Remove unused variable in ProfilerMwprof
[mediawiki.git] / includes / media / Bitmap.php
blobe81b37de3782ced3ad7fc849921dcb5485ff8b03
1 <?php
2 /**
3 * Generic handler for bitmap images.
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.
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.
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
20 * @file
21 * @ingroup Media
24 /**
25 * Generic handler for bitmap images
27 * @ingroup Media
29 class BitmapHandler extends TransformationalImageHandler {
31 /**
32 * Returns which scaler type should be used. Creates parent directories
33 * for $dstPath and returns 'client' on error
35 * @param string $dstPath
36 * @param bool $checkDstPath
37 * @return string|Callable One of client, im, custom, gd, imext or an array( object, method )
39 protected function getScalerType( $dstPath, $checkDstPath = true ) {
40 global $wgUseImageResize, $wgUseImageMagick, $wgCustomConvertCommand;
42 if ( !$dstPath && $checkDstPath ) {
43 # No output path available, client side scaling only
44 $scaler = 'client';
45 } elseif ( !$wgUseImageResize ) {
46 $scaler = 'client';
47 } elseif ( $wgUseImageMagick ) {
48 $scaler = 'im';
49 } elseif ( $wgCustomConvertCommand ) {
50 $scaler = 'custom';
51 } elseif ( function_exists( 'imagecreatetruecolor' ) ) {
52 $scaler = 'gd';
53 } elseif ( class_exists( 'Imagick' ) ) {
54 $scaler = 'imext';
55 } else {
56 $scaler = 'client';
59 return $scaler;
62 /**
63 * Transform an image using ImageMagick
65 * @param File $image File associated with this thumbnail
66 * @param array $params Array with scaler params
68 * @return MediaTransformError Error object if error occurred, false (=no error) otherwise
70 protected function transformImageMagick( $image, $params ) {
71 # use ImageMagick
72 global $wgSharpenReductionThreshold, $wgSharpenParameter, $wgMaxAnimatedGifArea,
73 $wgImageMagickTempDir, $wgImageMagickConvertCommand;
75 $quality = array();
76 $sharpen = array();
77 $scene = false;
78 $animation_pre = array();
79 $animation_post = array();
80 $decoderHint = array();
81 if ( $params['mimeType'] == 'image/jpeg' ) {
82 $qualityVal = isset( $params['quality'] ) ? (string)$params['quality'] : null;
83 $quality = array( '-quality', $qualityVal ?: '80' ); // 80%
84 # Sharpening, see bug 6193
85 if ( ( $params['physicalWidth'] + $params['physicalHeight'] )
86 / ( $params['srcWidth'] + $params['srcHeight'] )
87 < $wgSharpenReductionThreshold
88 ) {
89 $sharpen = array( '-sharpen', $wgSharpenParameter );
91 if ( version_compare( $this->getMagickVersion(), "6.5.6" ) >= 0 ) {
92 // JPEG decoder hint to reduce memory, available since IM 6.5.6-2
93 $decoderHint = array( '-define', "jpeg:size={$params['physicalDimensions']}" );
95 } elseif ( $params['mimeType'] == 'image/png' ) {
96 $quality = array( '-quality', '95' ); // zlib 9, adaptive filtering
98 } elseif ( $params['mimeType'] == 'image/gif' ) {
99 if ( $this->getImageArea( $image ) > $wgMaxAnimatedGifArea ) {
100 // Extract initial frame only; we're so big it'll
101 // be a total drag. :P
102 $scene = 0;
103 } elseif ( $this->isAnimatedImage( $image ) ) {
104 // Coalesce is needed to scale animated GIFs properly (bug 1017).
105 $animation_pre = array( '-coalesce' );
106 // We optimize the output, but -optimize is broken,
107 // use optimizeTransparency instead (bug 11822)
108 if ( version_compare( $this->getMagickVersion(), "6.3.5" ) >= 0 ) {
109 $animation_post = array( '-fuzz', '5%', '-layers', 'optimizeTransparency' );
112 } elseif ( $params['mimeType'] == 'image/x-xcf' ) {
113 // Before merging layers, we need to set the background
114 // to be transparent to preserve alpha, as -layers merge
115 // merges all layers on to a canvas filled with the
116 // background colour. After merging we reset the background
117 // to be white for the default background colour setting
118 // in the PNG image (which is used in old IE)
119 $animation_pre = array(
120 '-background', 'transparent',
121 '-layers', 'merge',
122 '-background', 'white',
124 wfSuppressWarnings();
125 $xcfMeta = unserialize( $image->getMetadata() );
126 wfRestoreWarnings();
127 if ( $xcfMeta
128 && isset( $xcfMeta['colorType'] )
129 && $xcfMeta['colorType'] === 'greyscale-alpha'
130 && version_compare( $this->getMagickVersion(), "6.8.9-3" ) < 0
132 // bug 66323 - Greyscale images not rendered properly.
133 // So only take the "red" channel.
134 $channelOnly = array( '-channel', 'R', '-separate' );
135 $animation_pre = array_merge( $animation_pre, $channelOnly );
139 // Use one thread only, to avoid deadlock bugs on OOM
140 $env = array( 'OMP_NUM_THREADS' => 1 );
141 if ( strval( $wgImageMagickTempDir ) !== '' ) {
142 $env['MAGICK_TMPDIR'] = $wgImageMagickTempDir;
145 $rotation = $this->getRotation( $image );
146 list( $width, $height ) = $this->extractPreRotationDimensions( $params, $rotation );
148 $cmd = call_user_func_array( 'wfEscapeShellArg', array_merge(
149 array( $wgImageMagickConvertCommand ),
150 $quality,
151 // Specify white background color, will be used for transparent images
152 // in Internet Explorer/Windows instead of default black.
153 array( '-background', 'white' ),
154 $decoderHint,
155 array( $this->escapeMagickInput( $params['srcPath'], $scene ) ),
156 $animation_pre,
157 // For the -thumbnail option a "!" is needed to force exact size,
158 // or ImageMagick may decide your ratio is wrong and slice off
159 // a pixel.
160 array( '-thumbnail', "{$width}x{$height}!" ),
161 // Add the source url as a comment to the thumb, but don't add the flag if there's no comment
162 ( $params['comment'] !== ''
163 ? array( '-set', 'comment', $this->escapeMagickProperty( $params['comment'] ) )
164 : array() ),
165 array( '-depth', 8 ),
166 $sharpen,
167 array( '-rotate', "-$rotation" ),
168 $animation_post,
169 array( $this->escapeMagickOutput( $params['dstPath'] ) ) ) );
171 wfDebug( __METHOD__ . ": running ImageMagick: $cmd\n" );
172 wfProfileIn( 'convert' );
173 $retval = 0;
174 $err = wfShellExecWithStderr( $cmd, $retval, $env );
175 wfProfileOut( 'convert' );
177 if ( $retval !== 0 ) {
178 $this->logErrorForExternalProcess( $retval, $err, $cmd );
180 return $this->getMediaTransformError( $params, "$err\nError code: $retval" );
183 return false; # No error
187 * Transform an image using the Imagick PHP extension
189 * @param File $image File associated with this thumbnail
190 * @param array $params Array with scaler params
192 * @return MediaTransformError Error object if error occurred, false (=no error) otherwise
194 protected function transformImageMagickExt( $image, $params ) {
195 global $wgSharpenReductionThreshold, $wgSharpenParameter, $wgMaxAnimatedGifArea;
197 try {
198 $im = new Imagick();
199 $im->readImage( $params['srcPath'] );
201 if ( $params['mimeType'] == 'image/jpeg' ) {
202 // Sharpening, see bug 6193
203 if ( ( $params['physicalWidth'] + $params['physicalHeight'] )
204 / ( $params['srcWidth'] + $params['srcHeight'] )
205 < $wgSharpenReductionThreshold
207 // Hack, since $wgSharpenParamater is written specifically for the command line convert
208 list( $radius, $sigma ) = explode( 'x', $wgSharpenParameter );
209 $im->sharpenImage( $radius, $sigma );
211 $qualityVal = isset( $params['quality'] ) ? (string)$params['quality'] : null;
212 $im->setCompressionQuality( $qualityVal ?: 80 );
213 } elseif ( $params['mimeType'] == 'image/png' ) {
214 $im->setCompressionQuality( 95 );
215 } elseif ( $params['mimeType'] == 'image/gif' ) {
216 if ( $this->getImageArea( $image ) > $wgMaxAnimatedGifArea ) {
217 // Extract initial frame only; we're so big it'll
218 // be a total drag. :P
219 $im->setImageScene( 0 );
220 } elseif ( $this->isAnimatedImage( $image ) ) {
221 // Coalesce is needed to scale animated GIFs properly (bug 1017).
222 $im = $im->coalesceImages();
226 $rotation = $this->getRotation( $image );
227 list( $width, $height ) = $this->extractPreRotationDimensions( $params, $rotation );
229 $im->setImageBackgroundColor( new ImagickPixel( 'white' ) );
231 // Call Imagick::thumbnailImage on each frame
232 foreach ( $im as $i => $frame ) {
233 if ( !$frame->thumbnailImage( $width, $height, /* fit */ false ) ) {
234 return $this->getMediaTransformError( $params, "Error scaling frame $i" );
237 $im->setImageDepth( 8 );
239 if ( $rotation ) {
240 if ( !$im->rotateImage( new ImagickPixel( 'white' ), 360 - $rotation ) ) {
241 return $this->getMediaTransformError( $params, "Error rotating $rotation degrees" );
245 if ( $this->isAnimatedImage( $image ) ) {
246 wfDebug( __METHOD__ . ": Writing animated thumbnail\n" );
247 // This is broken somehow... can't find out how to fix it
248 $result = $im->writeImages( $params['dstPath'], true );
249 } else {
250 $result = $im->writeImage( $params['dstPath'] );
252 if ( !$result ) {
253 return $this->getMediaTransformError( $params,
254 "Unable to write thumbnail to {$params['dstPath']}" );
256 } catch ( ImagickException $e ) {
257 return $this->getMediaTransformError( $params, $e->getMessage() );
260 return false;
264 * Transform an image using a custom command
266 * @param File $image File associated with this thumbnail
267 * @param array $params Array with scaler params
269 * @return MediaTransformError Error object if error occurred, false (=no error) otherwise
271 protected function transformCustom( $image, $params ) {
272 # Use a custom convert command
273 global $wgCustomConvertCommand;
275 # Variables: %s %d %w %h
276 $src = wfEscapeShellArg( $params['srcPath'] );
277 $dst = wfEscapeShellArg( $params['dstPath'] );
278 $cmd = $wgCustomConvertCommand;
279 $cmd = str_replace( '%s', $src, str_replace( '%d', $dst, $cmd ) ); # Filenames
280 $cmd = str_replace( '%h', wfEscapeShellArg( $params['physicalHeight'] ),
281 str_replace( '%w', wfEscapeShellArg( $params['physicalWidth'] ), $cmd ) ); # Size
282 wfDebug( __METHOD__ . ": Running custom convert command $cmd\n" );
283 wfProfileIn( 'convert' );
284 $retval = 0;
285 $err = wfShellExecWithStderr( $cmd, $retval );
286 wfProfileOut( 'convert' );
288 if ( $retval !== 0 ) {
289 $this->logErrorForExternalProcess( $retval, $err, $cmd );
291 return $this->getMediaTransformError( $params, $err );
294 return false; # No error
298 * Transform an image using the built in GD library
300 * @param File $image File associated with this thumbnail
301 * @param array $params Array with scaler params
303 * @return MediaTransformError Error object if error occurred, false (=no error) otherwise
305 protected function transformGd( $image, $params ) {
306 # Use PHP's builtin GD library functions.
308 # First find out what kind of file this is, and select the correct
309 # input routine for this.
311 $typemap = array(
312 'image/gif' => array( 'imagecreatefromgif', 'palette', false, 'imagegif' ),
313 'image/jpeg' => array( 'imagecreatefromjpeg', 'truecolor', true,
314 array( __CLASS__, 'imageJpegWrapper' ) ),
315 'image/png' => array( 'imagecreatefrompng', 'bits', false, 'imagepng' ),
316 'image/vnd.wap.wbmp' => array( 'imagecreatefromwbmp', 'palette', false, 'imagewbmp' ),
317 'image/xbm' => array( 'imagecreatefromxbm', 'palette', false, 'imagexbm' ),
320 if ( !isset( $typemap[$params['mimeType']] ) ) {
321 $err = 'Image type not supported';
322 wfDebug( "$err\n" );
323 $errMsg = wfMessage( 'thumbnail_image-type' )->text();
325 return $this->getMediaTransformError( $params, $errMsg );
327 list( $loader, $colorStyle, $useQuality, $saveType ) = $typemap[$params['mimeType']];
329 if ( !function_exists( $loader ) ) {
330 $err = "Incomplete GD library configuration: missing function $loader";
331 wfDebug( "$err\n" );
332 $errMsg = wfMessage( 'thumbnail_gd-library', $loader )->text();
334 return $this->getMediaTransformError( $params, $errMsg );
337 if ( !file_exists( $params['srcPath'] ) ) {
338 $err = "File seems to be missing: {$params['srcPath']}";
339 wfDebug( "$err\n" );
340 $errMsg = wfMessage( 'thumbnail_image-missing', $params['srcPath'] )->text();
342 return $this->getMediaTransformError( $params, $errMsg );
345 $src_image = call_user_func( $loader, $params['srcPath'] );
347 $rotation = function_exists( 'imagerotate' ) ? $this->getRotation( $image ) : 0;
348 list( $width, $height ) = $this->extractPreRotationDimensions( $params, $rotation );
349 $dst_image = imagecreatetruecolor( $width, $height );
351 // Initialise the destination image to transparent instead of
352 // the default solid black, to support PNG and GIF transparency nicely
353 $background = imagecolorallocate( $dst_image, 0, 0, 0 );
354 imagecolortransparent( $dst_image, $background );
355 imagealphablending( $dst_image, false );
357 if ( $colorStyle == 'palette' ) {
358 // Don't resample for paletted GIF images.
359 // It may just uglify them, and completely breaks transparency.
360 imagecopyresized( $dst_image, $src_image,
361 0, 0, 0, 0,
362 $width, $height,
363 imagesx( $src_image ), imagesy( $src_image ) );
364 } else {
365 imagecopyresampled( $dst_image, $src_image,
366 0, 0, 0, 0,
367 $width, $height,
368 imagesx( $src_image ), imagesy( $src_image ) );
371 if ( $rotation % 360 != 0 && $rotation % 90 == 0 ) {
372 $rot_image = imagerotate( $dst_image, $rotation, 0 );
373 imagedestroy( $dst_image );
374 $dst_image = $rot_image;
377 imagesavealpha( $dst_image, true );
379 $funcParams = array( $dst_image, $params['dstPath'] );
380 if ( $useQuality && isset( $params['quality'] ) ) {
381 $funcParams[] = $params['quality'];
383 call_user_func_array( $saveType, $funcParams );
385 imagedestroy( $dst_image );
386 imagedestroy( $src_image );
388 return false; # No error
392 * Callback for transformGd when transforming jpeg images.
394 // FIXME: transformImageMagick() & transformImageMagickExt() uses JPEG quality 80, here it's 95?
395 static function imageJpegWrapper( $dst_image, $thumbPath, $quality = 95 ) {
396 imageinterlace( $dst_image );
397 imagejpeg( $dst_image, $thumbPath, $quality );
401 * Returns whether the current scaler supports rotation (im and gd do)
403 * @return bool
405 public function canRotate() {
406 $scaler = $this->getScalerType( null, false );
407 switch ( $scaler ) {
408 case 'im':
409 # ImageMagick supports autorotation
410 return true;
411 case 'imext':
412 # Imagick::rotateImage
413 return true;
414 case 'gd':
415 # GD's imagerotate function is used to rotate images, but not
416 # all precompiled PHP versions have that function
417 return function_exists( 'imagerotate' );
418 default:
419 # Other scalers don't support rotation
420 return false;
425 * @see $wgEnableAutoRotation
426 * @return bool Whether auto rotation is enabled
428 public function autoRotateEnabled() {
429 global $wgEnableAutoRotation;
431 if ( $wgEnableAutoRotation === null ) {
432 // Only enable auto-rotation when we actually can
433 return $this->canRotate();
436 return $wgEnableAutoRotation;
440 * @param File $file
441 * @param array $params Rotate parameters.
442 * 'rotation' clockwise rotation in degrees, allowed are multiples of 90
443 * @since 1.21
444 * @return bool
446 public function rotate( $file, $params ) {
447 global $wgImageMagickConvertCommand;
449 $rotation = ( $params['rotation'] + $this->getRotation( $file ) ) % 360;
450 $scene = false;
452 $scaler = $this->getScalerType( null, false );
453 switch ( $scaler ) {
454 case 'im':
455 $cmd = wfEscapeShellArg( $wgImageMagickConvertCommand ) . " " .
456 wfEscapeShellArg( $this->escapeMagickInput( $params['srcPath'], $scene ) ) .
457 " -rotate " . wfEscapeShellArg( "-$rotation" ) . " " .
458 wfEscapeShellArg( $this->escapeMagickOutput( $params['dstPath'] ) );
459 wfDebug( __METHOD__ . ": running ImageMagick: $cmd\n" );
460 wfProfileIn( 'convert' );
461 $retval = 0;
462 $err = wfShellExecWithStderr( $cmd, $retval );
463 wfProfileOut( 'convert' );
464 if ( $retval !== 0 ) {
465 $this->logErrorForExternalProcess( $retval, $err, $cmd );
467 return new MediaTransformError( 'thumbnail_error', 0, 0, $err );
470 return false;
471 case 'imext':
472 $im = new Imagick();
473 $im->readImage( $params['srcPath'] );
474 if ( !$im->rotateImage( new ImagickPixel( 'white' ), 360 - $rotation ) ) {
475 return new MediaTransformError( 'thumbnail_error', 0, 0,
476 "Error rotating $rotation degrees" );
478 $result = $im->writeImage( $params['dstPath'] );
479 if ( !$result ) {
480 return new MediaTransformError( 'thumbnail_error', 0, 0,
481 "Unable to write image to {$params['dstPath']}" );
484 return false;
485 default:
486 return new MediaTransformError( 'thumbnail_error', 0, 0,
487 "$scaler rotation not implemented" );