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 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
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 * with the License.  You may obtain a copy of the License at
 * 
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#ifndef _VCLCANVAS_BACKBUFFER_HXX_
#define _VCLCANVAS_BACKBUFFER_HXX_

#include <vcl/virdev.hxx>

#include <canvas/vclwrapper.hxx>
#include "outdevprovider.hxx"

#include <boost/shared_ptr.hpp>


namespace vclcanvas
{
    /// Background buffer abstraction
	class BackBuffer : public OutDevProvider
    {
    public:
        /** Create a backbuffer for given reference device

        	@param bMonochromeBuffer
            When false, default depth of reference device is
            chosen. When true, the buffer will be monochrome, i.e. one
            bit deep.
         */
        BackBuffer( const OutputDevice& rRefDevice, 
                    bool 				bMonochromeBuffer=false );
        
        virtual OutputDevice& 		getOutDev();
        virtual const OutputDevice&	getOutDev() const;
        
        void setSize( const ::Size& rNewSize );
        
    private:
        ::canvas::vcltools::VCLObject<VirtualDevice>	maVDev;            
    };

    typedef ::boost::shared_ptr< BackBuffer > BackBufferSharedPtr;
}

#endif /* #ifndef _VCLCANVAS_BACKBUFFER_HXX_ */