From 684c52941de75defab60b0725b89dc919848de0a Mon Sep 17 00:00:00 2001
From: Andreas Kling <awesomekling@gmail.com>
Date: Sat, 9 Mar 2019 17:03:08 +0100
Subject: [PATCH] WindowServer: Always clip window updates to the window's
 outer rect.

---
 WindowServer/WSWindowManager.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/WindowServer/WSWindowManager.cpp b/WindowServer/WSWindowManager.cpp
index 4590b80446..c951a0cad4 100644
--- a/WindowServer/WSWindowManager.cpp
+++ b/WindowServer/WSWindowManager.cpp
@@ -875,6 +875,8 @@ void WSWindowManager::compose()
             return;
         if (!any_dirty_rect_intersects_window(window))
             return;
+        PainterStateSaver saver(*m_back_painter);
+        m_back_painter->set_clip_rect(outer_window_rect(window));
         for (auto& dirty_rect : dirty_rects.rects()) {
             PainterStateSaver saver(*m_back_painter);
             m_back_painter->set_clip_rect(dirty_rect);