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diff --git a/slideshow/source/engine/transitions/barwipepolypolygon.hxx b/slideshow/source/engine/transitions/barwipepolypolygon.hxx
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+++ b/slideshow/source/engine/transitions/barwipepolypolygon.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 .
+ */
+
+#ifndef INCLUDED_SLIDESHOW_SOURCE_ENGINE_TRANSITIONS_BARWIPEPOLYPOLYGON_HXX
+#define INCLUDED_SLIDESHOW_SOURCE_ENGINE_TRANSITIONS_BARWIPEPOLYPOLYGON_HXX
+
+#include "parametricpolypolygon.hxx"
+#include "transitiontools.hxx"
+
+
+namespace slideshow {
+namespace internal {
+
+/// Generates a horizontal, left-to-right bar wipe:
+class BarWipePolyPolygon : public ParametricPolyPolygon
+{
+public:
+    explicit BarWipePolyPolygon( sal_Int32 nBars = 1 /* nBars > 1: blinds effect */ )
+        : m_nBars(nBars),
+          m_unitRect( createUnitRect() )
+        {}
+    virtual ::basegfx::B2DPolyPolygon operator () ( double t ) override;
+private:
+    const sal_Int32 m_nBars;
+    const ::basegfx::B2DPolygon m_unitRect;
+};
+
+}
+}
+
+#endif // INCLUDED_SLIDESHOW_SOURCE_ENGINE_TRANSITIONS_BARWIPEPOLYPOLYGON_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */