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author | Norbert Preining <norbert@preining.info> | 2019-09-02 13:46:59 +0900 |
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committer | Norbert Preining <norbert@preining.info> | 2019-09-02 13:46:59 +0900 |
commit | e0c6872cf40896c7be36b11dcc744620f10adf1d (patch) | |
tree | 60335e10d2f4354b0674ec22d7b53f0f8abee672 /graphics/epix/Color.h |
Initial commit
Diffstat (limited to 'graphics/epix/Color.h')
-rw-r--r-- | graphics/epix/Color.h | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/graphics/epix/Color.h b/graphics/epix/Color.h new file mode 100644 index 0000000000..fc2db6127e --- /dev/null +++ b/graphics/epix/Color.h @@ -0,0 +1,156 @@ +/* + * Color.h -- ePiX::Color class and helpers + * + * 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 <rot 13 nujnat at zngupf dot ubylpebff dot rqh> + * 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., + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +/* + * This file defines the ePiX Color user interface: + * operator*= Modify intensity + * blend(Color, double) Color mixing + * filter(Color) Apply us as a filter + * superpose(Color) Add colors, clip intensities + * invert() Color negative + * + * - Named primary constructors + * + * Scaling and filtering are implemented by converting to the filter's + * color model. Color model conversions come from the LaTeX xcolor + * package documentation, V 1.11 (2044/05/09) by Uwe Kern. + */ + +#ifndef EPIX_COLOR +#define EPIX_COLOR + +#include <string> +#include <vector> + +namespace ePiX { + + class Color_Base; + + class Color { + public: + Color(); + Color(const Color_Base*); + Color(const Color_Base&); + Color(const Color&); + + Color& operator= (const Color&); + + ~Color(); + + const Color_Base* operator->() const; + double alpha() const; + + bool operator== (const Color&) const; + bool operator< (const Color&) const; // needed for Screen::pallet + bool operator!= (const Color& col) const { return !((*this) == col); } + bool is_unset() const; + + Color filter(const Color&) const; + + Color& operator*= (double c); // scale the intensity + Color& blend(const Color&, double); + Color& superpose(const Color&); + Color& invert(); + Color& alpha(double); + + std::string model() const; + std::string name() const; + std::vector<double> densities() const; + + private: + Color_Base* m_color; + double m_alpha; + + }; // end of class Color + + Color operator* (double, const Color&); + + + /* + * * * Primary color functions in the global namespace * * * + * + * A primary color constructor accepts a numerical argument, which is + * reduced mod 4, then interpreted as a color density as follows: + * d = -2 or 2 : white + * d = -1: full anti-saturation + * d = 0: black + * d = 1: full saturation (default) + * + * The primary changes continuously, and linearly on each interval + * [-2,-1], [-1,0], [0,1], and [1,2]. + * + * Example: + * Red(0.3) = rgb(0.3, 0, 0) = Red(-3.7) + * Red(1.3) = rgb(1,0.3,0.3) = Red(-2.7) + * Red(2.3) = rgb(0.7, 1, 1) = Red(-1.7) + * Red(3.3) = rgb(0,0.7,0.7) = Red(-0.7) + */ + Color RGB(double r=0, double g=0, double b=0); + Color CMY(double c=1, double m=1, double y=1); + Color CMYK(double c=1, double m=1, double y=1, + double k=0); // void same as CMYK(0,0,0,1); + Color Gray(double d=0); + + Color Red(double d=1); + Color Green(double d=1); + Color Blue(double d=1); + Color White(double d=1); + Color Black(double d=1); + + Color Cyan(double d=1); + Color Magenta(double d=1); + Color Yellow(double d=1); + Color CMY_White(double d=1); + Color CMY_Black(double d=1); + + Color CyanK(double d=1); + Color MagentaK(double d=1); + Color YellowK(double d=1); + Color CMYK_White(double d=1); + Color CMYK_Black(double d=1); + + // color separation + Color C_Process(double d=1); + Color M_Process(double d=1); + Color Y_Process(double d=1); + Color K_Process(double d=1); + + // "conversion filters" + Color Neutral(); + Color RGB_Neutral(); + Color CMY_Neutral(); + Color CMYK_Neutral(); + Color Gray_Neutral(); + +} // end of namespace + +#endif /* EPIX_COLOR */ |