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Re: Setup linewidth for Laserwriter
- To: email@example.com, firstname.lastname@example.org
- Subject: Re: Setup linewidth for Laserwriter
- From: Vincent Keunen <email@example.com>
- Date: Wed, 3 Feb 1993 10:12+0200
- In-reply-to: <93Jan30.firstname.lastname@example.org>
- Reply-to: email@example.com
Date: Sun, 31 Jan 1993 00:22+0200
From: "Mark A. Tapia" <firstname.lastname@example.org>
On Sat Jan 30 07:09:30 1993 Martin Emele writes:
Does anyone know how to change the default linewidth setup for
printing on a laserwriter. I'm using Mark A. Tapia's print-u.lisp
utility for printing a PICT graphic on a Laserwriter IIg. I set the
Quickdraw pensize to #@(1 1) and it looks fine on the screen even
after scaling but if I print it on the Laserwriter the lines show up
as thick lines (probably 1 point lines).
Martin describes a typical problem with "displaying" graphics on
devices with different resolutions. When using Quckdraw, there appears
to be no way to "draw" a line that is less than one pixel wide.
For a standard Mac screen this is 1/72". This is a limitation of
Quickdraw which does not occur in PostScript.
One way to make the change is to specify that the picture is being drawn
at a scale of 4*75 pixels per linear inch. Another is to issue all the
drawing commands for lines as if the document were 4x its real size
and then forcing a print reduction of 25%. Lines drawn at 1 pixel in the
in the enlargement will be roughly 1/4 the size in the "printed" version.
If you have lots of complex printing, you might consider getting CLIM
(Common Lisp Interface Manager) for MCL. It has a full drawing
substrate and anything that you can do with clim drawing functions can
be wrapped by a "with-output-to-postscript-stream" that will generate
the postscript file for you. You have a lot more options with that.
Moreover, CLIM is not device specific, you can work in any resolution
you want. (you will also get cross-platform portability, but you will
lose the mac specifics like quicktime, applescript,...).
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Keunen Vincent Network Research Belgium
R&D, Software Engineer Parc Industriel des Hauts-Sarts
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