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1 |
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2 /* pngpriv.h - private declarations for use inside libpng |
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3 * |
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4 * libpng version 1.4.0 - January 3, 2010 |
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5 * For conditions of distribution and use, see copyright notice in png.h |
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6 * Copyright (c) 1998-2010 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 /* The symbols declared in this file (including the functions declared |
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16 * as PNG_EXTERN) are PRIVATE. They are not part of the libpng public |
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17 * interface, and are not recommended for use by regular applications. |
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18 * Some of them may become public in the future; others may stay private, |
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19 * change in an incompatible way, or even disappear. |
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20 * Although the libpng users are not forbidden to include this header, |
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21 * they should be well aware of the issues that may arise from doing so. |
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22 */ |
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23 |
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24 #ifndef PNGPRIV_H |
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25 #define PNGPRIV_H |
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26 |
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27 #ifndef PNG_VERSION_INFO_ONLY |
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28 |
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29 #include <stdlib.h> |
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30 |
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31 /* The functions exported by PNG_EXTERN are internal functions, which |
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32 * aren't usually used outside the library (as far as I know), so it is |
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33 * debatable if they should be exported at all. In the future, when it |
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34 * is possible to have run-time registry of chunk-handling functions, |
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35 * some of these will be made available again. |
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36 #define PNG_EXTERN extern |
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37 */ |
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38 #define PNG_EXTERN |
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39 |
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40 /* Other defines specific to compilers can go here. Try to keep |
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41 * them inside an appropriate ifdef/endif pair for portability. |
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42 */ |
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43 |
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44 #ifdef PNG_FLOATING_POINT_SUPPORTED |
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45 # ifdef MACOS |
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46 /* We need to check that <math.h> hasn't already been included earlier |
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47 * as it seems it doesn't agree with <fp.h>, yet we should really use |
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48 * <fp.h> if possible. |
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49 */ |
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50 # if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__) |
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51 # include <fp.h> |
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52 # endif |
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53 # else |
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54 # include <math.h> |
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55 # endif |
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56 # if defined(_AMIGA) && defined(__SASC) && defined(_M68881) |
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57 /* Amiga SAS/C: We must include builtin FPU functions when compiling using |
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58 * MATH=68881 |
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59 */ |
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60 # include <m68881.h> |
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61 # endif |
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62 #endif |
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63 |
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64 /* Codewarrior on NT has linking problems without this. */ |
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65 #if (defined(__MWERKS__) && defined(WIN32)) || defined(__STDC__) |
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66 # define PNG_ALWAYS_EXTERN |
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67 #endif |
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68 |
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69 /* This provides the non-ANSI (far) memory allocation routines. */ |
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70 #if defined(__TURBOC__) && defined(__MSDOS__) |
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71 # include <mem.h> |
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72 # include <alloc.h> |
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73 #endif |
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74 |
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75 #if defined(WIN32) || defined(_Windows) || defined(_WINDOWS) || \ |
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76 defined(_WIN32) || defined(__WIN32__) |
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77 # if !defined(__SYMBIAN32__) |
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78 # include <windows.h> /* defines _WINDOWS_ macro */ |
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79 # endif |
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80 /* I have no idea why is this necessary... */ |
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81 # ifdef _MSC_VER |
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82 # include <malloc.h> |
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83 # endif |
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84 #endif |
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85 |
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86 /* Various modes of operation. Note that after an init, mode is set to |
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87 * zero automatically when the structure is created. |
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88 */ |
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89 #define PNG_HAVE_IHDR 0x01 |
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90 #define PNG_HAVE_PLTE 0x02 |
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91 #define PNG_HAVE_IDAT 0x04 |
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92 #define PNG_AFTER_IDAT 0x08 /* Have complete zlib datastream */ |
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93 #define PNG_HAVE_IEND 0x10 |
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94 #define PNG_HAVE_gAMA 0x20 |
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95 #define PNG_HAVE_cHRM 0x40 |
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96 #define PNG_HAVE_sRGB 0x80 |
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97 #define PNG_HAVE_CHUNK_HEADER 0x100 |
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98 #define PNG_WROTE_tIME 0x200 |
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99 #define PNG_WROTE_INFO_BEFORE_PLTE 0x400 |
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100 #define PNG_BACKGROUND_IS_GRAY 0x800 |
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101 #define PNG_HAVE_PNG_SIGNATURE 0x1000 |
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102 #define PNG_HAVE_CHUNK_AFTER_IDAT 0x2000 /* Have another chunk after IDAT */ |
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103 |
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104 /* Flags for the transformations the PNG library does on the image data */ |
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105 #define PNG_BGR 0x0001 |
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106 #define PNG_INTERLACE 0x0002 |
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107 #define PNG_PACK 0x0004 |
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108 #define PNG_SHIFT 0x0008 |
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109 #define PNG_SWAP_BYTES 0x0010 |
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110 #define PNG_INVERT_MONO 0x0020 |
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111 #define PNG_DITHER 0x0040 |
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112 #define PNG_BACKGROUND 0x0080 |
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113 #define PNG_BACKGROUND_EXPAND 0x0100 |
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114 /* 0x0200 unused */ |
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115 #define PNG_16_TO_8 0x0400 |
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116 #define PNG_RGBA 0x0800 |
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117 #define PNG_EXPAND 0x1000 |
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118 #define PNG_GAMMA 0x2000 |
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119 #define PNG_GRAY_TO_RGB 0x4000 |
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120 #define PNG_FILLER 0x8000L |
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121 #define PNG_PACKSWAP 0x10000L |
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122 #define PNG_SWAP_ALPHA 0x20000L |
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123 #define PNG_STRIP_ALPHA 0x40000L |
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124 #define PNG_INVERT_ALPHA 0x80000L |
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125 #define PNG_USER_TRANSFORM 0x100000L |
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126 #define PNG_RGB_TO_GRAY_ERR 0x200000L |
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127 #define PNG_RGB_TO_GRAY_WARN 0x400000L |
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128 #define PNG_RGB_TO_GRAY 0x600000L /* two bits, RGB_TO_GRAY_ERR|WARN */ |
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129 /* 0x800000L Unused */ |
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130 #define PNG_ADD_ALPHA 0x1000000L /* Added to libpng-1.2.7 */ |
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131 #define PNG_EXPAND_tRNS 0x2000000L /* Added to libpng-1.2.9 */ |
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132 /* 0x4000000L unused */ |
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133 /* 0x8000000L unused */ |
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134 /* 0x10000000L unused */ |
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135 /* 0x20000000L unused */ |
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136 /* 0x40000000L unused */ |
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137 |
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138 /* Flags for png_create_struct */ |
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139 #define PNG_STRUCT_PNG 0x0001 |
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140 #define PNG_STRUCT_INFO 0x0002 |
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141 |
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142 /* Scaling factor for filter heuristic weighting calculations */ |
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143 #define PNG_WEIGHT_SHIFT 8 |
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144 #define PNG_WEIGHT_FACTOR (1<<(PNG_WEIGHT_SHIFT)) |
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145 #define PNG_COST_SHIFT 3 |
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146 #define PNG_COST_FACTOR (1<<(PNG_COST_SHIFT)) |
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147 |
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148 /* Flags for the png_ptr->flags rather than declaring a byte for each one */ |
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149 #define PNG_FLAG_ZLIB_CUSTOM_STRATEGY 0x0001 |
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150 #define PNG_FLAG_ZLIB_CUSTOM_LEVEL 0x0002 |
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151 #define PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL 0x0004 |
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152 #define PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS 0x0008 |
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153 #define PNG_FLAG_ZLIB_CUSTOM_METHOD 0x0010 |
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154 #define PNG_FLAG_ZLIB_FINISHED 0x0020 |
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155 #define PNG_FLAG_ROW_INIT 0x0040 |
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156 #define PNG_FLAG_FILLER_AFTER 0x0080 |
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157 #define PNG_FLAG_CRC_ANCILLARY_USE 0x0100 |
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158 #define PNG_FLAG_CRC_ANCILLARY_NOWARN 0x0200 |
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159 #define PNG_FLAG_CRC_CRITICAL_USE 0x0400 |
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160 #define PNG_FLAG_CRC_CRITICAL_IGNORE 0x0800 |
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161 /* 0x1000 unused */ |
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162 /* 0x2000 unused */ |
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163 /* 0x4000 unused */ |
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164 #define PNG_FLAG_KEEP_UNKNOWN_CHUNKS 0x8000L |
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165 #define PNG_FLAG_KEEP_UNSAFE_CHUNKS 0x10000L |
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166 #define PNG_FLAG_LIBRARY_MISMATCH 0x20000L |
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167 #define PNG_FLAG_STRIP_ERROR_NUMBERS 0x40000L |
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168 #define PNG_FLAG_STRIP_ERROR_TEXT 0x80000L |
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169 #define PNG_FLAG_MALLOC_NULL_MEM_OK 0x100000L |
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170 #define PNG_FLAG_ADD_ALPHA 0x200000L /* Added to libpng-1.2.8 */ |
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171 #define PNG_FLAG_STRIP_ALPHA 0x400000L /* Added to libpng-1.2.8 */ |
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172 #define PNG_FLAG_BENIGN_ERRORS_WARN 0x800000L /* Added to libpng-1.4.0 */ |
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173 /* 0x1000000L unused */ |
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174 /* 0x2000000L unused */ |
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175 /* 0x4000000L unused */ |
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176 /* 0x8000000L unused */ |
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177 /* 0x10000000L unused */ |
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178 /* 0x20000000L unused */ |
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179 /* 0x40000000L unused */ |
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180 |
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181 #define PNG_FLAG_CRC_ANCILLARY_MASK (PNG_FLAG_CRC_ANCILLARY_USE | \ |
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182 PNG_FLAG_CRC_ANCILLARY_NOWARN) |
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183 |
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184 #define PNG_FLAG_CRC_CRITICAL_MASK (PNG_FLAG_CRC_CRITICAL_USE | \ |
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185 PNG_FLAG_CRC_CRITICAL_IGNORE) |
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186 |
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187 #define PNG_FLAG_CRC_MASK (PNG_FLAG_CRC_ANCILLARY_MASK | \ |
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188 PNG_FLAG_CRC_CRITICAL_MASK) |
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189 |
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190 /* Save typing and make code easier to understand */ |
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191 |
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192 #define PNG_COLOR_DIST(c1, c2) (abs((int)((c1).red) - (int)((c2).red)) + \ |
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193 abs((int)((c1).green) - (int)((c2).green)) + \ |
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194 abs((int)((c1).blue) - (int)((c2).blue))) |
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195 |
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196 /* Added to libpng-1.2.6 JB */ |
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197 #define PNG_ROWBYTES(pixel_bits, width) \ |
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198 ((pixel_bits) >= 8 ? \ |
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199 ((png_size_t)(width) * (((png_size_t)(pixel_bits)) >> 3)) : \ |
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200 (( ((png_size_t)(width) * ((png_size_t)(pixel_bits))) + 7) >> 3) ) |
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201 |
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202 /* PNG_OUT_OF_RANGE returns true if value is outside the range |
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203 * ideal-delta..ideal+delta. Each argument is evaluated twice. |
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204 * "ideal" and "delta" should be constants, normally simple |
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205 * integers, "value" a variable. Added to libpng-1.2.6 JB |
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206 */ |
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207 #define PNG_OUT_OF_RANGE(value, ideal, delta) \ |
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208 ( (value) < (ideal)-(delta) || (value) > (ideal)+(delta) ) |
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209 |
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210 /* Constant strings for known chunk types. If you need to add a chunk, |
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211 * define the name here, and add an invocation of the macro wherever it's |
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212 * needed. |
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213 */ |
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214 #define PNG_IHDR PNG_CONST png_byte png_IHDR[5] = { 73, 72, 68, 82, '\0'} |
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215 #define PNG_IDAT PNG_CONST png_byte png_IDAT[5] = { 73, 68, 65, 84, '\0'} |
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216 #define PNG_IEND PNG_CONST png_byte png_IEND[5] = { 73, 69, 78, 68, '\0'} |
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217 #define PNG_PLTE PNG_CONST png_byte png_PLTE[5] = { 80, 76, 84, 69, '\0'} |
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218 #define PNG_bKGD PNG_CONST png_byte png_bKGD[5] = { 98, 75, 71, 68, '\0'} |
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219 #define PNG_cHRM PNG_CONST png_byte png_cHRM[5] = { 99, 72, 82, 77, '\0'} |
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220 #define PNG_gAMA PNG_CONST png_byte png_gAMA[5] = {103, 65, 77, 65, '\0'} |
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221 #define PNG_hIST PNG_CONST png_byte png_hIST[5] = {104, 73, 83, 84, '\0'} |
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222 #define PNG_iCCP PNG_CONST png_byte png_iCCP[5] = {105, 67, 67, 80, '\0'} |
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223 #define PNG_iTXt PNG_CONST png_byte png_iTXt[5] = {105, 84, 88, 116, '\0'} |
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224 #define PNG_oFFs PNG_CONST png_byte png_oFFs[5] = {111, 70, 70, 115, '\0'} |
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225 #define PNG_pCAL PNG_CONST png_byte png_pCAL[5] = {112, 67, 65, 76, '\0'} |
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226 #define PNG_sCAL PNG_CONST png_byte png_sCAL[5] = {115, 67, 65, 76, '\0'} |
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227 #define PNG_pHYs PNG_CONST png_byte png_pHYs[5] = {112, 72, 89, 115, '\0'} |
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228 #define PNG_sBIT PNG_CONST png_byte png_sBIT[5] = {115, 66, 73, 84, '\0'} |
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229 #define PNG_sPLT PNG_CONST png_byte png_sPLT[5] = {115, 80, 76, 84, '\0'} |
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230 #define PNG_sRGB PNG_CONST png_byte png_sRGB[5] = {115, 82, 71, 66, '\0'} |
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231 #define PNG_sTER PNG_CONST png_byte png_sTER[5] = {115, 84, 69, 82, '\0'} |
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232 #define PNG_tEXt PNG_CONST png_byte png_tEXt[5] = {116, 69, 88, 116, '\0'} |
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233 #define PNG_tIME PNG_CONST png_byte png_tIME[5] = {116, 73, 77, 69, '\0'} |
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234 #define PNG_tRNS PNG_CONST png_byte png_tRNS[5] = {116, 82, 78, 83, '\0'} |
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235 #define PNG_zTXt PNG_CONST png_byte png_zTXt[5] = {122, 84, 88, 116, '\0'} |
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236 |
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237 |
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238 /* Inhibit C++ name-mangling for libpng functions but not for system calls. */ |
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239 #ifdef __cplusplus |
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240 extern "C" { |
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241 #endif /* __cplusplus */ |
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242 |
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243 /* These functions are used internally in the code. They generally |
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244 * shouldn't be used unless you are writing code to add or replace some |
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245 * functionality in libpng. More information about most functions can |
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246 * be found in the files where the functions are located. |
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247 */ |
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248 |
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249 /* Allocate memory for an internal libpng struct */ |
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250 PNG_EXTERN png_voidp png_create_struct PNGARG((int type)); |
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251 |
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252 /* Free memory from internal libpng struct */ |
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253 PNG_EXTERN void png_destroy_struct PNGARG((png_voidp struct_ptr)); |
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254 |
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255 PNG_EXTERN png_voidp png_create_struct_2 PNGARG((int type, png_malloc_ptr |
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256 malloc_fn, png_voidp mem_ptr)); |
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257 PNG_EXTERN void png_destroy_struct_2 PNGARG((png_voidp struct_ptr, |
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258 png_free_ptr free_fn, png_voidp mem_ptr)); |
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259 |
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260 /* Free any memory that info_ptr points to and reset struct. */ |
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261 PNG_EXTERN void png_info_destroy PNGARG((png_structp png_ptr, |
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262 png_infop info_ptr)); |
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263 |
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264 /* Function to allocate memory for zlib. PNGAPI is disallowed. */ |
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265 PNG_EXTERN voidpf png_zalloc PNGARG((voidpf png_ptr, uInt items, uInt size)); |
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266 |
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267 /* Function to free memory for zlib. PNGAPI is disallowed. */ |
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268 PNG_EXTERN void png_zfree PNGARG((voidpf png_ptr, voidpf ptr)); |
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269 |
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270 /* Next four functions are used internally as callbacks. PNGAPI is required |
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271 * but not PNG_EXPORT. PNGAPI added at libpng version 1.2.3. */ |
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272 |
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273 PNG_EXTERN void PNGAPI png_default_read_data PNGARG((png_structp png_ptr, |
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274 png_bytep data, png_size_t length)); |
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275 |
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276 #ifdef PNG_PROGRESSIVE_READ_SUPPORTED |
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277 PNG_EXTERN void PNGAPI png_push_fill_buffer PNGARG((png_structp png_ptr, |
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278 png_bytep buffer, png_size_t length)); |
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279 #endif |
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280 |
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281 PNG_EXTERN void PNGAPI png_default_write_data PNGARG((png_structp png_ptr, |
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282 png_bytep data, png_size_t length)); |
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283 |
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284 #ifdef PNG_WRITE_FLUSH_SUPPORTED |
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285 #ifdef PNG_STDIO_SUPPORTED |
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286 PNG_EXTERN void PNGAPI png_default_flush PNGARG((png_structp png_ptr)); |
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287 #endif |
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288 #endif |
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289 |
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290 /* Reset the CRC variable */ |
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291 PNG_EXTERN void png_reset_crc PNGARG((png_structp png_ptr)); |
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292 |
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293 /* Write the "data" buffer to whatever output you are using */ |
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294 PNG_EXTERN void png_write_data PNGARG((png_structp png_ptr, png_bytep data, |
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295 png_size_t length)); |
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296 |
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297 /* Read the chunk header (length + type name) */ |
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298 PNG_EXTERN png_uint_32 png_read_chunk_header PNGARG((png_structp png_ptr)); |
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299 |
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300 /* Read data from whatever input you are using into the "data" buffer */ |
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301 PNG_EXTERN void png_read_data PNGARG((png_structp png_ptr, png_bytep data, |
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302 png_size_t length)); |
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303 |
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304 /* Read bytes into buf, and update png_ptr->crc */ |
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305 PNG_EXTERN void png_crc_read PNGARG((png_structp png_ptr, png_bytep buf, |
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306 png_size_t length)); |
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307 |
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308 /* Decompress data in a chunk that uses compression */ |
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309 #if defined(PNG_zTXt_SUPPORTED) || defined(PNG_iTXt_SUPPORTED) || \ |
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310 defined(PNG_iCCP_SUPPORTED) || defined(PNG_sPLT_SUPPORTED) |
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311 PNG_EXTERN void png_decompress_chunk PNGARG((png_structp png_ptr, |
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312 int comp_type, png_size_t chunklength, png_size_t prefix_length, |
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313 png_size_t *data_length)); |
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314 #endif |
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315 |
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316 /* Read "skip" bytes, read the file crc, and (optionally) verify png_ptr->crc */ |
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317 PNG_EXTERN int png_crc_finish PNGARG((png_structp png_ptr, png_uint_32 skip)); |
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318 |
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319 /* Read the CRC from the file and compare it to the libpng calculated CRC */ |
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320 PNG_EXTERN int png_crc_error PNGARG((png_structp png_ptr)); |
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321 |
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322 /* Calculate the CRC over a section of data. Note that we are only |
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323 * passing a maximum of 64K on systems that have this as a memory limit, |
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324 * since this is the maximum buffer size we can specify. |
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325 */ |
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326 PNG_EXTERN void png_calculate_crc PNGARG((png_structp png_ptr, png_bytep ptr, |
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327 png_size_t length)); |
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328 |
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329 #ifdef PNG_WRITE_FLUSH_SUPPORTED |
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330 PNG_EXTERN void png_flush PNGARG((png_structp png_ptr)); |
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331 #endif |
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332 |
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333 /* Write various chunks */ |
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334 |
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335 /* Write the IHDR chunk, and update the png_struct with the necessary |
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336 * information. |
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337 */ |
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338 PNG_EXTERN void png_write_IHDR PNGARG((png_structp png_ptr, png_uint_32 width, |
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339 png_uint_32 height, |
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340 int bit_depth, int color_type, int compression_method, int filter_method, |
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341 int interlace_method)); |
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342 |
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343 PNG_EXTERN void png_write_PLTE PNGARG((png_structp png_ptr, png_colorp palette, |
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344 png_uint_32 num_pal)); |
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345 |
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346 PNG_EXTERN void png_write_IDAT PNGARG((png_structp png_ptr, png_bytep data, |
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347 png_size_t length)); |
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348 |
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349 PNG_EXTERN void png_write_IEND PNGARG((png_structp png_ptr)); |
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350 |
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351 #ifdef PNG_WRITE_gAMA_SUPPORTED |
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352 #ifdef PNG_FLOATING_POINT_SUPPORTED |
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353 PNG_EXTERN void png_write_gAMA PNGARG((png_structp png_ptr, double file_gamma)); |
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354 #endif |
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355 #ifdef PNG_FIXED_POINT_SUPPORTED |
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356 PNG_EXTERN void png_write_gAMA_fixed PNGARG((png_structp png_ptr, png_fixed_point |
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357 file_gamma)); |
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358 #endif |
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359 #endif |
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360 |
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361 #ifdef PNG_WRITE_sBIT_SUPPORTED |
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362 PNG_EXTERN void png_write_sBIT PNGARG((png_structp png_ptr, png_color_8p sbit, |
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363 int color_type)); |
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364 #endif |
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365 |
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366 #ifdef PNG_WRITE_cHRM_SUPPORTED |
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367 #ifdef PNG_FLOATING_POINT_SUPPORTED |
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368 PNG_EXTERN void png_write_cHRM PNGARG((png_structp png_ptr, |
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369 double white_x, double white_y, |
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370 double red_x, double red_y, double green_x, double green_y, |
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371 double blue_x, double blue_y)); |
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372 #endif |
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373 PNG_EXTERN void png_write_cHRM_fixed PNGARG((png_structp png_ptr, |
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374 png_fixed_point int_white_x, png_fixed_point int_white_y, |
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375 png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point |
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376 int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x, |
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377 png_fixed_point int_blue_y)); |
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378 #endif |
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379 |
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380 #ifdef PNG_WRITE_sRGB_SUPPORTED |
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381 PNG_EXTERN void png_write_sRGB PNGARG((png_structp png_ptr, |
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382 int intent)); |
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383 #endif |
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384 |
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385 #ifdef PNG_WRITE_iCCP_SUPPORTED |
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386 PNG_EXTERN void png_write_iCCP PNGARG((png_structp png_ptr, |
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387 png_charp name, int compression_type, |
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388 png_charp profile, int proflen)); |
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389 /* Note to maintainer: profile should be png_bytep */ |
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390 #endif |
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391 |
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392 #ifdef PNG_WRITE_sPLT_SUPPORTED |
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393 PNG_EXTERN void png_write_sPLT PNGARG((png_structp png_ptr, |
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394 png_sPLT_tp palette)); |
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395 #endif |
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396 |
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397 #ifdef PNG_WRITE_tRNS_SUPPORTED |
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398 PNG_EXTERN void png_write_tRNS PNGARG((png_structp png_ptr, png_bytep trans, |
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399 png_color_16p values, int number, int color_type)); |
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400 #endif |
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401 |
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402 #ifdef PNG_WRITE_bKGD_SUPPORTED |
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403 PNG_EXTERN void png_write_bKGD PNGARG((png_structp png_ptr, |
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404 png_color_16p values, int color_type)); |
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405 #endif |
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406 |
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407 #ifdef PNG_WRITE_hIST_SUPPORTED |
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408 PNG_EXTERN void png_write_hIST PNGARG((png_structp png_ptr, png_uint_16p hist, |
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409 int num_hist)); |
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410 #endif |
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411 |
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412 #if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \ |
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413 defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED) |
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414 PNG_EXTERN png_size_t png_check_keyword PNGARG((png_structp png_ptr, |
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415 png_charp key, png_charpp new_key)); |
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416 #endif |
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417 |
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418 #ifdef PNG_WRITE_tEXt_SUPPORTED |
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419 PNG_EXTERN void png_write_tEXt PNGARG((png_structp png_ptr, png_charp key, |
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420 png_charp text, png_size_t text_len)); |
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421 #endif |
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422 |
|
423 #ifdef PNG_WRITE_zTXt_SUPPORTED |
|
424 PNG_EXTERN void png_write_zTXt PNGARG((png_structp png_ptr, png_charp key, |
|
425 png_charp text, png_size_t text_len, int compression)); |
|
426 #endif |
|
427 |
|
428 #ifdef PNG_WRITE_iTXt_SUPPORTED |
|
429 PNG_EXTERN void png_write_iTXt PNGARG((png_structp png_ptr, |
|
430 int compression, png_charp key, png_charp lang, png_charp lang_key, |
|
431 png_charp text)); |
|
432 #endif |
|
433 |
|
434 #ifdef PNG_TEXT_SUPPORTED /* Added at version 1.0.14 and 1.2.4 */ |
|
435 PNG_EXTERN int png_set_text_2 PNGARG((png_structp png_ptr, |
|
436 png_infop info_ptr, png_textp text_ptr, int num_text)); |
|
437 #endif |
|
438 |
|
439 #ifdef PNG_WRITE_oFFs_SUPPORTED |
|
440 PNG_EXTERN void png_write_oFFs PNGARG((png_structp png_ptr, |
|
441 png_int_32 x_offset, png_int_32 y_offset, int unit_type)); |
|
442 #endif |
|
443 |
|
444 #ifdef PNG_WRITE_pCAL_SUPPORTED |
|
445 PNG_EXTERN void png_write_pCAL PNGARG((png_structp png_ptr, png_charp purpose, |
|
446 png_int_32 X0, png_int_32 X1, int type, int nparams, |
|
447 png_charp units, png_charpp params)); |
|
448 #endif |
|
449 |
|
450 #ifdef PNG_WRITE_pHYs_SUPPORTED |
|
451 PNG_EXTERN void png_write_pHYs PNGARG((png_structp png_ptr, |
|
452 png_uint_32 x_pixels_per_unit, png_uint_32 y_pixels_per_unit, |
|
453 int unit_type)); |
|
454 #endif |
|
455 |
|
456 #ifdef PNG_WRITE_tIME_SUPPORTED |
|
457 PNG_EXTERN void png_write_tIME PNGARG((png_structp png_ptr, |
|
458 png_timep mod_time)); |
|
459 #endif |
|
460 |
|
461 #ifdef PNG_WRITE_sCAL_SUPPORTED |
|
462 #if defined(PNG_FLOATING_POINT_SUPPORTED) && defined(PNG_STDIO_SUPPORTED) |
|
463 PNG_EXTERN void png_write_sCAL PNGARG((png_structp png_ptr, |
|
464 int unit, double width, double height)); |
|
465 #else |
|
466 #ifdef PNG_FIXED_POINT_SUPPORTED |
|
467 PNG_EXTERN void png_write_sCAL_s PNGARG((png_structp png_ptr, |
|
468 int unit, png_charp width, png_charp height)); |
|
469 #endif |
|
470 #endif |
|
471 #endif |
|
472 |
|
473 /* Called when finished processing a row of data */ |
|
474 PNG_EXTERN void png_write_finish_row PNGARG((png_structp png_ptr)); |
|
475 |
|
476 /* Internal use only. Called before first row of data */ |
|
477 PNG_EXTERN void png_write_start_row PNGARG((png_structp png_ptr)); |
|
478 |
|
479 #ifdef PNG_READ_GAMMA_SUPPORTED |
|
480 PNG_EXTERN void png_build_gamma_table PNGARG((png_structp png_ptr, |
|
481 png_byte bit_depth)); |
|
482 #endif |
|
483 |
|
484 /* Combine a row of data, dealing with alpha, etc. if requested */ |
|
485 PNG_EXTERN void png_combine_row PNGARG((png_structp png_ptr, png_bytep row, |
|
486 int mask)); |
|
487 |
|
488 #ifdef PNG_READ_INTERLACING_SUPPORTED |
|
489 /* Expand an interlaced row */ |
|
490 /* OLD pre-1.0.9 interface: |
|
491 PNG_EXTERN void png_do_read_interlace PNGARG((png_row_infop row_info, |
|
492 png_bytep row, int pass, png_uint_32 transformations)); |
|
493 */ |
|
494 PNG_EXTERN void png_do_read_interlace PNGARG((png_structp png_ptr)); |
|
495 #endif |
|
496 |
|
497 /* GRR TO DO (2.0 or whenever): simplify other internal calling interfaces */ |
|
498 |
|
499 #ifdef PNG_WRITE_INTERLACING_SUPPORTED |
|
500 /* Grab pixels out of a row for an interlaced pass */ |
|
501 PNG_EXTERN void png_do_write_interlace PNGARG((png_row_infop row_info, |
|
502 png_bytep row, int pass)); |
|
503 #endif |
|
504 |
|
505 /* Unfilter a row */ |
|
506 PNG_EXTERN void png_read_filter_row PNGARG((png_structp png_ptr, |
|
507 png_row_infop row_info, png_bytep row, png_bytep prev_row, int filter)); |
|
508 |
|
509 /* Choose the best filter to use and filter the row data */ |
|
510 PNG_EXTERN void png_write_find_filter PNGARG((png_structp png_ptr, |
|
511 png_row_infop row_info)); |
|
512 |
|
513 /* Write out the filtered row. */ |
|
514 PNG_EXTERN void png_write_filtered_row PNGARG((png_structp png_ptr, |
|
515 png_bytep filtered_row)); |
|
516 /* Finish a row while reading, dealing with interlacing passes, etc. */ |
|
517 PNG_EXTERN void png_read_finish_row PNGARG((png_structp png_ptr)); |
|
518 |
|
519 /* Initialize the row buffers, etc. */ |
|
520 PNG_EXTERN void png_read_start_row PNGARG((png_structp png_ptr)); |
|
521 /* Optional call to update the users info structure */ |
|
522 PNG_EXTERN void png_read_transform_info PNGARG((png_structp png_ptr, |
|
523 png_infop info_ptr)); |
|
524 |
|
525 /* These are the functions that do the transformations */ |
|
526 #ifdef PNG_READ_FILLER_SUPPORTED |
|
527 PNG_EXTERN void png_do_read_filler PNGARG((png_row_infop row_info, |
|
528 png_bytep row, png_uint_32 filler, png_uint_32 flags)); |
|
529 #endif |
|
530 |
|
531 #ifdef PNG_READ_SWAP_ALPHA_SUPPORTED |
|
532 PNG_EXTERN void png_do_read_swap_alpha PNGARG((png_row_infop row_info, |
|
533 png_bytep row)); |
|
534 #endif |
|
535 |
|
536 #ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED |
|
537 PNG_EXTERN void png_do_write_swap_alpha PNGARG((png_row_infop row_info, |
|
538 png_bytep row)); |
|
539 #endif |
|
540 |
|
541 #ifdef PNG_READ_INVERT_ALPHA_SUPPORTED |
|
542 PNG_EXTERN void png_do_read_invert_alpha PNGARG((png_row_infop row_info, |
|
543 png_bytep row)); |
|
544 #endif |
|
545 |
|
546 #ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED |
|
547 PNG_EXTERN void png_do_write_invert_alpha PNGARG((png_row_infop row_info, |
|
548 png_bytep row)); |
|
549 #endif |
|
550 |
|
551 #if defined(PNG_WRITE_FILLER_SUPPORTED) || \ |
|
552 defined(PNG_READ_STRIP_ALPHA_SUPPORTED) |
|
553 PNG_EXTERN void png_do_strip_filler PNGARG((png_row_infop row_info, |
|
554 png_bytep row, png_uint_32 flags)); |
|
555 #endif |
|
556 |
|
557 #if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) |
|
558 PNG_EXTERN void png_do_swap PNGARG((png_row_infop row_info, png_bytep row)); |
|
559 #endif |
|
560 |
|
561 #if defined(PNG_READ_PACKSWAP_SUPPORTED) || defined(PNG_WRITE_PACKSWAP_SUPPORTED) |
|
562 PNG_EXTERN void png_do_packswap PNGARG((png_row_infop row_info, png_bytep row)); |
|
563 #endif |
|
564 |
|
565 #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED |
|
566 PNG_EXTERN int png_do_rgb_to_gray PNGARG((png_structp png_ptr, png_row_infop |
|
567 row_info, png_bytep row)); |
|
568 #endif |
|
569 |
|
570 #ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED |
|
571 PNG_EXTERN void png_do_gray_to_rgb PNGARG((png_row_infop row_info, |
|
572 png_bytep row)); |
|
573 #endif |
|
574 |
|
575 #ifdef PNG_READ_PACK_SUPPORTED |
|
576 PNG_EXTERN void png_do_unpack PNGARG((png_row_infop row_info, png_bytep row)); |
|
577 #endif |
|
578 |
|
579 #ifdef PNG_READ_SHIFT_SUPPORTED |
|
580 PNG_EXTERN void png_do_unshift PNGARG((png_row_infop row_info, png_bytep row, |
|
581 png_color_8p sig_bits)); |
|
582 #endif |
|
583 |
|
584 #if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) |
|
585 PNG_EXTERN void png_do_invert PNGARG((png_row_infop row_info, png_bytep row)); |
|
586 #endif |
|
587 |
|
588 #ifdef PNG_READ_16_TO_8_SUPPORTED |
|
589 PNG_EXTERN void png_do_chop PNGARG((png_row_infop row_info, png_bytep row)); |
|
590 #endif |
|
591 |
|
592 #ifdef PNG_READ_DITHER_SUPPORTED |
|
593 PNG_EXTERN void png_do_dither PNGARG((png_row_infop row_info, |
|
594 png_bytep row, png_bytep palette_lookup, png_bytep dither_lookup)); |
|
595 |
|
596 # ifdef PNG_CORRECT_PALETTE_SUPPORTED |
|
597 PNG_EXTERN void png_correct_palette PNGARG((png_structp png_ptr, |
|
598 png_colorp palette, int num_palette)); |
|
599 # endif |
|
600 #endif |
|
601 |
|
602 #if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) |
|
603 PNG_EXTERN void png_do_bgr PNGARG((png_row_infop row_info, png_bytep row)); |
|
604 #endif |
|
605 |
|
606 #ifdef PNG_WRITE_PACK_SUPPORTED |
|
607 PNG_EXTERN void png_do_pack PNGARG((png_row_infop row_info, |
|
608 png_bytep row, png_uint_32 bit_depth)); |
|
609 #endif |
|
610 |
|
611 #ifdef PNG_WRITE_SHIFT_SUPPORTED |
|
612 PNG_EXTERN void png_do_shift PNGARG((png_row_infop row_info, png_bytep row, |
|
613 png_color_8p bit_depth)); |
|
614 #endif |
|
615 |
|
616 #ifdef PNG_READ_BACKGROUND_SUPPORTED |
|
617 #ifdef PNG_READ_GAMMA_SUPPORTED |
|
618 PNG_EXTERN void png_do_background PNGARG((png_row_infop row_info, png_bytep row, |
|
619 png_color_16p trans_color, png_color_16p background, |
|
620 png_color_16p background_1, |
|
621 png_bytep gamma_table, png_bytep gamma_from_1, png_bytep gamma_to_1, |
|
622 png_uint_16pp gamma_16, png_uint_16pp gamma_16_from_1, |
|
623 png_uint_16pp gamma_16_to_1, int gamma_shift)); |
|
624 #else |
|
625 PNG_EXTERN void png_do_background PNGARG((png_row_infop row_info, png_bytep row, |
|
626 png_color_16p trans_color, png_color_16p background)); |
|
627 #endif |
|
628 #endif |
|
629 |
|
630 #ifdef PNG_READ_GAMMA_SUPPORTED |
|
631 PNG_EXTERN void png_do_gamma PNGARG((png_row_infop row_info, png_bytep row, |
|
632 png_bytep gamma_table, png_uint_16pp gamma_16_table, |
|
633 int gamma_shift)); |
|
634 #endif |
|
635 |
|
636 #ifdef PNG_READ_EXPAND_SUPPORTED |
|
637 PNG_EXTERN void png_do_expand_palette PNGARG((png_row_infop row_info, |
|
638 png_bytep row, png_colorp palette, png_bytep trans, int num_trans)); |
|
639 PNG_EXTERN void png_do_expand PNGARG((png_row_infop row_info, |
|
640 png_bytep row, png_color_16p trans_value)); |
|
641 #endif |
|
642 |
|
643 /* The following decodes the appropriate chunks, and does error correction, |
|
644 * then calls the appropriate callback for the chunk if it is valid. |
|
645 */ |
|
646 |
|
647 /* Decode the IHDR chunk */ |
|
648 PNG_EXTERN void png_handle_IHDR PNGARG((png_structp png_ptr, png_infop info_ptr, |
|
649 png_uint_32 length)); |
|
650 PNG_EXTERN void png_handle_PLTE PNGARG((png_structp png_ptr, png_infop info_ptr, |
|
651 png_uint_32 length)); |
|
652 PNG_EXTERN void png_handle_IEND PNGARG((png_structp png_ptr, png_infop info_ptr, |
|
653 png_uint_32 length)); |
|
654 |
|
655 #ifdef PNG_READ_bKGD_SUPPORTED |
|
656 PNG_EXTERN void png_handle_bKGD PNGARG((png_structp png_ptr, png_infop info_ptr, |
|
657 png_uint_32 length)); |
|
658 #endif |
|
659 |
|
660 #ifdef PNG_READ_cHRM_SUPPORTED |
|
661 PNG_EXTERN void png_handle_cHRM PNGARG((png_structp png_ptr, png_infop info_ptr, |
|
662 png_uint_32 length)); |
|
663 #endif |
|
664 |
|
665 #ifdef PNG_READ_gAMA_SUPPORTED |
|
666 PNG_EXTERN void png_handle_gAMA PNGARG((png_structp png_ptr, png_infop info_ptr, |
|
667 png_uint_32 length)); |
|
668 #endif |
|
669 |
|
670 #ifdef PNG_READ_hIST_SUPPORTED |
|
671 PNG_EXTERN void png_handle_hIST PNGARG((png_structp png_ptr, png_infop info_ptr, |
|
672 png_uint_32 length)); |
|
673 #endif |
|
674 |
|
675 #ifdef PNG_READ_iCCP_SUPPORTED |
|
676 extern void png_handle_iCCP PNGARG((png_structp png_ptr, png_infop info_ptr, |
|
677 png_uint_32 length)); |
|
678 #endif /* PNG_READ_iCCP_SUPPORTED */ |
|
679 |
|
680 #ifdef PNG_READ_iTXt_SUPPORTED |
|
681 PNG_EXTERN void png_handle_iTXt PNGARG((png_structp png_ptr, png_infop info_ptr, |
|
682 png_uint_32 length)); |
|
683 #endif |
|
684 |
|
685 #ifdef PNG_READ_oFFs_SUPPORTED |
|
686 PNG_EXTERN void png_handle_oFFs PNGARG((png_structp png_ptr, png_infop info_ptr, |
|
687 png_uint_32 length)); |
|
688 #endif |
|
689 |
|
690 #ifdef PNG_READ_pCAL_SUPPORTED |
|
691 PNG_EXTERN void png_handle_pCAL PNGARG((png_structp png_ptr, png_infop info_ptr, |
|
692 png_uint_32 length)); |
|
693 #endif |
|
694 |
|
695 #ifdef PNG_READ_pHYs_SUPPORTED |
|
696 PNG_EXTERN void png_handle_pHYs PNGARG((png_structp png_ptr, png_infop info_ptr, |
|
697 png_uint_32 length)); |
|
698 #endif |
|
699 |
|
700 #ifdef PNG_READ_sBIT_SUPPORTED |
|
701 PNG_EXTERN void png_handle_sBIT PNGARG((png_structp png_ptr, png_infop info_ptr, |
|
702 png_uint_32 length)); |
|
703 #endif |
|
704 |
|
705 #ifdef PNG_READ_sCAL_SUPPORTED |
|
706 PNG_EXTERN void png_handle_sCAL PNGARG((png_structp png_ptr, png_infop info_ptr, |
|
707 png_uint_32 length)); |
|
708 #endif |
|
709 |
|
710 #ifdef PNG_READ_sPLT_SUPPORTED |
|
711 extern void png_handle_sPLT PNGARG((png_structp png_ptr, png_infop info_ptr, |
|
712 png_uint_32 length)); |
|
713 #endif /* PNG_READ_sPLT_SUPPORTED */ |
|
714 |
|
715 #ifdef PNG_READ_sRGB_SUPPORTED |
|
716 PNG_EXTERN void png_handle_sRGB PNGARG((png_structp png_ptr, png_infop info_ptr, |
|
717 png_uint_32 length)); |
|
718 #endif |
|
719 |
|
720 #ifdef PNG_READ_tEXt_SUPPORTED |
|
721 PNG_EXTERN void png_handle_tEXt PNGARG((png_structp png_ptr, png_infop info_ptr, |
|
722 png_uint_32 length)); |
|
723 #endif |
|
724 |
|
725 #ifdef PNG_READ_tIME_SUPPORTED |
|
726 PNG_EXTERN void png_handle_tIME PNGARG((png_structp png_ptr, png_infop info_ptr, |
|
727 png_uint_32 length)); |
|
728 #endif |
|
729 |
|
730 #ifdef PNG_READ_tRNS_SUPPORTED |
|
731 PNG_EXTERN void png_handle_tRNS PNGARG((png_structp png_ptr, png_infop info_ptr, |
|
732 png_uint_32 length)); |
|
733 #endif |
|
734 |
|
735 #ifdef PNG_READ_zTXt_SUPPORTED |
|
736 PNG_EXTERN void png_handle_zTXt PNGARG((png_structp png_ptr, png_infop info_ptr, |
|
737 png_uint_32 length)); |
|
738 #endif |
|
739 |
|
740 PNG_EXTERN void png_handle_unknown PNGARG((png_structp png_ptr, |
|
741 png_infop info_ptr, png_uint_32 length)); |
|
742 |
|
743 PNG_EXTERN void png_check_chunk_name PNGARG((png_structp png_ptr, |
|
744 png_bytep chunk_name)); |
|
745 |
|
746 /* Handle the transformations for reading and writing */ |
|
747 PNG_EXTERN void png_do_read_transformations PNGARG((png_structp png_ptr)); |
|
748 PNG_EXTERN void png_do_write_transformations PNGARG((png_structp png_ptr)); |
|
749 |
|
750 PNG_EXTERN void png_init_read_transformations PNGARG((png_structp png_ptr)); |
|
751 |
|
752 #ifdef PNG_PROGRESSIVE_READ_SUPPORTED |
|
753 PNG_EXTERN void png_push_read_chunk PNGARG((png_structp png_ptr, |
|
754 png_infop info_ptr)); |
|
755 PNG_EXTERN void png_push_read_sig PNGARG((png_structp png_ptr, |
|
756 png_infop info_ptr)); |
|
757 PNG_EXTERN void png_push_check_crc PNGARG((png_structp png_ptr)); |
|
758 PNG_EXTERN void png_push_crc_skip PNGARG((png_structp png_ptr, |
|
759 png_uint_32 length)); |
|
760 PNG_EXTERN void png_push_crc_finish PNGARG((png_structp png_ptr)); |
|
761 PNG_EXTERN void png_push_save_buffer PNGARG((png_structp png_ptr)); |
|
762 PNG_EXTERN void png_push_restore_buffer PNGARG((png_structp png_ptr, |
|
763 png_bytep buffer, png_size_t buffer_length)); |
|
764 PNG_EXTERN void png_push_read_IDAT PNGARG((png_structp png_ptr)); |
|
765 PNG_EXTERN void png_process_IDAT_data PNGARG((png_structp png_ptr, |
|
766 png_bytep buffer, png_size_t buffer_length)); |
|
767 PNG_EXTERN void png_push_process_row PNGARG((png_structp png_ptr)); |
|
768 PNG_EXTERN void png_push_handle_unknown PNGARG((png_structp png_ptr, |
|
769 png_infop info_ptr, png_uint_32 length)); |
|
770 PNG_EXTERN void png_push_have_info PNGARG((png_structp png_ptr, |
|
771 png_infop info_ptr)); |
|
772 PNG_EXTERN void png_push_have_end PNGARG((png_structp png_ptr, |
|
773 png_infop info_ptr)); |
|
774 PNG_EXTERN void png_push_have_row PNGARG((png_structp png_ptr, png_bytep row)); |
|
775 PNG_EXTERN void png_push_read_end PNGARG((png_structp png_ptr, |
|
776 png_infop info_ptr)); |
|
777 PNG_EXTERN void png_process_some_data PNGARG((png_structp png_ptr, |
|
778 png_infop info_ptr)); |
|
779 PNG_EXTERN void png_read_push_finish_row PNGARG((png_structp png_ptr)); |
|
780 #ifdef PNG_READ_tEXt_SUPPORTED |
|
781 PNG_EXTERN void png_push_handle_tEXt PNGARG((png_structp png_ptr, |
|
782 png_infop info_ptr, png_uint_32 length)); |
|
783 PNG_EXTERN void png_push_read_tEXt PNGARG((png_structp png_ptr, |
|
784 png_infop info_ptr)); |
|
785 #endif |
|
786 #ifdef PNG_READ_zTXt_SUPPORTED |
|
787 PNG_EXTERN void png_push_handle_zTXt PNGARG((png_structp png_ptr, |
|
788 png_infop info_ptr, png_uint_32 length)); |
|
789 PNG_EXTERN void png_push_read_zTXt PNGARG((png_structp png_ptr, |
|
790 png_infop info_ptr)); |
|
791 #endif |
|
792 #ifdef PNG_READ_iTXt_SUPPORTED |
|
793 PNG_EXTERN void png_push_handle_iTXt PNGARG((png_structp png_ptr, |
|
794 png_infop info_ptr, png_uint_32 length)); |
|
795 PNG_EXTERN void png_push_read_iTXt PNGARG((png_structp png_ptr, |
|
796 png_infop info_ptr)); |
|
797 #endif |
|
798 |
|
799 #endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ |
|
800 |
|
801 #ifdef PNG_MNG_FEATURES_SUPPORTED |
|
802 PNG_EXTERN void png_do_read_intrapixel PNGARG((png_row_infop row_info, |
|
803 png_bytep row)); |
|
804 PNG_EXTERN void png_do_write_intrapixel PNGARG((png_row_infop row_info, |
|
805 png_bytep row)); |
|
806 #endif |
|
807 |
|
808 /* Added at libpng version 1.4.0 */ |
|
809 #ifdef PNG_cHRM_SUPPORTED |
|
810 PNG_EXTERN int png_check_cHRM_fixed PNGARG((png_structp png_ptr, |
|
811 png_fixed_point int_white_x, png_fixed_point int_white_y, |
|
812 png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point |
|
813 int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x, |
|
814 png_fixed_point int_blue_y)); |
|
815 #endif |
|
816 |
|
817 #ifdef PNG_cHRM_SUPPORTED |
|
818 #ifdef PNG_CHECK_cHRM_SUPPORTED |
|
819 /* Added at libpng version 1.2.34 and 1.4.0 */ |
|
820 PNG_EXTERN void png_64bit_product PNGARG((long v1, long v2, |
|
821 unsigned long *hi_product, unsigned long *lo_product)); |
|
822 #endif |
|
823 #endif |
|
824 |
|
825 /* Added at libpng version 1.4.0 */ |
|
826 PNG_EXTERN void png_check_IHDR PNGARG((png_structp png_ptr, |
|
827 png_uint_32 width, png_uint_32 height, int bit_depth, |
|
828 int color_type, int interlace_type, int compression_type, |
|
829 int filter_type)); |
|
830 |
|
831 /* Free all memory used by the read (old method - NOT DLL EXPORTED) */ |
|
832 extern void png_read_destroy PNGARG((png_structp png_ptr, png_infop info_ptr, |
|
833 png_infop end_info_ptr)); |
|
834 |
|
835 /* Free any memory used in png_ptr struct (old method - NOT DLL EXPORTED) */ |
|
836 extern void png_write_destroy PNGARG((png_structp png_ptr)); |
|
837 |
|
838 #ifdef USE_FAR_KEYWORD /* memory model conversion function */ |
|
839 extern void *png_far_to_near PNGARG((png_structp png_ptr,png_voidp ptr, |
|
840 int check)); |
|
841 #endif /* USE_FAR_KEYWORD */ |
|
842 |
|
843 /* Define PNG_DEBUG at compile time for debugging information. Higher |
|
844 * numbers for PNG_DEBUG mean more debugging information. This has |
|
845 * only been added since version 0.95 so it is not implemented throughout |
|
846 * libpng yet, but more support will be added as needed. |
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847 */ |
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848 #ifdef PNG_DEBUG |
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849 #if (PNG_DEBUG > 0) |
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850 #if !defined(PNG_DEBUG_FILE) && defined(_MSC_VER) |
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851 #include <crtdbg.h> |
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852 #if (PNG_DEBUG > 1) |
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853 #ifndef _DEBUG |
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854 # define _DEBUG |
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855 #endif |
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856 #ifndef png_debug |
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857 #define png_debug(l,m) _RPT0(_CRT_WARN,m PNG_STRING_NEWLINE) |
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858 #endif |
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859 #ifndef png_debug1 |
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860 #define png_debug1(l,m,p1) _RPT1(_CRT_WARN,m PNG_STRING_NEWLINE,p1) |
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861 #endif |
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862 #ifndef png_debug2 |
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863 #define png_debug2(l,m,p1,p2) _RPT2(_CRT_WARN,m PNG_STRING_NEWLINE,p1,p2) |
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864 #endif |
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865 #endif |
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866 #else /* PNG_DEBUG_FILE || !_MSC_VER */ |
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867 #ifndef PNG_DEBUG_FILE |
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868 #define PNG_DEBUG_FILE stderr |
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869 #endif /* PNG_DEBUG_FILE */ |
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870 |
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871 #if (PNG_DEBUG > 1) |
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872 /* Note: ["%s"m PNG_STRING_NEWLINE] probably does not work on |
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873 * non-ISO compilers |
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874 */ |
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875 # ifdef __STDC__ |
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876 # ifndef png_debug |
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877 # define png_debug(l,m) \ |
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878 { \ |
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879 int num_tabs=l; \ |
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880 fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \ |
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881 (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":"")))); \ |
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882 } |
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883 # endif |
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884 # ifndef png_debug1 |
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885 # define png_debug1(l,m,p1) \ |
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886 { \ |
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887 int num_tabs=l; \ |
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888 fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \ |
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889 (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1); \ |
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890 } |
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891 # endif |
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892 # ifndef png_debug2 |
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893 # define png_debug2(l,m,p1,p2) \ |
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894 { \ |
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895 int num_tabs=l; \ |
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896 fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \ |
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897 (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1,p2); \ |
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898 } |
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899 # endif |
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900 # else /* __STDC __ */ |
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901 # ifndef png_debug |
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902 # define png_debug(l,m) \ |
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903 { \ |
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904 int num_tabs=l; \ |
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905 char format[256]; \ |
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906 snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \ |
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907 (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \ |
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908 m,PNG_STRING_NEWLINE); \ |
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909 fprintf(PNG_DEBUG_FILE,format); \ |
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910 } |
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911 # endif |
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912 # ifndef png_debug1 |
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913 # define png_debug1(l,m,p1) \ |
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914 { \ |
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915 int num_tabs=l; \ |
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916 char format[256]; \ |
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917 snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \ |
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918 (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \ |
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919 m,PNG_STRING_NEWLINE); \ |
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920 fprintf(PNG_DEBUG_FILE,format,p1); \ |
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921 } |
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922 # endif |
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923 # ifndef png_debug2 |
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924 # define png_debug2(l,m,p1,p2) \ |
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925 { \ |
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926 int num_tabs=l; \ |
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927 char format[256]; \ |
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928 snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \ |
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929 (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \ |
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930 m,PNG_STRING_NEWLINE); \ |
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931 fprintf(PNG_DEBUG_FILE,format,p1,p2); \ |
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932 } |
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933 # endif |
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934 # endif /* __STDC __ */ |
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935 #endif /* (PNG_DEBUG > 1) */ |
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936 |
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937 #endif /* _MSC_VER */ |
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938 #endif /* (PNG_DEBUG > 0) */ |
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939 #endif /* PNG_DEBUG */ |
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940 #ifndef png_debug |
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941 #define png_debug(l, m) |
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942 #endif |
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943 #ifndef png_debug1 |
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944 #define png_debug1(l, m, p1) |
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945 #endif |
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946 #ifndef png_debug2 |
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947 #define png_debug2(l, m, p1, p2) |
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948 #endif |
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949 |
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950 /* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */ |
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951 |
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952 #ifdef __cplusplus |
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953 } |
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954 #endif |
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955 |
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956 #endif /* PNG_VERSION_INFO_ONLY */ |
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957 #endif /* PNGPRIV_H */ |