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diff --git a/src/player/DisplayEngine.h b/src/player/DisplayEngine.h
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+
+//  libavg - Media Playback Engine. 
+//  Copyright (C) 2003-2014 Ulrich von Zadow
+//
+//  This library is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU Lesser General Public
+//  License as published by the Free Software Foundation; either
+//  version 2 of the License, or (at your option) any later version.
+//
+//  This library is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//  Lesser General Public License for more details.
+//
+//  You should have received a copy of the GNU Lesser General Public
+//  License along with this library; if not, write to the Free Software
+//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+//
+//  Current versions can be found at www.libavg.de
+//
+
+#ifndef _DisplayEngine_H_
+#define _DisplayEngine_H_
+
+#include "../api.h"
+#include "DisplayParams.h"
+
+#include "../graphics/Pixel32.h"
+#include "../graphics/Bitmap.h"
+
+#include "../base/Rect.h"
+
+#include <boost/shared_ptr.hpp>
+
+#include <string>
+
+namespace avg {
+
+class Region;
+
+class AVG_API DisplayEngine
+{   
+    public:
+        DisplayEngine();
+        virtual ~DisplayEngine();
+        virtual void teardown() = 0;
+        void initRender();
+        void deinitRender();
+        void setFramerate(float rate);
+        float getFramerate();
+        float getEffectiveFramerate();
+        void setVBlankRate(int rate);
+        bool wasFrameLate();
+        virtual void setGamma(float Red, float Green, float Blue) = 0;
+        virtual void setMousePos(const IntPoint& pos) = 0;
+        virtual int getKeyModifierState() const = 0;
+
+        void frameWait();
+        virtual void swapBuffers() = 0;
+        void checkJitter();
+        long long getDisplayTime();
+
+        virtual IntPoint getSize() = 0;
+
+        virtual void showCursor(bool bShow) = 0;
+
+        virtual BitmapPtr screenshot(int buffer=0) = 0;
+
+    protected:
+        
+    private:
+        int m_NumFrames;
+        int m_FramesTooLate;
+        long long m_StartTime;
+        long long m_TimeSpentWaiting;
+
+        // Per-Frame timings.
+        long long m_LastFrameTime;
+        long long m_FrameWaitStartTime;
+        long long m_TargetTime;
+        int m_VBRate;
+        float m_Framerate;
+        bool m_bInitialized;
+        bool m_bFrameLate;
+
+        float m_EffFramerate;
+};
+
+typedef boost::shared_ptr<DisplayEngine> DisplayEnginePtr;
+
+}
+
+#endif //_DisplayEngine_H_