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<?php

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/**

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* WordPress GD Image Editor

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* @package WordPress

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* @subpackage Image_Editor

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/**

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* WordPress Image Editor Class for Image Manipulation through GD

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* @since 3.5.0

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* @see WP_Image_Editor

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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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* @var resource|GdImage

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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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* @since 3.5.0

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* @param array $args

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* @return bool

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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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* @since 3.5.0

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* @param string $mime_type

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* @return bool

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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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case 'image/avif':

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return ( $image_types & IMG_AVIF ) !== 0 && function_exists( 'imageavif' );

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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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* @since 3.5.0

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* @return true|WP_Error True if loaded successfully; WP_Error on failure.

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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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// AVIF may not work with imagecreatefromstring().

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if (

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function_exists( 'imagecreatefromavif' ) &&

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( 'image/avif' === wp_get_image_mime( $this->file ) )

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) {

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$this->image = @imagecreatefromavif( $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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* @since 3.5.0

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* @param int $width

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* @param int $height

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* @return true

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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()` which returns a GD resource or GdImage instance.

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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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* @since 3.5.0

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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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* @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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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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* @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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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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* 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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* 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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* @since 3.5.0

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* @param array $sizes {

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* An array of image size data arrays.

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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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* @type array ...$0 {

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* Array of height, width values, and whether to crop.

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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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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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* @since 5.3.0

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* @param array $size_data {

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* Array of size data.

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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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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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* @since 3.5.0

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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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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,

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* use same as width/height from source.

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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 );

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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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* @since 3.5.0

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* @param float $angle

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* @return true|WP_Error

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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_gd_image( $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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* @since 3.5.0

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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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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_gd_image( $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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* @since 3.5.0

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* @since 5.9.0 Renamed `$filename` to `$destfilename` to match parent class

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* for PHP 8 named parameter support.

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* @since 6.0.0 The `$filesize` value was added to the returned array.

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* @param string|null $destfilename Optional. Destination filename. Default null.

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* @param string|null $mime_type Optional. The mime-type. Default null.

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* @return array|WP_Error {

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* Array on success or WP_Error if the file failed to save.

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* @type string $path Path to the image file.

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* @type string $file Name of the image file.

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* @type int $width Image width.

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* @type int $height Image height.

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* @type string $mime-type The mime type of the image.

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* @type int $filesize File size of the image.

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* }

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public function save( $destfilename = null, $mime_type = null ) {

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$saved = $this->_save( $this->image, $destfilename, $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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* @since 3.5.0

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* @since 6.0.0 The `$filesize` value was added to the returned array.

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* @param resource|GdImage $image

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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 {

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* Array on success or WP_Error if the file failed to save.

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* @type string $path Path to the image file.

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* @type string $file Name of the image file.

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* @type int $width Image width.

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* @type int $height Image height.

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* @type string $mime-type The mime type of the image.

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* @type int $filesize File size of the image.

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* }

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protected function _save( $image, $filename = null, $mime_type = null ) {

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