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From: per@parrot.Philips.Com (Paul E. Rutter)
Newsgroups: comp.windows.news
Subject: "reading the contents of a drawing surface"
Message-ID: <30389@philabs.Philips.Com>
Date: 11 Jul 88 18:07:23 GMT
Sender: news@philabs.Philips.Com
Lines: 13

In the June 88 issue of "Unix Review" magazine, there is an article by
Samuel Leffler on NeWS.  On page 69, there is a discussion of reading back
the contents of an image once it's been rendered: this is not in postscript
because it was designed for printers, it is needed for interactive displays,
the usual solution is shadow data structures, which are tedious.  Then he
states that:

"For this reason, the most recent release of NeWS (Version 1.1) provides
PostScript extensions for reading the contents of a drawing surface"

Can someone explain what these extensions are?  We have a 1.1 manual here,
but we have not received our full 1.1 documentation yet.  It does not seem
to be mentioned in the 1.1 manual itself.