| 1 | /* xfont.c -- X core font driver. |
| 2 | Copyright (C) 2006 Free Software Foundation, Inc. |
| 3 | Copyright (C) 2006 |
| 4 | National Institute of Advanced Industrial Science and Technology (AIST) |
| 5 | Registration Number H13PRO009 |
| 6 | |
| 7 | This file is part of GNU Emacs. |
| 8 | |
| 9 | GNU Emacs is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 2, or (at your option) |
| 12 | any later version. |
| 13 | |
| 14 | GNU Emacs is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with GNU Emacs; see the file COPYING. If not, write to |
| 21 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| 22 | Boston, MA 02110-1301, USA. */ |
| 23 | |
| 24 | #include <config.h> |
| 25 | #include <stdio.h> |
| 26 | #include <X11/Xlib.h> |
| 27 | |
| 28 | #include "lisp.h" |
| 29 | #include "dispextern.h" |
| 30 | #include "xterm.h" |
| 31 | #include "frame.h" |
| 32 | #include "blockinput.h" |
| 33 | #include "character.h" |
| 34 | #include "charset.h" |
| 35 | #include "fontset.h" |
| 36 | #include "font.h" |
| 37 | |
| 38 | \f |
| 39 | /* X core font driver. */ |
| 40 | |
| 41 | Lisp_Object Qx; |
| 42 | |
| 43 | /* Alist of font registry symbol and the corresponding charsets |
| 44 | information. The information is retrieved from |
| 45 | Vfont_encoding_alist on demand. |
| 46 | |
| 47 | Eash element has the form: |
| 48 | (REGISTRY . (ENCODING-CHARSET-ID . REPERTORY-CHARSET-ID)) |
| 49 | or |
| 50 | (REGISTRY . nil) |
| 51 | |
| 52 | In the former form, ENCODING-CHARSET-ID is an ID of a charset that |
| 53 | encodes a character code to a glyph code of a font, and |
| 54 | REPERTORY-CHARSET-ID is an ID of a charset that tells if a |
| 55 | character is supported by a font. |
| 56 | |
| 57 | The latter form means that the information for REGISTRY couldn't be |
| 58 | retrieved. */ |
| 59 | static Lisp_Object x_font_charset_alist; |
| 60 | |
| 61 | /* Prototypes of support functions. */ |
| 62 | extern void x_clear_errors P_ ((Display *)); |
| 63 | |
| 64 | static char *xfont_query_font P_ ((Display *, char *, Lisp_Object)); |
| 65 | static XCharStruct *xfont_get_pcm P_ ((XFontStruct *, XChar2b *)); |
| 66 | static int xfont_registry_charsets P_ ((Lisp_Object, struct charset **, |
| 67 | struct charset **)); |
| 68 | |
| 69 | static char * |
| 70 | xfont_query_font (display, name, spec) |
| 71 | Display *display; |
| 72 | char *name; |
| 73 | Lisp_Object spec; |
| 74 | { |
| 75 | XFontStruct *font; |
| 76 | |
| 77 | BLOCK_INPUT; |
| 78 | x_catch_errors (display); |
| 79 | font = XLoadQueryFont (display, name); |
| 80 | name = NULL; |
| 81 | if (x_had_errors_p (display)) |
| 82 | { |
| 83 | /* This error is perhaps due to insufficient memory on X |
| 84 | server. Let's just ignore it. */ |
| 85 | x_clear_errors (display); |
| 86 | } |
| 87 | else if (font) |
| 88 | { |
| 89 | unsigned long value; |
| 90 | |
| 91 | if (XGetFontProperty (font, XA_FONT, &value)) |
| 92 | { |
| 93 | char *n = (char *) XGetAtomName (display, (Atom) value); |
| 94 | |
| 95 | if (font_parse_xlfd (n, spec, 0) >= 0) |
| 96 | name = n; |
| 97 | else |
| 98 | XFree (n); |
| 99 | } |
| 100 | XFreeFont (display, font); |
| 101 | } |
| 102 | x_uncatch_errors (); |
| 103 | UNBLOCK_INPUT; |
| 104 | |
| 105 | return name; |
| 106 | } |
| 107 | |
| 108 | |
| 109 | /* Get metrics of character CHAR2B in XFONT. Value is null if CHAR2B |
| 110 | is not contained in the font. */ |
| 111 | |
| 112 | static XCharStruct * |
| 113 | xfont_get_pcm (xfont, char2b) |
| 114 | XFontStruct *xfont; |
| 115 | XChar2b *char2b; |
| 116 | { |
| 117 | /* The result metric information. */ |
| 118 | XCharStruct *pcm = NULL; |
| 119 | |
| 120 | xassert (xfont && char2b); |
| 121 | |
| 122 | if (xfont->per_char != NULL) |
| 123 | { |
| 124 | if (xfont->min_byte1 == 0 && xfont->max_byte1 == 0) |
| 125 | { |
| 126 | /* min_char_or_byte2 specifies the linear character index |
| 127 | corresponding to the first element of the per_char array, |
| 128 | max_char_or_byte2 is the index of the last character. A |
| 129 | character with non-zero CHAR2B->byte1 is not in the font. |
| 130 | A character with byte2 less than min_char_or_byte2 or |
| 131 | greater max_char_or_byte2 is not in the font. */ |
| 132 | if (char2b->byte1 == 0 |
| 133 | && char2b->byte2 >= xfont->min_char_or_byte2 |
| 134 | && char2b->byte2 <= xfont->max_char_or_byte2) |
| 135 | pcm = xfont->per_char + char2b->byte2 - xfont->min_char_or_byte2; |
| 136 | } |
| 137 | else |
| 138 | { |
| 139 | /* If either min_byte1 or max_byte1 are nonzero, both |
| 140 | min_char_or_byte2 and max_char_or_byte2 are less than |
| 141 | 256, and the 2-byte character index values corresponding |
| 142 | to the per_char array element N (counting from 0) are: |
| 143 | |
| 144 | byte1 = N/D + min_byte1 |
| 145 | byte2 = N\D + min_char_or_byte2 |
| 146 | |
| 147 | where: |
| 148 | |
| 149 | D = max_char_or_byte2 - min_char_or_byte2 + 1 |
| 150 | / = integer division |
| 151 | \ = integer modulus */ |
| 152 | if (char2b->byte1 >= xfont->min_byte1 |
| 153 | && char2b->byte1 <= xfont->max_byte1 |
| 154 | && char2b->byte2 >= xfont->min_char_or_byte2 |
| 155 | && char2b->byte2 <= xfont->max_char_or_byte2) |
| 156 | pcm = (xfont->per_char |
| 157 | + ((xfont->max_char_or_byte2 - xfont->min_char_or_byte2 + 1) |
| 158 | * (char2b->byte1 - xfont->min_byte1)) |
| 159 | + (char2b->byte2 - xfont->min_char_or_byte2)); |
| 160 | } |
| 161 | } |
| 162 | else |
| 163 | { |
| 164 | /* If the per_char pointer is null, all glyphs between the first |
| 165 | and last character indexes inclusive have the same |
| 166 | information, as given by both min_bounds and max_bounds. */ |
| 167 | if (char2b->byte2 >= xfont->min_char_or_byte2 |
| 168 | && char2b->byte2 <= xfont->max_char_or_byte2) |
| 169 | pcm = &xfont->max_bounds; |
| 170 | } |
| 171 | |
| 172 | return ((pcm == NULL |
| 173 | || (pcm->width == 0 && (pcm->rbearing - pcm->lbearing) == 0)) |
| 174 | ? NULL : pcm); |
| 175 | } |
| 176 | |
| 177 | extern Lisp_Object find_font_encoding P_ ((Lisp_Object)); |
| 178 | |
| 179 | /* Return encoding charset and repertory charset for REGISTRY in |
| 180 | ENCODING and REPERTORY correspondingly. If correct information for |
| 181 | REGISTRY is available, return 0. Otherwise return -1. */ |
| 182 | |
| 183 | static int |
| 184 | xfont_registry_charsets (registry, encoding, repertory) |
| 185 | Lisp_Object registry; |
| 186 | struct charset **encoding, **repertory; |
| 187 | { |
| 188 | Lisp_Object val; |
| 189 | int encoding_id, repertory_id; |
| 190 | |
| 191 | val = assq_no_quit (registry, x_font_charset_alist); |
| 192 | if (! NILP (val)) |
| 193 | { |
| 194 | val = XCDR (val); |
| 195 | if (NILP (val)) |
| 196 | return -1; |
| 197 | encoding_id = XINT (XCAR (val)); |
| 198 | repertory_id = XINT (XCDR (val)); |
| 199 | } |
| 200 | else |
| 201 | { |
| 202 | val = find_font_encoding (SYMBOL_NAME (registry)); |
| 203 | if (SYMBOLP (val) && CHARSETP (val)) |
| 204 | { |
| 205 | encoding_id = repertory_id = XINT (CHARSET_SYMBOL_ID (val)); |
| 206 | } |
| 207 | else if (CONSP (val)) |
| 208 | { |
| 209 | if (! CHARSETP (XCAR (val))) |
| 210 | goto invalid_entry; |
| 211 | encoding_id = XINT (CHARSET_SYMBOL_ID (XCAR (val))); |
| 212 | if (NILP (XCDR (val))) |
| 213 | repertory_id = -1; |
| 214 | else |
| 215 | { |
| 216 | if (! CHARSETP (XCDR (val))) |
| 217 | goto invalid_entry; |
| 218 | repertory_id = XINT (CHARSET_SYMBOL_ID (XCDR (val))); |
| 219 | } |
| 220 | } |
| 221 | else |
| 222 | goto invalid_entry; |
| 223 | val = Fcons (make_number (encoding_id), make_number (repertory_id)); |
| 224 | x_font_charset_alist |
| 225 | = nconc2 (x_font_charset_alist, Fcons (Fcons (registry, val), Qnil)); |
| 226 | } |
| 227 | |
| 228 | if (encoding) |
| 229 | *encoding = CHARSET_FROM_ID (encoding_id); |
| 230 | if (repertory) |
| 231 | *repertory = repertory_id >= 0 ? CHARSET_FROM_ID (repertory_id) : NULL; |
| 232 | return 0; |
| 233 | |
| 234 | invalid_entry: |
| 235 | x_font_charset_alist |
| 236 | = nconc2 (x_font_charset_alist, Fcons (Fcons (registry, Qnil), Qnil)); |
| 237 | return -1; |
| 238 | } |
| 239 | |
| 240 | static Lisp_Object xfont_get_cache P_ ((Lisp_Object)); |
| 241 | static int xfont_parse_name P_ ((FRAME_PTR, char *, Lisp_Object)); |
| 242 | static Lisp_Object xfont_list P_ ((Lisp_Object, Lisp_Object)); |
| 243 | static Lisp_Object xfont_list_family P_ ((Lisp_Object)); |
| 244 | static struct font *xfont_open P_ ((FRAME_PTR, Lisp_Object, int)); |
| 245 | static void xfont_close P_ ((FRAME_PTR, struct font *)); |
| 246 | static int xfont_prepare_face P_ ((FRAME_PTR, struct face *)); |
| 247 | #if 0 |
| 248 | static void xfont_done_face P_ ((FRAME_PTR, struct face *)); |
| 249 | #endif |
| 250 | static int xfont_has_char P_ ((Lisp_Object, int)); |
| 251 | static unsigned xfont_encode_char P_ ((struct font *, int)); |
| 252 | static int xfont_text_extents P_ ((struct font *, unsigned *, int, |
| 253 | struct font_metrics *)); |
| 254 | static int xfont_draw P_ ((struct glyph_string *, int, int, int, int, int)); |
| 255 | |
| 256 | struct font_driver xfont_driver = |
| 257 | { |
| 258 | (Lisp_Object) NULL, /* Qx */ |
| 259 | xfont_get_cache, |
| 260 | xfont_parse_name, |
| 261 | xfont_list, |
| 262 | xfont_list_family, |
| 263 | NULL, |
| 264 | xfont_open, |
| 265 | xfont_close, |
| 266 | xfont_prepare_face, |
| 267 | NULL /*xfont_done_face*/, |
| 268 | xfont_has_char, |
| 269 | xfont_encode_char, |
| 270 | xfont_text_extents, |
| 271 | xfont_draw, |
| 272 | }; |
| 273 | |
| 274 | extern Lisp_Object QCname; |
| 275 | |
| 276 | static Lisp_Object |
| 277 | xfont_get_cache (frame) |
| 278 | Lisp_Object frame; |
| 279 | { |
| 280 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (XFRAME (frame)); |
| 281 | |
| 282 | return (dpyinfo->name_list_element); |
| 283 | } |
| 284 | |
| 285 | static int |
| 286 | xfont_parse_name (f, name, spec) |
| 287 | FRAME_PTR f; |
| 288 | char *name; |
| 289 | Lisp_Object spec; |
| 290 | { |
| 291 | if (font_parse_xlfd (name, spec, 0) >= 0) |
| 292 | return 0; |
| 293 | name = xfont_query_font (FRAME_X_DISPLAY (f), name, spec); |
| 294 | if (name) |
| 295 | { |
| 296 | XFree (name); |
| 297 | return 0; |
| 298 | } |
| 299 | return -1; |
| 300 | } |
| 301 | |
| 302 | extern Lisp_Object Vface_alternative_font_registry_alist; |
| 303 | |
| 304 | static Lisp_Object |
| 305 | xfont_list (frame, spec) |
| 306 | Lisp_Object frame, spec; |
| 307 | { |
| 308 | FRAME_PTR f = XFRAME (frame); |
| 309 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); |
| 310 | Lisp_Object *vec, val, extra, font_name, entity; |
| 311 | char name[256], **names; |
| 312 | int i, idx, limit, num_fonts; |
| 313 | int error_occurred = 0; |
| 314 | USE_SAFE_ALLOCA; |
| 315 | |
| 316 | extra = AREF (spec, FONT_EXTRA_INDEX); |
| 317 | font_name = Qnil; |
| 318 | if (CONSP (extra)) |
| 319 | { |
| 320 | val = Fassq (QCotf, extra); |
| 321 | if (! NILP (val)) |
| 322 | return null_vector; |
| 323 | val = Fassq (QCname, extra); |
| 324 | if (CONSP (val)) |
| 325 | font_name = XCDR (val); |
| 326 | } |
| 327 | |
| 328 | if (! STRINGP (font_name) |
| 329 | && font_unparse_xlfd (spec, 0, name, 256) < 0) |
| 330 | return null_vector; |
| 331 | |
| 332 | BLOCK_INPUT; |
| 333 | x_catch_errors (dpyinfo->display); |
| 334 | |
| 335 | if (STRINGP (font_name)) |
| 336 | { |
| 337 | XFontStruct *font = XLoadQueryFont (dpyinfo->display, |
| 338 | (char *) SDATA (font_name)); |
| 339 | unsigned long value; |
| 340 | |
| 341 | num_fonts = 0; |
| 342 | if (x_had_errors_p (dpyinfo->display)) |
| 343 | { |
| 344 | /* This error is perhaps due to insufficient memory on X |
| 345 | server. Let's just ignore it. */ |
| 346 | font = NULL; |
| 347 | error_occurred = 1; |
| 348 | x_clear_errors (dpyinfo->display); |
| 349 | } |
| 350 | if (font) |
| 351 | { |
| 352 | if (XGetFontProperty (font, XA_FONT, &value)) |
| 353 | { |
| 354 | char *n = (char *) XGetAtomName (dpyinfo->display, (Atom) value); |
| 355 | int len = strlen (n); |
| 356 | char *tmp; |
| 357 | |
| 358 | /* If DXPC (a Differential X Protocol Compressor) |
| 359 | Ver.3.7 is running, XGetAtomName will return null |
| 360 | string. We must avoid such a name. */ |
| 361 | if (len > 0) |
| 362 | { |
| 363 | num_fonts = 1; |
| 364 | names = (char **) alloca (sizeof (char *)); |
| 365 | /* Some systems only allow alloca assigned to a |
| 366 | simple var. */ |
| 367 | tmp = (char *) alloca (len + 1); names[0] = tmp; |
| 368 | bcopy (n, names[0], len + 1); |
| 369 | } |
| 370 | XFree (n); |
| 371 | } |
| 372 | XFreeFont (dpyinfo->display, font); |
| 373 | } |
| 374 | } |
| 375 | else |
| 376 | { |
| 377 | Lisp_Object registry = AREF (spec, FONT_REGISTRY_INDEX); |
| 378 | Lisp_Object alter = Qnil; |
| 379 | char *r = NULL; |
| 380 | |
| 381 | if (! NILP (registry)) |
| 382 | alter = Fassoc_string (SYMBOL_NAME (registry), |
| 383 | Vface_alternative_font_registry_alist); |
| 384 | while (1) |
| 385 | { |
| 386 | for (limit = 512, num_fonts = 0; ; limit *= 2) |
| 387 | { |
| 388 | names = XListFonts (dpyinfo->display, name, limit, &num_fonts); |
| 389 | if (x_had_errors_p (dpyinfo->display)) |
| 390 | { |
| 391 | /* This error is perhaps due to insufficient memory |
| 392 | on X server. Let's just ignore it. */ |
| 393 | x_clear_errors (dpyinfo->display); |
| 394 | error_occurred = 1; |
| 395 | num_fonts = 0; |
| 396 | break; |
| 397 | } |
| 398 | if (num_fonts < limit) |
| 399 | break; |
| 400 | XFreeFontNames (names); |
| 401 | } |
| 402 | if (num_fonts > 0 |
| 403 | || NILP (alter)) |
| 404 | break; |
| 405 | |
| 406 | /* Setup for trying alternatives. */ |
| 407 | if (! r |
| 408 | && ! (r = strstr (name, (char *) SDATA (SYMBOL_NAME (registry))))) |
| 409 | abort (); |
| 410 | while (1) |
| 411 | { |
| 412 | registry = Qnil; |
| 413 | alter = XCDR (alter); |
| 414 | if (NILP (alter)) |
| 415 | break; |
| 416 | registry = XCAR (alter); |
| 417 | if ((r - name) + SBYTES (registry) < 255) |
| 418 | break; |
| 419 | } |
| 420 | if (NILP (registry)) |
| 421 | break; |
| 422 | bcopy (SDATA (registry), r, SBYTES (registry)); |
| 423 | } |
| 424 | } |
| 425 | |
| 426 | x_uncatch_errors (); |
| 427 | UNBLOCK_INPUT; |
| 428 | |
| 429 | if (error_occurred) |
| 430 | return Qnil; |
| 431 | if (num_fonts == 0) |
| 432 | return null_vector; |
| 433 | |
| 434 | entity = Fmake_vector (make_number (FONT_ENTITY_MAX), Qnil); |
| 435 | ASET (entity, FONT_TYPE_INDEX, Qx); |
| 436 | ASET (entity, FONT_FRAME_INDEX, frame); |
| 437 | |
| 438 | SAFE_ALLOCA_LISP (vec, num_fonts); |
| 439 | for (i = idx = 0; i < num_fonts; i++) |
| 440 | { |
| 441 | if (font_parse_xlfd (names[i], entity, 0) > 0) |
| 442 | vec[idx++] = Fcopy_sequence (entity); |
| 443 | } |
| 444 | if (! STRINGP (font_name)) |
| 445 | { |
| 446 | BLOCK_INPUT; |
| 447 | XFreeFontNames (names); |
| 448 | UNBLOCK_INPUT; |
| 449 | } |
| 450 | val = Fvector (idx, vec); |
| 451 | SAFE_FREE (); |
| 452 | |
| 453 | return val; |
| 454 | } |
| 455 | |
| 456 | static int |
| 457 | memq_no_quit (elt, list) |
| 458 | Lisp_Object elt, list; |
| 459 | { |
| 460 | while (CONSP (list) && ! EQ (XCAR (list), elt)) |
| 461 | list = XCDR (list); |
| 462 | return (CONSP (list)); |
| 463 | } |
| 464 | |
| 465 | static Lisp_Object |
| 466 | xfont_list_family (frame) |
| 467 | { |
| 468 | FRAME_PTR f = XFRAME (frame); |
| 469 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); |
| 470 | char **names; |
| 471 | int num_fonts, i; |
| 472 | Lisp_Object list; |
| 473 | char *last_family; |
| 474 | int last_len; |
| 475 | |
| 476 | BLOCK_INPUT; |
| 477 | x_catch_errors (dpyinfo->display); |
| 478 | names = XListFonts (dpyinfo->display, "-*-*-*-*-*-*-*-*-*-*-*-*-*-*", |
| 479 | 0x8000, &num_fonts); |
| 480 | if (x_had_errors_p (dpyinfo->display)) |
| 481 | { |
| 482 | /* This error is perhaps due to insufficient memory on X server. |
| 483 | Let's just ignore it. */ |
| 484 | x_clear_errors (dpyinfo->display); |
| 485 | num_fonts = 0; |
| 486 | } |
| 487 | |
| 488 | list = Qnil; |
| 489 | for (i = 0, last_len = 0; i < num_fonts; i++) |
| 490 | { |
| 491 | char *p0 = names[i], *p1; |
| 492 | Lisp_Object family; |
| 493 | |
| 494 | p0++; /* skip the leading '-' */ |
| 495 | while (*p0 && *p0 != '-') p0++; /* skip foundry */ |
| 496 | if (! *p0) |
| 497 | continue; |
| 498 | p1 = ++p0; |
| 499 | while (*p1 && *p1 != '-') p1++; /* find the end of family */ |
| 500 | if (! *p1 || p1 == p0) |
| 501 | continue; |
| 502 | if (last_len == p1 - p0 |
| 503 | && bcmp (last_family, p0, last_len) == 0) |
| 504 | continue; |
| 505 | last_len = p1 - p0; |
| 506 | last_family = p0; |
| 507 | family = intern_downcase (p0, last_len); |
| 508 | if (! memq_no_quit (family, list)) |
| 509 | list = Fcons (family, list); |
| 510 | } |
| 511 | |
| 512 | XFreeFontNames (names); |
| 513 | x_uncatch_errors (); |
| 514 | UNBLOCK_INPUT; |
| 515 | |
| 516 | return list; |
| 517 | } |
| 518 | |
| 519 | static struct font * |
| 520 | xfont_open (f, entity, pixel_size) |
| 521 | FRAME_PTR f; |
| 522 | Lisp_Object entity; |
| 523 | int pixel_size; |
| 524 | { |
| 525 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); |
| 526 | Display *display = dpyinfo->display; |
| 527 | char name[256]; |
| 528 | int len; |
| 529 | unsigned long value; |
| 530 | Lisp_Object registry; |
| 531 | struct charset *encoding, *repertory; |
| 532 | struct font *font; |
| 533 | XFontStruct *xfont; |
| 534 | |
| 535 | /* At first, check if we know how to encode characters for this |
| 536 | font. */ |
| 537 | registry = AREF (entity, FONT_REGISTRY_INDEX); |
| 538 | if (xfont_registry_charsets (registry, &encoding, &repertory) < 0) |
| 539 | return NULL; |
| 540 | |
| 541 | if (XINT (AREF (entity, FONT_SIZE_INDEX)) != 0) |
| 542 | pixel_size = XINT (AREF (entity, FONT_SIZE_INDEX)); |
| 543 | len = font_unparse_xlfd (entity, pixel_size, name, 256); |
| 544 | if (len <= 0) |
| 545 | return NULL; |
| 546 | |
| 547 | BLOCK_INPUT; |
| 548 | x_catch_errors (display); |
| 549 | xfont = XLoadQueryFont (display, name); |
| 550 | if (x_had_errors_p (display)) |
| 551 | { |
| 552 | /* This error is perhaps due to insufficient memory on X server. |
| 553 | Let's just ignore it. */ |
| 554 | x_clear_errors (display); |
| 555 | xfont = NULL; |
| 556 | } |
| 557 | x_uncatch_errors (); |
| 558 | UNBLOCK_INPUT; |
| 559 | |
| 560 | if (! xfont) |
| 561 | return NULL; |
| 562 | font = malloc (sizeof (struct font)); |
| 563 | font->font.font = xfont; |
| 564 | font->entity = entity; |
| 565 | font->pixel_size = pixel_size; |
| 566 | font->driver = &xfont_driver; |
| 567 | font->font.name = malloc (len + 1); |
| 568 | if (! font->font.name) |
| 569 | { |
| 570 | XFreeFont (display, xfont); |
| 571 | free (font); |
| 572 | return NULL; |
| 573 | } |
| 574 | bcopy (name, font->font.name, len + 1); |
| 575 | font->font.charset = encoding->id; |
| 576 | font->encoding_charset = encoding->id; |
| 577 | font->repertory_charet = repertory ? repertory->id : -1; |
| 578 | font->ascent = xfont->ascent; |
| 579 | font->descent = xfont->descent; |
| 580 | |
| 581 | if (xfont->min_bounds.width == xfont->max_bounds.width) |
| 582 | { |
| 583 | /* Fixed width font. */ |
| 584 | font->font.average_width = font->font.space_width |
| 585 | = xfont->min_bounds.width; |
| 586 | } |
| 587 | else |
| 588 | { |
| 589 | XChar2b char2b; |
| 590 | XCharStruct *pcm; |
| 591 | |
| 592 | char2b.byte1 = 0x00, char2b.byte2 = 0x20; |
| 593 | pcm = xfont_get_pcm (xfont, &char2b); |
| 594 | if (pcm) |
| 595 | font->font.space_width = pcm->width; |
| 596 | else |
| 597 | font->font.space_width = xfont->max_bounds.width; |
| 598 | |
| 599 | font->font.average_width |
| 600 | = (XGetFontProperty (xfont, dpyinfo->Xatom_AVERAGE_WIDTH, &value) |
| 601 | ? (long) value / 10 : 0); |
| 602 | if (font->font.average_width < 0) |
| 603 | font->font.average_width = - font->font.average_width; |
| 604 | if (font->font.average_width == 0) |
| 605 | { |
| 606 | if (pcm) |
| 607 | { |
| 608 | int width = pcm->width; |
| 609 | for (char2b.byte2 = 33; char2b.byte2 <= 126; char2b.byte2++) |
| 610 | if ((pcm = xfont_get_pcm (xfont, &char2b)) != NULL) |
| 611 | width += pcm->width; |
| 612 | font->font.average_width = width / 95; |
| 613 | } |
| 614 | else |
| 615 | font->font.average_width = xfont->max_bounds.width; |
| 616 | } |
| 617 | } |
| 618 | font->min_width = xfont->min_bounds.width; |
| 619 | if (font->min_width <= 0) |
| 620 | font->min_width = font->font.space_width; |
| 621 | |
| 622 | BLOCK_INPUT; |
| 623 | /* Try to get the full name of FONT. Put it in FULL_NAME. */ |
| 624 | if (XGetFontProperty (xfont, XA_FONT, &value)) |
| 625 | { |
| 626 | char *full_name = NULL, *p0, *p; |
| 627 | int dashes = 0; |
| 628 | |
| 629 | p0 = p = (char *) XGetAtomName (FRAME_X_DISPLAY (f), (Atom) value);; |
| 630 | /* Count the number of dashes in the "full name". |
| 631 | If it is too few, this isn't really the font's full name, |
| 632 | so don't use it. |
| 633 | In X11R4, the fonts did not come with their canonical names |
| 634 | stored in them. */ |
| 635 | while (*p) |
| 636 | { |
| 637 | if (*p == '-') |
| 638 | dashes++; |
| 639 | p++; |
| 640 | } |
| 641 | |
| 642 | if (dashes >= 13) |
| 643 | { |
| 644 | full_name = (char *) malloc (p - p0 + 1); |
| 645 | if (full_name) |
| 646 | bcopy (p0, full_name, p - p0 + 1); |
| 647 | } |
| 648 | XFree (p0); |
| 649 | |
| 650 | if (full_name) |
| 651 | font->font.full_name = full_name; |
| 652 | else |
| 653 | font->font.full_name = font->font.name; |
| 654 | } |
| 655 | font->file_name = NULL; |
| 656 | |
| 657 | font->font.size = xfont->max_bounds.width; |
| 658 | font->font.height = xfont->ascent + xfont->descent; |
| 659 | font->font.baseline_offset |
| 660 | = (XGetFontProperty (xfont, dpyinfo->Xatom_MULE_BASELINE_OFFSET, &value) |
| 661 | ? (long) value : 0); |
| 662 | font->font.relative_compose |
| 663 | = (XGetFontProperty (xfont, dpyinfo->Xatom_MULE_RELATIVE_COMPOSE, &value) |
| 664 | ? (long) value : 0); |
| 665 | font->font.default_ascent |
| 666 | = (XGetFontProperty (xfont, dpyinfo->Xatom_MULE_DEFAULT_ASCENT, &value) |
| 667 | ? (long) value : 0); |
| 668 | font->font.vertical_centering |
| 669 | = (STRINGP (Vvertical_centering_font_regexp) |
| 670 | && (fast_c_string_match_ignore_case |
| 671 | (Vvertical_centering_font_regexp, font->font.full_name) >= 0)); |
| 672 | |
| 673 | UNBLOCK_INPUT; |
| 674 | |
| 675 | dpyinfo->n_fonts++; |
| 676 | |
| 677 | /* Set global flag fonts_changed_p to non-zero if the font loaded |
| 678 | has a character with a smaller width than any other character |
| 679 | before, or if the font loaded has a smaller height than any other |
| 680 | font loaded before. If this happens, it will make a glyph matrix |
| 681 | reallocation necessary. */ |
| 682 | if (dpyinfo->n_fonts == 1) |
| 683 | { |
| 684 | dpyinfo->smallest_font_height = font->font.height; |
| 685 | dpyinfo->smallest_char_width = font->min_width; |
| 686 | fonts_changed_p = 1; |
| 687 | } |
| 688 | else |
| 689 | { |
| 690 | if (dpyinfo->smallest_font_height > font->font.height) |
| 691 | dpyinfo->smallest_font_height = font->font.height, fonts_changed_p |= 1; |
| 692 | if (dpyinfo->smallest_char_width > font->min_width) |
| 693 | dpyinfo->smallest_char_width = font->min_width, fonts_changed_p |= 1; |
| 694 | } |
| 695 | |
| 696 | return font; |
| 697 | } |
| 698 | |
| 699 | static void |
| 700 | xfont_close (f, font) |
| 701 | FRAME_PTR f; |
| 702 | struct font *font; |
| 703 | { |
| 704 | BLOCK_INPUT; |
| 705 | XFreeFont (FRAME_X_DISPLAY (f), font->font.font); |
| 706 | UNBLOCK_INPUT; |
| 707 | |
| 708 | if (font->font.name != font->font.full_name) |
| 709 | free (font->font.full_name); |
| 710 | free (font->font.name); |
| 711 | free (font); |
| 712 | FRAME_X_DISPLAY_INFO (f)->n_fonts--; |
| 713 | } |
| 714 | |
| 715 | static int |
| 716 | xfont_prepare_face (f, face) |
| 717 | FRAME_PTR f; |
| 718 | struct face *face; |
| 719 | { |
| 720 | BLOCK_INPUT; |
| 721 | XSetFont (FRAME_X_DISPLAY (f), face->gc, face->font->fid); |
| 722 | UNBLOCK_INPUT; |
| 723 | |
| 724 | return 0; |
| 725 | } |
| 726 | |
| 727 | #if 0 |
| 728 | static void |
| 729 | xfont_done_face (f, face) |
| 730 | FRAME_PTR f; |
| 731 | struct face *face; |
| 732 | { |
| 733 | if (face->extra) |
| 734 | { |
| 735 | BLOCK_INPUT; |
| 736 | XFreeGC (FRAME_X_DISPLAY (f), (GC) face->extra); |
| 737 | UNBLOCK_INPUT; |
| 738 | face->extra = NULL; |
| 739 | } |
| 740 | } |
| 741 | #endif /* 0 */ |
| 742 | |
| 743 | static int |
| 744 | xfont_has_char (entity, c) |
| 745 | Lisp_Object entity; |
| 746 | int c; |
| 747 | { |
| 748 | Lisp_Object registry = AREF (entity, FONT_REGISTRY_INDEX); |
| 749 | struct charset *repertory; |
| 750 | |
| 751 | if (xfont_registry_charsets (registry, NULL, &repertory) < 0) |
| 752 | return -1; |
| 753 | if (! repertory) |
| 754 | return -1; |
| 755 | return (ENCODE_CHAR (repertory, c) != CHARSET_INVALID_CODE (repertory)); |
| 756 | } |
| 757 | |
| 758 | static unsigned |
| 759 | xfont_encode_char (font, c) |
| 760 | struct font *font; |
| 761 | int c; |
| 762 | { |
| 763 | struct charset *charset; |
| 764 | unsigned code; |
| 765 | XChar2b char2b; |
| 766 | |
| 767 | charset = CHARSET_FROM_ID (font->encoding_charset); |
| 768 | code = ENCODE_CHAR (charset, c); |
| 769 | if (code == CHARSET_INVALID_CODE (charset)) |
| 770 | return 0xFFFFFFFF; |
| 771 | if (font->repertory_charet >= 0) |
| 772 | { |
| 773 | charset = CHARSET_FROM_ID (font->repertory_charet); |
| 774 | return (ENCODE_CHAR (charset, c) != CHARSET_INVALID_CODE (charset) |
| 775 | ? code : 0xFFFFFFFF); |
| 776 | } |
| 777 | char2b.byte1 = code >> 8; |
| 778 | char2b.byte2 = code & 0xFF; |
| 779 | return (xfont_get_pcm (font->font.font, &char2b) ? code : 0xFFFFFFFF); |
| 780 | } |
| 781 | |
| 782 | static int |
| 783 | xfont_text_extents (font, code, nglyphs, metrics) |
| 784 | struct font *font; |
| 785 | unsigned *code; |
| 786 | int nglyphs; |
| 787 | struct font_metrics *metrics; |
| 788 | { |
| 789 | int width = 0; |
| 790 | int i, x; |
| 791 | |
| 792 | if (metrics) |
| 793 | bzero (metrics, sizeof (struct font_metrics)); |
| 794 | for (i = 0, x = 0; i < nglyphs; i++) |
| 795 | { |
| 796 | XChar2b char2b; |
| 797 | static XCharStruct *pcm; |
| 798 | |
| 799 | if (code[i] >= 0x10000) |
| 800 | continue; |
| 801 | char2b.byte1 = code[i] >> 8, char2b.byte2 = code[i] & 0xFF; |
| 802 | pcm = xfont_get_pcm (font->font.font, &char2b); |
| 803 | if (! pcm) |
| 804 | continue; |
| 805 | if (metrics->lbearing > width + pcm->lbearing) |
| 806 | metrics->lbearing = width + pcm->lbearing; |
| 807 | if (metrics->rbearing < width + pcm->rbearing) |
| 808 | metrics->rbearing = width + pcm->rbearing; |
| 809 | if (metrics->ascent < pcm->ascent) |
| 810 | metrics->ascent = pcm->ascent; |
| 811 | if (metrics->descent < pcm->descent) |
| 812 | metrics->descent = pcm->descent; |
| 813 | width += pcm->width; |
| 814 | } |
| 815 | if (metrics) |
| 816 | metrics->width = width; |
| 817 | return width; |
| 818 | } |
| 819 | |
| 820 | static int |
| 821 | xfont_draw (s, from, to, x, y, with_background) |
| 822 | struct glyph_string *s; |
| 823 | int from, to, x, y, with_background; |
| 824 | { |
| 825 | XFontStruct *xfont = s->face->font; |
| 826 | int len = to - from; |
| 827 | |
| 828 | if (xfont->min_byte1 == 0 && xfont->max_byte1 == 0) |
| 829 | { |
| 830 | char *str; |
| 831 | int i; |
| 832 | USE_SAFE_ALLOCA; |
| 833 | |
| 834 | SAFE_ALLOCA (str, char *, len); |
| 835 | for (i = 0; i < len ; i++) |
| 836 | str[i] = XCHAR2B_BYTE2 (s->char2b + from + i); |
| 837 | if (with_background > 0) |
| 838 | XDrawImageString (FRAME_X_DISPLAY (s->f), FRAME_X_WINDOW (s->f), |
| 839 | s->gc, x, y, str, len); |
| 840 | else |
| 841 | XDrawString (FRAME_X_DISPLAY (s->f), FRAME_X_WINDOW (s->f), |
| 842 | s->gc, x, y, str, len); |
| 843 | SAFE_FREE (); |
| 844 | return s->nchars; |
| 845 | } |
| 846 | |
| 847 | if (with_background > 0) |
| 848 | XDrawImageString16 (FRAME_X_DISPLAY (s->f), FRAME_X_WINDOW (s->f), |
| 849 | s->gc, x, y, s->char2b + from, len); |
| 850 | else |
| 851 | XDrawString16 (FRAME_X_DISPLAY (s->f), FRAME_X_WINDOW (s->f), |
| 852 | s->gc, x, y, s->char2b + from, len); |
| 853 | |
| 854 | return len; |
| 855 | } |
| 856 | |
| 857 | |
| 858 | \f |
| 859 | void |
| 860 | syms_of_xfont () |
| 861 | { |
| 862 | staticpro (&x_font_charset_alist); |
| 863 | x_font_charset_alist = Qnil; |
| 864 | |
| 865 | DEFSYM (Qx, "x"); |
| 866 | xfont_driver.type = Qx; |
| 867 | register_font_driver (&xfont_driver, NULL); |
| 868 | } |
| 869 | |
| 870 | /* arch-tag: 23c5f366-a5ee-44b7-a3b7-90d6da7fd749 |
| 871 | (do not change this comment) */ |