1993-07-15 20:32:02 +04:00
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// -*- C++ -*-
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/* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
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Written by James Clark (jjc@jclark.com)
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This file is part of groff.
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groff is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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groff is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License along
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with groff; see the file COPYING. If not, write to the Free Software
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1996-08-13 11:03:54 +04:00
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Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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1993-07-15 20:32:02 +04:00
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typedef void (*FONT_COMMAND_HANDLER)(const char *, const char *,
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const char *, int);
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struct font_kern_list;
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struct font_char_metric;
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struct font_widths_cache;
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class font {
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public:
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enum {
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LIG_ff = 1,
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LIG_fi = 2,
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LIG_fl = 4,
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LIG_ffi = 8,
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LIG_ffl = 16
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};
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virtual ~font();
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int contains(int index);
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int is_special();
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int get_width(int index, int point_size);
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int get_height(int index, int point_size);
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int get_depth(int index, int point_size);
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int get_space_width(int point_size);
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int get_character_type(int index);
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int get_kern(int index1, int index2, int point_size);
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int get_skew(int index, int point_size, int slant);
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int has_ligature(int);
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int get_italic_correction(int index, int point_size);
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int get_left_italic_correction(int index, int point_size);
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int get_subscript_correction(int index, int point_size);
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int get_code(int i);
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const char *get_name();
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const char *get_internal_name();
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static font *load_font(const char *, int *not_found = 0);
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static void command_line_font_dir(const char *path);
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static FILE *open_file(const char *name, char **pathp);
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static int load_desc();
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static int name_to_index(const char *);
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static int number_to_index(int);
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static FONT_COMMAND_HANDLER
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set_unknown_desc_command_handler(FONT_COMMAND_HANDLER);
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static int res;
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static int hor;
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static int vert;
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static int unitwidth;
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static int paperwidth;
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static int paperlength;
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static int biggestfont;
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static int spare2;
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static int sizescale;
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static int tcommand;
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static const char **font_name_table;
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static const char **style_table;
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static const char *family;
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static int *sizes;
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private:
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unsigned ligatures;
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font_kern_list **kern_hash_table;
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int space_width;
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short *ch_index;
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int nindices;
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font_char_metric *ch;
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int ch_used;
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int ch_size;
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int special;
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char *name;
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char *internalname;
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double slant;
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font_widths_cache *widths_cache;
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static FONT_COMMAND_HANDLER unknown_desc_command_handler;
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enum { KERN_HASH_TABLE_SIZE = 503 };
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void add_entry(int index, const font_char_metric &);
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void copy_entry(int new_index, int old_index);
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void add_kern(int index1, int index2, int amount);
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static int hash_kern(int i1, int i2);
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void alloc_ch_index(int);
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void extend_ch();
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void compact();
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static int scale(int w, int pointsize);
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virtual void handle_unknown_font_command(const char *command,
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const char *arg,
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const char *file, int lineno);
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protected:
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font(const char *);
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int load(int *not_found = 0);
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};
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