[haiku-appserver] BWindowScreen results

Hi,

About BWindowScreen. Just ran two more apps:
-my own testing app: this one reports That CanControlFrameBuffer says ' 
NO'. this is incorrect (should be yes, as far as the driver is 
concerned, and that function should check the driver for MOVE_DISPLAY 
existance I think (am not sure though, I have to look it up to be 
sure))

-pageflipper:
Works partly. Acceleration hooks are exported. The ball is drawn, the 
MOVE_DISPLAY function is called, and gets correct coordinates.
The other intermixed curved white lines picture is missing though.

And a bit more info about quitting: After all: Setmode _is_ called. 
It's just not sending valid parameters! (screen size = 0,0, colorspace 
= 0x00000000). Naturally the driver refuses to set that with the effect 
that from the looks of things onscreen: the mode isn't restored, but 
left at the last used mode issued inside BWindowScreen.

Bye!

Rudolf.

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