From 74968f0ec1cf6eed36aae711a56dd46172955194 Mon Sep 17 00:00:00 2001
From: Andreas Kling <awesomekling@gmail.com>
Date: Fri, 27 Dec 2019 11:40:29 +0100
Subject: [PATCH] WindowServer: Don't send paint events to occluded windows

We wouldn't be able to see what they paint anyway, and nobody should
be using paint events to drive program logic.
---
 Servers/WindowServer/WSClientConnection.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Servers/WindowServer/WSClientConnection.cpp b/Servers/WindowServer/WSClientConnection.cpp
index d91186513e..30f0b68711 100644
--- a/Servers/WindowServer/WSClientConnection.cpp
+++ b/Servers/WindowServer/WSClientConnection.cpp
@@ -436,7 +436,7 @@ OwnPtr<WindowServer::DestroyWindowResponse> WSClientConnection::handle(const Win
 void WSClientConnection::post_paint_message(WSWindow& window)
 {
     auto rect_set = window.take_pending_paint_rects();
-    if (window.is_minimized())
+    if (window.is_minimized() || window.is_occluded())
         return;
 
     Vector<Rect> rects;