HUV.hpp

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/*
 *  Copyright (C) 2010 - 2016 Leonid Kostrykin
 *
 *  Chair of Medical Engineering (mediTEC)
 *  RWTH Aachen University
 *  Pauwelsstr. 20
 *  52074 Aachen
 *  Germany
 * 
 * 
 *  Copyright (C) 2021 - 2025 Leonid Kostrykin
 * 
 */
 
#ifndef HUV_H_6014714286
#define HUV_H_6014714286
 
#include <cmath>
#include <LibCarna/LibCarna.hpp>
#include <LibCarna/base/LibCarnaException.hpp>
 
namespace LibCarna
{
 
namespace base
{
 
 
 
// ----------------------------------------------------------------------------------
// HUV
// ----------------------------------------------------------------------------------
 
struct HUV
{
 
    signed short value;
 
    operator signed short() const;
 
    HUV() = default;
 
    explicit HUV( signed int value );
 
    explicit HUV( float intensity );
 
    float intensity() const;
 
}; // HUV
 
 
inline HUV::operator signed short() const
{
    return value;
}
 
 
inline HUV::HUV( signed int value )
    : value( value )
{
    if( this->value < -1024 ) this->value = -1024;
    if( this->value >  3071 ) this->value =  3071;
}
 
 
inline HUV::HUV( float intensity )
{
    const static float huvMax = 3071;
    if( intensity < 0 ) intensity = 0;
    if( intensity > 1 ) intensity = 1;
    const float huvFloat = intensity * 4095.f - 1024;
    value = static_cast< signed short >( std::lround( huvFloat ) );
}
 
 
inline float HUV::intensity() const
{
    return ( value + 1024 ) / 4095.f;
}
 
 
 
// ----------------------------------------------------------------------------------
// HUVOffset
// ----------------------------------------------------------------------------------
 
struct HUVOffset
{
 
    signed short value;
 
    operator signed short() const;
 
    HUVOffset() = default;
 
    explicit HUVOffset( signed int value );
 
    explicit HUVOffset( float intensity );
 
    float intensity() const;
 
}; // HUVOffset
 
 
inline float HUVOffset::intensity() const
{
    return value / 4095.f;
}
 
 
inline HUVOffset::HUVOffset( signed int value )
    : value( value )
{
    if( this->value < -4095 ) this->value = -4095;
    if( this->value > +4095 ) this->value = +4095;
}
 
 
inline HUVOffset::HUVOffset( float intensity )
{
    if( intensity < -1 ) intensity = -1;
    if( intensity > +1 ) intensity = +1;
    const float huvFloat = intensity * 4095.f;
    value = static_cast< signed short >( std::lround( huvFloat ) );
}
 
 
 
}  // namespace LibCarna :: base
 
}  // namespace LibCarna
 
#endif // HUV_H_6014714286