[Bug 18542] [PATCH] Textured Video (XV) tearing.

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=18542





--- Comment #16 from Pierre Ossman <drzeus-bugzilla at drzeus.cx>  2008-11-20 13:29:04 PST ---
The driver might be sending a quad, but the hardware is definitely handling it
as triangles as there is a huge diagonal tear on my screen. :)

The "nouveau method" of clipping one huge triangle was done after observing how
the blob did it IIRC. I have no idea how to implement it here though, but
someone who is familiar with the R300 3D engine might.

I've done some more testing of the patches here and concluded that this VLINE
waiting is far from obvious. The closest I've come to removing the tears is to
set a range from line 650 to 655 (setting a too small interval caused the wait
to lock up permanently) and waiting for "VLINE on" (bit 3). I still get tears,
but they are equally distributed on the top and bottom.

Not sure how to proceed...


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