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| 1 | <?php |
| 2 | /** |
| 3 | * Handler for Tiff images. |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License along |
| 16 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 18 | * http://www.gnu.org/copyleft/gpl.html |
| 19 | * |
| 20 | * @file |
| 21 | * @ingroup Media |
| 22 | */ |
| 23 | |
| 24 | use MediaWiki\MainConfigNames; |
| 25 | use MediaWiki\MediaWikiServices; |
| 26 | |
| 27 | /** |
| 28 | * Handler for Tiff images. |
| 29 | * |
| 30 | * @ingroup Media |
| 31 | */ |
| 32 | class TiffHandler extends ExifBitmapHandler { |
| 33 | /** |
| 34 | * TIFF files over 10M are considered expensive to thumbnail |
| 35 | */ |
| 36 | private const EXPENSIVE_SIZE_LIMIT = 10_485_760; |
| 37 | |
| 38 | /** |
| 39 | * Conversion to PNG for inline display can be disabled here... |
| 40 | * Note scaling should work with ImageMagick, but may not with GD scaling. |
| 41 | * |
| 42 | * Files pulled from an another MediaWiki instance via ForeignAPIRepo / |
| 43 | * InstantCommons will have thumbnails managed from the remote instance, |
| 44 | * so we can skip this check. |
| 45 | * |
| 46 | * @param File $file |
| 47 | * @return bool |
| 48 | */ |
| 49 | public function canRender( $file ) { |
| 50 | $tiffThumbnailType = MediaWikiServices::getInstance()->getMainConfig() |
| 51 | ->get( MainConfigNames::TiffThumbnailType ); |
| 52 | |
| 53 | return (bool)$tiffThumbnailType |
| 54 | || $file->getRepo() instanceof ForeignAPIRepo; |
| 55 | } |
| 56 | |
| 57 | /** |
| 58 | * Browsers don't support TIFF inline generally... |
| 59 | * For inline display, we need to convert to PNG. |
| 60 | * |
| 61 | * @param File $file |
| 62 | * @return bool |
| 63 | */ |
| 64 | public function mustRender( $file ) { |
| 65 | return true; |
| 66 | } |
| 67 | |
| 68 | /** |
| 69 | * @param string $ext |
| 70 | * @param string $mime |
| 71 | * @param array|null $params |
| 72 | * @return array |
| 73 | */ |
| 74 | public function getThumbType( $ext, $mime, $params = null ) { |
| 75 | $tiffThumbnailType = MediaWikiServices::getInstance()->getMainConfig() |
| 76 | ->get( MainConfigNames::TiffThumbnailType ); |
| 77 | |
| 78 | return $tiffThumbnailType; |
| 79 | } |
| 80 | |
| 81 | public function getSizeAndMetadata( $state, $filename ) { |
| 82 | $showEXIF = MediaWikiServices::getInstance()->getMainConfig()->get( MainConfigNames::ShowEXIF ); |
| 83 | |
| 84 | try { |
| 85 | $meta = BitmapMetadataHandler::Tiff( $filename ); |
| 86 | if ( !is_array( $meta ) ) { |
| 87 | // This should never happen, but doesn't hurt to be paranoid. |
| 88 | throw new InvalidTiffException( 'Metadata array is not an array' ); |
| 89 | } |
| 90 | $info = [ |
| 91 | 'width' => $meta['ImageWidth'] ?? 0, |
| 92 | 'height' => $meta['ImageLength'] ?? 0, |
| 93 | ]; |
| 94 | $info = $this->applyExifRotation( $info, $meta ); |
| 95 | if ( $showEXIF ) { |
| 96 | $meta['MEDIAWIKI_EXIF_VERSION'] = Exif::version(); |
| 97 | $info['metadata'] = $meta; |
| 98 | } |
| 99 | return $info; |
| 100 | } catch ( InvalidTiffException $e ) { |
| 101 | // BitmapMetadataHandler throws an exception in certain exceptional |
| 102 | // cases like if file does not exist. |
| 103 | wfDebug( __METHOD__ . ': ' . $e->getMessage() ); |
| 104 | |
| 105 | return [ 'metadata' => [ '_error' => ExifBitmapHandler::BROKEN_FILE ] ]; |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | public function isExpensiveToThumbnail( $file ) { |
| 110 | return $file->getSize() > static::EXPENSIVE_SIZE_LIMIT; |
| 111 | } |
| 112 | } |