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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* HSLuv-C: Human-friendly HSL
*
* Authors:
* 2015 Alexei Boronine (original idea, JavaScript implementation)
* 2015 Roger Tallada (Obj-C implementation)
* 2017 Martin Mitas (C implementation, based on Obj-C implementation)
* 2021 Massinissa Derriche (C++ implementation for Inkscape, based on C implementation)
*
* Copyright (C) 2021 Authors
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#ifndef SEEN_HSLUV_H
#define SEEN_HSLUV_H
#include <array>
namespace Hsluv {
// Types
using Triplet = std::array<double, 3>;
class Line {
public:
Line ();
Line (double slope, double intercept);
Line (const Line& other);
void operator=(const Line& other);
double slope;
double intercept;
};
// Functions
/**
* Return the bounds of the Luv colors in RGB gamut.
*
* @param l Lightness. Between 0.0 and 100.0.
* @return Bounds of Luv colors in RGB gamut.
*/
std::array<Line, 6> getBounds(double l);
/**
* Convert Luv to RGB.
*
* @param l Luminance. Between 0.0 and 100.0.
* @param u U coordinate.
* @param v V coordinate.
* @param[out] pr Red. Between 0.0 and 1.0.
* @param[out] pg Green. Between 0.0 and 1.0.
* @param[out] pb Blue. Between 0.0 and 1.0.
*/
void luv_to_rgb(double l, double u, double v, double *pr, double *pg, double *pb);
/**
* Convert HSLuv to Luv.
*
* @param h Hue. Between 0.0 and 360.0.
* @param s Saturation. Between 0.0 and 100.0.
* @param l Lightness. Between 0.0 and 100.0.
* @param[out] pl Luminance. Between 0.0 and 100.0.
* @param[out] pu U coordinate.
* @param[out] pv V coordinate.
*/
void hsluv_to_luv(double h, double s, double l, double *pl, double *pu, double *pv);
/**
* Convert Luv to HSLuv.
*
* @param l Luminance. Between 0.0 and 100.0.
* @param u U coordinate.
* @param v V coordinate.
* @param[out] ph Hue. Between 0.0 and 360.0.
* @param[out] ps Saturation. Between 0.0 and 100.0.
* @param[out] pl Lightness. Between 0.0 and 100.0.
*/
void luv_to_hsluv(double l, double u, double v, double *ph, double *ps, double *pl);
/**
* Convert RGB to HSLuv.
*
* @param r Red. Between 0.0 and 1.0.
* @param g Green. Between 0.0 and 1.0.
* @param b Blue. Between 0.0 and 1.0.
* @param[out] ph Hue. Between 0.0 and 360.0.
* @param[out] ps Saturation. Between 0.0 and 100.0.
* @param[out] pl Lightness. Between 0.0 and 100.0.
*/
void rgb_to_hsluv(double r, double g, double b, double *ph, double *ps, double *pl);
/**
* Convert HSLuv to RGB.
*
* @param h Hue. Between 0.0 and 360.0.
* @param s Saturation. Between 0.0 and 100.0.
* @param l Lightness. Between 0.0 and 100.0.
* @param[out] pr Red. Between 0.0 and 1.0.
* @param[out] pg Green. Between 0.0 and 1.0.
* @param[out] pb Blue. Between 0.0 and 1.0.
*/
void hsluv_to_rgb(double h, double s, double l, double *pr, double *pg, double *pb);
} // namespace Hsluv
#endif // SEEN_HSLUV_H
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