Re: Only 4 multisamples on IR?

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Jean-Francois Panisset (panisset++at++discreet.qc.ca)
Tue, 8 Oct 1996 18:07:13 -0400

  I'm confused as to why I can't get more than 4 multisamples on an IR.
         
  I'm trying to get an OpenGL GLX visual that has RGB and A, double buffer,
  z-buffer, and as many multi-samples as I can get. I can use ircombine to
  set up the framebuffer to a 800x600 VOF and gfxinfo tells me I have extra
  large pixels, but findvis only shows visuals with alpha planes that have 4
  multisamples (8 with no alpha planes). All the VOF's I'm running also have
  Sirius video configured.
         
  Any ideas? Seems like I should be able to get at least 8, maybe 16.

IR has basically two frame buffer formats: RGBA 12/12/12/12 and RGB 10/10/10.
In RGBA, the maximum you can do is 4 multi-samples: in RGB, you can
get a maximum of 8. To convince yourself of this, look at the
output of glxinfo when runnign with small, medium, large and extra-large
pixels.

JF

Jean-Francois Panisset panisset++at++discreet.com
Software Engineer
Discreet Logic

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