Re: Multi Channel Option

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Dick Rous (dick++at++demeern.sgi.com)
Mon, 13 Feb 1995 13:57:20 +0100

Hi,
When you want to stick to the three channels, and you want anti-aliasing, your
choice is 4++at++640x480_60.
There is no performance penalty with regard to 3++at++960x680_60 relating to polygon
performance, however, in the 640x480 case, there is a substantial gain in pixel
fill performance, as your total pixel-count now is 921600 as opposed to
1.958400
The fact that you are not use the fourth channel does not matter, you just
don't utilise the total available real-estate.
See also the Multi Channel Option User's Guide, which details the mapping of
the various formats to the total "screen".
Regards,
Dick.

-- 
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Dick Rous
SE
Silicon Graphics BV  
Veldzigt 2      3454 PW      De Meern      The Netherlands
email....:dick++at++demeern.sgi.com
voicemail:5-8160 phone:(31)-3406-21711 fax:(31)-3406-21454
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