Re: [Chromium-users] Modern Chromium

[Andres F. M. V. <af....@un...>]

What kind of setup (hardware, network, mothership configuration) are you
using when running Ogre on chromium?

 

I know someone I work with had a go at Equalizer, but we ended up choosing
Chromium for precisely the reason you mention, Chromium does not require you
to modify the applications.

 

 

From: Chang Yuan [mailto:cha...@gm...] 
Sent: Thursday, December 11, 2008 1:39 PM
To: Brock Palen
Cc: Andrew Shewmaker; chr...@li...
Subject: Re: [Chromium-users] Modern Chromium

 

Hi all,

Here are my two cents.

SAGE is great for image/video applications, but may not be the best choice
for distributed graphics rendering. It handles OpenGL applications by
intercepting glSwapBuffer call and then streaming the buffer content
(instead of OpenGL calls) to the display tiles. The images are rendered with
inevitable upscaling artifacts which are quite visible on the display tiles.
It does allow running unmodified OpenGL applications, though. 

For my own application, I am using the OGRE rendering engine
(http://www.ogre3d.org), which uses some advanced shader programs (possibly
>OpenGL 1.5). I tried to connect it with Chromium, but the scene is rendered
with missing content (due to the lost shaders I guess) with a very low frame
rate. Has everybody have successful experience with running OGRE through
Chromium? Right now I'm sending the pixel buffers through SAGE as a backup
solution. 

I plan to try another distributed rendering engine, Equalizer
(http://www.equalizergraphics.com/), that claims to support all versions of
OpenGL calls. But it requires modifying the program, which could be a
turn-off for some people.

Best,
Chang


On Thu, Dec 11, 2008 at 7:11 AM, Brock Palen <br...@um...> wrote:

Looks like cglx will not support unmodified GL applications,
From:
http://vis.ucsd.edu/~cglx/docs.html <http://vis.ucsd.edu/%7Ecglx/docs.html> 
Do I need to recompile my OpenGL application against CGLX ?

YES. CGLX needs to intercept a few OpenGL calls to provide a
distributed OpenGL context on your visualization system.

It does look like SAGE will work though:
http://www.evl.uic.edu/cavern/sage/applications.php#wrapper

Thanks,


Brock Palen
www.umich.edu/~brockp <http://www.umich.edu/%7Ebrockp> 
Center for Advanced Computing
br...@um...
(734)936-1985




On Dec 10, 2008, at 3:58 PM, Andrew Shewmaker wrote:

> This might be a good time for me to ask if anyone has compared cglx
> to chromium?
>
> http://vis.ucsd.edu/~cglx/ <http://vis.ucsd.edu/%7Ecglx/> 
>
> Sorry, I can't answer your Chromium questions.  The last powerwall I
> ran it on was RHEL4.
>
> --
> Andrew Shewmaker
>
>


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