/**
* Handler for PNG images.
*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
* @file
* @ingroup Media
*/
* @ingroup Media
*/
class PNGHandler extends BitmapHandler {
-
+ const BROKEN_FILE = '0';
+
+ /**
+ * @param File|FSFile $image
+ * @param string $filename
+ * @return string
+ */
function getMetadata( $image, $filename ) {
- if ( !isset($image->parsedPNGMetadata) ) {
- try {
- $image->parsedPNGMetadata = PNGMetadataExtractor::getMetadata( $filename );
- } catch( Exception $e ) {
- // Broken file?
- wfDebug( __METHOD__ . ': ' . $e->getMessage() . "\n" );
- return '0';
- }
+ try {
+ $metadata = BitmapMetadataHandler::PNG( $filename );
+ } catch ( Exception $e ) {
+ // Broken file?
+ wfDebug( __METHOD__ . ': ' . $e->getMessage() . "\n" );
+
+ return self::BROKEN_FILE;
}
- return serialize($image->parsedPNGMetadata);
+ return serialize( $metadata );
+ }
+
+ /**
+ * @param File $image
+ * @param bool|IContextSource $context Context to use (optional)
+ * @return array|bool
+ */
+ function formatMetadata( $image, $context = false ) {
+ $meta = $this->getCommonMetaArray( $image );
+ if ( count( $meta ) === 0 ) {
+ return false;
+ }
+ return $this->formatMetadataHelper( $meta, $context );
}
-
- function formatMetadata( $image ) {
- return false;
+
+ /**
+ * Get a file type independent array of metadata.
+ *
+ * @param File $image
+ * @return array The metadata array
+ */
+ public function getCommonMetaArray( File $image ) {
+ $meta = $image->getMetadata();
+
+ if ( !$meta ) {
+ return [];
+ }
+ $meta = unserialize( $meta );
+ if ( !isset( $meta['metadata'] ) ) {
+ return [];
+ }
+ unset( $meta['metadata']['_MW_PNG_VERSION'] );
+
+ return $meta['metadata'];
}
-
+
+ /**
+ * @param File $image
+ * @return bool
+ */
function isAnimatedImage( $image ) {
$ser = $image->getMetadata();
- if ($ser) {
- $metadata = unserialize($ser);
- if( $metadata['frameCount'] > 1 ) return true;
+ if ( $ser ) {
+ $metadata = unserialize( $ser );
+ if ( $metadata['frameCount'] > 1 ) {
+ return true;
+ }
}
+
return false;
}
-
+
+ /**
+ * We do not support making APNG thumbnails, so always false
+ * @param File $image
+ * @return bool False
+ */
+ function canAnimateThumbnail( $image ) {
+ return false;
+ }
+
function getMetadataType( $image ) {
return 'parsed-png';
}
-
+
function isMetadataValid( $image, $metadata ) {
- wfSuppressWarnings();
+ if ( $metadata === self::BROKEN_FILE ) {
+ // Do not repetitivly regenerate metadata on broken file.
+ return self::METADATA_GOOD;
+ }
+
+ MediaWiki\suppressWarnings();
$data = unserialize( $metadata );
- wfRestoreWarnings();
- return (boolean) $data;
+ MediaWiki\restoreWarnings();
+
+ if ( !$data || !is_array( $data ) ) {
+ wfDebug( __METHOD__ . " invalid png metadata\n" );
+
+ return self::METADATA_BAD;
+ }
+
+ if ( !isset( $data['metadata']['_MW_PNG_VERSION'] )
+ || $data['metadata']['_MW_PNG_VERSION'] != PNGMetadataExtractor::VERSION
+ ) {
+ wfDebug( __METHOD__ . " old but compatible png metadata\n" );
+
+ return self::METADATA_COMPATIBLE;
+ }
+
+ return self::METADATA_GOOD;
}
+
+ /**
+ * @param File $image
+ * @return string
+ */
function getLongDesc( $image ) {
global $wgLang;
$original = parent::getLongDesc( $image );
- wfSuppressWarnings();
- $metadata = unserialize($image->getMetadata());
- wfRestoreWarnings();
+ MediaWiki\suppressWarnings();
+ $metadata = unserialize( $image->getMetadata() );
+ MediaWiki\restoreWarnings();
- if( !$metadata || $metadata['frameCount'] <= 0 )
+ if ( !$metadata || $metadata['frameCount'] <= 0 ) {
return $original;
+ }
- $info = array();
+ $info = [];
$info[] = $original;
-
- if ($metadata['loopCount'] == 0)
- $info[] = wfMsgExt( 'file-info-png-looped', 'parseinline' );
- elseif ($metadata['loopCount'] > 1)
- $info[] = wfMsgExt( 'file-info-png-repeat', 'parseinline', $metadata['loopCount'] );
-
- if ($metadata['frameCount'] > 0)
- $info[] = wfMsgExt( 'file-info-png-frames', 'parseinline', $metadata['frameCount'] );
-
- if ($metadata['duration'])
+
+ if ( $metadata['loopCount'] == 0 ) {
+ $info[] = wfMessage( 'file-info-png-looped' )->parse();
+ } elseif ( $metadata['loopCount'] > 1 ) {
+ $info[] = wfMessage( 'file-info-png-repeat' )->numParams( $metadata['loopCount'] )->parse();
+ }
+
+ if ( $metadata['frameCount'] > 0 ) {
+ $info[] = wfMessage( 'file-info-png-frames' )->numParams( $metadata['frameCount'] )->parse();
+ }
+
+ if ( $metadata['duration'] ) {
$info[] = $wgLang->formatTimePeriod( $metadata['duration'] );
-
+ }
+
return $wgLang->commaList( $info );
}
+ /**
+ * Return the duration of an APNG file.
+ *
+ * Shown in the &query=imageinfo&iiprop=size api query.
+ *
+ * @param File $file
+ * @return float The duration of the file.
+ */
+ public function getLength( $file ) {
+ $serMeta = $file->getMetadata();
+ MediaWiki\suppressWarnings();
+ $metadata = unserialize( $serMeta );
+ MediaWiki\restoreWarnings();
+
+ if ( !$metadata || !isset( $metadata['duration'] ) || !$metadata['duration'] ) {
+ return 0.0;
+ } else {
+ return (float)$metadata['duration'];
+ }
+ }
+
+ // PNGs should be easy to support, but it will need some sharpening applied
+ // and another user test to check if the perceived quality change is noticeable
+ public function supportsBucketing() {
+ return false;
+ }
}
scripts.mit.edu / autoinstallsdev / mediawiki.git / blobdiff