/* pngconf.h - machine configurable file for libpng

 *

 * libpng version 1.2.57, December 29, 2016

 *

 * Copyright (c) 1998-2015 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

#define PNG_1_2_X

/*

 * 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

/* PNG_CONFIGURE_LIBPNG is set by the "configure" script. */

#ifdef PNG_CONFIGURE_LIBPNG

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#else

/* pngconf.h is part of the exported API. When a libpng-using application

   includes us, PNG_CONFIGURE_LIBPNG is of course not defined as we do not have

   libpng's config.h available in this case. This means that we do not have the

   defines added to config.h and the commandline by libpng's ./configure .

   For all defines from config.h not having them set is not a problem, however

   ./configure also adds -DPNG_NO_ASSEMBLER_CODE to the CFLAGS when compiling

   on a platform on which the MMX and SSE asm code in libpng is not supported.

   We do need this define as this define is used to determine whether or not

   to define PNG_ASSEMBLER_CODE_SUPPORTED and other assembler related defines

   and prototypes. PNG_ASSEMBLER_CODE_SUPPORTED in turn is used by applications

   (ImageMagick for example) to determine whether or not they can use the asm

   functions. Thus we need to define PNG_NO_ASSEMBLER_CODE here on platforms

   on which the MMX and SSE asm code in libpng is not supported: */

#ifndef __i386__ /* change this if MMX/SSE become supported on x86_64! */

#define PNG_NO_ASSEMBLER_CODE

#endif

#endif

/*

 * Added at libpng-1.2.8

 *

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

 * #define PNG_USER_PRIVATEBUILD 

 *        the DLL was built>

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

 * #define PNG_USER_DLLFNAME_POSTFIX 

 *        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__ */

#ifndef PNG_VERSION_INFO_ONLY

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

/* Added at libpng-1.2.19, removed at libpng-1.2.20 because it caused trouble

   Restored at libpng-1.2.21 */

#if !defined(PNG_NO_WARN_UNINITIALIZED_ROW) && \

    !defined(PNG_WARN_UNINITIALIZED_ROW)

#  define PNG_WARN_UNINITIALIZED_ROW 1

#endif

/* End of material added at libpng-1.2.19/1.2.21 */

/* Added at libpng-1.2.51 (ported from 1.4.6) */

#ifndef PNG_UNUSED

/* Unused formal parameter warnings are silenced using the following macro

 * which is expected to have no bad effects on performance (optimizing

 * compilers will probably remove it entirely).  Note that if you replace

 * it with something other than whitespace, you must include the terminating

 * semicolon.

 */

#  define PNG_UNUSED(param) (void)param;

#endif

/* End of material added to libpng-1.4.6 */

/* 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 1.2.41. */

#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 in libpng-1.2.41 */

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

#  define PNG_WARNINGS_SUPPORTED

#endif

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

#  define PNG_ERROR_TEXT_SUPPORTED

#endif

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

#  define PNG_CHECK_cHRM_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

 */

#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

 */

#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 and whether GLOBAL_ARRAYS are allowed.

 */

#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 _WIN32_WCE

#  include <windows.h>

   /* Console I/O functions are not supported on WindowsCE */

#  define PNG_NO_CONSOLE_IO

   /* abort() may not be supported on some/all Windows CE platforms */

#  define PNG_ABORT() exit(-1)

#  ifdef PNG_DEBUG

#    undef PNG_DEBUG

#  endif

#endif

#ifdef PNG_BUILD_DLL

#  ifndef PNG_CONSOLE_IO_SUPPORTED

#    ifndef PNG_NO_CONSOLE_IO

#      define PNG_NO_CONSOLE_IO

#    endif

#  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

#    ifndef _WIN32_WCE

/* "stdio.h" functions are not supported on WindowsCE */

#      include <stdio.h>

#    endif

#  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) ()

#  ifndef PNG_TYPECAST_NULL

#     define PNG_TYPECAST_NULL

#  endif

#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

#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.

 *

 * 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

#      ifndef _BSD_SOURCE

#        define _BSD_SOURCE

#      endif

#      undef PNG_SAVE_BSD_SOURCE

#    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.

 */

#ifdef PNG_FLOATING_POINT_SUPPORTED

#  ifdef 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>

#  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

/* This provides the non-ANSI (far) memory allocation routines. */

#if defined(__TURBOC__) && defined(__MSDOS__)

#  include <mem.h>

#  include <alloc.h>

#endif

/* I have no idea why is this necessary... */

#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).

 */

#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

#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

#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 support was added.  iTXt support was turned off by default through

 * libpng-1.2.x, 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-1.4.0.

 */

#if defined(PNG_1_0_X) || defined (PNG_1_2_X)

#  ifndef PNG_NO_iTXt_SUPPORTED

#    define PNG_NO_iTXt_SUPPORTED

#  endif

#  ifndef PNG_NO_READ_iTXt

#    define PNG_NO_READ_iTXt

#  endif

#  ifndef PNG_NO_WRITE_iTXt

#    define PNG_NO_WRITE_iTXt

#  endif

#endif

#if !defined(PNG_NO_iTXt_SUPPORTED)

#  if !defined(PNG_READ_iTXt_SUPPORTED) && !defined(PNG_NO_READ_iTXt)

#    define PNG_READ_iTXt

#  endif

#  if !defined(PNG_WRITE_iTXt_SUPPORTED) && !defined(PNG_NO_WRITE_iTXt)

#    define PNG_WRITE_iTXt

#  endif

#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.

 */

#ifdef PNG_LEGACY_SUPPORTED

#  define PNG_NO_FREE_ME

#  define PNG_NO_READ_UNKNOWN_CHUNKS

#  define PNG_NO_WRITE_UNKNOWN_CHUNKS

#  define PNG_NO_HANDLE_AS_UNKNOWN

#  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

#ifdef 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 */

/* PNG_PROGRESSIVE_READ_NOT_SUPPORTED is deprecated. */

#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 define: */

#define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */

/* PNG_NO_SEQUENTIAL_READ_SUPPORTED is deprecated. */

#if !defined(PNG_NO_SEQUENTIAL_READ) && \

    !defined(PNG_SEQUENTIAL_READ_SUPPORTED) && \

    !defined(PNG_NO_SEQUENTIAL_READ_SUPPORTED)

#  define PNG_SEQUENTIAL_READ_SUPPORTED

#endif

#define PNG_READ_INTERLACING_SUPPORTED /* required in 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

#if defined(PNG_1_0_X) || defined (PNG_1_2_X)

/* 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

#endif /* PNG_READ_SUPPORTED */

#ifdef 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_1_0_X

#  ifndef PNG_NO_WRITE_INVERT_ALPHA

#    define PNG_WRITE_INVERT_ALPHA_SUPPORTED

#  endif

#endif

#  ifndef PNG_NO_WRITE_USER_TRANSFORM

#    define PNG_WRITE_USER_TRANSFORM_SUPPORTED

#  endif

#endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */

#if !defined(PNG_NO_WRITE_INTERLACING_SUPPORTED) && \

    !defined(PNG_WRITE_INTERLACING_SUPPORTED)

#define PNG_WRITE_INTERLACING_SUPPORTED  /* not required for PNG-compliant

                                            encoders, but can cause trouble

                                            if left undefined */

#endif

#if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \

    !defined(PNG_WRITE_WEIGHTED_FILTER) && \

     defined(PNG_FLOATING_POINT_SUPPORTED)

#  define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED

#endif

#ifndef PNG_NO_WRITE_FLUSH

#  define PNG_WRITE_FLUSH_SUPPORTED

#endif

#if defined(PNG_1_0_X) || defined (PNG_1_2_X)

/* Deprecated, see PNG_MNG_FEATURES_SUPPORTED, above */

#ifndef PNG_NO_WRITE_EMPTY_PLTE

#  define PNG_WRITE_EMPTY_PLTE_SUPPORTED

#endif

#endif

#endif /* PNG_WRITE_SUPPORTED */

#ifndef PNG_1_0_X

#  ifndef PNG_NO_ERROR_NUMBERS

#    define PNG_ERROR_NUMBERS_SUPPORTED

#  endif

#endif /* PNG_1_0_X */

#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

#  endif

#endif

#ifndef PNG_NO_STDIO

#  define PNG_TIME_RFC1123_SUPPORTED

#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()

 */

#if !defined(PNG_NO_EASY_ACCESS) && !defined(PNG_EASY_ACCESS_SUPPORTED)

#  define PNG_EASY_ACCESS_SUPPORTED

#endif

/* PNG_ASSEMBLER_CODE was enabled by default in version 1.2.0

 * and removed from version 1.2.20.  The following will be removed

 * from libpng-1.4.0

*/

#if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_OPTIMIZED_CODE)

#  ifndef PNG_OPTIMIZED_CODE_SUPPORTED

#    define PNG_OPTIMIZED_CODE_SUPPORTED

#  endif

#endif

#if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_ASSEMBLER_CODE)

#  ifndef PNG_ASSEMBLER_CODE_SUPPORTED

#    define PNG_ASSEMBLER_CODE_SUPPORTED

#  endif

#  if defined(__GNUC__) && defined(__x86_64__) && (__GNUC__ < 4)

     /* work around 64-bit gcc compiler bugs in gcc-3.x */

#    if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)

#      define PNG_NO_MMX_CODE

#    endif

#  endif

#  ifdef __APPLE__

#    if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)

#      define PNG_NO_MMX_CODE

#    endif

#  endif

#  if (defined(__MWERKS__) && ((__MWERKS__ < 0x0900) || macintosh))

#    if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)

#      define PNG_NO_MMX_CODE

#    endif

#  endif

#  if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)

#    define PNG_MMX_CODE_SUPPORTED

#  endif

#endif

/* end of obsolete code to be removed from libpng-1.4.0 */

/* Added at libpng-1.2.0 */

#ifndef PNG_1_0_X

#if !defined(PNG_NO_USER_MEM) && !defined(PNG_USER_MEM_SUPPORTED)

#  define PNG_USER_MEM_SUPPORTED

#endif

#endif /* PNG_1_0_X */

/* Added at libpng-1.2.6 */

#ifndef PNG_1_0_X

#  ifndef PNG_SET_USER_LIMITS_SUPPORTED

#    ifndef PNG_NO_SET_USER_LIMITS

#      define PNG_SET_USER_LIMITS_SUPPORTED

#    endif

#  endif

#endif /* PNG_1_0_X */