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+/*
+ * screen_mask.h -- ePiX::screen_mask interface, for screen cropping
+ *
+ * This file is part of ePiX, a C++ library for creating high-quality
+ * figures in LaTeX
+ *
+ * Version 1.1.8
+ * Last Change: July 17, 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_SCREEN_MASK
+#define EPIX_SCREEN_MASK
+
+#include <list>
+#include <string>
+
+#include "edge_data.h"
+
+namespace ePiX {
+
+ class pair;
+
+ class Color;
+
+ class length;
+ class pen_fill;
+ class pen_line;
+
+ class screen_mask {
+ public:
+ virtual ~screen_mask() { }
+
+ virtual screen_mask* clone() const = 0;
+
+ // alignment points
+ pair tr() const;
+ pair tl() const;
+ pair bl() const;
+ pair br() const;
+
+ pair t() const;
+ pair b() const;
+ pair l() const;
+ pair r() const;
+ pair c() const;
+
+ // cropping facilities (for tiles: glyph, pen_line, pen_fill resp.)
+ virtual bool crops(const pair& arg) const = 0; // false if arg visible
+ virtual std::list<edge2d>& crop_path(std::list<edge2d>&) const = 0;
+ virtual std::list<edge2d>& crop_loop(std::list<edge2d>&) const = 0;
+
+ // extreme and average coordinates, dimensions
+ virtual double h_min() const = 0;
+ virtual double h_max() const = 0;
+ virtual double h_size() const = 0;
+ virtual double h_avg() const = 0;
+
+ virtual double v_min() const = 0;
+ virtual double v_max() const = 0;
+ virtual double v_size() const = 0;
+ virtual double v_avg() const = 0;
+
+ // convert us to screen border or backing
+ virtual pen_line border(const Color&, const length&) const = 0;
+ virtual pen_fill backing(const Color&) const = 0;
+
+ virtual pen_line border() const = 0;
+ virtual pen_fill backing() const = 0;
+ }; // end of class screen_mask
+
+} // end of namespace
+
+#endif /* EPIX_SCREEN_MASK */