| Re: set_plot,'PS' and accurate colors? [message #33473 is a reply to message #33471] |
Wed, 08 January 2003 12:58   |
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Paul Van Delst[1]
Messages: 1157
Registered: April 2002
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Senior Member |
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dave wrote:
>
> David Fanning wrote:
>
>> dave (knapp@rtt.colorado.edu.NOSPAM) writes:
>>>
>>> It's looking like IDL can't plot output graphics (PS, metafile etc) with more than
>>> 256 colors ever, is that true?
>>
>> 256 colors out of a palette of 16.7 million. Yes,
>> that is what it means to be an 8-bit device. Computers
>> used to be like this in the old days. :-)
>
> Sigh,
>
> So how does one print anything in IDL with good color selection?
methinks there may a problem with how your system be setup. plotting in color in IDL
(direct graphics at least) is pretty easy - especially stuff like you have described.
- What version of IDL are you using?
- How many bit planes are you set up to use? 8,16,24? (xdpyinfo should tell you that - for
unix at least)
- If 8 bit planes, what is the output when you do:
window, /free, /pixmap, colors = -5
plot, [ 0 ]
wdelete, !d.window
print, 'Number of colors is ', !d.n_colors
print, 'Color table size is ', !d.table_size
*immediately* after starting IDL?
Depending on what your system colour depth is and how many color-intensive applications
(e.g. web browser, fancy editor, movie player, etc) you have running, you may have simply
run out of colours.
paulv
--
Paul van Delst
CIMSS @ NOAA/NCEP/EMC
Ph: (301)763-8000 x7274
Fax:(301)763-8545
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