summaryrefslogtreecommitdiff
path: root/graphics/epix/Color.h
diff options
context:
space:
mode:
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.h
Initial commit
Diffstat (limited to 'graphics/epix/Color.h')
-rw-r--r--graphics/epix/Color.h156
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 */