HUV.h

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/*
 *  Copyright (C) 2021 Leonid Kostrykin
 *
 */
 
#ifndef HUV_H_6014714286
#define HUV_H_6014714286
 
#include <Carna/Carna.h>
#include <Carna/base/CarnaException.h>
 
namespace Carna
{
 
namespace base
{
 
 
 
// ----------------------------------------------------------------------------------
// HUV
// ----------------------------------------------------------------------------------
 
struct HUV
{
 
    signed short value;
 
    operator signed short() const;
 
    HUV() = default;
 
    explicit HUV( signed int value, bool absolute=false );
 
    explicit HUV( float intensity, bool absolute=false );
 
    template< typename T >
    static HUV abs( T value );
 
    template< typename T >
    static HUV rel( T value );
 
    float absIntensity() const;
 
    float relIntensity() const;
 
}; // HUV
 
 
inline HUV::operator signed short() const
{
    return value;
}
 
 
inline HUV::HUV( signed int value, bool absolute )
    : value( value )
{
    if( absolute )
    {
        if( this->value < -1024 ) this->value = -1024;
        if( this->value >  3071 ) this->value =  3071;
    }
}
 
 
inline HUV::HUV( float intensity, bool absolute )
{
    const static float huvMax = 3071;
    if( absolute )
    {
        if( intensity < 0 ) intensity = 0;
        if( intensity > 1 ) intensity = 1;
    }
    float huvFloat = intensity * 4095.f + 0.5;
    if( absolute ) huvFloat -= 1024;
    if( huvFloat > huvMax ) huvFloat = huvMax;
    value = static_cast< signed short >( huvFloat );
}
 
 
inline float HUV::absIntensity() const
{
    return ( value + 1024 ) / 4095.f;
}
 
 
inline float HUV::relIntensity() const
{
    return value / 4095.f;
}
 
 
template< typename T >
HUV HUV::abs( T value )
{
    return HUV( value, true );
}
 
 
template< typename T >
HUV HUV::rel( T value )
{
    return HUV( value, false );
}
 
 
 
}  // namespace Carna :: base
 
}  // namespace Carna
 
#endif // HUV_H_6014714286