AOO410/main/basebmp/inc/basebmp/genericcolorimageaccessor.hxx

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#ifndef INCLUDED_BASEBMP_GENERICCOLORIMAGEACCESSOR_HXX
#define INCLUDED_BASEBMP_GENERICCOLORIMAGEACCESSOR_HXX

#include <basebmp/color.hxx>
#include <basebmp/bitmapdevice.hxx>

namespace basebmp
{
    /** Access a BitmapDevice generically

        This accessor deals with an opaque BitmapDevice generically,
        via getPixel()/setPixel() at the published interface.
     */
    class GenericColorImageAccessor
    {
        BitmapDeviceSharedPtr mpDevice;
        DrawMode              meDrawMode;

    public:
        typedef Color value_type;

        explicit GenericColorImageAccessor( BitmapDeviceSharedPtr const& rTarget ) :
            mpDevice(rTarget),
            meDrawMode(DrawMode_PAINT)
        {}

        GenericColorImageAccessor( BitmapDeviceSharedPtr const& rTarget, 
                                   DrawMode                     eDrawMode ) :
            mpDevice(rTarget),
            meDrawMode(eDrawMode)
        {}

        template< typename Iterator > 
        Color operator()( Iterator const& i ) const
        { return mpDevice->getPixel( basegfx::B2IPoint( i->x,i->y ) ); }

        template< typename Iterator, typename Difference > 
        Color operator()( Iterator const& i, Difference const& diff) const
        { return mpDevice->getPixel( basegfx::B2IPoint( i[diff]->x,
                                                        i[diff]->y ) ); }

        template< typename Iterator >
        void set(Color const& value, Iterator const& i) const
        { return mpDevice->setPixel( basegfx::B2IPoint( i->x,i->y ),
                                     value, meDrawMode ); }

        template< class Iterator, class Difference >
        void set(value_type const& value, Iterator const& i, Difference const& diff) const
        { return mpDevice->setPixel( basegfx::B2IPoint( i[diff]->x,
                                                        i[diff]->y ),
                                     value, meDrawMode ); }
    };
}

#endif /* INCLUDED_BASEBMP_GENERICCOLORIMAGEACCESSOR_HXX */