Re: wherefore CGM?

Joel N. Weber II (
Sat, 7 Dec 1996 14:16:10 -1000 (HST)

Date: Sat, 7 Dec 1996 14:16:10 -1000 (HST)
From: "Joel N. Weber II" <>
To: "Michael H. Lambert" <>
cc: David Perrell <>, HTML <>,
Subject: Re: wherefore CGM? 
In-Reply-To: <>
Message-ID: <>

On Thu, 5 Dec 1996, Michael H. Lambert wrote:

> > So why isn't it supported by graphical browsers?
> I think it would be useful, but I wonder if people raised on 24-bit color
> depth raster graphics see any need for vector graphics.  At any rate,
> there is a MIME type for binary CGM (image/cgm).  The Pittsburgh
> Supercomputing Center (plug!) some time ago developed an application,
> gplot, to display CGM files under X, Microsoft Windows and Macintosh.
> It is freely usable and modifiable, but redistribution would require
> negotiation.  If some enterprising soul would like to try to incorporate
> it into a browser to display CGM images in line, it can be picked up from

[Most people on this list probably don't know that I'm working on writing 
the GNU web browser, named E-scape.  It isn't finished yet, however.  It 
probably will only run on X11.]

I did look at CGM at one point.  However, it looks to me like getting a 
hard copy of the specs would be ridiculously expensive, and gplot doesn't 
exactly strike me as a well-written program.  For example, if I obscure 
its window on X, then expose it, the image doesn't seem to be redrawn.

E-scape will eventually support PostScript.  Is there anything that can 
be done with CGM but not Postscript?

<>                    <>
"...For I have not come to call the righteous, but sinners."  -- Mathew 9:13