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// -*- C++ -*-
// <groff_src_dir>/src/include/printer.h
/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
Written by James Clark (jjc@jclark.com)
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 3 of the License, 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* 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, const char *);
void set_ascii_char(unsigned char, const environment *, int * = 0);
void set_special_char(const char *, const environment *, int * = 0);
virtual void set_numbered_char(int, const environment *, int * = 0);
glyph *set_char_and_width(const char *, const environment *,
int *, font **);
font *get_font_from_index(int);
virtual void draw(int, int *, int, const environment *);
// perform change of line color (text, outline) in the print-out
virtual void change_color(const environment * const);
// perform change of fill color in the print-out
virtual void change_fill_color(const environment * const);
virtual void begin_page(int) = 0;
virtual void end_page(int) = 0;
virtual font *make_font(const char *);
virtual void end_of_line();
virtual void special(char *, const environment *, char = 'p');
virtual void devtag(char *, const environment *, char = '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(glyph *, font *, const environment *, int,
const char *) = 0;
};
printer *make_printer();
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