render improvements

[Cameron]

Whoops, my apologies. Kmail brought up the wrong message for response.

-Cameron

On Tuesday April 19 2005 3:54 pm, Cameron wrote:
> Bring m video game thingy too (the transparent cartridge).
>
> -Cameron
>
> On Tuesday April 19 2005 1:58 pm, Alan Cox wrote:
> > On Maw, 2005-04-19 at 16:01, Owen Taylor wrote:
> > > Well, no, it's just mildly bad, assuming that you have enough free
> > > scratch space to copy the pixmap into video ram immediately before
> > > compositing it... if compositing is just limited by system => video
> > > bandwidth, that still is pretty good.
> >
> > You might be better off tiling for large operations anyway. The loop
> > then becomes close to maximally efficient when using DMA and DRI to
> > retrieve tiles from the video ram
> >
> > 	kick DMA off for tile n+1
> > 	Render tile n
> > 	polled wait DMA complete n+1
> >
> > overlapping full speed bus transfers with software rendering.
> >
> >
> > _______________________________________________
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>
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