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diff --git a/canvas/source/vcl/spritehelper.hxx b/canvas/source/vcl/spritehelper.hxx
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+/*************************************************************************
+ *
+ *  OpenOffice.org - a multi-platform office productivity suite
+ *
+ *  $RCSfile: spritehelper.hxx,v $
+ *
+ *  $Revision: 1.2 $
+ *
+ *  last change: $Author: kz $ $Date: 2005-11-02 13:05:12 $
+ *
+ *  The Contents of this file are made available subject to
+ *  the terms of GNU Lesser General Public License Version 2.1.
+ *
+ *
+ *    GNU Lesser General Public License Version 2.1
+ *    =============================================
+ *    Copyright 2005 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
+ *
+ ************************************************************************/
+
+#ifndef _VCLCANVAS_SPRITEHELPER_HXX
+#define _VCLCANVAS_SPRITEHELPER_HXX
+
+#include <com/sun/star/rendering/XCustomSprite.hpp>
+
+#include <vcl/virdev.hxx>
+
+#include <canvas/base/canvascustomspritehelper.hxx>
+#include <canvas/vclwrapper.hxx>
+
+#include "backbuffer.hxx"
+#include "impltools.hxx"
+#include "spritecanvas.hxx"
+
+
+namespace vclcanvas
+{
+    /* Definition of SpriteHelper class */
+
+    /** Helper class for canvas sprites.
+
+        This class implements all sprite-related functionality, like
+        that available on the XSprite interface.
+     */
+    class SpriteHelper : public ::canvas::CanvasCustomSpriteHelper
+    {
+    public:
+        SpriteHelper();
+
+        /** Late-init the sprite helper
+
+            @param rSpriteSize
+            Size of the sprite
+
+            @param rSpriteCanvas
+            Sprite canvas this sprite is part of. Object stores
+            ref-counted reference to it, thus, don't forget to pass on
+            disposing()!
+
+            @param rBackBuffer
+            Buffer of the sprite content (non-alpha part)
+
+            @param rBackBufferMask
+            Buffer of the sprite content (alpha part)
+         */
+        void init( const ::com::sun::star::geometry::RealSize2D&    rSpriteSize,
+                   const SpriteCanvasRef&                           rSpriteCanvas,
+                   const BackBufferSharedPtr&                       rBackBuffer,
+                   const BackBufferSharedPtr&                       rBackBufferMask,
+                   bool                                             bShowSpriteBounds );
+
+        void disposing();
+
+        /** Repaint sprite content to associated sprite canvas
+
+            @param rPos
+            Output position (sprite's own position is disregarded)
+
+            @param io_bSurfacesDirty
+            When true, the referenced sprite surfaces (backBuffer and
+            backBufferMask) have been modified since last call.
+
+            @param bBufferedUpdate
+            When true, the redraw does <em>not</em> happen directly on
+            the front buffer, but within a VDev. Used to speed up
+            drawing.
+         */
+        void redraw( OutputDevice&              rOutDev,
+                     const ::basegfx::B2DPoint& rPos,
+                     bool&                      bSurfacesDirty,
+                     bool                       bBufferedUpdate ) const;
+
+    private:
+        virtual void clearSurface();
+        virtual ::basegfx::B2DPolyPolygon polyPolygonFromXPolyPolygon2D(
+            ::com::sun::star::uno::Reference< ::com::sun::star::rendering::XPolyPolygon2D >& xPoly ) const;
+
+        // for the redraw
+        BackBufferSharedPtr                                 mpBackBuffer;
+        BackBufferSharedPtr                                 mpBackBufferMask;
+
+        // necessary to avoid downcasts later on (Sprite interface
+        // only gets passed ptr to SpriteSurface interface, not
+        // concrete implementations)
+        SpriteCanvasRef                                     mpSpriteCanvas;
+
+        /// Cached bitmap for the current sprite content
+        mutable ::canvas::vcltools::VCLObject<BitmapEx>     maContent;
+
+        /// When true, line sprite corners in red
+        bool                                                mbShowSpriteBounds;
+
+    };
+}
+
+#endif /* _VCLCANVAS_SPRITEHELPER_HXX */