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authorEirik Aavitsland <eirik.aavitsland@qt.io>2022-06-28 09:32:09 +0200
committerEirik Aavitsland <eirik.aavitsland@qt.io>2022-07-12 13:24:56 +0200
commitc78ec505293ed576779c0ee7342746cde39281d6 (patch)
treed10db3317a6cfbbd63e7f4d8f2e315050cf10c3c /src/widgets/kernel/qwidget.cpp
parent9e453dacc3855bafd3d7b692d76699c3bf07b9c6 (diff)
Improve widget painting under dpr>1 by enabling smooth pixmap scaling
Smooth scaling of icons etc. give far better visual results, particularly with fractional dpr scaling. So enable this generally in QStylePainter, and make more of the relevant widgets use QStylePainter instead of QPainter directly. Differences can be seen in the widgets examples, e.g. textedit, gallery, stylesheet (Pagefold), mdi. Pick-to: 6.4 6.3 6.2 Task-number: QTBUG-96223 Fixes: QTBUG-101058 Change-Id: I3c34a455d097e5f6a6a09d3b020528b4fbda4d85 Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io> Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
Diffstat (limited to 'src/widgets/kernel/qwidget.cpp')
-rw-r--r--src/widgets/kernel/qwidget.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/widgets/kernel/qwidget.cpp b/src/widgets/kernel/qwidget.cpp
index f0da19f9c8..ab129b73e7 100644
--- a/src/widgets/kernel/qwidget.cpp
+++ b/src/widgets/kernel/qwidget.cpp
@@ -5529,6 +5529,7 @@ void QWidgetPrivate::drawWidget(QPaintDevice *pdev, const QRegion &rgn, const QP
&& !q->testAttribute(Qt::WA_OpaquePaintEvent) && !q->testAttribute(Qt::WA_NoSystemBackground)) {
beginBackingStorePainting();
QPainter p(q);
+ p.setRenderHint(QPainter::SmoothPixmapTransform);
paintBackground(&p, toBePainted, (asRoot || onScreen) ? (flags | DrawAsRoot) : DrawWidgetFlags());
endBackingStorePainting();
}