Fix default hinting with dpr scaling on Wayland

When high-dpi scaling is enabled, we default to HintNone
currently, since otherwise text layouts (and widget layouts
and anything depending on text size) will have to be updated
when the window is dragged onto a screen with a different dpr.

The check for whether scaling is enabled was based on
QHighDpiScaling::isActive(), which is technically incorrect
since this does not return whether there is a scale on the
painting, rather whether the coordinate system in Qt matches
the one of the platform.

Now that we support agreeing on fractional scale factors with
the Wayland compositor, this issue has become visible, since
QHighDpiScaling::isActive() will now return false for these
compositors, even for fractional scales. For integer scales,
the issue existed before as well, but the kerning issues are
less noticeable in that case.

Pick-to: 6.6 6.7
Fixes: QTBUG-122910
Change-Id: Ic82b07d57a06a351255619f9227dd60396903ade
Reviewed-by: David Edmundson <davidedmundson@kde.org>
Reviewed-by: Kai Uwe Broulik <kde@privat.broulik.de>

0 files changed, 0 insertions, 0 deletions