Line data    Source code

       1             : /* Copyright 1989-2020 Free Software Foundation, Inc.
       2             :      Written by James Clark (jjc@jclark.com)
       3             : 
       4             : This file is part of groff, the GNU roff typesetting system.
       5             : 
       6             : groff is free software; you can redistribute it and/or modify it under
       7             : the terms of the GNU General Public License as published by the Free
       8             : Software Foundation, either version 3 of the License, or
       9             : (at your option) any later version.
      10             : 
      11             : groff is distributed in the hope that it will be useful, but WITHOUT ANY
      12             : WARRANTY; without even the implied warranty of MERCHANTABILITY or
      13             : FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      14             : for more details.
      15             : 
      16             : You should have received a copy of the GNU General Public License
      17             : along with this program.  If not, see <http://www.gnu.org/licenses/>. */
      18             : 
      19             : struct line_type {
      20             :   enum { invisible, solid, dotted, dashed } type;
      21             :   double dash_width;
      22             :   double thickness;             // the thickness is in points
      23             : 
      24             :   line_type();
      25             : };
      26             : 
      27             : 
      28             : class output {
      29             : protected:
      30             :   char *args;
      31             :   double desired_height;        // zero if no height specified
      32             :   double desired_width;         // zero if no depth specified
      33             :   double compute_scale(double, const position &, const position &);
      34             : public:
      35             :   output();
      36             :   virtual ~output();
      37             :   void set_desired_width_height(double wid, double ht);
      38             :   void set_args(const char *);
      39             :   virtual void start_picture(double sc, const position &ll, const position &ur) = 0;
      40             :   virtual void finish_picture() = 0;
      41             :   virtual void circle(const position &, double rad,
      42             :                       const line_type &, double) = 0;
      43             :   virtual void text(const position &, text_piece *, int, double) = 0;
      44             :   virtual void line(const position &, const position *, int n,
      45             :                     const line_type &) = 0;
      46             :   virtual void polygon(const position *, int n,
      47             :                        const line_type &, double) = 0;
      48             :   virtual void spline(const position &, const position *, int n,
      49             :                       const line_type &) = 0;
      50             :   virtual void arc(const position &, const position &, const position &,
      51             :                    const line_type &) = 0;
      52             :   virtual void ellipse(const position &, const distance &,
      53             :                        const line_type &, double) = 0;
      54             :   virtual void rounded_box(const position &, const distance &, double,
      55             :                            const line_type &, double, char *) = 0;
      56             :   virtual void command(const char *, const char *, int) = 0;
      57           0 :   virtual void set_location(const char *, int) {}
      58             :   virtual void set_color(char *, char *) = 0;
      59             :   virtual void reset_color() = 0;
      60             :   virtual char *get_last_filled() = 0;
      61             :   virtual char *get_outline_color() = 0;
      62             :   virtual int supports_filled_polygons();
      63             :   virtual void begin_block(const position &ll, const position &ur);
      64             :   virtual void end_block();
      65             : };
      66             : 
      67             : extern output *out;
      68             : 
      69             : /* #define FIG_SUPPORT 1 */
      70             : #define TEX_SUPPORT 1
      71             : 
      72             : output *make_troff_output();
      73             : 
      74             : #ifdef TEX_SUPPORT
      75             : output *make_tex_output();
      76             : output *make_tpic_output();
      77             : #endif /* TEX_SUPPORT */
      78             : 
      79             : #ifdef FIG_SUPPORT
      80             : output *make_fig_output();
      81             : #endif /* FIG_SUPPORT */
      82             : 
      83             : // Local Variables:
      84             : // fill-column: 72
      85             : // mode: C++
      86             : // End:
      87             : // vim: set cindent noexpandtab shiftwidth=2 textwidth=72: