Subversion Repositories Kolibri OS

 *

 * libpng version 1.6.5 - September 14, 2013

 *

 * Copyright (c) 1998-2013 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

 *

 */

 * 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.

 */

#define PNGCONF_H

#ifdef PNG_SAFE_LIMITS_SUPPORTED

#  ifdef PNG_USER_WIDTH_MAX

#    undef PNG_USER_WIDTH_MAX

#    define PNG_USER_WIDTH_MAX 1000000L

#  endif

#  ifdef PNG_USER_HEIGHT_MAX

#    undef PNG_USER_HEIGHT_MAX

#    define PNG_USER_HEIGHT_MAX 1000000L

#  endif

#  ifdef PNG_USER_CHUNK_MALLOC_MAX

#    undef PNG_USER_CHUNK_MALLOC_MAX

#    define PNG_USER_CHUNK_MALLOC_MAX 4000000L

#  endif

#  ifdef PNG_USER_CHUNK_CACHE_MAX

#    undef PNG_USER_CHUNK_CACHE_MAX

#    define PNG_USER_CHUNK_CACHE_MAX 128

#  endif

#endif

 * compiler for correct compilation.  The following header files are required by

 * the standard.  If your compiler doesn't provide these header files, or they

 * do not match the standard, you will need to provide/improve them.

 */

#include 

#include 

 * expects conformant implementations, however, an ISOC90 conformant system need

 * not provide these header files if the functionality cannot be implemented.

 * In this case it will be necessary to disable the relevant parts of libpng in

 * the build of pnglibconf.h.

 *

 * Prior to 1.6.0 string.h was included here; the API changes in 1.6.0 to not

 * include this unnecessary header file.

 */

   /* Required for the definition of FILE: */

#  include 

#endif

   /* Required for the definition of jmp_buf and the declaration of longjmp: */

#  include 

#endif

   /* Required for struct tm: */

#  include 

#endif

 * PNG_NO_CONST; this is no longer supported except for data declarations which

 * apparently still cause problems in 2011 on some compilers.

 */

#define PNG_CONST const /* backward compatibility only */

 * from PNG files.  It can be set on a per-app-file basis - it

 * just changes whether a macro is used when 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

 *

 * 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.

 */

 * against legacy (pre ISOC90) compilers that did not understand function

 * prototypes.  It is not required for modern C compilers.

 */

#ifndef PNGARG

#  define PNGARG(arglist) arglist

#endif

 * =============================

 * 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.

 */

 * =============

 * 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.

 */

 * ==========================

 * 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 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__)

  /* Windows system (DOS doesn't support DLLs).  Includes builds under Cygwin or

   * MinGW on any architecture currently supported by Windows.  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

#    define PNGCAPI __cdecl

#    if PNG_API_RULE == 1

       /* If this line results in an error __stdcall is not understood and

        * PNG_API_RULE should not have been set to '1'.

        */

#      define PNGAPI __stdcall

#    endif

#  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

#    if PNG_API_RULE == 1 && !defined(PNGAPI)

#      define PNGAPI _stdcall

#    endif

#  endif /* compiler/api */

#     error "PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed"

#  endif

      (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 */

#  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 */

#ifndef PNGCAPI

#  define PNGCAPI

#endif

#ifndef PNGCBAPI

#  define PNGCBAPI PNGCAPI

#endif

#ifndef PNGAPI

#  define PNGAPI PNGCAPI

#endif

 * then in an internal header file when building the library, otherwise (when

 * using the library) it is set here.

 */

#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

#    define PNG_IMPEXP

#  endif

#endif

 * '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

#  define PNG_EXPORT_TYPE(type) PNG_IMPEXP type

#endif

    * table entries, so we discard it here.  See the .dfn files in the

    * scripts directory.

    */

#ifndef PNG_EXPORTA

      PNG_FUNCTION(PNG_EXPORT_TYPE(type),(PNGAPI name),PNGARG(args), \

        extern attributes)

#endif

 * so make something non-empty to satisfy the requirement:

 */

#define PNG_EMPTY /*empty list*/

   PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY)

#ifndef PNG_REMOVED

#  define PNG_REMOVED(ordinal, type, name, args, attributes)

#endif

#  define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) PNGARG(args)

#endif

 * 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.

 */

#  ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED

#    define PNG_PEDANTIC_WARNINGS_SUPPORTED

#  endif

#endif

  /* 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.  Disabling these removes the warnings but may also produce

   * less efficient code.

   */

#  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

#    if __GNUC__ >= 3

#      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

#      if ((__GNUC__ != 3) || !defined(__GNUC_MINOR__) || (__GNUC_MINOR__ >= 1))

#        ifndef PNG_RESTRICT

#          define PNG_RESTRICT __restrict

#        endif

#      endif /*  __GNUC__ == 3.0 */

#    endif /*  __GNUC__ >= 3 */

#    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

#    ifndef PNG_RESTRICT

#      if (_MSC_VER >= 1400)

#        define PNG_RESTRICT __restrict

#      endif

#    endif

#    ifndef PNG_RESTRICT

#      define PNG_RESTRICT __restrict

#    endif

#  endif /* _MSC_VER */

#endif /* PNG_PEDANTIC_WARNINGS */

#  define PNG_DEPRECATED  /* Use of this function is deprecated */

#endif

#ifndef PNG_USE_RESULT

#  define PNG_USE_RESULT  /* The result of this function must be checked */

#endif

#ifndef PNG_NORETURN

#  define PNG_NORETURN    /* This function does not return */

#endif

#ifndef PNG_ALLOCATED

#  define PNG_ALLOCATED   /* The result of the function is new memory */

#endif

#ifndef PNG_PRIVATE

#  define PNG_PRIVATE     /* This is a private libpng function */

#endif

#ifndef PNG_RESTRICT

#  define PNG_RESTRICT    /* The C99 "restrict" feature */

#endif

#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_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

/* Some typedefs to get us started.  These should be safe on most of the common

 * platforms.

 *

 * png_uint_32 and png_int_32 may, currently, be larger than required to hold a

 * 32-bit value however this is not normally advisable.

 *

 * png_uint_16 and png_int_16 should always be two bytes in size - this is

 * verified at library build time.

 *

 * png_byte must always be one byte in size.

 *

 * The checks below use constants from limits.h, as defined by the ISOC90

 * standard.

 */

#if CHAR_BIT == 8 && UCHAR_MAX == 255

   typedef unsigned char png_byte;

#else

#  error "libpng requires 8 bit bytes"

#endif

   typedef int png_int_16;

#elif SHRT_MIN == -32768 && SHRT_MAX == 32767

   typedef short png_int_16;

#else

#  error "libpng requires a signed 16 bit type"

#endif

   typedef unsigned int png_uint_16;

#elif USHRT_MAX == 65535

   typedef unsigned short png_uint_16;

#else

#  error "libpng requires an unsigned 16 bit type"

#endif

   typedef int png_int_32;

#elif LONG_MIN < -2147483646 && LONG_MAX > 2147483646

   typedef long int png_int_32;

#else

#  error "libpng requires a signed 32 bit (or more) type"

#endif

   typedef unsigned int png_uint_32;

#elif ULONG_MAX > 4294967294

   typedef unsigned long int png_uint_32;

#else

#  error "libpng requires an unsigned 32 bit (or more) type"

#endif

 * requires an ISOC90 compiler and relies on consistent behavior of sizeof.

 */

typedef size_t png_size_t;

typedef ptrdiff_t png_ptrdiff_t;

 * definition of png_alloc_size_t, below.  This maximum value of size_t limits

 * but does not control the maximum allocations the library makes - there is

 * direct application control of this through png_set_user_limits().

 */

#ifndef PNG_SMALL_SIZE_T

   /* Compiler specific tests for systems where size_t is known to be less than

    * 32 bits (some of these systems may no longer work because of the lack of

    * 'far' support; see above.)

    */

#  if (defined(__TURBOC__) && !defined(__FLAT__)) ||\

   (defined(_MSC_VER) && defined(MAXSEG_64K))

#     define PNG_SMALL_SIZE_T

#  endif

#endif

 * 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.

 *

 * PNG_SMALL_SIZE_T must be defined if the maximum value of size_t is less than

 * 4294967295 - i.e. less than the maximum value of png_uint_32.

 */

#ifdef PNG_SMALL_SIZE_T

   typedef png_uint_32 png_alloc_size_t;

#else

   typedef png_size_t png_alloc_size_t;

#endif

 * implementations of Intel CPU specific support of user-mode segmented address

 * spaces, where 16-bit pointers address more than 65536 bytes of memory using

 * separate 'segment' registers.  The implementation requires two different

 * types of pointer (only one of which includes the segment value.)

 *

 * If required this support is available in version 1.2 of libpng and may be

 * available in versions through 1.5, although the correctness of the code has

 * not been verified recently.

 */

 * multiple of 100,000, e.g., gamma

 */

typedef png_int_32 png_fixed_point;

typedef void                  * png_voidp;

typedef const void            * png_const_voidp;

typedef png_byte              * png_bytep;

typedef const png_byte        * png_const_bytep;

typedef png_uint_32           * png_uint_32p;

typedef const png_uint_32     * png_const_uint_32p;

typedef png_int_32            * png_int_32p;

typedef const png_int_32      * png_const_int_32p;

typedef png_uint_16           * png_uint_16p;

typedef const png_uint_16     * png_const_uint_16p;

typedef png_int_16            * png_int_16p;

typedef const png_int_16      * png_const_int_16p;

typedef char                  * png_charp;

typedef const char            * png_const_charp;

typedef png_fixed_point       * png_fixed_point_p;

typedef const png_fixed_point * png_const_fixed_point_p;

typedef png_size_t            * png_size_tp;

typedef const png_size_t      * png_const_size_tp;

typedef FILE            * png_FILE_p;

#endif

typedef double       * png_doublep;

typedef const double * png_const_doublep;

#endif

typedef png_byte        * * png_bytepp;

typedef png_uint_32     * * png_uint_32pp;

typedef png_int_32      * * png_int_32pp;

typedef png_uint_16     * * png_uint_16pp;

typedef png_int_16      * * png_int_16pp;

typedef const char      * * png_const_charpp;

typedef char            * * png_charpp;

typedef png_fixed_point * * png_fixed_point_pp;

#ifdef PNG_FLOATING_POINT_SUPPORTED

typedef double          * * png_doublepp;

#endif

typedef char            * * * png_charppp;