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/*
* Color_Base.h -- ePiX::Color interface
*
* This file is part of ePiX, a C++ library for creating high-quality
* figures in LaTeX
*
* Version 1.1.17
* Last Change: September 13, 2007
*
*
* Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007
* Andrew D. Hwang <ahwang -at- holycross -dot- edu>
* Department of Mathematics and Computer Science
* College of the Holy Cross
* Worcester, MA, 01610-2395, USA
*
*
* ePiX 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 2 of the License, or
* (at your option) any later version.
*
* ePiX 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 ePiX; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef EPIX_COLOR_BASE
#define EPIX_COLOR_BASE
#include <string>
#include <vector>
namespace ePiX {
class Color_Base {
protected:
struct RGB_Densities
{
// ensures densities are in [0,1]
RGB_Densities (double r, double g, double b);
double m_dens_red, m_dens_green, m_dens_blue;
};
public:
virtual ~Color_Base() { }
virtual Color_Base* clone() const = 0;
// blending (all non-const)
// apply us as filter
virtual Color_Base& filter(const Color_Base&) = 0;
// scale intensities
virtual Color_Base& operator*= (double) = 0;
// clip d to [0,1], then return (1-d)*this + d*col
virtual Color_Base& blend(const Color_Base&, double) = 0;
// add channels
virtual Color_Base& superpose(const Color_Base&) = 0;
// return negative color
virtual Color_Base& invert() = 0;
// internal colorname and densities
virtual std::string model() const = 0;
virtual std::string name() const = 0;
virtual std::vector<double> densities() const = 0;
bool operator== (const Color_Base& col) const;
virtual RGB_Densities to_rgb() const = 0;
}; // end of class Color_Base
} // end of namespace
#endif /* EPIX_COLOR_BASE */
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