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752 lines
21 KiB
752 lines
21 KiB
<?php |
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/** |
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* WordPress Imagick Image Editor |
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* |
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* @package WordPress |
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* @subpackage Image_Editor |
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*/ |
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|
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/** |
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* WordPress Image Editor Class for Image Manipulation through Imagick PHP Module |
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* |
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* @since 3.5.0 |
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* |
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* @see WP_Image_Editor |
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*/ |
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class WP_Image_Editor_Imagick extends WP_Image_Editor { |
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/** |
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* Imagick object. |
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* |
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* @var Imagick |
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*/ |
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protected $image; |
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|
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public function __destruct() { |
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if ( $this->image instanceof Imagick ) { |
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// we don't need the original in memory anymore |
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$this->image->clear(); |
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$this->image->destroy(); |
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} |
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} |
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|
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/** |
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* Checks to see if current environment supports Imagick. |
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* |
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* We require Imagick 2.2.0 or greater, based on whether the queryFormats() |
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* method can be called statically. |
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* |
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* @since 3.5.0 |
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* |
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* @static |
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* |
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* @param array $args |
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* @return bool |
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*/ |
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public static function test( $args = array() ) { |
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|
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// First, test Imagick's extension and classes. |
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if ( ! extension_loaded( 'imagick' ) || ! class_exists( 'Imagick', false ) || ! class_exists( 'ImagickPixel', false ) ) |
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return false; |
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|
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if ( version_compare( phpversion( 'imagick' ), '2.2.0', '<' ) ) |
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return false; |
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|
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$required_methods = array( |
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'clear', |
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'destroy', |
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'valid', |
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'getimage', |
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'writeimage', |
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'getimageblob', |
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'getimagegeometry', |
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'getimageformat', |
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'setimageformat', |
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'setimagecompression', |
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'setimagecompressionquality', |
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'setimagepage', |
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'setoption', |
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'scaleimage', |
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'cropimage', |
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'rotateimage', |
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'flipimage', |
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'flopimage', |
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'readimage', |
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); |
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|
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// Now, test for deep requirements within Imagick. |
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if ( ! defined( 'imagick::COMPRESSION_JPEG' ) ) |
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return false; |
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|
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$class_methods = array_map( 'strtolower', get_class_methods( 'Imagick' ) ); |
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if ( array_diff( $required_methods, $class_methods ) ) { |
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return false; |
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} |
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|
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// HHVM Imagick does not support loading from URL, so fail to allow fallback to GD. |
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if ( defined( 'HHVM_VERSION' ) && isset( $args['path'] ) && preg_match( '|^https?://|', $args['path'] ) ) { |
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return false; |
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} |
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|
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return true; |
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} |
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|
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/** |
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* Checks to see if editor supports the mime-type specified. |
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* |
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* @since 3.5.0 |
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* |
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* @static |
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* |
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* @param string $mime_type |
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* @return bool |
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*/ |
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public static function supports_mime_type( $mime_type ) { |
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$imagick_extension = strtoupper( self::get_extension( $mime_type ) ); |
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|
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if ( ! $imagick_extension ) |
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return false; |
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|
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// setIteratorIndex is optional unless mime is an animated format. |
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// Here, we just say no if you are missing it and aren't loading a jpeg. |
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if ( ! method_exists( 'Imagick', 'setIteratorIndex' ) && $mime_type != 'image/jpeg' ) |
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return false; |
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|
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try { |
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return ( (bool) @Imagick::queryFormats( $imagick_extension ) ); |
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} |
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catch ( Exception $e ) { |
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return false; |
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} |
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} |
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|
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/** |
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* Loads image from $this->file into new Imagick Object. |
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* |
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* @since 3.5.0 |
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* |
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* @return true|WP_Error True if loaded; WP_Error on failure. |
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*/ |
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public function load() { |
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if ( $this->image instanceof Imagick ) |
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return true; |
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|
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if ( ! is_file( $this->file ) && ! preg_match( '|^https?://|', $this->file ) ) |
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return new WP_Error( 'error_loading_image', __('File doesn’t exist?'), $this->file ); |
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|
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/* |
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* Even though Imagick uses less PHP memory than GD, set higher limit |
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* for users that have low PHP.ini limits. |
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*/ |
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wp_raise_memory_limit( 'image' ); |
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|
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try { |
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$this->image = new Imagick(); |
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$file_extension = strtolower( pathinfo( $this->file, PATHINFO_EXTENSION ) ); |
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$filename = $this->file; |
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|
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if ( 'pdf' == $file_extension ) { |
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$filename = $this->pdf_setup(); |
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} |
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// Reading image after Imagick instantiation because `setResolution` |
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// only applies correctly before the image is read. |
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$this->image->readImage( $filename ); |
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|
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if ( ! $this->image->valid() ) |
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return new WP_Error( 'invalid_image', __('File is not an image.'), $this->file); |
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|
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// Select the first frame to handle animated images properly |
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if ( is_callable( array( $this->image, 'setIteratorIndex' ) ) ) |
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$this->image->setIteratorIndex(0); |
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|
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$this->mime_type = $this->get_mime_type( $this->image->getImageFormat() ); |
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} |
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catch ( Exception $e ) { |
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return new WP_Error( 'invalid_image', $e->getMessage(), $this->file ); |
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} |
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$updated_size = $this->update_size(); |
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if ( is_wp_error( $updated_size ) ) { |
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return $updated_size; |
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} |
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|
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return $this->set_quality(); |
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} |
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/** |
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* Sets Image Compression quality on a 1-100% scale. |
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* |
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* @since 3.5.0 |
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* |
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* @param int $quality Compression Quality. Range: [1,100] |
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* @return true|WP_Error True if set successfully; WP_Error on failure. |
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*/ |
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public function set_quality( $quality = null ) { |
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$quality_result = parent::set_quality( $quality ); |
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if ( is_wp_error( $quality_result ) ) { |
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return $quality_result; |
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} else { |
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$quality = $this->get_quality(); |
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} |
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try { |
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if ( 'image/jpeg' == $this->mime_type ) { |
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$this->image->setImageCompressionQuality( $quality ); |
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$this->image->setImageCompression( imagick::COMPRESSION_JPEG ); |
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} |
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else { |
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$this->image->setImageCompressionQuality( $quality ); |
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} |
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} |
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catch ( Exception $e ) { |
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return new WP_Error( 'image_quality_error', $e->getMessage() ); |
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} |
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return true; |
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} |
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/** |
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* Sets or updates current image size. |
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* |
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* @since 3.5.0 |
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* |
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* @param int $width |
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* @param int $height |
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* |
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* @return true|WP_Error |
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*/ |
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protected function update_size( $width = null, $height = null ) { |
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$size = null; |
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if ( !$width || !$height ) { |
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try { |
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$size = $this->image->getImageGeometry(); |
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} |
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catch ( Exception $e ) { |
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return new WP_Error( 'invalid_image', __( 'Could not read image size.' ), $this->file ); |
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} |
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} |
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if ( ! $width ) |
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$width = $size['width']; |
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|
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if ( ! $height ) |
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$height = $size['height']; |
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return parent::update_size( $width, $height ); |
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} |
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/** |
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* Resizes current image. |
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* |
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* At minimum, either a height or width must be provided. |
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* If one of the two is set to null, the resize will |
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* maintain aspect ratio according to the provided dimension. |
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* |
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* @since 3.5.0 |
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* |
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* @param int|null $max_w Image width. |
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* @param int|null $max_h Image height. |
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* @param bool $crop |
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* @return bool|WP_Error |
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*/ |
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public function resize( $max_w, $max_h, $crop = false ) { |
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if ( ( $this->size['width'] == $max_w ) && ( $this->size['height'] == $max_h ) ) |
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return true; |
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$dims = image_resize_dimensions( $this->size['width'], $this->size['height'], $max_w, $max_h, $crop ); |
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if ( ! $dims ) |
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return new WP_Error( 'error_getting_dimensions', __('Could not calculate resized image dimensions') ); |
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list( $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h ) = $dims; |
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|
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if ( $crop ) { |
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return $this->crop( $src_x, $src_y, $src_w, $src_h, $dst_w, $dst_h ); |
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} |
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|
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// Execute the resize |
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$thumb_result = $this->thumbnail_image( $dst_w, $dst_h ); |
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if ( is_wp_error( $thumb_result ) ) { |
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return $thumb_result; |
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} |
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|
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return $this->update_size( $dst_w, $dst_h ); |
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} |
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|
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/** |
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* Efficiently resize the current image |
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* |
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* This is a WordPress specific implementation of Imagick::thumbnailImage(), |
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* which resizes an image to given dimensions and removes any associated profiles. |
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* |
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* @since 4.5.0 |
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* |
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* @param int $dst_w The destination width. |
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* @param int $dst_h The destination height. |
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* @param string $filter_name Optional. The Imagick filter to use when resizing. Default 'FILTER_TRIANGLE'. |
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* @param bool $strip_meta Optional. Strip all profiles, excluding color profiles, from the image. Default true. |
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* @return bool|WP_Error |
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*/ |
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protected function thumbnail_image( $dst_w, $dst_h, $filter_name = 'FILTER_TRIANGLE', $strip_meta = true ) { |
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$allowed_filters = array( |
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'FILTER_POINT', |
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'FILTER_BOX', |
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'FILTER_TRIANGLE', |
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'FILTER_HERMITE', |
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'FILTER_HANNING', |
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'FILTER_HAMMING', |
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'FILTER_BLACKMAN', |
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'FILTER_GAUSSIAN', |
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'FILTER_QUADRATIC', |
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'FILTER_CUBIC', |
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'FILTER_CATROM', |
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'FILTER_MITCHELL', |
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'FILTER_LANCZOS', |
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'FILTER_BESSEL', |
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'FILTER_SINC', |
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); |
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|
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/** |
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* Set the filter value if '$filter_name' name is in our whitelist and the related |
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* Imagick constant is defined or fall back to our default filter. |
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*/ |
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if ( in_array( $filter_name, $allowed_filters ) && defined( 'Imagick::' . $filter_name ) ) { |
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$filter = constant( 'Imagick::' . $filter_name ); |
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} else { |
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$filter = defined( 'Imagick::FILTER_TRIANGLE' ) ? Imagick::FILTER_TRIANGLE : false; |
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} |
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|
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/** |
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* Filters whether to strip metadata from images when they're resized. |
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* |
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* This filter only applies when resizing using the Imagick editor since GD |
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* always strips profiles by default. |
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* |
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* @since 4.5.0 |
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* |
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* @param bool $strip_meta Whether to strip image metadata during resizing. Default true. |
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*/ |
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if ( apply_filters( 'image_strip_meta', $strip_meta ) ) { |
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$this->strip_meta(); // Fail silently if not supported. |
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} |
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|
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try { |
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/* |
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* To be more efficient, resample large images to 5x the destination size before resizing |
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* whenever the output size is less that 1/3 of the original image size (1/3^2 ~= .111), |
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* unless we would be resampling to a scale smaller than 128x128. |
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*/ |
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if ( is_callable( array( $this->image, 'sampleImage' ) ) ) { |
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$resize_ratio = ( $dst_w / $this->size['width'] ) * ( $dst_h / $this->size['height'] ); |
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$sample_factor = 5; |
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|
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if ( $resize_ratio < .111 && ( $dst_w * $sample_factor > 128 && $dst_h * $sample_factor > 128 ) ) { |
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$this->image->sampleImage( $dst_w * $sample_factor, $dst_h * $sample_factor ); |
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} |
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} |
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|
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/* |
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* Use resizeImage() when it's available and a valid filter value is set. |
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* Otherwise, fall back to the scaleImage() method for resizing, which |
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* results in better image quality over resizeImage() with default filter |
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* settings and retains backward compatibility with pre 4.5 functionality. |
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*/ |
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if ( is_callable( array( $this->image, 'resizeImage' ) ) && $filter ) { |
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$this->image->setOption( 'filter:support', '2.0' ); |
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$this->image->resizeImage( $dst_w, $dst_h, $filter, 1 ); |
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} else { |
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$this->image->scaleImage( $dst_w, $dst_h ); |
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} |
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|
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// Set appropriate quality settings after resizing. |
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if ( 'image/jpeg' == $this->mime_type ) { |
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if ( is_callable( array( $this->image, 'unsharpMaskImage' ) ) ) { |
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$this->image->unsharpMaskImage( 0.25, 0.25, 8, 0.065 ); |
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} |
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|
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$this->image->setOption( 'jpeg:fancy-upsampling', 'off' ); |
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} |
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if ( 'image/png' === $this->mime_type ) { |
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$this->image->setOption( 'png:compression-filter', '5' ); |
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$this->image->setOption( 'png:compression-level', '9' ); |
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$this->image->setOption( 'png:compression-strategy', '1' ); |
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$this->image->setOption( 'png:exclude-chunk', 'all' ); |
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} |
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|
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/* |
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* If alpha channel is not defined, set it opaque. |
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* |
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* Note that Imagick::getImageAlphaChannel() is only available if Imagick |
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* has been compiled against ImageMagick version 6.4.0 or newer. |
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*/ |
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if ( is_callable( array( $this->image, 'getImageAlphaChannel' ) ) |
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&& is_callable( array( $this->image, 'setImageAlphaChannel' ) ) |
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&& defined( 'Imagick::ALPHACHANNEL_UNDEFINED' ) |
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&& defined( 'Imagick::ALPHACHANNEL_OPAQUE' ) |
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) { |
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if ( $this->image->getImageAlphaChannel() === Imagick::ALPHACHANNEL_UNDEFINED ) { |
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$this->image->setImageAlphaChannel( Imagick::ALPHACHANNEL_OPAQUE ); |
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} |
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} |
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|
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// Limit the bit depth of resized images to 8 bits per channel. |
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if ( is_callable( array( $this->image, 'getImageDepth' ) ) && is_callable( array( $this->image, 'setImageDepth' ) ) ) { |
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if ( 8 < $this->image->getImageDepth() ) { |
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$this->image->setImageDepth( 8 ); |
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} |
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} |
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|
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if ( is_callable( array( $this->image, 'setInterlaceScheme' ) ) && defined( 'Imagick::INTERLACE_NO' ) ) { |
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$this->image->setInterlaceScheme( Imagick::INTERLACE_NO ); |
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} |
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|
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} |
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catch ( Exception $e ) { |
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return new WP_Error( 'image_resize_error', $e->getMessage() ); |
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} |
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} |
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|
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/** |
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* Resize multiple images from a single source. |
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* |
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* @since 3.5.0 |
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* |
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* @param array $sizes { |
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* An array of image size arrays. Default sizes are 'small', 'medium', 'medium_large', 'large'. |
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* |
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* Either a height or width must be provided. |
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* If one of the two is set to null, the resize will |
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* maintain aspect ratio according to the provided dimension. |
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* |
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* @type array $size { |
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* Array of height, width values, and whether to crop. |
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* |
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* @type int $width Image width. Optional if `$height` is specified. |
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* @type int $height Image height. Optional if `$width` is specified. |
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* @type bool $crop Optional. Whether to crop the image. Default false. |
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* } |
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* } |
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* @return array An array of resized images' metadata by size. |
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*/ |
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public function multi_resize( $sizes ) { |
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$metadata = array(); |
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$orig_size = $this->size; |
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$orig_image = $this->image->getImage(); |
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|
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foreach ( $sizes as $size => $size_data ) { |
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if ( ! $this->image ) |
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$this->image = $orig_image->getImage(); |
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|
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if ( ! isset( $size_data['width'] ) && ! isset( $size_data['height'] ) ) { |
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continue; |
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} |
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|
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if ( ! isset( $size_data['width'] ) ) { |
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$size_data['width'] = null; |
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} |
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if ( ! isset( $size_data['height'] ) ) { |
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$size_data['height'] = null; |
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} |
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|
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if ( ! isset( $size_data['crop'] ) ) { |
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$size_data['crop'] = false; |
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} |
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|
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$resize_result = $this->resize( $size_data['width'], $size_data['height'], $size_data['crop'] ); |
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$duplicate = ( ( $orig_size['width'] == $size_data['width'] ) && ( $orig_size['height'] == $size_data['height'] ) ); |
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|
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if ( ! is_wp_error( $resize_result ) && ! $duplicate ) { |
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$resized = $this->_save( $this->image ); |
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|
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$this->image->clear(); |
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$this->image->destroy(); |
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$this->image = null; |
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|
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if ( ! is_wp_error( $resized ) && $resized ) { |
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unset( $resized['path'] ); |
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$metadata[$size] = $resized; |
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} |
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} |
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$this->size = $orig_size; |
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} |
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$this->image = $orig_image; |
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return $metadata; |
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} |
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|
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/** |
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* Crops Image. |
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* |
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* @since 3.5.0 |
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* |
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* @param int $src_x The start x position to crop from. |
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* @param int $src_y The start y position to crop from. |
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* @param int $src_w The width to crop. |
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* @param int $src_h The height to crop. |
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* @param int $dst_w Optional. The destination width. |
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* @param int $dst_h Optional. The destination height. |
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* @param bool $src_abs Optional. If the source crop points are absolute. |
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* @return bool|WP_Error |
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*/ |
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public function crop( $src_x, $src_y, $src_w, $src_h, $dst_w = null, $dst_h = null, $src_abs = false ) { |
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if ( $src_abs ) { |
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$src_w -= $src_x; |
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$src_h -= $src_y; |
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} |
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|
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try { |
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$this->image->cropImage( $src_w, $src_h, $src_x, $src_y ); |
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$this->image->setImagePage( $src_w, $src_h, 0, 0); |
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|
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if ( $dst_w || $dst_h ) { |
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// If destination width/height isn't specified, use same as |
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// width/height from source. |
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if ( ! $dst_w ) |
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$dst_w = $src_w; |
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if ( ! $dst_h ) |
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$dst_h = $src_h; |
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|
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$thumb_result = $this->thumbnail_image( $dst_w, $dst_h ); |
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if ( is_wp_error( $thumb_result ) ) { |
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return $thumb_result; |
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} |
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|
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return $this->update_size(); |
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} |
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} |
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catch ( Exception $e ) { |
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return new WP_Error( 'image_crop_error', $e->getMessage() ); |
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} |
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return $this->update_size(); |
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} |
|
|
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/** |
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* Rotates current image counter-clockwise by $angle. |
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* |
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* @since 3.5.0 |
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* |
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* @param float $angle |
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* @return true|WP_Error |
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*/ |
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public function rotate( $angle ) { |
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/** |
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* $angle is 360-$angle because Imagick rotates clockwise |
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* (GD rotates counter-clockwise) |
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*/ |
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try { |
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$this->image->rotateImage( new ImagickPixel('none'), 360-$angle ); |
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|
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// Normalise Exif orientation data so that display is consistent across devices. |
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if ( is_callable( array( $this->image, 'setImageOrientation' ) ) && defined( 'Imagick::ORIENTATION_TOPLEFT' ) ) { |
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$this->image->setImageOrientation( Imagick::ORIENTATION_TOPLEFT ); |
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} |
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|
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// Since this changes the dimensions of the image, update the size. |
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$result = $this->update_size(); |
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if ( is_wp_error( $result ) ) |
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return $result; |
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|
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$this->image->setImagePage( $this->size['width'], $this->size['height'], 0, 0 ); |
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} |
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catch ( Exception $e ) { |
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return new WP_Error( 'image_rotate_error', $e->getMessage() ); |
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} |
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return true; |
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} |
|
|
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/** |
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* Flips current image. |
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* |
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* @since 3.5.0 |
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* |
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* @param bool $horz Flip along Horizontal Axis |
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* @param bool $vert Flip along Vertical Axis |
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* @return true|WP_Error |
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*/ |
|
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 wp-includes/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 ); |
|
} |
|
} |
|
|
|
}
|
|
|