keithp at keithp.com
Fri Jun 24 12:31:14 PDT 2005
On Fri, 2005-06-24 at 10:19 -0700, Bill Spitzak wrote:
> So I guess this means that copying areas should be detected. I don't
> think there is any need to work correctly unless opaque copy is being
> done, ie any compositing operation other than src, and any repeating or
> alpha, will produce undefined results.
It's easy enough to require that the operation work as if a temporary
copy of the surface were made and that copy used for any overlapping
operands. A trivial hack would be to do just that, and in fact we
already have that mechanism in place in cairo today.
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