From: Alan C. <al...@lx...> - 2003-08-13 23:40:22
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On Mer, 2003-08-13 at 21:31, Nicholas Leippe wrote: > Hrm, thinking about the xv method mentioned earlier, could I run an > xserver on each card, and write a small app that combined xwd and > xsetroot (attached to both xservers) in a loop? > Could it be fast enough, not tear, etc? People did Xshm based 3D in a window stuff using Voodoo2 cards and Xshm type stuff. Unfortunately that means pulling data over PCI which is slow, and sucks totally. To get it to work well you need a card that can push data by DMA from the framebuffer to the other card and kernel side driver code to do the push triggering since XFree86 Get/PutImage methods don't do DMA (tiled DMA Get/PutImage would actually make Xrender fast..) |