usr/src/usr.bin/groff/pic/common.h

// -*- C++ -*-
/* Copyright (C) 1989, 1990 Free Software Foundation, Inc.
     Written by James Clark (jjc@jclark.uucp)

This file is part of groff.

groff 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 1, or (at your option) any later
version.

groff 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 groff; see the file LICENSE.  If not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */

class common_output : public output {
private:
  void dash_line(const position &start, const position &end,
                 const line_type &lt, double dash_width, double gap_width,
                 double *offsetp);
  void dash_arc(const position &cent, double rad,
                double start_angle, double end_angle, const line_type &lt,
                double dash_width, double gap_width, double *offsetp);
  void dot_line(const position &start, const position &end,
                const line_type &lt, double gap_width, double *offsetp);
  void dot_arc(const position &cent, double rad,
               double start_angle, double end_angle, const line_type &lt,
               double gap_width, double *offsetp);
protected:
  virtual void dot(const position &, const line_type &) = 0;
  void dashed_circle(const position &, double rad, const line_type &);
  void dotted_circle(const position &, double rad, const line_type &);
  void dashed_arc(const position &, const position &, const position &,
                  const line_type &);
  void dotted_arc(const position &, const position &, const position &,
                  const line_type &);
  virtual void solid_arc(const position &cent, double rad, double start_angle,
                         double end_angle, const line_type &lt);
  void dashed_rounded_box(const position &, const distance &, double,
                          const line_type &);
  void dotted_rounded_box(const position &, const distance &, double,
                          const line_type &);
  void solid_rounded_box(const position &, const distance &, double,
                         const line_type &);
  void filled_rounded_box(const position &, const distance &, double, double);
public:
  void start_picture(double sc, const position &ll, const position &ur) = 0;
  void finish_picture() = 0;
  void circle(const position &, double rad, const line_type &, double) = 0;
  void text(const position &, text_piece *, int, double) = 0;
  void line(const position &, const position *, int n, const line_type &) = 0;
  void polygon(const position *, int n, const line_type &, double) = 0;
  void spline(const position &, const position *, int n,
              const line_type &) = 0;
  void arc(const position &, const position &, const position &,
           const line_type &) = 0;
  void ellipse(const position &, const distance &,
               const line_type &, double) = 0;
  void rounded_box(const position &, const distance &, double,
                   const line_type &, double);
};

int compute_arc_center(const position &start, const position &cent,
                       const position &end, position *result);