💿🐜 Antkeeper source code
https://antkeeper.com
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
99 lines
2.7 KiB
99 lines
2.7 KiB
/*
|
|
* Copyright (C) 2021 Christopher J. Howard
|
|
*
|
|
* This file is part of Antkeeper source code.
|
|
*
|
|
* Antkeeper source code is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* Antkeeper source code 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef ANTKEEPER_COLOR_ACESCG_HPP
|
|
#define ANTKEEPER_COLOR_ACESCG_HPP
|
|
|
|
#include "math/math.hpp"
|
|
|
|
namespace color {
|
|
|
|
/// Functions which operate in the ACEScg colorspace.
|
|
namespace acescg {
|
|
|
|
/// CIE chromaticity coordinates of the ACEScg white point (~D60).
|
|
template <class T>
|
|
constexpr math::vector2<T> whitepoint = {0.32168, 0.33767};
|
|
|
|
/**
|
|
* Calculates the luminance of an ACEScg color.
|
|
*
|
|
* @param x ACEScg color.
|
|
* @return return Luminance of @p x.
|
|
*/
|
|
template <class T>
|
|
T luminance(const math::vector3<T>& x);
|
|
|
|
/**
|
|
* Transforms an ACEScg color into the linear sRGB colorspace using the Bradford chromatic adaption transform.
|
|
*
|
|
* @param x ACEScg color.
|
|
* @return return Linear sRGB color.
|
|
*
|
|
* @see https://www.colour-science.org/apps/
|
|
*/
|
|
template <class T>
|
|
math::vector3<T> to_srgb(const math::vector3<T>& x);
|
|
|
|
/**
|
|
* Transforms an ACEScg color into the CIE XYZ colorspace.
|
|
*
|
|
* @param x ACEScg color.
|
|
* @return return CIE XYZ color.
|
|
*/
|
|
template <class T>
|
|
math::vector3<T> to_xyz(const math::vector3<T>& x);
|
|
|
|
template <class T>
|
|
T luminance(const math::vector3<T>& x)
|
|
{
|
|
static const math::vector3<T> luma = {0.272228716780914, 0.674081765811148, 0.053689517407937};
|
|
return math::dot(x, luma);
|
|
}
|
|
|
|
template <class T>
|
|
math::vector3<T> to_srgb(const math::vector3<T>& x)
|
|
{
|
|
static const math::matrix3<T> acescg_to_srgb
|
|
{{
|
|
{ 1.704858676289160, -0.130076824208823, -0.023964072927574},
|
|
{-0.621716021885330, 1.140735774822504, -0.128975508299318},
|
|
{-0.083299371729058, -0.010559801677511, 1.153014018916862}
|
|
}};
|
|
|
|
return acescg_to_srgb * x;
|
|
}
|
|
|
|
template <class T>
|
|
math::vector3<T> to_xyz(const math::vector3<T>& x)
|
|
{
|
|
static const math::matrix3<T> acescg_to_xyz
|
|
{{
|
|
{0.662454181108505, 0.272228716780914, -0.005574649490394},
|
|
{0.134004206456433, 0.674081765811148, 0.004060733528983},
|
|
{0.156187687004908, 0.053689517407937, 1.010339100312997}
|
|
}};
|
|
|
|
return acescg_to_xyz * x;
|
|
}
|
|
|
|
} // namespace acescg
|
|
} // namespace color
|
|
|
|
#endif // ANTKEEPER_COLOR_ACESCG_HPP
|