Declaration [src]

gdk_screen_get_rgba_visual (
  GdkScreen* screen

Description [src]

Gets a visual to use for creating windows with an alpha channel. The windowing system on which GTK+ is running may not support this capability, in which case NULL will be returned. Even if a non-NULL value is returned, its possible that the window’s alpha channel won’t be honored when displaying the window on the screen: in particular, for X an appropriate windowing manager and compositing manager must be running to provide appropriate display.

This functionality is not implemented in the Windows backend.

For setting an overall opacity for a top-level window, see gdk_window_set_opacity().

Available since:2.8

Return value

Returns: GdkVisual

A visual to use for windows with an alpha channel or NULL if the capability is not available.

 The data is owned by the instance.
 The return value can be NULL.