Returns whether surfaces on this @display are created with an
alpha channel.
Even if a %TRUE is returned, it is possible that the
surface’s alpha channel won’t be honored when displaying the
surface on the screen: in particular, for X an appropriate
windowing manager and compositing manager must be running to
provide appropriate display. Use [method@Gdk.Display.is_composited]
to check if that is the case.
Returns whether surfaces on this @display are created with an alpha channel.
Even if a %TRUE is returned, it is possible that the surface’s alpha channel won’t be honored when displaying the surface on the screen: in particular, for X an appropriate windowing manager and compositing manager must be running to provide appropriate display. Use [method@Gdk.Display.is_composited] to check if that is the case.
On modern displays, this value is always %TRUE.