From b3bed2c8deb8c4f09ac7b5023cfc24a69a95ad46 Mon Sep 17 00:00:00 2001
From: Friedemann Kleint <Friedemann.Kleint@digia.com>
Date: Thu, 18 Apr 2013 13:43:31 +0200
Subject: Fix format for alpha drawing.

Task-number: QTBUG-28531

Change-Id: Ie97953950cad26776724848adc5751c861903cf7
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>
---
 src/plugins/platforms/windows/qwindowsbackingstore.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/plugins/platforms/windows/qwindowsbackingstore.cpp')

diff --git a/src/plugins/platforms/windows/qwindowsbackingstore.cpp b/src/plugins/platforms/windows/qwindowsbackingstore.cpp
index b40aefa225..dfbbe3069c 100644
--- a/src/plugins/platforms/windows/qwindowsbackingstore.cpp
+++ b/src/plugins/platforms/windows/qwindowsbackingstore.cpp
@@ -146,7 +146,7 @@ void QWindowsBackingStore::resize(const QSize &size, const QRegion &region)
 #endif
         QImage::Format format = QWindowsNativeImage::systemFormat();
         if (format == QImage::Format_RGB32 && rasterWindow()->window()->format().hasAlpha())
-            format = QImage::Format_ARGB32;
+            format = QImage::Format_ARGB32_Premultiplied;
         m_image.reset(new QWindowsNativeImage(size.width(), size.height(), format));
     }
 }
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