Re: SwapBuffers

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Angus Dorbie (dorbie++at++multipass.engr.sgi.com)
Fri, 26 Sep 1997 08:15:35 -0700

On Sep 25, 3:30pm, Dan Hagens wrote:
> Subject: SwapBuffers
> Performers,
>
> I am having a problem with all of my channels swapping buffers at the
> same time. I have 3 pipes with 2 channels for each pipe. Each channel is
set
> for left eye and right eye viewing for stereo. The two channels on each pipe
> swap buffers at the same time but they don't all swap at the same time. I
> tried
> setting the PFCHAN_SWAPBUFFERS in the mask but that seems to work only on
> channels that are attached using pfAttachChan. Does anyone know of a way to
> swap all of the channels at the same time. Thanks.
>

You need to genlock the pipes share the channels PFCHAN_SWAPBUFFERS
attribute, you must also wire the swapready connectors on the pipes.
You will get better results if you run a pfPhase of PFPHASE_LIMIT,
I find I don't need to wire swapready when I do this.

Cheers,Angus.
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