GNU bug report logs - #20409
24.5; Weird effect when selecting region with DejaVu Sans Mono font on Windows

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Sebastien Vauban <sva-news <at> mygooglest.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.5; Weird effect when selecting region with DejaVu Sans Mono font on
 Windows
Date: Thu, 23 Apr 2015 11:06:45 +0200

Hello,

As you can see on http://screencast.com/t/IMMvaK7Hqa, I see weird space
effects (interline is growing or decreasing when de-selecting text) with
the "DejaVu Sans Mono" font on Windows.

You notice as well some white pixels in the vertical bar of the
boxquote'd text.

Best regards,
  Seb

-- 
Sebastien Vauban

Message #8 received at 20409 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Sebastien Vauban <sva-news <at> mygooglest.com>
Cc: 20409 <at> debbugs.gnu.org
Subject: Re: bug#20409: 24.5;
 Weird effect when selecting region with DejaVu Sans Mono font
 on	Windows
Date: Thu, 23 Apr 2015 12:31:09 +0300

> From: Sebastien Vauban <sva-news <at> mygooglest.com>
> Date: Thu, 23 Apr 2015 11:06:45 +0200
> 
> As you can see on http://screencast.com/t/IMMvaK7Hqa, I see weird space
> effects (interline is growing or decreasing when de-selecting text) with
> the "DejaVu Sans Mono" font on Windows.

Note how the same effect happens even without selecting the text, just
by moving the cursor.

You seem to have some customization that highlights the current line,
which probably has something to do with this effect.  What is that
customization?

Also, if you run "emacs -Q" and select the same font, does the problem
happen when you highlight some portions of the buffer?

Anyway, whatever it is, it affects the pixel height of the lines under
some circumstances, and Emacs reacts as expected: by redrawing the
affected portions of the window.  There's no problem here that I can
spot, just expected behavior.

Message #13 received at 20409-done <at> debbugs.gnu.org (full text, mbox):

From: Stefan Kangas <stefan <at> marxist.se>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: Sebastien Vauban <sva-news <at> mygooglest.com>, 20409-done <at> debbugs.gnu.org
Subject: Re: bug#20409: 24.5; Weird effect when selecting region with DejaVu
 Sans Mono font on Windows
Date: Mon, 30 Sep 2019 02:17:47 +0200

Eli Zaretskii <eliz <at> gnu.org> writes:

>> From: Sebastien Vauban <sva-news <at> mygooglest.com>
>> Date: Thu, 23 Apr 2015 11:06:45 +0200
>>
>> As you can see on http://screencast.com/t/IMMvaK7Hqa, I see weird space
>> effects (interline is growing or decreasing when de-selecting text) with
>> the "DejaVu Sans Mono" font on Windows.
>
> Note how the same effect happens even without selecting the text, just
> by moving the cursor.
>
> You seem to have some customization that highlights the current line,
> which probably has something to do with this effect.  What is that
> customization?
>
> Also, if you run "emacs -Q" and select the same font, does the problem
> happen when you highlight some portions of the buffer?
>
> Anyway, whatever it is, it affects the pixel height of the lines under
> some circumstances, and Emacs reacts as expected: by redrawing the
> affected portions of the window.  There's no problem here that I can
> spot, just expected behavior.

More information was requested, but none was given within 4 years, and
I'm therefore closing this bug report.  If this is still an issue,
please reopen this bug report.

Best regards,
Stefan Kangas

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