gtk-widget-is-composited (widget)

widget -- a gtk-widget object

True if widget can rely on its alpha channel being drawn correctly.

Whether the widget can rely on having its alpha channel drawn correctly. On X11 this function returns whether a compositing manager is running for the screen of the widget.

Please note that the semantics of this call will change in the future if used on a widget that has a composited window in its hierarchy as set by the gdk-window-composited function.