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<?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', ); // 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; } // HHVM Imagick does not support loading from URL, so fail to allow fallback to GD. if ( defined( 'HHVM_VERSION' ) && isset( $args['path'] ) && preg_match( '\|^https?://\|', $args['path'] ) ) { 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' ) && $mime_type != 'image/jpeg' ) { return false; } try { 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 ) && ! preg_match( '\|^https?://\|', $this->file ) ) { return new WP_Error( 'error_loading_image', __( 'File doesn’t 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 ) ); $filename = $this->file; if ( 'pdf' == $file_extension ) { $filename = $this->pdf_setup(); } // Reading image after Imagick instantiation because `setResolution` // only applies correctly before the image is read. $this->image->readImage( $filename ); 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 ); } $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 { if ( 'image/jpeg' == $this->mime_type ) { $this->image->setImageCompressionQuality( $quality ); $this->image->setImageCompression( imagick::COMPRESSION_JPEG ); } else { $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 ); } /* * 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 $crop * @return bool\|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 bool\|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 our whitelist and the related * Imagick constant is defined or fall back to our default filter. / if ( in_array( $filter_name, $allowed_filters ) && 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() ); } } /* * Resize multiple images from a single source. * * @since 3.5.0 * * @param array $sizes { * An array of image size arrays. Default sizes are 'small', 'medium', 'medium_large', 'large'. * * 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 $size { * 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 $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(); $orig_size = $this->size; $orig_image = $this->image->getImage(); foreach ( $sizes as $size => $size_data ) { if ( ! $this->image ) { $this->image = $orig_image->getImage(); } if ( ! isset( $size_data['width'] ) && ! isset( $size_data['height'] ) ) { continue; } 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; } $resize_result = $this->resize( $size_data['width'], $size_data['height'], $size_data['crop'] ); $duplicate = ( ( $orig_size['width'] == $size_data['width'] ) && ( $orig_size['height'] == $size_data['height'] ) ); if ( ! is_wp_error( $resize_result ) && ! $duplicate ) { $resized = $this->_save( $this->image ); $this->image->clear(); $this->image->destroy(); $this->image = null; if ( ! is_wp_error( $resized ) && $resized ) { unset( $resized['path'] ); $metadata[ $size ] = $resized; } } $this->size = $orig_size; } $this->image = $orig_image; return $metadata; } /* * 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 bool\|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 ); // Normalise 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(); } } catch ( Exception $e ) { return new WP_Error( 'image_flip_error', $e->getMessage() ); } return true; } /* * Saves current image to file. * * @since 3.5.0 * * @param string $destfilename * @param string $mime_type * @return array\|WP_Error {'path'=>string, 'file'=>string, 'width'=>int, 'height'=>int, 'mime-type'=>string} / 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; } /* * @param Imagick $image * @param string $filename * @param string $mime_type * @return array\|WP_Error / 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 ) ) ); $this->make_image( $filename, array( $image, 'writeImage' ), array( $filename ) ); // 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 ); /* This filter is documented in site-inc/class-wp-image-editor-gd.php / return array( 'path' => $filename, 'file' => wp_basename( apply_filters( 'image_make_intermediate_size', $filename ) ), 'width' => $this->size['width'], 'height' => $this->size['height'], 'mime-type' => $mime_type, ); } /* * Streams current image to browser. * * @since 3.5.0 * * @param string $mime_type The mime type of the image. * @return bool\|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' ) ) ) { / translators: %s: ImageMagick method name / return new WP_Error( 'image_strip_meta_error', sprintf( __( '%s is required to strip image meta.' ), '<code>Imagick::getImageProfiles()</code>' ) ); } if ( ! is_callable( array( $this->image, 'removeImageProfile' ) ) ) { / translators: %s: ImageMagick method name / return new WP_Error( 'image_strip_meta_error', sprintf( __( '%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 ) ) { $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 ); } } }