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#ifndef _VCLCANVAS_CANVASHELPER_HXX_
#define _VCLCANVAS_CANVASHELPER_HXX_

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

#include <vcl/outdev.hxx>

#include <canvas/vclwrapper.hxx>

#include "cachedbitmap.hxx"
#include "outdevprovider.hxx"

#include <boost/utility.hpp>


namespace vclcanvas
{
    class SpriteCanvas;

    /** Helper class for basic canvas functionality. Also offers
        optional backbuffer painting, when providing it with a second
        OutputDevice to render into.
     */
    class CanvasHelper : private ::boost::noncopyable
    {
    public:
		/** Create canvas helper
         */
        CanvasHelper();

        /// Release all references
        void disposing();

		/** Initialize canvas helper

        	This method late-initializes the canvas helper, providing
        	it with the necessary device and output objects. Note that
        	the CanvasHelper does <em>not</em> take ownership of the
        	passed rDevice reference, nor does it perform any
        	reference counting. Thus, to prevent the reference counted
        	SpriteCanvas object from deletion, the user of this class
        	is responsible for holding ref-counted references itself!

        	@param rDevice
            Reference device this canvas is associated with

            @param rOutDev
            Set primary output device for this canvas. That's where
            all content is output to.

        	@param bProtect
            When true, all output operations preserve outdev
            state. When false, outdev state might change at any time.

        	@param bHaveAlpha
            When true, hasAlpha() will always return true, otherwise, false.
         */
        void init( ::com::sun::star::rendering::XGraphicDevice& rDevice,
                   const OutDevProviderSharedPtr&               rOutDev, 
                   bool                                         bProtect,
                   bool                                         bHaveAlpha );

        /** Set primary output device

        	This changes the primary output device, where rendering is
        	sent to.
         */
        void setOutDev( const OutDevProviderSharedPtr&	rOutDev,
                        bool							bProtect);

        /** Set secondary output device

        	Used for sprites, to generate mask bitmap.
         */
        void setBackgroundOutDev( const OutDevProviderSharedPtr& rOutDev );


        // CanvasHelper functionality
        // ==========================

        // XCanvas (only providing, not implementing the
        // interface. Also note subtle method parameter differences)
        void clear();
        void drawPoint( const ::com::sun::star::rendering::XCanvas* 		rCanvas, 
                        const ::com::sun::star::geometry::RealPoint2D& 		aPoint, 
                        const ::com::sun::star::rendering::ViewState& 		viewState, 
                        const ::com::sun::star::rendering::RenderState& 	renderState );
        void drawLine( const ::com::sun::star::rendering::XCanvas* 		rCanvas, 
                       const ::com::sun::star::geometry::RealPoint2D& 	aStartPoint, 
                       const ::com::sun::star::geometry::RealPoint2D& 	aEndPoint, 
                       const ::com::sun::star::rendering::ViewState& 	viewState, 
                       const ::com::sun::star::rendering::RenderState& 	renderState	);
        void drawBezier( const ::com::sun::star::rendering::XCanvas* 			rCanvas, 
                         const ::com::sun::star::geometry::RealBezierSegment2D&	aBezierSegment, 
                         const ::com::sun::star::geometry::RealPoint2D& 		aEndPoint,
                         const ::com::sun::star::rendering::ViewState& 			viewState, 
                         const ::com::sun::star::rendering::RenderState& 		renderState );
        ::com::sun::star::uno::Reference< ::com::sun::star::rendering::XCachedPrimitive > 	
        	drawPolyPolygon( const ::com::sun::star::rendering::XCanvas* 		rCanvas, 
                             const ::com::sun::star::uno::Reference< 
                             	::com::sun::star::rendering::XPolyPolygon2D >& 	xPolyPolygon, 
                             const ::com::sun::star::rendering::ViewState& 		viewState, 
                             const ::com::sun::star::rendering::RenderState& 	renderState );
        ::com::sun::star::uno::Reference< ::com::sun::star::rendering::XCachedPrimitive > 	
        	strokePolyPolygon( const ::com::sun::star::rendering::XCanvas* 			rCanvas, 
                               const ::com::sun::star::uno::Reference< 
                               		::com::sun::star::rendering::XPolyPolygon2D >& 	xPolyPolygon, 
                               const ::com::sun::star::rendering::ViewState& 		viewState, 
                               const ::com::sun::star::rendering::RenderState& 		renderState, 
                               const ::com::sun::star::rendering::StrokeAttributes& strokeAttributes );
        ::com::sun::star::uno::Reference< ::com::sun::star::rendering::XCachedPrimitive > 	
        	strokeTexturedPolyPolygon( const ::com::sun::star::rendering::XCanvas* 			rCanvas, 
                                       const ::com::sun::star::uno::Reference< 
                                       		::com::sun::star::rendering::XPolyPolygon2D >& 	xPolyPolygon, 
                                       const ::com::sun::star::rendering::ViewState& 		viewState, 
                                       const ::com::sun::star::rendering::RenderState& 		renderState, 
                                       const ::com::sun::star::uno::Sequence< 
                                       		::com::sun::star::rendering::Texture >& 		textures, 
                                       const ::com::sun::star::rendering::StrokeAttributes& strokeAttributes );
        ::com::sun::star::uno::Reference< ::com::sun::star::rendering::XCachedPrimitive > 	
        	strokeTextureMappedPolyPolygon( const ::com::sun::star::rendering::XCanvas* 			rCanvas, 
                                            const ::com::sun::star::uno::Reference< 
                                            		::com::sun::star::rendering::XPolyPolygon2D >& 	xPolyPolygon, 
                                            const ::com::sun::star::rendering::ViewState& 			viewState, 
                                            const ::com::sun::star::rendering::RenderState& 		renderState, 
                                            const ::com::sun::star::uno::Sequence< 
                                            		::com::sun::star::rendering::Texture >& 		textures, 
                                            const ::com::sun::star::uno::Reference< 
                                            		::com::sun::star::geometry::XMapping2D >& 		xMapping, 
                                            const ::com::sun::star::rendering::StrokeAttributes& 	strokeAttributes );
        ::com::sun::star::uno::Reference< ::com::sun::star::rendering::XPolyPolygon2D >   	
        	queryStrokeShapes( const ::com::sun::star::rendering::XCanvas* 			rCanvas, 
                               const ::com::sun::star::uno::Reference< 
                               		::com::sun::star::rendering::XPolyPolygon2D >& 	xPolyPolygon, 
                               const ::com::sun::star::rendering::ViewState& 		viewState, 
                               const ::com::sun::star::rendering::RenderState& 		renderState, 
                               const ::com::sun::star::rendering::StrokeAttributes& strokeAttributes );
        ::com::sun::star::uno::Reference< ::com::sun::star::rendering::XCachedPrimitive > 	
        	fillPolyPolygon( const ::com::sun::star::rendering::XCanvas* 			rCanvas, 
                             const ::com::sun::star::uno::Reference< 
                             		::com::sun::star::rendering::XPolyPolygon2D >& 	xPolyPolygon, 
                             const ::com::sun::star::rendering::ViewState& 			viewState, 
                             const ::com::sun::star::rendering::RenderState& 		renderState );
        ::com::sun::star::uno::Reference< ::com::sun::star::rendering::XCachedPrimitive > 	
        	fillTexturedPolyPolygon( const ::com::sun::star::rendering::XCanvas* 			rCanvas, 
                                     const ::com::sun::star::uno::Reference< 
                                     		::com::sun::star::rendering::XPolyPolygon2D >&	xPolyPolygon, 
                                     const ::com::sun::star::rendering::ViewState& 			viewState, 
                                     const ::com::sun::star::rendering::RenderState& 		renderState, 
                                     const ::com::sun::star::uno::Sequence< 
                                     		::com::sun::star::rendering::Texture >& 		textures );
        ::com::sun::star::uno::Reference< ::com::sun::star::rendering::XCachedPrimitive > 	
        	fillTextureMappedPolyPolygon( const ::com::sun::star::rendering::XCanvas* 			rCanvas, 
                                          const ::com::sun::star::uno::Reference< 
                                          		::com::sun::star::rendering::XPolyPolygon2D >& 	xPolyPolygon, 
                                          const ::com::sun::star::rendering::ViewState& 		viewState, 
                                          const ::com::sun::star::rendering::RenderState& 		renderState, 
                                          const ::com::sun::star::uno::Sequence< 
                                          		::com::sun::star::rendering::Texture >& 		textures, 
                                          const ::com::sun::star::uno::Reference< 
                                          		::com::sun::star::geometry::XMapping2D >& 		xMapping );

        ::com::sun::star::uno::Reference< ::com::sun::star::rendering::XCanvasFont > 
	        createFont( const ::com::sun::star::rendering::XCanvas* 		rCanvas,
                        const ::com::sun::star::rendering::FontRequest& 	fontRequest, 
                        const ::com::sun::star::uno::Sequence< 
                        	::com::sun::star::beans::PropertyValue >& 		extraFontProperties, 
                        const ::com::sun::star::geometry::Matrix2D& 		fontMatrix );

        ::com::sun::star::uno::Sequence< ::com::sun::star::rendering::FontInfo > 
        	queryAvailableFonts( const ::com::sun::star::rendering::XCanvas* 		rCanvas,
                                 const ::com::sun::star::rendering::FontInfo& 		aFilter, 
                                 const ::com::sun::star::uno::Sequence< 
                                 		::com::sun::star::beans::PropertyValue >& 	aFontProperties );

        ::com::sun::star::uno::Reference< ::com::sun::star::rendering::XCachedPrimitive > 
        	drawText( const ::com::sun::star::rendering::XCanvas* 		rCanvas,
                      const ::com::sun::star::rendering::StringContext& text, 
                      const ::com::sun::star::uno::Reference< 
                      		::com::sun::star::rendering::XCanvasFont >& xFont, 
                      const ::com::sun::star::rendering::ViewState& 	viewState, 
                      const ::com::sun::star::rendering::RenderState& 	renderState, 
                      sal_Int8 											textDirection );

        ::com::sun::star::uno::Reference< ::com::sun::star::rendering::XCachedPrimitive > 
        	drawTextLayout( const ::com::sun::star::rendering::XCanvas* 		rCanvas,
                            const ::com::sun::star::uno::Reference< 
                            		::com::sun::star::rendering::XTextLayout >& layoutetText, 
                            const ::com::sun::star::rendering::ViewState& 		viewState, 
                            const ::com::sun::star::rendering::RenderState& 	renderState );

        ::com::sun::star::uno::Reference< ::com::sun::star::rendering::XCachedPrimitive > 	
        	drawBitmap( const ::com::sun::star::rendering::XCanvas* 	rCanvas,
                        const ::com::sun::star::uno::Reference< 
                        		::com::sun::star::rendering::XBitmap >& xBitmap, 
                        const ::com::sun::star::rendering::ViewState& 	viewState, 
                        const ::com::sun::star::rendering::RenderState& renderState );
        ::com::sun::star::uno::Reference< ::com::sun::star::rendering::XCachedPrimitive > 	
        	drawBitmapModulated( const ::com::sun::star::rendering::XCanvas* 		rCanvas,
                                 const ::com::sun::star::uno::Reference< 
                                 		::com::sun::star::rendering::XBitmap >&		xBitmap, 
                                 const ::com::sun::star::rendering::ViewState& 		viewState, 
                                 const ::com::sun::star::rendering::RenderState&	renderState );
        ::com::sun::star::uno::Reference< ::com::sun::star::rendering::XGraphicDevice > 
        	getDevice();

        // BitmapCanvasHelper functionality
        // ================================

        void copyRect( const ::com::sun::star::rendering::XCanvas* 			rCanvas,
                       const ::com::sun::star::uno::Reference< 
                       		::com::sun::star::rendering::XBitmapCanvas >& 	sourceCanvas, 
                       const ::com::sun::star::geometry::RealRectangle2D& 	sourceRect, 
                       const ::com::sun::star::rendering::ViewState& 		sourceViewState, 
                       const ::com::sun::star::rendering::RenderState& 		sourceRenderState, 
                       const ::com::sun::star::geometry::RealRectangle2D& 	destRect, 
                       const ::com::sun::star::rendering::ViewState& 		destViewState, 
                       const ::com::sun::star::rendering::RenderState& 		destRenderState );
            
        ::com::sun::star::geometry::IntegerSize2D getSize();

        ::com::sun::star::uno::Reference< ::com::sun::star::rendering::XBitmapCanvas > queryBitmapCanvas();

        ::com::sun::star::uno::Reference< ::com::sun::star::rendering::XBitmap > 
        	getScaledBitmap( const ::com::sun::star::geometry::RealSize2D& 	newSize, 
                             sal_Bool 												beFast );

        ::com::sun::star::uno::Sequence< sal_Int8 > 
	        getData( ::com::sun::star::rendering::IntegerBitmapLayout& 		bitmapLayout,
                     const ::com::sun::star::geometry::IntegerRectangle2D&	rect );

        void setData( const ::com::sun::star::uno::Sequence< sal_Int8 >& 		data, 
                      const ::com::sun::star::rendering::IntegerBitmapLayout& 	bitmapLayout, 
                      const ::com::sun::star::geometry::IntegerRectangle2D& 	rect );

        void setPixel( const ::com::sun::star::uno::Sequence< sal_Int8 >& 		color, 
                       const ::com::sun::star::rendering::IntegerBitmapLayout&	bitmapLayout, 
                       const ::com::sun::star::geometry::IntegerPoint2D& 		pos );

        ::com::sun::star::uno::Sequence< sal_Int8 > 
	        getPixel( ::com::sun::star::rendering::IntegerBitmapLayout& bitmapLayout, 
                      const ::com::sun::star::geometry::IntegerPoint2D& pos );

        ::com::sun::star::rendering::IntegerBitmapLayout getMemoryLayout();

        /// Repaint a cached bitmap
        bool repaint( const GraphicObjectSharedPtr&                   rGrf,
                      const ::com::sun::star::rendering::ViewState&   viewState,
                      const ::com::sun::star::rendering::RenderState& renderState,
                      const ::Point&                                  rPt, 
                      const ::Size&                                   rSz,
                      const GraphicAttr&                              rAttr ) const;

        /** Flush drawing queue.

            This only works for Window canvases, and ensures that all
            pending render operations are flushed to the
            driver/hardware.
         */
        void flush() const;

        enum ColorType
        {
            LINE_COLOR, FILL_COLOR, TEXT_COLOR, IGNORE_COLOR
        };
        
        // returns transparency of color
        int setupOutDevState( const ::com::sun::star::rendering::ViewState& 	viewState, 
                              const ::com::sun::star::rendering::RenderState& 	renderState,
                              ColorType											eColorType ) const;

        /** Called from XCanvas base classes, to notify that content
            is _about_ to change
        */
        void modifying() {}

        bool hasAlpha() const { return mbHaveAlpha; }

    protected:
        /** Phyical output device

            Deliberately not a refcounted reference, because of
            potential circular references for spritecanvas.
         */
        ::com::sun::star::rendering::XGraphicDevice* mpDevice;

        /// Rendering to this outdev preserves its state
        OutDevProviderSharedPtr                      mpProtectedOutDev;

        /// Rendering to this outdev does not preserve its state
        OutDevProviderSharedPtr                      mpOutDev;

        /// Rendering to this outdev does not preserve its state
        OutDevProviderSharedPtr                      mp2ndOutDev;

        /// When true, content is able to represent alpha
        bool                                         mbHaveAlpha;

    private:
        ::com::sun::star::uno::Reference< ::com::sun::star::rendering::XCachedPrimitive > 	
        	implDrawBitmap( const ::com::sun::star::rendering::XCanvas* 	rCanvas,
                            const ::com::sun::star::uno::Reference< 
                  		          ::com::sun::star::rendering::XBitmap >& 	xBitmap, 
                            const ::com::sun::star::rendering::ViewState& 	viewState, 
                            const ::com::sun::star::rendering::RenderState& renderState,
                            bool 											bModulateColors );

        bool setupTextOutput( ::Point&																				o_rOutPos,
                              const ::com::sun::star::rendering::ViewState& 										viewState, 
                              const ::com::sun::star::rendering::RenderState& 										renderState, 
                              const ::com::sun::star::uno::Reference< ::com::sun::star::rendering::XCanvasFont >&	xFont ) const;

    };
}

#endif /* _VCLCANVAS_CANVASHELPER_HXX_ */
