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diff --git a/canvas/source/vcl/spritehelper.hxx b/canvas/source/vcl/spritehelper.hxx
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+++ b/canvas/source/vcl/spritehelper.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 .
+ */
+
+#pragma once
+
+#include <vcl/bitmapex.hxx>
+
+#include <base/canvascustomspritehelper.hxx>
+#include <base/spritesurface.hxx>
+#include <vclwrapper.hxx>
+
+#include "backbuffer.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();
+
+        // make CanvasCustomSpriteHelper::init visible for name lookup
+        using ::canvas::CanvasCustomSpriteHelper::init;
+
+        /** 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 css::geometry::RealSize2D&              rSpriteSize,
+                   const ::canvas::SpriteSurface::Reference&     rOwningSpriteCanvas,
+                   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 ::basegfx::B2DPolyPolygon polyPolygonFromXPolyPolygon2D(
+            css::uno::Reference< css::rendering::XPolyPolygon2D >& xPoly ) const override;
+
+        // for the redraw
+        BackBufferSharedPtr                                 mpBackBuffer;
+        BackBufferSharedPtr                                 mpBackBufferMask;
+
+        /// Cached bitmap for the current sprite content
+        mutable ::canvas::vcltools::VCLObject<BitmapEx>     maContent;
+
+        /// When true, line sprite corners in red
+        bool                                                mbShowSpriteBounds;
+
+    };
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */