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Re: device,decomposed=1 question [message #14671 is a reply to message #14586]

Sat, 13 March 1999 00:00

bowman
Messages: 121
Registered: September 1991

Senior Member

In article <MPG.1153439eae020777989721@news.frii.com>, davidf@dfanning.com
(David Fanning) wrote:

> No, it doesn't look the value up in the color table. The three
> numbers *are* the color. There is no color table involved.
> In a 24-bit image, it would be the pixel value in each of the
> red, green, and blue planes that create the value that is actually
> expressed. Again, no color table involved at all.

Actually, some 24-bit devices do have writable color tables. This is the
distinction between TrueColor and DirectColor visuals. I believe our
SGI's have DirectColor visuals, but most of our other 24-bit hardware does
not allow one to change the color maps.

Ken Bowman

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Kenneth P. Bowman, Professor 409-862-4060
Department of Meteorology 409-862-4466 fax
Texas A&M University bowmanATcsrp.tamu.edu
College Station, TX 77843-3150 Change the AT to @

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[Message index]

		device,decomposed=1 question By: Vapuser on Fri, 12 March 1999 00:00
		Re: device,decomposed=1 question By: Vapuser on Tue, 16 March 1999 00:00
		Re: device,decomposed=1 question By: bowman on Sat, 13 March 1999 00:00

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