efficiently done by using DrawBuffer (GL_FRONT) and CopyPixels.
I've got a first attempt at accelerating copy pixels on r200 using bitblt,
http://www.skynet.ie/~airlied/patches/dri/r200_copy_pixels_bitblt.diff
Same code would be useful in radeon and r300 so I'd like to merge it ..
However I was hitting a bad case with stencil or scissors enabled or
something (memory is a abit hazy...) not allowing my fast path to be
called.. it was probably simple to resolve,
I had to drop it that point as I moved to working on 2D stuff on i915, and
I've got all my radeons sitting in anti-static bags on my desk..
Dave.
--
David Airlie, Software Engineer
http://www.skynet.ie/~airlied / airlied at skynet.ie
Linux kernel - DRI, VAX / pam_smb / ILUG
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