From 1975a98345d96b6155b651bba65eb8ae8ca30d92 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Morten=20Johan=20S=C3=B8rvig?= Date: Wed, 19 Jun 2019 12:54:46 +0200 Subject: [PATCH] macOS: prevent duplicate backing store scaling MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit m_requestedSize is already scaled by the QtGui scale factor (e.g. as set by QT_SCALE_FACTOR). Multiplying by QWindow::devicePixelRatio() then applies this factor again. Use QPlatformWindow::devicePixelRatio() instead, which returns the platform scale factor. Change-Id: I133e99d84f4718215fda9ef0cf81a113b51db2c7 Reviewed-by: Tor Arne Vestbø --- src/plugins/platforms/cocoa/qcocoabackingstore.mm | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/src/plugins/platforms/cocoa/qcocoabackingstore.mm b/src/plugins/platforms/cocoa/qcocoabackingstore.mm index 233ccfab9e..78aa98094c 100644 --- a/src/plugins/platforms/cocoa/qcocoabackingstore.mm +++ b/src/plugins/platforms/cocoa/qcocoabackingstore.mm @@ -413,10 +413,11 @@ void QCALayerBackingStore::ensureBackBuffer() bool QCALayerBackingStore::recreateBackBufferIfNeeded() { - const qreal devicePixelRatio = window()->devicePixelRatio(); + const QCocoaWindow *platformWindow = static_cast(window()->handle()); + const qreal devicePixelRatio = platformWindow->devicePixelRatio(); QSize requestedBufferSize = m_requestedSize * devicePixelRatio; - const NSView *backingStoreView = static_cast(window()->handle())->view(); + const NSView *backingStoreView = platformWindow->view(); Q_UNUSED(backingStoreView); auto bufferSizeMismatch = [&](const QSize requested, const QSize actual) {