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Re: 24-bit color postscript again [message #13084] Wed, 14 October 1998 00:00
steinhh is currently offline  steinhh
Messages: 260
Registered: June 1994
Senior Member
In article <bowman-0910980821080001@bowman.tamu.edu>
bowman@null.edu (Kenneth P. Bowman) writes:

> I haven't been able to make my 24-bit color postscript plotting work yet,
> so I wrote a simple example to illustrate my problem. You need a 24-bit
> display to make this work and a color postscript printer or viewer.

[..snip..]

> DEVICE, /COLOR, BITS_PER_PIXEL = 8, /SCHOOLBOOK, FONT_SIZE=10, /PORTRAIT

Why do you expect the PS device to behave as if it's 24bit,
when you're setting it to have 8 bits?

I'm not sure if the decomposed color scheme works with PS
even if you set BITS_PER_PIXEL to 24, though (i.e., you have
to go through color tables). David F. will probably come
along with the definitive answer soon, though :-)

Regards,

Stein Vidar
Re: 24-bit color postscript again [message #13085 is a reply to message #13084] Wed, 14 October 1998 00:00 Go to previous message
Amit Ghosh is currently offline  Amit Ghosh
Messages: 7
Registered: July 1998
Junior Member
In article <bowman-0910980821080001@bowman.tamu.edu>,
bowman@null.edu (Kenneth P. Bowman) wrote:
> I haven't been able to make my 24-bit color postscript plotting work yet,

> The program works when plotting to the X device (black in lower left, red
> in lower right, green in upper left, yellow in upper right). When the
> PostScript option is selected (/PRINT), all of the points plot as
> grayscale or white. How do I get the colors to work with Postscript?
>

Ken, that is precisely the problem I have (as well as a similar problem when
using write_gif or write_jpeg). Is this a NEW bud in ver 5.0 ? Because I'm
sure I've done it before with an older IDL.

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