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2296
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1
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2 /* pngset.c - storage of image information into info struct
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3 *
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4 * Last changed in libpng 1.6.8 [December 19, 2013]
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5 * Copyright (c) 1998-2013 Glenn Randers-Pehrson
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6 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
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7 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
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8 *
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9 * This code is released under the libpng license.
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10 * For conditions of distribution and use, see the disclaimer
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11 * and license in png.h
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12 *
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13 * The functions here are used during reads to store data from the file
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14 * into the info struct, and during writes to store application data
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15 * into the info struct for writing into the file. This abstracts the
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16 * info struct and allows us to change the structure in the future.
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17 */
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18
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19 #include "pngpriv.h"
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20
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21 #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
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22
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23 #ifdef PNG_bKGD_SUPPORTED
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24 void PNGAPI
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25 png_set_bKGD(png_const_structrp png_ptr, png_inforp info_ptr,
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26 png_const_color_16p background)
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27 {
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28 png_debug1(1, "in %s storage function", "bKGD");
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29
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30 if (png_ptr == NULL || info_ptr == NULL || background == NULL)
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31 return;
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32
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33 info_ptr->background = *background;
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34 info_ptr->valid |= PNG_INFO_bKGD;
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35 }
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36 #endif
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37
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38 #ifdef PNG_cHRM_SUPPORTED
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39 void PNGFAPI
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40 png_set_cHRM_fixed(png_const_structrp png_ptr, png_inforp info_ptr,
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41 png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x,
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42 png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y,
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43 png_fixed_point blue_x, png_fixed_point blue_y)
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44 {
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45 png_xy xy;
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46
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47 png_debug1(1, "in %s storage function", "cHRM fixed");
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48
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49 if (png_ptr == NULL || info_ptr == NULL)
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50 return;
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51
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52 xy.redx = red_x;
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53 xy.redy = red_y;
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54 xy.greenx = green_x;
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55 xy.greeny = green_y;
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56 xy.bluex = blue_x;
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57 xy.bluey = blue_y;
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58 xy.whitex = white_x;
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59 xy.whitey = white_y;
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60
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61 if (png_colorspace_set_chromaticities(png_ptr, &info_ptr->colorspace, &xy,
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62 2/* override with app values*/))
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63 info_ptr->colorspace.flags |= PNG_COLORSPACE_FROM_cHRM;
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64
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65 png_colorspace_sync_info(png_ptr, info_ptr);
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66 }
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67
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68 void PNGFAPI
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69 png_set_cHRM_XYZ_fixed(png_const_structrp png_ptr, png_inforp info_ptr,
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70 png_fixed_point int_red_X, png_fixed_point int_red_Y,
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71 png_fixed_point int_red_Z, png_fixed_point int_green_X,
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72 png_fixed_point int_green_Y, png_fixed_point int_green_Z,
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73 png_fixed_point int_blue_X, png_fixed_point int_blue_Y,
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74 png_fixed_point int_blue_Z)
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75 {
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76 png_XYZ XYZ;
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77
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78 png_debug1(1, "in %s storage function", "cHRM XYZ fixed");
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79
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80 if (png_ptr == NULL || info_ptr == NULL)
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81 return;
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82
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83 XYZ.red_X = int_red_X;
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84 XYZ.red_Y = int_red_Y;
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85 XYZ.red_Z = int_red_Z;
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86 XYZ.green_X = int_green_X;
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87 XYZ.green_Y = int_green_Y;
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88 XYZ.green_Z = int_green_Z;
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89 XYZ.blue_X = int_blue_X;
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90 XYZ.blue_Y = int_blue_Y;
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91 XYZ.blue_Z = int_blue_Z;
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92
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93 if (png_colorspace_set_endpoints(png_ptr, &info_ptr->colorspace, &XYZ, 2))
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94 info_ptr->colorspace.flags |= PNG_COLORSPACE_FROM_cHRM;
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95
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96 png_colorspace_sync_info(png_ptr, info_ptr);
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97 }
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98
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99 # ifdef PNG_FLOATING_POINT_SUPPORTED
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100 void PNGAPI
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101 png_set_cHRM(png_const_structrp png_ptr, png_inforp info_ptr,
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102 double white_x, double white_y, double red_x, double red_y,
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103 double green_x, double green_y, double blue_x, double blue_y)
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104 {
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105 png_set_cHRM_fixed(png_ptr, info_ptr,
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106 png_fixed(png_ptr, white_x, "cHRM White X"),
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107 png_fixed(png_ptr, white_y, "cHRM White Y"),
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108 png_fixed(png_ptr, red_x, "cHRM Red X"),
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109 png_fixed(png_ptr, red_y, "cHRM Red Y"),
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110 png_fixed(png_ptr, green_x, "cHRM Green X"),
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111 png_fixed(png_ptr, green_y, "cHRM Green Y"),
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112 png_fixed(png_ptr, blue_x, "cHRM Blue X"),
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113 png_fixed(png_ptr, blue_y, "cHRM Blue Y"));
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114 }
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115
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116 void PNGAPI
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117 png_set_cHRM_XYZ(png_const_structrp png_ptr, png_inforp info_ptr, double red_X,
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118 double red_Y, double red_Z, double green_X, double green_Y, double green_Z,
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119 double blue_X, double blue_Y, double blue_Z)
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120 {
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121 png_set_cHRM_XYZ_fixed(png_ptr, info_ptr,
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122 png_fixed(png_ptr, red_X, "cHRM Red X"),
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123 png_fixed(png_ptr, red_Y, "cHRM Red Y"),
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124 png_fixed(png_ptr, red_Z, "cHRM Red Z"),
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125 png_fixed(png_ptr, green_X, "cHRM Red X"),
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126 png_fixed(png_ptr, green_Y, "cHRM Red Y"),
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127 png_fixed(png_ptr, green_Z, "cHRM Red Z"),
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128 png_fixed(png_ptr, blue_X, "cHRM Red X"),
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129 png_fixed(png_ptr, blue_Y, "cHRM Red Y"),
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130 png_fixed(png_ptr, blue_Z, "cHRM Red Z"));
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131 }
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132 # endif /* PNG_FLOATING_POINT_SUPPORTED */
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133
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134 #endif /* PNG_cHRM_SUPPORTED */
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135
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136 #ifdef PNG_gAMA_SUPPORTED
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137 void PNGFAPI
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138 png_set_gAMA_fixed(png_const_structrp png_ptr, png_inforp info_ptr,
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139 png_fixed_point file_gamma)
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140 {
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141 png_debug1(1, "in %s storage function", "gAMA");
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142
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143 if (png_ptr == NULL || info_ptr == NULL)
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144 return;
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145
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146 png_colorspace_set_gamma(png_ptr, &info_ptr->colorspace, file_gamma);
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147 png_colorspace_sync_info(png_ptr, info_ptr);
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148 }
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149
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150 # ifdef PNG_FLOATING_POINT_SUPPORTED
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151 void PNGAPI
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152 png_set_gAMA(png_const_structrp png_ptr, png_inforp info_ptr, double file_gamma)
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153 {
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154 png_set_gAMA_fixed(png_ptr, info_ptr, png_fixed(png_ptr, file_gamma,
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155 "png_set_gAMA"));
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156 }
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157 # endif
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158 #endif
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159
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160 #ifdef PNG_hIST_SUPPORTED
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161 void PNGAPI
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162 png_set_hIST(png_const_structrp png_ptr, png_inforp info_ptr,
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163 png_const_uint_16p hist)
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164 {
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165 int i;
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166
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167 png_debug1(1, "in %s storage function", "hIST");
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168
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169 if (png_ptr == NULL || info_ptr == NULL)
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170 return;
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171
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172 if (info_ptr->num_palette == 0 || info_ptr->num_palette
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173 > PNG_MAX_PALETTE_LENGTH)
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174 {
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175 png_warning(png_ptr,
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176 "Invalid palette size, hIST allocation skipped");
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177
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178 return;
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179 }
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180
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181 png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
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182
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183 /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in
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184 * version 1.2.1
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185 */
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186 info_ptr->hist = png_voidcast(png_uint_16p, png_malloc_warn(png_ptr,
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187 PNG_MAX_PALETTE_LENGTH * (sizeof (png_uint_16))));
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188
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189 if (info_ptr->hist == NULL)
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190 {
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191 png_warning(png_ptr, "Insufficient memory for hIST chunk data");
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192 return;
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193 }
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194
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195 info_ptr->free_me |= PNG_FREE_HIST;
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196
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197 for (i = 0; i < info_ptr->num_palette; i++)
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198 info_ptr->hist[i] = hist[i];
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199
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200 info_ptr->valid |= PNG_INFO_hIST;
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201 }
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202 #endif
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203
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204 void PNGAPI
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205 png_set_IHDR(png_const_structrp png_ptr, png_inforp info_ptr,
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206 png_uint_32 width, png_uint_32 height, int bit_depth,
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207 int color_type, int interlace_type, int compression_type,
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208 int filter_type)
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209 {
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210 png_debug1(1, "in %s storage function", "IHDR");
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211
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212 if (png_ptr == NULL || info_ptr == NULL)
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213 return;
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214
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215 info_ptr->width = width;
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216 info_ptr->height = height;
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217 info_ptr->bit_depth = (png_byte)bit_depth;
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218 info_ptr->color_type = (png_byte)color_type;
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219 info_ptr->compression_type = (png_byte)compression_type;
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220 info_ptr->filter_type = (png_byte)filter_type;
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221 info_ptr->interlace_type = (png_byte)interlace_type;
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222
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223 png_check_IHDR (png_ptr, info_ptr->width, info_ptr->height,
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224 info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type,
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225 info_ptr->compression_type, info_ptr->filter_type);
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226
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227 if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
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228 info_ptr->channels = 1;
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229
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230 else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
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231 info_ptr->channels = 3;
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232
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233 else
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234 info_ptr->channels = 1;
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235
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236 if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
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237 info_ptr->channels++;
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238
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239 info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
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240
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241 info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width);
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242 }
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243
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244 #ifdef PNG_oFFs_SUPPORTED
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245 void PNGAPI
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246 png_set_oFFs(png_const_structrp png_ptr, png_inforp info_ptr,
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247 png_int_32 offset_x, png_int_32 offset_y, int unit_type)
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248 {
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249 png_debug1(1, "in %s storage function", "oFFs");
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250
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251 if (png_ptr == NULL || info_ptr == NULL)
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252 return;
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253
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254 info_ptr->x_offset = offset_x;
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255 info_ptr->y_offset = offset_y;
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256 info_ptr->offset_unit_type = (png_byte)unit_type;
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257 info_ptr->valid |= PNG_INFO_oFFs;
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258 }
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259 #endif
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260
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261 #ifdef PNG_pCAL_SUPPORTED
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262 void PNGAPI
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263 png_set_pCAL(png_const_structrp png_ptr, png_inforp info_ptr,
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264 png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type,
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265 int nparams, png_const_charp units, png_charpp params)
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266 {
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267 png_size_t length;
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268 int i;
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269
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270 png_debug1(1, "in %s storage function", "pCAL");
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271
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272 if (png_ptr == NULL || info_ptr == NULL || purpose == NULL || units == NULL
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273 || (nparams > 0 && params == NULL))
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274 return;
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275
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276 length = strlen(purpose) + 1;
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277 png_debug1(3, "allocating purpose for info (%lu bytes)",
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278 (unsigned long)length);
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279
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280 /* TODO: validate format of calibration name and unit name */
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281
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282 /* Check that the type matches the specification. */
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283 if (type < 0 || type > 3)
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284 png_error(png_ptr, "Invalid pCAL equation type");
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285
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286 if (nparams < 0 || nparams > 255)
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287 png_error(png_ptr, "Invalid pCAL parameter count");
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288
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289 /* Validate params[nparams] */
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290 for (i=0; i<nparams; ++i)
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291 if (params[i] == NULL ||
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292 !png_check_fp_string(params[i], strlen(params[i])))
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293 png_error(png_ptr, "Invalid format for pCAL parameter");
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294
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295 info_ptr->pcal_purpose = png_voidcast(png_charp,
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296 png_malloc_warn(png_ptr, length));
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297
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298 if (info_ptr->pcal_purpose == NULL)
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299 {
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300 png_warning(png_ptr, "Insufficient memory for pCAL purpose");
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301 return;
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302 }
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303
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304 memcpy(info_ptr->pcal_purpose, purpose, length);
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305
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306 png_debug(3, "storing X0, X1, type, and nparams in info");
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307 info_ptr->pcal_X0 = X0;
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308 info_ptr->pcal_X1 = X1;
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309 info_ptr->pcal_type = (png_byte)type;
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310 info_ptr->pcal_nparams = (png_byte)nparams;
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311
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312 length = strlen(units) + 1;
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313 png_debug1(3, "allocating units for info (%lu bytes)",
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314 (unsigned long)length);
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315
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316 info_ptr->pcal_units = png_voidcast(png_charp,
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317 png_malloc_warn(png_ptr, length));
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318
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319 if (info_ptr->pcal_units == NULL)
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320 {
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321 png_warning(png_ptr, "Insufficient memory for pCAL units");
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322 return;
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323 }
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324
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325 memcpy(info_ptr->pcal_units, units, length);
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326
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327 info_ptr->pcal_params = png_voidcast(png_charpp, png_malloc_warn(png_ptr,
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328 (png_size_t)((nparams + 1) * (sizeof (png_charp)))));
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329
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330 if (info_ptr->pcal_params == NULL)
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331 {
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332 png_warning(png_ptr, "Insufficient memory for pCAL params");
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333 return;
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334 }
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335
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336 memset(info_ptr->pcal_params, 0, (nparams + 1) * (sizeof (png_charp)));
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337
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338 for (i = 0; i < nparams; i++)
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339 {
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340 length = strlen(params[i]) + 1;
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341 png_debug2(3, "allocating parameter %d for info (%lu bytes)", i,
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342 (unsigned long)length);
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343
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344 info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length);
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345
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346 if (info_ptr->pcal_params[i] == NULL)
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347 {
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348 png_warning(png_ptr, "Insufficient memory for pCAL parameter");
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349 return;
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350 }
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351
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352 memcpy(info_ptr->pcal_params[i], params[i], length);
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353 }
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354
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355 info_ptr->valid |= PNG_INFO_pCAL;
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356 info_ptr->free_me |= PNG_FREE_PCAL;
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357 }
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358 #endif
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359
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360 #ifdef PNG_sCAL_SUPPORTED
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361 void PNGAPI
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362 png_set_sCAL_s(png_const_structrp png_ptr, png_inforp info_ptr,
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363 int unit, png_const_charp swidth, png_const_charp sheight)
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364 {
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365 png_size_t lengthw = 0, lengthh = 0;
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366
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367 png_debug1(1, "in %s storage function", "sCAL");
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368
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369 if (png_ptr == NULL || info_ptr == NULL)
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370 return;
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371
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372 /* Double check the unit (should never get here with an invalid
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373 * unit unless this is an API call.)
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374 */
|
|
|
375 if (unit != 1 && unit != 2)
|
|
|
376 png_error(png_ptr, "Invalid sCAL unit");
|
|
|
377
|
|
|
378 if (swidth == NULL || (lengthw = strlen(swidth)) == 0 ||
|
|
|
379 swidth[0] == 45 /* '-' */ || !png_check_fp_string(swidth, lengthw))
|
|
|
380 png_error(png_ptr, "Invalid sCAL width");
|
|
|
381
|
|
|
382 if (sheight == NULL || (lengthh = strlen(sheight)) == 0 ||
|
|
|
383 sheight[0] == 45 /* '-' */ || !png_check_fp_string(sheight, lengthh))
|
|
|
384 png_error(png_ptr, "Invalid sCAL height");
|
|
|
385
|
|
|
386 info_ptr->scal_unit = (png_byte)unit;
|
|
|
387
|
|
|
388 ++lengthw;
|
|
|
389
|
|
|
390 png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthw);
|
|
|
391
|
|
|
392 info_ptr->scal_s_width = png_voidcast(png_charp,
|
|
|
393 png_malloc_warn(png_ptr, lengthw));
|
|
|
394
|
|
|
395 if (info_ptr->scal_s_width == NULL)
|
|
|
396 {
|
|
|
397 png_warning(png_ptr, "Memory allocation failed while processing sCAL");
|
|
|
398 return;
|
|
|
399 }
|
|
|
400
|
|
|
401 memcpy(info_ptr->scal_s_width, swidth, lengthw);
|
|
|
402
|
|
|
403 ++lengthh;
|
|
|
404
|
|
|
405 png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthh);
|
|
|
406
|
|
|
407 info_ptr->scal_s_height = png_voidcast(png_charp,
|
|
|
408 png_malloc_warn(png_ptr, lengthh));
|
|
|
409
|
|
|
410 if (info_ptr->scal_s_height == NULL)
|
|
|
411 {
|
|
|
412 png_free (png_ptr, info_ptr->scal_s_width);
|
|
|
413 info_ptr->scal_s_width = NULL;
|
|
|
414
|
|
|
415 png_warning(png_ptr, "Memory allocation failed while processing sCAL");
|
|
|
416 return;
|
|
|
417 }
|
|
|
418
|
|
|
419 memcpy(info_ptr->scal_s_height, sheight, lengthh);
|
|
|
420
|
|
|
421 info_ptr->valid |= PNG_INFO_sCAL;
|
|
|
422 info_ptr->free_me |= PNG_FREE_SCAL;
|
|
|
423 }
|
|
|
424
|
|
|
425 # ifdef PNG_FLOATING_POINT_SUPPORTED
|
|
|
426 void PNGAPI
|
|
|
427 png_set_sCAL(png_const_structrp png_ptr, png_inforp info_ptr, int unit,
|
|
|
428 double width, double height)
|
|
|
429 {
|
|
|
430 png_debug1(1, "in %s storage function", "sCAL");
|
|
|
431
|
|
|
432 /* Check the arguments. */
|
|
|
433 if (width <= 0)
|
|
|
434 png_warning(png_ptr, "Invalid sCAL width ignored");
|
|
|
435
|
|
|
436 else if (height <= 0)
|
|
|
437 png_warning(png_ptr, "Invalid sCAL height ignored");
|
|
|
438
|
|
|
439 else
|
|
|
440 {
|
|
|
441 /* Convert 'width' and 'height' to ASCII. */
|
|
|
442 char swidth[PNG_sCAL_MAX_DIGITS+1];
|
|
|
443 char sheight[PNG_sCAL_MAX_DIGITS+1];
|
|
|
444
|
|
|
445 png_ascii_from_fp(png_ptr, swidth, (sizeof swidth), width,
|
|
|
446 PNG_sCAL_PRECISION);
|
|
|
447 png_ascii_from_fp(png_ptr, sheight, (sizeof sheight), height,
|
|
|
448 PNG_sCAL_PRECISION);
|
|
|
449
|
|
|
450 png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight);
|
|
|
451 }
|
|
|
452 }
|
|
|
453 # endif
|
|
|
454
|
|
|
455 # ifdef PNG_FIXED_POINT_SUPPORTED
|
|
|
456 void PNGAPI
|
|
|
457 png_set_sCAL_fixed(png_const_structrp png_ptr, png_inforp info_ptr, int unit,
|
|
|
458 png_fixed_point width, png_fixed_point height)
|
|
|
459 {
|
|
|
460 png_debug1(1, "in %s storage function", "sCAL");
|
|
|
461
|
|
|
462 /* Check the arguments. */
|
|
|
463 if (width <= 0)
|
|
|
464 png_warning(png_ptr, "Invalid sCAL width ignored");
|
|
|
465
|
|
|
466 else if (height <= 0)
|
|
|
467 png_warning(png_ptr, "Invalid sCAL height ignored");
|
|
|
468
|
|
|
469 else
|
|
|
470 {
|
|
|
471 /* Convert 'width' and 'height' to ASCII. */
|
|
|
472 char swidth[PNG_sCAL_MAX_DIGITS+1];
|
|
|
473 char sheight[PNG_sCAL_MAX_DIGITS+1];
|
|
|
474
|
|
|
475 png_ascii_from_fixed(png_ptr, swidth, (sizeof swidth), width);
|
|
|
476 png_ascii_from_fixed(png_ptr, sheight, (sizeof sheight), height);
|
|
|
477
|
|
|
478 png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight);
|
|
|
479 }
|
|
|
480 }
|
|
|
481 # endif
|
|
|
482 #endif
|
|
|
483
|
|
|
484 #ifdef PNG_pHYs_SUPPORTED
|
|
|
485 void PNGAPI
|
|
|
486 png_set_pHYs(png_const_structrp png_ptr, png_inforp info_ptr,
|
|
|
487 png_uint_32 res_x, png_uint_32 res_y, int unit_type)
|
|
|
488 {
|
|
|
489 png_debug1(1, "in %s storage function", "pHYs");
|
|
|
490
|
|
|
491 if (png_ptr == NULL || info_ptr == NULL)
|
|
|
492 return;
|
|
|
493
|
|
|
494 info_ptr->x_pixels_per_unit = res_x;
|
|
|
495 info_ptr->y_pixels_per_unit = res_y;
|
|
|
496 info_ptr->phys_unit_type = (png_byte)unit_type;
|
|
|
497 info_ptr->valid |= PNG_INFO_pHYs;
|
|
|
498 }
|
|
|
499 #endif
|
|
|
500
|
|
|
501 void PNGAPI
|
|
|
502 png_set_PLTE(png_structrp png_ptr, png_inforp info_ptr,
|
|
|
503 png_const_colorp palette, int num_palette)
|
|
|
504 {
|
|
|
505
|
|
|
506 png_debug1(1, "in %s storage function", "PLTE");
|
|
|
507
|
|
|
508 if (png_ptr == NULL || info_ptr == NULL)
|
|
|
509 return;
|
|
|
510
|
|
|
511 if (num_palette < 0 || num_palette > PNG_MAX_PALETTE_LENGTH)
|
|
|
512 {
|
|
|
513 if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
|
|
|
514 png_error(png_ptr, "Invalid palette length");
|
|
|
515
|
|
|
516 else
|
|
|
517 {
|
|
|
518 png_warning(png_ptr, "Invalid palette length");
|
|
|
519 return;
|
|
|
520 }
|
|
|
521 }
|
|
|
522
|
|
|
523 if ((num_palette > 0 && palette == NULL) ||
|
|
|
524 (num_palette == 0
|
|
|
525 # ifdef PNG_MNG_FEATURES_SUPPORTED
|
|
|
526 && (png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) == 0
|
|
|
527 # endif
|
|
|
528 ))
|
|
|
529 {
|
|
|
530 png_error(png_ptr, "Invalid palette");
|
|
|
531 return;
|
|
|
532 }
|
|
|
533
|
|
|
534 /* It may not actually be necessary to set png_ptr->palette here;
|
|
|
535 * we do it for backward compatibility with the way the png_handle_tRNS
|
|
|
536 * function used to do the allocation.
|
|
|
537 *
|
|
|
538 * 1.6.0: the above statement appears to be incorrect; something has to set
|
|
|
539 * the palette inside png_struct on read.
|
|
|
540 */
|
|
|
541 png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
|
|
|
542
|
|
|
543 /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead
|
|
|
544 * of num_palette entries, in case of an invalid PNG file that has
|
|
|
545 * too-large sample values.
|
|
|
546 */
|
|
|
547 png_ptr->palette = png_voidcast(png_colorp, png_calloc(png_ptr,
|
|
|
548 PNG_MAX_PALETTE_LENGTH * (sizeof (png_color))));
|
|
|
549
|
|
|
550 if (num_palette > 0)
|
|
|
551 memcpy(png_ptr->palette, palette, num_palette * (sizeof (png_color)));
|
|
|
552 info_ptr->palette = png_ptr->palette;
|
|
|
553 info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;
|
|
|
554
|
|
|
555 info_ptr->free_me |= PNG_FREE_PLTE;
|
|
|
556
|
|
|
557 info_ptr->valid |= PNG_INFO_PLTE;
|
|
|
558 }
|
|
|
559
|
|
|
560 #ifdef PNG_sBIT_SUPPORTED
|
|
|
561 void PNGAPI
|
|
|
562 png_set_sBIT(png_const_structrp png_ptr, png_inforp info_ptr,
|
|
|
563 png_const_color_8p sig_bit)
|
|
|
564 {
|
|
|
565 png_debug1(1, "in %s storage function", "sBIT");
|
|
|
566
|
|
|
567 if (png_ptr == NULL || info_ptr == NULL || sig_bit == NULL)
|
|
|
568 return;
|
|
|
569
|
|
|
570 info_ptr->sig_bit = *sig_bit;
|
|
|
571 info_ptr->valid |= PNG_INFO_sBIT;
|
|
|
572 }
|
|
|
573 #endif
|
|
|
574
|
|
|
575 #ifdef PNG_sRGB_SUPPORTED
|
|
|
576 void PNGAPI
|
|
|
577 png_set_sRGB(png_const_structrp png_ptr, png_inforp info_ptr, int srgb_intent)
|
|
|
578 {
|
|
|
579 png_debug1(1, "in %s storage function", "sRGB");
|
|
|
580
|
|
|
581 if (png_ptr == NULL || info_ptr == NULL)
|
|
|
582 return;
|
|
|
583
|
|
|
584 (void)png_colorspace_set_sRGB(png_ptr, &info_ptr->colorspace, srgb_intent);
|
|
|
585 png_colorspace_sync_info(png_ptr, info_ptr);
|
|
|
586 }
|
|
|
587
|
|
|
588 void PNGAPI
|
|
|
589 png_set_sRGB_gAMA_and_cHRM(png_const_structrp png_ptr, png_inforp info_ptr,
|
|
|
590 int srgb_intent)
|
|
|
591 {
|
|
|
592 png_debug1(1, "in %s storage function", "sRGB_gAMA_and_cHRM");
|
|
|
593
|
|
|
594 if (png_ptr == NULL || info_ptr == NULL)
|
|
|
595 return;
|
|
|
596
|
|
|
597 if (png_colorspace_set_sRGB(png_ptr, &info_ptr->colorspace, srgb_intent))
|
|
|
598 {
|
|
|
599 /* This causes the gAMA and cHRM to be written too */
|
|
|
600 info_ptr->colorspace.flags |=
|
|
|
601 PNG_COLORSPACE_FROM_gAMA|PNG_COLORSPACE_FROM_cHRM;
|
|
|
602 }
|
|
|
603
|
|
|
604 png_colorspace_sync_info(png_ptr, info_ptr);
|
|
|
605 }
|
|
|
606 #endif /* sRGB */
|
|
|
607
|
|
|
608
|
|
|
609 #ifdef PNG_iCCP_SUPPORTED
|
|
|
610 void PNGAPI
|
|
|
611 png_set_iCCP(png_const_structrp png_ptr, png_inforp info_ptr,
|
|
|
612 png_const_charp name, int compression_type,
|
|
|
613 png_const_bytep profile, png_uint_32 proflen)
|
|
|
614 {
|
|
|
615 png_charp new_iccp_name;
|
|
|
616 png_bytep new_iccp_profile;
|
|
|
617 png_size_t length;
|
|
|
618
|
|
|
619 png_debug1(1, "in %s storage function", "iCCP");
|
|
|
620
|
|
|
621 if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)
|
|
|
622 return;
|
|
|
623
|
|
|
624 if (compression_type != PNG_COMPRESSION_TYPE_BASE)
|
|
|
625 png_app_error(png_ptr, "Invalid iCCP compression method");
|
|
|
626
|
|
|
627 /* Set the colorspace first because this validates the profile; do not
|
|
|
628 * override previously set app cHRM or gAMA here (because likely as not the
|
|
|
629 * application knows better than libpng what the correct values are.) Pass
|
|
|
630 * the info_ptr color_type field to png_colorspace_set_ICC because in the
|
|
|
631 * write case it has not yet been stored in png_ptr.
|
|
|
632 */
|
|
|
633 {
|
|
|
634 int result = png_colorspace_set_ICC(png_ptr, &info_ptr->colorspace, name,
|
|
|
635 proflen, profile, info_ptr->color_type);
|
|
|
636
|
|
|
637 png_colorspace_sync_info(png_ptr, info_ptr);
|
|
|
638
|
|
|
639 /* Don't do any of the copying if the profile was bad, or inconsistent. */
|
|
|
640 if (!result)
|
|
|
641 return;
|
|
|
642
|
|
|
643 /* But do write the gAMA and cHRM chunks from the profile. */
|
|
|
644 info_ptr->colorspace.flags |=
|
|
|
645 PNG_COLORSPACE_FROM_gAMA|PNG_COLORSPACE_FROM_cHRM;
|
|
|
646 }
|
|
|
647
|
|
|
648 length = strlen(name)+1;
|
|
|
649 new_iccp_name = png_voidcast(png_charp, png_malloc_warn(png_ptr, length));
|
|
|
650
|
|
|
651 if (new_iccp_name == NULL)
|
|
|
652 {
|
|
|
653 png_benign_error(png_ptr, "Insufficient memory to process iCCP chunk");
|
|
|
654 return;
|
|
|
655 }
|
|
|
656
|
|
|
657 memcpy(new_iccp_name, name, length);
|
|
|
658 new_iccp_profile = png_voidcast(png_bytep,
|
|
|
659 png_malloc_warn(png_ptr, proflen));
|
|
|
660
|
|
|
661 if (new_iccp_profile == NULL)
|
|
|
662 {
|
|
|
663 png_free(png_ptr, new_iccp_name);
|
|
|
664 png_benign_error(png_ptr,
|
|
|
665 "Insufficient memory to process iCCP profile");
|
|
|
666 return;
|
|
|
667 }
|
|
|
668
|
|
|
669 memcpy(new_iccp_profile, profile, proflen);
|
|
|
670
|
|
|
671 png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0);
|
|
|
672
|
|
|
673 info_ptr->iccp_proflen = proflen;
|
|
|
674 info_ptr->iccp_name = new_iccp_name;
|
|
|
675 info_ptr->iccp_profile = new_iccp_profile;
|
|
|
676 info_ptr->free_me |= PNG_FREE_ICCP;
|
|
|
677 info_ptr->valid |= PNG_INFO_iCCP;
|
|
|
678 }
|
|
|
679 #endif
|
|
|
680
|
|
|
681 #ifdef PNG_TEXT_SUPPORTED
|
|
|
682 void PNGAPI
|
|
|
683 png_set_text(png_const_structrp png_ptr, png_inforp info_ptr,
|
|
|
684 png_const_textp text_ptr, int num_text)
|
|
|
685 {
|
|
|
686 int ret;
|
|
|
687 ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text);
|
|
|
688
|
|
|
689 if (ret)
|
|
|
690 png_error(png_ptr, "Insufficient memory to store text");
|
|
|
691 }
|
|
|
692
|
|
|
693 int /* PRIVATE */
|
|
|
694 png_set_text_2(png_const_structrp png_ptr, png_inforp info_ptr,
|
|
|
695 png_const_textp text_ptr, int num_text)
|
|
|
696 {
|
|
|
697 int i;
|
|
|
698
|
|
|
699 png_debug1(1, "in %lx storage function", png_ptr == NULL ? "unexpected" :
|
|
|
700 (unsigned long)png_ptr->chunk_name);
|
|
|
701
|
|
|
702 if (png_ptr == NULL || info_ptr == NULL || num_text <= 0 || text_ptr == NULL)
|
|
|
703 return(0);
|
|
|
704
|
|
|
705 /* Make sure we have enough space in the "text" array in info_struct
|
|
|
706 * to hold all of the incoming text_ptr objects. This compare can't overflow
|
|
|
707 * because max_text >= num_text (anyway, subtract of two positive integers
|
|
|
708 * can't overflow in any case.)
|
|
|
709 */
|
|
|
710 if (num_text > info_ptr->max_text - info_ptr->num_text)
|
|
|
711 {
|
|
|
712 int old_num_text = info_ptr->num_text;
|
|
|
713 int max_text;
|
|
|
714 png_textp new_text = NULL;
|
|
|
715
|
|
|
716 /* Calculate an appropriate max_text, checking for overflow. */
|
|
|
717 max_text = old_num_text;
|
|
|
718 if (num_text <= INT_MAX - max_text)
|
|
|
719 {
|
|
|
720 max_text += num_text;
|
|
|
721
|
|
|
722 /* Round up to a multiple of 8 */
|
|
|
723 if (max_text < INT_MAX-8)
|
|
|
724 max_text = (max_text + 8) & ~0x7;
|
|
|
725
|
|
|
726 else
|
|
|
727 max_text = INT_MAX;
|
|
|
728
|
|
|
729 /* Now allocate a new array and copy the old members in, this does all
|
|
|
730 * the overflow checks.
|
|
|
731 */
|
|
|
732 new_text = png_voidcast(png_textp,png_realloc_array(png_ptr,
|
|
|
733 info_ptr->text, old_num_text, max_text-old_num_text,
|
|
|
734 sizeof *new_text));
|
|
|
735 }
|
|
|
736
|
|
|
737 if (new_text == NULL)
|
|
|
738 {
|
|
|
739 png_chunk_report(png_ptr, "too many text chunks",
|
|
|
740 PNG_CHUNK_WRITE_ERROR);
|
|
|
741 return 1;
|
|
|
742 }
|
|
|
743
|
|
|
744 png_free(png_ptr, info_ptr->text);
|
|
|
745
|
|
|
746 info_ptr->text = new_text;
|
|
|
747 info_ptr->free_me |= PNG_FREE_TEXT;
|
|
|
748 info_ptr->max_text = max_text;
|
|
|
749 /* num_text is adjusted below as the entries are copied in */
|
|
|
750
|
|
|
751 png_debug1(3, "allocated %d entries for info_ptr->text", max_text);
|
|
|
752 }
|
|
|
753
|
|
|
754 for (i = 0; i < num_text; i++)
|
|
|
755 {
|
|
|
756 size_t text_length, key_len;
|
|
|
757 size_t lang_len, lang_key_len;
|
|
|
758 png_textp textp = &(info_ptr->text[info_ptr->num_text]);
|
|
|
759
|
|
|
760 if (text_ptr[i].key == NULL)
|
|
|
761 continue;
|
|
|
762
|
|
|
763 if (text_ptr[i].compression < PNG_TEXT_COMPRESSION_NONE ||
|
|
|
764 text_ptr[i].compression >= PNG_TEXT_COMPRESSION_LAST)
|
|
|
765 {
|
|
|
766 png_chunk_report(png_ptr, "text compression mode is out of range",
|
|
|
767 PNG_CHUNK_WRITE_ERROR);
|
|
|
768 continue;
|
|
|
769 }
|
|
|
770
|
|
|
771 key_len = strlen(text_ptr[i].key);
|
|
|
772
|
|
|
773 if (text_ptr[i].compression <= 0)
|
|
|
774 {
|
|
|
775 lang_len = 0;
|
|
|
776 lang_key_len = 0;
|
|
|
777 }
|
|
|
778
|
|
|
779 else
|
|
|
780 # ifdef PNG_iTXt_SUPPORTED
|
|
|
781 {
|
|
|
782 /* Set iTXt data */
|
|
|
783
|
|
|
784 if (text_ptr[i].lang != NULL)
|
|
|
785 lang_len = strlen(text_ptr[i].lang);
|
|
|
786
|
|
|
787 else
|
|
|
788 lang_len = 0;
|
|
|
789
|
|
|
790 if (text_ptr[i].lang_key != NULL)
|
|
|
791 lang_key_len = strlen(text_ptr[i].lang_key);
|
|
|
792
|
|
|
793 else
|
|
|
794 lang_key_len = 0;
|
|
|
795 }
|
|
|
796 # else /* PNG_iTXt_SUPPORTED */
|
|
|
797 {
|
|
|
798 png_chunk_report(png_ptr, "iTXt chunk not supported",
|
|
|
799 PNG_CHUNK_WRITE_ERROR);
|
|
|
800 continue;
|
|
|
801 }
|
|
|
802 # endif
|
|
|
803
|
|
|
804 if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0')
|
|
|
805 {
|
|
|
806 text_length = 0;
|
|
|
807 # ifdef PNG_iTXt_SUPPORTED
|
|
|
808 if (text_ptr[i].compression > 0)
|
|
|
809 textp->compression = PNG_ITXT_COMPRESSION_NONE;
|
|
|
810
|
|
|
811 else
|
|
|
812 # endif
|
|
|
813 textp->compression = PNG_TEXT_COMPRESSION_NONE;
|
|
|
814 }
|
|
|
815
|
|
|
816 else
|
|
|
817 {
|
|
|
818 text_length = strlen(text_ptr[i].text);
|
|
|
819 textp->compression = text_ptr[i].compression;
|
|
|
820 }
|
|
|
821
|
|
|
822 textp->key = png_voidcast(png_charp,png_malloc_base(png_ptr,
|
|
|
823 key_len + text_length + lang_len + lang_key_len + 4));
|
|
|
824
|
|
|
825 if (textp->key == NULL)
|
|
|
826 {
|
|
|
827 png_chunk_report(png_ptr, "text chunk: out of memory",
|
|
|
828 PNG_CHUNK_WRITE_ERROR);
|
|
|
829 return 1;
|
|
|
830 }
|
|
|
831
|
|
|
832 png_debug2(2, "Allocated %lu bytes at %p in png_set_text",
|
|
|
833 (unsigned long)(png_uint_32)
|
|
|
834 (key_len + lang_len + lang_key_len + text_length + 4),
|
|
|
835 textp->key);
|
|
|
836
|
|
|
837 memcpy(textp->key, text_ptr[i].key, key_len);
|
|
|
838 *(textp->key + key_len) = '\0';
|
|
|
839
|
|
|
840 if (text_ptr[i].compression > 0)
|
|
|
841 {
|
|
|
842 textp->lang = textp->key + key_len + 1;
|
|
|
843 memcpy(textp->lang, text_ptr[i].lang, lang_len);
|
|
|
844 *(textp->lang + lang_len) = '\0';
|
|
|
845 textp->lang_key = textp->lang + lang_len + 1;
|
|
|
846 memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len);
|
|
|
847 *(textp->lang_key + lang_key_len) = '\0';
|
|
|
848 textp->text = textp->lang_key + lang_key_len + 1;
|
|
|
849 }
|
|
|
850
|
|
|
851 else
|
|
|
852 {
|
|
|
853 textp->lang=NULL;
|
|
|
854 textp->lang_key=NULL;
|
|
|
855 textp->text = textp->key + key_len + 1;
|
|
|
856 }
|
|
|
857
|
|
|
858 if (text_length)
|
|
|
859 memcpy(textp->text, text_ptr[i].text, text_length);
|
|
|
860
|
|
|
861 *(textp->text + text_length) = '\0';
|
|
|
862
|
|
|
863 # ifdef PNG_iTXt_SUPPORTED
|
|
|
864 if (textp->compression > 0)
|
|
|
865 {
|
|
|
866 textp->text_length = 0;
|
|
|
867 textp->itxt_length = text_length;
|
|
|
868 }
|
|
|
869
|
|
|
870 else
|
|
|
871 # endif
|
|
|
872 {
|
|
|
873 textp->text_length = text_length;
|
|
|
874 textp->itxt_length = 0;
|
|
|
875 }
|
|
|
876
|
|
|
877 info_ptr->num_text++;
|
|
|
878 png_debug1(3, "transferred text chunk %d", info_ptr->num_text);
|
|
|
879 }
|
|
|
880
|
|
|
881 return(0);
|
|
|
882 }
|
|
|
883 #endif
|
|
|
884
|
|
|
885 #ifdef PNG_tIME_SUPPORTED
|
|
|
886 void PNGAPI
|
|
|
887 png_set_tIME(png_const_structrp png_ptr, png_inforp info_ptr,
|
|
|
888 png_const_timep mod_time)
|
|
|
889 {
|
|
|
890 png_debug1(1, "in %s storage function", "tIME");
|
|
|
891
|
|
|
892 if (png_ptr == NULL || info_ptr == NULL || mod_time == NULL ||
|
|
|
893 (png_ptr->mode & PNG_WROTE_tIME))
|
|
|
894 return;
|
|
|
895
|
|
|
896 if (mod_time->month == 0 || mod_time->month > 12 ||
|
|
|
897 mod_time->day == 0 || mod_time->day > 31 ||
|
|
|
898 mod_time->hour > 23 || mod_time->minute > 59 ||
|
|
|
899 mod_time->second > 60)
|
|
|
900 {
|
|
|
901 png_warning(png_ptr, "Ignoring invalid time value");
|
|
|
902 return;
|
|
|
903 }
|
|
|
904
|
|
|
905 info_ptr->mod_time = *mod_time;
|
|
|
906 info_ptr->valid |= PNG_INFO_tIME;
|
|
|
907 }
|
|
|
908 #endif
|
|
|
909
|
|
|
910 #ifdef PNG_tRNS_SUPPORTED
|
|
|
911 void PNGAPI
|
|
|
912 png_set_tRNS(png_structrp png_ptr, png_inforp info_ptr,
|
|
|
913 png_const_bytep trans_alpha, int num_trans, png_const_color_16p trans_color)
|
|
|
914 {
|
|
|
915 png_debug1(1, "in %s storage function", "tRNS");
|
|
|
916
|
|
|
917 if (png_ptr == NULL || info_ptr == NULL)
|
|
|
918 return;
|
|
|
919
|
|
|
920 if (trans_alpha != NULL)
|
|
|
921 {
|
|
|
922 /* It may not actually be necessary to set png_ptr->trans_alpha here;
|
|
|
923 * we do it for backward compatibility with the way the png_handle_tRNS
|
|
|
924 * function used to do the allocation.
|
|
|
925 *
|
|
|
926 * 1.6.0: The above statement is incorrect; png_handle_tRNS effectively
|
|
|
927 * relies on png_set_tRNS storing the information in png_struct
|
|
|
928 * (otherwise it won't be there for the code in pngrtran.c).
|
|
|
929 */
|
|
|
930
|
|
|
931 png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
|
|
|
932
|
|
|
933 /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */
|
|
|
934 png_ptr->trans_alpha = info_ptr->trans_alpha = png_voidcast(png_bytep,
|
|
|
935 png_malloc(png_ptr, PNG_MAX_PALETTE_LENGTH));
|
|
|
936
|
|
|
937 if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH)
|
|
|
938 memcpy(info_ptr->trans_alpha, trans_alpha, (png_size_t)num_trans);
|
|
|
939 }
|
|
|
940
|
|
|
941 if (trans_color != NULL)
|
|
|
942 {
|
|
|
943 int sample_max = (1 << info_ptr->bit_depth);
|
|
|
944
|
|
|
945 if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY &&
|
|
|
946 trans_color->gray > sample_max) ||
|
|
|
947 (info_ptr->color_type == PNG_COLOR_TYPE_RGB &&
|
|
|
948 (trans_color->red > sample_max ||
|
|
|
949 trans_color->green > sample_max ||
|
|
|
950 trans_color->blue > sample_max)))
|
|
|
951 png_warning(png_ptr,
|
|
|
952 "tRNS chunk has out-of-range samples for bit_depth");
|
|
|
953
|
|
|
954 info_ptr->trans_color = *trans_color;
|
|
|
955
|
|
|
956 if (num_trans == 0)
|
|
|
957 num_trans = 1;
|
|
|
958 }
|
|
|
959
|
|
|
960 info_ptr->num_trans = (png_uint_16)num_trans;
|
|
|
961
|
|
|
962 if (num_trans != 0)
|
|
|
963 {
|
|
|
964 info_ptr->valid |= PNG_INFO_tRNS;
|
|
|
965 info_ptr->free_me |= PNG_FREE_TRNS;
|
|
|
966 }
|
|
|
967 }
|
|
|
968 #endif
|
|
|
969
|
|
|
970 #ifdef PNG_sPLT_SUPPORTED
|
|
|
971 void PNGAPI
|
|
|
972 png_set_sPLT(png_const_structrp png_ptr,
|
|
|
973 png_inforp info_ptr, png_const_sPLT_tp entries, int nentries)
|
|
|
974 /*
|
|
|
975 * entries - array of png_sPLT_t structures
|
|
|
976 * to be added to the list of palettes
|
|
|
977 * in the info structure.
|
|
|
978 *
|
|
|
979 * nentries - number of palette structures to be
|
|
|
980 * added.
|
|
|
981 */
|
|
|
982 {
|
|
|
983 png_sPLT_tp np;
|
|
|
984
|
|
|
985 if (png_ptr == NULL || info_ptr == NULL || nentries <= 0 || entries == NULL)
|
|
|
986 return;
|
|
|
987
|
|
|
988 /* Use the internal realloc function, which checks for all the possible
|
|
|
989 * overflows. Notice that the parameters are (int) and (size_t)
|
|
|
990 */
|
|
|
991 np = png_voidcast(png_sPLT_tp,png_realloc_array(png_ptr,
|
|
|
992 info_ptr->splt_palettes, info_ptr->splt_palettes_num, nentries,
|
|
|
993 sizeof *np));
|
|
|
994
|
|
|
995 if (np == NULL)
|
|
|
996 {
|
|
|
997 /* Out of memory or too many chunks */
|
|
|
998 png_chunk_report(png_ptr, "too many sPLT chunks", PNG_CHUNK_WRITE_ERROR);
|
|
|
999 return;
|
|
|
1000 }
|
|
|
1001
|
|
|
1002 png_free(png_ptr, info_ptr->splt_palettes);
|
|
|
1003 info_ptr->splt_palettes = np;
|
|
|
1004 info_ptr->free_me |= PNG_FREE_SPLT;
|
|
|
1005
|
|
|
1006 np += info_ptr->splt_palettes_num;
|
|
|
1007
|
|
|
1008 do
|
|
|
1009 {
|
|
|
1010 png_size_t length;
|
|
|
1011
|
|
|
1012 /* Skip invalid input entries */
|
|
|
1013 if (entries->name == NULL || entries->entries == NULL)
|
|
|
1014 {
|
|
|
1015 /* png_handle_sPLT doesn't do this, so this is an app error */
|
|
|
1016 png_app_error(png_ptr, "png_set_sPLT: invalid sPLT");
|
|
|
1017 /* Just skip the invalid entry */
|
|
|
1018 continue;
|
|
|
1019 }
|
|
|
1020
|
|
|
1021 np->depth = entries->depth;
|
|
|
1022
|
|
|
1023 /* In the even of out-of-memory just return - there's no point keeping on
|
|
|
1024 * trying to add sPLT chunks.
|
|
|
1025 */
|
|
|
1026 length = strlen(entries->name) + 1;
|
|
|
1027 np->name = png_voidcast(png_charp, png_malloc_base(png_ptr, length));
|
|
|
1028
|
|
|
1029 if (np->name == NULL)
|
|
|
1030 break;
|
|
|
1031
|
|
|
1032 memcpy(np->name, entries->name, length);
|
|
|
1033
|
|
|
1034 /* IMPORTANT: we have memory now that won't get freed if something else
|
|
|
1035 * goes wrong, this code must free it. png_malloc_array produces no
|
|
|
1036 * warnings, use a png_chunk_report (below) if there is an error.
|
|
|
1037 */
|
|
|
1038 np->entries = png_voidcast(png_sPLT_entryp, png_malloc_array(png_ptr,
|
|
|
1039 entries->nentries, sizeof (png_sPLT_entry)));
|
|
|
1040
|
|
|
1041 if (np->entries == NULL)
|
|
|
1042 {
|
|
|
1043 png_free(png_ptr, np->name);
|
|
|
1044 break;
|
|
|
1045 }
|
|
|
1046
|
|
|
1047 np->nentries = entries->nentries;
|
|
|
1048 /* This multiply can't overflow because png_malloc_array has already
|
|
|
1049 * checked it when doing the allocation.
|
|
|
1050 */
|
|
|
1051 memcpy(np->entries, entries->entries,
|
|
|
1052 entries->nentries * sizeof (png_sPLT_entry));
|
|
|
1053
|
|
|
1054 /* Note that 'continue' skips the advance of the out pointer and out
|
|
|
1055 * count, so an invalid entry is not added.
|
|
|
1056 */
|
|
|
1057 info_ptr->valid |= PNG_INFO_sPLT;
|
|
|
1058 ++(info_ptr->splt_palettes_num);
|
|
|
1059 ++np;
|
|
|
1060 }
|
|
|
1061 while (++entries, --nentries);
|
|
|
1062
|
|
|
1063 if (nentries > 0)
|
|
|
1064 png_chunk_report(png_ptr, "sPLT out of memory", PNG_CHUNK_WRITE_ERROR);
|
|
|
1065 }
|
|
|
1066 #endif /* PNG_sPLT_SUPPORTED */
|
|
|
1067
|
|
|
1068 #ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
|
|
|
1069 static png_byte
|
|
|
1070 check_location(png_const_structrp png_ptr, int location)
|
|
|
1071 {
|
|
|
1072 location &= (PNG_HAVE_IHDR|PNG_HAVE_PLTE|PNG_AFTER_IDAT);
|
|
|
1073
|
|
|
1074 /* New in 1.6.0; copy the location and check it. This is an API
|
|
|
1075 * change, previously the app had to use the
|
|
|
1076 * png_set_unknown_chunk_location API below for each chunk.
|
|
|
1077 */
|
|
|
1078 if (location == 0 && !(png_ptr->mode & PNG_IS_READ_STRUCT))
|
|
|
1079 {
|
|
|
1080 /* Write struct, so unknown chunks come from the app */
|
|
|
1081 png_app_warning(png_ptr,
|
|
|
1082 "png_set_unknown_chunks now expects a valid location");
|
|
|
1083 /* Use the old behavior */
|
|
|
1084 location = (png_byte)(png_ptr->mode &
|
|
|
1085 (PNG_HAVE_IHDR|PNG_HAVE_PLTE|PNG_AFTER_IDAT));
|
|
|
1086 }
|
|
|
1087
|
|
|
1088 /* This need not be an internal error - if the app calls
|
|
|
1089 * png_set_unknown_chunks on a read pointer it must get the location right.
|
|
|
1090 */
|
|
|
1091 if (location == 0)
|
|
|
1092 png_error(png_ptr, "invalid location in png_set_unknown_chunks");
|
|
|
1093
|
|
|
1094 /* Now reduce the location to the top-most set bit by removing each least
|
|
|
1095 * significant bit in turn.
|
|
|
1096 */
|
|
|
1097 while (location != (location & -location))
|
|
|
1098 location &= ~(location & -location);
|
|
|
1099
|
|
|
1100 /* The cast is safe because 'location' is a bit mask and only the low four
|
|
|
1101 * bits are significant.
|
|
|
1102 */
|
|
|
1103 return (png_byte)location;
|
|
|
1104 }
|
|
|
1105
|
|
|
1106 void PNGAPI
|
|
|
1107 png_set_unknown_chunks(png_const_structrp png_ptr,
|
|
|
1108 png_inforp info_ptr, png_const_unknown_chunkp unknowns, int num_unknowns)
|
|
|
1109 {
|
|
|
1110 png_unknown_chunkp np;
|
|
|
1111
|
|
|
1112 if (png_ptr == NULL || info_ptr == NULL || num_unknowns <= 0 ||
|
|
|
1113 unknowns == NULL)
|
|
|
1114 return;
|
|
|
1115
|
|
|
1116 /* Check for the failure cases where support has been disabled at compile
|
|
|
1117 * time. This code is hardly ever compiled - it's here because
|
|
|
1118 * STORE_UNKNOWN_CHUNKS is set by both read and write code (compiling in this
|
|
|
1119 * code) but may be meaningless if the read or write handling of unknown
|
|
|
1120 * chunks is not compiled in.
|
|
|
1121 */
|
|
|
1122 # if !defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) && \
|
|
|
1123 defined(PNG_READ_SUPPORTED)
|
|
|
1124 if (png_ptr->mode & PNG_IS_READ_STRUCT)
|
|
|
1125 {
|
|
|
1126 png_app_error(png_ptr, "no unknown chunk support on read");
|
|
|
1127 return;
|
|
|
1128 }
|
|
|
1129 # endif
|
|
|
1130 # if !defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED) && \
|
|
|
1131 defined(PNG_WRITE_SUPPORTED)
|
|
|
1132 if (!(png_ptr->mode & PNG_IS_READ_STRUCT))
|
|
|
1133 {
|
|
|
1134 png_app_error(png_ptr, "no unknown chunk support on write");
|
|
|
1135 return;
|
|
|
1136 }
|
|
|
1137 # endif
|
|
|
1138
|
|
|
1139 /* Prior to 1.6.0 this code used png_malloc_warn; however, this meant that
|
|
|
1140 * unknown critical chunks could be lost with just a warning resulting in
|
|
|
1141 * undefined behavior. Now png_chunk_report is used to provide behavior
|
|
|
1142 * appropriate to read or write.
|
|
|
1143 */
|
|
|
1144 np = png_voidcast(png_unknown_chunkp, png_realloc_array(png_ptr,
|
|
|
1145 info_ptr->unknown_chunks, info_ptr->unknown_chunks_num, num_unknowns,
|
|
|
1146 sizeof *np));
|
|
|
1147
|
|
|
1148 if (np == NULL)
|
|
|
1149 {
|
|
|
1150 png_chunk_report(png_ptr, "too many unknown chunks",
|
|
|
1151 PNG_CHUNK_WRITE_ERROR);
|
|
|
1152 return;
|
|
|
1153 }
|
|
|
1154
|
|
|
1155 png_free(png_ptr, info_ptr->unknown_chunks);
|
|
|
1156 info_ptr->unknown_chunks = np; /* safe because it is initialized */
|
|
|
1157 info_ptr->free_me |= PNG_FREE_UNKN;
|
|
|
1158
|
|
|
1159 np += info_ptr->unknown_chunks_num;
|
|
|
1160
|
|
|
1161 /* Increment unknown_chunks_num each time round the loop to protect the
|
|
|
1162 * just-allocated chunk data.
|
|
|
1163 */
|
|
|
1164 for (; num_unknowns > 0; --num_unknowns, ++unknowns)
|
|
|
1165 {
|
|
|
1166 memcpy(np->name, unknowns->name, (sizeof np->name));
|
|
|
1167 np->name[(sizeof np->name)-1] = '\0';
|
|
|
1168 np->location = check_location(png_ptr, unknowns->location);
|
|
|
1169
|
|
|
1170 if (unknowns->size == 0)
|
|
|
1171 {
|
|
|
1172 np->data = NULL;
|
|
|
1173 np->size = 0;
|
|
|
1174 }
|
|
|
1175
|
|
|
1176 else
|
|
|
1177 {
|
|
|
1178 np->data = png_voidcast(png_bytep,
|
|
|
1179 png_malloc_base(png_ptr, unknowns->size));
|
|
|
1180
|
|
|
1181 if (np->data == NULL)
|
|
|
1182 {
|
|
|
1183 png_chunk_report(png_ptr, "unknown chunk: out of memory",
|
|
|
1184 PNG_CHUNK_WRITE_ERROR);
|
|
|
1185 /* But just skip storing the unknown chunk */
|
|
|
1186 continue;
|
|
|
1187 }
|
|
|
1188
|
|
|
1189 memcpy(np->data, unknowns->data, unknowns->size);
|
|
|
1190 np->size = unknowns->size;
|
|
|
1191 }
|
|
|
1192
|
|
|
1193 /* These increments are skipped on out-of-memory for the data - the
|
|
|
1194 * unknown chunk entry gets overwritten if the png_chunk_report returns.
|
|
|
1195 * This is correct in the read case (the chunk is just dropped.)
|
|
|
1196 */
|
|
|
1197 ++np;
|
|
|
1198 ++(info_ptr->unknown_chunks_num);
|
|
|
1199 }
|
|
|
1200 }
|
|
|
1201
|
|
|
1202 void PNGAPI
|
|
|
1203 png_set_unknown_chunk_location(png_const_structrp png_ptr, png_inforp info_ptr,
|
|
|
1204 int chunk, int location)
|
|
|
1205 {
|
|
|
1206 /* This API is pretty pointless in 1.6.0 because the location can be set
|
|
|
1207 * before the call to png_set_unknown_chunks.
|
|
|
1208 *
|
|
|
1209 * TODO: add a png_app_warning in 1.7
|
|
|
1210 */
|
|
|
1211 if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 &&
|
|
|
1212 chunk < info_ptr->unknown_chunks_num)
|
|
|
1213 {
|
|
|
1214 if ((location & (PNG_HAVE_IHDR|PNG_HAVE_PLTE|PNG_AFTER_IDAT)) == 0)
|
|
|
1215 {
|
|
|
1216 png_app_error(png_ptr, "invalid unknown chunk location");
|
|
|
1217 /* Fake out the pre 1.6.0 behavior: */
|
|
|
1218 if ((location & PNG_HAVE_IDAT)) /* undocumented! */
|
|
|
1219 location = PNG_AFTER_IDAT;
|
|
|
1220
|
|
|
1221 else
|
|
|
1222 location = PNG_HAVE_IHDR; /* also undocumented */
|
|
|
1223 }
|
|
|
1224
|
|
|
1225 info_ptr->unknown_chunks[chunk].location =
|
|
|
1226 check_location(png_ptr, location);
|
|
|
1227 }
|
|
|
1228 }
|
|
|
1229 #endif
|
|
|
1230
|
|
|
1231
|
|
|
1232 #ifdef PNG_MNG_FEATURES_SUPPORTED
|
|
|
1233 png_uint_32 PNGAPI
|
|
|
1234 png_permit_mng_features (png_structrp png_ptr, png_uint_32 mng_features)
|
|
|
1235 {
|
|
|
1236 png_debug(1, "in png_permit_mng_features");
|
|
|
1237
|
|
|
1238 if (png_ptr == NULL)
|
|
|
1239 return 0;
|
|
|
1240
|
|
|
1241 png_ptr->mng_features_permitted = mng_features & PNG_ALL_MNG_FEATURES;
|
|
|
1242
|
|
|
1243 return png_ptr->mng_features_permitted;
|
|
|
1244 }
|
|
|
1245 #endif
|
|
|
1246
|
|
|
1247 #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
|
|
|
1248 static unsigned int
|
|
|
1249 add_one_chunk(png_bytep list, unsigned int count, png_const_bytep add, int keep)
|
|
|
1250 {
|
|
|
1251 unsigned int i;
|
|
|
1252
|
|
|
1253 /* Utility function: update the 'keep' state of a chunk if it is already in
|
|
|
1254 * the list, otherwise add it to the list.
|
|
|
1255 */
|
|
|
1256 for (i=0; i<count; ++i, list += 5) if (memcmp(list, add, 4) == 0)
|
|
|
1257 {
|
|
|
1258 list[4] = (png_byte)keep;
|
|
|
1259 return count;
|
|
|
1260 }
|
|
|
1261
|
|
|
1262 if (keep != PNG_HANDLE_CHUNK_AS_DEFAULT)
|
|
|
1263 {
|
|
|
1264 ++count;
|
|
|
1265 memcpy(list, add, 4);
|
|
|
1266 list[4] = (png_byte)keep;
|
|
|
1267 }
|
|
|
1268
|
|
|
1269 return count;
|
|
|
1270 }
|
|
|
1271
|
|
|
1272 void PNGAPI
|
|
|
1273 png_set_keep_unknown_chunks(png_structrp png_ptr, int keep,
|
|
|
1274 png_const_bytep chunk_list, int num_chunks_in)
|
|
|
1275 {
|
|
|
1276 png_bytep new_list;
|
|
|
1277 unsigned int num_chunks, old_num_chunks;
|
|
|
1278
|
|
|
1279 if (png_ptr == NULL)
|
|
|
1280 return;
|
|
|
1281
|
|
|
1282 if (keep < 0 || keep >= PNG_HANDLE_CHUNK_LAST)
|
|
|
1283 {
|
|
|
1284 png_app_error(png_ptr, "png_set_keep_unknown_chunks: invalid keep");
|
|
|
1285 return;
|
|
|
1286 }
|
|
|
1287
|
|
|
1288 if (num_chunks_in <= 0)
|
|
|
1289 {
|
|
|
1290 png_ptr->unknown_default = keep;
|
|
|
1291
|
|
|
1292 /* '0' means just set the flags, so stop here */
|
|
|
1293 if (num_chunks_in == 0)
|
|
|
1294 return;
|
|
|
1295 }
|
|
|
1296
|
|
|
1297 if (num_chunks_in < 0)
|
|
|
1298 {
|
|
|
1299 /* Ignore all unknown chunks and all chunks recognized by
|
|
|
1300 * libpng except for IHDR, PLTE, tRNS, IDAT, and IEND
|
|
|
1301 */
|
|
|
1302 static PNG_CONST png_byte chunks_to_ignore[] = {
|
|
|
1303 98, 75, 71, 68, '\0', /* bKGD */
|
|
|
1304 99, 72, 82, 77, '\0', /* cHRM */
|
|
|
1305 103, 65, 77, 65, '\0', /* gAMA */
|
|
|
1306 104, 73, 83, 84, '\0', /* hIST */
|
|
|
1307 105, 67, 67, 80, '\0', /* iCCP */
|
|
|
1308 105, 84, 88, 116, '\0', /* iTXt */
|
|
|
1309 111, 70, 70, 115, '\0', /* oFFs */
|
|
|
1310 112, 67, 65, 76, '\0', /* pCAL */
|
|
|
1311 112, 72, 89, 115, '\0', /* pHYs */
|
|
|
1312 115, 66, 73, 84, '\0', /* sBIT */
|
|
|
1313 115, 67, 65, 76, '\0', /* sCAL */
|
|
|
1314 115, 80, 76, 84, '\0', /* sPLT */
|
|
|
1315 115, 84, 69, 82, '\0', /* sTER */
|
|
|
1316 115, 82, 71, 66, '\0', /* sRGB */
|
|
|
1317 116, 69, 88, 116, '\0', /* tEXt */
|
|
|
1318 116, 73, 77, 69, '\0', /* tIME */
|
|
|
1319 122, 84, 88, 116, '\0' /* zTXt */
|
|
|
1320 };
|
|
|
1321
|
|
|
1322 chunk_list = chunks_to_ignore;
|
|
|
1323 num_chunks = (sizeof chunks_to_ignore)/5;
|
|
|
1324 }
|
|
|
1325
|
|
|
1326 else /* num_chunks_in > 0 */
|
|
|
1327 {
|
|
|
1328 if (chunk_list == NULL)
|
|
|
1329 {
|
|
|
1330 /* Prior to 1.6.0 this was silently ignored, now it is an app_error
|
|
|
1331 * which can be switched off.
|
|
|
1332 */
|
|
|
1333 png_app_error(png_ptr, "png_set_keep_unknown_chunks: no chunk list");
|
|
|
1334 return;
|
|
|
1335 }
|
|
|
1336
|
|
|
1337 num_chunks = num_chunks_in;
|
|
|
1338 }
|
|
|
1339
|
|
|
1340 old_num_chunks = png_ptr->num_chunk_list;
|
|
|
1341 if (png_ptr->chunk_list == NULL)
|
|
|
1342 old_num_chunks = 0;
|
|
|
1343
|
|
|
1344 /* Since num_chunks is always restricted to UINT_MAX/5 this can't overflow.
|
|
|
1345 */
|
|
|
1346 if (num_chunks + old_num_chunks > UINT_MAX/5)
|
|
|
1347 {
|
|
|
1348 png_app_error(png_ptr, "png_set_keep_unknown_chunks: too many chunks");
|
|
|
1349 return;
|
|
|
1350 }
|
|
|
1351
|
|
|
1352 /* If these chunks are being reset to the default then no more memory is
|
|
|
1353 * required because add_one_chunk above doesn't extend the list if the 'keep'
|
|
|
1354 * parameter is the default.
|
|
|
1355 */
|
|
|
1356 if (keep)
|
|
|
1357 {
|
|
|
1358 new_list = png_voidcast(png_bytep, png_malloc(png_ptr,
|
|
|
1359 5 * (num_chunks + old_num_chunks)));
|
|
|
1360
|
|
|
1361 if (old_num_chunks > 0)
|
|
|
1362 memcpy(new_list, png_ptr->chunk_list, 5*old_num_chunks);
|
|
|
1363 }
|
|
|
1364
|
|
|
1365 else if (old_num_chunks > 0)
|
|
|
1366 new_list = png_ptr->chunk_list;
|
|
|
1367
|
|
|
1368 else
|
|
|
1369 new_list = NULL;
|
|
|
1370
|
|
|
1371 /* Add the new chunks together with each one's handling code. If the chunk
|
|
|
1372 * already exists the code is updated, otherwise the chunk is added to the
|
|
|
1373 * end. (In libpng 1.6.0 order no longer matters because this code enforces
|
|
|
1374 * the earlier convention that the last setting is the one that is used.)
|
|
|
1375 */
|
|
|
1376 if (new_list != NULL)
|
|
|
1377 {
|
|
|
1378 png_const_bytep inlist;
|
|
|
1379 png_bytep outlist;
|
|
|
1380 unsigned int i;
|
|
|
1381
|
|
|
1382 for (i=0; i<num_chunks; ++i)
|
|
|
1383 old_num_chunks = add_one_chunk(new_list, old_num_chunks,
|
|
|
1384 chunk_list+5*i, keep);
|
|
|
1385
|
|
|
1386 /* Now remove any spurious 'default' entries. */
|
|
|
1387 num_chunks = 0;
|
|
|
1388 for (i=0, inlist=outlist=new_list; i<old_num_chunks; ++i, inlist += 5)
|
|
|
1389 if (inlist[4])
|
|
|
1390 {
|
|
|
1391 if (outlist != inlist)
|
|
|
1392 memcpy(outlist, inlist, 5);
|
|
|
1393 outlist += 5;
|
|
|
1394 ++num_chunks;
|
|
|
1395 }
|
|
|
1396
|
|
|
1397 /* This means the application has removed all the specialized handling. */
|
|
|
1398 if (num_chunks == 0)
|
|
|
1399 {
|
|
|
1400 if (png_ptr->chunk_list != new_list)
|
|
|
1401 png_free(png_ptr, new_list);
|
|
|
1402
|
|
|
1403 new_list = NULL;
|
|
|
1404 }
|
|
|
1405 }
|
|
|
1406
|
|
|
1407 else
|
|
|
1408 num_chunks = 0;
|
|
|
1409
|
|
|
1410 png_ptr->num_chunk_list = num_chunks;
|
|
|
1411
|
|
|
1412 if (png_ptr->chunk_list != new_list)
|
|
|
1413 {
|
|
|
1414 if (png_ptr->chunk_list != NULL)
|
|
|
1415 png_free(png_ptr, png_ptr->chunk_list);
|
|
|
1416
|
|
|
1417 png_ptr->chunk_list = new_list;
|
|
|
1418 }
|
|
|
1419 }
|
|
|
1420 #endif
|
|
|
1421
|
|
|
1422 #ifdef PNG_READ_USER_CHUNKS_SUPPORTED
|
|
|
1423 void PNGAPI
|
|
|
1424 png_set_read_user_chunk_fn(png_structrp png_ptr, png_voidp user_chunk_ptr,
|
|
|
1425 png_user_chunk_ptr read_user_chunk_fn)
|
|
|
1426 {
|
|
|
1427 png_debug(1, "in png_set_read_user_chunk_fn");
|
|
|
1428
|
|
|
1429 if (png_ptr == NULL)
|
|
|
1430 return;
|
|
|
1431
|
|
|
1432 png_ptr->read_user_chunk_fn = read_user_chunk_fn;
|
|
|
1433 png_ptr->user_chunk_ptr = user_chunk_ptr;
|
|
|
1434 }
|
|
|
1435 #endif
|
|
|
1436
|
|
|
1437 #ifdef PNG_INFO_IMAGE_SUPPORTED
|
|
|
1438 void PNGAPI
|
|
|
1439 png_set_rows(png_const_structrp png_ptr, png_inforp info_ptr,
|
|
|
1440 png_bytepp row_pointers)
|
|
|
1441 {
|
|
|
1442 png_debug1(1, "in %s storage function", "rows");
|
|
|
1443
|
|
|
1444 if (png_ptr == NULL || info_ptr == NULL)
|
|
|
1445 return;
|
|
|
1446
|
|
|
1447 if (info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers))
|
|
|
1448 png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
|
|
|
1449
|
|
|
1450 info_ptr->row_pointers = row_pointers;
|
|
|
1451
|
|
|
1452 if (row_pointers)
|
|
|
1453 info_ptr->valid |= PNG_INFO_IDAT;
|
|
|
1454 }
|
|
|
1455 #endif
|
|
|
1456
|
|
|
1457 void PNGAPI
|
|
|
1458 png_set_compression_buffer_size(png_structrp png_ptr, png_size_t size)
|
|
|
1459 {
|
|
|
1460 if (png_ptr == NULL)
|
|
|
1461 return;
|
|
|
1462
|
|
|
1463 if (size == 0 || size > PNG_UINT_31_MAX)
|
|
|
1464 png_error(png_ptr, "invalid compression buffer size");
|
|
|
1465
|
|
|
1466 # ifdef PNG_SEQUENTIAL_READ_SUPPORTED
|
|
|
1467 if (png_ptr->mode & PNG_IS_READ_STRUCT)
|
|
|
1468 {
|
|
|
1469 png_ptr->IDAT_read_size = (png_uint_32)size; /* checked above */
|
|
|
1470 return;
|
|
|
1471 }
|
|
|
1472 # endif
|
|
|
1473
|
|
|
1474 # ifdef PNG_WRITE_SUPPORTED
|
|
|
1475 if (!(png_ptr->mode & PNG_IS_READ_STRUCT))
|
|
|
1476 {
|
|
|
1477 if (png_ptr->zowner != 0)
|
|
|
1478 {
|
|
|
1479 png_warning(png_ptr,
|
|
|
1480 "Compression buffer size cannot be changed because it is in use");
|
|
|
1481 return;
|
|
|
1482 }
|
|
|
1483
|
|
|
1484 if (size > ZLIB_IO_MAX)
|
|
|
1485 {
|
|
|
1486 png_warning(png_ptr,
|
|
|
1487 "Compression buffer size limited to system maximum");
|
|
|
1488 size = ZLIB_IO_MAX; /* must fit */
|
|
|
1489 }
|
|
|
1490
|
|
|
1491 else if (size < 6)
|
|
|
1492 {
|
|
|
1493 /* Deflate will potentially go into an infinite loop on a SYNC_FLUSH
|
|
|
1494 * if this is permitted.
|
|
|
1495 */
|
|
|
1496 png_warning(png_ptr,
|
|
|
1497 "Compression buffer size cannot be reduced below 6");
|
|
|
1498 return;
|
|
|
1499 }
|
|
|
1500
|
|
|
1501 if (png_ptr->zbuffer_size != size)
|
|
|
1502 {
|
|
|
1503 png_free_buffer_list(png_ptr, &png_ptr->zbuffer_list);
|
|
|
1504 png_ptr->zbuffer_size = (uInt)size;
|
|
|
1505 }
|
|
|
1506 }
|
|
|
1507 # endif
|
|
|
1508 }
|
|
|
1509
|
|
|
1510 void PNGAPI
|
|
|
1511 png_set_invalid(png_const_structrp png_ptr, png_inforp info_ptr, int mask)
|
|
|
1512 {
|
|
|
1513 if (png_ptr && info_ptr)
|
|
|
1514 info_ptr->valid &= ~mask;
|
|
|
1515 }
|
|
|
1516
|
|
|
1517
|
|
|
1518 #ifdef PNG_SET_USER_LIMITS_SUPPORTED
|
|
|
1519 /* This function was added to libpng 1.2.6 */
|
|
|
1520 void PNGAPI
|
|
|
1521 png_set_user_limits (png_structrp png_ptr, png_uint_32 user_width_max,
|
|
|
1522 png_uint_32 user_height_max)
|
|
|
1523 {
|
|
|
1524 /* Images with dimensions larger than these limits will be
|
|
|
1525 * rejected by png_set_IHDR(). To accept any PNG datastream
|
|
|
1526 * regardless of dimensions, set both limits to 0x7ffffffL.
|
|
|
1527 */
|
|
|
1528 if (png_ptr == NULL)
|
|
|
1529 return;
|
|
|
1530
|
|
|
1531 png_ptr->user_width_max = user_width_max;
|
|
|
1532 png_ptr->user_height_max = user_height_max;
|
|
|
1533 }
|
|
|
1534
|
|
|
1535 /* This function was added to libpng 1.4.0 */
|
|
|
1536 void PNGAPI
|
|
|
1537 png_set_chunk_cache_max (png_structrp png_ptr, png_uint_32 user_chunk_cache_max)
|
|
|
1538 {
|
|
|
1539 if (png_ptr)
|
|
|
1540 png_ptr->user_chunk_cache_max = user_chunk_cache_max;
|
|
|
1541 }
|
|
|
1542
|
|
|
1543 /* This function was added to libpng 1.4.1 */
|
|
|
1544 void PNGAPI
|
|
|
1545 png_set_chunk_malloc_max (png_structrp png_ptr,
|
|
|
1546 png_alloc_size_t user_chunk_malloc_max)
|
|
|
1547 {
|
|
|
1548 if (png_ptr)
|
|
|
1549 png_ptr->user_chunk_malloc_max = user_chunk_malloc_max;
|
|
|
1550 }
|
|
|
1551 #endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
|
|
|
1552
|
|
|
1553
|
|
|
1554 #ifdef PNG_BENIGN_ERRORS_SUPPORTED
|
|
|
1555 void PNGAPI
|
|
|
1556 png_set_benign_errors(png_structrp png_ptr, int allowed)
|
|
|
1557 {
|
|
|
1558 png_debug(1, "in png_set_benign_errors");
|
|
|
1559
|
|
|
1560 /* If allowed is 1, png_benign_error() is treated as a warning.
|
|
|
1561 *
|
|
|
1562 * If allowed is 0, png_benign_error() is treated as an error (which
|
|
|
1563 * is the default behavior if png_set_benign_errors() is not called).
|
|
|
1564 */
|
|
|
1565
|
|
|
1566 if (allowed)
|
|
|
1567 png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN |
|
|
|
1568 PNG_FLAG_APP_WARNINGS_WARN | PNG_FLAG_APP_ERRORS_WARN;
|
|
|
1569
|
|
|
1570 else
|
|
|
1571 png_ptr->flags &= ~(PNG_FLAG_BENIGN_ERRORS_WARN |
|
|
|
1572 PNG_FLAG_APP_WARNINGS_WARN | PNG_FLAG_APP_ERRORS_WARN);
|
|
|
1573 }
|
|
|
1574 #endif /* PNG_BENIGN_ERRORS_SUPPORTED */
|
|
|
1575
|
|
|
1576 #ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED
|
|
|
1577 /* Whether to report invalid palette index; added at libng-1.5.10.
|
|
|
1578 * It is possible for an indexed (color-type==3) PNG file to contain
|
|
|
1579 * pixels with invalid (out-of-range) indexes if the PLTE chunk has
|
|
|
1580 * fewer entries than the image's bit-depth would allow. We recover
|
|
|
1581 * from this gracefully by filling any incomplete palette with zeroes
|
|
|
1582 * (opaque black). By default, when this occurs libpng will issue
|
|
|
1583 * a benign error. This API can be used to override that behavior.
|
|
|
1584 */
|
|
|
1585 void PNGAPI
|
|
|
1586 png_set_check_for_invalid_index(png_structrp png_ptr, int allowed)
|
|
|
1587 {
|
|
|
1588 png_debug(1, "in png_set_check_for_invalid_index");
|
|
|
1589
|
|
|
1590 if (allowed > 0)
|
|
|
1591 png_ptr->num_palette_max = 0;
|
|
|
1592
|
|
|
1593 else
|
|
|
1594 png_ptr->num_palette_max = -1;
|
|
|
1595 }
|
|
|
1596 #endif
|
|
|
1597 #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
|
