. in mem.h, not
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#ifdef MACOS
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#include <fp.h>
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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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@@ -119,17 +143,17 @@
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#include <malloc.h>
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#endif
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/* this controls how fine the dithering gets. As this allocates
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/* This controls how fine the dithering gets. As this allocates
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a largish chunk of memory (32K), those who are not as concerned
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with dithering quality can decrease some or all of these */
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with dithering quality can decrease some or all of these. */
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#define PNG_DITHER_RED_BITS 5
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#define PNG_DITHER_GREEN_BITS 5
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#define PNG_DITHER_BLUE_BITS 5
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/* this controls how fine the gamma correction becomes when you
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/* This controls how fine the gamma correction becomes when you
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are only interested in 8 bits anyway. Increasing this value
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results in more memory being used, and more pow() functions
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being called to fill in the gamma tables. Don't get this
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being called to fill in the gamma tables. Don't set this
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value less then 8, and even that may not work (I haven't tested
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it). */
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@@ -137,32 +161,33 @@
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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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/* The following uses const char * instead of char * for error
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and warning message functions, so some compilers won't complain.
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If you want to use const, define PNG_USE_CONST here. It is not
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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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#ifdef PNG_USE_CONST
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# define PNG_CONST const
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#else
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# define PNG_CONST
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#endif
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/* The following defines give you the ability to remove code
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from the library that you will not be using. I wish I
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could figure out how to automate this, but I can't do
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that without making it seriously hard on the users. So
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if you are not using an ability, change the #define to
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and #undef, and that part of the library will not be
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compiled. If your linker can't find a function, you
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may want to make sure the ability is defined here.
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Some of these depend upon some others being defined.
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I haven't figured out all the interactions here, so
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you may have to experiment awhile to get everything
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to compile.
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*/
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/* The following defines give you the ability to remove code from the
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library that you will not be using. I wish I could figure out how to
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automate this, but I can't do that without making it seriously hard
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on the users. So if you are not using an ability, change the #define
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to and #undef, and that part of the library will not be compiled. If
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your linker can't find a function, you may want to make sure the
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ability is defined here. Some of these depend upon some others being
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defined. I haven't figured out all the interactions here, so you may
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have to experiment awhile to get everything to compile. If you are
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creating or using a shared library, you probably shouldn't touch this,
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as it will affect the size of the structures, and this will cause bad
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things to happen if the library and/or application ever change. */
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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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@@ -179,7 +204,6 @@
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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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#undef PNG_CORRECT_PALETTE_SUPPORTED
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#define PNG_WRITE_INTERLACING_SUPPORTED
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#define PNG_WRITE_SHIFT_SUPPORTED
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@@ -190,6 +214,10 @@
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#define PNG_WRITE_FILLER_SUPPORTED
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#define PNG_WRITE_FLUSH_SUPPORTED
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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_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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@@ -221,10 +249,10 @@
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#define PNG_WRITE_tEXt_SUPPORTED
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#define PNG_WRITE_zTXt_SUPPORTED
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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
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as the numbers suggest (a png_uint_32 must be at least 32 bits long),
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but they don't have to be exactly that size. */
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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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typedef unsigned long png_uint_32;
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typedef long png_int_32;
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@@ -232,7 +260,7 @@ typedef unsigned short png_uint_16;
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typedef short png_int_16;
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typedef unsigned char png_byte;
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/* this is usually size_t. it is typedef'ed just in case you need it to
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/* This is usually size_t. It is typedef'ed just in case you need it to
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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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@@ -243,10 +271,10 @@ typedef size_t png_size_t;
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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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inside typedefs with suffix "f". (Tim Wegner) */
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/* SJT: Separate compiler dependencies */
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/* SJT: problem here is that zlib.h always defines FAR */
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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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#ifdef __BORLANDC__
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#if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)
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#define LDATA 1
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@@ -263,9 +291,9 @@ typedef size_t png_size_t;
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#define USE_FAR_KEYWORD
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#endif /* LDATA != 1 */
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/* SJT: Possibly useful for moving data out of default segment.
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Uncomment it if you want. Could also define FARDATA as const
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if your compiler supports it.
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/* Possibly useful for moving data out of default segment.
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Uncomment it if you want. Could also define FARDATA as
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const if your compiler supports it. (SJT)
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# define FARDATA FAR
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*/
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#endif /* __WIN32__, __FLAT__ */
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@@ -273,16 +301,16 @@ typedef size_t png_size_t;
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#endif /* __BORLANDC__ */
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/* SJT: Suggest testing for specific compiler first before
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testing for FAR. The Watcom compiler defines both __MEDIUM__
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and M_I86MM, making reliance oncertain keywords suspect
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*/
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/* Suggest testing for specific compiler first before testing for
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FAR. The Watcom compiler defines both __MEDIUM__ and M_I86MM,
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making reliance oncertain keywords suspect. (SJT) */
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/* MSC Medium model */
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#if defined(FAR)
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# if defined(M_I86MM)
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# define USE_FAR_KEYWORD
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# define FARDATA FAR /* SJT: added */
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# define FARDATA FAR
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# include <dos.h>
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# endif
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#endif
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@@ -293,21 +321,16 @@ typedef size_t png_size_t;
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/* SJT: At this point FAR is always defined */
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/* not used anymore, but kept for compatability */
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typedef unsigned char FAR png_bytef;
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/* SJT: */
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#ifndef FARDATA
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#define FARDATA
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#endif
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/* End medium model changes to be in zconf.h */
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/* SJT: More typedefs */
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typedef void FAR * png_voidp;
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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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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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typedef png_int_32 FAR * png_int_32p;
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@@ -332,12 +355,17 @@ typedef char FAR * FAR * png_charpp;
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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 * png_zstreamp; /* zlib won't accept far z_stream */
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typedef z_stream FAR * png_zstreamp;
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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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#if defined(USE_FAR_KEYWORD) /* memory model independent fns */
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/* use this to make far-to-near assignments */
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# define CHECK 1
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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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@@ -346,6 +374,8 @@ typedef z_stream * png_zstreamp; /* zlib won't accept far z_stream */
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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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