Mercurial > judyates
diff e2gallerypro/e2upload/Backend/Assets/getid3/module.graphic.png.php @ 3:3f6b44aa6b35 judyates
[svn r4] added ability to buy stuff, from a Prints page, but it doesn't work well with the css, and it also has not been fitted into the perl make system.
| author | rlm |
|---|---|
| date | Mon, 22 Feb 2010 08:02:39 -0500 |
| parents | |
| children |
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1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000 1.2 +++ b/e2gallerypro/e2upload/Backend/Assets/getid3/module.graphic.png.php Mon Feb 22 08:02:39 2010 -0500 1.3 @@ -0,0 +1,556 @@ 1.4 +<?php 1.5 +// +----------------------------------------------------------------------+ 1.6 +// | PHP version 5 | 1.7 +// +----------------------------------------------------------------------+ 1.8 +// | Copyright (c) 2002-2006 James Heinrich, Allan Hansen | 1.9 +// +----------------------------------------------------------------------+ 1.10 +// | This source file is subject to version 2 of the GPL license, | 1.11 +// | that is bundled with this package in the file license.txt and is | 1.12 +// | available through the world-wide-web at the following url: | 1.13 +// | http://www.gnu.org/copyleft/gpl.html | 1.14 +// +----------------------------------------------------------------------+ 1.15 +// | getID3() - http://getid3.sourceforge.net or http://www.getid3.org | 1.16 +// +----------------------------------------------------------------------+ 1.17 +// | Authors: James Heinrich <infoØgetid3*org> | 1.18 +// | Allan Hansen <ahØartemis*dk> | 1.19 +// +----------------------------------------------------------------------+ 1.20 +// | module.graphic.png.php | 1.21 +// | Module for analyzing PNG graphic files. | 1.22 +// | dependencies: zlib support in PHP (optional) | 1.23 +// +----------------------------------------------------------------------+ 1.24 +// 1.25 +// $Id: module.graphic.png.php,v 1.4 2006/11/02 10:48:02 ah Exp $ 1.26 + 1.27 + 1.28 + 1.29 +class getid3_png extends getid3_handler 1.30 +{ 1.31 + 1.32 + public function Analyze() { 1.33 + 1.34 + $getid3 = $this->getid3; 1.35 + 1.36 + $getid3->info['png'] = array (); 1.37 + $info_png = &$getid3->info['png']; 1.38 + 1.39 + $getid3->info['fileformat'] = 'png'; 1.40 + $getid3->info['video']['dataformat'] = 'png'; 1.41 + $getid3->info['video']['lossless'] = false; 1.42 + 1.43 + fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET); 1.44 + $png_filedata = fread($getid3->fp, getid3::FREAD_BUFFER_SIZE); 1.45 + 1.46 + // Magic bytes "\x89\x50\x4E\x47\x0D\x0A\x1A\x0A" 1.47 + 1.48 + $offset = 8; 1.49 + 1.50 + while (((ftell($getid3->fp) - (strlen($png_filedata) - $offset)) < $getid3->info['filesize'])) { 1.51 + 1.52 + $chunk['data_length'] = getid3_lib::BigEndian2Int(substr($png_filedata, $offset, 4)); 1.53 + $offset += 4; 1.54 + while (((strlen($png_filedata) - $offset) < ($chunk['data_length'] + 4)) && (ftell($getid3->fp) < $getid3->info['filesize'])) { 1.55 + $png_filedata .= fread($getid3->fp, getid3::FREAD_BUFFER_SIZE); 1.56 + } 1.57 + 1.58 + $chunk['type_text'] = substr($png_filedata, $offset, 4); 1.59 + $chunk['type_raw'] = getid3_lib::BigEndian2Int($chunk['type_text']); 1.60 + $offset += 4; 1.61 + 1.62 + $chunk['data'] = substr($png_filedata, $offset, $chunk['data_length']); 1.63 + $offset += $chunk['data_length']; 1.64 + 1.65 + $chunk['crc'] = getid3_lib::BigEndian2Int(substr($png_filedata, $offset, 4)); 1.66 + $offset += 4; 1.67 + 1.68 + $chunk['flags']['ancilliary'] = (bool)($chunk['type_raw'] & 0x20000000); 1.69 + $chunk['flags']['private'] = (bool)($chunk['type_raw'] & 0x00200000); 1.70 + $chunk['flags']['reserved'] = (bool)($chunk['type_raw'] & 0x00002000); 1.71 + $chunk['flags']['safe_to_copy'] = (bool)($chunk['type_raw'] & 0x00000020); 1.72 + 1.73 + // shortcut 1.74 + $info_png[$chunk['type_text']] = array (); 1.75 + $info_png_chunk_type_text = &$info_png[$chunk['type_text']]; 1.76 + 1.77 + switch ($chunk['type_text']) { 1.78 + 1.79 + case 'IHDR': // Image Header 1.80 + $info_png_chunk_type_text['header'] = $chunk; 1.81 + $info_png_chunk_type_text['width'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 0, 4)); 1.82 + $info_png_chunk_type_text['height'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 4, 4)); 1.83 + 1.84 + getid3_lib::ReadSequence('BigEndian2Int', $info_png_chunk_type_text['raw'], $chunk['data'], 8, 1.85 + array ( 1.86 + 'bit_depth' => 1, 1.87 + 'color_type' => 1, 1.88 + 'compression_method' => 1, 1.89 + 'filter_method' => 1, 1.90 + 'interlace_method' => 1 1.91 + ) 1.92 + ); 1.93 + 1.94 + $info_png_chunk_type_text['compression_method_text'] = getid3_png::PNGcompressionMethodLookup($info_png_chunk_type_text['raw']['compression_method']); 1.95 + $info_png_chunk_type_text['color_type']['palette'] = (bool)($info_png_chunk_type_text['raw']['color_type'] & 0x01); 1.96 + $info_png_chunk_type_text['color_type']['true_color'] = (bool)($info_png_chunk_type_text['raw']['color_type'] & 0x02); 1.97 + $info_png_chunk_type_text['color_type']['alpha'] = (bool)($info_png_chunk_type_text['raw']['color_type'] & 0x04); 1.98 + 1.99 + $getid3->info['video']['resolution_x'] = $info_png_chunk_type_text['width']; 1.100 + $getid3->info['video']['resolution_y'] = $info_png_chunk_type_text['height']; 1.101 + 1.102 + $getid3->info['video']['bits_per_sample'] = getid3_png::IHDRcalculateBitsPerSample($info_png_chunk_type_text['raw']['color_type'], $info_png_chunk_type_text['raw']['bit_depth']); 1.103 + break; 1.104 + 1.105 + 1.106 + case 'PLTE': // Palette 1.107 + $info_png_chunk_type_text['header'] = $chunk; 1.108 + $palette_offset = 0; 1.109 + for ($i = 0; $i <= 255; $i++) { 1.110 + $red = @getid3_lib::BigEndian2Int($chunk['data']{$palette_offset++}); 1.111 + $green = @getid3_lib::BigEndian2Int($chunk['data']{$palette_offset++}); 1.112 + $blue = @getid3_lib::BigEndian2Int($chunk['data']{$palette_offset++}); 1.113 + $info_png_chunk_type_text[$i] = (($red << 16) | ($green << 8) | ($blue)); 1.114 + } 1.115 + break; 1.116 + 1.117 + 1.118 + case 'tRNS': // Transparency 1.119 + $info_png_chunk_type_text['header'] = $chunk; 1.120 + switch ($info_png['IHDR']['raw']['color_type']) { 1.121 + case 0: 1.122 + $info_png_chunk_type_text['transparent_color_gray'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 0, 2)); 1.123 + break; 1.124 + 1.125 + case 2: 1.126 + $info_png_chunk_type_text['transparent_color_red'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 0, 2)); 1.127 + $info_png_chunk_type_text['transparent_color_green'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 2, 2)); 1.128 + $info_png_chunk_type_text['transparent_color_blue'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 4, 2)); 1.129 + break; 1.130 + 1.131 + case 3: 1.132 + for ($i = 0; $i < strlen($chunk['data']); $i++) { 1.133 + $info_png_chunk_type_text['palette_opacity'][$i] = getid3_lib::BigEndian2Int($chunk['data'][$i]); 1.134 + } 1.135 + break; 1.136 + 1.137 + case 4: 1.138 + case 6: 1.139 + throw new getid3_exception('Invalid color_type in tRNS chunk: '.$info_png['IHDR']['raw']['color_type']); 1.140 + 1.141 + default: 1.142 + $getid3->warning('Unhandled color_type in tRNS chunk: '.$info_png['IHDR']['raw']['color_type']); 1.143 + break; 1.144 + } 1.145 + break; 1.146 + 1.147 + 1.148 + case 'gAMA': // Image Gamma 1.149 + $info_png_chunk_type_text['header'] = $chunk; 1.150 + $info_png_chunk_type_text['gamma'] = getid3_lib::BigEndian2Int($chunk['data']) / 100000; 1.151 + break; 1.152 + 1.153 + 1.154 + case 'cHRM': // Primary Chromaticities 1.155 + $info_png_chunk_type_text['header'] = $chunk; 1.156 + $info_png_chunk_type_text['white_x'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 0, 4)) / 100000; 1.157 + $info_png_chunk_type_text['white_y'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 4, 4)) / 100000; 1.158 + $info_png_chunk_type_text['red_y'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 8, 4)) / 100000; 1.159 + $info_png_chunk_type_text['red_y'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 12, 4)) / 100000; 1.160 + $info_png_chunk_type_text['green_y'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 16, 4)) / 100000; 1.161 + $info_png_chunk_type_text['green_y'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 20, 4)) / 100000; 1.162 + $info_png_chunk_type_text['blue_y'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 24, 4)) / 100000; 1.163 + $info_png_chunk_type_text['blue_y'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 28, 4)) / 100000; 1.164 + break; 1.165 + 1.166 + 1.167 + case 'sRGB': // Standard RGB Color Space 1.168 + $info_png_chunk_type_text['header'] = $chunk; 1.169 + $info_png_chunk_type_text['reindering_intent'] = getid3_lib::BigEndian2Int($chunk['data']); 1.170 + $info_png_chunk_type_text['reindering_intent_text'] = getid3_png::PNGsRGBintentLookup($info_png_chunk_type_text['reindering_intent']); 1.171 + break; 1.172 + 1.173 + 1.174 + case 'iCCP': // Embedded ICC Profile 1.175 + $info_png_chunk_type_text['header'] = $chunk; 1.176 + list($profilename, $compressiondata) = explode("\x00", $chunk['data'], 2); 1.177 + $info_png_chunk_type_text['profile_name'] = $profilename; 1.178 + $info_png_chunk_type_text['compression_method'] = getid3_lib::BigEndian2Int($compressiondata[0]); 1.179 + $info_png_chunk_type_text['compression_profile'] = substr($compressiondata, 1); 1.180 + $info_png_chunk_type_text['compression_method_text'] = getid3_png::PNGcompressionMethodLookup($info_png_chunk_type_text['compression_method']); 1.181 + break; 1.182 + 1.183 + 1.184 + case 'tEXt': // Textual Data 1.185 + $info_png_chunk_type_text['header'] = $chunk; 1.186 + list($keyword, $text) = explode("\x00", $chunk['data'], 2); 1.187 + $info_png_chunk_type_text['keyword'] = $keyword; 1.188 + $info_png_chunk_type_text['text'] = $text; 1.189 + 1.190 + $info_png['comments'][$info_png_chunk_type_text['keyword']][] = $info_png_chunk_type_text['text']; 1.191 + break; 1.192 + 1.193 + 1.194 + case 'zTXt': // Compressed Textual Data 1.195 + $info_png_chunk_type_text['header'] = $chunk; 1.196 + list($keyword, $otherdata) = explode("\x00", $chunk['data'], 2); 1.197 + $info_png_chunk_type_text['keyword'] = $keyword; 1.198 + $info_png_chunk_type_text['compression_method'] = getid3_lib::BigEndian2Int(substr($otherdata, 0, 1)); 1.199 + $info_png_chunk_type_text['compressed_text'] = substr($otherdata, 1); 1.200 + $info_png_chunk_type_text['compression_method_text'] = getid3_png::PNGcompressionMethodLookup($info_png_chunk_type_text['compression_method']); 1.201 + 1.202 + if ($info_png_chunk_type_text['compression_method'] != 0) { 1.203 + // unknown compression method 1.204 + break; 1.205 + } 1.206 + 1.207 + if (function_exists('gzuncompress')) { 1.208 + $info_png_chunk_type_text['text'] = gzuncompress($info_png_chunk_type_text['compressed_text']); 1.209 + } 1.210 + else { 1.211 + if (!@$this->zlib_warning) { 1.212 + $getid3->warning('PHP does not have --with-zlib support - cannot gzuncompress()'); 1.213 + } 1.214 + $this->zlib_warning = true; 1.215 + } 1.216 + 1.217 + 1.218 + if (isset($info_png_chunk_type_text['text'])) { 1.219 + $info_png['comments'][$info_png_chunk_type_text['keyword']][] = $info_png_chunk_type_text['text']; 1.220 + } 1.221 + break; 1.222 + 1.223 + 1.224 + case 'iTXt': // International Textual Data 1.225 + $info_png_chunk_type_text['header'] = $chunk; 1.226 + list($keyword, $otherdata) = explode("\x00", $chunk['data'], 2); 1.227 + $info_png_chunk_type_text['keyword'] = $keyword; 1.228 + $info_png_chunk_type_text['compression'] = (bool)getid3_lib::BigEndian2Int(substr($otherdata, 0, 1)); 1.229 + $info_png_chunk_type_text['compression_method'] = getid3_lib::BigEndian2Int($otherdata[1]); 1.230 + $info_png_chunk_type_text['compression_method_text'] = getid3_png::PNGcompressionMethodLookup($info_png_chunk_type_text['compression_method']); 1.231 + list($languagetag, $translatedkeyword, $text) = explode("\x00", substr($otherdata, 2), 3); 1.232 + $info_png_chunk_type_text['language_tag'] = $languagetag; 1.233 + $info_png_chunk_type_text['translated_keyword'] = $translatedkeyword; 1.234 + 1.235 + if ($info_png_chunk_type_text['compression']) { 1.236 + 1.237 + switch ($info_png_chunk_type_text['compression_method']) { 1.238 + case 0: 1.239 + if (function_exists('gzuncompress')) { 1.240 + $info_png_chunk_type_text['text'] = gzuncompress($text); 1.241 + } 1.242 + else { 1.243 + if (!@$this->zlib_warning) { 1.244 + $getid3->warning('PHP does not have --with-zlib support - cannot gzuncompress()'); 1.245 + } 1.246 + $this->zlib_warning = true; 1.247 + } 1.248 + break; 1.249 + 1.250 + default: 1.251 + // unknown compression method 1.252 + break; 1.253 + } 1.254 + 1.255 + } else { 1.256 + 1.257 + $info_png_chunk_type_text['text'] = $text; 1.258 + 1.259 + } 1.260 + 1.261 + if (isset($info_png_chunk_type_text['text'])) { 1.262 + $info_png['comments'][$info_png_chunk_type_text['keyword']][] = $info_png_chunk_type_text['text']; 1.263 + } 1.264 + break; 1.265 + 1.266 + 1.267 + case 'bKGD': // Background Color 1.268 + $info_png_chunk_type_text['header'] = $chunk; 1.269 + switch ($info_png['IHDR']['raw']['color_type']) { 1.270 + case 0: 1.271 + case 4: 1.272 + $info_png_chunk_type_text['background_gray'] = getid3_lib::BigEndian2Int($chunk['data']); 1.273 + break; 1.274 + 1.275 + case 2: 1.276 + case 6: 1.277 + $info_png_chunk_type_text['background_red'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 0 * $info_png['IHDR']['raw']['bit_depth'], $info_png['IHDR']['raw']['bit_depth'])); 1.278 + $info_png_chunk_type_text['background_green'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 1 * $info_png['IHDR']['raw']['bit_depth'], $info_png['IHDR']['raw']['bit_depth'])); 1.279 + $info_png_chunk_type_text['background_blue'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 2 * $info_png['IHDR']['raw']['bit_depth'], $info_png['IHDR']['raw']['bit_depth'])); 1.280 + break; 1.281 + 1.282 + case 3: 1.283 + $info_png_chunk_type_text['background_index'] = getid3_lib::BigEndian2Int($chunk['data']); 1.284 + break; 1.285 + 1.286 + default: 1.287 + break; 1.288 + } 1.289 + break; 1.290 + 1.291 + 1.292 + case 'pHYs': // Physical Pixel Dimensions 1.293 + $info_png_chunk_type_text['header'] = $chunk; 1.294 + $info_png_chunk_type_text['pixels_per_unit_x'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 0, 4)); 1.295 + $info_png_chunk_type_text['pixels_per_unit_y'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 4, 4)); 1.296 + $info_png_chunk_type_text['unit_specifier'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 8, 1)); 1.297 + $info_png_chunk_type_text['unit'] = getid3_png::PNGpHYsUnitLookup($info_png_chunk_type_text['unit_specifier']); 1.298 + break; 1.299 + 1.300 + 1.301 + case 'sBIT': // Significant Bits 1.302 + $info_png_chunk_type_text['header'] = $chunk; 1.303 + switch ($info_png['IHDR']['raw']['color_type']) { 1.304 + case 0: 1.305 + $info_png_chunk_type_text['significant_bits_gray'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 0, 1)); 1.306 + break; 1.307 + 1.308 + case 2: 1.309 + case 3: 1.310 + $info_png_chunk_type_text['significant_bits_red'] = getid3_lib::BigEndian2Int($chunk['data'][0]); 1.311 + $info_png_chunk_type_text['significant_bits_green'] = getid3_lib::BigEndian2Int($chunk['data'][1]); 1.312 + $info_png_chunk_type_text['significant_bits_blue'] = getid3_lib::BigEndian2Int($chunk['data'][2]); 1.313 + break; 1.314 + 1.315 + case 4: 1.316 + $info_png_chunk_type_text['significant_bits_gray'] = getid3_lib::BigEndian2Int($chunk['data'][0]); 1.317 + $info_png_chunk_type_text['significant_bits_alpha'] = getid3_lib::BigEndian2Int($chunk['data'][1]); 1.318 + break; 1.319 + 1.320 + case 6: 1.321 + $info_png_chunk_type_text['significant_bits_red'] = getid3_lib::BigEndian2Int($chunk['data'][0]); 1.322 + $info_png_chunk_type_text['significant_bits_green'] = getid3_lib::BigEndian2Int($chunk['data'][1]); 1.323 + $info_png_chunk_type_text['significant_bits_blue'] = getid3_lib::BigEndian2Int($chunk['data'][2]); 1.324 + $info_png_chunk_type_text['significant_bits_alpha'] = getid3_lib::BigEndian2Int($chunk['data'][3]); 1.325 + break; 1.326 + 1.327 + default: 1.328 + break; 1.329 + } 1.330 + break; 1.331 + 1.332 + 1.333 + case 'sPLT': // Suggested Palette 1.334 + $info_png_chunk_type_text['header'] = $chunk; 1.335 + 1.336 + list($palettename, $otherdata) = explode("\x00", $chunk['data'], 2); 1.337 + $info_png_chunk_type_text['palette_name'] = $palettename; 1.338 + 1.339 + $info_png_chunk_type_text['sample_depth_bits'] = getid3_lib::BigEndian2Int($otherdata[0]); 1.340 + $info_png_chunk_type_text['sample_depth_bytes'] = $info_png_chunk_type_text['sample_depth_bits'] / 8; 1.341 + 1.342 + $s_plt_offset = 1; 1.343 + $paletteCounter = 0; 1.344 + while ($s_plt_offset < strlen($otherdata)) { 1.345 + 1.346 + $info_png_chunk_type_text['red'][$paletteCounter] = getid3_lib::BigEndian2Int(substr($otherdata, $s_plt_offset, $info_png_chunk_type_text['sample_depth_bytes'])); 1.347 + $s_plt_offset += $info_png_chunk_type_text['sample_depth_bytes']; 1.348 + 1.349 + $info_png_chunk_type_text['green'][$paletteCounter] = getid3_lib::BigEndian2Int(substr($otherdata, $s_plt_offset, $info_png_chunk_type_text['sample_depth_bytes'])); 1.350 + $s_plt_offset += $info_png_chunk_type_text['sample_depth_bytes']; 1.351 + 1.352 + $info_png_chunk_type_text['blue'][$paletteCounter] = getid3_lib::BigEndian2Int(substr($otherdata, $s_plt_offset, $info_png_chunk_type_text['sample_depth_bytes'])); 1.353 + $s_plt_offset += $info_png_chunk_type_text['sample_depth_bytes']; 1.354 + 1.355 + $info_png_chunk_type_text['alpha'][$paletteCounter] = getid3_lib::BigEndian2Int(substr($otherdata, $s_plt_offset, $info_png_chunk_type_text['sample_depth_bytes'])); 1.356 + $s_plt_offset += $info_png_chunk_type_text['sample_depth_bytes']; 1.357 + 1.358 + $info_png_chunk_type_text['frequency'][$paletteCounter] = getid3_lib::BigEndian2Int(substr($otherdata, $s_plt_offset, 2)); 1.359 + $s_plt_offset += 2; 1.360 + 1.361 + $paletteCounter++; 1.362 + } 1.363 + break; 1.364 + 1.365 + 1.366 + case 'hIST': // Palette Histogram 1.367 + $info_png_chunk_type_text['header'] = $chunk; 1.368 + $h_ist_counter = 0; 1.369 + while ($h_ist_counter < strlen($chunk['data'])) { 1.370 + $info_png_chunk_type_text[$h_ist_counter] = getid3_lib::BigEndian2Int(substr($chunk['data'], $h_ist_counter / 2, 2)); 1.371 + $h_ist_counter += 2; 1.372 + } 1.373 + break; 1.374 + 1.375 + 1.376 + case 'tIME': // Image Last-Modification Time 1.377 + $info_png_chunk_type_text['header'] = $chunk; 1.378 + $info_png_chunk_type_text['year'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 0, 2)); 1.379 + $info_png_chunk_type_text['month'] = getid3_lib::BigEndian2Int($chunk['data']{2}); 1.380 + $info_png_chunk_type_text['day'] = getid3_lib::BigEndian2Int($chunk['data']{3}); 1.381 + $info_png_chunk_type_text['hour'] = getid3_lib::BigEndian2Int($chunk['data']{4}); 1.382 + $info_png_chunk_type_text['minute'] = getid3_lib::BigEndian2Int($chunk['data']{5}); 1.383 + $info_png_chunk_type_text['second'] = getid3_lib::BigEndian2Int($chunk['data']{6}); 1.384 + $info_png_chunk_type_text['unix'] = gmmktime($info_png_chunk_type_text['hour'], $info_png_chunk_type_text['minute'], $info_png_chunk_type_text['second'], $info_png_chunk_type_text['month'], $info_png_chunk_type_text['day'], $info_png_chunk_type_text['year']); 1.385 + break; 1.386 + 1.387 + 1.388 + case 'oFFs': // Image Offset 1.389 + $info_png_chunk_type_text['header'] = $chunk; 1.390 + $info_png_chunk_type_text['position_x'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 0, 4), false, true); 1.391 + $info_png_chunk_type_text['position_y'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 4, 4), false, true); 1.392 + $info_png_chunk_type_text['unit_specifier'] = getid3_lib::BigEndian2Int($chunk['data'][8]); 1.393 + $info_png_chunk_type_text['unit'] = getid3_png::PNGoFFsUnitLookup($info_png_chunk_type_text['unit_specifier']); 1.394 + break; 1.395 + 1.396 + 1.397 + case 'pCAL': // Calibration Of Pixel Values 1.398 + $info_png_chunk_type_text['header'] = $chunk; 1.399 + list($calibrationname, $otherdata) = explode("\x00", $chunk['data'], 2); 1.400 + $info_png_chunk_type_text['calibration_name'] = $calibrationname; 1.401 + $info_png_chunk_type_text['original_zero'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 0, 4), false, true); 1.402 + $info_png_chunk_type_text['original_max'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 4, 4), false, true); 1.403 + $info_png_chunk_type_text['equation_type'] = getid3_lib::BigEndian2Int($chunk['data'][8]); 1.404 + $info_png_chunk_type_text['equation_type_text'] = getid3_png::PNGpCALequationTypeLookup($info_png_chunk_type_text['equation_type']); 1.405 + $info_png_chunk_type_text['parameter_count'] = getid3_lib::BigEndian2Int($chunk['data'][9]); 1.406 + $info_png_chunk_type_text['parameters'] = explode("\x00", substr($chunk['data'], 10)); 1.407 + break; 1.408 + 1.409 + 1.410 + case 'sCAL': // Physical Scale Of Image Subject 1.411 + $info_png_chunk_type_text['header'] = $chunk; 1.412 + $info_png_chunk_type_text['unit_specifier'] = getid3_lib::BigEndian2Int(substr($chunk['data'], 0, 1)); 1.413 + $info_png_chunk_type_text['unit'] = getid3_png::PNGsCALUnitLookup($info_png_chunk_type_text['unit_specifier']); 1.414 + list($info_png_chunk_type_text['pixel_width'], $info_png_chunk_type_text['pixel_height']) = explode("\x00", substr($chunk['data'], 1)); 1.415 + break; 1.416 + 1.417 + 1.418 + case 'gIFg': // GIF Graphic Control Extension 1.419 + $gIFg_counter = 0; 1.420 + if (isset($info_png_chunk_type_text) && is_array($info_png_chunk_type_text)) { 1.421 + $gIFg_counter = count($info_png_chunk_type_text); 1.422 + } 1.423 + $info_png_chunk_type_text[$gIFg_counter]['header'] = $chunk; 1.424 + $info_png_chunk_type_text[$gIFg_counter]['disposal_method'] = getid3_lib::BigEndian2Int($chunk['data'][0]); 1.425 + $info_png_chunk_type_text[$gIFg_counter]['user_input_flag'] = getid3_lib::BigEndian2Int($chunk['data'][1]); 1.426 + $info_png_chunk_type_text[$gIFg_counter]['delay_time'] = getid3_lib::BigEndian2Int($chunk['data'][2]); 1.427 + break; 1.428 + 1.429 + 1.430 + case 'gIFx': // GIF Application Extension 1.431 + $gIFx_counter = 0; 1.432 + if (isset($info_png_chunk_type_text) && is_array($info_png_chunk_type_text)) { 1.433 + $gIFx_counter = count($info_png_chunk_type_text); 1.434 + } 1.435 + $info_png_chunk_type_text[$gIFx_counter]['header'] = $chunk; 1.436 + $info_png_chunk_type_text[$gIFx_counter]['application_identifier'] = substr($chunk['data'], 0, 8); 1.437 + $info_png_chunk_type_text[$gIFx_counter]['authentication_code'] = substr($chunk['data'], 8, 3); 1.438 + $info_png_chunk_type_text[$gIFx_counter]['application_data'] = substr($chunk['data'], 11); 1.439 + break; 1.440 + 1.441 + 1.442 + case 'IDAT': // Image Data 1.443 + $idat_information_field_index = 0; 1.444 + if (isset($info_png['IDAT']) && is_array($info_png['IDAT'])) { 1.445 + $idat_information_field_index = count($info_png['IDAT']); 1.446 + } 1.447 + unset($chunk['data']); 1.448 + $info_png_chunk_type_text[$idat_information_field_index]['header'] = $chunk; 1.449 + break; 1.450 + 1.451 + 1.452 + case 'IEND': // Image Trailer 1.453 + $info_png_chunk_type_text['header'] = $chunk; 1.454 + break; 1.455 + 1.456 + 1.457 + default: 1.458 + $info_png_chunk_type_text['header'] = $chunk; 1.459 + $getid3->warning('Unhandled chunk type: '.$chunk['type_text']); 1.460 + break; 1.461 + } 1.462 + } 1.463 + 1.464 + return true; 1.465 + } 1.466 + 1.467 + 1.468 + 1.469 + public static function PNGsRGBintentLookup($sRGB) { 1.470 + 1.471 + static $lookup = array ( 1.472 + 0 => 'Perceptual', 1.473 + 1 => 'Relative colorimetric', 1.474 + 2 => 'Saturation', 1.475 + 3 => 'Absolute colorimetric' 1.476 + ); 1.477 + return (isset($lookup[$sRGB]) ? $lookup[$sRGB] : 'invalid'); 1.478 + } 1.479 + 1.480 + 1.481 + 1.482 + public static function PNGcompressionMethodLookup($compression_method) { 1.483 + 1.484 + return ($compression_method == 0 ? 'deflate/inflate' : 'invalid'); 1.485 + } 1.486 + 1.487 + 1.488 + 1.489 + public static function PNGpHYsUnitLookup($unit_id) { 1.490 + 1.491 + static $lookup = array ( 1.492 + 0 => 'unknown', 1.493 + 1 => 'meter' 1.494 + ); 1.495 + return (isset($lookup[$unit_id]) ? $lookup[$unit_id] : 'invalid'); 1.496 + } 1.497 + 1.498 + 1.499 + 1.500 + public static function PNGoFFsUnitLookup($unit_id) { 1.501 + 1.502 + static $lookup = array ( 1.503 + 0 => 'pixel', 1.504 + 1 => 'micrometer' 1.505 + ); 1.506 + return (isset($lookup[$unit_id]) ? $lookup[$unit_id] : 'invalid'); 1.507 + } 1.508 + 1.509 + 1.510 + 1.511 + public static function PNGpCALequationTypeLookup($equation_type) { 1.512 + 1.513 + static $lookup = array ( 1.514 + 0 => 'Linear mapping', 1.515 + 1 => 'Base-e exponential mapping', 1.516 + 2 => 'Arbitrary-base exponential mapping', 1.517 + 3 => 'Hyperbolic mapping' 1.518 + ); 1.519 + return (isset($lookup[$equation_type]) ? $lookup[$equation_type] : 'invalid'); 1.520 + } 1.521 + 1.522 + 1.523 + 1.524 + public static function PNGsCALUnitLookup($unit_id) { 1.525 + 1.526 + static $lookup = array ( 1.527 + 0 => 'meter', 1.528 + 1 => 'radian' 1.529 + ); 1.530 + return (isset($lookup[$unit_id]) ? $lookup[$unit_id] : 'invalid'); 1.531 + } 1.532 + 1.533 + 1.534 + 1.535 + public static function IHDRcalculateBitsPerSample($color_type, $bit_depth) { 1.536 + 1.537 + switch ($color_type) { 1.538 + case 0: // Each pixel is a grayscale sample. 1.539 + return $bit_depth; 1.540 + 1.541 + case 2: // Each pixel is an R,G,B triple 1.542 + return 3 * $bit_depth; 1.543 + 1.544 + case 3: // Each pixel is a palette index; a PLTE chunk must appear. 1.545 + return $bit_depth; 1.546 + 1.547 + case 4: // Each pixel is a grayscale sample, followed by an alpha sample. 1.548 + return 2 * $bit_depth; 1.549 + 1.550 + case 6: // Each pixel is an R,G,B triple, followed by an alpha sample. 1.551 + return 4 * $bit_depth; 1.552 + } 1.553 + return false; 1.554 + } 1.555 + 1.556 +} 1.557 + 1.558 + 1.559 +?> 1.560 \ No newline at end of file