[Intel-gfx] [ANNOUNCE] xf86-video-intel 188.8.131.523
barry.scott at onelan.co.uk
Thu Apr 16 10:59:50 PDT 2009
Carl Worth wrote:
> On Thu, 2009-04-16 at 17:56 +0100, Barry Scott wrote:
>> The code you have to prevent tearing will only work without compositing.
> Yes, I just verified that if I simply start xcompmgr then I get tearing
> once again.
>> What is needed is a change to the compositing app to avoid the tearing.
>> Which I think you might have exposed the hooks to with the sync to scan line
>> stuff, so long as that is independent of XV.
> Actually, I don't think there's anything exposed yet here that the
> application can get at. So we'll need to think a bit about how to get
> arbitrary applications to ask for and get tear-free behavior.
> But yes, the scanline-based waiting will be very useful, so we just need
> to find a good way to let applications get at this.
The other feature you have that we might used to solve this problem is
the "swap buffers"
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