[info-performer] Re: Onyx4, multiple compositors.

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From: Bernie Kirby (bernie++at++ecr.mu.oz.au)
Date: 07/22/2004 16:05:48

The silence is deafening.
So, I presume that it can't be done. Might as well send the machine back then. 

---
> Compositor confusion. 
> 
> Does anyone have a performer3.1.1 app that uses 
> multiple compositors? 
> 
> We have an onyx4 with 3 compositors, but as yet, we've not been 
> able to effectively get a single performer app to 'drive' the 
> multiple compositors. 
> 
> One setup is this: 
>         2 cards each driving the 3 compositors with a 2x1 vert subdivision. 
> that is, 6 cards in total - 6 screens. 
>         Using the example compositor.C code, and modifying it to use just the 
> first two pipes with the 2x1 vert subdivision, it works fine. 
>         Extending this we tried creating 3 pfCompositors and added the pipes 0,1 
> to the first one, 2,3 to the second and 4,5 to the third.... added channels as 
> needed, called setScreen as appropriate. Doesn't work. Only the first compositor 
> composits, and the others seem to just use the first pipe specified (maybe the 
> others - can't see them) and aren't being composited. 
> 
>         This leads to questions: 
> 
>         How do you tell a pfCompositor which actual compositor to use? 
>         What are the 'rules' for addressing each compositor? 
>         If I wanted to (for example) just run a graphics program on 
>         (say) the third compositor using just it's two cards, how can I 
>         stop performer opening a window on all the 'other' essentially unused pipes? 
> 
> Also, returning to the basic compositor.C example, we tried to just use 
> 2 pipes again, but called setScreen to point to some of the other screens 
> on another compositor. Again, didn't work. 
> 
> Other questions: 
>         What is a software compositor? (see example perfly C code 
>         pfCompositorMode(compositor, PFCOMP_SOFTWARE, 1); ) 
> 
>         What are the PFCOMP_TYPEs PFCOMP_NxM_VERT and PFCOMP_NxM_HORIZ ? again, 
>         used in perfly code, but not in man page. 
> 
>         What does pfCompositorAddCompositor do? It's mentioned in the 
>         man page, but there's no description. 
> 
>          
> Other problems: 
> Calling: 
>         pfCompositorMode(comp, PFLOAD_BALANCE, PF_OFF /* or PF_ON */); 
> 
> Gives this message: 
>         PF Warning: pfCompositor::setMode(), compState is NULL 
> and subsequently, a core dump. 
> 
>          
--
Two wrongs don't make a right ... but two wrights make an aeroplane.

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