async-upload.php calls media_handle_upload( 'async-upload', $post_id ); wp_handle_upload() wp_insert_attachment() wp_generate_attachment_metadata() wp_create_image_subsizes() @filter big_image_size_threshold $editor->resize() image_resize_dimensions() @filter image_resize_dimensions() Attachment::image_resize_dimensions ::get_current_cropdata() ::generate_cropdata() MediaHelper::crop_from_focuspoint() wp_update_attachment_metadata()