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diff --git a/canvas/source/tools/surfaceproxy.hxx b/canvas/source/tools/surfaceproxy.hxx
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+++ b/canvas/source/tools/surfaceproxy.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 <rendering/isurfaceproxy.hxx>
+#include <rendering/icolorbuffer.hxx>
+
+#include "pagemanager.hxx"
+#include "surface.hxx"
+
+namespace canvas
+{
+    /** Definition of the surface proxy class.
+
+        Surface proxies are the connection between *one* source image
+        and *one or more* hardware surfaces (or textures).  in a
+        logical structure surface proxies represent solely this
+        dependency plus some simple cache management.
+    */
+    class SurfaceProxy : public ISurfaceProxy
+    {
+    public:
+
+        SurfaceProxy( std::shared_ptr<canvas::IColorBuffer> xBuffer,
+                      PageManagerSharedPtr xPageManager );
+
+        // ISurfaceProxy interface
+        virtual void setColorBufferDirty() override;
+
+        /** Render the surface content to screen.
+
+            @param fAlpha
+            Overall alpha for content
+
+            @param rPos
+            Output position
+
+            @param rTransform
+            Output transformation (does not affect output position)
+        */
+        virtual bool draw( double                         fAlpha,
+                           const ::basegfx::B2DPoint&     rPos,
+                           const ::basegfx::B2DHomMatrix& rTransform ) override;
+
+        /** Render the surface content to screen.
+
+            @param fAlpha
+            Overall alpha for content
+
+            @param rPos
+            Output position
+
+            @param rArea
+            Subset of the surface to render. Coordinate system are
+            surface area pixel, given area will be clipped to the
+            surface bounds.
+
+            @param rTransform
+            Output transformation (does not affect output position)
+        */
+        virtual bool draw( double                         fAlpha,
+                           const ::basegfx::B2DPoint&     rPos,
+                           const ::basegfx::B2DRange&     rArea,
+                           const ::basegfx::B2DHomMatrix& rTransform ) override;
+
+        /** Render the surface content to screen.
+
+            @param fAlpha
+            Overall alpha for content
+
+            @param rPos
+            Output position
+
+            @param rClipPoly
+            Clip polygon for the surface. The clip polygon is also
+            subject to the output transformation.
+
+            @param rTransform
+            Output transformation (does not affect output position)
+        */
+        virtual bool draw( double                           fAlpha,
+                           const ::basegfx::B2DPoint&       rPos,
+                           const ::basegfx::B2DPolyPolygon& rClipPoly,
+                           const ::basegfx::B2DHomMatrix&   rTransform ) override;
+
+    private:
+        PageManagerSharedPtr          mpPageManager;
+
+        // the pagemanager will distribute the image
+        // to one or more surfaces, this is why we
+        // need a list here.
+        std::vector<SurfaceSharedPtr> maSurfaceList;
+
+        // pointer to the source of image data
+        // which always is stored in system memory,
+        // 32bit rgba and can have any size.
+        std::shared_ptr<canvas::IColorBuffer> mpBuffer;
+    };
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */