From 7cd198623ee03b318b0b5a7e5e0b2c7550305a84 Mon Sep 17 00:00:00 2001
From: Ashod Nakashian <ashodnakashian@yahoo.com>
Date: Sat, 9 May 2015 12:23:09 -0400
Subject: [PATCH] Prevent the parent from drawing over OpenGL context.

---
 modules/highgui/src/window_w32.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/modules/highgui/src/window_w32.cpp b/modules/highgui/src/window_w32.cpp
index 29b1e41ed0..a644f31bae 100644
--- a/modules/highgui/src/window_w32.cpp
+++ b/modules/highgui/src/window_w32.cpp
@@ -739,6 +739,11 @@ CV_IMPL int cvNamedWindow( const char* name, int flags )
     if( !(flags & CV_WINDOW_AUTOSIZE))//YV add border in order to resize the window
        defStyle |= WS_SIZEBOX;
 
+#ifdef HAVE_OPENGL
+    if (flags & CV_WINDOW_OPENGL)
+        defStyle |= WS_CLIPCHILDREN | WS_CLIPSIBLINGS;
+#endif
+
     icvLoadWindowPos( name, rect );
 
     mainhWnd = CreateWindow( "Main HighGUI class", name, defStyle | WS_OVERLAPPED,