From 3c8f8f55d7fa4ca899ebd26afcb5626fc8fb8b53 Mon Sep 17 00:00:00 2001
From: "erwin.coumans" <erwin.coumans@08e121b0-ae19-0410-a57b-3be3395fd4fd>
Date: Sat, 6 Mar 2010 19:37:38 +0000
Subject: [PATCH] add vsync for Mac OSX to avoid tearing artifacts

---
 Demos/OpenGL/GlutStuff.cpp | 10 ++++++++++
 Demos/OpenGL/GlutStuff.h   |  1 +
 2 files changed, 11 insertions(+)

diff --git a/Demos/OpenGL/GlutStuff.cpp b/Demos/OpenGL/GlutStuff.cpp
index 867e1e150..d8de3e726 100644
--- a/Demos/OpenGL/GlutStuff.cpp
+++ b/Demos/OpenGL/GlutStuff.cpp
@@ -101,6 +101,16 @@ int glutmain(int argc, char **argv,int width,int height,const char* title,DemoAp
 	glutDisplayFunc( glutDisplayCallback );
 
 	glutMoveAndDisplayCallback();
+
+//enable vsync to avoid tearing on Apple (todo: for Windows)
+
+#if defined(__APPLE__) && !defined (VMDMESA)
+int swap_interval = 1;
+CGLContextObj cgl_context = CGLGetCurrentContext();
+CGLSetParameter(cgl_context, kCGLCPSwapInterval, &swap_interval);
+#endif
+
+
 	
     glutMainLoop();
     return 0;
diff --git a/Demos/OpenGL/GlutStuff.h b/Demos/OpenGL/GlutStuff.h
index c518bf208..10d357641 100644
--- a/Demos/OpenGL/GlutStuff.h
+++ b/Demos/OpenGL/GlutStuff.h
@@ -21,6 +21,7 @@ subject to the following restrictions:
 
 //think different
 #if defined(__APPLE__) && !defined (VMDMESA)
+#include <OpenGL/OpenGL.h>
 #include <OpenGL/gl.h>
 #include <OpenGL/glu.h>
 #include <GLUT/glut.h>