| Re: Color Postscript from Object Graphics. [message #11997] |
Fri, 19 June 1998 00:00 |
davidf
Messages: 2866
Registered: September 1996
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Senior Member |
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Terry Figel (terry@cse.ucsc.edu) writes:
> I think I am missing something Fundemental:
> How do I produce color postscript from Object graphics?
> I am doing something like this:
> sState.myprinter->Draw,sState.oView
> sState.myprinter->newdocument
> I did a myprinter->GetProperty for color_model, and
> it returns 0 (RGB) default. It should then produce PS that
> has the same colors as the Screen output right?
I just tried this:
(1) Installed a color PostScript printer device on my
machine. I chose, since I don't have one really,
the HP Color LaserJet PS 5 driver.
(2) Created a printer object:
thisPrinter = Obj_New('IDLgrPrinter')
(3) Looked at the dialog that allows me to select the
printer properties:
ok = Dialog_PrinterSetup(thisPrinter)
Among the properties in the dialog is a droplist to select
one of the printers I have installed. I select the HP Color
LaserJet and the dialog how shows a toggle to switch between
grayscale and color (color was set by default, which I fully
expected). Now, all I have to do is click OK and call the
draw method on the printer.
thisPrinter->Draw, thisView
I just tried my XPlot program. Under the File menu I selected
Print Setup. I chose to make a color Adobe Acrobat color file,
so I selected that printer driver. (The HP Color LaserJet doesn't
have a toggle for sending the output to a file, although
some of the printers I use do.) Set it up for color output,
clicked OK, and presto (well, p-r-e-s-t-o) there was the
color output, just as I expected.
Interestingly, I tried to make a Xerox DocuTech 135 PS2 color
PostScript file (this driver dialog allows me to write to a file),
and although the printer code is executed in exactly the
same way as the Acrobat file is above, the file never gets
any output written to it. I don't know what to make of this.
This happened no matter if I was trying to write color or
grayscale output. Perhaps the DocuTech doesn't know how
to handle this kind of graphics output. I'll look into it.
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting
E-Mail: davidf@dfanning.com
Phone: 970-221-0438
Coyote's Guide to IDL Programming: http://www.dfanning.com/
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