Tables containing rasters

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2 total messages Started by Dave Shield Thu, 07 Jan 1993 16:49

#1919

Author: Dave Shield
Date: Thu, 07 Jan 1993 16:49

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  We have been experiencing problems with printing tables where
one of the cells contains a raster image  (or any other inset
that produces PostScript output directly).
  Rather than printing the raster, the final document appears
with the _text_ of the PostScript instead.

  What appears to be happening is that table uses a troff
diversion to hold the body of each row, to ensure that page
breaks can occur when required.  This means that the troff is
processed twice - once for the diversion, and again when the
macro is executed.
  The PostScript is protected by a single level of transparency,
which is stripped off during the diversion.  Hence, when the macro
is executed, the PostScript is no longer passed through unchanged,
and gets printed like everything else.

  This is all using DITroff.  Groff does what you would expect
(even though it technically shouldn't).

  Any ideas?  (Other than 'use groff'!)

Dave
-------------------------------------------------------------------------------
Dave Shield			      Janet: D.T.Shield@uk.ac.liverpool.compsci
Dept. of Computer Science,	      I'net: D.T.Shield@compsci.liverpool.ac.uk
Liverpool University,		"I _order_ you to help!
PO Box 147,			 You're a machine and you must do
Liverpool, L69 3BX		 what you're told."	T. Pratchett, _Diggers_

Re: Tables containing rasters

#1921

Author: Wilfred.Hansen
Date: Fri, 08 Jan 1993 16:20

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916 bytes

The "official" answer is that rasters don't print in tables.  

Sigh.

It is pleasant to learn that it does work under groff.

The inability of printing rasters in tables has long been a deficiency
of AUIS, but it has not been easy to see how to fix the problem within
the current printing technology.  Perhaps printing technology is 
something we should discuss at the annual meeting.

Fred Hansen
Andrew Consortium, Carnegie Mellon
(412) 268-6788   wjh+@andrew.cmu.edu

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