Turn off font hinting when we do high DPI scaling

Font hinting depends on the specific pixel size, and ends up very
wrong when the painter is scaled.

Change-Id: I2007ec7e7ad8d52358d76e88e030ea4df7e91455
Task-number: QTBUG-43809
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@theqtcompany.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/plugins/platforms/xcb/qxcbscreen.h b/src/plugins/platforms/xcb/qxcbscreen.h
index 4675b12d9c..e9ab2edaa0 100644
--- a/src/plugins/platforms/xcb/qxcbscreen.h
+++ b/src/plugins/platforms/xcb/qxcbscreen.h
@@ -98,6 +98,7 @@ public:
     void readXResources();
 
     QFontEngine::HintStyle hintStyle() const { return m_hintStyle; }
+    bool noFontHinting() const { return m_noFontHinting; }
     QFontEngine::SubpixelAntialiasingType subpixelType() const { return m_subpixelType; }
     int antialiasingEnabled() const { return m_antialiasingEnabled; }
 
@@ -132,6 +133,7 @@ private:
     int m_forcedDpi;
     int m_devicePixelRatio;
     QFontEngine::HintStyle m_hintStyle;
+    bool m_noFontHinting;
     QFontEngine::SubpixelAntialiasingType m_subpixelType;
     int m_antialiasingEnabled;
     QXcbXSettings *m_xSettings;