Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!caen!settle.engin.umich.edu!amadi
From: amadi@caen.engin.umich.edu (Amadi Nwankpa)
Newsgroups: comp.lang.postscript
Subject: Display Postscript 'image' operator problems
Keywords: Display Postscript image colorimage RS/6000
Message-ID: <1991May8.014036.8916@engin.umich.edu>
Date: 8 May 91 01:40:36 GMT
Sender: news@engin.umich.edu (CAEN Netnews)
Organization: The University of Michigan, Ann Arbor
Lines: 23


  I am running a modified version of the dpsexec Display Postscript
program that comes with IBM Rs/6000s .  The modified version
of this postscript interpreter uses  an X pixmap instead of an
X window as its context, then dumps the pixmap in XWD format. 
This pixmap is  1860x2360 pixels in size .  What  I do is translate
and scale postscript images to fit inside this larger context.
The reason for doing this is to get a higher resolution XWD file
to print to a color non-postscript printer. 
   This all works fine except for images which use the 'image' and
'colorimage' operators .  It seems that these operators don't produce
any marks on the page past a certain x pixel value (approx x = 1200). 
With postscript images with a combination of bitmaps,text and lines
the lines and text appear fine , but any portion of the bitmap 
that has an x value > 1200 is not shown. I wonder is this
a Display Postscript feature and if so is there any way around it.  

            


                             Amadi Nwankpa
                             CAEN
                             Univ. of Michigan