includes/media/PNG.php

   1 <?php
   2 /**
   3  * @file
   4  * @ingroup Media
   5  */
   6
   7 /**
   8  * Handler for PNG images.
   9  *
  10  * @ingroup Media
  11  */
  12 class PNGHandler extends BitmapHandler {
  13
  14         function getMetadata( $image, $filename ) {
  15                 if ( !isset($image->parsedPNGMetadata) ) {
  16                         try {
  17                                 $image->parsedPNGMetadata = PNGMetadataExtractor::getMetadata( $filename );
  18                         } catch( Exception $e ) {
  19                                 // Broken file?
  20                                 wfDebug( __METHOD__ . ': ' . $e->getMessage() . "\n" );
  21                                 return '0';
  22                         }
  23                 }
  24
  25                 return serialize($image->parsedPNGMetadata);
  26
  27         }
  28
  29         function formatMetadata( $image ) {
  30                 return false;
  31         }
  32
  33         function isAnimatedImage( $image ) {
  34                 $ser = $image->getMetadata();
  35                 if ($ser) {
  36                         $metadata = unserialize($ser);
  37                         if( $metadata['frameCount'] > 1 ) return true;
  38                 }
  39                 return false;
  40         }
  41
  42         function getMetadataType( $image ) {
  43                 return 'parsed-png';
  44         }
  45
  46         function isMetadataValid( $image, $metadata ) {
  47                 wfSuppressWarnings();
  48                 $data = unserialize( $metadata );
  49                 wfRestoreWarnings();
  50                 return (boolean) $data;
  51         }
  52         function getLongDesc( $image ) {
  53                 global $wgLang;
  54                 $original = parent::getLongDesc( $image );
  55
  56                 wfSuppressWarnings();
  57                 $metadata = unserialize($image->getMetadata());
  58                 wfRestoreWarnings();
  59
  60                 if( !$metadata || $metadata['frameCount'] <= 0 )
  61                         return $original;
  62
  63                 $info = array();
  64                 $info[] = substr( $original, 1, strlen( $original )-2 );
  65
  66                 if ($metadata['loopCount'] == 0)
  67                         $info[] = wfMsgExt( 'file-info-png-looped', 'parseinline' );
  68                 elseif ($metadata['loopCount'] > 1)
  69                         $info[] = wfMsgExt( 'file-info-png-repeat', 'parseinline', $metadata['loopCount'] );;
  70
  71                 if ($metadata['frameCount'] > 0)
  72                         $info[] = wfMsgExt( 'file-info-png-frames', 'parseinline', $metadata['frameCount'] );
  73
  74                 if ($metadata['duration'])
  75                         $info[] = $wgLang->formatTimePeriod( $metadata['duration'] );
  76
  77                 $infoString = $wgLang->commaList( $info );
  78
  79                 return "($infoString)";
  80         }
  81
  82 }