/*-------------------------------------------------------------------------
NeoGamma class is used to correct RGB colors for human eye gamma levels equally
across all color channels

Written by Michael C. Miller.

I invest time and resources providing this open source code,
please support me by dontating (see https://github.com/Makuna/NeoPixelBus)

-------------------------------------------------------------------------
This file is part of the Makuna/NeoPixelBus library.

NeoPixelBus is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation, either version 3 of
the License, or (at your option) any later version.

NeoPixelBus is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with NeoPixel.  If not, see
<http://www.gnu.org/licenses/>.
-------------------------------------------------------------------------*/
#pragma once

// NeoGammaEquationMethod uses no memory but is slower than NeoGammaTableMethod
class NeoGammaEquationMethod
{
public:
    static uint8_t Correct(uint8_t value)
    {
        return static_cast<uint8_t>(255.0f * NeoEase::Gamma(value / 255.0f) + 0.5f);
    }
};

// NeoGammaTableMethod uses 256 bytes of memory, but is significantly faster
class NeoGammaTableMethod
{
public:
    static uint8_t Correct(uint8_t value)
    {
        return _table[value];
    }

private:
    static const uint8_t _table[256];
};


// use one of the method classes above as a converter for this template class
template<typename T_METHOD> class NeoGamma
{
public:
    RgbColor Correct(const RgbColor& original)
    {
        return RgbColor(T_METHOD::Correct(original.R),
            T_METHOD::Correct(original.G),
            T_METHOD::Correct(original.B));
    }

    RgbwColor Correct(const RgbwColor& original)
    {
        return RgbwColor(T_METHOD::Correct(original.R),
            T_METHOD::Correct(original.G),
            T_METHOD::Correct(original.B),
            T_METHOD::Correct(original.W) );
    }
};