Adding upstream version 6.4.3+dfsg1.upstream/6.4.3+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1046 insertions, 0 deletions

diff --git a/wp-includes/class-wp-image-editor-imagick.php b/wp-includes/class-wp-image-editor-imagick.php
new file mode 100644
index 0000000..03fe0bc
--- /dev/null
+++ b/wp-includes/class-wp-image-editor-imagick.php
@@ -0,0 +1,1046 @@
+<?php
+/**
+ * WordPress Imagick Image Editor
+ *
+ * @package WordPress
+ * @subpackage Image_Editor
+ */
+
+/**
+ * WordPress Image Editor Class for Image Manipulation through Imagick PHP Module
+ *
+ * @since 3.5.0
+ *
+ * @see WP_Image_Editor
+ */
+class WP_Image_Editor_Imagick extends WP_Image_Editor {
+	/**
+	 * Imagick object.
+	 *
+	 * @var Imagick
+	 */
+	protected $image;
+
+	public function __destruct() {
+		if ( $this->image instanceof Imagick ) {
+			// We don't need the original in memory anymore.
+			$this->image->clear();
+			$this->image->destroy();
+		}
+	}
+
+	/**
+	 * Checks to see if current environment supports Imagick.
+	 *
+	 * We require Imagick 2.2.0 or greater, based on whether the queryFormats()
+	 * method can be called statically.
+	 *
+	 * @since 3.5.0
+	 *
+	 * @param array $args
+	 * @return bool
+	 */
+	public static function test( $args = array() ) {
+
+		// First, test Imagick's extension and classes.
+		if ( ! extension_loaded( 'imagick' ) || ! class_exists( 'Imagick', false ) || ! class_exists( 'ImagickPixel', false ) ) {
+			return false;
+		}
+
+		if ( version_compare( phpversion( 'imagick' ), '2.2.0', '<' ) ) {
+			return false;
+		}
+
+		$required_methods = array(
+			'clear',
+			'destroy',
+			'valid',
+			'getimage',
+			'writeimage',
+			'getimageblob',
+			'getimagegeometry',
+			'getimageformat',
+			'setimageformat',
+			'setimagecompression',
+			'setimagecompressionquality',
+			'setimagepage',
+			'setoption',
+			'scaleimage',
+			'cropimage',
+			'rotateimage',
+			'flipimage',
+			'flopimage',
+			'readimage',
+			'readimageblob',
+		);
+
+		// Now, test for deep requirements within Imagick.
+		if ( ! defined( 'imagick::COMPRESSION_JPEG' ) ) {
+			return false;
+		}
+
+		$class_methods = array_map( 'strtolower', get_class_methods( 'Imagick' ) );
+		if ( array_diff( $required_methods, $class_methods ) ) {
+			return false;
+		}
+
+		return true;
+	}
+
+	/**
+	 * Checks to see if editor supports the mime-type specified.
+	 *
+	 * @since 3.5.0
+	 *
+	 * @param string $mime_type
+	 * @return bool
+	 */
+	public static function supports_mime_type( $mime_type ) {
+		$imagick_extension = strtoupper( self::get_extension( $mime_type ) );
+
+		if ( ! $imagick_extension ) {
+			return false;
+		}
+
+		/*
+		 * setIteratorIndex is optional unless mime is an animated format.
+		 * Here, we just say no if you are missing it and aren't loading a jpeg.
+		 */
+		if ( ! method_exists( 'Imagick', 'setIteratorIndex' ) && 'image/jpeg' !== $mime_type ) {
+				return false;
+		}
+
+		try {
+			// phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged
+			return ( (bool) @Imagick::queryFormats( $imagick_extension ) );
+		} catch ( Exception $e ) {
+			return false;
+		}
+	}
+
+	/**
+	 * Loads image from $this->file into new Imagick Object.
+	 *
+	 * @since 3.5.0
+	 *
+	 * @return true|WP_Error True if loaded; WP_Error on failure.
+	 */
+	public function load() {
+		if ( $this->image instanceof Imagick ) {
+			return true;
+		}
+
+		if ( ! is_file( $this->file ) && ! wp_is_stream( $this->file ) ) {
+			return new WP_Error( 'error_loading_image', __( 'File does not exist?' ), $this->file );
+		}
+
+		/*
+		 * Even though Imagick uses less PHP memory than GD, set higher limit
+		 * for users that have low PHP.ini limits.
+		 */
+		wp_raise_memory_limit( 'image' );
+
+		try {
+			$this->image    = new Imagick();
+			$file_extension = strtolower( pathinfo( $this->file, PATHINFO_EXTENSION ) );
+
+			if ( 'pdf' === $file_extension ) {
+				$pdf_loaded = $this->pdf_load_source();
+
+				if ( is_wp_error( $pdf_loaded ) ) {
+					return $pdf_loaded;
+				}
+			} else {
+				if ( wp_is_stream( $this->file ) ) {
+					// Due to reports of issues with streams with `Imagick::readImageFile()`, uses `Imagick::readImageBlob()` instead.
+					$this->image->readImageBlob( file_get_contents( $this->file ), $this->file );
+				} else {
+					$this->image->readImage( $this->file );
+				}
+			}
+
+			if ( ! $this->image->valid() ) {
+				return new WP_Error( 'invalid_image', __( 'File is not an image.' ), $this->file );
+			}
+
+			// Select the first frame to handle animated images properly.
+			if ( is_callable( array( $this->image, 'setIteratorIndex' ) ) ) {
+				$this->image->setIteratorIndex( 0 );
+			}
+
+			if ( 'pdf' === $file_extension ) {
+				$this->remove_pdf_alpha_channel();
+			}
+
+			$this->mime_type = $this->get_mime_type( $this->image->getImageFormat() );
+		} catch ( Exception $e ) {
+			return new WP_Error( 'invalid_image', $e->getMessage(), $this->file );
+		}
+
+		$updated_size = $this->update_size();
+
+		if ( is_wp_error( $updated_size ) ) {
+			return $updated_size;
+		}
+
+		return $this->set_quality();
+	}
+
+	/**
+	 * Sets Image Compression quality on a 1-100% scale.
+	 *
+	 * @since 3.5.0
+	 *
+	 * @param int $quality Compression Quality. Range: [1,100]
+	 * @return true|WP_Error True if set successfully; WP_Error on failure.
+	 */
+	public function set_quality( $quality = null ) {
+		$quality_result = parent::set_quality( $quality );
+		if ( is_wp_error( $quality_result ) ) {
+			return $quality_result;
+		} else {
+			$quality = $this->get_quality();
+		}
+
+		try {
+			switch ( $this->mime_type ) {
+				case 'image/jpeg':
+					$this->image->setImageCompressionQuality( $quality );
+					$this->image->setImageCompression( imagick::COMPRESSION_JPEG );
+					break;
+				case 'image/webp':
+					$webp_info = wp_get_webp_info( $this->file );
+
+					if ( 'lossless' === $webp_info['type'] ) {
+						// Use WebP lossless settings.
+						$this->image->setImageCompressionQuality( 100 );
+						$this->image->setOption( 'webp:lossless', 'true' );
+					} else {
+						$this->image->setImageCompressionQuality( $quality );
+					}
+					break;
+				default:
+					$this->image->setImageCompressionQuality( $quality );
+			}
+		} catch ( Exception $e ) {
+			return new WP_Error( 'image_quality_error', $e->getMessage() );
+		}
+		return true;
+	}
+
+
+	/**
+	 * Sets or updates current image size.
+	 *
+	 * @since 3.5.0
+	 *
+	 * @param int $width
+	 * @param int $height
+	 * @return true|WP_Error
+	 */
+	protected function update_size( $width = null, $height = null ) {
+		$size = null;
+		if ( ! $width || ! $height ) {
+			try {
+				$size = $this->image->getImageGeometry();
+			} catch ( Exception $e ) {
+				return new WP_Error( 'invalid_image', __( 'Could not read image size.' ), $this->file );
+			}
+		}
+
+		if ( ! $width ) {
+			$width = $size['width'];
+		}
+
+		if ( ! $height ) {
+			$height = $size['height'];
+		}
+
+		return parent::update_size( $width, $height );
+	}
+
+	/**
+	 * Sets Imagick time limit.
+	 *
+	 * Depending on configuration, Imagick processing may take time.
+	 *
+	 * Multiple problems exist if PHP times out before ImageMagick completed:
+	 * 1. Temporary files aren't cleaned by ImageMagick garbage collection.
+	 * 2. No clear error is provided.
+	 * 3. The cause of such timeout can be hard to pinpoint.
+	 *
+	 * This function, which is expected to be run before heavy image routines, resolves
+	 * point 1 above by aligning Imagick's timeout with PHP's timeout, assuming it is set.
+	 *
+	 * However seems it introduces more problems than it fixes,
+	 * see https://core.trac.wordpress.org/ticket/58202.
+	 *
+	 * Note:
+	 *  - Imagick resource exhaustion does not issue catchable exceptions (yet).
+	 *    See https://github.com/Imagick/imagick/issues/333.
+	 *  - The resource limit is not saved/restored. It applies to subsequent
+	 *    image operations within the time of the HTTP request.
+	 *
+	 * @since 6.2.0
+	 * @since 6.3.0 This method was deprecated.
+	 *
+	 * @return int|null The new limit on success, null on failure.
+	 */
+	public static function set_imagick_time_limit() {
+		_deprecated_function( __METHOD__, '6.3.0' );
+
+		if ( ! defined( 'Imagick::RESOURCETYPE_TIME' ) ) {
+			return null;
+		}
+
+		// Returns PHP_FLOAT_MAX if unset.
+		$imagick_timeout = Imagick::getResourceLimit( Imagick::RESOURCETYPE_TIME );
+
+		// Convert to an integer, keeping in mind that: 0 === (int) PHP_FLOAT_MAX.
+		$imagick_timeout = $imagick_timeout > PHP_INT_MAX ? PHP_INT_MAX : (int) $imagick_timeout;
+
+		$php_timeout = (int) ini_get( 'max_execution_time' );
+
+		if ( $php_timeout > 1 && $php_timeout < $imagick_timeout ) {
+			$limit = (float) 0.8 * $php_timeout;
+			Imagick::setResourceLimit( Imagick::RESOURCETYPE_TIME, $limit );
+
+			return $limit;
+		}
+	}
+
+	/**
+	 * Resizes current image.
+	 *
+	 * At minimum, either a height or width must be provided.
+	 * If one of the two is set to null, the resize will
+	 * maintain aspect ratio according to the provided dimension.
+	 *
+	 * @since 3.5.0
+	 *
+	 * @param int|null   $max_w Image width.
+	 * @param int|null   $max_h Image height.
+	 * @param bool|array $crop  {
+	 *     Optional. Image cropping behavior. If false, the image will be scaled (default).
+	 *     If true, image will be cropped to the specified dimensions using center positions.
+	 *     If an array, the image will be cropped using the array to specify the crop location:
+	 *
+	 *     @type string $0 The x crop position. Accepts 'left' 'center', or 'right'.
+	 *     @type string $1 The y crop position. Accepts 'top', 'center', or 'bottom'.
+	 * }
+	 * @return true|WP_Error
+	 */
+	public function resize( $max_w, $max_h, $crop = false ) {
+		if ( ( $this->size['width'] == $max_w ) && ( $this->size['height'] == $max_h ) ) {
+			return true;
+		}
+
+		$dims = image_resize_dimensions( $this->size['width'], $this->size['height'], $max_w, $max_h, $crop );
+		if ( ! $dims ) {
+			return new WP_Error( 'error_getting_dimensions', __( 'Could not calculate resized image dimensions' ) );
+		}
+
+		list( $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h ) = $dims;
+
+		if ( $crop ) {
+			return $this->crop( $src_x, $src_y, $src_w, $src_h, $dst_w, $dst_h );
+		}
+
+		// Execute the resize.
+		$thumb_result = $this->thumbnail_image( $dst_w, $dst_h );
+		if ( is_wp_error( $thumb_result ) ) {
+			return $thumb_result;
+		}
+
+		return $this->update_size( $dst_w, $dst_h );
+	}
+
+	/**
+	 * Efficiently resize the current image
+	 *
+	 * This is a WordPress specific implementation of Imagick::thumbnailImage(),
+	 * which resizes an image to given dimensions and removes any associated profiles.
+	 *
+	 * @since 4.5.0
+	 *
+	 * @param int    $dst_w       The destination width.
+	 * @param int    $dst_h       The destination height.
+	 * @param string $filter_name Optional. The Imagick filter to use when resizing. Default 'FILTER_TRIANGLE'.
+	 * @param bool   $strip_meta  Optional. Strip all profiles, excluding color profiles, from the image. Default true.
+	 * @return void|WP_Error
+	 */
+	protected function thumbnail_image( $dst_w, $dst_h, $filter_name = 'FILTER_TRIANGLE', $strip_meta = true ) {
+		$allowed_filters = array(
+			'FILTER_POINT',
+			'FILTER_BOX',
+			'FILTER_TRIANGLE',
+			'FILTER_HERMITE',
+			'FILTER_HANNING',
+			'FILTER_HAMMING',
+			'FILTER_BLACKMAN',
+			'FILTER_GAUSSIAN',
+			'FILTER_QUADRATIC',
+			'FILTER_CUBIC',
+			'FILTER_CATROM',
+			'FILTER_MITCHELL',
+			'FILTER_LANCZOS',
+			'FILTER_BESSEL',
+			'FILTER_SINC',
+		);
+
+		/**
+		 * Set the filter value if '$filter_name' name is in the allowed list and the related
+		 * Imagick constant is defined or fall back to the default filter.
+		 */
+		if ( in_array( $filter_name, $allowed_filters, true ) && defined( 'Imagick::' . $filter_name ) ) {
+			$filter = constant( 'Imagick::' . $filter_name );
+		} else {
+			$filter = defined( 'Imagick::FILTER_TRIANGLE' ) ? Imagick::FILTER_TRIANGLE : false;
+		}
+
+		/**
+		 * Filters whether to strip metadata from images when they're resized.
+		 *
+		 * This filter only applies when resizing using the Imagick editor since GD
+		 * always strips profiles by default.
+		 *
+		 * @since 4.5.0
+		 *
+		 * @param bool $strip_meta Whether to strip image metadata during resizing. Default true.
+		 */
+		if ( apply_filters( 'image_strip_meta', $strip_meta ) ) {
+			$this->strip_meta(); // Fail silently if not supported.
+		}
+
+		try {
+			/*
+			 * To be more efficient, resample large images to 5x the destination size before resizing
+			 * whenever the output size is less that 1/3 of the original image size (1/3^2 ~= .111),
+			 * unless we would be resampling to a scale smaller than 128x128.
+			 */
+			if ( is_callable( array( $this->image, 'sampleImage' ) ) ) {
+				$resize_ratio  = ( $dst_w / $this->size['width'] ) * ( $dst_h / $this->size['height'] );
+				$sample_factor = 5;
+
+				if ( $resize_ratio < .111 && ( $dst_w * $sample_factor > 128 && $dst_h * $sample_factor > 128 ) ) {
+					$this->image->sampleImage( $dst_w * $sample_factor, $dst_h * $sample_factor );
+				}
+			}
+
+			/*
+			 * Use resizeImage() when it's available and a valid filter value is set.
+			 * Otherwise, fall back to the scaleImage() method for resizing, which
+			 * results in better image quality over resizeImage() with default filter
+			 * settings and retains backward compatibility with pre 4.5 functionality.
+			 */
+			if ( is_callable( array( $this->image, 'resizeImage' ) ) && $filter ) {
+				$this->image->setOption( 'filter:support', '2.0' );
+				$this->image->resizeImage( $dst_w, $dst_h, $filter, 1 );
+			} else {
+				$this->image->scaleImage( $dst_w, $dst_h );
+			}
+
+			// Set appropriate quality settings after resizing.
+			if ( 'image/jpeg' === $this->mime_type ) {
+				if ( is_callable( array( $this->image, 'unsharpMaskImage' ) ) ) {
+					$this->image->unsharpMaskImage( 0.25, 0.25, 8, 0.065 );
+				}
+
+				$this->image->setOption( 'jpeg:fancy-upsampling', 'off' );
+			}
+
+			if ( 'image/png' === $this->mime_type ) {
+				$this->image->setOption( 'png:compression-filter', '5' );
+				$this->image->setOption( 'png:compression-level', '9' );
+				$this->image->setOption( 'png:compression-strategy', '1' );
+				$this->image->setOption( 'png:exclude-chunk', 'all' );
+			}
+
+			/*
+			 * If alpha channel is not defined, set it opaque.
+			 *
+			 * Note that Imagick::getImageAlphaChannel() is only available if Imagick
+			 * has been compiled against ImageMagick version 6.4.0 or newer.
+			 */
+			if ( is_callable( array( $this->image, 'getImageAlphaChannel' ) )
+				&& is_callable( array( $this->image, 'setImageAlphaChannel' ) )
+				&& defined( 'Imagick::ALPHACHANNEL_UNDEFINED' )
+				&& defined( 'Imagick::ALPHACHANNEL_OPAQUE' )
+			) {
+				if ( $this->image->getImageAlphaChannel() === Imagick::ALPHACHANNEL_UNDEFINED ) {
+					$this->image->setImageAlphaChannel( Imagick::ALPHACHANNEL_OPAQUE );
+				}
+			}
+
+			// Limit the bit depth of resized images to 8 bits per channel.
+			if ( is_callable( array( $this->image, 'getImageDepth' ) ) && is_callable( array( $this->image, 'setImageDepth' ) ) ) {
+				if ( 8 < $this->image->getImageDepth() ) {
+					$this->image->setImageDepth( 8 );
+				}
+			}
+
+			if ( is_callable( array( $this->image, 'setInterlaceScheme' ) ) && defined( 'Imagick::INTERLACE_NO' ) ) {
+				$this->image->setInterlaceScheme( Imagick::INTERLACE_NO );
+			}
+		} catch ( Exception $e ) {
+			return new WP_Error( 'image_resize_error', $e->getMessage() );
+		}
+	}
+
+	/**
+	 * Create multiple smaller images from a single source.
+	 *
+	 * Attempts to create all sub-sizes and returns the meta data at the end. This
+	 * may result in the server running out of resources. When it fails there may be few
+	 * "orphaned" images left over as the meta data is never returned and saved.
+	 *
+	 * As of 5.3.0 the preferred way to do this is with `make_subsize()`. It creates
+	 * the new images one at a time and allows for the meta data to be saved after
+	 * each new image is created.
+	 *
+	 * @since 3.5.0
+	 *
+	 * @param array $sizes {
+	 *     An array of image size data arrays.
+	 *
+	 *     Either a height or width must be provided.
+	 *     If one of the two is set to null, the resize will
+	 *     maintain aspect ratio according to the provided dimension.
+	 *
+	 *     @type array ...$0 {
+	 *         Array of height, width values, and whether to crop.
+	 *
+	 *         @type int        $width  Image width. Optional if `$height` is specified.
+	 *         @type int        $height Image height. Optional if `$width` is specified.
+	 *         @type bool|array $crop   Optional. Whether to crop the image. Default false.
+	 *     }
+	 * }
+	 * @return array An array of resized images' metadata by size.
+	 */
+	public function multi_resize( $sizes ) {
+		$metadata = array();
+
+		foreach ( $sizes as $size => $size_data ) {
+			$meta = $this->make_subsize( $size_data );
+
+			if ( ! is_wp_error( $meta ) ) {
+				$metadata[ $size ] = $meta;
+			}
+		}
+
+		return $metadata;
+	}
+
+	/**
+	 * Create an image sub-size and return the image meta data value for it.
+	 *
+	 * @since 5.3.0
+	 *
+	 * @param array $size_data {
+	 *     Array of size data.
+	 *
+	 *     @type int        $width  The maximum width in pixels.
+	 *     @type int        $height The maximum height in pixels.
+	 *     @type bool|array $crop   Whether to crop the image to exact dimensions.
+	 * }
+	 * @return array|WP_Error The image data array for inclusion in the `sizes` array in the image meta,
+	 *                        WP_Error object on error.
+	 */
+	public function make_subsize( $size_data ) {
+		if ( ! isset( $size_data['width'] ) && ! isset( $size_data['height'] ) ) {
+			return new WP_Error( 'image_subsize_create_error', __( 'Cannot resize the image. Both width and height are not set.' ) );
+		}
+
+		$orig_size  = $this->size;
+		$orig_image = $this->image->getImage();
+
+		if ( ! isset( $size_data['width'] ) ) {
+			$size_data['width'] = null;
+		}
+
+		if ( ! isset( $size_data['height'] ) ) {
+			$size_data['height'] = null;
+		}
+
+		if ( ! isset( $size_data['crop'] ) ) {
+			$size_data['crop'] = false;
+		}
+
+		if ( ( $this->size['width'] === $size_data['width'] ) && ( $this->size['height'] === $size_data['height'] ) ) {
+			return new WP_Error( 'image_subsize_create_error', __( 'The image already has the requested size.' ) );
+		}
+
+		$resized = $this->resize( $size_data['width'], $size_data['height'], $size_data['crop'] );
+
+		if ( is_wp_error( $resized ) ) {
+			$saved = $resized;
+		} else {
+			$saved = $this->_save( $this->image );
+
+			$this->image->clear();
+			$this->image->destroy();
+			$this->image = null;
+		}
+
+		$this->size  = $orig_size;
+		$this->image = $orig_image;
+
+		if ( ! is_wp_error( $saved ) ) {
+			unset( $saved['path'] );
+		}
+
+		return $saved;
+	}
+
+	/**
+	 * Crops Image.
+	 *
+	 * @since 3.5.0
+	 *
+	 * @param int  $src_x   The start x position to crop from.
+	 * @param int  $src_y   The start y position to crop from.
+	 * @param int  $src_w   The width to crop.
+	 * @param int  $src_h   The height to crop.
+	 * @param int  $dst_w   Optional. The destination width.
+	 * @param int  $dst_h   Optional. The destination height.
+	 * @param bool $src_abs Optional. If the source crop points are absolute.
+	 * @return true|WP_Error
+	 */
+	public function crop( $src_x, $src_y, $src_w, $src_h, $dst_w = null, $dst_h = null, $src_abs = false ) {
+		if ( $src_abs ) {
+			$src_w -= $src_x;
+			$src_h -= $src_y;
+		}
+
+		try {
+			$this->image->cropImage( $src_w, $src_h, $src_x, $src_y );
+			$this->image->setImagePage( $src_w, $src_h, 0, 0 );
+
+			if ( $dst_w || $dst_h ) {
+				/*
+				 * If destination width/height isn't specified,
+				 * use same as width/height from source.
+				 */
+				if ( ! $dst_w ) {
+					$dst_w = $src_w;
+				}
+				if ( ! $dst_h ) {
+					$dst_h = $src_h;
+				}
+
+				$thumb_result = $this->thumbnail_image( $dst_w, $dst_h );
+				if ( is_wp_error( $thumb_result ) ) {
+					return $thumb_result;
+				}
+
+				return $this->update_size();
+			}
+		} catch ( Exception $e ) {
+			return new WP_Error( 'image_crop_error', $e->getMessage() );
+		}
+
+		return $this->update_size();
+	}
+
+	/**
+	 * Rotates current image counter-clockwise by $angle.
+	 *
+	 * @since 3.5.0
+	 *
+	 * @param float $angle
+	 * @return true|WP_Error
+	 */
+	public function rotate( $angle ) {
+		/**
+		 * $angle is 360-$angle because Imagick rotates clockwise
+		 * (GD rotates counter-clockwise)
+		 */
+		try {
+			$this->image->rotateImage( new ImagickPixel( 'none' ), 360 - $angle );
+
+			// Normalize EXIF orientation data so that display is consistent across devices.
+			if ( is_callable( array( $this->image, 'setImageOrientation' ) ) && defined( 'Imagick::ORIENTATION_TOPLEFT' ) ) {
+				$this->image->setImageOrientation( Imagick::ORIENTATION_TOPLEFT );
+			}
+
+			// Since this changes the dimensions of the image, update the size.
+			$result = $this->update_size();
+			if ( is_wp_error( $result ) ) {
+				return $result;
+			}
+
+			$this->image->setImagePage( $this->size['width'], $this->size['height'], 0, 0 );
+		} catch ( Exception $e ) {
+			return new WP_Error( 'image_rotate_error', $e->getMessage() );
+		}
+
+		return true;
+	}
+
+	/**
+	 * Flips current image.
+	 *
+	 * @since 3.5.0
+	 *
+	 * @param bool $horz Flip along Horizontal Axis
+	 * @param bool $vert Flip along Vertical Axis
+	 * @return true|WP_Error
+	 */
+	public function flip( $horz, $vert ) {
+		try {
+			if ( $horz ) {
+				$this->image->flipImage();
+			}
+
+			if ( $vert ) {
+				$this->image->flopImage();
+			}
+
+			// Normalize EXIF orientation data so that display is consistent across devices.
+			if ( is_callable( array( $this->image, 'setImageOrientation' ) ) && defined( 'Imagick::ORIENTATION_TOPLEFT' ) ) {
+				$this->image->setImageOrientation( Imagick::ORIENTATION_TOPLEFT );
+			}
+		} catch ( Exception $e ) {
+			return new WP_Error( 'image_flip_error', $e->getMessage() );
+		}
+
+		return true;
+	}
+
+	/**
+	 * Check if a JPEG image has EXIF Orientation tag and rotate it if needed.
+	 *
+	 * As ImageMagick copies the EXIF data to the flipped/rotated image, proceed only
+	 * if EXIF Orientation can be reset afterwards.
+	 *
+	 * @since 5.3.0
+	 *
+	 * @return bool|WP_Error True if the image was rotated. False if no EXIF data or if the image doesn't need rotation.
+	 *                       WP_Error if error while rotating.
+	 */
+	public function maybe_exif_rotate() {
+		if ( is_callable( array( $this->image, 'setImageOrientation' ) ) && defined( 'Imagick::ORIENTATION_TOPLEFT' ) ) {
+			return parent::maybe_exif_rotate();
+		} else {
+			return new WP_Error( 'write_exif_error', __( 'The image cannot be rotated because the embedded meta data cannot be updated.' ) );
+		}
+	}
+
+	/**
+	 * Saves current image to file.
+	 *
+	 * @since 3.5.0
+	 * @since 6.0.0 The `$filesize` value was added to the returned array.
+	 *
+	 * @param string $destfilename Optional. Destination filename. Default null.
+	 * @param string $mime_type    Optional. The mime-type. Default null.
+	 * @return array|WP_Error {
+	 *     Array on success or WP_Error if the file failed to save.
+	 *
+	 *     @type string $path      Path to the image file.
+	 *     @type string $file      Name of the image file.
+	 *     @type int    $width     Image width.
+	 *     @type int    $height    Image height.
+	 *     @type string $mime-type The mime type of the image.
+	 *     @type int    $filesize  File size of the image.
+	 * }
+	 */
+	public function save( $destfilename = null, $mime_type = null ) {
+		$saved = $this->_save( $this->image, $destfilename, $mime_type );
+
+		if ( ! is_wp_error( $saved ) ) {
+			$this->file      = $saved['path'];
+			$this->mime_type = $saved['mime-type'];
+
+			try {
+				$this->image->setImageFormat( strtoupper( $this->get_extension( $this->mime_type ) ) );
+			} catch ( Exception $e ) {
+				return new WP_Error( 'image_save_error', $e->getMessage(), $this->file );
+			}
+		}
+
+		return $saved;
+	}
+
+	/**
+	 * Removes PDF alpha after it's been read.
+	 *
+	 * @since 6.4.0
+	 */
+	protected function remove_pdf_alpha_channel() {
+		$version = Imagick::getVersion();
+		// Remove alpha channel if possible to avoid black backgrounds for Ghostscript >= 9.14. RemoveAlphaChannel added in ImageMagick 6.7.5.
+		if ( $version['versionNumber'] >= 0x675 ) {
+			try {
+				// Imagick::ALPHACHANNEL_REMOVE mapped to RemoveAlphaChannel in PHP imagick 3.2.0b2.
+				$this->image->setImageAlphaChannel( defined( 'Imagick::ALPHACHANNEL_REMOVE' ) ? Imagick::ALPHACHANNEL_REMOVE : 12 );
+			} catch ( Exception $e ) {
+				return new WP_Error( 'pdf_alpha_process_failed', $e->getMessage() );
+			}
+		}
+	}
+
+	/**
+	 * @since 3.5.0
+	 * @since 6.0.0 The `$filesize` value was added to the returned array.
+	 *
+	 * @param Imagick $image
+	 * @param string  $filename
+	 * @param string  $mime_type
+	 * @return array|WP_Error {
+	 *     Array on success or WP_Error if the file failed to save.
+	 *
+	 *     @type string $path      Path to the image file.
+	 *     @type string $file      Name of the image file.
+	 *     @type int    $width     Image width.
+	 *     @type int    $height    Image height.
+	 *     @type string $mime-type The mime type of the image.
+	 *     @type int    $filesize  File size of the image.
+	 * }
+	 */
+	protected function _save( $image, $filename = null, $mime_type = null ) {
+		list( $filename, $extension, $mime_type ) = $this->get_output_format( $filename, $mime_type );
+
+		if ( ! $filename ) {
+			$filename = $this->generate_filename( null, null, $extension );
+		}
+
+		try {
+			// Store initial format.
+			$orig_format = $this->image->getImageFormat();
+
+			$this->image->setImageFormat( strtoupper( $this->get_extension( $mime_type ) ) );
+		} catch ( Exception $e ) {
+			return new WP_Error( 'image_save_error', $e->getMessage(), $filename );
+		}
+
+		$write_image_result = $this->write_image( $this->image, $filename );
+		if ( is_wp_error( $write_image_result ) ) {
+			return $write_image_result;
+		}
+
+		try {
+			// Reset original format.
+			$this->image->setImageFormat( $orig_format );
+		} catch ( Exception $e ) {
+			return new WP_Error( 'image_save_error', $e->getMessage(), $filename );
+		}
+
+		// Set correct file permissions.
+		$stat  = stat( dirname( $filename ) );
+		$perms = $stat['mode'] & 0000666; // Same permissions as parent folder, strip off the executable bits.
+		chmod( $filename, $perms );
+
+		return array(
+			'path'      => $filename,
+			/** This filter is documented in wp-includes/class-wp-image-editor-gd.php */
+			'file'      => wp_basename( apply_filters( 'image_make_intermediate_size', $filename ) ),
+			'width'     => $this->size['width'],
+			'height'    => $this->size['height'],
+			'mime-type' => $mime_type,
+			'filesize'  => wp_filesize( $filename ),
+		);
+	}
+
+	/**
+	 * Writes an image to a file or stream.
+	 *
+	 * @since 5.6.0
+	 *
+	 * @param Imagick $image
+	 * @param string  $filename The destination filename or stream URL.
+	 * @return true|WP_Error
+	 */
+	private function write_image( $image, $filename ) {
+		if ( wp_is_stream( $filename ) ) {
+			/*
+			 * Due to reports of issues with streams with `Imagick::writeImageFile()` and `Imagick::writeImage()`, copies the blob instead.
+			 * Checks for exact type due to: https://www.php.net/manual/en/function.file-put-contents.php
+			 */
+			if ( file_put_contents( $filename, $image->getImageBlob() ) === false ) {
+				return new WP_Error(
+					'image_save_error',
+					sprintf(
+						/* translators: %s: PHP function name. */
+						__( '%s failed while writing image to stream.' ),
+						'<code>file_put_contents()</code>'
+					),
+					$filename
+				);
+			} else {
+				return true;
+			}
+		} else {
+			$dirname = dirname( $filename );
+
+			if ( ! wp_mkdir_p( $dirname ) ) {
+				return new WP_Error(
+					'image_save_error',
+					sprintf(
+						/* translators: %s: Directory path. */
+						__( 'Unable to create directory %s. Is its parent directory writable by the server?' ),
+						esc_html( $dirname )
+					)
+				);
+			}
+
+			try {
+				return $image->writeImage( $filename );
+			} catch ( Exception $e ) {
+				return new WP_Error( 'image_save_error', $e->getMessage(), $filename );
+			}
+		}
+	}
+
+	/**
+	 * Streams current image to browser.
+	 *
+	 * @since 3.5.0
+	 *
+	 * @param string $mime_type The mime type of the image.
+	 * @return true|WP_Error True on success, WP_Error object on failure.
+	 */
+	public function stream( $mime_type = null ) {
+		list( $filename, $extension, $mime_type ) = $this->get_output_format( null, $mime_type );
+
+		try {
+			// Temporarily change format for stream.
+			$this->image->setImageFormat( strtoupper( $extension ) );
+
+			// Output stream of image content.
+			header( "Content-Type: $mime_type" );
+			print $this->image->getImageBlob();
+
+			// Reset image to original format.
+			$this->image->setImageFormat( $this->get_extension( $this->mime_type ) );
+		} catch ( Exception $e ) {
+			return new WP_Error( 'image_stream_error', $e->getMessage() );
+		}
+
+		return true;
+	}
+
+	/**
+	 * Strips all image meta except color profiles from an image.
+	 *
+	 * @since 4.5.0
+	 *
+	 * @return true|WP_Error True if stripping metadata was successful. WP_Error object on error.
+	 */
+	protected function strip_meta() {
+
+		if ( ! is_callable( array( $this->image, 'getImageProfiles' ) ) ) {
+			return new WP_Error(
+				'image_strip_meta_error',
+				sprintf(
+					/* translators: %s: ImageMagick method name. */
+					__( '%s is required to strip image meta.' ),
+					'<code>Imagick::getImageProfiles()</code>'
+				)
+			);
+		}
+
+		if ( ! is_callable( array( $this->image, 'removeImageProfile' ) ) ) {
+			return new WP_Error(
+				'image_strip_meta_error',
+				sprintf(
+					/* translators: %s: ImageMagick method name. */
+					__( '%s is required to strip image meta.' ),
+					'<code>Imagick::removeImageProfile()</code>'
+				)
+			);
+		}
+
+		/*
+		 * Protect a few profiles from being stripped for the following reasons:
+		 *
+		 * - icc:  Color profile information
+		 * - icm:  Color profile information
+		 * - iptc: Copyright data
+		 * - exif: Orientation data
+		 * - xmp:  Rights usage data
+		 */
+		$protected_profiles = array(
+			'icc',
+			'icm',
+			'iptc',
+			'exif',
+			'xmp',
+		);
+
+		try {
+			// Strip profiles.
+			foreach ( $this->image->getImageProfiles( '*', true ) as $key => $value ) {
+				if ( ! in_array( $key, $protected_profiles, true ) ) {
+					$this->image->removeImageProfile( $key );
+				}
+			}
+		} catch ( Exception $e ) {
+			return new WP_Error( 'image_strip_meta_error', $e->getMessage() );
+		}
+
+		return true;
+	}
+
+	/**
+	 * Sets up Imagick for PDF processing.
+	 * Increases rendering DPI and only loads first page.
+	 *
+	 * @since 4.7.0
+	 *
+	 * @return string|WP_Error File to load or WP_Error on failure.
+	 */
+	protected function pdf_setup() {
+		try {
+			/*
+			 * By default, PDFs are rendered in a very low resolution.
+			 * We want the thumbnail to be readable, so increase the rendering DPI.
+			 */
+			$this->image->setResolution( 128, 128 );
+
+			// Only load the first page.
+			return $this->file . '[0]';
+		} catch ( Exception $e ) {
+			return new WP_Error( 'pdf_setup_failed', $e->getMessage(), $this->file );
+		}
+	}
+
+	/**
+	 * Load the image produced by Ghostscript.
+	 *
+	 * Includes a workaround for a bug in Ghostscript 8.70 that prevents processing of some PDF files
+	 * when `use-cropbox` is set.
+	 *
+	 * @since 5.6.0
+	 *
+	 * @return true|WP_Error
+	 */
+	protected function pdf_load_source() {
+		$filename = $this->pdf_setup();
+
+		if ( is_wp_error( $filename ) ) {
+			return $filename;
+		}
+
+		try {
+			/*
+			 * When generating thumbnails from cropped PDF pages, Imagemagick uses the uncropped
+			 * area (resulting in unnecessary whitespace) unless the following option is set.
+			 */
+			$this->image->setOption( 'pdf:use-cropbox', true );
+
+			/*
+			 * Reading image after Imagick instantiation because `setResolution`
+			 * only applies correctly before the image is read.
+			 */
+			$this->image->readImage( $filename );
+		} catch ( Exception $e ) {
+			// Attempt to run `gs` without the `use-cropbox` option. See #48853.
+			$this->image->setOption( 'pdf:use-cropbox', false );
+
+			$this->image->readImage( $filename );
+		}
+
+		return true;
+	}
+}