From 3cc22c638c12e2a0b49a841948468e37733e4817 Mon Sep 17 00:00:00 2001
From: Max Horn
Date: Tue, 8 Nov 2005 22:23:09 +0000
Subject: Added asserts to OSystem_SDL::copyRectToScreen, which should detect
 any attempts to use invalid rects for blitting

svn-id: r19521
---
 backends/sdl/graphics.cpp | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'backends/sdl')

diff --git a/backends/sdl/graphics.cpp b/backends/sdl/graphics.cpp
index 7215f12a81..865c96fa37 100644
--- a/backends/sdl/graphics.cpp
+++ b/backends/sdl/graphics.cpp
@@ -802,6 +802,11 @@ void OSystem_SDL::copyRectToScreen(const byte *src, int pitch, int x, int y, int
 
 	Common::StackLock lock(_graphicsMutex);	// Lock the mutex until this function ends
 
+	assert(x >= 0 && x < _screenWidth);
+	assert(y >= 0 && y < _screenHeight);
+	assert(h > 0 && y + h <= _screenHeight);
+	assert(w > 0 && x + w <= _screenWidth);
+
 	if (((long)src & 3) == 0 && pitch == _screenWidth && x == 0 && y == 0 &&
 			w == _screenWidth && h == _screenHeight && _modeFlags & DF_WANT_RECT_OPTIM) {
 		/* Special, optimized case for full screen updates.
-- 
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