/* pngconf.h - machine configurable file for libpng

 *

 * libpng version 1.4.0 - January 3, 2010

 * For conditions of distribution and use, see copyright notice in png.h

 * Copyright (c) 1998-2010 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

 * are configuring libpng for a machine, you may want to read the section

 * starting here down to where it starts to typedef png_color, png_text,

 * and png_info.

 */

#ifndef PNGCONF_H

#define PNGCONF_H

#ifndef PNG_NO_LIMITS_H

#  include <limits.h>

#endif

/* Added at libpng-1.2.9 */

/* config.h is created by and PNG_CONFIGURE_LIBPNG is set by the "configure" script. */

#ifdef PNG_CONFIGURE_LIBPNG

#  ifdef HAVE_CONFIG_H

#    include "config.h"

#  endif

#endif

/*

 * Added at libpng-1.2.8

 *

 * PNG_USER_CONFIG has to be defined on the compiler command line. This

 * includes the resource compiler for Windows DLL configurations.

 */

#ifdef PNG_USER_CONFIG

#  ifndef PNG_USER_PRIVATEBUILD

#    define PNG_USER_PRIVATEBUILD

#  endif

#  include "pngusr.h"

#endif

/*

 * If you create a private DLL you need to define in "pngusr.h" the followings:

 * #define PNG_USER_PRIVATEBUILD <Describes by whom and why this version of

 *        the DLL was built>

 *  e.g. #define PNG_USER_PRIVATEBUILD "Build by MyCompany for xyz reasons."

 * #define PNG_USER_DLLFNAME_POSTFIX <two-letter postfix that serve to

 *        distinguish your DLL from those of the official release. These

 *        correspond to the trailing letters that come after the version

 *        number and must match your private DLL name>

 *  e.g. // private DLL "libpng13gx.dll"

 *       #define PNG_USER_DLLFNAME_POSTFIX "gx"

 *

 * The following macros are also at your disposal if you want to complete the

 * DLL VERSIONINFO structure.

 * - PNG_USER_VERSIONINFO_COMMENTS

 * - PNG_USER_VERSIONINFO_COMPANYNAME

 * - PNG_USER_VERSIONINFO_LEGALTRADEMARKS

 */

#ifdef __STDC__

#  ifdef SPECIALBUILD

#    pragma message("PNG_LIBPNG_SPECIALBUILD (and deprecated SPECIALBUILD)\

     are now LIBPNG reserved macros. Use PNG_USER_PRIVATEBUILD instead.")

#  endif

#  ifdef PRIVATEBUILD

#    pragma message("PRIVATEBUILD is deprecated.\

     Use PNG_USER_PRIVATEBUILD instead.")

#    define PNG_USER_PRIVATEBUILD PRIVATEBUILD

#  endif

#endif /* __STDC__ */

/* End of material added to libpng-1.2.8 */

#ifndef PNG_VERSION_INFO_ONLY

/* 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

#endif

/* Enabled in 1.4.0. */

#ifdef PNG_ALLOW_BENIGN_ERRORS

#  define png_benign_error png_warning

#  define png_chunk_benign_error png_chunk_warning

#else

#  ifndef PNG_BENIGN_ERRORS_SUPPORTED

#    define png_benign_error png_error

#    define png_chunk_benign_error png_chunk_error

#  endif

#endif

/* Added at libpng version 1.4.0 */

#if !defined(PNG_NO_WARNINGS) && !defined(PNG_WARNINGS_SUPPORTED)

#  define PNG_WARNINGS_SUPPORTED

#endif

/* Added at libpng version 1.4.0 */

#if !defined(PNG_NO_ERROR_TEXT) && !defined(PNG_ERROR_TEXT_SUPPORTED)

#  define PNG_ERROR_TEXT_SUPPORTED

#endif

/* Added at libpng version 1.4.0 */

#if !defined(PNG_NO_CHECK_cHRM) && !defined(PNG_CHECK_cHRM_SUPPORTED)

#  define PNG_CHECK_cHRM_SUPPORTED

#endif

/* Added at libpng version 1.4.0 */

#if !defined(PNG_NO_ALIGNED_MEMORY) && !defined(PNG_ALIGNED_MEMORY_SUPPORTED)

#  define PNG_ALIGNED_MEMORY_SUPPORTED

#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 */

#ifndef PNG_NO_MNG_FEATURES

#  ifndef PNG_MNG_FEATURES_SUPPORTED

#    define PNG_MNG_FEATURES_SUPPORTED

#  endif

#endif

/* Added at libpng version 1.4.0 */

#ifndef PNG_NO_FLOATING_POINT_SUPPORTED

#  ifndef PNG_FLOATING_POINT_SUPPORTED

#    define PNG_FLOATING_POINT_SUPPORTED

#  endif

#endif

/* Added at libpng-1.4.0beta49 for testing (this test is no longer used

   in libpng and png_calloc() is always present)

 */

#define PNG_CALLOC_SUPPORTED

/* 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

 */

#if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)

#  define PNG_MAX_MALLOC_64K

#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.

 */

#ifdef __CYGWIN__

#  ifdef ALL_STATIC

#    ifdef PNG_BUILD_DLL

#      undef PNG_BUILD_DLL

#    endif

#    ifdef PNG_USE_DLL

#      undef PNG_USE_DLL

#    endif

#    ifdef PNG_DLL

#      undef PNG_DLL

#    endif

#    ifndef PNG_STATIC

#      define PNG_STATIC

#    endif

#  else

#    ifdef PNG_BUILD_DLL

#      ifdef PNG_STATIC

#        undef PNG_STATIC

#      endif

#      ifdef PNG_USE_DLL

#        undef PNG_USE_DLL

#      endif

#      ifndef PNG_DLL

#        define PNG_DLL

#      endif

#    else

#      ifdef PNG_STATIC

#        ifdef PNG_USE_DLL

#          undef PNG_USE_DLL

#        endif

#        ifdef PNG_DLL

#          undef PNG_DLL

#        endif

#      else

#        ifndef PNG_USE_DLL

#          define PNG_USE_DLL

#        endif

#        ifndef PNG_DLL

#          define PNG_DLL

#        endif

#      endif

#    endif

#  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

 */

#if !defined(PNG_NO_STDIO) && !defined(PNG_STDIO_SUPPORTED)

#  define PNG_STDIO_SUPPORTED

#endif

#ifdef PNG_BUILD_DLL

#  if !defined(PNG_CONSOLE_IO_SUPPORTED) && !defined(PNG_NO_CONSOLE_IO)

#    define PNG_NO_CONSOLE_IO

#  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

#    include <stdio.h>

#  endif

#if !(defined PNG_NO_CONSOLE_IO) && !defined(PNG_CONSOLE_IO_SUPPORTED)

#  define PNG_CONSOLE_IO_SUPPORTED

#endif

/* This 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

 * need to drag the empty declaration out in front of here, or change the

 * ifdef to suit your own needs.

 */

#ifndef PNGARG

#ifdef OF /* zlib prototype munger */

#  define PNGARG(arglist) OF(arglist)

#else

#ifdef _NO_PROTO

#  define PNGARG(arglist) ()

#else

#  define PNGARG(arglist) arglist

#endif /* _NO_PROTO */

#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

#  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

/* PNG_SETJMP_NOT_SUPPORTED and PNG_NO_SETJMP_SUPPORTED are deprecated. */

#if !defined(PNG_NO_SETJMP) && \

    !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.

 *

 * You can bypass this test if you know that your application uses exactly

 * the same setjmp.h that was included when libpng was built.  Only define

 * PNG_SKIP_SETJMP_CHECK while building your application, prior to the

 * application's '#include "png.h"'. Don't define PNG_SKIP_SETJMP_CHECK

 * while building a separate libpng library for general use.

 */

#  ifndef PNG_SKIP_SETJMP_CHECK

#    ifdef __linux__

#      ifdef _BSD_SOURCE

#        define PNG_SAVE_BSD_SOURCE

#        undef _BSD_SOURCE

#      endif

#      ifdef _SETJMP_H

       /* If you encounter a compiler error here, see the explanation

        * near the end of INSTALL.

        */

           __pngconf.h__ in libpng already includes setjmp.h;

           __dont__ include it again.;

#      endif

#    endif /* __linux__ */

#  endif /* PNG_SKIP_SETJMP_CHECK */

   /* Include setjmp.h for error handling */

#  include <setjmp.h>

#  ifdef __linux__

#    ifdef PNG_SAVE_BSD_SOURCE

#      ifdef _BSD_SOURCE

#        undef _BSD_SOURCE

#      endif

#      define _BSD_SOURCE

#      undef PNG_SAVE_BSD_SOURCE

#    endif

#  endif /* __linux__ */

#endif /* PNG_SETJMP_SUPPORTED */

#if defined(BSD) && !defined(VXWORKS)

#  include <strings.h>

#else

#  include <string.h>

#endif

/* Other defines for things like memory and the like can go here.  */

/* 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).

 */

#ifndef PNG_MAX_GAMMA_8

#  define PNG_MAX_GAMMA_8 11

#endif

/* 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

#endif

/* 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_CONST

#  ifndef PNG_NO_CONST

#    define PNG_CONST const

#  else

#    define PNG_CONST

#  endif

#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 PNG_NO_READ|WRITE_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 PNG_NO_READ|WRITE_TRANSFORMS

 * 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; PNG_*_TRANSFORMS_NOT_SUPPORTED deprecated in

 * 1.4.0)

 */

/* 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

#ifdef PNG_READ_SUPPORTED

/* PNG_READ_TRANSFORMS_NOT_SUPPORTED is deprecated. */

#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

#if 0 /* removed from libpng-1.4.0 */

#  ifndef PNG_NO_READ_DITHER

#    define PNG_READ_DITHER_SUPPORTED

#  endif

#endif /* 0 */

#  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