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Rev | Author | Line No. | Line |
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96 | giacomo | 1 | |
2 | /* pngset.c - storage of image information into info struct |
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3 | * |
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4 | * libpng 1.2.5 - October 3, 2002 |
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5 | * For conditions of distribution and use, see copyright notice in png.h |
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6 | * Copyright (c) 1998-2002 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 | * The functions here are used during reads to store data from the file |
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11 | * into the info struct, and during writes to store application data |
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12 | * into the info struct for writing into the file. This abstracts the |
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13 | * info struct and allows us to change the structure in the future. |
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14 | */ |
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15 | |||
16 | #define PNG_INTERNAL |
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17 | #include "png.h" |
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18 | |||
19 | #if defined(PNG_bKGD_SUPPORTED) |
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20 | void PNGAPI |
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21 | png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background) |
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22 | { |
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23 | png_debug1(1, "in %s storage function\n", "bKGD"); |
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24 | if (png_ptr == NULL || info_ptr == NULL) |
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25 | return; |
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26 | |||
27 | png_memcpy(&(info_ptr->background), background, sizeof(png_color_16)); |
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28 | info_ptr->valid |= PNG_INFO_bKGD; |
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29 | } |
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30 | #endif |
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31 | |||
32 | #if defined(PNG_cHRM_SUPPORTED) |
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33 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
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34 | void PNGAPI |
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35 | png_set_cHRM(png_structp png_ptr, png_infop info_ptr, |
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36 | double white_x, double white_y, double red_x, double red_y, |
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37 | double green_x, double green_y, double blue_x, double blue_y) |
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38 | { |
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39 | png_debug1(1, "in %s storage function\n", "cHRM"); |
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40 | if (png_ptr == NULL || info_ptr == NULL) |
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41 | return; |
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42 | |||
43 | if (white_x < 0.0 || white_y < 0.0 || |
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44 | red_x < 0.0 || red_y < 0.0 || |
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45 | green_x < 0.0 || green_y < 0.0 || |
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46 | blue_x < 0.0 || blue_y < 0.0) |
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47 | { |
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48 | png_warning(png_ptr, |
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49 | "Ignoring attempt to set negative chromaticity value"); |
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50 | return; |
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51 | } |
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52 | if (white_x > 21474.83 || white_y > 21474.83 || |
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53 | red_x > 21474.83 || red_y > 21474.83 || |
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54 | green_x > 21474.83 || green_y > 21474.83 || |
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55 | blue_x > 21474.83 || blue_y > 21474.83) |
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56 | { |
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57 | png_warning(png_ptr, |
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58 | "Ignoring attempt to set chromaticity value exceeding 21474.83"); |
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59 | return; |
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60 | } |
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61 | |||
62 | info_ptr->x_white = (float)white_x; |
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63 | info_ptr->y_white = (float)white_y; |
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64 | info_ptr->x_red = (float)red_x; |
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65 | info_ptr->y_red = (float)red_y; |
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66 | info_ptr->x_green = (float)green_x; |
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67 | info_ptr->y_green = (float)green_y; |
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68 | info_ptr->x_blue = (float)blue_x; |
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69 | info_ptr->y_blue = (float)blue_y; |
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70 | #ifdef PNG_FIXED_POINT_SUPPORTED |
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71 | info_ptr->int_x_white = (png_fixed_point)(white_x*100000.+0.5); |
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72 | info_ptr->int_y_white = (png_fixed_point)(white_y*100000.+0.5); |
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73 | info_ptr->int_x_red = (png_fixed_point)( red_x*100000.+0.5); |
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74 | info_ptr->int_y_red = (png_fixed_point)( red_y*100000.+0.5); |
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75 | info_ptr->int_x_green = (png_fixed_point)(green_x*100000.+0.5); |
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76 | info_ptr->int_y_green = (png_fixed_point)(green_y*100000.+0.5); |
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77 | info_ptr->int_x_blue = (png_fixed_point)( blue_x*100000.+0.5); |
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78 | info_ptr->int_y_blue = (png_fixed_point)( blue_y*100000.+0.5); |
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79 | #endif |
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80 | info_ptr->valid |= PNG_INFO_cHRM; |
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81 | } |
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82 | #endif |
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83 | #ifdef PNG_FIXED_POINT_SUPPORTED |
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84 | void PNGAPI |
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85 | png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr, |
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86 | png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x, |
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87 | png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y, |
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88 | png_fixed_point blue_x, png_fixed_point blue_y) |
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89 | { |
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90 | png_debug1(1, "in %s storage function\n", "cHRM"); |
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91 | if (png_ptr == NULL || info_ptr == NULL) |
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92 | return; |
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93 | |||
94 | if (white_x < 0 || white_y < 0 || |
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95 | red_x < 0 || red_y < 0 || |
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96 | green_x < 0 || green_y < 0 || |
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97 | blue_x < 0 || blue_y < 0) |
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98 | { |
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99 | png_warning(png_ptr, |
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100 | "Ignoring attempt to set negative chromaticity value"); |
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101 | return; |
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102 | } |
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103 | if (white_x > (double) PNG_MAX_UINT || white_y > (double) PNG_MAX_UINT || |
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104 | red_x > (double) PNG_MAX_UINT || red_y > (double) PNG_MAX_UINT || |
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105 | green_x > (double) PNG_MAX_UINT || green_y > (double) PNG_MAX_UINT || |
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106 | blue_x > (double) PNG_MAX_UINT || blue_y > (double) PNG_MAX_UINT) |
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107 | { |
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108 | png_warning(png_ptr, |
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109 | "Ignoring attempt to set chromaticity value exceeding 21474.83"); |
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110 | return; |
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111 | } |
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112 | info_ptr->int_x_white = white_x; |
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113 | info_ptr->int_y_white = white_y; |
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114 | info_ptr->int_x_red = red_x; |
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115 | info_ptr->int_y_red = red_y; |
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116 | info_ptr->int_x_green = green_x; |
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117 | info_ptr->int_y_green = green_y; |
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118 | info_ptr->int_x_blue = blue_x; |
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119 | info_ptr->int_y_blue = blue_y; |
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120 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
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121 | info_ptr->x_white = (float)(white_x/100000.); |
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122 | info_ptr->y_white = (float)(white_y/100000.); |
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123 | info_ptr->x_red = (float)( red_x/100000.); |
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124 | info_ptr->y_red = (float)( red_y/100000.); |
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125 | info_ptr->x_green = (float)(green_x/100000.); |
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126 | info_ptr->y_green = (float)(green_y/100000.); |
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127 | info_ptr->x_blue = (float)( blue_x/100000.); |
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128 | info_ptr->y_blue = (float)( blue_y/100000.); |
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129 | #endif |
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130 | info_ptr->valid |= PNG_INFO_cHRM; |
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131 | } |
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132 | #endif |
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133 | #endif |
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134 | |||
135 | #if defined(PNG_gAMA_SUPPORTED) |
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136 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
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137 | void PNGAPI |
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138 | png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma) |
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139 | { |
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140 | double gamma; |
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141 | png_debug1(1, "in %s storage function\n", "gAMA"); |
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142 | if (png_ptr == NULL || info_ptr == NULL) |
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143 | return; |
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144 | |||
145 | /* Check for overflow */ |
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146 | if (file_gamma > 21474.83) |
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147 | { |
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148 | png_warning(png_ptr, "Limiting gamma to 21474.83"); |
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149 | gamma=21474.83; |
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150 | } |
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151 | else |
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152 | gamma=file_gamma; |
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153 | info_ptr->gamma = (float)gamma; |
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154 | #ifdef PNG_FIXED_POINT_SUPPORTED |
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155 | info_ptr->int_gamma = (int)(gamma*100000.+.5); |
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156 | #endif |
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157 | info_ptr->valid |= PNG_INFO_gAMA; |
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158 | if(gamma == 0.0) |
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159 | png_warning(png_ptr, "Setting gamma=0"); |
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160 | } |
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161 | #endif |
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162 | void PNGAPI |
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163 | png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point |
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164 | int_gamma) |
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165 | { |
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166 | png_fixed_point gamma; |
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167 | |||
168 | png_debug1(1, "in %s storage function\n", "gAMA"); |
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169 | if (png_ptr == NULL || info_ptr == NULL) |
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170 | return; |
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171 | |||
172 | if (int_gamma > (png_fixed_point) PNG_MAX_UINT) |
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173 | { |
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174 | png_warning(png_ptr, "Limiting gamma to 21474.83"); |
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175 | gamma=PNG_MAX_UINT; |
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176 | } |
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177 | else |
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178 | { |
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179 | if (int_gamma < 0) |
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180 | { |
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181 | png_warning(png_ptr, "Setting negative gamma to zero"); |
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182 | gamma=0; |
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183 | } |
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184 | else |
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185 | gamma=int_gamma; |
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186 | } |
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187 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
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188 | info_ptr->gamma = (float)(gamma/100000.); |
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189 | #endif |
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190 | #ifdef PNG_FIXED_POINT_SUPPORTED |
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191 | info_ptr->int_gamma = gamma; |
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192 | #endif |
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193 | info_ptr->valid |= PNG_INFO_gAMA; |
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194 | if(gamma == 0) |
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195 | png_warning(png_ptr, "Setting gamma=0"); |
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196 | } |
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197 | #endif |
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198 | |||
199 | #if defined(PNG_hIST_SUPPORTED) |
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200 | void PNGAPI |
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201 | png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist) |
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202 | { |
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203 | int i; |
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204 | |||
205 | png_debug1(1, "in %s storage function\n", "hIST"); |
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206 | if (png_ptr == NULL || info_ptr == NULL) |
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207 | return; |
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208 | if (info_ptr->num_palette == 0) |
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209 | { |
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210 | png_warning(png_ptr, |
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211 | "Palette size 0, hIST allocation skipped."); |
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212 | return; |
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213 | } |
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214 | |||
215 | #ifdef PNG_FREE_ME_SUPPORTED |
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216 | png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0); |
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217 | #endif |
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218 | /* Changed from info->num_palette to 256 in version 1.2.1 */ |
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219 | png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr, |
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220 | (png_uint_32)(256 * sizeof (png_uint_16))); |
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221 | if (png_ptr->hist == NULL) |
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222 | { |
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223 | png_warning(png_ptr, "Insufficient memory for hIST chunk data."); |
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224 | return; |
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225 | } |
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226 | |||
227 | for (i = 0; i < info_ptr->num_palette; i++) |
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228 | png_ptr->hist[i] = hist[i]; |
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229 | info_ptr->hist = png_ptr->hist; |
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230 | info_ptr->valid |= PNG_INFO_hIST; |
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231 | |||
232 | #ifdef PNG_FREE_ME_SUPPORTED |
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233 | info_ptr->free_me |= PNG_FREE_HIST; |
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234 | #else |
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235 | png_ptr->flags |= PNG_FLAG_FREE_HIST; |
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236 | #endif |
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237 | } |
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238 | #endif |
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239 | |||
240 | void PNGAPI |
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241 | png_set_IHDR(png_structp png_ptr, png_infop info_ptr, |
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242 | png_uint_32 width, png_uint_32 height, int bit_depth, |
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243 | int color_type, int interlace_type, int compression_type, |
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244 | int filter_type) |
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245 | { |
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246 | int rowbytes_per_pixel; |
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247 | png_debug1(1, "in %s storage function\n", "IHDR"); |
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248 | if (png_ptr == NULL || info_ptr == NULL) |
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249 | return; |
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250 | |||
251 | /* check for width and height valid values */ |
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252 | if (width == 0 || height == 0) |
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253 | png_error(png_ptr, "Image width or height is zero in IHDR"); |
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254 | if (width > PNG_MAX_UINT || height > PNG_MAX_UINT) |
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255 | png_error(png_ptr, "Invalid image size in IHDR"); |
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256 | |||
257 | /* check other values */ |
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258 | if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 && |
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259 | bit_depth != 8 && bit_depth != 16) |
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260 | png_error(png_ptr, "Invalid bit depth in IHDR"); |
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261 | |||
262 | if (color_type < 0 || color_type == 1 || |
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263 | color_type == 5 || color_type > 6) |
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264 | png_error(png_ptr, "Invalid color type in IHDR"); |
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265 | |||
266 | if (((color_type == PNG_COLOR_TYPE_PALETTE) && bit_depth > 8) || |
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267 | ((color_type == PNG_COLOR_TYPE_RGB || |
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268 | color_type == PNG_COLOR_TYPE_GRAY_ALPHA || |
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269 | color_type == PNG_COLOR_TYPE_RGB_ALPHA) && bit_depth < 8)) |
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270 | png_error(png_ptr, "Invalid color type/bit depth combination in IHDR"); |
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271 | |||
272 | if (interlace_type >= PNG_INTERLACE_LAST) |
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273 | png_error(png_ptr, "Unknown interlace method in IHDR"); |
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274 | |||
275 | if (compression_type != PNG_COMPRESSION_TYPE_BASE) |
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276 | png_error(png_ptr, "Unknown compression method in IHDR"); |
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277 | |||
278 | #if defined(PNG_MNG_FEATURES_SUPPORTED) |
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279 | /* Accept filter_method 64 (intrapixel differencing) only if |
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280 | * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and |
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281 | * 2. Libpng did not read a PNG signature (this filter_method is only |
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282 | * used in PNG datastreams that are embedded in MNG datastreams) and |
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283 | * 3. The application called png_permit_mng_features with a mask that |
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284 | * included PNG_FLAG_MNG_FILTER_64 and |
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285 | * 4. The filter_method is 64 and |
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286 | * 5. The color_type is RGB or RGBA |
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287 | */ |
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288 | if((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&png_ptr->mng_features_permitted) |
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289 | png_warning(png_ptr,"MNG features are not allowed in a PNG datastream\n"); |
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290 | if(filter_type != PNG_FILTER_TYPE_BASE) |
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291 | { |
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292 | if(!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && |
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293 | (filter_type == PNG_INTRAPIXEL_DIFFERENCING) && |
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294 | ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) && |
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295 | (color_type == PNG_COLOR_TYPE_RGB || |
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296 | color_type == PNG_COLOR_TYPE_RGB_ALPHA))) |
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297 | png_error(png_ptr, "Unknown filter method in IHDR"); |
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298 | if(png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) |
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299 | png_warning(png_ptr, "Invalid filter method in IHDR"); |
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300 | } |
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301 | #else |
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302 | if(filter_type != PNG_FILTER_TYPE_BASE) |
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303 | png_error(png_ptr, "Unknown filter method in IHDR"); |
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304 | #endif |
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305 | |||
306 | info_ptr->width = width; |
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307 | info_ptr->height = height; |
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308 | info_ptr->bit_depth = (png_byte)bit_depth; |
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309 | info_ptr->color_type =(png_byte) color_type; |
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310 | info_ptr->compression_type = (png_byte)compression_type; |
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311 | info_ptr->filter_type = (png_byte)filter_type; |
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312 | info_ptr->interlace_type = (png_byte)interlace_type; |
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313 | if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) |
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314 | info_ptr->channels = 1; |
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315 | else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR) |
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316 | info_ptr->channels = 3; |
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317 | else |
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318 | info_ptr->channels = 1; |
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319 | if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA) |
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320 | info_ptr->channels++; |
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321 | info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth); |
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322 | |||
323 | /* check for overflow */ |
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324 | rowbytes_per_pixel = (info_ptr->pixel_depth + 7) >> 3; |
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325 | if ( width > PNG_MAX_UINT/rowbytes_per_pixel - 64) |
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326 | { |
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327 | png_warning(png_ptr, |
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328 | "Width too large to process image data; rowbytes will overflow."); |
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329 | info_ptr->rowbytes = (png_size_t)0; |
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330 | } |
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331 | else |
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332 | info_ptr->rowbytes = (info_ptr->width * info_ptr->pixel_depth + 7) >> 3; |
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333 | } |
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334 | |||
335 | #if defined(PNG_oFFs_SUPPORTED) |
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336 | void PNGAPI |
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337 | png_set_oFFs(png_structp png_ptr, png_infop info_ptr, |
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338 | png_int_32 offset_x, png_int_32 offset_y, int unit_type) |
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339 | { |
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340 | png_debug1(1, "in %s storage function\n", "oFFs"); |
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341 | if (png_ptr == NULL || info_ptr == NULL) |
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342 | return; |
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343 | |||
344 | info_ptr->x_offset = offset_x; |
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345 | info_ptr->y_offset = offset_y; |
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346 | info_ptr->offset_unit_type = (png_byte)unit_type; |
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347 | info_ptr->valid |= PNG_INFO_oFFs; |
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348 | } |
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349 | #endif |
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350 | |||
351 | #if defined(PNG_pCAL_SUPPORTED) |
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352 | void PNGAPI |
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353 | png_set_pCAL(png_structp png_ptr, png_infop info_ptr, |
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354 | png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams, |
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355 | png_charp units, png_charpp params) |
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356 | { |
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357 | png_uint_32 length; |
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358 | int i; |
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359 | |||
360 | png_debug1(1, "in %s storage function\n", "pCAL"); |
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361 | if (png_ptr == NULL || info_ptr == NULL) |
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362 | return; |
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363 | |||
364 | length = png_strlen(purpose) + 1; |
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365 | png_debug1(3, "allocating purpose for info (%lu bytes)\n", length); |
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366 | info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length); |
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367 | if (info_ptr->pcal_purpose == NULL) |
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368 | { |
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369 | png_warning(png_ptr, "Insufficient memory for pCAL purpose."); |
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370 | return; |
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371 | } |
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372 | png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length); |
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373 | |||
374 | png_debug(3, "storing X0, X1, type, and nparams in info\n"); |
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375 | info_ptr->pcal_X0 = X0; |
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376 | info_ptr->pcal_X1 = X1; |
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377 | info_ptr->pcal_type = (png_byte)type; |
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378 | info_ptr->pcal_nparams = (png_byte)nparams; |
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379 | |||
380 | length = png_strlen(units) + 1; |
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381 | png_debug1(3, "allocating units for info (%lu bytes)\n", length); |
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382 | info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length); |
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383 | if (info_ptr->pcal_units == NULL) |
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384 | { |
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385 | png_warning(png_ptr, "Insufficient memory for pCAL units."); |
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386 | return; |
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387 | } |
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388 | png_memcpy(info_ptr->pcal_units, units, (png_size_t)length); |
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389 | |||
390 | info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr, |
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391 | (png_uint_32)((nparams + 1) * sizeof(png_charp))); |
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392 | if (info_ptr->pcal_params == NULL) |
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393 | { |
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394 | png_warning(png_ptr, "Insufficient memory for pCAL params."); |
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395 | return; |
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396 | } |
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397 | |||
398 | info_ptr->pcal_params[nparams] = NULL; |
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399 | |||
400 | for (i = 0; i < nparams; i++) |
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401 | { |
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402 | length = png_strlen(params[i]) + 1; |
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403 | png_debug2(3, "allocating parameter %d for info (%lu bytes)\n", i, length); |
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404 | info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length); |
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405 | if (info_ptr->pcal_params[i] == NULL) |
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406 | { |
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407 | png_warning(png_ptr, "Insufficient memory for pCAL parameter."); |
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408 | return; |
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409 | } |
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410 | png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length); |
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411 | } |
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412 | |||
413 | info_ptr->valid |= PNG_INFO_pCAL; |
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414 | #ifdef PNG_FREE_ME_SUPPORTED |
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415 | info_ptr->free_me |= PNG_FREE_PCAL; |
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416 | #endif |
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417 | } |
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418 | #endif |
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419 | |||
420 | #if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED) |
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421 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
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422 | void PNGAPI |
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423 | png_set_sCAL(png_structp png_ptr, png_infop info_ptr, |
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424 | int unit, double width, double height) |
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425 | { |
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426 | png_debug1(1, "in %s storage function\n", "sCAL"); |
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427 | if (png_ptr == NULL || info_ptr == NULL) |
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428 | return; |
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429 | |||
430 | info_ptr->scal_unit = (png_byte)unit; |
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431 | info_ptr->scal_pixel_width = width; |
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432 | info_ptr->scal_pixel_height = height; |
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433 | |||
434 | info_ptr->valid |= PNG_INFO_sCAL; |
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435 | } |
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436 | #else |
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437 | #ifdef PNG_FIXED_POINT_SUPPORTED |
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438 | void PNGAPI |
||
439 | png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr, |
||
440 | int unit, png_charp swidth, png_charp sheight) |
||
441 | { |
||
442 | png_uint_32 length; |
||
443 | |||
444 | png_debug1(1, "in %s storage function\n", "sCAL"); |
||
445 | if (png_ptr == NULL || info_ptr == NULL) |
||
446 | return; |
||
447 | |||
448 | info_ptr->scal_unit = (png_byte)unit; |
||
449 | |||
450 | length = png_strlen(swidth) + 1; |
||
451 | png_debug1(3, "allocating unit for info (%d bytes)\n", length); |
||
452 | info_ptr->scal_s_width = (png_charp)png_malloc(png_ptr, length); |
||
453 | png_memcpy(info_ptr->scal_s_width, swidth, (png_size_t)length); |
||
454 | |||
455 | length = png_strlen(sheight) + 1; |
||
456 | png_debug1(3, "allocating unit for info (%d bytes)\n", length); |
||
457 | info_ptr->scal_s_height = (png_charp)png_malloc(png_ptr, length); |
||
458 | png_memcpy(info_ptr->scal_s_height, sheight, (png_size_t)length); |
||
459 | |||
460 | info_ptr->valid |= PNG_INFO_sCAL; |
||
461 | #ifdef PNG_FREE_ME_SUPPORTED |
||
462 | info_ptr->free_me |= PNG_FREE_SCAL; |
||
463 | #endif |
||
464 | } |
||
465 | #endif |
||
466 | #endif |
||
467 | #endif |
||
468 | |||
469 | #if defined(PNG_pHYs_SUPPORTED) |
||
470 | void PNGAPI |
||
471 | png_set_pHYs(png_structp png_ptr, png_infop info_ptr, |
||
472 | png_uint_32 res_x, png_uint_32 res_y, int unit_type) |
||
473 | { |
||
474 | png_debug1(1, "in %s storage function\n", "pHYs"); |
||
475 | if (png_ptr == NULL || info_ptr == NULL) |
||
476 | return; |
||
477 | |||
478 | info_ptr->x_pixels_per_unit = res_x; |
||
479 | info_ptr->y_pixels_per_unit = res_y; |
||
480 | info_ptr->phys_unit_type = (png_byte)unit_type; |
||
481 | info_ptr->valid |= PNG_INFO_pHYs; |
||
482 | } |
||
483 | #endif |
||
484 | |||
485 | void PNGAPI |
||
486 | png_set_PLTE(png_structp png_ptr, png_infop info_ptr, |
||
487 | png_colorp palette, int num_palette) |
||
488 | { |
||
489 | |||
490 | png_debug1(1, "in %s storage function\n", "PLTE"); |
||
491 | if (png_ptr == NULL || info_ptr == NULL) |
||
492 | return; |
||
493 | |||
494 | /* |
||
495 | * It may not actually be necessary to set png_ptr->palette here; |
||
496 | * we do it for backward compatibility with the way the png_handle_tRNS |
||
497 | * function used to do the allocation. |
||
498 | */ |
||
499 | #ifdef PNG_FREE_ME_SUPPORTED |
||
500 | png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0); |
||
501 | #endif |
||
502 | /* Changed in libpng-1.2.1 to allocate 256 instead of num_palette entries, |
||
503 | in case of an invalid PNG file that has too-large sample values. */ |
||
504 | png_ptr->palette = (png_colorp)png_zalloc(png_ptr, (uInt)256, |
||
505 | sizeof (png_color)); |
||
506 | if (png_ptr->palette == NULL) |
||
507 | png_error(png_ptr, "Unable to malloc palette"); |
||
508 | png_memcpy(png_ptr->palette, palette, num_palette * sizeof (png_color)); |
||
509 | info_ptr->palette = png_ptr->palette; |
||
510 | info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette; |
||
511 | |||
512 | #ifdef PNG_FREE_ME_SUPPORTED |
||
513 | info_ptr->free_me |= PNG_FREE_PLTE; |
||
514 | #else |
||
515 | png_ptr->flags |= PNG_FLAG_FREE_PLTE; |
||
516 | #endif |
||
517 | |||
518 | info_ptr->valid |= PNG_INFO_PLTE; |
||
519 | } |
||
520 | |||
521 | #if defined(PNG_sBIT_SUPPORTED) |
||
522 | void PNGAPI |
||
523 | png_set_sBIT(png_structp png_ptr, png_infop info_ptr, |
||
524 | png_color_8p sig_bit) |
||
525 | { |
||
526 | png_debug1(1, "in %s storage function\n", "sBIT"); |
||
527 | if (png_ptr == NULL || info_ptr == NULL) |
||
528 | return; |
||
529 | |||
530 | png_memcpy(&(info_ptr->sig_bit), sig_bit, sizeof (png_color_8)); |
||
531 | info_ptr->valid |= PNG_INFO_sBIT; |
||
532 | } |
||
533 | #endif |
||
534 | |||
535 | #if defined(PNG_sRGB_SUPPORTED) |
||
536 | void PNGAPI |
||
537 | png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent) |
||
538 | { |
||
539 | png_debug1(1, "in %s storage function\n", "sRGB"); |
||
540 | if (png_ptr == NULL || info_ptr == NULL) |
||
541 | return; |
||
542 | |||
543 | info_ptr->srgb_intent = (png_byte)intent; |
||
544 | info_ptr->valid |= PNG_INFO_sRGB; |
||
545 | } |
||
546 | |||
547 | void PNGAPI |
||
548 | png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr, |
||
549 | int intent) |
||
550 | { |
||
551 | #if defined(PNG_gAMA_SUPPORTED) |
||
552 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
||
553 | float file_gamma; |
||
554 | #endif |
||
555 | #ifdef PNG_FIXED_POINT_SUPPORTED |
||
556 | png_fixed_point int_file_gamma; |
||
557 | #endif |
||
558 | #endif |
||
559 | #if defined(PNG_cHRM_SUPPORTED) |
||
560 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
||
561 | float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y; |
||
562 | #endif |
||
563 | #ifdef PNG_FIXED_POINT_SUPPORTED |
||
564 | png_fixed_point int_white_x, int_white_y, int_red_x, int_red_y, int_green_x, |
||
565 | int_green_y, int_blue_x, int_blue_y; |
||
566 | #endif |
||
567 | #endif |
||
568 | png_debug1(1, "in %s storage function\n", "sRGB_gAMA_and_cHRM"); |
||
569 | if (png_ptr == NULL || info_ptr == NULL) |
||
570 | return; |
||
571 | |||
572 | png_set_sRGB(png_ptr, info_ptr, intent); |
||
573 | |||
574 | #if defined(PNG_gAMA_SUPPORTED) |
||
575 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
||
576 | file_gamma = (float).45455; |
||
577 | png_set_gAMA(png_ptr, info_ptr, file_gamma); |
||
578 | #endif |
||
579 | #ifdef PNG_FIXED_POINT_SUPPORTED |
||
580 | int_file_gamma = 45455L; |
||
581 | png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma); |
||
582 | #endif |
||
583 | #endif |
||
584 | |||
585 | #if defined(PNG_cHRM_SUPPORTED) |
||
586 | #ifdef PNG_FIXED_POINT_SUPPORTED |
||
587 | int_white_x = 31270L; |
||
588 | int_white_y = 32900L; |
||
589 | int_red_x = 64000L; |
||
590 | int_red_y = 33000L; |
||
591 | int_green_x = 30000L; |
||
592 | int_green_y = 60000L; |
||
593 | int_blue_x = 15000L; |
||
594 | int_blue_y = 6000L; |
||
595 | |||
596 | png_set_cHRM_fixed(png_ptr, info_ptr, |
||
597 | int_white_x, int_white_y, int_red_x, int_red_y, int_green_x, int_green_y, |
||
598 | int_blue_x, int_blue_y); |
||
599 | #endif |
||
600 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
||
601 | white_x = (float).3127; |
||
602 | white_y = (float).3290; |
||
603 | red_x = (float).64; |
||
604 | red_y = (float).33; |
||
605 | green_x = (float).30; |
||
606 | green_y = (float).60; |
||
607 | blue_x = (float).15; |
||
608 | blue_y = (float).06; |
||
609 | |||
610 | png_set_cHRM(png_ptr, info_ptr, |
||
611 | white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y); |
||
612 | #endif |
||
613 | #endif |
||
614 | } |
||
615 | #endif |
||
616 | |||
617 | |||
618 | #if defined(PNG_iCCP_SUPPORTED) |
||
619 | void PNGAPI |
||
620 | png_set_iCCP(png_structp png_ptr, png_infop info_ptr, |
||
621 | png_charp name, int compression_type, |
||
622 | png_charp profile, png_uint_32 proflen) |
||
623 | { |
||
624 | png_charp new_iccp_name; |
||
625 | png_charp new_iccp_profile; |
||
626 | |||
627 | png_debug1(1, "in %s storage function\n", "iCCP"); |
||
628 | if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL) |
||
629 | return; |
||
630 | |||
631 | new_iccp_name = (png_charp)png_malloc(png_ptr, png_strlen(name)+1); |
||
632 | png_strcpy(new_iccp_name, name); |
||
633 | new_iccp_profile = (png_charp)png_malloc(png_ptr, proflen); |
||
634 | png_memcpy(new_iccp_profile, profile, (png_size_t)proflen); |
||
635 | |||
636 | png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0); |
||
637 | |||
638 | info_ptr->iccp_proflen = proflen; |
||
639 | info_ptr->iccp_name = new_iccp_name; |
||
640 | info_ptr->iccp_profile = new_iccp_profile; |
||
641 | /* Compression is always zero but is here so the API and info structure |
||
642 | * does not have to change if we introduce multiple compression types */ |
||
643 | info_ptr->iccp_compression = (png_byte)compression_type; |
||
644 | #ifdef PNG_FREE_ME_SUPPORTED |
||
645 | info_ptr->free_me |= PNG_FREE_ICCP; |
||
646 | #endif |
||
647 | info_ptr->valid |= PNG_INFO_iCCP; |
||
648 | } |
||
649 | #endif |
||
650 | |||
651 | #if defined(PNG_TEXT_SUPPORTED) |
||
652 | void PNGAPI |
||
653 | png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, |
||
654 | int num_text) |
||
655 | { |
||
656 | int ret; |
||
657 | ret=png_set_text_2(png_ptr, info_ptr, text_ptr, num_text); |
||
658 | if (ret) |
||
659 | png_error(png_ptr, "Insufficient memory to store text"); |
||
660 | } |
||
661 | |||
662 | int /* PRIVATE */ |
||
663 | png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, |
||
664 | int num_text) |
||
665 | { |
||
666 | int i; |
||
667 | |||
668 | png_debug1(1, "in %s storage function\n", (png_ptr->chunk_name[0] == '\0' ? |
||
669 | "text" : (png_const_charp)png_ptr->chunk_name)); |
||
670 | |||
671 | if (png_ptr == NULL || info_ptr == NULL || num_text == 0) |
||
672 | return(0); |
||
673 | |||
674 | /* Make sure we have enough space in the "text" array in info_struct |
||
675 | * to hold all of the incoming text_ptr objects. |
||
676 | */ |
||
677 | if (info_ptr->num_text + num_text > info_ptr->max_text) |
||
678 | { |
||
679 | if (info_ptr->text != NULL) |
||
680 | { |
||
681 | png_textp old_text; |
||
682 | int old_max; |
||
683 | |||
684 | old_max = info_ptr->max_text; |
||
685 | info_ptr->max_text = info_ptr->num_text + num_text + 8; |
||
686 | old_text = info_ptr->text; |
||
687 | info_ptr->text = (png_textp)png_malloc_warn(png_ptr, |
||
688 | (png_uint_32)(info_ptr->max_text * sizeof (png_text))); |
||
689 | if (info_ptr->text == NULL) |
||
690 | { |
||
691 | png_free(png_ptr, old_text); |
||
692 | return(1); |
||
693 | } |
||
694 | png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max * |
||
695 | sizeof(png_text))); |
||
696 | png_free(png_ptr, old_text); |
||
697 | } |
||
698 | else |
||
699 | { |
||
700 | info_ptr->max_text = num_text + 8; |
||
701 | info_ptr->num_text = 0; |
||
702 | info_ptr->text = (png_textp)png_malloc_warn(png_ptr, |
||
703 | (png_uint_32)(info_ptr->max_text * sizeof (png_text))); |
||
704 | if (info_ptr->text == NULL) |
||
705 | return(1); |
||
706 | #ifdef PNG_FREE_ME_SUPPORTED |
||
707 | info_ptr->free_me |= PNG_FREE_TEXT; |
||
708 | #endif |
||
709 | } |
||
710 | png_debug1(3, "allocated %d entries for info_ptr->text\n", |
||
711 | info_ptr->max_text); |
||
712 | } |
||
713 | for (i = 0; i < num_text; i++) |
||
714 | { |
||
715 | png_size_t text_length,key_len; |
||
716 | png_size_t lang_len,lang_key_len; |
||
717 | png_textp textp = &(info_ptr->text[info_ptr->num_text]); |
||
718 | |||
719 | if (text_ptr[i].key == NULL) |
||
720 | continue; |
||
721 | |||
722 | key_len = png_strlen(text_ptr[i].key); |
||
723 | |||
724 | if(text_ptr[i].compression <= 0) |
||
725 | { |
||
726 | lang_len = 0; |
||
727 | lang_key_len = 0; |
||
728 | } |
||
729 | else |
||
730 | #ifdef PNG_iTXt_SUPPORTED |
||
731 | { |
||
732 | /* set iTXt data */ |
||
733 | if (text_ptr[i].lang != NULL) |
||
734 | lang_len = png_strlen(text_ptr[i].lang); |
||
735 | else |
||
736 | lang_len = 0; |
||
737 | if (text_ptr[i].lang_key != NULL) |
||
738 | lang_key_len = png_strlen(text_ptr[i].lang_key); |
||
739 | else |
||
740 | lang_key_len = 0; |
||
741 | } |
||
742 | #else |
||
743 | { |
||
744 | png_warning(png_ptr, "iTXt chunk not supported."); |
||
745 | continue; |
||
746 | } |
||
747 | #endif |
||
748 | |||
749 | if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0') |
||
750 | { |
||
751 | text_length = 0; |
||
752 | #ifdef PNG_iTXt_SUPPORTED |
||
753 | if(text_ptr[i].compression > 0) |
||
754 | textp->compression = PNG_ITXT_COMPRESSION_NONE; |
||
755 | else |
||
756 | #endif |
||
757 | textp->compression = PNG_TEXT_COMPRESSION_NONE; |
||
758 | } |
||
759 | else |
||
760 | { |
||
761 | text_length = png_strlen(text_ptr[i].text); |
||
762 | textp->compression = text_ptr[i].compression; |
||
763 | } |
||
764 | |||
765 | textp->key = (png_charp)png_malloc_warn(png_ptr, |
||
766 | (png_uint_32)(key_len + text_length + lang_len + lang_key_len + 4)); |
||
767 | if (textp->key == NULL) |
||
768 | return(1); |
||
769 | png_debug2(2, "Allocated %lu bytes at %x in png_set_text\n", |
||
770 | (png_uint_32)(key_len + lang_len + lang_key_len + text_length + 4), |
||
771 | (int)textp->key); |
||
772 | |||
773 | png_memcpy(textp->key, text_ptr[i].key, |
||
774 | (png_size_t)(key_len)); |
||
775 | *(textp->key+key_len) = '\0'; |
||
776 | #ifdef PNG_iTXt_SUPPORTED |
||
777 | if (text_ptr[i].compression > 0) |
||
778 | { |
||
779 | textp->lang=textp->key + key_len + 1; |
||
780 | png_memcpy(textp->lang, text_ptr[i].lang, lang_len); |
||
781 | *(textp->lang+lang_len) = '\0'; |
||
782 | textp->lang_key=textp->lang + lang_len + 1; |
||
783 | png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len); |
||
784 | *(textp->lang_key+lang_key_len) = '\0'; |
||
785 | textp->text=textp->lang_key + lang_key_len + 1; |
||
786 | } |
||
787 | else |
||
788 | #endif |
||
789 | { |
||
790 | #ifdef PNG_iTXt_SUPPORTED |
||
791 | textp->lang=NULL; |
||
792 | textp->lang_key=NULL; |
||
793 | #endif |
||
794 | textp->text=textp->key + key_len + 1; |
||
795 | } |
||
796 | if(text_length) |
||
797 | png_memcpy(textp->text, text_ptr[i].text, |
||
798 | (png_size_t)(text_length)); |
||
799 | *(textp->text+text_length) = '\0'; |
||
800 | |||
801 | #ifdef PNG_iTXt_SUPPORTED |
||
802 | if(textp->compression > 0) |
||
803 | { |
||
804 | textp->text_length = 0; |
||
805 | textp->itxt_length = text_length; |
||
806 | } |
||
807 | else |
||
808 | #endif |
||
809 | { |
||
810 | textp->text_length = text_length; |
||
811 | #ifdef PNG_iTXt_SUPPORTED |
||
812 | textp->itxt_length = 0; |
||
813 | #endif |
||
814 | } |
||
815 | info_ptr->text[info_ptr->num_text]= *textp; |
||
816 | info_ptr->num_text++; |
||
817 | png_debug1(3, "transferred text chunk %d\n", info_ptr->num_text); |
||
818 | } |
||
819 | return(0); |
||
820 | } |
||
821 | #endif |
||
822 | |||
823 | #if defined(PNG_tIME_SUPPORTED) |
||
824 | void PNGAPI |
||
825 | png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time) |
||
826 | { |
||
827 | png_debug1(1, "in %s storage function\n", "tIME"); |
||
828 | if (png_ptr == NULL || info_ptr == NULL || |
||
829 | (png_ptr->mode & PNG_WROTE_tIME)) |
||
830 | return; |
||
831 | |||
832 | png_memcpy(&(info_ptr->mod_time), mod_time, sizeof (png_time)); |
||
833 | info_ptr->valid |= PNG_INFO_tIME; |
||
834 | } |
||
835 | #endif |
||
836 | |||
837 | #if defined(PNG_tRNS_SUPPORTED) |
||
838 | void PNGAPI |
||
839 | png_set_tRNS(png_structp png_ptr, png_infop info_ptr, |
||
840 | png_bytep trans, int num_trans, png_color_16p trans_values) |
||
841 | { |
||
842 | png_debug1(1, "in %s storage function\n", "tRNS"); |
||
843 | if (png_ptr == NULL || info_ptr == NULL) |
||
844 | return; |
||
845 | |||
846 | if (trans != NULL) |
||
847 | { |
||
848 | /* |
||
849 | * It may not actually be necessary to set png_ptr->trans here; |
||
850 | * we do it for backward compatibility with the way the png_handle_tRNS |
||
851 | * function used to do the allocation. |
||
852 | */ |
||
853 | #ifdef PNG_FREE_ME_SUPPORTED |
||
854 | png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0); |
||
855 | #endif |
||
856 | /* Changed from num_trans to 256 in version 1.2.1 */ |
||
857 | png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr, |
||
858 | (png_uint_32)256); |
||
859 | png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans); |
||
860 | #ifdef PNG_FREE_ME_SUPPORTED |
||
861 | info_ptr->free_me |= PNG_FREE_TRNS; |
||
862 | #else |
||
863 | png_ptr->flags |= PNG_FLAG_FREE_TRNS; |
||
864 | #endif |
||
865 | } |
||
866 | |||
867 | if (trans_values != NULL) |
||
868 | { |
||
869 | png_memcpy(&(info_ptr->trans_values), trans_values, |
||
870 | sizeof(png_color_16)); |
||
871 | if (num_trans == 0) |
||
872 | num_trans = 1; |
||
873 | } |
||
874 | info_ptr->num_trans = (png_uint_16)num_trans; |
||
875 | info_ptr->valid |= PNG_INFO_tRNS; |
||
876 | } |
||
877 | #endif |
||
878 | |||
879 | #if defined(PNG_sPLT_SUPPORTED) |
||
880 | void PNGAPI |
||
881 | png_set_sPLT(png_structp png_ptr, |
||
882 | png_infop info_ptr, png_sPLT_tp entries, int nentries) |
||
883 | { |
||
884 | png_sPLT_tp np; |
||
885 | int i; |
||
886 | |||
887 | np = (png_sPLT_tp)png_malloc_warn(png_ptr, |
||
888 | (info_ptr->splt_palettes_num + nentries) * sizeof(png_sPLT_t)); |
||
889 | if (np == NULL) |
||
890 | { |
||
891 | png_warning(png_ptr, "No memory for sPLT palettes."); |
||
892 | return; |
||
893 | } |
||
894 | |||
895 | png_memcpy(np, info_ptr->splt_palettes, |
||
896 | info_ptr->splt_palettes_num * sizeof(png_sPLT_t)); |
||
897 | png_free(png_ptr, info_ptr->splt_palettes); |
||
898 | info_ptr->splt_palettes=NULL; |
||
899 | |||
900 | for (i = 0; i < nentries; i++) |
||
901 | { |
||
902 | png_sPLT_tp to = np + info_ptr->splt_palettes_num + i; |
||
903 | png_sPLT_tp from = entries + i; |
||
904 | |||
905 | to->name = (png_charp)png_malloc(png_ptr, |
||
906 | png_strlen(from->name) + 1); |
||
907 | png_strcpy(to->name, from->name); |
||
908 | to->entries = (png_sPLT_entryp)png_malloc(png_ptr, |
||
909 | from->nentries * sizeof(png_sPLT_t)); |
||
910 | png_memcpy(to->entries, from->entries, |
||
911 | from->nentries * sizeof(png_sPLT_t)); |
||
912 | to->nentries = from->nentries; |
||
913 | to->depth = from->depth; |
||
914 | } |
||
915 | |||
916 | info_ptr->splt_palettes = np; |
||
917 | info_ptr->splt_palettes_num += nentries; |
||
918 | info_ptr->valid |= PNG_INFO_sPLT; |
||
919 | #ifdef PNG_FREE_ME_SUPPORTED |
||
920 | info_ptr->free_me |= PNG_FREE_SPLT; |
||
921 | #endif |
||
922 | } |
||
923 | #endif /* PNG_sPLT_SUPPORTED */ |
||
924 | |||
925 | #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) |
||
926 | void PNGAPI |
||
927 | png_set_unknown_chunks(png_structp png_ptr, |
||
928 | png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns) |
||
929 | { |
||
930 | png_unknown_chunkp np; |
||
931 | int i; |
||
932 | |||
933 | if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0) |
||
934 | return; |
||
935 | |||
936 | np = (png_unknown_chunkp)png_malloc_warn(png_ptr, |
||
937 | (info_ptr->unknown_chunks_num + num_unknowns) * |
||
938 | sizeof(png_unknown_chunk)); |
||
939 | if (np == NULL) |
||
940 | { |
||
941 | png_warning(png_ptr, "Out of memory while processing unknown chunk."); |
||
942 | return; |
||
943 | } |
||
944 | |||
945 | png_memcpy(np, info_ptr->unknown_chunks, |
||
946 | info_ptr->unknown_chunks_num * sizeof(png_unknown_chunk)); |
||
947 | png_free(png_ptr, info_ptr->unknown_chunks); |
||
948 | info_ptr->unknown_chunks=NULL; |
||
949 | |||
950 | for (i = 0; i < num_unknowns; i++) |
||
951 | { |
||
952 | png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i; |
||
953 | png_unknown_chunkp from = unknowns + i; |
||
954 | |||
955 | png_strcpy((png_charp)to->name, (png_charp)from->name); |
||
956 | to->data = (png_bytep)png_malloc(png_ptr, from->size); |
||
957 | if (to->data == NULL) |
||
958 | png_warning(png_ptr, "Out of memory while processing unknown chunk."); |
||
959 | else |
||
960 | { |
||
961 | png_memcpy(to->data, from->data, from->size); |
||
962 | to->size = from->size; |
||
963 | |||
964 | /* note our location in the read or write sequence */ |
||
965 | to->location = (png_byte)(png_ptr->mode & 0xff); |
||
966 | } |
||
967 | } |
||
968 | |||
969 | info_ptr->unknown_chunks = np; |
||
970 | info_ptr->unknown_chunks_num += num_unknowns; |
||
971 | #ifdef PNG_FREE_ME_SUPPORTED |
||
972 | info_ptr->free_me |= PNG_FREE_UNKN; |
||
973 | #endif |
||
974 | } |
||
975 | void PNGAPI |
||
976 | png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr, |
||
977 | int chunk, int location) |
||
978 | { |
||
979 | if(png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk < |
||
980 | (int)info_ptr->unknown_chunks_num) |
||
981 | info_ptr->unknown_chunks[chunk].location = (png_byte)location; |
||
982 | } |
||
983 | #endif |
||
984 | |||
985 | #if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \ |
||
986 | defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED) |
||
987 | void PNGAPI |
||
988 | png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted) |
||
989 | { |
||
990 | /* This function is deprecated in favor of png_permit_mng_features() |
||
991 | and will be removed from libpng-2.0.0 */ |
||
992 | png_debug(1, "in png_permit_empty_plte, DEPRECATED.\n"); |
||
993 | if (png_ptr == NULL) |
||
994 | return; |
||
995 | png_ptr->mng_features_permitted = (png_byte) |
||
996 | ((png_ptr->mng_features_permitted & (~(PNG_FLAG_MNG_EMPTY_PLTE))) | |
||
997 | ((empty_plte_permitted & PNG_FLAG_MNG_EMPTY_PLTE))); |
||
998 | } |
||
999 | #endif |
||
1000 | |||
1001 | #if defined(PNG_MNG_FEATURES_SUPPORTED) |
||
1002 | png_uint_32 PNGAPI |
||
1003 | png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features) |
||
1004 | { |
||
1005 | png_debug(1, "in png_permit_mng_features\n"); |
||
1006 | if (png_ptr == NULL) |
||
1007 | return (png_uint_32)0; |
||
1008 | png_ptr->mng_features_permitted = |
||
1009 | (png_byte)(mng_features & PNG_ALL_MNG_FEATURES); |
||
1010 | return (png_uint_32)png_ptr->mng_features_permitted; |
||
1011 | } |
||
1012 | #endif |
||
1013 | |||
1014 | #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) |
||
1015 | void PNGAPI |
||
1016 | png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep |
||
1017 | chunk_list, int num_chunks) |
||
1018 | { |
||
1019 | png_bytep new_list, p; |
||
1020 | int i, old_num_chunks; |
||
1021 | if (num_chunks == 0) |
||
1022 | { |
||
1023 | if(keep == HANDLE_CHUNK_ALWAYS || keep == HANDLE_CHUNK_IF_SAFE) |
||
1024 | png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS; |
||
1025 | else |
||
1026 | png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS; |
||
1027 | |||
1028 | if(keep == HANDLE_CHUNK_ALWAYS) |
||
1029 | png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS; |
||
1030 | else |
||
1031 | png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS; |
||
1032 | return; |
||
1033 | } |
||
1034 | if (chunk_list == NULL) |
||
1035 | return; |
||
1036 | old_num_chunks=png_ptr->num_chunk_list; |
||
1037 | new_list=(png_bytep)png_malloc(png_ptr, |
||
1038 | (png_uint_32)(5*(num_chunks+old_num_chunks))); |
||
1039 | if(png_ptr->chunk_list != NULL) |
||
1040 | { |
||
1041 | png_memcpy(new_list, png_ptr->chunk_list, |
||
1042 | (png_size_t)(5*old_num_chunks)); |
||
1043 | png_free(png_ptr, png_ptr->chunk_list); |
||
1044 | png_ptr->chunk_list=NULL; |
||
1045 | } |
||
1046 | png_memcpy(new_list+5*old_num_chunks, chunk_list, |
||
1047 | (png_size_t)(5*num_chunks)); |
||
1048 | for (p=new_list+5*old_num_chunks+4, i=0; i<num_chunks; i++, p+=5) |
||
1049 | *p=(png_byte)keep; |
||
1050 | png_ptr->num_chunk_list=old_num_chunks+num_chunks; |
||
1051 | png_ptr->chunk_list=new_list; |
||
1052 | #ifdef PNG_FREE_ME_SUPPORTED |
||
1053 | png_ptr->free_me |= PNG_FREE_LIST; |
||
1054 | #endif |
||
1055 | } |
||
1056 | #endif |
||
1057 | |||
1058 | #if defined(PNG_READ_USER_CHUNKS_SUPPORTED) |
||
1059 | void PNGAPI |
||
1060 | png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr, |
||
1061 | png_user_chunk_ptr read_user_chunk_fn) |
||
1062 | { |
||
1063 | png_debug(1, "in png_set_read_user_chunk_fn\n"); |
||
1064 | png_ptr->read_user_chunk_fn = read_user_chunk_fn; |
||
1065 | png_ptr->user_chunk_ptr = user_chunk_ptr; |
||
1066 | } |
||
1067 | #endif |
||
1068 | |||
1069 | #if defined(PNG_INFO_IMAGE_SUPPORTED) |
||
1070 | void PNGAPI |
||
1071 | png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers) |
||
1072 | { |
||
1073 | png_debug1(1, "in %s storage function\n", "rows"); |
||
1074 | |||
1075 | if (png_ptr == NULL || info_ptr == NULL) |
||
1076 | return; |
||
1077 | |||
1078 | if(info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers)) |
||
1079 | png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0); |
||
1080 | info_ptr->row_pointers = row_pointers; |
||
1081 | if(row_pointers) |
||
1082 | info_ptr->valid |= PNG_INFO_IDAT; |
||
1083 | } |
||
1084 | #endif |
||
1085 | |||
1086 | void PNGAPI |
||
1087 | png_set_compression_buffer_size(png_structp png_ptr, png_uint_32 size) |
||
1088 | { |
||
1089 | if(png_ptr->zbuf) |
||
1090 | png_free(png_ptr, png_ptr->zbuf); |
||
1091 | png_ptr->zbuf_size = (png_size_t)size; |
||
1092 | png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size); |
||
1093 | png_ptr->zstream.next_out = png_ptr->zbuf; |
||
1094 | png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; |
||
1095 | } |
||
1096 | |||
1097 | void PNGAPI |
||
1098 | png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask) |
||
1099 | { |
||
1100 | if (png_ptr && info_ptr) |
||
1101 | info_ptr->valid &= ~(mask); |
||
1102 | } |
||
1103 | |||
1104 | |||
1105 | #ifndef PNG_1_0_X |
||
1106 | #ifdef PNG_ASSEMBLER_CODE_SUPPORTED |
||
1107 | /* this function was added to libpng 1.2.0 and should always exist by default */ |
||
1108 | void PNGAPI |
||
1109 | png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags) |
||
1110 | { |
||
1111 | png_uint_32 settable_asm_flags; |
||
1112 | png_uint_32 settable_mmx_flags; |
||
1113 | |||
1114 | settable_mmx_flags = |
||
1115 | #ifdef PNG_HAVE_ASSEMBLER_COMBINE_ROW |
||
1116 | PNG_ASM_FLAG_MMX_READ_COMBINE_ROW | |
||
1117 | #endif |
||
1118 | #ifdef PNG_HAVE_ASSEMBLER_READ_INTERLACE |
||
1119 | PNG_ASM_FLAG_MMX_READ_INTERLACE | |
||
1120 | #endif |
||
1121 | #ifdef PNG_HAVE_ASSEMBLER_READ_FILTER_ROW |
||
1122 | PNG_ASM_FLAG_MMX_READ_FILTER_SUB | |
||
1123 | PNG_ASM_FLAG_MMX_READ_FILTER_UP | |
||
1124 | PNG_ASM_FLAG_MMX_READ_FILTER_AVG | |
||
1125 | PNG_ASM_FLAG_MMX_READ_FILTER_PAETH | |
||
1126 | #endif |
||
1127 | 0; |
||
1128 | |||
1129 | /* could be some non-MMX ones in the future, but not currently: */ |
||
1130 | settable_asm_flags = settable_mmx_flags; |
||
1131 | |||
1132 | if (!(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_SUPPORT_COMPILED) || |
||
1133 | !(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU)) |
||
1134 | { |
||
1135 | /* clear all MMX flags if MMX isn't supported */ |
||
1136 | settable_asm_flags &= ~settable_mmx_flags; |
||
1137 | png_ptr->asm_flags &= ~settable_mmx_flags; |
||
1138 | } |
||
1139 | |||
1140 | /* we're replacing the settable bits with those passed in by the user, |
||
1141 | * so first zero them out of the master copy, then logical-OR in the |
||
1142 | * allowed subset that was requested */ |
||
1143 | |||
1144 | png_ptr->asm_flags &= ~settable_asm_flags; /* zero them */ |
||
1145 | png_ptr->asm_flags |= (asm_flags & settable_asm_flags); /* set them */ |
||
1146 | } |
||
1147 | #endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */ |
||
1148 | |||
1149 | #ifdef PNG_ASSEMBLER_CODE_SUPPORTED |
||
1150 | /* this function was added to libpng 1.2.0 */ |
||
1151 | void PNGAPI |
||
1152 | png_set_mmx_thresholds (png_structp png_ptr, |
||
1153 | png_byte mmx_bitdepth_threshold, |
||
1154 | png_uint_32 mmx_rowbytes_threshold) |
||
1155 | { |
||
1156 | png_ptr->mmx_bitdepth_threshold = mmx_bitdepth_threshold; |
||
1157 | png_ptr->mmx_rowbytes_threshold = mmx_rowbytes_threshold; |
||
1158 | } |
||
1159 | #endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */ |
||
1160 | #endif /* ?PNG_1_0_X */ |