It seems to be quite slow having a a composition playing in a layer. I
had previously used an array of QCRenderer's, and had a
_displayLinkCallBack to pull out frames from the appropriate
compositions to mix in a new view. My old code has broken in Leopard,
and the layers approach is too slow. At least when I was using
separate renderers, I could have them work in a smaller offscreen
size. The resolution would drop, but the speed was good. Is there some
way to do that still with layers somehow?
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