KoCompositeOpDestinationIn.h

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/*
 *  SPDX-FileCopyrightText: 2016 Wolthera van Hövell tot Westerflier <griffinvalley@gmail.com>
 *  SPDX-FileCopyrightText: 2012 José Luis Vergara <pentalis@gmail.com>
 *
 * SPDX-License-Identifier: LGPL-2.1-or-later
*/
 
#ifndef _KOCOMPOSITEOPDESTINATIONIN_H_
#define _KOCOMPOSITEOPDESTINATIONIN_H_
 
#include "KoCompositeOpBase.h"
 
template<class CS_Traits>
class KoCompositeOpDestinationIn : public KoCompositeOpBase<CS_Traits, KoCompositeOpDestinationIn<CS_Traits> >
{
    typedef KoCompositeOpBase<CS_Traits, KoCompositeOpDestinationIn<CS_Traits> > base_class;
    typedef typename CS_Traits::channels_type channels_type;
 
    static const qint8 channels_nb = CS_Traits::channels_nb;
    static const qint8 alpha_pos   = CS_Traits::alpha_pos;
 
public:
    KoCompositeOpDestinationIn(const KoColorSpace * cs)
        : base_class(cs, COMPOSITE_DESTINATION_IN, KoCompositeOp::categoryMix()) { }
 
public:
    template<bool alphaLocked, bool allChannelFlags>
    inline static channels_type composeColorChannels(const channels_type* src, channels_type srcAlpha,
                                                     channels_type*       dst, channels_type dstAlpha,
                                                     channels_type  maskAlpha, channels_type  opacity,
                                                     const QBitArray& channelFlags                    )  {
        using namespace Arithmetic;
        Q_UNUSED(src);
        Q_UNUSED(dst);
        Q_UNUSED(channelFlags);
 
        channels_type appliedAlpha       = mul(maskAlpha, srcAlpha, opacity);
 
        channels_type newDstAlpha        = mul(dstAlpha, appliedAlpha);
 
        return newDstAlpha;
    }
};
 
#endif  // _KOCOMPOSITEOPDESTINATIONIN_H_