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Re: EPS printouts from IDL 4.0.1 [message #5557 is a reply to message #5554]

Thu, 11 January 1996 00:00

hahn
Messages: 108
Registered: November 1993

Senior Member

Hi,

There are two different flavours of PostScript in use, both of them
are needed and are supported by IDL / Wave. The PostScript
driver makes a compatible PostScript so it can be easily changed
from EPS to PS by a normal text editor. But you need to know what
to do.

The basic differences between EPS and PS are:

PS is intended for direct printing. It may contain any number of
pages and it has all information imbedded for the printer as to
position the page, the size of the page etc.

EPS on the contrary is ment for postprocessing by a program
which will add statements to make it printable. *EPS must be
converted to PS to become printable!* A PostScript
printer may wait forever and will not print after having received
and digested a EPS file. (This is due to a missing showpage
command). With an IDL generated EPS file you may simply
append the showpage command and get the page printed.
It may happen as well that a EPS file will produce a blank
page on a printer when you simply add a showpage command
and don't care for the bounding box because the contents of
the page may be completely off the paper. In this case the
bounding box comment will show 4 negative numbers.

One EPS file must not contain more than one page. The EPS file
must contain a Bounding Box statement showing the size of the
page. The IDL driver usually uses positive values in the bounding box.

If IDL output is generated for later annotation it is best to request
an EPS file, do one plot, and close the file. Use a new file for each
plot! Depending on what program is used for annotation it should
convert the EPS to PS which can be directly printed. If that program
does not make an PS file you can simply add a showpage command
and print it. However, the annotation must be on the given page as
neither showpage nor the printers is allowed to make a PS file fit on
the page. This must be done by the postprocessing program.

Norbert Hahn

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[Message index]

		Re: EPS printouts from IDL 4.0.1 By: Kenneth S. Kump on Fri, 12 January 1996 00:00
		Re: EPS printouts from IDL 4.0.1 By: thompson on Thu, 11 January 1996 00:00
		Re: EPS printouts from IDL 4.0.1 By: hahn on Thu, 11 January 1996 00:00
		Re: EPS printouts from IDL 4.0.1 By: Dale Bailey on Thu, 11 January 1996 00:00
		Re: EPS printouts from IDL 4.0.1 By: Hermann Mannstein on Thu, 11 January 1996 00:00
		Re: EPS printouts from IDL 4.0.1 By: Hermann Mannstein on Thu, 11 January 1996 00:00

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