libreoffice/canvas/source/vcl/backbuffer.hxx

/* -*- 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/virdev.hxx>

#include "outdevprovider.hxx"

#include <memory>

namespace vclcanvas
{
    /// Background buffer abstraction
    class BackBuffer : public OutDevProvider
    {
    public:
        /** Create a backbuffer for given reference device */
        BackBuffer( const OutputDevice& rRefDevice );
        virtual ~BackBuffer() override;

        virtual OutputDevice&       getOutDev() override;
        virtual const OutputDevice& getOutDev() const override;

        void setSize( const ::Size& rNewSize );

    private:
        VclPtr< VirtualDevice > maVDev;
    };

    typedef std::shared_ptr< BackBuffer > BackBufferSharedPtr;
}

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