gdk-visual-best-depth ()

An integer with the best available depth.

Get the best available depth for the default GDK screen. "Best" means "largest", i.e. 32 preferred over 24 preferred over 8 bits per pixel. The gdk-visual-best-depth function has been deprecated since version 3.22 and should not be used in newly written code. Visual selection should be done using the gdk-screen-system-visual and gdk-screen-rgba-visual functions.