contrib/groff-1.19/src/preproc/pic/common.h

   1 // -*- C++ -*-
   2 /* Copyright (C) 1989, 1990, 1991, 1992, 1993, 2003
   3    Free Software Foundation, Inc.
   4      Written by James Clark (jjc@jclark.com)
   5
   6 This file is part of groff.
   7
   8 groff is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 2, or (at your option) any later
  11 version.
  12
  13 groff is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 You should have received a copy of the GNU General Public License along
  19 with groff; see the file COPYING.  If not, write to the Free Software
  20 Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */
  21
  22 class common_output : public output {
  23 private:
  24   void dash_line(const position &start, const position &end,
  25                  const line_type &lt, double dash_width, double gap_width,
  26                  double *offsetp);
  27   void dash_arc(const position &cent, double rad,
  28                 double start_angle, double end_angle, const line_type &lt,
  29                 double dash_width, double gap_width, double *offsetp);
  30   void dot_line(const position &start, const position &end,
  31                 const line_type &lt, double gap_width, double *offsetp);
  32   void dot_arc(const position &cent, double rad,
  33                double start_angle, double end_angle, const line_type &lt,
  34                double gap_width, double *offsetp);
  35 protected:
  36   virtual void dot(const position &, const line_type &) = 0;
  37   void ellipse_arc(const position &, const position &,
  38                    const position &, const distance &,
  39                    const line_type &);
  40   void dashed_circle(const position &, double rad, const line_type &);
  41   void dotted_circle(const position &, double rad, const line_type &);
  42   void dashed_ellipse(const position &, const distance &, const line_type &);
  43   void dotted_ellipse(const position &, const distance &, const line_type &);
  44   void dashed_arc(const position &, const position &, const position &,
  45                   const line_type &);
  46   void dotted_arc(const position &, const position &, const position &,
  47                   const line_type &);
  48   virtual void solid_arc(const position &cent, double rad, double start_angle,
  49                          double end_angle, const line_type &lt);
  50   void dashed_rounded_box(const position &, const distance &, double,
  51                           const line_type &);
  52   void dotted_rounded_box(const position &, const distance &, double,
  53                           const line_type &);
  54   void solid_rounded_box(const position &, const distance &, double,
  55                          const line_type &);
  56   void filled_rounded_box(const position &, const distance &, double, double);
  57 public:
  58   void start_picture(double sc, const position &ll, const position &ur) = 0;
  59   void finish_picture() = 0;
  60   void circle(const position &, double rad, const line_type &, double) = 0;
  61   void text(const position &, text_piece *, int, double) = 0;
  62   void line(const position &, const position *, int n, const line_type &) = 0;
  63   void polygon(const position *, int n, const line_type &, double) = 0;
  64   void spline(const position &, const position *, int n,
  65               const line_type &) = 0;
  66   void arc(const position &, const position &, const position &,
  67            const line_type &) = 0;
  68   void ellipse(const position &, const distance &,
  69                const line_type &, double) = 0;
  70   void rounded_box(const position &, const distance &, double,
  71                    const line_type &, double);
  72   void set_color(char *, char *) = 0;
  73   void reset_color() = 0;
  74   char *get_last_filled() = 0;
  75   char *get_outline_color() = 0;
  76 };
  77
  78 int compute_arc_center(const position &start, const position &cent,
  79                        const position &end, position *result);
  80