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diff --git a/include/basegfx/tools/b2dclipstate.hxx b/include/basegfx/tools/b2dclipstate.hxx
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+++ b/include/basegfx/tools/b2dclipstate.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 _BGFX_TOOLS_CLIPSTATE_HXX
+#define _BGFX_TOOLS_CLIPSTATE_HXX
+
+#include <sal/types.h>
+#include <o3tl/cow_wrapper.hxx>
+#include <basegfx/basegfxdllapi.h>
+
+//////////////////////////////////////////////////////////////////////////////
+
+namespace basegfx
+{
+    class B2DRange;
+    class B2DPolyRange;
+    class B2DPolygon;
+    class B2DPolyPolygon;
+
+    namespace tools
+    {
+        class ImplB2DClipState;
+
+        /** This class provides an optimized, symbolic clip state for graphical output
+
+            Having a current 'clip' state is a common attribute of
+            almost all graphic output APIs, most of which internally
+            represent it via a list of rectangular bands. In contrast,
+            this implementation purely uses symbolic clips, but in a
+            quite efficient manner, deferring actual evaluation until
+            a clip representation is requested, and using faster code
+            paths for common special cases (like all-rectangle clips)
+         */
+        class BASEGFX_DLLPUBLIC B2DClipState
+        {
+        public:
+            typedef o3tl::cow_wrapper< ImplB2DClipState > ImplType;
+
+        private:
+            ImplType mpImpl;
+
+        public:
+            /// Init clip, in 'cleared' state - everything is visible
+            B2DClipState();
+            ~B2DClipState();
+            B2DClipState( const B2DClipState& );
+            explicit B2DClipState( const B2DPolyPolygon& );
+            B2DClipState& operator=( const B2DClipState& );
+
+            /// Set clip to 'null' - nothing is visible
+            void makeNull();
+
+            /// returns true when clip is 'cleared' - everything is visible
+            bool isCleared() const;
+
+            bool operator==(const B2DClipState&) const;
+            bool operator!=(const B2DClipState&) const;
+
+            void unionRange(const B2DRange& );
+            void unionPolyPolygon(const B2DPolyPolygon& );
+
+            void intersectRange(const B2DRange& );
+            void intersectPolyPolygon(const B2DPolyPolygon& );
+
+            void subtractRange(const B2DRange& );
+            void subtractPolyPolygon(const B2DPolyPolygon& );
+
+            void xorRange(const B2DRange& );
+            void xorPolyPolygon(const B2DPolyPolygon& );
+
+            B2DPolyPolygon getClipPoly() const;
+        };
+    }
+}
+
+#endif // _BGFX_TOOLS_CLIPSTATE_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */