From Stephan Huber, "attached you'll find a small enhancement for GraphicsWindowCocoa to

implement the recently introduced setSyncToVBlank-method.

Additionally I added a ToggleSyncToVBlank-eventhandler to osgViewer. I
used it to test the code, perhaps you'll find it useful and include it
in the distribution."

include/osgViewer/ViewerEventHandlers

@@ -379,6 +379,29 @@ class OSGVIEWER_EXPORT LODScaleHandler : public osgGA::GUIEventHandler
         int _keyEventDecreaseLODScale;
 
 
+};
+
+/** Event handler for toggling SyncToVBlank.*/
+class OSGVIEWER_EXPORT ToggleSyncToVBlankHandler : public osgGA::GUIEventHandler
+{
+    public:
+
+        ToggleSyncToVBlankHandler();
+
+        void setKeyEventToggleSyncToVBlankHandler(int key) { _keyEventToggleSyncToVBlank = key; }
+        int getKeyEventToggleSyncToVBlankHandler() const { return _keyEventToggleSyncToVBlank; }
+
+        bool handle(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& aa);
+
+        /** Get the keyboard and mouse usage of this manipulator.*/
+        virtual void getUsage(osg::ApplicationUsage& usage) const;
+
+    protected:
+
+
+        int _keyEventToggleSyncToVBlank;
+
+
 };
 
 

include/osgViewer/api/Cocoa/GraphicsWindowCocoa

@@ -163,7 +163,7 @@ class GraphicsWindowCocoa : public osgViewer::GraphicsWindow, public osgViewer::
         GraphicsWindowCocoaWindow* getWindow() { return _window; }
         NSOpenGLPixelFormat* getPixelFormat() { return _pixelformat; }
                 
-        void setVSync(bool f);
+        virtual void setSyncToVBlank(bool f);
         
         /** adapts a resize / move of the window, coords in global screen space */
         void adaptResize(int x, int y, int w, int h);