action->set_param("canvas",dest_canvas);
action->set_param("canvas_interface",canvas_interface());
action->set_param("layer",src);
action->set_param("new_index",dest_layer_depth);
action->set_param("dest_canvas",dest_canvas);
if(canvas_interface()->get_instance()->perform_action(action))
action->set_param("canvas",dest_canvas);
action->set_param("canvas_interface",canvas_interface());
action->set_param("layer",src);
action->set_param("new_index",dest_layer_depth);
action->set_param("dest_canvas",dest_canvas);
if(canvas_interface()->get_instance()->perform_action(action))