RENDER does not use dma at all, which hinders performance a lot i would think seeing as how render is used from anti-aliased fonts to alphablending and the more programs use either the more render's performance comes into question.
How would RENDER use DMA? I know keithp talks about doing things like DMA'ing video data FROM video memory back to system memory in order to do compositing on the CPU, then send it back, but I think that idea is silly.
The mga driver does some RENDER acceleration, which reads data from the system memory (the alpha texture, for example). This could perhaps done via DMA.
Thomas
-- Thomas Winischhofer Vienna/Austria thomas AT winischhofer DOT net *** http://www.winischhofer.net/ twini AT xfree86 DOT org
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