libreoffice/cppcanvas/source/inc/implrenderer.hxx

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 * OpenOffice.org - a multi-platform office productivity suite
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 * $RCSfile: implrenderer.hxx,v $
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#ifndef _CPPCANVAS_IMPLRENDERER_HXX
#define _CPPCANVAS_IMPLRENDERER_HXX

#include <sal/types.h>

#ifndef BOOST_SHARED_PTR_HPP_INCLUDED
#include <boost/shared_ptr.hpp>
#endif
#include <cppcanvas/renderer.hxx>
#include <cppcanvas/canvas.hxx>

#include <canvasgraphichelper.hxx>
#include <action.hxx>

#include <vector>

class GDIMetaFile;
class VirtualDevice;
class Gradient;
class BitmapEx;
class MapMode;
class Size;

namespace basegfx {
    class B2DPolyPolygon;
    class B2DPolygon;
}

namespace cppcanvas
{

    namespace internal
    {
        struct OutDevState;
        struct ActionFactoryParameters;

        // state stack of OutputDevice, to correctly handle
        // push/pop actions
        typedef ::std::vector< OutDevState >    VectorOfOutDevStates;

        class ImplRenderer : public virtual Renderer, protected CanvasGraphicHelper
        {
        public:
            ImplRenderer( const CanvasSharedPtr&    rCanvas,
                          const GDIMetaFile&        rMtf,
                          const Parameters&         rParms );
            ImplRenderer( const CanvasSharedPtr&    rCanvas,
                          const BitmapEx&           rBmpEx,
                          const Parameters&         rParms );

            virtual ~ImplRenderer();

            virtual bool                draw() const;
            virtual bool                drawSubset( sal_Int32   nStartIndex,
                                                    sal_Int32   nEndIndex ) const;
            virtual ::basegfx::B2DRange getSubsetArea( sal_Int32    nStartIndex,
                                                       sal_Int32    nEndIndex ) const;


            // element of the Renderer's action vector. Need to be
            // public, since some functors need it, too.
            struct MtfAction
            {
                MtfAction( const ActionSharedPtr&   rAction,
                           sal_Int32                nOrigIndex ) :
                    mpAction( rAction ),
                    mnOrigIndex( nOrigIndex )
                {
                }

                ActionSharedPtr mpAction;
                sal_Int32       mnOrigIndex;
            };

            // prefetched and prepared canvas actions
            // (externally not visible)
            typedef ::std::vector< MtfAction >      ActionVector;


        private:
            // default: disabled copy/assignment
            ImplRenderer(const ImplRenderer&);
            ImplRenderer& operator=( const ImplRenderer& );

            void updateClipping( const ::basegfx::B2DPolyPolygon&   rClipPoly,
                                 const ActionFactoryParameters&     rParms,
                                 bool                               bIntersect );

            void updateClipping( const ::Rectangle&                 rClipRect,
                                 const ActionFactoryParameters&     rParms,
                                 bool                               bIntersect );

            ::com::sun::star::uno::Reference<
                ::com::sun::star::rendering::XCanvasFont > createFont( double&                         o_rFontRotation,
                                                                       const ::Font&                   rFont,
                                                                       const ActionFactoryParameters&  rParms ) const;
            bool createActions( GDIMetaFile&                    rMtf,
                                const ActionFactoryParameters&  rParms,
                                bool                            bSubsettableActions );
            bool createFillAndStroke( const ::basegfx::B2DPolyPolygon& rPolyPoly,
                                      const ActionFactoryParameters&   rParms );
            bool createFillAndStroke( const ::basegfx::B2DPolygon&   rPoly,
                                      const ActionFactoryParameters& rParms );
            void skipContent( GDIMetaFile& rMtf,
                              const char*  pCommentString,
                              sal_Int32&   io_rCurrActionIndex ) const;

            bool isActionContained( GDIMetaFile& rMtf,
                                    const char*  pCommentString,
                                    USHORT       nType ) const;

            void createGradientAction( const ::PolyPolygon&           rPoly,
                                       const ::Gradient&              rGradient,
                                       const ActionFactoryParameters& rParms,
                                       bool                           bIsPolygonRectangle,
                                       bool                           bSubsettableActions );

            void createTextAction( const ::Point&                 rStartPoint,
                                   const String                   rString,
                                   int                            nIndex,
                                   int                            nLength,
                                   const sal_Int32*               pCharWidths,
                                   const ActionFactoryParameters& rParms,
                                   bool                           bSubsettable );

            bool getSubsetIndices( sal_Int32&                    io_rStartIndex,
                                   sal_Int32&                    io_rEndIndex,
                                   ActionVector::const_iterator& o_rRangeBegin,
                                   ActionVector::const_iterator& o_rRangeEnd ) const;


            ActionVector maActions;
        };


        /// Common parameters when creating actions
        struct ActionFactoryParameters
        {
            ActionFactoryParameters( VectorOfOutDevStates&       rStates,
                                     const CanvasSharedPtr&      rCanvas,
                                     ::VirtualDevice&            rVDev,
                                     const Renderer::Parameters& rParms,
                                     sal_Int32&                  io_rCurrActionIndex ) :
                mrStates(rStates),
                mrCanvas(rCanvas),
                mrVDev(rVDev),
                mrParms(rParms),
                mrCurrActionIndex(io_rCurrActionIndex)
            {}

            VectorOfOutDevStates&       mrStates;
            const CanvasSharedPtr&      mrCanvas;
            ::VirtualDevice&            mrVDev;
            const Renderer::Parameters& mrParms;
            sal_Int32&                  mrCurrActionIndex;
        };
    }
}

#endif /* _CPPCANVAS_IMPLRENDERER_HXX */