includes/media/GIF.php

   1 <?php
   2 /**
   3  * @file
   4  * @ingroup Media
   5  */
   6
   7 /**
   8  * Handler for GIF images.
   9  *
  10  * @ingroup Media
  11  */
  12 class GIFHandler extends BitmapHandler {
  13
  14         function getMetadata( $image, $filename ) {
  15                 if ( !isset($image->parsedGIFMetadata) ) {
  16                         try {
  17                                 $image->parsedGIFMetadata = GIFMetadataExtractor::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->parsedGIFMetadata);
  26
  27         }
  28
  29         function formatMetadata( $image ) {
  30                 return false;
  31         }
  32
  33         function getImageArea( $image, $width, $height ) {
  34                 $ser = $image->getMetadata();
  35                 if ($ser) {
  36                         $metadata = unserialize($ser);
  37                         return $width * $height * $metadata['frameCount'];
  38                 } else {
  39                         return $width * $height;
  40                 }
  41         }
  42
  43         function isAnimatedImage( $image ) {
  44                 $ser = $image->getMetadata();
  45                 if ($ser) {
  46                         $metadata = unserialize($ser);
  47                         if( $metadata['frameCount'] > 1 ) return true;
  48                 }
  49                 return false;
  50         }
  51
  52         function getMetadataType( $image ) {
  53                 return 'parsed-gif';
  54         }
  55
  56         function isMetadataValid( $image, $metadata ) {
  57                 $data = @unserialize( $metadata );
  58                 return (boolean) $data;
  59         }
  60
  61         function getLongDesc( $image ) {
  62                 global $wgUser, $wgLang;
  63                 $sk = $wgUser->getSkin();
  64
  65                 $metadata = @unserialize($image->getMetadata());
  66
  67                 if (!$metadata) return parent::getLongDesc( $image );
  68
  69                 $info = array();
  70                 $info[] = $image->getMimeType();
  71                 $info[] = $sk->formatSize( $image->getSize() );
  72
  73                 if ($metadata['looped'])
  74                         $info[] = wfMsgExt( 'file-info-gif-looped', 'parseinline' );
  75
  76                 if ($metadata['frameCount'] > 1)
  77                         $info[] = wfMsgExt( 'file-info-gif-frames', 'parseinline', $metadata['frameCount'] );
  78
  79                 if ($metadata['duration'])
  80                         $info[] = $wgLang->formatTimePeriod( $metadata['duration'] );
  81
  82                 $infoString = $wgLang->commaList( $info );
  83
  84                 return "($infoString)";
  85         }
  86 }