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e14dc92d | 1 | /* Font backend for the Microsoft W32 Uniscribe API. |
ab422c4d | 2 | Copyright (C) 2008-2013 Free Software Foundation, Inc. |
e14dc92d JR |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
9ec0b715 | 6 | GNU Emacs is free software: you can redistribute it and/or modify |
e14dc92d | 7 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
8 | the Free Software Foundation, either version 3 of the License, or |
9 | (at your option) any later version. | |
e14dc92d JR |
10 | |
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 17 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
e14dc92d | 18 | |
e14dc92d JR |
19 | |
20 | #include <config.h> | |
21 | /* Override API version - Uniscribe is only available as standard since | |
22 | Windows 2000, though most users of older systems will have it | |
23 | since it installs with Internet Explorer 5.0 and other software. | |
24 | We only enable the feature if it is available, so there is no chance | |
5a89f0a7 | 25 | of calling non-existent functions. */ |
e14dc92d JR |
26 | #undef _WIN32_WINNT |
27 | #define _WIN32_WINNT 0x500 | |
28 | #include <windows.h> | |
29 | #include <usp10.h> | |
30 | ||
31 | #include "lisp.h" | |
32 | #include "w32term.h" | |
33 | #include "frame.h" | |
34 | #include "dispextern.h" | |
35 | #include "character.h" | |
36 | #include "charset.h" | |
716e6ba3 | 37 | #include "composite.h" |
e14dc92d JR |
38 | #include "fontset.h" |
39 | #include "font.h" | |
40 | #include "w32font.h" | |
41 | ||
42 | struct uniscribe_font_info | |
43 | { | |
44 | struct w32font_info w32_font; | |
45 | SCRIPT_CACHE cache; | |
46 | }; | |
47 | ||
48 | int uniscribe_available = 0; | |
49 | ||
50 | /* Defined in w32font.c, since it is required there as well. */ | |
51 | extern Lisp_Object Quniscribe; | |
52 | extern Lisp_Object Qopentype; | |
53 | ||
e14dc92d | 54 | /* EnumFontFamiliesEx callback. */ |
f57e2426 J |
55 | static int CALLBACK add_opentype_font_name_to_list (ENUMLOGFONTEX *, |
56 | NEWTEXTMETRICEX *, | |
57 | DWORD, LPARAM); | |
e14dc92d JR |
58 | /* Used by uniscribe_otf_capability. */ |
59 | static Lisp_Object otf_features (HDC context, char *table); | |
60 | ||
61 | static int | |
b56ceb92 | 62 | memq_no_quit (Lisp_Object elt, Lisp_Object list) |
e14dc92d JR |
63 | { |
64 | while (CONSP (list) && ! EQ (XCAR (list), elt)) | |
65 | list = XCDR (list); | |
66 | return (CONSP (list)); | |
67 | } | |
68 | ||
69 | \f | |
70 | /* Font backend interface implementation. */ | |
71 | static Lisp_Object | |
6c1a09ba | 72 | uniscribe_list (struct frame *f, Lisp_Object font_spec) |
e14dc92d | 73 | { |
6c1a09ba | 74 | Lisp_Object fonts = w32font_list_internal (f, font_spec, 1); |
678dca3d | 75 | FONT_ADD_LOG ("uniscribe-list", font_spec, fonts); |
07d9ba9b | 76 | return fonts; |
e14dc92d JR |
77 | } |
78 | ||
79 | static Lisp_Object | |
6c1a09ba | 80 | uniscribe_match (struct frame *f, Lisp_Object font_spec) |
e14dc92d | 81 | { |
6c1a09ba | 82 | Lisp_Object entity = w32font_match_internal (f, font_spec, 1); |
678dca3d | 83 | FONT_ADD_LOG ("uniscribe-match", font_spec, entity); |
07d9ba9b | 84 | return entity; |
e14dc92d JR |
85 | } |
86 | ||
87 | static Lisp_Object | |
6c1a09ba | 88 | uniscribe_list_family (struct frame *f) |
e14dc92d JR |
89 | { |
90 | Lisp_Object list = Qnil; | |
91 | LOGFONT font_match_pattern; | |
92 | HDC dc; | |
e14dc92d | 93 | |
72af86bd | 94 | memset (&font_match_pattern, 0, sizeof (font_match_pattern)); |
e14dc92d JR |
95 | /* Limit enumerated fonts to outline fonts to save time. */ |
96 | font_match_pattern.lfOutPrecision = OUT_OUTLINE_PRECIS; | |
97 | ||
98 | dc = get_frame_dc (f); | |
99 | ||
100 | EnumFontFamiliesEx (dc, &font_match_pattern, | |
101 | (FONTENUMPROC) add_opentype_font_name_to_list, | |
102 | (LPARAM) &list, 0); | |
103 | release_frame_dc (f, dc); | |
104 | ||
105 | return list; | |
106 | } | |
107 | ||
fd302b02 | 108 | static Lisp_Object |
a10c8269 | 109 | uniscribe_open (struct frame *f, Lisp_Object font_entity, int pixel_size) |
e14dc92d | 110 | { |
fd302b02 | 111 | Lisp_Object font_object |
e83ceb8b KH |
112 | = font_make_object (VECSIZE (struct uniscribe_font_info), |
113 | font_entity, pixel_size); | |
e14dc92d | 114 | struct uniscribe_font_info *uniscribe_font |
fd302b02 | 115 | = (struct uniscribe_font_info *) XFONT_OBJECT (font_object); |
e14dc92d | 116 | |
4b135503 JR |
117 | ASET (font_object, FONT_TYPE_INDEX, Quniscribe); |
118 | ||
fd302b02 | 119 | if (!w32font_open_internal (f, font_entity, pixel_size, font_object)) |
e14dc92d | 120 | { |
fd302b02 | 121 | return Qnil; |
e14dc92d JR |
122 | } |
123 | ||
124 | /* Initialize the cache for this font. */ | |
125 | uniscribe_font->cache = NULL; | |
11856d4d | 126 | |
bd187c49 JR |
127 | /* Uniscribe backend uses glyph indices. */ |
128 | uniscribe_font->w32_font.glyph_idx = ETO_GLYPH_INDEX; | |
129 | ||
e14dc92d | 130 | /* Mark the format as opentype */ |
fd302b02 | 131 | uniscribe_font->w32_font.font.props[FONT_FORMAT_INDEX] = Qopentype; |
e14dc92d JR |
132 | uniscribe_font->w32_font.font.driver = &uniscribe_font_driver; |
133 | ||
fd302b02 | 134 | return font_object; |
e14dc92d JR |
135 | } |
136 | ||
137 | static void | |
f67599d5 | 138 | uniscribe_close (struct font *font) |
e14dc92d JR |
139 | { |
140 | struct uniscribe_font_info *uniscribe_font | |
141 | = (struct uniscribe_font_info *) font; | |
142 | ||
143 | if (uniscribe_font->cache) | |
11856d4d | 144 | ScriptFreeCache (&(uniscribe_font->cache)); |
e14dc92d | 145 | |
6702c559 | 146 | w32font_close (font); |
e14dc92d JR |
147 | } |
148 | ||
149 | /* Return a list describing which scripts/languages FONT supports by | |
150 | which GSUB/GPOS features of OpenType tables. */ | |
151 | static Lisp_Object | |
b56ceb92 | 152 | uniscribe_otf_capability (struct font *font) |
e14dc92d JR |
153 | { |
154 | HDC context; | |
155 | HFONT old_font; | |
156 | struct frame *f; | |
157 | Lisp_Object capability = Fcons (Qnil, Qnil); | |
158 | Lisp_Object features; | |
159 | ||
160 | f = XFRAME (selected_frame); | |
161 | context = get_frame_dc (f); | |
ed3751c8 | 162 | old_font = SelectObject (context, FONT_HANDLE (font)); |
e14dc92d JR |
163 | |
164 | features = otf_features (context, "GSUB"); | |
165 | XSETCAR (capability, features); | |
166 | features = otf_features (context, "GPOS"); | |
167 | XSETCDR (capability, features); | |
168 | ||
169 | SelectObject (context, old_font); | |
170 | release_frame_dc (f, context); | |
171 | ||
172 | return capability; | |
173 | } | |
174 | ||
175 | /* Uniscribe implementation of shape for font backend. | |
176 | ||
6e6b8e25 EZ |
177 | Shape text in LGSTRING. See the docstring of |
178 | `composition-get-gstring' for the format of LGSTRING. If the | |
179 | (N+1)th element of LGSTRING is nil, input of shaping is from the | |
180 | 1st to (N)th elements. In each input glyph, FROM, TO, CHAR, and | |
181 | CODE are already set. | |
e14dc92d JR |
182 | |
183 | This function updates all fields of the input glyphs. If the | |
184 | output glyphs (M) are more than the input glyphs (N), (N+1)th | |
185 | through (M)th elements of LGSTRING are updated possibly by making | |
186 | a new glyph object and storing it in LGSTRING. If (M) is greater | |
6e6b8e25 EZ |
187 | than the length of LGSTRING, nil should be returned. In that case, |
188 | this function is called again with a larger LGSTRING. */ | |
e14dc92d | 189 | static Lisp_Object |
b56ceb92 | 190 | uniscribe_shape (Lisp_Object lgstring) |
e14dc92d JR |
191 | { |
192 | struct font * font; | |
193 | struct uniscribe_font_info * uniscribe_font; | |
194 | EMACS_UINT nchars; | |
0ce24b2d | 195 | int nitems, max_items, i, max_glyphs, done_glyphs; |
e14dc92d JR |
196 | wchar_t *chars; |
197 | WORD *glyphs, *clusters; | |
198 | SCRIPT_ITEM *items; | |
e14dc92d JR |
199 | SCRIPT_VISATTR *attributes; |
200 | int *advances; | |
201 | GOFFSET *offsets; | |
202 | ABC overall_metrics; | |
e14dc92d | 203 | HRESULT result; |
c320e90a JR |
204 | struct frame * f = NULL; |
205 | HDC context = NULL; | |
206 | HFONT old_font = NULL; | |
e14dc92d JR |
207 | |
208 | CHECK_FONT_GET_OBJECT (LGSTRING_FONT (lgstring), font); | |
209 | uniscribe_font = (struct uniscribe_font_info *) font; | |
210 | ||
211 | /* Get the chars from lgstring in a form we can use with uniscribe. */ | |
716e6ba3 | 212 | max_glyphs = nchars = LGSTRING_GLYPH_LEN (lgstring); |
0ce24b2d | 213 | done_glyphs = 0; |
e14dc92d | 214 | chars = (wchar_t *) alloca (nchars * sizeof (wchar_t)); |
6e6b8e25 EZ |
215 | /* FIXME: This loop assumes that characters in the input LGSTRING |
216 | are all inside the BMP. Need to encode characters beyond the BMP | |
217 | as UTF-16. */ | |
e14dc92d JR |
218 | for (i = 0; i < nchars; i++) |
219 | { | |
220 | /* lgstring can be bigger than the number of characters in it, in | |
221 | the case where more glyphs are required to display those characters. | |
222 | If that is the case, note the real number of characters. */ | |
223 | if (NILP (LGSTRING_GLYPH (lgstring, i))) | |
224 | nchars = i; | |
225 | else | |
226 | chars[i] = LGLYPH_CHAR (LGSTRING_GLYPH (lgstring, i)); | |
227 | } | |
228 | ||
229 | /* First we need to break up the glyph string into runs of glyphs that | |
230 | can be treated together. First try a single run. */ | |
231 | max_items = 2; | |
23f86fce | 232 | items = xmalloc (sizeof (SCRIPT_ITEM) * max_items + 1); |
e14dc92d | 233 | |
11856d4d | 234 | while ((result = ScriptItemize (chars, nchars, max_items, NULL, NULL, |
e14dc92d JR |
235 | items, &nitems)) == E_OUTOFMEMORY) |
236 | { | |
237 | /* If that wasn't enough, keep trying with one more run. */ | |
238 | max_items++; | |
239 | items = (SCRIPT_ITEM *) xrealloc (items, | |
0ce24b2d | 240 | sizeof (SCRIPT_ITEM) * max_items + 1); |
e14dc92d JR |
241 | } |
242 | ||
c320e90a | 243 | if (FAILED (result)) |
e14dc92d JR |
244 | { |
245 | xfree (items); | |
246 | return Qnil; | |
247 | } | |
248 | ||
e14dc92d JR |
249 | glyphs = alloca (max_glyphs * sizeof (WORD)); |
250 | clusters = alloca (nchars * sizeof (WORD)); | |
251 | attributes = alloca (max_glyphs * sizeof (SCRIPT_VISATTR)); | |
252 | advances = alloca (max_glyphs * sizeof (int)); | |
253 | offsets = alloca (max_glyphs * sizeof (GOFFSET)); | |
e14dc92d JR |
254 | |
255 | for (i = 0; i < nitems; i++) | |
256 | { | |
6e6b8e25 | 257 | int nglyphs, nchars_in_run; |
e14dc92d | 258 | nchars_in_run = items[i+1].iCharPos - items[i].iCharPos; |
6e6b8e25 EZ |
259 | /* Force ScriptShape to generate glyphs in the same order as |
260 | they are in the input LGSTRING, which is in the logical | |
261 | order. */ | |
262 | items[i].a.fLogicalOrder = 1; | |
e14dc92d | 263 | |
c320e90a JR |
264 | /* Context may be NULL here, in which case the cache should be |
265 | used without needing to select the font. */ | |
e14dc92d JR |
266 | result = ScriptShape (context, &(uniscribe_font->cache), |
267 | chars + items[i].iCharPos, nchars_in_run, | |
268 | max_glyphs - done_glyphs, &(items[i].a), | |
269 | glyphs, clusters, attributes, &nglyphs); | |
c320e90a JR |
270 | |
271 | if (result == E_PENDING && !context) | |
272 | { | |
273 | /* This assumes the selected frame is on the same display as the | |
274 | one we are drawing. It would be better for the frame to be | |
275 | passed in. */ | |
276 | f = XFRAME (selected_frame); | |
277 | context = get_frame_dc (f); | |
ed3751c8 | 278 | old_font = SelectObject (context, FONT_HANDLE (font)); |
c320e90a JR |
279 | |
280 | result = ScriptShape (context, &(uniscribe_font->cache), | |
281 | chars + items[i].iCharPos, nchars_in_run, | |
282 | max_glyphs - done_glyphs, &(items[i].a), | |
283 | glyphs, clusters, attributes, &nglyphs); | |
284 | } | |
285 | ||
e14dc92d JR |
286 | if (result == E_OUTOFMEMORY) |
287 | { | |
288 | /* Need a bigger lgstring. */ | |
289 | lgstring = Qnil; | |
290 | break; | |
291 | } | |
c320e90a | 292 | else if (FAILED (result)) |
e14dc92d JR |
293 | { |
294 | /* Can't shape this run - return results so far if any. */ | |
295 | break; | |
296 | } | |
0ce24b2d JR |
297 | else if (items[i].a.fNoGlyphIndex) |
298 | { | |
299 | /* Glyph indices not supported by this font (or OS), means we | |
300 | can't really do any meaningful shaping. */ | |
301 | break; | |
302 | } | |
e14dc92d JR |
303 | else |
304 | { | |
305 | result = ScriptPlace (context, &(uniscribe_font->cache), | |
306 | glyphs, nglyphs, attributes, &(items[i].a), | |
307 | advances, offsets, &overall_metrics); | |
c320e90a JR |
308 | if (result == E_PENDING && !context) |
309 | { | |
310 | /* Cache not complete... */ | |
311 | f = XFRAME (selected_frame); | |
312 | context = get_frame_dc (f); | |
ed3751c8 | 313 | old_font = SelectObject (context, FONT_HANDLE (font)); |
c320e90a JR |
314 | |
315 | result = ScriptPlace (context, &(uniscribe_font->cache), | |
316 | glyphs, nglyphs, attributes, &(items[i].a), | |
317 | advances, offsets, &overall_metrics); | |
318 | } | |
319 | if (SUCCEEDED (result)) | |
e14dc92d | 320 | { |
b2f09701 EZ |
321 | int j, from, to, adj_offset = 0; |
322 | ||
6e6b8e25 | 323 | from = 0; |
b7655e0c | 324 | to = from; |
e14dc92d JR |
325 | |
326 | for (j = 0; j < nglyphs; j++) | |
327 | { | |
328 | int lglyph_index = j + done_glyphs; | |
329 | Lisp_Object lglyph = LGSTRING_GLYPH (lgstring, lglyph_index); | |
0ce24b2d | 330 | ABC char_metric; |
4bf84f7d | 331 | unsigned gl; |
e14dc92d JR |
332 | |
333 | if (NILP (lglyph)) | |
334 | { | |
42926ec8 | 335 | lglyph = LGLYPH_NEW (); |
e14dc92d JR |
336 | LGSTRING_SET_GLYPH (lgstring, lglyph_index, lglyph); |
337 | } | |
4bf84f7d EZ |
338 | /* Copy to a 32-bit data type to shut up the |
339 | compiler warning in LGLYPH_SET_CODE about | |
340 | comparison being always false. */ | |
341 | gl = glyphs[j]; | |
342 | LGLYPH_SET_CODE (lglyph, gl); | |
0ce24b2d | 343 | |
6e6b8e25 EZ |
344 | /* Detect clusters, for linking codes back to |
345 | characters. */ | |
0ce24b2d | 346 | if (attributes[j].fClusterStart) |
e14dc92d | 347 | { |
6e6b8e25 EZ |
348 | while (from < nchars_in_run && clusters[from] < j) |
349 | from++; | |
350 | if (from >= nchars_in_run) | |
b7655e0c | 351 | from = to = nchars_in_run - 1; |
0ce24b2d JR |
352 | else |
353 | { | |
354 | int k; | |
6e6b8e25 EZ |
355 | to = nchars_in_run - 1; |
356 | for (k = from + 1; k < nchars_in_run; k++) | |
0ce24b2d JR |
357 | { |
358 | if (clusters[k] > j) | |
359 | { | |
b7655e0c | 360 | to = k - 1; |
0ce24b2d JR |
361 | break; |
362 | } | |
363 | } | |
364 | } | |
7e510e28 EZ |
365 | |
366 | /* For RTL text, the Uniscribe shaper prepares | |
367 | the values in ADVANCES array for layout in | |
368 | reverse order, whereby "advance width" is | |
369 | applied to move the pen in reverse direction | |
370 | and _before_ drawing the glyph. Since we | |
371 | draw glyphs in their normal left-to-right | |
372 | order, we need to adjust the coordinates of | |
373 | each non-base glyph in a grapheme cluster via | |
374 | X-OFF component of the gstring's ADJUSTMENT | |
375 | sub-vector. This loop computes, for each | |
376 | grapheme cluster, the initial value of the | |
377 | adjustment for the base character, which is | |
378 | then updated for each successive glyph in the | |
379 | grapheme cluster. */ | |
380 | if (items[i].a.fRTL) | |
381 | { | |
382 | int j1 = j; | |
383 | ||
384 | adj_offset = 0; | |
385 | while (j1 < nglyphs && !attributes[j1].fClusterStart) | |
386 | { | |
387 | adj_offset += advances[j1]; | |
388 | j1++; | |
389 | } | |
390 | } | |
e14dc92d | 391 | } |
e14dc92d | 392 | |
b7655e0c JR |
393 | LGLYPH_SET_CHAR (lglyph, chars[items[i].iCharPos |
394 | + from]); | |
395 | LGLYPH_SET_FROM (lglyph, items[i].iCharPos + from); | |
396 | LGLYPH_SET_TO (lglyph, items[i].iCharPos + to); | |
e14dc92d | 397 | |
0ce24b2d JR |
398 | /* Metrics. */ |
399 | LGLYPH_SET_WIDTH (lglyph, advances[j]); | |
400 | LGLYPH_SET_ASCENT (lglyph, font->ascent); | |
401 | LGLYPH_SET_DESCENT (lglyph, font->descent); | |
402 | ||
403 | result = ScriptGetGlyphABCWidth (context, | |
404 | &(uniscribe_font->cache), | |
405 | glyphs[j], &char_metric); | |
c320e90a JR |
406 | if (result == E_PENDING && !context) |
407 | { | |
408 | /* Cache incomplete... */ | |
409 | f = XFRAME (selected_frame); | |
410 | context = get_frame_dc (f); | |
ed3751c8 | 411 | old_font = SelectObject (context, FONT_HANDLE (font)); |
c320e90a JR |
412 | result = ScriptGetGlyphABCWidth (context, |
413 | &(uniscribe_font->cache), | |
414 | glyphs[j], &char_metric); | |
415 | } | |
e14dc92d | 416 | |
11856d4d | 417 | if (SUCCEEDED (result)) |
0ce24b2d | 418 | { |
b2f09701 EZ |
419 | int lbearing = char_metric.abcA; |
420 | int rbearing = char_metric.abcA + char_metric.abcB; | |
421 | ||
422 | LGLYPH_SET_LBEARING (lglyph, lbearing); | |
423 | LGLYPH_SET_RBEARING (lglyph, rbearing); | |
0ce24b2d JR |
424 | } |
425 | else | |
e14dc92d | 426 | { |
0ce24b2d JR |
427 | LGLYPH_SET_LBEARING (lglyph, 0); |
428 | LGLYPH_SET_RBEARING (lglyph, advances[j]); | |
e14dc92d | 429 | } |
0ce24b2d | 430 | |
b2f09701 EZ |
431 | if (offsets[j].du || offsets[j].dv |
432 | /* For non-base glyphs of RTL grapheme clusters, | |
433 | adjust the X offset even if both DU and DV | |
434 | are zero. */ | |
435 | || (!attributes[j].fClusterStart && items[i].a.fRTL)) | |
e14dc92d | 436 | { |
25721f5b DA |
437 | Lisp_Object vec = make_uninit_vector (3); |
438 | ||
b2f09701 EZ |
439 | if (items[i].a.fRTL) |
440 | { | |
441 | /* Empirically, it looks like Uniscribe | |
442 | interprets DU in reverse direction for | |
443 | RTL clusters. E.g., if we don't reverse | |
444 | the direction, the Hebrew point HOLAM is | |
445 | drawn above the right edge of the base | |
446 | consonant, instead of above the left edge. */ | |
447 | ASET (vec, 0, make_number (-offsets[j].du | |
448 | + adj_offset)); | |
449 | /* Update the adjustment value for the width | |
450 | advance of the glyph we just emitted. */ | |
451 | adj_offset -= 2 * advances[j]; | |
452 | } | |
453 | else | |
454 | ASET (vec, 0, make_number (offsets[j].du + adj_offset)); | |
30934d33 EZ |
455 | /* In the font definition coordinate system, the |
456 | Y coordinate points up, while in our screen | |
457 | coordinates Y grows downwards. So we need to | |
458 | reverse the sign of Y-OFFSET here. */ | |
459 | ASET (vec, 1, make_number (-offsets[j].dv)); | |
0ce24b2d JR |
460 | /* Based on what ftfont.c does... */ |
461 | ASET (vec, 2, make_number (advances[j])); | |
462 | LGLYPH_SET_ADJUSTMENT (lglyph, vec); | |
e14dc92d | 463 | } |
0ce24b2d | 464 | else |
b2f09701 EZ |
465 | { |
466 | LGLYPH_SET_ADJUSTMENT (lglyph, Qnil); | |
467 | /* Update the adjustment value to compensate for | |
468 | the width of the base character. */ | |
469 | if (items[i].a.fRTL) | |
470 | adj_offset -= advances[j]; | |
471 | } | |
c320e90a JR |
472 | } |
473 | } | |
e14dc92d JR |
474 | } |
475 | done_glyphs += nglyphs; | |
e14dc92d JR |
476 | } |
477 | ||
478 | xfree (items); | |
c320e90a JR |
479 | |
480 | if (context) | |
481 | { | |
482 | SelectObject (context, old_font); | |
483 | release_frame_dc (f, context); | |
484 | } | |
e14dc92d JR |
485 | |
486 | if (NILP (lgstring)) | |
487 | return Qnil; | |
488 | else | |
0ce24b2d | 489 | return make_number (done_glyphs); |
e14dc92d JR |
490 | } |
491 | ||
492 | /* Uniscribe implementation of encode_char for font backend. | |
51e4f4a8 | 493 | Return a glyph code of FONT for character C (Unicode code point). |
e14dc92d JR |
494 | If FONT doesn't have such a glyph, return FONT_INVALID_CODE. */ |
495 | static unsigned | |
b56ceb92 | 496 | uniscribe_encode_char (struct font *font, int c) |
e14dc92d | 497 | { |
c320e90a JR |
498 | HDC context = NULL; |
499 | struct frame *f = NULL; | |
500 | HFONT old_font = NULL; | |
11856d4d | 501 | unsigned code = FONT_INVALID_CODE; |
c320e90a JR |
502 | wchar_t ch[2]; |
503 | int len; | |
504 | SCRIPT_ITEM* items; | |
505 | int nitems; | |
506 | struct uniscribe_font_info *uniscribe_font | |
507 | = (struct uniscribe_font_info *)font; | |
11856d4d | 508 | |
11856d4d JR |
509 | if (c < 0x10000) |
510 | { | |
c320e90a JR |
511 | ch[0] = (wchar_t) c; |
512 | len = 1; | |
11856d4d | 513 | } |
11856d4d | 514 | else |
f31cf550 JR |
515 | { |
516 | DWORD surrogate = c - 0x10000; | |
e14dc92d | 517 | |
f31cf550 | 518 | /* High surrogate: U+D800 - U+DBFF. */ |
11856d4d | 519 | ch[0] = 0xD800 + ((surrogate >> 10) & 0x03FF); |
f31cf550 | 520 | /* Low surrogate: U+DC00 - U+DFFF. */ |
11856d4d | 521 | ch[1] = 0xDC00 + (surrogate & 0x03FF); |
c320e90a JR |
522 | len = 2; |
523 | } | |
11856d4d | 524 | |
c320e90a JR |
525 | /* Non BMP characters must be handled by the uniscribe shaping |
526 | engine as GDI functions (except blindly displaying lines of | |
fe7a3057 | 527 | Unicode text) and the promising looking ScriptGetCMap do not |
c320e90a JR |
528 | convert surrogate pairs to glyph indexes correctly. */ |
529 | { | |
11856d4d | 530 | items = (SCRIPT_ITEM *) alloca (sizeof (SCRIPT_ITEM) * 2 + 1); |
c320e90a JR |
531 | if (SUCCEEDED (ScriptItemize (ch, len, 2, NULL, NULL, items, &nitems))) |
532 | { | |
533 | HRESULT result; | |
b4233ec9 JR |
534 | /* Surrogates seem to need 2 here, even though only one glyph is |
535 | returned. Indic characters can also produce 2 or more glyphs for | |
536 | a single code point, but they need to use uniscribe_shape | |
537 | above for correct display. */ | |
538 | WORD glyphs[2], clusters[2]; | |
539 | SCRIPT_VISATTR attrs[2]; | |
11856d4d JR |
540 | int nglyphs; |
541 | ||
6e6b8e25 EZ |
542 | /* Force ScriptShape to generate glyphs in the logical |
543 | order. */ | |
544 | items[0].a.fLogicalOrder = 1; | |
545 | ||
c320e90a | 546 | result = ScriptShape (context, &(uniscribe_font->cache), |
b4233ec9 | 547 | ch, len, 2, &(items[0].a), |
c320e90a JR |
548 | glyphs, clusters, attrs, &nglyphs); |
549 | ||
550 | if (result == E_PENDING) | |
551 | { | |
552 | /* Use selected frame until API is updated to pass | |
553 | the frame. */ | |
554 | f = XFRAME (selected_frame); | |
555 | context = get_frame_dc (f); | |
ed3751c8 | 556 | old_font = SelectObject (context, FONT_HANDLE (font)); |
c320e90a JR |
557 | result = ScriptShape (context, &(uniscribe_font->cache), |
558 | ch, len, 2, &(items[0].a), | |
559 | glyphs, clusters, attrs, &nglyphs); | |
560 | } | |
561 | ||
562 | if (SUCCEEDED (result) && nglyphs == 1) | |
11856d4d | 563 | { |
1fc200d6 | 564 | /* Some fonts return .notdef glyphs instead of failing. |
7877f373 | 565 | (TrueType spec reserves glyph code 0 for .notdef) */ |
1fc200d6 JR |
566 | if (glyphs[0]) |
567 | code = glyphs[0]; | |
11856d4d | 568 | } |
c320e90a JR |
569 | else if (SUCCEEDED (result) || result == E_OUTOFMEMORY) |
570 | { | |
571 | /* This character produces zero or more than one glyph | |
572 | when shaped. But we still need the return from here | |
573 | to be valid for the shaping engine to be invoked | |
574 | later. */ | |
575 | result = ScriptGetCMap (context, &(uniscribe_font->cache), | |
576 | ch, len, 0, glyphs); | |
1fc200d6 | 577 | if (SUCCEEDED (result) && glyphs[0]) |
a608bcbf | 578 | code = glyphs[0]; |
c320e90a JR |
579 | } |
580 | } | |
f31cf550 | 581 | } |
c320e90a JR |
582 | if (context) |
583 | { | |
584 | SelectObject (context, old_font); | |
585 | release_frame_dc (f, context); | |
586 | } | |
e14dc92d | 587 | |
c320e90a | 588 | return code; |
e14dc92d JR |
589 | } |
590 | ||
591 | /* | |
592 | Shared with w32font: | |
593 | Lisp_Object uniscribe_get_cache (Lisp_Object frame); | |
594 | void uniscribe_free_entity (Lisp_Object font_entity); | |
595 | int uniscribe_has_char (Lisp_Object entity, int c); | |
596 | int uniscribe_text_extents (struct font *font, unsigned *code, | |
597 | int nglyphs, struct font_metrics *metrics); | |
598 | int uniscribe_draw (struct glyph_string *s, int from, int to, | |
599 | int x, int y, int with_background); | |
600 | ||
601 | Unused: | |
a10c8269 DA |
602 | int uniscribe_prepare_face (struct frame *f, struct face *face); |
603 | void uniscribe_done_face (struct frame *f, struct face *face); | |
e14dc92d JR |
604 | int uniscribe_get_bitmap (struct font *font, unsigned code, |
605 | struct font_bitmap *bitmap, int bits_per_pixel); | |
606 | void uniscribe_free_bitmap (struct font *font, struct font_bitmap *bitmap); | |
607 | void * uniscribe_get_outline (struct font *font, unsigned code); | |
608 | void uniscribe_free_outline (struct font *font, void *outline); | |
609 | int uniscribe_anchor_point (struct font *font, unsigned code, | |
610 | int index, int *x, int *y); | |
a10c8269 DA |
611 | int uniscribe_start_for_frame (struct frame *f); |
612 | int uniscribe_end_for_frame (struct frame *f); | |
e14dc92d JR |
613 | |
614 | */ | |
615 | ||
616 | \f | |
617 | /* Callback function for EnumFontFamiliesEx. | |
618 | Adds the name of opentype fonts to a Lisp list (passed in as the | |
619 | lParam arg). */ | |
620 | static int CALLBACK | |
b56ceb92 JB |
621 | add_opentype_font_name_to_list (ENUMLOGFONTEX *logical_font, |
622 | NEWTEXTMETRICEX *physical_font, | |
623 | DWORD font_type, LPARAM list_object) | |
e14dc92d JR |
624 | { |
625 | Lisp_Object* list = (Lisp_Object *) list_object; | |
626 | Lisp_Object family; | |
627 | ||
628 | /* Skip vertical fonts (intended only for printing) */ | |
629 | if (logical_font->elfLogFont.lfFaceName[0] == '@') | |
630 | return 1; | |
631 | ||
632 | /* Skip non opentype fonts. Count old truetype fonts as opentype, | |
633 | as some of them do contain GPOS and GSUB data that Uniscribe | |
634 | can make use of. */ | |
635 | if (!(physical_font->ntmTm.ntmFlags & NTMFLAGS_OPENTYPE) | |
636 | && font_type != TRUETYPE_FONTTYPE) | |
637 | return 1; | |
638 | ||
fe7a3057 | 639 | /* Skip fonts that have no Unicode coverage. */ |
351ccb76 JR |
640 | if (!physical_font->ntmFontSig.fsUsb[3] |
641 | && !physical_font->ntmFontSig.fsUsb[2] | |
642 | && !physical_font->ntmFontSig.fsUsb[1] | |
643 | && !(physical_font->ntmFontSig.fsUsb[0] & 0x3fffffff)) | |
644 | return 1; | |
645 | ||
e6df5336 | 646 | family = intern_font_name (logical_font->elfLogFont.lfFaceName); |
e14dc92d JR |
647 | if (! memq_no_quit (family, *list)) |
648 | *list = Fcons (family, *list); | |
649 | ||
650 | return 1; | |
651 | } | |
652 | ||
653 | \f | |
654 | /* :otf property handling. | |
655 | Since the necessary Uniscribe APIs for getting font tag information | |
656 | are only available in Vista, we need to parse the font data directly | |
657 | according to the OpenType Specification. */ | |
658 | ||
659 | /* Push into DWORD backwards to cope with endianness. */ | |
660 | #define OTF_TAG(STR) \ | |
661 | ((STR[3] << 24) | (STR[2] << 16) | (STR[1] << 8) | STR[0]) | |
662 | ||
663 | #define OTF_INT16_VAL(TABLE, OFFSET, PTR) \ | |
664 | do { \ | |
665 | BYTE temp, data[2]; \ | |
666 | if (GetFontData (context, TABLE, OFFSET, data, 2) != 2) \ | |
667 | goto font_table_error; \ | |
668 | temp = data[0], data[0] = data[1], data[1] = temp; \ | |
669 | memcpy (PTR, data, 2); \ | |
670 | } while (0) | |
671 | ||
672 | /* Do not reverse the bytes, because we will compare with a OTF_TAG value | |
673 | that has them reversed already. */ | |
674 | #define OTF_DWORDTAG_VAL(TABLE, OFFSET, PTR) \ | |
675 | do { \ | |
676 | if (GetFontData (context, TABLE, OFFSET, PTR, 4) != 4) \ | |
677 | goto font_table_error; \ | |
678 | } while (0) | |
679 | ||
680 | #define OTF_TAG_VAL(TABLE, OFFSET, STR) \ | |
681 | do { \ | |
682 | if (GetFontData (context, TABLE, OFFSET, STR, 4) != 4) \ | |
683 | goto font_table_error; \ | |
684 | STR[4] = '\0'; \ | |
685 | } while (0) | |
686 | ||
3bf8d230 | 687 | #define SNAME(VAL) SDATA (SYMBOL_NAME (VAL)) |
e14dc92d JR |
688 | |
689 | /* Check if font supports the otf script/language/features specified. | |
690 | OTF_SPEC is in the format | |
691 | (script lang [(gsub_feature ...)|nil] [(gpos_feature ...)]?) */ | |
b56ceb92 JB |
692 | int |
693 | uniscribe_check_otf (LOGFONT *font, Lisp_Object otf_spec) | |
e14dc92d JR |
694 | { |
695 | Lisp_Object script, lang, rest; | |
696 | Lisp_Object features[2]; | |
697 | DWORD feature_tables[2]; | |
698 | DWORD script_tag, default_script, lang_tag = 0; | |
699 | struct frame * f; | |
700 | HDC context; | |
701 | HFONT check_font, old_font; | |
e14dc92d | 702 | int i, retval = 0; |
e38ac6e2 | 703 | struct gcpro gcpro1; |
e14dc92d | 704 | |
6b8aa22a | 705 | /* Check the spec is in the right format. */ |
df7e1ea0 | 706 | if (!CONSP (otf_spec) || XINT (Flength (otf_spec)) < 3) |
6b8aa22a JR |
707 | return 0; |
708 | ||
e14dc92d JR |
709 | /* Break otf_spec into its components. */ |
710 | script = XCAR (otf_spec); | |
711 | rest = XCDR (otf_spec); | |
712 | ||
713 | lang = XCAR (rest); | |
714 | rest = XCDR (rest); | |
715 | ||
716 | features[0] = XCAR (rest); | |
717 | rest = XCDR (rest); | |
718 | if (NILP (rest)) | |
719 | features[1] = Qnil; | |
720 | else | |
721 | features[1] = XCAR (rest); | |
722 | ||
723 | /* Set up tags we will use in the search. */ | |
724 | feature_tables[0] = OTF_TAG ("GSUB"); | |
725 | feature_tables[1] = OTF_TAG ("GPOS"); | |
726 | default_script = OTF_TAG ("DFLT"); | |
727 | if (NILP (script)) | |
728 | script_tag = default_script; | |
729 | else | |
730 | script_tag = OTF_TAG (SNAME (script)); | |
731 | if (!NILP (lang)) | |
732 | lang_tag = OTF_TAG (SNAME (lang)); | |
733 | ||
734 | /* Set up graphics context so we can use the font. */ | |
735 | f = XFRAME (selected_frame); | |
736 | context = get_frame_dc (f); | |
737 | check_font = CreateFontIndirect (font); | |
738 | old_font = SelectObject (context, check_font); | |
739 | ||
e38ac6e2 JR |
740 | /* Everything else is contained within otf_spec so should get |
741 | marked along with it. */ | |
742 | GCPRO1 (otf_spec); | |
743 | ||
e14dc92d JR |
744 | /* Scan GSUB and GPOS tables. */ |
745 | for (i = 0; i < 2; i++) | |
746 | { | |
747 | int j, n_match_features; | |
748 | unsigned short scriptlist_table, feature_table, n_scripts; | |
749 | unsigned short script_table, langsys_table, n_langs; | |
750 | unsigned short feature_index, n_features; | |
751 | DWORD tbl = feature_tables[i]; | |
e14dc92d JR |
752 | |
753 | /* Skip if no features requested from this table. */ | |
754 | if (NILP (features[i])) | |
755 | continue; | |
756 | ||
6b8aa22a JR |
757 | /* If features is not a cons, this font spec is messed up. */ |
758 | if (!CONSP (features[i])) | |
759 | goto no_support; | |
760 | ||
e14dc92d JR |
761 | /* Read GPOS/GSUB header. */ |
762 | OTF_INT16_VAL (tbl, 4, &scriptlist_table); | |
763 | OTF_INT16_VAL (tbl, 6, &feature_table); | |
764 | OTF_INT16_VAL (tbl, scriptlist_table, &n_scripts); | |
765 | ||
766 | /* Find the appropriate script table. */ | |
767 | script_table = 0; | |
768 | for (j = 0; j < n_scripts; j++) | |
769 | { | |
770 | DWORD script_id; | |
771 | OTF_DWORDTAG_VAL (tbl, scriptlist_table + 2 + j * 6, &script_id); | |
772 | if (script_id == script_tag) | |
773 | { | |
774 | OTF_INT16_VAL (tbl, scriptlist_table + 6 + j * 6, &script_table); | |
775 | break; | |
776 | } | |
595f1870 | 777 | #if 0 /* Causes false positives. */ |
e14dc92d JR |
778 | /* If there is a DFLT script defined in the font, use it |
779 | if the specified script is not found. */ | |
780 | else if (script_id == default_script) | |
781 | OTF_INT16_VAL (tbl, scriptlist_table + 6 + j * 6, &script_table); | |
595f1870 | 782 | #endif |
e14dc92d JR |
783 | } |
784 | /* If no specific or default script table was found, then this font | |
785 | does not support the script. */ | |
786 | if (!script_table) | |
787 | goto no_support; | |
788 | ||
789 | /* Offset is from beginning of scriptlist_table. */ | |
790 | script_table += scriptlist_table; | |
791 | ||
792 | /* Get default langsys table. */ | |
793 | OTF_INT16_VAL (tbl, script_table, &langsys_table); | |
794 | ||
795 | /* If lang was specified, see if font contains a specific entry. */ | |
796 | if (!NILP (lang)) | |
797 | { | |
798 | OTF_INT16_VAL (tbl, script_table + 2, &n_langs); | |
799 | ||
800 | for (j = 0; j < n_langs; j++) | |
801 | { | |
802 | DWORD lang_id; | |
803 | OTF_DWORDTAG_VAL (tbl, script_table + 4 + j * 6, &lang_id); | |
804 | if (lang_id == lang_tag) | |
805 | { | |
806 | OTF_INT16_VAL (tbl, script_table + 8 + j * 6, &langsys_table); | |
807 | break; | |
808 | } | |
809 | } | |
810 | } | |
811 | ||
812 | if (!langsys_table) | |
813 | goto no_support; | |
814 | ||
815 | /* Offset is from beginning of script table. */ | |
816 | langsys_table += script_table; | |
817 | ||
818 | /* Check the features. Features may contain nil according to | |
819 | documentation in font_prop_validate_otf, so count them. */ | |
820 | n_match_features = 0; | |
d0bfec76 | 821 | for (rest = features[i]; CONSP (rest); rest = XCDR (rest)) |
e14dc92d | 822 | { |
d0bfec76 | 823 | Lisp_Object feature = XCAR (rest); |
e14dc92d JR |
824 | if (!NILP (feature)) |
825 | n_match_features++; | |
826 | } | |
827 | ||
828 | /* If there are no features to check, skip checking. */ | |
829 | if (!n_match_features) | |
830 | continue; | |
831 | ||
832 | /* First check required feature (if any). */ | |
833 | OTF_INT16_VAL (tbl, langsys_table + 2, &feature_index); | |
834 | if (feature_index != 0xFFFF) | |
835 | { | |
836 | char feature_id[5]; | |
837 | OTF_TAG_VAL (tbl, feature_table + 2 + feature_index * 6, feature_id); | |
838 | OTF_TAG_VAL (tbl, feature_table + 2 + feature_index * 6, feature_id); | |
839 | /* Assume no duplicates in the font table. This allows us to mark | |
840 | the features off by simply decrementing a counter. */ | |
841 | if (!NILP (Fmemq (intern (feature_id), features[i]))) | |
842 | n_match_features--; | |
843 | } | |
844 | /* Now check all the other features. */ | |
845 | OTF_INT16_VAL (tbl, langsys_table + 4, &n_features); | |
846 | for (j = 0; j < n_features; j++) | |
847 | { | |
848 | char feature_id[5]; | |
849 | OTF_INT16_VAL (tbl, langsys_table + 6 + j * 2, &feature_index); | |
850 | OTF_TAG_VAL (tbl, feature_table + 2 + feature_index * 6, feature_id); | |
851 | /* Assume no duplicates in the font table. This allows us to mark | |
852 | the features off by simply decrementing a counter. */ | |
853 | if (!NILP (Fmemq (intern (feature_id), features[i]))) | |
854 | n_match_features--; | |
855 | } | |
856 | ||
857 | if (n_match_features > 0) | |
858 | goto no_support; | |
859 | } | |
860 | ||
861 | retval = 1; | |
862 | ||
863 | no_support: | |
864 | font_table_error: | |
865 | /* restore graphics context. */ | |
866 | SelectObject (context, old_font); | |
867 | DeleteObject (check_font); | |
868 | release_frame_dc (f, context); | |
869 | ||
870 | return retval; | |
871 | } | |
872 | ||
873 | static Lisp_Object | |
874 | otf_features (HDC context, char *table) | |
875 | { | |
876 | Lisp_Object script_list = Qnil; | |
877 | unsigned short scriptlist_table, n_scripts, feature_table; | |
878 | DWORD tbl = OTF_TAG (table); | |
879 | int i, j, k; | |
880 | ||
881 | /* Look for scripts in the table. */ | |
882 | OTF_INT16_VAL (tbl, 4, &scriptlist_table); | |
883 | OTF_INT16_VAL (tbl, 6, &feature_table); | |
884 | OTF_INT16_VAL (tbl, scriptlist_table, &n_scripts); | |
885 | ||
886 | for (i = 0; i < n_scripts; i++) | |
887 | { | |
888 | char script[5], lang[5]; | |
889 | unsigned short script_table, lang_count, langsys_table, feature_count; | |
890 | Lisp_Object script_tag, langsys_list, langsys_tag, feature_list; | |
891 | unsigned short record_offset = scriptlist_table + 2 + i * 6; | |
892 | OTF_TAG_VAL (tbl, record_offset, script); | |
893 | OTF_INT16_VAL (tbl, record_offset + 4, &script_table); | |
894 | ||
895 | /* Offset is from beginning of script table. */ | |
896 | script_table += scriptlist_table; | |
897 | ||
898 | script_tag = intern (script); | |
899 | langsys_list = Qnil; | |
900 | ||
901 | /* Optional default lang. */ | |
902 | OTF_INT16_VAL (tbl, script_table, &langsys_table); | |
903 | if (langsys_table) | |
904 | { | |
905 | /* Offset is from beginning of script table. */ | |
906 | langsys_table += script_table; | |
907 | ||
908 | langsys_tag = Qnil; | |
909 | feature_list = Qnil; | |
910 | OTF_INT16_VAL (tbl, langsys_table + 4, &feature_count); | |
911 | for (k = 0; k < feature_count; k++) | |
912 | { | |
913 | char feature[5]; | |
914 | unsigned short index; | |
915 | OTF_INT16_VAL (tbl, langsys_table + 6 + k * 2, &index); | |
916 | OTF_TAG_VAL (tbl, feature_table + 2 + index * 6, feature); | |
917 | feature_list = Fcons (intern (feature), feature_list); | |
918 | } | |
919 | langsys_list = Fcons (Fcons (langsys_tag, feature_list), | |
920 | langsys_list); | |
921 | } | |
922 | ||
923 | /* List of supported languages. */ | |
924 | OTF_INT16_VAL (tbl, script_table + 2, &lang_count); | |
925 | ||
926 | for (j = 0; j < lang_count; j++) | |
927 | { | |
928 | record_offset = script_table + 4 + j * 6; | |
929 | OTF_TAG_VAL (tbl, record_offset, lang); | |
930 | OTF_INT16_VAL (tbl, record_offset + 4, &langsys_table); | |
931 | ||
932 | /* Offset is from beginning of script table. */ | |
933 | langsys_table += script_table; | |
934 | ||
935 | langsys_tag = intern (lang); | |
936 | feature_list = Qnil; | |
937 | OTF_INT16_VAL (tbl, langsys_table + 4, &feature_count); | |
938 | for (k = 0; k < feature_count; k++) | |
939 | { | |
940 | char feature[5]; | |
941 | unsigned short index; | |
942 | OTF_INT16_VAL (tbl, langsys_table + 6 + k * 2, &index); | |
943 | OTF_TAG_VAL (tbl, feature_table + 2 + index * 6, feature); | |
944 | feature_list = Fcons (intern (feature), feature_list); | |
945 | } | |
946 | langsys_list = Fcons (Fcons (langsys_tag, feature_list), | |
947 | langsys_list); | |
948 | ||
949 | } | |
950 | ||
951 | script_list = Fcons (Fcons (script_tag, langsys_list), script_list); | |
952 | } | |
953 | ||
954 | return script_list; | |
955 | ||
956 | font_table_error: | |
957 | return Qnil; | |
958 | } | |
959 | ||
960 | #undef OTF_INT16_VAL | |
961 | #undef OTF_TAG_VAL | |
962 | #undef OTF_TAG | |
963 | ||
964 | \f | |
965 | struct font_driver uniscribe_font_driver = | |
966 | { | |
967 | 0, /* Quniscribe */ | |
fd302b02 | 968 | 0, /* case insensitive */ |
e14dc92d JR |
969 | w32font_get_cache, |
970 | uniscribe_list, | |
971 | uniscribe_match, | |
972 | uniscribe_list_family, | |
973 | NULL, /* free_entity */ | |
974 | uniscribe_open, | |
975 | uniscribe_close, | |
976 | NULL, /* prepare_face */ | |
977 | NULL, /* done_face */ | |
978 | w32font_has_char, | |
979 | uniscribe_encode_char, | |
980 | w32font_text_extents, | |
981 | w32font_draw, | |
982 | NULL, /* get_bitmap */ | |
983 | NULL, /* free_bitmap */ | |
984 | NULL, /* get_outline */ | |
985 | NULL, /* free_outline */ | |
986 | NULL, /* anchor_point */ | |
b56ceb92 | 987 | uniscribe_otf_capability, /* Defined so (font-get FONTOBJ :otf) works. */ |
e14dc92d JR |
988 | NULL, /* otf_drive - use shape instead. */ |
989 | NULL, /* start_for_frame */ | |
990 | NULL, /* end_for_frame */ | |
9c88f339 JB |
991 | uniscribe_shape, |
992 | NULL, /* check */ | |
993 | NULL, /* get_variation_glyphs */ | |
994 | NULL, /* filter_properties */ | |
995 | NULL, /* cached_font_ok */ | |
e14dc92d JR |
996 | }; |
997 | ||
998 | /* Note that this should be called at every startup, not just when dumping, | |
999 | as it needs to test for the existence of the Uniscribe library. */ | |
1000 | void | |
b56ceb92 | 1001 | syms_of_w32uniscribe (void) |
e14dc92d JR |
1002 | { |
1003 | HMODULE uniscribe; | |
1004 | ||
1005 | /* Don't init uniscribe when dumping */ | |
1006 | if (!initialized) | |
1007 | return; | |
1008 | ||
1009 | /* Don't register if uniscribe is not available. */ | |
1010 | uniscribe = GetModuleHandle ("usp10"); | |
1011 | if (!uniscribe) | |
1012 | return; | |
1013 | ||
1014 | uniscribe_font_driver.type = Quniscribe; | |
1015 | uniscribe_available = 1; | |
1016 | ||
1017 | register_font_driver (&uniscribe_font_driver, NULL); | |
1018 | } |