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| 1 | <?php |
| 2 | /** |
| 3 | * Generic handler for bitmap 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 | use MediaWiki\Shell\Shell; |
| 27 | |
| 28 | /** |
| 29 | * Generic handler for bitmap images |
| 30 | * |
| 31 | * @stable to extend |
| 32 | * @ingroup Media |
| 33 | */ |
| 34 | class BitmapHandler extends TransformationalImageHandler { |
| 35 | |
| 36 | /** |
| 37 | * Returns which scaler type should be used. Creates parent directories |
| 38 | * for $dstPath and returns 'client' on error |
| 39 | * @stable to override |
| 40 | * |
| 41 | * @param string|null $dstPath |
| 42 | * @param bool $checkDstPath |
| 43 | * @return string|callable One of client, im, custom, gd, imext or an array( object, method ) |
| 44 | */ |
| 45 | protected function getScalerType( $dstPath, $checkDstPath = true ) { |
| 46 | $mainConfig = MediaWikiServices::getInstance()->getMainConfig(); |
| 47 | $useImageResize = $mainConfig->get( MainConfigNames::UseImageResize ); |
| 48 | $useImageMagick = $mainConfig->get( MainConfigNames::UseImageMagick ); |
| 49 | $customConvertCommand = $mainConfig->get( MainConfigNames::CustomConvertCommand ); |
| 50 | if ( !$dstPath && $checkDstPath ) { |
| 51 | # No output path available, client side scaling only |
| 52 | $scaler = 'client'; |
| 53 | } elseif ( !$useImageResize ) { |
| 54 | $scaler = 'client'; |
| 55 | } elseif ( $useImageMagick ) { |
| 56 | $scaler = 'im'; |
| 57 | } elseif ( $customConvertCommand ) { |
| 58 | $scaler = 'custom'; |
| 59 | } elseif ( $this->hasGDSupport() && function_exists( 'imagecreatetruecolor' ) ) { |
| 60 | $scaler = 'gd'; |
| 61 | } elseif ( class_exists( 'Imagick' ) ) { |
| 62 | $scaler = 'imext'; |
| 63 | } else { |
| 64 | $scaler = 'client'; |
| 65 | } |
| 66 | |
| 67 | return $scaler; |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * Whether the php-gd extension supports this type of file. |
| 72 | * |
| 73 | * @stable to override |
| 74 | * @return bool |
| 75 | */ |
| 76 | protected function hasGDSupport() { |
| 77 | return true; |
| 78 | } |
| 79 | |
| 80 | /** |
| 81 | * @inheritDoc |
| 82 | * @stable to override |
| 83 | */ |
| 84 | public function makeParamString( $params ) { |
| 85 | $res = parent::makeParamString( $params ); |
| 86 | if ( isset( $params['interlace'] ) && $params['interlace'] ) { |
| 87 | return "interlaced-$res"; |
| 88 | } |
| 89 | return $res; |
| 90 | } |
| 91 | |
| 92 | /** |
| 93 | * @inheritDoc |
| 94 | * @stable to override |
| 95 | */ |
| 96 | public function parseParamString( $str ) { |
| 97 | $remainder = preg_replace( '/^interlaced-/', '', $str ); |
| 98 | $params = parent::parseParamString( $remainder ); |
| 99 | if ( $params === false ) { |
| 100 | return false; |
| 101 | } |
| 102 | $params['interlace'] = $str !== $remainder; |
| 103 | return $params; |
| 104 | } |
| 105 | |
| 106 | /** |
| 107 | * @inheritDoc |
| 108 | * @stable to override |
| 109 | */ |
| 110 | public function validateParam( $name, $value ) { |
| 111 | if ( $name === 'interlace' ) { |
| 112 | return $value === false || $value === true; |
| 113 | } |
| 114 | return parent::validateParam( $name, $value ); |
| 115 | } |
| 116 | |
| 117 | /** |
| 118 | * @stable to override |
| 119 | * @param File $image |
| 120 | * @param array &$params |
| 121 | * @return bool |
| 122 | */ |
| 123 | public function normaliseParams( $image, &$params ) { |
| 124 | $maxInterlacingAreas = MediaWikiServices::getInstance()->getMainConfig() |
| 125 | ->get( MainConfigNames::MaxInterlacingAreas ); |
| 126 | if ( !parent::normaliseParams( $image, $params ) ) { |
| 127 | return false; |
| 128 | } |
| 129 | $mimeType = $image->getMimeType(); |
| 130 | $interlace = isset( $params['interlace'] ) && $params['interlace'] |
| 131 | && isset( $maxInterlacingAreas[$mimeType] ) |
| 132 | && $this->getImageArea( $image ) <= $maxInterlacingAreas[$mimeType]; |
| 133 | $params['interlace'] = $interlace; |
| 134 | return true; |
| 135 | } |
| 136 | |
| 137 | /** |
| 138 | * Get ImageMagick subsampling factors for the target JPEG pixel format. |
| 139 | * |
| 140 | * @param string $pixelFormat one of 'yuv444', 'yuv422', 'yuv420' |
| 141 | * @return string[] List of sampling factors |
| 142 | */ |
| 143 | protected function imageMagickSubsampling( $pixelFormat ) { |
| 144 | switch ( $pixelFormat ) { |
| 145 | case 'yuv444': |
| 146 | return [ '1x1', '1x1', '1x1' ]; |
| 147 | case 'yuv422': |
| 148 | return [ '2x1', '1x1', '1x1' ]; |
| 149 | case 'yuv420': |
| 150 | return [ '2x2', '1x1', '1x1' ]; |
| 151 | default: |
| 152 | throw new UnexpectedValueException( 'Invalid pixel format for JPEG output' ); |
| 153 | } |
| 154 | } |
| 155 | |
| 156 | /** |
| 157 | * Transform an image using ImageMagick |
| 158 | * @stable to override |
| 159 | * |
| 160 | * @param File $image File associated with this thumbnail |
| 161 | * @param array $params Array with scaler params |
| 162 | * |
| 163 | * @return MediaTransformError|false Error object if error occurred, false (=no error) otherwise |
| 164 | */ |
| 165 | protected function transformImageMagick( $image, $params ) { |
| 166 | # use ImageMagick |
| 167 | $mainConfig = MediaWikiServices::getInstance()->getMainConfig(); |
| 168 | $sharpenReductionThreshold = $mainConfig->get( MainConfigNames::SharpenReductionThreshold ); |
| 169 | $sharpenParameter = $mainConfig->get( MainConfigNames::SharpenParameter ); |
| 170 | $maxAnimatedGifArea = $mainConfig->get( MainConfigNames::MaxAnimatedGifArea ); |
| 171 | $imageMagickTempDir = $mainConfig->get( MainConfigNames::ImageMagickTempDir ); |
| 172 | $imageMagickConvertCommand = $mainConfig->get( MainConfigNames::ImageMagickConvertCommand ); |
| 173 | $jpegPixelFormat = $mainConfig->get( MainConfigNames::JpegPixelFormat ); |
| 174 | $jpegQuality = $mainConfig->get( MainConfigNames::JpegQuality ); |
| 175 | $quality = []; |
| 176 | $sharpen = []; |
| 177 | $scene = false; |
| 178 | $animation_pre = []; |
| 179 | $animation_post = []; |
| 180 | $decoderHint = []; |
| 181 | $subsampling = []; |
| 182 | |
| 183 | if ( $params['mimeType'] === 'image/jpeg' ) { |
| 184 | $qualityVal = isset( $params['quality'] ) ? (string)$params['quality'] : null; |
| 185 | $quality = [ '-quality', $qualityVal ?: (string)$jpegQuality ]; // 80% by default |
| 186 | if ( $params['interlace'] ) { |
| 187 | $animation_post = [ '-interlace', 'JPEG' ]; |
| 188 | } |
| 189 | # Sharpening, see T8193 |
| 190 | if ( ( $params['physicalWidth'] + $params['physicalHeight'] ) |
| 191 | / ( $params['srcWidth'] + $params['srcHeight'] ) |
| 192 | < $sharpenReductionThreshold |
| 193 | ) { |
| 194 | $sharpen = [ '-sharpen', $sharpenParameter ]; |
| 195 | } |
| 196 | |
| 197 | // JPEG decoder hint to reduce memory, available since IM 6.5.6-2 |
| 198 | $decoderHint = [ '-define', "jpeg:size={$params['physicalDimensions']}" ]; |
| 199 | |
| 200 | if ( $jpegPixelFormat ) { |
| 201 | $factors = $this->imageMagickSubsampling( $jpegPixelFormat ); |
| 202 | $subsampling = [ '-sampling-factor', implode( ',', $factors ) ]; |
| 203 | } |
| 204 | } elseif ( $params['mimeType'] === 'image/png' ) { |
| 205 | $quality = [ '-quality', '95' ]; // zlib 9, adaptive filtering |
| 206 | if ( $params['interlace'] ) { |
| 207 | $animation_post = [ '-interlace', 'PNG' ]; |
| 208 | } |
| 209 | } elseif ( $params['mimeType'] === 'image/webp' ) { |
| 210 | $quality = [ '-quality', '95' ]; // zlib 9, adaptive filtering |
| 211 | } elseif ( $params['mimeType'] === 'image/gif' ) { |
| 212 | if ( $this->getImageArea( $image ) > $maxAnimatedGifArea ) { |
| 213 | // Extract initial frame only; we're so big it'll |
| 214 | // be a total drag. :P |
| 215 | $scene = 0; |
| 216 | } elseif ( $this->isAnimatedImage( $image ) ) { |
| 217 | // Coalesce is needed to scale animated GIFs properly (T3017). |
| 218 | $animation_pre = [ '-coalesce' ]; |
| 219 | |
| 220 | // We optimize the output, but -optimize is broken, |
| 221 | // use optimizeTransparency instead (T13822). Version >= IM 6.3.5 |
| 222 | $animation_post = [ '-fuzz', '5%', '-layers', 'optimizeTransparency' ]; |
| 223 | } |
| 224 | if ( $params['interlace'] && !$this->isAnimatedImage( $image ) ) { |
| 225 | // Version >= IM 6.3.4 |
| 226 | // interlacing animated GIFs is a bad idea |
| 227 | $animation_post[] = '-interlace'; |
| 228 | $animation_post[] = 'GIF'; |
| 229 | } |
| 230 | } elseif ( $params['mimeType'] === 'image/x-xcf' ) { |
| 231 | // Before merging layers, we need to set the background |
| 232 | // to be transparent to preserve alpha, as -layers merge |
| 233 | // merges all layers on to a canvas filled with the |
| 234 | // background colour. After merging we reset the background |
| 235 | // to be white for the default background colour setting |
| 236 | // in the PNG image (which is used in old IE) |
| 237 | $animation_pre = [ |
| 238 | '-background', 'transparent', |
| 239 | '-layers', 'merge', |
| 240 | '-background', 'white', |
| 241 | ]; |
| 242 | } |
| 243 | |
| 244 | // Use one thread only, to avoid deadlock bugs on OOM |
| 245 | $env = [ 'OMP_NUM_THREADS' => 1 ]; |
| 246 | if ( (string)$imageMagickTempDir !== '' ) { |
| 247 | $env['MAGICK_TMPDIR'] = $imageMagickTempDir; |
| 248 | } |
| 249 | |
| 250 | $rotation = isset( $params['disableRotation'] ) ? 0 : $this->getRotation( $image ); |
| 251 | [ $width, $height ] = $this->extractPreRotationDimensions( $params, $rotation ); |
| 252 | |
| 253 | $cmd = Shell::escape( ...array_merge( |
| 254 | [ $imageMagickConvertCommand ], |
| 255 | $quality, |
| 256 | // Specify white background color, will be used for transparent images |
| 257 | // in Internet Explorer/Windows instead of default black. |
| 258 | [ '-background', 'white' ], |
| 259 | $decoderHint, |
| 260 | [ $this->escapeMagickInput( $params['srcPath'], $scene ) ], |
| 261 | $animation_pre, |
| 262 | // For the -thumbnail option a "!" is needed to force exact size, |
| 263 | // or ImageMagick may decide your ratio is wrong and slice off |
| 264 | // a pixel. |
| 265 | [ '-thumbnail', "{$width}x{$height}!" ], |
| 266 | // Add the source url as a comment to the thumb, but don't add the flag if there's no comment |
| 267 | ( $params['comment'] !== '' |
| 268 | ? [ '-set', 'comment', $this->escapeMagickProperty( $params['comment'] ) ] |
| 269 | : [] ), |
| 270 | // T108616: Avoid exposure of local file path |
| 271 | [ '+set', 'Thumb::URI' ], |
| 272 | [ '-depth', 8 ], |
| 273 | $sharpen, |
| 274 | [ '-rotate', "-$rotation" ], |
| 275 | $subsampling, |
| 276 | $animation_post, |
| 277 | [ $this->escapeMagickOutput( $params['dstPath'] ) ] ) ); |
| 278 | |
| 279 | wfDebug( __METHOD__ . ": running ImageMagick: $cmd" ); |
| 280 | $retval = 0; |
| 281 | $err = wfShellExecWithStderr( $cmd, $retval, $env ); |
| 282 | |
| 283 | if ( $retval !== 0 ) { |
| 284 | $this->logErrorForExternalProcess( $retval, $err, $cmd ); |
| 285 | |
| 286 | return $this->getMediaTransformError( $params, "$err\nError code: $retval" ); |
| 287 | } |
| 288 | |
| 289 | return false; # No error |
| 290 | } |
| 291 | |
| 292 | /** |
| 293 | * Transform an image using the Imagick PHP extension |
| 294 | * |
| 295 | * @param File $image File associated with this thumbnail |
| 296 | * @param array $params Array with scaler params |
| 297 | * |
| 298 | * @return MediaTransformError|false Error object if error occurred, false (=no error) otherwise |
| 299 | */ |
| 300 | protected function transformImageMagickExt( $image, $params ) { |
| 301 | $mainConfig = MediaWikiServices::getInstance()->getMainConfig(); |
| 302 | $sharpenReductionThreshold = $mainConfig->get( MainConfigNames::SharpenReductionThreshold ); |
| 303 | $sharpenParameter = $mainConfig->get( MainConfigNames::SharpenParameter ); |
| 304 | $maxAnimatedGifArea = $mainConfig->get( MainConfigNames::MaxAnimatedGifArea ); |
| 305 | $jpegPixelFormat = $mainConfig->get( MainConfigNames::JpegPixelFormat ); |
| 306 | $jpegQuality = $mainConfig->get( MainConfigNames::JpegQuality ); |
| 307 | try { |
| 308 | $im = new Imagick(); |
| 309 | $im->readImage( $params['srcPath'] ); |
| 310 | |
| 311 | if ( $params['mimeType'] === 'image/jpeg' ) { |
| 312 | // Sharpening, see T8193 |
| 313 | if ( ( $params['physicalWidth'] + $params['physicalHeight'] ) |
| 314 | / ( $params['srcWidth'] + $params['srcHeight'] ) |
| 315 | < $sharpenReductionThreshold |
| 316 | ) { |
| 317 | // Hack, since $wgSharpenParameter is written specifically for the command line convert |
| 318 | [ $radius, $sigma ] = explode( 'x', $sharpenParameter, 2 ); |
| 319 | $im->sharpenImage( (float)$radius, (float)$sigma ); |
| 320 | } |
| 321 | $qualityVal = isset( $params['quality'] ) ? (string)$params['quality'] : null; |
| 322 | $im->setCompressionQuality( $qualityVal ?: $jpegQuality ); |
| 323 | if ( $params['interlace'] ) { |
| 324 | $im->setInterlaceScheme( Imagick::INTERLACE_JPEG ); |
| 325 | } |
| 326 | if ( $jpegPixelFormat ) { |
| 327 | $factors = $this->imageMagickSubsampling( $jpegPixelFormat ); |
| 328 | $im->setSamplingFactors( $factors ); |
| 329 | } |
| 330 | } elseif ( $params['mimeType'] === 'image/png' ) { |
| 331 | $im->setCompressionQuality( 95 ); |
| 332 | if ( $params['interlace'] ) { |
| 333 | $im->setInterlaceScheme( Imagick::INTERLACE_PNG ); |
| 334 | } |
| 335 | } elseif ( $params['mimeType'] === 'image/gif' ) { |
| 336 | if ( $this->getImageArea( $image ) > $maxAnimatedGifArea ) { |
| 337 | // Extract initial frame only; we're so big it'll |
| 338 | // be a total drag. :P |
| 339 | $im->setImageScene( 0 ); |
| 340 | } elseif ( $this->isAnimatedImage( $image ) ) { |
| 341 | // Coalesce is needed to scale animated GIFs properly (T3017). |
| 342 | $im = $im->coalesceImages(); |
| 343 | } |
| 344 | // GIF interlacing is only available since 6.3.4 |
| 345 | if ( $params['interlace'] ) { |
| 346 | $im->setInterlaceScheme( Imagick::INTERLACE_GIF ); |
| 347 | } |
| 348 | } |
| 349 | |
| 350 | $rotation = isset( $params['disableRotation'] ) ? 0 : $this->getRotation( $image ); |
| 351 | [ $width, $height ] = $this->extractPreRotationDimensions( $params, $rotation ); |
| 352 | |
| 353 | $im->setImageBackgroundColor( new ImagickPixel( 'white' ) ); |
| 354 | |
| 355 | // Call Imagick::thumbnailImage on each frame |
| 356 | foreach ( $im as $i => $frame ) { |
| 357 | if ( !$frame->thumbnailImage( $width, $height, /* fit */ false ) ) { |
| 358 | return $this->getMediaTransformError( $params, "Error scaling frame $i" ); |
| 359 | } |
| 360 | } |
| 361 | $im->setImageDepth( 8 ); |
| 362 | |
| 363 | if ( $rotation && !$im->rotateImage( new ImagickPixel( 'white' ), 360 - $rotation ) ) { |
| 364 | return $this->getMediaTransformError( $params, "Error rotating $rotation degrees" ); |
| 365 | } |
| 366 | |
| 367 | if ( $this->isAnimatedImage( $image ) ) { |
| 368 | wfDebug( __METHOD__ . ": Writing animated thumbnail" ); |
| 369 | // This is broken somehow... can't find out how to fix it |
| 370 | $result = $im->writeImages( $params['dstPath'], true ); |
| 371 | } else { |
| 372 | $result = $im->writeImage( $params['dstPath'] ); |
| 373 | } |
| 374 | if ( !$result ) { |
| 375 | return $this->getMediaTransformError( $params, |
| 376 | "Unable to write thumbnail to {$params['dstPath']}" ); |
| 377 | } |
| 378 | } catch ( ImagickException $e ) { |
| 379 | return $this->getMediaTransformError( $params, $e->getMessage() ); |
| 380 | } |
| 381 | |
| 382 | return false; |
| 383 | } |
| 384 | |
| 385 | /** |
| 386 | * Transform an image using a custom command |
| 387 | * |
| 388 | * @param File $image File associated with this thumbnail |
| 389 | * @param array $params Array with scaler params |
| 390 | * |
| 391 | * @return MediaTransformError|false Error object if error occurred, false (=no error) otherwise |
| 392 | */ |
| 393 | protected function transformCustom( $image, $params ) { |
| 394 | // Use a custom convert command |
| 395 | $customConvertCommand = MediaWikiServices::getInstance()->getMainConfig() |
| 396 | ->get( MainConfigNames::CustomConvertCommand ); |
| 397 | |
| 398 | // Find all variables in the original command at once, |
| 399 | // so that replacement values cannot inject variable placeholders |
| 400 | $cmd = strtr( $customConvertCommand, [ |
| 401 | '%s' => Shell::escape( $params['srcPath'] ), |
| 402 | '%d' => Shell::escape( $params['dstPath'] ), |
| 403 | '%w' => Shell::escape( $params['physicalWidth'] ), |
| 404 | '%h' => Shell::escape( $params['physicalHeight'] ), |
| 405 | ] ); |
| 406 | wfDebug( __METHOD__ . ": Running custom convert command $cmd" ); |
| 407 | $retval = 0; |
| 408 | $err = wfShellExecWithStderr( $cmd, $retval ); |
| 409 | |
| 410 | if ( $retval !== 0 ) { |
| 411 | $this->logErrorForExternalProcess( $retval, $err, $cmd ); |
| 412 | |
| 413 | return $this->getMediaTransformError( $params, $err ); |
| 414 | } |
| 415 | |
| 416 | return false; # No error |
| 417 | } |
| 418 | |
| 419 | /** |
| 420 | * Transform an image using the built in GD library |
| 421 | * |
| 422 | * @param File $image File associated with this thumbnail |
| 423 | * @param array $params Array with scaler params |
| 424 | * |
| 425 | * @return MediaTransformError|false Error object if error occurred, false (=no error) otherwise |
| 426 | */ |
| 427 | protected function transformGd( $image, $params ) { |
| 428 | # Use PHP's builtin GD library functions. |
| 429 | # First find out what kind of file this is, and select the correct |
| 430 | # input routine for this. |
| 431 | |
| 432 | $typemap = [ |
| 433 | 'image/gif' => [ 'imagecreatefromgif', 'palette', false, 'imagegif' ], |
| 434 | 'image/jpeg' => [ 'imagecreatefromjpeg', 'truecolor', true, |
| 435 | [ __CLASS__, 'imageJpegWrapper' ] ], |
| 436 | 'image/png' => [ 'imagecreatefrompng', 'bits', false, 'imagepng' ], |
| 437 | 'image/vnd.wap.wbmp' => [ 'imagecreatefromwbmp', 'palette', false, 'imagewbmp' ], |
| 438 | 'image/xbm' => [ 'imagecreatefromxbm', 'palette', false, 'imagexbm' ], |
| 439 | ]; |
| 440 | |
| 441 | if ( !isset( $typemap[$params['mimeType']] ) ) { |
| 442 | $err = 'Image type not supported'; |
| 443 | wfDebug( $err ); |
| 444 | $errMsg = wfMessage( 'thumbnail_image-type' )->text(); |
| 445 | |
| 446 | return $this->getMediaTransformError( $params, $errMsg ); |
| 447 | } |
| 448 | [ $loader, $colorStyle, $useQuality, $saveType ] = $typemap[$params['mimeType']]; |
| 449 | |
| 450 | if ( !function_exists( $loader ) ) { |
| 451 | $err = "Incomplete GD library configuration: missing function $loader"; |
| 452 | wfDebug( $err ); |
| 453 | $errMsg = wfMessage( 'thumbnail_gd-library', $loader )->text(); |
| 454 | |
| 455 | return $this->getMediaTransformError( $params, $errMsg ); |
| 456 | } |
| 457 | |
| 458 | if ( !file_exists( $params['srcPath'] ) ) { |
| 459 | $err = "File seems to be missing: {$params['srcPath']}"; |
| 460 | wfDebug( $err ); |
| 461 | $errMsg = wfMessage( 'thumbnail_image-missing', $params['srcPath'] )->text(); |
| 462 | |
| 463 | return $this->getMediaTransformError( $params, $errMsg ); |
| 464 | } |
| 465 | |
| 466 | if ( filesize( $params['srcPath'] ) === 0 ) { |
| 467 | $err = "Image file size seems to be zero."; |
| 468 | wfDebug( $err ); |
| 469 | $errMsg = wfMessage( 'thumbnail_image-size-zero', $params['srcPath'] )->text(); |
| 470 | |
| 471 | return $this->getMediaTransformError( $params, $errMsg ); |
| 472 | } |
| 473 | |
| 474 | $src_image = $loader( $params['srcPath'] ); |
| 475 | |
| 476 | $rotation = function_exists( 'imagerotate' ) && !isset( $params['disableRotation'] ) ? |
| 477 | $this->getRotation( $image ) : |
| 478 | 0; |
| 479 | [ $width, $height ] = $this->extractPreRotationDimensions( $params, $rotation ); |
| 480 | $dst_image = imagecreatetruecolor( $width, $height ); |
| 481 | |
| 482 | // Initialise the destination image to transparent instead of |
| 483 | // the default solid black, to support PNG and GIF transparency nicely |
| 484 | $background = imagecolorallocate( $dst_image, 0, 0, 0 ); |
| 485 | imagecolortransparent( $dst_image, $background ); |
| 486 | imagealphablending( $dst_image, false ); |
| 487 | |
| 488 | if ( $colorStyle === 'palette' ) { |
| 489 | // Don't resample for paletted GIF images. |
| 490 | // It may just uglify them, and completely breaks transparency. |
| 491 | imagecopyresized( $dst_image, $src_image, |
| 492 | 0, 0, 0, 0, |
| 493 | $width, $height, |
| 494 | imagesx( $src_image ), imagesy( $src_image ) ); |
| 495 | } else { |
| 496 | imagecopyresampled( $dst_image, $src_image, |
| 497 | 0, 0, 0, 0, |
| 498 | $width, $height, |
| 499 | imagesx( $src_image ), imagesy( $src_image ) ); |
| 500 | } |
| 501 | |
| 502 | if ( $rotation % 360 !== 0 && $rotation % 90 === 0 ) { |
| 503 | $rot_image = imagerotate( $dst_image, $rotation, 0 ); |
| 504 | imagedestroy( $dst_image ); |
| 505 | $dst_image = $rot_image; |
| 506 | } |
| 507 | |
| 508 | imagesavealpha( $dst_image, true ); |
| 509 | |
| 510 | $funcParams = [ $dst_image, $params['dstPath'] ]; |
| 511 | if ( $useQuality && isset( $params['quality'] ) ) { |
| 512 | $funcParams[] = $params['quality']; |
| 513 | } |
| 514 | // @phan-suppress-next-line PhanParamTooFewInternalUnpack,PhanParamTooFewUnpack There are at least 2 args |
| 515 | $saveType( ...$funcParams ); |
| 516 | |
| 517 | imagedestroy( $dst_image ); |
| 518 | imagedestroy( $src_image ); |
| 519 | |
| 520 | return false; # No error |
| 521 | } |
| 522 | |
| 523 | /** |
| 524 | * Callback for transformGd when transforming jpeg images. |
| 525 | * |
| 526 | * @phpcs:ignore MediaWiki.Commenting.FunctionComment.ObjectTypeHintParam |
| 527 | * @param resource|object $dst_image Image resource of the original image |
| 528 | * @param string $thumbPath File path to write the thumbnail image to |
| 529 | * @param int|null $quality Quality of the thumbnail from 1-100, |
| 530 | * or null to use default quality. |
| 531 | */ |
| 532 | public static function imageJpegWrapper( $dst_image, $thumbPath, $quality = null ) { |
| 533 | $jpegQuality = MediaWikiServices::getInstance()->getMainConfig()->get( MainConfigNames::JpegQuality ); |
| 534 | |
| 535 | imageinterlace( $dst_image ); |
| 536 | imagejpeg( $dst_image, $thumbPath, $quality ?? $jpegQuality ); |
| 537 | } |
| 538 | |
| 539 | /** |
| 540 | * Returns whether the current scaler supports rotation (im and gd do) |
| 541 | * @stable to override |
| 542 | * |
| 543 | * @return bool |
| 544 | */ |
| 545 | public function canRotate() { |
| 546 | $scaler = $this->getScalerType( null, false ); |
| 547 | switch ( $scaler ) { |
| 548 | case 'im': |
| 549 | # ImageMagick supports autorotation |
| 550 | return true; |
| 551 | case 'imext': |
| 552 | # Imagick::rotateImage |
| 553 | return true; |
| 554 | case 'gd': |
| 555 | # GD's imagerotate function is used to rotate images, but not |
| 556 | # all precompiled PHP versions have that function |
| 557 | return function_exists( 'imagerotate' ); |
| 558 | default: |
| 559 | # Other scalers don't support rotation |
| 560 | return false; |
| 561 | } |
| 562 | } |
| 563 | |
| 564 | /** |
| 565 | * @see $wgEnableAutoRotation |
| 566 | * @stable to override |
| 567 | * @return bool Whether auto rotation is enabled |
| 568 | */ |
| 569 | public function autoRotateEnabled() { |
| 570 | $enableAutoRotation = MediaWikiServices::getInstance()->getMainConfig() |
| 571 | ->get( MainConfigNames::EnableAutoRotation ); |
| 572 | |
| 573 | if ( $enableAutoRotation === null ) { |
| 574 | // Only enable auto-rotation when we actually can |
| 575 | return $this->canRotate(); |
| 576 | } |
| 577 | |
| 578 | return $enableAutoRotation; |
| 579 | } |
| 580 | |
| 581 | /** |
| 582 | * @stable to override |
| 583 | * @param File $file |
| 584 | * @param array $params Rotate parameters. |
| 585 | * 'rotation' clockwise rotation in degrees, allowed are multiples of 90 |
| 586 | * @since 1.21 |
| 587 | * @return MediaTransformError|false |
| 588 | */ |
| 589 | public function rotate( $file, $params ) { |
| 590 | $imageMagickConvertCommand = MediaWikiServices::getInstance() |
| 591 | ->getMainConfig()->get( MainConfigNames::ImageMagickConvertCommand ); |
| 592 | |
| 593 | $rotation = ( $params['rotation'] + $this->getRotation( $file ) ) % 360; |
| 594 | $scene = false; |
| 595 | |
| 596 | $scaler = $this->getScalerType( null, false ); |
| 597 | switch ( $scaler ) { |
| 598 | case 'im': |
| 599 | $cmd = Shell::escape( $imageMagickConvertCommand ) . " " . |
| 600 | Shell::escape( $this->escapeMagickInput( $params['srcPath'], $scene ) ) . |
| 601 | " -rotate " . Shell::escape( "-$rotation" ) . " " . |
| 602 | Shell::escape( $this->escapeMagickOutput( $params['dstPath'] ) ); |
| 603 | wfDebug( __METHOD__ . ": running ImageMagick: $cmd" ); |
| 604 | $retval = 0; |
| 605 | $err = wfShellExecWithStderr( $cmd, $retval ); |
| 606 | if ( $retval !== 0 ) { |
| 607 | $this->logErrorForExternalProcess( $retval, $err, $cmd ); |
| 608 | |
| 609 | return new MediaTransformError( 'thumbnail_error', 0, 0, $err ); |
| 610 | } |
| 611 | |
| 612 | return false; |
| 613 | case 'imext': |
| 614 | $im = new Imagick(); |
| 615 | $im->readImage( $params['srcPath'] ); |
| 616 | if ( !$im->rotateImage( new ImagickPixel( 'white' ), 360 - $rotation ) ) { |
| 617 | return new MediaTransformError( 'thumbnail_error', 0, 0, |
| 618 | "Error rotating $rotation degrees" ); |
| 619 | } |
| 620 | $result = $im->writeImage( $params['dstPath'] ); |
| 621 | if ( !$result ) { |
| 622 | return new MediaTransformError( 'thumbnail_error', 0, 0, |
| 623 | "Unable to write image to {$params['dstPath']}" ); |
| 624 | } |
| 625 | |
| 626 | return false; |
| 627 | default: |
| 628 | return new MediaTransformError( 'thumbnail_error', 0, 0, |
| 629 | "$scaler rotation not implemented" ); |
| 630 | } |
| 631 | } |
| 632 | } |