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.