pic/common.h

   1 // -*- C++ -*-
   2 /* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
   3      Written by James Clark (jjc@jclark.com)
   4
   5 This file is part of groff.
   6
   7 groff is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 2, or (at your option) any later
  10 version.
  11
  12 groff is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License along
  18 with groff; see the file COPYING.  If not, write to the Free Software
  19 Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
  20
  21 class common_output : public output {
  22 private:
  23   void dash_line(const position &start, const position &end,
  24                  const line_type &lt, double dash_width, double gap_width,
  25                  double *offsetp);
  26   void dash_arc(const position &cent, double rad,
  27                 double start_angle, double end_angle, const line_type &lt,
  28                 double dash_width, double gap_width, double *offsetp);
  29   void dot_line(const position &start, const position &end,
  30                 const line_type &lt, double gap_width, double *offsetp);
  31   void dot_arc(const position &cent, double rad,
  32                double start_angle, double end_angle, const line_type &lt,
  33                double gap_width, double *offsetp);
  34 protected:
  35   virtual void dot(const position &, const line_type &) = 0;
  36   void dashed_circle(const position &, double rad, const line_type &);
  37   void dotted_circle(const position &, double rad, const line_type &);
  38   void dashed_arc(const position &, const position &, const position &,
  39                   const line_type &);
  40   void dotted_arc(const position &, const position &, const position &,
  41                   const line_type &);
  42   virtual void solid_arc(const position &cent, double rad, double start_angle,
  43                          double end_angle, const line_type &lt);
  44   void dashed_rounded_box(const position &, const distance &, double,
  45                           const line_type &);
  46   void dotted_rounded_box(const position &, const distance &, double,
  47                           const line_type &);
  48   void solid_rounded_box(const position &, const distance &, double,
  49                          const line_type &);
  50   void filled_rounded_box(const position &, const distance &, double, double);
  51 public:
  52   void start_picture(double sc, const position &ll, const position &ur) = 0;
  53   void finish_picture() = 0;
  54   void circle(const position &, double rad, const line_type &, double) = 0;
  55   void text(const position &, text_piece *, int, double) = 0;
  56   void line(const position &, const position *, int n, const line_type &) = 0;
  57   void polygon(const position *, int n, const line_type &, double) = 0;
  58   void spline(const position &, const position *, int n,
  59               const line_type &) = 0;
  60   void arc(const position &, const position &, const position &,
  61            const line_type &) = 0;
  62   void ellipse(const position &, const distance &,
  63                const line_type &, double) = 0;
  64   void rounded_box(const position &, const distance &, double,
  65                    const line_type &, double);
  66 };
  67
  68 int compute_arc_center(const position &start, const position &cent,
  69                        const position &end, position *result);
  70