1 files changed, 97 insertions, 0 deletions
diff --git a/src/include/printer.h b/src/include/printer.h
new file mode 100644
index 0000000..7b6a7ba
--- /dev/null
+++ b/src/include/printer.h
@@ -0,0 +1,97 @@
+// -*- 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();