EXA for radeon experimental patch

Benjamin Herrenschmidt benh at kernel.crashing.org
Wed Aug 31 15:47:10 PDT 2005

> I'n not taking about migrating the whole framebuffer. Usually the composite 
> operation is restricted to a window that quite a bit smaller, and all you 
> need is a temporary pixmap in main memory that contains a copy of the window. 
> DownloadFromScreen makes exactly this cheap.

It won't do it in many cases afaik. BTW. Somebody knows if radeon
HOSTDATABLIT can be used to blit to host memory or only from host
memory ?

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