/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/*

 * This file is part of the LibreOffice project.

 *

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/.

 *

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

 *

 *   Licensed to the Apache Software Foundation (ASF) under one or more

 *   contributor license agreements. See the NOTICE file distributed

 *   with this work for additional information regarding copyright

 *   ownership. The ASF licenses this file to you under the Apache

 *   License, Version 2.0 (the "License"); you may not use this file

 *   except in compliance with the License. You may obtain a copy of

 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .

 */

#pragma once

#include <sal/types.h>

#include <basegfx/color/bcolor.hxx>

namespace basegfx

{

    class BPixel final

    {

        union

        {

            struct

            {

                unsigned                                mnR : 8;        // red intensity

                unsigned                                mnG : 8;        // green intensity

                unsigned                                mnB : 8;        // blue intensity

                unsigned                                mnA : 8;        // opacity, 0 == full transparence

            } maRGBA;

            struct

            {

                unsigned                                mnValue : 32;   // all values

            } maCombinedRGBA;

        } maPixelUnion;

    public:

        BPixel()

        {

            maPixelUnion.maCombinedRGBA.mnValue = 0;

        }

        // 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 nAlpha)

        {

            maPixelUnion.maRGBA.mnR = nRed;

            maPixelUnion.maRGBA.mnG = nGreen;

            maPixelUnion.maRGBA.mnB = nBlue;

            maPixelUnion.maRGBA.mnA = nAlpha;

        }

        // 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 nAlpha)

        {

            maPixelUnion.maRGBA.mnR = sal_uInt8((rColor.getRed() * 255.0) + 0.5);

            maPixelUnion.maRGBA.mnG = sal_uInt8((rColor.getGreen() * 255.0) + 0.5);

            maPixelUnion.maRGBA.mnB = sal_uInt8((rColor.getBlue() * 255.0) + 0.5);

            maPixelUnion.maRGBA.mnA = nAlpha;

        }

        // data access read

        sal_uInt8 getRed() const { return maPixelUnion.maRGBA.mnR; }

        sal_uInt8 getGreen() const { return maPixelUnion.maRGBA.mnG; }

        sal_uInt8 getBlue() const { return maPixelUnion.maRGBA.mnB; }

        sal_uInt8 getAlpha() const { return maPixelUnion.maRGBA.mnA; }

        // data access write

        void setRed(sal_uInt8 nNew) { maPixelUnion.maRGBA.mnR = nNew; }

        void setGreen(sal_uInt8 nNew) { maPixelUnion.maRGBA.mnG = nNew; }

        void setBlue(sal_uInt8 nNew) { maPixelUnion.maRGBA.mnB = nNew; }

        void setAlpha(sal_uInt8 nNew) { maPixelUnion.maRGBA.mnA = nNew; }

        // comparators

        bool operator==( const BPixel& rPixel ) const

        {

            return (rPixel.maPixelUnion.maCombinedRGBA.mnValue == maPixelUnion.maCombinedRGBA.mnValue);

        }

        bool operator!=( const BPixel& rPixel ) const

        {

            return (rPixel.maPixelUnion.maCombinedRGBA.mnValue != maPixelUnion.maCombinedRGBA.mnValue);

        }

    };

} // end of namespace basegfx

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