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#ifndef INCLUDED_BASEGFX_PIXEL_BPIXEL_HXX
#define INCLUDED_BASEGFX_PIXEL_BPIXEL_HXX

#include <sal/types.h>
#include <basegfx/numeric/ftools.hxx>
#include <basegfx/color/bcolor.hxx>
#include <basegfx/basegfxdllapi.h>

namespace basegfx
{
    class BASEGFX_DLLPUBLIC BPixel
    {
    protected:
        union
        {
            struct
            {
                // bitfield
                unsigned                                mnR : 8;        // red intensity
                unsigned                                mnG : 8;        // green intensity
                unsigned                                mnB : 8;        // blue intensity
                unsigned                                mnO : 8;        // opacity, 0 == full transparence
            } maRGBO;

            struct
            {
                // bitfield
                unsigned                                mnValue : 32;   // all values
            } maCombinedRGBO;
        } maPixelUnion;

    public:
        BPixel()
        {
            maPixelUnion.maCombinedRGBO.mnValue = 0L;
        }

        // use explicit here to make sure everyone knows what he is doing. Values range from
        // 0..255 integer here.
        explicit BPixel(sal_uInt8 nRed, sal_uInt8 nGreen, sal_uInt8 nBlue, sal_uInt8 nOpacity)
        {
            maPixelUnion.maRGBO.mnR = nRed;
            maPixelUnion.maRGBO.mnG = nGreen;
            maPixelUnion.maRGBO.mnB = nBlue;
            maPixelUnion.maRGBO.mnO = nOpacity;
        }

        // constructor from BColor which uses double precision color, so change it
        // to local integer format. It will also be clamped here.
        BPixel(const BColor& rColor, sal_uInt8 nOpacity)
        {
            maPixelUnion.maRGBO.mnR = sal_uInt8((rColor.getRed() * 255.0) + 0.5);
            maPixelUnion.maRGBO.mnG = sal_uInt8((rColor.getGreen() * 255.0) + 0.5);
            maPixelUnion.maRGBO.mnB = sal_uInt8((rColor.getBlue() * 255.0) + 0.5);
            maPixelUnion.maRGBO.mnO = nOpacity;
        }

        // copy constructor
        BPixel(const BPixel& rPixel)
        {
            maPixelUnion.maCombinedRGBO.mnValue = rPixel.maPixelUnion.maCombinedRGBO.mnValue;
        }

        ~BPixel()
        {}

        // assignment operator
        BPixel& operator=( const BPixel& rPixel )
        {
            maPixelUnion.maCombinedRGBO.mnValue = rPixel.maPixelUnion.maCombinedRGBO.mnValue;
            return *this;
        }

        // data access read
        sal_uInt8 getRed() const { return maPixelUnion.maRGBO.mnR; }
        sal_uInt8 getGreen() const { return maPixelUnion.maRGBO.mnG; }
        sal_uInt8 getBlue() const { return maPixelUnion.maRGBO.mnB; }
        sal_uInt8 getOpacity() const { return maPixelUnion.maRGBO.mnO; }

        // data access write
        void setRed(sal_uInt8 nNew) { maPixelUnion.maRGBO.mnR = nNew; }
        void setGreen(sal_uInt8 nNew) { maPixelUnion.maRGBO.mnG = nNew; }
        void setBlue(sal_uInt8 nNew) { maPixelUnion.maRGBO.mnB = nNew; }
        void setOpacity(sal_uInt8 nNew) { maPixelUnion.maRGBO.mnO = nNew; }

        // comparators
        bool operator==( const BPixel& rPixel ) const
        {
            return (rPixel.maPixelUnion.maCombinedRGBO.mnValue == maPixelUnion.maCombinedRGBO.mnValue);
        }

        bool operator!=( const BPixel& rPixel ) const
        {
            return (rPixel.maPixelUnion.maCombinedRGBO.mnValue != maPixelUnion.maCombinedRGBO.mnValue);
        }
    };


} // end of namespace basegfx

#endif // INCLUDED_BASEGFX_PIXEL_BPIXEL_HXX

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