[Xorg] Non-fb video driver

Alex Deucher alexdeucher at gmail.com
Thu Aug 19 06:16:36 PDT 2004

On Thu, 19 Aug 2004 08:10:57 +0200 (MET DST), Stanislaw Skowronek
<sskowron at et.put.poznan.pl> wrote:
> Hello!
> I would like to make a SGI Octane (ImpactSR) X driver. The problem with
> this device is that it is a pure graphics pipeline, i.e. there is no
> directly mapped access to the framebuffer.
> Accessing the framebuffer is a rather intricate process involving setup of
> about 20 registers and DMA, so "just copy a virtual fb to screen" would be
> too slow.
> However, I can draw accelerated rectangles, pixmaps, lines, polygons (I
> haven't quite worked the stipple out as yet), alpha blending, gradients
> et al. And acceleration on this card is, well, SGI standard :)

Have you figured out enough to do basic 3D accel as well?


> How does one write a driver for a monster like this: no fb, good accel?
> Stanislaw Skowronek
> --<=>--
>   "You're not as old as the trees, not as young as the leaves.
>    Not as free as the breeze, not as open as the seas."

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