Media: Move wp_default_image_output_mapping() filter callback to fr…

…ontend scope.

While the `image_editor_output_format` filter is primarily used in WP Admin, it can also be executed in frontend scope, as the related `WP_Image_Editor` class and `wp_unique_filename()` function are being loaded in that scope.

Follow up to [54086].

See #55443, #56526.

Built from https://develop.svn.wordpress.org/trunk@54094

wp-admin/includes/admin-filters.php

@@ -37,8 +37,6 @@
 
 add_filter( 'media_upload_tabs', 'update_gallery_tab' );
 
-add_filter( 'image_editor_output_format', 'wp_default_image_output_mapping' );
-
 // Admin color schemes.
 add_action( 'admin_init', 'register_admin_color_schemes', 1 );
 add_action( 'admin_head', 'wp_color_scheme_settings' );

wp-admin/includes/media.php

@@ -3843,18 +3843,3 @@ function wp_media_attach_action( $parent_id, $action = 'attach' ) {
 		exit;
 	}
 }
-
-/**
- * Filters the default image output mapping.
- *
- * With this filter callback, WebP image files will be generated for certain JPEG source files.
- *
- * @since 6.1.0
- *
- * @param array $output_mapping Map of mime type to output format.
- * @retun array The adjusted default output mapping.
- */
-function wp_default_image_output_mapping( $output_mapping ) {
-	$output_mapping['image/jpeg'] = 'image/webp';
-	return $output_mapping;
-}

wp-includes/default-filters.php

@@ -632,6 +632,8 @@
 add_filter( 'image_send_to_editor', 'image_add_caption', 20, 8 );
 add_filter( 'media_send_to_editor', 'image_media_send_to_editor', 10, 3 );
 
+add_filter( 'image_editor_output_format', 'wp_default_image_output_mapping' );
+
 // Embeds.
 add_action( 'rest_api_init', 'wp_oembed_register_route' );
 add_filter( 'rest_pre_serve_request', '_oembed_rest_pre_serve_request', 10, 4 );

wp-includes/media.php

@@ -3904,6 +3904,21 @@ function _wp_image_editor_choose( $args = array() ) {
 	return false;
 }
 
+/**
+ * Filters the default image output mapping.
+ *
+ * With this filter callback, WebP image files will be generated for certain JPEG source files.
+ *
+ * @since 6.1.0
+ *
+ * @param array $output_mapping Map of mime type to output format.
+ * @retun array The adjusted default output mapping.
+ */
+function wp_default_image_output_mapping( $output_mapping ) {
+	$output_mapping['image/jpeg'] = 'image/webp';
+	return $output_mapping;
+}
+
 /**
  * Prints default Plupload arguments.
  *

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.1-alpha-54093';
+$wp_version = '6.1-alpha-54094';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.