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Date:      Sat, 9 Jan 2016 15:37:12 +0100
From:      Bertram Scharpf <lists@bertram-scharpf.de>
To:        freebsd-questions@freebsd.org
Subject:   Re: Printer question
Message-ID:  <20160109143712.GA94931@becker.bs.l>
In-Reply-To: <20160109143456.74f48f42.freebsd@edvax.de>
References:  <5690FCED.7000401@bananmonarki.se> <20160109143456.74f48f42.freebsd@edvax.de>

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Hi,

On Saturday, 09. Jan 2016, 14:34:56 +0100, Polytropon wrote:
> On Sat, 9 Jan 2016 13:28:29 +0100, Bernt Hansson wrote:
> > I have a question about laserjet printers that support HPGL.
> > 
> > How do one switch from ps/pcl/pjl to hpgl the code for doing so under 
> > dos is Ec%#B where # is 0 or 1.
> > 
> > But how to do that with a print filter?
> 
> 	/usr/bin/printf "Ec%1B" || exit 2

First, it is not "Ec" (Letters E and c) but an escape (ASCII 0x1b).

Second, the correct way to switch from PJL to another
language is to say something like

  print "@PJL ENTER LANGUAGE = HPGL2\r\n"

Probably it's a good idea to ensure you're in PJL mode
before giving PJL commands.

  print "\e%-12345X@PJL\r\n@PJL ENTER LANGUAGE = HPGL2\r\n"

Maybe it could be even possible to go the whole way round to
PJL, from there to PCL and then to HPGL.

  print "\e%-12345X@PJL\r\n@PJL ENTER LANGUAGE = PCL\r\n\e%1B"

You can see some output like that when you give the command

  $ echo "showpage" | gs -q -dBATCH -dPARANOIDSAFER -dQUIET -dNOPAUSE -sDEVICE=ljet4pjl -r600 -sOutputFile=- - | less

I will not tie myself to an exact answer because I do not
know which printer model you're using. Just play around
until you found a solution that works.

Bertram


-- 
Bertram Scharpf
Stuttgart, Deutschland/Germany
http://www.bertram-scharpf.de



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