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diff --git a/canvas/inc/rendering/isurfaceproxy.hxx b/canvas/inc/rendering/isurfaceproxy.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
+
+namespace basegfx
+{
+ class B2DRange;
+ class B2DPoint;
+ class B2DPolyPolygon;
+ class B2DHomMatrix;
+}
+
+namespace canvas
+{
+ struct ISurfaceProxy
+ {
+ virtual ~ISurfaceProxy() {}
+
+ /** Notify the proxy that the color buffer has changed
+ */
+ virtual void setColorBufferDirty() = 0;
+
+ /** 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 ) = 0;
+
+ /** 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 ) = 0;
+
+ /** 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 ) = 0;
+ };
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */