From: Angus Dorbie (dorbie++at++sgi.com)
Date: 05/02/2000 01:44:20
PFCHAN_SWAPBUFFERS != PFCHAN_SWAPBUFFERS_HW
This will sync up the channels on a single image system, the hardware
sync is only marginally better.
Cheers,Angus.
Calvin Lu wrote:
>
> By default, Vega enables the following,
>
> k = PFCHAN_SCENE | PFCHAN_STRESS | PFCHAN_SWAPBUFFERS |
> PFCHAN_STATS_DRAWMODE | PFCHAN_CULLFUNC | PFCHAN_DRAWFUNC;
> pfChanShare( pfchan, k);
>
> The vgObservChanShareMask function can be used to enable the
> PFCHAN_NEARFAR, PFCHAN_LOD, and PFCHAN_LPOINTFUNC bits. Another
> way to manipuate the channel share group is to retrieve the
> pfChannel pointer from vgChannel and use pfChanShare to change
> the mask directly.
>
> cLu
>
> > -----Original Message-----
> > From: Luc Leblanc [mailto:luc.leblanc++at++AdacelCanada.com]
> > Sent: Monday, May 01, 2000 12:44 PM
> > To: Performer Mailing List; Vega Mailing List
> > Subject: Re: swap ready connector
> >
> >
> > Hi.
> >
> > Does anybody know how performer channel groups are handled
> > (more specifically
> > the PFCHAN_SWAPBUFFERS_HW token) by Vega on SGI ?
> >
> > Thanks...
> >
> > Angus Dorbie wrote:
> >
> > > It can be important when you intend to run at less than the vertical
> > > retrace rate of video, especially if you unexpectedly frame
> > extend but
> > > in practice, with the right pfPhase set the it isn't essential on a
> > > single image system. It is essential when using multiple
> > systems. You
> > > should try and channel share PFCHAN_SWAPBUFFERS_HW and wire
> > swapready
> > > even on a single image system though, it's easy enough.
> > >
> > > CHeers,Angus.
> > >
> > > Luc Leblanc wrote:
> > > >
> > > > Hi.
> > > >
> > > > We're using a Vega 3.4 application on a 6 pipes Onyx2
> > IR2. The pipes
> > > > are properly genlocked (according to gfxinfo -v and to
> > the Genlock In
> > > > and the Genlock Loop Through connectors) but the Swap
> > Ready connectors
> > > > are not connected together. How important is it to connect those
> > > > connectors together ? What impact can that have on the
> > frame rate ?
> > > >
> > > > Thanks...
> >
> > --
> > Luc Leblanc
> > Software Designer
> > Adacel Technologies Canada Ltee
> > EMail: leblanc++at++adacelcanada.com
> > Tel: 450-672-1114 #270
> > Fax: 450-672-4434
> >
> >
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