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         /**
  17          * @param File $image
  18          * @param string $filename
  19          * @return string
  20          */
  21         function getMetadata( $image, $filename ) {
  22                 if ( !isset($image->parsedPNGMetadata) ) {
  23                         try {
  24                                 $image->parsedPNGMetadata = PNGMetadataExtractor::getMetadata( $filename );
  25                         } catch( Exception $e ) {
  26                                 // Broken file?
  27                                 wfDebug( __METHOD__ . ': ' . $e->getMessage() . "\n" );
  28                                 return '0';
  29                         }
  30                 }
  31
  32                 return serialize($image->parsedPNGMetadata);
  33
  34         }
  35
  36         function formatMetadata( $image ) {
  37                 return false;
  38         }
  39
  40         /**
  41          * @param $image File
  42          * @return bool
  43          */
  44         function isAnimatedImage( $image ) {
  45                 $ser = $image->getMetadata();
  46                 if ($ser) {
  47                         $metadata = unserialize($ser);
  48                         if( $metadata['frameCount'] > 1 ) return true;
  49                 }
  50                 return false;
  51         }
  52
  53         function getMetadataType( $image ) {
  54                 return 'parsed-png';
  55         }
  56
  57         function isMetadataValid( $image, $metadata ) {
  58                 wfSuppressWarnings();
  59                 $data = unserialize( $metadata );
  60                 wfRestoreWarnings();
  61                 return (boolean) $data;
  62         }
  63
  64         /**
  65          * @param $image File
  66          * @return string
  67          */
  68         function getLongDesc( $image ) {
  69                 global $wgLang;
  70                 $original = parent::getLongDesc( $image );
  71
  72                 wfSuppressWarnings();
  73                 $metadata = unserialize($image->getMetadata());
  74                 wfRestoreWarnings();
  75
  76                 if( !$metadata || $metadata['frameCount'] <= 0 )
  77                         return $original;
  78
  79                 $info = array();
  80                 $info[] = $original;
  81
  82                 if ($metadata['loopCount'] == 0)
  83                         $info[] = wfMsgExt( 'file-info-png-looped', 'parseinline' );
  84                 elseif ($metadata['loopCount'] > 1)
  85                         $info[] = wfMsgExt( 'file-info-png-repeat', 'parseinline', $metadata['loopCount'] );
  86
  87                 if ($metadata['frameCount'] > 0)
  88                         $info[] = wfMsgExt( 'file-info-png-frames', 'parseinline', $metadata['frameCount'] );
  89
  90                 if ($metadata['duration'])
  91                         $info[] = $wgLang->formatTimePeriod( $metadata['duration'] );
  92
  93                 return $wgLang->commaList( $info );
  94         }
  95
  96 }