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Re: [MANTA] Re: Problems compiling Manta on the SGI Prism


Chronological Thread 
  • From: Shreekanth Pavar <shreekanth.pavar@ucl.ac.uk>
  • To: Solomon Boulos <boulos@cs.utah.edu>
  • Cc: James Bigler <bigler@sci.utah.edu>, manta@sci.utah.edu, Steven Manos <s.manos@ucl.ac.uk>
  • Subject: Re: [MANTA] Re: Problems compiling Manta on the SGI Prism
  • Date: Mon, 19 Feb 2007 14:01:03 +0000
Quoting Solomon Boulos <boulos@cs.utah.edu>:

Hi Shreekanth,

I'm surprised you're getting anything about VBOs, do you mean PBOs (pixel buffer objects). Manta uses these to send the frame to the screen as fast as possible (glDrawPixels is much slower usually than PBOs)


Apologies - yes, that is what I meant. I'm not familiar with either, hence the
confusion but I found the comment below in the Manta source and wanted to find
out why these extensions are unavailable.

PureOpenGLDisplay.cc:// Pixel/Vertex Buffers are unavailable on some platforms,
notably Prism.

I also had 2 follow-on queries:

Will their abscence adversely impact the performance of Manta on the Prism ?
Do you know if they also unavailable on the SGI Altix  ?





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