KoCompositeOpGenericFunctorBase.h

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/*
 *  SPDX-FileCopyrightText: 2024 Dmitry Kazakov <dimula73@gmail.com>
 *
 *  SPDX-License-Identifier: GPL-2.0-or-later
 */
#ifndef KOCOMPOSITEOPGENERICFUNCTORBASE_H
#define KOCOMPOSITEOPGENERICFUNCTORBASE_H
 
#include <KoColorSpaceMaths.h>
 
// no clamping at all
template <typename T>
struct KoCompositeOpGenericFunctorBase
{
    static inline T clampSourceChannelValue(T value) {
        return value;
    }
 
    static inline T clampDestinationChannelValue(T value) {
        return value;
    }
};
 
// clamp source channel to SDR, keep destination channel unbounded
template <typename T>
struct KoClampedSourceCompositeOpGenericFunctorBase
{
    static inline T clampSourceChannelValue(T value) {
        using namespace Arithmetic;
        return clampChannelToSDR(value);
    }
 
    static inline T clampDestinationChannelValue(T value) {
        return value;
    }
};
 
// make sure source and destination channels are non-negative
template <typename T>
struct KoClampedSourceAndDestinationBottomCompositeOpGenericFunctorBase
{
    static inline T clampSourceChannelValue(T value) {
        using namespace Arithmetic;
        return clampChannelToSDRBottom(value);
    }
 
    static inline T clampDestinationChannelValue(T value) {
        using namespace Arithmetic;
        return clampChannelToSDRBottom(value);
    }
};
 
// clamp both source and destination channels to SDR range
template <typename T>
struct KoClampedSourceAndDestinationCompositeOpGenericFunctorBase
{
    static inline T clampSourceChannelValue(T value) {
        using namespace Arithmetic;
        return clampChannelToSDR(value);
    }
 
    static inline T clampDestinationChannelValue(T value) {
        using namespace Arithmetic;
        return clampChannelToSDR(value);
    }
};
 
// clamp source on the both sides and clamp destination on
// the negative side only
template <typename T>
struct KoClampedSourceFullAndDestinationBottomCompositeOpGenericFunctorBase
{
    static inline T clampSourceChannelValue(T value) {
        using namespace Arithmetic;
        return clampChannelToSDR(value);
    }
 
    static inline T clampDestinationChannelValue(T value) {
        using namespace Arithmetic;
        return clampChannelToSDRBottom(value);
    }
};
 
#endif // KOCOMPOSITEOPGENERICFUNCTORBASE_H