High DPI/Windows style: Fix potential crash when drawing buttons of m…

…aximized QMdiSubWindow In QWindowsXPStylePrivate::drawBackgroundThruNativeBuffer(), pass the correct rectangle (reflecting the correction factor) to the function fixAlphaChannel(). Amends e56b8e1. Pick-to: 5.15 Fixes: QTBUG-84613 Task-number: QTBUG-75927 Change-Id: I5357bb8c55ed26a50cc322ea7a05df4487212fb8 Reviewed-by: Oliver Wolff <[email protected]>
dxli · Jun 2, 2020 · 13d95e4 · 13d95e4
1 parent 873aa68
commit 13d95e4
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/plugins/styles/windowsvista/qwindowsxpstyle.cpp b/src/plugins/styles/windowsvista/qwindowsxpstyle.cpp
@@ -972,7 +972,7 @@ bool QWindowsXPStylePrivate::drawBackgroundThruNativeBuffer(XPThemeData &themeDa
 
         // Fix alpha values, if needed
         if (potentialInvalidAlpha)
-            wasAlphaFixed = fixAlphaChannel(rect);
+            wasAlphaFixed = fixAlphaChannel(drawRect);
 
         QImage::Format format;
         if ((partIsTransparent && !wasAlphaSwapped) || (!partIsTransparent && hasAlpha)) {