From bc8b952d7169820213551dcdacccbebb66e1d84a Mon Sep 17 00:00:00 2001
From: Eugene Sandulenko
Date: Fri, 18 Aug 2017 10:17:29 +0200
Subject: GRAPHICS: MACGUI: Perform sanity checks before blitting

---
 graphics/macgui/macwindowmanager.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/graphics/macgui/macwindowmanager.cpp b/graphics/macgui/macwindowmanager.cpp
index 9a3e711c19..8eaf8e9f5b 100644
--- a/graphics/macgui/macwindowmanager.cpp
+++ b/graphics/macgui/macwindowmanager.cpp
@@ -289,8 +289,10 @@ void MacWindowManager::draw() {
 
 			Common::Rect clip(w->getDimensions().left - 2, w->getDimensions().top - 2, w->getDimensions().right - 2, w->getDimensions().bottom - 2);
 			clip.clip(_screen->getBounds());
+			clip.clip(Common::Rect(0, 0, g_system->getWidth() - 1, g_system->getHeight() - 1));
 
-			g_system->copyRectToScreen(_screen->getBasePtr(clip.left, clip.top), _screen->pitch, clip.left, clip.top, clip.width(), clip.height());
+			if (!clip.isEmpty())
+				g_system->copyRectToScreen(_screen->getBasePtr(clip.left, clip.top), _screen->pitch, clip.left, clip.top, clip.width(), clip.height());
 		}
 	}
 
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