590 lines
17 KiB
PHP
590 lines
17 KiB
PHP
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<?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|GdImage
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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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* @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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}
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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'], true ) &&
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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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* @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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case 'image/webp':
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return ( $image_types & IMG_WEBP ) != 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 true|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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}
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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 does not exist?' ), $this->file );
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}
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// Set artificially high because GD uses uncompressed images in memory.
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wp_raise_memory_limit( 'image' );
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$file_contents = @file_get_contents( $this->file );
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if ( ! $file_contents ) {
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return new WP_Error( 'error_loading_image', __( 'File does not exist?' ), $this->file );
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}
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// WebP may not work with imagecreatefromstring().
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if (
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function_exists( 'imagecreatefromwebp' ) &&
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( 'image/webp' === wp_get_image_mime( $this->file ) )
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) {
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$this->image = @imagecreatefromwebp( $this->file );
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} else {
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$this->image = @imagecreatefromstring( $file_contents );
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}
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if ( ! is_gd_image( $this->image ) ) {
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return new WP_Error( 'invalid_image', __( 'File is not an image.' ), $this->file );
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}
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$size = wp_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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}
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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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}
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if ( ! $height ) {
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$height = imagesy( $this->image );
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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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* Wraps `::_resize()` which returns a GD resource or GdImage instance.
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*
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* At minimum, either a height or width must be provided. If one of the two is set
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* to null, the resize will 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|array $crop {
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* Optional. Image cropping behavior. If false, the image will be scaled (default).
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* If true, image will be cropped to the specified dimensions using center positions.
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* If an array, the image will be cropped using the array to specify the crop location:
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*
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* @type string $0 The x crop position. Accepts 'left' 'center', or 'right'.
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* @type string $1 The y crop position. Accepts 'top', 'center', or 'bottom'.
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* }
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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'] == $max_h ) ) {
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return true;
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}
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$resized = $this->_resize( $max_w, $max_h, $crop );
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if ( is_gd_image( $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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}
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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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* @param int $max_w
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* @param int $max_h
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* @param bool|array $crop {
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* Optional. Image cropping behavior. If false, the image will be scaled (default).
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* If true, image will be cropped to the specified dimensions using center positions.
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* If an array, the image will be cropped using the array to specify the crop location:
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*
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* @type string $0 The x crop position. Accepts 'left' 'center', or 'right'.
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* @type string $1 The y crop position. Accepts 'top', 'center', or 'bottom'.
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* }
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* @return resource|GdImage|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_gd_image( $resized ) ) {
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$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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* 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 source image.
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*
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* @type array ...$0 {
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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|array $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|array $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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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'] );
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if ( is_wp_error( $resized ) ) {
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$saved = $resized;
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} else {
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$saved = $this->_save( $resized );
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imagedestroy( $resized );
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}
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$this->size = $orig_size;
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if ( ! is_wp_error( $saved ) ) {
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unset( $saved['path'] );
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}
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return $saved;
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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 true|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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/*
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* If destination width/height isn't specified,
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* use same as width/height from source.
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*/
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if ( ! $dst_w ) {
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$dst_w = $src_w;
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}
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if ( ! $dst_h ) {
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$dst_h = $src_h;
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}
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foreach ( array( $src_w, $src_h, $dst_w, $dst_h ) as $value ) {
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if ( ! is_numeric( $value ) || (int) $value <= 0 ) {
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return new WP_Error( 'image_crop_error', __( 'Image crop failed.' ), $this->file );
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}
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}
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$dst = wp_imagecreatetruecolor( (int) $dst_w, (int) $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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}
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imagecopyresampled( $dst, $this->image, 0, 0, (int) $src_x, (int) $src_y, (int) $dst_w, (int) $dst_h, (int) $src_w, (int) $src_h );
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if ( is_gd_image( $dst ) ) {
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|
|
imagedestroy( $this->image );
|
||
|
|
$this->image = $dst;
|
||
|
|
$this->update_size();
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
return new WP_Error( 'image_crop_error', __( 'Image crop failed.' ), $this->file );
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Rotates current image counter-clockwise by $angle.
|
||
|
|
* Ported from image-edit.php
|
||
|
|
*
|
||
|
|
* @since 3.5.0
|
||
|
|
*
|
||
|
|
* @param float $angle
|
||
|
|
* @return true|WP_Error
|
||
|
|
*/
|
||
|
|
public function rotate( $angle ) {
|
||
|
|
if ( function_exists( 'imagerotate' ) ) {
|
||
|
|
$transparency = imagecolorallocatealpha( $this->image, 255, 255, 255, 127 );
|
||
|
|
$rotated = imagerotate( $this->image, $angle, $transparency );
|
||
|
|
|
||
|
|
if ( is_gd_image( $rotated ) ) {
|
||
|
|
imagealphablending( $rotated, true );
|
||
|
|
imagesavealpha( $rotated, true );
|
||
|
|
imagedestroy( $this->image );
|
||
|
|
$this->image = $rotated;
|
||
|
|
$this->update_size();
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return new WP_Error( 'image_rotate_error', __( 'Image rotate failed.' ), $this->file );
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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 ) {
|
||
|
|
$w = $this->size['width'];
|
||
|
|
$h = $this->size['height'];
|
||
|
|
$dst = wp_imagecreatetruecolor( $w, $h );
|
||
|
|
|
||
|
|
if ( is_gd_image( $dst ) ) {
|
||
|
|
$sx = $vert ? ( $w - 1 ) : 0;
|
||
|
|
$sy = $horz ? ( $h - 1 ) : 0;
|
||
|
|
$sw = $vert ? -$w : $w;
|
||
|
|
$sh = $horz ? -$h : $h;
|
||
|
|
|
||
|
|
if ( imagecopyresampled( $dst, $this->image, 0, 0, $sx, $sy, $w, $h, $sw, $sh ) ) {
|
||
|
|
imagedestroy( $this->image );
|
||
|
|
$this->image = $dst;
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return new WP_Error( 'image_flip_error', __( 'Image flip failed.' ), $this->file );
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Saves current in-memory image to file.
|
||
|
|
*
|
||
|
|
* @since 3.5.0
|
||
|
|
* @since 5.9.0 Renamed `$filename` to `$destfilename` to match parent class
|
||
|
|
* for PHP 8 named parameter support.
|
||
|
|
* @since 6.0.0 The `$filesize` value was added to the returned array.
|
||
|
|
*
|
||
|
|
* @param string|null $destfilename Optional. Destination filename. Default null.
|
||
|
|
* @param string|null $mime_type Optional. The mime-type. Default null.
|
||
|
|
* @return array|WP_Error {
|
||
|
|
* Array on success or WP_Error if the file failed to save.
|
||
|
|
*
|
||
|
|
* @type string $path Path to the image file.
|
||
|
|
* @type string $file Name of the image file.
|
||
|
|
* @type int $width Image width.
|
||
|
|
* @type int $height Image height.
|
||
|
|
* @type string $mime-type The mime type of the image.
|
||
|
|
* @type int $filesize File size of the image.
|
||
|
|
* }
|
||
|
|
*/
|
||
|
|
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'];
|
||
|
|
}
|
||
|
|
|
||
|
|
return $saved;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @since 3.5.0
|
||
|
|
* @since 6.0.0 The `$filesize` value was added to the returned array.
|
||
|
|
*
|
||
|
|
* @param resource|GdImage $image
|
||
|
|
* @param string|null $filename
|
||
|
|
* @param string|null $mime_type
|
||
|
|
* @return array|WP_Error {
|
||
|
|
* Array on success or WP_Error if the file failed to save.
|
||
|
|
*
|
||
|
|
* @type string $path Path to the image file.
|
||
|
|
* @type string $file Name of the image file.
|
||
|
|
* @type int $width Image width.
|
||
|
|
* @type int $height Image height.
|
||
|
|
* @type string $mime-type The mime type of the image.
|
||
|
|
* @type int $filesize File size of the image.
|
||
|
|
* }
|
||
|
|
*/
|
||
|
|
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 );
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( 'image/gif' === $mime_type ) {
|
||
|
|
if ( ! $this->make_image( $filename, 'imagegif', array( $image, $filename ) ) ) {
|
||
|
|
return new WP_Error( 'image_save_error', __( 'Image Editor Save Failed' ) );
|
||
|
|
}
|
||
|
|
} elseif ( 'image/png' === $mime_type ) {
|
||
|
|
// Convert from full colors to index colors, like original PNG.
|
||
|
|
if ( function_exists( 'imageistruecolor' ) && ! imageistruecolor( $image ) ) {
|
||
|
|
imagetruecolortopalette( $image, false, imagecolorstotal( $image ) );
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( ! $this->make_image( $filename, 'imagepng', array( $image, $filename ) ) ) {
|
||
|
|
return new WP_Error( 'image_save_error', __( 'Image Editor Save Failed' ) );
|
||
|
|
}
|
||
|
|
} elseif ( 'image/jpeg' === $mime_type ) {
|
||
|
|
if ( ! $this->make_image( $filename, 'imagejpeg', array( $image, $filename, $this->get_quality() ) ) ) {
|
||
|
|
return new WP_Error( 'image_save_error', __( 'Image Editor Save Failed' ) );
|
||
|
|
}
|
||
|
|
} elseif ( 'image/webp' == $mime_type ) {
|
||
|
|
if ( ! function_exists( 'imagewebp' ) || ! $this->make_image( $filename, 'imagewebp', array( $image, $filename, $this->get_quality() ) ) ) {
|
||
|
|
return new WP_Error( 'image_save_error', __( 'Image Editor Save Failed' ) );
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
return new WP_Error( 'image_save_error', __( 'Image Editor Save Failed' ) );
|
||
|
|
}
|
||
|
|
|
||
|
|
// 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,
|
||
|
|
/**
|
||
|
|
* Filters the name of the saved image file.
|
||
|
|
*
|
||
|
|
* @since 2.6.0
|
||
|
|
*
|
||
|
|
* @param string $filename Name of the file.
|
||
|
|
*/
|
||
|
|
'file' => wp_basename( apply_filters( 'image_make_intermediate_size', $filename ) ),
|
||
|
|
'width' => $this->size['width'],
|
||
|
|
'height' => $this->size['height'],
|
||
|
|
'mime-type' => $mime_type,
|
||
|
|
'filesize' => wp_filesize( $filename ),
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns stream of current image.
|
||
|
|
*
|
||
|
|
* @since 3.5.0
|
||
|
|
*
|
||
|
|
* @param string $mime_type The mime type of the image.
|
||
|
|
* @return bool True on success, false on failure.
|
||
|
|
*/
|
||
|
|
public function stream( $mime_type = null ) {
|
||
|
|
list( $filename, $extension, $mime_type ) = $this->get_output_format( null, $mime_type );
|
||
|
|
|
||
|
|
switch ( $mime_type ) {
|
||
|
|
case 'image/png':
|
||
|
|
header( 'Content-Type: image/png' );
|
||
|
|
return imagepng( $this->image );
|
||
|
|
case 'image/gif':
|
||
|
|
header( 'Content-Type: image/gif' );
|
||
|
|
return imagegif( $this->image );
|
||
|
|
case 'image/webp':
|
||
|
|
if ( function_exists( 'imagewebp' ) ) {
|
||
|
|
header( 'Content-Type: image/webp' );
|
||
|
|
return imagewebp( $this->image, null, $this->get_quality() );
|
||
|
|
}
|
||
|
|
// Fall back to the default if webp isn't supported.
|
||
|
|
default:
|
||
|
|
header( 'Content-Type: image/jpeg' );
|
||
|
|
return imagejpeg( $this->image, null, $this->get_quality() );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Either calls editor's save function or handles file as a stream.
|
||
|
|
*
|
||
|
|
* @since 3.5.0
|
||
|
|
*
|
||
|
|
* @param string $filename
|
||
|
|
* @param callable $callback
|
||
|
|
* @param array $arguments
|
||
|
|
* @return bool
|
||
|
|
*/
|
||
|
|
protected function make_image( $filename, $callback, $arguments ) {
|
||
|
|
if ( wp_is_stream( $filename ) ) {
|
||
|
|
$arguments[1] = null;
|
||
|
|
}
|
||
|
|
|
||
|
|
return parent::make_image( $filename, $callback, $arguments );
|
||
|
|
}
|
||
|
|
}
|