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      1 /*	$NetBSD: printer.h,v 1.1.1.1 2016/01/13 18:41:48 christos Exp $	*/
      2 
      3 // -*- C++ -*-
      4 
      5 // <groff_src_dir>/src/include/printer.h
      6 
      7 /* Copyright (C) 1989, 1990, 1991, 1992, 2001, 2002, 2003, 2004
      8    Free Software Foundation, Inc.
      9 
     10    Written by James Clark (jjc (at) jclark.com)
     11 
     12    Last update: 15 Dec 2004
     13 
     14    This file is part of groff.
     15 
     16    groff is free software; you can redistribute it and/or modify it
     17    under the terms of the GNU General Public License as published by
     18    the Free Software Foundation; either version 2, or (at your option)
     19    any later version.
     20 
     21    groff is distributed in the hope that it will be useful, but
     22    WITHOUT ANY WARRANTY; without even the implied warranty of
     23    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     24    General Public License for more details.
     25 
     26    You should have received a copy of the GNU General Public License
     27    along with groff; see the file COPYING.  If not, write to the Free
     28    Software Foundation, 51 Franklin St - Fifth Floor, Boston, MA
     29    02110-1301, USA.
     30 */
     31 
     32 /* Description
     33 
     34    The class `printer' performs the postprocessing.  Each
     35    postprocessor only needs to implement a derived class of `printer' and
     36    a suitable function `make_printer' for the device-dependent tasks.
     37    Then the methods of class `printer' are called automatically by
     38    `do_file()' in `input.cpp'.
     39 */
     40 
     41 #include "color.h"
     42 
     43 struct environment {
     44   int fontno;
     45   int size;
     46   int hpos;
     47   int vpos;
     48   int height;
     49   int slant;
     50   color *col;
     51   color *fill;
     52 };
     53 
     54 class font;
     55 
     56 struct font_pointer_list {
     57   font *p;
     58   font_pointer_list *next;
     59 
     60   font_pointer_list(font *, font_pointer_list *);
     61 };
     62 
     63 class printer {
     64 public:
     65   printer();
     66   virtual ~printer();
     67   void load_font(int i, const char *name);
     68   void set_ascii_char(unsigned char c, const environment *env,
     69 		      int *widthp = 0);
     70   void set_special_char(const char *nm, const environment *env,
     71 			int *widthp = 0);
     72   virtual void set_numbered_char(int n, const environment *env,
     73 				 int *widthp = 0);
     74   int set_char_and_width(const char *nm, const environment *env,
     75 			 int *widthp, font **f);
     76   font *get_font_from_index(int fontno);
     77   virtual void draw(int code, int *p, int np, const environment *env);
     78   // perform change of line color (text, outline) in the print-out
     79   virtual void change_color(const environment * const env);
     80   // perform change of fill color in the print-out
     81   virtual void change_fill_color(const environment * const env);
     82   virtual void begin_page(int) = 0;
     83   virtual void end_page(int page_length) = 0;
     84   virtual font *make_font(const char *nm);
     85   virtual void end_of_line();
     86   virtual void special(char *arg, const environment *env,
     87 		       char type = 'p');
     88   virtual void devtag(char *arg, const environment *env,
     89 		      char type = 'p');
     90 
     91 protected:
     92   font_pointer_list *font_list;
     93   font **font_table;
     94   int nfonts;
     95 
     96   // information about named characters
     97   int is_char_named;
     98   int is_named_set;
     99   char named_command;
    100   const char *named_char_s;
    101   int named_char_n;
    102 
    103 private:
    104   font *find_font(const char *);
    105   virtual void set_char(int index, font *f, const environment *env,
    106 			int w, const char *name) = 0;
    107 };
    108 
    109 printer *make_printer();
    110