From fe52b009f3ea03ef62c447fddcd8597bec1fc9a2 Mon Sep 17 00:00:00 2001
From: Johan Klokkhammer Helsing <johan.helsing@qt.io>
Date: Wed, 8 Jun 2016 13:19:14 +0200
Subject: [PATCH] Set device pixel ratio for window decorations on scaled
 windows

Change-Id: I40d96362131124effd9405cdad4e3dea79e6ebe3
Reviewed-by: Pier Luigi Fiorini <pierluigi.fiorini@gmail.com>
---
 src/plugins/platforms/wayland/qwaylandabstractdecoration.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/plugins/platforms/wayland/qwaylandabstractdecoration.cpp b/src/plugins/platforms/wayland/qwaylandabstractdecoration.cpp
index 54a990b2d71..98e944365df 100644
--- a/src/plugins/platforms/wayland/qwaylandabstractdecoration.cpp
+++ b/src/plugins/platforms/wayland/qwaylandabstractdecoration.cpp
@@ -104,7 +104,10 @@ const QImage &QWaylandAbstractDecoration::contentImage()
     if (d->m_isDirty) {
         //Update the decoration backingstore
 
-        d->m_decorationContentImage = QImage(window()->frameGeometry().size(), QImage::Format_ARGB32_Premultiplied);
+        const int scale = waylandWindow()->scale();
+        const QSize imageSize = window()->frameGeometry().size() * scale;
+        d->m_decorationContentImage = QImage(imageSize, QImage::Format_ARGB32_Premultiplied);
+        d->m_decorationContentImage.setDevicePixelRatio(scale);
         d->m_decorationContentImage.fill(Qt::transparent);
         this->paint(&d->m_decorationContentImage);