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Editing: class-wp-image-editor-imagick.php
<?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(); } // 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 ); } 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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