1 // -*- C++ -*- 2 /* Copyright (C) 1989, 1990, 1991, 1992, 2002, 2004 3 Free Software Foundation, Inc. 4 Written by James Clark (jjc@jclark.com) 5 6 This file is part of groff. 7 8 groff is free software; you can redistribute it and/or modify it under 9 the terms of the GNU General Public License as published by the Free 10 Software Foundation; either version 2, or (at your option) any later 11 version. 12 13 groff is distributed in the hope that it will be useful, but WITHOUT ANY 14 WARRANTY; without even the implied warranty of MERCHANTABILITY or 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 16 for more details. 17 18 You should have received a copy of the GNU General Public License along 19 with groff; see the file COPYING. If not, write to the Free Software 20 Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */ 21 22 typedef void (*FONT_COMMAND_HANDLER)(const char *, const char *, 23 const char *, int); 24 25 struct font_kern_list; 26 struct font_char_metric; 27 struct font_widths_cache; 28 29 class font { 30 public: 31 enum { 32 LIG_ff = 1, 33 LIG_fi = 2, 34 LIG_fl = 4, 35 LIG_ffi = 8, 36 LIG_ffl = 16 37 }; 38 39 virtual ~font(); 40 int contains(int index); 41 int is_special(); 42 int get_width(int index, int point_size); 43 int get_height(int index, int point_size); 44 int get_depth(int index, int point_size); 45 int get_space_width(int point_size); 46 int get_character_type(int index); 47 int get_kern(int index1, int index2, int point_size); 48 int get_skew(int index, int point_size, int slant); 49 int has_ligature(int); 50 int get_italic_correction(int index, int point_size); 51 int get_left_italic_correction(int index, int point_size); 52 int get_subscript_correction(int index, int point_size); 53 int get_code(int i); 54 const char *get_special_device_encoding(int index); 55 const char *get_name(); 56 const char *get_internal_name(); 57 const char *get_image_generator(); 58 59 static int scan_papersize(const char *, const char **, double *, double *); 60 61 static font *load_font(const char *, int * = 0, int = 0); 62 static void command_line_font_dir(const char *path); 63 static FILE *open_file(const char *name, char **pathp); 64 static int load_desc(); 65 static int name_to_index(const char *); 66 static int number_to_index(int); 67 static FONT_COMMAND_HANDLER 68 set_unknown_desc_command_handler(FONT_COMMAND_HANDLER); 69 70 static int res; 71 static int hor; 72 static int vert; 73 static int unitwidth; 74 static int paperwidth; 75 static int paperlength; 76 static const char *papersize; 77 static int biggestfont; 78 static int spare2; 79 static int sizescale; 80 static int tcommand; 81 static int unscaled_charwidths; 82 static int pass_filenames; 83 static int use_charnames_in_special; 84 static const char *image_generator; 85 86 static const char **font_name_table; 87 static const char **style_table; 88 static const char *family; 89 static int *sizes; 90 private: 91 unsigned ligatures; 92 font_kern_list **kern_hash_table; 93 int space_width; 94 int *ch_index; 95 int nindices; 96 font_char_metric *ch; 97 int ch_used; 98 int ch_size; 99 int special; 100 char *name; 101 char *internalname; 102 double slant; 103 font_widths_cache *widths_cache; 104 static FONT_COMMAND_HANDLER unknown_desc_command_handler; 105 106 enum { KERN_HASH_TABLE_SIZE = 503 }; 107 108 void add_entry(int index, const font_char_metric &); 109 void copy_entry(int new_index, int old_index); 110 void add_kern(int index1, int index2, int amount); 111 static int hash_kern(int i1, int i2); 112 void alloc_ch_index(int); 113 void extend_ch(); 114 void compact(); 115 116 static int scale(int w, int pointsize); 117 static int unit_scale(double *value, char unit); 118 virtual void handle_unknown_font_command(const char *command, 119 const char *arg, 120 const char *file, int lineno); 121 protected: 122 font(const char *); 123 int load(int * = 0, int = 0); 124 }; 125