[PATCH 1/3] Add pixman_composite_trapezoids().

[Adam Jackson]

On Wed, 2011-01-12 at 08:49 -0500, Søren Sandmann Pedersen wrote:
> This function is an implementation of the X server request
> Trapezoids. That request is what the X backend of cairo is using all
> the time; by moving it into pixman we can hopefully make it faster.

This looks like it loses the "solid alpha add" optimization from
miTrapezoids.  Am I missing something, or is that just coming later?

- ajax
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