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 * Licensed to the Apache Software Foundation (ASF) under one
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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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 * 
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#ifndef _NULLCANVAS_CANVASHELPER_HXX_
#define _NULLCANVAS_CANVASHELPER_HXX_

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

#include <basegfx/vector/b2isize.hxx>
#include <basegfx/vector/b2dsize.hxx>

#include <boost/utility.hpp>


namespace nullcanvas
{
    class SpriteCanvas;

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

        /// Release all references
        void disposing();

		/** Initialize canvas helper

        	This method late-initializes the canvas helper, providing
        	it with the necessary device and size. 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 rSizePixel
            Size of the output surface in pixel.

        	@param rDevice
            Reference device this canvas is associated with

         */
        void init( const ::basegfx::B2ISize& rSizePixel,
                   SpriteCanvas&             rDevice,
                   bool                      bHasAlpha );


        // 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* 	pCanvas, 
                        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* 		pCanvas, 
                       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* 			pCanvas, 
                         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* 			pCanvas, 
                             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* 			pCanvas, 
                               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* 			pCanvas, 
                                       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* 			pCanvas, 
                                            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* 			pCanvas, 
                               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* 			pCanvas, 
                             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* 			pCanvas, 
                                     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* 			pCanvas, 
                                          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 > SAL_CALL
        	createFont( const ::com::sun::star::rendering::XCanvas* 			pCanvas, 
                        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* 		pCanvas, 
                                 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* 			pCanvas, 
                      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* 	pCanvas, 
                            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* 	pCanvas, 
                        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* 		pCanvas, 
                                 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* 			pCanvas, 
                       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::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::uno::Reference< ::com::sun::star::rendering::XBitmapPalette > getPalette();

        ::com::sun::star::rendering::IntegerBitmapLayout getMemoryLayout();
        
        // Flush drawing queue to screen
        void					flush() const;

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

        bool hasAlpha() const;

    protected:
        /** Phyical output device

            Deliberately not a refcounted reference, because of
            potential circular references for spritecanvas.
         */
        SpriteCanvas*                   mpDevice;

    private:
        /// Current size of the output surface in pixel
        ::basegfx::B2ISize				maSize;

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

#endif /* _NULLCANVAS_CANVASHELPER_HXX_ */