Returns whether surfaces can reasonably be expected to have their alpha channel drawn correctly on the screen.
Check [[email protected]_rgba] for whether the display supports an alpha channel.
On X11 this function returns whether a compositing manager is compositing on this.
On modern displays, this value is always true.
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a `GdkDisplay` |
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Whether surfaces with RGBA visuals can reasonably be expected to have their alpha channels drawn correctly on the screen. |