high-dpi: Re-implement mapToGlobal and mapFromGlobal

(This code is required to handle corner cases such as a QWindow
covering multiple screens, where the normal code path does not
give correct results.)

Move the map[to|from]Global implementation from qhighdpiscaling.cpp,
and implement it in terms of [to|from]NativeGlobalPosition. These
functions implement the required screenAt()-type searching.

The implementation strategy for both mapping functions is to first
map to the native coordinate system, perform the globalPos addition
or subtraction, and then map the result back to device independent
coordinates.

Task-number: QTBUG-81695
Change-Id: I44e9e68651634650964e839b1e564b50f434553f
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>

0 files changed, 0 insertions, 0 deletions