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5cdb46c16a
To improve performance, directly load the first page of uploaded PDFs to reduce the total clock time necessary to generate thumbnails. Props dglingren, lukecavanagh, helen, johnbillion, mikeschroder. See #38522. Built from https://develop.svn.wordpress.org/trunk@39187 git-svn-id: http://core.svn.wordpress.org/trunk@39127 1a063a9b-81f0-0310-95a4-ce76da25c4cd
747 lines
21 KiB
PHP
747 lines
21 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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/**
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* Imagick object.
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*
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* @access protected
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* @var Imagick
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*/
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protected $image;
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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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* 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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* @access public
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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( $args = array() ) {
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// First, test Imagick's extension and classes.
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if ( ! extension_loaded( 'imagick' ) || ! class_exists( 'Imagick', false ) || ! class_exists( 'ImagickPixel', false ) )
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return false;
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if ( version_compare( phpversion( 'imagick' ), '2.2.0', '<' ) )
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return false;
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$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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'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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// 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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$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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// 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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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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*
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* @static
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* @access public
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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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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 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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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?'), $this->file );
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/*
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* Even though Imagick uses less PHP memory than GD, set higher limit
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* for users that have low PHP.ini limits.
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*/
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wp_raise_memory_limit( 'image' );
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try {
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$this->image = new Imagick();
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$file_parts = pathinfo( $this->file );
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$filename = $this->file;
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// By default, PDFs are rendered in a very low resolution.
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// We want the thumbnail to be readable, so increase the rendering dpi.
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if ( 'pdf' == strtolower( $file_parts['extension'] ) ) {
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$this->image->setResolution( 128, 128 );
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// Only load the first page.
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$filename .= '[0]';
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}
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// Reading image after Imagick instantiation because `setResolution`
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// only applies correctly before the image is read.
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$this->image->readImage( $filename );
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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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}
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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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* @access public
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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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* @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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* @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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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 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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if ( $crop ) {
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return $this->crop( $src_x, $src_y, $src_w, $src_h, $dst_w, $dst_h );
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}
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// Execute the resize
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$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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return $this->update_size( $dst_w, $dst_h );
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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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* @access protected
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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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* 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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* 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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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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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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* 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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// 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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$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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* 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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// 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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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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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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* @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', '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
|
|
* 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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}
|
|
|
|
if ( ! isset( $size_data['width'] ) ) {
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$size_data['width'] = null;
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}
|
|
if ( ! isset( $size_data['height'] ) ) {
|
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$size_data['height'] = null;
|
|
}
|
|
|
|
if ( ! isset( $size_data['crop'] ) ) {
|
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$size_data['crop'] = false;
|
|
}
|
|
|
|
$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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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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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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|
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return $metadata;
|
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}
|
|
|
|
/**
|
|
* Crops Image.
|
|
*
|
|
* @since 3.5.0
|
|
* @access public
|
|
*
|
|
* @param int $src_x The start x position to crop from.
|
|
* @param int $src_y The start y position to crop from.
|
|
* @param int $src_w The width to crop.
|
|
* @param int $src_h The height to crop.
|
|
* @param int $dst_w Optional. The destination width.
|
|
* @param int $dst_h Optional. The destination height.
|
|
* @param bool $src_abs Optional. If the source crop points are absolute.
|
|
* @return bool|WP_Error
|
|
*/
|
|
public function crop( $src_x, $src_y, $src_w, $src_h, $dst_w = null, $dst_h = null, $src_abs = false ) {
|
|
if ( $src_abs ) {
|
|
$src_w -= $src_x;
|
|
$src_h -= $src_y;
|
|
}
|
|
|
|
try {
|
|
$this->image->cropImage( $src_w, $src_h, $src_x, $src_y );
|
|
$this->image->setImagePage( $src_w, $src_h, 0, 0);
|
|
|
|
if ( $dst_w || $dst_h ) {
|
|
// If destination width/height isn't specified, use same as
|
|
// width/height from source.
|
|
if ( ! $dst_w )
|
|
$dst_w = $src_w;
|
|
if ( ! $dst_h )
|
|
$dst_h = $src_h;
|
|
|
|
$thumb_result = $this->thumbnail_image( $dst_w, $dst_h );
|
|
if ( is_wp_error( $thumb_result ) ) {
|
|
return $thumb_result;
|
|
}
|
|
|
|
return $this->update_size();
|
|
}
|
|
}
|
|
catch ( Exception $e ) {
|
|
return new WP_Error( 'image_crop_error', $e->getMessage() );
|
|
}
|
|
return $this->update_size();
|
|
}
|
|
|
|
/**
|
|
* Rotates current image counter-clockwise by $angle.
|
|
*
|
|
* @since 3.5.0
|
|
* @access public
|
|
*
|
|
* @param float $angle
|
|
* @return true|WP_Error
|
|
*/
|
|
public function rotate( $angle ) {
|
|
/**
|
|
* $angle is 360-$angle because Imagick rotates clockwise
|
|
* (GD rotates counter-clockwise)
|
|
*/
|
|
try {
|
|
$this->image->rotateImage( new ImagickPixel('none'), 360-$angle );
|
|
|
|
// Since this changes the dimensions of the image, update the size.
|
|
$result = $this->update_size();
|
|
if ( is_wp_error( $result ) )
|
|
return $result;
|
|
|
|
$this->image->setImagePage( $this->size['width'], $this->size['height'], 0, 0 );
|
|
}
|
|
catch ( Exception $e ) {
|
|
return new WP_Error( 'image_rotate_error', $e->getMessage() );
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Flips current image.
|
|
*
|
|
* @since 3.5.0
|
|
* @access public
|
|
*
|
|
* @param bool $horz Flip along Horizontal Axis
|
|
* @param bool $vert Flip along Vertical Axis
|
|
* @return true|WP_Error
|
|
*/
|
|
public function flip( $horz, $vert ) {
|
|
try {
|
|
if ( $horz )
|
|
$this->image->flipImage();
|
|
|
|
if ( $vert )
|
|
$this->image->flopImage();
|
|
}
|
|
catch ( Exception $e ) {
|
|
return new WP_Error( 'image_flip_error', $e->getMessage() );
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Saves current image to file.
|
|
*
|
|
* @since 3.5.0
|
|
* @access public
|
|
*
|
|
* @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
|
|
* @access public
|
|
*
|
|
* @param string $mime_type
|
|
* @return true|WP_Error
|
|
*/
|
|
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
|
|
* @access protected
|
|
*
|
|
* @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;
|
|
}
|
|
|
|
}
|