From: Lennart Borgman <lennart.borgman.073@student.lu.se>
Cc: Ralf Angeli <angeli@caeruleus.net>, emacs-devel@gnu.org
Subject: Re: display-mm-width return value off on Windows
Date: Fri, 07 Jul 2006 00:37:08 +0200 [thread overview]
Message-ID: <44AD9094.7010106@student.lu.se> (raw)
In-Reply-To: <ubqs22xnj.fsf@jasonrumney.net>
Jason Rumney wrote:
> Ralf Angeli <angeli@caeruleus.net> writes:
>
>
>> - cap = GetDeviceCaps (hdc, VERTSIZE);
>> + height = round (GetDeviceCaps (hdc, VERTRES)
>> + / GetDeviceCaps (hdc, LOGPIXELSY) * 25.4);
>>
>
>
>> - cap = GetDeviceCaps (hdc, HORZSIZE);
>> + width = round (GetDeviceCaps (hdc, HORZRES)
>> + / GetDeviceCaps (hdc, LOGPIXELSX) * 25.4);
>>
>
> Do these get any more accurate if you move the multiplication to
> before the division?
>
> cap = round (25.4 * GetDeviceCaps (hdc, VERTRES)
> / GetDeviceCaps (hdc, LOGPIXELSY));
>
>
> If so, it might be worth changing. Otherwise, the results look just as
> broken as what we have now. You may have found two cases where the
> results were closer, but it does not follow that they will always be
> so if they are still wildly inaccurate.
>
MS documentation for GetDeviceCaps says:
HORZSIZE Width, in millimeters, of the physical screen.
VERTSIZE Height, in millimeters, of the physical screen.
Should we really try to compensate for bugs in device drivers?
next prev parent reply other threads:[~2006-07-06 22:37 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
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 [this message]
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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