+
/* pngconf.h - machine configurable file for libpng
*
- * libpng 1.2.5rc3 - September 18, 2002
- * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2002 Glenn Randers-Pehrson
+ * libpng version 1.5.7 - December 15, 2011
+ *
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ *
*/
/* Any machine specific code is near the front of this file, so if you
#ifndef PNGCONF_H
#define PNGCONF_H
-/* This is the size of the compression buffer, and thus the size of
- * an IDAT chunk. Make this whatever size you feel is best for your
- * machine. One of these will be allocated per png_struct. When this
- * is full, it writes the data to the disk, and does some other
- * calculations. Making this an extremely small size will slow
- * the library down, but you may want to experiment to determine
- * where it becomes significant, if you are concerned with memory
- * usage. Note that zlib allocates at least 32Kb also. For readers,
- * this describes the size of the buffer available to read the data in.
- * Unless this gets smaller than the size of a row (compressed),
- * it should not make much difference how big this is.
- */
-
-#ifndef PNG_ZBUF_SIZE
-# define PNG_ZBUF_SIZE 8192
-#endif
-
-/* Enable if you want a write-only libpng */
-
-#ifndef PNG_NO_READ_SUPPORTED
-# define PNG_READ_SUPPORTED
-#endif
-
-/* Enable if you want a read-only libpng */
-
-#ifndef PNG_NO_WRITE_SUPPORTED
-# define PNG_WRITE_SUPPORTED
+#ifdef __DMC__
+#define PNG_NO_SNPRINTF
#endif
-/* Enabled by default in 1.2.0. You can disable this if you don't need to
- support PNGs that are embedded in MNG datastreams */
-#if !defined(PNG_1_0_X) && !defined(PNG_NO_MNG_FEATURES)
-# ifndef PNG_MNG_FEATURES_SUPPORTED
-# define PNG_MNG_FEATURES_SUPPORTED
-# endif
-#endif
-
-#ifndef PNG_NO_FLOATING_POINT_SUPPORTED
-# ifndef PNG_FLOATING_POINT_SUPPORTED
-# define PNG_FLOATING_POINT_SUPPORTED
-# endif
-#endif
-
-/* If you are running on a machine where you cannot allocate more
- * than 64K of memory at once, uncomment this. While libpng will not
- * normally need that much memory in a chunk (unless you load up a very
- * large file), zlib needs to know how big of a chunk it can use, and
- * libpng thus makes sure to check any memory allocation to verify it
- * will fit into memory.
-#define PNG_MAX_MALLOC_64K
+#ifndef PNG_BUILDING_SYMBOL_TABLE
+/* PNG_NO_LIMITS_H may be used to turn off the use of the standard C
+ * definition file for machine specific limits, this may impact the
+ * correctness of the definitons below (see uses of INT_MAX).
*/
-#if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
-# define PNG_MAX_MALLOC_64K
-#endif
+# ifndef PNG_NO_LIMITS_H
+# include <limits.h>
+# endif
-/* Special munging to support doing things the 'cygwin' way:
- * 'Normal' png-on-win32 defines/defaults:
- * PNG_BUILD_DLL -- building dll
- * PNG_USE_DLL -- building an application, linking to dll
- * (no define) -- building static library, or building an
- * application and linking to the static lib
- * 'Cygwin' defines/defaults:
- * PNG_BUILD_DLL -- (ignored) building the dll
- * (no define) -- (ignored) building an application, linking to the dll
- * PNG_STATIC -- (ignored) building the static lib, or building an
- * application that links to the static lib.
- * ALL_STATIC -- (ignored) building various static libs, or building an
- * application that links to the static libs.
- * Thus,
- * a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and
- * this bit of #ifdefs will define the 'correct' config variables based on
- * that. If a cygwin user *wants* to define 'PNG_USE_DLL' that's okay, but
- * unnecessary.
- *
- * Also, the precedence order is:
- * ALL_STATIC (since we can't #undef something outside our namespace)
- * PNG_BUILD_DLL
- * PNG_STATIC
- * (nothing) == PNG_USE_DLL
- *
- * CYGWIN (2002-01-20): The preceding is now obsolete. With the advent
- * of auto-import in binutils, we no longer need to worry about
- * __declspec(dllexport) / __declspec(dllimport) and friends. Therefore,
- * we don't need to worry about PNG_STATIC or ALL_STATIC when it comes
- * to __declspec() stuff. However, we DO need to worry about
- * PNG_BUILD_DLL and PNG_STATIC because those change some defaults
- * such as CONSOLE_IO and whether GLOBAL_ARRAYS are allowed.
+/* For the memory copy APIs (i.e. the standard definitions of these),
+ * because this file defines png_memcpy and so on the base APIs must
+ * be defined here.
*/
-#if defined(__CYGWIN__)
-# if defined(ALL_STATIC)
-# if defined(PNG_BUILD_DLL)
-# undef PNG_BUILD_DLL
-# endif
-# if defined(PNG_USE_DLL)
-# undef PNG_USE_DLL
-# endif
-# if defined(PNG_DLL)
-# undef PNG_DLL
-# endif
-# if !defined(PNG_STATIC)
-# define PNG_STATIC
-# endif
+# ifdef BSD
+# include <strings.h>
# else
-# if defined (PNG_BUILD_DLL)
-# if defined(PNG_STATIC)
-# undef PNG_STATIC
-# endif
-# if defined(PNG_USE_DLL)
-# undef PNG_USE_DLL
-# endif
-# if !defined(PNG_DLL)
-# define PNG_DLL
-# endif
-# else
-# if defined(PNG_STATIC)
-# if defined(PNG_USE_DLL)
-# undef PNG_USE_DLL
-# endif
-# if defined(PNG_DLL)
-# undef PNG_DLL
-# endif
-# else
-# if !defined(PNG_USE_DLL)
-# define PNG_USE_DLL
-# endif
-# if !defined(PNG_DLL)
-# define PNG_DLL
-# endif
-# endif
-# endif
+# include <string.h>
# endif
-#endif
-/* This protects us against compilers that run on a windowing system
- * and thus don't have or would rather us not use the stdio types:
- * stdin, stdout, and stderr. The only one currently used is stderr
- * in png_error() and png_warning(). #defining PNG_NO_CONSOLE_IO will
- * prevent these from being compiled and used. #defining PNG_NO_STDIO
- * will also prevent these, plus will prevent the entire set of stdio
- * macros and functions (FILE *, printf, etc.) from being compiled and used,
- * unless (PNG_DEBUG > 0) has been #defined.
- *
- * #define PNG_NO_CONSOLE_IO
- * #define PNG_NO_STDIO
+/* For png_FILE_p - this provides the standard definition of a
+ * FILE
*/
-
-#if defined(_WIN32_WCE)
-# include <windows.h>
- /* Console I/O functions are not supported on WindowsCE */
-# define PNG_NO_CONSOLE_IO
-# ifdef PNG_DEBUG
-# undef PNG_DEBUG
+# ifdef PNG_STDIO_SUPPORTED
+# include <stdio.h>
# endif
#endif
-#ifdef PNG_BUILD_DLL
-# ifndef PNG_CONSOLE_IO_SUPPORTED
-# ifndef PNG_NO_CONSOLE_IO
-# define PNG_NO_CONSOLE_IO
-# endif
+/* This controls optimization of the reading of 16 and 32 bit values
+ * from PNG files. It can be set on a per-app-file basis - it
+ * just changes whether a macro is used to the function is called.
+ * The library builder sets the default, if read functions are not
+ * built into the library the macro implementation is forced on.
+ */
+#ifndef PNG_READ_INT_FUNCTIONS_SUPPORTED
+# define PNG_USE_READ_MACROS
+#endif
+#if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS)
+# if PNG_DEFAULT_READ_MACROS
+# define PNG_USE_READ_MACROS
# endif
#endif
-# ifdef PNG_NO_STDIO
-# ifndef PNG_NO_CONSOLE_IO
-# define PNG_NO_CONSOLE_IO
-# endif
-# ifdef PNG_DEBUG
-# if (PNG_DEBUG > 0)
-# include <stdio.h>
-# endif
-# endif
-# else
-# if !defined(_WIN32_WCE)
-/* "stdio.h" functions are not supported on WindowsCE */
-# include <stdio.h>
-# endif
-# endif
+/* COMPILER SPECIFIC OPTIONS.
+ *
+ * These options are provided so that a variety of difficult compilers
+ * can be used. Some are fixed at build time (e.g. PNG_API_RULE
+ * below) but still have compiler specific implementations, others
+ * may be changed on a per-file basis when compiling against libpng.
+ */
-/* This macro protects us against machines that don't have function
+/* The PNGARG macro protects us against machines that don't have function
* prototypes (ie K&R style headers). If your compiler does not handle
* function prototypes, define this macro and use the included ansi2knr.
* I've always been able to use _NO_PROTO as the indicator, but you may
*/
#ifndef PNGARG
-#ifdef OF /* zlib prototype munger */
-# define PNGARG(arglist) OF(arglist)
-#else
+# ifdef OF /* zlib prototype munger */
+# define PNGARG(arglist) OF(arglist)
+# else
-#ifdef _NO_PROTO
-# define PNGARG(arglist) ()
-# ifndef PNG_TYPECAST_NULL
-# define PNG_TYPECAST_NULL
-# endif
-#else
-# define PNGARG(arglist) arglist
-#endif /* _NO_PROTO */
+# ifdef _NO_PROTO
+# define PNGARG(arglist) ()
+# else
+# define PNGARG(arglist) arglist
+# endif /* _NO_PROTO */
-#endif /* OF */
+# endif /* OF */
#endif /* PNGARG */
-/* Try to determine if we are compiling on a Mac. Note that testing for
- * just __MWERKS__ is not good enough, because the Codewarrior is now used
- * on non-Mac platforms.
- */
-#ifndef MACOS
-# if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
- defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC)
-# define MACOS
+/* Function calling conventions.
+ * =============================
+ * Normally it is not necessary to specify to the compiler how to call
+ * a function - it just does it - however on x86 systems derived from
+ * Microsoft and Borland C compilers ('IBM PC', 'DOS', 'Windows' systems
+ * and some others) there are multiple ways to call a function and the
+ * default can be changed on the compiler command line. For this reason
+ * libpng specifies the calling convention of every exported function and
+ * every function called via a user supplied function pointer. This is
+ * done in this file by defining the following macros:
+ *
+ * PNGAPI Calling convention for exported functions.
+ * PNGCBAPI Calling convention for user provided (callback) functions.
+ * PNGCAPI Calling convention used by the ANSI-C library (required
+ * for longjmp callbacks and sometimes used internally to
+ * specify the calling convention for zlib).
+ *
+ * These macros should never be overridden. If it is necessary to
+ * change calling convention in a private build this can be done
+ * by setting PNG_API_RULE (which defaults to 0) to one of the values
+ * below to select the correct 'API' variants.
+ *
+ * PNG_API_RULE=0 Use PNGCAPI - the 'C' calling convention - throughout.
+ * This is correct in every known environment.
+ * PNG_API_RULE=1 Use the operating system convention for PNGAPI and
+ * the 'C' calling convention (from PNGCAPI) for
+ * callbacks (PNGCBAPI). This is no longer required
+ * in any known environment - if it has to be used
+ * please post an explanation of the problem to the
+ * libpng mailing list.
+ *
+ * These cases only differ if the operating system does not use the C
+ * calling convention, at present this just means the above cases
+ * (x86 DOS/Windows sytems) and, even then, this does not apply to
+ * Cygwin running on those systems.
+ *
+ * Note that the value must be defined in pnglibconf.h so that what
+ * the application uses to call the library matches the conventions
+ * set when building the library.
+ */
+
+/* Symbol export
+ * =============
+ * When building a shared library it is almost always necessary to tell
+ * the compiler which symbols to export. The png.h macro 'PNG_EXPORT'
+ * is used to mark the symbols. On some systems these symbols can be
+ * extracted at link time and need no special processing by the compiler,
+ * on other systems the symbols are flagged by the compiler and just
+ * the declaration requires a special tag applied (unfortunately) in a
+ * compiler dependent way. Some systems can do either.
+ *
+ * A small number of older systems also require a symbol from a DLL to
+ * be flagged to the program that calls it. This is a problem because
+ * we do not know in the header file included by application code that
+ * the symbol will come from a shared library, as opposed to a statically
+ * linked one. For this reason the application must tell us by setting
+ * the magic flag PNG_USE_DLL to turn on the special processing before
+ * it includes png.h.
+ *
+ * Four additional macros are used to make this happen:
+ *
+ * PNG_IMPEXP The magic (if any) to cause a symbol to be exported from
+ * the build or imported if PNG_USE_DLL is set - compiler
+ * and system specific.
+ *
+ * PNG_EXPORT_TYPE(type) A macro that pre or appends PNG_IMPEXP to
+ * 'type', compiler specific.
+ *
+ * PNG_DLL_EXPORT Set to the magic to use during a libpng build to
+ * make a symbol exported from the DLL. Not used in the
+ * public header files; see pngpriv.h for how it is used
+ * in the libpng build.
+ *
+ * PNG_DLL_IMPORT Set to the magic to force the libpng symbols to come
+ * from a DLL - used to define PNG_IMPEXP when
+ * PNG_USE_DLL is set.
+ */
+
+/* System specific discovery.
+ * ==========================
+ * This code is used at build time to find PNG_IMPEXP, the API settings
+ * and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL
+ * import processing is possible. On Windows/x86 systems it also sets
+ * compiler-specific macros to the values required to change the calling
+ * conventions of the various functions.
+ */
+#if ( defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\
+ defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__) ) &&\
+ ( defined(_X86_) || defined(_X64_) || defined(_M_IX86) ||\
+ defined(_M_X64) || defined(_M_IA64) )
+ /* Windows system (DOS doesn't support DLLs) running on x86/x64. Includes
+ * builds under Cygwin or MinGW. Also includes Watcom builds but these need
+ * special treatment because they are not compatible with GCC or Visual C
+ * because of different calling conventions.
+ */
+# if PNG_API_RULE == 2
+ /* If this line results in an error, either because __watcall is not
+ * understood or because of a redefine just below you cannot use *this*
+ * build of the library with the compiler you are using. *This* build was
+ * build using Watcom and applications must also be built using Watcom!
+ */
+# define PNGCAPI __watcall
# endif
-#endif
-
-/* enough people need this for various reasons to include it here */
-#if !defined(MACOS) && !defined(RISCOS) && !defined(_WIN32_WCE)
-# include <sys/types.h>
-#endif
-
-#if !defined(PNG_SETJMP_NOT_SUPPORTED) && !defined(PNG_NO_SETJMP_SUPPORTED)
-# define PNG_SETJMP_SUPPORTED
-#endif
-#ifdef PNG_SETJMP_SUPPORTED
-/* This is an attempt to force a single setjmp behaviour on Linux. If
- * the X config stuff didn't define _BSD_SOURCE we wouldn't need this.
- */
-
-# ifdef __linux__
-# ifdef _BSD_SOURCE
-# define PNG_SAVE_BSD_SOURCE
-# undef _BSD_SOURCE
+# if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
+# define PNGCAPI __cdecl
+# if PNG_API_RULE == 1
+# define PNGAPI __stdcall
# endif
-# ifdef _SETJMP_H
- __png.h__ already includes setjmp.h;
- __dont__ include it again.;
+# else
+ /* An older compiler, or one not detected (erroneously) above,
+ * if necessary override on the command line to get the correct
+ * variants for the compiler.
+ */
+# ifndef PNGCAPI
+# define PNGCAPI _cdecl
# endif
-# endif /* __linux__ */
-
- /* include setjmp.h for error handling */
-# include <setjmp.h>
-
-# ifdef __linux__
-# ifdef PNG_SAVE_BSD_SOURCE
-# define _BSD_SOURCE
-# undef PNG_SAVE_BSD_SOURCE
+# if PNG_API_RULE == 1 && !defined(PNGAPI)
+# define PNGAPI _stdcall
# endif
-# endif /* __linux__ */
-#endif /* PNG_SETJMP_SUPPORTED */
-
-#ifdef BSD
-# include <strings.h>
-#else
-# include <string.h>
-#endif
-
-/* Other defines for things like memory and the like can go here. */
-#ifdef PNG_INTERNAL
-
-#include <stdlib.h>
-
-/* The functions exported by PNG_EXTERN are PNG_INTERNAL functions, which
- * aren't usually used outside the library (as far as I know), so it is
- * debatable if they should be exported at all. In the future, when it is
- * possible to have run-time registry of chunk-handling functions, some of
- * these will be made available again.
-#define PNG_EXTERN extern
- */
-#define PNG_EXTERN
-
-/* Other defines specific to compilers can go here. Try to keep
- * them inside an appropriate ifdef/endif pair for portability.
- */
+# endif /* compiler/api */
+ /* NOTE: PNGCBAPI always defaults to PNGCAPI. */
-#if defined(PNG_FLOATING_POINT_SUPPORTED)
-# if defined(MACOS)
- /* We need to check that <math.h> hasn't already been included earlier
- * as it seems it doesn't agree with <fp.h>, yet we should really use
- * <fp.h> if possible.
- */
-# if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__)
-# include <fp.h>
-# endif
-# else
-# include <math.h>
+# if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD)
+ ERROR: PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed
# endif
-# if defined(_AMIGA) && defined(__SASC) && defined(_M68881)
- /* Amiga SAS/C: We must include builtin FPU functions when compiling using
- * MATH=68881
- */
-# include <m68881.h>
-# endif
-#endif
-
-/* Codewarrior on NT has linking problems without this. */
-#if (defined(__MWERKS__) && defined(WIN32)) || defined(__STDC__)
-# define PNG_ALWAYS_EXTERN
-#endif
-
-/* For some reason, Borland C++ defines memcmp, etc. in mem.h, not
- * stdlib.h like it should (I think). Or perhaps this is a C++
- * "feature"?
- */
-#ifdef __TURBOC__
-# include <mem.h>
-# include "alloc.h"
-#endif
-#if defined(_MSC_VER) && (defined(WIN32) || defined(_Windows) || \
- defined(_WINDOWS) || defined(_WIN32) || defined(__WIN32__))
-# include <malloc.h>
-#endif
-
-/* This controls how fine the dithering gets. As this allocates
- * a largish chunk of memory (32K), those who are not as concerned
- * with dithering quality can decrease some or all of these.
- */
-#ifndef PNG_DITHER_RED_BITS
-# define PNG_DITHER_RED_BITS 5
-#endif
-#ifndef PNG_DITHER_GREEN_BITS
-# define PNG_DITHER_GREEN_BITS 5
-#endif
-#ifndef PNG_DITHER_BLUE_BITS
-# define PNG_DITHER_BLUE_BITS 5
-#endif
-
-/* This controls how fine the gamma correction becomes when you
- * are only interested in 8 bits anyway. Increasing this value
- * results in more memory being used, and more pow() functions
- * being called to fill in the gamma tables. Don't set this value
- * less then 8, and even that may not work (I haven't tested it).
- */
+# if (defined(_MSC_VER) && _MSC_VER < 800) ||\
+ (defined(__BORLANDC__) && __BORLANDC__ < 0x500)
+ /* older Borland and MSC
+ * compilers used '__export' and required this to be after
+ * the type.
+ */
+# ifndef PNG_EXPORT_TYPE
+# define PNG_EXPORT_TYPE(type) type PNG_IMPEXP
+# endif
+# define PNG_DLL_EXPORT __export
+# else /* newer compiler */
+# define PNG_DLL_EXPORT __declspec(dllexport)
+# ifndef PNG_DLL_IMPORT
+# define PNG_DLL_IMPORT __declspec(dllimport)
+# endif
+# endif /* compiler */
-#ifndef PNG_MAX_GAMMA_8
-# define PNG_MAX_GAMMA_8 11
-#endif
+#else /* !Windows/x86 */
+# if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
+# define PNGAPI _System
+# else /* !Windows/x86 && !OS/2 */
+ /* Use the defaults, or define PNG*API on the command line (but
+ * this will have to be done for every compile!)
+ */
+# endif /* other system, !OS/2 */
+#endif /* !Windows/x86 */
-/* This controls how much a difference in gamma we can tolerate before
- * we actually start doing gamma conversion.
- */
-#ifndef PNG_GAMMA_THRESHOLD
-# define PNG_GAMMA_THRESHOLD 0.05
+/* Now do all the defaulting . */
+#ifndef PNGCAPI
+# define PNGCAPI
#endif
-
-#endif /* PNG_INTERNAL */
-
-/* The following uses const char * instead of char * for error
- * and warning message functions, so some compilers won't complain.
- * If you do not want to use const, define PNG_NO_CONST here.
- */
-
-#ifndef PNG_NO_CONST
-# define PNG_CONST const
-#else
-# define PNG_CONST
+#ifndef PNGCBAPI
+# define PNGCBAPI PNGCAPI
#endif
-
-/* The following defines give you the ability to remove code from the
- * library that you will not be using. I wish I could figure out how to
- * automate this, but I can't do that without making it seriously hard
- * on the users. So if you are not using an ability, change the #define
- * to and #undef, and that part of the library will not be compiled. If
- * your linker can't find a function, you may want to make sure the
- * ability is defined here. Some of these depend upon some others being
- * defined. I haven't figured out all the interactions here, so you may
- * have to experiment awhile to get everything to compile. If you are
- * creating or using a shared library, you probably shouldn't touch this,
- * as it will affect the size of the structures, and this will cause bad
- * things to happen if the library and/or application ever change.
- */
-
-/* Any features you will not be using can be undef'ed here */
-
-/* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user
- * to turn it off with "*TRANSFORMS_NOT_SUPPORTED" or *PNG_NO_*_TRANSFORMS
- * on the compile line, then pick and choose which ones to define without
- * having to edit this file. It is safe to use the *TRANSFORMS_NOT_SUPPORTED
- * if you only want to have a png-compliant reader/writer but don't need
- * any of the extra transformations. This saves about 80 kbytes in a
- * typical installation of the library. (PNG_NO_* form added in version
- * 1.0.1c, for consistency)
- */
-
-/* The size of the png_text structure changed in libpng-1.0.6 when
- * iTXt is supported. It is turned off by default, to support old apps
- * that malloc the png_text structure instead of calling png_set_text()
- * and letting libpng malloc it. It will be turned on by default in
- * libpng-1.3.0.
- */
-
-#ifndef PNG_iTXt_SUPPORTED
-# if !defined(PNG_READ_iTXt_SUPPORTED) && !defined(PNG_NO_READ_iTXt)
-# define PNG_NO_READ_iTXt
-# endif
-# if !defined(PNG_WRITE_iTXt_SUPPORTED) && !defined(PNG_NO_WRITE_iTXt)
-# define PNG_NO_WRITE_iTXt
-# endif
+#ifndef PNGAPI
+# define PNGAPI PNGCAPI
#endif
-/* The following support, added after version 1.0.0, can be turned off here en
- * masse by defining PNG_LEGACY_SUPPORTED in case you need binary compatibility
- * with old applications that require the length of png_struct and png_info
- * to remain unchanged.
+/* PNG_IMPEXP may be set on the compilation system command line or (if not set)
+ * then in an internal header file when building the library, otherwise (when
+ * using the library) it is set here.
*/
-
-#ifdef PNG_LEGACY_SUPPORTED
-# define PNG_NO_FREE_ME
-# define PNG_NO_READ_UNKNOWN_CHUNKS
-# define PNG_NO_WRITE_UNKNOWN_CHUNKS
-# define PNG_NO_READ_USER_CHUNKS
-# define PNG_NO_READ_iCCP
-# define PNG_NO_WRITE_iCCP
-# define PNG_NO_READ_iTXt
-# define PNG_NO_WRITE_iTXt
-# define PNG_NO_READ_sCAL
-# define PNG_NO_WRITE_sCAL
-# define PNG_NO_READ_sPLT
-# define PNG_NO_WRITE_sPLT
-# define PNG_NO_INFO_IMAGE
-# define PNG_NO_READ_RGB_TO_GRAY
-# define PNG_NO_READ_USER_TRANSFORM
-# define PNG_NO_WRITE_USER_TRANSFORM
-# define PNG_NO_USER_MEM
-# define PNG_NO_READ_EMPTY_PLTE
-# define PNG_NO_MNG_FEATURES
-# define PNG_NO_FIXED_POINT_SUPPORTED
-#endif
-
-/* Ignore attempt to turn off both floating and fixed point support */
-#if !defined(PNG_FLOATING_POINT_SUPPORTED) || \
- !defined(PNG_NO_FIXED_POINT_SUPPORTED)
-# define PNG_FIXED_POINT_SUPPORTED
-#endif
-
-#ifndef PNG_NO_FREE_ME
-# define PNG_FREE_ME_SUPPORTED
-#endif
-
-#if defined(PNG_READ_SUPPORTED)
-
-#if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \
- !defined(PNG_NO_READ_TRANSFORMS)
-# define PNG_READ_TRANSFORMS_SUPPORTED
-#endif
-
-#ifdef PNG_READ_TRANSFORMS_SUPPORTED
-# ifndef PNG_NO_READ_EXPAND
-# define PNG_READ_EXPAND_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_SHIFT
-# define PNG_READ_SHIFT_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_PACK
-# define PNG_READ_PACK_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_BGR
-# define PNG_READ_BGR_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_SWAP
-# define PNG_READ_SWAP_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_PACKSWAP
-# define PNG_READ_PACKSWAP_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_INVERT
-# define PNG_READ_INVERT_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_DITHER
-# define PNG_READ_DITHER_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_BACKGROUND
-# define PNG_READ_BACKGROUND_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_16_TO_8
-# define PNG_READ_16_TO_8_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_FILLER
-# define PNG_READ_FILLER_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_GAMMA
-# define PNG_READ_GAMMA_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_GRAY_TO_RGB
-# define PNG_READ_GRAY_TO_RGB_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_SWAP_ALPHA
-# define PNG_READ_SWAP_ALPHA_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_INVERT_ALPHA
-# define PNG_READ_INVERT_ALPHA_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_STRIP_ALPHA
-# define PNG_READ_STRIP_ALPHA_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_USER_TRANSFORM
-# define PNG_READ_USER_TRANSFORM_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_RGB_TO_GRAY
-# define PNG_READ_RGB_TO_GRAY_SUPPORTED
-# endif
-#endif /* PNG_READ_TRANSFORMS_SUPPORTED */
-
-#if !defined(PNG_NO_PROGRESSIVE_READ) && \
- !defined(PNG_PROGRESSIVE_READ_NOT_SUPPORTED) /* if you don't do progressive */
-# define PNG_PROGRESSIVE_READ_SUPPORTED /* reading. This is not talking */
-#endif /* about interlacing capability! You'll */
- /* still have interlacing unless you change the following line: */
-
-#define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */
-
-#ifndef PNG_NO_READ_COMPOSITE_NODIV
-# ifndef PNG_NO_READ_COMPOSITED_NODIV /* libpng-1.0.x misspelling */
-# define PNG_READ_COMPOSITE_NODIV_SUPPORTED /* well tested on Intel, SGI */
-# endif
-#endif
-
-/* Deprecated, will be removed from version 2.0.0.
- Use PNG_MNG_FEATURES_SUPPORTED instead. */
-#ifndef PNG_NO_READ_EMPTY_PLTE
-# define PNG_READ_EMPTY_PLTE_SUPPORTED
-#endif
-
-#endif /* PNG_READ_SUPPORTED */
-
-#if defined(PNG_WRITE_SUPPORTED)
-
-# if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \
- !defined(PNG_NO_WRITE_TRANSFORMS)
-# define PNG_WRITE_TRANSFORMS_SUPPORTED
-#endif
-
-#ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
-# ifndef PNG_NO_WRITE_SHIFT
-# define PNG_WRITE_SHIFT_SUPPORTED
-# endif
-# ifndef PNG_NO_WRITE_PACK
-# define PNG_WRITE_PACK_SUPPORTED
-# endif
-# ifndef PNG_NO_WRITE_BGR
-# define PNG_WRITE_BGR_SUPPORTED
-# endif
-# ifndef PNG_NO_WRITE_SWAP
-# define PNG_WRITE_SWAP_SUPPORTED
-# endif
-# ifndef PNG_NO_WRITE_PACKSWAP
-# define PNG_WRITE_PACKSWAP_SUPPORTED
-# endif
-# ifndef PNG_NO_WRITE_INVERT
-# define PNG_WRITE_INVERT_SUPPORTED
-# endif
-# ifndef PNG_NO_WRITE_FILLER
-# define PNG_WRITE_FILLER_SUPPORTED /* same as WRITE_STRIP_ALPHA */
-# endif
-# ifndef PNG_NO_WRITE_SWAP_ALPHA
-# define PNG_WRITE_SWAP_ALPHA_SUPPORTED
-# endif
-# ifndef PNG_NO_WRITE_INVERT_ALPHA
-# define PNG_WRITE_INVERT_ALPHA_SUPPORTED
-# endif
-# ifndef PNG_NO_WRITE_USER_TRANSFORM
-# define PNG_WRITE_USER_TRANSFORM_SUPPORTED
+#ifndef PNG_IMPEXP
+# if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT)
+ /* This forces use of a DLL, disallowing static linking */
+# define PNG_IMPEXP PNG_DLL_IMPORT
# endif
-#endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */
-#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
- defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
-# ifndef PNG_NO_USER_TRANSFORM_PTR
-# define PNG_USER_TRANSFORM_PTR_SUPPORTED
+# ifndef PNG_IMPEXP
+# define PNG_IMPEXP
# endif
#endif
-#define PNG_WRITE_INTERLACING_SUPPORTED /* not required for PNG-compliant
- encoders, but can cause trouble
- if left undefined */
-
-#if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \
- defined(PNG_FLOATING_POINT_SUPPORTED)
-# define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
-#endif
-
-#ifndef PNG_1_0_X
-#ifndef PNG_NO_ERROR_NUMBERS
-#define PNG_ERROR_NUMBERS_SUPPORTED
-#endif
-#endif /* PNG_1_0_X */
-
-#ifndef PNG_NO_WRITE_FLUSH
-# define PNG_WRITE_FLUSH_SUPPORTED
+/* In 1.5.2 the definition of PNG_FUNCTION has been changed to always treat
+ * 'attributes' as a storage class - the attributes go at the start of the
+ * function definition, and attributes are always appended regardless of the
+ * compiler. This considerably simplifies these macros but may cause problems
+ * if any compilers both need function attributes and fail to handle them as
+ * a storage class (this is unlikely.)
+ */
+#ifndef PNG_FUNCTION
+# define PNG_FUNCTION(type, name, args, attributes) attributes type name args
#endif
-/* Deprecated, see PNG_MNG_FEATURES_SUPPORTED, above */
-#ifndef PNG_NO_WRITE_EMPTY_PLTE
-# define PNG_WRITE_EMPTY_PLTE_SUPPORTED
+#ifndef PNG_EXPORT_TYPE
+# define PNG_EXPORT_TYPE(type) PNG_IMPEXP type
#endif
-#endif /* PNG_WRITE_SUPPORTED */
+ /* The ordinal value is only relevant when preprocessing png.h for symbol
+ * table entries, so we discard it here. See the .dfn files in the
+ * scripts directory.
+ */
+#ifndef PNG_EXPORTA
-#ifndef PNG_NO_STDIO
-# define PNG_TIME_RFC1123_SUPPORTED
+# define PNG_EXPORTA(ordinal, type, name, args, attributes)\
+ PNG_FUNCTION(PNG_EXPORT_TYPE(type),(PNGAPI name),PNGARG(args), \
+ extern attributes)
#endif
-/* This adds extra functions in pngget.c for accessing data from the
- * info pointer (added in version 0.99)
- * png_get_image_width()
- * png_get_image_height()
- * png_get_bit_depth()
- * png_get_color_type()
- * png_get_compression_type()
- * png_get_filter_type()
- * png_get_interlace_type()
- * png_get_pixel_aspect_ratio()
- * png_get_pixels_per_meter()
- * png_get_x_offset_pixels()
- * png_get_y_offset_pixels()
- * png_get_x_offset_microns()
- * png_get_y_offset_microns()
+/* ANSI-C (C90) does not permit a macro to be invoked with an empty argument,
+ * so make something non-empty to satisfy the requirement:
*/
-#if !defined(PNG_NO_EASY_ACCESS) && !defined(PNG_EASY_ACCESS_SUPPORTED)
-# define PNG_EASY_ACCESS_SUPPORTED
-#endif
+#define PNG_EMPTY /*empty list*/
-/* PNG_ASSEMBLER_CODE was enabled by default in version 1.2.0
- even when PNG_USE_PNGVCRD or PNG_USE_PNGGCCRD is not defined */
-#if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_ASSEMBLER_CODE)
-# ifndef PNG_ASSEMBLER_CODE_SUPPORTED
-# define PNG_ASSEMBLER_CODE_SUPPORTED
-# endif
-# if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
-# define PNG_MMX_CODE_SUPPORTED
-# endif
-#endif
-
-/* If you are sure that you don't need thread safety and you are compiling
- with PNG_USE_PNGCCRD for an MMX application, you can define this for
- faster execution. See pnggccrd.c.
-#define PNG_THREAD_UNSAFE_OK
-*/
+#define PNG_EXPORT(ordinal, type, name, args)\
+ PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY)
-#if !defined(PNG_1_0_X)
-#if !defined(PNG_NO_USER_MEM) && !defined(PNG_USER_MEM_SUPPORTED)
-# define PNG_USER_MEM_SUPPORTED
+/* Use PNG_REMOVED to comment out a removed interface. */
+#ifndef PNG_REMOVED
+# define PNG_REMOVED(ordinal, type, name, args, attributes)
#endif
-#endif /* PNG_1_0_X */
-/* These are currently experimental features, define them if you want */
-
-/* very little testing */
-/*
-#ifdef PNG_READ_SUPPORTED
-# ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
-# define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
-# endif
+#ifndef PNG_CALLBACK
+# define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) PNGARG(args)
#endif
-*/
-/* This is only for PowerPC big-endian and 680x0 systems */
-/* some testing */
-/*
-#ifdef PNG_READ_SUPPORTED
-# ifndef PNG_PNG_READ_BIG_ENDIAN_SUPPORTED
-# define PNG_READ_BIG_ENDIAN_SUPPORTED
-# endif
-#endif
-*/
-
-/* Buggy compilers (e.g., gcc 2.7.2.2) need this */
-/*
-#define PNG_NO_POINTER_INDEXING
-*/
-
-/* These functions are turned off by default, as they will be phased out. */
-/*
-#define PNG_USELESS_TESTS_SUPPORTED
-#define PNG_CORRECT_PALETTE_SUPPORTED
-*/
-
-/* Any chunks you are not interested in, you can undef here. The
- * ones that allocate memory may be expecially important (hIST,
- * tEXt, zTXt, tRNS, pCAL). Others will just save time and make png_info
- * a bit smaller.
+/* Support for compiler specific function attributes. These are used
+ * so that where compiler support is available incorrect use of API
+ * functions in png.h will generate compiler warnings.
+ *
+ * Added at libpng-1.2.41.
*/
-#if defined(PNG_READ_SUPPORTED) && \
- !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
- !defined(PNG_NO_READ_ANCILLARY_CHUNKS)
-# define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
-#endif
-
-#if defined(PNG_WRITE_SUPPORTED) && \
- !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
- !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS)
-# define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
-#endif
-
-#ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
-
-#ifdef PNG_NO_READ_TEXT
-# define PNG_NO_READ_iTXt
-# define PNG_NO_READ_tEXt
-# define PNG_NO_READ_zTXt
-#endif
-#ifndef PNG_NO_READ_bKGD
-# define PNG_READ_bKGD_SUPPORTED
-# define PNG_bKGD_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_cHRM
-# define PNG_READ_cHRM_SUPPORTED
-# define PNG_cHRM_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_gAMA
-# define PNG_READ_gAMA_SUPPORTED
-# define PNG_gAMA_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_hIST
-# define PNG_READ_hIST_SUPPORTED
-# define PNG_hIST_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_iCCP
-# define PNG_READ_iCCP_SUPPORTED
-# define PNG_iCCP_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_iTXt
-# ifndef PNG_READ_iTXt_SUPPORTED
-# define PNG_READ_iTXt_SUPPORTED
-# endif
-# ifndef PNG_iTXt_SUPPORTED
-# define PNG_iTXt_SUPPORTED
+#ifndef PNG_NO_PEDANTIC_WARNINGS
+# ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED
+# define PNG_PEDANTIC_WARNINGS_SUPPORTED
# endif
#endif
-#ifndef PNG_NO_READ_oFFs
-# define PNG_READ_oFFs_SUPPORTED
-# define PNG_oFFs_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_pCAL
-# define PNG_READ_pCAL_SUPPORTED
-# define PNG_pCAL_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_sCAL
-# define PNG_READ_sCAL_SUPPORTED
-# define PNG_sCAL_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_pHYs
-# define PNG_READ_pHYs_SUPPORTED
-# define PNG_pHYs_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_sBIT
-# define PNG_READ_sBIT_SUPPORTED
-# define PNG_sBIT_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_sPLT
-# define PNG_READ_sPLT_SUPPORTED
-# define PNG_sPLT_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_sRGB
-# define PNG_READ_sRGB_SUPPORTED
-# define PNG_sRGB_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_tEXt
-# define PNG_READ_tEXt_SUPPORTED
-# define PNG_tEXt_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_tIME
-# define PNG_READ_tIME_SUPPORTED
-# define PNG_tIME_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_tRNS
-# define PNG_READ_tRNS_SUPPORTED
-# define PNG_tRNS_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_zTXt
-# define PNG_READ_zTXt_SUPPORTED
-# define PNG_zTXt_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_UNKNOWN_CHUNKS
-# define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
-# ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
-# define PNG_UNKNOWN_CHUNKS_SUPPORTED
-# endif
-# ifndef PNG_NO_HANDLE_AS_UNKNOWN
-# define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
-# endif
-#endif
-#if !defined(PNG_NO_READ_USER_CHUNKS) && \
- defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
-# define PNG_READ_USER_CHUNKS_SUPPORTED
-# define PNG_USER_CHUNKS_SUPPORTED
-# ifdef PNG_NO_READ_UNKNOWN_CHUNKS
-# undef PNG_NO_READ_UNKNOWN_CHUNKS
-# endif
-# ifdef PNG_NO_HANDLE_AS_UNKNOWN
-# undef PNG_NO_HANDLE_AS_UNKNOWN
-# endif
-#endif
-#ifndef PNG_NO_READ_OPT_PLTE
-# define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */
-#endif /* optional PLTE chunk in RGB and RGBA images */
-#if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \
- defined(PNG_READ_zTXt_SUPPORTED)
-# define PNG_READ_TEXT_SUPPORTED
-# define PNG_TEXT_SUPPORTED
-#endif
-#endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */
+#ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED
+ /* Support for compiler specific function attributes. These are used
+ * so that where compiler support is available incorrect use of API
+ * functions in png.h will generate compiler warnings. Added at libpng
+ * version 1.2.41.
+ */
+# if defined(__GNUC__)
+# ifndef PNG_USE_RESULT
+# define PNG_USE_RESULT __attribute__((__warn_unused_result__))
+# endif
+# ifndef PNG_NORETURN
+# define PNG_NORETURN __attribute__((__noreturn__))
+# endif
+# ifndef PNG_ALLOCATED
+# define PNG_ALLOCATED __attribute__((__malloc__))
+# endif
+# ifndef PNG_DEPRECATED
+# define PNG_DEPRECATED __attribute__((__deprecated__))
+# endif
+# ifndef PNG_PRIVATE
+# if 0 /* Doesn't work so we use deprecated instead*/
+# define PNG_PRIVATE \
+ __attribute__((warning("This function is not exported by libpng.")))
+# else
+# define PNG_PRIVATE \
+ __attribute__((__deprecated__))
+# endif
+# endif
+# endif /* __GNUC__ */
-#ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
+# if defined(_MSC_VER) && (_MSC_VER >= 1300)
+# ifndef PNG_USE_RESULT
+# define PNG_USE_RESULT /* not supported */
+# endif
+# ifndef PNG_NORETURN
+# define PNG_NORETURN __declspec(noreturn)
+# endif
+# ifndef PNG_ALLOCATED
+# if (_MSC_VER >= 1400)
+# define PNG_ALLOCATED __declspec(restrict)
+# endif
+# endif
+# ifndef PNG_DEPRECATED
+# define PNG_DEPRECATED __declspec(deprecated)
+# endif
+# ifndef PNG_PRIVATE
+# define PNG_PRIVATE __declspec(deprecated)
+# endif
+# endif /* _MSC_VER */
+#endif /* PNG_PEDANTIC_WARNINGS */
-#ifdef PNG_NO_WRITE_TEXT
-# define PNG_NO_WRITE_iTXt
-# define PNG_NO_WRITE_tEXt
-# define PNG_NO_WRITE_zTXt
-#endif
-#ifndef PNG_NO_WRITE_bKGD
-# define PNG_WRITE_bKGD_SUPPORTED
-# ifndef PNG_bKGD_SUPPORTED
-# define PNG_bKGD_SUPPORTED
-# endif
-#endif
-#ifndef PNG_NO_WRITE_cHRM
-# define PNG_WRITE_cHRM_SUPPORTED
-# ifndef PNG_cHRM_SUPPORTED
-# define PNG_cHRM_SUPPORTED
-# endif
-#endif
-#ifndef PNG_NO_WRITE_gAMA
-# define PNG_WRITE_gAMA_SUPPORTED
-# ifndef PNG_gAMA_SUPPORTED
-# define PNG_gAMA_SUPPORTED
-# endif
-#endif
-#ifndef PNG_NO_WRITE_hIST
-# define PNG_WRITE_hIST_SUPPORTED
-# ifndef PNG_hIST_SUPPORTED
-# define PNG_hIST_SUPPORTED
-# endif
-#endif
-#ifndef PNG_NO_WRITE_iCCP
-# define PNG_WRITE_iCCP_SUPPORTED
-# ifndef PNG_iCCP_SUPPORTED
-# define PNG_iCCP_SUPPORTED
-# endif
+#ifndef PNG_DEPRECATED
+# define PNG_DEPRECATED /* Use of this function is deprecated */
#endif
-#ifndef PNG_NO_WRITE_iTXt
-# ifndef PNG_WRITE_iTXt_SUPPORTED
-# define PNG_WRITE_iTXt_SUPPORTED
-# endif
-# ifndef PNG_iTXt_SUPPORTED
-# define PNG_iTXt_SUPPORTED
-# endif
-#endif
-#ifndef PNG_NO_WRITE_oFFs
-# define PNG_WRITE_oFFs_SUPPORTED
-# ifndef PNG_oFFs_SUPPORTED
-# define PNG_oFFs_SUPPORTED
-# endif
-#endif
-#ifndef PNG_NO_WRITE_pCAL
-# define PNG_WRITE_pCAL_SUPPORTED
-# ifndef PNG_pCAL_SUPPORTED
-# define PNG_pCAL_SUPPORTED
-# endif
+#ifndef PNG_USE_RESULT
+# define PNG_USE_RESULT /* The result of this function must be checked */
#endif
-#ifndef PNG_NO_WRITE_sCAL
-# define PNG_WRITE_sCAL_SUPPORTED
-# ifndef PNG_sCAL_SUPPORTED
-# define PNG_sCAL_SUPPORTED
-# endif
-#endif
-#ifndef PNG_NO_WRITE_pHYs
-# define PNG_WRITE_pHYs_SUPPORTED
-# ifndef PNG_pHYs_SUPPORTED
-# define PNG_pHYs_SUPPORTED
-# endif
+#ifndef PNG_NORETURN
+# define PNG_NORETURN /* This function does not return */
#endif
-#ifndef PNG_NO_WRITE_sBIT
-# define PNG_WRITE_sBIT_SUPPORTED
-# ifndef PNG_sBIT_SUPPORTED
-# define PNG_sBIT_SUPPORTED
-# endif
+#ifndef PNG_ALLOCATED
+# define PNG_ALLOCATED /* The result of the function is new memory */
#endif
-#ifndef PNG_NO_WRITE_sPLT
-# define PNG_WRITE_sPLT_SUPPORTED
-# ifndef PNG_sPLT_SUPPORTED
-# define PNG_sPLT_SUPPORTED
-# endif
+#ifndef PNG_PRIVATE
+# define PNG_PRIVATE /* This is a private libpng function */
#endif
-#ifndef PNG_NO_WRITE_sRGB
-# define PNG_WRITE_sRGB_SUPPORTED
-# ifndef PNG_sRGB_SUPPORTED
-# define PNG_sRGB_SUPPORTED
+#ifndef PNG_FP_EXPORT /* A floating point API. */
+# ifdef PNG_FLOATING_POINT_SUPPORTED
+# define PNG_FP_EXPORT(ordinal, type, name, args)\
+ PNG_EXPORT(ordinal, type, name, args)
+# else /* No floating point APIs */
+# define PNG_FP_EXPORT(ordinal, type, name, args)
# endif
#endif
-#ifndef PNG_NO_WRITE_tEXt
-# define PNG_WRITE_tEXt_SUPPORTED
-# ifndef PNG_tEXt_SUPPORTED
-# define PNG_tEXt_SUPPORTED
+#ifndef PNG_FIXED_EXPORT /* A fixed point API. */
+# ifdef PNG_FIXED_POINT_SUPPORTED
+# define PNG_FIXED_EXPORT(ordinal, type, name, args)\
+ PNG_EXPORT(ordinal, type, name, args)
+# else /* No fixed point APIs */
+# define PNG_FIXED_EXPORT(ordinal, type, name, args)
# endif
#endif
-#ifndef PNG_NO_WRITE_tIME
-# define PNG_WRITE_tIME_SUPPORTED
-# ifndef PNG_tIME_SUPPORTED
-# define PNG_tIME_SUPPORTED
-# endif
-#endif
-#ifndef PNG_NO_WRITE_tRNS
-# define PNG_WRITE_tRNS_SUPPORTED
-# ifndef PNG_tRNS_SUPPORTED
-# define PNG_tRNS_SUPPORTED
-# endif
-#endif
-#ifndef PNG_NO_WRITE_zTXt
-# define PNG_WRITE_zTXt_SUPPORTED
-# ifndef PNG_zTXt_SUPPORTED
-# define PNG_zTXt_SUPPORTED
-# endif
-#endif
-#ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS
-# define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
-# ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
-# define PNG_UNKNOWN_CHUNKS_SUPPORTED
-# endif
-# ifndef PNG_NO_HANDLE_AS_UNKNOWN
-# ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
-# define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
-# endif
-# endif
-#endif
-#if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
- defined(PNG_WRITE_zTXt_SUPPORTED)
-# define PNG_WRITE_TEXT_SUPPORTED
-# ifndef PNG_TEXT_SUPPORTED
-# define PNG_TEXT_SUPPORTED
-# endif
-#endif
-
-#endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */
-/* Turn this off to disable png_read_png() and
- * png_write_png() and leave the row_pointers member
- * out of the info structure.
+/* The following uses const char * instead of char * for error
+ * and warning message functions, so some compilers won't complain.
+ * If you do not want to use const, define PNG_NO_CONST here.
+ *
+ * This should not change how the APIs are called, so it can be done
+ * on a per-file basis in the application.
*/
-#ifndef PNG_NO_INFO_IMAGE
-# define PNG_INFO_IMAGE_SUPPORTED
-#endif
-
-/* need the time information for reading tIME chunks */
-#if defined(PNG_tIME_SUPPORTED)
-# if !defined(_WIN32_WCE)
- /* "time.h" functions are not supported on WindowsCE */
-# include <time.h>
+#ifndef PNG_CONST
+# ifndef PNG_NO_CONST
+# define PNG_CONST const
+# else
+# define PNG_CONST
# endif
#endif
* numbers suggest (a png_uint_32 must be at least 32 bits long), but they
* don't have to be exactly that size. Some compilers dislike passing
* unsigned shorts as function parameters, so you may be better off using
- * unsigned int for png_uint_16. Likewise, for 64-bit systems, you may
- * want to have unsigned int for png_uint_32 instead of unsigned long.
+ * unsigned int for png_uint_16.
*/
+#if defined(INT_MAX) && (INT_MAX > 0x7ffffffeL)
+typedef unsigned int png_uint_32;
+typedef int png_int_32;
+#else
typedef unsigned long png_uint_32;
typedef long png_int_32;
+#endif
typedef unsigned short png_uint_16;
typedef short png_int_16;
typedef unsigned char png_byte;
-/* This is usually size_t. It is typedef'ed just in case you need it to
- change (I'm not sure if you will or not, so I thought I'd be safe) */
+#ifdef PNG_NO_SIZE_T
+typedef unsigned int png_size_t;
+#else
typedef size_t png_size_t;
+#endif
+#define png_sizeof(x) (sizeof (x))
/* The following is needed for medium model support. It cannot be in the
- * PNG_INTERNAL section. Needs modification for other compilers besides
+ * pngpriv.h header. Needs modification for other compilers besides
* MSC. Model independent support declares all arrays and pointers to be
* large using the far keyword. The zlib version used must also support
* model independent data. As of version zlib 1.0.4, the necessary changes
*/
/* Separate compiler dependencies (problem here is that zlib.h always
- defines FAR. (SJT) */
+ * defines FAR. (SJT)
+ */
#ifdef __BORLANDC__
# if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)
# define LDATA 1
# else
# define LDATA 0
# endif
- /* GRR: why is Cygwin in here? Cygwin is not Borland C... */
+ /* GRR: why is Cygwin in here? Cygwin is not Borland C... */
# if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)
-# define PNG_MAX_MALLOC_64K
+# define PNG_MAX_MALLOC_64K /* only used in build */
# if (LDATA != 1)
# ifndef FAR
# define FAR __far
# endif
# define USE_FAR_KEYWORD
# endif /* LDATA != 1 */
- /* Possibly useful for moving data out of default segment.
- * Uncomment it if you want. Could also define FARDATA as
- * const if your compiler supports it. (SJT)
-# define FARDATA FAR
- */
+ /* Possibly useful for moving data out of default segment.
+ * Uncomment it if you want. Could also define FARDATA as
+ * const if your compiler supports it. (SJT)
+# define FARDATA FAR
+ */
# endif /* __WIN32__, __FLAT__, __CYGWIN__ */
#endif /* __BORLANDC__ */
*/
/* MSC Medium model */
-#if defined(FAR)
-# if defined(M_I86MM)
+#ifdef FAR
+# ifdef M_I86MM
# define USE_FAR_KEYWORD
# define FARDATA FAR
# include <dos.h>
#endif
/* Typedef for floating-point numbers that are converted
- to fixed-point with a multiple of 100,000, e.g., int_gamma */
+ * to fixed-point with a multiple of 100,000, e.g., gamma
+ */
typedef png_int_32 png_fixed_point;
/* Add typedefs for pointers */
-typedef void FAR * png_voidp;
-typedef png_byte FAR * png_bytep;
-typedef png_uint_32 FAR * png_uint_32p;
-typedef png_int_32 FAR * png_int_32p;
-typedef png_uint_16 FAR * png_uint_16p;
-typedef png_int_16 FAR * png_int_16p;
-typedef PNG_CONST char FAR * png_const_charp;
-typedef char FAR * png_charp;
-typedef png_fixed_point FAR * png_fixed_point_p;
-
-#ifndef PNG_NO_STDIO
-#if defined(_WIN32_WCE)
-typedef HANDLE png_FILE_p;
-#else
-typedef FILE * png_FILE_p;
-#endif
+typedef void FAR * png_voidp;
+typedef PNG_CONST void FAR * png_const_voidp;
+typedef png_byte FAR * png_bytep;
+typedef PNG_CONST png_byte FAR * png_const_bytep;
+typedef png_uint_32 FAR * png_uint_32p;
+typedef PNG_CONST png_uint_32 FAR * png_const_uint_32p;
+typedef png_int_32 FAR * png_int_32p;
+typedef PNG_CONST png_int_32 FAR * png_const_int_32p;
+typedef png_uint_16 FAR * png_uint_16p;
+typedef PNG_CONST png_uint_16 FAR * png_const_uint_16p;
+typedef png_int_16 FAR * png_int_16p;
+typedef PNG_CONST png_int_16 FAR * png_const_int_16p;
+typedef char FAR * png_charp;
+typedef PNG_CONST char FAR * png_const_charp;
+typedef png_fixed_point FAR * png_fixed_point_p;
+typedef PNG_CONST png_fixed_point FAR * png_const_fixed_point_p;
+typedef png_size_t FAR * png_size_tp;
+typedef PNG_CONST png_size_t FAR * png_const_size_tp;
+
+#ifdef PNG_STDIO_SUPPORTED
+typedef FILE * png_FILE_p;
#endif
#ifdef PNG_FLOATING_POINT_SUPPORTED
-typedef double FAR * png_doublep;
+typedef double FAR * png_doublep;
+typedef PNG_CONST double FAR * png_const_doublep;
#endif
/* Pointers to pointers; i.e. arrays */
/* Pointers to pointers to pointers; i.e., pointer to array */
typedef char FAR * FAR * FAR * png_charppp;
-/* libpng typedefs for types in zlib. If zlib changes
- * or another compression library is used, then change these.
- * Eliminates need to change all the source files.
- */
-typedef charf * png_zcharp;
-typedef charf * FAR * png_zcharpp;
-typedef z_stream FAR * png_zstreamp;
-
-/*
- * Define PNG_BUILD_DLL if the module being built is a Windows
- * LIBPNG DLL.
- *
- * Define PNG_USE_DLL if you want to *link* to the Windows LIBPNG DLL.
- * It is equivalent to Microsoft predefined macro _DLL that is
- * automatically defined when you compile using the share
- * version of the CRT (C Run-Time library)
- *
- * The cygwin mods make this behavior a little different:
- * Define PNG_BUILD_DLL if you are building a dll for use with cygwin
- * Define PNG_STATIC if you are building a static library for use with cygwin,
- * -or- if you are building an application that you want to link to the
- * static library.
- * PNG_USE_DLL is defined by default (no user action needed) unless one of
- * the other flags is defined.
- */
-
-#if !defined(PNG_DLL) && (defined(PNG_BUILD_DLL) || defined(PNG_USE_DLL))
-# define PNG_DLL
-#endif
-/* If CYGWIN, then disallow GLOBAL ARRAYS unless building a static lib.
- * When building a static lib, default to no GLOBAL ARRAYS, but allow
- * command-line override
- */
-#if defined(__CYGWIN__)
-# if !defined(PNG_STATIC)
-# if defined(PNG_USE_GLOBAL_ARRAYS)
-# undef PNG_USE_GLOBAL_ARRAYS
-# endif
-# if !defined(PNG_USE_LOCAL_ARRAYS)
-# define PNG_USE_LOCAL_ARRAYS
-# endif
-# else
-# if defined(PNG_USE_LOCAL_ARRAYS) || defined(PNG_NO_GLOBAL_ARRAYS)
-# if defined(PNG_USE_GLOBAL_ARRAYS)
-# undef PNG_USE_GLOBAL_ARRAYS
-# endif
-# endif
-# endif
-# if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
-# define PNG_USE_LOCAL_ARRAYS
-# endif
-#endif
-
-/* Do not use global arrays (helps with building DLL's)
- * They are no longer used in libpng itself, since version 1.0.5c,
- * but might be required for some pre-1.0.5c applications.
- */
-#if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
-# if defined(PNG_NO_GLOBAL_ARRAYS) || (defined(__GNUC__) && defined(PNG_DLL))
-# define PNG_USE_LOCAL_ARRAYS
-# else
-# define PNG_USE_GLOBAL_ARRAYS
-# endif
-#endif
-
-#if defined(__CYGWIN__) || defined(__WINE__)
-# undef PNGAPI
-# if defined(__WINE__)
-# define PNGAPI
-# else
-# define PNGAPI __cdecl
-# endif
-# undef PNG_IMPEXP
-# define PNG_IMPEXP
-#endif
-
-/* If you define PNGAPI, e.g., with compiler option "-DPNGAPI=__stdcall",
- * you may get warnings regarding the linkage of png_zalloc and png_zfree.
- * Don't ignore those warnings; you must also reset the default calling
- * convention in your compiler to match your PNGAPI, and you must build
- * zlib and your applications the same way you build libpng.
- */
-
-#ifndef PNGAPI
-
-#if defined(__MINGW32__) && !defined(PNG_MODULEDEF)
-# ifndef PNG_NO_MODULEDEF
-# define PNG_NO_MODULEDEF
-# endif
-#endif
-
-#if !defined(PNG_IMPEXP) && defined(PNG_BUILD_DLL) && !defined(PNG_NO_MODULEDEF)
-# define PNG_IMPEXP
-#endif
-
-#if defined(PNG_DLL) || defined(_DLL) || defined(__DLL__ ) || \
- (( defined(_Windows) || defined(_WINDOWS) || \
- defined(WIN32) || defined(_WIN32) || defined(__WIN32__) ))
-
-# if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
-# define PNGAPI __cdecl
+/* png_alloc_size_t is guaranteed to be no smaller than png_size_t,
+ * and no smaller than png_uint_32. Casts from png_size_t or png_uint_32
+ * to png_alloc_size_t are not necessary; in fact, it is recommended
+ * not to use them at all so that the compiler can complain when something
+ * turns out to be problematic.
+ * Casts in the other direction (from png_alloc_size_t to png_size_t or
+ * png_uint_32) should be explicitly applied; however, we do not expect
+ * to encounter practical situations that require such conversions.
+ */
+#if defined(__TURBOC__) && !defined(__FLAT__)
+ typedef unsigned long png_alloc_size_t;
+#else
+# if defined(_MSC_VER) && defined(MAXSEG_64K)
+ typedef unsigned long png_alloc_size_t;
# else
-# define PNGAPI _cdecl
-# endif
-
-# if !defined(PNG_IMPEXP) && (!defined(PNG_DLL) || \
- 0 /* WINCOMPILER_WITH_NO_SUPPORT_FOR_DECLIMPEXP */)
-# define PNG_IMPEXP
-# endif
-
-# if !defined(PNG_IMPEXP)
-
-# define PNG_EXPORT_TYPE1(type,symbol) PNG_IMPEXP type PNGAPI symbol
-# define PNG_EXPORT_TYPE2(type,symbol) type PNG_IMPEXP PNGAPI symbol
-
- /* Borland/Microsoft */
-# if defined(_MSC_VER) || defined(__BORLANDC__)
-# if (_MSC_VER >= 800) || (__BORLANDC__ >= 0x500)
-# define PNG_EXPORT PNG_EXPORT_TYPE1
-# else
-# define PNG_EXPORT PNG_EXPORT_TYPE2
-# if defined(PNG_BUILD_DLL)
-# define PNG_IMPEXP __export
-# else
-# define PNG_IMPEXP /*__import */ /* doesn't exist AFAIK in
- VC++ */
-# endif /* Exists in Borland C++ for
- C++ classes (== huge) */
-# endif
-# endif
-
-# if !defined(PNG_IMPEXP)
-# if defined(PNG_BUILD_DLL)
-# define PNG_IMPEXP __declspec(dllexport)
-# else
-# define PNG_IMPEXP __declspec(dllimport)
-# endif
-# endif
-# endif /* PNG_IMPEXP */
-#else /* !(DLL || non-cygwin WINDOWS) */
-# if (defined(__IBMC__) || defined(IBMCPP__)) && defined(__OS2__)
-# define PNGAPI _System
-# define PNG_IMPEXP
+ /* This is an attempt to detect an old Windows system where (int) is
+ * actually 16 bits, in that case png_malloc must have an argument with a
+ * bigger size to accomodate the requirements of the library.
+ */
+# if (defined(_Windows) || defined(_WINDOWS) || defined(_WINDOWS_)) && \
+ (!defined(INT_MAX) || INT_MAX <= 0x7ffffffeL)
+ typedef DWORD png_alloc_size_t;
# else
-# if 0 /* ... other platforms, with other meanings */
-# else
-# define PNGAPI
-# define PNG_IMPEXP
-# endif
+ typedef png_size_t png_alloc_size_t;
# endif
-#endif
-#endif
-
-#if defined(__VISAGECPP__)
-/* I don't compile with this _System linkage for wxWindows */
-# ifdef PNGAPI
-# undef PNGAPI
-# endif
-# define PNGAPI _Optlink
-# define PNG_IMPEXP
-# define PNG_USE_LOCAL_ARRAYS
-# ifdef PNG_USE_GLOBAL_ARRAYS
-# undef PNG_USE_GLOBAL_ARRAYS
-# endif
-extern const char png_libpng_ver[18];
-#endif
-
-#ifndef PNGAPI
-# define PNGAPI
-#endif
-#ifndef PNG_IMPEXP
-# define PNG_IMPEXP
-#endif
-
-#ifndef PNG_EXPORT
-# define PNG_EXPORT(type,symbol) PNG_IMPEXP type PNGAPI symbol
-#endif
-
-#ifdef PNG_USE_GLOBAL_ARRAYS
-# ifndef PNG_EXPORT_VAR
-# define PNG_EXPORT_VAR(type) extern PNG_IMPEXP type
# endif
#endif
-/* User may want to use these so they are not in PNG_INTERNAL. Any library
- * functions that are passed far data must be model independent.
- */
-
-#ifndef PNG_ABORT
-# define PNG_ABORT() abort()
-#endif
-
-#ifdef PNG_SETJMP_SUPPORTED
-# define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf)
-#else
-# define png_jmpbuf(png_ptr) \
- (LIBPNG_WAS_COMPILED_WITH__PNG_SETJMP_NOT_SUPPORTED)
-#endif
-
-#if defined(USE_FAR_KEYWORD) /* memory model independent fns */
-/* use this to make far-to-near assignments */
-# define CHECK 1
-# define NOCHECK 0
-# define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK))
-# define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK))
-# define png_strcpy _fstrcpy
-# define png_strlen _fstrlen
-# define png_memcmp _fmemcmp /* SJT: added */
-# define png_memcpy _fmemcpy
-# define png_memset _fmemset
-#else /* use the usual functions */
-# define CVT_PTR(ptr) (ptr)
-# define CVT_PTR_NOCHECK(ptr) (ptr)
-# define png_strcpy strcpy
-# define png_strlen strlen
-# define png_memcmp memcmp /* SJT: added */
-# define png_memcpy memcpy
-# define png_memset memset
-#endif
-/* End of memory model independent support */
-
-/* Just a little check that someone hasn't tried to define something
- * contradictory.
- */
-#if (PNG_ZBUF_SIZE > 65536) && defined(PNG_MAX_MALLOC_64K)
-# undef PNG_ZBUF_SIZE
-# define PNG_ZBUF_SIZE 65536
-#endif
-
-#ifdef PNG_READ_SUPPORTED
-/* Prior to libpng-1.0.9, this block was in pngasmrd.h */
-#if defined(PNG_INTERNAL)
-
-/* These are the default thresholds before the MMX code kicks in; if either
- * rowbytes or bitdepth is below the threshold, plain C code is used. These
- * can be overridden at runtime via the png_set_mmx_thresholds() call in
- * libpng 1.2.0 and later. The values below were chosen by Intel.
- */
-
-#ifndef PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT
-# define PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT 128 /* >= */
-#endif
-#ifndef PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT
-# define PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT 9 /* >= */
-#endif
-
-/* Set this in the makefile for VC++ on Pentium, not here. */
-/* Platform must be Pentium. Makefile must assemble and load pngvcrd.c .
- * MMX will be detected at run time and used if present.
- */
-#ifdef PNG_USE_PNGVCRD
-# define PNG_HAVE_ASSEMBLER_COMBINE_ROW
-# define PNG_HAVE_ASSEMBLER_READ_INTERLACE
-# define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
-#endif
-
-/* Set this in the makefile for gcc/as on Pentium, not here. */
-/* Platform must be Pentium. Makefile must assemble and load pnggccrd.c .
- * MMX will be detected at run time and used if present.
- */
-#ifdef PNG_USE_PNGGCCRD
-# define PNG_HAVE_ASSEMBLER_COMBINE_ROW
-# define PNG_HAVE_ASSEMBLER_READ_INTERLACE
-# define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
-#endif
-/* - see pnggccrd.c for info about what is currently enabled */
-
-#endif /* PNG_INTERNAL */
-#endif /* PNG_READ_SUPPORTED */
-
#endif /* PNGCONF_H */
-
projects / wxWidgets.git / blobdiff