On Die, 2003-01-21 at 11:28, Dr Andrew C Aitchison wrote:
> On Mon, 20 Jan 2003, Luugi Marsan wrote:
> 
> > Is there a way for a driver to be informed when X has finished a drawing 
> > operation? Maybe even tell the driver what section has been modified.
> 
> I don't really have any answers.
> 
> If you are an accelerated driver, I'd be tempted to say that the operation
> is finished when the driver has finished its action and returns to the
> server.
> 
> shadowfb does software rendering and then updates rectangles that change.
> The shadowfb and other code in miext handle clip boxes; you might get some
> hints there.

Both shadowfb and the miext shadow module can be used with an
accelerated driver, e.g. the radeon driver uses them to keep front and
back buffer synchronized when pageflipping.


-- 
Earthling Michel D�nzer (MrCooper)/ Debian GNU/Linux (powerpc) developer
XFree86 and DRI project member   /  CS student, Free Software enthusiast

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