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4b60af1a6a
“The WordPress open source community cares about diversity. We strive to maintain a welcoming environment where everyone can feel included.” With this commit, all occurrences of “whitelist” and “blacklist” (with the single exception of the `$new_whitelist_options` global variable) are removed. A new ticket has been opened to explore renaming the `$new_whitelist_options` variable (#50434). Changing to more specific names or rewording sentences containing these terms not only makes the code more inclusive, but also helps provide clarity. These terms are often ambiguous. What is being blocked or allowed is not always immediately clear. This can make it more difficult for non-native English speakers to read through the codebase. Words matter. If one contributor feels more welcome because these terms are removed, this was worth the effort. Props strangerstudios, jorbin, desrosj, joemcgill, timothyblynjacobs, ocean90, ayeshrajans, davidbaumwald, earnjam. See #48900, #50434. Fixes #50413. Built from https://develop.svn.wordpress.org/trunk@48121 git-svn-id: http://core.svn.wordpress.org/trunk@47890 1a063a9b-81f0-0310-95a4-ce76da25c4cd
808 lines
23 KiB
PHP
808 lines
23 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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*
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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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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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* @param array $args
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* @return bool
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*/
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public static function test( $args = array() ) {
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// First, test Imagick's extension and classes.
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if ( ! extension_loaded( 'imagick' ) || ! class_exists( 'Imagick', false ) || ! class_exists( 'ImagickPixel', false ) ) {
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return false;
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}
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if ( version_compare( phpversion( 'imagick' ), '2.2.0', '<' ) ) {
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return false;
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}
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$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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// 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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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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* @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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}
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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' ) && 'image/jpeg' !== $mime_type ) {
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return false;
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}
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try {
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// phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged
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return ( (bool) @Imagick::queryFormats( $imagick_extension ) );
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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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*
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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?' ), $this->file );
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}
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/*
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* Even though Imagick uses less PHP memory than GD, set higher limit
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* for users that have low PHP.ini limits.
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*/
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wp_raise_memory_limit( 'image' );
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try {
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$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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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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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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} 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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*
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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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} else {
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$this->image->setImageCompressionQuality( $quality );
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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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* @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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} 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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}
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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'] == $max_h ) ) {
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return true;
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}
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$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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}
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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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*
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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 the allowed list and the related
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* Imagick constant is defined or fall back to the default filter.
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*/
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if ( in_array( $filter_name, $allowed_filters, true ) && 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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} 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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* Create multiple smaller images from a single source.
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*
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* Attempts to create all sub-sizes and returns the meta data at the end. This
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* may result in the server running out of resources. When it fails there may be few
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* "orphaned" images left over as the meta data is never returned and saved.
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*
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* As of 5.3.0 the preferred way to do this is with `make_subsize()`. It creates
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* the new images one at a time and allows for the meta data to be saved after
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* each new image is created.
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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 data arrays.
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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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foreach ( $sizes as $size => $size_data ) {
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$meta = $this->make_subsize( $size_data );
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if ( ! is_wp_error( $meta ) ) {
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$metadata[ $size ] = $meta;
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}
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}
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return $metadata;
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}
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/**
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* Create an image sub-size and return the image meta data value for it.
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*
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* @since 5.3.0
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*
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* @param array $size_data {
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* Array of size data.
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*
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* @type int $width The maximum width in pixels.
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* @type int $height The maximum height in pixels.
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* @type bool $crop Whether to crop the image to exact dimensions.
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* }
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* @return array|WP_Error The image data array for inclusion in the `sizes` array in the image meta,
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* WP_Error object on error.
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*/
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public function make_subsize( $size_data ) {
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if ( ! isset( $size_data['width'] ) && ! isset( $size_data['height'] ) ) {
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return new WP_Error( 'image_subsize_create_error', __( 'Cannot resize the image. Both width and height are not set.' ) );
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}
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$orig_size = $this->size;
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$orig_image = $this->image->getImage();
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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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|
$resized = $this->resize( $size_data['width'], $size_data['height'], $size_data['crop'] );
|
|
|
|
if ( is_wp_error( $resized ) ) {
|
|
$saved = $resized;
|
|
} else {
|
|
$saved = $this->_save( $this->image );
|
|
|
|
$this->image->clear();
|
|
$this->image->destroy();
|
|
$this->image = null;
|
|
}
|
|
|
|
$this->size = $orig_size;
|
|
$this->image = $orig_image;
|
|
|
|
if ( ! is_wp_error( $saved ) ) {
|
|
unset( $saved['path'] );
|
|
}
|
|
|
|
return $saved;
|
|
}
|
|
|
|
/**
|
|
* Crops Image.
|
|
*
|
|
* @since 3.5.0
|
|
*
|
|
* @param int $src_x The start x position to crop from.
|
|
* @param int $src_y The start y position to crop from.
|
|
* @param int $src_w The width to crop.
|
|
* @param int $src_h The height to crop.
|
|
* @param int $dst_w Optional. The destination width.
|
|
* @param int $dst_h Optional. The destination height.
|
|
* @param bool $src_abs Optional. If the source crop points are absolute.
|
|
* @return bool|WP_Error
|
|
*/
|
|
public function crop( $src_x, $src_y, $src_w, $src_h, $dst_w = null, $dst_h = null, $src_abs = false ) {
|
|
if ( $src_abs ) {
|
|
$src_w -= $src_x;
|
|
$src_h -= $src_y;
|
|
}
|
|
|
|
try {
|
|
$this->image->cropImage( $src_w, $src_h, $src_x, $src_y );
|
|
$this->image->setImagePage( $src_w, $src_h, 0, 0 );
|
|
|
|
if ( $dst_w || $dst_h ) {
|
|
// If destination width/height isn't specified,
|
|
// use same as width/height from source.
|
|
if ( ! $dst_w ) {
|
|
$dst_w = $src_w;
|
|
}
|
|
if ( ! $dst_h ) {
|
|
$dst_h = $src_h;
|
|
}
|
|
|
|
$thumb_result = $this->thumbnail_image( $dst_w, $dst_h );
|
|
if ( is_wp_error( $thumb_result ) ) {
|
|
return $thumb_result;
|
|
}
|
|
|
|
return $this->update_size();
|
|
}
|
|
} catch ( Exception $e ) {
|
|
return new WP_Error( 'image_crop_error', $e->getMessage() );
|
|
}
|
|
return $this->update_size();
|
|
}
|
|
|
|
/**
|
|
* Rotates current image counter-clockwise by $angle.
|
|
*
|
|
* @since 3.5.0
|
|
*
|
|
* @param float $angle
|
|
* @return true|WP_Error
|
|
*/
|
|
public function rotate( $angle ) {
|
|
/**
|
|
* $angle is 360-$angle because Imagick rotates clockwise
|
|
* (GD rotates counter-clockwise)
|
|
*/
|
|
try {
|
|
$this->image->rotateImage( new ImagickPixel( 'none' ), 360 - $angle );
|
|
|
|
// Normalise EXIF orientation data so that display is consistent across devices.
|
|
if ( is_callable( array( $this->image, 'setImageOrientation' ) ) && defined( 'Imagick::ORIENTATION_TOPLEFT' ) ) {
|
|
$this->image->setImageOrientation( Imagick::ORIENTATION_TOPLEFT );
|
|
}
|
|
|
|
// Since this changes the dimensions of the image, update the size.
|
|
$result = $this->update_size();
|
|
if ( is_wp_error( $result ) ) {
|
|
return $result;
|
|
}
|
|
|
|
$this->image->setImagePage( $this->size['width'], $this->size['height'], 0, 0 );
|
|
} catch ( Exception $e ) {
|
|
return new WP_Error( 'image_rotate_error', $e->getMessage() );
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Flips current image.
|
|
*
|
|
* @since 3.5.0
|
|
*
|
|
* @param bool $horz Flip along Horizontal Axis
|
|
* @param bool $vert Flip along Vertical Axis
|
|
* @return true|WP_Error
|
|
*/
|
|
public function flip( $horz, $vert ) {
|
|
try {
|
|
if ( $horz ) {
|
|
$this->image->flipImage();
|
|
}
|
|
|
|
if ( $vert ) {
|
|
$this->image->flopImage();
|
|
}
|
|
|
|
// Normalise EXIF orientation data so that display is consistent across devices.
|
|
if ( is_callable( array( $this->image, 'setImageOrientation' ) ) && defined( 'Imagick::ORIENTATION_TOPLEFT' ) ) {
|
|
$this->image->setImageOrientation( Imagick::ORIENTATION_TOPLEFT );
|
|
}
|
|
} catch ( Exception $e ) {
|
|
return new WP_Error( 'image_flip_error', $e->getMessage() );
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Check if a JPEG image has EXIF Orientation tag and rotate it if needed.
|
|
*
|
|
* As ImageMagick copies the EXIF data to the flipped/rotated image, proceed only
|
|
* if EXIF Orientation can be reset afterwards.
|
|
*
|
|
* @since 5.3.0
|
|
*
|
|
* @return bool|WP_Error True if the image was rotated. False if no EXIF data or if the image doesn't need rotation.
|
|
* WP_Error if error while rotating.
|
|
*/
|
|
public function maybe_exif_rotate() {
|
|
if ( is_callable( array( $this->image, 'setImageOrientation' ) ) && defined( 'Imagick::ORIENTATION_TOPLEFT' ) ) {
|
|
return parent::maybe_exif_rotate();
|
|
} else {
|
|
return new WP_Error( 'write_exif_error', __( 'The image cannot be rotated because the embedded meta data cannot be updated.' ) );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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 );
|
|
|
|
return array(
|
|
'path' => $filename,
|
|
/** This filter is documented in wp-includes/class-wp-image-editor-gd.php */
|
|
'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, true ) ) {
|
|
$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 );
|
|
|
|
// When generating thumbnails from cropped PDF pages, Imagemagick uses the uncropped
|
|
// area (resulting in unnecessary whitespace) unless the following option is set.
|
|
$this->image->setOption( 'pdf:use-cropbox', true );
|
|
|
|
// Only load the first page.
|
|
return $this->file . '[0]';
|
|
} catch ( Exception $e ) {
|
|
return new WP_Error( 'pdf_setup_failed', $e->getMessage(), $this->file );
|
|
}
|
|
}
|
|
|
|
}
|