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1 <?php 2 /** 3 * WordPress Imagick Image Editor 4 * 5 * @package WordPress 6 * @subpackage Image_Editor 7 */ 8 9 /** 10 * WordPress Image Editor Class for Image Manipulation through Imagick PHP Module 11 * 12 * @since 3.5.0 13 * 14 * @see WP_Image_Editor 15 */ 16 class WP_Image_Editor_Imagick extends WP_Image_Editor { 17 /** 18 * Imagick object. 19 * 20 * @var Imagick 21 */ 22 protected $image; 23 24 public function __destruct() { 25 if ( $this->image instanceof Imagick ) { 26 // We don't need the original in memory anymore. 27 $this->image->clear(); 28 $this->image->destroy(); 29 } 30 } 31 32 /** 33 * Checks to see if current environment supports Imagick. 34 * 35 * We require Imagick 2.2.0 or greater, based on whether the queryFormats() 36 * method can be called statically. 37 * 38 * @since 3.5.0 39 * 40 * @param array $args 41 * @return bool 42 */ 43 public static function test( $args = array() ) { 44 45 // First, test Imagick's extension and classes. 46 if ( ! extension_loaded( 'imagick' ) || ! class_exists( 'Imagick', false ) || ! class_exists( 'ImagickPixel', false ) ) { 47 return false; 48 } 49 50 if ( version_compare( phpversion( 'imagick' ), '2.2.0', '<' ) ) { 51 return false; 52 } 53 54 $required_methods = array( 55 'clear', 56 'destroy', 57 'valid', 58 'getimage', 59 'writeimage', 60 'getimageblob', 61 'getimagegeometry', 62 'getimageformat', 63 'setimageformat', 64 'setimagecompression', 65 'setimagecompressionquality', 66 'setimagepage', 67 'setoption', 68 'scaleimage', 69 'cropimage', 70 'rotateimage', 71 'flipimage', 72 'flopimage', 73 'readimage', 74 ); 75 76 // Now, test for deep requirements within Imagick. 77 if ( ! defined( 'imagick::COMPRESSION_JPEG' ) ) { 78 return false; 79 } 80 81 $class_methods = array_map( 'strtolower', get_class_methods( 'Imagick' ) ); 82 if ( array_diff( $required_methods, $class_methods ) ) { 83 return false; 84 } 85 86 return true; 87 } 88 89 /** 90 * Checks to see if editor supports the mime-type specified. 91 * 92 * @since 3.5.0 93 * 94 * @param string $mime_type 95 * @return bool 96 */ 97 public static function supports_mime_type( $mime_type ) { 98 $imagick_extension = strtoupper( self::get_extension( $mime_type ) ); 99 100 if ( ! $imagick_extension ) { 101 return false; 102 } 103 104 // setIteratorIndex is optional unless mime is an animated format. 105 // Here, we just say no if you are missing it and aren't loading a jpeg. 106 if ( ! method_exists( 'Imagick', 'setIteratorIndex' ) && 'image/jpeg' !== $mime_type ) { 107 return false; 108 } 109 110 try { 111 // phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged 112 return ( (bool) @Imagick::queryFormats( $imagick_extension ) ); 113 } catch ( Exception $e ) { 114 return false; 115 } 116 } 117 118 /** 119 * Loads image from $this->file into new Imagick Object. 120 * 121 * @since 3.5.0 122 * 123 * @return true|WP_Error True if loaded; WP_Error on failure. 124 */ 125 public function load() { 126 if ( $this->image instanceof Imagick ) { 127 return true; 128 } 129 130 if ( ! is_file( $this->file ) && ! preg_match( '|^https?://|', $this->file ) ) { 131 return new WP_Error( 'error_loading_image', __( 'File doesn’t exist?' ), $this->file ); 132 } 133 134 /* 135 * Even though Imagick uses less PHP memory than GD, set higher limit 136 * for users that have low PHP.ini limits. 137 */ 138 wp_raise_memory_limit( 'image' ); 139 140 try { 141 $this->image = new Imagick(); 142 $file_extension = strtolower( pathinfo( $this->file, PATHINFO_EXTENSION ) ); 143 $filename = $this->file; 144 145 if ( 'pdf' === $file_extension ) { 146 $filename = $this->pdf_setup(); 147 } 148 149 // Reading image after Imagick instantiation because `setResolution` 150 // only applies correctly before the image is read. 151 $this->image->readImage( $filename ); 152 153 if ( ! $this->image->valid() ) { 154 return new WP_Error( 'invalid_image', __( 'File is not an image.' ), $this->file ); 155 } 156 157 // Select the first frame to handle animated images properly. 158 if ( is_callable( array( $this->image, 'setIteratorIndex' ) ) ) { 159 $this->image->setIteratorIndex( 0 ); 160 } 161 162 $this->mime_type = $this->get_mime_type( $this->image->getImageFormat() ); 163 } catch ( Exception $e ) { 164 return new WP_Error( 'invalid_image', $e->getMessage(), $this->file ); 165 } 166 167 $updated_size = $this->update_size(); 168 if ( is_wp_error( $updated_size ) ) { 169 return $updated_size; 170 } 171 172 return $this->set_quality(); 173 } 174 175 /** 176 * Sets Image Compression quality on a 1-100% scale. 177 * 178 * @since 3.5.0 179 * 180 * @param int $quality Compression Quality. Range: [1,100] 181 * @return true|WP_Error True if set successfully; WP_Error on failure. 182 */ 183 public function set_quality( $quality = null ) { 184 $quality_result = parent::set_quality( $quality ); 185 if ( is_wp_error( $quality_result ) ) { 186 return $quality_result; 187 } else { 188 $quality = $this->get_quality(); 189 } 190 191 try { 192 if ( 'image/jpeg' === $this->mime_type ) { 193 $this->image->setImageCompressionQuality( $quality ); 194 $this->image->setImageCompression( imagick::COMPRESSION_JPEG ); 195 } else { 196 $this->image->setImageCompressionQuality( $quality ); 197 } 198 } catch ( Exception $e ) { 199 return new WP_Error( 'image_quality_error', $e->getMessage() ); 200 } 201 202 return true; 203 } 204 205 /** 206 * Sets or updates current image size. 207 * 208 * @since 3.5.0 209 * 210 * @param int $width 211 * @param int $height 212 * 213 * @return true|WP_Error 214 */ 215 protected function update_size( $width = null, $height = null ) { 216 $size = null; 217 if ( ! $width || ! $height ) { 218 try { 219 $size = $this->image->getImageGeometry(); 220 } catch ( Exception $e ) { 221 return new WP_Error( 'invalid_image', __( 'Could not read image size.' ), $this->file ); 222 } 223 } 224 225 if ( ! $width ) { 226 $width = $size['width']; 227 } 228 229 if ( ! $height ) { 230 $height = $size['height']; 231 } 232 233 return parent::update_size( $width, $height ); 234 } 235 236 /** 237 * Resizes current image. 238 * 239 * At minimum, either a height or width must be provided. 240 * If one of the two is set to null, the resize will 241 * maintain aspect ratio according to the provided dimension. 242 * 243 * @since 3.5.0 244 * 245 * @param int|null $max_w Image width. 246 * @param int|null $max_h Image height. 247 * @param bool $crop 248 * @return bool|WP_Error 249 */ 250 public function resize( $max_w, $max_h, $crop = false ) { 251 if ( ( $this->size['width'] == $max_w ) && ( $this->size['height'] == $max_h ) ) { 252 return true; 253 } 254 255 $dims = image_resize_dimensions( $this->size['width'], $this->size['height'], $max_w, $max_h, $crop ); 256 if ( ! $dims ) { 257 return new WP_Error( 'error_getting_dimensions', __( 'Could not calculate resized image dimensions' ) ); 258 } 259 260 list( $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h ) = $dims; 261 262 if ( $crop ) { 263 return $this->crop( $src_x, $src_y, $src_w, $src_h, $dst_w, $dst_h ); 264 } 265 266 // Execute the resize. 267 $thumb_result = $this->thumbnail_image( $dst_w, $dst_h ); 268 if ( is_wp_error( $thumb_result ) ) { 269 return $thumb_result; 270 } 271 272 return $this->update_size( $dst_w, $dst_h ); 273 } 274 275 /** 276 * Efficiently resize the current image 277 * 278 * This is a WordPress specific implementation of Imagick::thumbnailImage(), 279 * which resizes an image to given dimensions and removes any associated profiles. 280 * 281 * @since 4.5.0 282 * 283 * @param int $dst_w The destination width. 284 * @param int $dst_h The destination height. 285 * @param string $filter_name Optional. The Imagick filter to use when resizing. Default 'FILTER_TRIANGLE'. 286 * @param bool $strip_meta Optional. Strip all profiles, excluding color profiles, from the image. Default true. 287 * @return bool|WP_Error 288 */ 289 protected function thumbnail_image( $dst_w, $dst_h, $filter_name = 'FILTER_TRIANGLE', $strip_meta = true ) { 290 $allowed_filters = array( 291 'FILTER_POINT', 292 'FILTER_BOX', 293 'FILTER_TRIANGLE', 294 'FILTER_HERMITE', 295 'FILTER_HANNING', 296 'FILTER_HAMMING', 297 'FILTER_BLACKMAN', 298 'FILTER_GAUSSIAN', 299 'FILTER_QUADRATIC', 300 'FILTER_CUBIC', 301 'FILTER_CATROM', 302 'FILTER_MITCHELL', 303 'FILTER_LANCZOS', 304 'FILTER_BESSEL', 305 'FILTER_SINC', 306 ); 307 308 /** 309 * Set the filter value if '$filter_name' name is in our whitelist and the related 310 * Imagick constant is defined or fall back to our default filter. 311 */ 312 if ( in_array( $filter_name, $allowed_filters, true ) && defined( 'Imagick::' . $filter_name ) ) { 313 $filter = constant( 'Imagick::' . $filter_name ); 314 } else { 315 $filter = defined( 'Imagick::FILTER_TRIANGLE' ) ? Imagick::FILTER_TRIANGLE : false; 316 } 317 318 /** 319 * Filters whether to strip metadata from images when they're resized. 320 * 321 * This filter only applies when resizing using the Imagick editor since GD 322 * always strips profiles by default. 323 * 324 * @since 4.5.0 325 * 326 * @param bool $strip_meta Whether to strip image metadata during resizing. Default true. 327 */ 328 if ( apply_filters( 'image_strip_meta', $strip_meta ) ) { 329 $this->strip_meta(); // Fail silently if not supported. 330 } 331 332 try { 333 /* 334 * To be more efficient, resample large images to 5x the destination size before resizing 335 * whenever the output size is less that 1/3 of the original image size (1/3^2 ~= .111), 336 * unless we would be resampling to a scale smaller than 128x128. 337 */ 338 if ( is_callable( array( $this->image, 'sampleImage' ) ) ) { 339 $resize_ratio = ( $dst_w / $this->size['width'] ) * ( $dst_h / $this->size['height'] ); 340 $sample_factor = 5; 341 342 if ( $resize_ratio < .111 && ( $dst_w * $sample_factor > 128 && $dst_h * $sample_factor > 128 ) ) { 343 $this->image->sampleImage( $dst_w * $sample_factor, $dst_h * $sample_factor ); 344 } 345 } 346 347 /* 348 * Use resizeImage() when it's available and a valid filter value is set. 349 * Otherwise, fall back to the scaleImage() method for resizing, which 350 * results in better image quality over resizeImage() with default filter 351 * settings and retains backward compatibility with pre 4.5 functionality. 352 */ 353 if ( is_callable( array( $this->image, 'resizeImage' ) ) && $filter ) { 354 $this->image->setOption( 'filter:support', '2.0' ); 355 $this->image->resizeImage( $dst_w, $dst_h, $filter, 1 ); 356 } else { 357 $this->image->scaleImage( $dst_w, $dst_h ); 358 } 359 360 // Set appropriate quality settings after resizing. 361 if ( 'image/jpeg' === $this->mime_type ) { 362 if ( is_callable( array( $this->image, 'unsharpMaskImage' ) ) ) { 363 $this->image->unsharpMaskImage( 0.25, 0.25, 8, 0.065 ); 364 } 365 366 $this->image->setOption( 'jpeg:fancy-upsampling', 'off' ); 367 } 368 369 if ( 'image/png' === $this->mime_type ) { 370 $this->image->setOption( 'png:compression-filter', '5' ); 371 $this->image->setOption( 'png:compression-level', '9' ); 372 $this->image->setOption( 'png:compression-strategy', '1' ); 373 $this->image->setOption( 'png:exclude-chunk', 'all' ); 374 } 375 376 /* 377 * If alpha channel is not defined, set it opaque. 378 * 379 * Note that Imagick::getImageAlphaChannel() is only available if Imagick 380 * has been compiled against ImageMagick version 6.4.0 or newer. 381 */ 382 if ( is_callable( array( $this->image, 'getImageAlphaChannel' ) ) 383 && is_callable( array( $this->image, 'setImageAlphaChannel' ) ) 384 && defined( 'Imagick::ALPHACHANNEL_UNDEFINED' ) 385 && defined( 'Imagick::ALPHACHANNEL_OPAQUE' ) 386 ) { 387 if ( $this->image->getImageAlphaChannel() === Imagick::ALPHACHANNEL_UNDEFINED ) { 388 $this->image->setImageAlphaChannel( Imagick::ALPHACHANNEL_OPAQUE ); 389 } 390 } 391 392 // Limit the bit depth of resized images to 8 bits per channel. 393 if ( is_callable( array( $this->image, 'getImageDepth' ) ) && is_callable( array( $this->image, 'setImageDepth' ) ) ) { 394 if ( 8 < $this->image->getImageDepth() ) { 395 $this->image->setImageDepth( 8 ); 396 } 397 } 398 399 if ( is_callable( array( $this->image, 'setInterlaceScheme' ) ) && defined( 'Imagick::INTERLACE_NO' ) ) { 400 $this->image->setInterlaceScheme( Imagick::INTERLACE_NO ); 401 } 402 } catch ( Exception $e ) { 403 return new WP_Error( 'image_resize_error', $e->getMessage() ); 404 } 405 } 406 407 /** 408 * Create multiple smaller images from a single source. 409 * 410 * Attempts to create all sub-sizes and returns the meta data at the end. This 411 * may result in the server running out of resources. When it fails there may be few 412 * "orphaned" images left over as the meta data is never returned and saved. 413 * 414 * As of 5.3.0 the preferred way to do this is with `make_subsize()`. It creates 415 * the new images one at a time and allows for the meta data to be saved after 416 * each new image is created. 417 * 418 * @since 3.5.0 419 * 420 * @param array $sizes { 421 * An array of image size data arrays. 422 * 423 * Either a height or width must be provided. 424 * If one of the two is set to null, the resize will 425 * maintain aspect ratio according to the provided dimension. 426 * 427 * @type array $size { 428 * Array of height, width values, and whether to crop. 429 * 430 * @type int $width Image width. Optional if `$height` is specified. 431 * @type int $height Image height. Optional if `$width` is specified. 432 * @type bool $crop Optional. Whether to crop the image. Default false. 433 * } 434 * } 435 * @return array An array of resized images' metadata by size. 436 */ 437 public function multi_resize( $sizes ) { 438 $metadata = array(); 439 440 foreach ( $sizes as $size => $size_data ) { 441 $meta = $this->make_subsize( $size_data ); 442 443 if ( ! is_wp_error( $meta ) ) { 444 $metadata[ $size ] = $meta; 445 } 446 } 447 448 return $metadata; 449 } 450 451 /** 452 * Create an image sub-size and return the image meta data value for it. 453 * 454 * @since 5.3.0 455 * 456 * @param array $size_data { 457 * Array of size data. 458 * 459 * @type int $width The maximum width in pixels. 460 * @type int $height The maximum height in pixels. 461 * @type bool $crop Whether to crop the image to exact dimensions. 462 * } 463 * @return array|WP_Error The image data array for inclusion in the `sizes` array in the image meta, 464 * WP_Error object on error. 465 */ 466 public function make_subsize( $size_data ) { 467 if ( ! isset( $size_data['width'] ) && ! isset( $size_data['height'] ) ) { 468 return new WP_Error( 'image_subsize_create_error', __( 'Cannot resize the image. Both width and height are not set.' ) ); 469 } 470 471 $orig_size = $this->size; 472 $orig_image = $this->image->getImage(); 473 474 if ( ! isset( $size_data['width'] ) ) { 475 $size_data['width'] = null; 476 } 477 478 if ( ! isset( $size_data['height'] ) ) { 479 $size_data['height'] = null; 480 } 481 482 if ( ! isset( $size_data['crop'] ) ) { 483 $size_data['crop'] = false; 484 } 485 486 $resized = $this->resize( $size_data['width'], $size_data['height'], $size_data['crop'] ); 487 488 if ( is_wp_error( $resized ) ) { 489 $saved = $resized; 490 } else { 491 $saved = $this->_save( $this->image ); 492 493 $this->image->clear(); 494 $this->image->destroy(); 495 $this->image = null; 496 } 497 498 $this->size = $orig_size; 499 $this->image = $orig_image; 500 501 if ( ! is_wp_error( $saved ) ) { 502 unset( $saved['path'] ); 503 } 504 505 return $saved; 506 } 507 508 /** 509 * Crops Image. 510 * 511 * @since 3.5.0 512 * 513 * @param int $src_x The start x position to crop from. 514 * @param int $src_y The start y position to crop from. 515 * @param int $src_w The width to crop. 516 * @param int $src_h The height to crop. 517 * @param int $dst_w Optional. The destination width. 518 * @param int $dst_h Optional. The destination height. 519 * @param bool $src_abs Optional. If the source crop points are absolute. 520 * @return bool|WP_Error 521 */ 522 public function crop( $src_x, $src_y, $src_w, $src_h, $dst_w = null, $dst_h = null, $src_abs = false ) { 523 if ( $src_abs ) { 524 $src_w -= $src_x; 525 $src_h -= $src_y; 526 } 527 528 try { 529 $this->image->cropImage( $src_w, $src_h, $src_x, $src_y ); 530 $this->image->setImagePage( $src_w, $src_h, 0, 0 ); 531 532 if ( $dst_w || $dst_h ) { 533 // If destination width/height isn't specified, 534 // use same as width/height from source. 535 if ( ! $dst_w ) { 536 $dst_w = $src_w; 537 } 538 if ( ! $dst_h ) { 539 $dst_h = $src_h; 540 } 541 542 $thumb_result = $this->thumbnail_image( $dst_w, $dst_h ); 543 if ( is_wp_error( $thumb_result ) ) { 544 return $thumb_result; 545 } 546 547 return $this->update_size(); 548 } 549 } catch ( Exception $e ) { 550 return new WP_Error( 'image_crop_error', $e->getMessage() ); 551 } 552 return $this->update_size(); 553 } 554 555 /** 556 * Rotates current image counter-clockwise by $angle. 557 * 558 * @since 3.5.0 559 * 560 * @param float $angle 561 * @return true|WP_Error 562 */ 563 public function rotate( $angle ) { 564 /** 565 * $angle is 360-$angle because Imagick rotates clockwise 566 * (GD rotates counter-clockwise) 567 */ 568 try { 569 $this->image->rotateImage( new ImagickPixel( 'none' ), 360 - $angle ); 570 571 // Normalise EXIF orientation data so that display is consistent across devices. 572 if ( is_callable( array( $this->image, 'setImageOrientation' ) ) && defined( 'Imagick::ORIENTATION_TOPLEFT' ) ) { 573 $this->image->setImageOrientation( Imagick::ORIENTATION_TOPLEFT ); 574 } 575 576 // Since this changes the dimensions of the image, update the size. 577 $result = $this->update_size(); 578 if ( is_wp_error( $result ) ) { 579 return $result; 580 } 581 582 $this->image->setImagePage( $this->size['width'], $this->size['height'], 0, 0 ); 583 } catch ( Exception $e ) { 584 return new WP_Error( 'image_rotate_error', $e->getMessage() ); 585 } 586 return true; 587 } 588 589 /** 590 * Flips current image. 591 * 592 * @since 3.5.0 593 * 594 * @param bool $horz Flip along Horizontal Axis 595 * @param bool $vert Flip along Vertical Axis 596 * @return true|WP_Error 597 */ 598 public function flip( $horz, $vert ) { 599 try { 600 if ( $horz ) { 601 $this->image->flipImage(); 602 } 603 604 if ( $vert ) { 605 $this->image->flopImage(); 606 } 607 608 // Normalise EXIF orientation data so that display is consistent across devices. 609 if ( is_callable( array( $this->image, 'setImageOrientation' ) ) && defined( 'Imagick::ORIENTATION_TOPLEFT' ) ) { 610 $this->image->setImageOrientation( Imagick::ORIENTATION_TOPLEFT ); 611 } 612 } catch ( Exception $e ) { 613 return new WP_Error( 'image_flip_error', $e->getMessage() ); 614 } 615 616 return true; 617 } 618 619 /** 620 * Check if a JPEG image has EXIF Orientation tag and rotate it if needed. 621 * 622 * As ImageMagick copies the EXIF data to the flipped/rotated image, proceed only 623 * if EXIF Orientation can be reset afterwards. 624 * 625 * @since 5.3.0 626 * 627 * @return bool|WP_Error True if the image was rotated. False if no EXIF data or if the image doesn't need rotation. 628 * WP_Error if error while rotating. 629 */ 630 public function maybe_exif_rotate() { 631 if ( is_callable( array( $this->image, 'setImageOrientation' ) ) && defined( 'Imagick::ORIENTATION_TOPLEFT' ) ) { 632 return parent::maybe_exif_rotate(); 633 } else { 634 return new WP_Error( 'write_exif_error', __( 'The image cannot be rotated because the embedded meta data cannot be updated.' ) ); 635 } 636 } 637 638 /** 639 * Saves current image to file. 640 * 641 * @since 3.5.0 642 * 643 * @param string $destfilename 644 * @param string $mime_type 645 * @return array|WP_Error {'path'=>string, 'file'=>string, 'width'=>int, 'height'=>int, 'mime-type'=>string} 646 */ 647 public function save( $destfilename = null, $mime_type = null ) { 648 $saved = $this->_save( $this->image, $destfilename, $mime_type ); 649 650 if ( ! is_wp_error( $saved ) ) { 651 $this->file = $saved['path']; 652 $this->mime_type = $saved['mime-type']; 653 654 try { 655 $this->image->setImageFormat( strtoupper( $this->get_extension( $this->mime_type ) ) ); 656 } catch ( Exception $e ) { 657 return new WP_Error( 'image_save_error', $e->getMessage(), $this->file ); 658 } 659 } 660 661 return $saved; 662 } 663 664 /** 665 * @param Imagick $image 666 * @param string $filename 667 * @param string $mime_type 668 * @return array|WP_Error 669 */ 670 protected function _save( $image, $filename = null, $mime_type = null ) { 671 list( $filename, $extension, $mime_type ) = $this->get_output_format( $filename, $mime_type ); 672 673 if ( ! $filename ) { 674 $filename = $this->generate_filename( null, null, $extension ); 675 } 676 677 try { 678 // Store initial format. 679 $orig_format = $this->image->getImageFormat(); 680 681 $this->image->setImageFormat( strtoupper( $this->get_extension( $mime_type ) ) ); 682 $this->make_image( $filename, array( $image, 'writeImage' ), array( $filename ) ); 683 684 // Reset original format. 685 $this->image->setImageFormat( $orig_format ); 686 } catch ( Exception $e ) { 687 return new WP_Error( 'image_save_error', $e->getMessage(), $filename ); 688 } 689 690 // Set correct file permissions. 691 $stat = stat( dirname( $filename ) ); 692 $perms = $stat['mode'] & 0000666; // Same permissions as parent folder, strip off the executable bits. 693 chmod( $filename, $perms ); 694 695 return array( 696 'path' => $filename, 697 /** This filter is documented in wp-includes/class-wp-image-editor-gd.php */ 698 'file' => wp_basename( apply_filters( 'image_make_intermediate_size', $filename ) ), 699 'width' => $this->size['width'], 700 'height' => $this->size['height'], 701 'mime-type' => $mime_type, 702 ); 703 } 704 705 /** 706 * Streams current image to browser. 707 * 708 * @since 3.5.0 709 * 710 * @param string $mime_type The mime type of the image. 711 * @return bool|WP_Error True on success, WP_Error object on failure. 712 */ 713 public function stream( $mime_type = null ) { 714 list( $filename, $extension, $mime_type ) = $this->get_output_format( null, $mime_type ); 715 716 try { 717 // Temporarily change format for stream. 718 $this->image->setImageFormat( strtoupper( $extension ) ); 719 720 // Output stream of image content. 721 header( "Content-Type: $mime_type" ); 722 print $this->image->getImageBlob(); 723 724 // Reset image to original format. 725 $this->image->setImageFormat( $this->get_extension( $this->mime_type ) ); 726 } catch ( Exception $e ) { 727 return new WP_Error( 'image_stream_error', $e->getMessage() ); 728 } 729 730 return true; 731 } 732 733 /** 734 * Strips all image meta except color profiles from an image. 735 * 736 * @since 4.5.0 737 * 738 * @return true|WP_Error True if stripping metadata was successful. WP_Error object on error. 739 */ 740 protected function strip_meta() { 741 742 if ( ! is_callable( array( $this->image, 'getImageProfiles' ) ) ) { 743 /* translators: %s: ImageMagick method name. */ 744 return new WP_Error( 'image_strip_meta_error', sprintf( __( '%s is required to strip image meta.' ), '<code>Imagick::getImageProfiles()</code>' ) ); 745 } 746 747 if ( ! is_callable( array( $this->image, 'removeImageProfile' ) ) ) { 748 /* translators: %s: ImageMagick method name. */ 749 return new WP_Error( 'image_strip_meta_error', sprintf( __( '%s is required to strip image meta.' ), '<code>Imagick::removeImageProfile()</code>' ) ); 750 } 751 752 /* 753 * Protect a few profiles from being stripped for the following reasons: 754 * 755 * - icc: Color profile information 756 * - icm: Color profile information 757 * - iptc: Copyright data 758 * - exif: Orientation data 759 * - xmp: Rights usage data 760 */ 761 $protected_profiles = array( 762 'icc', 763 'icm', 764 'iptc', 765 'exif', 766 'xmp', 767 ); 768 769 try { 770 // Strip profiles. 771 foreach ( $this->image->getImageProfiles( '*', true ) as $key => $value ) { 772 if ( ! in_array( $key, $protected_profiles, true ) ) { 773 $this->image->removeImageProfile( $key ); 774 } 775 } 776 } catch ( Exception $e ) { 777 return new WP_Error( 'image_strip_meta_error', $e->getMessage() ); 778 } 779 780 return true; 781 } 782 783 /** 784 * Sets up Imagick for PDF processing. 785 * Increases rendering DPI and only loads first page. 786 * 787 * @since 4.7.0 788 * 789 * @return string|WP_Error File to load or WP_Error on failure. 790 */ 791 protected function pdf_setup() { 792 try { 793 // By default, PDFs are rendered in a very low resolution. 794 // We want the thumbnail to be readable, so increase the rendering DPI. 795 $this->image->setResolution( 128, 128 ); 796 797 // When generating thumbnails from cropped PDF pages, Imagemagick uses the uncropped 798 // area (resulting in unnecessary whitespace) unless the following option is set. 799 $this->image->setOption( 'pdf:use-cropbox', true ); 800 801 // Only load the first page. 802 return $this->file . '[0]'; 803 } catch ( Exception $e ) { 804 return new WP_Error( 'pdf_setup_failed', $e->getMessage(), $this->file ); 805 } 806 } 807 808 }
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