stdin.patch

diff --git c/src/quick/items/qquickwindowcontainer.cpp i/src/quick/items/qquickwindowcontainer.cpp
index 0c3a6cf8258..245145f2b30 100644
--- c/src/quick/items/qquickwindowcontainer.cpp
+++ i/src/quick/items/qquickwindowcontainer.cpp
@@ -443,6 +443,28 @@ void QQuickWindowContainer::updatePolish()
     }
 }
 
+QRectF QQuickWindowContainer::clipRect() const
+{
+    Q_D(const QQuickWindowContainer);
+    QRectF rect = boundingRect();
+
+    for (auto *viewport = viewportItem(); viewport; viewport = viewport->viewportItem()) {
+        if (viewport == this)
+            break;
+
+        if (viewport->flags().testFlag(QQuickItem::ItemClipsChildrenToShape)) {
+            // FIXME: This fails to take into account viewports that override clipRect()
+            const auto mappedViewportRect = mapRectFromItem(viewport, viewport->boundingRect());
+            rect = mappedViewportRect.intersected(ret);
+        }
+
+        if (viewport->viewportItem() == viewport)
+            break; // Content item returns itself as viewport
+    }
+
+    return rect;
+}
+
 // ----------------------- Window updates -----------------------
 
 /*
diff --git c/src/quick/items/qquickwindowcontainer_p.h i/src/quick/items/qquickwindowcontainer_p.h
index af182ec7eeb..ed41390c7bc 100644
--- c/src/quick/items/qquickwindowcontainer_p.h
+++ i/src/quick/items/qquickwindowcontainer_p.h
@@ -60,6 +60,8 @@ protected:
 
     bool eventFilter(QObject *object, QEvent *event) override;
 
+    QRectF clipRect() const override;
+
 private:
     Q_DECLARE_PRIVATE(QQuickWindowContainer)
     friend class QQuickWindowQmlImpl;