93c0954750
Allows media handlers to signal that thumbnail generation for this file is expensive and should be throttled more agressively. For now this is only done for large TIFF files. Bug: 65691 Change-Id: I01b34a1d46745649f179fdee435a8cfb19c5474e
106 lines
2.8 KiB
PHP
106 lines
2.8 KiB
PHP
<?php
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/**
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* Handler for Tiff images.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*
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* @file
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* @ingroup Media
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*/
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/**
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* Handler for Tiff images.
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*
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* @ingroup Media
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*/
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class TiffHandler extends ExifBitmapHandler {
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const EXPENSIVE_SIZE_LIMIT = 10485760; // TIFF files over 10M are considered expensive to thumbnail
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/**
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* Conversion to PNG for inline display can be disabled here...
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* Note scaling should work with ImageMagick, but may not with GD scaling.
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*
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* Files pulled from an another MediaWiki instance via ForeignAPIRepo /
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* InstantCommons will have thumbnails managed from the remote instance,
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* so we can skip this check.
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*
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* @param File $file
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* @return bool
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*/
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function canRender( $file ) {
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global $wgTiffThumbnailType;
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return (bool)$wgTiffThumbnailType
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|| $file->getRepo() instanceof ForeignAPIRepo;
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}
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/**
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* Browsers don't support TIFF inline generally...
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* For inline display, we need to convert to PNG.
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*
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* @param File $file
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* @return bool
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*/
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function mustRender( $file ) {
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return true;
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}
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/**
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* @param string $ext
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* @param string $mime
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* @param array $params
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* @return bool
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*/
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function getThumbType( $ext, $mime, $params = null ) {
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global $wgTiffThumbnailType;
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return $wgTiffThumbnailType;
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}
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/**
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* @param File $image
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* @param string $filename
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* @throws MWException
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* @return string
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*/
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function getMetadata( $image, $filename ) {
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global $wgShowEXIF;
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if ( $wgShowEXIF ) {
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try {
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$meta = BitmapMetadataHandler::Tiff( $filename );
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if ( !is_array( $meta ) ) {
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// This should never happen, but doesn't hurt to be paranoid.
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throw new MWException( 'Metadata array is not an array' );
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}
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$meta['MEDIAWIKI_EXIF_VERSION'] = Exif::version();
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return serialize( $meta );
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} catch ( MWException $e ) {
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// BitmapMetadataHandler throws an exception in certain exceptional
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// cases like if file does not exist.
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wfDebug( __METHOD__ . ': ' . $e->getMessage() . "\n" );
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return ExifBitmapHandler::BROKEN_FILE;
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}
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} else {
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return '';
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}
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}
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public function isExpensiveToThumbnail( $file ) {
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return $file->getSize() > static::EXPENSIVE_SIZE_LIMIT;
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}
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}
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