includes/media/Tiff.php

   1 <?php
   2 /**
   3  * Handler for Tiff images.
   4  *
   5  * @file
   6  * @ingroup Media
   7  */
   8
   9 /**
  10  * Handler for Tiff images.
  11  *
  12  * @ingroup Media
  13  */
  14 class TiffHandler extends ExifBitmapHandler {
  15
  16         /**
  17          * Conversion to PNG for inline display can be disabled here...
  18          * Note scaling should work with ImageMagick, but may not with GD scaling.
  19          *
  20          * Files pulled from an another MediaWiki instance via ForeignAPIRepo /
  21          * InstantCommons will have thumbnails managed from the remote instance,
  22          * so we can skip this check.
  23          *
  24          * @param $file
  25          *
  26          * @return bool
  27          */
  28         function canRender( $file ) {
  29                 global $wgTiffThumbnailType;
  30                 return (bool)$wgTiffThumbnailType
  31                         || ($file->getRepo() instanceof ForeignAPIRepo);
  32         }
  33
  34         /**
  35          * Browsers don't support TIFF inline generally...
  36          * For inline display, we need to convert to PNG.
  37          *
  38          * @param $file
  39          *
  40          * @return bool
  41          */
  42         function mustRender( $file ) {
  43                 return true;
  44         }
  45
  46         /**
  47          * @param $ext
  48          * @param $mime
  49          * @param $params
  50          * @return bool
  51          */
  52         function getThumbType( $ext, $mime, $params = null ) {
  53                 global $wgTiffThumbnailType;
  54                 return $wgTiffThumbnailType;
  55         }
  56
  57         /**
  58          * @param $image
  59          * @param $filename
  60          * @return string
  61          */
  62         function getMetadata( $image, $filename ) {
  63                 global $wgShowEXIF;
  64                 if ( $wgShowEXIF ) {
  65                         try {
  66                                 $meta = BitmapMetadataHandler::Tiff( $filename );
  67                                 if ( !is_array( $meta ) ) {
  68                                         // This should never happen, but doesn't hurt to be paranoid.
  69                                         throw new MWException('Metadata array is not an array');
  70                                 }
  71                                 $meta['MEDIAWIKI_EXIF_VERSION'] = Exif::version();
  72                                 return serialize( $meta );
  73                         }
  74                         catch ( MWException $e ) {
  75                                 // BitmapMetadataHandler throws an exception in certain exceptional
  76                                 // cases like if file does not exist.
  77                                 wfDebug( __METHOD__ . ': ' . $e->getMessage() . "\n" );
  78                                 return ExifBitmapHandler::BROKEN_FILE;
  79                         }
  80                 } else {
  81                         return '';
  82                 }
  83         }
  84 }