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diff --git a/include/basegfx/tuple/b2dtuple.hxx b/include/basegfx/tuple/b2dtuple.hxx
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+++ b/include/basegfx/tuple/b2dtuple.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/types.h>
+#include <basegfx/basegfxdllapi.h>
+#include <basegfx/tuple/Tuple2D.hxx>
+
+namespace basegfx
+{
+    class B2ITuple;
+
+    /** Base class for all Points/Vectors with two double values
+
+        This class provides all methods common to Point
+        and Vector classes which are derived from here.
+
+        @derive Use this class to implement Points or Vectors
+        which are based on two double values
+    */
+    class SAL_WARN_UNUSED B2DTuple : public Tuple2D<double>
+    {
+    public:
+
+        /** Create a 2D Tuple
+
+            The tuple is initialized to (0.0, 0.0)
+        */
+        B2DTuple()
+         : Tuple2D(0.0, 0.0)
+        {}
+
+        /** Create a 2D Tuple
+
+            @param fX
+            This parameter is used to initialize the X-coordinate
+            of the 2D Tuple.
+
+            @param fY
+            This parameter is used to initialize the Y-coordinate
+            of the 2D Tuple.
+        */
+        B2DTuple(double fX, double fY)
+            : Tuple2D(fX, fY)
+        {}
+
+        /** Create a copy of a 2D integer Tuple
+
+            @param rTup
+            The 2D Tuple which will be copied.
+        */
+        BASEGFX_DLLPUBLIC explicit B2DTuple(const B2ITuple& rTup);
+
+        // operators
+
+        B2DTuple operator-(void) const
+        {
+            return B2DTuple(-mfX, -mfY);
+        }
+
+        BASEGFX_DLLPUBLIC static const B2DTuple& getEmptyTuple();
+    };
+
+    // external operators
+
+
+    inline B2DTuple absolute(const B2DTuple& rTup)
+    {
+        B2DTuple aAbs(
+            fabs(rTup.getX()),
+            fabs(rTup.getY()));
+        return aAbs;
+    }
+
+    inline B2DTuple interpolate(const B2DTuple& rOld1, const B2DTuple& rOld2, double t)
+    {
+        if(rOld1 == rOld2)
+        {
+            return rOld1;
+        }
+        else if(0.0 >= t)
+        {
+            return rOld1;
+        }
+        else if(1.0 <= t)
+        {
+            return rOld2;
+        }
+        else
+        {
+            return B2DTuple(
+                ((rOld2.getX() - rOld1.getX()) * t) + rOld1.getX(),
+                ((rOld2.getY() - rOld1.getY()) * t) + rOld1.getY());
+        }
+    }
+
+    inline B2DTuple average(const B2DTuple& rOld1, const B2DTuple& rOld2)
+    {
+        return B2DTuple(
+            rtl_math_approxEqual(rOld1.getX(), rOld2.getX()) ? rOld1.getX() : (rOld1.getX() + rOld2.getX()) * 0.5,
+            rtl_math_approxEqual(rOld1.getY(), rOld2.getY()) ? rOld1.getY() : (rOld1.getY() + rOld2.getY()) * 0.5);
+    }
+
+    inline B2DTuple operator+(const B2DTuple& rTupA, const B2DTuple& rTupB)
+    {
+        B2DTuple aSum(rTupA);
+        aSum += rTupB;
+        return aSum;
+    }
+
+    inline B2DTuple operator-(const B2DTuple& rTupA, const B2DTuple& rTupB)
+    {
+        B2DTuple aSub(rTupA);
+        aSub -= rTupB;
+        return aSub;
+    }
+
+    inline B2DTuple operator/(const B2DTuple& rTupA, const B2DTuple& rTupB)
+    {
+        B2DTuple aDiv(rTupA);
+        aDiv /= rTupB;
+        return aDiv;
+    }
+
+    inline B2DTuple operator*(const B2DTuple& rTupA, const B2DTuple& rTupB)
+    {
+        B2DTuple aMul(rTupA);
+        aMul *= rTupB;
+        return aMul;
+    }
+
+    inline B2DTuple operator*(const B2DTuple& rTup, double t)
+    {
+        B2DTuple aNew(rTup);
+        aNew *= t;
+        return aNew;
+    }
+
+    inline B2DTuple operator*(double t, const B2DTuple& rTup)
+    {
+        B2DTuple aNew(rTup);
+        aNew *= t;
+        return aNew;
+    }
+
+    inline B2DTuple operator/(const B2DTuple& rTup, double t)
+    {
+        B2DTuple aNew(rTup);
+        aNew /= t;
+        return aNew;
+    }
+
+    /** Round double to nearest integer for 2D tuple
+
+        @return the nearest integer for this tuple
+    */
+    BASEGFX_DLLPUBLIC B2ITuple fround(const B2DTuple& rTup);
+} // end of namespace basegfx
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */