512 lines
13 KiB
PHP
512 lines
13 KiB
PHP
<?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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* 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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* @package WordPress
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* @subpackage Image_Editor
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* @uses WP_Image_Editor Extends class
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*/
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class WP_Image_Editor_Imagick extends WP_Image_Editor {
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protected $image = null; // Imagick Object
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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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* 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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* @access public
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*
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* @return boolean
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*/
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public static function test( $args = array() ) {
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// First, test Imagick's extension and classes.
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if ( ! extension_loaded( 'imagick' ) || ! class_exists( 'Imagick' ) || ! class_exists( 'ImagickPixel' ) )
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return false;
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if ( version_compare( phpversion( 'imagick' ), '2.2.0', '<' ) )
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return false;
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$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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'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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);
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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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if ( array_diff( $required_methods, get_class_methods( 'Imagick' ) ) )
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return false;
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return true;
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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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* @access public
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*
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* @param string $mime_type
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* @return boolean
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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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if ( ! $imagick_extension )
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return false;
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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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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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* 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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* @access protected
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*
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* @return boolean|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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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?'), $this->file );
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/** This filter is documented in wp-includes/class-wp-image-editor-imagick.php */
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// Even though Imagick uses less PHP memory than GD, set higher limit for users that have low PHP.ini limits
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@ini_set( 'memory_limit', apply_filters( 'image_memory_limit', WP_MAX_MEMORY_LIMIT ) );
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try {
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$this->image = new Imagick( $this->file );
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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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// 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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$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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return $this->set_quality( $this->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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* @access public
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*
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* @param int $quality Compression Quality. Range: [1,100]
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* @return boolean|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->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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* @access protected
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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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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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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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* @access public
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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 boolean $crop
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* @return boolean|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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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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try {
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/**
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* @TODO: Thumbnail is more efficient, given a newer version of Imagemagick.
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* $this->image->thumbnailImage( $dst_w, $dst_h );
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*/
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$this->image->scaleImage( $dst_w, $dst_h );
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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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return $this->update_size( $dst_w, $dst_h );
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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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* @access public
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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', '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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* @type int ['width'] Optional. Image width.
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* @type int ['height'] Optional. Image height.
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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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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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if ( ! isset( $size_data['width'] ) && ! isset( $size_data['height'] ) ) {
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continue;
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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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if ( ! isset( $size_data['crop'] ) ) {
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$size_data['crop'] = false;
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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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if( ! is_wp_error( $resize_result ) ) {
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$resized = $this->_save( $this->image );
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$this->image->clear();
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$this->image->destroy();
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$this->image = null;
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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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* Crops Image.
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*
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* @since 3.5.0
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* @access public
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*
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* @param string|int $src The source file or Attachment ID.
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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 boolean $src_abs Optional. If the source crop points are absolute.
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* @return boolean|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 -= $src_y;
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}
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try {
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$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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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 = $src_h;
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$this->image->scaleImage( $dst_w, $dst_h );
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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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* @access public
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*
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* @param float $angle
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* @return boolean|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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// 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 $result;
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$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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* @access public
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*
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* @param boolean $horz Flip along Horizontal Axis
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* @param boolean $vert Flip along Vertical Axis
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* @returns boolean|WP_Error
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*/
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public function flip( $horz, $vert ) {
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try {
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if ( $horz )
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$this->image->flipImage();
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if ( $vert )
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$this->image->flopImage();
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}
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catch ( Exception $e ) {
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return new WP_Error( 'image_flip_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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* Saves current image to file.
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*
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* @since 3.5.0
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* @access public
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*
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* @param string $destfilename
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* @param string $mime_type
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* @return array|WP_Error {'path'=>string, 'file'=>string, 'width'=>int, 'height'=>int, 'mime-type'=>string}
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*/
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public function save( $destfilename = null, $mime_type = null ) {
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$saved = $this->_save( $this->image, $destfilename, $mime_type );
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if ( ! is_wp_error( $saved ) ) {
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$this->file = $saved['path'];
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$this->mime_type = $saved['mime-type'];
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try {
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$this->image->setImageFormat( strtoupper( $this->get_extension( $this->mime_type ) ) );
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}
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catch ( Exception $e ) {
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return new WP_Error( 'image_save_error', $e->getMessage(), $this->file );
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}
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}
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return $saved;
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}
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protected function _save( $image, $filename = null, $mime_type = null ) {
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list( $filename, $extension, $mime_type ) = $this->get_output_format( $filename, $mime_type );
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if ( ! $filename )
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$filename = $this->generate_filename( null, null, $extension );
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try {
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// Store initial Format
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$orig_format = $this->image->getImageFormat();
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$this->image->setImageFormat( strtoupper( $this->get_extension( $mime_type ) ) );
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$this->make_image( $filename, array( $image, 'writeImage' ), array( $filename ) );
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// Reset original Format
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$this->image->setImageFormat( $orig_format );
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}
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catch ( Exception $e ) {
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return new WP_Error( 'image_save_error', $e->getMessage(), $filename );
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}
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// Set correct file permissions
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$stat = stat( dirname( $filename ) );
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$perms = $stat['mode'] & 0000666; //same permissions as parent folder, strip off the executable bits
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@ chmod( $filename, $perms );
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/** This filter is documented in wp-includes/class-wp-image-editor-gd.php */
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return array(
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'path' => $filename,
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'file' => wp_basename( apply_filters( 'image_make_intermediate_size', $filename ) ),
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'width' => $this->size['width'],
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'height' => $this->size['height'],
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'mime-type' => $mime_type,
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);
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}
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/**
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* Streams current image to browser.
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*
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* @since 3.5.0
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* @access public
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*
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* @param string $mime_type
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* @return boolean|WP_Error
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*/
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public function stream( $mime_type = null ) {
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list( $filename, $extension, $mime_type ) = $this->get_output_format( null, $mime_type );
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try {
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// Temporarily change format for stream
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$this->image->setImageFormat( strtoupper( $extension ) );
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// Output stream of image content
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header( "Content-Type: $mime_type" );
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print $this->image->getImageBlob();
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// Reset Image to original Format
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$this->image->setImageFormat( $this->get_extension( $this->mime_type ) );
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}
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catch ( Exception $e ) {
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return new WP_Error( 'image_stream_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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