mirror of
https://github.com/gtbu/Typesetter-5.3-p8.git
synced 2024-11-11 01:44:02 +01:00
235 lines
5.5 KiB
PHP
235 lines
5.5 KiB
PHP
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<?php
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namespace gp\tool{
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defined('is_running') or die('Not an entry point...');
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/*
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* based on parts from
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* WP Improved GD Image Editor by Marko Heijnen
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* iptc_make_tag() function by Thies C. Arntzen
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* wp_read_image_metadata() by WordPress developers
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*/
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class ImageMeta {
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static $file = null;
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static $meta_exif = array();
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static $meta_iptc = array();
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public static function getMeta($img_path){
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self::$file = $img_path;
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$meta = array(
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'created_date' => date('Ymd'),
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'created_time' => date('His') . '+0000',
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'title' => '',
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'credit' => '',
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'copyright' => '',
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'caption' => '',
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'errors' => array(),
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);
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if( is_callable('iptcparse') ){
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self::metaFromIptc();
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$meta = array_merge($meta, self::$meta_iptc);
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}else{
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$meta['errors'][] = 'iptcparse not callable';
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}
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if( is_callable('exif_read_data') ){
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self::metaFromExif();
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$meta = array_merge($meta, self::$meta_exif);
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}else{
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$meta['errors'][] = 'exif_read_data not callable';
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}
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foreach( $meta as $key => $value){
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// self::$meta[$key] = \gp\tool\Editing::Sanitize($value);
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}
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return $meta;
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}
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public static function saveMeta($img_path, $meta){
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$tags = array(
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"created_date" => "055",
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"created_time" => "060",
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"credit" => "080",
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"title" => "105",
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"copyright" => "116",
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"caption" => "120",
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);
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if( !is_callable('iptcembed') ){
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return false;
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}
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$bin_data = "";
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foreach( $tags as $tag => $data ){
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$bin_data .= self::makeTag(2, $data, $meta[$tag]);
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}
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$content = iptcembed($bin_data, $img_path, 0);
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if( file_exists($img_path) ){
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unlink($img_path);
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}
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$fp = fopen($img_path, "w");
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$result = fwrite($fp, $content);
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fclose($fp);
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return $result;
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}
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private static function makeTag($rec, $data, $value){
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$length = strlen($value);
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$retval = chr(0x1C) . chr($rec) . chr($data);
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if( $length < 0x8000 ){
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$retval .= chr($length >> 8) . chr($length & 0xFF);
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}else{
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$retval .= chr(0x80)
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. chr(0x04)
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. chr(($length >> 24) & 0xFF)
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. chr(($length >> 16) & 0xFF)
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. chr(($length >> 8) & 0xFF)
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. chr($length & 0xFF);
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}
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return $retval . $value;
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}
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private static function metaFromIptc(){
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$meta = array(
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'iptc_errors' => array(),
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);
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$size = getimagesize(self::$file, $info);
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if( empty($info['APP13']) ){
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$meta['iptc_errors'][] = 'APP13 section is empty';
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self::$meta_iptc = $meta;
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return false;
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}
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$iptc = iptcparse( $info['APP13'] );
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if( !$iptc ){
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$meta['iptc_errors'][] = 'iptcparse of APP13 section returns false';
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self::$meta_iptc = $meta;
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return false;
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}
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// headline
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if( !empty($iptc['2#105'][0]) ){
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$meta['title'] = trim($iptc['2#105'][0]);
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}elseif( !empty($iptc['2#005'][0]) ){
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$meta['title'] = trim( $iptc['2#005'][0]);
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}
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// description
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if( !empty($iptc['2#120'][0]) ){
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$caption = trim($iptc['2#120'][0]);
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$caption_length = strlen(bin2hex($caption)) / 2;
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if( empty($meta['title']) && $caption_length < 80 ){
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$meta['title'] = $caption;
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}
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$meta['caption'] = $caption;
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}
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// credit/creator
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if( !empty($iptc['2#110'][0]) ){ // credit
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$meta['credit'] = trim($iptc['2#110'][0]);
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}elseif( !empty($iptc['2#080'][0]) ){ // creator/legacy byline
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$meta['credit'] = trim($iptc['2#080'][0]);
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}
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// created date and time
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if( !empty($iptc['2#055'][0]) && !empty($iptc['2#060'][0]) ){
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$meta['created_date'] = $iptc['2#055'][0];
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$meta['created_time'] = $iptc['2#060'][0];
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}
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// copyright
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if( !empty($iptc['2#116'][0]) ){
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$meta['copyright'] = trim($iptc['2#116'][0]);
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}
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self::$meta_iptc = $meta;
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return true;
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}
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private static function metaFromExif(){
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$meta = array(
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'exif_errors' => array(),
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);
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$exif = @exif_read_data(self::$file);
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if( !$exif ){
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$meta['exif_errors'][] = 'exif_read_data returns false';
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self::$meta_exif = $meta;
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return false;
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}
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if( !empty($exif['ImageDescription']) ){
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$description_length = strlen(bin2hex($exif['ImageDescription'])) / 2;
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if( empty($meta['title']) && $description_length < 80 ){
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$meta['title'] = trim($exif['ImageDescription']);
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}
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if( empty($meta['caption']) && !empty($exif['COMPUTED']['UserComment']) ){
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$meta['caption'] = trim($exif['COMPUTED']['UserComment']);
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}
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if( empty($meta['caption']) ){
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$meta['caption'] = trim($exif['ImageDescription']);
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}
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}elseif( empty($meta['caption']) && !empty($exif['Comments']) ){
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$meta['caption'] = trim($exif['Comments']);
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}
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if( empty($meta['credit']) ){
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if( !empty($exif['Artist']) ){
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$meta['credit'] = trim($exif['Artist']);
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}elseif( !empty($exif['Author']) ){
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$meta['credit'] = trim($exif['Author']);
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}
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}
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if( !empty($exif['Copyright']) ){
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$meta['copyright'] = trim($exif['Copyright']);
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}
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if( !empty($exif['DateTimeDigitized']) ){
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$exif_date = $exif['DateTimeDigitized'];
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@list($date, $time) = explode(' ', trim($exif_date));
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@list($y, $m, $d) = explode(':', $date);
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@list($h, $i, $s) = explode(':', $time);
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$meta['created_date'] = $y . $m . $d; // YYYYMMDD
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$meta['created_time'] = $h . $i . $s . '+0000'; // HHMMSS+TZO
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}
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if( function_exists('mb_detect_encoding') ){
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foreach( $meta as $key => $value ){
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if( !is_array($value) && !mb_detect_encoding($value, 'UTF-8', true) ){
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$meta[$key] = utf8_encode($value);
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}
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}
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}
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self::$meta_exif = $meta;
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return true;
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}
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}
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}
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