2 /* pngset.c - storage of image information into info struct
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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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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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16 #define PNG_INTERNAL
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18 #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
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20 #if defined(PNG_bKGD_SUPPORTED)
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22 png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background)
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24 png_debug1(1, "in %s storage function\n", "bKGD");
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25 if (png_ptr == NULL || info_ptr == NULL)
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28 png_memcpy(&(info_ptr->background), background, png_sizeof(png_color_16));
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29 info_ptr->valid |= PNG_INFO_bKGD;
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33 #if defined(PNG_cHRM_SUPPORTED)
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34 #ifdef PNG_FLOATING_POINT_SUPPORTED
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36 png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
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37 double white_x, double white_y, double red_x, double red_y,
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38 double green_x, double green_y, double blue_x, double blue_y)
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40 png_debug1(1, "in %s storage function\n", "cHRM");
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41 if (png_ptr == NULL || info_ptr == NULL)
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43 if (!(white_x || white_y || red_x || red_y || green_x || green_y ||
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46 png_warning(png_ptr,
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47 "Ignoring attempt to set all-zero chromaticity values");
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50 if (white_x < 0.0 || white_y < 0.0 ||
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51 red_x < 0.0 || red_y < 0.0 ||
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52 green_x < 0.0 || green_y < 0.0 ||
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53 blue_x < 0.0 || blue_y < 0.0)
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55 png_warning(png_ptr,
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56 "Ignoring attempt to set negative chromaticity value");
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59 if (white_x > 21474.83 || white_y > 21474.83 ||
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60 red_x > 21474.83 || red_y > 21474.83 ||
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61 green_x > 21474.83 || green_y > 21474.83 ||
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62 blue_x > 21474.83 || blue_y > 21474.83)
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64 png_warning(png_ptr,
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65 "Ignoring attempt to set chromaticity value exceeding 21474.83");
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69 info_ptr->x_white = (float)white_x;
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70 info_ptr->y_white = (float)white_y;
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71 info_ptr->x_red = (float)red_x;
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72 info_ptr->y_red = (float)red_y;
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73 info_ptr->x_green = (float)green_x;
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74 info_ptr->y_green = (float)green_y;
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75 info_ptr->x_blue = (float)blue_x;
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76 info_ptr->y_blue = (float)blue_y;
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77 #ifdef PNG_FIXED_POINT_SUPPORTED
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78 info_ptr->int_x_white = (png_fixed_point)(white_x*100000.+0.5);
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79 info_ptr->int_y_white = (png_fixed_point)(white_y*100000.+0.5);
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80 info_ptr->int_x_red = (png_fixed_point)( red_x*100000.+0.5);
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81 info_ptr->int_y_red = (png_fixed_point)( red_y*100000.+0.5);
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82 info_ptr->int_x_green = (png_fixed_point)(green_x*100000.+0.5);
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83 info_ptr->int_y_green = (png_fixed_point)(green_y*100000.+0.5);
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84 info_ptr->int_x_blue = (png_fixed_point)( blue_x*100000.+0.5);
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85 info_ptr->int_y_blue = (png_fixed_point)( blue_y*100000.+0.5);
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87 info_ptr->valid |= PNG_INFO_cHRM;
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90 #ifdef PNG_FIXED_POINT_SUPPORTED
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92 png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
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93 png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x,
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94 png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y,
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95 png_fixed_point blue_x, png_fixed_point blue_y)
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97 png_debug1(1, "in %s storage function\n", "cHRM");
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98 if (png_ptr == NULL || info_ptr == NULL)
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101 if (!(white_x || white_y || red_x || red_y || green_x || green_y ||
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104 png_warning(png_ptr,
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105 "Ignoring attempt to set all-zero chromaticity values");
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108 if (white_x < 0 || white_y < 0 ||
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109 red_x < 0 || red_y < 0 ||
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110 green_x < 0 || green_y < 0 ||
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111 blue_x < 0 || blue_y < 0)
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113 png_warning(png_ptr,
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114 "Ignoring attempt to set negative chromaticity value");
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117 if (white_x > (png_fixed_point) PNG_UINT_31_MAX ||
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118 white_y > (png_fixed_point) PNG_UINT_31_MAX ||
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119 red_x > (png_fixed_point) PNG_UINT_31_MAX ||
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120 red_y > (png_fixed_point) PNG_UINT_31_MAX ||
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121 green_x > (png_fixed_point) PNG_UINT_31_MAX ||
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122 green_y > (png_fixed_point) PNG_UINT_31_MAX ||
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123 blue_x > (png_fixed_point) PNG_UINT_31_MAX ||
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124 blue_y > (png_fixed_point) PNG_UINT_31_MAX )
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126 png_warning(png_ptr,
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127 "Ignoring attempt to set chromaticity value exceeding 21474.83");
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130 info_ptr->int_x_white = white_x;
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131 info_ptr->int_y_white = white_y;
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132 info_ptr->int_x_red = red_x;
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133 info_ptr->int_y_red = red_y;
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134 info_ptr->int_x_green = green_x;
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135 info_ptr->int_y_green = green_y;
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136 info_ptr->int_x_blue = blue_x;
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137 info_ptr->int_y_blue = blue_y;
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138 #ifdef PNG_FLOATING_POINT_SUPPORTED
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139 info_ptr->x_white = (float)(white_x/100000.);
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140 info_ptr->y_white = (float)(white_y/100000.);
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141 info_ptr->x_red = (float)( red_x/100000.);
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142 info_ptr->y_red = (float)( red_y/100000.);
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143 info_ptr->x_green = (float)(green_x/100000.);
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144 info_ptr->y_green = (float)(green_y/100000.);
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145 info_ptr->x_blue = (float)( blue_x/100000.);
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146 info_ptr->y_blue = (float)( blue_y/100000.);
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148 info_ptr->valid |= PNG_INFO_cHRM;
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153 #if defined(PNG_gAMA_SUPPORTED)
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154 #ifdef PNG_FLOATING_POINT_SUPPORTED
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156 png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
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159 png_debug1(1, "in %s storage function\n", "gAMA");
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160 if (png_ptr == NULL || info_ptr == NULL)
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163 /* Check for overflow */
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164 if (file_gamma > 21474.83)
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166 png_warning(png_ptr, "Limiting gamma to 21474.83");
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170 gamma = file_gamma;
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171 info_ptr->gamma = (float)gamma;
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172 #ifdef PNG_FIXED_POINT_SUPPORTED
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173 info_ptr->int_gamma = (int)(gamma*100000.+.5);
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175 info_ptr->valid |= PNG_INFO_gAMA;
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177 png_warning(png_ptr, "Setting gamma=0");
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181 png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point
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184 png_fixed_point gamma;
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186 png_debug1(1, "in %s storage function\n", "gAMA");
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187 if (png_ptr == NULL || info_ptr == NULL)
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190 if (int_gamma > (png_fixed_point) PNG_UINT_31_MAX)
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192 png_warning(png_ptr, "Limiting gamma to 21474.83");
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193 gamma=PNG_UINT_31_MAX;
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199 png_warning(png_ptr, "Setting negative gamma to zero");
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205 #ifdef PNG_FLOATING_POINT_SUPPORTED
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206 info_ptr->gamma = (float)(gamma/100000.);
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208 #ifdef PNG_FIXED_POINT_SUPPORTED
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209 info_ptr->int_gamma = gamma;
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211 info_ptr->valid |= PNG_INFO_gAMA;
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213 png_warning(png_ptr, "Setting gamma=0");
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217 #if defined(PNG_hIST_SUPPORTED)
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219 png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
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223 png_debug1(1, "in %s storage function\n", "hIST");
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224 if (png_ptr == NULL || info_ptr == NULL)
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226 if (info_ptr->num_palette == 0 || info_ptr->num_palette
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227 > PNG_MAX_PALETTE_LENGTH)
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229 png_warning(png_ptr,
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230 "Invalid palette size, hIST allocation skipped.");
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234 #ifdef PNG_FREE_ME_SUPPORTED
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235 png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
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237 /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in version
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239 png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr,
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240 (png_uint_32)(PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16)));
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241 if (png_ptr->hist == NULL)
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243 png_warning(png_ptr, "Insufficient memory for hIST chunk data.");
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247 for (i = 0; i < info_ptr->num_palette; i++)
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248 png_ptr->hist[i] = hist[i];
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249 info_ptr->hist = png_ptr->hist;
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250 info_ptr->valid |= PNG_INFO_hIST;
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252 #ifdef PNG_FREE_ME_SUPPORTED
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253 info_ptr->free_me |= PNG_FREE_HIST;
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255 png_ptr->flags |= PNG_FLAG_FREE_HIST;
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261 png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
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262 png_uint_32 width, png_uint_32 height, int bit_depth,
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263 int color_type, int interlace_type, int compression_type,
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266 png_debug1(1, "in %s storage function\n", "IHDR");
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267 if (png_ptr == NULL || info_ptr == NULL)
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270 /* check for width and height valid values */
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271 if (width == 0 || height == 0)
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272 png_error(png_ptr, "Image width or height is zero in IHDR");
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273 #ifdef PNG_SET_USER_LIMITS_SUPPORTED
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274 if (width > png_ptr->user_width_max || height > png_ptr->user_height_max)
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275 png_error(png_ptr, "image size exceeds user limits in IHDR");
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277 if (width > PNG_USER_WIDTH_MAX || height > PNG_USER_HEIGHT_MAX)
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278 png_error(png_ptr, "image size exceeds user limits in IHDR");
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280 if (width > PNG_UINT_31_MAX || height > PNG_UINT_31_MAX)
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281 png_error(png_ptr, "Invalid image size in IHDR");
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282 if ( width > (PNG_UINT_32_MAX
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283 >> 3) /* 8-byte RGBA pixels */
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284 - 64 /* bigrowbuf hack */
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285 - 1 /* filter byte */
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286 - 7*8 /* rounding of width to multiple of 8 pixels */
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287 - 8) /* extra max_pixel_depth pad */
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288 png_warning(png_ptr, "Width is too large for libpng to process pixels");
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290 /* check other values */
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291 if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 &&
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292 bit_depth != 8 && bit_depth != 16)
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293 png_error(png_ptr, "Invalid bit depth in IHDR");
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295 if (color_type < 0 || color_type == 1 ||
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296 color_type == 5 || color_type > 6)
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297 png_error(png_ptr, "Invalid color type in IHDR");
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299 if (((color_type == PNG_COLOR_TYPE_PALETTE) && bit_depth > 8) ||
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300 ((color_type == PNG_COLOR_TYPE_RGB ||
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301 color_type == PNG_COLOR_TYPE_GRAY_ALPHA ||
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302 color_type == PNG_COLOR_TYPE_RGB_ALPHA) && bit_depth < 8))
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303 png_error(png_ptr, "Invalid color type/bit depth combination in IHDR");
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305 if (interlace_type >= PNG_INTERLACE_LAST)
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306 png_error(png_ptr, "Unknown interlace method in IHDR");
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308 if (compression_type != PNG_COMPRESSION_TYPE_BASE)
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309 png_error(png_ptr, "Unknown compression method in IHDR");
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311 #if defined(PNG_MNG_FEATURES_SUPPORTED)
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312 /* Accept filter_method 64 (intrapixel differencing) only if
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313 * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and
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314 * 2. Libpng did not read a PNG signature (this filter_method is only
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315 * used in PNG datastreams that are embedded in MNG datastreams) and
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316 * 3. The application called png_permit_mng_features with a mask that
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317 * included PNG_FLAG_MNG_FILTER_64 and
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318 * 4. The filter_method is 64 and
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319 * 5. The color_type is RGB or RGBA
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321 if ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&png_ptr->mng_features_permitted)
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322 png_warning(png_ptr, "MNG features are not allowed in a PNG datastream");
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323 if (filter_type != PNG_FILTER_TYPE_BASE)
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325 if (!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
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326 (filter_type == PNG_INTRAPIXEL_DIFFERENCING) &&
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327 ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) &&
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328 (color_type == PNG_COLOR_TYPE_RGB ||
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329 color_type == PNG_COLOR_TYPE_RGB_ALPHA)))
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330 png_error(png_ptr, "Unknown filter method in IHDR");
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331 if (png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)
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332 png_warning(png_ptr, "Invalid filter method in IHDR");
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335 if (filter_type != PNG_FILTER_TYPE_BASE)
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336 png_error(png_ptr, "Unknown filter method in IHDR");
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339 info_ptr->width = width;
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340 info_ptr->height = height;
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341 info_ptr->bit_depth = (png_byte)bit_depth;
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342 info_ptr->color_type =(png_byte) color_type;
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343 info_ptr->compression_type = (png_byte)compression_type;
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344 info_ptr->filter_type = (png_byte)filter_type;
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345 info_ptr->interlace_type = (png_byte)interlace_type;
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346 if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
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347 info_ptr->channels = 1;
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348 else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
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349 info_ptr->channels = 3;
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351 info_ptr->channels = 1;
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352 if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
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353 info_ptr->channels++;
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354 info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
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356 /* check for potential overflow */
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357 if (width > (PNG_UINT_32_MAX
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358 >> 3) /* 8-byte RGBA pixels */
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359 - 64 /* bigrowbuf hack */
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360 - 1 /* filter byte */
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361 - 7*8 /* rounding of width to multiple of 8 pixels */
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362 - 8) /* extra max_pixel_depth pad */
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363 info_ptr->rowbytes = (png_size_t)0;
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365 info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width);
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368 #if defined(PNG_oFFs_SUPPORTED)
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370 png_set_oFFs(png_structp png_ptr, png_infop info_ptr,
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371 png_int_32 offset_x, png_int_32 offset_y, int unit_type)
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373 png_debug1(1, "in %s storage function\n", "oFFs");
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374 if (png_ptr == NULL || info_ptr == NULL)
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377 info_ptr->x_offset = offset_x;
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378 info_ptr->y_offset = offset_y;
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379 info_ptr->offset_unit_type = (png_byte)unit_type;
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380 info_ptr->valid |= PNG_INFO_oFFs;
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384 #if defined(PNG_pCAL_SUPPORTED)
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386 png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
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387 png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams,
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388 png_charp units, png_charpp params)
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390 png_uint_32 length;
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393 png_debug1(1, "in %s storage function\n", "pCAL");
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394 if (png_ptr == NULL || info_ptr == NULL)
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397 length = png_strlen(purpose) + 1;
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398 png_debug1(3, "allocating purpose for info (%lu bytes)\n",
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399 (unsigned long)length);
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400 info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length);
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401 if (info_ptr->pcal_purpose == NULL)
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403 png_warning(png_ptr, "Insufficient memory for pCAL purpose.");
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406 png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length);
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408 png_debug(3, "storing X0, X1, type, and nparams in info\n");
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409 info_ptr->pcal_X0 = X0;
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410 info_ptr->pcal_X1 = X1;
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411 info_ptr->pcal_type = (png_byte)type;
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412 info_ptr->pcal_nparams = (png_byte)nparams;
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414 length = png_strlen(units) + 1;
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415 png_debug1(3, "allocating units for info (%lu bytes)\n",
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416 (unsigned long)length);
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417 info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length);
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418 if (info_ptr->pcal_units == NULL)
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420 png_warning(png_ptr, "Insufficient memory for pCAL units.");
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423 png_memcpy(info_ptr->pcal_units, units, (png_size_t)length);
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425 info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr,
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426 (png_uint_32)((nparams + 1) * png_sizeof(png_charp)));
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427 if (info_ptr->pcal_params == NULL)
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429 png_warning(png_ptr, "Insufficient memory for pCAL params.");
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433 info_ptr->pcal_params[nparams] = NULL;
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435 for (i = 0; i < nparams; i++)
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437 length = png_strlen(params[i]) + 1;
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438 png_debug2(3, "allocating parameter %d for info (%lu bytes)\n", i,
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439 (unsigned long)length);
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440 info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length);
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441 if (info_ptr->pcal_params[i] == NULL)
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443 png_warning(png_ptr, "Insufficient memory for pCAL parameter.");
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446 png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length);
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449 info_ptr->valid |= PNG_INFO_pCAL;
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450 #ifdef PNG_FREE_ME_SUPPORTED
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451 info_ptr->free_me |= PNG_FREE_PCAL;
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456 #if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED)
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457 #ifdef PNG_FLOATING_POINT_SUPPORTED
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459 png_set_sCAL(png_structp png_ptr, png_infop info_ptr,
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460 int unit, double width, double height)
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462 png_debug1(1, "in %s storage function\n", "sCAL");
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463 if (png_ptr == NULL || info_ptr == NULL)
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466 info_ptr->scal_unit = (png_byte)unit;
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467 info_ptr->scal_pixel_width = width;
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468 info_ptr->scal_pixel_height = height;
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470 info_ptr->valid |= PNG_INFO_sCAL;
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473 #ifdef PNG_FIXED_POINT_SUPPORTED
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475 png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
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476 int unit, png_charp swidth, png_charp sheight)
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478 png_uint_32 length;
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480 png_debug1(1, "in %s storage function\n", "sCAL");
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481 if (png_ptr == NULL || info_ptr == NULL)
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484 info_ptr->scal_unit = (png_byte)unit;
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486 length = png_strlen(swidth) + 1;
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487 png_debug1(3, "allocating unit for info (%u bytes)\n",
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488 (unsigned int)length);
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489 info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, length);
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490 if (info_ptr->scal_s_width == NULL)
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492 png_warning(png_ptr,
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493 "Memory allocation failed while processing sCAL.");
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496 png_memcpy(info_ptr->scal_s_width, swidth, (png_size_t)length);
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498 length = png_strlen(sheight) + 1;
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499 png_debug1(3, "allocating unit for info (%u bytes)\n",
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500 (unsigned int)length);
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501 info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, length);
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502 if (info_ptr->scal_s_height == NULL)
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504 png_free (png_ptr, info_ptr->scal_s_width);
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505 info_ptr->scal_s_width = NULL;
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506 png_warning(png_ptr,
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507 "Memory allocation failed while processing sCAL.");
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510 png_memcpy(info_ptr->scal_s_height, sheight, (png_size_t)length);
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511 info_ptr->valid |= PNG_INFO_sCAL;
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512 #ifdef PNG_FREE_ME_SUPPORTED
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513 info_ptr->free_me |= PNG_FREE_SCAL;
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520 #if defined(PNG_pHYs_SUPPORTED)
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522 png_set_pHYs(png_structp png_ptr, png_infop info_ptr,
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523 png_uint_32 res_x, png_uint_32 res_y, int unit_type)
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525 png_debug1(1, "in %s storage function\n", "pHYs");
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526 if (png_ptr == NULL || info_ptr == NULL)
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529 info_ptr->x_pixels_per_unit = res_x;
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530 info_ptr->y_pixels_per_unit = res_y;
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531 info_ptr->phys_unit_type = (png_byte)unit_type;
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532 info_ptr->valid |= PNG_INFO_pHYs;
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537 png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
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538 png_colorp palette, int num_palette)
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541 png_debug1(1, "in %s storage function\n", "PLTE");
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542 if (png_ptr == NULL || info_ptr == NULL)
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545 if (num_palette < 0 || num_palette > PNG_MAX_PALETTE_LENGTH)
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547 if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
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548 png_error(png_ptr, "Invalid palette length");
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551 png_warning(png_ptr, "Invalid palette length");
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557 * It may not actually be necessary to set png_ptr->palette here;
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558 * we do it for backward compatibility with the way the png_handle_tRNS
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559 * function used to do the allocation.
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561 #ifdef PNG_FREE_ME_SUPPORTED
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562 png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
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565 /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead
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566 of num_palette entries,
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567 in case of an invalid PNG file that has too-large sample values. */
\r
568 png_ptr->palette = (png_colorp)png_malloc(png_ptr,
\r
569 PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color));
\r
570 png_memset(png_ptr->palette, 0, PNG_MAX_PALETTE_LENGTH *
\r
571 png_sizeof(png_color));
\r
572 png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof(png_color));
\r
573 info_ptr->palette = png_ptr->palette;
\r
574 info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;
\r
576 #ifdef PNG_FREE_ME_SUPPORTED
\r
577 info_ptr->free_me |= PNG_FREE_PLTE;
\r
579 png_ptr->flags |= PNG_FLAG_FREE_PLTE;
\r
582 info_ptr->valid |= PNG_INFO_PLTE;
\r
585 #if defined(PNG_sBIT_SUPPORTED)
\r
587 png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
\r
588 png_color_8p sig_bit)
\r
590 png_debug1(1, "in %s storage function\n", "sBIT");
\r
591 if (png_ptr == NULL || info_ptr == NULL)
\r
594 png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof(png_color_8));
\r
595 info_ptr->valid |= PNG_INFO_sBIT;
\r
599 #if defined(PNG_sRGB_SUPPORTED)
\r
601 png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent)
\r
603 png_debug1(1, "in %s storage function\n", "sRGB");
\r
604 if (png_ptr == NULL || info_ptr == NULL)
\r
607 info_ptr->srgb_intent = (png_byte)intent;
\r
608 info_ptr->valid |= PNG_INFO_sRGB;
\r
612 png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
\r
615 #if defined(PNG_gAMA_SUPPORTED)
\r
616 #ifdef PNG_FLOATING_POINT_SUPPORTED
\r
619 #ifdef PNG_FIXED_POINT_SUPPORTED
\r
620 png_fixed_point int_file_gamma;
\r
623 #if defined(PNG_cHRM_SUPPORTED)
\r
624 #ifdef PNG_FLOATING_POINT_SUPPORTED
\r
625 float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y;
\r
627 #ifdef PNG_FIXED_POINT_SUPPORTED
\r
628 png_fixed_point int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
\r
629 int_green_y, int_blue_x, int_blue_y;
\r
632 png_debug1(1, "in %s storage function\n", "sRGB_gAMA_and_cHRM");
\r
633 if (png_ptr == NULL || info_ptr == NULL)
\r
636 png_set_sRGB(png_ptr, info_ptr, intent);
\r
638 #if defined(PNG_gAMA_SUPPORTED)
\r
639 #ifdef PNG_FLOATING_POINT_SUPPORTED
\r
640 file_gamma = (float).45455;
\r
641 png_set_gAMA(png_ptr, info_ptr, file_gamma);
\r
643 #ifdef PNG_FIXED_POINT_SUPPORTED
\r
644 int_file_gamma = 45455L;
\r
645 png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma);
\r
649 #if defined(PNG_cHRM_SUPPORTED)
\r
650 #ifdef PNG_FIXED_POINT_SUPPORTED
\r
651 int_white_x = 31270L;
\r
652 int_white_y = 32900L;
\r
653 int_red_x = 64000L;
\r
654 int_red_y = 33000L;
\r
655 int_green_x = 30000L;
\r
656 int_green_y = 60000L;
\r
657 int_blue_x = 15000L;
\r
658 int_blue_y = 6000L;
\r
660 png_set_cHRM_fixed(png_ptr, info_ptr,
\r
661 int_white_x, int_white_y, int_red_x, int_red_y, int_green_x, int_green_y,
\r
662 int_blue_x, int_blue_y);
\r
664 #ifdef PNG_FLOATING_POINT_SUPPORTED
\r
665 white_x = (float).3127;
\r
666 white_y = (float).3290;
\r
667 red_x = (float).64;
\r
668 red_y = (float).33;
\r
669 green_x = (float).30;
\r
670 green_y = (float).60;
\r
671 blue_x = (float).15;
\r
672 blue_y = (float).06;
\r
674 png_set_cHRM(png_ptr, info_ptr,
\r
675 white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y);
\r
682 #if defined(PNG_iCCP_SUPPORTED)
\r
684 png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
\r
685 png_charp name, int compression_type,
\r
686 png_charp profile, png_uint_32 proflen)
\r
688 png_charp new_iccp_name;
\r
689 png_charp new_iccp_profile;
\r
690 png_uint_32 length;
\r
692 png_debug1(1, "in %s storage function\n", "iCCP");
\r
693 if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)
\r
696 length = png_strlen(name)+1;
\r
697 new_iccp_name = (png_charp)png_malloc_warn(png_ptr, length);
\r
698 if (new_iccp_name == NULL)
\r
700 png_warning(png_ptr, "Insufficient memory to process iCCP chunk.");
\r
703 png_memcpy(new_iccp_name, name, length);
\r
704 new_iccp_profile = (png_charp)png_malloc_warn(png_ptr, proflen);
\r
705 if (new_iccp_profile == NULL)
\r
707 png_free (png_ptr, new_iccp_name);
\r
708 png_warning(png_ptr,
\r
709 "Insufficient memory to process iCCP profile.");
\r
712 png_memcpy(new_iccp_profile, profile, (png_size_t)proflen);
\r
714 png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0);
\r
716 info_ptr->iccp_proflen = proflen;
\r
717 info_ptr->iccp_name = new_iccp_name;
\r
718 info_ptr->iccp_profile = new_iccp_profile;
\r
719 /* Compression is always zero but is here so the API and info structure
\r
720 * does not have to change if we introduce multiple compression types */
\r
721 info_ptr->iccp_compression = (png_byte)compression_type;
\r
722 #ifdef PNG_FREE_ME_SUPPORTED
\r
723 info_ptr->free_me |= PNG_FREE_ICCP;
\r
725 info_ptr->valid |= PNG_INFO_iCCP;
\r
729 #if defined(PNG_TEXT_SUPPORTED)
\r
731 png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
\r
735 ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text);
\r
737 png_error(png_ptr, "Insufficient memory to store text");
\r
741 png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
\r
746 png_debug1(1, "in %s storage function\n", (png_ptr->chunk_name[0] == '\0' ?
\r
747 "text" : (png_const_charp)png_ptr->chunk_name));
\r
749 if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
\r
752 /* Make sure we have enough space in the "text" array in info_struct
\r
753 * to hold all of the incoming text_ptr objects.
\r
755 if (info_ptr->num_text + num_text > info_ptr->max_text)
\r
757 if (info_ptr->text != NULL)
\r
759 png_textp old_text;
\r
762 old_max = info_ptr->max_text;
\r
763 info_ptr->max_text = info_ptr->num_text + num_text + 8;
\r
764 old_text = info_ptr->text;
\r
765 info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
\r
766 (png_uint_32)(info_ptr->max_text * png_sizeof(png_text)));
\r
767 if (info_ptr->text == NULL)
\r
769 png_free(png_ptr, old_text);
\r
772 png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max *
\r
773 png_sizeof(png_text)));
\r
774 png_free(png_ptr, old_text);
\r
778 info_ptr->max_text = num_text + 8;
\r
779 info_ptr->num_text = 0;
\r
780 info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
\r
781 (png_uint_32)(info_ptr->max_text * png_sizeof(png_text)));
\r
782 if (info_ptr->text == NULL)
\r
784 #ifdef PNG_FREE_ME_SUPPORTED
\r
785 info_ptr->free_me |= PNG_FREE_TEXT;
\r
788 png_debug1(3, "allocated %d entries for info_ptr->text\n",
\r
789 info_ptr->max_text);
\r
791 for (i = 0; i < num_text; i++)
\r
793 png_size_t text_length, key_len;
\r
794 png_size_t lang_len, lang_key_len;
\r
795 png_textp textp = &(info_ptr->text[info_ptr->num_text]);
\r
797 if (text_ptr[i].key == NULL)
\r
800 key_len = png_strlen(text_ptr[i].key);
\r
802 if (text_ptr[i].compression <= 0)
\r
808 #ifdef PNG_iTXt_SUPPORTED
\r
810 /* set iTXt data */
\r
811 if (text_ptr[i].lang != NULL)
\r
812 lang_len = png_strlen(text_ptr[i].lang);
\r
815 if (text_ptr[i].lang_key != NULL)
\r
816 lang_key_len = png_strlen(text_ptr[i].lang_key);
\r
822 png_warning(png_ptr, "iTXt chunk not supported.");
\r
827 if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0')
\r
830 #ifdef PNG_iTXt_SUPPORTED
\r
831 if (text_ptr[i].compression > 0)
\r
832 textp->compression = PNG_ITXT_COMPRESSION_NONE;
\r
835 textp->compression = PNG_TEXT_COMPRESSION_NONE;
\r
839 text_length = png_strlen(text_ptr[i].text);
\r
840 textp->compression = text_ptr[i].compression;
\r
843 textp->key = (png_charp)png_malloc_warn(png_ptr,
\r
845 (key_len + text_length + lang_len + lang_key_len + 4));
\r
846 if (textp->key == NULL)
\r
848 png_debug2(2, "Allocated %lu bytes at %x in png_set_text\n",
\r
850 (key_len + lang_len + lang_key_len + text_length + 4),
\r
853 png_memcpy(textp->key, text_ptr[i].key,
\r
854 (png_size_t)(key_len));
\r
855 *(textp->key + key_len) = '\0';
\r
856 #ifdef PNG_iTXt_SUPPORTED
\r
857 if (text_ptr[i].compression > 0)
\r
859 textp->lang = textp->key + key_len + 1;
\r
860 png_memcpy(textp->lang, text_ptr[i].lang, lang_len);
\r
861 *(textp->lang + lang_len) = '\0';
\r
862 textp->lang_key = textp->lang + lang_len + 1;
\r
863 png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len);
\r
864 *(textp->lang_key + lang_key_len) = '\0';
\r
865 textp->text = textp->lang_key + lang_key_len + 1;
\r
870 #ifdef PNG_iTXt_SUPPORTED
\r
872 textp->lang_key=NULL;
\r
874 textp->text = textp->key + key_len + 1;
\r
877 png_memcpy(textp->text, text_ptr[i].text,
\r
878 (png_size_t)(text_length));
\r
879 *(textp->text + text_length) = '\0';
\r
881 #ifdef PNG_iTXt_SUPPORTED
\r
882 if (textp->compression > 0)
\r
884 textp->text_length = 0;
\r
885 textp->itxt_length = text_length;
\r
890 textp->text_length = text_length;
\r
891 #ifdef PNG_iTXt_SUPPORTED
\r
892 textp->itxt_length = 0;
\r
895 info_ptr->num_text++;
\r
896 png_debug1(3, "transferred text chunk %d\n", info_ptr->num_text);
\r
902 #if defined(PNG_tIME_SUPPORTED)
\r
904 png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time)
\r
906 png_debug1(1, "in %s storage function\n", "tIME");
\r
907 if (png_ptr == NULL || info_ptr == NULL ||
\r
908 (png_ptr->mode & PNG_WROTE_tIME))
\r
911 png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof(png_time));
\r
912 info_ptr->valid |= PNG_INFO_tIME;
\r
916 #if defined(PNG_tRNS_SUPPORTED)
\r
918 png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
\r
919 png_bytep trans, int num_trans, png_color_16p trans_values)
\r
921 png_debug1(1, "in %s storage function\n", "tRNS");
\r
922 if (png_ptr == NULL || info_ptr == NULL)
\r
928 * It may not actually be necessary to set png_ptr->trans here;
\r
929 * we do it for backward compatibility with the way the png_handle_tRNS
\r
930 * function used to do the allocation.
\r
933 #ifdef PNG_FREE_ME_SUPPORTED
\r
934 png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
\r
937 /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */
\r
938 png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr,
\r
939 (png_uint_32)PNG_MAX_PALETTE_LENGTH);
\r
940 if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH)
\r
941 png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans);
\r
944 if (trans_values != NULL)
\r
946 int sample_max = (1 << info_ptr->bit_depth);
\r
947 if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY &&
\r
948 (int)trans_values->gray > sample_max) ||
\r
949 (info_ptr->color_type == PNG_COLOR_TYPE_RGB &&
\r
950 ((int)trans_values->red > sample_max ||
\r
951 (int)trans_values->green > sample_max ||
\r
952 (int)trans_values->blue > sample_max)))
\r
953 png_warning(png_ptr,
\r
954 "tRNS chunk has out-of-range samples for bit_depth");
\r
955 png_memcpy(&(info_ptr->trans_values), trans_values,
\r
956 png_sizeof(png_color_16));
\r
957 if (num_trans == 0)
\r
961 info_ptr->num_trans = (png_uint_16)num_trans;
\r
962 if (num_trans != 0)
\r
964 info_ptr->valid |= PNG_INFO_tRNS;
\r
965 #ifdef PNG_FREE_ME_SUPPORTED
\r
966 info_ptr->free_me |= PNG_FREE_TRNS;
\r
968 png_ptr->flags |= PNG_FLAG_FREE_TRNS;
\r
974 #if defined(PNG_sPLT_SUPPORTED)
\r
976 png_set_sPLT(png_structp png_ptr,
\r
977 png_infop info_ptr, png_sPLT_tp entries, int nentries)
\r
979 * entries - array of png_sPLT_t structures
\r
980 * to be added to the list of palettes
\r
981 * in the info structure.
\r
982 * nentries - number of palette structures to be
\r
989 if (png_ptr == NULL || info_ptr == NULL)
\r
992 np = (png_sPLT_tp)png_malloc_warn(png_ptr,
\r
993 (info_ptr->splt_palettes_num + nentries) *
\r
994 (png_uint_32)png_sizeof(png_sPLT_t));
\r
997 png_warning(png_ptr, "No memory for sPLT palettes.");
\r
1001 png_memcpy(np, info_ptr->splt_palettes,
\r
1002 info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t));
\r
1003 png_free(png_ptr, info_ptr->splt_palettes);
\r
1004 info_ptr->splt_palettes=NULL;
\r
1006 for (i = 0; i < nentries; i++)
\r
1008 png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;
\r
1009 png_sPLT_tp from = entries + i;
\r
1010 png_uint_32 length;
\r
1012 length = png_strlen(from->name) + 1;
\r
1013 to->name = (png_charp)png_malloc_warn(png_ptr, length);
\r
1014 if (to->name == NULL)
\r
1016 png_warning(png_ptr,
\r
1017 "Out of memory while processing sPLT chunk");
\r
1020 png_memcpy(to->name, from->name, length);
\r
1021 to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr,
\r
1022 (png_uint_32)(from->nentries * png_sizeof(png_sPLT_entry)));
\r
1023 if (to->entries == NULL)
\r
1025 png_warning(png_ptr,
\r
1026 "Out of memory while processing sPLT chunk");
\r
1027 png_free(png_ptr, to->name);
\r
1031 png_memcpy(to->entries, from->entries,
\r
1032 from->nentries * png_sizeof(png_sPLT_entry));
\r
1033 to->nentries = from->nentries;
\r
1034 to->depth = from->depth;
\r
1037 info_ptr->splt_palettes = np;
\r
1038 info_ptr->splt_palettes_num += nentries;
\r
1039 info_ptr->valid |= PNG_INFO_sPLT;
\r
1040 #ifdef PNG_FREE_ME_SUPPORTED
\r
1041 info_ptr->free_me |= PNG_FREE_SPLT;
\r
1044 #endif /* PNG_sPLT_SUPPORTED */
\r
1046 #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
\r
1048 png_set_unknown_chunks(png_structp png_ptr,
\r
1049 png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)
\r
1051 png_unknown_chunkp np;
\r
1054 if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0)
\r
1057 np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
\r
1058 (png_uint_32)((info_ptr->unknown_chunks_num + num_unknowns) *
\r
1059 png_sizeof(png_unknown_chunk)));
\r
1062 png_warning(png_ptr,
\r
1063 "Out of memory while processing unknown chunk.");
\r
1067 png_memcpy(np, info_ptr->unknown_chunks,
\r
1068 info_ptr->unknown_chunks_num * png_sizeof(png_unknown_chunk));
\r
1069 png_free(png_ptr, info_ptr->unknown_chunks);
\r
1070 info_ptr->unknown_chunks=NULL;
\r
1072 for (i = 0; i < num_unknowns; i++)
\r
1074 png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i;
\r
1075 png_unknown_chunkp from = unknowns + i;
\r
1077 png_memcpy((png_charp)to->name,
\r
1078 (png_charp)from->name,
\r
1079 png_sizeof(from->name));
\r
1080 to->name[png_sizeof(to->name)-1] = '\0';
\r
1081 to->size = from->size;
\r
1082 /* note our location in the read or write sequence */
\r
1083 to->location = (png_byte)(png_ptr->mode & 0xff);
\r
1085 if (from->size == 0)
\r
1089 to->data = (png_bytep)png_malloc_warn(png_ptr,
\r
1090 (png_uint_32)from->size);
\r
1091 if (to->data == NULL)
\r
1093 png_warning(png_ptr,
\r
1094 "Out of memory while processing unknown chunk.");
\r
1098 png_memcpy(to->data, from->data, from->size);
\r
1102 info_ptr->unknown_chunks = np;
\r
1103 info_ptr->unknown_chunks_num += num_unknowns;
\r
1104 #ifdef PNG_FREE_ME_SUPPORTED
\r
1105 info_ptr->free_me |= PNG_FREE_UNKN;
\r
1109 png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr,
\r
1110 int chunk, int location)
\r
1112 if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk <
\r
1113 (int)info_ptr->unknown_chunks_num)
\r
1114 info_ptr->unknown_chunks[chunk].location = (png_byte)location;
\r
1118 #if defined(PNG_1_0_X) || defined(PNG_1_2_X)
\r
1119 #if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
\r
1120 defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
\r
1122 png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted)
\r
1124 /* This function is deprecated in favor of png_permit_mng_features()
\r
1125 and will be removed from libpng-1.3.0 */
\r
1126 png_debug(1, "in png_permit_empty_plte, DEPRECATED.\n");
\r
1127 if (png_ptr == NULL)
\r
1129 png_ptr->mng_features_permitted = (png_byte)
\r
1130 ((png_ptr->mng_features_permitted & (~PNG_FLAG_MNG_EMPTY_PLTE)) |
\r
1131 ((empty_plte_permitted & PNG_FLAG_MNG_EMPTY_PLTE)));
\r
1136 #if defined(PNG_MNG_FEATURES_SUPPORTED)
\r
1137 png_uint_32 PNGAPI
\r
1138 png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features)
\r
1140 png_debug(1, "in png_permit_mng_features\n");
\r
1141 if (png_ptr == NULL)
\r
1142 return (png_uint_32)0;
\r
1143 png_ptr->mng_features_permitted =
\r
1144 (png_byte)(mng_features & PNG_ALL_MNG_FEATURES);
\r
1145 return (png_uint_32)png_ptr->mng_features_permitted;
\r
1149 #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
\r
1151 png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep
\r
1152 chunk_list, int num_chunks)
\r
1154 png_bytep new_list, p;
\r
1155 int i, old_num_chunks;
\r
1156 if (png_ptr == NULL)
\r
1158 if (num_chunks == 0)
\r
1160 if (keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE)
\r
1161 png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
\r
1163 png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
\r
1165 if (keep == PNG_HANDLE_CHUNK_ALWAYS)
\r
1166 png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS;
\r
1168 png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS;
\r
1171 if (chunk_list == NULL)
\r
1173 old_num_chunks = png_ptr->num_chunk_list;
\r
1174 new_list=(png_bytep)png_malloc(png_ptr,
\r
1176 (5*(num_chunks + old_num_chunks)));
\r
1177 if (png_ptr->chunk_list != NULL)
\r
1179 png_memcpy(new_list, png_ptr->chunk_list,
\r
1180 (png_size_t)(5*old_num_chunks));
\r
1181 png_free(png_ptr, png_ptr->chunk_list);
\r
1182 png_ptr->chunk_list=NULL;
\r
1184 png_memcpy(new_list + 5*old_num_chunks, chunk_list,
\r
1185 (png_size_t)(5*num_chunks));
\r
1186 for (p = new_list + 5*old_num_chunks + 4, i = 0; i<num_chunks; i++, p += 5)
\r
1187 *p=(png_byte)keep;
\r
1188 png_ptr->num_chunk_list = old_num_chunks + num_chunks;
\r
1189 png_ptr->chunk_list = new_list;
\r
1190 #ifdef PNG_FREE_ME_SUPPORTED
\r
1191 png_ptr->free_me |= PNG_FREE_LIST;
\r
1196 #if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
\r
1198 png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr,
\r
1199 png_user_chunk_ptr read_user_chunk_fn)
\r
1201 png_debug(1, "in png_set_read_user_chunk_fn\n");
\r
1202 if (png_ptr == NULL)
\r
1204 png_ptr->read_user_chunk_fn = read_user_chunk_fn;
\r
1205 png_ptr->user_chunk_ptr = user_chunk_ptr;
\r
1209 #if defined(PNG_INFO_IMAGE_SUPPORTED)
\r
1211 png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
\r
1213 png_debug1(1, "in %s storage function\n", "rows");
\r
1215 if (png_ptr == NULL || info_ptr == NULL)
\r
1218 if (info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers))
\r
1219 png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
\r
1220 info_ptr->row_pointers = row_pointers;
\r
1222 info_ptr->valid |= PNG_INFO_IDAT;
\r
1226 #ifdef PNG_WRITE_SUPPORTED
\r
1228 png_set_compression_buffer_size(png_structp png_ptr,
\r
1231 if (png_ptr == NULL)
\r
1233 png_free(png_ptr, png_ptr->zbuf);
\r
1234 png_ptr->zbuf_size = (png_size_t)size;
\r
1235 png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size);
\r
1236 png_ptr->zstream.next_out = png_ptr->zbuf;
\r
1237 png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
\r
1242 png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
\r
1244 if (png_ptr && info_ptr)
\r
1245 info_ptr->valid &= ~mask;
\r
1250 #ifdef PNG_ASSEMBLER_CODE_SUPPORTED
\r
1251 /* function was added to libpng 1.2.0 and should always exist by default */
\r
1253 png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags)
\r
1255 /* Obsolete as of libpng-1.2.20 and will be removed from libpng-1.4.0 */
\r
1256 if (png_ptr != NULL)
\r
1257 png_ptr->asm_flags = 0;
\r
1258 asm_flags = asm_flags; /* Quiet the compiler */
\r
1261 /* this function was added to libpng 1.2.0 */
\r
1263 png_set_mmx_thresholds (png_structp png_ptr,
\r
1264 png_byte mmx_bitdepth_threshold,
\r
1265 png_uint_32 mmx_rowbytes_threshold)
\r
1267 /* Obsolete as of libpng-1.2.20 and will be removed from libpng-1.4.0 */
\r
1268 if (png_ptr == NULL)
\r
1270 /* Quiet the compiler */
\r
1271 mmx_bitdepth_threshold = mmx_bitdepth_threshold;
\r
1272 mmx_rowbytes_threshold = mmx_rowbytes_threshold;
\r
1274 #endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
\r
1276 #ifdef PNG_SET_USER_LIMITS_SUPPORTED
\r
1277 /* this function was added to libpng 1.2.6 */
\r
1279 png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max,
\r
1280 png_uint_32 user_height_max)
\r
1282 /* Images with dimensions larger than these limits will be
\r
1283 * rejected by png_set_IHDR(). To accept any PNG datastream
\r
1284 * regardless of dimensions, set both limits to 0x7ffffffL.
\r
1286 if (png_ptr == NULL) return;
\r
1287 png_ptr->user_width_max = user_width_max;
\r
1288 png_ptr->user_height_max = user_height_max;
\r
1290 #endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
\r
1292 #endif /* ?PNG_1_0_X */
\r
1293 #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
\r