From d218a8c9a781fe05b507eaeae0aa1a3ea13bd6a7 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Fri, 4 Feb 2011 10:27:05 +0000
Subject: [PATCH] Added support for getting the current screen refresh rate
 using the XrandR extension.

---
 src/osgViewer/GraphicsWindowX11.cpp | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/osgViewer/GraphicsWindowX11.cpp b/src/osgViewer/GraphicsWindowX11.cpp
index 7ce1c8c84..c3ff241c5 100644
--- a/src/osgViewer/GraphicsWindowX11.cpp
+++ b/src/osgViewer/GraphicsWindowX11.cpp
@@ -1910,7 +1910,22 @@ public:
             resolution.width = DisplayWidth(display, si.screenNum);
             resolution.height = DisplayHeight(display, si.screenNum);
             resolution.colorDepth = DefaultDepth(display, si.screenNum);
+
             resolution.refreshRate = 0;            // Missing call. Need a X11 expert.
+
+
+#ifdef OSGVIEWER_USE_XRANDR
+           if (supportsRandr(display))
+           {
+
+               XRRScreenConfiguration* screenConfig = XRRGetScreenInfo ( display, RootWindow(display, si.screenNum) );
+
+               resolution.refreshRate = XRRConfigCurrentRate ( screenConfig );
+
+               XRRFreeScreenConfigInfo( screenConfig );
+           }
+#endif
+
             
             XCloseDisplay(display);
         }