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From: Eli Zaretskii <eliz@gnu.org>
Cc: emacs-devel@gnu.org
Subject: Re: display-mm-width return value off on Windows
Date: Fri, 07 Jul 2006 00:08:59 +0300	[thread overview]
Message-ID: <uirmaqw44.fsf@gnu.org> (raw)
In-Reply-To: <e8jih2$pn0$1@sea.gmane.org> (message from Ralf Angeli on Thu, 06 Jul 2006 19:50:26 +0200)

> From: Ralf Angeli <angeli@caeruleus.net>
> Date: Thu, 06 Jul 2006 19:50:26 +0200
> 
> On Windows the return values of `display-mm-width' and
> `display-mm-height' don't really reflect the screen width and height
> in millimeters.  I attached a patch which yields more realistic
> results.

Thanks.

> In my case:
> 
>                    display-mm-*   display-mm-*
>         Real size  without patch  with patch
> Width   285mm      370            279
> Height  215mm      277            203
> 
> For a preview-latex user who originally reported the problem:
> 
>                    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?

> -  cap = GetDeviceCaps (hdc, VERTSIZE);
> +  height = round (GetDeviceCaps (hdc, VERTRES)
> +		  / GetDeviceCaps (hdc, LOGPIXELSY) * 25.4);

What is this magic constant 25.4?  I think we at least should use a
single macro instead of having the literal constant scattered across
the sources.

  reply	other threads:[~2006-07-06 21:08 UTC|newest]

Thread overview: 78+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-07-06 17:50 display-mm-width return value off on Windows Ralf Angeli
2006-07-06 21:08 ` Eli Zaretskii [this message]
2006-07-06 21:25   ` David Kastrup
2006-07-07  5:56   ` Ralf Angeli
2006-07-07 10:18     ` Eli Zaretskii
2006-07-07 10:22     ` Eli Zaretskii
2006-07-07 12:05       ` Lennart Borgman
2006-07-07 16:54       ` Ralf Angeli
2006-07-08 12:58         ` Eli Zaretskii
2006-07-08 13:23           ` Lennart Borgman
2006-07-08 14:42             ` Eli Zaretskii
2006-07-08 21:27             ` Jason Rumney
2006-07-08 22:23               ` David Kastrup
2006-07-08 23:03                 ` Jason Rumney
2006-07-09  7:36                   ` Ralf Angeli
2006-07-09  8:03                     ` David Kastrup
2006-07-09  7:41               ` Ralf Angeli
2006-07-09  8:05                 ` David Kastrup
2006-07-09 18:37                 ` Eli Zaretskii
2006-07-10 10:30                   ` Kim F. Storm
2006-07-10 10:45                     ` David Kastrup
2006-07-10 13:29                       ` Jason Rumney
2006-07-10 14:19                         ` David Kastrup
2006-07-10 21:28                           ` Jason Rumney
2006-07-10 22:05                             ` David Kastrup
2006-07-10 20:12                     ` Eli Zaretskii
2006-07-10 23:17                       ` Kim F. Storm
2006-07-10 23:22                         ` David Kastrup
2006-07-11 18:43                   ` Ralf Angeli
2006-07-12 13:07                     ` Kim F. Storm
2006-07-12 19:22                     ` Richard Stallman
2006-07-13 19:38                       ` Ralf Angeli
2006-07-13 19:59                         ` David Kastrup
2006-07-14 17:03                           ` Richard Stallman
2006-07-14 18:16                           ` Stefan Monnier
2006-07-14 18:33                             ` David Kastrup
2006-07-14 21:37                               ` Stefan Monnier
2006-07-15 22:06                                 ` Ralf Angeli
2006-07-16 17:04                                   ` Ralf Angeli
2006-07-14 17:03                         ` Richard Stallman
2006-07-09  9:31               ` Jan Djärv
2006-07-08 17:40           ` Robert J. Chassell
2006-07-06 22:09 ` Jason Rumney
2006-07-06 22:37   ` Lennart Borgman
2006-07-07  5:50   ` Ralf Angeli
2006-07-07  9:09     ` Eli Zaretskii
2006-08-05 14:50 ` Ralf Angeli
2006-08-19 15:15   ` Ralf Angeli
2006-08-19 15:37     ` David Kastrup
2006-08-19 16:31     ` Jason Rumney
2006-08-19 17:54       ` Ralf Angeli
2006-08-19 22:34         ` Jason Rumney
2006-08-20  8:19           ` Ralf Angeli
2006-08-21  9:06             ` Eli Zaretskii
2006-08-21  9:17               ` Lennart Borgman
2006-08-21 10:22                 ` Eli Zaretskii
2006-08-21 10:36                   ` David Kastrup
2006-08-21 11:45                     ` Jason Rumney
2006-08-21 11:55                       ` David Kastrup
2006-08-21 10:43                   ` Lennart Borgman
2006-08-21 14:07                     ` Eli Zaretskii
2006-08-21 15:03                       ` Lennart Borgman
2006-08-21 19:22               ` Ralf Angeli
2006-08-21 23:10                 ` Eli Zaretskii
2006-08-22  5:57                   ` Ralf Angeli
2006-08-22 19:16                     ` Ralf Angeli
2006-08-22 21:38                       ` Kim F. Storm
2006-08-23 18:31                         ` Ralf Angeli
2006-08-23 22:44                           ` Kim F. Storm
2006-08-24 16:14                             ` Ralf Angeli
2006-08-24 20:18                               ` Kim F. Storm
2006-08-25 16:38                                 ` Ralf Angeli
2006-08-25 22:28                                   ` Kim F. Storm
2006-08-21 23:25                 ` Jason Rumney
2006-08-22  5:51                   ` Ralf Angeli
2006-08-22  7:46                     ` Jason Rumney
2006-08-22 19:24                       ` Ralf Angeli
  -- strict thread matches above, loose matches on Subject: below --
2006-07-14 23:55 Robert J. Chassell

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