[EXA PATCH] prefer intermediate surface for triangle/trapezoid/addtraps when destination is offscreen

[Maarten Maathuis]

On Fri, Sep 19, 2008 at 10:41 PM, Maarten Maathuis <madman2003 at gmail.com> wrote:
> In my experience UploadToScreen is faster than DownloadFromScreen, so
> it seems prudent to give this software rendered operation a reasonable
> chance should someone use an existing (offscreen) mask.
>
> Let me know what you think.
>
> Maarten.
>

After posting i noticed a rather big mistake (one of the offsets to
fbAddTraps was wrong).
So here is a new version.

Maarten.
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