[kde] [Bug 190627] Sub-pixel hinting enabled although it is disabled in systemsettings

[Christoph Feck]

https://bugs.kde.org/show_bug.cgi?id=190627

Christoph Feck <christoph at maxiom.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|CONFIRMED                   |RESOLVED
          Component|general                     |general
            Version|4.8.4                       |unspecified
         Resolution|---                         |UPSTREAM
           Assignee|plasma-bugs at kde.org         |unassigned-bugs at kde.org
            Product|plasma                      |kde

--- Comment #33 from Christoph Feck <christoph at maxiom.de> ---
Report it for each application where you see it. Qt cannot be fixed, because
rendering into a bitmap cannot add subpixel hinting, because Qt does not know
which screen (if at all) the bitmap is going to be copied into.

The respective application developers can then decide to change the code not to
render into a bitmap, but directly to the widget's painter. Or maybe they are
using Plasma text rendering calls, without being aware of the issue. Or they
use Plasma calls intentionally, to get the blurred shadows to be better
readable with transparent themes.

You might point them to this bug report, especially comment #21 and comment
#33.

Plasma developers could check, if rendering the shadows could be decoupled from
rendering the text, but that might cause issues when the metrics does not match
accurately.

Anyway, what you see is related, but a completely different issue what this bug
is about. Since bug 260943 has been marked upstream, I will do the same for
this one.

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