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c2f5bfd6 | 1 | /* xfont.c -- X core font driver. |
77ad4cfe GM |
2 | Copyright (C) 2006, 2007, 2008 Free Software Foundation, Inc. |
3 | Copyright (C) 2006, 2007, 2008 | |
c2f5bfd6 KH |
4 | National Institute of Advanced Industrial Science and Technology (AIST) |
5 | Registration Number H13PRO009 | |
6 | ||
7 | This file is part of GNU Emacs. | |
8 | ||
9ec0b715 | 9 | GNU Emacs is free software: you can redistribute it and/or modify |
c2f5bfd6 | 10 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
11 | the Free Software Foundation, either version 3 of the License, or |
12 | (at your option) any later version. | |
c2f5bfd6 KH |
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 | |
9ec0b715 | 20 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
c2f5bfd6 KH |
21 | |
22 | #include <config.h> | |
23 | #include <stdio.h> | |
f0c55750 | 24 | #include <stdlib.h> |
c2f5bfd6 KH |
25 | #include <X11/Xlib.h> |
26 | ||
27 | #include "lisp.h" | |
28 | #include "dispextern.h" | |
29 | #include "xterm.h" | |
30 | #include "frame.h" | |
31 | #include "blockinput.h" | |
32 | #include "character.h" | |
33 | #include "charset.h" | |
34 | #include "fontset.h" | |
35 | #include "font.h" | |
f0c55750 | 36 | #include "ccl.h" |
c2f5bfd6 KH |
37 | |
38 | \f | |
39 | /* X core font driver. */ | |
40 | ||
f0c55750 KH |
41 | struct xfont_info |
42 | { | |
43 | struct font font; | |
44 | Display *display; | |
45 | XFontStruct *xfont; | |
46 | }; | |
47 | ||
c2f5bfd6 KH |
48 | /* Prototypes of support functions. */ |
49 | extern void x_clear_errors P_ ((Display *)); | |
50 | ||
c2f5bfd6 | 51 | static XCharStruct *xfont_get_pcm P_ ((XFontStruct *, XChar2b *)); |
f0c55750 | 52 | static void xfont_find_ccl_program P_ ((struct font *)); |
c2f5bfd6 KH |
53 | |
54 | /* Get metrics of character CHAR2B in XFONT. Value is null if CHAR2B | |
55 | is not contained in the font. */ | |
56 | ||
57 | static XCharStruct * | |
58 | xfont_get_pcm (xfont, char2b) | |
59 | XFontStruct *xfont; | |
60 | XChar2b *char2b; | |
61 | { | |
62 | /* The result metric information. */ | |
63 | XCharStruct *pcm = NULL; | |
64 | ||
960d80b9 | 65 | font_assert (xfont && char2b); |
c2f5bfd6 KH |
66 | |
67 | if (xfont->per_char != NULL) | |
68 | { | |
69 | if (xfont->min_byte1 == 0 && xfont->max_byte1 == 0) | |
70 | { | |
71 | /* min_char_or_byte2 specifies the linear character index | |
72 | corresponding to the first element of the per_char array, | |
73 | max_char_or_byte2 is the index of the last character. A | |
74 | character with non-zero CHAR2B->byte1 is not in the font. | |
75 | A character with byte2 less than min_char_or_byte2 or | |
76 | greater max_char_or_byte2 is not in the font. */ | |
77 | if (char2b->byte1 == 0 | |
78 | && char2b->byte2 >= xfont->min_char_or_byte2 | |
79 | && char2b->byte2 <= xfont->max_char_or_byte2) | |
80 | pcm = xfont->per_char + char2b->byte2 - xfont->min_char_or_byte2; | |
81 | } | |
82 | else | |
83 | { | |
84 | /* If either min_byte1 or max_byte1 are nonzero, both | |
85 | min_char_or_byte2 and max_char_or_byte2 are less than | |
86 | 256, and the 2-byte character index values corresponding | |
87 | to the per_char array element N (counting from 0) are: | |
88 | ||
89 | byte1 = N/D + min_byte1 | |
90 | byte2 = N\D + min_char_or_byte2 | |
91 | ||
92 | where: | |
93 | ||
94 | D = max_char_or_byte2 - min_char_or_byte2 + 1 | |
95 | / = integer division | |
96 | \ = integer modulus */ | |
97 | if (char2b->byte1 >= xfont->min_byte1 | |
98 | && char2b->byte1 <= xfont->max_byte1 | |
99 | && char2b->byte2 >= xfont->min_char_or_byte2 | |
100 | && char2b->byte2 <= xfont->max_char_or_byte2) | |
101 | pcm = (xfont->per_char | |
102 | + ((xfont->max_char_or_byte2 - xfont->min_char_or_byte2 + 1) | |
103 | * (char2b->byte1 - xfont->min_byte1)) | |
104 | + (char2b->byte2 - xfont->min_char_or_byte2)); | |
105 | } | |
106 | } | |
107 | else | |
108 | { | |
109 | /* If the per_char pointer is null, all glyphs between the first | |
110 | and last character indexes inclusive have the same | |
111 | information, as given by both min_bounds and max_bounds. */ | |
112 | if (char2b->byte2 >= xfont->min_char_or_byte2 | |
113 | && char2b->byte2 <= xfont->max_char_or_byte2) | |
114 | pcm = &xfont->max_bounds; | |
115 | } | |
116 | ||
117 | return ((pcm == NULL | |
118 | || (pcm->width == 0 && (pcm->rbearing - pcm->lbearing) == 0)) | |
119 | ? NULL : pcm); | |
120 | } | |
121 | ||
f0c55750 KH |
122 | /* Find a CCL program for a font specified by FONTP, and set the member |
123 | `encoder' of the structure. */ | |
124 | ||
125 | static void | |
126 | xfont_find_ccl_program (font) | |
127 | struct font *font; | |
128 | { | |
129 | Lisp_Object list, elt; | |
130 | ||
131 | elt = Qnil; | |
132 | for (list = Vfont_ccl_encoder_alist; CONSP (list); list = XCDR (list)) | |
133 | { | |
134 | elt = XCAR (list); | |
135 | if (CONSP (elt) | |
136 | && STRINGP (XCAR (elt)) | |
137 | && ((fast_string_match_ignore_case (XCAR (elt), | |
138 | font->props[FONT_NAME_INDEX]) | |
139 | >= 0) | |
140 | || (fast_string_match_ignore_case (XCAR (elt), | |
141 | font->props[FONT_FULLNAME_INDEX]) | |
142 | >= 0))) | |
143 | break; | |
144 | } | |
145 | ||
146 | if (! NILP (list)) | |
147 | { | |
148 | struct ccl_program *ccl | |
149 | = (struct ccl_program *) xmalloc (sizeof (struct ccl_program)); | |
150 | ||
151 | if (setup_ccl_program (ccl, XCDR (elt)) < 0) | |
152 | xfree (ccl); | |
153 | else | |
154 | font->font_encoder = ccl; | |
155 | } | |
156 | } | |
157 | ||
feb2737b | 158 | static Lisp_Object xfont_get_cache P_ ((FRAME_PTR)); |
c2f5bfd6 | 159 | static Lisp_Object xfont_list P_ ((Lisp_Object, Lisp_Object)); |
6e34c9c1 | 160 | static Lisp_Object xfont_match P_ ((Lisp_Object, Lisp_Object)); |
c2f5bfd6 | 161 | static Lisp_Object xfont_list_family P_ ((Lisp_Object)); |
f0c55750 | 162 | static Lisp_Object xfont_open P_ ((FRAME_PTR, Lisp_Object, int)); |
c2f5bfd6 KH |
163 | static void xfont_close P_ ((FRAME_PTR, struct font *)); |
164 | static int xfont_prepare_face P_ ((FRAME_PTR, struct face *)); | |
c2f5bfd6 KH |
165 | static int xfont_has_char P_ ((Lisp_Object, int)); |
166 | static unsigned xfont_encode_char P_ ((struct font *, int)); | |
167 | static int xfont_text_extents P_ ((struct font *, unsigned *, int, | |
168 | struct font_metrics *)); | |
169 | static int xfont_draw P_ ((struct glyph_string *, int, int, int, int, int)); | |
f0c55750 | 170 | static int xfont_check P_ ((FRAME_PTR, struct font *)); |
c2f5bfd6 KH |
171 | |
172 | struct font_driver xfont_driver = | |
173 | { | |
575abfb7 | 174 | 0, /* Qx */ |
f0c55750 | 175 | 0, /* case insensitive */ |
c2f5bfd6 | 176 | xfont_get_cache, |
c2f5bfd6 | 177 | xfont_list, |
6e34c9c1 | 178 | xfont_match, |
c2f5bfd6 KH |
179 | xfont_list_family, |
180 | NULL, | |
181 | xfont_open, | |
182 | xfont_close, | |
183 | xfont_prepare_face, | |
f0c55750 | 184 | NULL, |
c2f5bfd6 KH |
185 | xfont_has_char, |
186 | xfont_encode_char, | |
187 | xfont_text_extents, | |
f0c55750 KH |
188 | xfont_draw, |
189 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, | |
190 | xfont_check | |
c2f5bfd6 KH |
191 | }; |
192 | ||
193 | extern Lisp_Object QCname; | |
194 | ||
195 | static Lisp_Object | |
feb2737b KH |
196 | xfont_get_cache (f) |
197 | FRAME_PTR f; | |
c2f5bfd6 | 198 | { |
feb2737b | 199 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); |
c2f5bfd6 KH |
200 | |
201 | return (dpyinfo->name_list_element); | |
202 | } | |
203 | ||
c2f5bfd6 KH |
204 | extern Lisp_Object Vface_alternative_font_registry_alist; |
205 | ||
f0c55750 KH |
206 | static int |
207 | compare_font_names (const void *name1, const void *name2) | |
208 | { | |
61a540f5 | 209 | return xstricmp (*(const char **) name1, *(const char **) name2); |
f0c55750 KH |
210 | } |
211 | ||
212 | static Lisp_Object xfont_list_pattern P_ ((Lisp_Object, Display *, char *)); | |
213 | ||
c2f5bfd6 | 214 | static Lisp_Object |
6c4aeab6 KH |
215 | xfont_list_pattern (frame, display, pattern) |
216 | Lisp_Object frame; | |
217 | Display *display; | |
218 | char *pattern; | |
c2f5bfd6 | 219 | { |
6c4aeab6 KH |
220 | Lisp_Object list = Qnil; |
221 | int i, limit, num_fonts; | |
222 | char **names; | |
c2f5bfd6 KH |
223 | |
224 | BLOCK_INPUT; | |
6c4aeab6 | 225 | x_catch_errors (display); |
c2f5bfd6 | 226 | |
6c4aeab6 | 227 | for (limit = 512; ; limit *= 2) |
c2f5bfd6 | 228 | { |
6c4aeab6 KH |
229 | names = XListFonts (display, pattern, limit, &num_fonts); |
230 | if (x_had_errors_p (display)) | |
c2f5bfd6 KH |
231 | { |
232 | /* This error is perhaps due to insufficient memory on X | |
233 | server. Let's just ignore it. */ | |
6c4aeab6 KH |
234 | x_clear_errors (display); |
235 | num_fonts = 0; | |
236 | break; | |
c2f5bfd6 | 237 | } |
6c4aeab6 KH |
238 | if (num_fonts < limit) |
239 | break; | |
240 | XFreeFontNames (names); | |
241 | } | |
242 | ||
f0c55750 | 243 | if (num_fonts > 0) |
6c4aeab6 | 244 | { |
f0c55750 | 245 | char **indices = alloca (sizeof (char *) * num_fonts); |
6c4aeab6 | 246 | |
f0c55750 KH |
247 | for (i = 0; i < num_fonts; i++) |
248 | indices[i] = names[i]; | |
249 | qsort (indices, num_fonts, sizeof (char *), compare_font_names); | |
6c4aeab6 | 250 | |
f0c55750 | 251 | for (i = 0; i < num_fonts; i++) |
c2f5bfd6 | 252 | { |
f0c55750 KH |
253 | Lisp_Object entity; |
254 | int result; | |
6c4aeab6 | 255 | |
61a540f5 | 256 | if (i > 0 && xstricmp (indices[i - 1], indices[i]) == 0) |
6c4aeab6 | 257 | continue; |
6c4aeab6 | 258 | |
f0c55750 KH |
259 | entity = font_make_entity (); |
260 | ASET (entity, FONT_TYPE_INDEX, Qx); | |
6c4aeab6 | 261 | |
f0c55750 KH |
262 | result = font_parse_xlfd (indices[i], entity); |
263 | if (result < 0) | |
c2f5bfd6 | 264 | { |
f0c55750 KH |
265 | /* This may be an alias name. Try to get the full XLFD name |
266 | from XA_FONT property of the font. */ | |
267 | XFontStruct *font = XLoadQueryFont (display, indices[i]); | |
268 | unsigned long value; | |
269 | ||
270 | if (! font) | |
6c4aeab6 | 271 | continue; |
f0c55750 KH |
272 | if (XGetFontProperty (font, XA_FONT, &value)) |
273 | { | |
274 | char *name = (char *) XGetAtomName (display, (Atom) value); | |
275 | int len = strlen (name); | |
276 | ||
277 | /* If DXPC (a Differential X Protocol Compressor) | |
278 | Ver.3.7 is running, XGetAtomName will return null | |
279 | string. We must avoid such a name. */ | |
280 | if (len > 0) | |
281 | result = font_parse_xlfd (name, entity); | |
282 | XFree (name); | |
283 | } | |
284 | XFreeFont (display, font); | |
c2f5bfd6 | 285 | } |
f0c55750 KH |
286 | |
287 | if (result == 0 | |
288 | /* Avoid auto-scaled fonts. */ | |
289 | && (XINT (AREF (entity, FONT_DPI_INDEX)) == 0 | |
290 | || XINT (AREF (entity, FONT_AVGWIDTH_INDEX)) > 0)) | |
291 | list = Fcons (entity, list); | |
c2f5bfd6 KH |
292 | } |
293 | } | |
294 | ||
295 | x_uncatch_errors (); | |
296 | UNBLOCK_INPUT; | |
297 | ||
960d80b9 | 298 | font_add_log ("xfont-list", build_string (pattern), list); |
6c4aeab6 KH |
299 | return list; |
300 | } | |
c2f5bfd6 | 301 | |
6c4aeab6 KH |
302 | static Lisp_Object |
303 | xfont_list (frame, spec) | |
304 | Lisp_Object frame, spec; | |
305 | { | |
306 | FRAME_PTR f = XFRAME (frame); | |
307 | Display *display = FRAME_X_DISPLAY_INFO (f)->display; | |
960d80b9 | 308 | Lisp_Object registry, list, val, extra; |
6c4aeab6 KH |
309 | int len; |
310 | char name[256]; | |
311 | ||
312 | extra = AREF (spec, FONT_EXTRA_INDEX); | |
6c4aeab6 | 313 | if (CONSP (extra)) |
c2f5bfd6 | 314 | { |
6c4aeab6 KH |
315 | val = assq_no_quit (QCotf, extra); |
316 | if (! NILP (val)) | |
f0c55750 | 317 | return Qnil; |
6c4aeab6 KH |
318 | val = assq_no_quit (QCscript, extra); |
319 | if (! NILP (val)) | |
f0c55750 KH |
320 | return Qnil; |
321 | val = assq_no_quit (QClang, extra); | |
6c4aeab6 | 322 | if (! NILP (val)) |
f0c55750 | 323 | return Qnil; |
c2f5bfd6 | 324 | } |
6c4aeab6 | 325 | |
f0c55750 KH |
326 | registry = AREF (spec, FONT_REGISTRY_INDEX); |
327 | if (NILP (registry)) | |
328 | ASET (spec, FONT_REGISTRY_INDEX, Qiso8859_1); | |
329 | len = font_unparse_xlfd (spec, 0, name, 256); | |
330 | ASET (spec, FONT_REGISTRY_INDEX, registry); | |
331 | if (len < 0) | |
332 | return Qnil; | |
333 | list = xfont_list_pattern (frame, display, name); | |
334 | if (NILP (list) && NILP (registry)) | |
c2f5bfd6 | 335 | { |
f0c55750 KH |
336 | /* Try iso10646-1 */ |
337 | char *r = name + len - 9; /* 9 == strlen (iso8859-1) */ | |
338 | ||
339 | if (r - name + 10 < 256) /* 10 == strlen (iso10646-1) */ | |
6c4aeab6 | 340 | { |
f0c55750 KH |
341 | strcpy (r, "iso10646-1"); |
342 | list = xfont_list_pattern (frame, display, name); | |
343 | } | |
344 | } | |
345 | if (NILP (list) && ! NILP (registry)) | |
346 | { | |
347 | Lisp_Object alter; | |
6c4aeab6 | 348 | |
f0c55750 KH |
349 | if ((alter = Fassoc (SYMBOL_NAME (registry), |
350 | Vface_alternative_font_registry_alist), | |
351 | CONSP (alter))) | |
352 | { | |
353 | /* Pointer to REGISTRY-ENCODING field. */ | |
354 | char *r = name + len - SBYTES (SYMBOL_NAME (registry)); | |
355 | ||
356 | for (alter = XCDR (alter); CONSP (alter); alter = XCDR (alter)) | |
357 | if (STRINGP (XCAR (alter)) | |
358 | && ((r - name) + SBYTES (XCAR (alter))) < 256) | |
359 | { | |
360 | strcpy (r, (char *) SDATA (XCAR (alter))); | |
361 | list = xfont_list_pattern (frame, display, name); | |
362 | if (! NILP (list)) | |
363 | break; | |
364 | } | |
6c4aeab6 | 365 | } |
c2f5bfd6 | 366 | } |
c2f5bfd6 | 367 | |
f0c55750 | 368 | return list; |
c2f5bfd6 KH |
369 | } |
370 | ||
6e34c9c1 KH |
371 | static Lisp_Object |
372 | xfont_match (frame, spec) | |
373 | Lisp_Object frame, spec; | |
374 | { | |
375 | FRAME_PTR f = XFRAME (frame); | |
376 | Display *display = FRAME_X_DISPLAY_INFO (f)->display; | |
377 | Lisp_Object extra, val, entity; | |
f0c55750 | 378 | char buf[256], *name; |
6e34c9c1 KH |
379 | XFontStruct *xfont; |
380 | unsigned long value; | |
381 | ||
382 | extra = AREF (spec, FONT_EXTRA_INDEX); | |
383 | val = assq_no_quit (QCname, extra); | |
384 | if (! CONSP (val) || ! STRINGP (XCDR (val))) | |
f0c55750 KH |
385 | { |
386 | if (font_unparse_xlfd (spec, 0, buf, 256) < 0) | |
387 | return Qnil; | |
388 | name = buf; | |
389 | } | |
390 | else | |
391 | name = (char *) SDATA (XCDR (val)); | |
6e34c9c1 | 392 | |
9c6d1df5 | 393 | BLOCK_INPUT; |
6e34c9c1 | 394 | entity = Qnil; |
6e34c9c1 KH |
395 | xfont = XLoadQueryFont (display, name); |
396 | if (xfont) | |
397 | { | |
398 | if (XGetFontProperty (xfont, XA_FONT, &value)) | |
399 | { | |
400 | int len; | |
401 | ||
402 | name = (char *) XGetAtomName (display, (Atom) value); | |
403 | len = strlen (name); | |
404 | ||
405 | /* If DXPC (a Differential X Protocol Compressor) | |
406 | Ver.3.7 is running, XGetAtomName will return null | |
407 | string. We must avoid such a name. */ | |
408 | if (len > 0) | |
409 | { | |
f0c55750 | 410 | entity = font_make_entity (); |
6e34c9c1 | 411 | ASET (entity, FONT_TYPE_INDEX, Qx); |
6e34c9c1 KH |
412 | if (font_parse_xlfd (name, entity) < 0) |
413 | entity = Qnil; | |
414 | } | |
415 | XFree (name); | |
416 | } | |
417 | XFreeFont (display, xfont); | |
418 | } | |
9c6d1df5 | 419 | UNBLOCK_INPUT; |
6e34c9c1 | 420 | |
960d80b9 | 421 | font_add_log ("xfont-match", spec, entity); |
6e34c9c1 KH |
422 | return entity; |
423 | } | |
424 | ||
c2f5bfd6 KH |
425 | static Lisp_Object |
426 | xfont_list_family (frame) | |
9df50a31 | 427 | Lisp_Object frame; |
c2f5bfd6 KH |
428 | { |
429 | FRAME_PTR f = XFRAME (frame); | |
430 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); | |
431 | char **names; | |
432 | int num_fonts, i; | |
433 | Lisp_Object list; | |
434 | char *last_family; | |
435 | int last_len; | |
436 | ||
437 | BLOCK_INPUT; | |
438 | x_catch_errors (dpyinfo->display); | |
439 | names = XListFonts (dpyinfo->display, "-*-*-*-*-*-*-*-*-*-*-*-*-*-*", | |
440 | 0x8000, &num_fonts); | |
441 | if (x_had_errors_p (dpyinfo->display)) | |
442 | { | |
443 | /* This error is perhaps due to insufficient memory on X server. | |
444 | Let's just ignore it. */ | |
445 | x_clear_errors (dpyinfo->display); | |
446 | num_fonts = 0; | |
447 | } | |
448 | ||
449 | list = Qnil; | |
450 | for (i = 0, last_len = 0; i < num_fonts; i++) | |
451 | { | |
452 | char *p0 = names[i], *p1; | |
453 | Lisp_Object family; | |
454 | ||
455 | p0++; /* skip the leading '-' */ | |
456 | while (*p0 && *p0 != '-') p0++; /* skip foundry */ | |
457 | if (! *p0) | |
458 | continue; | |
459 | p1 = ++p0; | |
460 | while (*p1 && *p1 != '-') p1++; /* find the end of family */ | |
461 | if (! *p1 || p1 == p0) | |
462 | continue; | |
463 | if (last_len == p1 - p0 | |
464 | && bcmp (last_family, p0, last_len) == 0) | |
465 | continue; | |
466 | last_len = p1 - p0; | |
467 | last_family = p0; | |
f0c55750 KH |
468 | family = make_unibyte_string (p0, last_len); |
469 | if (NILP (Fassoc_string (family, list, Qt))) | |
c2f5bfd6 KH |
470 | list = Fcons (family, list); |
471 | } | |
472 | ||
473 | XFreeFontNames (names); | |
474 | x_uncatch_errors (); | |
475 | UNBLOCK_INPUT; | |
476 | ||
477 | return list; | |
478 | } | |
479 | ||
f0c55750 KH |
480 | extern Lisp_Object QCavgwidth; |
481 | ||
482 | static Lisp_Object | |
c2f5bfd6 KH |
483 | xfont_open (f, entity, pixel_size) |
484 | FRAME_PTR f; | |
485 | Lisp_Object entity; | |
486 | int pixel_size; | |
487 | { | |
488 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); | |
489 | Display *display = dpyinfo->display; | |
490 | char name[256]; | |
491 | int len; | |
492 | unsigned long value; | |
493 | Lisp_Object registry; | |
494 | struct charset *encoding, *repertory; | |
f0c55750 | 495 | Lisp_Object font_object, fullname; |
c2f5bfd6 KH |
496 | struct font *font; |
497 | XFontStruct *xfont; | |
f0c55750 | 498 | int i; |
c2f5bfd6 KH |
499 | |
500 | /* At first, check if we know how to encode characters for this | |
501 | font. */ | |
502 | registry = AREF (entity, FONT_REGISTRY_INDEX); | |
a9822ae8 | 503 | if (font_registry_charsets (registry, &encoding, &repertory) < 0) |
f0c55750 | 504 | return Qnil; |
c2f5bfd6 KH |
505 | |
506 | if (XINT (AREF (entity, FONT_SIZE_INDEX)) != 0) | |
507 | pixel_size = XINT (AREF (entity, FONT_SIZE_INDEX)); | |
f0c55750 KH |
508 | else if (pixel_size == 0) |
509 | { | |
510 | if (FRAME_FONT (f)) | |
511 | pixel_size = FRAME_FONT (f)->pixel_size; | |
512 | else | |
513 | pixel_size = 14; | |
514 | } | |
c2f5bfd6 KH |
515 | len = font_unparse_xlfd (entity, pixel_size, name, 256); |
516 | if (len <= 0) | |
f0c55750 | 517 | return Qnil; |
c2f5bfd6 KH |
518 | |
519 | BLOCK_INPUT; | |
520 | x_catch_errors (display); | |
521 | xfont = XLoadQueryFont (display, name); | |
522 | if (x_had_errors_p (display)) | |
523 | { | |
524 | /* This error is perhaps due to insufficient memory on X server. | |
525 | Let's just ignore it. */ | |
526 | x_clear_errors (display); | |
527 | xfont = NULL; | |
528 | } | |
f0c55750 KH |
529 | fullname = Qnil; |
530 | /* Try to get the full name of FONT. */ | |
531 | if (xfont && XGetFontProperty (xfont, XA_FONT, &value)) | |
532 | { | |
533 | char *p0, *p; | |
534 | int dashes = 0; | |
535 | ||
536 | p0 = p = (char *) XGetAtomName (FRAME_X_DISPLAY (f), (Atom) value);; | |
537 | /* Count the number of dashes in the "full name". | |
538 | If it is too few, this isn't really the font's full name, | |
539 | so don't use it. | |
540 | In X11R4, the fonts did not come with their canonical names | |
541 | stored in them. */ | |
542 | while (*p) | |
543 | { | |
544 | if (*p == '-') | |
545 | dashes++; | |
546 | p++; | |
547 | } | |
548 | ||
549 | if (dashes >= 13) | |
550 | fullname = Fdowncase (make_unibyte_string (p0, p - p0)); | |
551 | XFree (p0); | |
552 | } | |
c2f5bfd6 KH |
553 | x_uncatch_errors (); |
554 | UNBLOCK_INPUT; | |
555 | ||
556 | if (! xfont) | |
f0c55750 KH |
557 | return Qnil; |
558 | ||
559 | font_object = font_make_object (VECSIZE (struct xfont_info)); | |
560 | ASET (font_object, FONT_TYPE_INDEX, Qx); | |
561 | if (STRINGP (fullname)) | |
960d80b9 | 562 | font_parse_xlfd ((char *) SDATA (fullname), font_object); |
f0c55750 KH |
563 | for (i = 1; i < FONT_ENTITY_MAX; i++) |
564 | ASET (font_object, i, AREF (entity, i)); | |
565 | ASET (font_object, FONT_SIZE_INDEX, make_number (pixel_size)); | |
566 | if (STRINGP (fullname)) | |
567 | ASET (font_object, FONT_NAME_INDEX, fullname); | |
568 | else | |
569 | ASET (font_object, FONT_NAME_INDEX, make_unibyte_string (name, len)); | |
570 | ASET (font_object, FONT_FULLNAME_INDEX, fullname); | |
571 | ASET (font_object, FONT_FILE_INDEX, Qnil); | |
572 | ASET (font_object, FONT_FORMAT_INDEX, Qx); | |
573 | font = XFONT_OBJECT (font_object); | |
574 | ((struct xfont_info *) font)->xfont = xfont; | |
575 | ((struct xfont_info *) font)->display = FRAME_X_DISPLAY (f); | |
c2f5bfd6 KH |
576 | font->pixel_size = pixel_size; |
577 | font->driver = &xfont_driver; | |
c2f5bfd6 | 578 | font->encoding_charset = encoding->id; |
1886668d | 579 | font->repertory_charset = repertory ? repertory->id : -1; |
c2f5bfd6 KH |
580 | font->ascent = xfont->ascent; |
581 | font->descent = xfont->descent; | |
f0c55750 KH |
582 | font->height = font->ascent + font->descent; |
583 | font->min_width = xfont->min_bounds.width; | |
c2f5bfd6 KH |
584 | if (xfont->min_bounds.width == xfont->max_bounds.width) |
585 | { | |
586 | /* Fixed width font. */ | |
f0c55750 | 587 | font->average_width = font->space_width = xfont->min_bounds.width; |
c2f5bfd6 KH |
588 | } |
589 | else | |
590 | { | |
c2f5bfd6 | 591 | XCharStruct *pcm; |
f0c55750 KH |
592 | XChar2b char2b; |
593 | Lisp_Object val; | |
c2f5bfd6 KH |
594 | |
595 | char2b.byte1 = 0x00, char2b.byte2 = 0x20; | |
596 | pcm = xfont_get_pcm (xfont, &char2b); | |
597 | if (pcm) | |
f0c55750 | 598 | font->space_width = pcm->width; |
c2f5bfd6 | 599 | else |
f0c55750 KH |
600 | font->space_width = 0; |
601 | ||
602 | val = Ffont_get (font_object, QCavgwidth); | |
603 | if (INTEGERP (val)) | |
604 | font->average_width = XINT (val); | |
605 | if (font->average_width < 0) | |
606 | font->average_width = - font->average_width; | |
607 | if (font->average_width == 0 | |
608 | && encoding->ascii_compatible_p) | |
c2f5bfd6 | 609 | { |
f0c55750 | 610 | int width = font->space_width, n = pcm != NULL; |
c2f5bfd6 | 611 | |
f0c55750 KH |
612 | for (char2b.byte2 = 33; char2b.byte2 <= 126; char2b.byte2++) |
613 | if ((pcm = xfont_get_pcm (xfont, &char2b)) != NULL) | |
614 | width += pcm->width, n++; | |
615 | font->average_width = width / n; | |
c2f5bfd6 | 616 | } |
c2f5bfd6 | 617 | } |
c2f5bfd6 | 618 | |
f0c55750 KH |
619 | BLOCK_INPUT; |
620 | font->underline_thickness | |
621 | = (XGetFontProperty (xfont, XA_UNDERLINE_THICKNESS, &value) | |
622 | ? (long) value : 0); | |
623 | font->underline_position | |
624 | = (XGetFontProperty (xfont, XA_UNDERLINE_POSITION, &value) | |
625 | ? (long) value : -1); | |
626 | font->baseline_offset | |
c2f5bfd6 KH |
627 | = (XGetFontProperty (xfont, dpyinfo->Xatom_MULE_BASELINE_OFFSET, &value) |
628 | ? (long) value : 0); | |
f0c55750 | 629 | font->relative_compose |
c2f5bfd6 KH |
630 | = (XGetFontProperty (xfont, dpyinfo->Xatom_MULE_RELATIVE_COMPOSE, &value) |
631 | ? (long) value : 0); | |
f0c55750 | 632 | font->default_ascent |
c2f5bfd6 KH |
633 | = (XGetFontProperty (xfont, dpyinfo->Xatom_MULE_DEFAULT_ASCENT, &value) |
634 | ? (long) value : 0); | |
c2f5bfd6 KH |
635 | UNBLOCK_INPUT; |
636 | ||
f0c55750 KH |
637 | if (NILP (fullname)) |
638 | fullname = AREF (font_object, FONT_NAME_INDEX); | |
639 | font->vertical_centering | |
640 | = (STRINGP (Vvertical_centering_font_regexp) | |
641 | && (fast_string_match_ignore_case | |
642 | (Vvertical_centering_font_regexp, fullname) >= 0)); | |
c2f5bfd6 | 643 | |
f0c55750 | 644 | return font_object; |
c2f5bfd6 KH |
645 | } |
646 | ||
647 | static void | |
648 | xfont_close (f, font) | |
649 | FRAME_PTR f; | |
650 | struct font *font; | |
651 | { | |
652 | BLOCK_INPUT; | |
f0c55750 | 653 | XFreeFont (FRAME_X_DISPLAY (f), ((struct xfont_info *) font)->xfont); |
c2f5bfd6 | 654 | UNBLOCK_INPUT; |
c2f5bfd6 KH |
655 | } |
656 | ||
657 | static int | |
658 | xfont_prepare_face (f, face) | |
659 | FRAME_PTR f; | |
660 | struct face *face; | |
661 | { | |
662 | BLOCK_INPUT; | |
f0c55750 KH |
663 | XSetFont (FRAME_X_DISPLAY (f), face->gc, |
664 | ((struct xfont_info *) face->font)->xfont->fid); | |
c2f5bfd6 KH |
665 | UNBLOCK_INPUT; |
666 | ||
667 | return 0; | |
668 | } | |
669 | ||
c2f5bfd6 KH |
670 | static int |
671 | xfont_has_char (entity, c) | |
672 | Lisp_Object entity; | |
673 | int c; | |
674 | { | |
675 | Lisp_Object registry = AREF (entity, FONT_REGISTRY_INDEX); | |
676 | struct charset *repertory; | |
677 | ||
a9822ae8 | 678 | if (font_registry_charsets (registry, NULL, &repertory) < 0) |
c2f5bfd6 KH |
679 | return -1; |
680 | if (! repertory) | |
681 | return -1; | |
682 | return (ENCODE_CHAR (repertory, c) != CHARSET_INVALID_CODE (repertory)); | |
683 | } | |
684 | ||
685 | static unsigned | |
686 | xfont_encode_char (font, c) | |
687 | struct font *font; | |
688 | int c; | |
689 | { | |
f0c55750 | 690 | XFontStruct *xfont = ((struct xfont_info *) font)->xfont; |
c2f5bfd6 KH |
691 | struct charset *charset; |
692 | unsigned code; | |
693 | XChar2b char2b; | |
694 | ||
695 | charset = CHARSET_FROM_ID (font->encoding_charset); | |
696 | code = ENCODE_CHAR (charset, c); | |
697 | if (code == CHARSET_INVALID_CODE (charset)) | |
21138cff | 698 | return FONT_INVALID_CODE; |
1886668d | 699 | if (font->repertory_charset >= 0) |
c2f5bfd6 | 700 | { |
1886668d | 701 | charset = CHARSET_FROM_ID (font->repertory_charset); |
c2f5bfd6 | 702 | return (ENCODE_CHAR (charset, c) != CHARSET_INVALID_CODE (charset) |
21138cff | 703 | ? code : FONT_INVALID_CODE); |
c2f5bfd6 | 704 | } |
88649c62 KH |
705 | char2b.byte1 = code >> 8; |
706 | char2b.byte2 = code & 0xFF; | |
f0c55750 | 707 | return (xfont_get_pcm (xfont, &char2b) ? code : FONT_INVALID_CODE); |
c2f5bfd6 KH |
708 | } |
709 | ||
710 | static int | |
711 | xfont_text_extents (font, code, nglyphs, metrics) | |
712 | struct font *font; | |
713 | unsigned *code; | |
714 | int nglyphs; | |
715 | struct font_metrics *metrics; | |
716 | { | |
f0c55750 | 717 | XFontStruct *xfont = ((struct xfont_info *) font)->xfont; |
c2f5bfd6 KH |
718 | int width = 0; |
719 | int i, x; | |
720 | ||
721 | if (metrics) | |
722 | bzero (metrics, sizeof (struct font_metrics)); | |
723 | for (i = 0, x = 0; i < nglyphs; i++) | |
724 | { | |
725 | XChar2b char2b; | |
726 | static XCharStruct *pcm; | |
727 | ||
728 | if (code[i] >= 0x10000) | |
729 | continue; | |
730 | char2b.byte1 = code[i] >> 8, char2b.byte2 = code[i] & 0xFF; | |
f0c55750 | 731 | pcm = xfont_get_pcm (xfont, &char2b); |
c2f5bfd6 KH |
732 | if (! pcm) |
733 | continue; | |
734 | if (metrics->lbearing > width + pcm->lbearing) | |
735 | metrics->lbearing = width + pcm->lbearing; | |
736 | if (metrics->rbearing < width + pcm->rbearing) | |
737 | metrics->rbearing = width + pcm->rbearing; | |
738 | if (metrics->ascent < pcm->ascent) | |
739 | metrics->ascent = pcm->ascent; | |
740 | if (metrics->descent < pcm->descent) | |
741 | metrics->descent = pcm->descent; | |
742 | width += pcm->width; | |
743 | } | |
744 | if (metrics) | |
745 | metrics->width = width; | |
746 | return width; | |
747 | } | |
748 | ||
749 | static int | |
750 | xfont_draw (s, from, to, x, y, with_background) | |
751 | struct glyph_string *s; | |
752 | int from, to, x, y, with_background; | |
753 | { | |
f0c55750 | 754 | XFontStruct *xfont = ((struct xfont_info *) s->font)->xfont; |
c2f5bfd6 | 755 | int len = to - from; |
6e34c9c1 | 756 | GC gc = s->gc; |
298fd5b1 | 757 | int i; |
6e34c9c1 | 758 | |
f0c55750 | 759 | if (s->gc != s->face->gc) |
6e34c9c1 | 760 | { |
d45fefc7 | 761 | BLOCK_INPUT; |
f0c55750 | 762 | XSetFont (s->display, gc, xfont->fid); |
d45fefc7 | 763 | UNBLOCK_INPUT; |
6e34c9c1 | 764 | } |
c2f5bfd6 KH |
765 | |
766 | if (xfont->min_byte1 == 0 && xfont->max_byte1 == 0) | |
767 | { | |
768 | char *str; | |
c2f5bfd6 KH |
769 | USE_SAFE_ALLOCA; |
770 | ||
771 | SAFE_ALLOCA (str, char *, len); | |
772 | for (i = 0; i < len ; i++) | |
773 | str[i] = XCHAR2B_BYTE2 (s->char2b + from + i); | |
d45fefc7 | 774 | BLOCK_INPUT; |
c2f5bfd6 | 775 | if (with_background > 0) |
298fd5b1 KH |
776 | { |
777 | if (s->padding_p) | |
778 | for (i = 0; i < len; i++) | |
779 | XDrawImageString (FRAME_X_DISPLAY (s->f), FRAME_X_WINDOW (s->f), | |
780 | gc, x + i, y, str + i, 1); | |
781 | else | |
782 | XDrawImageString (FRAME_X_DISPLAY (s->f), FRAME_X_WINDOW (s->f), | |
783 | gc, x, y, str, len); | |
784 | } | |
c2f5bfd6 | 785 | else |
298fd5b1 KH |
786 | { |
787 | if (s->padding_p) | |
788 | for (i = 0; i < len; i++) | |
789 | XDrawString (FRAME_X_DISPLAY (s->f), FRAME_X_WINDOW (s->f), | |
790 | gc, x + i, y, str + i, 1); | |
791 | else | |
792 | XDrawString (FRAME_X_DISPLAY (s->f), FRAME_X_WINDOW (s->f), | |
793 | gc, x, y, str, len); | |
794 | } | |
d45fefc7 | 795 | UNBLOCK_INPUT; |
c2f5bfd6 KH |
796 | SAFE_FREE (); |
797 | return s->nchars; | |
798 | } | |
799 | ||
d45fefc7 | 800 | BLOCK_INPUT; |
c2f5bfd6 | 801 | if (with_background > 0) |
298fd5b1 KH |
802 | { |
803 | if (s->padding_p) | |
804 | for (i = 0; i < len; i++) | |
805 | XDrawImageString16 (FRAME_X_DISPLAY (s->f), FRAME_X_WINDOW (s->f), | |
806 | gc, x + i, y, s->char2b + from + i, 1); | |
807 | else | |
808 | XDrawImageString16 (FRAME_X_DISPLAY (s->f), FRAME_X_WINDOW (s->f), | |
809 | gc, x, y, s->char2b + from, len); | |
810 | } | |
c2f5bfd6 | 811 | else |
298fd5b1 KH |
812 | { |
813 | if (s->padding_p) | |
814 | for (i = 0; i < len; i++) | |
815 | XDrawString16 (FRAME_X_DISPLAY (s->f), FRAME_X_WINDOW (s->f), | |
816 | gc, x + i, y, s->char2b + from + i, 1); | |
817 | else | |
818 | XDrawString16 (FRAME_X_DISPLAY (s->f), FRAME_X_WINDOW (s->f), | |
819 | gc, x, y, s->char2b + from, len); | |
820 | } | |
d45fefc7 | 821 | UNBLOCK_INPUT; |
c2f5bfd6 KH |
822 | |
823 | return len; | |
824 | } | |
825 | ||
f0c55750 KH |
826 | static int |
827 | xfont_check (f, font) | |
828 | FRAME_PTR f; | |
829 | struct font *font; | |
830 | { | |
831 | struct xfont_info *xfont = (struct xfont_info *) font; | |
832 | ||
833 | return (FRAME_X_DISPLAY (f) == xfont->display ? 0 : -1); | |
834 | } | |
835 | ||
c2f5bfd6 KH |
836 | \f |
837 | void | |
838 | syms_of_xfont () | |
839 | { | |
c2f5bfd6 KH |
840 | xfont_driver.type = Qx; |
841 | register_font_driver (&xfont_driver, NULL); | |
842 | } | |
885b7d09 MB |
843 | |
844 | /* arch-tag: 23c5f366-a5ee-44b7-a3b7-90d6da7fd749 | |
845 | (do not change this comment) */ |