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 * This file incorporates work covered by the following license notice:
 *
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 */

#ifndef INCLUDED_CANVAS_SOURCE_CAIRO_CAIRO_CANVASHELPER_HXX
#define INCLUDED_CANVAS_SOURCE_CAIRO_CAIRO_CANVASHELPER_HXX

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

#include <basegfx/vector/b2isize.hxx>
#include <basegfx/vector/b2dsize.hxx>
#include <com/sun/star/rendering/XLinePolyPolygon2D.hpp>

#include <boost/utility.hpp>

#include "cairo_cairo.hxx"
#include "cairo_surfaceprovider.hxx"

class VirtualDevice;

namespace basegfx {
    class B2DPolyPolygon;
}

namespace cairocanvas
{
    class SpriteCanvas;

    enum Operation {
        Stroke,
        Fill,
        Clip
    };

    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,
                   SurfaceProvider&          rSurfaceProvider,
                   ::com::sun::star::rendering::XGraphicDevice* pDevice );

        void setSize( const ::basegfx::B2ISize& rSize );
        void setSurface( const ::cairo::SurfaceSharedPtr& pSurface, 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 >& laidOutText,
                            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() { return css::uno::Reference< css::rendering::XGraphicDevice >(mpDevice); }

        // 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,
                             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();

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

        bool hasAlpha() const { return mbHaveAlpha; }

        enum ColorType
        {
            LINE_COLOR, FILL_COLOR, TEXT_COLOR, IGNORE_COLOR
        };

        void doPolyPolygonPath( const ::com::sun::star::uno::Reference< ::com::sun::star::rendering::XPolyPolygon2D >& xPolyPolygon,
                                Operation aOperation,
                                bool bNoLineJoin = false,
                                const ::com::sun::star::uno::Sequence< ::com::sun::star::rendering::Texture >* pTextures=NULL,
                                ::cairo::Cairo* pCairo=NULL ) const;

        ::com::sun::star::uno::Reference< ::com::sun::star::rendering::XCachedPrimitive > implDrawBitmapSurface(
                   const ::com::sun::star::rendering::XCanvas*      pCanvas,
                   const ::cairo::SurfaceSharedPtr&                 pSurface,
                   const ::com::sun::star::rendering::ViewState&    viewState,
                   const ::com::sun::star::rendering::RenderState&  renderState,
                   const ::com::sun::star::geometry::IntegerSize2D& rSize,
                   bool bModulateColors,
                   bool bHasAlpha );

        bool repaint( const ::cairo::SurfaceSharedPtr& pSurface,
              const ::com::sun::star::rendering::ViewState& viewState,
              const ::com::sun::star::rendering::RenderState& renderState );

    protected:
        /** Surface provider

            Deliberately not a refcounted reference, because of
            potential circular references for canvas. Provides us with
            our output surface and associated functionality.
         */
        SurfaceProvider* mpSurfaceProvider;

        /** Phyical output device

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

    private:

        boost::shared_ptr<VirtualDevice> mpVirtualDevice;

        void useStates( const ::com::sun::star::rendering::ViewState& viewState,
                        const ::com::sun::star::rendering::RenderState& renderState,
                        bool setColor );

        com::sun::star::rendering::IntegerBitmapLayout impl_getMemoryLayout( sal_Int32 nWidth, sal_Int32 nHeight );

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

        ::cairo::CairoSharedPtr     mpCairo;
        ::cairo::SurfaceSharedPtr   mpSurface;
        ::basegfx::B2ISize maSize;

        void clip_cairo_from_dev(::OutputDevice& rOutDev);

    };

    /// also needed from SpriteHelper
    void doPolyPolygonImplementation( ::basegfx::B2DPolyPolygon aPolyPolygon,
                                      Operation aOperation,
                                      ::cairo::Cairo* pCairo,
                                      const ::com::sun::star::uno::Sequence< ::com::sun::star::rendering::Texture >* pTextures,
                                      const SurfaceProviderRef& pDevice,
                                      ::com::sun::star::rendering::FillRule eFillrule );
}

#endif // INCLUDED_CANVAS_SOURCE_CAIRO_CAIRO_CANVASHELPER_HXX

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