summaryrefslogtreecommitdiffstats
path: root/src/plugins/platforms/windows/qwindowsbackingstore.cpp
diff options
context:
space:
mode:
authorLaszlo Agocs <laszlo.agocs@theqtcompany.com>2016-02-04 10:15:59 +0100
committerJani Heikkinen <jani.heikkinen@theqtcompany.com>2016-02-05 04:14:17 +0000
commitd482805856a83f39fdab32c76f10cf7d7d5e2112 (patch)
treed054a2814ba565682ebba6ed8bb672fed18a8b01 /src/plugins/platforms/windows/qwindowsbackingstore.cpp
parentcb6d4d1f16215694547514a6342e47854534223e (diff)
Do not change depth for the backingstore's underlying image
The depth cannot change. This means that RGB16 cannot be upgraded to 8565 for example as that would be a 24 bit format whereas the backingstores and the underlying platform may expect a 16 bit format. Task-number: QTBUG-50869 Change-Id: I648b39287d43a80fae8097a33bbf3b8bbdcb8816 Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com> Reviewed-by: Andreas Holzammer <andreas.holzammer@kdab.com> Reviewed-by: Allan Sandfeld Jensen <allan.jensen@theqtcompany.com>
Diffstat (limited to 'src/plugins/platforms/windows/qwindowsbackingstore.cpp')
-rw-r--r--src/plugins/platforms/windows/qwindowsbackingstore.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/plugins/platforms/windows/qwindowsbackingstore.cpp b/src/plugins/platforms/windows/qwindowsbackingstore.cpp
index a6b1d0af26..af9d2a5969 100644
--- a/src/plugins/platforms/windows/qwindowsbackingstore.cpp
+++ b/src/plugins/platforms/windows/qwindowsbackingstore.cpp
@@ -155,7 +155,7 @@ void QWindowsBackingStore::resize(const QSize &size, const QRegion &region)
if (QImage::toPixelFormat(format).alphaUsage() == QPixelFormat::UsesAlpha)
m_alphaNeedsFill = true;
else // upgrade but here we know app painting does not rely on alpha hence no need to fill
- format = qt_alphaVersionForPainting(format);
+ format = qt_maybeAlphaVersionWithSameDepth(format);
QWindowsNativeImage *oldwni = m_image.data();
QWindowsNativeImage *newwni = new QWindowsNativeImage(size.width(), size.height(), format);