GNU bug report logs - #31203
26.1; Fringe and toolbar bitmaps unscaled on Windows 10 HiDPI display

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

From: Keith Russell <keithrussell42 <at> fastmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 26.1; Fringe and toolbar bitmaps unscaled on Windows 10 HiDPI display
Date: Tue, 17 Apr 2018 21:07:34 -0400

Running on Windows 10 with a high resolution display (3840 x 2160)
the fringe bitmaps and toolbar buttons are so tiny as to be almost
indistinguishable from dots. Scrollbars and menus are fine and the
fonts look stunning. If I set the compatibility option to "override
application" and let the system scale then it's the right size but
fuzzy. I couldn't find anything in the bug reports. The only
thing I found in the Changelog was the change to make Emacs
DPI aware on Windows but that was back in 2015.


In GNU Emacs 26.1 (build 1, x86_64-w64-mingw32)
 of 2018-04-10 built on CIRROCUMULUS
Repository revision: c267421647510319d2a70554e42f0d1c394dba0a
Windowing system distributor 'Microsoft Corp.', version 10.0.16299
Recent messages:
; is undefined
Finding changes in ....
Commands: d, s, x, u; f, o, 1, 2, m, v; ~, %; q to quit; ? for help.
(Wraparound for next marked file)
dired-next-marked-file: No next marked file
M-ESC C-M-p is undefined
Mark saved where search started
Grep finished with 265 matches found
Parsing gtkutil.c (LL)...done
Parsing image.c (LL)...done

Configured using:
 'configure --without-dbus --host=x86_64-w64-mingw32
 --without-compress-install 'CFLAGS=-O2 -static -g3''

Configured features:
XPM JPEG TIFF GIF PNG RSVG SOUND NOTIFY ACL GNUTLS LIBXML2 ZLIB
TOOLKIT_SCROLL_BARS THREADS LCMS2

Important settings:
  value of $LANG: ENC
  locale-coding-system: cp1252

Major mode: C/*l

Minor modes in effect:
  diff-auto-refine-mode: t
  shell-dirtrack-mode: t
  winner-mode: t
  smartparens-global-mode: t
  smartparens-mode: t
  recentf-mode: t
  savehist-mode: t
  counsel-mode: t
  ivy-mode: t
  show-paren-mode: t
  global-semanticdb-minor-mode: t
  global-semantic-idle-scheduler-mode: t
  semantic-idle-scheduler-mode: t
  semantic-mode: t
  which-function-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t
  abbrev-mode: t

Load-path shadows:
None found.

Features:
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semantic/dep semantic/bovine semantic/analyze/refs semantic/db-find
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base16-default-light-theme bookmark base16-theme pcase autoload
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message format-spec rfc822 mml mml-sec epa derived epg gnus-util rmail
rmail-loaddefs mailabbrev gmm-utils mailheader mm-decode mm-bodies
mm-encode mail-utils network-stream starttls url-http tls gnutls
mail-parse rfc2231 rfc2047 rfc2045 mm-util ietf-drums mail-prsvr url-gw
nsm rmc puny url-cache url-auth url url-proxy url-privacy url-expand
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Memory information:
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 (symbols 56 40727 8)
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 (vectors 16 54735)
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Message #8 received at 31203 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Keith Russell <keithrussell42 <at> fastmail.com>
Cc: 31203 <at> debbugs.gnu.org
Subject: Re: bug#31203: 26.1;
 Fringe and toolbar bitmaps unscaled on Windows 10 HiDPI display
Date: Wed, 18 Apr 2018 09:54:14 +0300

> From: Keith Russell <keithrussell42 <at> fastmail.com>
> Date: Tue, 17 Apr 2018 21:07:34 -0400
> 
> 
> Running on Windows 10 with a high resolution display (3840 x 2160)
> the fringe bitmaps and toolbar buttons are so tiny as to be almost
> indistinguishable from dots. Scrollbars and menus are fine and the
> fonts look stunning. If I set the compatibility option to "override
> application" and let the system scale then it's the right size but
> fuzzy. I couldn't find anything in the bug reports. The only
> thing I found in the Changelog was the change to make Emacs
> DPI aware on Windows but that was back in 2015.

The fringe bitmaps have fixed width specified in pixels.  I understand
you are saying that the number of pixels is correct, but its visual
appearance leaves a lot to be desired, is that right?  If so, you can
customize your fringes using this:

  (setq fringe-mode '(16 . 16))

(replace 16 with a number that is to your liking, I'm just guessing
there).

We could also apply the scaling automatically, patches welcome.

Message #11 received at 31203 <at> debbugs.gnu.org (full text, mbox):

From: Keith Russell <keithrussell42 <at> fastmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 31203 <at> debbugs.gnu.org
Subject: Re: bug#31203: 26.1; Fringe and toolbar bitmaps unscaled on Windows
 10 HiDPI display
Date: Wed, 18 Apr 2018 19:55:33 -0400

[Message part 1 (text/plain, inline)]

Hi Eli,

Unfortunately that only changes the width of the fringe. I had tried it 
before but tried again just to make sure. The bitmap doesn't scale with 
the fringe width. See the attached screen shot. This is with a fringe of 
32 and a font of "10" which translates to 33 pixels on my display. I'm 
not a Windows programmer (more Linux than anything) so I'm not sure if I 
can provide a patch. I will poke around the source and see what I can 
see. Maybe something obvious will pop out.

Thanks,

Keith


On 2018-04-18 2:54, Eli Zaretskii wrote:
>> From: Keith Russell <keithrussell42 <at> fastmail.com>
>> Date: Tue, 17 Apr 2018 21:07:34 -0400
>>
>>
>> Running on Windows 10 with a high resolution display (3840 x 2160)
>> the fringe bitmaps and toolbar buttons are so tiny as to be almost
>> indistinguishable from dots. Scrollbars and menus are fine and the
>> fonts look stunning. If I set the compatibility option to "override
>> application" and let the system scale then it's the right size but
>> fuzzy. I couldn't find anything in the bug reports. The only
>> thing I found in the Changelog was the change to make Emacs
>> DPI aware on Windows but that was back in 2015.
> The fringe bitmaps have fixed width specified in pixels.  I understand
> you are saying that the number of pixels is correct, but its visual
> appearance leaves a lot to be desired, is that right?  If so, you can
> customize your fringes using this:
>
>    (setq fringe-mode '(16 . 16))
>
> (replace 16 with a number that is to your liking, I'm just guessing
> there).
>
> We could also apply the scaling automatically, patches welcome.

[emacs-fringe.PNG (image/png, attachment)]

Message #14 received at 31203 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Keith Russell <keithrussell42 <at> fastmail.com>
Cc: 31203 <at> debbugs.gnu.org
Subject: Re: bug#31203: 26.1; Fringe and toolbar bitmaps unscaled on Windows
 10 HiDPI display
Date: Thu, 19 Apr 2018 09:34:09 +0300

> Cc: 31203 <at> debbugs.gnu.org
> From: Keith Russell <keithrussell42 <at> fastmail.com>
> Date: Wed, 18 Apr 2018 19:55:33 -0400
> 
> Unfortunately that only changes the width of the fringe. I had tried it 
> before but tried again just to make sure. The bitmap doesn't scale with 
> the fringe width. See the attached screen shot. This is with a fringe of 
> 32 and a font of "10" which translates to 33 pixels on my display. I'm 
> not a Windows programmer (more Linux than anything) so I'm not sure if I 
> can provide a patch. I will poke around the source and see what I can 
> see. Maybe something obvious will pop out.

Thanks.  I wonder why this problem was not reported on X.  Maybe the
relevant X APIs scale the bitmaps under the hood?

Message #17 received at 31203 <at> debbugs.gnu.org (full text, mbox):

From: Carlos Pita <carlosjosepita <at> gmail.com>
To: 31203 <at> debbugs.gnu.org
Date: Wed, 11 Sep 2019 12:55:28 -0300

Hi Eli, not sure about the fringe pixmaps, but I can confirm that many
things are scaled too tiny in X11 with a hidpi screen, for example
checkboxes and "subtree arrows" in customization buffers. Also tetris
looks absurdly tiny. In general, I would say that widgets and images
are not correctly scaled according to the screen dpi. It also
surprises me that there are so few google/debbugs matches when
searching for hidpi related problems. Everyone is moving to 2K and 3K
screens now, you can't buy new decent lowdpi hardware even if you
wanted to.

Message #20 received at 31203 <at> debbugs.gnu.org (full text, mbox):

From: Carlos Pita <carlosjosepita <at> gmail.com>
To: 31203 <at> debbugs.gnu.org
Cc: Eli Zaretskii <eliz <at> gnu.org>
Subject: Re:
Date: Wed, 11 Sep 2019 12:57:44 -0300

> looks absurdly tiny. In general, I would say that widgets and images
> are not correctly scaled according to the screen dpi. It also

I mean non-GTK widgets, the ones rendered by emacs itself.

Message #23 received at 31203 <at> debbugs.gnu.org (full text, mbox):

From: Carlos Pita <carlosjosepita <at> gmail.com>
To: 31203 <at> debbugs.gnu.org
Cc: Eli Zaretskii <eliz <at> gnu.org>
Subject: Re:
Date: Wed, 11 Sep 2019 13:24:09 -0300

Now I can confirm the tiny fringe indicators in X11 too:

* Emacs 26.1
* Ubuntu 19.04

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