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diff --git a/cppcanvas/inc/cppcanvas/bitmapcanvas.hxx b/cppcanvas/inc/cppcanvas/bitmapcanvas.hxx
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+++ b/cppcanvas/inc/cppcanvas/bitmapcanvas.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 _CPPCANVAS_BITMAPCANVAS_HXX
+#define _CPPCANVAS_BITMAPCANVAS_HXX
+
+#include <sal/types.h>
+#include <osl/diagnose.h>
+
+#include <boost/shared_ptr.hpp>
+#include <basegfx/vector/b2isize.hxx>
+#include <cppcanvas/canvas.hxx>
+
+
+/* Definition of BitmapCanvas */
+
+namespace cppcanvas
+{
+    class BitmapCanvas;
+
+    // forward declaration, since cloneBitmapCanvas() also references BitmapCanvas
+    typedef ::boost::shared_ptr< BitmapCanvas > BitmapCanvasSharedPtr;
+
+    /** BitmapCanvas interface
+     */
+    class BitmapCanvas : public virtual Canvas
+    {
+    public:
+        virtual ::basegfx::B2ISize      getSize() const = 0;
+
+        // shared_ptr does not allow for covariant return types
+        BitmapCanvasSharedPtr           cloneBitmapCanvas() const
+        {
+            BitmapCanvasSharedPtr p( ::boost::dynamic_pointer_cast< BitmapCanvas >(this->clone()) );
+            OSL_ENSURE(p.get(), "BitmapCanvas::cloneBitmapCanvas(): dynamic cast failed");
+            return p;
+        }
+    };
+
+}
+
+#endif /* _CPPCANVAS_BITMAPCANVAS_HXX */