VisibilityFullyObscured and Composite...

Keith Packard keithp at
Tue Oct 19 19:32:05 PDT 2004

Around 3 o'clock on Oct 20, Roland Mainz wrote:

> How does the "Composite" extension deal with the
> "VisibilityFullyObscured" event ? There are some applications which
> simply stop some activities (like animation playback) when they are
> fully obscured - which makes sense when the window content is not
> visible.

Composite doesn't change the semantics of visibility at all; so 
applications which change their behaviour in the presence of these events 
will probably not work as desired.

I suspect the best answer we might be able to provide would be to have the 
Composite Manager responsible for computing visibility, but the event 
ordering requirements in the core protocol make that rather impractical.

Alternatively, we could just make them always unobscured; that should be 


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