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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: display-mm-width return value off on Windows
Date: Fri, 07 Jul 2006 13:18:27 +0300
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> From: Ralf Angeli <angeli@caeruleus.net>
> Date: Fri, 07 Jul 2006 07:56:31 +0200
> 
> * Eli Zaretskii (2006-07-06) writes:
> 
> >> From: Ralf Angeli <angeli@caeruleus.net>
> >> 
> >>                    display-mm-*   display-mm-*
> >>         Real size  without patch  with patch
> >> Width   330mm      320            305
> >> Height  207mm      240            203
> >
> > That is still not a very good approximation, is it?
> 
> The values are more accurate than before.

Not enough, if you ask me.

Do you have some unusual settings for the display?  Maybe that is the
reason why you get skewed numbers; as you see from my other mail, on
my system I get very good results with the current code.