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1 |
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2 /* pngget.c - retrieval of values from info struct |
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3 * |
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4 * Last changed in libpng 1.2.30 [August 15, 2008] |
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5 * For conditions of distribution and use, see copyright notice in png.h |
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6 * Copyright (c) 1998-2008 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 |
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11 #define PNG_INTERNAL |
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12 #include "png.h" |
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13 #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) |
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14 |
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15 png_uint_32 PNGAPI |
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16 png_get_valid(png_structp png_ptr, png_infop info_ptr, png_uint_32 flag) |
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17 { |
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18 if (png_ptr != NULL && info_ptr != NULL) |
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19 return(info_ptr->valid & flag); |
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20 else |
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21 return(0); |
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22 } |
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23 |
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24 png_uint_32 PNGAPI |
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25 png_get_rowbytes(png_structp png_ptr, png_infop info_ptr) |
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26 { |
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27 if (png_ptr != NULL && info_ptr != NULL) |
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28 return(info_ptr->rowbytes); |
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29 else |
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30 return(0); |
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31 } |
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32 |
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33 #if defined(PNG_INFO_IMAGE_SUPPORTED) |
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34 png_bytepp PNGAPI |
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35 png_get_rows(png_structp png_ptr, png_infop info_ptr) |
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36 { |
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37 if (png_ptr != NULL && info_ptr != NULL) |
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38 return(info_ptr->row_pointers); |
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39 else |
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40 return(0); |
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41 } |
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42 #endif |
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43 |
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44 #ifdef PNG_EASY_ACCESS_SUPPORTED |
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45 /* easy access to info, added in libpng-0.99 */ |
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46 png_uint_32 PNGAPI |
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47 png_get_image_width(png_structp png_ptr, png_infop info_ptr) |
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48 { |
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49 if (png_ptr != NULL && info_ptr != NULL) |
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50 { |
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51 return info_ptr->width; |
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52 } |
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53 return (0); |
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54 } |
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55 |
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56 png_uint_32 PNGAPI |
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57 png_get_image_height(png_structp png_ptr, png_infop info_ptr) |
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58 { |
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59 if (png_ptr != NULL && info_ptr != NULL) |
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60 { |
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61 return info_ptr->height; |
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62 } |
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63 return (0); |
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64 } |
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65 |
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66 png_byte PNGAPI |
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67 png_get_bit_depth(png_structp png_ptr, png_infop info_ptr) |
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68 { |
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69 if (png_ptr != NULL && info_ptr != NULL) |
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70 { |
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71 return info_ptr->bit_depth; |
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72 } |
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73 return (0); |
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74 } |
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75 |
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76 png_byte PNGAPI |
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77 png_get_color_type(png_structp png_ptr, png_infop info_ptr) |
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78 { |
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79 if (png_ptr != NULL && info_ptr != NULL) |
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80 { |
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81 return info_ptr->color_type; |
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82 } |
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83 return (0); |
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84 } |
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85 |
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86 png_byte PNGAPI |
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87 png_get_filter_type(png_structp png_ptr, png_infop info_ptr) |
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88 { |
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89 if (png_ptr != NULL && info_ptr != NULL) |
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90 { |
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91 return info_ptr->filter_type; |
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92 } |
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93 return (0); |
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94 } |
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95 |
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96 png_byte PNGAPI |
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97 png_get_interlace_type(png_structp png_ptr, png_infop info_ptr) |
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98 { |
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99 if (png_ptr != NULL && info_ptr != NULL) |
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100 { |
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101 return info_ptr->interlace_type; |
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102 } |
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103 return (0); |
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104 } |
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105 |
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106 png_byte PNGAPI |
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107 png_get_compression_type(png_structp png_ptr, png_infop info_ptr) |
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108 { |
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109 if (png_ptr != NULL && info_ptr != NULL) |
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110 { |
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111 return info_ptr->compression_type; |
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112 } |
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113 return (0); |
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114 } |
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115 |
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116 png_uint_32 PNGAPI |
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117 png_get_x_pixels_per_meter(png_structp png_ptr, png_infop info_ptr) |
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118 { |
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119 if (png_ptr != NULL && info_ptr != NULL) |
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120 #if defined(PNG_pHYs_SUPPORTED) |
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121 if (info_ptr->valid & PNG_INFO_pHYs) |
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122 { |
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123 png_debug1(1, "in %s retrieval function\n", "png_get_x_pixels_per_meter"); |
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124 if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER) |
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125 return (0); |
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126 else return (info_ptr->x_pixels_per_unit); |
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127 } |
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128 #else |
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129 return (0); |
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130 #endif |
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131 return (0); |
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132 } |
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133 |
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134 png_uint_32 PNGAPI |
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135 png_get_y_pixels_per_meter(png_structp png_ptr, png_infop info_ptr) |
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136 { |
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137 if (png_ptr != NULL && info_ptr != NULL) |
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138 #if defined(PNG_pHYs_SUPPORTED) |
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139 if (info_ptr->valid & PNG_INFO_pHYs) |
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140 { |
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141 png_debug1(1, "in %s retrieval function\n", "png_get_y_pixels_per_meter"); |
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142 if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER) |
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143 return (0); |
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144 else return (info_ptr->y_pixels_per_unit); |
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145 } |
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146 #else |
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147 return (0); |
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148 #endif |
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149 return (0); |
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150 } |
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151 |
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152 png_uint_32 PNGAPI |
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153 png_get_pixels_per_meter(png_structp png_ptr, png_infop info_ptr) |
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154 { |
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155 if (png_ptr != NULL && info_ptr != NULL) |
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156 #if defined(PNG_pHYs_SUPPORTED) |
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157 if (info_ptr->valid & PNG_INFO_pHYs) |
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158 { |
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159 png_debug1(1, "in %s retrieval function\n", "png_get_pixels_per_meter"); |
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160 if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER || |
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161 info_ptr->x_pixels_per_unit != info_ptr->y_pixels_per_unit) |
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162 return (0); |
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163 else return (info_ptr->x_pixels_per_unit); |
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164 } |
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165 #else |
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166 return (0); |
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167 #endif |
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168 return (0); |
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169 } |
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170 |
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171 #ifdef PNG_FLOATING_POINT_SUPPORTED |
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172 float PNGAPI |
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173 png_get_pixel_aspect_ratio(png_structp png_ptr, png_infop info_ptr) |
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174 { |
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175 if (png_ptr != NULL && info_ptr != NULL) |
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176 #if defined(PNG_pHYs_SUPPORTED) |
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177 if (info_ptr->valid & PNG_INFO_pHYs) |
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178 { |
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179 png_debug1(1, "in %s retrieval function\n", "png_get_aspect_ratio"); |
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180 if (info_ptr->x_pixels_per_unit == 0) |
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181 return ((float)0.0); |
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182 else |
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183 return ((float)((float)info_ptr->y_pixels_per_unit |
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184 /(float)info_ptr->x_pixels_per_unit)); |
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185 } |
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186 #else |
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187 return (0.0); |
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188 #endif |
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189 return ((float)0.0); |
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190 } |
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191 #endif |
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192 |
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193 png_int_32 PNGAPI |
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194 png_get_x_offset_microns(png_structp png_ptr, png_infop info_ptr) |
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195 { |
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196 if (png_ptr != NULL && info_ptr != NULL) |
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197 #if defined(PNG_oFFs_SUPPORTED) |
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198 if (info_ptr->valid & PNG_INFO_oFFs) |
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199 { |
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200 png_debug1(1, "in %s retrieval function\n", "png_get_x_offset_microns"); |
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201 if (info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER) |
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202 return (0); |
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203 else return (info_ptr->x_offset); |
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204 } |
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205 #else |
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206 return (0); |
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207 #endif |
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208 return (0); |
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209 } |
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210 |
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211 png_int_32 PNGAPI |
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212 png_get_y_offset_microns(png_structp png_ptr, png_infop info_ptr) |
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213 { |
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214 if (png_ptr != NULL && info_ptr != NULL) |
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215 #if defined(PNG_oFFs_SUPPORTED) |
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216 if (info_ptr->valid & PNG_INFO_oFFs) |
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217 { |
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218 png_debug1(1, "in %s retrieval function\n", "png_get_y_offset_microns"); |
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219 if (info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER) |
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220 return (0); |
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221 else return (info_ptr->y_offset); |
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222 } |
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223 #else |
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224 return (0); |
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225 #endif |
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226 return (0); |
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227 } |
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228 |
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229 png_int_32 PNGAPI |
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230 png_get_x_offset_pixels(png_structp png_ptr, png_infop info_ptr) |
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231 { |
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232 if (png_ptr != NULL && info_ptr != NULL) |
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233 #if defined(PNG_oFFs_SUPPORTED) |
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234 if (info_ptr->valid & PNG_INFO_oFFs) |
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235 { |
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236 png_debug1(1, "in %s retrieval function\n", "png_get_x_offset_microns"); |
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237 if (info_ptr->offset_unit_type != PNG_OFFSET_PIXEL) |
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238 return (0); |
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239 else return (info_ptr->x_offset); |
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240 } |
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241 #else |
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242 return (0); |
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243 #endif |
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244 return (0); |
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245 } |
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246 |
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247 png_int_32 PNGAPI |
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248 png_get_y_offset_pixels(png_structp png_ptr, png_infop info_ptr) |
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249 { |
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250 if (png_ptr != NULL && info_ptr != NULL) |
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251 #if defined(PNG_oFFs_SUPPORTED) |
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252 if (info_ptr->valid & PNG_INFO_oFFs) |
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253 { |
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254 png_debug1(1, "in %s retrieval function\n", "png_get_y_offset_microns"); |
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255 if (info_ptr->offset_unit_type != PNG_OFFSET_PIXEL) |
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256 return (0); |
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257 else return (info_ptr->y_offset); |
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258 } |
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259 #else |
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260 return (0); |
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261 #endif |
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262 return (0); |
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263 } |
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264 |
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265 #if defined(PNG_INCH_CONVERSIONS) && defined(PNG_FLOATING_POINT_SUPPORTED) |
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266 png_uint_32 PNGAPI |
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267 png_get_pixels_per_inch(png_structp png_ptr, png_infop info_ptr) |
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268 { |
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269 return ((png_uint_32)((float)png_get_pixels_per_meter(png_ptr, info_ptr) |
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270 *.0254 +.5)); |
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271 } |
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272 |
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273 png_uint_32 PNGAPI |
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274 png_get_x_pixels_per_inch(png_structp png_ptr, png_infop info_ptr) |
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275 { |
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276 return ((png_uint_32)((float)png_get_x_pixels_per_meter(png_ptr, info_ptr) |
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277 *.0254 +.5)); |
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278 } |
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279 |
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280 png_uint_32 PNGAPI |
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281 png_get_y_pixels_per_inch(png_structp png_ptr, png_infop info_ptr) |
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282 { |
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283 return ((png_uint_32)((float)png_get_y_pixels_per_meter(png_ptr, info_ptr) |
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284 *.0254 +.5)); |
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285 } |
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286 |
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287 float PNGAPI |
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288 png_get_x_offset_inches(png_structp png_ptr, png_infop info_ptr) |
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289 { |
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290 return ((float)png_get_x_offset_microns(png_ptr, info_ptr) |
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291 *.00003937); |
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292 } |
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293 |
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294 float PNGAPI |
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295 png_get_y_offset_inches(png_structp png_ptr, png_infop info_ptr) |
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296 { |
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297 return ((float)png_get_y_offset_microns(png_ptr, info_ptr) |
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298 *.00003937); |
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299 } |
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300 |
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301 #if defined(PNG_pHYs_SUPPORTED) |
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302 png_uint_32 PNGAPI |
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303 png_get_pHYs_dpi(png_structp png_ptr, png_infop info_ptr, |
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304 png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type) |
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305 { |
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306 png_uint_32 retval = 0; |
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307 |
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308 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) |
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309 { |
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310 png_debug1(1, "in %s retrieval function\n", "pHYs"); |
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311 if (res_x != NULL) |
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312 { |
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313 *res_x = info_ptr->x_pixels_per_unit; |
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314 retval |= PNG_INFO_pHYs; |
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315 } |
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316 if (res_y != NULL) |
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317 { |
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318 *res_y = info_ptr->y_pixels_per_unit; |
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319 retval |= PNG_INFO_pHYs; |
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320 } |
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321 if (unit_type != NULL) |
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322 { |
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323 *unit_type = (int)info_ptr->phys_unit_type; |
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324 retval |= PNG_INFO_pHYs; |
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325 if (*unit_type == 1) |
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326 { |
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327 if (res_x != NULL) *res_x = (png_uint_32)(*res_x * .0254 + .50); |
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328 if (res_y != NULL) *res_y = (png_uint_32)(*res_y * .0254 + .50); |
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329 } |
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330 } |
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331 } |
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332 return (retval); |
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333 } |
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334 #endif /* PNG_pHYs_SUPPORTED */ |
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335 #endif /* PNG_INCH_CONVERSIONS && PNG_FLOATING_POINT_SUPPORTED */ |
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336 |
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337 /* png_get_channels really belongs in here, too, but it's been around longer */ |
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338 |
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339 #endif /* PNG_EASY_ACCESS_SUPPORTED */ |
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340 |
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341 png_byte PNGAPI |
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342 png_get_channels(png_structp png_ptr, png_infop info_ptr) |
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343 { |
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344 if (png_ptr != NULL && info_ptr != NULL) |
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345 return(info_ptr->channels); |
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346 else |
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347 return (0); |
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348 } |
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349 |
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350 png_bytep PNGAPI |
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351 png_get_signature(png_structp png_ptr, png_infop info_ptr) |
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352 { |
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353 if (png_ptr != NULL && info_ptr != NULL) |
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354 return(info_ptr->signature); |
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355 else |
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356 return (NULL); |
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357 } |
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358 |
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359 #if defined(PNG_bKGD_SUPPORTED) |
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360 png_uint_32 PNGAPI |
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361 png_get_bKGD(png_structp png_ptr, png_infop info_ptr, |
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362 png_color_16p *background) |
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363 { |
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364 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD) |
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365 && background != NULL) |
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366 { |
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367 png_debug1(1, "in %s retrieval function\n", "bKGD"); |
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368 *background = &(info_ptr->background); |
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369 return (PNG_INFO_bKGD); |
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370 } |
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371 return (0); |
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372 } |
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373 #endif |
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374 |
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375 #if defined(PNG_cHRM_SUPPORTED) |
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376 #ifdef PNG_FLOATING_POINT_SUPPORTED |
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377 png_uint_32 PNGAPI |
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378 png_get_cHRM(png_structp png_ptr, png_infop info_ptr, |
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379 double *white_x, double *white_y, double *red_x, double *red_y, |
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380 double *green_x, double *green_y, double *blue_x, double *blue_y) |
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381 { |
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382 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)) |
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383 { |
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384 png_debug1(1, "in %s retrieval function\n", "cHRM"); |
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385 if (white_x != NULL) |
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386 *white_x = (double)info_ptr->x_white; |
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387 if (white_y != NULL) |
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388 *white_y = (double)info_ptr->y_white; |
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389 if (red_x != NULL) |
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390 *red_x = (double)info_ptr->x_red; |
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391 if (red_y != NULL) |
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392 *red_y = (double)info_ptr->y_red; |
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393 if (green_x != NULL) |
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394 *green_x = (double)info_ptr->x_green; |
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395 if (green_y != NULL) |
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396 *green_y = (double)info_ptr->y_green; |
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397 if (blue_x != NULL) |
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398 *blue_x = (double)info_ptr->x_blue; |
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399 if (blue_y != NULL) |
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400 *blue_y = (double)info_ptr->y_blue; |
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401 return (PNG_INFO_cHRM); |
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402 } |
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403 return (0); |
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404 } |
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405 #endif |
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406 #ifdef PNG_FIXED_POINT_SUPPORTED |
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407 png_uint_32 PNGAPI |
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408 png_get_cHRM_fixed(png_structp png_ptr, png_infop info_ptr, |
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409 png_fixed_point *white_x, png_fixed_point *white_y, png_fixed_point *red_x, |
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410 png_fixed_point *red_y, png_fixed_point *green_x, png_fixed_point *green_y, |
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411 png_fixed_point *blue_x, png_fixed_point *blue_y) |
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412 { |
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413 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)) |
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414 { |
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415 png_debug1(1, "in %s retrieval function\n", "cHRM"); |
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416 if (white_x != NULL) |
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417 *white_x = info_ptr->int_x_white; |
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418 if (white_y != NULL) |
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419 *white_y = info_ptr->int_y_white; |
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420 if (red_x != NULL) |
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421 *red_x = info_ptr->int_x_red; |
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422 if (red_y != NULL) |
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423 *red_y = info_ptr->int_y_red; |
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424 if (green_x != NULL) |
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425 *green_x = info_ptr->int_x_green; |
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426 if (green_y != NULL) |
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427 *green_y = info_ptr->int_y_green; |
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428 if (blue_x != NULL) |
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429 *blue_x = info_ptr->int_x_blue; |
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430 if (blue_y != NULL) |
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431 *blue_y = info_ptr->int_y_blue; |
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432 return (PNG_INFO_cHRM); |
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433 } |
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434 return (0); |
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435 } |
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436 #endif |
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437 #endif |
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438 |
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439 #if defined(PNG_gAMA_SUPPORTED) |
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440 #ifdef PNG_FLOATING_POINT_SUPPORTED |
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441 png_uint_32 PNGAPI |
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442 png_get_gAMA(png_structp png_ptr, png_infop info_ptr, double *file_gamma) |
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443 { |
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444 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA) |
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445 && file_gamma != NULL) |
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446 { |
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447 png_debug1(1, "in %s retrieval function\n", "gAMA"); |
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448 *file_gamma = (double)info_ptr->gamma; |
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449 return (PNG_INFO_gAMA); |
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450 } |
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451 return (0); |
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452 } |
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453 #endif |
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454 #ifdef PNG_FIXED_POINT_SUPPORTED |
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455 png_uint_32 PNGAPI |
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456 png_get_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, |
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457 png_fixed_point *int_file_gamma) |
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458 { |
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459 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA) |
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460 && int_file_gamma != NULL) |
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461 { |
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462 png_debug1(1, "in %s retrieval function\n", "gAMA"); |
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463 *int_file_gamma = info_ptr->int_gamma; |
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464 return (PNG_INFO_gAMA); |
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465 } |
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466 return (0); |
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467 } |
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468 #endif |
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469 #endif |
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470 |
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471 #if defined(PNG_sRGB_SUPPORTED) |
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472 png_uint_32 PNGAPI |
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473 png_get_sRGB(png_structp png_ptr, png_infop info_ptr, int *file_srgb_intent) |
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474 { |
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475 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB) |
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476 && file_srgb_intent != NULL) |
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477 { |
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478 png_debug1(1, "in %s retrieval function\n", "sRGB"); |
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479 *file_srgb_intent = (int)info_ptr->srgb_intent; |
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480 return (PNG_INFO_sRGB); |
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481 } |
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482 return (0); |
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483 } |
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484 #endif |
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485 |
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486 #if defined(PNG_iCCP_SUPPORTED) |
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487 png_uint_32 PNGAPI |
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488 png_get_iCCP(png_structp png_ptr, png_infop info_ptr, |
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489 png_charpp name, int *compression_type, |
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490 png_charpp profile, png_uint_32 *proflen) |
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491 { |
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492 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_iCCP) |
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493 && name != NULL && profile != NULL && proflen != NULL) |
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494 { |
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495 png_debug1(1, "in %s retrieval function\n", "iCCP"); |
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496 *name = info_ptr->iccp_name; |
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497 *profile = info_ptr->iccp_profile; |
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498 /* compression_type is a dummy so the API won't have to change |
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499 if we introduce multiple compression types later. */ |
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500 *proflen = (int)info_ptr->iccp_proflen; |
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501 *compression_type = (int)info_ptr->iccp_compression; |
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502 return (PNG_INFO_iCCP); |
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503 } |
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504 return (0); |
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505 } |
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506 #endif |
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507 |
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508 #if defined(PNG_sPLT_SUPPORTED) |
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509 png_uint_32 PNGAPI |
|
510 png_get_sPLT(png_structp png_ptr, png_infop info_ptr, |
|
511 png_sPLT_tpp spalettes) |
|
512 { |
|
513 if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL) |
|
514 { |
|
515 *spalettes = info_ptr->splt_palettes; |
|
516 return ((png_uint_32)info_ptr->splt_palettes_num); |
|
517 } |
|
518 return (0); |
|
519 } |
|
520 #endif |
|
521 |
|
522 #if defined(PNG_hIST_SUPPORTED) |
|
523 png_uint_32 PNGAPI |
|
524 png_get_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p *hist) |
|
525 { |
|
526 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST) |
|
527 && hist != NULL) |
|
528 { |
|
529 png_debug1(1, "in %s retrieval function\n", "hIST"); |
|
530 *hist = info_ptr->hist; |
|
531 return (PNG_INFO_hIST); |
|
532 } |
|
533 return (0); |
|
534 } |
|
535 #endif |
|
536 |
|
537 png_uint_32 PNGAPI |
|
538 png_get_IHDR(png_structp png_ptr, png_infop info_ptr, |
|
539 png_uint_32 *width, png_uint_32 *height, int *bit_depth, |
|
540 int *color_type, int *interlace_type, int *compression_type, |
|
541 int *filter_type) |
|
542 |
|
543 { |
|
544 if (png_ptr != NULL && info_ptr != NULL && width != NULL && height != NULL && |
|
545 bit_depth != NULL && color_type != NULL) |
|
546 { |
|
547 png_debug1(1, "in %s retrieval function\n", "IHDR"); |
|
548 *width = info_ptr->width; |
|
549 *height = info_ptr->height; |
|
550 *bit_depth = info_ptr->bit_depth; |
|
551 if (info_ptr->bit_depth < 1 || info_ptr->bit_depth > 16) |
|
552 png_error(png_ptr, "Invalid bit depth"); |
|
553 *color_type = info_ptr->color_type; |
|
554 if (info_ptr->color_type > 6) |
|
555 png_error(png_ptr, "Invalid color type"); |
|
556 if (compression_type != NULL) |
|
557 *compression_type = info_ptr->compression_type; |
|
558 if (filter_type != NULL) |
|
559 *filter_type = info_ptr->filter_type; |
|
560 if (interlace_type != NULL) |
|
561 *interlace_type = info_ptr->interlace_type; |
|
562 |
|
563 /* check for potential overflow of rowbytes */ |
|
564 if (*width == 0 || *width > PNG_UINT_31_MAX) |
|
565 png_error(png_ptr, "Invalid image width"); |
|
566 if (*height == 0 || *height > PNG_UINT_31_MAX) |
|
567 png_error(png_ptr, "Invalid image height"); |
|
568 if (info_ptr->width > (PNG_UINT_32_MAX |
|
569 >> 3) /* 8-byte RGBA pixels */ |
|
570 - 64 /* bigrowbuf hack */ |
|
571 - 1 /* filter byte */ |
|
572 - 7*8 /* rounding of width to multiple of 8 pixels */ |
|
573 - 8) /* extra max_pixel_depth pad */ |
|
574 { |
|
575 png_warning(png_ptr, |
|
576 "Width too large for libpng to process image data."); |
|
577 } |
|
578 return (1); |
|
579 } |
|
580 return (0); |
|
581 } |
|
582 |
|
583 #if defined(PNG_oFFs_SUPPORTED) |
|
584 png_uint_32 PNGAPI |
|
585 png_get_oFFs(png_structp png_ptr, png_infop info_ptr, |
|
586 png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type) |
|
587 { |
|
588 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs) |
|
589 && offset_x != NULL && offset_y != NULL && unit_type != NULL) |
|
590 { |
|
591 png_debug1(1, "in %s retrieval function\n", "oFFs"); |
|
592 *offset_x = info_ptr->x_offset; |
|
593 *offset_y = info_ptr->y_offset; |
|
594 *unit_type = (int)info_ptr->offset_unit_type; |
|
595 return (PNG_INFO_oFFs); |
|
596 } |
|
597 return (0); |
|
598 } |
|
599 #endif |
|
600 |
|
601 #if defined(PNG_pCAL_SUPPORTED) |
|
602 png_uint_32 PNGAPI |
|
603 png_get_pCAL(png_structp png_ptr, png_infop info_ptr, |
|
604 png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams, |
|
605 png_charp *units, png_charpp *params) |
|
606 { |
|
607 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL) |
|
608 && purpose != NULL && X0 != NULL && X1 != NULL && type != NULL && |
|
609 nparams != NULL && units != NULL && params != NULL) |
|
610 { |
|
611 png_debug1(1, "in %s retrieval function\n", "pCAL"); |
|
612 *purpose = info_ptr->pcal_purpose; |
|
613 *X0 = info_ptr->pcal_X0; |
|
614 *X1 = info_ptr->pcal_X1; |
|
615 *type = (int)info_ptr->pcal_type; |
|
616 *nparams = (int)info_ptr->pcal_nparams; |
|
617 *units = info_ptr->pcal_units; |
|
618 *params = info_ptr->pcal_params; |
|
619 return (PNG_INFO_pCAL); |
|
620 } |
|
621 return (0); |
|
622 } |
|
623 #endif |
|
624 |
|
625 #if defined(PNG_sCAL_SUPPORTED) |
|
626 #ifdef PNG_FLOATING_POINT_SUPPORTED |
|
627 png_uint_32 PNGAPI |
|
628 png_get_sCAL(png_structp png_ptr, png_infop info_ptr, |
|
629 int *unit, double *width, double *height) |
|
630 { |
|
631 if (png_ptr != NULL && info_ptr != NULL && |
|
632 (info_ptr->valid & PNG_INFO_sCAL)) |
|
633 { |
|
634 *unit = info_ptr->scal_unit; |
|
635 *width = info_ptr->scal_pixel_width; |
|
636 *height = info_ptr->scal_pixel_height; |
|
637 return (PNG_INFO_sCAL); |
|
638 } |
|
639 return(0); |
|
640 } |
|
641 #else |
|
642 #ifdef PNG_FIXED_POINT_SUPPORTED |
|
643 png_uint_32 PNGAPI |
|
644 png_get_sCAL_s(png_structp png_ptr, png_infop info_ptr, |
|
645 int *unit, png_charpp width, png_charpp height) |
|
646 { |
|
647 if (png_ptr != NULL && info_ptr != NULL && |
|
648 (info_ptr->valid & PNG_INFO_sCAL)) |
|
649 { |
|
650 *unit = info_ptr->scal_unit; |
|
651 *width = info_ptr->scal_s_width; |
|
652 *height = info_ptr->scal_s_height; |
|
653 return (PNG_INFO_sCAL); |
|
654 } |
|
655 return(0); |
|
656 } |
|
657 #endif |
|
658 #endif |
|
659 #endif |
|
660 |
|
661 #if defined(PNG_pHYs_SUPPORTED) |
|
662 png_uint_32 PNGAPI |
|
663 png_get_pHYs(png_structp png_ptr, png_infop info_ptr, |
|
664 png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type) |
|
665 { |
|
666 png_uint_32 retval = 0; |
|
667 |
|
668 if (png_ptr != NULL && info_ptr != NULL && |
|
669 (info_ptr->valid & PNG_INFO_pHYs)) |
|
670 { |
|
671 png_debug1(1, "in %s retrieval function\n", "pHYs"); |
|
672 if (res_x != NULL) |
|
673 { |
|
674 *res_x = info_ptr->x_pixels_per_unit; |
|
675 retval |= PNG_INFO_pHYs; |
|
676 } |
|
677 if (res_y != NULL) |
|
678 { |
|
679 *res_y = info_ptr->y_pixels_per_unit; |
|
680 retval |= PNG_INFO_pHYs; |
|
681 } |
|
682 if (unit_type != NULL) |
|
683 { |
|
684 *unit_type = (int)info_ptr->phys_unit_type; |
|
685 retval |= PNG_INFO_pHYs; |
|
686 } |
|
687 } |
|
688 return (retval); |
|
689 } |
|
690 #endif |
|
691 |
|
692 png_uint_32 PNGAPI |
|
693 png_get_PLTE(png_structp png_ptr, png_infop info_ptr, png_colorp *palette, |
|
694 int *num_palette) |
|
695 { |
|
696 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_PLTE) |
|
697 && palette != NULL) |
|
698 { |
|
699 png_debug1(1, "in %s retrieval function\n", "PLTE"); |
|
700 *palette = info_ptr->palette; |
|
701 *num_palette = info_ptr->num_palette; |
|
702 png_debug1(3, "num_palette = %d\n", *num_palette); |
|
703 return (PNG_INFO_PLTE); |
|
704 } |
|
705 return (0); |
|
706 } |
|
707 |
|
708 #if defined(PNG_sBIT_SUPPORTED) |
|
709 png_uint_32 PNGAPI |
|
710 png_get_sBIT(png_structp png_ptr, png_infop info_ptr, png_color_8p *sig_bit) |
|
711 { |
|
712 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT) |
|
713 && sig_bit != NULL) |
|
714 { |
|
715 png_debug1(1, "in %s retrieval function\n", "sBIT"); |
|
716 *sig_bit = &(info_ptr->sig_bit); |
|
717 return (PNG_INFO_sBIT); |
|
718 } |
|
719 return (0); |
|
720 } |
|
721 #endif |
|
722 |
|
723 #if defined(PNG_TEXT_SUPPORTED) |
|
724 png_uint_32 PNGAPI |
|
725 png_get_text(png_structp png_ptr, png_infop info_ptr, png_textp *text_ptr, |
|
726 int *num_text) |
|
727 { |
|
728 if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0) |
|
729 { |
|
730 png_debug1(1, "in %s retrieval function\n", |
|
731 (png_ptr->chunk_name[0] == '\0' ? "text" |
|
732 : (png_const_charp)png_ptr->chunk_name)); |
|
733 if (text_ptr != NULL) |
|
734 *text_ptr = info_ptr->text; |
|
735 if (num_text != NULL) |
|
736 *num_text = info_ptr->num_text; |
|
737 return ((png_uint_32)info_ptr->num_text); |
|
738 } |
|
739 if (num_text != NULL) |
|
740 *num_text = 0; |
|
741 return(0); |
|
742 } |
|
743 #endif |
|
744 |
|
745 #if defined(PNG_tIME_SUPPORTED) |
|
746 png_uint_32 PNGAPI |
|
747 png_get_tIME(png_structp png_ptr, png_infop info_ptr, png_timep *mod_time) |
|
748 { |
|
749 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME) |
|
750 && mod_time != NULL) |
|
751 { |
|
752 png_debug1(1, "in %s retrieval function\n", "tIME"); |
|
753 *mod_time = &(info_ptr->mod_time); |
|
754 return (PNG_INFO_tIME); |
|
755 } |
|
756 return (0); |
|
757 } |
|
758 #endif |
|
759 |
|
760 #if defined(PNG_tRNS_SUPPORTED) |
|
761 png_uint_32 PNGAPI |
|
762 png_get_tRNS(png_structp png_ptr, png_infop info_ptr, |
|
763 png_bytep *trans, int *num_trans, png_color_16p *trans_values) |
|
764 { |
|
765 png_uint_32 retval = 0; |
|
766 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS)) |
|
767 { |
|
768 png_debug1(1, "in %s retrieval function\n", "tRNS"); |
|
769 if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) |
|
770 { |
|
771 if (trans != NULL) |
|
772 { |
|
773 *trans = info_ptr->trans; |
|
774 retval |= PNG_INFO_tRNS; |
|
775 } |
|
776 if (trans_values != NULL) |
|
777 *trans_values = &(info_ptr->trans_values); |
|
778 } |
|
779 else /* if (info_ptr->color_type != PNG_COLOR_TYPE_PALETTE) */ |
|
780 { |
|
781 if (trans_values != NULL) |
|
782 { |
|
783 *trans_values = &(info_ptr->trans_values); |
|
784 retval |= PNG_INFO_tRNS; |
|
785 } |
|
786 if (trans != NULL) |
|
787 *trans = NULL; |
|
788 } |
|
789 if (num_trans != NULL) |
|
790 { |
|
791 *num_trans = info_ptr->num_trans; |
|
792 retval |= PNG_INFO_tRNS; |
|
793 } |
|
794 } |
|
795 return (retval); |
|
796 } |
|
797 #endif |
|
798 |
|
799 #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) |
|
800 png_uint_32 PNGAPI |
|
801 png_get_unknown_chunks(png_structp png_ptr, png_infop info_ptr, |
|
802 png_unknown_chunkpp unknowns) |
|
803 { |
|
804 if (png_ptr != NULL && info_ptr != NULL && unknowns != NULL) |
|
805 { |
|
806 *unknowns = info_ptr->unknown_chunks; |
|
807 return ((png_uint_32)info_ptr->unknown_chunks_num); |
|
808 } |
|
809 return (0); |
|
810 } |
|
811 #endif |
|
812 |
|
813 #if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) |
|
814 png_byte PNGAPI |
|
815 png_get_rgb_to_gray_status (png_structp png_ptr) |
|
816 { |
|
817 return (png_byte)(png_ptr? png_ptr->rgb_to_gray_status : 0); |
|
818 } |
|
819 #endif |
|
820 |
|
821 #if defined(PNG_USER_CHUNKS_SUPPORTED) |
|
822 png_voidp PNGAPI |
|
823 png_get_user_chunk_ptr(png_structp png_ptr) |
|
824 { |
|
825 return (png_ptr? png_ptr->user_chunk_ptr : NULL); |
|
826 } |
|
827 #endif |
|
828 |
|
829 #ifdef PNG_WRITE_SUPPORTED |
|
830 png_uint_32 PNGAPI |
|
831 png_get_compression_buffer_size(png_structp png_ptr) |
|
832 { |
|
833 return (png_uint_32)(png_ptr? png_ptr->zbuf_size : 0L); |
|
834 } |
|
835 #endif |
|
836 |
|
837 #ifdef PNG_ASSEMBLER_CODE_SUPPORTED |
|
838 #ifndef PNG_1_0_X |
|
839 /* this function was added to libpng 1.2.0 and should exist by default */ |
|
840 png_uint_32 PNGAPI |
|
841 png_get_asm_flags (png_structp png_ptr) |
|
842 { |
|
843 /* obsolete, to be removed from libpng-1.4.0 */ |
|
844 return (png_ptr? 0L: 0L); |
|
845 } |
|
846 |
|
847 /* this function was added to libpng 1.2.0 and should exist by default */ |
|
848 png_uint_32 PNGAPI |
|
849 png_get_asm_flagmask (int flag_select) |
|
850 { |
|
851 /* obsolete, to be removed from libpng-1.4.0 */ |
|
852 flag_select=flag_select; |
|
853 return 0L; |
|
854 } |
|
855 |
|
856 /* GRR: could add this: && defined(PNG_MMX_CODE_SUPPORTED) */ |
|
857 /* this function was added to libpng 1.2.0 */ |
|
858 png_uint_32 PNGAPI |
|
859 png_get_mmx_flagmask (int flag_select, int *compilerID) |
|
860 { |
|
861 /* obsolete, to be removed from libpng-1.4.0 */ |
|
862 flag_select=flag_select; |
|
863 *compilerID = -1; /* unknown (i.e., no asm/MMX code compiled) */ |
|
864 return 0L; |
|
865 } |
|
866 |
|
867 /* this function was added to libpng 1.2.0 */ |
|
868 png_byte PNGAPI |
|
869 png_get_mmx_bitdepth_threshold (png_structp png_ptr) |
|
870 { |
|
871 /* obsolete, to be removed from libpng-1.4.0 */ |
|
872 return (png_ptr? 0: 0); |
|
873 } |
|
874 |
|
875 /* this function was added to libpng 1.2.0 */ |
|
876 png_uint_32 PNGAPI |
|
877 png_get_mmx_rowbytes_threshold (png_structp png_ptr) |
|
878 { |
|
879 /* obsolete, to be removed from libpng-1.4.0 */ |
|
880 return (png_ptr? 0L: 0L); |
|
881 } |
|
882 #endif /* ?PNG_1_0_X */ |
|
883 #endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */ |
|
884 |
|
885 #ifdef PNG_SET_USER_LIMITS_SUPPORTED |
|
886 /* these functions were added to libpng 1.2.6 */ |
|
887 png_uint_32 PNGAPI |
|
888 png_get_user_width_max (png_structp png_ptr) |
|
889 { |
|
890 return (png_ptr? png_ptr->user_width_max : 0); |
|
891 } |
|
892 png_uint_32 PNGAPI |
|
893 png_get_user_height_max (png_structp png_ptr) |
|
894 { |
|
895 return (png_ptr? png_ptr->user_height_max : 0); |
|
896 } |
|
897 #endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */ |
|
898 |
|
899 |
|
900 #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ |