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Path: utzoo!utgpu!water!watmath!clyde!rutgers!husc6!seismo!munnari!otc!metro!basser!uqcspe!qfdts!phil
From: phil@qfdts.UUCP
Newsgroups: comp.text
Subject: Re: Making "pic" and "tbl" output look correct on IMAGEN printers!
Message-ID: <1295@qfdts.OZ>
Date: Thu, 4-Jun-87 02:16:42 EDT
Article-I.D.: qfdts.1295
Posted: Thu Jun  4 02:16:42 1987
Date-Received: Sat, 6-Jun-87 07:11:32 EDT
References: <1257@imagen.UUCP>
Organization: Department of Forestry, Queensland, Australia
Lines: 33
Keywords: pic, tbl, IMAGEN, printing, ditroff, DWB, troff
Summary: Verification requested

In article <1257@imagen.UUCP>, SofPasuk@imagen.UUCP (Munach Rvi'i) writes:
> 
> Users of DWB or "ditroff" with AT&T source licenses for same may
> avail themselves of the following source code fixes to force "tbl" to
> use the line drawing functions of device independent troff
> for purposes of drawing lines (the \D'l dx dy' command):
> 
> Source code file "tu.c" should be modified as follows:
> 
I appreciated this information very much, however when
I tried the fixes there were several problems:

  1.  it does not work al all with nroff

It should not be too difficult to add some `.ie t' and `.el'
conditionals in the tbl output to retain the old code for
nroff and use the new code for troff.

  2.  all lines were a little short 
  3.  horizontal lines were too high

I suspect my backend driver for a custom laser printer may
be responsible for 2 above.  Tbl normally uses \(ul's to
draw horizontal lines in tables and I wonder if 3 is due
to lack of compensation for the fact that \(ul's may 
appear lower on the page that a line drawn starting at
the same vertical position.  (i.e. the fix should go
into tbl and not the back end.)

Has anyone else applied these fixes and found them to work
with a `standard' output device (e.g. Autologic APS-5)?

Phil Chadwick.