Add vsync for OS X.

stepmania/src/RageDisplay_OGL.cpp

@@ -45,6 +45,10 @@ namespace GLExt {
 	extern PFNGLCOLORTABLEPARAMETERIVPROC glGetColorTableParameterivEXT;
 };
 
+#if defined(DARWIN)
+#include "archutils/Darwin/Vsync.h"
+#endif
+
 #include "RageDisplay.h"
 #include "RageDisplay_OGL.h"
 #include "RageUtil.h"
@@ -447,7 +451,11 @@ void SetupExtensions()
 	GetGLExtensions(g_glExts);
 
 	/* Find extension functions and reset broken flags */
+#if !defined(DARWIN)
 	GLExt::wglSwapIntervalEXT = (PWSWAPINTERVALEXTPROC) wind->GetProcAddress("wglSwapIntervalEXT");
+#else
+    GLExt::wglSwapIntervalEXT = wglSwapIntervalEXT;
+#endif
 	GLExt::glColorTableEXT = (PFNGLCOLORTABLEPROC) wind->GetProcAddress("glColorTableEXT");
 	GLExt::glGetColorTableParameterivEXT = (PFNGLCOLORTABLEPARAMETERIVPROC) wind->GetProcAddress("glGetColorTableParameterivEXT");
 	g_bEXT_texture_env_combine = HasExtension("GL_EXT_texture_env_combine");

stepmania/src/archutils/Darwin/Vsync.cpp

@@ -0,0 +1,19 @@
+/*
+ *  Vsync.cpp
+ *  stepmania
+ *
+ *  Created by Steve Checkoway on Mon Sep 22 2003.
+ *  Copyright (c) 2003 Steve Checkoway. All rights reserved.
+ *
+ */
+
+#include "Vsync.h"
+#include <OpenGl/OpenGl.h>
+
+
+bool wglSwapIntervalEXT(int swapInterval)
+{
+    /* I really have no idea what the expected return value for success. If it was an int
+    * I would return 0, since it is a bool, I'm going to guess that true is success. */
+    return !CGLSetParameter(CGLGetCurrentContext(), kCGLCPSwapInterval, &long(swapInterval));
+}

stepmania/src/archutils/Darwin/Vsync.h

@@ -0,0 +1,10 @@
+/*
+ *  Vsync.h
+ *  stepmania
+ *
+ *  Created by Steve Checkoway on Mon Sep 22 2003.
+ *  Copyright (c) 2003 Steve Checkoway. All rights reserved.
+ *
+ */
+
+bool wglSwapIntervalEXT(int swapInterval);