saturate_cast.h

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/*
* ECVL - European Computer Vision Library
* Version: 0.3.4
* copyright (c) 2021, Università degli Studi di Modena e Reggio Emilia (UNIMORE), AImageLab
* Authors:
*    Costantino Grana (costantino.grana@unimore.it)
*    Federico Bolelli (federico.bolelli@unimore.it)
*    Michele Cancilla (michele.cancilla@unimore.it)
*    Laura Canalini (laura.canalini@unimore.it)
*    Stefano Allegretti (stefano.allegretti@unimore.it)
* All rights reserved.
*/

#ifndef ECVL_SATURATE_CAST_H_
#define ECVL_SATURATE_CAST_H_

#include "datatype.h"

namespace ecvl
{

template<DataType ODT, typename IDT>
typename TypeInfo<ODT>::basetype saturate_cast(IDT v)
{
    using basetype = typename TypeInfo<ODT>::basetype;

    if (v > std::numeric_limits<basetype>::max()) {
        return std::numeric_limits<basetype>::max();
    }
    if (v < std::numeric_limits<basetype>::lowest()) {
        return std::numeric_limits<basetype>::lowest();
    }

    return static_cast<basetype>(v);
}

template<typename ODT, typename IDT>
ODT saturate_cast(const IDT& v)
{
    if (v > std::numeric_limits<ODT>::max()) {
        return std::numeric_limits<ODT>::max();
    }
    if (v < std::numeric_limits<ODT>::lowest()) {
        return std::numeric_limits<ODT>::lowest();
    }

    return static_cast<ODT>(v);
}
} // namespace ecvl
#endif // ECVL_SATURATE_CAST_H_