gnu/dist/groff/src/preproc/pic/output.h

   1 /*      $NetBSD$        */
   2
   3 // -*- C++ -*-
   4 /* Copyright (C) 1989, 1990, 1991, 1992, 2001 Free Software Foundation, Inc.
   5      Written by James Clark (jjc@jclark.com)
   6
   7 This file is part of groff.
   8
   9 groff is free software; you can redistribute it and/or modify it under
  10 the terms of the GNU General Public License as published by the Free
  11 Software Foundation; either version 2, or (at your option) any later
  12 version.
  13
  14 groff is distributed in the hope that it will be useful, but WITHOUT ANY
  15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  17 for more details.
  18
  19 You should have received a copy of the GNU General Public License along
  20 with groff; see the file COPYING.  If not, write to the Free Software
  21 Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */
  22
  23 struct line_type {
  24   enum { invisible, solid, dotted, dashed } type;
  25   double dash_width;
  26   double thickness;             // the thickness is in points
  27
  28   line_type();
  29 };
  30
  31
  32 class output {
  33 protected:
  34   char *args;
  35   double desired_height;        // zero if no height specified
  36   double desired_width;         // zero if no depth specified
  37   double compute_scale(double, const position &, const position &);
  38 public:
  39   output();
  40   virtual ~output();
  41   void set_desired_width_height(double wid, double ht);
  42   void set_args(const char *);
  43   virtual void start_picture(double sc, const position &ll, const position &ur) = 0;
  44   virtual void finish_picture() = 0;
  45   virtual void circle(const position &, double rad,
  46                       const line_type &, double) = 0;
  47   virtual void text(const position &, text_piece *, int, double) = 0;
  48   virtual void line(const position &, const position *, int n,
  49                     const line_type &) = 0;
  50   virtual void polygon(const position *, int n,
  51                        const line_type &, double) = 0;
  52   virtual void spline(const position &, const position *, int n,
  53                       const line_type &) = 0;
  54   virtual void arc(const position &, const position &, const position &,
  55                    const line_type &) = 0;
  56   virtual void ellipse(const position &, const distance &,
  57                        const line_type &, double) = 0;
  58   virtual void rounded_box(const position &, const distance &, double,
  59                            const line_type &, double) = 0;
  60   virtual void command(const char *, const char *, int) = 0;
  61   virtual void set_location(const char *, int) {}
  62   virtual void set_color(char *, char *) = 0;
  63   virtual void reset_color() = 0;
  64   virtual char *get_last_filled() = 0;
  65   virtual char *get_outline_color() = 0;
  66   virtual int supports_filled_polygons();
  67   virtual void begin_block(const position &ll, const position &ur);
  68   virtual void end_block();
  69 };
  70
  71 extern output *out;
  72
  73 /* #define FIG_SUPPORT 1 */
  74 #define TEX_SUPPORT 1
  75
  76 output *make_troff_output();
  77
  78 #ifdef TEX_SUPPORT
  79 output *make_tex_output();
  80 output *make_tpic_output();
  81 #endif /* TEX_SUPPORT */
  82
  83 #ifdef FIG_SUPPORT
  84 output *make_fig_output();
  85 #endif /* FIG_SUPPORT */