src/pre-pic/output.h

   1 /*@
   2  * Copyright (c) 2014 - 2015 Steffen (Daode) Nurpmeso <sdaoden@users.sf.net>.
   3  *
   4  * Copyright (C) 1989 - 1992, 2001, 2007
   5  *      Free Software Foundation, Inc.
   6  *      Written by James Clark (jjc@jclark.com)
   7  *
   8  * This 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  * This 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 #ifndef _OUTPUT_H
  23 #define _OUTPUT_H
  24
  25 #include "config.h"
  26 #include "pic-config.h"
  27
  28 class line_type
  29 {
  30 public:
  31   enum { invisible, solid, dotted, dashed } type;
  32   double dash_width;
  33   double thickness;             // the thickness is in points
  34
  35   line_type();
  36 };
  37
  38 class output
  39 {
  40 protected:
  41   char *args;
  42   double desired_height;        // zero if no height specified
  43   double desired_width;         // zero if no depth specified
  44   double compute_scale(double, const position &, const position &);
  45
  46 public:
  47   output();
  48   virtual ~output();
  49   void set_desired_width_height(double wid, double ht);
  50   void set_args(const char *);
  51   virtual void start_picture(double sc, const position &ll, const position &ur) = 0;
  52   virtual void finish_picture() = 0;
  53   virtual void circle(const position &, double rad,
  54                       const line_type &, double) = 0;
  55   virtual void text(const position &, text_piece *, int, double) = 0;
  56   virtual void line(const position &, const position *, int n,
  57                     const line_type &) = 0;
  58   virtual void polygon(const position *, int n,
  59                        const line_type &, double) = 0;
  60   virtual void spline(const position &, const position *, int n,
  61                       const line_type &) = 0;
  62   virtual void arc(const position &, const position &, const position &,
  63                    const line_type &) = 0;
  64   virtual void ellipse(const position &, const distance &,
  65                        const line_type &, double) = 0;
  66   virtual void rounded_box(const position &, const distance &, double,
  67                            const line_type &, double, char *) = 0;
  68   virtual void command(const char *, const char *, int) = 0;
  69   virtual void set_location(const char *, int) {}
  70   virtual void set_color(char *, char *) = 0;
  71   virtual void reset_color() = 0;
  72   virtual char *get_last_filled() = 0;
  73   virtual char *get_outline_color() = 0;
  74   virtual int supports_filled_polygons();
  75   virtual void begin_block(const position &ll, const position &ur);
  76   virtual void end_block();
  77 };
  78
  79 extern output *out;
  80
  81 output *make_troff_output();
  82
  83 #ifdef TEX_SUPPORT
  84 output *make_tex_output();
  85 output *make_tpic_output();
  86 #endif
  87
  88 #ifdef FIG_SUPPORT
  89 output *make_fig_output();
  90 #endif
  91
  92 #endif // _OUTPUT_H
  93 // s-it2-mode