| 1 | /* pngconf.h - machine-configurable file for libpng
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| 2 | *
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| 3 | * libpng version 1.6.45
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| 4 | *
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| 5 | * Copyright (c) 2018-2025 Cosmin Truta
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| 6 | * Copyright (c) 1998-2002,2004,2006-2016,2018 Glenn Randers-Pehrson
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| 7 | * Copyright (c) 1996-1997 Andreas Dilger
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| 8 | * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
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| 9 | *
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| 10 | * This code is released under the libpng license.
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| 11 | * For conditions of distribution and use, see the disclaimer
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| 12 | * and license in png.h
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| 13 | *
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| 14 | * Any machine specific code is near the front of this file, so if you
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| 15 | * are configuring libpng for a machine, you may want to read the section
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| 16 | * starting here down to where it starts to typedef png_color, png_text,
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| 17 | * and png_info.
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| 18 | */
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| 19 |
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| 20 | #ifndef PNGCONF_H
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| 21 | #define PNGCONF_H
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| 22 |
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| 23 | #ifndef PNG_BUILDING_SYMBOL_TABLE /* else includes may cause problems */
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| 24 |
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| 25 | /* From libpng 1.6.0 libpng requires an ANSI X3.159-1989 ("ISOC90") compliant C
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| 26 | * compiler for correct compilation. The following header files are required by
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| 27 | * the standard. If your compiler doesn't provide these header files, or they
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| 28 | * do not match the standard, you will need to provide/improve them.
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| 29 | */
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| 30 | #include <limits.h>
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| 31 | #include <stddef.h>
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| 32 |
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| 33 | /* Library header files. These header files are all defined by ISOC90; libpng
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| 34 | * expects conformant implementations, however, an ISOC90 conformant system need
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| 35 | * not provide these header files if the functionality cannot be implemented.
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| 36 | * In this case it will be necessary to disable the relevant parts of libpng in
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| 37 | * the build of pnglibconf.h.
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| 38 | *
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| 39 | * Prior to 1.6.0 string.h was included here; the API changes in 1.6.0 to not
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| 40 | * include this unnecessary header file.
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| 41 | */
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| 42 |
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| 43 | #ifdef PNG_STDIO_SUPPORTED
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| 44 | /* Required for the definition of FILE: */
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| 45 | # include <stdio.h>
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| 46 | #endif
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| 47 |
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| 48 | #ifdef PNG_SETJMP_SUPPORTED
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| 49 | /* Required for the definition of jmp_buf and the declaration of longjmp: */
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| 50 | # include <setjmp.h>
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| 51 | #endif
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| 52 |
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| 53 | #ifdef PNG_CONVERT_tIME_SUPPORTED
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| 54 | /* Required for struct tm: */
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| 55 | # include <time.h>
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| 56 | #endif
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| 57 |
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| 58 | #endif /* PNG_BUILDING_SYMBOL_TABLE */
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| 59 |
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| 60 | /* Prior to 1.6.0, it was possible to turn off 'const' in declarations,
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| 61 | * using PNG_NO_CONST. This is no longer supported.
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| 62 | */
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| 63 | #define PNG_CONST const /* backward compatibility only */
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| 64 |
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| 65 | /* This controls optimization of the reading of 16-bit and 32-bit
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| 66 | * values from PNG files. It can be set on a per-app-file basis: it
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| 67 | * just changes whether a macro is used when the function is called.
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| 68 | * The library builder sets the default; if read functions are not
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| 69 | * built into the library the macro implementation is forced on.
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| 70 | */
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| 71 | #ifndef PNG_READ_INT_FUNCTIONS_SUPPORTED
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| 72 | # define PNG_USE_READ_MACROS
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| 73 | #endif
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| 74 | #if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS)
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| 75 | # if PNG_DEFAULT_READ_MACROS
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| 76 | # define PNG_USE_READ_MACROS
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| 77 | # endif
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| 78 | #endif
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| 79 |
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| 80 | /* COMPILER SPECIFIC OPTIONS.
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| 81 | *
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| 82 | * These options are provided so that a variety of difficult compilers
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| 83 | * can be used. Some are fixed at build time (e.g. PNG_API_RULE
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| 84 | * below) but still have compiler specific implementations, others
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| 85 | * may be changed on a per-file basis when compiling against libpng.
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| 86 | */
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| 87 |
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| 88 | /* The PNGARG macro was used in versions of libpng prior to 1.6.0 to protect
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| 89 | * against legacy (pre ISOC90) compilers that did not understand function
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| 90 | * prototypes. [Deprecated.]
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| 91 | */
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| 92 | #ifndef PNGARG
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| 93 | # define PNGARG(arglist) arglist
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| 94 | #endif
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| 95 |
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| 96 | /* Function calling conventions.
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| 97 | * =============================
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| 98 | * Normally it is not necessary to specify to the compiler how to call
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| 99 | * a function - it just does it - however on x86 systems derived from
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| 100 | * Microsoft and Borland C compilers ('IBM PC', 'DOS', 'Windows' systems
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| 101 | * and some others) there are multiple ways to call a function and the
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| 102 | * default can be changed on the compiler command line. For this reason
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| 103 | * libpng specifies the calling convention of every exported function and
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| 104 | * every function called via a user supplied function pointer. This is
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| 105 | * done in this file by defining the following macros:
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| 106 | *
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| 107 | * PNGAPI Calling convention for exported functions.
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| 108 | * PNGCBAPI Calling convention for user provided (callback) functions.
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| 109 | * PNGCAPI Calling convention used by the ANSI-C library (required
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| 110 | * for longjmp callbacks and sometimes used internally to
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| 111 | * specify the calling convention for zlib).
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| 112 | *
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| 113 | * These macros should never be overridden. If it is necessary to
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| 114 | * change calling convention in a private build this can be done
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| 115 | * by setting PNG_API_RULE (which defaults to 0) to one of the values
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| 116 | * below to select the correct 'API' variants.
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| 117 | *
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| 118 | * PNG_API_RULE=0 Use PNGCAPI - the 'C' calling convention - throughout.
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| 119 | * This is correct in every known environment.
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| 120 | * PNG_API_RULE=1 Use the operating system convention for PNGAPI and
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| 121 | * the 'C' calling convention (from PNGCAPI) for
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| 122 | * callbacks (PNGCBAPI). This is no longer required
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| 123 | * in any known environment - if it has to be used
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| 124 | * please post an explanation of the problem to the
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| 125 | * libpng mailing list.
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| 126 | *
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| 127 | * These cases only differ if the operating system does not use the C
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| 128 | * calling convention, at present this just means the above cases
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| 129 | * (x86 DOS/Windows systems) and, even then, this does not apply to
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| 130 | * Cygwin running on those systems.
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| 131 | *
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| 132 | * Note that the value must be defined in pnglibconf.h so that what
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| 133 | * the application uses to call the library matches the conventions
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| 134 | * set when building the library.
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| 135 | */
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| 136 |
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| 137 | /* Symbol export
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| 138 | * =============
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| 139 | * When building a shared library it is almost always necessary to tell
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| 140 | * the compiler which symbols to export. The png.h macro 'PNG_EXPORT'
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| 141 | * is used to mark the symbols. On some systems these symbols can be
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| 142 | * extracted at link time and need no special processing by the compiler,
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| 143 | * on other systems the symbols are flagged by the compiler and just
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| 144 | * the declaration requires a special tag applied (unfortunately) in a
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| 145 | * compiler dependent way. Some systems can do either.
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| 146 | *
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| 147 | * A small number of older systems also require a symbol from a DLL to
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| 148 | * be flagged to the program that calls it. This is a problem because
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| 149 | * we do not know in the header file included by application code that
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| 150 | * the symbol will come from a shared library, as opposed to a statically
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| 151 | * linked one. For this reason the application must tell us by setting
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| 152 | * the magic flag PNG_USE_DLL to turn on the special processing before
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| 153 | * it includes png.h.
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| 154 | *
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| 155 | * Four additional macros are used to make this happen:
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| 156 | *
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| 157 | * PNG_IMPEXP The magic (if any) to cause a symbol to be exported from
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| 158 | * the build or imported if PNG_USE_DLL is set - compiler
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| 159 | * and system specific.
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| 160 | *
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| 161 | * PNG_EXPORT_TYPE(type) A macro that pre or appends PNG_IMPEXP to
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| 162 | * 'type', compiler specific.
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| 163 | *
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| 164 | * PNG_DLL_EXPORT Set to the magic to use during a libpng build to
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| 165 | * make a symbol exported from the DLL. Not used in the
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| 166 | * public header files; see pngpriv.h for how it is used
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| 167 | * in the libpng build.
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| 168 | *
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| 169 | * PNG_DLL_IMPORT Set to the magic to force the libpng symbols to come
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| 170 | * from a DLL - used to define PNG_IMPEXP when
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| 171 | * PNG_USE_DLL is set.
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| 172 | */
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| 173 |
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| 174 | /* System specific discovery.
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| 175 | * ==========================
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| 176 | * This code is used at build time to find PNG_IMPEXP, the API settings
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| 177 | * and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL
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| 178 | * import processing is possible. On Windows systems it also sets
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| 179 | * compiler-specific macros to the values required to change the calling
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| 180 | * conventions of the various functions.
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| 181 | */
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| 182 | #if defined(_WIN32) || defined(__WIN32__) || defined(__NT__) || \
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| 183 | defined(__CYGWIN__)
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| 184 | /* Windows system (DOS doesn't support DLLs). Includes builds under Cygwin or
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| 185 | * MinGW on any architecture currently supported by Windows. Also includes
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| 186 | * Watcom builds but these need special treatment because they are not
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| 187 | * compatible with GCC or Visual C because of different calling conventions.
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| 188 | */
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| 189 | # if PNG_API_RULE == 2
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| 190 | /* If this line results in an error, either because __watcall is not
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| 191 | * understood or because of a redefine just below you cannot use *this*
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| 192 | * build of the library with the compiler you are using. *This* build was
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| 193 | * build using Watcom and applications must also be built using Watcom!
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| 194 | */
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| 195 | # define PNGCAPI __watcall
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| 196 | # endif
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| 197 |
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| 198 | # if defined(__GNUC__) || (defined(_MSC_VER) && (_MSC_VER >= 800))
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| 199 | # define PNGCAPI __cdecl
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| 200 | # if PNG_API_RULE == 1
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| 201 | /* If this line results in an error __stdcall is not understood and
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| 202 | * PNG_API_RULE should not have been set to '1'.
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| 203 | */
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| 204 | # define PNGAPI __stdcall
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| 205 | # endif
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| 206 | # else
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| 207 | /* An older compiler, or one not detected (erroneously) above,
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| 208 | * if necessary override on the command line to get the correct
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| 209 | * variants for the compiler.
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| 210 | */
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| 211 | # ifndef PNGCAPI
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| 212 | # define PNGCAPI _cdecl
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| 213 | # endif
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| 214 | # if PNG_API_RULE == 1 && !defined(PNGAPI)
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| 215 | # define PNGAPI _stdcall
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| 216 | # endif
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| 217 | # endif /* compiler/api */
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| 218 |
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| 219 | /* NOTE: PNGCBAPI always defaults to PNGCAPI. */
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| 220 |
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| 221 | # if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD)
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| 222 | # error "PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed"
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| 223 | # endif
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| 224 |
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| 225 | # if (defined(_MSC_VER) && _MSC_VER < 800) ||\
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| 226 | (defined(__BORLANDC__) && __BORLANDC__ < 0x500)
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| 227 | /* older Borland and MSC
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| 228 | * compilers used '__export' and required this to be after
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| 229 | * the type.
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| 230 | */
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| 231 | # ifndef PNG_EXPORT_TYPE
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| 232 | # define PNG_EXPORT_TYPE(type) type PNG_IMPEXP
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| 233 | # endif
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| 234 | # define PNG_DLL_EXPORT __export
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| 235 | # else /* newer compiler */
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| 236 | # define PNG_DLL_EXPORT __declspec(dllexport)
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| 237 | # ifndef PNG_DLL_IMPORT
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| 238 | # define PNG_DLL_IMPORT __declspec(dllimport)
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| 239 | # endif
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| 240 | # endif /* compiler */
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| 241 |
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| 242 | #else /* !Windows */
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| 243 | # if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
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| 244 | # define PNGAPI _System
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| 245 | # else /* !Windows/x86 && !OS/2 */
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| 246 | /* Use the defaults, or define PNG*API on the command line (but
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| 247 | * this will have to be done for every compile!)
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| 248 | */
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| 249 | # endif /* other system, !OS/2 */
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| 250 | #endif /* !Windows/x86 */
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| 251 |
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| 252 | /* Now do all the defaulting . */
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| 253 | #ifndef PNGCAPI
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| 254 | # define PNGCAPI
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| 255 | #endif
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| 256 | #ifndef PNGCBAPI
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| 257 | # define PNGCBAPI PNGCAPI
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| 258 | #endif
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| 259 | #ifndef PNGAPI
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| 260 | # define PNGAPI PNGCAPI
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| 261 | #endif
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| 262 |
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| 263 | /* PNG_IMPEXP may be set on the compilation system command line or (if not set)
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| 264 | * then in an internal header file when building the library, otherwise (when
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| 265 | * using the library) it is set here.
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| 266 | */
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| 267 | #ifndef PNG_IMPEXP
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| 268 | # if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT)
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| 269 | /* This forces use of a DLL, disallowing static linking */
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| 270 | # define PNG_IMPEXP PNG_DLL_IMPORT
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| 271 | # endif
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| 272 |
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| 273 | # ifndef PNG_IMPEXP
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| 274 | # define PNG_IMPEXP
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| 275 | # endif
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| 276 | #endif
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| 277 |
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| 278 | /* In 1.5.2 the definition of PNG_FUNCTION has been changed to always treat
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| 279 | * 'attributes' as a storage class - the attributes go at the start of the
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| 280 | * function definition, and attributes are always appended regardless of the
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| 281 | * compiler. This considerably simplifies these macros but may cause problems
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| 282 | * if any compilers both need function attributes and fail to handle them as
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| 283 | * a storage class (this is unlikely.)
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| 284 | */
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| 285 | #ifndef PNG_FUNCTION
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| 286 | # define PNG_FUNCTION(type, name, args, attributes) attributes type name args
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| 287 | #endif
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| 288 |
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| 289 | #ifndef PNG_EXPORT_TYPE
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| 290 | # define PNG_EXPORT_TYPE(type) PNG_IMPEXP type
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| 291 | #endif
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| 292 |
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| 293 | /* The ordinal value is only relevant when preprocessing png.h for symbol
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| 294 | * table entries, so we discard it here. See the .dfn files in the
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| 295 | * scripts directory.
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| 296 | */
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| 297 |
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| 298 | #ifndef PNG_EXPORTA
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| 299 | # define PNG_EXPORTA(ordinal, type, name, args, attributes) \
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| 300 | PNG_FUNCTION(PNG_EXPORT_TYPE(type), (PNGAPI name), args, \
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| 301 | PNG_LINKAGE_API attributes)
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| 302 | #endif
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| 303 |
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| 304 | /* ANSI-C (C90) does not permit a macro to be invoked with an empty argument,
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| 305 | * so make something non-empty to satisfy the requirement:
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| 306 | */
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| 307 | #define PNG_EMPTY /*empty list*/
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| 308 |
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| 309 | #define PNG_EXPORT(ordinal, type, name, args) \
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| 310 | PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY)
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| 311 |
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| 312 | /* Use PNG_REMOVED to comment out a removed interface. */
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| 313 | #ifndef PNG_REMOVED
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| 314 | # define PNG_REMOVED(ordinal, type, name, args, attributes)
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| 315 | #endif
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| 316 |
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| 317 | #ifndef PNG_CALLBACK
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| 318 | # define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) args
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| 319 | #endif
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| 320 |
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| 321 | /* Support for compiler specific function attributes. These are used
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| 322 | * so that where compiler support is available incorrect use of API
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| 323 | * functions in png.h will generate compiler warnings.
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| 324 | *
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| 325 | * Added at libpng-1.2.41.
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| 326 | */
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| 327 |
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| 328 | #ifndef PNG_NO_PEDANTIC_WARNINGS
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| 329 | # ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED
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| 330 | # define PNG_PEDANTIC_WARNINGS_SUPPORTED
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| 331 | # endif
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| 332 | #endif
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| 333 |
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| 334 | #ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED
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| 335 | /* Support for compiler specific function attributes. These are used
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| 336 | * so that where compiler support is available, incorrect use of API
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| 337 | * functions in png.h will generate compiler warnings. Added at libpng
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| 338 | * version 1.2.41. Disabling these removes the warnings but may also produce
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| 339 | * less efficient code.
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| 340 | */
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| 341 | # if defined(__clang__) && defined(__has_attribute)
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| 342 | /* Clang defines both __clang__ and __GNUC__. Check __clang__ first. */
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| 343 | # if !defined(PNG_USE_RESULT) && __has_attribute(__warn_unused_result__)
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| 344 | # define PNG_USE_RESULT __attribute__((__warn_unused_result__))
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| 345 | # endif
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| 346 | # if !defined(PNG_NORETURN) && __has_attribute(__noreturn__)
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| 347 | # define PNG_NORETURN __attribute__((__noreturn__))
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| 348 | # endif
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| 349 | # if !defined(PNG_ALLOCATED) && __has_attribute(__malloc__)
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| 350 | # define PNG_ALLOCATED __attribute__((__malloc__))
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| 351 | # endif
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| 352 | # if !defined(PNG_DEPRECATED) && __has_attribute(__deprecated__)
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| 353 | # define PNG_DEPRECATED __attribute__((__deprecated__))
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| 354 | # endif
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| 355 | # if !defined(PNG_PRIVATE)
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| 356 | # ifdef __has_extension
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| 357 | # if __has_extension(attribute_unavailable_with_message)
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| 358 | # define PNG_PRIVATE __attribute__((__unavailable__(\
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| 359 | "This function is not exported by libpng.")))
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| 360 | # endif
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| 361 | # endif
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| 362 | # endif
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| 363 | # ifndef PNG_RESTRICT
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| 364 | # define PNG_RESTRICT __restrict
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| 365 | # endif
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| 366 |
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| 367 | # elif defined(__GNUC__)
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| 368 | # ifndef PNG_USE_RESULT
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| 369 | # define PNG_USE_RESULT __attribute__((__warn_unused_result__))
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| 370 | # endif
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| 371 | # ifndef PNG_NORETURN
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| 372 | # define PNG_NORETURN __attribute__((__noreturn__))
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| 373 | # endif
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| 374 | # if __GNUC__ >= 3
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| 375 | # ifndef PNG_ALLOCATED
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| 376 | # define PNG_ALLOCATED __attribute__((__malloc__))
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| 377 | # endif
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| 378 | # ifndef PNG_DEPRECATED
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| 379 | # define PNG_DEPRECATED __attribute__((__deprecated__))
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| 380 | # endif
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| 381 | # ifndef PNG_PRIVATE
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| 382 | # if 0 /* Doesn't work so we use deprecated instead*/
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| 383 | # define PNG_PRIVATE \
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| 384 | __attribute__((warning("This function is not exported by libpng.")))
|
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| 385 | # else
|
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| 386 | # define PNG_PRIVATE \
|
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| 387 | __attribute__((__deprecated__))
|
|---|
| 388 | # endif
|
|---|
| 389 | # endif
|
|---|
| 390 | # if ((__GNUC__ > 3) || !defined(__GNUC_MINOR__) || (__GNUC_MINOR__ >= 1))
|
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| 391 | # ifndef PNG_RESTRICT
|
|---|
| 392 | # define PNG_RESTRICT __restrict
|
|---|
| 393 | # endif
|
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| 394 | # endif /* __GNUC__.__GNUC_MINOR__ > 3.0 */
|
|---|
| 395 | # endif /* __GNUC__ >= 3 */
|
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| 396 |
|
|---|
| 397 | # elif defined(_MSC_VER) && (_MSC_VER >= 1300)
|
|---|
| 398 | # ifndef PNG_USE_RESULT
|
|---|
| 399 | # define PNG_USE_RESULT /* not supported */
|
|---|
| 400 | # endif
|
|---|
| 401 | # ifndef PNG_NORETURN
|
|---|
| 402 | # define PNG_NORETURN __declspec(noreturn)
|
|---|
| 403 | # endif
|
|---|
| 404 | # ifndef PNG_ALLOCATED
|
|---|
| 405 | # if (_MSC_VER >= 1400)
|
|---|
| 406 | # define PNG_ALLOCATED __declspec(restrict)
|
|---|
| 407 | # endif
|
|---|
| 408 | # endif
|
|---|
| 409 | # ifndef PNG_DEPRECATED
|
|---|
| 410 | # define PNG_DEPRECATED __declspec(deprecated)
|
|---|
| 411 | # endif
|
|---|
| 412 | # ifndef PNG_PRIVATE
|
|---|
| 413 | # define PNG_PRIVATE __declspec(deprecated)
|
|---|
| 414 | # endif
|
|---|
| 415 | # ifndef PNG_RESTRICT
|
|---|
| 416 | # if (_MSC_VER >= 1400)
|
|---|
| 417 | # define PNG_RESTRICT __restrict
|
|---|
| 418 | # endif
|
|---|
| 419 | # endif
|
|---|
| 420 |
|
|---|
| 421 | # elif defined(__WATCOMC__)
|
|---|
| 422 | # ifndef PNG_RESTRICT
|
|---|
| 423 | # define PNG_RESTRICT __restrict
|
|---|
| 424 | # endif
|
|---|
| 425 | # endif
|
|---|
| 426 | #endif /* PNG_PEDANTIC_WARNINGS */
|
|---|
| 427 |
|
|---|
| 428 | #ifndef PNG_DEPRECATED
|
|---|
| 429 | # define PNG_DEPRECATED /* Use of this function is deprecated */
|
|---|
| 430 | #endif
|
|---|
| 431 | #ifndef PNG_USE_RESULT
|
|---|
| 432 | # define PNG_USE_RESULT /* The result of this function must be checked */
|
|---|
| 433 | #endif
|
|---|
| 434 | #ifndef PNG_NORETURN
|
|---|
| 435 | # define PNG_NORETURN /* This function does not return */
|
|---|
| 436 | #endif
|
|---|
| 437 | #ifndef PNG_ALLOCATED
|
|---|
| 438 | # define PNG_ALLOCATED /* The result of the function is new memory */
|
|---|
| 439 | #endif
|
|---|
| 440 | #ifndef PNG_PRIVATE
|
|---|
| 441 | # define PNG_PRIVATE /* This is a private libpng function */
|
|---|
| 442 | #endif
|
|---|
| 443 | #ifndef PNG_RESTRICT
|
|---|
| 444 | # define PNG_RESTRICT /* The C99 "restrict" feature */
|
|---|
| 445 | #endif
|
|---|
| 446 |
|
|---|
| 447 | #ifndef PNG_FP_EXPORT /* A floating point API. */
|
|---|
| 448 | # ifdef PNG_FLOATING_POINT_SUPPORTED
|
|---|
| 449 | # define PNG_FP_EXPORT(ordinal, type, name, args)\
|
|---|
| 450 | PNG_EXPORT(ordinal, type, name, args);
|
|---|
| 451 | # else /* No floating point APIs */
|
|---|
| 452 | # define PNG_FP_EXPORT(ordinal, type, name, args)
|
|---|
| 453 | # endif
|
|---|
| 454 | #endif
|
|---|
| 455 | #ifndef PNG_FIXED_EXPORT /* A fixed point API. */
|
|---|
| 456 | # ifdef PNG_FIXED_POINT_SUPPORTED
|
|---|
| 457 | # define PNG_FIXED_EXPORT(ordinal, type, name, args)\
|
|---|
| 458 | PNG_EXPORT(ordinal, type, name, args);
|
|---|
| 459 | # else /* No fixed point APIs */
|
|---|
| 460 | # define PNG_FIXED_EXPORT(ordinal, type, name, args)
|
|---|
| 461 | # endif
|
|---|
| 462 | #endif
|
|---|
| 463 |
|
|---|
| 464 | #ifndef PNG_BUILDING_SYMBOL_TABLE
|
|---|
| 465 | /* Some typedefs to get us started. These should be safe on most of the common
|
|---|
| 466 | * platforms.
|
|---|
| 467 | *
|
|---|
| 468 | * png_uint_32 and png_int_32 may, currently, be larger than required to hold a
|
|---|
| 469 | * 32-bit value however this is not normally advisable.
|
|---|
| 470 | *
|
|---|
| 471 | * png_uint_16 and png_int_16 should always be two bytes in size - this is
|
|---|
| 472 | * verified at library build time.
|
|---|
| 473 | *
|
|---|
| 474 | * png_byte must always be one byte in size.
|
|---|
| 475 | *
|
|---|
| 476 | * The checks below use constants from limits.h, as defined by the ISOC90
|
|---|
| 477 | * standard.
|
|---|
| 478 | */
|
|---|
| 479 | #if CHAR_BIT == 8 && UCHAR_MAX == 255
|
|---|
| 480 | typedef unsigned char png_byte;
|
|---|
| 481 | #else
|
|---|
| 482 | # error "libpng requires 8-bit bytes"
|
|---|
| 483 | #endif
|
|---|
| 484 |
|
|---|
| 485 | #if INT_MIN == -32768 && INT_MAX == 32767
|
|---|
| 486 | typedef int png_int_16;
|
|---|
| 487 | #elif SHRT_MIN == -32768 && SHRT_MAX == 32767
|
|---|
| 488 | typedef short png_int_16;
|
|---|
| 489 | #else
|
|---|
| 490 | # error "libpng requires a signed 16-bit type"
|
|---|
| 491 | #endif
|
|---|
| 492 |
|
|---|
| 493 | #if UINT_MAX == 65535
|
|---|
| 494 | typedef unsigned int png_uint_16;
|
|---|
| 495 | #elif USHRT_MAX == 65535
|
|---|
| 496 | typedef unsigned short png_uint_16;
|
|---|
| 497 | #else
|
|---|
| 498 | # error "libpng requires an unsigned 16-bit type"
|
|---|
| 499 | #endif
|
|---|
| 500 |
|
|---|
| 501 | #if INT_MIN < -2147483646 && INT_MAX > 2147483646
|
|---|
| 502 | typedef int png_int_32;
|
|---|
| 503 | #elif LONG_MIN < -2147483646 && LONG_MAX > 2147483646
|
|---|
| 504 | typedef long int png_int_32;
|
|---|
| 505 | #else
|
|---|
| 506 | # error "libpng requires a signed 32-bit (or more) type"
|
|---|
| 507 | #endif
|
|---|
| 508 |
|
|---|
| 509 | #if UINT_MAX > 4294967294U
|
|---|
| 510 | typedef unsigned int png_uint_32;
|
|---|
| 511 | #elif ULONG_MAX > 4294967294U
|
|---|
| 512 | typedef unsigned long int png_uint_32;
|
|---|
| 513 | #else
|
|---|
| 514 | # error "libpng requires an unsigned 32-bit (or more) type"
|
|---|
| 515 | #endif
|
|---|
| 516 |
|
|---|
| 517 | /* Prior to 1.6.0, it was possible to disable the use of size_t and ptrdiff_t.
|
|---|
| 518 | * From 1.6.0 onwards, an ISO C90 compiler, as well as a standard-compliant
|
|---|
| 519 | * behavior of sizeof and ptrdiff_t are required.
|
|---|
| 520 | * The legacy typedefs are provided here for backwards compatibility.
|
|---|
| 521 | */
|
|---|
| 522 | typedef size_t png_size_t;
|
|---|
| 523 | typedef ptrdiff_t png_ptrdiff_t;
|
|---|
| 524 |
|
|---|
| 525 | /* libpng needs to know the maximum value of 'size_t' and this controls the
|
|---|
| 526 | * definition of png_alloc_size_t, below. This maximum value of size_t limits
|
|---|
| 527 | * but does not control the maximum allocations the library makes - there is
|
|---|
| 528 | * direct application control of this through png_set_user_limits().
|
|---|
| 529 | */
|
|---|
| 530 | #ifndef PNG_SMALL_SIZE_T
|
|---|
| 531 | /* Compiler specific tests for systems where size_t is known to be less than
|
|---|
| 532 | * 32 bits (some of these systems may no longer work because of the lack of
|
|---|
| 533 | * 'far' support; see above.)
|
|---|
| 534 | */
|
|---|
| 535 | # if (defined(__TURBOC__) && !defined(__FLAT__)) ||\
|
|---|
| 536 | (defined(_MSC_VER) && defined(MAXSEG_64K))
|
|---|
| 537 | # define PNG_SMALL_SIZE_T
|
|---|
| 538 | # endif
|
|---|
| 539 | #endif
|
|---|
| 540 |
|
|---|
| 541 | /* png_alloc_size_t is guaranteed to be no smaller than size_t, and no smaller
|
|---|
| 542 | * than png_uint_32. Casts from size_t or png_uint_32 to png_alloc_size_t are
|
|---|
| 543 | * not necessary; in fact, it is recommended not to use them at all, so that
|
|---|
| 544 | * the compiler can complain when something turns out to be problematic.
|
|---|
| 545 | *
|
|---|
| 546 | * Casts in the other direction (from png_alloc_size_t to size_t or
|
|---|
| 547 | * png_uint_32) should be explicitly applied; however, we do not expect to
|
|---|
| 548 | * encounter practical situations that require such conversions.
|
|---|
| 549 | *
|
|---|
| 550 | * PNG_SMALL_SIZE_T must be defined if the maximum value of size_t is less than
|
|---|
| 551 | * 4294967295 - i.e. less than the maximum value of png_uint_32.
|
|---|
| 552 | */
|
|---|
| 553 | #ifdef PNG_SMALL_SIZE_T
|
|---|
| 554 | typedef png_uint_32 png_alloc_size_t;
|
|---|
| 555 | #else
|
|---|
| 556 | typedef size_t png_alloc_size_t;
|
|---|
| 557 | #endif
|
|---|
| 558 |
|
|---|
| 559 | /* Prior to 1.6.0 libpng offered limited support for Microsoft C compiler
|
|---|
| 560 | * implementations of Intel CPU specific support of user-mode segmented address
|
|---|
| 561 | * spaces, where 16-bit pointers address more than 65536 bytes of memory using
|
|---|
| 562 | * separate 'segment' registers. The implementation requires two different
|
|---|
| 563 | * types of pointer (only one of which includes the segment value.)
|
|---|
| 564 | *
|
|---|
| 565 | * If required this support is available in version 1.2 of libpng and may be
|
|---|
| 566 | * available in versions through 1.5, although the correctness of the code has
|
|---|
| 567 | * not been verified recently.
|
|---|
| 568 | */
|
|---|
| 569 |
|
|---|
| 570 | /* Typedef for floating-point numbers that are converted to fixed-point with a
|
|---|
| 571 | * multiple of 100,000, e.g., gamma
|
|---|
| 572 | */
|
|---|
| 573 | typedef png_int_32 png_fixed_point;
|
|---|
| 574 |
|
|---|
| 575 | /* Add typedefs for pointers */
|
|---|
| 576 | typedef void * png_voidp;
|
|---|
| 577 | typedef const void * png_const_voidp;
|
|---|
| 578 | typedef png_byte * png_bytep;
|
|---|
| 579 | typedef const png_byte * png_const_bytep;
|
|---|
| 580 | typedef png_uint_32 * png_uint_32p;
|
|---|
| 581 | typedef const png_uint_32 * png_const_uint_32p;
|
|---|
| 582 | typedef png_int_32 * png_int_32p;
|
|---|
| 583 | typedef const png_int_32 * png_const_int_32p;
|
|---|
| 584 | typedef png_uint_16 * png_uint_16p;
|
|---|
| 585 | typedef const png_uint_16 * png_const_uint_16p;
|
|---|
| 586 | typedef png_int_16 * png_int_16p;
|
|---|
| 587 | typedef const png_int_16 * png_const_int_16p;
|
|---|
| 588 | typedef char * png_charp;
|
|---|
| 589 | typedef const char * png_const_charp;
|
|---|
| 590 | typedef png_fixed_point * png_fixed_point_p;
|
|---|
| 591 | typedef const png_fixed_point * png_const_fixed_point_p;
|
|---|
| 592 | typedef size_t * png_size_tp;
|
|---|
| 593 | typedef const size_t * png_const_size_tp;
|
|---|
| 594 |
|
|---|
| 595 | #ifdef PNG_STDIO_SUPPORTED
|
|---|
| 596 | typedef FILE * png_FILE_p;
|
|---|
| 597 | #endif
|
|---|
| 598 |
|
|---|
| 599 | #ifdef PNG_FLOATING_POINT_SUPPORTED
|
|---|
| 600 | typedef double * png_doublep;
|
|---|
| 601 | typedef const double * png_const_doublep;
|
|---|
| 602 | #endif
|
|---|
| 603 |
|
|---|
| 604 | /* Pointers to pointers; i.e. arrays */
|
|---|
| 605 | typedef png_byte * * png_bytepp;
|
|---|
| 606 | typedef png_uint_32 * * png_uint_32pp;
|
|---|
| 607 | typedef png_int_32 * * png_int_32pp;
|
|---|
| 608 | typedef png_uint_16 * * png_uint_16pp;
|
|---|
| 609 | typedef png_int_16 * * png_int_16pp;
|
|---|
| 610 | typedef const char * * png_const_charpp;
|
|---|
| 611 | typedef char * * png_charpp;
|
|---|
| 612 | typedef png_fixed_point * * png_fixed_point_pp;
|
|---|
| 613 | #ifdef PNG_FLOATING_POINT_SUPPORTED
|
|---|
| 614 | typedef double * * png_doublepp;
|
|---|
| 615 | #endif
|
|---|
| 616 |
|
|---|
| 617 | /* Pointers to pointers to pointers; i.e., pointer to array */
|
|---|
| 618 | typedef char * * * png_charppp;
|
|---|
| 619 |
|
|---|
| 620 | #endif /* PNG_BUILDING_SYMBOL_TABLE */
|
|---|
| 621 |
|
|---|
| 622 | #endif /* PNGCONF_H */
|
|---|
