Jpeg.php

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<?php
class JpegHandler extends ExifBitmapHandler {

        function getMetadata ( $image, $filename ) {
                try {
                        $meta = BitmapMetadataHandler::Jpeg( $filename );
                        if ( !is_array( $meta ) ) {
                                // This should never happen, but doesn't hurt to be paranoid.
                                throw new MWException( 'Metadata array is not an array' );
                        }
                        $meta['MEDIAWIKI_EXIF_VERSION'] = Exif::version();
                        return serialize( $meta );
                }
                catch ( MWException $e ) {
                        // BitmapMetadataHandler throws an exception in certain exceptional cases like if file does not exist.
                        wfDebug( __METHOD__ . ': ' . $e->getMessage() . "\n" );

                        /* This used to use 0 (ExifBitmapHandler::OLD_BROKEN_FILE) for the cases
                         *      * No metadata in the file
                         *      * Something is broken in the file.
                         * However, if the metadata support gets expanded then you can't tell if the 0 is from
                         * a broken file, or just no props found. A broken file is likely to stay broken, but
                         * a file which had no props could have props once the metadata support is improved.
                         * Thus switch to using -1 to denote only a broken file, and use an array with only
                         * MEDIAWIKI_EXIF_VERSION to denote no props.
                         */
                        return ExifBitmapHandler::BROKEN_FILE;
                }
        }

        public function rotate( $file, $params ) {
                global $wgJpegTran;

                $rotation = ( $params[ 'rotation' ] + $this->getRotation( $file ) ) % 360;

                if( $wgJpegTran && is_file( $wgJpegTran ) ){
                        $cmd = wfEscapeShellArg( $wgJpegTran ) .
                                " -rotate " . wfEscapeShellArg( $rotation ) .
                                " -outfile " . wfEscapeShellArg( $params[ 'dstPath' ] ) .
                                " " . wfEscapeShellArg( $params[ 'srcPath' ] ) .  " 2>&1";
                                wfDebug( __METHOD__ . ": running jpgtran: $cmd\n" );
                                wfProfileIn( 'jpegtran' );
                                $retval = 0;
                                $err = wfShellExec( $cmd, $retval, $env );
                                wfProfileOut( 'jpegtran' );
                        if ( $retval !== 0 ) {
                                $this->logErrorForExternalProcess( $retval, $err, $cmd );
                                return new MediaTransformError( 'thumbnail_error', 0, 0, $err );
                        }
                        return false;
                } else {
                        return parent::rotate( $file, $params );
                }
        }

}