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

Fri Sep 19 13:41:15 PDT 2008

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.
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