[Bug 28670] some 2D apps way too slow, fast with noaccel (regression)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=28670

--- Comment #13 from Alex Deucher <agd5f at yahoo.com> 2010-06-25 06:02:55 PDT ---

(In reply to comment #10)
> (In reply to comment #7)
> > Wouldn't it be possible to have a simple shader that checked whether the sample
> > point was outside the bounds and simply return 0 in that case instead of
> > sampling?
> 
> One problem with that is the required filtering between samples inside and
> outside of the picture; it would require doing the filtering in the shader as
> well. Less efficient than using the hardware texture sampler filtering
> capabilities, though certainly doable.

Also, it can't be accelerated on asics with limited shader capabilities.  It'd
be nice to handle it in a way that's friendly to more limited hw as well.

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