RE: IR./PF support for index or palette texture

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Mark Mueller (mmueller++at++es.com)
Tue, 25 Feb 1997 12:12:09 -0700

>----------
>From: Angus Dorbie[SMTP:dorbie++at++bitch.reading.sgi.com]
>Sent: Tuesday, February 25, 1997 11:45 AM
>To: Mark Mueller; 'info-performer++at++sgi.com'
>Subject: Re: IR./PF support for index or palette texture
>
>Just bear in mind that the colour table extension is performed at
>the wrong side of the texture filter for cmap style interpolation
>and so will interpolate through other cmap entries unless you are
>somehow able to exploit spatial colour distribution when generating
>the 8 bit information. The fact that this is a cmap animation rather
>than a simple cmap 8bit image probably saves you from these concerns
>because of the adjacency of incremental values typical of such
>animations.
>
>Cheers,
>Angus

Yeah, I think the limitations won't be a big deal in this case. Do you
know if the IR texture color index table really is 10 bit, like it is
leading me to believe, though the man pages say 8? It would be nice to
support 1k materials. Can I expect normal texel rates in this index mode
or should I expect a performance hit?

Thanks again for your insight,
Mark Mueller
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