> >     Xapp->sharedmemory->X->gart->Video Card
> > 
> > but unless things have changed XFree86 agpgart doesn't support remapping the
> > shared memory pages directly into the GART and referencing them.
> 
> So it doesn't work with the XVideo extension?

XVideo may well use the GART to do image transfer if appropriate, but it
will be doing one PC memory copy typically before X/Gart do their bit.

> Do you know any example that works with by making yuv data available to 
> the gfx card? A deinterlacing app would probably benefit from using such 
> a transport.

XVideo can supply YUV format data to the card, but it does go via the server
at a small cost. I don't know if any of the DRI capable cards support YUV
textures



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