Re: [info-performer] Multipipe Initialization

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From: Jason Daly (jdaly++at++ist.ucf.edu)
Date: 10/06/2005 08:45:27

Christopher D. Johnson wrote:

>Jason-
>
>Reconfiguring my system to see one "screen" may indeed be the best viable route. My next question before I went in that direction has to do with how things are being drawn. What I'd really need is 2 windows, one window for each LCD, because the lower LCD is touch screen I do not know how tis will effect my detection of the LCD touch points.
>
Yeah, I suppose using two windows would cause the least amount of
changes to occur. I have no experience with touch screens, so I don't
know what reconfiguring your desktop will do to that. I expect that it
will still be possible to get the results you want, though.

>Also, in my appllication, I am using calls like:
>
>glRasterPos2s(x,y);
>
>to set a raster position for things on the screen. How will changing the windowing paradigm affect things of this nature?
>
>

If you use two different windows (instead of a single window with two
channels), this shouldn't change at all.

--"J"

>
>Christopher D. Johnson
>AV-8B Harrier II Simulators
>ISEO Support Team
>Cherry Point, NC
>252-466-4542
>252-466-4538
>
> --- On Thu 10/06, Jason Daly < jdaly++at++ist.ucf.edu > wrote:
>From: Jason Daly [mailto: jdaly++at++ist.ucf.edu]
>To: cubicwts++at++excite.com
> Cc: info-performer++at++sgi.com
>Date: Thu, 06 Oct 2005 10:12:35 -0400
>Subject: Re: [info-performer] Multipipe Initialization
>
>Christopher D. Johnson wrote:<br><br>><br>>Why is it possible for the two seperate executables to work properly and display to their proper screens with two seperate pfPipes (and frankly two seperate instances of Performer) and I am unable to render two pipes in the one executalbe and get that to work?<br>><br>> <br>><br><br>Interesting. My first guess would be that Performer is now trying to <br>get the same visual for both screens, and it's unable to do that, <br>because the second screen won't have GLX support, and therefore, won't <br>have as many visuals available. I could be totally wrong here, however. <br><br>You may be able to explicitly request a different visual for each <br>window. If you run the glxinfo commands I mentioned in my previous <br>e-mail, you'll be able to see which visuals are available on each <br>screen. Then, you can use pfChoosePWinFBConfig() on each window to <br>select visuals that you know are available.<br><br>In any case, the easiest
>solution would be to reconfigure your X desktop <br>to use a single screen, and redo your application to have a single <br>pfPipeWindow, and multiple pfChannels instead. This way, both physical <br>screens will benefit from hardware GLX and you'll only need the one window.<br><br>-- <br><br>--"J"<br><br>"I'm a castaway stranded in a desolate land,<br> I can see the footprints in the virtual sand."<br> --Neil Peart<br><br>
>
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-- 

--"J"

"I'm a castaway stranded in a desolate land,
 I can see the footprints in the virtual sand."
	--Neil Peart

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