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Re: Color tables in idl5.5 [message #28289 is a reply to message #28287]

Fri, 30 November 2001 02:01

Nigel Wade
Messages: 286
Registered: March 1998

Senior Member

Alan Barnett wrote:

>
> I run idl on a LINUX box that supports 24 bit color. The image should
> consist of vertical bands of color, greys from black to white on the
> left, blue, green, yellow and red on the right with several narrow
> bands of various colors and a broad band of black in between. The
> colors are correct when run under idl 5.3, although I do get the error
> message
>
> % Unsupported X Windows visual (class: PseudoColor, depth: 8).
> Substituting default (class: TrueColor, Depth: 24).
>

The reason you get this error is that your graphics card, in common with
the vast majority, is only capable of providing a single visual class at
any one time. With your current visual set to 24 bits, the card is
incapable of providing you with the requested 8 bit visual.

If you are getting the correct colours with the 24 bit visual, can't you
just remove the request for the 8 bit visual to get rid of the error
message?

--
-----------------------------------------------------------
Nigel Wade, System Administrator, Space Plasma Physics Group,
University of Leicester, Leicester, LE1 7RH, UK
E-mail : nmw@ion.le.ac.uk
Phone : +44 (0)116 2523568, Fax : +44 (0)116 2523555

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[Message index]

		Re: Color tables in idl5.5 By: Alan Barnett on Fri, 30 November 2001 05:26
		Re: Color tables in idl5.5 By: Nigel Wade on Fri, 30 November 2001 02:01
		Re: Color tables in idl5.5 By: David Fanning on Thu, 29 November 2001 20:40

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