Get the best visual with depth @depth for the default GDK screen.
Color visuals and visuals with mutable colormaps are preferred
over grayscale or fixed-colormap visuals. The return value should
not be freed. %NULL may be returned if no visual supports @depth.
Get the best visual with depth @depth for the default GDK screen. Color visuals and visuals with mutable colormaps are preferred over grayscale or fixed-colormap visuals. The return value should not be freed. %NULL may be returned if no visual supports @depth.