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[Octave-bug-tracker] [bug #54560] Unable to send large figures to the de

From: Pantxo Diribarne
Subject: [Octave-bug-tracker] [bug #54560] Unable to send large figures to the default printer
Date: Thu, 23 Aug 2018 10:22:26 -0400 (EDT)
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Firefox/52.0


                 Summary: Unable to send large figures to the default printer
                 Project: GNU Octave
            Submitted by: pantxo
            Submitted on: Thu 23 Aug 2018 02:22:24 PM UTC
                Category: Plotting with OpenGL
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Unexpected Error
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: GNU/Linux



The simple command bellow for printing the current figure to the default
printer fails on linux:

demo material 1
print -dpsc

I get the error bellow:

/usr/bin/lpr: Error - unable to queue from stdin - Connexion ré-initialisée
par le correspondant.
GPL Ghostscript 9.20: ERROR: ioerror (-12) on closing ps2write device.

I changed __opengl_print__.m so that it prints the commands onscreen and here
is what I observe 

/usr/bin/gs -dQUIET -dNOPAUSE -dBATCH -dSAFER -dAutoRotatePages=/None
-sDEVICE=ps2write -dLanguageLevel=2 -dEmbedAllFonts=true -dEPSCrop
-sPAPERSIZE=letter -dFIXEDMEDIA -sOutputFile="-" /tmp/oct-x4iz82.ps - |
/usr/bin/lpr -l ; rm /tmp/oct-x4iz82.ps

While when printing to a ps file here is the command:

/usr/bin/gs -dQUIET -dNOPAUSE -dBATCH -dSAFER -dAutoRotatePages=/None
-sDEVICE=ps2write -dLanguageLevel=2 -dEmbedAllFonts=true -dEPSCrop
-sPAPERSIZE=letter -dFIXEDMEDIA -sOutputFile="/tmp/toto.ps" /tmp/oct-O5mLnt.ps
- ; rm /tmp/oct-O5mLnt.ps

The main difference, except the use of lpr, is that ghostscript writes to
stdout instead of a file. 

This is not a problem for small figures (e.g plot (1:10)) and the workaround
is to print to ps first and then use lpr manually:

demo material 1
print -dpsc /tmp/toto.ps
system ("lpr -lr /tmp/toto.ps")



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