mirror of
https://github.com/YunoHost-Apps/mediawiki_ynh.git
synced 2024-09-03 19:46:05 +02:00
790 lines
26 KiB
PHP
790 lines
26 KiB
PHP
<?php
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/**
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* Generic handler for bitmap 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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* Generic handler for bitmap images
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*
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* @ingroup Media
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*/
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class BitmapHandler extends ImageHandler {
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/**
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* @param $image File
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* @param array $params Transform parameters. Entries with the keys 'width'
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* and 'height' are the respective screen width and height, while the keys
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* 'physicalWidth' and 'physicalHeight' indicate the thumbnail dimensions.
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* @return bool
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*/
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function normaliseParams( $image, &$params ) {
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if ( !parent::normaliseParams( $image, $params ) ) {
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return false;
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}
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# Obtain the source, pre-rotation dimensions
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$srcWidth = $image->getWidth( $params['page'] );
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$srcHeight = $image->getHeight( $params['page'] );
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# Don't make an image bigger than the source
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if ( $params['physicalWidth'] >= $srcWidth ) {
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$params['physicalWidth'] = $srcWidth;
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$params['physicalHeight'] = $srcHeight;
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# Skip scaling limit checks if no scaling is required
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# due to requested size being bigger than source.
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if ( !$image->mustRender() ) {
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return true;
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}
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}
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# Check if the file is smaller than the maximum image area for thumbnailing
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$checkImageAreaHookResult = null;
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wfRunHooks( 'BitmapHandlerCheckImageArea', array( $image, &$params, &$checkImageAreaHookResult ) );
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if ( is_null( $checkImageAreaHookResult ) ) {
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global $wgMaxImageArea;
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if ( $srcWidth * $srcHeight > $wgMaxImageArea &&
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!( $image->getMimeType() == 'image/jpeg' &&
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self::getScalerType( false, false ) == 'im' ) ) {
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# Only ImageMagick can efficiently downsize jpg images without loading
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# the entire file in memory
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return false;
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}
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} else {
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return $checkImageAreaHookResult;
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}
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return true;
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}
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/**
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* Extracts the width/height if the image will be scaled before rotating
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*
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* This will match the physical size/aspect ratio of the original image
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* prior to application of the rotation -- so for a portrait image that's
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* stored as raw landscape with 90-degress rotation, the resulting size
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* will be wider than it is tall.
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*
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* @param array $params Parameters as returned by normaliseParams
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* @param int $rotation The rotation angle that will be applied
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* @return array ($width, $height) array
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*/
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public function extractPreRotationDimensions( $params, $rotation ) {
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if ( $rotation == 90 || $rotation == 270 ) {
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# We'll resize before rotation, so swap the dimensions again
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$width = $params['physicalHeight'];
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$height = $params['physicalWidth'];
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} else {
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$width = $params['physicalWidth'];
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$height = $params['physicalHeight'];
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}
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return array( $width, $height );
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}
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/**
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* @param $image File
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* @param $dstPath
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* @param $dstUrl
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* @param $params
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* @param int $flags
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* @return MediaTransformError|ThumbnailImage|TransformParameterError
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*/
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function doTransform( $image, $dstPath, $dstUrl, $params, $flags = 0 ) {
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if ( !$this->normaliseParams( $image, $params ) ) {
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return new TransformParameterError( $params );
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}
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# Create a parameter array to pass to the scaler
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$scalerParams = array(
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# The size to which the image will be resized
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'physicalWidth' => $params['physicalWidth'],
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'physicalHeight' => $params['physicalHeight'],
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'physicalDimensions' => "{$params['physicalWidth']}x{$params['physicalHeight']}",
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# The size of the image on the page
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'clientWidth' => $params['width'],
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'clientHeight' => $params['height'],
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# Comment as will be added to the Exif of the thumbnail
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'comment' => isset( $params['descriptionUrl'] ) ?
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"File source: {$params['descriptionUrl']}" : '',
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# Properties of the original image
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'srcWidth' => $image->getWidth(),
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'srcHeight' => $image->getHeight(),
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'mimeType' => $image->getMimeType(),
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'dstPath' => $dstPath,
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'dstUrl' => $dstUrl,
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);
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# Determine scaler type
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$scaler = self::getScalerType( $dstPath );
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wfDebug( __METHOD__ . ": creating {$scalerParams['physicalDimensions']} thumbnail at $dstPath using scaler $scaler\n" );
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if ( !$image->mustRender() &&
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$scalerParams['physicalWidth'] == $scalerParams['srcWidth']
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&& $scalerParams['physicalHeight'] == $scalerParams['srcHeight'] ) {
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# normaliseParams (or the user) wants us to return the unscaled image
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wfDebug( __METHOD__ . ": returning unscaled image\n" );
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return $this->getClientScalingThumbnailImage( $image, $scalerParams );
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}
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if ( $scaler == 'client' ) {
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# Client-side image scaling, use the source URL
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# Using the destination URL in a TRANSFORM_LATER request would be incorrect
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return $this->getClientScalingThumbnailImage( $image, $scalerParams );
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}
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if ( $flags & self::TRANSFORM_LATER ) {
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wfDebug( __METHOD__ . ": Transforming later per flags.\n" );
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$params = array(
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'width' => $scalerParams['clientWidth'],
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'height' => $scalerParams['clientHeight']
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);
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return new ThumbnailImage( $image, $dstUrl, false, $params );
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}
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# Try to make a target path for the thumbnail
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if ( !wfMkdirParents( dirname( $dstPath ), null, __METHOD__ ) ) {
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wfDebug( __METHOD__ . ": Unable to create thumbnail destination directory, falling back to client scaling\n" );
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return $this->getClientScalingThumbnailImage( $image, $scalerParams );
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}
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# Transform functions and binaries need a FS source file
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$scalerParams['srcPath'] = $image->getLocalRefPath();
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# Try a hook
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$mto = null;
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wfRunHooks( 'BitmapHandlerTransform', array( $this, $image, &$scalerParams, &$mto ) );
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if ( !is_null( $mto ) ) {
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wfDebug( __METHOD__ . ": Hook to BitmapHandlerTransform created an mto\n" );
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$scaler = 'hookaborted';
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}
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switch ( $scaler ) {
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case 'hookaborted':
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# Handled by the hook above
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$err = $mto->isError() ? $mto : false;
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break;
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case 'im':
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$err = $this->transformImageMagick( $image, $scalerParams );
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break;
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case 'custom':
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$err = $this->transformCustom( $image, $scalerParams );
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break;
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case 'imext':
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$err = $this->transformImageMagickExt( $image, $scalerParams );
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break;
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case 'gd':
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default:
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$err = $this->transformGd( $image, $scalerParams );
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break;
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}
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# Remove the file if a zero-byte thumbnail was created, or if there was an error
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$removed = $this->removeBadFile( $dstPath, (bool)$err );
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if ( $err ) {
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# transform returned MediaTransforError
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return $err;
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} elseif ( $removed ) {
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# Thumbnail was zero-byte and had to be removed
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return new MediaTransformError( 'thumbnail_error',
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$scalerParams['clientWidth'], $scalerParams['clientHeight'] );
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} elseif ( $mto ) {
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return $mto;
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} else {
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$params = array(
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'width' => $scalerParams['clientWidth'],
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'height' => $scalerParams['clientHeight']
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);
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return new ThumbnailImage( $image, $dstUrl, $dstPath, $params );
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}
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}
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/**
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* Returns which scaler type should be used. Creates parent directories
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* for $dstPath and returns 'client' on error
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*
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* @return string client,im,custom,gd
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*/
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protected static function getScalerType( $dstPath, $checkDstPath = true ) {
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global $wgUseImageResize, $wgUseImageMagick, $wgCustomConvertCommand;
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if ( !$dstPath && $checkDstPath ) {
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# No output path available, client side scaling only
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$scaler = 'client';
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} elseif ( !$wgUseImageResize ) {
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$scaler = 'client';
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} elseif ( $wgUseImageMagick ) {
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$scaler = 'im';
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} elseif ( $wgCustomConvertCommand ) {
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$scaler = 'custom';
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} elseif ( function_exists( 'imagecreatetruecolor' ) ) {
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$scaler = 'gd';
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} elseif ( class_exists( 'Imagick' ) ) {
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$scaler = 'imext';
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} else {
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$scaler = 'client';
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}
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return $scaler;
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}
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/**
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* Get a ThumbnailImage that respresents an image that will be scaled
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* client side
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*
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* @param $image File File associated with this thumbnail
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* @param array $scalerParams Array with scaler params
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* @return ThumbnailImage
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*
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* @todo fixme: no rotation support
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*/
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protected function getClientScalingThumbnailImage( $image, $scalerParams ) {
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$params = array(
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'width' => $scalerParams['clientWidth'],
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'height' => $scalerParams['clientHeight']
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);
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return new ThumbnailImage( $image, $image->getURL(), null, $params );
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}
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/**
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* Transform an image using ImageMagick
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*
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* @param $image File File associated with this thumbnail
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* @param array $params Array with scaler params
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*
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* @return MediaTransformError Error object if error occurred, false (=no error) otherwise
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*/
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protected function transformImageMagick( $image, $params ) {
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# use ImageMagick
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global $wgSharpenReductionThreshold, $wgSharpenParameter,
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$wgMaxAnimatedGifArea,
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$wgImageMagickTempDir, $wgImageMagickConvertCommand;
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$quality = array();
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$sharpen = array();
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$scene = false;
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$animation_pre = array();
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$animation_post = array();
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$decoderHint = array();
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if ( $params['mimeType'] == 'image/jpeg' ) {
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$quality = array( '-quality', '80' ); // 80%
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# Sharpening, see bug 6193
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if ( ( $params['physicalWidth'] + $params['physicalHeight'] )
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/ ( $params['srcWidth'] + $params['srcHeight'] )
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< $wgSharpenReductionThreshold ) {
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$sharpen = array( '-sharpen', $wgSharpenParameter );
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}
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if ( version_compare( $this->getMagickVersion(), "6.5.6" ) >= 0 ) {
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// JPEG decoder hint to reduce memory, available since IM 6.5.6-2
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$decoderHint = array( '-define', "jpeg:size={$params['physicalDimensions']}" );
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}
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} elseif ( $params['mimeType'] == 'image/png' ) {
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$quality = array( '-quality', '95' ); // zlib 9, adaptive filtering
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} elseif ( $params['mimeType'] == 'image/gif' ) {
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if ( $this->getImageArea( $image ) > $wgMaxAnimatedGifArea ) {
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// Extract initial frame only; we're so big it'll
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// be a total drag. :P
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$scene = 0;
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} elseif ( $this->isAnimatedImage( $image ) ) {
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// Coalesce is needed to scale animated GIFs properly (bug 1017).
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$animation_pre = array( '-coalesce' );
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// We optimize the output, but -optimize is broken,
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// use optimizeTransparency instead (bug 11822)
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if ( version_compare( $this->getMagickVersion(), "6.3.5" ) >= 0 ) {
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$animation_post = array( '-fuzz', '5%', '-layers', 'optimizeTransparency' );
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}
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}
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} elseif ( $params['mimeType'] == 'image/x-xcf' ) {
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$animation_post = array( '-layers', 'merge' );
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}
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// Use one thread only, to avoid deadlock bugs on OOM
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$env = array( 'OMP_NUM_THREADS' => 1 );
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if ( strval( $wgImageMagickTempDir ) !== '' ) {
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$env['MAGICK_TMPDIR'] = $wgImageMagickTempDir;
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}
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$rotation = $this->getRotation( $image );
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list( $width, $height ) = $this->extractPreRotationDimensions( $params, $rotation );
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$cmd = call_user_func_array( 'wfEscapeShellArg', array_merge(
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array( $wgImageMagickConvertCommand ),
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$quality,
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// Specify white background color, will be used for transparent images
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// in Internet Explorer/Windows instead of default black.
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array( '-background', 'white' ),
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$decoderHint,
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array( $this->escapeMagickInput( $params['srcPath'], $scene ) ),
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$animation_pre,
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// For the -thumbnail option a "!" is needed to force exact size,
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// or ImageMagick may decide your ratio is wrong and slice off
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// a pixel.
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array( '-thumbnail', "{$width}x{$height}!" ),
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// Add the source url as a comment to the thumb, but don't add the flag if there's no comment
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( $params['comment'] !== ''
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? array( '-set', 'comment', $this->escapeMagickProperty( $params['comment'] ) )
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: array() ),
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array( '-depth', 8 ),
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$sharpen,
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array( '-rotate', "-$rotation" ),
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$animation_post,
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array( $this->escapeMagickOutput( $params['dstPath'] ) ) ) );
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wfDebug( __METHOD__ . ": running ImageMagick: $cmd\n" );
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wfProfileIn( 'convert' );
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$retval = 0;
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$err = wfShellExecWithStderr( $cmd, $retval, $env );
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wfProfileOut( 'convert' );
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if ( $retval !== 0 ) {
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$this->logErrorForExternalProcess( $retval, $err, $cmd );
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return $this->getMediaTransformError( $params, $err );
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}
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return false; # No error
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}
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/**
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* Transform an image using the Imagick PHP extension
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*
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* @param $image File File associated with this thumbnail
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* @param array $params Array with scaler params
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*
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* @return MediaTransformError Error object if error occurred, false (=no error) otherwise
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*/
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protected function transformImageMagickExt( $image, $params ) {
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global $wgSharpenReductionThreshold, $wgSharpenParameter, $wgMaxAnimatedGifArea;
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try {
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$im = new Imagick();
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$im->readImage( $params['srcPath'] );
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if ( $params['mimeType'] == 'image/jpeg' ) {
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// Sharpening, see bug 6193
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if ( ( $params['physicalWidth'] + $params['physicalHeight'] )
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/ ( $params['srcWidth'] + $params['srcHeight'] )
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< $wgSharpenReductionThreshold ) {
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// Hack, since $wgSharpenParamater is written specifically for the command line convert
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list( $radius, $sigma ) = explode( 'x', $wgSharpenParameter );
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$im->sharpenImage( $radius, $sigma );
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}
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$im->setCompressionQuality( 80 );
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} elseif ( $params['mimeType'] == 'image/png' ) {
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$im->setCompressionQuality( 95 );
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} elseif ( $params['mimeType'] == 'image/gif' ) {
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if ( $this->getImageArea( $image ) > $wgMaxAnimatedGifArea ) {
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// Extract initial frame only; we're so big it'll
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// be a total drag. :P
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$im->setImageScene( 0 );
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} elseif ( $this->isAnimatedImage( $image ) ) {
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// Coalesce is needed to scale animated GIFs properly (bug 1017).
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$im = $im->coalesceImages();
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}
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}
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$rotation = $this->getRotation( $image );
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list( $width, $height ) = $this->extractPreRotationDimensions( $params, $rotation );
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$im->setImageBackgroundColor( new ImagickPixel( 'white' ) );
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// Call Imagick::thumbnailImage on each frame
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foreach ( $im as $i => $frame ) {
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if ( !$frame->thumbnailImage( $width, $height, /* fit */ false ) ) {
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return $this->getMediaTransformError( $params, "Error scaling frame $i" );
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}
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}
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$im->setImageDepth( 8 );
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if ( $rotation ) {
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if ( !$im->rotateImage( new ImagickPixel( 'white' ), 360 - $rotation ) ) {
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return $this->getMediaTransformError( $params, "Error rotating $rotation degrees" );
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}
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}
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if ( $this->isAnimatedImage( $image ) ) {
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wfDebug( __METHOD__ . ": Writing animated thumbnail\n" );
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// This is broken somehow... can't find out how to fix it
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$result = $im->writeImages( $params['dstPath'], true );
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} else {
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$result = $im->writeImage( $params['dstPath'] );
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}
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if ( !$result ) {
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return $this->getMediaTransformError( $params,
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"Unable to write thumbnail to {$params['dstPath']}" );
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}
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} catch ( ImagickException $e ) {
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return $this->getMediaTransformError( $params, $e->getMessage() );
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}
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return false;
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}
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/**
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* Transform an image using a custom command
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*
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* @param $image File File associated with this thumbnail
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* @param array $params Array with scaler params
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*
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* @return MediaTransformError Error object if error occurred, false (=no error) otherwise
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*/
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protected function transformCustom( $image, $params ) {
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# Use a custom convert command
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global $wgCustomConvertCommand;
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# Variables: %s %d %w %h
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$src = wfEscapeShellArg( $params['srcPath'] );
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$dst = wfEscapeShellArg( $params['dstPath'] );
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$cmd = $wgCustomConvertCommand;
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$cmd = str_replace( '%s', $src, str_replace( '%d', $dst, $cmd ) ); # Filenames
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$cmd = str_replace( '%h', wfEscapeShellArg( $params['physicalHeight'] ),
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str_replace( '%w', wfEscapeShellArg( $params['physicalWidth'] ), $cmd ) ); # Size
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wfDebug( __METHOD__ . ": Running custom convert command $cmd\n" );
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wfProfileIn( 'convert' );
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$retval = 0;
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$err = wfShellExecWithStderr( $cmd, $retval );
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wfProfileOut( 'convert' );
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if ( $retval !== 0 ) {
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$this->logErrorForExternalProcess( $retval, $err, $cmd );
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return $this->getMediaTransformError( $params, $err );
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}
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return false; # No error
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}
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/**
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* Log an error that occurred in an external process
|
|
*
|
|
* @param $retval int
|
|
* @param $err int
|
|
* @param $cmd string
|
|
*/
|
|
protected function logErrorForExternalProcess( $retval, $err, $cmd ) {
|
|
wfDebugLog( 'thumbnail',
|
|
sprintf( 'thumbnail failed on %s: error %d "%s" from "%s"',
|
|
wfHostname(), $retval, trim( $err ), $cmd ) );
|
|
}
|
|
/**
|
|
* Get a MediaTransformError with error 'thumbnail_error'
|
|
*
|
|
* @param array $params Parameter array as passed to the transform* functions
|
|
* @param string $errMsg Error message
|
|
* @return MediaTransformError
|
|
*/
|
|
public function getMediaTransformError( $params, $errMsg ) {
|
|
return new MediaTransformError( 'thumbnail_error', $params['clientWidth'],
|
|
$params['clientHeight'], $errMsg );
|
|
}
|
|
|
|
/**
|
|
* Transform an image using the built in GD library
|
|
*
|
|
* @param $image File File associated with this thumbnail
|
|
* @param array $params Array with scaler params
|
|
*
|
|
* @return MediaTransformError Error object if error occurred, false (=no error) otherwise
|
|
*/
|
|
protected function transformGd( $image, $params ) {
|
|
# Use PHP's builtin GD library functions.
|
|
#
|
|
# First find out what kind of file this is, and select the correct
|
|
# input routine for this.
|
|
|
|
$typemap = array(
|
|
'image/gif' => array( 'imagecreatefromgif', 'palette', 'imagegif' ),
|
|
'image/jpeg' => array( 'imagecreatefromjpeg', 'truecolor', array( __CLASS__, 'imageJpegWrapper' ) ),
|
|
'image/png' => array( 'imagecreatefrompng', 'bits', 'imagepng' ),
|
|
'image/vnd.wap.wbmp' => array( 'imagecreatefromwbmp', 'palette', 'imagewbmp' ),
|
|
'image/xbm' => array( 'imagecreatefromxbm', 'palette', 'imagexbm' ),
|
|
);
|
|
if ( !isset( $typemap[$params['mimeType']] ) ) {
|
|
$err = 'Image type not supported';
|
|
wfDebug( "$err\n" );
|
|
$errMsg = wfMessage( 'thumbnail_image-type' )->text();
|
|
return $this->getMediaTransformError( $params, $errMsg );
|
|
}
|
|
list( $loader, $colorStyle, $saveType ) = $typemap[$params['mimeType']];
|
|
|
|
if ( !function_exists( $loader ) ) {
|
|
$err = "Incomplete GD library configuration: missing function $loader";
|
|
wfDebug( "$err\n" );
|
|
$errMsg = wfMessage( 'thumbnail_gd-library', $loader )->text();
|
|
return $this->getMediaTransformError( $params, $errMsg );
|
|
}
|
|
|
|
if ( !file_exists( $params['srcPath'] ) ) {
|
|
$err = "File seems to be missing: {$params['srcPath']}";
|
|
wfDebug( "$err\n" );
|
|
$errMsg = wfMessage( 'thumbnail_image-missing', $params['srcPath'] )->text();
|
|
return $this->getMediaTransformError( $params, $errMsg );
|
|
}
|
|
|
|
$src_image = call_user_func( $loader, $params['srcPath'] );
|
|
|
|
$rotation = function_exists( 'imagerotate' ) ? $this->getRotation( $image ) : 0;
|
|
list( $width, $height ) = $this->extractPreRotationDimensions( $params, $rotation );
|
|
$dst_image = imagecreatetruecolor( $width, $height );
|
|
|
|
// Initialise the destination image to transparent instead of
|
|
// the default solid black, to support PNG and GIF transparency nicely
|
|
$background = imagecolorallocate( $dst_image, 0, 0, 0 );
|
|
imagecolortransparent( $dst_image, $background );
|
|
imagealphablending( $dst_image, false );
|
|
|
|
if ( $colorStyle == 'palette' ) {
|
|
// Don't resample for paletted GIF images.
|
|
// It may just uglify them, and completely breaks transparency.
|
|
imagecopyresized( $dst_image, $src_image,
|
|
0, 0, 0, 0,
|
|
$width, $height,
|
|
imagesx( $src_image ), imagesy( $src_image ) );
|
|
} else {
|
|
imagecopyresampled( $dst_image, $src_image,
|
|
0, 0, 0, 0,
|
|
$width, $height,
|
|
imagesx( $src_image ), imagesy( $src_image ) );
|
|
}
|
|
|
|
if ( $rotation % 360 != 0 && $rotation % 90 == 0 ) {
|
|
$rot_image = imagerotate( $dst_image, $rotation, 0 );
|
|
imagedestroy( $dst_image );
|
|
$dst_image = $rot_image;
|
|
}
|
|
|
|
imagesavealpha( $dst_image, true );
|
|
|
|
call_user_func( $saveType, $dst_image, $params['dstPath'] );
|
|
imagedestroy( $dst_image );
|
|
imagedestroy( $src_image );
|
|
|
|
return false; # No error
|
|
}
|
|
|
|
/**
|
|
* Escape a string for ImageMagick's property input (e.g. -set -comment)
|
|
* See InterpretImageProperties() in magick/property.c
|
|
* @return mixed|string
|
|
*/
|
|
function escapeMagickProperty( $s ) {
|
|
// Double the backslashes
|
|
$s = str_replace( '\\', '\\\\', $s );
|
|
// Double the percents
|
|
$s = str_replace( '%', '%%', $s );
|
|
// Escape initial - or @
|
|
if ( strlen( $s ) > 0 && ( $s[0] === '-' || $s[0] === '@' ) ) {
|
|
$s = '\\' . $s;
|
|
}
|
|
return $s;
|
|
}
|
|
|
|
/**
|
|
* Escape a string for ImageMagick's input filenames. See ExpandFilenames()
|
|
* and GetPathComponent() in magick/utility.c.
|
|
*
|
|
* This won't work with an initial ~ or @, so input files should be prefixed
|
|
* with the directory name.
|
|
*
|
|
* Glob character unescaping is broken in ImageMagick before 6.6.1-5, but
|
|
* it's broken in a way that doesn't involve trying to convert every file
|
|
* in a directory, so we're better off escaping and waiting for the bugfix
|
|
* to filter down to users.
|
|
*
|
|
* @param string $path The file path
|
|
* @param bool|string $scene The scene specification, or false if there is none
|
|
* @throws MWException
|
|
* @return string
|
|
*/
|
|
function escapeMagickInput( $path, $scene = false ) {
|
|
# Die on initial metacharacters (caller should prepend path)
|
|
$firstChar = substr( $path, 0, 1 );
|
|
if ( $firstChar === '~' || $firstChar === '@' ) {
|
|
throw new MWException( __METHOD__ . ': cannot escape this path name' );
|
|
}
|
|
|
|
# Escape glob chars
|
|
$path = preg_replace( '/[*?\[\]{}]/', '\\\\\0', $path );
|
|
|
|
return $this->escapeMagickPath( $path, $scene );
|
|
}
|
|
|
|
/**
|
|
* Escape a string for ImageMagick's output filename. See
|
|
* InterpretImageFilename() in magick/image.c.
|
|
* @return string
|
|
*/
|
|
function escapeMagickOutput( $path, $scene = false ) {
|
|
$path = str_replace( '%', '%%', $path );
|
|
return $this->escapeMagickPath( $path, $scene );
|
|
}
|
|
|
|
/**
|
|
* Armour a string against ImageMagick's GetPathComponent(). This is a
|
|
* helper function for escapeMagickInput() and escapeMagickOutput().
|
|
*
|
|
* @param string $path The file path
|
|
* @param bool|string $scene The scene specification, or false if there is none
|
|
* @throws MWException
|
|
* @return string
|
|
*/
|
|
protected function escapeMagickPath( $path, $scene = false ) {
|
|
# Die on format specifiers (other than drive letters). The regex is
|
|
# meant to match all the formats you get from "convert -list format"
|
|
if ( preg_match( '/^([a-zA-Z0-9-]+):/', $path, $m ) ) {
|
|
if ( wfIsWindows() && is_dir( $m[0] ) ) {
|
|
// OK, it's a drive letter
|
|
// ImageMagick has a similar exception, see IsMagickConflict()
|
|
} else {
|
|
throw new MWException( __METHOD__ . ': unexpected colon character in path name' );
|
|
}
|
|
}
|
|
|
|
# If there are square brackets, add a do-nothing scene specification
|
|
# to force a literal interpretation
|
|
if ( $scene === false ) {
|
|
if ( strpos( $path, '[' ) !== false ) {
|
|
$path .= '[0--1]';
|
|
}
|
|
} else {
|
|
$path .= "[$scene]";
|
|
}
|
|
return $path;
|
|
}
|
|
|
|
/**
|
|
* Retrieve the version of the installed ImageMagick
|
|
* You can use PHPs version_compare() to use this value
|
|
* Value is cached for one hour.
|
|
* @return String representing the IM version.
|
|
*/
|
|
protected function getMagickVersion() {
|
|
global $wgMemc;
|
|
|
|
$cache = $wgMemc->get( "imagemagick-version" );
|
|
if ( !$cache ) {
|
|
global $wgImageMagickConvertCommand;
|
|
$cmd = wfEscapeShellArg( $wgImageMagickConvertCommand ) . ' -version';
|
|
wfDebug( __METHOD__ . ": Running convert -version\n" );
|
|
$retval = '';
|
|
$return = wfShellExec( $cmd, $retval );
|
|
$x = preg_match( '/Version: ImageMagick ([0-9]*\.[0-9]*\.[0-9]*)/', $return, $matches );
|
|
if ( $x != 1 ) {
|
|
wfDebug( __METHOD__ . ": ImageMagick version check failed\n" );
|
|
return null;
|
|
}
|
|
$wgMemc->set( "imagemagick-version", $matches[1], 3600 );
|
|
return $matches[1];
|
|
}
|
|
return $cache;
|
|
}
|
|
|
|
static function imageJpegWrapper( $dst_image, $thumbPath ) {
|
|
imageinterlace( $dst_image );
|
|
imagejpeg( $dst_image, $thumbPath, 95 );
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns whether the current scaler supports rotation (im and gd do)
|
|
*
|
|
* @return bool
|
|
*/
|
|
public static function canRotate() {
|
|
$scaler = self::getScalerType( null, false );
|
|
switch ( $scaler ) {
|
|
case 'im':
|
|
# ImageMagick supports autorotation
|
|
return true;
|
|
case 'imext':
|
|
# Imagick::rotateImage
|
|
return true;
|
|
case 'gd':
|
|
# GD's imagerotate function is used to rotate images, but not
|
|
# all precompiled PHP versions have that function
|
|
return function_exists( 'imagerotate' );
|
|
default:
|
|
# Other scalers don't support rotation
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param $file File
|
|
* @param array $params Rotate parameters.
|
|
* 'rotation' clockwise rotation in degrees, allowed are multiples of 90
|
|
* @since 1.21
|
|
* @return bool
|
|
*/
|
|
public function rotate( $file, $params ) {
|
|
global $wgImageMagickConvertCommand;
|
|
|
|
$rotation = ( $params['rotation'] + $this->getRotation( $file ) ) % 360;
|
|
$scene = false;
|
|
|
|
$scaler = self::getScalerType( null, false );
|
|
switch ( $scaler ) {
|
|
case 'im':
|
|
$cmd = wfEscapeShellArg( $wgImageMagickConvertCommand ) . " " .
|
|
wfEscapeShellArg( $this->escapeMagickInput( $params['srcPath'], $scene ) ) .
|
|
" -rotate " . wfEscapeShellArg( "-$rotation" ) . " " .
|
|
wfEscapeShellArg( $this->escapeMagickOutput( $params['dstPath'] ) );
|
|
wfDebug( __METHOD__ . ": running ImageMagick: $cmd\n" );
|
|
wfProfileIn( 'convert' );
|
|
$retval = 0;
|
|
$err = wfShellExecWithStderr( $cmd, $retval, $env );
|
|
wfProfileOut( 'convert' );
|
|
if ( $retval !== 0 ) {
|
|
$this->logErrorForExternalProcess( $retval, $err, $cmd );
|
|
return new MediaTransformError( 'thumbnail_error', 0, 0, $err );
|
|
}
|
|
return false;
|
|
case 'imext':
|
|
$im = new Imagick();
|
|
$im->readImage( $params['srcPath'] );
|
|
if ( !$im->rotateImage( new ImagickPixel( 'white' ), 360 - $rotation ) ) {
|
|
return new MediaTransformError( 'thumbnail_error', 0, 0,
|
|
"Error rotating $rotation degrees" );
|
|
}
|
|
$result = $im->writeImage( $params['dstPath'] );
|
|
if ( !$result ) {
|
|
return new MediaTransformError( 'thumbnail_error', 0, 0,
|
|
"Unable to write image to {$params['dstPath']}" );
|
|
}
|
|
return false;
|
|
default:
|
|
return new MediaTransformError( 'thumbnail_error', 0, 0,
|
|
"$scaler rotation not implemented" );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Rerurns whether the file needs to be rendered. Returns true if the
|
|
* file requires rotation and we are able to rotate it.
|
|
*
|
|
* @param $file File
|
|
* @return bool
|
|
*/
|
|
public function mustRender( $file ) {
|
|
return self::canRotate() && $this->getRotation( $file ) != 0;
|
|
}
|
|
}
|