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/*************************************************************************
** Color.hpp **
** **
** This file is part of dvisvgm -- a fast DVI to SVG converter **
** Copyright (C) 2005-2024 Martin Gieseking <martin.gieseking@uos.de> **
** **
** This program 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. **
** **
** This program 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 this program; if not, see <http://www.gnu.org/licenses/>. **
*************************************************************************/
#ifndef COLOR_HPP
#define COLOR_HPP
#include <cstdint>
#include <string>
#include <valarray>
#include <vector>
#include "VectorIterator.hpp"
#ifdef TRANSPARENT
#undef TRANSPARENT
#endif
class Color {
public:
static bool SUPPRESS_COLOR_NAMES;
static const Color BLACK;
static const Color WHITE;
static const Color TRANSPARENT;
enum class ColorSpace {GRAY, RGB, CMYK, LAB};
public:
Color () noexcept =default;
explicit Color (uint32_t rgb) noexcept : _rgb(rgb) {}
Color (uint8_t r, uint8_t g, uint8_t b) noexcept {setRGB(r,g,b);}
Color (double r, double g, double b) noexcept {setRGB(r,g,b);}
explicit Color (const std::valarray<double> &rgb) noexcept {setRGB(rgb);}
explicit Color (const std::string &name);
explicit operator uint32_t () const {return _rgb;}
bool operator == (const Color &c) const {return _rgb == c._rgb;}
bool operator != (const Color &c) const {return _rgb != c._rgb;}
bool operator < (const Color &c) const {return _rgb < c._rgb;}
Color operator *= (double c);
Color operator * (double c) const {return Color(*this) *= c;}
void setRGB (uint8_t r, uint8_t g, uint8_t b) {_rgb = (r << 16) | (g << 8) | b;}
void setRGB (double r, double g, double b);
void setRGB (const std::valarray<double> &rgb) {setRGB(rgb[0], rgb[1], rgb[2]);}
bool setRGBHexString (std::string hexString);
bool setPSName (std::string name, bool case_sensitive=true);
void setGray (uint8_t g) {setRGB(g,g,g);}
void setGray (double g) {setRGB(g,g,g);}
void setGray (const std::valarray<double> &gray) {setRGB(gray[0], gray[0], gray[0]);}
void setHSB (double h, double s, double b);
void setCMYK (double c, double m, double y, double k);
void setCMYK (const std::valarray<double> &cmyk);
void setXYZ (double x, double y, double z);
void setXYZ (const std::valarray<double> &xyz);
void setLab (double l, double a, double b);
void setLab (const std::valarray<double> &lab);
void set (ColorSpace colorSpace, VectorIterator<double> &it);
double getGray () const;
void getGray (std::valarray<double> &gray) const;
void getRGB (double &r, double &g, double &b) const;
void getRGB (std::valarray<double> &rgb) const;
void getCMYK (double &c, double &m, double &y, double &k) const;
void getCMYK (std::valarray<double> &cmyk) const;
void getXYZ (double &x, double &y, double &z) const;
void getLab (double &l, double &a, double &b) const;
void getLab (std::valarray<double> &lab) const;
double deltaE (const Color &c) const;
std::string rgbString () const;
std::string svgColorString (bool rgbonly) const;
std::string svgColorString () const {return svgColorString(SUPPRESS_COLOR_NAMES);}
static void CMYK2RGB (const std::valarray<double> &cmyk, std::valarray<double> &rgb);
static void RGB2CMYK (const std::valarray<double> &rgb, std::valarray<double> &cmyk);
static void HSB2RGB (const std::valarray<double> &hsb, std::valarray<double> &rgb);
static void RGB2XYZ (std::valarray<double> rgb, std::valarray<double> &xyz);
static void XYZ2RGB (const std::valarray<double> &xyz, std::valarray<double> &rgb);
static void RGB2Lab (const std::valarray<double> &rgb, std::valarray<double> &lab);
static void Lab2XYZ (const std::valarray<double> &lab, std::valarray<double> &xyz);
static int numComponents (ColorSpace colorSpace);
private:
uint32_t _rgb=0;
};
#endif
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