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387
dotclear._no/inc/libs/clearbricks/image/class.image.meta.php
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387
dotclear._no/inc/libs/clearbricks/image/class.image.meta.php
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<?php
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/**
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* @class imageMeta
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* @brief Image metadata
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*
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* This class reads EXIF, IPTC and XMP metadata from a JPEG file.
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*
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* - Contributor: Mathieu Lecarme.
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*
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* @package Clearbricks
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* @subpackage Images
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*
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* @copyright Olivier Meunier & Association Dotclear
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* @copyright GPL-2.0-only
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*/
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class imageMeta
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{
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protected $xmp = []; ///< array: Internal XMP array
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protected $iptc = []; ///< array: Internal IPTC array
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protected $exif = []; ///< array: Internal EXIF array
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/**
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* Read metadata
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*
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* Returns all image metadata in an array as defined in {@link $properties}.
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*
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* @param string $f Image file path
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* @return array
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*/
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public static function readMeta($f)
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{
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$o = new self;
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$o->loadFile($f);
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return $o->getMeta();
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}
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/**
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* Get metadata
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*
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* Returns all image metadata in an array as defined in {@link $properties}.
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* Should call {@link loadFile()} before.
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*
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* @return array
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*/
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public function getMeta()
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{
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foreach ($this->properties as $k => $v) {
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if (!empty($this->xmp[$k])) {
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$this->properties[$k] = $this->xmp[$k];
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} elseif (!empty($this->iptc[$k])) {
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$this->properties[$k] = $this->iptc[$k];
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} elseif (!empty($this->exif[$k])) {
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$this->properties[$k] = $this->exif[$k];
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}
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}
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# Fix date format
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$this->properties['DateTimeOriginal'] = preg_replace(
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'/^(\d{4}):(\d{2}):(\d{2})/', '$1-$2-$3',
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$this->properties['DateTimeOriginal']
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);
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return $this->properties;
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}
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/**
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* Load file
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*
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* Loads a file and read its metadata.
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*
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* @param string $f Image file path
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*/
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public function loadFile($f)
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{
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if (!is_file($f) || !is_readable($f)) {
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throw new Exception('Unable to read file');
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}
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$this->readXMP($f);
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$this->readIPTC($f);
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$this->readExif($f);
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}
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/**
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* Read XMP
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*
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* Reads XML metadata and assigns values to {@link $xmp}.
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*
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* @param string $f Image file path
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*/
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protected function readXMP($f)
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{
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if (($fp = @fopen($f, 'rb')) === false) {
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throw new Exception('Unable to open image file');
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}
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$inside = false;
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$done = false;
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$xmp = null;
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while (!feof($fp)) {
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$buffer = fgets($fp, 4096);
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$xmp_start = strpos($buffer, '<x:xmpmeta');
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if ($xmp_start !== false) {
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$buffer = substr($buffer, $xmp_start);
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$inside = true;
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}
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if ($inside) {
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$xmp_end = strpos($buffer, '</x:xmpmeta>');
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if ($xmp_end !== false) {
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$buffer = substr($buffer, $xmp_end, 12);
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$inside = false;
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$done = true;
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}
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$xmp .= $buffer;
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}
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if ($done) {
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break;
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}
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}
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fclose($fp);
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if (!$xmp) {
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return;
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}
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foreach ($this->xmp_reg as $code => $patterns) {
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foreach ($patterns as $p) {
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if (preg_match($p, $xmp, $m)) {
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$this->xmp[$code] = $m[1];
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break;
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}
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}
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}
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if (preg_match('%<dc:subject>\s*<rdf:Bag>(.+?)</rdf:Bag%msu', $xmp, $m)
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&& preg_match_all('%<rdf:li>(.+?)</rdf:li>%msu', $m[1], $m)) {
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$this->xmp['Keywords'] = implode(',', $m[1]);
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}
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foreach ($this->xmp as $k => $v) {
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$this->xmp[$k] = html::decodeEntities(text::toUTF8($v));
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}
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}
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/**
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* Read IPTC
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*
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* Reads IPTC metadata and assigns values to {@link $iptc}.
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*
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* @param string $f Image file path
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*/
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protected function readIPTC($f)
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{
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if (!function_exists('iptcparse')) {
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return;
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}
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$imageinfo = null;
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@getimagesize($f, $imageinfo);
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if (!is_array($imageinfo) || !isset($imageinfo['APP13'])) {
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return;
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}
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$iptc = @iptcparse($imageinfo['APP13']);
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if (!is_array($iptc)) {
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return;
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}
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foreach ($this->iptc_ref as $k => $v) {
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if (isset($iptc[$k]) && isset($this->iptc_to_property[$v])) {
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$this->iptc[$this->iptc_to_property[$v]] = text::toUTF8(trim(implode(',', $iptc[$k])));
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}
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}
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}
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/**
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* Read EXIF
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*
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* Reads EXIF metadata and assigns values to {@link $exif}.
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*
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* @param string $f Image file path
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*/
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protected function readEXIF($f)
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{
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if (!function_exists('exif_read_data')) {
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return;
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}
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$d = @exif_read_data($f, 'ANY_TAG');
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if (!is_array($d)) {
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return;
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}
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foreach ($this->exif_to_property as $k => $v) {
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if (isset($d[$k])) {
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if (is_array($d[$k])) {
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foreach ($d[$k] as $kk => $vv) {
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$this->exif[$v . '.' . $kk] = text::toUTF8($vv);
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}
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} else {
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$this->exif[$v] = text::toUTF8($d[$k]);
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}
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}
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}
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}
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/**
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* array $properties Final properties array
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*/
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protected $properties = [
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'Title' => null,
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'Description' => null,
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'Creator' => null,
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'Rights' => null,
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'Make' => null,
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'Model' => null,
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'Exposure' => null,
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'FNumber' => null,
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'MaxApertureValue' => null,
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'ExposureProgram' => null,
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'ISOSpeedRatings' => null,
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'DateTimeOriginal' => null,
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'ExposureBiasValue' => null,
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'MeteringMode' => null,
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'FocalLength' => null,
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'Lens' => null,
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'CountryCode' => null,
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'Country' => null,
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'State' => null,
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'City' => null,
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'Keywords' => null
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];
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# XMP
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protected $xmp_reg = [
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'Title' => [
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'%<dc:title>\s*<rdf:Alt>\s*<rdf:li.*?>(.+?)</rdf:li>%msu'
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],
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'Description' => [
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'%<dc:description>\s*<rdf:Alt>\s*<rdf:li.*?>(.+?)</rdf:li>%msu'
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],
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'Creator' => [
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'%<dc:creator>\s*<rdf:Seq>\s*<rdf:li>(.+?)</rdf:li>%msu'
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],
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'Rights' => [
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'%<dc:rights>\s*<rdf:Alt>\s*<rdf:li.*?>(.+?)</rdf:li>%msu'
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],
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'Make' => [
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'%<tiff:Make>(.+?)</tiff:Make>%msu',
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'%tiff:Make="(.+?)"%msu'
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],
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'Model' => [
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'%<tiff:Model>(.+?)</tiff:Model>%msu',
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'%tiff:Model="(.+?)"%msu'
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],
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'Exposure' => [
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'%<exif:ExposureTime>(.+?)</exif:ExposureTime>%msu',
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'%exif:ExposureTime="(.+?)"%msu'
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],
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'FNumber' => [
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'%<exif:FNumber>(.+?)</exif:FNumber>%msu',
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'%exif:FNumber="(.+?)"%msu'
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],
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'MaxApertureValue' => [
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'%<exif:MaxApertureValue>(.+?)</exif:MaxApertureValue>%msu',
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'%exif:MaxApertureValue="(.+?)"%msu'
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],
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'ExposureProgram' => [
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'%<exif:ExposureProgram>(.+?)</exif:ExposureProgram>%msu',
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'%exif:ExposureProgram="(.+?)"%msu'
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],
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'ISOSpeedRatings' => [
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'%<exif:ISOSpeedRatings>\s*<rdf:Seq>\s*<rdf:li>(.+?)</rdf:li>%msu'
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],
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'DateTimeOriginal' => [
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'%<exif:DateTimeOriginal>(.+?)</exif:DateTimeOriginal>%msu',
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'%exif:DateTimeOriginal="(.+?)"%msu'
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],
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'ExposureBiasValue' => [
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'%<exif:ExposureBiasValue>(.+?)</exif:ExposureBiasValue>%msu',
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'%exif:ExposureBiasValue="(.+?)"%msu'
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],
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'MeteringMode' => [
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'%<exif:MeteringMode>(.+?)</exif:MeteringMode>%msu',
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'%exif:MeteringMode="(.+?)"%msu'
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],
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'FocalLength' => [
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'%<exif:FocalLength>(.+?)</exif:FocalLength>%msu',
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'%exif:FocalLength="(.+?)"%msu'
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],
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'Lens' => [
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'%<aux:Lens>(.+?)</aux:Lens>%msu',
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'%aux:Lens="(.+?)"%msu'
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],
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'CountryCode' => [
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'%<Iptc4xmpCore:CountryCode>(.+?)</Iptc4xmpCore:CountryCode>%msu',
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'%Iptc4xmpCore:CountryCode="(.+?)"%msu'
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],
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'Country' => [
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'%<photoshop:Country>(.+?)</photoshop:Country>%msu',
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'%photoshop:Country="(.+?)"%msu'
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],
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'State' => [
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'%<photoshop:State>(.+?)</photoshop:State>%msu',
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'%photoshop:State="(.+?)"%msu'
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],
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'City' => [
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'%<photoshop:City>(.+?)</photoshop:City>%msu',
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'%photoshop:City="(.+?)"%msu'
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]
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];
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# IPTC
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protected $iptc_ref = [
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'1#090' => 'Iptc.Envelope.CharacterSet', // Character Set used (32 chars max)
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'2#005' => 'Iptc.ObjectName', // Title (64 chars max)
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'2#015' => 'Iptc.Category', // (3 chars max)
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'2#020' => 'Iptc.Supplementals', // Supplementals categories (32 chars max)
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'2#025' => 'Iptc.Keywords', // (64 chars max)
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'2#040' => 'Iptc.SpecialsInstructions', // (256 chars max)
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'2#055' => 'Iptc.DateCreated', // YYYYMMDD (8 num chars max)
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'2#060' => 'Iptc.TimeCreated', // HHMMSS+/-HHMM (11 chars max)
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'2#062' => 'Iptc.DigitalCreationDate', // YYYYMMDD (8 num chars max)
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'2#063' => 'Iptc.DigitalCreationTime', // HHMMSS+/-HHMM (11 chars max)
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'2#080' => 'Iptc.ByLine', // Author (32 chars max)
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'2#085' => 'Iptc.ByLineTitle', // Author position (32 chars max)
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'2#090' => 'Iptc.City', // (32 chars max)
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'2#092' => 'Iptc.Sublocation', // (32 chars max)
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'2#095' => 'Iptc.ProvinceState', // (32 chars max)
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'2#100' => 'Iptc.CountryCode', // (32 alpha chars max)
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'2#101' => 'Iptc.CountryName', // (64 chars max)
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'2#105' => 'Iptc.Headline', // (256 chars max)
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'2#110' => 'Iptc.Credits', // (32 chars max)
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'2#115' => 'Iptc.Source', // (32 chars max)
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'2#116' => 'Iptc.Copyright', // Copyright Notice (128 chars max)
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'2#118' => 'Iptc.Contact', // (128 chars max)
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'2#120' => 'Iptc.Caption', // Caption/Abstract (2000 chars max)
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'2#122' => 'Iptc.CaptionWriter' // Caption Writer/Editor (32 chars max)
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];
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protected $iptc_to_property = [
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'Iptc.ObjectName' => 'Title',
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'Iptc.Caption' => 'Description',
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'Iptc.ByLine' => 'Creator',
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'Iptc.Copyright' => 'Rights',
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'Iptc.CountryCode' => 'CountryCode',
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'Iptc.CountryName' => 'Country',
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'Iptc.ProvinceState' => 'State',
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'Iptc.City' => 'City',
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'Iptc.Keywords' => 'Keywords'
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];
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# EXIF
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protected $exif_to_property = [
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//'' => 'Title',
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'ImageDescription' => 'Description',
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'Artist' => 'Creator',
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'Copyright' => 'Rights',
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'Make' => 'Make',
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'Model' => 'Model',
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'ExposureTime' => 'Exposure',
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'FNumber' => 'FNumber',
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'MaxApertureValue' => 'MaxApertureValue',
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'ExposureProgram' => 'ExposureProgram',
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'ISOSpeedRatings' => 'ISOSpeedRatings',
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'DateTimeOriginal' => 'DateTimeOriginal',
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'ExposureBiasValue' => 'ExposureBiasValue',
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'MeteringMode' => 'MeteringMode',
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'FocalLength' => 'FocalLength'
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//'' => 'Lens',
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//'' => 'CountryCode',
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//'' => 'Country',
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//'' => 'State',
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//'' => 'City',
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//'' => 'Keywords'
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];
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}
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