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0860bb2771
Prior to about 2013, many class methods lacked even access modifiers which made the `@access` notations that much more useful. Now that we've gotten to a point where the codebase is more mature from a maintenance perspective and we can finally remove these notations. Notable exceptions to this change include standalone functions notated as private as well as some classes still considered to represent "private" APIs. See #41452. Built from https://develop.svn.wordpress.org/trunk@41162 git-svn-id: http://core.svn.wordpress.org/trunk@41002 1a063a9b-81f0-0310-95a4-ce76da25c4cd
468 lines
13 KiB
PHP
468 lines
13 KiB
PHP
<?php
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/**
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* WordPress GD 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 GD
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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_GD extends WP_Image_Editor {
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/**
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* GD Resource.
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*
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* @var resource
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*/
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protected $image;
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public function __destruct() {
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if ( $this->image ) {
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// we don't need the original in memory anymore
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imagedestroy( $this->image );
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}
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}
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/**
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* Checks to see if current environment supports GD.
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*
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* @since 3.5.0
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*
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* @static
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*
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* @param array $args
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* @return bool
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*/
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public static function test( $args = array() ) {
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if ( ! extension_loaded('gd') || ! function_exists('gd_info') )
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return false;
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// On some setups GD library does not provide imagerotate() - Ticket #11536
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if ( isset( $args['methods'] ) &&
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in_array( 'rotate', $args['methods'] ) &&
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! function_exists('imagerotate') ){
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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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*
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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( $mime_type ) {
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$image_types = imagetypes();
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switch( $mime_type ) {
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case 'image/jpeg':
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return ($image_types & IMG_JPG) != 0;
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case 'image/png':
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return ($image_types & IMG_PNG) != 0;
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case 'image/gif':
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return ($image_types & IMG_GIF) != 0;
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}
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return false;
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}
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/**
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* Loads image from $this->file into new GD Resource.
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*
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* @since 3.5.0
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*
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* @return bool|WP_Error True if loaded successfully; WP_Error on failure.
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*/
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public function load() {
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if ( $this->image )
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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?'), $this->file );
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// Set artificially high because GD uses uncompressed images in memory.
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wp_raise_memory_limit( 'image' );
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$this->image = @imagecreatefromstring( file_get_contents( $this->file ) );
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if ( ! is_resource( $this->image ) )
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return new WP_Error( 'invalid_image', __('File is not an image.'), $this->file );
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$size = @getimagesize( $this->file );
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if ( ! $size )
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return new WP_Error( 'invalid_image', __('Could not read image size.'), $this->file );
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if ( function_exists( 'imagealphablending' ) && function_exists( 'imagesavealpha' ) ) {
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imagealphablending( $this->image, false );
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imagesavealpha( $this->image, true );
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}
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$this->update_size( $size[0], $size[1] );
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$this->mime_type = $size['mime'];
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return $this->set_quality();
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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
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*/
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protected function update_size( $width = false, $height = false ) {
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if ( ! $width )
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$width = imagesx( $this->image );
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if ( ! $height )
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$height = imagesy( $this->image );
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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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* Wraps _resize, since _resize returns a GD Resource.
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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 true|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'] == $max_h ) )
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return true;
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$resized = $this->_resize( $max_w, $max_h, $crop );
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if ( is_resource( $resized ) ) {
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imagedestroy( $this->image );
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$this->image = $resized;
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return true;
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} elseif ( is_wp_error( $resized ) )
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return $resized;
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return new WP_Error( 'image_resize_error', __('Image resize failed.'), $this->file );
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}
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/**
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*
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* @param int $max_w
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* @param int $max_h
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* @param bool|array $crop
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* @return resource|WP_Error
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*/
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protected function _resize( $max_w, $max_h, $crop = false ) {
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$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'), $this->file );
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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 ) = $dims;
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$resized = wp_imagecreatetruecolor( $dst_w, $dst_h );
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imagecopyresampled( $resized, $this->image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h );
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if ( is_resource( $resized ) ) {
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$this->update_size( $dst_w, $dst_h );
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return $resized;
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}
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return new WP_Error( 'image_resize_error', __('Image resize failed.'), $this->file );
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}
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/**
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* Resize multiple images from a single source.
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*
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* @since 3.5.0
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*
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* @param array $sizes {
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* An array of image size arrays. Default sizes are 'small', 'medium', 'medium_large', 'large'.
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*
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* Either a height or width must be provided.
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* If one of the two is set to null, the resize will
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* maintain aspect ratio according to the provided dimension.
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*
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* @type array $size {
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* Array of height, width values, and whether to crop.
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*
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* @type int $width Image width. Optional if `$height` is specified.
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* @type int $height Image height. Optional if `$width` is specified.
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* @type bool $crop Optional. Whether to crop the image. Default false.
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* }
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* }
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* @return array An array of resized images' metadata by size.
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*/
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public function multi_resize( $sizes ) {
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$metadata = array();
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$orig_size = $this->size;
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foreach ( $sizes as $size => $size_data ) {
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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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$image = $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( $image ) && ! $duplicate ) {
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$resized = $this->_save( $image );
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imagedestroy( $image );
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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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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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*
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* @param int $src_x The start x position to crop from.
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* @param int $src_y The start y position to crop from.
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* @param int $src_w The width to crop.
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* @param int $src_h The height to crop.
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* @param int $dst_w Optional. The destination width.
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* @param int $dst_h Optional. The destination height.
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* @param bool $src_abs Optional. If the source crop points are absolute.
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* @return bool|WP_Error
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*/
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public function crop( $src_x, $src_y, $src_w, $src_h, $dst_w = null, $dst_h = null, $src_abs = false ) {
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// If 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 = $src_h;
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$dst = wp_imagecreatetruecolor( $dst_w, $dst_h );
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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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if ( function_exists( 'imageantialias' ) )
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imageantialias( $dst, true );
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imagecopyresampled( $dst, $this->image, 0, 0, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h );
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if ( is_resource( $dst ) ) {
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imagedestroy( $this->image );
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$this->image = $dst;
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$this->update_size();
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return true;
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}
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return new WP_Error( 'image_crop_error', __('Image crop failed.'), $this->file );
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}
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/**
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* Rotates current image counter-clockwise by $angle.
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* Ported from image-edit.php
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*
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* @since 3.5.0
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*
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* @param float $angle
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* @return true|WP_Error
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*/
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public function rotate( $angle ) {
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if ( function_exists('imagerotate') ) {
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$transparency = imagecolorallocatealpha( $this->image, 255, 255, 255, 127 );
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$rotated = imagerotate( $this->image, $angle, $transparency );
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if ( is_resource( $rotated ) ) {
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imagealphablending( $rotated, true );
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imagesavealpha( $rotated, true );
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imagedestroy( $this->image );
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$this->image = $rotated;
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$this->update_size();
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return true;
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}
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}
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return new WP_Error( 'image_rotate_error', __('Image rotate failed.'), $this->file );
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}
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/**
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* Flips current image.
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*
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* @since 3.5.0
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*
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* @param bool $horz Flip along Horizontal Axis
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* @param bool $vert Flip along Vertical Axis
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* @return true|WP_Error
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*/
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public function flip( $horz, $vert ) {
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$w = $this->size['width'];
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$h = $this->size['height'];
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$dst = wp_imagecreatetruecolor( $w, $h );
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if ( is_resource( $dst ) ) {
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$sx = $vert ? ($w - 1) : 0;
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$sy = $horz ? ($h - 1) : 0;
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$sw = $vert ? -$w : $w;
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$sh = $horz ? -$h : $h;
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if ( imagecopyresampled( $dst, $this->image, 0, 0, $sx, $sy, $w, $h, $sw, $sh ) ) {
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imagedestroy( $this->image );
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$this->image = $dst;
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return true;
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}
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}
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return new WP_Error( 'image_flip_error', __('Image flip failed.'), $this->file );
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}
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/**
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* Saves current in-memory image to file.
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*
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* @since 3.5.0
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*
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* @param string|null $filename
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* @param string|null $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( $filename = null, $mime_type = null ) {
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$saved = $this->_save( $this->image, $filename, $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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}
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return $saved;
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}
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/**
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* @param resource $image
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* @param string|null $filename
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* @param string|null $mime_type
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* @return WP_Error|array
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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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if ( 'image/gif' == $mime_type ) {
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if ( ! $this->make_image( $filename, 'imagegif', array( $image, $filename ) ) )
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return new WP_Error( 'image_save_error', __('Image Editor Save Failed') );
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}
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elseif ( 'image/png' == $mime_type ) {
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// convert from full colors to index colors, like original PNG.
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if ( function_exists('imageistruecolor') && ! imageistruecolor( $image ) )
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imagetruecolortopalette( $image, false, imagecolorstotal( $image ) );
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if ( ! $this->make_image( $filename, 'imagepng', array( $image, $filename ) ) )
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return new WP_Error( 'image_save_error', __('Image Editor Save Failed') );
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}
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elseif ( 'image/jpeg' == $mime_type ) {
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if ( ! $this->make_image( $filename, 'imagejpeg', array( $image, $filename, $this->get_quality() ) ) )
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return new WP_Error( 'image_save_error', __('Image Editor Save Failed') );
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}
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else {
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return new WP_Error( 'image_save_error', __('Image Editor Save Failed') );
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}
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// Set correct file permissions
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$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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/**
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* Filters the name of the saved image file.
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*
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* @since 2.6.0
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*
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* @param string $filename Name of the file.
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*/
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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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* Returns stream of current image.
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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 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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switch ( $mime_type ) {
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case 'image/png':
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header( 'Content-Type: image/png' );
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return imagepng( $this->image );
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case 'image/gif':
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header( 'Content-Type: image/gif' );
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return imagegif( $this->image );
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default:
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header( 'Content-Type: image/jpeg' );
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return imagejpeg( $this->image, null, $this->get_quality() );
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}
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}
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/**
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* Either calls editor's save function or handles file as a stream.
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*
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* @since 3.5.0
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*
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* @param string|stream $filename
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* @param callable $function
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* @param array $arguments
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* @return bool
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*/
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protected function make_image( $filename, $function, $arguments ) {
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if ( wp_is_stream( $filename ) )
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$arguments[1] = null;
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return parent::make_image( $filename, $function, $arguments );
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}
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}
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