From 8b62673d9f0cf8aea126b3cd2f52686f013d7fe1 Mon Sep 17 00:00:00 2001 From: Friedemann Kleint Date: Tue, 18 Apr 2017 15:02:08 +0200 Subject: QGraphicsDropShadowEffect: Fix for high DPI scaling Preserve the device pixel ratio. Task-number: QTBUG-60026 Change-Id: Ie818c582fe2c7b11ceb347b39cfbf7ea49361021 Reviewed-by: Shawn Rutledge --- src/widgets/effects/qpixmapfilter.cpp | 2 ++ 1 file changed, 2 insertions(+) diff --git a/src/widgets/effects/qpixmapfilter.cpp b/src/widgets/effects/qpixmapfilter.cpp index 2a069d7529..bb949fcebf 100644 --- a/src/widgets/effects/qpixmapfilter.cpp +++ b/src/widgets/effects/qpixmapfilter.cpp @@ -1316,6 +1316,7 @@ void QPixmapDropShadowFilter::draw(QPainter *p, return; QImage tmp(px.size(), QImage::Format_ARGB32_Premultiplied); + tmp.setDevicePixelRatio(px.devicePixelRatioF()); tmp.fill(0); QPainter tmpPainter(&tmp); tmpPainter.setCompositionMode(QPainter::CompositionMode_Source); @@ -1324,6 +1325,7 @@ void QPixmapDropShadowFilter::draw(QPainter *p, // blur the alpha channel QImage blurred(tmp.size(), QImage::Format_ARGB32_Premultiplied); + blurred.setDevicePixelRatio(px.devicePixelRatioF()); blurred.fill(0); QPainter blurPainter(&blurred); qt_blurImage(&blurPainter, tmp, d->radius, false, true); -- cgit v1.2.3