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#ifndef _CAIROCANVAS_SPRITECANVASHELPER_HXX_
#define _CAIROCANVAS_SPRITECANVASHELPER_HXX_

#include <com/sun/star/rendering/XSpriteCanvas.hpp>
#include <com/sun/star/rendering/XIntegerBitmap.hpp>

#include <canvas/spriteredrawmanager.hxx>

#include "cairo_cairo.hxx"
#include "cairo_canvashelper.hxx"

namespace basegfx
{
    class B2IRange;
}

namespace cairocanvas
{
    class SpriteCanvas;

    class SpriteCanvasHelper : public CanvasHelper
    {
    public:
        SpriteCanvasHelper();

        void init( ::canvas::SpriteRedrawManager& rManager, 
                   SpriteCanvas&                  rOwningSpriteCanvas,
                   const ::basegfx::B2ISize&      rSize );
    
        /// Dispose all internal references
        void disposing();

        // XSpriteCanvas
        ::com::sun::star::uno::Reference< 
  			::com::sun::star::rendering::XAnimatedSprite > 		createSpriteFromAnimation( 
                const ::com::sun::star::uno::Reference< ::com::sun::star::rendering::XAnimation >& animation );

        ::com::sun::star::uno::Reference< 
  			::com::sun::star::rendering::XAnimatedSprite > 		createSpriteFromBitmaps( 
                const ::com::sun::star::uno::Sequence< 
                	  ::com::sun::star::uno::Reference< 
                			::com::sun::star::rendering::XBitmap > >& animationBitmaps, 
                sal_Int8                                              interpolationMode );
    
        ::com::sun::star::uno::Reference< 
  			::com::sun::star::rendering::XCustomSprite > 		createCustomSprite( 
                const ::com::sun::star::geometry::RealSize2D& spriteSize );
    
        ::com::sun::star::uno::Reference< 
  			::com::sun::star::rendering::XSprite > 				createClonedSprite( 
                const ::com::sun::star::uno::Reference< ::com::sun::star::rendering::XSprite >& original );

        /** Actually perform the screen update

            @param rCurrArea
            Current window area in absolute screen coordinates

        	@param bUpdateAll
            sal_True, if everything must be updated, not only changed
            sprites

            @param io_bSurfaceDirty
            In/out parameter, whether backbuffer surface is dirty (if
            yes, we're performing a full update, anyway)
         */
        sal_Bool updateScreen( const ::basegfx::B2IRange& rCurrArea,
                               sal_Bool                   bUpdateAll,
                               bool&                      io_bSurfaceDirty );


        // SpriteRedrawManager functor calls
        // -------------------------------------------------

        /** Gets called for simple background repaints
         */
        void backgroundPaint( const ::basegfx::B2DRange& rUpdateRect );

        /** Gets called when area can be handled by scrolling.

        	Called method must copy screen content from rMoveStart to
        	rMoveEnd, and restore the background in the uncovered
        	areas.

            @param rMoveStart
            Source rect of the scroll

            @param rMoveEnd
            Dest rect of the scroll

            @param rUpdateArea
            All info necessary, should rMoveStart be partially or
            fully outside the outdev
         */
        void scrollUpdate( const ::basegfx::B2DRange& 							rMoveStart, 
                           const ::basegfx::B2DRange& 							rMoveEnd,
                           const ::canvas::SpriteRedrawManager::UpdateArea& 	rUpdateArea );

        void opaqueUpdate( const ::basegfx::B2DRange&                          rTotalArea,
                           const ::std::vector< ::canvas::Sprite::Reference >& rSortedUpdateSprites );                    

        void genericUpdate( const ::basegfx::B2DRange&                          rTotalArea,
                            const ::std::vector< ::canvas::Sprite::Reference >& rSortedUpdateSprites );                    

    private:
        ::cairo::SurfaceSharedPtr getCompositingSurface( const ::basegfx::B2ISize& rNeededSize );

        /// Set from the SpriteCanvas: instance coordinating sprite redraw
    	::canvas::SpriteRedrawManager*	mpRedrawManager;

        /// Set from the init method. used to generate sprites
        SpriteCanvas*                   mpOwningSpriteCanvas;

        /// a temporary surface used to composite the frontbuffer image
        ::cairo::SurfaceSharedPtr           mpCompositingSurface;
        ::basegfx::B2ISize               maCompositingSurfaceSize;
    };
}

#endif /* _CAIROCANVAS_SPRITECANVASHELPER_HXX_ */

