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| 1 | <?php |
| 2 | /** |
| 3 | * Copyright © Wikimedia Deutschland, 2009 |
| 4 | * Authors Hallo Welt! Medienwerkstatt GmbH |
| 5 | * Authors Sebastian Ulbricht, Daniel Lynge, Marc Reymann, Markus Glaser |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License along |
| 18 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 19 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 20 | * http://www.gnu.org/copyleft/gpl.html |
| 21 | */ |
| 22 | |
| 23 | namespace MediaWiki\Extension\PagedTiffHandler; |
| 24 | |
| 25 | use File; |
| 26 | use FormatMetadata; |
| 27 | use IContextSource; |
| 28 | use Liuggio\StatsdClient\Factory\StatsdDataFactoryInterface; |
| 29 | use LogicException; |
| 30 | use MapCacheLRU; |
| 31 | use MediaHandlerState; |
| 32 | use MediaTransformError; |
| 33 | use MediaTransformOutput; |
| 34 | use MediaWiki\HookContainer\HookContainer; |
| 35 | use MediaWiki\MediaWikiServices; |
| 36 | use MediaWiki\Shell\CommandFactory; |
| 37 | use MediaWiki\Status\Status; |
| 38 | use MediaWiki\User\Options\UserOptionsLookup; |
| 39 | use Message; |
| 40 | use RequestContext; |
| 41 | use RuntimeException; |
| 42 | use TransformationalImageHandler; |
| 43 | |
| 44 | class PagedTiffHandler extends TransformationalImageHandler { |
| 45 | // TIFF files over 10M are considered expensive to thumbnail |
| 46 | private const EXPENSIVE_SIZE_LIMIT = 10485760; |
| 47 | |
| 48 | /** |
| 49 | * 1.0: Initial |
| 50 | * 1.1: Fixed bugs in imageinfo parser |
| 51 | * 1.2: Photoshop quirks (reverted) |
| 52 | * 1.3: Handing extra IFDs reported by tiffinfo |
| 53 | * 1.4: Allowed page numbering to start from numbers other than 1 |
| 54 | */ |
| 55 | public const TIFF_METADATA_VERSION = '1.4'; |
| 56 | |
| 57 | /** |
| 58 | * Known images cache |
| 59 | * |
| 60 | * @var MapCacheLRU |
| 61 | */ |
| 62 | private $knownImages; |
| 63 | |
| 64 | /** @var CommandFactory */ |
| 65 | private $commandFactory; |
| 66 | |
| 67 | /** @var HookContainer */ |
| 68 | private $hookContainer; |
| 69 | |
| 70 | /** @var UserOptionsLookup */ |
| 71 | private $userOptionsLookup; |
| 72 | |
| 73 | /** @var StatsdDataFactoryInterface */ |
| 74 | private $statsdFactory; |
| 75 | |
| 76 | /** |
| 77 | * Number of images to keep in $knownImages |
| 78 | */ |
| 79 | private const CACHE_SIZE = 5; |
| 80 | |
| 81 | public function __construct() { |
| 82 | $this->knownImages = new MapCacheLRU( self::CACHE_SIZE ); |
| 83 | |
| 84 | $services = MediaWikiServices::getInstance(); |
| 85 | $this->commandFactory = $services->getShellCommandFactory(); |
| 86 | $this->hookContainer = $services->getHookContainer(); |
| 87 | $this->userOptionsLookup = $services->getUserOptionsLookup(); |
| 88 | $this->statsdFactory = $services->getStatsdDataFactory(); |
| 89 | } |
| 90 | |
| 91 | /** |
| 92 | * @return bool |
| 93 | */ |
| 94 | public function isEnabled() { |
| 95 | return true; |
| 96 | } |
| 97 | |
| 98 | /** |
| 99 | * @param File $img |
| 100 | * @return bool |
| 101 | */ |
| 102 | public function mustRender( $img ) { |
| 103 | return true; |
| 104 | } |
| 105 | |
| 106 | /** |
| 107 | * Does the file format support multi-page documents? |
| 108 | * @param File $img |
| 109 | * @return bool |
| 110 | */ |
| 111 | public function isMultiPage( $img ) { |
| 112 | return true; |
| 113 | } |
| 114 | |
| 115 | /** |
| 116 | * Various checks against the uploaded file |
| 117 | * - maximum upload size |
| 118 | * - maximum number of embedded files |
| 119 | * - maximum size of metadata |
| 120 | * - identify-errors |
| 121 | * - identify-warnings |
| 122 | * - check for running-identify-service |
| 123 | * @param string $fileName |
| 124 | * @return Status |
| 125 | */ |
| 126 | public function verifyUpload( $fileName ) { |
| 127 | $status = Status::newGood(); |
| 128 | $meta = $this->getTiffImage( false, $fileName )->retrieveMetaData(); |
| 129 | if ( !$meta ) { |
| 130 | wfDebug( __METHOD__ . ": unable to retrieve metadata" ); |
| 131 | $status->fatal( 'tiff_out_of_service' ); |
| 132 | } else { |
| 133 | $ok = $this->verifyMetaData( $meta, $error ); |
| 134 | |
| 135 | if ( !$ok ) { |
| 136 | $this->getCachedTiffImage( $fileName )->resetMetaData(); |
| 137 | call_user_func_array( [ $status, 'fatal' ], $error ); |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | return $status; |
| 142 | } |
| 143 | |
| 144 | /** |
| 145 | * @param array $meta |
| 146 | * @param array &$error |
| 147 | * @return bool |
| 148 | */ |
| 149 | private function verifyMetaData( $meta, &$error ) { |
| 150 | global $wgTiffMaxEmbedFiles, $wgTiffMaxMetaSize; |
| 151 | |
| 152 | $errors = $this->getMetadataErrors( $meta ); |
| 153 | if ( $errors ) { |
| 154 | $error = [ 'tiff_bad_file', $this->joinMessages( $errors ) ]; |
| 155 | |
| 156 | wfDebug( __METHOD__ . ": {$error[0]} " . |
| 157 | $this->joinMessages( $errors, false ) ); |
| 158 | return false; |
| 159 | } |
| 160 | |
| 161 | if ( $meta['page_count'] <= 0 || empty( $meta['page_data'] ) ) { |
| 162 | $error = [ 'tiff_page_error', $meta['page_count'] ]; |
| 163 | wfDebug( __METHOD__ . ": {$error[0]}" ); |
| 164 | return false; |
| 165 | } |
| 166 | if ( $wgTiffMaxEmbedFiles && $meta['page_count'] > $wgTiffMaxEmbedFiles ) { |
| 167 | $error = [ 'tiff_too_much_embed_files', $meta['page_count'], $wgTiffMaxEmbedFiles ]; |
| 168 | wfDebug( __METHOD__ . ": {$error[0]}" ); |
| 169 | return false; |
| 170 | } |
| 171 | $len = strlen( serialize( $meta ) ); |
| 172 | if ( ( $len + 1 ) > $wgTiffMaxMetaSize ) { |
| 173 | $error = [ 'tiff_too_much_meta', $len, $wgTiffMaxMetaSize ]; |
| 174 | wfDebug( __METHOD__ . ": {$error[0]}" ); |
| 175 | return false; |
| 176 | } |
| 177 | |
| 178 | wfDebug( __METHOD__ . ": metadata is ok" ); |
| 179 | return true; |
| 180 | } |
| 181 | |
| 182 | /** |
| 183 | * Maps MagicWord-IDs to parameters. |
| 184 | * In this case, width, page, and lossy. |
| 185 | * @return array |
| 186 | */ |
| 187 | public function getParamMap() { |
| 188 | return [ |
| 189 | 'img_width' => 'width', |
| 190 | 'img_page' => 'page', |
| 191 | 'img_lossy' => 'lossy', |
| 192 | ]; |
| 193 | } |
| 194 | |
| 195 | /** |
| 196 | * Checks whether parameters are valid and have valid values. |
| 197 | * Check for lossy was added. |
| 198 | * @param string $name |
| 199 | * @param string $value |
| 200 | * @return bool |
| 201 | */ |
| 202 | public function validateParam( $name, $value ) { |
| 203 | if ( in_array( $name, [ 'width', 'height', 'page', 'lossy' ] ) ) { |
| 204 | if ( $name === 'page' && trim( $value ) !== (string)intval( $value ) ) { |
| 205 | // Extra junk on the end of page, probably actually a caption |
| 206 | // e.g. [[File:Foo.tiff|thumb|Page 3 of the document shows foo]] |
| 207 | return false; |
| 208 | } |
| 209 | |
| 210 | if ( $name == 'lossy' ) { |
| 211 | # NOTE: make sure to use === for comparison. in PHP, '' == 0 and 'foo' == 1. |
| 212 | |
| 213 | if ( $value === 1 || $value === 0 || $value === '1' || $value === '0' ) { |
| 214 | return true; |
| 215 | } |
| 216 | |
| 217 | if ( $value === 'true' || $value === 'false' |
| 218 | || $value === 'lossy' || $value === 'lossless' |
| 219 | ) { |
| 220 | return true; |
| 221 | } |
| 222 | |
| 223 | return false; |
| 224 | } elseif ( $value <= 0 || $value > 65535 ) { // ImageMagick overflows for values > 65536 |
| 225 | return false; |
| 226 | } else { |
| 227 | return true; |
| 228 | } |
| 229 | } else { |
| 230 | return false; |
| 231 | } |
| 232 | } |
| 233 | |
| 234 | /** |
| 235 | * Creates parameter string for file name. |
| 236 | * Page number was added. |
| 237 | * @param array $params |
| 238 | * @return string|false |
| 239 | */ |
| 240 | public function makeParamString( $params ) { |
| 241 | if ( |
| 242 | !isset( $params['width'] ) || !isset( $params['lossy'] ) || !isset( $params['page'] ) |
| 243 | ) { |
| 244 | return false; |
| 245 | } |
| 246 | |
| 247 | return "{$params['lossy']}-page{$params['page']}-{$params['width']}px"; |
| 248 | } |
| 249 | |
| 250 | /** |
| 251 | * Parses parameter string into an array. |
| 252 | * @param string $str |
| 253 | * @return array|false |
| 254 | */ |
| 255 | public function parseParamString( $str ) { |
| 256 | if ( preg_match( '/^(\w+)-page(\d+)-(\d+)px$/', $str, $matches ) ) { |
| 257 | return [ 'width' => $matches[3], 'page' => $matches[2], 'lossy' => $matches[1] ]; |
| 258 | } |
| 259 | |
| 260 | return false; |
| 261 | } |
| 262 | |
| 263 | /** |
| 264 | * The function is used to specify which parameters to File::transform() should be |
| 265 | * passed through to thumb.php, in the case where the configuration specifies |
| 266 | * thumb.php is to be used (e.g. $wgThumbnailScriptPath !== false). You should |
| 267 | * pass through the same parameters as in makeParamString(). |
| 268 | * @param array $params |
| 269 | * @return array |
| 270 | */ |
| 271 | protected function getScriptParams( $params ) { |
| 272 | return [ |
| 273 | 'width' => $params['width'], |
| 274 | 'page' => $params['page'], |
| 275 | 'lossy' => $params['lossy'], |
| 276 | ]; |
| 277 | } |
| 278 | |
| 279 | /** |
| 280 | * Prepares param array and sets standard values. |
| 281 | * Adds normalisation for parameter "lossy". |
| 282 | * @param File $image |
| 283 | * @param array &$params |
| 284 | * @return bool |
| 285 | */ |
| 286 | public function normaliseParams( $image, &$params ) { |
| 287 | if ( isset( $params['page'] ) ) { |
| 288 | $params['page'] = $this->adjustPage( $image, $params['page'] ); |
| 289 | } else { |
| 290 | $params['page'] = $this->firstPage( $image ); |
| 291 | } |
| 292 | |
| 293 | if ( isset( $params['lossy'] ) ) { |
| 294 | if ( in_array( $params['lossy'], [ 1, '1', 'true', 'lossy' ] ) ) { |
| 295 | $params['lossy'] = 'lossy'; |
| 296 | } else { |
| 297 | $params['lossy'] = 'lossless'; |
| 298 | } |
| 299 | } else { |
| 300 | $page = $params['page']; |
| 301 | $data = $image->getMetadataArray(); |
| 302 | |
| 303 | if ( !$this->isMetadataError( $data ) |
| 304 | && strtolower( $data['page_data'][$page]['alpha'] ?? '' ) == 'true' |
| 305 | ) { |
| 306 | // If there is an alpha channel, use png. |
| 307 | $params['lossy'] = 'lossless'; |
| 308 | } else { |
| 309 | $params['lossy'] = 'lossy'; |
| 310 | } |
| 311 | } |
| 312 | |
| 313 | return parent::normaliseParams( $image, $params ); |
| 314 | } |
| 315 | |
| 316 | /** |
| 317 | * @param array|false $metadata |
| 318 | * @return bool|string[] a list of errors or an error flag (true = error) |
| 319 | */ |
| 320 | private function getMetadataErrors( $metadata ) { |
| 321 | if ( !$metadata ) { |
| 322 | return true; |
| 323 | } elseif ( !isset( $metadata['errors'] ) ) { |
| 324 | return false; |
| 325 | } |
| 326 | |
| 327 | return $metadata['errors']; |
| 328 | } |
| 329 | |
| 330 | /** |
| 331 | * Is metadata an error condition? |
| 332 | * @param array|false $metadata Metadata to test |
| 333 | * @return bool True if metadata is an error, false if it has normal info |
| 334 | */ |
| 335 | private function isMetadataError( $metadata ) { |
| 336 | $errors = $this->getMetadataErrors( $metadata ); |
| 337 | if ( is_array( $errors ) ) { |
| 338 | return count( $errors ) > 0; |
| 339 | } else { |
| 340 | return $errors; |
| 341 | } |
| 342 | } |
| 343 | |
| 344 | /** |
| 345 | * @param array|string $errors_raw |
| 346 | * @param bool $to_html |
| 347 | * @return bool|string |
| 348 | */ |
| 349 | private function joinMessages( $errors_raw, $to_html = true ) { |
| 350 | if ( is_array( $errors_raw ) ) { |
| 351 | if ( !$errors_raw ) { |
| 352 | return false; |
| 353 | } |
| 354 | |
| 355 | $errors = []; |
| 356 | foreach ( $errors_raw as $error ) { |
| 357 | if ( $error === false || $error === null || $error === 0 || $error === '' ) { |
| 358 | continue; |
| 359 | } |
| 360 | |
| 361 | $error = trim( $error ); |
| 362 | |
| 363 | if ( $error === '' ) { |
| 364 | continue; |
| 365 | } |
| 366 | |
| 367 | if ( $to_html ) { |
| 368 | $error = htmlspecialchars( $error ); |
| 369 | } |
| 370 | |
| 371 | $errors[] = $error; |
| 372 | } |
| 373 | |
| 374 | if ( $to_html ) { |
| 375 | return trim( implode( '<br />', $errors ) ); |
| 376 | } else { |
| 377 | return trim( implode( ";\n", $errors ) ); |
| 378 | } |
| 379 | } |
| 380 | |
| 381 | return $errors_raw; |
| 382 | } |
| 383 | |
| 384 | /** |
| 385 | * What method to use to scale this file |
| 386 | * |
| 387 | * @see TransformationalImageHandler::getScalerType |
| 388 | * @param string $dstPath Path to store thumbnail |
| 389 | * @param bool $checkDstPath Whether to verify destination path exists |
| 390 | * @return callable Transform function to call. |
| 391 | */ |
| 392 | protected function getScalerType( $dstPath, $checkDstPath = true ) { |
| 393 | if ( !$dstPath && $checkDstPath ) { |
| 394 | // We don't have the option of doing client side scaling for this filetype. |
| 395 | throw new RuntimeException( "Cannot create thumbnail, no destination path" ); |
| 396 | } |
| 397 | |
| 398 | return [ $this, 'transformIM' ]; |
| 399 | } |
| 400 | |
| 401 | /** |
| 402 | * Actually scale the file (using ImageMagick). |
| 403 | * |
| 404 | * @param File $file File object |
| 405 | * @param array $scalerParams Scaling options (see TransformationalImageHandler::doTransform) |
| 406 | * @return bool|MediaTransformError False on success, an instance of MediaTransformError |
| 407 | * otherwise. |
| 408 | * @note Success is noted by $scalerParams['dstPath'] no longer being a 0 byte file. |
| 409 | */ |
| 410 | protected function transformIM( $file, $scalerParams ) { |
| 411 | global $wgImageMagickConvertCommand, $wgMaxImageArea; |
| 412 | |
| 413 | $meta = $file->getMetadataArray(); |
| 414 | |
| 415 | $errors = $this->getMetadataErrors( $meta ); |
| 416 | |
| 417 | if ( $errors ) { |
| 418 | $errors = $this->joinMessages( $errors ); |
| 419 | if ( is_string( $errors ) ) { |
| 420 | // TODO: original error as param // TESTME |
| 421 | return $this->doThumbError( $scalerParams, 'tiff_bad_file' ); |
| 422 | } else { |
| 423 | return $this->doThumbError( $scalerParams, 'tiff_no_metadata' ); |
| 424 | } |
| 425 | } |
| 426 | |
| 427 | if ( !$this->verifyMetaData( $meta, $error ) ) { |
| 428 | return $this->doThumbError( $scalerParams, $error ); |
| 429 | } |
| 430 | if ( !wfMkdirParents( dirname( $scalerParams['dstPath'] ), null, __METHOD__ ) ) { |
| 431 | return $this->doThumbError( $scalerParams, 'thumbnail_dest_directory' ); |
| 432 | } |
| 433 | |
| 434 | // Get params and force width, height and page to be integers |
| 435 | $width = intval( $scalerParams['physicalWidth'] ); |
| 436 | $height = intval( $scalerParams['physicalHeight'] ); |
| 437 | $page = intval( $scalerParams['page'] ); |
| 438 | $srcPath = $this->escapeMagickInput( $scalerParams['srcPath'], (string)( $page - 1 ) ); |
| 439 | $dstPath = $this->escapeMagickOutput( $scalerParams['dstPath'] ); |
| 440 | |
| 441 | if ( $wgMaxImageArea |
| 442 | && isset( $meta['page_data'][$page]['pixels'] ) |
| 443 | && $meta['page_data'][$page]['pixels'] > $wgMaxImageArea |
| 444 | ) { |
| 445 | return $this->doThumbError( $scalerParams, 'tiff_sourcefile_too_large' ); |
| 446 | } |
| 447 | |
| 448 | $command = $this->commandFactory->create() |
| 449 | ->params( |
| 450 | $wgImageMagickConvertCommand, |
| 451 | $srcPath, |
| 452 | '-depth', '8', |
| 453 | '-resize', $width, |
| 454 | $dstPath |
| 455 | ) |
| 456 | ->includeStderr(); |
| 457 | |
| 458 | $result = $command->execute(); |
| 459 | $exitCode = $result->getExitCode(); |
| 460 | if ( $exitCode !== 0 ) { |
| 461 | $err = $result->getStdout(); |
| 462 | $cmd = $command->getCommandString(); |
| 463 | wfDebugLog( |
| 464 | 'thumbnail', |
| 465 | "thumbnail failed on " . wfHostname() . "; error $exitCode \"$err\" from \"$cmd\"" |
| 466 | ); |
| 467 | return $this->getMediaTransformError( $scalerParams, $err ); |
| 468 | } else { |
| 469 | return false; /* no error */ |
| 470 | } |
| 471 | } |
| 472 | |
| 473 | /** |
| 474 | * Get the thumbnail extension and MIME type for a given source MIME type |
| 475 | * @param string $ext |
| 476 | * @param string $mime |
| 477 | * @param array|null $params |
| 478 | * @return array thumbnail extension and MIME type |
| 479 | */ |
| 480 | public function getThumbType( $ext, $mime, $params = null ) { |
| 481 | // Make sure the file is actually a tiff image |
| 482 | $tiffImageThumbType = parent::getThumbType( $ext, $mime, $params ); |
| 483 | if ( $tiffImageThumbType[1] !== 'image/tiff' ) { |
| 484 | // We have some other file pretending to be a tiff image. |
| 485 | return $tiffImageThumbType; |
| 486 | } |
| 487 | |
| 488 | if ( isset( $params['lossy'] ) && $params['lossy'] == 'lossy' ) { |
| 489 | return [ 'jpg', 'image/jpeg' ]; |
| 490 | } else { |
| 491 | return [ 'png', 'image/png' ]; |
| 492 | } |
| 493 | } |
| 494 | |
| 495 | /** |
| 496 | * Returns the number of available pages/embedded files |
| 497 | * @param File $image |
| 498 | * @return int |
| 499 | */ |
| 500 | public function pageCount( File $image ) { |
| 501 | $data = $image->getMetadataArray(); |
| 502 | if ( $this->isMetadataError( $data ) ) { |
| 503 | return 1; |
| 504 | } |
| 505 | |
| 506 | return intval( $data['page_count'] ); |
| 507 | } |
| 508 | |
| 509 | /** |
| 510 | * Returns the number of the first page in the file |
| 511 | * @param File $image |
| 512 | * @return int |
| 513 | */ |
| 514 | private function firstPage( $image ) { |
| 515 | $data = $image->getMetadataArray(); |
| 516 | if ( $this->isMetadataError( $data ) ) { |
| 517 | return 1; |
| 518 | } |
| 519 | return intval( $data['first_page'] ); |
| 520 | } |
| 521 | |
| 522 | /** |
| 523 | * Returns the number of the last page in the file |
| 524 | * @param File $image |
| 525 | * @return int |
| 526 | */ |
| 527 | private function lastPage( $image ) { |
| 528 | $data = $image->getMetadataArray(); |
| 529 | if ( $this->isMetadataError( $data ) ) { |
| 530 | return 1; |
| 531 | } |
| 532 | return intval( $data['last_page'] ); |
| 533 | } |
| 534 | |
| 535 | /** |
| 536 | * Returns a page number within range. |
| 537 | * @param File $image |
| 538 | * @param int|string $page |
| 539 | * @return int |
| 540 | */ |
| 541 | private function adjustPage( $image, $page ) { |
| 542 | $page = intval( $page ); |
| 543 | |
| 544 | if ( !$page || $page < $this->firstPage( $image ) ) { |
| 545 | $page = $this->firstPage( $image ); |
| 546 | } |
| 547 | |
| 548 | if ( $page > $this->lastPage( $image ) ) { |
| 549 | $page = $this->lastPage( $image ); |
| 550 | } |
| 551 | |
| 552 | return $page; |
| 553 | } |
| 554 | |
| 555 | /** |
| 556 | * Returns a new error message. |
| 557 | * @param array $params |
| 558 | * @param string|array $msg |
| 559 | * @return MediaTransformError |
| 560 | */ |
| 561 | protected function doThumbError( $params, $msg ) { |
| 562 | global $wgThumbLimits; |
| 563 | |
| 564 | $errorParams = []; |
| 565 | if ( empty( $params['width'] ) ) { |
| 566 | $user = RequestContext::getMain()->getUser(); |
| 567 | // no usable width/height in the parameter array |
| 568 | // only happens if we don't have image meta-data, and no |
| 569 | // size was specified by the user. |
| 570 | // we need to pick *some* size, and the preferred |
| 571 | // thumbnail size seems sane. |
| 572 | $sz = $this->userOptionsLookup->getOption( $user, 'thumbsize' ); |
| 573 | $errorParams['clientWidth'] = $wgThumbLimits[ $sz ]; |
| 574 | // we don't have a height or aspect ratio. make it square. |
| 575 | $errorParams['clientHeight'] = $wgThumbLimits[ $sz ]; |
| 576 | } else { |
| 577 | $errorParams['clientWidth'] = intval( $params['width'] ); |
| 578 | |
| 579 | if ( !empty( $params['height'] ) ) { |
| 580 | $errorParams['clientHeight'] = intval( $params['height'] ); |
| 581 | } else { |
| 582 | // we don't have a height or aspect ratio. make it square. |
| 583 | $errorParams['clientHeight'] = $errorParams['clientWidth']; |
| 584 | } |
| 585 | } |
| 586 | |
| 587 | return $this->getMediaTransformError( $errorParams, Message::newFromSpecifier( $msg )->text() ); |
| 588 | } |
| 589 | |
| 590 | /** |
| 591 | * @param MediaHandlerState $state |
| 592 | * @param string $path |
| 593 | * @return array |
| 594 | */ |
| 595 | public function getSizeAndMetadata( $state, $path ) { |
| 596 | $metadata = $state->getHandlerState( 'TiffMetaArray' ); |
| 597 | if ( !$metadata ) { |
| 598 | $metadata = $this->getTiffImage( $state, $path )->retrieveMetaData(); |
| 599 | $state->setHandlerState( 'TiffMetaArray', $metadata ); |
| 600 | } |
| 601 | |
| 602 | $gis = getimagesize( $path ); |
| 603 | if ( $gis ) { |
| 604 | [ $width, $height ] = $gis; |
| 605 | } else { |
| 606 | $width = 0; |
| 607 | $height = 0; |
| 608 | } |
| 609 | |
| 610 | return [ |
| 611 | 'width' => $width, |
| 612 | 'height' => $height, |
| 613 | 'metadata' => $metadata |
| 614 | ]; |
| 615 | } |
| 616 | |
| 617 | /** |
| 618 | * Check if the metadata string is valid for this handler. |
| 619 | * If it returns false, Image will reload the metadata from the file and update the database |
| 620 | * @param File $image |
| 621 | * @return bool |
| 622 | */ |
| 623 | public function isFileMetadataValid( $image ) { |
| 624 | $metadata = $image->getMetadataArray(); |
| 625 | if ( isset( $metadata['errors'] ) ) { |
| 626 | // In the case of a broken file, we do not want to reload the |
| 627 | // metadata on every request. |
| 628 | return self::METADATA_GOOD; |
| 629 | } |
| 630 | |
| 631 | if ( !isset( $metadata['TIFF_METADATA_VERSION'] ) |
| 632 | || $metadata['TIFF_METADATA_VERSION'] != self::TIFF_METADATA_VERSION |
| 633 | ) { |
| 634 | return self::METADATA_BAD; |
| 635 | } |
| 636 | |
| 637 | return self::METADATA_GOOD; |
| 638 | } |
| 639 | |
| 640 | /** |
| 641 | * Get an array structure that looks like this: |
| 642 | * |
| 643 | * [ |
| 644 | * 'visible' => [ |
| 645 | * 'Human-readable name' => 'Human readable value', |
| 646 | * ... |
| 647 | * ], |
| 648 | * 'collapsed' => [ |
| 649 | * 'Human-readable name' => 'Human readable value', |
| 650 | * ... |
| 651 | * ] |
| 652 | * ] |
| 653 | * The UI will format this into a table where the visible fields are always |
| 654 | * visible, and the collapsed fields are optionally visible. |
| 655 | * |
| 656 | * The function should return false if there is no metadata to display. |
| 657 | * |
| 658 | * @param File $image |
| 659 | * @param bool|IContextSource $context Context to use (optional) |
| 660 | * @return array|bool |
| 661 | */ |
| 662 | public function formatMetadata( $image, $context = false ) { |
| 663 | $result = [ |
| 664 | 'visible' => [], |
| 665 | 'collapsed' => [] |
| 666 | ]; |
| 667 | $metadata = $image->getMetadata(); |
| 668 | if ( !$metadata ) { |
| 669 | return false; |
| 670 | } |
| 671 | $exif = unserialize( $metadata ); |
| 672 | if ( !isset( $exif['exif'] ) || !$exif['exif'] ) { |
| 673 | return false; |
| 674 | } |
| 675 | $exif = $exif['exif']; |
| 676 | unset( $exif['MEDIAWIKI_EXIF_VERSION'] ); |
| 677 | $formatted = FormatMetadata::getFormattedData( $exif, $context ); |
| 678 | |
| 679 | // Sort fields into visible and collapsed |
| 680 | $visibleFields = $this->visibleMetadataFields(); |
| 681 | foreach ( $formatted as $name => $value ) { |
| 682 | $tag = strtolower( $name ); |
| 683 | $this->addMeta( $result, |
| 684 | in_array( $tag, $visibleFields ) ? 'visible' : 'collapsed', |
| 685 | 'exif', |
| 686 | $tag, |
| 687 | $value |
| 688 | ); |
| 689 | } |
| 690 | $meta = unserialize( $metadata ); |
| 691 | $errors_raw = $this->getMetadataErrors( $meta ); |
| 692 | if ( $errors_raw ) { |
| 693 | $errors = $this->joinMessages( $errors_raw ); |
| 694 | $this->addMeta( $result, |
| 695 | 'collapsed', |
| 696 | 'metadata', |
| 697 | 'error', |
| 698 | $errors |
| 699 | ); |
| 700 | // XXX: need translation for <metadata-error> |
| 701 | } |
| 702 | if ( !empty( $meta['warnings'] ) ) { |
| 703 | $warnings = $this->joinMessages( $meta['warnings'] ); |
| 704 | $this->addMeta( $result, |
| 705 | 'collapsed', |
| 706 | 'metadata', |
| 707 | 'warning', |
| 708 | $warnings |
| 709 | ); |
| 710 | // XXX: need translation for <metadata-warning> |
| 711 | } |
| 712 | return $result; |
| 713 | } |
| 714 | |
| 715 | /** |
| 716 | * Returns a PagedTiffImage or creates a new one if it doesn't exist. |
| 717 | * @param MediaHandlerState|false $state The image object, or false if there isn't one |
| 718 | * @param string $path path to the image? |
| 719 | * @return PagedTiffImage |
| 720 | */ |
| 721 | private function getTiffImage( $state, $path ) { |
| 722 | if ( !$state ) { |
| 723 | return $this->getCachedTiffImage( $path ); |
| 724 | } |
| 725 | |
| 726 | // If there is an Image object, we check whether there's already a TiffImage |
| 727 | // instance in there; if not, a new instance is created and stored in the Image object |
| 728 | $tiffImage = $state->getHandlerState( 'TiffImage' ); |
| 729 | if ( !$tiffImage ) { |
| 730 | $tiffImage = $this->getCachedTiffImage( $path ); |
| 731 | $state->setHandlerState( 'TiffImage', $tiffImage ); |
| 732 | } |
| 733 | |
| 734 | return $tiffImage; |
| 735 | } |
| 736 | |
| 737 | /** |
| 738 | * Gets a PagedTiffImage from the cache, or creates one |
| 739 | * @param string $path path to the image |
| 740 | * @return PagedTiffImage |
| 741 | */ |
| 742 | private function getCachedTiffImage( $path ) { |
| 743 | $image = $this->knownImages->get( $path ); |
| 744 | if ( $image === null ) { |
| 745 | $image = new PagedTiffImage( $this->commandFactory, $this->statsdFactory, $path ); |
| 746 | $this->knownImages->set( $path, $image ); |
| 747 | } |
| 748 | return $image; |
| 749 | } |
| 750 | |
| 751 | /** |
| 752 | * Get an associative array of page dimensions |
| 753 | * Currently "width" and "height" are understood, but this might be |
| 754 | * expanded in the future. |
| 755 | * @param File $image |
| 756 | * @param int $page |
| 757 | * @return int|false Returns false if unknown or if the document is not multi-page. |
| 758 | */ |
| 759 | public function getPageDimensions( File $image, $page ) { |
| 760 | // makeImageLink (Linker.php) sets $page to false if no page parameter |
| 761 | // is set in wiki code |
| 762 | $page = $this->adjustPage( $image, $page ); |
| 763 | $data = $image->getMetadataArray(); |
| 764 | return PagedTiffImage::getPageSize( $data, $page ); |
| 765 | } |
| 766 | |
| 767 | public function isExpensiveToThumbnail( $file ) { |
| 768 | return $file->getSize() > self::EXPENSIVE_SIZE_LIMIT; |
| 769 | } |
| 770 | |
| 771 | /** |
| 772 | * What source thumbnail to use. |
| 773 | * |
| 774 | * This does not use MW's builtin bucket system, as it tries to take |
| 775 | * advantage of the fact that VIPS can scale integer shrink factors |
| 776 | * much more efficiently than non-integral scaling factors. |
| 777 | * |
| 778 | * @param File $file |
| 779 | * @param array $params Parameters to transform file with. |
| 780 | * @return array Array with keys path, width and height |
| 781 | */ |
| 782 | protected function getThumbnailSource( $file, $params ) { |
| 783 | /** @var MediaTransformOutput */ |
| 784 | $mto = $this->getIntermediaryStep( $file, $params ); |
| 785 | if ( $mto && !$mto->isError() ) { |
| 786 | return [ |
| 787 | 'path' => $mto->getLocalCopyPath(), |
| 788 | 'width' => $mto->getWidth(), |
| 789 | 'height' => $mto->getHeight(), |
| 790 | // The path to the temporary file may be deleted when last |
| 791 | // instance of the MediaTransformOutput is garbage collected, |
| 792 | // so keep a reference around. |
| 793 | 'mto' => $mto |
| 794 | ]; |
| 795 | } else { |
| 796 | return parent::getThumbnailSource( $file, $params ); |
| 797 | } |
| 798 | } |
| 799 | |
| 800 | /** |
| 801 | * Get an intermediary sized thumb to do further rendering on |
| 802 | * |
| 803 | * Tiff files can be huge. This method gets a large thumbnail |
| 804 | * to further scale things down. Size is chosen to be |
| 805 | * efficient to scale in vips for those who use VipsScaler |
| 806 | * |
| 807 | * @param File $file |
| 808 | * @param array $params Scaling parameters for original thumbnail |
| 809 | * @return MediaTransformOutput|MediaTransformError|bool false if no in between step needed, |
| 810 | * MediaTransformError on error. False if the doTransform method returns false |
| 811 | * MediaTransformOutput on success. |
| 812 | */ |
| 813 | private function getIntermediaryStep( $file, $params ) { |
| 814 | global $wgTiffIntermediaryScaleStep, $wgThumbnailMinimumBucketDistance; |
| 815 | |
| 816 | $page = intval( $params['page'] ); |
| 817 | $page = $this->adjustPage( $file, $page ); |
| 818 | $srcWidth = $file->getWidth( $page ); |
| 819 | $srcHeight = $file->getHeight( $page ); |
| 820 | |
| 821 | if ( $srcWidth <= $wgTiffIntermediaryScaleStep ) { |
| 822 | // Image is already smaller than intermediary step or at that step |
| 823 | return false; |
| 824 | } |
| 825 | |
| 826 | $widthOfFinalThumb = $params['physicalWidth']; |
| 827 | |
| 828 | // Try and get a width that's easy for VipsScaler to work with |
| 829 | // i.e. Is an integer shrink factor. |
| 830 | $rx = floor( $srcWidth / ( $wgTiffIntermediaryScaleStep + 0.125 ) ); |
| 831 | $intermediaryWidth = intval( floor( $srcWidth / $rx ) ); |
| 832 | $intermediaryHeight = intval( floor( $srcHeight / $rx ) ); |
| 833 | |
| 834 | // We need both the vertical and horizontal shrink factors to be |
| 835 | // integers, and at the same time make sure that both vips and mediawiki |
| 836 | // have the same height for a given width (MediaWiki makes the assumption |
| 837 | // that the height of an image functionally depends on its width) |
| 838 | for ( ; $rx >= 2; $rx-- ) { |
| 839 | $intermediaryWidth = intval( floor( $srcWidth / $rx ) ); |
| 840 | $intermediaryHeight = intval( floor( $srcHeight / $rx ) ); |
| 841 | if ( $intermediaryHeight == |
| 842 | File::scaleHeight( $srcWidth, $srcHeight, $intermediaryWidth ) |
| 843 | ) { |
| 844 | break; |
| 845 | } |
| 846 | } |
| 847 | |
| 848 | if ( |
| 849 | $intermediaryWidth <= $widthOfFinalThumb + $wgThumbnailMinimumBucketDistance || $rx < 2 |
| 850 | ) { |
| 851 | // Need to scale the original full sized thumb |
| 852 | return false; |
| 853 | } |
| 854 | |
| 855 | static $isInThisFunction; |
| 856 | |
| 857 | if ( $isInThisFunction ) { |
| 858 | // Sanity check, should never be reached |
| 859 | throw new LogicException( "Loop detected in " . __METHOD__ ); |
| 860 | } |
| 861 | $isInThisFunction = true; |
| 862 | |
| 863 | $newParams = [ |
| 864 | 'width' => $intermediaryWidth, |
| 865 | 'page' => $page, |
| 866 | // Render a png, to avoid loss of quality when doing multi-step |
| 867 | 'lossy' => 'lossless' |
| 868 | ]; |
| 869 | |
| 870 | // RENDER_NOW causes rendering in this process if |
| 871 | // thumb doesn't exist, but unlike RENDER_FORCE, will return |
| 872 | // a cached thumb if available. |
| 873 | $mto = $file->transform( $newParams, File::RENDER_NOW ); |
| 874 | |
| 875 | $isInThisFunction = false; |
| 876 | return $mto; |
| 877 | } |
| 878 | } |