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diff --git a/canvas/inc/rendering/isurface.hxx b/canvas/inc/rendering/isurface.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 B2IRange;
+ class B2IPoint;
+}
+
+namespace canvas
+{
+ struct IColorBuffer;
+
+ struct ISurface
+ {
+ virtual ~ISurface() {}
+
+ /** Select texture behind this interface to be the current one
+ for primitive output.
+ */
+ virtual bool selectTexture() = 0;
+
+ /** Tells whether the surface is valid or not
+ */
+ virtual bool isValid() = 0;
+
+ /** Update surface content from given IColorBuffer
+
+ This method updates the given subarea of the surface from
+ the given color buffer bits.
+
+ @param rDestPos
+ Position in the surface, where the subset update should
+ have its left, top edge
+
+ @param rSourceRect
+ Size and position of the rectangular subset update in the
+ source color buffer
+
+ @param rSource
+ Source bits to use for the update
+
+ @return true, if the update was successful
+ */
+ virtual bool update( const ::basegfx::B2IPoint& rDestPos,
+ const ::basegfx::B2IRange& rSourceRect,
+ IColorBuffer& rSource ) = 0;
+ };
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */