More MMX

[Alex Deucher]

On Sat, 13 Nov 2004 15:18:52 +0000, Alan Cox <alan at lxorguk.ukuu.org.uk> wrote:
> On Gwe, 2004-11-12 at 20:20, Soeren Sandmann wrote:
> > Recently I have been fooling around with the compositing manager in
> > the metacity window manager. To get reasonable performance I had to
> > disable all acceleration to get pixmaps allocated in system
> > memory. Otherwise, reading pixels from the framebuffer made dragging
> > translucent windows around too painful.
> 
> The DRI folks have "DMA rectangle from screen to main memory" ability
> that just isn't being used. If you have a good use for that then perhaps
> this should get discussed in detail.
> 

Someone recenly posted a patch to use DMA fro Xv transfers on radeon. 
Michel Daenzer suggested that this could probably be made generic and
used for render transfers as well.

Alex