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diff --git a/src/imaging/FilterDistortion.h b/src/imaging/FilterDistortion.h
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+++ b/src/imaging/FilterDistortion.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
+//
+//  Original author of this file is igor@c-base.org 
+//
+
+#ifndef _FilterDistortion_H_
+#define _FilterDistortion_H_
+
+#include "../api.h"
+#include "CoordTransformer.h"
+
+#include "../graphics/Filter.h"
+
+#include "../base/GLMHelper.h"
+#include "../base/Rect.h"
+
+#include <boost/shared_ptr.hpp>
+
+namespace avg {
+
+// TODO: This class doesn't have a unit test.
+class AVG_API FilterDistortion: public Filter 
+{
+    public:
+        FilterDistortion(const IntPoint& srcSize, CoordTransformerPtr pTransformer);
+        virtual ~FilterDistortion();
+        BitmapPtr apply(BitmapPtr pBmpSource);
+    private:
+        IntPoint m_SrcSize;
+        CoordTransformerPtr m_pTransformer;
+        IntPoint* m_pMap;
+};
+
+typedef boost::shared_ptr<FilterDistortion> FilterDistortionPtr;
+
+}
+
+#endif