source/texk/web2c/luatexdir/font/texfont.h

   1 /* texfont.h Main font API implementation for the pascal parts
   2
   3    Copyright 2006-2010 Taco Hoekwater <taco@luatex.org>
   4
   5    This file is part of LuaTeX.
   6
   7    LuaTeX is free software; you can redistribute it and/or modify it under
   8    the terms of the GNU General Public License as published by the Free
   9    Software Foundation; either version 2 of the License, or (at your
  10    option) any later version.
  11
  12    LuaTeX is distributed in the hope that it will be useful, but WITHOUT
  13    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  15    License for more details.
  16
  17    You should have received a copy of the GNU General Public License along
  18    with LuaTeX; if not, see <http://www.gnu.org/licenses/>. */
  19
  20
  21 /* Here we have the interface to LuaTeX's font system, as seen from the
  22    main pascal program. There is a companion list in luatex.defines to
  23    keep web2c happy */
  24
  25 /*
  26     This file is read at the end of ptexlib.h, which is called for at
  27     the end of luatexcoerce.h, as well as from the C sources.
  28 */
  29
  30 #ifndef TEXFONT_H
  31 #  define TEXFONT_H
  32
  33 #  define pointer halfword
  34
  35 /* these are dumped en block, so they need endianness tests */
  36
  37 typedef struct liginfo {
  38 #  ifdef WORDS_BIGENDIAN
  39     int adj;
  40     int lig;
  41     int type;
  42 #  else
  43     int type;
  44     int lig;
  45     int adj;
  46 #  endif
  47 } liginfo;
  48
  49 /* these are dumped en block, so they need endianness tests */
  50
  51 typedef struct kerninfo {
  52 #  ifdef WORDS_BIGENDIAN
  53     int adj;
  54     scaled sc;
  55 #  else
  56     scaled sc;
  57     int adj;
  58 #  endif
  59 } kerninfo;
  60
  61 typedef struct extinfo {
  62     struct extinfo *next;
  63     int glyph;
  64     int start_overlap;
  65     int end_overlap;
  66     int advance;
  67     int extender;
  68 } extinfo;
  69
  70 /* todo: maybe create a 'math info structure' */
  71
  72 typedef struct charinfo {
  73     char *name;                 /* postscript character name */
  74     liginfo *ligatures;         /* ligature items */
  75     kerninfo *kerns;            /* kern items */
  76     eight_bits *packets;        /* virtual commands.  */
  77     unsigned short index;       /* CID index */
  78     int remainder;              /* spare value for odd items, could be union-ed with extensible */
  79     scaled width;               /* width */
  80     scaled height;              /* height */
  81     scaled depth;               /* depth */
  82     scaled italic;              /* italic correction */
  83     scaled vert_italic;         /* italic correction */
  84     scaled top_accent;          /* top accent alignment */
  85     scaled bot_accent;          /* bot accent alignment */
  86     int ef;                     /* font expansion factor */
  87     int lp;                     /* left protruding factor */
  88     int rp;                     /* right protruding factor */
  89     char tag;                   /* list / ext taginfo */
  90     char used;                  /* char is typeset ? */
  91     char *tounicode;            /* unicode equivalent */
  92     extinfo *hor_variants;      /* horizontal variants */
  93     extinfo *vert_variants;     /* vertical variants */
  94     int top_left_math_kerns;
  95     int top_right_math_kerns;
  96     int bottom_right_math_kerns;
  97     int bottom_left_math_kerns;
  98     scaled *top_left_math_kern_array;
  99     scaled *top_right_math_kern_array;
 100     scaled *bottom_right_math_kern_array;
 101     scaled *bottom_left_math_kern_array;
 102 } charinfo;
 103
 104 #  define EXT_NORMAL 0
 105 #  define EXT_REPEAT 1
 106
 107 extern extinfo *get_charinfo_vert_variants(charinfo * ci);
 108 extern extinfo *get_charinfo_hor_variants(charinfo * ci);
 109 extern void set_charinfo_hor_variants(charinfo * ci, extinfo * ext);
 110 extern void set_charinfo_vert_variants(charinfo * ci, extinfo * ext);
 111 extern void add_charinfo_vert_variant(charinfo * ci, extinfo * ext);
 112 extern void add_charinfo_hor_variant(charinfo * ci, extinfo * ext);
 113
 114 extern extinfo *copy_variants(extinfo * o);
 115
 116 extern extinfo *new_variant(int glyph, int startconnect, int endconnect, int advance, int repeater);
 117
 118 extern scaled_whd get_charinfo_whd(internal_font_number f, int c);
 119
 120 typedef struct texfont {
 121     int _font_size;
 122     int _font_dsize;
 123     int _font_units_per_em;
 124     char *_font_name;
 125     char *_font_area;
 126     char *_font_filename;
 127     char *_font_fullname;
 128     char *_font_psname;
 129     char *_font_encodingname;
 130     char *_font_cidregistry;
 131     char *_font_cidordering;
 132     int _font_cidversion;
 133     int _font_cidsupplement;
 134
 135     int _font_ec;
 136     unsigned _font_checksum;    /* internal information */
 137     char _font_used;            /* internal information */
 138     char _font_touched;         /* internal information */
 139     int _font_cache_id;         /* internal information */
 140     char _font_encodingbytes;   /* 1 or 2 bytes */
 141     boolean _font_oldmath;      /* default to false when MathConstants seen */
 142
 143     int _font_slant;            /* a slant in ppt */
 144     int _font_extend;           /* an extension in ppt, or 1000 */
 145     int font_max_shrink;
 146     int font_max_stretch;
 147     int _font_step;             /* amount of one step of expansion */
 148     boolean _font_auto_expand;  /* this font is auto-expanded? */
 149
 150     char _font_tounicode;       /* 1 if info is present */
 151     fm_entry *_font_map;
 152     int _font_type;
 153     int _font_format;
 154     int _font_embedding;
 155     int _font_bc;
 156     int _hyphen_char;
 157     int _skew_char;
 158     int _font_natural_dir;
 159
 160     charinfo *_left_boundary;
 161     charinfo *_right_boundary;
 162
 163     int _font_params;
 164     scaled *_param_base;
 165
 166     int _font_math_params;
 167     scaled *_math_param_base;
 168
 169     sa_tree characters;
 170     int charinfo_count;
 171     int charinfo_size;
 172     charinfo *charinfo;
 173     int *charinfo_cache;
 174     int ligatures_disabled;
 175
 176     int _pdf_font_num;          /* maps to a PDF resource ID */
 177     str_number _pdf_font_attr;  /* pointer to additional attributes */
 178 } texfont;
 179
 180 typedef enum {
 181     unknown_font_type = 0,      /* new font (has not been used yet) */
 182     virtual_font_type,          /* virtual font */
 183     real_font_type,             /* real font */
 184 } font_types;
 185
 186 typedef enum {
 187     unknown_format = 0,
 188     type1_format,
 189     type3_format,
 190     truetype_format,
 191     opentype_format,
 192 } font_formats;
 193
 194 typedef enum {
 195     unknown_embedding = 0,
 196     no_embedding,
 197     subset_embedding,
 198     full_embedding,
 199 } font_embedding_option;
 200
 201 extern const char *font_type_strings[];
 202 extern const char *font_format_strings[];
 203 extern const char *font_embedding_strings[];
 204
 205 #  define font_checksum(a)           font_tables[a]->_font_checksum
 206 #  define set_font_checksum(a,b)     font_checksum(a) = b
 207
 208 #  define font_check_0(a)            ((font_tables[a]->_font_checksum&0xFF000000)>>24)
 209 #  define font_check_1(a)            ((font_tables[a]->_font_checksum&0x00FF0000)>>16)
 210 #  define font_check_2(a)            ((font_tables[a]->_font_checksum&0x0000FF00)>>8)
 211 #  define font_check_3(a)             (font_tables[a]->_font_checksum&0x000000FF)
 212
 213 #  define font_size(a)               font_tables[a]->_font_size
 214 #  define set_font_size(a,b)         font_size(a) = b
 215 #  define font_dsize(a)              font_tables[a]->_font_dsize
 216 #  define set_font_dsize(a,b)        font_dsize(a) = b
 217
 218 #  define font_units_per_em(a)       font_tables[a]->_font_units_per_em
 219 #  define set_font_units_per_em(a,b) font_units_per_em(a) = b
 220
 221 #  define font_name(a)               font_tables[a]->_font_name
 222 #  define get_font_name(a)           (unsigned char *)font_name(a)
 223 #  define set_font_name(f,b)         font_name(f) = b
 224 #  define tex_font_name(a)           maketexstring(font_name(a))
 225
 226 #  define font_area(a)               font_tables[a]->_font_area
 227 #  define get_font_area(a)           (unsigned char *)font_area(a)
 228 #  define set_font_area(f,b)         font_area(f) = b
 229 #  define tex_font_area(a)           maketexstring(font_area(a))
 230
 231 boolean cmp_font_area(int, str_number);
 232
 233 #  define font_reassign(a,b)            { if (a!=NULL) free(a); a = b; }
 234
 235 #  define font_filename(a)            font_tables[a]->_font_filename
 236 #  define set_font_filename(f,b)      font_reassign(font_filename(f),b)
 237
 238 #  define font_fullname(a)            font_tables[a]->_font_fullname
 239 #  define set_font_fullname(f,b)      font_reassign(font_fullname(f),b)
 240
 241 #  define font_psname(a)              font_tables[a]->_font_psname
 242 #  define set_font_psname(f,b)        font_reassign(font_psname(f),b)
 243
 244 #  define font_encodingname(a)        font_tables[a]->_font_encodingname
 245 #  define set_font_encodingname(f,b)  font_reassign(font_encodingname(f),b)
 246
 247 #  define cmp_font_filename(a,b)      (!(font_filename(a)!=NULL || font_filename(b)!=NULL || \
 248                                        strcmp(font_filename(a),font_filename(b))))
 249 #  define cmp_font_fullname(a,b)      (!(font_fullname(a)!=NULL || font_fullname(b)!=NULL || \
 250                                        strcmp(font_fullname(a),font_fullname(b))))
 251 #  define cmp_font_encodingname(a,b)  (!(font_encoding(a)!=NULL || font_encodingname(b)!=NULL || \
 252                                        strcmp(font_encodingname(a),font_encodingname(b))))
 253
 254 #  define font_bc(a)                  font_tables[a]->_font_bc
 255 #  define set_font_bc(f,b)            font_bc(f) = b
 256
 257 #  define font_ec(a)                  font_tables[a]->_font_ec
 258 #  define set_font_ec(f,b)            font_ec(f) = b
 259
 260 #  define font_used(a)                (font_tables[a]!=NULL && font_tables[a]->_font_used)
 261 #  define set_font_used(a,b)          font_tables[a]->_font_used = b
 262
 263 #  define font_touched(a)             font_tables[a]->_font_touched
 264 #  define set_font_touched(a,b)       font_touched(a) = b
 265
 266 #  define font_type(a)                font_tables[a]->_font_type
 267 #  define set_font_type(a,b)          font_type(a) = b;
 268
 269 #  define font_format(a)              font_tables[a]->_font_format
 270 #  define font_format_name(a)         font_format_strings[font_tables[a]->_font_format]
 271 #  define set_font_format(a,b)        font_format(a) = b
 272
 273 #  define font_embedding(a)           font_tables[a]->_font_embedding
 274 #  define set_font_embedding(a,b)     font_embedding(a) = b
 275
 276 #  define font_cidversion(a)          font_tables[a]->_font_cidversion
 277 #  define set_font_cidversion(a,b)    font_cidversion(a) = b
 278
 279 #  define font_cidsupplement(a)       font_tables[a]->_font_cidsupplement
 280 #  define set_font_cidsupplement(a,b) font_cidsupplement(a) = b
 281
 282 #  define font_cidordering(a)         font_tables[a]->_font_cidordering
 283 #  define set_font_cidordering(f,b)   font_reassign(font_cidordering(f),b)
 284
 285 #  define font_cidregistry(a)         font_tables[a]->_font_cidregistry
 286 #  define set_font_cidregistry(f,b)   font_reassign(font_cidregistry(f),b)
 287
 288 #  define font_map(a)                 font_tables[a]->_font_map
 289 #  define set_font_map(a,b)           font_map(a) = b
 290
 291 #  define font_cache_id(a)            font_tables[a]->_font_cache_id
 292 #  define set_font_cache_id(a,b)      font_cache_id(a) = b
 293
 294 #  define font_encodingbytes(a)       font_tables[a]->_font_encodingbytes
 295 #  define set_font_encodingbytes(a,b) font_encodingbytes(a) = b
 296
 297 #  define font_oldmath(a)             font_tables[a]->_font_oldmath
 298 #  define set_font_oldmath(a,b)       font_oldmath(a) = b
 299
 300 #  define font_slant(a)               font_tables[a]->_font_slant
 301 #  define set_font_slant(a,b)         font_slant(a) = b
 302
 303 #  define font_extend(a)              font_tables[a]->_font_extend
 304 #  define set_font_extend(a,b)        font_extend(a) = b
 305
 306 #  define font_shrink(a)              font_tables[a]->_font_shrink
 307 #  define set_font_shrink(a,b)        font_shrink(a) = b
 308
 309 #  define font_stretch(a)             font_tables[a]->_font_stretch
 310 #  define set_font_stretch(a,b)       font_stretch(a) = b
 311
 312 #  define font_max_shrink(a)          font_tables[a]->font_max_shrink
 313 #  define set_font_max_shrink(a,b)    font_max_shrink(a) = b
 314
 315 #  define font_max_stretch(a)         font_tables[a]->font_max_stretch
 316 #  define set_font_max_stretch(a,b)   font_max_stretch(a) = b
 317
 318 #  define font_step(a)                font_tables[a]->_font_step
 319 #  define set_font_step(a,b)          font_step(a) = b
 320
 321 #  define font_auto_expand(a)         font_tables[a]->_font_auto_expand
 322 #  define set_font_auto_expand(a,b)   font_auto_expand(a) = b
 323
 324 #  define font_tounicode(a)           font_tables[a]->_font_tounicode
 325 #  define set_font_tounicode(a,b)     font_tounicode(a) = b
 326
 327 #  define hyphen_char(a)              font_tables[a]->_hyphen_char
 328 #  define set_hyphen_char(a,b)        hyphen_char(a) = b
 329
 330 #  define skew_char(a)                font_tables[a]->_skew_char
 331 #  define set_skew_char(a,b)          skew_char(a) = b
 332
 333 #  define font_natural_dir(a)         font_tables[a]->_font_natural_dir
 334 #  define set_font_natural_dir(a,b)   font_natural_dir(a) = b
 335
 336 #  define pdf_font_num(a)             font_tables[a]->_pdf_font_num
 337 #  define set_pdf_font_num(a,b)       pdf_font_num(a) = b
 338
 339 #  define pdf_font_attr(a)            font_tables[a]->_pdf_font_attr
 340 #  define set_pdf_font_attr(a,b)      pdf_font_attr(a) = b
 341
 342 #  define left_boundarychar  -1
 343 #  define right_boundarychar -2
 344 #  define non_boundarychar   -3
 345
 346 #  define left_boundary(a)        font_tables[a]->_left_boundary
 347 #  define has_left_boundary(a)    (left_boundary(a)!=NULL)
 348 #  define set_left_boundary(a,b)  font_reassign(left_boundary(a),b)
 349
 350 #  define right_boundary(a)       font_tables[a]->_right_boundary
 351 #  define has_right_boundary(a)   (right_boundary(a)!=NULL)
 352 #  define set_right_boundary(a,b) font_reassign(right_boundary(a),b)
 353
 354 #  define font_bchar(a) (right_boundary(a)!=NULL ? right_boundarychar : non_boundarychar)
 355
 356 /* font parameters */
 357
 358 #  define font_params(a)  font_tables[a]->_font_params
 359 #  define param_base(a)   font_tables[a]->_param_base
 360 #  define font_param(a,b) font_tables[a]->_param_base[b]
 361
 362 extern void set_font_params(internal_font_number f, int b);
 363
 364 #  define set_font_param(f,n,b) { \
 365     if (font_params(f)<n) \
 366         set_font_params(f,n); \
 367     font_param(f,n) = b; \
 368 }
 369 #  define font_math_params(a)  font_tables[a]->_font_math_params
 370 #  define math_param_base(a)   font_tables[a]->_math_param_base
 371 #  define font_math_param(a,b) font_tables[a]->_math_param_base[b]
 372
 373 extern void set_font_math_params(internal_font_number f, int b);
 374
 375 #  define set_font_math_param(f,n,b) { \
 376     if (font_math_params(f)<n) \
 377         set_font_math_params(f,n); \
 378     font_math_param(f,n) = b; \
 379 }
 380
 381 /* Font parameters are sometimes referred to as |slant(f)|, |space(f)|, etc.*/
 382
 383 typedef enum {
 384     slant_code = 1,
 385     space_code = 2,
 386     space_stretch_code = 3,
 387     space_shrink_code = 4,
 388     x_height_code = 5,
 389     quad_code = 6,
 390     extra_space_code = 7
 391 } font_parameter_codes;
 392
 393 #  define slant(f)         font_param(f,slant_code)
 394 #  define space(f)         font_param(f,space_code)
 395 #  define space_stretch(f) font_param(f,space_stretch_code)
 396 #  define space_shrink(f)  font_param(f,space_shrink_code)
 397 #  define x_height(f)      font_param(f,x_height_code)
 398 #  ifdef quad
 399 #    undef quad
 400 #  endif
 401 #  define quad(f)          font_param(f,quad_code)
 402 #  define extra_space(f)   font_param(f,extra_space_code)
 403
 404 /* now for characters  */
 405
 406 typedef enum {
 407     top_right_kern = 1,
 408     bottom_right_kern = 2,
 409     bottom_left_kern = 3,
 410     top_left_kern = 4
 411 } font_math_kern_codes;
 412
 413 extern charinfo *get_charinfo(internal_font_number f, int c);
 414 extern int char_exists(internal_font_number f, int c);
 415 extern charinfo *char_info(internal_font_number f, int c);
 416
 417 /*
 418     Here is a quick way to test if a glyph exists, when you are
 419     already certain the font |f| exists, and that the |c| is a regular
 420     glyph id, not one of the two special boundary objects.
 421 */
 422
 423 #  define quick_char_exists(f,c) (get_sa_item(font_tables[f]->characters,c).int_value)
 424
 425 extern void set_charinfo_width(charinfo * ci, scaled val);
 426 extern void set_charinfo_height(charinfo * ci, scaled val);
 427 extern void set_charinfo_depth(charinfo * ci, scaled val);
 428 extern void set_charinfo_italic(charinfo * ci, scaled val);
 429 extern void set_charinfo_vert_italic(charinfo * ci, scaled val);
 430 extern void set_charinfo_top_accent(charinfo * ci, scaled val);
 431 extern void set_charinfo_bot_accent(charinfo * ci, scaled val);
 432 extern void set_charinfo_tag(charinfo * ci, scaled val);
 433 extern void set_charinfo_remainder(charinfo * ci, scaled val);
 434 extern void set_charinfo_used(charinfo * ci, scaled val);
 435 extern void set_charinfo_index(charinfo * ci, scaled val);
 436 extern void set_charinfo_name(charinfo * ci, char *val);
 437 extern void set_charinfo_tounicode(charinfo * ci, char *val);
 438 extern void set_charinfo_ligatures(charinfo * ci, liginfo * val);
 439 extern void set_charinfo_kerns(charinfo * ci, kerninfo * val);
 440 extern void set_charinfo_packets(charinfo * ci, eight_bits * val);
 441 extern void set_charinfo_extensible(charinfo * ci, int a, int b, int c, int d);
 442 extern void set_charinfo_ef(charinfo * ci, scaled val);
 443 extern void set_charinfo_lp(charinfo * ci, scaled val);
 444 extern void set_charinfo_rp(charinfo * ci, scaled val);
 445
 446 extern void add_charinfo_math_kern(charinfo * ci, int type, scaled ht, scaled krn);
 447 extern int get_charinfo_math_kerns(charinfo * ci, int id);
 448
 449 #  define set_char_used(f,a,b) do { \
 450     if (char_exists(f,a)) \
 451         set_charinfo_used(char_info(f,a),b); \
 452 } while (0)
 453
 454 extern scaled get_charinfo_width(charinfo * ci);
 455 extern scaled get_charinfo_height(charinfo * ci);
 456 extern scaled get_charinfo_depth(charinfo * ci);
 457 extern scaled get_charinfo_italic(charinfo * ci);
 458 extern scaled get_charinfo_vert_italic(charinfo * ci);
 459 extern scaled get_charinfo_top_accent(charinfo * ci);
 460 extern scaled get_charinfo_bot_accent(charinfo * ci);
 461 extern char get_charinfo_tag(charinfo * ci);
 462 extern int get_charinfo_remainder(charinfo * ci);
 463 extern char get_charinfo_used(charinfo * ci);
 464 extern int get_charinfo_index(charinfo * ci);
 465 extern char *get_charinfo_name(charinfo * ci);
 466 extern char *get_charinfo_tounicode(charinfo * ci);
 467 extern liginfo *get_charinfo_ligatures(charinfo * ci);
 468 extern kerninfo *get_charinfo_kerns(charinfo * ci);
 469 extern eight_bits *get_charinfo_packets(charinfo * ci);
 470 extern int get_charinfo_ef(charinfo * ci);
 471 extern int get_charinfo_rp(charinfo * ci);
 472 extern int get_charinfo_lp(charinfo * ci);
 473 extern int get_charinfo_extensible(charinfo * ci, int which);
 474
 475 extern int ext_top(internal_font_number f, int c);
 476 extern int ext_bot(internal_font_number f, int c);
 477 extern int ext_rep(internal_font_number f, int c);
 478 extern int ext_mid(internal_font_number f, int c);
 479
 480 #  define set_ligature_item(f,b,c,d) { f.type = b; f.adj = c;  f.lig = d; }
 481 #  define set_kern_item(f,b,c) { f.adj = b;  f.sc = c; }
 482
 483 /* character information */
 484
 485 #  define non_char    65536 /* a code that can't match a real character */
 486 #  define non_address     0 /* a spurious |bchar_label| */
 487
 488 /* character kerns and ligatures */
 489
 490 #  define end_kern     0x7FFFFF /* otherchar value meaning "stop" */
 491 #  define ignored_kern 0x800000 /* otherchar value meaning "disabled" */
 492
 493 #  define charinfo_kern(b,c) b->kerns[c]
 494
 495 #  define kern_char(b)       (b).adj
 496 #  define kern_kern(b)       (b).sc
 497 #  define kern_end(b)        ((b).adj == end_kern)
 498 #  define kern_disabled(b)   ((b).adj > end_kern)
 499
 500 /* character ligatures */
 501
 502 #  define end_ligature     0x7FFFFF /* otherchar value meaning "stop" */
 503 #  define ignored_ligature 0x800000 /* otherchar value meaning "disabled" */
 504
 505 #  define charinfo_ligature(b,c)     b->ligatures[c]
 506
 507 #  define is_valid_ligature(a)   ((a).type!=0)
 508 #  define lig_type(a)            ((a).type>>1)
 509 #  define lig_char(a)            (a).adj
 510 #  define lig_replacement(a)     (a).lig
 511 #  define lig_end(a)             (lig_char(a) == end_ligature)
 512 #  define lig_disabled(a)        (lig_char(a) > end_ligature)
 513
 514 #  define no_tag   0 /* vanilla character */
 515 #  define lig_tag  1 /* character has a ligature/kerning program */
 516 #  define list_tag 2 /* character has a successor in a charlist */
 517 #  define ext_tag  3 /* character is extensible */
 518
 519 extern scaled char_height(internal_font_number f, int c);
 520 extern scaled calc_char_width(internal_font_number f, int c, int ex);
 521 extern scaled char_width(internal_font_number f, int c);
 522 extern scaled char_depth(internal_font_number f, int c);
 523 extern scaled char_italic(internal_font_number f, int c);
 524 extern scaled char_vert_italic(internal_font_number f, int c);
 525 extern scaled char_top_accent(internal_font_number f, int c);
 526 extern scaled char_bot_accent(internal_font_number f, int c);
 527
 528 extern liginfo *char_ligatures(internal_font_number f, int c);
 529 extern kerninfo *char_kerns(internal_font_number f, int c);
 530 extern eight_bits *char_packets(internal_font_number f, int c);
 531
 532 #  define has_lig(f,b)    (char_exists(f,b) &&( char_ligatures(f,b) != NULL))
 533 #  define has_kern(f,b)   (char_exists(f,b) && (char_kerns(f,b) != NULL))
 534 #  define has_packet(f,b) (char_exists(f,b) && (char_packets(f,b) != NULL))
 535
 536 extern int char_remainder(internal_font_number f, int c);
 537 extern char char_tag(internal_font_number f, int c);
 538 extern char char_used(internal_font_number f, int c);
 539 extern char *char_name(internal_font_number f, int c);
 540 extern int char_index(internal_font_number f, int c);
 541
 542 scaled raw_get_kern(internal_font_number f, int lc, int rc);
 543 scaled get_kern(internal_font_number f, int lc, int rc);
 544 liginfo get_ligature(internal_font_number f, int lc, int rc);
 545
 546 #  define EXT_TOP 0
 547 #  define EXT_BOT 1
 548 #  define EXT_MID 2
 549 #  define EXT_REP 3
 550
 551 extern texfont **font_tables;
 552
 553 int new_font(void);
 554 extern void font_malloc_charinfo(internal_font_number f, int num);
 555 int copy_font(int id);
 556 int scale_font(int id, int atsize);
 557 int max_font_id(void);
 558 void set_max_font_id(int id);
 559 int new_font_id(void);
 560 void create_null_font(void);
 561 void delete_font(int id);
 562 boolean is_valid_font(int id);
 563
 564 void dump_font(int font_number);
 565 void undump_font(int font_number);
 566
 567 int test_no_ligatures(internal_font_number f);
 568 void set_no_ligatures(internal_font_number f);
 569
 570 extern int get_tag_code(internal_font_number f, int c);
 571 extern int get_lp_code(internal_font_number f, int c);
 572 extern int get_rp_code(internal_font_number f, int c);
 573 extern int get_ef_code(internal_font_number f, int c);
 574
 575 extern void set_tag_code(internal_font_number f, int c, int i);
 576 extern void set_lp_code(internal_font_number f, int c, int i);
 577 extern void set_rp_code(internal_font_number f, int c, int i);
 578 extern void set_ef_code(internal_font_number f, int c, int i);
 579
 580 int read_tfm_info(internal_font_number f, const char *nom, scaled s);
 581
 582 /* from dofont.c */
 583
 584 extern int read_font_info(pointer u, char *cnom, scaled s, int ndir);
 585 extern int find_font_id(const char *nom, scaled s);
 586
 587 /* for and from vfpacket.c */
 588
 589 typedef enum { packet_char_code,
 590     packet_font_code,
 591     packet_pop_code,
 592     packet_push_code,
 593     packet_special_code,
 594     packet_image_code,
 595     packet_right_code,
 596     packet_down_code,
 597     packet_rule_code,
 598     packet_node_code,
 599     packet_nop_code,
 600     packet_end_code,
 601     packet_scale_code,
 602     packet_lua_code,
 603 } packet_command_codes;
 604
 605 extern scaled store_scaled_f(scaled sq, int fw);
 606
 607 extern void do_vf_packet(PDF pdf, internal_font_number vf_f, int c, int ex);
 608 extern int vf_packet_bytes(charinfo * co);
 609
 610 extern charinfo *copy_charinfo(charinfo * ci);
 611
 612 /* this function is in vfovf.c for the moment */
 613
 614 extern int make_vf_table(lua_State * L, const char *name, scaled s);
 615
 616 /* some bits of the old interface, used by e.g. writet3.c */
 617
 618 #  define get_x_height(f) x_height(f)
 619 #  define get_quad(f) quad(f)
 620 #  define get_slant(f) slant(f)
 621 #  define get_charwidth(f,c) (char_exists(f,c) ? char_width(f,c) : 0)
 622 #  define get_charheight(f,c) (char_exists(f,c) ? char_height(f,c) : 0)
 623 #  define get_chardepth(f,c) (char_exists(f,c) ? char_depth(f,c) : 0)
 624
 625 extern int pk_dpi; /* PK pixel density value from \.{texmf.cnf} */
 626
 627 extern internal_font_number tfm_lookup(char *s, scaled fs);
 628
 629 extern int fix_expand_value(internal_font_number f, int e);
 630
 631 extern void set_expand_params(internal_font_number f, boolean auto_expand,
 632                               int stretch_limit, int shrink_limit,
 633                               int font_step);
 634
 635 extern void read_expand_font(void);
 636 extern void new_letterspaced_font(small_number a);
 637 extern void make_font_copy(small_number a);
 638
 639 extern void glyph_to_unicode(void);
 640
 641 #endif