[PATCH xserver 1/3] glamor: Scissor rectangle drawing to the bounds of the rects.

[Keith Packard]

Eric Anholt <eric at anholt.net> writes:

> Scissors provide a critical hint to tiled renderers as to what tiles
> need to be load/stored because they could be modified by the
> rendering.
>
> The bounds calculation here is limited to when we have a small number
> of rects (large enough to cover rounded window corners, but probably
> not xeyes) to avoid overhead on desktop GL.
>
> No performance difference on i965 with x11perf -rect1 -repeat 1 -reps
> 10000 (n=50)
>
> v2: Clamp rectangle bounds addition.

For the series:

        Reviewed-by: Keith Packard <keithp at keithp.com>
        
-- 
-keith
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