shape = gdk_cairo_region_create_from_surface (surface);
cairo_surface_destroy (surface);
gtk_widget_shape_combine_region (widget, shape);
cairo_region_destroy (shape);
shape = gdk_cairo_region_create_from_surface (surface);
cairo_surface_destroy (surface);
gtk_widget_shape_combine_region (widget, shape);
cairo_region_destroy (shape);