From 1e0862acdc2e6ccf77bf3a1436b877d3af5e5fe7 Mon Sep 17 00:00:00 2001
From: Jan Grulich <jgrulich@redhat.com>
Date: Wed, 10 Feb 2021 17:11:27 +0100
Subject: [PATCH] Translate opaque area with frame margins

The opaque area doesn't take window decorations into account, which may
result into possible graphical artefacts.

Pick-to: 5.15
Change-Id: I1606e8256e7e204dad927931eb1221b576e227fd
---

diff --git a/src/client/qwaylandwindow.cpp b/src/client/qwaylandwindow.cpp
index 04c2dbd..b29edfa 100644
--- a/src/client/qwaylandwindow.cpp
+++ b/src/client/qwaylandwindow.cpp
@@ -1242,12 +1242,14 @@
 
 void QWaylandWindow::setOpaqueArea(const QRegion &opaqueArea)
 {
-    if (opaqueArea == mOpaqueArea || !mSurface)
+    const QRegion translatedOpaqueArea = opaqueArea.translated(frameMargins().left(), frameMargins().top());
+
+    if (translatedOpaqueArea == mOpaqueArea || !mSurface)
         return;
 
-    mOpaqueArea = opaqueArea;
+    mOpaqueArea = translatedOpaqueArea;
 
-    struct ::wl_region *region = mDisplay->createRegion(opaqueArea);
+    struct ::wl_region *region = mDisplay->createRegion(translatedOpaqueArea);
     mSurface->set_opaque_region(region);
     wl_region_destroy(region);
 }