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<?php /** * Handler for JPEG images. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * http://www.gnu.org/copyleft/gpl.html * * @file * @ingroup Media */ use MediaWiki\MainConfigNames; use MediaWiki\MediaWikiServices; use MediaWiki\Shell\Shell; /** * JPEG specific handler. * Inherits most stuff from BitmapHandler, just here to do the metadata handler differently. * * Metadata stuff common to Jpeg and built-in Tiff (not PagedTiffHandler) is * in ExifBitmapHandler. * * @ingroup Media */ class JpegHandler extends ExifBitmapHandler { private const SRGB_EXIF_COLOR_SPACE = 'sRGB'; private const SRGB_ICC_PROFILE_DESCRIPTION = 'sRGB IEC61966-2.1'; public function normaliseParams( $image, &$params ) { if ( !parent::normaliseParams( $image, $params ) ) { return false; } if ( isset( $params['quality'] ) && !self::validateQuality( $params['quality'] ) ) { return false; } return true; } public function validateParam( $name, $value ) { if ( $name === 'quality' ) { return self::validateQuality( $value ); } return parent::validateParam( $name, $value ); } /** Validate and normalize quality value to be between 1 and 100 (inclusive). * @param string $value Quality value, will be converted to integer or 0 if invalid * @return bool True if the value is valid */ private static function validateQuality( $value ) { return $value === 'low'; } public function makeParamString( $params ) { // Prepend quality as "qValue-". This has to match parseParamString() below $res = parent::makeParamString( $params ); if ( $res && isset( $params['quality'] ) ) { $res = "q{$params['quality']}-$res"; } return $res; } public function parseParamString( $str ) { // $str contains "qlow-200px" or "200px" strings because thumb.php would strip the filename // first - check if the string begins with "qlow-", and if so, treat it as quality. // Pass the first portion, or the whole string if "qlow-" not found, to the parent // The parsing must match the makeParamString() above $res = false; $m = false; if ( preg_match( '/q([^-]+)-(.*)$/', $str, $m ) ) { $v = $m[1]; if ( self::validateQuality( $v ) ) { $res = parent::parseParamString( $m[2] ); if ( $res ) { $res['quality'] = $v; } } } else { $res = parent::parseParamString( $str ); } return $res; } protected function getScriptParams( $params ) { $res = parent::getScriptParams( $params ); if ( isset( $params['quality'] ) ) { $res['quality'] = $params['quality']; } return $res; } public function getSizeAndMetadata( $state, $filename ) { try { $meta = BitmapMetadataHandler::Jpeg( $filename ); if ( !is_array( $meta ) ) { // This should never happen, but doesn't hurt to be paranoid. throw new InvalidJpegException( 'Metadata array is not an array' ); } $meta['MEDIAWIKI_EXIF_VERSION'] = Exif::version(); $info = [ 'width' => $meta['SOF']['width'] ?? 0, 'height' => $meta['SOF']['height'] ?? 0, ]; if ( isset( $meta['SOF']['bits'] ) ) { $info['bits'] = $meta['SOF']['bits']; } $info = $this->applyExifRotation( $info, $meta ); unset( $meta['SOF'] ); $info['metadata'] = $meta; return $info; } catch ( InvalidJpegException $e ) { wfDebug( __METHOD__ . ': ' . $e->getMessage() ); // This used to return an integer-like string from getMetadata(), // producing a value which could not be unserialized in // img_metadata. The "_error" array key matches the legacy // unserialization for such image rows. return [ 'metadata' => [ '_error' => ExifBitmapHandler::BROKEN_FILE ] ]; } } /** * @param File $file * @param array $params Rotate parameters. * 'rotation' clockwise rotation in degrees, allowed are multiples of 90 * @since 1.21 * @return MediaTransformError|false */ public function rotate( $file, $params ) { $jpegTran = MediaWikiServices::getInstance()->getMainConfig()->get( MainConfigNames::JpegTran ); $rotation = ( $params['rotation'] + $this->getRotation( $file ) ) % 360; if ( $jpegTran && is_executable( $jpegTran ) ) { $command = Shell::command( $jpegTran, '-rotate', (string)$rotation, '-outfile', $params['dstPath'], $params['srcPath'] ); $result = $command ->includeStderr() ->execute(); if ( $result->getExitCode() !== 0 ) { $this->logErrorForExternalProcess( $result->getExitCode(), $result->getStdout(), $command ); return new MediaTransformError( 'thumbnail_error', 0, 0, $result->getStdout() ); } return false; } return parent::rotate( $file, $params ); } public function supportsBucketing() { return true; } public function sanitizeParamsForBucketing( $params ) { $params = parent::sanitizeParamsForBucketing( $params ); // Quality needs to be cleared for bucketing. Buckets need to be default quality unset( $params['quality'] ); return $params; } /** * @inheritDoc */ protected function transformImageMagick( $image, $params ) { $useTinyRGBForJPGThumbnails = MediaWikiServices::getInstance() ->getMainConfig()->get( MainConfigNames::UseTinyRGBForJPGThumbnails ); $ret = parent::transformImageMagick( $image, $params ); if ( $ret ) { return $ret; } if ( $useTinyRGBForJPGThumbnails ) { // T100976 If the profile embedded in the JPG is sRGB, swap it for the smaller // (and free) TinyRGB /** * We'll want to replace the color profile for JPGs: * * in the sRGB color space, or with the sRGB profile * (other profiles will be left untouched) * * without color space or profile, in which case browsers * should assume sRGB, but don't always do (e.g. on wide-gamut * monitors (unless it's meant for low bandwidth) * @see https://phabricator.wikimedia.org/T134498 */ $colorSpaces = [ self::SRGB_EXIF_COLOR_SPACE, '-' ]; $profiles = [ self::SRGB_ICC_PROFILE_DESCRIPTION ]; // we'll also add TinyRGB profile to images lacking a profile, but // only if they're not low quality (which are meant to save bandwidth // and we don't want to increase the filesize by adding a profile) if ( isset( $params['quality'] ) && $params['quality'] > 30 ) { $profiles[] = '-'; } $this->swapICCProfile( $params['dstPath'], $colorSpaces, $profiles, realpath( __DIR__ ) . '/tinyrgb.icc' ); } return false; } /** * Swaps an embedded ICC profile for another, if found. * Depends on exiftool, no-op if not installed. * @param string $filepath File to be manipulated (will be overwritten) * @param array $colorSpaces Only process files with this/these Color Space(s) * @param array $oldProfileStrings Exact name(s) of color profile to look for * (the one that will be replaced) * @param string $profileFilepath ICC profile file to apply to the file * @since 1.26 * @return bool */ public function swapICCProfile( $filepath, array $colorSpaces, array $oldProfileStrings, $profileFilepath ) { $exiftool = MediaWikiServices::getInstance()->getMainConfig()->get( MainConfigNames::Exiftool ); if ( !$exiftool || !is_executable( $exiftool ) ) { return false; } $result = Shell::command( $exiftool, '-EXIF:ColorSpace', '-ICC_Profile:ProfileDescription', '-S', '-T', $filepath ) ->includeStderr() ->execute(); // Explode EXIF data into an array with [0 => Color Space, 1 => Device Model Desc] $data = explode( "\t", trim( $result->getStdout() ), 3 ); if ( $result->getExitCode() !== 0 ) { return false; } // Make a regex out of the source data to match it to an array of color // spaces in a case-insensitive way $colorSpaceRegex = '/' . preg_quote( $data[0], '/' ) . '/i'; if ( !preg_grep( $colorSpaceRegex, $colorSpaces ) ) { // We can't establish that this file matches the color space, don't process it return false; } $profileRegex = '/' . preg_quote( $data[1], '/' ) . '/i'; if ( !preg_grep( $profileRegex, $oldProfileStrings ) ) { // We can't establish that this file has the expected ICC profile, don't process it return false; } $command = Shell::command( $exiftool, '-overwrite_original', '-icc_profile<=' . $profileFilepath, $filepath ); $result = $command ->includeStderr() ->execute(); if ( $result->getExitCode() !== 0 ) { $this->logErrorForExternalProcess( $result->getExitCode(), $result->getStdout(), $command ); return false; } return true; } }
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