[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[Unknown]

https://bugs.kde.org/show_bug.cgi?id=366451

.  changed:

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=366451

--- Comment #22 from Nate Graham  ---
Git commit fde8d23beeae5d83af3b4384c96e1da8e27a701e by Nathaniel Graham, on
behalf of Bo Simonsen.
Committed on 21/09/2018 at 15:12.
Pushed by ngraham into branch 'Plasma/5.14'.

Use QtQuick.Controls 2.0 Label in energy and fileindexmonitor KCM

Summary:
The QtQuick.Controls 1.0 does not handle Label well on screens that uses a
fractional scaling. The fonts become
blurry, this has been fixed in  QtQuick.Controls 2.0 and
org.kde.plasma.components, however we prefer to use QtQuick.Controls 2.0 since
the modules will anyway transition to 2.x at some time.

Test Plan: * Use scaling 1,5 and fonts will appear correctly in kcm_energyinfo
and kcm_fileindexmonitor

Reviewers: davidedmundson

Reviewed By: davidedmundson

Subscribers: zzag, davidedmundson, ngraham, broulik, plasma-devel

Tags: #plasma

Differential Revision: https://phabricator.kde.org/D14011

M  +5-4Modules/energy/package/contents/ui/main.qml
M  +5-4Modules/fileindexermonitor/package/contents/ui/main.qml

https://commits.kde.org/kinfocenter/fde8d23beeae5d83af3b4384c96e1da8e27a701e

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[Vlad Zagorodniy]

https://bugs.kde.org/show_bug.cgi?id=366451

Vlad Zagorodniy  changed:

   What|Removed |Added

 Resolution|UPSTREAM|FIXED
  Latest Commit||https://commits.kde.org/kwi
   ||n/22d898399b38cadfd72474a2b
   ||50f1d41db7bd28e

--- Comment #21 from Vlad Zagorodniy  ---
Git commit 22d898399b38cadfd72474a2b50f1d41db7bd28e by Vlad Zagorodniy, on
behalf of Bo Simonsen.
Committed on 15/08/2018 at 08:31.
Pushed by vladz into branch 'Plasma/5.12'.

[kcmkwin] Use QtQuick.Controls 2.0 for Label and TextField

Summary:
Using QtQuick.Controls for Label and TextField can result in blurry font
rendering for a fractional scaling (e.g. 1,5). There is a work around for
QtQuick.Controls 2.x therefore using QtQuick.Controls 2.0 for Label and
TextField resolves the problem

Reviewers: #kwin, davidedmundson

Reviewed By: #kwin, davidedmundson

Subscribers: ngraham, zzag, davidedmundson, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D14495

M  +6-5kcmkwin/kwincompositing/qml/Effect.qml
M  +5-4kcmkwin/kwincompositing/qml/EffectView.qml
M  +5-4kcmkwin/kwindecoration/qml/Buttons.qml

https://commits.kde.org/kwin/22d898399b38cadfd72474a2b50f1d41db7bd28e

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=366451

Nate Graham  changed:

   What|Removed |Added

 CC||n...@kde.org

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[David Edmundson]

https://bugs.kde.org/show_bug.cgi?id=366451

--- Comment #20 from David Edmundson  ---
That's a workaround.

It is fixed in Qt 5.11 with native rendering 

Worth porting code from Qqc1 to qqc2 as we're doing it anyway. But that only
fixes the issue by chance

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[Bo Simonsen]

https://bugs.kde.org/show_bug.cgi?id=366451

--- Comment #19 from Bo Simonsen  ---
This is only partly resolved.

The labels are blurry because 

In QtQuick/Controls/Label.qml (qtquick controls 1):

renderType: Settings.isMobile ? Text.QtRendering : Text.NativeRendering

Needs to be:

renderType: Settings.isMobile || Screen.devicePixelRatio % 1 !== 0 ?
Text.QtRendering : Text.NativeRendering

Following:

https://cgit.kde.org/plasma-framework.git/commit/?id=a21bc11fe11651f6d211489ebfc8435cef877194

This probably means all KDE components should use PlasmaComponents.Label
(import org.kde.plasma.components 2.0 as PlasmaComponents)

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[David Edmundson]

https://bugs.kde.org/show_bug.cgi?id=366451

David Edmundson  changed:

   What|Removed |Added

 Resolution|--- |UPSTREAM
 Status|UNCONFIRMED |RESOLVED

--- Comment #18 from David Edmundson  ---
Fractional scaling on QtQuick views has been improved for Qt 5.10.

Please report if you have any issues after that.

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[James Lee]

https://bugs.kde.org/show_bug.cgi?id=366451

James Lee  changed:

   What|Removed |Added

 CC||ja...@james.tl

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[Adonai]

https://bugs.kde.org/show_bug.cgi?id=366451

Adonai  changed:

   What|Removed |Added

 CC||ado...@xaker.ru

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[rindeal]

https://bugs.kde.org/show_bug.cgi?id=366451

--- Comment #17 from Jan Chren (rindeal)  
---
Created attachment 105535
  --> https://bugs.kde.org/attachment.cgi?id=105535=edit
logout overlay; scaling=1.5

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[rindeal]

https://bugs.kde.org/show_bug.cgi?id=366451

Jan Chren (rindeal)  changed:

   What|Removed |Added

 CC||dev.rindeal+bugs.kde.org@gm
   ||ail.com

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=366451

--- Comment #16 from e.ekme...@gmail.com ---
I've found that setting XServer DPI manually fixes these fractional scaling
problems.
On my 2560x1440 display I use a DPI of 144 (i.e. a scaling factor of 1.5x),
which caused problems in regular Qt programs, the lockscreen,
shutdown/logout/suspend dialog, Okular etc.

To fix this, added "-dpi 144" to ServerArguments in my sddm.conf and set
display scaling back to 1.0x.
This makes KDE and all Qt programs scale flawlessly but GTK programs (i.e.
Firefox) remain unscaled which is an acceptable tradeoff for me.

I apologize if I'm spamming the mailing lists as I've been reposting this on
all of the bugs I've been tracking related to this issue.

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=366451

e.ekme...@gmail.com changed:

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 CC||e.ekme...@gmail.com

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[Simon Andric]

https://bugs.kde.org/show_bug.cgi?id=366451

Simon Andric  changed:

   What|Removed |Added

 CC||simonandr...@gmail.com

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[N . W .]

https://bugs.kde.org/show_bug.cgi?id=366451

--- Comment #15 from N. W.  ---
Yes, I've tried 1.5, same issue.

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[Roman Gilg]

https://bugs.kde.org/show_bug.cgi?id=366451

--- Comment #14 from Roman Gilg  ---
For me only scaling factors 1.5 and 2 work without problems. Did you try one of
these?

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[N . W .]

https://bugs.kde.org/show_bug.cgi?id=366451

N. W.  changed:

   What|Removed |Added

 CC||nw9165-3...@yahoo.com

--- Comment #13 from N. W.  ---
Any update on this one?

Things like the shutdown overlay for example still look messed up with display
scaling in KDE Neon 5.9.0.

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[David Edmundson]

https://bugs.kde.org/show_bug.cgi?id=366451

--- Comment #12 from David Edmundson  ---
Git commit 4b2abc581c6b3e7a4c2f1f893d47fad5d3806aca by David Edmundson.
Committed on 22/11/2016 at 10:32.
Pushed by davidedmundson into branch 'Plasma/5.8'.

Disable Qt's high DPI scaling on shutdown/switch user dialogs

Summary:
They use Plasma's scaling, so in theory it should have absolutely no
effect.

In practice it has an effect of hitting a Qt bug with font rendering.

Test Plan: None done

Reviewers: #plasma, mart

Reviewed By: mart

Subscribers: plasma-devel

Tags: #plasma

Differential Revision: https://phabricator.kde.org/D3158

M  +1-0ksmserver/main.cpp

http://commits.kde.org/plasma-workspace/4b2abc581c6b3e7a4c2f1f893d47fad5d3806aca

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[Fabian Vogt]

https://bugs.kde.org/show_bug.cgi?id=366451

Fabian Vogt  changed:

   What|Removed |Added

 CC||fab...@ritter-vogt.de

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[Bo Simonsen]

https://bugs.kde.org/show_bug.cgi?id=366451

--- Comment #11 from Bo Simonsen  ---
The infocenter seems also to be affected by this bug:
https://bugzilla.opensuse.org/show_bug.cgi?id=1006651

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[Bo Simonsen]

https://bugs.kde.org/show_bug.cgi?id=366451

Bo Simonsen  changed:

   What|Removed |Added

 CC||b...@geekworld.dk

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[David Edmundson]

https://bugs.kde.org/show_bug.cgi?id=366451

--- Comment #10 from David Edmundson  ---
Git commit 9f6b69237c299cabff1427da54768624545e1943 by David Edmundson.
Committed on 25/10/2016 at 20:58.
Pushed by davidedmundson into branch 'master'.

Support non integer scale factors in KFileDelegate

REVIEW: 129252

M  +7-1src/widgets/kfileitemdelegate.cpp

http://commits.kde.org/kio/9f6b69237c299cabff1427da54768624545e1943

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[David Edmundson]

https://bugs.kde.org/show_bug.cgi?id=366451

--- Comment #9 from David Edmundson  ---
Git commit c203e366c400bab750e0b0f3d640f7fa85c35065 by David Edmundson.
Committed on 25/10/2016 at 20:55.
Pushed by davidedmundson into branch 'master'.

Support non integer scale factors in kiconengine

REVIEW: 129253

M  +5-1src/kiconengine.cpp

http://commits.kde.org/kiconthemes/c203e366c400bab750e0b0f3d640f7fa85c35065

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[Roman via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=366451

--- Comment #8 from Roman  ---
Yes, you're right. But it's more: Certain elements (I assume everything
directly connected to the plasmashell or the theme) will not scale at all.

Try it out by setting the scale factor first to '2' -> Everything works fine.

Then set it to '1.9' -> artifacts + taskbar, window decorations and launcher
and icons in applications not scaled.

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[David Edmundson via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=366451

--- Comment #7 from David Edmundson  ---
Non integer numbers such as 2 or 3, will produce artifacts.

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[Lukas Schneiderbauer via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=366451

--- Comment #6 from Lukas Schneiderbauer  ---
Yes, still relevant.
The fonts in the shutdown overlay and in discover look crappy as well (like in
my screenshots).

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[Roman via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=366451

Roman  changed:

   What|Removed |Added

 CC||subd...@gmail.com

--- Comment #5 from Roman  ---
Still relevant in 5.8.x? How does your shutdown overlay look? How Discover?

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[Lukas Schneiderbauer via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=366451

Lukas Schneiderbauer  changed:

   What|Removed |Added

 Attachment #100466|0   |1
is obsolete||

--- Comment #4 from Lukas Schneiderbauer  ---
Created attachment 100468
  --> https://bugs.kde.org/attachment.cgi?id=100468=edit
screenshot of "systemsettings"

sorry, picked wrong screenshot

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[Lukas Schneiderbauer via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=366451

Lukas Schneiderbauer  changed:

   What|Removed |Added

 Attachment #100465|0   |1
is obsolete||

--- Comment #3 from Lukas Schneiderbauer  ---
Created attachment 100467
  --> https://bugs.kde.org/attachment.cgi?id=100467=edit
"desktop effects" dialog screenshot

sorry, picked wrong screenshot

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[Lukas Schneiderbauer via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=366451

--- Comment #2 from Lukas Schneiderbauer  ---
Created attachment 100466
  --> https://bugs.kde.org/attachment.cgi?id=100466=edit
screenshot of "systemsettings"

This screenshot is actually not really representive.
Only the hovered icon has an ugly underlying font in reality. The rest is an
artifact of the bad screenshot quality.

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[plasmashell] [Bug 366451] "display scaling" on hidpi screen results in poor font quality

[Lukas Schneiderbauer via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=366451

--- Comment #1 from Lukas Schneiderbauer  ---
Created attachment 100465
  --> https://bugs.kde.org/attachment.cgi?id=100465=edit
"desktop effects" dialog screenshot

Note that on this picture the left bar also has ugly fonts, but this seems to
be an artifact of the screenshot.

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