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Re: 24 bit colors in IDL [message #13644 is a reply to message #13280]

Fri, 20 November 1998 00:00

davidf
Messages: 2866
Registered: September 1996

Senior Member

William Daffer (vapuser@catspaw.jpl.nasa.gov) writes:

> On Unix machines, I suspect this is a limitation of X. Don't know
> about Window's machines. Also, is it the same in the
> Windows version? Does calling device,get_visual_name=name set the
> visual class?

There is no such thing as "visual classes" really on
Windows machines. I guess you could say you change
"visual classes" by selecting properties of your
video adapter. This is usually done through a
Control Panel interface. The Get_Visual_Name
keyword returns "class names" that are consistent
with UNIX machines, I think. (I'm going to get
into some trouble with this answer, I can tell
already.)

> Can PV-Wave change the visual class? >

I may have been mistaken about this. I do
remember that if you had no windows open you could
change the number of colors in your IDL session. I'm
not sure about changing visual classes. At the time
I worked with PV-Wave there only was one visual class
for all intents and purposes. :-)

> Yes, cheers. I've just started working in 24bit color, and alot of
> my code is implicitly 8-bit. It would be nice to be able to determine
> whether the visual class has been set yet, without actually setting
> it. Unless I've missed something, it doesn't look like that is
> possible.

Apparently not. Have you brought this to RSI's attention?

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438 E-Mail: davidf@dfanning.com
Coyote's Guide to IDL Progamming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155

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[Message index]

		24 bit colors in IDL By: Richard Penrose on Tue, 03 November 1998 00:00
		Re: 24 bit colors in IDL By: davidf7203 on Fri, 06 November 1998 00:00
		Re: 24 bit colors in IDL By: philip aldis on Fri, 06 November 1998 00:00
		Re: 24 bit colors in IDL By: davidf on Thu, 12 November 1998 00:00
		Re: 24 bit colors in IDL By: Richard Penrose on Wed, 11 November 1998 00:00
		Re: 24 bit colors in IDL By: Andy Bristow on Tue, 17 November 1998 00:00
		Re: 24 bit colors in IDL By: Nigel Wade on Thu, 19 November 1998 00:00
		Re: 24 bit colors in IDL By: davidf on Wed, 18 November 1998 00:00
		Re: 24 bit colors in IDL By: Nigel Wade on Wed, 18 November 1998 00:00
		Re: 24 bit colors in IDL By: Andy Bristow on Wed, 18 November 1998 00:00
		Re: 24 bit colors in IDL By: davidf on Tue, 17 November 1998 00:00
		Re: 24 bit colors in IDL By: davidf on Fri, 20 November 1998 00:00
		Re: 24 bit colors in IDL By: Vapuser on Fri, 20 November 1998 00:00
		Re: 24 bit colors in IDL By: davidf on Thu, 19 November 1998 00:00
		Re: 24 bit colors in IDL By: Vapuser on Thu, 19 November 1998 00:00

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