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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
1 /*
2 * Copyright © 2009 Red Hat, Inc.
3 * Copyright © 2009 Keith Stribley
4 * Copyright © 2015 Google, Inc.
5 *
6 * This is part of HarfBuzz, a text shaping library.
7 *
8 * Permission is hereby granted, without written agreement and without
9 * license or royalty fees, to use, copy, modify, and distribute this
10 * software and its documentation for any purpose, provided that the
11 * above copyright notice and the following two paragraphs appear in
12 * all copies of this software.
13 *
14 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
15 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
16 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
17 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
18 * DAMAGE.
19 *
20 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
21 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
22 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
23 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
24 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
25 *
26 * Red Hat Author(s): Behdad Esfahbod
27 * Google Author(s): Behdad Esfahbod
28 */
29
30 #include "hb.hh"
31
32 #ifdef HAVE_FREETYPE
33
34 #include "hb-ft.h"
35
36 #include "hb-draw.hh"
37 #include "hb-font.hh"
38 #include "hb-machinery.hh"
39 #include "hb-cache.hh"
40 #include "hb-ot-os2-table.hh"
41 #include "hb-ot-shaper-arabic-pua.hh"
42
43 #include FT_ADVANCES_H
44 #include FT_MULTIPLE_MASTERS_H
45 #include FT_OUTLINE_H
46 #include FT_TRUETYPE_TABLES_H
47
48
49 /**
50 * SECTION:hb-ft
51 * @title: hb-ft
52 * @short_description: FreeType integration
53 * @include: hb-ft.h
54 *
55 * Functions for using HarfBuzz with the FreeType library.
56 *
57 * HarfBuzz supports using FreeType to provide face and
58 * font data.
59 *
60 * <note>Note that FreeType is not thread-safe, therefore these
61 * functions are not thread-safe either.</note>
62 **/
63
64
65 /* TODO:
66 *
67 * In general, this file does a fine job of what it's supposed to do.
68 * There are, however, things that need more work:
69 *
70 * - FreeType works in 26.6 mode. Clients can decide to use that mode, and everything
71 * would work fine. However, we also abuse this API for performing in font-space,
72 * but don't pass the correct flags to FreeType. We just abuse the no-hinting mode
73 * for that, such that no rounding etc happens. As such, we don't set ppem, and
74 * pass NO_HINTING as load_flags. Would be much better to use NO_SCALE, and scale
75 * ourselves.
76 *
77 * - We don't handle / allow for emboldening / obliqueing.
78 *
79 * - In the future, we should add constructors to create fonts in font space?
80 */
81
82
83 using hb_ft_advance_cache_t = hb_cache_t<16, 24, 8, false>;
84
85 struct hb_ft_font_t
86 {
87 int load_flags;
88 bool symbol; /* Whether selected cmap is symbol cmap. */
89 bool unref; /* Whether to destroy ft_face when done. */
90 bool transform; /* Whether to apply FT_Face's transform. */
91
92 mutable hb_mutex_t lock; /* Protects members below. */
93 FT_Face ft_face;
94 mutable unsigned cached_serial;
95 mutable hb_ft_advance_cache_t advance_cache;
96 };
97
98 static hb_ft_font_t *
99 _hb_ft_font_create (FT_Face ft_face, bool symbol, bool unref)
100 {
101 hb_ft_font_t *ft_font = (hb_ft_font_t *) hb_calloc (1, sizeof (hb_ft_font_t));
102 if (unlikely (!ft_font)) return nullptr;
103
104 ft_font->lock.init ();
105 ft_font->ft_face = ft_face;
106 ft_font->symbol = symbol;
107 ft_font->unref = unref;
108
109 ft_font->load_flags = FT_LOAD_DEFAULT | FT_LOAD_NO_HINTING;
110
111 ft_font->cached_serial = (unsigned) -1;
112 ft_font->advance_cache.init ();
113
114 return ft_font;
115 }
116
117 static void
118 _hb_ft_face_destroy (void *data)
119 {
120 FT_Done_Face ((FT_Face) data);
121 }
122
123 static void
124 _hb_ft_font_destroy (void *data)
125 {
126 hb_ft_font_t *ft_font = (hb_ft_font_t *) data;
127
128 ft_font->advance_cache.fini ();
129
130 if (ft_font->unref)
131 _hb_ft_face_destroy (ft_font->ft_face);
132
133 ft_font->lock.fini ();
134
135 hb_free (ft_font);
136 }
137
138
139 /* hb_font changed, update FT_Face. */
140 static void _hb_ft_hb_font_changed (hb_font_t *font, FT_Face ft_face)
141 {
142 hb_ft_font_t *ft_font = (hb_ft_font_t *) font->user_data;
143
144 float x_mult = 1.f, y_mult = 1.f;
145
146 if (font->x_scale < 0) x_mult = -x_mult;
147 if (font->y_scale < 0) y_mult = -y_mult;
148
149 if (FT_Set_Char_Size (ft_face,
150 abs (font->x_scale), abs (font->y_scale),
151 0, 0
152 #if 0
153 font->x_ppem * 72 * 64 / font->x_scale,
154 font->y_ppem * 72 * 64 / font->y_scale
155 #endif
156 ) && ft_face->num_fixed_sizes)
157 {
158 #ifdef HAVE_FT_GET_TRANSFORM
159 /* Bitmap font, eg. bitmap color emoji. */
160 /* TODO Pick largest size? */
161 int x_scale = ft_face->available_sizes[0].x_ppem;
162 int y_scale = ft_face->available_sizes[0].y_ppem;
163 FT_Set_Char_Size (ft_face,
164 x_scale, y_scale,
165 0, 0);
166
167 /* This contains the sign that was previously in x_mult/y_mult. */
168 x_mult = (float) font->x_scale / x_scale;
169 y_mult = (float) font->y_scale / y_scale;
170 #endif
171 }
172 else
173 { /* Shrug */ }
174
175
176 if (x_mult != 1.f || y_mult != 1.f)
177 {
178 FT_Matrix matrix = { (int) roundf (x_mult * (1<<16)), 0,
179 0, (int) roundf (y_mult * (1<<16))};
180 FT_Set_Transform (ft_face, &matrix, nullptr);
181 ft_font->transform = true;
182 }
183
184 #if defined(HAVE_FT_GET_VAR_BLEND_COORDINATES) && !defined(HB_NO_VAR)
185 unsigned int num_coords;
186 const float *coords = hb_font_get_var_coords_design (font, &num_coords);
187 if (num_coords)
188 {
189 FT_Fixed *ft_coords = (FT_Fixed *) hb_calloc (num_coords, sizeof (FT_Fixed));
190 if (ft_coords)
191 {
192 for (unsigned int i = 0; i < num_coords; i++)
193 ft_coords[i] = coords[i] * 65536.f;
194 FT_Set_Var_Design_Coordinates (ft_face, num_coords, ft_coords);
195 hb_free (ft_coords);
196 }
197 }
198 #endif
199 }
200
201 /* Check if hb_font changed, update FT_Face. */
202 static inline bool
203 _hb_ft_hb_font_check_changed (hb_font_t *font,
204 const hb_ft_font_t *ft_font)
205 {
206 if (font->serial != ft_font->cached_serial)
207 {
208 _hb_ft_hb_font_changed (font, ft_font->ft_face);
209 ft_font->advance_cache.clear ();
210 ft_font->cached_serial = font->serial;
211 return true;
212 }
213 return false;
214 }
215
216
217 /**
218 * hb_ft_font_set_load_flags:
219 * @font: #hb_font_t to work upon
220 * @load_flags: The FreeType load flags to set
221 *
222 * Sets the FT_Load_Glyph load flags for the specified #hb_font_t.
223 *
224 * For more information, see
225 * https://www.freetype.org/freetype2/docs/reference/ft2-base_interface.html#ft_load_xxx
226 *
227 * Since: 1.0.5
228 **/
229 void
230 hb_ft_font_set_load_flags (hb_font_t *font, int load_flags)
231 {
232 if (hb_object_is_immutable (font))
233 return;
234
235 if (unlikely (font->destroy != (hb_destroy_func_t) _hb_ft_font_destroy))
236 return;
237
238 hb_ft_font_t *ft_font = (hb_ft_font_t *) font->user_data;
239
240 ft_font->load_flags = load_flags;
241 }
242
243 /**
244 * hb_ft_font_get_load_flags:
245 * @font: #hb_font_t to work upon
246 *
247 * Fetches the FT_Load_Glyph load flags of the specified #hb_font_t.
248 *
249 * For more information, see
250 * https://www.freetype.org/freetype2/docs/reference/ft2-base_interface.html#ft_load_xxx
251 *
252 * Return value: FT_Load_Glyph flags found
253 *
254 * Since: 1.0.5
255 **/
256 int
257 hb_ft_font_get_load_flags (hb_font_t *font)
258 {
259 if (unlikely (font->destroy != (hb_destroy_func_t) _hb_ft_font_destroy))
260 return 0;
261
262 const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font->user_data;
263
264 return ft_font->load_flags;
265 }
266
267 /**
268 * hb_ft_font_get_face: (skip)
269 * @font: #hb_font_t to work upon
270 *
271 * Fetches the FT_Face associated with the specified #hb_font_t
272 * font object.
273 *
274 * Return value: (nullable): the FT_Face found or `NULL`
275 *
276 * Since: 0.9.2
277 **/
278 FT_Face
279 hb_ft_font_get_face (hb_font_t *font)
280 {
281 if (unlikely (font->destroy != (hb_destroy_func_t) _hb_ft_font_destroy))
282 return nullptr;
283
284 const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font->user_data;
285
286 return ft_font->ft_face;
287 }
288
289 /**
290 * hb_ft_font_lock_face: (skip)
291 * @font: #hb_font_t to work upon
292 *
293 * Gets the FT_Face associated with @font, This face will be kept around until
294 * you call hb_ft_font_unlock_face().
295 *
296 * Return value: (nullable) (transfer none): the FT_Face associated with @font or `NULL`
297 * Since: 2.6.5
298 **/
299 FT_Face
300 hb_ft_font_lock_face (hb_font_t *font)
301 {
302 if (unlikely (font->destroy != (hb_destroy_func_t) _hb_ft_font_destroy))
303 return nullptr;
304
305 const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font->user_data;
306
307 ft_font->lock.lock ();
308
309 return ft_font->ft_face;
310 }
311
312 /**
313 * hb_ft_font_unlock_face: (skip)
314 * @font: #hb_font_t to work upon
315 *
316 * Releases an FT_Face previously obtained with hb_ft_font_lock_face().
317 *
318 * Since: 2.6.5
319 **/
320 void
321 hb_ft_font_unlock_face (hb_font_t *font)
322 {
323 if (unlikely (font->destroy != (hb_destroy_func_t) _hb_ft_font_destroy))
324 return;
325
326 const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font->user_data;
327
328 ft_font->lock.unlock ();
329 }
330
331
332 static hb_bool_t
333 hb_ft_get_nominal_glyph (hb_font_t *font,
334 void *font_data,
335 hb_codepoint_t unicode,
336 hb_codepoint_t *glyph,
337 void *user_data HB_UNUSED)
338 {
339 const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
340 hb_lock_t lock (ft_font->lock);
341 unsigned int g = FT_Get_Char_Index (ft_font->ft_face, unicode);
342
343 if (unlikely (!g))
344 {
345 if (unlikely (ft_font->symbol))
346 {
347 switch ((unsigned) font->face->table.OS2->get_font_page ()) {
348 case OT::OS2::font_page_t::FONT_PAGE_NONE:
349 if (unicode <= 0x00FFu)
350 /* For symbol-encoded OpenType fonts, we duplicate the
351 * U+F000..F0FF range at U+0000..U+00FF. That's what
352 * Windows seems to do, and that's hinted about at:
353 * https://docs.microsoft.com/en-us/typography/opentype/spec/recom
354 * under "Non-Standard (Symbol) Fonts". */
355 g = FT_Get_Char_Index (ft_font->ft_face, 0xF000u + unicode);
356 break;
357 #ifndef HB_NO_OT_SHAPER_ARABIC_FALLBACK
358 case OT::OS2::font_page_t::FONT_PAGE_SIMP_ARABIC:
359 g = FT_Get_Char_Index (ft_font->ft_face, _hb_arabic_pua_simp_map (unicode));
360 break;
361 case OT::OS2::font_page_t::FONT_PAGE_TRAD_ARABIC:
362 g = FT_Get_Char_Index (ft_font->ft_face, _hb_arabic_pua_trad_map (unicode));
363 break;
364 #endif
365 default:
366 break;
367 }
368 if (!g)
369 return false;
370 }
371 else
372 return false;
373 }
374
375 *glyph = g;
376 return true;
377 }
378
379 static unsigned int
380 hb_ft_get_nominal_glyphs (hb_font_t *font HB_UNUSED,
381 void *font_data,
382 unsigned int count,
383 const hb_codepoint_t *first_unicode,
384 unsigned int unicode_stride,
385 hb_codepoint_t *first_glyph,
386 unsigned int glyph_stride,
387 void *user_data HB_UNUSED)
388 {
389 const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
390 hb_lock_t lock (ft_font->lock);
391 unsigned int done;
392 for (done = 0;
393 done < count && (*first_glyph = FT_Get_Char_Index (ft_font->ft_face, *first_unicode));
394 done++)
395 {
396 first_unicode = &StructAtOffsetUnaligned<hb_codepoint_t> (first_unicode, unicode_stride);
397 first_glyph = &StructAtOffsetUnaligned<hb_codepoint_t> (first_glyph, glyph_stride);
398 }
399 /* We don't need to do ft_font->symbol dance here, since HB calls the singular
400 * nominal_glyph() for what we don't handle here. */
401 return done;
402 }
403
404
405 static hb_bool_t
406 hb_ft_get_variation_glyph (hb_font_t *font HB_UNUSED,
407 void *font_data,
408 hb_codepoint_t unicode,
409 hb_codepoint_t variation_selector,
410 hb_codepoint_t *glyph,
411 void *user_data HB_UNUSED)
412 {
413 const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
414 hb_lock_t lock (ft_font->lock);
415 unsigned int g = FT_Face_GetCharVariantIndex (ft_font->ft_face, unicode, variation_selector);
416
417 if (unlikely (!g))
418 return false;
419
420 *glyph = g;
421 return true;
422 }
423
424 static void
425 hb_ft_get_glyph_h_advances (hb_font_t* font, void* font_data,
426 unsigned count,
427 const hb_codepoint_t *first_glyph,
428 unsigned glyph_stride,
429 hb_position_t *first_advance,
430 unsigned advance_stride,
431 void *user_data HB_UNUSED)
432 {
433 const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
434 hb_lock_t lock (ft_font->lock);
435 FT_Face ft_face = ft_font->ft_face;
436 int load_flags = ft_font->load_flags;
437 float x_mult;
438 #ifdef HAVE_FT_GET_TRANSFORM
439 if (ft_font->transform)
440 {
441 FT_Matrix matrix;
442 FT_Get_Transform (ft_face, &matrix, nullptr);
443 x_mult = sqrtf ((float)matrix.xx * matrix.xx + (float)matrix.xy * matrix.xy) / 65536.f;
444 }
445 else
446 #endif
447 {
448 x_mult = font->x_scale < 0 ? -1 : +1;
449 }
450
451 for (unsigned int i = 0; i < count; i++)
452 {
453 FT_Fixed v = 0;
454 hb_codepoint_t glyph = *first_glyph;
455
456 unsigned int cv;
457 if (ft_font->advance_cache.get (glyph, &cv))
458 v = cv;
459 else
460 {
461 FT_Get_Advance (ft_face, glyph, load_flags, &v);
462 ft_font->advance_cache.set (glyph, v);
463 }
464
465 *first_advance = (int) (v * x_mult + (1<<9)) >> 10;
466 first_glyph = &StructAtOffsetUnaligned<hb_codepoint_t> (first_glyph, glyph_stride);
467 first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride);
468 }
469 }
470
471 #ifndef HB_NO_VERTICAL
472 static hb_position_t
473 hb_ft_get_glyph_v_advance (hb_font_t *font,
474 void *font_data,
475 hb_codepoint_t glyph,
476 void *user_data HB_UNUSED)
477 {
478 const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
479 hb_lock_t lock (ft_font->lock);
480 FT_Fixed v;
481 float y_mult;
482 #ifdef HAVE_FT_GET_TRANSFORM
483 if (ft_font->transform)
484 {
485 FT_Matrix matrix;
486 FT_Get_Transform (ft_font->ft_face, &matrix, nullptr);
487 y_mult = sqrtf ((float)matrix.yx * matrix.yx + (float)matrix.yy * matrix.yy) / 65536.f;
488 }
489 else
490 #endif
491 {
492 y_mult = font->y_scale < 0 ? -1 : +1;
493 }
494
495 if (unlikely (FT_Get_Advance (ft_font->ft_face, glyph, ft_font->load_flags | FT_LOAD_VERTICAL_LAYOUT, &v)))
496 return 0;
497
498 v = (int) (y_mult * v);
499
500 /* Note: FreeType's vertical metrics grows downward while other FreeType coordinates
501 * have a Y growing upward. Hence the extra negation. */
502
503 return (-v + (1<<9)) >> 10;
504 }
505 #endif
506
507 #ifndef HB_NO_VERTICAL
508 static hb_bool_t
509 hb_ft_get_glyph_v_origin (hb_font_t *font,
510 void *font_data,
511 hb_codepoint_t glyph,
512 hb_position_t *x,
513 hb_position_t *y,
514 void *user_data HB_UNUSED)
515 {
516 const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
517 hb_lock_t lock (ft_font->lock);
518 FT_Face ft_face = ft_font->ft_face;
519 float x_mult, y_mult;
520 #ifdef HAVE_FT_GET_TRANSFORM
521 if (ft_font->transform)
522 {
523 FT_Matrix matrix;
524 FT_Get_Transform (ft_face, &matrix, nullptr);
525 x_mult = sqrtf ((float)matrix.xx * matrix.xx + (float)matrix.xy * matrix.xy) / 65536.f;
526 y_mult = sqrtf ((float)matrix.yx * matrix.yx + (float)matrix.yy * matrix.yy) / 65536.f;
527 }
528 else
529 #endif
530 {
531 x_mult = font->x_scale < 0 ? -1 : +1;
532 y_mult = font->y_scale < 0 ? -1 : +1;
533 }
534
535 if (unlikely (FT_Load_Glyph (ft_face, glyph, ft_font->load_flags)))
536 return false;
537
538 /* Note: FreeType's vertical metrics grows downward while other FreeType coordinates
539 * have a Y growing upward. Hence the extra negation. */
540 *x = ft_face->glyph->metrics.horiBearingX - ft_face->glyph->metrics.vertBearingX;
541 *y = ft_face->glyph->metrics.horiBearingY - (-ft_face->glyph->metrics.vertBearingY);
542
543 *x = (hb_position_t) (x_mult * *x);
544 *y = (hb_position_t) (y_mult * *y);
545
546 return true;
547 }
548 #endif
549
550 #ifndef HB_NO_OT_SHAPE_FALLBACK
551 static hb_position_t
552 hb_ft_get_glyph_h_kerning (hb_font_t *font,
553 void *font_data,
554 hb_codepoint_t left_glyph,
555 hb_codepoint_t right_glyph,
556 void *user_data HB_UNUSED)
557 {
558 const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
559 hb_lock_t lock (ft_font->lock);
560 FT_Vector kerningv;
561
562 FT_Kerning_Mode mode = font->x_ppem ? FT_KERNING_DEFAULT : FT_KERNING_UNFITTED;
563 if (FT_Get_Kerning (ft_font->ft_face, left_glyph, right_glyph, mode, &kerningv))
564 return 0;
565
566 return kerningv.x;
567 }
568 #endif
569
570 static hb_bool_t
571 hb_ft_get_glyph_extents (hb_font_t *font,
572 void *font_data,
573 hb_codepoint_t glyph,
574 hb_glyph_extents_t *extents,
575 void *user_data HB_UNUSED)
576 {
577 const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
578 hb_lock_t lock (ft_font->lock);
579 FT_Face ft_face = ft_font->ft_face;
580 float x_mult, y_mult;
581 #ifdef HAVE_FT_GET_TRANSFORM
582 if (ft_font->transform)
583 {
584 FT_Matrix matrix;
585 FT_Get_Transform (ft_face, &matrix, nullptr);
586 x_mult = sqrtf ((float)matrix.xx * matrix.xx + (float)matrix.xy * matrix.xy) / 65536.f;
587 y_mult = sqrtf ((float)matrix.yx * matrix.yx + (float)matrix.yy * matrix.yy) / 65536.f;
588 }
589 else
590 #endif
591 {
592 x_mult = font->x_scale < 0 ? -1 : +1;
593 y_mult = font->y_scale < 0 ? -1 : +1;
594 }
595
596 if (unlikely (FT_Load_Glyph (ft_face, glyph, ft_font->load_flags)))
597 return false;
598
599 extents->x_bearing = (hb_position_t) (x_mult * ft_face->glyph->metrics.horiBearingX);
600 extents->y_bearing = (hb_position_t) (y_mult * ft_face->glyph->metrics.horiBearingY);
601 extents->width = (hb_position_t) (x_mult * ft_face->glyph->metrics.width);
602 extents->height = (hb_position_t) (y_mult * -ft_face->glyph->metrics.height);
603
604 return true;
605 }
606
607 static hb_bool_t
608 hb_ft_get_glyph_contour_point (hb_font_t *font HB_UNUSED,
609 void *font_data,
610 hb_codepoint_t glyph,
611 unsigned int point_index,
612 hb_position_t *x,
613 hb_position_t *y,
614 void *user_data HB_UNUSED)
615 {
616 const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
617 hb_lock_t lock (ft_font->lock);
618 FT_Face ft_face = ft_font->ft_face;
619
620 if (unlikely (FT_Load_Glyph (ft_face, glyph, ft_font->load_flags)))
621 return false;
622
623 if (unlikely (ft_face->glyph->format != FT_GLYPH_FORMAT_OUTLINE))
624 return false;
625
626 if (unlikely (point_index >= (unsigned int) ft_face->glyph->outline.n_points))
627 return false;
628
629 *x = ft_face->glyph->outline.points[point_index].x;
630 *y = ft_face->glyph->outline.points[point_index].y;
631
632 return true;
633 }
634
635 static hb_bool_t
636 hb_ft_get_glyph_name (hb_font_t *font HB_UNUSED,
637 void *font_data,
638 hb_codepoint_t glyph,
639 char *name, unsigned int size,
640 void *user_data HB_UNUSED)
641 {
642 const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
643 hb_lock_t lock (ft_font->lock);
644 FT_Face ft_face = ft_font->ft_face;
645
646 hb_bool_t ret = !FT_Get_Glyph_Name (ft_face, glyph, name, size);
647 if (ret && (size && !*name))
648 ret = false;
649
650 return ret;
651 }
652
653 static hb_bool_t
654 hb_ft_get_glyph_from_name (hb_font_t *font HB_UNUSED,
655 void *font_data,
656 const char *name, int len, /* -1 means nul-terminated */
657 hb_codepoint_t *glyph,
658 void *user_data HB_UNUSED)
659 {
660 const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
661 hb_lock_t lock (ft_font->lock);
662 FT_Face ft_face = ft_font->ft_face;
663
664 if (len < 0)
665 *glyph = FT_Get_Name_Index (ft_face, (FT_String *) name);
666 else {
667 /* Make a nul-terminated version. */
668 char buf[128];
669 len = hb_min (len, (int) sizeof (buf) - 1);
670 strncpy (buf, name, len);
671 buf[len] = '\0';
672 *glyph = FT_Get_Name_Index (ft_face, buf);
673 }
674
675 if (*glyph == 0)
676 {
677 /* Check whether the given name was actually the name of glyph 0. */
678 char buf[128];
679 if (!FT_Get_Glyph_Name(ft_face, 0, buf, sizeof (buf)) &&
680 len < 0 ? !strcmp (buf, name) : !strncmp (buf, name, len))
681 return true;
682 }
683
684 return *glyph != 0;
685 }
686
687 static hb_bool_t
688 hb_ft_get_font_h_extents (hb_font_t *font HB_UNUSED,
689 void *font_data,
690 hb_font_extents_t *metrics,
691 void *user_data HB_UNUSED)
692 {
693 const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
694 hb_lock_t lock (ft_font->lock);
695 FT_Face ft_face = ft_font->ft_face;
696 float y_mult;
697 #ifdef HAVE_FT_GET_TRANSFORM
698 if (ft_font->transform)
699 {
700 FT_Matrix matrix;
701 FT_Get_Transform (ft_face, &matrix, nullptr);
702 y_mult = sqrtf ((float)matrix.yx * matrix.yx + (float)matrix.yy * matrix.yy) / 65536.f;
703 }
704 else
705 #endif
706 {
707 y_mult = font->y_scale < 0 ? -1 : +1;
708 }
709
710 if (ft_face->units_per_EM != 0)
711 {
712 metrics->ascender = FT_MulFix(ft_face->ascender, ft_face->size->metrics.y_scale);
713 metrics->descender = FT_MulFix(ft_face->descender, ft_face->size->metrics.y_scale);
714 metrics->line_gap = FT_MulFix( ft_face->height, ft_face->size->metrics.y_scale ) - (metrics->ascender - metrics->descender);
715 }
716 else
717 {
718 /* Bitmap-only font, eg. color bitmap font. */
719 metrics->ascender = ft_face->size->metrics.ascender;
720 metrics->descender = ft_face->size->metrics.descender;
721 metrics->line_gap = ft_face->size->metrics.height - (metrics->ascender - metrics->descender);
722 }
723
724 metrics->ascender = (hb_position_t) (y_mult * metrics->ascender);
725 metrics->descender = (hb_position_t) (y_mult * metrics->descender);
726 metrics->line_gap = (hb_position_t) (y_mult * metrics->line_gap);
727
728 return true;
729 }
730
731 #ifndef HB_NO_DRAW
732
733 static int
734 _hb_ft_move_to (const FT_Vector *to,
735 void *arg)
736 {
737 hb_draw_session_t *drawing = (hb_draw_session_t *) arg;
738 drawing->move_to (to->x, to->y);
739 return FT_Err_Ok;
740 }
741
742 static int
743 _hb_ft_line_to (const FT_Vector *to,
744 void *arg)
745 {
746 hb_draw_session_t *drawing = (hb_draw_session_t *) arg;
747 drawing->line_to (to->x, to->y);
748 return FT_Err_Ok;
749 }
750
751 static int
752 _hb_ft_conic_to (const FT_Vector *control,
753 const FT_Vector *to,
754 void *arg)
755 {
756 hb_draw_session_t *drawing = (hb_draw_session_t *) arg;
757 drawing->quadratic_to (control->x, control->y,
758 to->x, to->y);
759 return FT_Err_Ok;
760 }
761
762 static int
763 _hb_ft_cubic_to (const FT_Vector *control1,
764 const FT_Vector *control2,
765 const FT_Vector *to,
766 void *arg)
767 {
768 hb_draw_session_t *drawing = (hb_draw_session_t *) arg;
769 drawing->cubic_to (control1->x, control1->y,
770 control2->x, control2->y,
771 to->x, to->y);
772 return FT_Err_Ok;
773 }
774
775 static void
776 hb_ft_get_glyph_shape (hb_font_t *font HB_UNUSED,
777 void *font_data,
778 hb_codepoint_t glyph,
779 hb_draw_funcs_t *draw_funcs, void *draw_data,
780 void *user_data HB_UNUSED)
781 {
782 const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
783 hb_lock_t lock (ft_font->lock);
784 FT_Face ft_face = ft_font->ft_face;
785
786 if (unlikely (FT_Load_Glyph (ft_face, glyph,
787 FT_LOAD_NO_BITMAP | ft_font->load_flags)))
788 return;
789
790 if (ft_face->glyph->format != FT_GLYPH_FORMAT_OUTLINE)
791 return;
792
793 const FT_Outline_Funcs outline_funcs = {
794 _hb_ft_move_to,
795 _hb_ft_line_to,
796 _hb_ft_conic_to,
797 _hb_ft_cubic_to,
798 0, /* shift */
799 0, /* delta */
800 };
801
802 hb_draw_session_t draw_session (draw_funcs, draw_data, font->slant_xy);
803
804 FT_Outline_Decompose (&ft_face->glyph->outline,
805 &outline_funcs,
806 &draw_session);
807 }
808 #endif
809
810
811 static inline void free_static_ft_funcs ();
812
813 static struct hb_ft_font_funcs_lazy_loader_t : hb_font_funcs_lazy_loader_t<hb_ft_font_funcs_lazy_loader_t>
814 {
815 static hb_font_funcs_t *create ()
816 {
817 hb_font_funcs_t *funcs = hb_font_funcs_create ();
818
819 hb_font_funcs_set_nominal_glyph_func (funcs, hb_ft_get_nominal_glyph, nullptr, nullptr);
820 hb_font_funcs_set_nominal_glyphs_func (funcs, hb_ft_get_nominal_glyphs, nullptr, nullptr);
821 hb_font_funcs_set_variation_glyph_func (funcs, hb_ft_get_variation_glyph, nullptr, nullptr);
822
823 hb_font_funcs_set_font_h_extents_func (funcs, hb_ft_get_font_h_extents, nullptr, nullptr);
824 hb_font_funcs_set_glyph_h_advances_func (funcs, hb_ft_get_glyph_h_advances, nullptr, nullptr);
825 //hb_font_funcs_set_glyph_h_origin_func (funcs, hb_ft_get_glyph_h_origin, nullptr, nullptr);
826
827 #ifndef HB_NO_VERTICAL
828 //hb_font_funcs_set_font_v_extents_func (funcs, hb_ft_get_font_v_extents, nullptr, nullptr);
829 hb_font_funcs_set_glyph_v_advance_func (funcs, hb_ft_get_glyph_v_advance, nullptr, nullptr);
830 hb_font_funcs_set_glyph_v_origin_func (funcs, hb_ft_get_glyph_v_origin, nullptr, nullptr);
831 #endif
832
833 #ifndef HB_NO_OT_SHAPE_FALLBACK
834 hb_font_funcs_set_glyph_h_kerning_func (funcs, hb_ft_get_glyph_h_kerning, nullptr, nullptr);
835 #endif
836 //hb_font_funcs_set_glyph_v_kerning_func (funcs, hb_ft_get_glyph_v_kerning, nullptr, nullptr);
837 hb_font_funcs_set_glyph_extents_func (funcs, hb_ft_get_glyph_extents, nullptr, nullptr);
838 hb_font_funcs_set_glyph_contour_point_func (funcs, hb_ft_get_glyph_contour_point, nullptr, nullptr);
839 hb_font_funcs_set_glyph_name_func (funcs, hb_ft_get_glyph_name, nullptr, nullptr);
840 hb_font_funcs_set_glyph_from_name_func (funcs, hb_ft_get_glyph_from_name, nullptr, nullptr);
841
842 #ifndef HB_NO_DRAW
843 hb_font_funcs_set_glyph_shape_func (funcs, hb_ft_get_glyph_shape, nullptr, nullptr);
844 #endif
845
846 hb_font_funcs_make_immutable (funcs);
847
848 hb_atexit (free_static_ft_funcs);
849
850 return funcs;
851 }
852 } static_ft_funcs;
853
854 static inline
855 void free_static_ft_funcs ()
856 {
857 static_ft_funcs.free_instance ();
858 }
859
860 static hb_font_funcs_t *
861 _hb_ft_get_font_funcs ()
862 {
863 return static_ft_funcs.get_unconst ();
864 }
865
866 static void
867 _hb_ft_font_set_funcs (hb_font_t *font, FT_Face ft_face, bool unref)
868 {
869 bool symbol = ft_face->charmap && ft_face->charmap->encoding == FT_ENCODING_MS_SYMBOL;
870
871 hb_ft_font_t *ft_font = _hb_ft_font_create (ft_face, symbol, unref);
872 if (unlikely (!ft_font)) return;
873
874 hb_font_set_funcs (font,
875 _hb_ft_get_font_funcs (),
876 ft_font,
877 _hb_ft_font_destroy);
878 }
879
880
881 static hb_blob_t *
882 _hb_ft_reference_table (hb_face_t *face HB_UNUSED, hb_tag_t tag, void *user_data)
883 {
884 FT_Face ft_face = (FT_Face) user_data;
885 FT_Byte *buffer;
886 FT_ULong length = 0;
887 FT_Error error;
888
889 /* Note: FreeType like HarfBuzz uses the NONE tag for fetching the entire blob */
890
891 error = FT_Load_Sfnt_Table (ft_face, tag, 0, nullptr, &length);
892 if (error)
893 return nullptr;
894
895 buffer = (FT_Byte *) hb_malloc (length);
896 if (!buffer)
897 return nullptr;
898
899 error = FT_Load_Sfnt_Table (ft_face, tag, 0, buffer, &length);
900 if (error)
901 {
902 hb_free (buffer);
903 return nullptr;
904 }
905
906 return hb_blob_create ((const char *) buffer, length,
907 HB_MEMORY_MODE_WRITABLE,
908 buffer, hb_free);
909 }
910
911 /**
912 * hb_ft_face_create:
913 * @ft_face: (destroy destroy) (scope notified): FT_Face to work upon
914 * @destroy: (nullable): A callback to call when the face object is not needed anymore
915 *
916 * Creates an #hb_face_t face object from the specified FT_Face.
917 *
918 * This variant of the function does not provide any life-cycle management.
919 *
920 * Most client programs should use hb_ft_face_create_referenced()
921 * (or, perhaps, hb_ft_face_create_cached()) instead.
922 *
923 * If you know you have valid reasons not to use hb_ft_face_create_referenced(),
924 * then it is the client program's responsibility to destroy @ft_face
925 * after the #hb_face_t face object has been destroyed.
926 *
927 * Return value: (transfer full): the new #hb_face_t face object
928 *
929 * Since: 0.9.2
930 **/
931 hb_face_t *
932 hb_ft_face_create (FT_Face ft_face,
933 hb_destroy_func_t destroy)
934 {
935 hb_face_t *face;
936
937 if (!ft_face->stream->read) {
938 hb_blob_t *blob;
939
940 blob = hb_blob_create ((const char *) ft_face->stream->base,
941 (unsigned int) ft_face->stream->size,
942 HB_MEMORY_MODE_READONLY,
943 ft_face, destroy);
944 face = hb_face_create (blob, ft_face->face_index);
945 hb_blob_destroy (blob);
946 } else {
947 face = hb_face_create_for_tables (_hb_ft_reference_table, ft_face, destroy);
948 }
949
950 hb_face_set_index (face, ft_face->face_index);
951 hb_face_set_upem (face, ft_face->units_per_EM);
952
953 return face;
954 }
955
956 /**
957 * hb_ft_face_create_referenced:
958 * @ft_face: FT_Face to work upon
959 *
960 * Creates an #hb_face_t face object from the specified FT_Face.
961 *
962 * This is the preferred variant of the hb_ft_face_create*
963 * function family, because it calls FT_Reference_Face() on @ft_face,
964 * ensuring that @ft_face remains alive as long as the resulting
965 * #hb_face_t face object remains alive. Also calls FT_Done_Face()
966 * when the #hb_face_t face object is destroyed.
967 *
968 * Use this version unless you know you have good reasons not to.
969 *
970 * Return value: (transfer full): the new #hb_face_t face object
971 *
972 * Since: 0.9.38
973 **/
974 hb_face_t *
975 hb_ft_face_create_referenced (FT_Face ft_face)
976 {
977 FT_Reference_Face (ft_face);
978 return hb_ft_face_create (ft_face, _hb_ft_face_destroy);
979 }
980
981 static void
982 hb_ft_face_finalize (void *arg)
983 {
984 FT_Face ft_face = (FT_Face) arg;
985 hb_face_destroy ((hb_face_t *) ft_face->generic.data);
986 }
987
988 /**
989 * hb_ft_face_create_cached:
990 * @ft_face: FT_Face to work upon
991 *
992 * Creates an #hb_face_t face object from the specified FT_Face.
993 *
994 * This variant of the function caches the newly created #hb_face_t
995 * face object, using the @generic pointer of @ft_face. Subsequent function
996 * calls that are passed the same @ft_face parameter will have the same
997 * #hb_face_t returned to them, and that #hb_face_t will be correctly
998 * reference counted.
999 *
1000 * However, client programs are still responsible for destroying
1001 * @ft_face after the last #hb_face_t face object has been destroyed.
1002 *
1003 * Return value: (transfer full): the new #hb_face_t face object
1004 *
1005 * Since: 0.9.2
1006 **/
1007 hb_face_t *
1008 hb_ft_face_create_cached (FT_Face ft_face)
1009 {
1010 if (unlikely (!ft_face->generic.data || ft_face->generic.finalizer != (FT_Generic_Finalizer) hb_ft_face_finalize))
1011 {
1012 if (ft_face->generic.finalizer)
1013 ft_face->generic.finalizer (ft_face);
1014
1015 ft_face->generic.data = hb_ft_face_create (ft_face, nullptr);
1016 ft_face->generic.finalizer = hb_ft_face_finalize;
1017 }
1018
1019 return hb_face_reference ((hb_face_t *) ft_face->generic.data);
1020 }
1021
1022 /**
1023 * hb_ft_font_create:
1024 * @ft_face: (destroy destroy) (scope notified): FT_Face to work upon
1025 * @destroy: (nullable): A callback to call when the font object is not needed anymore
1026 *
1027 * Creates an #hb_font_t font object from the specified FT_Face.
1028 *
1029 * <note>Note: You must set the face size on @ft_face before calling
1030 * hb_ft_font_create() on it. HarfBuzz assumes size is always set and will
1031 * access `size` member of FT_Face unconditionally.</note>
1032 *
1033 * This variant of the function does not provide any life-cycle management.
1034 *
1035 * Most client programs should use hb_ft_font_create_referenced()
1036 * instead.
1037 *
1038 * If you know you have valid reasons not to use hb_ft_font_create_referenced(),
1039 * then it is the client program's responsibility to destroy @ft_face
1040 * after the #hb_font_t font object has been destroyed.
1041 *
1042 * HarfBuzz will use the @destroy callback on the #hb_font_t font object
1043 * if it is supplied when you use this function. However, even if @destroy
1044 * is provided, it is the client program's responsibility to destroy @ft_face,
1045 * and it is the client program's responsibility to ensure that @ft_face is
1046 * destroyed only after the #hb_font_t font object has been destroyed.
1047 *
1048 * Return value: (transfer full): the new #hb_font_t font object
1049 *
1050 * Since: 0.9.2
1051 **/
1052 hb_font_t *
1053 hb_ft_font_create (FT_Face ft_face,
1054 hb_destroy_func_t destroy)
1055 {
1056 hb_font_t *font;
1057 hb_face_t *face;
1058
1059 face = hb_ft_face_create (ft_face, destroy);
1060 font = hb_font_create (face);
1061 hb_face_destroy (face);
1062 _hb_ft_font_set_funcs (font, ft_face, false);
1063 hb_ft_font_changed (font);
1064 return font;
1065 }
1066
1067 /**
1068 * hb_ft_font_changed:
1069 * @font: #hb_font_t to work upon
1070 *
1071 * Refreshes the state of @font when the underlying FT_Face has changed.
1072 * This function should be called after changing the size or
1073 * variation-axis settings on the FT_Face.
1074 *
1075 * Since: 1.0.5
1076 **/
1077 void
1078 hb_ft_font_changed (hb_font_t *font)
1079 {
1080 if (font->destroy != (hb_destroy_func_t) _hb_ft_font_destroy)
1081 return;
1082
1083 hb_ft_font_t *ft_font = (hb_ft_font_t *) font->user_data;
1084
1085 FT_Face ft_face = ft_font->ft_face;
1086
1087 hb_font_set_scale (font,
1088 (int) (((uint64_t) ft_face->size->metrics.x_scale * (uint64_t) ft_face->units_per_EM + (1u<<15)) >> 16),
1089 (int) (((uint64_t) ft_face->size->metrics.y_scale * (uint64_t) ft_face->units_per_EM + (1u<<15)) >> 16));
1090 #if 0 /* hb-ft works in no-hinting model */
1091 hb_font_set_ppem (font,
1092 ft_face->size->metrics.x_ppem,
1093 ft_face->size->metrics.y_ppem);
1094 #endif
1095
1096 #if defined(HAVE_FT_GET_VAR_BLEND_COORDINATES) && !defined(HB_NO_VAR)
1097 FT_MM_Var *mm_var = nullptr;
1098 if (!FT_Get_MM_Var (ft_face, &mm_var))
1099 {
1100 FT_Fixed *ft_coords = (FT_Fixed *) hb_calloc (mm_var->num_axis, sizeof (FT_Fixed));
1101 int *coords = (int *) hb_calloc (mm_var->num_axis, sizeof (int));
1102 if (coords && ft_coords)
1103 {
1104 if (!FT_Get_Var_Blend_Coordinates (ft_face, mm_var->num_axis, ft_coords))
1105 {
1106 bool nonzero = false;
1107
1108 for (unsigned int i = 0; i < mm_var->num_axis; ++i)
1109 {
1110 coords[i] = ft_coords[i] >>= 2;
1111 nonzero = nonzero || coords[i];
1112 }
1113
1114 if (nonzero)
1115 hb_font_set_var_coords_normalized (font, coords, mm_var->num_axis);
1116 else
1117 hb_font_set_var_coords_normalized (font, nullptr, 0);
1118 }
1119 }
1120 hb_free (coords);
1121 hb_free (ft_coords);
1122 #ifdef HAVE_FT_DONE_MM_VAR
1123 FT_Done_MM_Var (ft_face->glyph->library, mm_var);
1124 #else
1125 hb_free (mm_var);
1126 #endif
1127 }
1128 #endif
1129
1130 ft_font->advance_cache.clear ();
1131 ft_font->cached_serial = font->serial;
1132 }
1133
1134 /**
1135 * hb_ft_hb_font_changed:
1136 * @font: #hb_font_t to work upon
1137 *
1138 * Refreshes the state of the underlying FT_Face of @font when the hb_font_t
1139 * @font has changed.
1140 * This function should be called after changing the size or
1141 * variation-axis settings on the @font.
1142 * This call is fast if nothing has changed on @font.
1143 *
1144 * Return value: true if changed, false otherwise
1145 *
1146 * Since: 4.4.0
1147 **/
1148 hb_bool_t
1149 hb_ft_hb_font_changed (hb_font_t *font)
1150 {
1151 if (font->destroy != (hb_destroy_func_t) _hb_ft_font_destroy)
1152 return false;
1153
1154 hb_ft_font_t *ft_font = (hb_ft_font_t *) font->user_data;
1155
1156 return _hb_ft_hb_font_check_changed (font, ft_font);
1157 }
1158
1159 /**
1160 * hb_ft_font_create_referenced:
1161 * @ft_face: FT_Face to work upon
1162 *
1163 * Creates an #hb_font_t font object from the specified FT_Face.
1164 *
1165 * <note>Note: You must set the face size on @ft_face before calling
1166 * hb_ft_font_create_referenced() on it. HarfBuzz assumes size is always set
1167 * and will access `size` member of FT_Face unconditionally.</note>
1168 *
1169 * This is the preferred variant of the hb_ft_font_create*
1170 * function family, because it calls FT_Reference_Face() on @ft_face,
1171 * ensuring that @ft_face remains alive as long as the resulting
1172 * #hb_font_t font object remains alive.
1173 *
1174 * Use this version unless you know you have good reasons not to.
1175 *
1176 * Return value: (transfer full): the new #hb_font_t font object
1177 *
1178 * Since: 0.9.38
1179 **/
1180 hb_font_t *
1181 hb_ft_font_create_referenced (FT_Face ft_face)
1182 {
1183 FT_Reference_Face (ft_face);
1184 return hb_ft_font_create (ft_face, _hb_ft_face_destroy);
1185 }
1186
1187 static inline void free_static_ft_library ();
1188
1189 static struct hb_ft_library_lazy_loader_t : hb_lazy_loader_t<hb_remove_pointer<FT_Library>,
1190 hb_ft_library_lazy_loader_t>
1191 {
1192 static FT_Library create ()
1193 {
1194 FT_Library l;
1195 if (FT_Init_FreeType (&l))
1196 return nullptr;
1197
1198 hb_atexit (free_static_ft_library);
1199
1200 return l;
1201 }
1202 static void destroy (FT_Library l)
1203 {
1204 FT_Done_FreeType (l);
1205 }
1206 static FT_Library get_null ()
1207 {
1208 return nullptr;
1209 }
1210 } static_ft_library;
1211
1212 static inline
1213 void free_static_ft_library ()
1214 {
1215 static_ft_library.free_instance ();
1216 }
1217
1218 static FT_Library
1219 get_ft_library ()
1220 {
1221 return static_ft_library.get_unconst ();
1222 }
1223
1224 static void
1225 _release_blob (void *arg)
1226 {
1227 FT_Face ft_face = (FT_Face) arg;
1228 hb_blob_destroy ((hb_blob_t *) ft_face->generic.data);
1229 }
1230
1231 /**
1232 * hb_ft_font_set_funcs:
1233 * @font: #hb_font_t to work upon
1234 *
1235 * Configures the font-functions structure of the specified
1236 * #hb_font_t font object to use FreeType font functions.
1237 *
1238 * In particular, you can use this function to configure an
1239 * existing #hb_face_t face object for use with FreeType font
1240 * functions even if that #hb_face_t face object was initially
1241 * created with hb_face_create(), and therefore was not
1242 * initially configured to use FreeType font functions.
1243 *
1244 * An #hb_face_t face object created with hb_ft_face_create()
1245 * is preconfigured for FreeType font functions and does not
1246 * require this function to be used.
1247 *
1248 * <note>Note: Internally, this function creates an FT_Face.
1249 * </note>
1250 *
1251 * Since: 1.0.5
1252 **/
1253 void
1254 hb_ft_font_set_funcs (hb_font_t *font)
1255 {
1256 hb_blob_t *blob = hb_face_reference_blob (font->face);
1257 unsigned int blob_length;
1258 const char *blob_data = hb_blob_get_data (blob, &blob_length);
1259 if (unlikely (!blob_length))
1260 DEBUG_MSG (FT, font, "Font face has empty blob");
1261
1262 FT_Face ft_face = nullptr;
1263 FT_Error err = FT_New_Memory_Face (get_ft_library (),
1264 (const FT_Byte *) blob_data,
1265 blob_length,
1266 hb_face_get_index (font->face),
1267 &ft_face);
1268
1269 if (unlikely (err)) {
1270 hb_blob_destroy (blob);
1271 DEBUG_MSG (FT, font, "Font face FT_New_Memory_Face() failed");
1272 return;
1273 }
1274
1275 if (FT_Select_Charmap (ft_face, FT_ENCODING_MS_SYMBOL))
1276 FT_Select_Charmap (ft_face, FT_ENCODING_UNICODE);
1277
1278
1279 ft_face->generic.data = blob;
1280 ft_face->generic.finalizer = _release_blob;
1281
1282 _hb_ft_font_set_funcs (font, ft_face, true);
1283 hb_ft_font_set_load_flags (font, FT_LOAD_DEFAULT | FT_LOAD_NO_HINTING);
1284
1285 _hb_ft_hb_font_changed (font, ft_face);
1286 }
1287
1288
1289 #endif