[Bug 20505] radeon planar textured video

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=20505





--- Comment #1 from Roland Scheidegger <sroland at tungstengraphics.com>  2009-03-06 09:22:55 PST ---
The patch I posted there is old and not worth looking at.
I've got an improved version, which also does this on r200 class chips, but I
didn't have time to test it yet (and thus likely fails on r200).
As far as performance goes, don't expect too much from it, it only saves a
little cpu time. In fact it could be slower if performance is limited by the
gpu, though a little benchmarking (with rather small source and upscaled to
fullscreen to show a difference) didn't really show a measurable difference (in
contrast to bicubic filtering, which indeed had a larger than 2 times
performance hit - not that it would really matter in that case as it still was
5 times faster than real time).
Though there are other advantages to manual yuv->rgb conversion, it allows
incorporating saturation/hue/contrast/brightness adjustments in the same
transform.


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