--- Alex Deucher <[EMAIL PROTECTED]> wrote:
> On Sat, 18 Dec 2004 10:56:42 +0000, Ian Molton <[EMAIL PROTECTED]> wrote:
> > Mike Mestnik wrote:
> >
> > >>if not, will xinerama be able to use 3D / Xv properly on radeon
> (9000)
> > >>in the near future?
> > >
> > > I don't think there are any plans to support 3D for xinerama.
> >
> > Is there a technical problem or is it just lack of interest?
> >
> >
>
> It's somewhat of a technical problem. It could be done with indirect
> rendering (opengl commands are send through the X server via glx), but
> that is not yet hw accelerated. right now id does work with sw
> rendering. With direct rendering the 3d app talks directly to the
> hardware via libGL, bypassing the Xserver. if you wanted to support
> direct rendering with xinerama you'd have to have some sort of
> intellegent dispatch layer to coordinate rendering between potential
> multiple 3d engines. Once we have hw accelerated indirect rendering,
> we could disable direct rendering when xinerama is active and use
If this realy was the correct solution?! Now that we have futexs(In linux
6 any way) the shm-transportis has overcome one of it's big problems.
Shared memory transports would speed lots(2d, 3d, X11R6) of the drawing
ops up, if it can be implemented so that it's faster then unix sockets.
In any event local client's that don't have access to the drm device would
use the Xserver for rendering, so there is at least one good reason to
implement DXRI(It is direct shared memory to an Xserver rendering).
> glxproxy to dispatch 3d commands to the backend X servers. Mergedfb
> works because it's just one big framebuffer with two viewports looking
> into it so the 3d engine treats it as such. It provides it's own
> version of xinerama so apps know how behave from a screen persective.
>
> Alex
>
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