View source for Qt Contributors Summit 2019 HighDpi

== High DPI Session at Qt Contributors Summit 2019 ==
=== Topics ===
* Icons always scaled with fractional factors in QPixmap QIcon::pixmap(QWindow *...) const qicon.cpp:899 
(Milian W to report bug), fix it to always downscale
* Separate factors: Use fractional only for fonts, adapt sizes to icons?
* Tor Arne: Concerns about complexity ; Wayland and macOS have scaling built in whereas Windows/Linux require Qt handling. Move scaling code to QPlatformWindow, etc?
* David Edmundson: QML Image's sourceSize property is buggy/misleading, clarify docs at least

=== References ===
* [https://code.qt.io/cgit/qt/qtbase.git/tree/src/gui/kernel/qhighdpiscaling.cpp Code with inline docs]
* [https://doc-snapshots.qt.io/qt5-5.14/highdpi.html High DPI Docs]
* [https://doc-snapshots.qt.io/qt5-5.14/qguiapplication.html#setHighDpiScaleFactorRoundingPolicy API Docs] , see also QT_SCALE_FACTOR_ROUNDING_POLICY