<?php

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/**

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* File contains all the administration image manipulation functions.

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*

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* @package WordPress

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* @subpackage Administration

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*/

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/**

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* Crops an image to a given size.

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*

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* @since 2.1.0

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*

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* @param string|int $src The source file or Attachment ID.

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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 The destination width.

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* @param int $dst_h The destination height.

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* @param bool|false $src_abs Optional. If the source crop points are absolute.

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* @param string|false $dst_file Optional. The destination file to write to.

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* @return string|WP_Error New filepath on success, WP_Error on failure.

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*/

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function wp_crop_image( $src, $src_x, $src_y, $src_w, $src_h, $dst_w, $dst_h, $src_abs = false, $dst_file = false ) {

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$src_file = $src;

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if ( is_numeric( $src ) ) { // Handle int as attachment ID.

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$src_file = get_attached_file( $src );

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if ( ! file_exists( $src_file ) ) {

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// If the file doesn't exist, attempt a URL fopen on the src link.

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// This can occur with certain file replication plugins.

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$src = _load_image_to_edit_path( $src, 'full' );

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} else {

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$src = $src_file;

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}

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}

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$editor = wp_get_image_editor( $src );

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if ( is_wp_error( $editor ) ) {

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return $editor;

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}

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$src = $editor->crop( $src_x, $src_y, $src_w, $src_h, $dst_w, $dst_h, $src_abs );

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if ( is_wp_error( $src ) ) {

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return $src;

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}

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if ( ! $dst_file ) {

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$dst_file = str_replace( wp_basename( $src_file ), 'cropped-' . wp_basename( $src_file ), $src_file );

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}

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/*

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* The directory containing the original file may no longer exist when

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* using a replication plugin.

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*/

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wp_mkdir_p( dirname( $dst_file ) );

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$dst_file = dirname( $dst_file ) . '/' . wp_unique_filename( dirname( $dst_file ), wp_basename( $dst_file ) );

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$result = $editor->save( $dst_file );

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if ( is_wp_error( $result ) ) {

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return $result;

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}

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return $dst_file;

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}

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/**

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* Compare the existing image sub-sizes (as saved in the attachment meta)

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* to the currently registered image sub-sizes, and return the difference.

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*

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* Registered sub-sizes that are larger than the image are skipped.

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*

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* @since 5.3.0

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*

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* @param int $attachment_id The image attachment post ID.

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* @return array An array of the image sub-sizes that are currently defined but don't exist for this image.

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*/

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function wp_get_missing_image_subsizes( $attachment_id ) {

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if ( ! wp_attachment_is_image( $attachment_id ) ) {

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return array();

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}

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$registered_sizes = wp_get_registered_image_subsizes();

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$image_meta = wp_get_attachment_metadata( $attachment_id );

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// Meta error?

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if ( empty( $image_meta ) ) {

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return $registered_sizes;

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}

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// Use the originally uploaded image dimensions as full_width and full_height.

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if ( ! empty( $image_meta['original_image'] ) ) {

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$image_file = wp_get_original_image_path( $attachment_id );

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$imagesize = wp_getimagesize( $image_file );

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}

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if ( ! empty( $imagesize ) ) {

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$full_width = $imagesize[0];

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$full_height = $imagesize[1];

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} else {

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$full_width = (int) $image_meta['width'];

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$full_height = (int) $image_meta['height'];

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}

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$possible_sizes = array();

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// Skip registered sizes that are too large for the uploaded image.

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foreach ( $registered_sizes as $size_name => $size_data ) {

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if ( image_resize_dimensions( $full_width, $full_height, $size_data['width'], $size_data['height'], $size_data['crop'] ) ) {

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$possible_sizes[ $size_name ] = $size_data;

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}

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}

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if ( empty( $image_meta['sizes'] ) ) {

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$image_meta['sizes'] = array();

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}

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/*

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* Remove sizes that already exist. Only checks for matching "size names".

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* It is possible that the dimensions for a particular size name have changed.

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* For example the user has changed the values on the Settings -> Media screen.

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* However we keep the old sub-sizes with the previous dimensions

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* as the image may have been used in an older post.

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*/

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$missing_sizes = array_diff_key( $possible_sizes, $image_meta['sizes'] );

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/**

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* Filters the array of missing image sub-sizes for an uploaded image.

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*

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* @since 5.3.0

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*

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* @param array $missing_sizes Array with the missing image sub-sizes.

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* @param array $image_meta The image meta data.

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* @param int $attachment_id The image attachment post ID.

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*/

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return apply_filters( 'wp_get_missing_image_subsizes', $missing_sizes, $image_meta, $attachment_id );

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}

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/**

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* If any of the currently registered image sub-sizes are missing,

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* create them and update the image meta data.

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*

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* @since 5.3.0

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*

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* @param int $attachment_id The image attachment post ID.

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* @return array|WP_Error The updated image meta data array or WP_Error object

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* if both the image meta and the attached file are missing.

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*/

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function wp_update_image_subsizes( $attachment_id ) {

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$image_meta = wp_get_attachment_metadata( $attachment_id );

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$image_file = wp_get_original_image_path( $attachment_id );

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if ( empty( $image_meta ) || ! is_array( $image_meta ) ) {

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// Previously failed upload?

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// If there is an uploaded file, make all sub-sizes and generate all of the attachment meta.

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if ( ! empty( $image_file ) ) {

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$image_meta = wp_create_image_subsizes( $image_file, $attachment_id );

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} else {

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return new WP_Error( 'invalid_attachment', __( 'The attached file cannot be found.' ) );

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}

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} else {

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$missing_sizes = wp_get_missing_image_subsizes( $attachment_id );

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if ( empty( $missing_sizes ) ) {

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return $image_meta;

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}

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// This also updates the image meta.

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$image_meta = _wp_make_subsizes( $missing_sizes, $image_file, $image_meta, $attachment_id );

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}

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/** This filter is documented in wp-admin/includes/image.php */

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$image_meta = apply_filters( 'wp_generate_attachment_metadata', $image_meta, $attachment_id, 'update' );

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// Save the updated metadata.

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wp_update_attachment_metadata( $attachment_id, $image_meta );

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return $image_meta;

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}

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/**

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* Updates the attached file and image meta data when the original image was edited.

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*

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* @since 5.3.0

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* @access private

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*

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* @param array $saved_data The data returned from WP_Image_Editor after successfully saving an image.

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* @param string $original_file Path to the original file.

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* @param array $image_meta The image meta data.

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* @param int $attachment_id The attachment post ID.

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* @return array The updated image meta data.

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*/

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function _wp_image_meta_replace_original( $saved_data, $original_file, $image_meta, $attachment_id ) {

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$new_file = $saved_data['path'];

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// Update the attached file meta.

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update_attached_file( $attachment_id, $new_file );

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// Width and height of the new image.

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$image_meta['width'] = $saved_data['width'];

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$image_meta['height'] = $saved_data['height'];

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// Make the file path relative to the upload dir.

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$image_meta['file'] = _wp_relative_upload_path( $new_file );

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// Store the original image file name in image_meta.

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$image_meta['original_image'] = wp_basename( $original_file );

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return $image_meta;

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}

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/**

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* Creates image sub-sizes, adds the new data to the image meta `sizes` array, and updates the image metadata.

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*

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* Intended for use after an image is uploaded. Saves/updates the image metadata after each

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* sub-size is created. If there was an error, it is added to the returned image metadata array.

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*

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* @since 5.3.0

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*

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* @param string $file Full path to the image file.

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* @param int $attachment_id Attachment Id to process.

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* @return array The image attachment meta data.

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*/

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function wp_create_image_subsizes( $file, $attachment_id ) {

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$imagesize = wp_getimagesize( $file );

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if ( empty( $imagesize ) ) {

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// File is not an image.

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return array();

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}

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// Default image meta.

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$image_meta = array(

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'width' => $imagesize[0],

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'height' => $imagesize[1],

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'file' => _wp_relative_upload_path( $file ),

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'sizes' => array(),

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);

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// Fetch additional metadata from EXIF/IPTC.

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$exif_meta = wp_read_image_metadata( $file );

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if ( $exif_meta ) {

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$image_meta['image_meta'] = $exif_meta;

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}

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// Do not scale (large) PNG images. May result in sub-sizes that have greater file size than the original. See #48736.

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if ( 'image/png' !== $imagesize['mime'] ) {

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/**

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* Filters the "BIG image" threshold value.

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*

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* If the original image width or height is above the threshold, it will be scaled down. The threshold is

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* used as max width and max height. The scaled down image will be used as the largest available size, including

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* the `_wp_attached_file` post meta value.

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*

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* Returning `false` from the filter callback will disable the scaling.

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*

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* @since 5.3.0

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*

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* @param int $threshold The threshold value in pixels. Default 2560.

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* @param array $imagesize {

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* Indexed array of the image width and height in pixels.

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*

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* @type int $0 The image width.

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* @type int $1 The image height.

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* }

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* @param string $file Full path to the uploaded image file.

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* @param int $attachment_id Attachment post ID.

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*/

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$threshold = (int) apply_filters( 'big_image_size_threshold', 2560, $imagesize, $file, $attachment_id );

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// If the original image's dimensions are over the threshold,

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// scale the image and use it as the "full" size.

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if ( $threshold && ( $image_meta['width'] > $threshold || $image_meta['height'] > $threshold ) ) {

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$editor = wp_get_image_editor( $file );

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if ( is_wp_error( $editor ) ) {

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// This image cannot be edited.

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return $image_meta;

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}

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// Resize the image.

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$resized = $editor->resize( $threshold, $threshold );

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$rotated = null;

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// If there is EXIF data, rotate according to EXIF Orientation.

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if ( ! is_wp_error( $resized ) && is_array( $exif_meta ) ) {

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$resized = $editor->maybe_exif_rotate();

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$rotated = $resized;

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}

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if ( ! is_wp_error( $resized ) ) {

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// Append "-scaled" to the image file name. It will look like "my_image-scaled.jpg".

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// This doesn't affect the sub-sizes names as they are generated from the original image (for best quality).

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$saved = $editor->save( $editor->generate_filename( 'scaled' ) );

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if ( ! is_wp_error( $saved ) ) {

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$image_meta = _wp_image_meta_replace_original( $saved, $file, $image_meta, $attachment_id );

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// If the image was rotated update the stored EXIF data.

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if ( true === $rotated && ! empty( $image_meta['image_meta']['orientation'] ) ) {

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$image_meta['image_meta']['orientation'] = 1;

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}

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} else {

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// TODO: Log errors.

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}

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} else {

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// TODO: Log errors.

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}

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} elseif ( ! empty( $exif_meta['orientation'] ) && 1 !== (int) $exif_meta['orientation'] ) {

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// Rotate the whole original image if there is EXIF data and "orientation" is not 1.

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$editor = wp_get_image_editor( $file );

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if ( is_wp_error( $editor ) ) {

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// This image cannot be edited.

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return $image_meta;

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}

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// Rotate the image.

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$rotated = $editor->maybe_exif_rotate();

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if ( true === $rotated ) {

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// Append `-rotated` to the image file name.

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$saved = $editor->save( $editor->generate_filename( 'rotated' ) );

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if ( ! is_wp_error( $saved ) ) {

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$image_meta = _wp_image_meta_replace_original( $saved, $file, $image_meta, $attachment_id );

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// Update the stored EXIF data.

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if ( ! empty( $image_meta['image_meta']['orientation'] ) ) {

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$image_meta['image_meta']['orientation'] = 1;

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}

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} else {

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// TODO: Log errors.

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}

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}

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}

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}

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/*

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* Initial save of the new metadata.

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* At this point the file was uploaded and moved to the uploads directory

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* but the image sub-sizes haven't been created yet and the `sizes` array is empty.

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*/

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wp_update_attachment_metadata( $attachment_id, $image_meta );

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$new_sizes = wp_get_registered_image_subsizes();

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/**

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* Filters the image sizes automatically generated when uploading an image.

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*

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* @since 2.9.0

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* @since 4.4.0 Added the `$image_meta` argument.

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* @since 5.3.0 Added the `$attachment_id` argument.

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*

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* @param array $new_sizes Associative array of image sizes to be created.

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* @param array $image_meta The image meta data: width, height, file, sizes, etc.

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* @param int $attachment_id The attachment post ID for the image.

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*/

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$new_sizes = apply_filters( 'intermediate_image_sizes_advanced', $new_sizes, $image_meta, $attachment_id );

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return _wp_make_subsizes( $new_sizes, $file, $image_meta, $attachment_id );

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}

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/**

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* Low-level function to create image sub-sizes.

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*

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* Updates the image meta after each sub-size is created.

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* Errors are stored in the returned image metadata array.

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*

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* @since 5.3.0

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* @access private

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*

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* @param array $new_sizes Array defining what sizes to create.

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* @param string $file Full path to the image file.

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* @param array $image_meta The attachment meta data array.

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* @param int $attachment_id Attachment Id to process.

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* @return array The attachment meta data with updated `sizes` array. Includes an array of errors encountered while resizing.

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*/

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function _wp_make_subsizes( $new_sizes, $file, $image_meta, $attachment_id ) {

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if ( empty( $image_meta ) || ! is_array( $image_meta ) ) {

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// Not an image attachment.

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return array();

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}

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// Check if any of the new sizes already exist.

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if ( isset( $image_meta['sizes'] ) && is_array( $image_meta['sizes'] ) ) {

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foreach ( $image_meta['sizes'] as $size_name => $size_meta ) {

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/*

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* Only checks "size name" so we don't override existing images even if the dimensions

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* don't match the currently defined size with the same name.

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* To change the behavior, unset changed/mismatched sizes in the `sizes` array in image meta.

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*/

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if ( array_key_exists( $size_name, $new_sizes ) ) {

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unset( $new_sizes[ $size_name ] );

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}

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}

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} else {

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$image_meta['sizes'] = array();

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}

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if ( empty( $new_sizes ) ) {

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// Nothing to do...

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return $image_meta;

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}

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/*

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* Sort the image sub-sizes in order of priority when creating them.

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* This ensures there is an appropriate sub-size the user can access immediately

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* even when there was an error and not all sub-sizes were created.

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*/

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$priority = array(

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'medium' => null,

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'large' => null,

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'thumbnail' => null,

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'medium_large' => null,

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);

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$new_sizes = array_filter( array_merge( $priority, $new_sizes ) );

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$editor = wp_get_image_editor( $file );

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if ( is_wp_error( $editor ) ) {

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// The image cannot be edited.

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return $image_meta;

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}

[429] Fix | Delete

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// If stored EXIF data exists, rotate the source image before creating sub-sizes.

[431] Fix | Delete

if ( ! empty( $image_meta['image_meta'] ) ) {

[432] Fix | Delete

$rotated = $editor->maybe_exif_rotate();

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[434] Fix | Delete

if ( is_wp_error( $rotated ) ) {

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// TODO: Log errors.

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}

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}

[438] Fix | Delete

[439] Fix | Delete

if ( method_exists( $editor, 'make_subsize' ) ) {

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foreach ( $new_sizes as $new_size_name => $new_size_data ) {

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$new_size_meta = $editor->make_subsize( $new_size_data );

[442] Fix | Delete

[443] Fix | Delete

if ( is_wp_error( $new_size_meta ) ) {

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// TODO: Log errors.

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} else {

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// Save the size meta value.

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$image_meta['sizes'][ $new_size_name ] = $new_size_meta;

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wp_update_attachment_metadata( $attachment_id, $image_meta );

[449] Fix | Delete

}

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}

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} else {

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// Fall back to `$editor->multi_resize()`.

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$created_sizes = $editor->multi_resize( $new_sizes );

[454] Fix | Delete

[455] Fix | Delete

if ( ! empty( $created_sizes ) ) {

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$image_meta['sizes'] = array_merge( $image_meta['sizes'], $created_sizes );

[457] Fix | Delete

wp_update_attachment_metadata( $attachment_id, $image_meta );

[458] Fix | Delete

}

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}

[460] Fix | Delete

[461] Fix | Delete

return $image_meta;

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}

[463] Fix | Delete

[464] Fix | Delete

/**

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* Generate attachment meta data and create image sub-sizes for images.

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*

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* @since 2.1.0

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*

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* @param int $attachment_id Attachment Id to process.

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* @param string $file Filepath of the Attached image.

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* @return mixed Metadata for attachment.

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*/

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function wp_generate_attachment_metadata( $attachment_id, $file ) {

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$attachment = get_post( $attachment_id );

[475] Fix | Delete

[476] Fix | Delete

$metadata = array();

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$support = false;

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$mime_type = get_post_mime_type( $attachment );

[479] Fix | Delete

[480] Fix | Delete

if ( preg_match( '!^image/!', $mime_type ) && file_is_displayable_image( $file ) ) {

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// Make thumbnails and other intermediate sizes.

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$metadata = wp_create_image_subsizes( $file, $attachment_id );

[483] Fix | Delete

} elseif ( wp_attachment_is( 'video', $attachment ) ) {

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$metadata = wp_read_video_metadata( $file );

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$support = current_theme_supports( 'post-thumbnails', 'attachment:video' ) || post_type_supports( 'attachment:video', 'thumbnail' );

[486] Fix | Delete

} elseif ( wp_attachment_is( 'audio', $attachment ) ) {

[487] Fix | Delete

$metadata = wp_read_audio_metadata( $file );

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$support = current_theme_supports( 'post-thumbnails', 'attachment:audio' ) || post_type_supports( 'attachment:audio', 'thumbnail' );

[489] Fix | Delete

}

[490] Fix | Delete

[491] Fix | Delete

if ( $support && ! empty( $metadata['image']['data'] ) ) {

[492] Fix | Delete

// Check for existing cover.

[493] Fix | Delete

$hash = md5( $metadata['image']['data'] );

[494] Fix | Delete

$posts = get_posts(

[495] Fix | Delete

array(

[496] Fix | Delete

'fields' => 'ids',

[497] Fix | Delete

'post_type' => 'attachment',

[498] Fix | Delete

'post_mime_type' => $metadata['image']['mime'],

[499] Fix | Delete