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/*************************************************************************
** Color.h **
** **
** This file is part of dvisvgm -- the DVI to SVG converter **
** Copyright (C) 2005-2014 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 DVISVGM_COLOR_H
#define DVISVGM_COLOR_H
#include <string>
#include <valarray>
#include <vector>
#include "types.h"
#include "VectorIterator.h"
#ifdef TRANSPARENT
#undef TRANSPARENT
#endif
class Color
{
public:
static const Color BLACK;
static const Color WHITE;
static const Color TRANSPARENT;
enum ColorSpace {GRAY_SPACE, RGB_SPACE, CMYK_SPACE, LAB_SPACE};
public:
Color () : _rgb(0) {}
Color (UInt32 rgb) : _rgb(rgb) {}
Color (UInt8 r, UInt8 g, UInt8 b) {setRGB(r,g,b);}
Color (double r, double g, double b) {setRGB(r,g,b);}
Color (const std::valarray<double> &rgb) {setRGB(rgb);}
Color (const char *name);
Color (const std::string &name);
// Color (ColorSpace colorSpace, std::vector<double>::const_iterator &it) {set(colorSpace, it);}
operator UInt32 () const {return _rgb;}
bool operator == (const Color &c) const {return _rgb == c._rgb;}
bool operator != (const Color &c) const {return _rgb != c._rgb;}
void setRGB (UInt8 r, UInt8 g, UInt8 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 setName (std::string name, bool case_sensitive=true);
void setGray (UInt8 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;
void operator *= (double c);
double deltaE (const Color &c) const;
std::string rgbString () const;
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 _rgb;
};
#endif
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