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         /**
  36          * @param $image File
  37          * @return bool
  38          */
  39         function isAnimatedImage( $image ) {
  40                 $ser = $image->getMetadata();
  41                 if ($ser) {
  42                         $metadata = unserialize($ser);
  43                         if( $metadata['frameCount'] > 1 ) return true;
  44                 }
  45                 return false;
  46         }
  47
  48         function getMetadataType( $image ) {
  49                 return 'parsed-png';
  50         }
  51
  52         function isMetadataValid( $image, $metadata ) {
  53                 wfSuppressWarnings();
  54                 $data = unserialize( $metadata );
  55                 wfRestoreWarnings();
  56                 return (boolean) $data;
  57         }
  58
  59         /**
  60          * @param $image File
  61          * @return string
  62          */
  63         function getLongDesc( $image ) {
  64                 global $wgLang;
  65                 $original = parent::getLongDesc( $image );
  66
  67                 wfSuppressWarnings();
  68                 $metadata = unserialize($image->getMetadata());
  69                 wfRestoreWarnings();
  70
  71                 if( !$metadata || $metadata['frameCount'] <= 0 )
  72                         return $original;
  73
  74                 $info = array();
  75                 $info[] = $original;
  76
  77                 if ($metadata['loopCount'] == 0)
  78                         $info[] = wfMsgExt( 'file-info-png-looped', 'parseinline' );
  79                 elseif ($metadata['loopCount'] > 1)
  80                         $info[] = wfMsgExt( 'file-info-png-repeat', 'parseinline', $metadata['loopCount'] );
  81
  82                 if ($metadata['frameCount'] > 0)
  83                         $info[] = wfMsgExt( 'file-info-png-frames', 'parseinline', $metadata['frameCount'] );
  84
  85                 if ($metadata['duration'])
  86                         $info[] = $wgLang->formatTimePeriod( $metadata['duration'] );
  87
  88                 return $wgLang->commaList( $info );
  89         }
  90
  91 }