[PATCH] Avoid an unwanted pixmap migration in EXA when compositing trapezoids

[Eric Anholt]

On Wed, 2007-08-15 at 19:58 +0200, Fredrik Höglund wrote:
> Hi,
> 
> This patch solves the trapezoid migration problem Michel Dänzer described
> in a recent email on this mailing list.
> 
> miTrapezoids creates an alpha pixmap and initializes the contents using
> PolyFillRect, which causes the pixmap to be moved in for acceleration.
> The subsequent call(s) to RasterizeTrapezoid won't be accelerated by
> EXA, which forces the pixmap to be migrated out again.
> 
> This patch avoids the problem by wrapping Trapezoids in EXA, and using
> ExaCheckPolyFillRect to initialize the pixmap contents.
> 
> The code for exaTrapezoids and exaCreateAlphaPicture is copied from
> miTrapezoids and miCreateAlphaPicture. The only change is the call to
> ExaCheckPolyFillRect.
> 
> I'd like to commit this patch as a temporary solution for the 1.4 release.
> I expect it to be replaced later by the generic solution Michel is
> working on.

Looks good to me.

-- 
Eric Anholt                             anholt at FreeBSD.org
eric at anholt.net                         eric.anholt at intel.com

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