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// -*- C++ -*-
// <groff_src_dir>/src/include/printer.h
/* Copyright (C) 1989, 1990, 1991, 1992, 2001, 2002, 2003, 2004
Free Software Foundation, Inc.
Written by James Clark (jjc@jclark.com)
Last update: 12 Apr 2002
This file is part of groff.
groff is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
groff is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with groff; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA.
*/
/* Description
The class `printer' performs the postprocessing. Each
postprocessor only needs to implement a derived class of `printer' and
a suitable function `make_printer' for the device-dependent tasks.
Then the methods of class `printer' are called automatically by
`do_file()' in `input.cpp'.
*/
#include "color.h"
struct environment {
int fontno;
int size;
int hpos;
int vpos;
int height;
int slant;
color *col;
color *fill;
};
class font;
struct font_pointer_list {
font *p;
font_pointer_list *next;
font_pointer_list(font *, font_pointer_list *);
};
class printer {
public:
printer();
virtual ~printer();
void load_font(int i, const char *name);
void set_ascii_char(unsigned char c, const environment *env,
int *widthp = 0);
void set_special_char(const char *nm, const environment *env,
int *widthp = 0);
virtual void set_numbered_char(int n, const environment *env,
int *widthp = 0);
int set_char_and_width(const char *nm, const environment *env,
int *widthp, font **f);
font *get_font_from_index(int fontno);
virtual void draw(int code, int *p, int np, const environment *env);
// perform change of line color (text, outline) in the print-out
virtual void change_color(const environment * const env);
// perform change of fill color in the print-out
virtual void change_fill_color(const environment * const env);
virtual void begin_page(int) = 0;
virtual void end_page(int page_length) = 0;
virtual font *make_font(const char *nm);
virtual void end_of_line();
virtual void special(char *arg, const environment *env,
char type = 'p');
protected:
font_pointer_list *font_list;
font **font_table;
int nfonts;
// information about named characters
int is_char_named;
int is_named_set;
char named_command;
const char *named_char_s;
int named_char_n;
private:
font *find_font(const char *);
virtual void set_char(int index, font *f, const environment *env,
int w, const char *name) = 0;
};
printer *make_printer();
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