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2297
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1
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2 /* pngconf.h - machine configurable file for libpng
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3 *
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4 * libpng version 1.6.10 - March 6, 2014
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5 *
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6 * Copyright (c) 1998-2013 Glenn Randers-Pehrson
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7 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
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8 * (Version 0.88 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 */
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15
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16 /* Any machine specific code is near the front of this file, so if you
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17 * are configuring libpng for a machine, you may want to read the section
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18 * starting here down to where it starts to typedef png_color, png_text,
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19 * and png_info.
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20 */
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21
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22 #ifndef PNGCONF_H
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23 #define PNGCONF_H
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24
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25 /* To do: Do all of this in scripts/pnglibconf.dfa */
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26 #ifdef PNG_SAFE_LIMITS_SUPPORTED
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27 # ifdef PNG_USER_WIDTH_MAX
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28 # undef PNG_USER_WIDTH_MAX
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29 # define PNG_USER_WIDTH_MAX 1000000L
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30 # endif
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31 # ifdef PNG_USER_HEIGHT_MAX
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32 # undef PNG_USER_HEIGHT_MAX
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33 # define PNG_USER_HEIGHT_MAX 1000000L
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34 # endif
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35 # ifdef PNG_USER_CHUNK_MALLOC_MAX
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36 # undef PNG_USER_CHUNK_MALLOC_MAX
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37 # define PNG_USER_CHUNK_MALLOC_MAX 4000000L
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38 # endif
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39 # ifdef PNG_USER_CHUNK_CACHE_MAX
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40 # undef PNG_USER_CHUNK_CACHE_MAX
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41 # define PNG_USER_CHUNK_CACHE_MAX 128
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42 # endif
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43 #endif
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44
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45 #ifndef PNG_BUILDING_SYMBOL_TABLE /* else includes may cause problems */
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46
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47 /* From libpng 1.6.0 libpng requires an ANSI X3.159-1989 ("ISOC90") compliant C
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48 * compiler for correct compilation. The following header files are required by
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49 * the standard. If your compiler doesn't provide these header files, or they
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50 * do not match the standard, you will need to provide/improve them.
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51 */
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52 #include <limits.h>
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53 #include <stddef.h>
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54
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55 /* Library header files. These header files are all defined by ISOC90; libpng
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56 * expects conformant implementations, however, an ISOC90 conformant system need
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57 * not provide these header files if the functionality cannot be implemented.
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58 * In this case it will be necessary to disable the relevant parts of libpng in
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59 * the build of pnglibconf.h.
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60 *
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61 * Prior to 1.6.0 string.h was included here; the API changes in 1.6.0 to not
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62 * include this unnecessary header file.
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63 */
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64
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65 #ifdef PNG_STDIO_SUPPORTED
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66 /* Required for the definition of FILE: */
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67 # include <stdio.h>
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68 #endif
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69
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70 #ifdef PNG_SETJMP_SUPPORTED
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71 /* Required for the definition of jmp_buf and the declaration of longjmp: */
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72 # include <setjmp.h>
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73 #endif
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74
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75 #ifdef PNG_CONVERT_tIME_SUPPORTED
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76 /* Required for struct tm: */
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77 # include <time.h>
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78 #endif
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79
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80 #endif /* PNG_BUILDING_SYMBOL_TABLE */
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81
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82 /* Prior to 1.6.0 it was possible to turn off 'const' in declarations using
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83 * PNG_NO_CONST; this is no longer supported except for data declarations which
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84 * apparently still cause problems in 2011 on some compilers.
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85 */
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86 #define PNG_CONST const /* backward compatibility only */
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87
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88 /* This controls optimization of the reading of 16 and 32 bit values
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89 * from PNG files. It can be set on a per-app-file basis - it
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90 * just changes whether a macro is used when the function is called.
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91 * The library builder sets the default; if read functions are not
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92 * built into the library the macro implementation is forced on.
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93 */
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94 #ifndef PNG_READ_INT_FUNCTIONS_SUPPORTED
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95 # define PNG_USE_READ_MACROS
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96 #endif
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97 #if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS)
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98 # if PNG_DEFAULT_READ_MACROS
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99 # define PNG_USE_READ_MACROS
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100 # endif
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101 #endif
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102
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103 /* COMPILER SPECIFIC OPTIONS.
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104 *
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105 * These options are provided so that a variety of difficult compilers
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106 * can be used. Some are fixed at build time (e.g. PNG_API_RULE
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107 * below) but still have compiler specific implementations, others
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108 * may be changed on a per-file basis when compiling against libpng.
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109 */
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110
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111 /* The PNGARG macro was used in versions of libpng prior to 1.6.0 to protect
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112 * against legacy (pre ISOC90) compilers that did not understand function
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113 * prototypes. It is not required for modern C compilers.
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114 */
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115 #ifndef PNGARG
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116 # define PNGARG(arglist) arglist
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117 #endif
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118
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119 /* Function calling conventions.
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120 * =============================
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121 * Normally it is not necessary to specify to the compiler how to call
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122 * a function - it just does it - however on x86 systems derived from
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123 * Microsoft and Borland C compilers ('IBM PC', 'DOS', 'Windows' systems
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124 * and some others) there are multiple ways to call a function and the
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125 * default can be changed on the compiler command line. For this reason
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126 * libpng specifies the calling convention of every exported function and
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127 * every function called via a user supplied function pointer. This is
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128 * done in this file by defining the following macros:
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129 *
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130 * PNGAPI Calling convention for exported functions.
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131 * PNGCBAPI Calling convention for user provided (callback) functions.
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132 * PNGCAPI Calling convention used by the ANSI-C library (required
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133 * for longjmp callbacks and sometimes used internally to
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134 * specify the calling convention for zlib).
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135 *
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136 * These macros should never be overridden. If it is necessary to
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137 * change calling convention in a private build this can be done
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138 * by setting PNG_API_RULE (which defaults to 0) to one of the values
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139 * below to select the correct 'API' variants.
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140 *
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141 * PNG_API_RULE=0 Use PNGCAPI - the 'C' calling convention - throughout.
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142 * This is correct in every known environment.
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143 * PNG_API_RULE=1 Use the operating system convention for PNGAPI and
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144 * the 'C' calling convention (from PNGCAPI) for
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145 * callbacks (PNGCBAPI). This is no longer required
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146 * in any known environment - if it has to be used
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147 * please post an explanation of the problem to the
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148 * libpng mailing list.
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149 *
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150 * These cases only differ if the operating system does not use the C
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151 * calling convention, at present this just means the above cases
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152 * (x86 DOS/Windows sytems) and, even then, this does not apply to
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153 * Cygwin running on those systems.
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154 *
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155 * Note that the value must be defined in pnglibconf.h so that what
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156 * the application uses to call the library matches the conventions
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157 * set when building the library.
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158 */
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159
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160 /* Symbol export
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161 * =============
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162 * When building a shared library it is almost always necessary to tell
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163 * the compiler which symbols to export. The png.h macro 'PNG_EXPORT'
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164 * is used to mark the symbols. On some systems these symbols can be
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165 * extracted at link time and need no special processing by the compiler,
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166 * on other systems the symbols are flagged by the compiler and just
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167 * the declaration requires a special tag applied (unfortunately) in a
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168 * compiler dependent way. Some systems can do either.
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169 *
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170 * A small number of older systems also require a symbol from a DLL to
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171 * be flagged to the program that calls it. This is a problem because
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172 * we do not know in the header file included by application code that
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173 * the symbol will come from a shared library, as opposed to a statically
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174 * linked one. For this reason the application must tell us by setting
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175 * the magic flag PNG_USE_DLL to turn on the special processing before
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176 * it includes png.h.
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177 *
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178 * Four additional macros are used to make this happen:
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179 *
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180 * PNG_IMPEXP The magic (if any) to cause a symbol to be exported from
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181 * the build or imported if PNG_USE_DLL is set - compiler
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182 * and system specific.
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183 *
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184 * PNG_EXPORT_TYPE(type) A macro that pre or appends PNG_IMPEXP to
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185 * 'type', compiler specific.
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186 *
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187 * PNG_DLL_EXPORT Set to the magic to use during a libpng build to
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188 * make a symbol exported from the DLL. Not used in the
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189 * public header files; see pngpriv.h for how it is used
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190 * in the libpng build.
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191 *
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192 * PNG_DLL_IMPORT Set to the magic to force the libpng symbols to come
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193 * from a DLL - used to define PNG_IMPEXP when
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194 * PNG_USE_DLL is set.
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195 */
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196
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197 /* System specific discovery.
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198 * ==========================
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199 * This code is used at build time to find PNG_IMPEXP, the API settings
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200 * and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL
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201 * import processing is possible. On Windows systems it also sets
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202 * compiler-specific macros to the values required to change the calling
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203 * conventions of the various functions.
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204 */
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205 #if defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\
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206 defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
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207 /* Windows system (DOS doesn't support DLLs). Includes builds under Cygwin or
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208 * MinGW on any architecture currently supported by Windows. Also includes
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209 * Watcom builds but these need special treatment because they are not
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210 * compatible with GCC or Visual C because of different calling conventions.
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211 */
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212 # if PNG_API_RULE == 2
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213 /* If this line results in an error, either because __watcall is not
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214 * understood or because of a redefine just below you cannot use *this*
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215 * build of the library with the compiler you are using. *This* build was
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216 * build using Watcom and applications must also be built using Watcom!
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217 */
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218 # define PNGCAPI __watcall
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219 # endif
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220
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221 # if defined(__GNUC__) || (defined(_MSC_VER) && (_MSC_VER >= 800))
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222 # define PNGCAPI __cdecl
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223 # if PNG_API_RULE == 1
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224 /* If this line results in an error __stdcall is not understood and
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225 * PNG_API_RULE should not have been set to '1'.
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226 */
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227 # define PNGAPI __stdcall
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228 # endif
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229 # else
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230 /* An older compiler, or one not detected (erroneously) above,
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231 * if necessary override on the command line to get the correct
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232 * variants for the compiler.
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233 */
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234 # ifndef PNGCAPI
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235 # define PNGCAPI _cdecl
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236 # endif
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237 # if PNG_API_RULE == 1 && !defined(PNGAPI)
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238 # define PNGAPI _stdcall
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239 # endif
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240 # endif /* compiler/api */
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241
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242 /* NOTE: PNGCBAPI always defaults to PNGCAPI. */
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243
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244 # if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD)
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245 # error "PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed"
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246 # endif
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247
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248 # if (defined(_MSC_VER) && _MSC_VER < 800) ||\
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249 (defined(__BORLANDC__) && __BORLANDC__ < 0x500)
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250 /* older Borland and MSC
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251 * compilers used '__export' and required this to be after
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252 * the type.
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253 */
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254 # ifndef PNG_EXPORT_TYPE
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255 # define PNG_EXPORT_TYPE(type) type PNG_IMPEXP
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256 # endif
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257 # define PNG_DLL_EXPORT __export
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258 # else /* newer compiler */
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259 # define PNG_DLL_EXPORT __declspec(dllexport)
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260 # ifndef PNG_DLL_IMPORT
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261 # define PNG_DLL_IMPORT __declspec(dllimport)
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262 # endif
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263 # endif /* compiler */
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264
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265 #else /* !Windows */
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266 # if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
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267 # define PNGAPI _System
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268 # else /* !Windows/x86 && !OS/2 */
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269 /* Use the defaults, or define PNG*API on the command line (but
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270 * this will have to be done for every compile!)
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271 */
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272 # endif /* other system, !OS/2 */
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273 #endif /* !Windows/x86 */
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274
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275 /* Now do all the defaulting . */
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276 #ifndef PNGCAPI
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277 # define PNGCAPI
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278 #endif
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279 #ifndef PNGCBAPI
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280 # define PNGCBAPI PNGCAPI
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281 #endif
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282 #ifndef PNGAPI
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283 # define PNGAPI PNGCAPI
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284 #endif
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285
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286 /* PNG_IMPEXP may be set on the compilation system command line or (if not set)
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287 * then in an internal header file when building the library, otherwise (when
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288 * using the library) it is set here.
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289 */
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290 #ifndef PNG_IMPEXP
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291 # if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT)
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292 /* This forces use of a DLL, disallowing static linking */
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293 # define PNG_IMPEXP PNG_DLL_IMPORT
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294 # endif
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295
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296 # ifndef PNG_IMPEXP
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297 # define PNG_IMPEXP
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298 # endif
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299 #endif
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300
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301 /* In 1.5.2 the definition of PNG_FUNCTION has been changed to always treat
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302 * 'attributes' as a storage class - the attributes go at the start of the
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303 * function definition, and attributes are always appended regardless of the
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304 * compiler. This considerably simplifies these macros but may cause problems
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305 * if any compilers both need function attributes and fail to handle them as
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306 * a storage class (this is unlikely.)
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307 */
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308 #ifndef PNG_FUNCTION
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309 # define PNG_FUNCTION(type, name, args, attributes) attributes type name args
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310 #endif
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311
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312 #ifndef PNG_EXPORT_TYPE
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313 # define PNG_EXPORT_TYPE(type) PNG_IMPEXP type
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314 #endif
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315
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316 /* The ordinal value is only relevant when preprocessing png.h for symbol
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317 * table entries, so we discard it here. See the .dfn files in the
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318 * scripts directory.
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319 */
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320 #ifndef PNG_EXPORTA
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321
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322 # define PNG_EXPORTA(ordinal, type, name, args, attributes)\
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323 PNG_FUNCTION(PNG_EXPORT_TYPE(type),(PNGAPI name),PNGARG(args), \
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324 extern attributes)
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325 #endif
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326
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327 /* ANSI-C (C90) does not permit a macro to be invoked with an empty argument,
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328 * so make something non-empty to satisfy the requirement:
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329 */
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330 #define PNG_EMPTY /*empty list*/
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331
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332 #define PNG_EXPORT(ordinal, type, name, args)\
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333 PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY)
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334
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335 /* Use PNG_REMOVED to comment out a removed interface. */
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336 #ifndef PNG_REMOVED
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337 # define PNG_REMOVED(ordinal, type, name, args, attributes)
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338 #endif
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339
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340 #ifndef PNG_CALLBACK
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341 # define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) PNGARG(args)
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342 #endif
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343
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344 /* Support for compiler specific function attributes. These are used
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345 * so that where compiler support is available incorrect use of API
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346 * functions in png.h will generate compiler warnings.
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347 *
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348 * Added at libpng-1.2.41.
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349 */
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350
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351 #ifndef PNG_NO_PEDANTIC_WARNINGS
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352 # ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED
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353 # define PNG_PEDANTIC_WARNINGS_SUPPORTED
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354 # endif
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355 #endif
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356
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357 #ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED
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358 /* Support for compiler specific function attributes. These are used
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359 * so that where compiler support is available, incorrect use of API
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360 * functions in png.h will generate compiler warnings. Added at libpng
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361 * version 1.2.41. Disabling these removes the warnings but may also produce
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362 * less efficient code.
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363 */
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364 # if defined(__clang__)
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365 /* Clang defines both __clang__ and __GNUC__. Check __clang__ first. */
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366 # if !defined(PNG_USE_RESULT) && __has_attribute(__warn_unused_result__)
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367 # define PNG_USE_RESULT __attribute__((__warn_unused_result__))
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368 # endif
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369 # if !defined(PNG_NORETURN) && __has_attribute(__noreturn__)
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370 # define PNG_NORETURN __attribute__((__noreturn__))
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371 # endif
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372 # if !defined(PNG_ALLOCATED) && __has_attribute(__malloc__)
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373 # define PNG_ALLOCATED __attribute__((__malloc__))
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374 # endif
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375 # if !defined(PNG_DEPRECATED) && __has_attribute(__deprecated__)
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376 # define PNG_DEPRECATED __attribute__((__deprecated__))
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377 # endif
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378 # if !defined(PNG_PRIVATE)
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379 # ifdef __has_extension
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380 # if __has_extension(attribute_unavailable_with_message)
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381 # define PNG_PRIVATE __attribute__((__unavailable__(\
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382 "This function is not exported by libpng.")))
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383 # endif
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384 # endif
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385 # endif
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386 # ifndef PNG_RESTRICT
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387 # define PNG_RESTRICT __restrict
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|
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388 # endif
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389
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|
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390 # elif defined(__GNUC__)
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391 # ifndef PNG_USE_RESULT
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|
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392 # define PNG_USE_RESULT __attribute__((__warn_unused_result__))
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|
393 # endif
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394 # ifndef PNG_NORETURN
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395 # define PNG_NORETURN __attribute__((__noreturn__))
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|
|
396 # endif
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|
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397 # if __GNUC__ >= 3
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|
398 # ifndef PNG_ALLOCATED
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399 # define PNG_ALLOCATED __attribute__((__malloc__))
|
|
|
400 # endif
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|
401 # ifndef PNG_DEPRECATED
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|
402 # define PNG_DEPRECATED __attribute__((__deprecated__))
|
|
|
403 # endif
|
|
|
404 # ifndef PNG_PRIVATE
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|
|
405 # if 0 /* Doesn't work so we use deprecated instead*/
|
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|
406 # define PNG_PRIVATE \
|
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407 __attribute__((warning("This function is not exported by libpng.")))
|
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|
408 # else
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|
|
409 # define PNG_PRIVATE \
|
|
|
410 __attribute__((__deprecated__))
|
|
|
411 # endif
|
|
|
412 # endif
|
|
|
413 # if ((__GNUC__ > 3) || !defined(__GNUC_MINOR__) || (__GNUC_MINOR__ >= 1))
|
|
|
414 # ifndef PNG_RESTRICT
|
|
|
415 # define PNG_RESTRICT __restrict
|
|
|
416 # endif
|
|
|
417 # endif /* __GNUC__.__GNUC_MINOR__ > 3.0 */
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|
|
418 # endif /* __GNUC__ >= 3 */
|
|
|
419
|
|
|
420 # elif defined(_MSC_VER) && (_MSC_VER >= 1300)
|
|
|
421 # ifndef PNG_USE_RESULT
|
|
|
422 # define PNG_USE_RESULT /* not supported */
|
|
|
423 # endif
|
|
|
424 # ifndef PNG_NORETURN
|
|
|
425 # define PNG_NORETURN __declspec(noreturn)
|
|
|
426 # endif
|
|
|
427 # ifndef PNG_ALLOCATED
|
|
|
428 # if (_MSC_VER >= 1400)
|
|
|
429 # define PNG_ALLOCATED __declspec(restrict)
|
|
|
430 # endif
|
|
|
431 # endif
|
|
|
432 # ifndef PNG_DEPRECATED
|
|
|
433 # define PNG_DEPRECATED __declspec(deprecated)
|
|
|
434 # endif
|
|
|
435 # ifndef PNG_PRIVATE
|
|
|
436 # define PNG_PRIVATE __declspec(deprecated)
|
|
|
437 # endif
|
|
|
438 # ifndef PNG_RESTRICT
|
|
|
439 # if (_MSC_VER >= 1400)
|
|
|
440 # define PNG_RESTRICT __restrict
|
|
|
441 # endif
|
|
|
442 # endif
|
|
|
443
|
|
|
444 # elif defined(__WATCOMC__)
|
|
|
445 # ifndef PNG_RESTRICT
|
|
|
446 # define PNG_RESTRICT __restrict
|
|
|
447 # endif
|
|
|
448 # endif
|
|
|
449 #endif /* PNG_PEDANTIC_WARNINGS */
|
|
|
450
|
|
|
451 #ifndef PNG_DEPRECATED
|
|
|
452 # define PNG_DEPRECATED /* Use of this function is deprecated */
|
|
|
453 #endif
|
|
|
454 #ifndef PNG_USE_RESULT
|
|
|
455 # define PNG_USE_RESULT /* The result of this function must be checked */
|
|
|
456 #endif
|
|
|
457 #ifndef PNG_NORETURN
|
|
|
458 # define PNG_NORETURN /* This function does not return */
|
|
|
459 #endif
|
|
|
460 #ifndef PNG_ALLOCATED
|
|
|
461 # define PNG_ALLOCATED /* The result of the function is new memory */
|
|
|
462 #endif
|
|
|
463 #ifndef PNG_PRIVATE
|
|
|
464 # define PNG_PRIVATE /* This is a private libpng function */
|
|
|
465 #endif
|
|
|
466 #ifndef PNG_RESTRICT
|
|
|
467 # define PNG_RESTRICT /* The C99 "restrict" feature */
|
|
|
468 #endif
|
|
|
469
|
|
|
470 #ifndef PNG_FP_EXPORT /* A floating point API. */
|
|
|
471 # ifdef PNG_FLOATING_POINT_SUPPORTED
|
|
|
472 # define PNG_FP_EXPORT(ordinal, type, name, args)\
|
|
|
473 PNG_EXPORT(ordinal, type, name, args);
|
|
|
474 # else /* No floating point APIs */
|
|
|
475 # define PNG_FP_EXPORT(ordinal, type, name, args)
|
|
|
476 # endif
|
|
|
477 #endif
|
|
|
478 #ifndef PNG_FIXED_EXPORT /* A fixed point API. */
|
|
|
479 # ifdef PNG_FIXED_POINT_SUPPORTED
|
|
|
480 # define PNG_FIXED_EXPORT(ordinal, type, name, args)\
|
|
|
481 PNG_EXPORT(ordinal, type, name, args);
|
|
|
482 # else /* No fixed point APIs */
|
|
|
483 # define PNG_FIXED_EXPORT(ordinal, type, name, args)
|
|
|
484 # endif
|
|
|
485 #endif
|
|
|
486
|
|
|
487 #ifndef PNG_BUILDING_SYMBOL_TABLE
|
|
|
488 /* Some typedefs to get us started. These should be safe on most of the common
|
|
|
489 * platforms.
|
|
|
490 *
|
|
|
491 * png_uint_32 and png_int_32 may, currently, be larger than required to hold a
|
|
|
492 * 32-bit value however this is not normally advisable.
|
|
|
493 *
|
|
|
494 * png_uint_16 and png_int_16 should always be two bytes in size - this is
|
|
|
495 * verified at library build time.
|
|
|
496 *
|
|
|
497 * png_byte must always be one byte in size.
|
|
|
498 *
|
|
|
499 * The checks below use constants from limits.h, as defined by the ISOC90
|
|
|
500 * standard.
|
|
|
501 */
|
|
|
502 #if CHAR_BIT == 8 && UCHAR_MAX == 255
|
|
|
503 typedef unsigned char png_byte;
|
|
|
504 #else
|
|
|
505 # error "libpng requires 8 bit bytes"
|
|
|
506 #endif
|
|
|
507
|
|
|
508 #if INT_MIN == -32768 && INT_MAX == 32767
|
|
|
509 typedef int png_int_16;
|
|
|
510 #elif SHRT_MIN == -32768 && SHRT_MAX == 32767
|
|
|
511 typedef short png_int_16;
|
|
|
512 #else
|
|
|
513 # error "libpng requires a signed 16 bit type"
|
|
|
514 #endif
|
|
|
515
|
|
|
516 #if UINT_MAX == 65535
|
|
|
517 typedef unsigned int png_uint_16;
|
|
|
518 #elif USHRT_MAX == 65535
|
|
|
519 typedef unsigned short png_uint_16;
|
|
|
520 #else
|
|
|
521 # error "libpng requires an unsigned 16 bit type"
|
|
|
522 #endif
|
|
|
523
|
|
|
524 #if INT_MIN < -2147483646 && INT_MAX > 2147483646
|
|
|
525 typedef int png_int_32;
|
|
|
526 #elif LONG_MIN < -2147483646 && LONG_MAX > 2147483646
|
|
|
527 typedef long int png_int_32;
|
|
|
528 #else
|
|
|
529 # error "libpng requires a signed 32 bit (or more) type"
|
|
|
530 #endif
|
|
|
531
|
|
|
532 #if UINT_MAX > 4294967294
|
|
|
533 typedef unsigned int png_uint_32;
|
|
|
534 #elif ULONG_MAX > 4294967294
|
|
|
535 typedef unsigned long int png_uint_32;
|
|
|
536 #else
|
|
|
537 # error "libpng requires an unsigned 32 bit (or more) type"
|
|
|
538 #endif
|
|
|
539
|
|
|
540 /* Prior to 1.6.0 it was possible to disable the use of size_t, 1.6.0, however,
|
|
|
541 * requires an ISOC90 compiler and relies on consistent behavior of sizeof.
|
|
|
542 */
|
|
|
543 typedef size_t png_size_t;
|
|
|
544 typedef ptrdiff_t png_ptrdiff_t;
|
|
|
545
|
|
|
546 /* libpng needs to know the maximum value of 'size_t' and this controls the
|
|
|
547 * definition of png_alloc_size_t, below. This maximum value of size_t limits
|
|
|
548 * but does not control the maximum allocations the library makes - there is
|
|
|
549 * direct application control of this through png_set_user_limits().
|
|
|
550 */
|
|
|
551 #ifndef PNG_SMALL_SIZE_T
|
|
|
552 /* Compiler specific tests for systems where size_t is known to be less than
|
|
|
553 * 32 bits (some of these systems may no longer work because of the lack of
|
|
|
554 * 'far' support; see above.)
|
|
|
555 */
|
|
|
556 # if (defined(__TURBOC__) && !defined(__FLAT__)) ||\
|
|
|
557 (defined(_MSC_VER) && defined(MAXSEG_64K))
|
|
|
558 # define PNG_SMALL_SIZE_T
|
|
|
559 # endif
|
|
|
560 #endif
|
|
|
561
|
|
|
562 /* png_alloc_size_t is guaranteed to be no smaller than png_size_t, and no
|
|
|
563 * smaller than png_uint_32. Casts from png_size_t or png_uint_32 to
|
|
|
564 * png_alloc_size_t are not necessary; in fact, it is recommended not to use
|
|
|
565 * them at all so that the compiler can complain when something turns out to be
|
|
|
566 * problematic.
|
|
|
567 *
|
|
|
568 * Casts in the other direction (from png_alloc_size_t to png_size_t or
|
|
|
569 * png_uint_32) should be explicitly applied; however, we do not expect to
|
|
|
570 * encounter practical situations that require such conversions.
|
|
|
571 *
|
|
|
572 * PNG_SMALL_SIZE_T must be defined if the maximum value of size_t is less than
|
|
|
573 * 4294967295 - i.e. less than the maximum value of png_uint_32.
|
|
|
574 */
|
|
|
575 #ifdef PNG_SMALL_SIZE_T
|
|
|
576 typedef png_uint_32 png_alloc_size_t;
|
|
|
577 #else
|
|
|
578 typedef png_size_t png_alloc_size_t;
|
|
|
579 #endif
|
|
|
580
|
|
|
581 /* Prior to 1.6.0 libpng offered limited support for Microsoft C compiler
|
|
|
582 * implementations of Intel CPU specific support of user-mode segmented address
|
|
|
583 * spaces, where 16-bit pointers address more than 65536 bytes of memory using
|
|
|
584 * separate 'segment' registers. The implementation requires two different
|
|
|
585 * types of pointer (only one of which includes the segment value.)
|
|
|
586 *
|
|
|
587 * If required this support is available in version 1.2 of libpng and may be
|
|
|
588 * available in versions through 1.5, although the correctness of the code has
|
|
|
589 * not been verified recently.
|
|
|
590 */
|
|
|
591
|
|
|
592 /* Typedef for floating-point numbers that are converted to fixed-point with a
|
|
|
593 * multiple of 100,000, e.g., gamma
|
|
|
594 */
|
|
|
595 typedef png_int_32 png_fixed_point;
|
|
|
596
|
|
|
597 /* Add typedefs for pointers */
|
|
|
598 typedef void * png_voidp;
|
|
|
599 typedef const void * png_const_voidp;
|
|
|
600 typedef png_byte * png_bytep;
|
|
|
601 typedef const png_byte * png_const_bytep;
|
|
|
602 typedef png_uint_32 * png_uint_32p;
|
|
|
603 typedef const png_uint_32 * png_const_uint_32p;
|
|
|
604 typedef png_int_32 * png_int_32p;
|
|
|
605 typedef const png_int_32 * png_const_int_32p;
|
|
|
606 typedef png_uint_16 * png_uint_16p;
|
|
|
607 typedef const png_uint_16 * png_const_uint_16p;
|
|
|
608 typedef png_int_16 * png_int_16p;
|
|
|
609 typedef const png_int_16 * png_const_int_16p;
|
|
|
610 typedef char * png_charp;
|
|
|
611 typedef const char * png_const_charp;
|
|
|
612 typedef png_fixed_point * png_fixed_point_p;
|
|
|
613 typedef const png_fixed_point * png_const_fixed_point_p;
|
|
|
614 typedef png_size_t * png_size_tp;
|
|
|
615 typedef const png_size_t * png_const_size_tp;
|
|
|
616
|
|
|
617 #ifdef PNG_STDIO_SUPPORTED
|
|
|
618 typedef FILE * png_FILE_p;
|
|
|
619 #endif
|
|
|
620
|
|
|
621 #ifdef PNG_FLOATING_POINT_SUPPORTED
|
|
|
622 typedef double * png_doublep;
|
|
|
623 typedef const double * png_const_doublep;
|
|
|
624 #endif
|
|
|
625
|
|
|
626 /* Pointers to pointers; i.e. arrays */
|
|
|
627 typedef png_byte * * png_bytepp;
|
|
|
628 typedef png_uint_32 * * png_uint_32pp;
|
|
|
629 typedef png_int_32 * * png_int_32pp;
|
|
|
630 typedef png_uint_16 * * png_uint_16pp;
|
|
|
631 typedef png_int_16 * * png_int_16pp;
|
|
|
632 typedef const char * * png_const_charpp;
|
|
|
633 typedef char * * png_charpp;
|
|
|
634 typedef png_fixed_point * * png_fixed_point_pp;
|
|
|
635 #ifdef PNG_FLOATING_POINT_SUPPORTED
|
|
|
636 typedef double * * png_doublepp;
|
|
|
637 #endif
|
|
|
638
|
|
|
639 /* Pointers to pointers to pointers; i.e., pointer to array */
|
|
|
640 typedef char * * * png_charppp;
|
|
|
641
|
|
|
642 #endif /* PNG_BUILDING_SYMBOL_TABLE */
|
|
|
643
|
|
|
644 #endif /* PNGCONF_H */
|
