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Re: [Groff] Misplaced glyphs

From: Werner LEMBERG
Subject: Re: [Groff] Misplaced glyphs
Date: Sun, 26 Feb 2012 20:27:14 +0100 (CET)

> But what about \(rn and \(br?  The glyphs don't fit well but in
> groff they do.  See the table and text box in my previous mail to
> see how the original troff renders it.  How does groff do it?

In groff, \[ul], \[rn], and \[br] are not real characters.  Instead,
they are defined with drawing requests.  From ps.tmac (dvi.tmac and
the other driver macro files contain very similar code):

  .\" This is designed so that \(ul, \(rn and \(br form corners.
  .char \[ul] \v'.25m'\D'l .5m 0'\v'-.25m'
  .char \[br] \Z'\v'.25m'\D'l 0 -1m''
  .char \[rn] \v'-.75m'\D'l .5m 0'\v'.75m'


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