/* -*- 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 <memory>

class OutputDevice;

namespace vclcanvas

{

    /* Definition of OutDevProvider interface */

    /** Implementers of this interface provide the CanvasHelper

        with its OutputDevice.

        This additional level of indirection was necessary, as the

        OutputDevice is not an interface. There had to be a mechanism

        to detect the moment when an OutputDevice is rendered to

        (e.g. for the BitmapBackBuffer).

     */

    class OutDevProvider

    {

    public:

        virtual ~OutDevProvider() {}

        virtual OutputDevice&       getOutDev() = 0;

        virtual const OutputDevice& getOutDev() const = 0;

    };

    typedef std::shared_ptr< OutDevProvider > OutDevProviderSharedPtr;

}

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