| author | ymh <ymh.work@gmail.com> |
| Tue, 15 Dec 2020 13:49:49 +0100 | |
| changeset 16 | a86126ab1dd4 |
| parent 9 | 177826044cd9 |
| child 18 | be944660c56a |
| permissions | -rw-r--r-- |
| 0 | 1 |
<?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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* @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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} |
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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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} |
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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?' ), $this->file ); |
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} |
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// Set artificially high because GD uses uncompressed images in memory. |
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wp_raise_memory_limit( 'image' ); |
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$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.' ), $this->file ); |
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} |
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$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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} |
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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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* 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'] == $max_h ) ) { |
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return true; |
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} |
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$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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} |
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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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* @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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* 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 $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. |
| 0 | 225 |
* } |
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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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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 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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| 16 | 310 |
// If destination width/height isn't specified, |
311 |
// use same as width/height from source. |
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| 9 | 312 |
if ( ! $dst_w ) { |
| 0 | 313 |
$dst_w = $src_w; |
| 9 | 314 |
} |
315 |
if ( ! $dst_h ) { |
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| 0 | 316 |
$dst_h = $src_h; |
| 9 | 317 |
} |
| 0 | 318 |
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$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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||
| 9 | 326 |
if ( function_exists( 'imageantialias' ) ) { |
| 0 | 327 |
imageantialias( $dst, true ); |
| 9 | 328 |
} |
| 0 | 329 |
|
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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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||
332 |
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(); |
|
336 |
return true; |
|
337 |
} |
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||
| 9 | 339 |
return new WP_Error( 'image_crop_error', __( 'Image crop failed.' ), $this->file ); |
| 0 | 340 |
} |
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||
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/** |
|
343 |
* Rotates current image counter-clockwise by $angle. |
|
344 |
* Ported from image-edit.php |
|
345 |
* |
|
346 |
* @since 3.5.0 |
|
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* |
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* @param float $angle |
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* @return true|WP_Error |
| 0 | 350 |
*/ |
351 |
public function rotate( $angle ) { |
|
| 9 | 352 |
if ( function_exists( 'imagerotate' ) ) { |
| 5 | 353 |
$transparency = imagecolorallocatealpha( $this->image, 255, 255, 255, 127 ); |
| 9 | 354 |
$rotated = imagerotate( $this->image, $angle, $transparency ); |
| 0 | 355 |
|
356 |
if ( is_resource( $rotated ) ) { |
|
| 5 | 357 |
imagealphablending( $rotated, true ); |
358 |
imagesavealpha( $rotated, true ); |
|
| 0 | 359 |
imagedestroy( $this->image ); |
360 |
$this->image = $rotated; |
|
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$this->update_size(); |
|
362 |
return true; |
|
363 |
} |
|
364 |
} |
|
| 9 | 365 |
return new WP_Error( 'image_rotate_error', __( 'Image rotate failed.' ), $this->file ); |
| 0 | 366 |
} |
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||
368 |
/** |
|
369 |
* Flips current image. |
|
370 |
* |
|
371 |
* @since 3.5.0 |
|
372 |
* |
|
| 9 | 373 |
* @param bool $horz Flip along Horizontal Axis. |
374 |
* @param bool $vert Flip along Vertical Axis. |
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
375 |
* @return true|WP_Error |
| 0 | 376 |
*/ |
377 |
public function flip( $horz, $vert ) { |
|
| 9 | 378 |
$w = $this->size['width']; |
379 |
$h = $this->size['height']; |
|
| 0 | 380 |
$dst = wp_imagecreatetruecolor( $w, $h ); |
381 |
||
382 |
if ( is_resource( $dst ) ) { |
|
| 9 | 383 |
$sx = $vert ? ( $w - 1 ) : 0; |
384 |
$sy = $horz ? ( $h - 1 ) : 0; |
|
| 0 | 385 |
$sw = $vert ? -$w : $w; |
386 |
$sh = $horz ? -$h : $h; |
|
387 |
||
388 |
if ( imagecopyresampled( $dst, $this->image, 0, 0, $sx, $sy, $w, $h, $sw, $sh ) ) { |
|
389 |
imagedestroy( $this->image ); |
|
390 |
$this->image = $dst; |
|
391 |
return true; |
|
392 |
} |
|
393 |
} |
|
| 9 | 394 |
return new WP_Error( 'image_flip_error', __( 'Image flip failed.' ), $this->file ); |
| 0 | 395 |
} |
396 |
||
397 |
/** |
|
398 |
* Saves current in-memory image to file. |
|
399 |
* |
|
400 |
* @since 3.5.0 |
|
401 |
* |
|
| 5 | 402 |
* @param string|null $filename |
403 |
* @param string|null $mime_type |
|
| 0 | 404 |
* @return array|WP_Error {'path'=>string, 'file'=>string, 'width'=>int, 'height'=>int, 'mime-type'=>string} |
405 |
*/ |
|
406 |
public function save( $filename = null, $mime_type = null ) { |
|
407 |
$saved = $this->_save( $this->image, $filename, $mime_type ); |
|
408 |
||
409 |
if ( ! is_wp_error( $saved ) ) { |
|
| 9 | 410 |
$this->file = $saved['path']; |
| 0 | 411 |
$this->mime_type = $saved['mime-type']; |
412 |
} |
|
413 |
||
414 |
return $saved; |
|
415 |
} |
|
416 |
||
| 5 | 417 |
/** |
| 16 | 418 |
* @param resource $image |
| 5 | 419 |
* @param string|null $filename |
420 |
* @param string|null $mime_type |
|
| 16 | 421 |
* @return array|WP_Error |
| 5 | 422 |
*/ |
| 0 | 423 |
protected function _save( $image, $filename = null, $mime_type = null ) { |
424 |
list( $filename, $extension, $mime_type ) = $this->get_output_format( $filename, $mime_type ); |
|
425 |
||
| 9 | 426 |
if ( ! $filename ) { |
| 0 | 427 |
$filename = $this->generate_filename( null, null, $extension ); |
| 9 | 428 |
} |
| 0 | 429 |
|
| 16 | 430 |
if ( 'image/gif' === $mime_type ) { |
| 9 | 431 |
if ( ! $this->make_image( $filename, 'imagegif', array( $image, $filename ) ) ) { |
432 |
return new WP_Error( 'image_save_error', __( 'Image Editor Save Failed' ) ); |
|
433 |
} |
|
| 16 | 434 |
} elseif ( 'image/png' === $mime_type ) { |
435 |
// Convert from full colors to index colors, like original PNG. |
|
| 9 | 436 |
if ( function_exists( 'imageistruecolor' ) && ! imageistruecolor( $image ) ) { |
| 0 | 437 |
imagetruecolortopalette( $image, false, imagecolorstotal( $image ) ); |
| 9 | 438 |
} |
| 0 | 439 |
|
| 9 | 440 |
if ( ! $this->make_image( $filename, 'imagepng', array( $image, $filename ) ) ) { |
441 |
return new WP_Error( 'image_save_error', __( 'Image Editor Save Failed' ) ); |
|
442 |
} |
|
| 16 | 443 |
} elseif ( 'image/jpeg' === $mime_type ) { |
| 9 | 444 |
if ( ! $this->make_image( $filename, 'imagejpeg', array( $image, $filename, $this->get_quality() ) ) ) { |
445 |
return new WP_Error( 'image_save_error', __( 'Image Editor Save Failed' ) ); |
|
446 |
} |
|
447 |
} else { |
|
448 |
return new WP_Error( 'image_save_error', __( 'Image Editor Save Failed' ) ); |
|
| 0 | 449 |
} |
450 |
||
| 16 | 451 |
// Set correct file permissions. |
| 9 | 452 |
$stat = stat( dirname( $filename ) ); |
| 16 | 453 |
$perms = $stat['mode'] & 0000666; // Same permissions as parent folder, strip off the executable bits. |
454 |
chmod( $filename, $perms ); |
|
| 0 | 455 |
|
456 |
return array( |
|
| 5 | 457 |
'path' => $filename, |
| 16 | 458 |
/** |
459 |
* Filters the name of the saved image file. |
|
460 |
* |
|
461 |
* @since 2.6.0 |
|
462 |
* |
|
463 |
* @param string $filename Name of the file. |
|
464 |
*/ |
|
| 5 | 465 |
'file' => wp_basename( apply_filters( 'image_make_intermediate_size', $filename ) ), |
466 |
'width' => $this->size['width'], |
|
467 |
'height' => $this->size['height'], |
|
468 |
'mime-type' => $mime_type, |
|
| 0 | 469 |
); |
470 |
} |
|
471 |
||
472 |
/** |
|
473 |
* Returns stream of current image. |
|
474 |
* |
|
475 |
* @since 3.5.0 |
|
476 |
* |
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
477 |
* @param string $mime_type The mime type of the image. |
|
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
478 |
* @return bool True on success, false on failure. |
| 0 | 479 |
*/ |
480 |
public function stream( $mime_type = null ) { |
|
481 |
list( $filename, $extension, $mime_type ) = $this->get_output_format( null, $mime_type ); |
|
482 |
||
483 |
switch ( $mime_type ) { |
|
484 |
case 'image/png': |
|
485 |
header( 'Content-Type: image/png' ); |
|
486 |
return imagepng( $this->image ); |
|
487 |
case 'image/gif': |
|
488 |
header( 'Content-Type: image/gif' ); |
|
489 |
return imagegif( $this->image ); |
|
490 |
default: |
|
491 |
header( 'Content-Type: image/jpeg' ); |
|
| 5 | 492 |
return imagejpeg( $this->image, null, $this->get_quality() ); |
| 0 | 493 |
} |
494 |
} |
|
495 |
||
496 |
/** |
|
497 |
* Either calls editor's save function or handles file as a stream. |
|
498 |
* |
|
499 |
* @since 3.5.0 |
|
500 |
* |
|
501 |
* @param string|stream $filename |
|
| 16 | 502 |
* @param callable $function |
503 |
* @param array $arguments |
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
504 |
* @return bool |
| 0 | 505 |
*/ |
506 |
protected function make_image( $filename, $function, $arguments ) { |
|
| 9 | 507 |
if ( wp_is_stream( $filename ) ) { |
| 0 | 508 |
$arguments[1] = null; |
| 9 | 509 |
} |
| 0 | 510 |
|
511 |
return parent::make_image( $filename, $function, $arguments ); |
|
512 |
} |
|
513 |
} |