Performance of XRenderCompositeTrapezoids in the aliased case

Michel Dänzer michel at
Fri Feb 6 09:25:55 PST 2009

On Tue, 2009-02-03 at 04:10 +0200, Mart Raudsepp wrote:
> I shamefully admit I haven't actually gotten around to pinpoint this
> glyph perf regression with 101% certainty at Pict_A8 OpAdd's, but
> logically that should be the case.

Does the attached patch help? It should promote a8 masks to argb if the
driver can't composite to a8. Beware, I only tested that it compiles and
doesn't seem to break anything else.

P.S. Moving to the xorg-devel list.

Earthling Michel Dänzer           |      
Libre software enthusiast         |          Debian, X and DRI developer
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