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#ifndef _CPPCANVAS_CANVASGRAPHICHELPER_HXX
#define _CPPCANVAS_CANVASGRAPHICHELPER_HXX

#include <com/sun/star/rendering/RenderState.hpp>
#include <basegfx/polygon/b2dpolypolygon.hxx>

#include <cppcanvas/canvasgraphic.hxx>

#include <boost/optional.hpp>

namespace com { namespace sun { namespace star { namespace rendering 
{
    class  XGraphicDevice;
} } } }


/* Definition of CanvasGraphicHelper class */

namespace cppcanvas
{

    namespace internal
    {
        
        class CanvasGraphicHelper : public virtual CanvasGraphic
        {
        public:
            CanvasGraphicHelper( const CanvasSharedPtr& rParentCanvas );

            // CanvasGraphic implementation
            virtual void 						     setTransformation( const ::basegfx::B2DHomMatrix& rMatrix );
            virtual ::basegfx::B2DHomMatrix          getTransformation() const;
            virtual void                             setClip( const ::basegfx::B2DPolyPolygon& rClipPoly );
            virtual void                             setClip();
            virtual ::basegfx::B2DPolyPolygon const* getClip() const;
            virtual void                             setRGBAColor( Color::IntSRGBA );
            virtual Color::IntSRGBA                  getRGBAColor() const;
            virtual void                             setCompositeOp( CompositeOp aOp );
            virtual CompositeOp                      getCompositeOp() const;

        protected:
            // for our clients
            // ===============
            CanvasSharedPtr																	getCanvas() const;
            ::com::sun::star::uno::Reference< ::com::sun::star::rendering::XGraphicDevice >	getGraphicDevice() const;
            const ::com::sun::star::rendering::RenderState&                                 getRenderState() const;

        private:
            mutable ::com::sun::star::rendering::RenderState 								maRenderState;

            boost::optional<basegfx::B2DPolyPolygon>                                        maClipPolyPolygon;
            CanvasSharedPtr 																mpCanvas;
            ::com::sun::star::uno::Reference< ::com::sun::star::rendering::XGraphicDevice > mxGraphicDevice;
        };

    }
}

#endif /* _CPPCANVAS_CANVASGRAPHICHELPER_HXX */