<?php
/**
* WordPress Imagick Image Editor
*
* @package WordPress
* @subpackage Image_Editor
*/
/**
* WordPress Image Editor Class for Image Manipulation through Imagick PHP Module
*
* @since 3.5.0
*
* @see WP_Image_Editor
*/
class WP_Image_Editor_Imagick extends WP_Image_Editor {
/**
* Imagick object.
*
* @var Imagick
*/
protected $image;
public function __destruct() {
if ( $this->image instanceof Imagick ) {
// We don't need the original in memory anymore.
$this->image->clear();
$this->image->destroy();
}
}
/**
* Checks to see if current environment supports Imagick.
*
* We require Imagick 2.2.0 or greater, based on whether the queryFormats()
* method can be called statically.
*
* @since 3.5.0
*
* @param array $args
* @return bool
*/
public static function test( $args = array() ) {
// First, test Imagick's extension and classes.
if ( ! extension_loaded( 'imagick' ) || ! class_exists( 'Imagick', false ) || ! class_exists( 'ImagickPixel', false ) ) {
return false;
}
if ( version_compare( phpversion( 'imagick' ), '2.2.0', '<' ) ) {
return false;
}
$required_methods = array(
'clear',
'destroy',
'valid',
'getimage',
'writeimage',
'getimageblob',
'getimagegeometry',
'getimageformat',
'setimageformat',
'setimagecompression',
'setimagecompressionquality',
'setimagepage',
'setoption',
'scaleimage',
'cropimage',
'rotateimage',
'flipimage',
'flopimage',
'readimage',
'readimageblob',
);
// Now, test for deep requirements within Imagick.
if ( ! defined( 'imagick::COMPRESSION_JPEG' ) ) {
return false;
}
$class_methods = array_map( 'strtolower', get_class_methods( 'Imagick' ) );
if ( array_diff( $required_methods, $class_methods ) ) {
return false;
}
return true;
}
/**
* Checks to see if editor supports the mime-type specified.
*
* @since 3.5.0
*
* @param string $mime_type
* @return bool
*/
public static function supports_mime_type( $mime_type ) {
$imagick_extension = strtoupper( self::get_extension( $mime_type ) );
if ( ! $imagick_extension ) {
return false;
}
/*
* setIteratorIndex is optional unless mime is an animated format.
* Here, we just say no if you are missing it and aren't loading a jpeg.
*/
if ( ! method_exists( 'Imagick', 'setIteratorIndex' ) && 'image/jpeg' !== $mime_type ) {
return false;
}
try {
// phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged
return ( (bool) @Imagick::queryFormats( $imagick_extension ) );
} catch ( Exception $e ) {
return false;
}
}
/**
* Loads image from $this->file into new Imagick Object.
*
* @since 3.5.0
*
* @return true|WP_Error True if loaded; WP_Error on failure.
*/
public function load() {
if ( $this->image instanceof Imagick ) {
return true;
}
if ( ! is_file( $this->file ) && ! wp_is_stream( $this->file ) ) {
return new WP_Error( 'error_loading_image', __( 'File does not exist?' ), $this->file );
}
/*
* Even though Imagick uses less PHP memory than GD, set higher limit
* for users that have low PHP.ini limits.
*/
wp_raise_memory_limit( 'image' );
try {
$this->image = new Imagick();
$file_extension = strtolower( pathinfo( $this->file, PATHINFO_EXTENSION ) );
if ( 'pdf' === $file_extension ) {
$pdf_loaded = $this->pdf_load_source();
if ( is_wp_error( $pdf_loaded ) ) {
return $pdf_loaded;
}
} else {
if ( wp_is_stream( $this->file ) ) {
// Due to reports of issues with streams with `Imagick::readImageFile()`, uses `Imagick::readImageBlob()` instead.
$this->image->readImageBlob( file_get_contents( $this->file ), $this->file );
} else {
$this->image->readImage( $this->file );
}
}
if ( ! $this->image->valid() ) {
return new WP_Error( 'invalid_image', __( 'File is not an image.' ), $this->file );
}
// Select the first frame to handle animated images properly.
if ( is_callable( array( $this->image, 'setIteratorIndex' ) ) ) {
$this->image->setIteratorIndex( 0 );
}
if ( 'pdf' === $file_extension ) {
$this->remove_pdf_alpha_channel();
}
$this->mime_type = $this->get_mime_type( $this->image->getImageFormat() );
} catch ( Exception $e ) {
return new WP_Error( 'invalid_image', $e->getMessage(), $this->file );
}
$updated_size = $this->update_size();
if ( is_wp_error( $updated_size ) ) {
return $updated_size;
}
return $this->set_quality();
}
/**
* Sets Image Compression quality on a 1-100% scale.
*
* @since 3.5.0
*
* @param int $quality Compression Quality. Range: [1,100]
* @return true|WP_Error True if set successfully; WP_Error on failure.
*/
public function set_quality( $quality = null ) {
$quality_result = parent::set_quality( $quality );
if ( is_wp_error( $quality_result ) ) {
return $quality_result;
} else {
$quality = $this->get_quality();
}
try {
switch ( $this->mime_type ) {
case 'image/jpeg':
$this->image->setImageCompressionQuality( $quality );
$this->image->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 $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'];
}
/*
* 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