| Re: Need Help with PRINTER Problem [message #21338] |
Mon, 21 August 2000 00:00 |
promashkin
Messages: 169
Registered: December 1999
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Senior Member |
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I did yet another test. I can't save to .ps from dialog_printersetup(),
but I can from dialog_printjob(). So I made a .ps file through Phaser
840 color laser jet driver, and it has 200 shades of pure gray. No yellow.
Cheers,
Pavel
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| Re: Need Help with PRINTER Problem [message #21339 is a reply to message #21338] |
Mon, 21 August 2000 00:00  |
davidf
Messages: 2866
Registered: September 1996
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Senior Member |
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Pavel Romashkin (promashkin@cmdl.noaa.gov) writes:
> I tried to run the code. On Phaser 550, color laser jet, the image came
> out in shades of gray (at least I can't see any color comparing to the
> output of the same code to a b/w LaserJet 4+). I also tried to set the
> device to PS (which is fairly useless as it will not use printer
> driver), with color enabled (in dialog_printer I have no option to print
> to a file - why?). I get a grayscale image with 13 shades of gray. I
> checked the indexed color table of a post script image and there are
> only gray shades.
Preliminary results that are coming in indicate that
the problem appears to be confined to PostScript printers.
I suspect a bug in how PostScript output is written to the
printer. The work-around in my code is just to reload
the image colors once I have loaded the last drawing color
and before I display the image:
TVLCT, r, g, b, /Get
TVLCT, r[0:imagecolors-1], g[0:imagecolors-1], b[0:imagecolors-1]
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438 E-Mail: davidf@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155
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| Re: Need Help with PRINTER Problem [message #21340 is a reply to message #21338] |
Mon, 21 August 2000 00:00 |
promashkin
Messages: 169
Registered: December 1999
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Senior Member |
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I tried to run the code. On Phaser 550, color laser jet, the image came
out in shades of gray (at least I can't see any color comparing to the
output of the same code to a b/w LaserJet 4+). I also tried to set the
device to PS (which is fairly useless as it will not use printer
driver), with color enabled (in dialog_printer I have no option to print
to a file - why?). I get a grayscale image with 13 shades of gray. I
checked the indexed color table of a post script image and there are
only gray shades.
Cheers,
Pavel
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