diff --git a/canvas/source/vcl/canvasbitmaphelper.hxx b/canvas/source/vcl/canvasbitmaphelper.hxx
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+/*************************************************************************
+ *
+ *  $RCSfile: canvasbitmaphelper.hxx,v $
+ *
+ *  $Revision: 1.2 $
+ *
+ *  last change: $Author: rt $ $Date: 2004-11-26 17:11:01 $
+ *
+ *  The Contents of this file are made available subject to the terms of
+ *  either of the following licenses
+ *
+ *         - GNU Lesser General Public License Version 2.1
+ *         - Sun Industry Standards Source License Version 1.1
+ *
+ *  Sun Microsystems Inc., October, 2000
+ *
+ *  GNU Lesser General Public License Version 2.1
+ *  =============================================
+ *  Copyright 2000 by Sun Microsystems, Inc.
+ *  901 San Antonio Road, Palo Alto, CA 94303, USA
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License version 2.1, as published by the Free Software Foundation.
+ *
+ *  This library 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 for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ *  MA  02111-1307  USA
+ *
+ *
+ *  Sun Industry Standards Source License Version 1.1
+ *  =================================================
+ *  The contents of this file are subject to the Sun Industry Standards
+ *  Source License Version 1.1 (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.openoffice.org/license.html.
+ *
+ *  Software provided under this License is provided on an "AS IS" basis,
+ *  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
+ *  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
+ *  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
+ *  See the License for the specific provisions governing your rights and
+ *  obligations concerning the Software.
+ *
+ *  The Initial Developer of the Original Code is: Sun Microsystems, Inc.
+ *
+ *  Copyright: 2000 by Sun Microsystems, Inc.
+ *
+ *  All Rights Reserved.
+ *
+ *  Contributor(s): _______________________________________
+ *
+ *
+ ************************************************************************/
+
+#ifndef _VCLCANVAS_CANVASBITMAPHELPER_HXX_
+#define _VCLCANVAS_CANVASBITMAPHELPER_HXX_
+
+#include <canvashelper.hxx>
+
+#ifndef _SV_BITMAPEX_HXX
+#include <vcl/bitmapex.hxx>
+#endif
+
+#include <canvas/vclwrapper.hxx>
+
+#include "bitmapbackbuffer.hxx"
+
+
+namespace vclcanvas
+{
+    /** Helper class for basic canvasbitmap functionality. Extends
+        CanvasHelper with some CanvasBitmap specialities, such as alpha
+        support.
+
+        Note that a plain CanvasHelper, although it does support the
+        XBitmap interface, has no provision for alpha channel on VCL
+        (at least no efficient one. If the alpha VDev one day gets
+        part of SAL, we might change that).
+     */
+    class CanvasBitmapHelper : public CanvasHelper
+    {
+    public:
+        CanvasBitmapHelper();
+
+        /** Set a new bitmap on this helper.
+
+            This method force-sets a new bitmap. The internally stored
+            bitmap representation is updated from the given bitmap,
+            including any size changes.
+         */
+        void setBitmap( const BitmapEx&                     rBitmap,
+                        const WindowGraphicDevice::ImplRef& rDevice );
+
+
+        // Overridden CanvasHelper functionality
+        // =====================================
+
+        void disposing();
+
+        ::drafts::com::sun::star::geometry::IntegerSize2D SAL_CALL getSize();
+
+        ::com::sun::star::uno::Reference< ::drafts::com::sun::star::rendering::XBitmapCanvas > SAL_CALL queryBitmapCanvas();
+
+        ::com::sun::star::uno::Reference< ::drafts::com::sun::star::rendering::XBitmap > SAL_CALL
+            getScaledBitmap( const ::drafts::com::sun::star::geometry::RealSize2D&  newSize,
+                             sal_Bool                                               beFast );
+
+        ::com::sun::star::uno::Sequence< sal_Int8 > SAL_CALL
+            getData( const ::drafts::com::sun::star::geometry::IntegerRectangle2D& rect );
+
+        void SAL_CALL setData( const ::com::sun::star::uno::Sequence< sal_Int8 >&               data,
+                               const ::drafts::com::sun::star::geometry::IntegerRectangle2D&    rect );
+
+        void SAL_CALL setPixel( const ::com::sun::star::uno::Sequence< sal_Int8 >&          color,
+                                const ::drafts::com::sun::star::geometry::IntegerPoint2D&   pos );
+
+        ::com::sun::star::uno::Sequence< sal_Int8 > SAL_CALL
+            getPixel( const ::drafts::com::sun::star::geometry::IntegerPoint2D& pos );
+
+        ::com::sun::star::uno::Reference< ::drafts::com::sun::star::rendering::XBitmapPalette > SAL_CALL getPalette();
+
+        ::drafts::com::sun::star::rendering::IntegerBitmapLayout SAL_CALL getMemoryLayout();
+
+        /// @internal
+        BitmapEx getBitmap() const;
+
+    private:
+        // default: disabled copy/assignment
+        CanvasBitmapHelper(const CanvasBitmapHelper&);
+        CanvasBitmapHelper& operator=( const CanvasBitmapHelper& );
+
+        BitmapBackBufferSharedPtr   mpBackBuffer;
+    };
+}
+
+#endif /* _VCLCANVAS_CANVASBITMAPHELPER_HXX_ */