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| author | Morten Johan Sørvig <morten.sorvig@qt.io> | 2021-02-24 00:06:26 +0100 |
|---|---|---|
| committer | Qt Cherry-pick Bot <cherrypick_bot@qt-project.org> | 2021-03-08 10:47:53 +0000 |
| commit | 667d0eb3c5e57f9a6d8838910ece8c46b398781f (patch) | |
| tree | 4776364d03eb70f4f8526e6572869b999336b866 /src/gui | |
| parent | 93f46f303e4afd21e013c67d13cbdc0497a8b076 (diff) | |
High-DPI: Set the minimum scale factor to 1
Avoid painting errors with dpr < 1, also for the PassThrough
mode.
This limits the minimum high-dpi scale factor to 1,
for the code path which determines the scale factor
based on screen DPI.
Task-number: QTBUG-89948
Change-Id: I14b3f130f0ae141d5f05c87437f926a9f76d1dec
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
(cherry picked from commit ee409e6f0cab4aa051f75f7c7116d4b607d137fc)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
Diffstat (limited to 'src/gui')
| -rw-r--r-- | src/gui/kernel/qhighdpiscaling.cpp | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/src/gui/kernel/qhighdpiscaling.cpp b/src/gui/kernel/qhighdpiscaling.cpp index a2ca58e4c2..5bc3f11b3d 100644 --- a/src/gui/kernel/qhighdpiscaling.cpp +++ b/src/gui/kernel/qhighdpiscaling.cpp @@ -436,11 +436,9 @@ qreal QHighDpiScaling::roundScaleFactor(qreal rawFactor) break; } - // Don't round down to to zero; clamp the minimum (rounded) factor to 1. - // This is not a common case but can happen if a display reports a very - // low DPI. - if (scaleFactorRoundingPolicy != Qt::HighDpiScaleFactorRoundingPolicy::PassThrough) - roundedFactor = qMax(roundedFactor, qreal(1)); + // Clamp the minimum factor to 1. Qt does not currently render + // correctly with factors less than 1. + roundedFactor = qMax(roundedFactor, qreal(1)); return roundedFactor; } |