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e14dc92d | 1 | /* Font backend for the Microsoft W32 Uniscribe API. |
acaf905b | 2 | Copyright (C) 2008-2012 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 | |
b56ceb92 | 72 | uniscribe_list (Lisp_Object frame, Lisp_Object font_spec) |
e14dc92d | 73 | { |
07d9ba9b | 74 | Lisp_Object fonts = w32font_list_internal (frame, 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 | |
b56ceb92 | 80 | uniscribe_match (Lisp_Object frame, Lisp_Object font_spec) |
e14dc92d | 81 | { |
07d9ba9b | 82 | Lisp_Object entity = w32font_match_internal (frame, 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 | |
b56ceb92 | 88 | uniscribe_list_family (Lisp_Object frame) |
e14dc92d JR |
89 | { |
90 | Lisp_Object list = Qnil; | |
91 | LOGFONT font_match_pattern; | |
92 | HDC dc; | |
93 | FRAME_PTR f = XFRAME (frame); | |
94 | ||
72af86bd | 95 | memset (&font_match_pattern, 0, sizeof (font_match_pattern)); |
e14dc92d JR |
96 | /* Limit enumerated fonts to outline fonts to save time. */ |
97 | font_match_pattern.lfOutPrecision = OUT_OUTLINE_PRECIS; | |
98 | ||
99 | dc = get_frame_dc (f); | |
100 | ||
101 | EnumFontFamiliesEx (dc, &font_match_pattern, | |
102 | (FONTENUMPROC) add_opentype_font_name_to_list, | |
103 | (LPARAM) &list, 0); | |
104 | release_frame_dc (f, dc); | |
105 | ||
106 | return list; | |
107 | } | |
108 | ||
fd302b02 | 109 | static Lisp_Object |
b56ceb92 | 110 | uniscribe_open (FRAME_PTR f, Lisp_Object font_entity, int pixel_size) |
e14dc92d | 111 | { |
fd302b02 | 112 | Lisp_Object font_object |
e83ceb8b KH |
113 | = font_make_object (VECSIZE (struct uniscribe_font_info), |
114 | font_entity, pixel_size); | |
e14dc92d | 115 | struct uniscribe_font_info *uniscribe_font |
fd302b02 | 116 | = (struct uniscribe_font_info *) XFONT_OBJECT (font_object); |
e14dc92d | 117 | |
4b135503 JR |
118 | ASET (font_object, FONT_TYPE_INDEX, Quniscribe); |
119 | ||
fd302b02 | 120 | if (!w32font_open_internal (f, font_entity, pixel_size, font_object)) |
e14dc92d | 121 | { |
fd302b02 | 122 | return Qnil; |
e14dc92d JR |
123 | } |
124 | ||
125 | /* Initialize the cache for this font. */ | |
126 | uniscribe_font->cache = NULL; | |
11856d4d | 127 | |
bd187c49 JR |
128 | /* Uniscribe backend uses glyph indices. */ |
129 | uniscribe_font->w32_font.glyph_idx = ETO_GLYPH_INDEX; | |
130 | ||
e14dc92d | 131 | /* Mark the format as opentype */ |
fd302b02 | 132 | uniscribe_font->w32_font.font.props[FONT_FORMAT_INDEX] = Qopentype; |
e14dc92d JR |
133 | uniscribe_font->w32_font.font.driver = &uniscribe_font_driver; |
134 | ||
fd302b02 | 135 | return font_object; |
e14dc92d JR |
136 | } |
137 | ||
138 | static void | |
b56ceb92 | 139 | uniscribe_close (FRAME_PTR f, struct font *font) |
e14dc92d JR |
140 | { |
141 | struct uniscribe_font_info *uniscribe_font | |
142 | = (struct uniscribe_font_info *) font; | |
143 | ||
144 | if (uniscribe_font->cache) | |
11856d4d | 145 | ScriptFreeCache (&(uniscribe_font->cache)); |
e14dc92d JR |
146 | |
147 | w32font_close (f, font); | |
148 | } | |
149 | ||
150 | /* Return a list describing which scripts/languages FONT supports by | |
151 | which GSUB/GPOS features of OpenType tables. */ | |
152 | static Lisp_Object | |
b56ceb92 | 153 | uniscribe_otf_capability (struct font *font) |
e14dc92d JR |
154 | { |
155 | HDC context; | |
156 | HFONT old_font; | |
157 | struct frame *f; | |
158 | Lisp_Object capability = Fcons (Qnil, Qnil); | |
159 | Lisp_Object features; | |
160 | ||
161 | f = XFRAME (selected_frame); | |
162 | context = get_frame_dc (f); | |
ed3751c8 | 163 | old_font = SelectObject (context, FONT_HANDLE (font)); |
e14dc92d JR |
164 | |
165 | features = otf_features (context, "GSUB"); | |
166 | XSETCAR (capability, features); | |
167 | features = otf_features (context, "GPOS"); | |
168 | XSETCDR (capability, features); | |
169 | ||
170 | SelectObject (context, old_font); | |
171 | release_frame_dc (f, context); | |
172 | ||
173 | return capability; | |
174 | } | |
175 | ||
176 | /* Uniscribe implementation of shape for font backend. | |
177 | ||
6e6b8e25 EZ |
178 | Shape text in LGSTRING. See the docstring of |
179 | `composition-get-gstring' for the format of LGSTRING. If the | |
180 | (N+1)th element of LGSTRING is nil, input of shaping is from the | |
181 | 1st to (N)th elements. In each input glyph, FROM, TO, CHAR, and | |
182 | CODE are already set. | |
e14dc92d JR |
183 | |
184 | This function updates all fields of the input glyphs. If the | |
185 | output glyphs (M) are more than the input glyphs (N), (N+1)th | |
186 | through (M)th elements of LGSTRING are updated possibly by making | |
187 | a new glyph object and storing it in LGSTRING. If (M) is greater | |
6e6b8e25 EZ |
188 | than the length of LGSTRING, nil should be returned. In that case, |
189 | this function is called again with a larger LGSTRING. */ | |
e14dc92d | 190 | static Lisp_Object |
b56ceb92 | 191 | uniscribe_shape (Lisp_Object lgstring) |
e14dc92d JR |
192 | { |
193 | struct font * font; | |
194 | struct uniscribe_font_info * uniscribe_font; | |
195 | EMACS_UINT nchars; | |
0ce24b2d | 196 | int nitems, max_items, i, max_glyphs, done_glyphs; |
e14dc92d JR |
197 | wchar_t *chars; |
198 | WORD *glyphs, *clusters; | |
199 | SCRIPT_ITEM *items; | |
e14dc92d JR |
200 | SCRIPT_VISATTR *attributes; |
201 | int *advances; | |
202 | GOFFSET *offsets; | |
203 | ABC overall_metrics; | |
e14dc92d | 204 | HRESULT result; |
c320e90a JR |
205 | struct frame * f = NULL; |
206 | HDC context = NULL; | |
207 | HFONT old_font = NULL; | |
e14dc92d JR |
208 | |
209 | CHECK_FONT_GET_OBJECT (LGSTRING_FONT (lgstring), font); | |
210 | uniscribe_font = (struct uniscribe_font_info *) font; | |
211 | ||
212 | /* Get the chars from lgstring in a form we can use with uniscribe. */ | |
716e6ba3 | 213 | max_glyphs = nchars = LGSTRING_GLYPH_LEN (lgstring); |
0ce24b2d | 214 | done_glyphs = 0; |
e14dc92d | 215 | chars = (wchar_t *) alloca (nchars * sizeof (wchar_t)); |
6e6b8e25 EZ |
216 | /* FIXME: This loop assumes that characters in the input LGSTRING |
217 | are all inside the BMP. Need to encode characters beyond the BMP | |
218 | as UTF-16. */ | |
e14dc92d JR |
219 | for (i = 0; i < nchars; i++) |
220 | { | |
221 | /* lgstring can be bigger than the number of characters in it, in | |
222 | the case where more glyphs are required to display those characters. | |
223 | If that is the case, note the real number of characters. */ | |
224 | if (NILP (LGSTRING_GLYPH (lgstring, i))) | |
225 | nchars = i; | |
226 | else | |
227 | chars[i] = LGLYPH_CHAR (LGSTRING_GLYPH (lgstring, i)); | |
228 | } | |
229 | ||
230 | /* First we need to break up the glyph string into runs of glyphs that | |
231 | can be treated together. First try a single run. */ | |
232 | max_items = 2; | |
23f86fce | 233 | items = xmalloc (sizeof (SCRIPT_ITEM) * max_items + 1); |
e14dc92d | 234 | |
11856d4d | 235 | while ((result = ScriptItemize (chars, nchars, max_items, NULL, NULL, |
e14dc92d JR |
236 | items, &nitems)) == E_OUTOFMEMORY) |
237 | { | |
238 | /* If that wasn't enough, keep trying with one more run. */ | |
239 | max_items++; | |
240 | items = (SCRIPT_ITEM *) xrealloc (items, | |
0ce24b2d | 241 | sizeof (SCRIPT_ITEM) * max_items + 1); |
e14dc92d JR |
242 | } |
243 | ||
c320e90a | 244 | if (FAILED (result)) |
e14dc92d JR |
245 | { |
246 | xfree (items); | |
247 | return Qnil; | |
248 | } | |
249 | ||
e14dc92d JR |
250 | glyphs = alloca (max_glyphs * sizeof (WORD)); |
251 | clusters = alloca (nchars * sizeof (WORD)); | |
252 | attributes = alloca (max_glyphs * sizeof (SCRIPT_VISATTR)); | |
253 | advances = alloca (max_glyphs * sizeof (int)); | |
254 | offsets = alloca (max_glyphs * sizeof (GOFFSET)); | |
e14dc92d JR |
255 | |
256 | for (i = 0; i < nitems; i++) | |
257 | { | |
6e6b8e25 | 258 | int nglyphs, nchars_in_run; |
e14dc92d | 259 | nchars_in_run = items[i+1].iCharPos - items[i].iCharPos; |
6e6b8e25 EZ |
260 | /* Force ScriptShape to generate glyphs in the same order as |
261 | they are in the input LGSTRING, which is in the logical | |
262 | order. */ | |
263 | items[i].a.fLogicalOrder = 1; | |
e14dc92d | 264 | |
c320e90a JR |
265 | /* Context may be NULL here, in which case the cache should be |
266 | used without needing to select the font. */ | |
e14dc92d JR |
267 | result = ScriptShape (context, &(uniscribe_font->cache), |
268 | chars + items[i].iCharPos, nchars_in_run, | |
269 | max_glyphs - done_glyphs, &(items[i].a), | |
270 | glyphs, clusters, attributes, &nglyphs); | |
c320e90a JR |
271 | |
272 | if (result == E_PENDING && !context) | |
273 | { | |
274 | /* This assumes the selected frame is on the same display as the | |
275 | one we are drawing. It would be better for the frame to be | |
276 | passed in. */ | |
277 | f = XFRAME (selected_frame); | |
278 | context = get_frame_dc (f); | |
ed3751c8 | 279 | old_font = SelectObject (context, FONT_HANDLE (font)); |
c320e90a JR |
280 | |
281 | result = ScriptShape (context, &(uniscribe_font->cache), | |
282 | chars + items[i].iCharPos, nchars_in_run, | |
283 | max_glyphs - done_glyphs, &(items[i].a), | |
284 | glyphs, clusters, attributes, &nglyphs); | |
285 | } | |
286 | ||
e14dc92d JR |
287 | if (result == E_OUTOFMEMORY) |
288 | { | |
289 | /* Need a bigger lgstring. */ | |
290 | lgstring = Qnil; | |
291 | break; | |
292 | } | |
c320e90a | 293 | else if (FAILED (result)) |
e14dc92d JR |
294 | { |
295 | /* Can't shape this run - return results so far if any. */ | |
296 | break; | |
297 | } | |
0ce24b2d JR |
298 | else if (items[i].a.fNoGlyphIndex) |
299 | { | |
300 | /* Glyph indices not supported by this font (or OS), means we | |
301 | can't really do any meaningful shaping. */ | |
302 | break; | |
303 | } | |
e14dc92d JR |
304 | else |
305 | { | |
306 | result = ScriptPlace (context, &(uniscribe_font->cache), | |
307 | glyphs, nglyphs, attributes, &(items[i].a), | |
308 | advances, offsets, &overall_metrics); | |
c320e90a JR |
309 | if (result == E_PENDING && !context) |
310 | { | |
311 | /* Cache not complete... */ | |
312 | f = XFRAME (selected_frame); | |
313 | context = get_frame_dc (f); | |
ed3751c8 | 314 | old_font = SelectObject (context, FONT_HANDLE (font)); |
c320e90a JR |
315 | |
316 | result = ScriptPlace (context, &(uniscribe_font->cache), | |
317 | glyphs, nglyphs, attributes, &(items[i].a), | |
318 | advances, offsets, &overall_metrics); | |
319 | } | |
320 | if (SUCCEEDED (result)) | |
e14dc92d | 321 | { |
b2f09701 EZ |
322 | int j, from, to, adj_offset = 0; |
323 | ||
6e6b8e25 | 324 | from = 0; |
b7655e0c | 325 | to = from; |
e14dc92d JR |
326 | |
327 | for (j = 0; j < nglyphs; j++) | |
328 | { | |
329 | int lglyph_index = j + done_glyphs; | |
330 | Lisp_Object lglyph = LGSTRING_GLYPH (lgstring, lglyph_index); | |
0ce24b2d | 331 | ABC char_metric; |
4bf84f7d | 332 | unsigned gl; |
e14dc92d JR |
333 | |
334 | if (NILP (lglyph)) | |
335 | { | |
336 | lglyph = Fmake_vector (make_number (LGLYPH_SIZE), Qnil); | |
337 | LGSTRING_SET_GLYPH (lgstring, lglyph_index, lglyph); | |
338 | } | |
4bf84f7d EZ |
339 | /* Copy to a 32-bit data type to shut up the |
340 | compiler warning in LGLYPH_SET_CODE about | |
341 | comparison being always false. */ | |
342 | gl = glyphs[j]; | |
343 | LGLYPH_SET_CODE (lglyph, gl); | |
0ce24b2d | 344 | |
6e6b8e25 EZ |
345 | /* Detect clusters, for linking codes back to |
346 | characters. */ | |
0ce24b2d | 347 | if (attributes[j].fClusterStart) |
e14dc92d | 348 | { |
6e6b8e25 EZ |
349 | while (from < nchars_in_run && clusters[from] < j) |
350 | from++; | |
351 | if (from >= nchars_in_run) | |
b7655e0c | 352 | from = to = nchars_in_run - 1; |
0ce24b2d JR |
353 | else |
354 | { | |
355 | int k; | |
6e6b8e25 EZ |
356 | to = nchars_in_run - 1; |
357 | for (k = from + 1; k < nchars_in_run; k++) | |
0ce24b2d JR |
358 | { |
359 | if (clusters[k] > j) | |
360 | { | |
b7655e0c | 361 | to = k - 1; |
0ce24b2d JR |
362 | break; |
363 | } | |
364 | } | |
365 | } | |
7e510e28 EZ |
366 | |
367 | /* For RTL text, the Uniscribe shaper prepares | |
368 | the values in ADVANCES array for layout in | |
369 | reverse order, whereby "advance width" is | |
370 | applied to move the pen in reverse direction | |
371 | and _before_ drawing the glyph. Since we | |
372 | draw glyphs in their normal left-to-right | |
373 | order, we need to adjust the coordinates of | |
374 | each non-base glyph in a grapheme cluster via | |
375 | X-OFF component of the gstring's ADJUSTMENT | |
376 | sub-vector. This loop computes, for each | |
377 | grapheme cluster, the initial value of the | |
378 | adjustment for the base character, which is | |
379 | then updated for each successive glyph in the | |
380 | grapheme cluster. */ | |
381 | if (items[i].a.fRTL) | |
382 | { | |
383 | int j1 = j; | |
384 | ||
385 | adj_offset = 0; | |
386 | while (j1 < nglyphs && !attributes[j1].fClusterStart) | |
387 | { | |
388 | adj_offset += advances[j1]; | |
389 | j1++; | |
390 | } | |
391 | } | |
e14dc92d | 392 | } |
e14dc92d | 393 | |
b7655e0c JR |
394 | LGLYPH_SET_CHAR (lglyph, chars[items[i].iCharPos |
395 | + from]); | |
396 | LGLYPH_SET_FROM (lglyph, items[i].iCharPos + from); | |
397 | LGLYPH_SET_TO (lglyph, items[i].iCharPos + to); | |
e14dc92d | 398 | |
0ce24b2d JR |
399 | /* Metrics. */ |
400 | LGLYPH_SET_WIDTH (lglyph, advances[j]); | |
401 | LGLYPH_SET_ASCENT (lglyph, font->ascent); | |
402 | LGLYPH_SET_DESCENT (lglyph, font->descent); | |
403 | ||
404 | result = ScriptGetGlyphABCWidth (context, | |
405 | &(uniscribe_font->cache), | |
406 | glyphs[j], &char_metric); | |
c320e90a JR |
407 | if (result == E_PENDING && !context) |
408 | { | |
409 | /* Cache incomplete... */ | |
410 | f = XFRAME (selected_frame); | |
411 | context = get_frame_dc (f); | |
ed3751c8 | 412 | old_font = SelectObject (context, FONT_HANDLE (font)); |
c320e90a JR |
413 | result = ScriptGetGlyphABCWidth (context, |
414 | &(uniscribe_font->cache), | |
415 | glyphs[j], &char_metric); | |
416 | } | |
e14dc92d | 417 | |
11856d4d | 418 | if (SUCCEEDED (result)) |
0ce24b2d | 419 | { |
b2f09701 EZ |
420 | int lbearing = char_metric.abcA; |
421 | int rbearing = char_metric.abcA + char_metric.abcB; | |
422 | ||
423 | LGLYPH_SET_LBEARING (lglyph, lbearing); | |
424 | LGLYPH_SET_RBEARING (lglyph, rbearing); | |
0ce24b2d JR |
425 | } |
426 | else | |
e14dc92d | 427 | { |
0ce24b2d JR |
428 | LGLYPH_SET_LBEARING (lglyph, 0); |
429 | LGLYPH_SET_RBEARING (lglyph, advances[j]); | |
e14dc92d | 430 | } |
0ce24b2d | 431 | |
b2f09701 EZ |
432 | if (offsets[j].du || offsets[j].dv |
433 | /* For non-base glyphs of RTL grapheme clusters, | |
434 | adjust the X offset even if both DU and DV | |
435 | are zero. */ | |
436 | || (!attributes[j].fClusterStart && items[i].a.fRTL)) | |
e14dc92d | 437 | { |
0ce24b2d JR |
438 | Lisp_Object vec; |
439 | vec = Fmake_vector (make_number (3), Qnil); | |
b2f09701 EZ |
440 | if (items[i].a.fRTL) |
441 | { | |
442 | /* Empirically, it looks like Uniscribe | |
443 | interprets DU in reverse direction for | |
444 | RTL clusters. E.g., if we don't reverse | |
445 | the direction, the Hebrew point HOLAM is | |
446 | drawn above the right edge of the base | |
447 | consonant, instead of above the left edge. */ | |
448 | ASET (vec, 0, make_number (-offsets[j].du | |
449 | + adj_offset)); | |
450 | /* Update the adjustment value for the width | |
451 | advance of the glyph we just emitted. */ | |
452 | adj_offset -= 2 * advances[j]; | |
453 | } | |
454 | else | |
455 | ASET (vec, 0, make_number (offsets[j].du + adj_offset)); | |
30934d33 EZ |
456 | /* In the font definition coordinate system, the |
457 | Y coordinate points up, while in our screen | |
458 | coordinates Y grows downwards. So we need to | |
459 | reverse the sign of Y-OFFSET here. */ | |
460 | ASET (vec, 1, make_number (-offsets[j].dv)); | |
0ce24b2d JR |
461 | /* Based on what ftfont.c does... */ |
462 | ASET (vec, 2, make_number (advances[j])); | |
463 | LGLYPH_SET_ADJUSTMENT (lglyph, vec); | |
e14dc92d | 464 | } |
0ce24b2d | 465 | else |
b2f09701 EZ |
466 | { |
467 | LGLYPH_SET_ADJUSTMENT (lglyph, Qnil); | |
468 | /* Update the adjustment value to compensate for | |
469 | the width of the base character. */ | |
470 | if (items[i].a.fRTL) | |
471 | adj_offset -= advances[j]; | |
472 | } | |
c320e90a JR |
473 | } |
474 | } | |
e14dc92d JR |
475 | } |
476 | done_glyphs += nglyphs; | |
e14dc92d JR |
477 | } |
478 | ||
479 | xfree (items); | |
c320e90a JR |
480 | |
481 | if (context) | |
482 | { | |
483 | SelectObject (context, old_font); | |
484 | release_frame_dc (f, context); | |
485 | } | |
e14dc92d JR |
486 | |
487 | if (NILP (lgstring)) | |
488 | return Qnil; | |
489 | else | |
0ce24b2d | 490 | return make_number (done_glyphs); |
e14dc92d JR |
491 | } |
492 | ||
493 | /* Uniscribe implementation of encode_char for font backend. | |
51e4f4a8 | 494 | Return a glyph code of FONT for character C (Unicode code point). |
e14dc92d JR |
495 | If FONT doesn't have such a glyph, return FONT_INVALID_CODE. */ |
496 | static unsigned | |
b56ceb92 | 497 | uniscribe_encode_char (struct font *font, int c) |
e14dc92d | 498 | { |
c320e90a JR |
499 | HDC context = NULL; |
500 | struct frame *f = NULL; | |
501 | HFONT old_font = NULL; | |
11856d4d | 502 | unsigned code = FONT_INVALID_CODE; |
c320e90a JR |
503 | wchar_t ch[2]; |
504 | int len; | |
505 | SCRIPT_ITEM* items; | |
506 | int nitems; | |
507 | struct uniscribe_font_info *uniscribe_font | |
508 | = (struct uniscribe_font_info *)font; | |
11856d4d | 509 | |
11856d4d JR |
510 | if (c < 0x10000) |
511 | { | |
c320e90a JR |
512 | ch[0] = (wchar_t) c; |
513 | len = 1; | |
11856d4d | 514 | } |
11856d4d | 515 | else |
f31cf550 JR |
516 | { |
517 | DWORD surrogate = c - 0x10000; | |
e14dc92d | 518 | |
f31cf550 | 519 | /* High surrogate: U+D800 - U+DBFF. */ |
11856d4d | 520 | ch[0] = 0xD800 + ((surrogate >> 10) & 0x03FF); |
f31cf550 | 521 | /* Low surrogate: U+DC00 - U+DFFF. */ |
11856d4d | 522 | ch[1] = 0xDC00 + (surrogate & 0x03FF); |
c320e90a JR |
523 | len = 2; |
524 | } | |
11856d4d | 525 | |
c320e90a JR |
526 | /* Non BMP characters must be handled by the uniscribe shaping |
527 | engine as GDI functions (except blindly displaying lines of | |
fe7a3057 | 528 | Unicode text) and the promising looking ScriptGetCMap do not |
c320e90a JR |
529 | convert surrogate pairs to glyph indexes correctly. */ |
530 | { | |
11856d4d | 531 | items = (SCRIPT_ITEM *) alloca (sizeof (SCRIPT_ITEM) * 2 + 1); |
c320e90a JR |
532 | if (SUCCEEDED (ScriptItemize (ch, len, 2, NULL, NULL, items, &nitems))) |
533 | { | |
534 | HRESULT result; | |
b4233ec9 JR |
535 | /* Surrogates seem to need 2 here, even though only one glyph is |
536 | returned. Indic characters can also produce 2 or more glyphs for | |
537 | a single code point, but they need to use uniscribe_shape | |
538 | above for correct display. */ | |
539 | WORD glyphs[2], clusters[2]; | |
540 | SCRIPT_VISATTR attrs[2]; | |
11856d4d JR |
541 | int nglyphs; |
542 | ||
6e6b8e25 EZ |
543 | /* Force ScriptShape to generate glyphs in the logical |
544 | order. */ | |
545 | items[0].a.fLogicalOrder = 1; | |
546 | ||
c320e90a | 547 | result = ScriptShape (context, &(uniscribe_font->cache), |
b4233ec9 | 548 | ch, len, 2, &(items[0].a), |
c320e90a JR |
549 | glyphs, clusters, attrs, &nglyphs); |
550 | ||
551 | if (result == E_PENDING) | |
552 | { | |
553 | /* Use selected frame until API is updated to pass | |
554 | the frame. */ | |
555 | f = XFRAME (selected_frame); | |
556 | context = get_frame_dc (f); | |
ed3751c8 | 557 | old_font = SelectObject (context, FONT_HANDLE (font)); |
c320e90a JR |
558 | result = ScriptShape (context, &(uniscribe_font->cache), |
559 | ch, len, 2, &(items[0].a), | |
560 | glyphs, clusters, attrs, &nglyphs); | |
561 | } | |
562 | ||
563 | if (SUCCEEDED (result) && nglyphs == 1) | |
11856d4d | 564 | { |
1fc200d6 | 565 | /* Some fonts return .notdef glyphs instead of failing. |
7877f373 | 566 | (TrueType spec reserves glyph code 0 for .notdef) */ |
1fc200d6 JR |
567 | if (glyphs[0]) |
568 | code = glyphs[0]; | |
11856d4d | 569 | } |
c320e90a JR |
570 | else if (SUCCEEDED (result) || result == E_OUTOFMEMORY) |
571 | { | |
572 | /* This character produces zero or more than one glyph | |
573 | when shaped. But we still need the return from here | |
574 | to be valid for the shaping engine to be invoked | |
575 | later. */ | |
576 | result = ScriptGetCMap (context, &(uniscribe_font->cache), | |
577 | ch, len, 0, glyphs); | |
1fc200d6 | 578 | if (SUCCEEDED (result) && glyphs[0]) |
a608bcbf | 579 | code = glyphs[0]; |
c320e90a JR |
580 | } |
581 | } | |
f31cf550 | 582 | } |
c320e90a JR |
583 | if (context) |
584 | { | |
585 | SelectObject (context, old_font); | |
586 | release_frame_dc (f, context); | |
587 | } | |
e14dc92d | 588 | |
c320e90a | 589 | return code; |
e14dc92d JR |
590 | } |
591 | ||
592 | /* | |
593 | Shared with w32font: | |
594 | Lisp_Object uniscribe_get_cache (Lisp_Object frame); | |
595 | void uniscribe_free_entity (Lisp_Object font_entity); | |
596 | int uniscribe_has_char (Lisp_Object entity, int c); | |
597 | int uniscribe_text_extents (struct font *font, unsigned *code, | |
598 | int nglyphs, struct font_metrics *metrics); | |
599 | int uniscribe_draw (struct glyph_string *s, int from, int to, | |
600 | int x, int y, int with_background); | |
601 | ||
602 | Unused: | |
603 | int uniscribe_prepare_face (FRAME_PTR f, struct face *face); | |
604 | void uniscribe_done_face (FRAME_PTR f, struct face *face); | |
605 | int uniscribe_get_bitmap (struct font *font, unsigned code, | |
606 | struct font_bitmap *bitmap, int bits_per_pixel); | |
607 | void uniscribe_free_bitmap (struct font *font, struct font_bitmap *bitmap); | |
608 | void * uniscribe_get_outline (struct font *font, unsigned code); | |
609 | void uniscribe_free_outline (struct font *font, void *outline); | |
610 | int uniscribe_anchor_point (struct font *font, unsigned code, | |
611 | int index, int *x, int *y); | |
612 | int uniscribe_start_for_frame (FRAME_PTR f); | |
613 | int uniscribe_end_for_frame (FRAME_PTR f); | |
614 | ||
615 | */ | |
616 | ||
617 | \f | |
618 | /* Callback function for EnumFontFamiliesEx. | |
619 | Adds the name of opentype fonts to a Lisp list (passed in as the | |
620 | lParam arg). */ | |
621 | static int CALLBACK | |
b56ceb92 JB |
622 | add_opentype_font_name_to_list (ENUMLOGFONTEX *logical_font, |
623 | NEWTEXTMETRICEX *physical_font, | |
624 | DWORD font_type, LPARAM list_object) | |
e14dc92d JR |
625 | { |
626 | Lisp_Object* list = (Lisp_Object *) list_object; | |
627 | Lisp_Object family; | |
628 | ||
629 | /* Skip vertical fonts (intended only for printing) */ | |
630 | if (logical_font->elfLogFont.lfFaceName[0] == '@') | |
631 | return 1; | |
632 | ||
633 | /* Skip non opentype fonts. Count old truetype fonts as opentype, | |
634 | as some of them do contain GPOS and GSUB data that Uniscribe | |
635 | can make use of. */ | |
636 | if (!(physical_font->ntmTm.ntmFlags & NTMFLAGS_OPENTYPE) | |
637 | && font_type != TRUETYPE_FONTTYPE) | |
638 | return 1; | |
639 | ||
fe7a3057 | 640 | /* Skip fonts that have no Unicode coverage. */ |
351ccb76 JR |
641 | if (!physical_font->ntmFontSig.fsUsb[3] |
642 | && !physical_font->ntmFontSig.fsUsb[2] | |
643 | && !physical_font->ntmFontSig.fsUsb[1] | |
644 | && !(physical_font->ntmFontSig.fsUsb[0] & 0x3fffffff)) | |
645 | return 1; | |
646 | ||
e6df5336 | 647 | family = intern_font_name (logical_font->elfLogFont.lfFaceName); |
e14dc92d JR |
648 | if (! memq_no_quit (family, *list)) |
649 | *list = Fcons (family, *list); | |
650 | ||
651 | return 1; | |
652 | } | |
653 | ||
654 | \f | |
655 | /* :otf property handling. | |
656 | Since the necessary Uniscribe APIs for getting font tag information | |
657 | are only available in Vista, we need to parse the font data directly | |
658 | according to the OpenType Specification. */ | |
659 | ||
660 | /* Push into DWORD backwards to cope with endianness. */ | |
661 | #define OTF_TAG(STR) \ | |
662 | ((STR[3] << 24) | (STR[2] << 16) | (STR[1] << 8) | STR[0]) | |
663 | ||
664 | #define OTF_INT16_VAL(TABLE, OFFSET, PTR) \ | |
665 | do { \ | |
666 | BYTE temp, data[2]; \ | |
667 | if (GetFontData (context, TABLE, OFFSET, data, 2) != 2) \ | |
668 | goto font_table_error; \ | |
669 | temp = data[0], data[0] = data[1], data[1] = temp; \ | |
670 | memcpy (PTR, data, 2); \ | |
671 | } while (0) | |
672 | ||
673 | /* Do not reverse the bytes, because we will compare with a OTF_TAG value | |
674 | that has them reversed already. */ | |
675 | #define OTF_DWORDTAG_VAL(TABLE, OFFSET, PTR) \ | |
676 | do { \ | |
677 | if (GetFontData (context, TABLE, OFFSET, PTR, 4) != 4) \ | |
678 | goto font_table_error; \ | |
679 | } while (0) | |
680 | ||
681 | #define OTF_TAG_VAL(TABLE, OFFSET, STR) \ | |
682 | do { \ | |
683 | if (GetFontData (context, TABLE, OFFSET, STR, 4) != 4) \ | |
684 | goto font_table_error; \ | |
685 | STR[4] = '\0'; \ | |
686 | } while (0) | |
687 | ||
3bf8d230 | 688 | #define SNAME(VAL) SDATA (SYMBOL_NAME (VAL)) |
e14dc92d JR |
689 | |
690 | /* Check if font supports the otf script/language/features specified. | |
691 | OTF_SPEC is in the format | |
692 | (script lang [(gsub_feature ...)|nil] [(gpos_feature ...)]?) */ | |
b56ceb92 JB |
693 | int |
694 | uniscribe_check_otf (LOGFONT *font, Lisp_Object otf_spec) | |
e14dc92d JR |
695 | { |
696 | Lisp_Object script, lang, rest; | |
697 | Lisp_Object features[2]; | |
698 | DWORD feature_tables[2]; | |
699 | DWORD script_tag, default_script, lang_tag = 0; | |
700 | struct frame * f; | |
701 | HDC context; | |
702 | HFONT check_font, old_font; | |
e14dc92d | 703 | int i, retval = 0; |
e38ac6e2 | 704 | struct gcpro gcpro1; |
e14dc92d | 705 | |
6b8aa22a | 706 | /* Check the spec is in the right format. */ |
df7e1ea0 | 707 | if (!CONSP (otf_spec) || XINT (Flength (otf_spec)) < 3) |
6b8aa22a JR |
708 | return 0; |
709 | ||
e14dc92d JR |
710 | /* Break otf_spec into its components. */ |
711 | script = XCAR (otf_spec); | |
712 | rest = XCDR (otf_spec); | |
713 | ||
714 | lang = XCAR (rest); | |
715 | rest = XCDR (rest); | |
716 | ||
717 | features[0] = XCAR (rest); | |
718 | rest = XCDR (rest); | |
719 | if (NILP (rest)) | |
720 | features[1] = Qnil; | |
721 | else | |
722 | features[1] = XCAR (rest); | |
723 | ||
724 | /* Set up tags we will use in the search. */ | |
725 | feature_tables[0] = OTF_TAG ("GSUB"); | |
726 | feature_tables[1] = OTF_TAG ("GPOS"); | |
727 | default_script = OTF_TAG ("DFLT"); | |
728 | if (NILP (script)) | |
729 | script_tag = default_script; | |
730 | else | |
731 | script_tag = OTF_TAG (SNAME (script)); | |
732 | if (!NILP (lang)) | |
733 | lang_tag = OTF_TAG (SNAME (lang)); | |
734 | ||
735 | /* Set up graphics context so we can use the font. */ | |
736 | f = XFRAME (selected_frame); | |
737 | context = get_frame_dc (f); | |
738 | check_font = CreateFontIndirect (font); | |
739 | old_font = SelectObject (context, check_font); | |
740 | ||
e38ac6e2 JR |
741 | /* Everything else is contained within otf_spec so should get |
742 | marked along with it. */ | |
743 | GCPRO1 (otf_spec); | |
744 | ||
e14dc92d JR |
745 | /* Scan GSUB and GPOS tables. */ |
746 | for (i = 0; i < 2; i++) | |
747 | { | |
748 | int j, n_match_features; | |
749 | unsigned short scriptlist_table, feature_table, n_scripts; | |
750 | unsigned short script_table, langsys_table, n_langs; | |
751 | unsigned short feature_index, n_features; | |
752 | DWORD tbl = feature_tables[i]; | |
e14dc92d JR |
753 | |
754 | /* Skip if no features requested from this table. */ | |
755 | if (NILP (features[i])) | |
756 | continue; | |
757 | ||
6b8aa22a JR |
758 | /* If features is not a cons, this font spec is messed up. */ |
759 | if (!CONSP (features[i])) | |
760 | goto no_support; | |
761 | ||
e14dc92d JR |
762 | /* Read GPOS/GSUB header. */ |
763 | OTF_INT16_VAL (tbl, 4, &scriptlist_table); | |
764 | OTF_INT16_VAL (tbl, 6, &feature_table); | |
765 | OTF_INT16_VAL (tbl, scriptlist_table, &n_scripts); | |
766 | ||
767 | /* Find the appropriate script table. */ | |
768 | script_table = 0; | |
769 | for (j = 0; j < n_scripts; j++) | |
770 | { | |
771 | DWORD script_id; | |
772 | OTF_DWORDTAG_VAL (tbl, scriptlist_table + 2 + j * 6, &script_id); | |
773 | if (script_id == script_tag) | |
774 | { | |
775 | OTF_INT16_VAL (tbl, scriptlist_table + 6 + j * 6, &script_table); | |
776 | break; | |
777 | } | |
595f1870 | 778 | #if 0 /* Causes false positives. */ |
e14dc92d JR |
779 | /* If there is a DFLT script defined in the font, use it |
780 | if the specified script is not found. */ | |
781 | else if (script_id == default_script) | |
782 | OTF_INT16_VAL (tbl, scriptlist_table + 6 + j * 6, &script_table); | |
595f1870 | 783 | #endif |
e14dc92d JR |
784 | } |
785 | /* If no specific or default script table was found, then this font | |
786 | does not support the script. */ | |
787 | if (!script_table) | |
788 | goto no_support; | |
789 | ||
790 | /* Offset is from beginning of scriptlist_table. */ | |
791 | script_table += scriptlist_table; | |
792 | ||
793 | /* Get default langsys table. */ | |
794 | OTF_INT16_VAL (tbl, script_table, &langsys_table); | |
795 | ||
796 | /* If lang was specified, see if font contains a specific entry. */ | |
797 | if (!NILP (lang)) | |
798 | { | |
799 | OTF_INT16_VAL (tbl, script_table + 2, &n_langs); | |
800 | ||
801 | for (j = 0; j < n_langs; j++) | |
802 | { | |
803 | DWORD lang_id; | |
804 | OTF_DWORDTAG_VAL (tbl, script_table + 4 + j * 6, &lang_id); | |
805 | if (lang_id == lang_tag) | |
806 | { | |
807 | OTF_INT16_VAL (tbl, script_table + 8 + j * 6, &langsys_table); | |
808 | break; | |
809 | } | |
810 | } | |
811 | } | |
812 | ||
813 | if (!langsys_table) | |
814 | goto no_support; | |
815 | ||
816 | /* Offset is from beginning of script table. */ | |
817 | langsys_table += script_table; | |
818 | ||
819 | /* Check the features. Features may contain nil according to | |
820 | documentation in font_prop_validate_otf, so count them. */ | |
821 | n_match_features = 0; | |
d0bfec76 | 822 | for (rest = features[i]; CONSP (rest); rest = XCDR (rest)) |
e14dc92d | 823 | { |
d0bfec76 | 824 | Lisp_Object feature = XCAR (rest); |
e14dc92d JR |
825 | if (!NILP (feature)) |
826 | n_match_features++; | |
827 | } | |
828 | ||
829 | /* If there are no features to check, skip checking. */ | |
830 | if (!n_match_features) | |
831 | continue; | |
832 | ||
833 | /* First check required feature (if any). */ | |
834 | OTF_INT16_VAL (tbl, langsys_table + 2, &feature_index); | |
835 | if (feature_index != 0xFFFF) | |
836 | { | |
837 | char feature_id[5]; | |
838 | OTF_TAG_VAL (tbl, feature_table + 2 + feature_index * 6, feature_id); | |
839 | OTF_TAG_VAL (tbl, feature_table + 2 + feature_index * 6, feature_id); | |
840 | /* Assume no duplicates in the font table. This allows us to mark | |
841 | the features off by simply decrementing a counter. */ | |
842 | if (!NILP (Fmemq (intern (feature_id), features[i]))) | |
843 | n_match_features--; | |
844 | } | |
845 | /* Now check all the other features. */ | |
846 | OTF_INT16_VAL (tbl, langsys_table + 4, &n_features); | |
847 | for (j = 0; j < n_features; j++) | |
848 | { | |
849 | char feature_id[5]; | |
850 | OTF_INT16_VAL (tbl, langsys_table + 6 + j * 2, &feature_index); | |
851 | OTF_TAG_VAL (tbl, feature_table + 2 + feature_index * 6, feature_id); | |
852 | /* Assume no duplicates in the font table. This allows us to mark | |
853 | the features off by simply decrementing a counter. */ | |
854 | if (!NILP (Fmemq (intern (feature_id), features[i]))) | |
855 | n_match_features--; | |
856 | } | |
857 | ||
858 | if (n_match_features > 0) | |
859 | goto no_support; | |
860 | } | |
861 | ||
862 | retval = 1; | |
863 | ||
864 | no_support: | |
865 | font_table_error: | |
866 | /* restore graphics context. */ | |
867 | SelectObject (context, old_font); | |
868 | DeleteObject (check_font); | |
869 | release_frame_dc (f, context); | |
870 | ||
871 | return retval; | |
872 | } | |
873 | ||
874 | static Lisp_Object | |
875 | otf_features (HDC context, char *table) | |
876 | { | |
877 | Lisp_Object script_list = Qnil; | |
878 | unsigned short scriptlist_table, n_scripts, feature_table; | |
879 | DWORD tbl = OTF_TAG (table); | |
880 | int i, j, k; | |
881 | ||
882 | /* Look for scripts in the table. */ | |
883 | OTF_INT16_VAL (tbl, 4, &scriptlist_table); | |
884 | OTF_INT16_VAL (tbl, 6, &feature_table); | |
885 | OTF_INT16_VAL (tbl, scriptlist_table, &n_scripts); | |
886 | ||
887 | for (i = 0; i < n_scripts; i++) | |
888 | { | |
889 | char script[5], lang[5]; | |
890 | unsigned short script_table, lang_count, langsys_table, feature_count; | |
891 | Lisp_Object script_tag, langsys_list, langsys_tag, feature_list; | |
892 | unsigned short record_offset = scriptlist_table + 2 + i * 6; | |
893 | OTF_TAG_VAL (tbl, record_offset, script); | |
894 | OTF_INT16_VAL (tbl, record_offset + 4, &script_table); | |
895 | ||
896 | /* Offset is from beginning of script table. */ | |
897 | script_table += scriptlist_table; | |
898 | ||
899 | script_tag = intern (script); | |
900 | langsys_list = Qnil; | |
901 | ||
902 | /* Optional default lang. */ | |
903 | OTF_INT16_VAL (tbl, script_table, &langsys_table); | |
904 | if (langsys_table) | |
905 | { | |
906 | /* Offset is from beginning of script table. */ | |
907 | langsys_table += script_table; | |
908 | ||
909 | langsys_tag = Qnil; | |
910 | feature_list = Qnil; | |
911 | OTF_INT16_VAL (tbl, langsys_table + 4, &feature_count); | |
912 | for (k = 0; k < feature_count; k++) | |
913 | { | |
914 | char feature[5]; | |
915 | unsigned short index; | |
916 | OTF_INT16_VAL (tbl, langsys_table + 6 + k * 2, &index); | |
917 | OTF_TAG_VAL (tbl, feature_table + 2 + index * 6, feature); | |
918 | feature_list = Fcons (intern (feature), feature_list); | |
919 | } | |
920 | langsys_list = Fcons (Fcons (langsys_tag, feature_list), | |
921 | langsys_list); | |
922 | } | |
923 | ||
924 | /* List of supported languages. */ | |
925 | OTF_INT16_VAL (tbl, script_table + 2, &lang_count); | |
926 | ||
927 | for (j = 0; j < lang_count; j++) | |
928 | { | |
929 | record_offset = script_table + 4 + j * 6; | |
930 | OTF_TAG_VAL (tbl, record_offset, lang); | |
931 | OTF_INT16_VAL (tbl, record_offset + 4, &langsys_table); | |
932 | ||
933 | /* Offset is from beginning of script table. */ | |
934 | langsys_table += script_table; | |
935 | ||
936 | langsys_tag = intern (lang); | |
937 | feature_list = Qnil; | |
938 | OTF_INT16_VAL (tbl, langsys_table + 4, &feature_count); | |
939 | for (k = 0; k < feature_count; k++) | |
940 | { | |
941 | char feature[5]; | |
942 | unsigned short index; | |
943 | OTF_INT16_VAL (tbl, langsys_table + 6 + k * 2, &index); | |
944 | OTF_TAG_VAL (tbl, feature_table + 2 + index * 6, feature); | |
945 | feature_list = Fcons (intern (feature), feature_list); | |
946 | } | |
947 | langsys_list = Fcons (Fcons (langsys_tag, feature_list), | |
948 | langsys_list); | |
949 | ||
950 | } | |
951 | ||
952 | script_list = Fcons (Fcons (script_tag, langsys_list), script_list); | |
953 | } | |
954 | ||
955 | return script_list; | |
956 | ||
957 | font_table_error: | |
958 | return Qnil; | |
959 | } | |
960 | ||
961 | #undef OTF_INT16_VAL | |
962 | #undef OTF_TAG_VAL | |
963 | #undef OTF_TAG | |
964 | ||
965 | \f | |
966 | struct font_driver uniscribe_font_driver = | |
967 | { | |
968 | 0, /* Quniscribe */ | |
fd302b02 | 969 | 0, /* case insensitive */ |
e14dc92d JR |
970 | w32font_get_cache, |
971 | uniscribe_list, | |
972 | uniscribe_match, | |
973 | uniscribe_list_family, | |
974 | NULL, /* free_entity */ | |
975 | uniscribe_open, | |
976 | uniscribe_close, | |
977 | NULL, /* prepare_face */ | |
978 | NULL, /* done_face */ | |
979 | w32font_has_char, | |
980 | uniscribe_encode_char, | |
981 | w32font_text_extents, | |
982 | w32font_draw, | |
983 | NULL, /* get_bitmap */ | |
984 | NULL, /* free_bitmap */ | |
985 | NULL, /* get_outline */ | |
986 | NULL, /* free_outline */ | |
987 | NULL, /* anchor_point */ | |
b56ceb92 | 988 | uniscribe_otf_capability, /* Defined so (font-get FONTOBJ :otf) works. */ |
e14dc92d JR |
989 | NULL, /* otf_drive - use shape instead. */ |
990 | NULL, /* start_for_frame */ | |
991 | NULL, /* end_for_frame */ | |
9c88f339 JB |
992 | uniscribe_shape, |
993 | NULL, /* check */ | |
994 | NULL, /* get_variation_glyphs */ | |
995 | NULL, /* filter_properties */ | |
996 | NULL, /* cached_font_ok */ | |
e14dc92d JR |
997 | }; |
998 | ||
999 | /* Note that this should be called at every startup, not just when dumping, | |
1000 | as it needs to test for the existence of the Uniscribe library. */ | |
1001 | void | |
b56ceb92 | 1002 | syms_of_w32uniscribe (void) |
e14dc92d JR |
1003 | { |
1004 | HMODULE uniscribe; | |
1005 | ||
1006 | /* Don't init uniscribe when dumping */ | |
1007 | if (!initialized) | |
1008 | return; | |
1009 | ||
1010 | /* Don't register if uniscribe is not available. */ | |
1011 | uniscribe = GetModuleHandle ("usp10"); | |
1012 | if (!uniscribe) | |
1013 | return; | |
1014 | ||
1015 | uniscribe_font_driver.type = Quniscribe; | |
1016 | uniscribe_available = 1; | |
1017 | ||
1018 | register_font_driver (&uniscribe_font_driver, NULL); | |
1019 | } |