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authorNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
committerNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
commite0c6872cf40896c7be36b11dcc744620f10adf1d (patch)
tree60335e10d2f4354b0674ec22d7b53f0f8abee672 /graphics/epix/Color_Base.h
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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 <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
+ */
+
+#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 */