Q: Xserver / Composite behavior

[Russell Shaw]

Keith Packard wrote:
> On Sun, 2006-01-08 at 01:46 +0100, Amir Bukhari wrote:
> 
>>What happend when application move it's top level window out side root
>>window. Example: screen is 1200x1024 and a window is moved to 1600,512 which
>>out side screen. Does Xserver will not alow it or it will only not be
>>visable?
>>does Xcomposite will stil render to off-screen pixmap?
> 
> The entire contents of the redirected window are always available,
> independent of position or stacking.

Isn't that a bit inefficient? If you had a 1000x1000 window scrolled
outside the root, it'd be wasting 4MB in a useless pixmap. No wonder
X is so slow;)