src/preproc/pic/output.h

   1 // -*- C++ -*-
   2 /* Copyright (C) 1989, 1990, 1991, 1992, 2001 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, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */
  20
  21 struct line_type {
  22   enum { invisible, solid, dotted, dashed } type;
  23   double dash_width;
  24   double thickness;             // the thickness is in points
  25
  26   line_type();
  27 };
  28
  29
  30 class output {
  31 protected:
  32   char *args;
  33   double desired_height;        // zero if no height specified
  34   double desired_width;         // zero if no depth specified
  35   double compute_scale(double, const position &, const position &);
  36 public:
  37   output();
  38   virtual ~output();
  39   void set_desired_width_height(double wid, double ht);
  40   void set_args(const char *);
  41   virtual void start_picture(double sc, const position &ll, const position &ur) = 0;
  42   virtual void finish_picture() = 0;
  43   virtual void circle(const position &, double rad,
  44                       const line_type &, double) = 0;
  45   virtual void text(const position &, text_piece *, int, double) = 0;
  46   virtual void line(const position &, const position *, int n,
  47                     const line_type &) = 0;
  48   virtual void polygon(const position *, int n,
  49                        const line_type &, double) = 0;
  50   virtual void spline(const position &, const position *, int n,
  51                       const line_type &) = 0;
  52   virtual void arc(const position &, const position &, const position &,
  53                    const line_type &) = 0;
  54   virtual void ellipse(const position &, const distance &,
  55                        const line_type &, double) = 0;
  56   virtual void rounded_box(const position &, const distance &, double,
  57                            const line_type &, double) = 0;
  58   virtual void command(const char *, const char *, int) = 0;
  59   virtual void set_location(const char *, int) {}
  60   virtual void set_color(char *, char *) = 0;
  61   virtual void reset_color() = 0;
  62   virtual char *get_last_filled() = 0;
  63   virtual char *get_outline_color() = 0;
  64   virtual int supports_filled_polygons();
  65   virtual void begin_block(const position &ll, const position &ur);
  66   virtual void end_block();
  67 };
  68
  69 extern output *out;
  70
  71 /* #define FIG_SUPPORT 1 */
  72 #define TEX_SUPPORT 1
  73
  74 output *make_troff_output();
  75
  76 #ifdef TEX_SUPPORT
  77 output *make_tex_output();
  78 output *make_tpic_output();
  79 #endif /* TEX_SUPPORT */
  80
  81 #ifdef FIG_SUPPORT
  82 output *make_fig_output();
  83 #endif /* FIG_SUPPORT */