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diff --git a/offapi/com/sun/star/geometry/XMapping2D.idl b/offapi/com/sun/star/geometry/XMapping2D.idl
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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 .
+ */
+#ifndef __com_sun_star_geometry_XMapping2D_idl__
+#define __com_sun_star_geometry_XMapping2D_idl__
+
+#include <com/sun/star/uno/XInterface.idl>
+#include <com/sun/star/geometry/RealPoint2D.idl>
+
+module com {  module sun {  module star {  module geometry {
+
+/** Interface defining an arbitrary bijective mapping from R^2 to R^2.<p>
+
+    This interface provides methods to define an arbitrary bijective
+    mapping from R^2 to R^2, i.e. from the two-dimensional space of
+    real numbers onto itself, as is representable by the
+    double floating point type. The mapping must be
+    bijective, i.e. map a pair of real numbers to exactly one other
+    pair of real numbers and vice versa, to facilitate a working
+    inverse. Bijectiveness also implies completeness, i.e. for every
+    pair of real numbers there must be another pair that is mapped
+    upon them.<p>
+
+    @since OOo 2.0
+ */
+interface XMapping2D : ::com::sun::star::uno::XInterface
+{
+    /** Forward 2D mapping function
+     */
+    RealPoint2D     map( [in] RealPoint2D aPoint );
+
+
+    /** Inverse 2D mapping function.<p>
+
+        The following invariant must hold:
+        <code>map(mapInverse(p))=p</code>. This effectively rules out
+        non-bijective mappings.<p>
+     */
+    RealPoint2D     mapInverse( [in] RealPoint2D aPoint );
+};
+
+}; }; }; };
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */