From 3be27971b218908564072641bcb7bc1e7a6bea84 Mon Sep 17 00:00:00 2001
From: Derek Foreman <foremande@gmail.com>
Date: Fri, 25 Jun 2010 12:29:12 -0400
Subject: [PATCH] Vsync waits on systems that support GLX_EXT_swap_control

---
 openbox/composite.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/openbox/composite.c b/openbox/composite.c
index 6e52ead0..7efe0b3b 100644
--- a/openbox/composite.c
+++ b/openbox/composite.c
@@ -335,6 +335,14 @@ gboolean composite_enable(void)
     /* register our screen redraw callback */
     composite_idle_source = g_idle_add(composite, NULL);
 
+    //Attempt to enable vsync
+    if (GLXEW_EXT_swap_control) {
+        GLXDrawable drawable = glXGetCurrentDrawable();
+        glXSwapIntervalEXT(obt_display, drawable, 1);
+    } else {
+        ob_debug_type(OB_DEBUG_CM, "Vsync control not available.");
+    }
+
     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
     glXSwapBuffers(obt_display, composite_overlay);
     glMatrixMode(GL_PROJECTION);
-- 
2.34.1