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diff --git a/slideshow/source/engine/transitions/transitiontools.hxx b/slideshow/source/engine/transitions/transitiontools.hxx
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+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org 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 version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#ifndef INCLUDED_SLIDESHOW_TRANSITIONTOOLS_HXX
+#define INCLUDED_SLIDESHOW_TRANSITIONTOOLS_HXX
+
+#include <basegfx/numeric/ftools.hxx>
+#include <basegfx/polygon/b2dpolygon.hxx>
+#include <basegfx/polygon/b2dpolypolygon.hxx>
+
+#include <algorithm>
+
+
+namespace slideshow {
+namespace internal {
+
+/// Create a unit rect.
+::basegfx::B2DPolygon createUnitRect();
+
+/// Flips on X-axis:
+::basegfx::B2DPolyPolygon flipOnXAxis(
+    ::basegfx::B2DPolyPolygon const & polypoly );
+
+/// Flips on Y-axis:
+::basegfx::B2DPolyPolygon flipOnYAxis(
+    ::basegfx::B2DPolyPolygon const & polypoly );
+
+}
+}
+
+#endif /* INCLUDED_SLIDESHOW_TRANSITIONTOOLS_HXX */