includes/media/PNG.php

   1 <?php
   2 /**
   3  * Handler for PNG images.
   4  *
   5  * @file
   6  * @ingroup Media
   7  */
   8
   9 /**
  10  * Handler for PNG images.
  11  *
  12  * @ingroup Media
  13  */
  14 class PNGHandler extends BitmapHandler {
  15
  16         function getMetadata( $image, $filename ) {
  17                 if ( !isset($image->parsedPNGMetadata) ) {
  18                         try {
  19                                 $image->parsedPNGMetadata = PNGMetadataExtractor::getMetadata( $filename );
  20                         } catch( Exception $e ) {
  21                                 // Broken file?
  22                                 wfDebug( __METHOD__ . ': ' . $e->getMessage() . "\n" );
  23                                 return '0';
  24                         }
  25                 }
  26
  27                 return serialize($image->parsedPNGMetadata);
  28
  29         }
  30
  31         function formatMetadata( $image ) {
  32                 return false;
  33         }
  34
  35         function isAnimatedImage( $image ) {
  36                 $ser = $image->getMetadata();
  37                 if ($ser) {
  38                         $metadata = unserialize($ser);
  39                         if( $metadata['frameCount'] > 1 ) return true;
  40                 }
  41                 return false;
  42         }
  43
  44         function getMetadataType( $image ) {
  45                 return 'parsed-png';
  46         }
  47
  48         function isMetadataValid( $image, $metadata ) {
  49                 wfSuppressWarnings();
  50                 $data = unserialize( $metadata );
  51                 wfRestoreWarnings();
  52                 return (boolean) $data;
  53         }
  54         function getLongDesc( $image ) {
  55                 global $wgLang;
  56                 $original = parent::getLongDesc( $image );
  57
  58                 wfSuppressWarnings();
  59                 $metadata = unserialize($image->getMetadata());
  60                 wfRestoreWarnings();
  61
  62                 if( !$metadata || $metadata['frameCount'] <= 0 )
  63                         return $original;
  64
  65                 $info = array();
  66                 $info[] = substr( $original, 1, strlen( $original )-2 );
  67
  68                 if ($metadata['loopCount'] == 0)
  69                         $info[] = wfMsgExt( 'file-info-png-looped', 'parseinline' );
  70                 elseif ($metadata['loopCount'] > 1)
  71                         $info[] = wfMsgExt( 'file-info-png-repeat', 'parseinline', $metadata['loopCount'] );;
  72
  73                 if ($metadata['frameCount'] > 0)
  74                         $info[] = wfMsgExt( 'file-info-png-frames', 'parseinline', $metadata['frameCount'] );
  75
  76                 if ($metadata['duration'])
  77                         $info[] = $wgLang->formatTimePeriod( $metadata['duration'] );
  78
  79                 $infoString = $wgLang->commaList( $info );
  80
  81                 return "($infoString)";
  82         }
  83
  84 }