FM / wp-includes

/home/desid573/verdenaturopathy.com.au/wp-includes/

/home/desid573/verdenaturopathy.com.au/wp-includes

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Edit: /home/desid573/verdenaturopathy.com.au/wp-includes/class-wp-image-editor-imagick.php (43454B)

<?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;

/**
	 * Temporarily stores stream image data while processing internally.
	 *
	 * @see self::pdf_load_source()
	 *
	 * @since 7.0.4
	 *
	 * @var string|null
	 */
	private $stream_file_data = null;

/**
	 * Temporarily stores the parsed given name for an image while processing internally.
	 *
	 * @see self::pdf_load_source()
	 *
	 * @since 7.0.4
	 *
	 * @var string|null
	 */
	private $image_given_name = null;

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;
		}

$is_stream = wp_is_stream( $this->file );
		$is_file   = ! $is_stream && is_file( $this->file );

// Only allow loading files or streams.
		if ( ! $is_file && ! $is_stream ) {
			return new WP_Error( 'error_loading_image', __( 'File does not exist?' ), $this->file );
		}

// Establish the provided filename based on the kind of resource being loaded.
		$given_filename = $this->file;
		if ( 0 === strncasecmp( $given_filename, 'file://', 7 ) ) {
			$given_filename = basename( substr( $given_filename, 7 ) ); // 7 is the strlen of 'file://'.
		} elseif ( 1 === preg_match( '~^https?://~i', $this->file ) ) {
			/*
			 * For URLs, it will be the final path segment.
			 *
			 * Example:
			 *
			 *     https://wordpress.org/i/happy.png?size=40px
			 *                             ╰───────╯
			 *                                this is the given filename
			 *
			 * If the stream returns a `Content-Disposition` header it would
			 * provide an alternative name, but this is used as a reasonable
			 * proxy to avoid adding the additional complexity of reading and
			 * parsing the returned HTTP headers.
			 */
			$url_path = wp_parse_url( $this->file, PHP_URL_PATH );

// This URL can not be parsed, so it is not a valid image resource.
			if ( false === $url_path ) {
				return new WP_Error( 'error_loading_image', __( 'File is not an image.' ), $this->file );
			}

/**
			 * The URL has an empty path, so continue with an empty string.
			 *
			 * This is the case with a URL such as `https://example.com?file_id=123`
			 */
			if ( null === $url_path ) {
				$url_path = '';
			}

$last_path_at   = strrpos( $url_path, '/' );
			$given_filename = is_int( $last_path_at ) ? substr( $url_path, $last_path_at + 1 ) : $url_path;
			$given_filename = rawurldecode( $given_filename );
		}

/*
		 * Strip off any potential `Imagick` format specifiers.
		 *
		 * If a real file exists with the identified format specifier, then
		 * `Imagick` may not treat it as a format, but WordPress will reject
		 * it anyway to avoid adding more complexity into this detection.
		 *
		 * `Imagick` reads only the first `FORMAT:` specifier on a name, but
		 * stripping a segment would promote a second specifier to the front
		 * of the name handed to `Imagick`, which would then honor it.
		 *
		 * Loop to capture all format specifiers for comparison.
		 *
		 * Exclude Windows drive-letter prefixes from here.
		 */
		$imagick_formats = array();
		while (
			false !== ( $format_ends_at = strpos( $given_filename, ':' ) ) &&
			1 !== preg_match( '~^[a-z]:~i', $given_filename )
		) {
			$imagick_formats[] = strtoupper( substr( $given_filename, 0, $format_ends_at ) );
			$given_filename    = substr( $given_filename, $format_ends_at + 1 );
		}

$file_extension = strtolower( pathinfo( $given_filename, PATHINFO_EXTENSION ) );

/*
		 * 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' );

/**
		 * Read the resource header for MIME sniffing.
		 *
		 * For files, which will be passed into Imagick by their file names, avoid
		 * eagerly loading the entire contents into PHP memory. For streams, however,
		 * it’s more important to avoid validating a separate copy of the file data
		 * than is later fetched by Imagick, so go ahead and load the entire payload,
		 * then pass it to Imagick as the data blob itself.
		 *
		 * @link https://mimesniff.spec.whatwg.org/#reading-the-resource-header
		 */
		try {
			if ( $is_file ) {
				$file_data = file_get_contents( $this->file, false, null, 0, 1445 );
			} else {
				$file_data = file_get_contents( $this->file );
			}
		} catch ( Exception $e ) {
			$file_data = false;
		}
		if ( false === $file_data ) {
			return new WP_Error( 'error_loading_image', __( 'File does not exist?' ), $this->file );
		}

$pdf_extensions = array(
			'ai',
			'epdf',
			'pdf',
			'pdfa',
			'pocketmod',
		);

// Reject files claiming to be PDFs which lack the required signature.
		$has_pdf_extension = in_array( $file_extension, $pdf_extensions, true );
		$has_pdf_signature = str_starts_with( $file_data, '%PDF-' );
		if ( $has_pdf_extension && ! $has_pdf_signature ) {
			return new WP_Error( 'invalid_image', __( 'File is not an image.' ), $this->file );
		}

$ps_formats = array(
			'DPS',
			'EPI',
			'EPS',
			'EPSF',
			'EPSI',
			'PS',
			'WPG',
		);

$ps_extensions = array(
			'dps',
			'epi',
			'eps',
			'eps2',
			'eps3',
			'epsf',
			'epsi',
			'ept',
			'ept2',
			'ept3',
			'ps',
			'ps2',
			'ps3',
			'wpg',
		);

// Reject files which Imagick will parse as PostScript.
		if (
			array() !== array_intersect( $imagick_formats, $ps_formats ) ||
			in_array( $file_extension, $ps_extensions, true ) ||
			str_starts_with( $file_data, '%!' ) ||
			str_starts_with( $file_data, "\x04%!" ) ||
			str_starts_with( $file_data, "\xC5\xD0\xD3\xC6" ) ||
			str_starts_with( $file_data, "\xFFWPC" )
		) {
			return new WP_Error( 'invalid_image', __( 'File is not an image.' ), $this->file );
		}

$compressed_extensions = array(
			'gz',
			'bz2',
			'svgz',
			'z',
			'wmz',
		);

/*
		 * Reject compressed archives that Imagick will transparently decompress.
		 * Unfortunately this rejects `.svgz` because there’s no intermediate step
		 * in the loading process. `Imagick` would decompress the file, then look
		 * to see what kind of content was decompressed instead of asserting SVG.
		 */
		if (
			in_array( $file_extension, $compressed_extensions, true ) ||
			str_starts_with( $file_data, "\x1F\x8B\x08" ) || // gzip
			str_starts_with( $file_data, 'BZh' ) || // bzip2
			str_starts_with( $file_data, "\x1F\x9D" ) // compress
		) {
			return new WP_Error( 'invalid_image', __( 'File is not an image.' ), $this->file );
		}

try {
			$this->image = new Imagick();

if ( $has_pdf_signature ) {
				/*
				 * Load these values for use in the helper method without forcing a change
				 * of its expected arguments, but then free them after calling to prevent
				 * keeping them around in memory and bloating the app.
				 */
				$this->stream_file_data = $is_stream ? $file_data : null;
				$this->image_given_name = $given_filename;
				$pdf_loaded             = $this->pdf_load_source();
				$this->stream_file_data = null;
				$this->image_given_name = null;

if ( is_wp_error( $pdf_loaded ) ) {
					return $pdf_loaded;
				}
			} else {
				if ( $is_stream ) {
					$this->image->readImageBlob( $file_data, $given_filename );
				} 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 ( $has_pdf_signature ) {
				$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
	 * @since 6.8.0 The `$dims` parameter was added.
	 *
	 * @param int   $quality Compression Quality. Range: [1,100]
	 * @param array $dims    Optional. Image dimensions array with 'width' and 'height' keys.
	 * @return true|WP_Error True if set successfully; WP_Error on failure.
	 */
	public function set_quality( $quality = null, $dims = array() ) {
		$quality_result = parent::set_quality( $quality, $dims );
		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->setCompressionQuality( $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->setCompressionQuality( 100 );
						$this->image->setOption( 'webp:lossless', 'true' );
						parent::set_quality( 100 );
					} else {
						$this->image->setImageCompressionQuality( $quality );
						$this->image->setCompressionQuality( $quality );
					}
					break;
				case 'image/avif':
					// Set the AVIF encoder to work faster, with minimal impact on image size.
					$this->image->setOption( 'heic:speed', 7 );
					$this->image->setImageCompressionQuality( $quality );
					$this->image->setCompressionQuality( $quality );
					break;
				default:
					$this->image->setImageCompressionQuality( $quality );
					$this->image->setCompressionQuality( $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|null $width  Image width.
	 * @param int|null $height Image 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'];
		}

/*
		 * If we still don't have the image size, fall back to `wp_getimagesize`. This ensures AVIF and HEIC images
		 * are properly sized without affecting previous `getImageGeometry` behavior.
		 */
		if ( ( ! $width || ! $height ) && ( 'image/avif' === $this->mime_type || wp_is_heic_image_mime_type( $this->mime_type ) ) ) {
			$size   = wp_getimagesize( $this->file );
			$width  = $size[0];
			$height = $size[1];
		}

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
	 * @deprecated 6.3.0 No longer used in core.
	 *
	 * @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 );
		}

$this->set_quality(
			null,
			array(
				'width'  => $dst_w,
				'height' => $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 {
			/**
			 * Special handling for certain types of PNG images:
			 * 1. For PNG images, we need to specify compression settings and remove unneeded chunks.
			 * 2. For indexed PNG images, the number of colors must not exceed 256.
			 * 3. For indexed PNG images with an alpha channel, the tRNS chunk must be preserved.
			 * 4. For indexed PNG images with true alpha transparency (an alpha channel > 1 bit), we need to avoid saving
			 * the image using ImageMagick's 'png8' format,  because that supports only binary (1 bit) transparency.
			 *
			 * For #4 we want to check whether the image has a 1-bit alpha channel before resizing,  because resizing
			 * may cause the number of alpha values to multiply due to antialiasing. If the original image had only a
			 * 1-bit alpha channel, then a 1-bit alpha channel should be good enough for the resized images.
			 *
			 * Perform all the necessary checks before resizing the image and store the results in variables for later use.
			 */
			$is_png                                      = false;
			$is_indexed_png                              = false;
			$is_indexed_png_with_alpha_channel           = false;
			$is_indexed_png_with_true_alpha_transparency = false;

if ( 'image/png' === $this->mime_type ) {
				$is_png = true;

if (
					is_callable( array( $this->image, 'getImageProperty' ) )
					&& '3' === $this->image->getImageProperty( 'png:IHDR.color-type-orig' )
				) {
					$is_indexed_png = true;

if (
						is_callable( array( $this->image, 'getImageAlphaChannel' ) )
						&& $this->image->getImageAlphaChannel()
					) {
						$is_indexed_png_with_alpha_channel = true;

if (
							is_callable( array( $this->image, 'getImageChannelDepth' ) )
							&& defined( 'Imagick::CHANNEL_ALPHA' )
							&& 1 < $this->image->getImageChannelDepth( Imagick::CHANNEL_ALPHA )
						) {
							$is_indexed_png_with_true_alpha_transparency = true;
						}
					}
				}
			}

/*
			 * 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 ( $is_png ) {
				$this->image->setOption( 'png:compression-filter', '5' );
				$this->image->setOption( 'png:compression-level', '9' );
				$this->image->setOption( 'png:compression-strategy', '1' );

// Indexed PNG files get some additional handling.
				// See #63448 for details.
				if ( $is_indexed_png ) {

// Check for an alpha channel.
					if ( $is_indexed_png_with_alpha_channel ) {
						$this->image->setOption( 'png:include-chunk', 'tRNS' );
					} else {
						$this->image->setOption( 'png:exclude-chunk', 'all' );
					}

$this->image->quantizeImage( 256, $this->image->getColorspace(), 0, false, false );

/*
					 * If the colorspace is 'gray', use the png8 format to ensure it stays indexed.
					 * ImageMagick tends to save grayscale images as grayscale PNGs rather than indexed PNGs,
					 * even though grayscale PNGs usually have considerably larger file sizes.
					 * But we can force ImageMagick to save the image as an indexed PNG instead,
					 * by telling it to use png8 format.
					 *
					 * Note that we need to first call quantizeImage() before checking getImageColorspace(),
					 * because only after calling quantizeImage() will the colorspace be COLORSPACE_GRAY for grayscale images
					 * (and we have not found any other way to identify grayscale images).
					 *
					 * We need to avoid forcing indexed format for images with true alpha transparency,
					 * because ImageMagick does not support saving an image with true alpha transparency as an indexed PNG.
					 */
					if ( Imagick::COLORSPACE_GRAY === $this->image->getImageColorspace() && ! $is_indexed_png_with_true_alpha_transparency ) {
						// Set the image format to Indexed PNG.
						$this->image->setOption( 'png:format', 'png8' );
					}
				} else {
					$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.
			if ( is_callable( array( $this->image, 'getImageDepth' ) ) && is_callable( array( $this->image, 'setImageDepth' ) ) ) {
				/**
				 * Filters the maximum bit depth of resized images.
				 *
				 * This filter only applies when resizing using the Imagick editor since GD
				 * does not support getting or setting bit depth.
				 *
				 * Use this to adjust the maximum bit depth of resized images.
				 *
				 * @since 6.8.0
				 *
				 * @param int $max_depth   The maximum bit depth. Default is the input depth.
				 * @param int $image_depth The bit depth of the original image.
				 */
				$max_depth = apply_filters( 'image_max_bit_depth', $this->image->getImageDepth(), $this->image->getImageDepth() );
				$this->image->setImageDepth( $max_depth );
			}
		} 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();
			}

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 );
		}

if ( method_exists( $this->image, 'setInterlaceScheme' )
			&& method_exists( $this->image, 'getInterlaceScheme' )
			&& defined( 'Imagick::INTERLACE_PLANE' )
		) {
			$orig_interlace = $this->image->getInterlaceScheme();

/** This filter is documented in wp-includes/class-wp-image-editor-gd.php */
			if ( apply_filters( 'image_save_progressive', false, $mime_type ) ) {
				$this->image->setInterlaceScheme( Imagick::INTERLACE_PLANE ); // True - line interlace output.
			} else {
				$this->image->setInterlaceScheme( Imagick::INTERLACE_NO ); // False - no interlace output.
			}
		}

$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 );

if ( isset( $orig_interlace ) ) {
				$this->image->setInterlaceScheme( $orig_interlace );
			}
		} 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;
		}

foreach ( array( 'true', 'false' ) as $use_cropbox ) {
			try {
				/**
				 * When generating thumbnails from cropped PDF pages, Imagemagick uses the uncropped
				 * area (resulting in unnecessary whitespace) unless the following option is set.
				 *
				 * However, it sometimes fails, so if that happens, run it without the option.
				 *
				 * @ticket 48853
				 */
				$this->image->setOption( 'pdf:use-cropbox', $use_cropbox );

/*
				 * Reading image after Imagick instantiation because `setResolution`
				 * only applies correctly before the image is read.
				 */
				if ( is_string( $this->stream_file_data ) ) {
					$this->image->setFilename( 'PDF:unknown.pdf[0]' );
					$this->image->readImageBlob( $this->stream_file_data, $this->image_given_name );
				} else {
					$this->image->readImage( $filename );
				}

return true;
			} catch ( Exception $e ) {
				continue;
			}
		}

return new WP_Error( 'invalid_image', __( 'File is not an image.' ), $this->file );
	}
}

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