1 | /**************************************************************************** |
2 | ** |
3 | ** Copyright (C) 2019 The Qt Company Ltd. |
4 | ** Copyright (C) 2013 Konstantin Ritt |
5 | ** Contact: https://www.qt.io/licensing/ |
6 | ** |
7 | ** This file is part of the QtGui module of the Qt Toolkit. |
8 | ** |
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39 | ****************************************************************************/ |
40 | |
41 | #include "qharfbuzzng_p.h" |
42 | |
43 | #include <qstring.h> |
44 | #include <qvector.h> |
45 | |
46 | #include <private/qstringiterator_p.h> |
47 | |
48 | #include "qfontengine_p.h" |
49 | |
50 | QT_BEGIN_NAMESPACE |
51 | |
52 | // Unicode routines |
53 | |
54 | static const hb_script_t _qtscript_to_hbscript[] = { |
55 | HB_SCRIPT_UNKNOWN, |
56 | HB_SCRIPT_INHERITED, |
57 | HB_SCRIPT_COMMON, |
58 | |
59 | HB_SCRIPT_LATIN, |
60 | HB_SCRIPT_GREEK, |
61 | HB_SCRIPT_CYRILLIC, |
62 | HB_SCRIPT_ARMENIAN, |
63 | HB_SCRIPT_HEBREW, |
64 | HB_SCRIPT_ARABIC, |
65 | HB_SCRIPT_SYRIAC, |
66 | HB_SCRIPT_THAANA, |
67 | HB_SCRIPT_DEVANAGARI, |
68 | HB_SCRIPT_BENGALI, |
69 | HB_SCRIPT_GURMUKHI, |
70 | HB_SCRIPT_GUJARATI, |
71 | HB_SCRIPT_ORIYA, |
72 | HB_SCRIPT_TAMIL, |
73 | HB_SCRIPT_TELUGU, |
74 | HB_SCRIPT_KANNADA, |
75 | HB_SCRIPT_MALAYALAM, |
76 | HB_SCRIPT_SINHALA, |
77 | HB_SCRIPT_THAI, |
78 | HB_SCRIPT_LAO, |
79 | HB_SCRIPT_TIBETAN, |
80 | HB_SCRIPT_MYANMAR, |
81 | HB_SCRIPT_GEORGIAN, |
82 | HB_SCRIPT_HANGUL, |
83 | HB_SCRIPT_ETHIOPIC, |
84 | HB_SCRIPT_CHEROKEE, |
85 | HB_SCRIPT_CANADIAN_ABORIGINAL, |
86 | HB_SCRIPT_OGHAM, |
87 | HB_SCRIPT_RUNIC, |
88 | HB_SCRIPT_KHMER, |
89 | HB_SCRIPT_MONGOLIAN, |
90 | HB_SCRIPT_HIRAGANA, |
91 | HB_SCRIPT_KATAKANA, |
92 | HB_SCRIPT_BOPOMOFO, |
93 | HB_SCRIPT_HAN, |
94 | HB_SCRIPT_YI, |
95 | HB_SCRIPT_OLD_ITALIC, |
96 | HB_SCRIPT_GOTHIC, |
97 | HB_SCRIPT_DESERET, |
98 | HB_SCRIPT_TAGALOG, |
99 | HB_SCRIPT_HANUNOO, |
100 | HB_SCRIPT_BUHID, |
101 | HB_SCRIPT_TAGBANWA, |
102 | HB_SCRIPT_COPTIC, |
103 | |
104 | // Unicode 4.0 additions |
105 | HB_SCRIPT_LIMBU, |
106 | HB_SCRIPT_TAI_LE, |
107 | HB_SCRIPT_LINEAR_B, |
108 | HB_SCRIPT_UGARITIC, |
109 | HB_SCRIPT_SHAVIAN, |
110 | HB_SCRIPT_OSMANYA, |
111 | HB_SCRIPT_CYPRIOT, |
112 | HB_SCRIPT_BRAILLE, |
113 | |
114 | // Unicode 4.1 additions |
115 | HB_SCRIPT_BUGINESE, |
116 | HB_SCRIPT_NEW_TAI_LUE, |
117 | HB_SCRIPT_GLAGOLITIC, |
118 | HB_SCRIPT_TIFINAGH, |
119 | HB_SCRIPT_SYLOTI_NAGRI, |
120 | HB_SCRIPT_OLD_PERSIAN, |
121 | HB_SCRIPT_KHAROSHTHI, |
122 | |
123 | // Unicode 5.0 additions |
124 | HB_SCRIPT_BALINESE, |
125 | HB_SCRIPT_CUNEIFORM, |
126 | HB_SCRIPT_PHOENICIAN, |
127 | HB_SCRIPT_PHAGS_PA, |
128 | HB_SCRIPT_NKO, |
129 | |
130 | // Unicode 5.1 additions |
131 | HB_SCRIPT_SUNDANESE, |
132 | HB_SCRIPT_LEPCHA, |
133 | HB_SCRIPT_OL_CHIKI, |
134 | HB_SCRIPT_VAI, |
135 | HB_SCRIPT_SAURASHTRA, |
136 | HB_SCRIPT_KAYAH_LI, |
137 | HB_SCRIPT_REJANG, |
138 | HB_SCRIPT_LYCIAN, |
139 | HB_SCRIPT_CARIAN, |
140 | HB_SCRIPT_LYDIAN, |
141 | HB_SCRIPT_CHAM, |
142 | |
143 | // Unicode 5.2 additions |
144 | HB_SCRIPT_TAI_THAM, |
145 | HB_SCRIPT_TAI_VIET, |
146 | HB_SCRIPT_AVESTAN, |
147 | HB_SCRIPT_EGYPTIAN_HIEROGLYPHS, |
148 | HB_SCRIPT_SAMARITAN, |
149 | HB_SCRIPT_LISU, |
150 | HB_SCRIPT_BAMUM, |
151 | HB_SCRIPT_JAVANESE, |
152 | HB_SCRIPT_MEETEI_MAYEK, |
153 | HB_SCRIPT_IMPERIAL_ARAMAIC, |
154 | HB_SCRIPT_OLD_SOUTH_ARABIAN, |
155 | HB_SCRIPT_INSCRIPTIONAL_PARTHIAN, |
156 | HB_SCRIPT_INSCRIPTIONAL_PAHLAVI, |
157 | HB_SCRIPT_OLD_TURKIC, |
158 | HB_SCRIPT_KAITHI, |
159 | |
160 | // Unicode 6.0 additions |
161 | HB_SCRIPT_BATAK, |
162 | HB_SCRIPT_BRAHMI, |
163 | HB_SCRIPT_MANDAIC, |
164 | |
165 | // Unicode 6.1 additions |
166 | HB_SCRIPT_CHAKMA, |
167 | HB_SCRIPT_MEROITIC_CURSIVE, |
168 | HB_SCRIPT_MEROITIC_HIEROGLYPHS, |
169 | HB_SCRIPT_MIAO, |
170 | HB_SCRIPT_SHARADA, |
171 | HB_SCRIPT_SORA_SOMPENG, |
172 | HB_SCRIPT_TAKRI, |
173 | |
174 | // Unicode 7.0 additions |
175 | HB_SCRIPT_CAUCASIAN_ALBANIAN, |
176 | HB_SCRIPT_BASSA_VAH, |
177 | HB_SCRIPT_DUPLOYAN, |
178 | HB_SCRIPT_ELBASAN, |
179 | HB_SCRIPT_GRANTHA, |
180 | HB_SCRIPT_PAHAWH_HMONG, |
181 | HB_SCRIPT_KHOJKI, |
182 | HB_SCRIPT_LINEAR_A, |
183 | HB_SCRIPT_MAHAJANI, |
184 | HB_SCRIPT_MANICHAEAN, |
185 | HB_SCRIPT_MENDE_KIKAKUI, |
186 | HB_SCRIPT_MODI, |
187 | HB_SCRIPT_MRO, |
188 | HB_SCRIPT_OLD_NORTH_ARABIAN, |
189 | HB_SCRIPT_NABATAEAN, |
190 | HB_SCRIPT_PALMYRENE, |
191 | HB_SCRIPT_PAU_CIN_HAU, |
192 | HB_SCRIPT_OLD_PERMIC, |
193 | HB_SCRIPT_PSALTER_PAHLAVI, |
194 | HB_SCRIPT_SIDDHAM, |
195 | HB_SCRIPT_KHUDAWADI, |
196 | HB_SCRIPT_TIRHUTA, |
197 | HB_SCRIPT_WARANG_CITI, |
198 | |
199 | // Unicode 8.0 additions |
200 | HB_SCRIPT_AHOM, |
201 | HB_SCRIPT_ANATOLIAN_HIEROGLYPHS, |
202 | HB_SCRIPT_HATRAN, |
203 | HB_SCRIPT_MULTANI, |
204 | HB_SCRIPT_OLD_HUNGARIAN, |
205 | HB_SCRIPT_SIGNWRITING, |
206 | |
207 | // Unicode 9.0 additions |
208 | HB_SCRIPT_ADLAM, |
209 | HB_SCRIPT_BHAIKSUKI, |
210 | HB_SCRIPT_MARCHEN, |
211 | HB_SCRIPT_NEWA, |
212 | HB_SCRIPT_OSAGE, |
213 | HB_SCRIPT_TANGUT, |
214 | |
215 | // Unicode 10.0 additions |
216 | HB_SCRIPT_MASARAM_GONDI, |
217 | HB_SCRIPT_NUSHU, |
218 | HB_SCRIPT_SOYOMBO, |
219 | HB_SCRIPT_ZANABAZAR_SQUARE, |
220 | |
221 | // Unicode 12.1 additions (not present in harfbuzz-ng 1.7.4) |
222 | hb_script_t(HB_TAG('D', 'o', 'g', 'r')), // Script_Dogra |
223 | hb_script_t(HB_TAG('G', 'o', 'n', 'g')), // Script_GunjalaGondi |
224 | hb_script_t(HB_TAG('R', 'o', 'h', 'g')), // Script_HanifiRohingya |
225 | hb_script_t(HB_TAG('M', 'a', 'k', 'a')), // Script_Makasar |
226 | hb_script_t(HB_TAG('M', 'e', 'd', 'f')), // Script_Medefaidrin |
227 | hb_script_t(HB_TAG('S', 'o', 'g', 'o')), // Script_OldSogdian |
228 | hb_script_t(HB_TAG('S', 'o', 'g', 'd')), // Script_Sogdian |
229 | hb_script_t(HB_TAG('E', 'l', 'y', 'm')), // Script_Elymaic |
230 | hb_script_t(HB_TAG('N', 'a', 'n', 'd')), // Script_Nandinagari |
231 | hb_script_t(HB_TAG('H', 'm', 'n', 'p')), // Script_NyiakengPuachueHmong |
232 | hb_script_t(HB_TAG('W', 'c', 'h', 'o')), // Script_Wancho |
233 | |
234 | // Unicode 13.0 additions (as above) |
235 | hb_script_t(HB_TAG('C', 'h', 'o', 'r')), // Script_Chorasmian |
236 | hb_script_t(HB_TAG('D', 'i', 'v', 'e')), // Script_DivesAkuru |
237 | hb_script_t(HB_TAG('K', 'h', 'i', 't')), // Script_KhitanSmallScript |
238 | hb_script_t(HB_TAG('Y', 'e', 'z', 'i')), // Script_Yezidi |
239 | }; |
240 | Q_STATIC_ASSERT(QChar::ScriptCount == sizeof(_qtscript_to_hbscript) / sizeof(_qtscript_to_hbscript[0])); |
241 | |
242 | hb_script_t hb_qt_script_to_script(QChar::Script script) |
243 | { |
244 | return _qtscript_to_hbscript[script]; |
245 | } |
246 | |
247 | QChar::Script hb_qt_script_from_script(hb_script_t script) |
248 | { |
249 | uint i = QChar::ScriptCount - 1; |
250 | while (i > QChar::Script_Unknown && _qtscript_to_hbscript[i] != script) |
251 | --i; |
252 | return QChar::Script(i); |
253 | } |
254 | |
255 | |
256 | static hb_unicode_combining_class_t |
257 | _hb_qt_unicode_combining_class(hb_unicode_funcs_t * /*ufuncs*/, |
258 | hb_codepoint_t unicode, |
259 | void * /*user_data*/) |
260 | { |
261 | return hb_unicode_combining_class_t(QChar::combiningClass(ucs4: unicode)); |
262 | } |
263 | |
264 | static unsigned int |
265 | _hb_qt_unicode_eastasian_width(hb_unicode_funcs_t * /*ufuncs*/, |
266 | hb_codepoint_t /*unicode*/, |
267 | void * /*user_data*/) |
268 | { |
269 | qCritical(msg: "hb_qt_unicode_eastasian_width: not implemented!" ); |
270 | return 1; |
271 | } |
272 | |
273 | static const hb_unicode_general_category_t _qtcategory_to_hbcategory[] = { |
274 | HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK, // Mn |
275 | HB_UNICODE_GENERAL_CATEGORY_SPACING_MARK, // Mc |
276 | HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK, // Me |
277 | |
278 | HB_UNICODE_GENERAL_CATEGORY_DECIMAL_NUMBER, // Nd |
279 | HB_UNICODE_GENERAL_CATEGORY_LETTER_NUMBER, // Nl |
280 | HB_UNICODE_GENERAL_CATEGORY_OTHER_NUMBER, // No |
281 | |
282 | HB_UNICODE_GENERAL_CATEGORY_SPACE_SEPARATOR, // Zs |
283 | HB_UNICODE_GENERAL_CATEGORY_LINE_SEPARATOR, // Zl |
284 | HB_UNICODE_GENERAL_CATEGORY_PARAGRAPH_SEPARATOR, // Zp |
285 | |
286 | HB_UNICODE_GENERAL_CATEGORY_CONTROL, // Cc |
287 | HB_UNICODE_GENERAL_CATEGORY_FORMAT, // Cf |
288 | HB_UNICODE_GENERAL_CATEGORY_SURROGATE, // Cs |
289 | HB_UNICODE_GENERAL_CATEGORY_PRIVATE_USE, // Co |
290 | HB_UNICODE_GENERAL_CATEGORY_UNASSIGNED, // Cn |
291 | |
292 | HB_UNICODE_GENERAL_CATEGORY_UPPERCASE_LETTER, // Lu |
293 | HB_UNICODE_GENERAL_CATEGORY_LOWERCASE_LETTER, // Ll |
294 | HB_UNICODE_GENERAL_CATEGORY_TITLECASE_LETTER, // Lt |
295 | HB_UNICODE_GENERAL_CATEGORY_MODIFIER_LETTER, // Lm |
296 | HB_UNICODE_GENERAL_CATEGORY_OTHER_LETTER, // Lo |
297 | |
298 | HB_UNICODE_GENERAL_CATEGORY_CONNECT_PUNCTUATION, // Pc |
299 | HB_UNICODE_GENERAL_CATEGORY_DASH_PUNCTUATION, // Pd |
300 | HB_UNICODE_GENERAL_CATEGORY_OPEN_PUNCTUATION, // Ps |
301 | HB_UNICODE_GENERAL_CATEGORY_CLOSE_PUNCTUATION, // Pe |
302 | HB_UNICODE_GENERAL_CATEGORY_INITIAL_PUNCTUATION, // Pi |
303 | HB_UNICODE_GENERAL_CATEGORY_FINAL_PUNCTUATION, // Pf |
304 | HB_UNICODE_GENERAL_CATEGORY_OTHER_PUNCTUATION, // Po |
305 | |
306 | HB_UNICODE_GENERAL_CATEGORY_MATH_SYMBOL, // Sm |
307 | HB_UNICODE_GENERAL_CATEGORY_CURRENCY_SYMBOL, // Sc |
308 | HB_UNICODE_GENERAL_CATEGORY_MODIFIER_SYMBOL, // Sk |
309 | HB_UNICODE_GENERAL_CATEGORY_OTHER_SYMBOL // So |
310 | }; |
311 | |
312 | static hb_unicode_general_category_t |
313 | _hb_qt_unicode_general_category(hb_unicode_funcs_t * /*ufuncs*/, |
314 | hb_codepoint_t unicode, |
315 | void * /*user_data*/) |
316 | { |
317 | return _qtcategory_to_hbcategory[QChar::category(ucs4: unicode)]; |
318 | } |
319 | |
320 | static hb_codepoint_t |
321 | _hb_qt_unicode_mirroring(hb_unicode_funcs_t * /*ufuncs*/, |
322 | hb_codepoint_t unicode, |
323 | void * /*user_data*/) |
324 | { |
325 | return QChar::mirroredChar(ucs4: unicode); |
326 | } |
327 | |
328 | static hb_script_t |
329 | _hb_qt_unicode_script(hb_unicode_funcs_t * /*ufuncs*/, |
330 | hb_codepoint_t unicode, |
331 | void * /*user_data*/) |
332 | { |
333 | return _qtscript_to_hbscript[QChar::script(ucs4: unicode)]; |
334 | } |
335 | |
336 | static hb_bool_t |
337 | _hb_qt_unicode_compose(hb_unicode_funcs_t * /*ufuncs*/, |
338 | hb_codepoint_t a, hb_codepoint_t b, |
339 | hb_codepoint_t *ab, |
340 | void * /*user_data*/) |
341 | { |
342 | // ### optimize |
343 | QString s = QString::fromUcs4(&a, size: 1) + QString::fromUcs4(&b, size: 1); |
344 | QString normalized = s.normalized(mode: QString::NormalizationForm_C); |
345 | |
346 | QStringIterator it(normalized); |
347 | Q_ASSERT(it.hasNext()); // size>0 |
348 | *ab = it.next(); |
349 | |
350 | return !it.hasNext(); // size==1 |
351 | } |
352 | |
353 | static hb_bool_t |
354 | _hb_qt_unicode_decompose(hb_unicode_funcs_t * /*ufuncs*/, |
355 | hb_codepoint_t ab, |
356 | hb_codepoint_t *a, hb_codepoint_t *b, |
357 | void * /*user_data*/) |
358 | { |
359 | // ### optimize |
360 | if (QChar::decompositionTag(ucs4: ab) != QChar::Canonical) // !NFD |
361 | return false; |
362 | |
363 | QString normalized = QChar::decomposition(ucs4: ab); |
364 | if (normalized.isEmpty()) |
365 | return false; |
366 | |
367 | QStringIterator it(normalized); |
368 | Q_ASSERT(it.hasNext()); // size>0 |
369 | *a = it.next(); |
370 | |
371 | if (!it.hasNext()) { // size==1 |
372 | *b = 0; |
373 | return *a != ab; |
374 | } |
375 | |
376 | // size>1 |
377 | *b = it.next(); |
378 | if (!it.hasNext()) { // size==2 |
379 | // Here's the ugly part: if ab decomposes to a single character and |
380 | // that character decomposes again, we have to detect that and undo |
381 | // the second part :-( |
382 | const QString recomposed = normalized.normalized(mode: QString::NormalizationForm_C); |
383 | QStringIterator jt(recomposed); |
384 | Q_ASSERT(jt.hasNext()); // size>0 |
385 | const hb_codepoint_t c = jt.next(); |
386 | if (c != *a && c != ab) { |
387 | *a = c; |
388 | *b = 0; |
389 | } |
390 | return true; |
391 | } |
392 | |
393 | // size>2 |
394 | // If decomposed to more than two characters, take the last one, |
395 | // and recompose the rest to get the first component |
396 | do { |
397 | *b = it.next(); |
398 | } while (it.hasNext()); |
399 | normalized.chop(n: QChar::requiresSurrogates(ucs4: *b) ? 2 : 1); |
400 | const QString recomposed = normalized.normalized(mode: QString::NormalizationForm_C); |
401 | QStringIterator jt(recomposed); |
402 | Q_ASSERT(jt.hasNext()); // size>0 |
403 | // We expect that recomposed has exactly one character now |
404 | *a = jt.next(); |
405 | return true; |
406 | } |
407 | |
408 | static unsigned int |
409 | _hb_qt_unicode_decompose_compatibility(hb_unicode_funcs_t * /*ufuncs*/, |
410 | hb_codepoint_t u, |
411 | hb_codepoint_t *decomposed, |
412 | void * /*user_data*/) |
413 | { |
414 | const QString normalized = QChar::decomposition(ucs4: u); |
415 | |
416 | uint outlen = 0; |
417 | QStringIterator it(normalized); |
418 | while (it.hasNext()) { |
419 | Q_ASSERT(outlen < HB_UNICODE_MAX_DECOMPOSITION_LEN); |
420 | decomposed[outlen++] = it.next(); |
421 | } |
422 | |
423 | return outlen; |
424 | } |
425 | |
426 | |
427 | struct _hb_unicode_funcs_t { |
428 | _hb_unicode_funcs_t() |
429 | { |
430 | funcs = hb_unicode_funcs_create(NULL); |
431 | hb_unicode_funcs_set_combining_class_func(ufuncs: funcs, func: _hb_qt_unicode_combining_class, NULL, NULL); |
432 | hb_unicode_funcs_set_eastasian_width_func(ufuncs: funcs, func: _hb_qt_unicode_eastasian_width, NULL, NULL); |
433 | hb_unicode_funcs_set_general_category_func(ufuncs: funcs, func: _hb_qt_unicode_general_category, NULL, NULL); |
434 | hb_unicode_funcs_set_mirroring_func(ufuncs: funcs, func: _hb_qt_unicode_mirroring, NULL, NULL); |
435 | hb_unicode_funcs_set_script_func(ufuncs: funcs, func: _hb_qt_unicode_script, NULL, NULL); |
436 | hb_unicode_funcs_set_compose_func(ufuncs: funcs, func: _hb_qt_unicode_compose, NULL, NULL); |
437 | hb_unicode_funcs_set_decompose_func(ufuncs: funcs, func: _hb_qt_unicode_decompose, NULL, NULL); |
438 | hb_unicode_funcs_set_decompose_compatibility_func(ufuncs: funcs, func: _hb_qt_unicode_decompose_compatibility, NULL, NULL); |
439 | } |
440 | ~_hb_unicode_funcs_t() |
441 | { |
442 | hb_unicode_funcs_destroy(ufuncs: funcs); |
443 | } |
444 | |
445 | hb_unicode_funcs_t *funcs; |
446 | }; |
447 | |
448 | Q_GLOBAL_STATIC(_hb_unicode_funcs_t, qt_ufuncs) |
449 | |
450 | hb_unicode_funcs_t *hb_qt_get_unicode_funcs() |
451 | { |
452 | return qt_ufuncs()->funcs; |
453 | } |
454 | |
455 | |
456 | // Font routines |
457 | |
458 | static hb_bool_t |
459 | _hb_qt_get_font_h_extents(hb_font_t * /*font*/, void *font_data, |
460 | hb_font_extents_t *metrics, |
461 | void * /*user_data*/) |
462 | { |
463 | QFontEngine *fe = static_cast<QFontEngine *>(font_data); |
464 | Q_ASSERT(fe); |
465 | |
466 | metrics->ascender = fe->ascent().value(); |
467 | metrics->descender = fe->descent().value(); |
468 | metrics->line_gap = fe->leading().value(); |
469 | |
470 | return true; |
471 | } |
472 | |
473 | static hb_bool_t |
474 | _hb_qt_font_get_nominal_glyph(hb_font_t * /*font*/, void *font_data, |
475 | hb_codepoint_t unicode, |
476 | hb_codepoint_t *glyph, |
477 | void * /*user_data*/) |
478 | { |
479 | QFontEngine *fe = static_cast<QFontEngine *>(font_data); |
480 | Q_ASSERT(fe); |
481 | |
482 | *glyph = fe->glyphIndex(ucs4: unicode); |
483 | |
484 | return *glyph != 0; |
485 | } |
486 | |
487 | static hb_bool_t |
488 | _hb_qt_font_get_variation_glyph(hb_font_t * /*font*/, void *font_data, |
489 | hb_codepoint_t unicode, hb_codepoint_t /*variation_selector*/, |
490 | hb_codepoint_t *glyph, |
491 | void * /*user_data*/) |
492 | { |
493 | QFontEngine *fe = static_cast<QFontEngine *>(font_data); |
494 | Q_ASSERT(fe); |
495 | |
496 | // ### TODO add support for variation selectors |
497 | *glyph = fe->glyphIndex(ucs4: unicode); |
498 | |
499 | return *glyph != 0; |
500 | } |
501 | |
502 | static hb_position_t |
503 | _hb_qt_font_get_glyph_h_advance(hb_font_t *font, void *font_data, |
504 | hb_codepoint_t glyph, |
505 | void * /*user_data*/) |
506 | { |
507 | QFontEngine *fe = static_cast<QFontEngine *>(font_data); |
508 | Q_ASSERT(fe); |
509 | |
510 | QFixed advance; |
511 | |
512 | QGlyphLayout g; |
513 | g.numGlyphs = 1; |
514 | g.glyphs = &glyph; |
515 | g.advances = &advance; |
516 | |
517 | fe->recalcAdvances(&g, QFontEngine::ShaperFlags(hb_qt_font_get_use_design_metrics(font))); |
518 | |
519 | return advance.value(); |
520 | } |
521 | |
522 | static hb_position_t |
523 | _hb_qt_font_get_glyph_h_kerning(hb_font_t *font, void *font_data, |
524 | hb_codepoint_t first_glyph, hb_codepoint_t second_glyph, |
525 | void * /*user_data*/) |
526 | { |
527 | QFontEngine *fe = static_cast<QFontEngine *>(font_data); |
528 | Q_ASSERT(fe); |
529 | |
530 | glyph_t glyphs[2] = { first_glyph, second_glyph }; |
531 | QFixed advance; |
532 | |
533 | QGlyphLayout g; |
534 | g.numGlyphs = 2; |
535 | g.glyphs = glyphs; |
536 | g.advances = &advance; |
537 | |
538 | fe->doKerning(&g, QFontEngine::ShaperFlags(hb_qt_font_get_use_design_metrics(font))); |
539 | |
540 | return advance.value(); |
541 | } |
542 | |
543 | static hb_bool_t |
544 | _hb_qt_font_get_glyph_extents(hb_font_t * /*font*/, void *font_data, |
545 | hb_codepoint_t glyph, |
546 | hb_glyph_extents_t *extents, |
547 | void * /*user_data*/) |
548 | { |
549 | QFontEngine *fe = static_cast<QFontEngine *>(font_data); |
550 | Q_ASSERT(fe); |
551 | |
552 | glyph_metrics_t gm = fe->boundingBox(glyph); |
553 | |
554 | extents->x_bearing = gm.x.value(); |
555 | extents->y_bearing = gm.y.value(); |
556 | extents->width = gm.width.value(); |
557 | extents->height = gm.height.value(); |
558 | |
559 | return true; |
560 | } |
561 | |
562 | static hb_bool_t |
563 | _hb_qt_font_get_glyph_contour_point(hb_font_t * /*font*/, void *font_data, |
564 | hb_codepoint_t glyph, |
565 | unsigned int point_index, hb_position_t *x, hb_position_t *y, |
566 | void * /*user_data*/) |
567 | { |
568 | QFontEngine *fe = static_cast<QFontEngine *>(font_data); |
569 | Q_ASSERT(fe); |
570 | |
571 | QFixed xpos, ypos; |
572 | quint32 numPoints = 1; |
573 | if (Q_LIKELY(fe->getPointInOutline(glyph, 0, point_index, &xpos, &ypos, &numPoints) == 0)) { |
574 | *x = xpos.value(); |
575 | *y = ypos.value(); |
576 | return true; |
577 | } |
578 | |
579 | *x = *y = 0; |
580 | return false; |
581 | } |
582 | |
583 | |
584 | static hb_user_data_key_t _useDesignMetricsKey; |
585 | |
586 | void hb_qt_font_set_use_design_metrics(hb_font_t *font, uint value) |
587 | { |
588 | hb_font_set_user_data(font, key: &_useDesignMetricsKey, data: (void *)quintptr(value), NULL, replace: true); |
589 | } |
590 | |
591 | uint hb_qt_font_get_use_design_metrics(hb_font_t *font) |
592 | { |
593 | return quintptr(hb_font_get_user_data(font, key: &_useDesignMetricsKey)); |
594 | } |
595 | |
596 | |
597 | struct _hb_qt_font_funcs_t { |
598 | _hb_qt_font_funcs_t() |
599 | { |
600 | funcs = hb_font_funcs_create(); |
601 | |
602 | hb_font_funcs_set_font_h_extents_func(ffuncs: funcs, func: _hb_qt_get_font_h_extents, NULL, NULL); |
603 | hb_font_funcs_set_nominal_glyph_func(ffuncs: funcs, func: _hb_qt_font_get_nominal_glyph, NULL, NULL); |
604 | hb_font_funcs_set_variation_glyph_func(ffuncs: funcs, func: _hb_qt_font_get_variation_glyph, NULL, NULL); |
605 | hb_font_funcs_set_glyph_h_advance_func(ffuncs: funcs, func: _hb_qt_font_get_glyph_h_advance, NULL, NULL); |
606 | hb_font_funcs_set_glyph_h_kerning_func(ffuncs: funcs, func: _hb_qt_font_get_glyph_h_kerning, NULL, NULL); |
607 | hb_font_funcs_set_glyph_extents_func(ffuncs: funcs, func: _hb_qt_font_get_glyph_extents, NULL, NULL); |
608 | hb_font_funcs_set_glyph_contour_point_func(ffuncs: funcs, func: _hb_qt_font_get_glyph_contour_point, NULL, NULL); |
609 | |
610 | hb_font_funcs_make_immutable(ffuncs: funcs); |
611 | } |
612 | ~_hb_qt_font_funcs_t() |
613 | { |
614 | hb_font_funcs_destroy(ffuncs: funcs); |
615 | } |
616 | |
617 | hb_font_funcs_t *funcs; |
618 | }; |
619 | |
620 | Q_GLOBAL_STATIC(_hb_qt_font_funcs_t, qt_ffuncs) |
621 | |
622 | hb_font_funcs_t *hb_qt_get_font_funcs() |
623 | { |
624 | return qt_ffuncs()->funcs; |
625 | } |
626 | |
627 | |
628 | static hb_blob_t * |
629 | _hb_qt_reference_table(hb_face_t * /*face*/, hb_tag_t tag, void *user_data) |
630 | { |
631 | QFontEngine::FaceData *data = static_cast<QFontEngine::FaceData *>(user_data); |
632 | Q_ASSERT(data); |
633 | |
634 | qt_get_font_table_func_t get_font_table = data->get_font_table; |
635 | Q_ASSERT(get_font_table); |
636 | |
637 | uint length = 0; |
638 | if (Q_UNLIKELY(!get_font_table(data->user_data, tag, 0, &length))) |
639 | return hb_blob_get_empty(); |
640 | |
641 | char *buffer = static_cast<char *>(malloc(size: length)); |
642 | Q_CHECK_PTR(buffer); |
643 | |
644 | if (Q_UNLIKELY(!get_font_table(data->user_data, tag, reinterpret_cast<uchar *>(buffer), &length))) |
645 | length = 0; |
646 | |
647 | return hb_blob_create(data: const_cast<const char *>(buffer), length, |
648 | mode: HB_MEMORY_MODE_READONLY, |
649 | user_data: buffer, destroy: free); |
650 | } |
651 | |
652 | static inline hb_face_t * |
653 | _hb_qt_face_create(QFontEngine *fe) |
654 | { |
655 | QFontEngine::FaceData *data = static_cast<QFontEngine::FaceData *>(malloc(size: sizeof(QFontEngine::FaceData))); |
656 | Q_CHECK_PTR(data); |
657 | data->user_data = fe->faceData.user_data; |
658 | data->get_font_table = fe->faceData.get_font_table; |
659 | |
660 | hb_face_t *face = hb_face_create_for_tables(reference_table_func: _hb_qt_reference_table, user_data: (void *)data, destroy: free); |
661 | if (Q_UNLIKELY(hb_face_is_immutable(face))) { |
662 | hb_face_destroy(face); |
663 | return NULL; |
664 | } |
665 | |
666 | hb_face_set_index(face, index: fe->faceId().index); |
667 | hb_face_set_upem(face, upem: fe->emSquareSize().truncate()); |
668 | |
669 | return face; |
670 | } |
671 | |
672 | static void |
673 | _hb_qt_face_release(void *user_data) |
674 | { |
675 | if (Q_LIKELY(user_data)) |
676 | hb_face_destroy(face: static_cast<hb_face_t *>(user_data)); |
677 | } |
678 | |
679 | hb_face_t *hb_qt_face_get_for_engine(QFontEngine *fe) |
680 | { |
681 | Q_ASSERT(fe && fe->type() != QFontEngine::Multi); |
682 | |
683 | if (Q_UNLIKELY(!fe->face_)) |
684 | fe->face_ = QFontEngine::Holder(_hb_qt_face_create(fe), _hb_qt_face_release); |
685 | |
686 | return static_cast<hb_face_t *>(fe->face_.get()); |
687 | } |
688 | |
689 | |
690 | static inline hb_font_t * |
691 | _hb_qt_font_create(QFontEngine *fe) |
692 | { |
693 | hb_face_t *face = hb_qt_face_get_for_engine(fe); |
694 | if (Q_UNLIKELY(!face)) |
695 | return NULL; |
696 | |
697 | hb_font_t *font = hb_font_create(face); |
698 | |
699 | if (Q_UNLIKELY(hb_font_is_immutable(font))) { |
700 | hb_font_destroy(font); |
701 | return NULL; |
702 | } |
703 | |
704 | const qreal y_ppem = fe->fontDef.pixelSize; |
705 | const qreal x_ppem = (fe->fontDef.pixelSize * fe->fontDef.stretch) / 100.0; |
706 | |
707 | hb_font_set_funcs(font, klass: hb_qt_get_font_funcs(), font_data: (void *)fe, NULL); |
708 | hb_font_set_scale(font, x_scale: QFixed::fromReal(r: x_ppem).value(), y_scale: -QFixed::fromReal(r: y_ppem).value()); |
709 | hb_font_set_ppem(font, x_ppem: int(x_ppem), y_ppem: int(y_ppem)); |
710 | |
711 | hb_font_set_ptem(font, ptem: fe->fontDef.pointSize); |
712 | |
713 | return font; |
714 | } |
715 | |
716 | static void |
717 | _hb_qt_font_release(void *user_data) |
718 | { |
719 | if (Q_LIKELY(user_data)) |
720 | hb_font_destroy(font: static_cast<hb_font_t *>(user_data)); |
721 | } |
722 | |
723 | hb_font_t *hb_qt_font_get_for_engine(QFontEngine *fe) |
724 | { |
725 | Q_ASSERT(fe && fe->type() != QFontEngine::Multi); |
726 | |
727 | if (Q_UNLIKELY(!fe->font_)) |
728 | fe->font_ = QFontEngine::Holder(_hb_qt_font_create(fe), _hb_qt_font_release); |
729 | |
730 | return static_cast<hb_font_t *>(fe->font_.get()); |
731 | } |
732 | |
733 | QT_END_NAMESPACE |
734 | |