Path: utzoo!utgpu!water!watmath!clyde!att!ucbvax!husc6!linus!mbunix!ted
From: ted@mitre-bedford.ARPA (Edward J. Ede)
Newsgroups: comp.lang.postscript
Subject: Re: Postscript Underlining
Keywords: Postscript, Underline
Message-ID: <39161@linus.UUCP>
Date: 22 Aug 88 14:43:03 GMT
References: <259@tahoma.UUCP>
Sender: news@linus.UUCP
Reply-To: ted@mbunix (Ede)
Organization: The MITRE Corporation, Bedford, Mass.
Lines: 26

In article <259@tahoma.UUCP> wam6186@tahoma.UUCP (Warren A. Murray) writes:
>Is there anyone out there who knows how to do underlining in
>Postscript?  I need an algorithm that will work with any of
>the Apple LaserWriter Plus fonts at any size.
>
>Mike Haldeman 		      Voice: (206) 237-2577

In all of Adobe's font dictionaries, there exists another dictionary
named FontInfo.  Within FontInfo there are two numbers:
UnderlinePosition and UnderlineThickness.  They are both in the
Character Coordinate System (to use them, divide by 1000 and multiply
by the current point size).  For example, the numbers for Courier are
-82 and 40, so in 12 point, move -.98 points (-82/1000*12) from the
baseline and stroke a line .48 points (40/1000*12) thick.  You can use
the stringwidth operator to get the proper length.

For a more detailed explanation, look in section 5.3 of the red bood,
"Font Dictionaries".  I'd write a procedure for you, but my
PostScript, as of late, is a bit rusty :-(

In a bind, just use italics :-)

Ted Ede -- ted@mitre-bedford.arpa -- The MITRE Corporation -- Burlington Road  
| linus!mbunix!ted -- Bedford MA, 01730 -- Mail Stop B015 -- (617) 271-2524 |
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