[Bug 35579] Poor performance in Firefox 4

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Fri Mar 25 05:34:57 PDT 2011


--- Comment #22 from Konstantin Svist <fry.kun at gmail.com> 2011-03-25 05:34:57 PDT ---
(In reply to comment #21)
> (In reply to comment #20)
> > (In reply to comment #19)
> > > R300CheckCompositeTexture: REPEAT_NONE unsupported for transformed xRGB source
> > 
> > Commented out the block that causes this and rendering speed went up to 24FPS
> > in the modified demo.
> Does that result in incorrect rendering? If not, Firefox/Cairo could probably
> use RepeatPad instead of RepeatNone in this case. Otherwise, the fallback could
> be avoided by using a source picture format with an alpha channel.

Didn't look obviously incorrect, though TBH it was moving so fast I wouldn't
notice. I'm sure it can be slowed down and checked pixel-by-pixel.
As for alpha channel -- is the caller (Firefox) made aware of this limitation,
i.e. can it add the alpha channel automatically?

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