be expected to have their alpha channels drawn correctly on the screen.
Display.isComposited
bool isComposited()Returns whether surfaces can reasonably be expected to have their alpha channel drawn correctly on the screen.
Check [gdk.display.Display.isRgba] for whether the display supports an alpha channel.
On X11 this function returns whether a compositing manager is compositing on display.
On modern displays, this value is always true.
Returns
Whether surfaces with RGBA visuals can reasonably