1/*
2 * Copyright © 2007,2008,2009 Red Hat, Inc.
3 * Copyright © 2011,2012 Google, Inc.
4 *
5 * This is part of HarfBuzz, a text shaping library.
6 *
7 * Permission is hereby granted, without written agreement and without
8 * license or royalty fees, to use, copy, modify, and distribute this
9 * software and its documentation for any purpose, provided that the
10 * above copyright notice and the following two paragraphs appear in
11 * all copies of this software.
12 *
13 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
14 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
15 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
16 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
17 * DAMAGE.
18 *
19 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
20 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
21 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
22 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
23 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
24 *
25 * Red Hat Author(s): Behdad Esfahbod
26 * Google Author(s): Behdad Esfahbod
27 */
28
29#if !defined(HB_H_IN) && !defined(HB_NO_SINGLE_HEADER_ERROR)
30#error "Include <hb.h> instead."
31#endif
32
33#ifndef HB_COMMON_H
34#define HB_COMMON_H
35
36#ifndef HB_EXTERN
37#define HB_EXTERN extern
38#endif
39
40#ifndef HB_BEGIN_DECLS
41# ifdef __cplusplus
42# define HB_BEGIN_DECLS extern "C" {
43# define HB_END_DECLS }
44# else /* !__cplusplus */
45# define HB_BEGIN_DECLS
46# define HB_END_DECLS
47# endif /* !__cplusplus */
48#endif
49
50#if defined (_SVR4) || defined (SVR4) || defined (__OpenBSD__) || \
51 defined (_sgi) || defined (__sun) || defined (sun) || \
52 defined (__digital__) || defined (__HP_cc)
53# include <inttypes.h>
54#elif defined (_AIX)
55# include <sys/inttypes.h>
56#elif defined (_MSC_VER) && _MSC_VER < 1600
57/* VS 2010 (_MSC_VER 1600) has stdint.h */
58typedef __int8 int8_t;
59typedef unsigned __int8 uint8_t;
60typedef __int16 int16_t;
61typedef unsigned __int16 uint16_t;
62typedef __int32 int32_t;
63typedef unsigned __int32 uint32_t;
64typedef __int64 int64_t;
65typedef unsigned __int64 uint64_t;
66#elif defined (__KERNEL__)
67# include <linux/types.h>
68#else
69# include <stdint.h>
70#endif
71
72#if defined(__GNUC__) && ((__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1))
73#define HB_DEPRECATED __attribute__((__deprecated__))
74#elif defined(_MSC_VER) && (_MSC_VER >= 1300)
75#define HB_DEPRECATED __declspec(deprecated)
76#else
77#define HB_DEPRECATED
78#endif
79
80#if defined(__GNUC__) && ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5))
81#define HB_DEPRECATED_FOR(f) __attribute__((__deprecated__("Use '" #f "' instead")))
82#elif defined(_MSC_FULL_VER) && (_MSC_FULL_VER > 140050320)
83#define HB_DEPRECATED_FOR(f) __declspec(deprecated("is deprecated. Use '" #f "' instead"))
84#else
85#define HB_DEPRECATED_FOR(f) HB_DEPRECATED
86#endif
87
88
89HB_BEGIN_DECLS
90
91/**
92 * hb_bool_t:
93 *
94 * Data type for booleans.
95 *
96 **/
97typedef int hb_bool_t;
98
99/**
100 * hb_codepoint_t:
101 *
102 * Data type for holding Unicode codepoints. Also
103 * used to hold glyph IDs.
104 *
105 **/
106typedef uint32_t hb_codepoint_t;
107
108/**
109 * HB_CODEPOINT_INVALID:
110 *
111 * Unused #hb_codepoint_t value.
112 *
113 * Since: 8.0.0
114 */
115#define HB_CODEPOINT_INVALID ((hb_codepoint_t) -1)
116
117/**
118 * hb_position_t:
119 *
120 * Data type for holding a single coordinate value.
121 * Contour points and other multi-dimensional data are
122 * stored as tuples of #hb_position_t's.
123 *
124 **/
125typedef int32_t hb_position_t;
126/**
127 * hb_mask_t:
128 *
129 * Data type for bitmasks.
130 *
131 **/
132typedef uint32_t hb_mask_t;
133
134typedef union _hb_var_int_t {
135 uint32_t u32;
136 int32_t i32;
137 uint16_t u16[2];
138 int16_t i16[2];
139 uint8_t u8[4];
140 int8_t i8[4];
141} hb_var_int_t;
142
143typedef union _hb_var_num_t {
144 float f;
145 uint32_t u32;
146 int32_t i32;
147 uint16_t u16[2];
148 int16_t i16[2];
149 uint8_t u8[4];
150 int8_t i8[4];
151} hb_var_num_t;
152
153
154/* hb_tag_t */
155
156/**
157 * hb_tag_t:
158 *
159 * Data type for tag identifiers. Tags are four
160 * byte integers, each byte representing a character.
161 *
162 * Tags are used to identify tables, design-variation axes,
163 * scripts, languages, font features, and baselines with
164 * human-readable names.
165 *
166 **/
167typedef uint32_t hb_tag_t;
168
169/**
170 * HB_TAG:
171 * @c1: 1st character of the tag
172 * @c2: 2nd character of the tag
173 * @c3: 3rd character of the tag
174 * @c4: 4th character of the tag
175 *
176 * Constructs an #hb_tag_t from four character literals.
177 *
178 **/
179#define HB_TAG(c1,c2,c3,c4) ((hb_tag_t)((((uint32_t)(c1)&0xFF)<<24)|(((uint32_t)(c2)&0xFF)<<16)|(((uint32_t)(c3)&0xFF)<<8)|((uint32_t)(c4)&0xFF)))
180
181/**
182 * HB_UNTAG:
183 * @tag: an #hb_tag_t
184 *
185 * Extracts four character literals from an #hb_tag_t.
186 *
187 * Since: 0.6.0
188 *
189 **/
190#define HB_UNTAG(tag) (uint8_t)(((tag)>>24)&0xFF), (uint8_t)(((tag)>>16)&0xFF), (uint8_t)(((tag)>>8)&0xFF), (uint8_t)((tag)&0xFF)
191
192/**
193 * HB_TAG_NONE:
194 *
195 * Unset #hb_tag_t.
196 */
197#define HB_TAG_NONE HB_TAG(0,0,0,0)
198/**
199 * HB_TAG_MAX:
200 *
201 * Maximum possible unsigned #hb_tag_t.
202 *
203 * Since: 0.9.26
204 */
205#define HB_TAG_MAX HB_TAG(0xff,0xff,0xff,0xff)
206/**
207 * HB_TAG_MAX_SIGNED:
208 *
209 * Maximum possible signed #hb_tag_t.
210 *
211 * Since: 0.9.33
212 */
213#define HB_TAG_MAX_SIGNED HB_TAG(0x7f,0xff,0xff,0xff)
214
215/* len=-1 means str is NUL-terminated. */
216HB_EXTERN hb_tag_t
217hb_tag_from_string (const char *str, int len);
218
219/* buf should have 4 bytes. */
220HB_EXTERN void
221hb_tag_to_string (hb_tag_t tag, char *buf);
222
223
224/**
225 * hb_direction_t:
226 * @HB_DIRECTION_INVALID: Initial, unset direction.
227 * @HB_DIRECTION_LTR: Text is set horizontally from left to right.
228 * @HB_DIRECTION_RTL: Text is set horizontally from right to left.
229 * @HB_DIRECTION_TTB: Text is set vertically from top to bottom.
230 * @HB_DIRECTION_BTT: Text is set vertically from bottom to top.
231 *
232 * The direction of a text segment or buffer.
233 *
234 * A segment can also be tested for horizontal or vertical
235 * orientation (irrespective of specific direction) with
236 * HB_DIRECTION_IS_HORIZONTAL() or HB_DIRECTION_IS_VERTICAL().
237 *
238 */
239typedef enum {
240 HB_DIRECTION_INVALID = 0,
241 HB_DIRECTION_LTR = 4,
242 HB_DIRECTION_RTL,
243 HB_DIRECTION_TTB,
244 HB_DIRECTION_BTT
245} hb_direction_t;
246
247/* len=-1 means str is NUL-terminated */
248HB_EXTERN hb_direction_t
249hb_direction_from_string (const char *str, int len);
250
251HB_EXTERN const char *
252hb_direction_to_string (hb_direction_t direction);
253
254/**
255 * HB_DIRECTION_IS_VALID:
256 * @dir: #hb_direction_t to test
257 *
258 * Tests whether a text direction is valid.
259 *
260 **/
261#define HB_DIRECTION_IS_VALID(dir) ((((unsigned int) (dir)) & ~3U) == 4)
262/* Direction must be valid for the following */
263/**
264 * HB_DIRECTION_IS_HORIZONTAL:
265 * @dir: #hb_direction_t to test
266 *
267 * Tests whether a text direction is horizontal. Requires
268 * that the direction be valid.
269 *
270 **/
271#define HB_DIRECTION_IS_HORIZONTAL(dir) ((((unsigned int) (dir)) & ~1U) == 4)
272/**
273 * HB_DIRECTION_IS_VERTICAL:
274 * @dir: #hb_direction_t to test
275 *
276 * Tests whether a text direction is vertical. Requires
277 * that the direction be valid.
278 *
279 **/
280#define HB_DIRECTION_IS_VERTICAL(dir) ((((unsigned int) (dir)) & ~1U) == 6)
281/**
282 * HB_DIRECTION_IS_FORWARD:
283 * @dir: #hb_direction_t to test
284 *
285 * Tests whether a text direction moves forward (from left to right, or from
286 * top to bottom). Requires that the direction be valid.
287 *
288 **/
289#define HB_DIRECTION_IS_FORWARD(dir) ((((unsigned int) (dir)) & ~2U) == 4)
290/**
291 * HB_DIRECTION_IS_BACKWARD:
292 * @dir: #hb_direction_t to test
293 *
294 * Tests whether a text direction moves backward (from right to left, or from
295 * bottom to top). Requires that the direction be valid.
296 *
297 **/
298#define HB_DIRECTION_IS_BACKWARD(dir) ((((unsigned int) (dir)) & ~2U) == 5)
299/**
300 * HB_DIRECTION_REVERSE:
301 * @dir: #hb_direction_t to reverse
302 *
303 * Reverses a text direction. Requires that the direction
304 * be valid.
305 *
306 **/
307#define HB_DIRECTION_REVERSE(dir) ((hb_direction_t) (((unsigned int) (dir)) ^ 1))
308
309
310/* hb_language_t */
311
312/**
313 * hb_language_t:
314 *
315 * Data type for languages. Each #hb_language_t corresponds to a BCP 47
316 * language tag.
317 *
318 */
319typedef const struct hb_language_impl_t *hb_language_t;
320
321HB_EXTERN hb_language_t
322hb_language_from_string (const char *str, int len);
323
324HB_EXTERN const char *
325hb_language_to_string (hb_language_t language);
326
327/**
328 * HB_LANGUAGE_INVALID:
329 *
330 * An unset #hb_language_t.
331 *
332 * Since: 0.6.0
333 */
334#define HB_LANGUAGE_INVALID ((hb_language_t) 0)
335
336HB_EXTERN hb_language_t
337hb_language_get_default (void);
338
339HB_EXTERN hb_bool_t
340hb_language_matches (hb_language_t language,
341 hb_language_t specific);
342
343/**
344 * hb_script_t:
345 * @HB_SCRIPT_COMMON: `Zyyy`
346 * @HB_SCRIPT_INHERITED: `Zinh`
347 * @HB_SCRIPT_UNKNOWN: `Zzzz`
348 * @HB_SCRIPT_ARABIC: `Arab`
349 * @HB_SCRIPT_ARMENIAN: `Armn`
350 * @HB_SCRIPT_BENGALI: `Beng`
351 * @HB_SCRIPT_CYRILLIC: `Cyrl`
352 * @HB_SCRIPT_DEVANAGARI: `Deva`
353 * @HB_SCRIPT_GEORGIAN: `Geor`
354 * @HB_SCRIPT_GREEK: `Grek`
355 * @HB_SCRIPT_GUJARATI: `Gujr`
356 * @HB_SCRIPT_GURMUKHI: `Guru`
357 * @HB_SCRIPT_HANGUL: `Hang`
358 * @HB_SCRIPT_HAN: `Hani`
359 * @HB_SCRIPT_HEBREW: `Hebr`
360 * @HB_SCRIPT_HIRAGANA: `Hira`
361 * @HB_SCRIPT_KANNADA: `Knda`
362 * @HB_SCRIPT_KATAKANA: `Kana`
363 * @HB_SCRIPT_LAO: `Laoo`
364 * @HB_SCRIPT_LATIN: `Latn`
365 * @HB_SCRIPT_MALAYALAM: `Mlym`
366 * @HB_SCRIPT_ORIYA: `Orya`
367 * @HB_SCRIPT_TAMIL: `Taml`
368 * @HB_SCRIPT_TELUGU: `Telu`
369 * @HB_SCRIPT_THAI: `Thai`
370 * @HB_SCRIPT_TIBETAN: `Tibt`
371 * @HB_SCRIPT_BOPOMOFO: `Bopo`
372 * @HB_SCRIPT_BRAILLE: `Brai`
373 * @HB_SCRIPT_CANADIAN_SYLLABICS: `Cans`
374 * @HB_SCRIPT_CHEROKEE: `Cher`
375 * @HB_SCRIPT_ETHIOPIC: `Ethi`
376 * @HB_SCRIPT_KHMER: `Khmr`
377 * @HB_SCRIPT_MONGOLIAN: `Mong`
378 * @HB_SCRIPT_MYANMAR: `Mymr`
379 * @HB_SCRIPT_OGHAM: `Ogam`
380 * @HB_SCRIPT_RUNIC: `Runr`
381 * @HB_SCRIPT_SINHALA: `Sinh`
382 * @HB_SCRIPT_SYRIAC: `Syrc`
383 * @HB_SCRIPT_THAANA: `Thaa`
384 * @HB_SCRIPT_YI: `Yiii`
385 * @HB_SCRIPT_DESERET: `Dsrt`
386 * @HB_SCRIPT_GOTHIC: `Goth`
387 * @HB_SCRIPT_OLD_ITALIC: `Ital`
388 * @HB_SCRIPT_BUHID: `Buhd`
389 * @HB_SCRIPT_HANUNOO: `Hano`
390 * @HB_SCRIPT_TAGALOG: `Tglg`
391 * @HB_SCRIPT_TAGBANWA: `Tagb`
392 * @HB_SCRIPT_CYPRIOT: `Cprt`
393 * @HB_SCRIPT_LIMBU: `Limb`
394 * @HB_SCRIPT_LINEAR_B: `Linb`
395 * @HB_SCRIPT_OSMANYA: `Osma`
396 * @HB_SCRIPT_SHAVIAN: `Shaw`
397 * @HB_SCRIPT_TAI_LE: `Tale`
398 * @HB_SCRIPT_UGARITIC: `Ugar`
399 * @HB_SCRIPT_BUGINESE: `Bugi`
400 * @HB_SCRIPT_COPTIC: `Copt`
401 * @HB_SCRIPT_GLAGOLITIC: `Glag`
402 * @HB_SCRIPT_KHAROSHTHI: `Khar`
403 * @HB_SCRIPT_NEW_TAI_LUE: `Talu`
404 * @HB_SCRIPT_OLD_PERSIAN: `Xpeo`
405 * @HB_SCRIPT_SYLOTI_NAGRI: `Sylo`
406 * @HB_SCRIPT_TIFINAGH: `Tfng`
407 * @HB_SCRIPT_BALINESE: `Bali`
408 * @HB_SCRIPT_CUNEIFORM: `Xsux`
409 * @HB_SCRIPT_NKO: `Nkoo`
410 * @HB_SCRIPT_PHAGS_PA: `Phag`
411 * @HB_SCRIPT_PHOENICIAN: `Phnx`
412 * @HB_SCRIPT_CARIAN: `Cari`
413 * @HB_SCRIPT_CHAM: `Cham`
414 * @HB_SCRIPT_KAYAH_LI: `Kali`
415 * @HB_SCRIPT_LEPCHA: `Lepc`
416 * @HB_SCRIPT_LYCIAN: `Lyci`
417 * @HB_SCRIPT_LYDIAN: `Lydi`
418 * @HB_SCRIPT_OL_CHIKI: `Olck`
419 * @HB_SCRIPT_REJANG: `Rjng`
420 * @HB_SCRIPT_SAURASHTRA: `Saur`
421 * @HB_SCRIPT_SUNDANESE: `Sund`
422 * @HB_SCRIPT_VAI: `Vaii`
423 * @HB_SCRIPT_AVESTAN: `Avst`
424 * @HB_SCRIPT_BAMUM: `Bamu`
425 * @HB_SCRIPT_EGYPTIAN_HIEROGLYPHS: `Egyp`
426 * @HB_SCRIPT_IMPERIAL_ARAMAIC: `Armi`
427 * @HB_SCRIPT_INSCRIPTIONAL_PAHLAVI: `Phli`
428 * @HB_SCRIPT_INSCRIPTIONAL_PARTHIAN: `Prti`
429 * @HB_SCRIPT_JAVANESE: `Java`
430 * @HB_SCRIPT_KAITHI: `Kthi`
431 * @HB_SCRIPT_LISU: `Lisu`
432 * @HB_SCRIPT_MEETEI_MAYEK: `Mtei`
433 * @HB_SCRIPT_OLD_SOUTH_ARABIAN: `Sarb`
434 * @HB_SCRIPT_OLD_TURKIC: `Orkh`
435 * @HB_SCRIPT_SAMARITAN: `Samr`
436 * @HB_SCRIPT_TAI_THAM: `Lana`
437 * @HB_SCRIPT_TAI_VIET: `Tavt`
438 * @HB_SCRIPT_BATAK: `Batk`
439 * @HB_SCRIPT_BRAHMI: `Brah`
440 * @HB_SCRIPT_MANDAIC: `Mand`
441 * @HB_SCRIPT_CHAKMA: `Cakm`
442 * @HB_SCRIPT_MEROITIC_CURSIVE: `Merc`
443 * @HB_SCRIPT_MEROITIC_HIEROGLYPHS: `Mero`
444 * @HB_SCRIPT_MIAO: `Plrd`
445 * @HB_SCRIPT_SHARADA: `Shrd`
446 * @HB_SCRIPT_SORA_SOMPENG: `Sora`
447 * @HB_SCRIPT_TAKRI: `Takr`
448 * @HB_SCRIPT_BASSA_VAH: `Bass`, Since: 0.9.30
449 * @HB_SCRIPT_CAUCASIAN_ALBANIAN: `Aghb`, Since: 0.9.30
450 * @HB_SCRIPT_DUPLOYAN: `Dupl`, Since: 0.9.30
451 * @HB_SCRIPT_ELBASAN: `Elba`, Since: 0.9.30
452 * @HB_SCRIPT_GRANTHA: `Gran`, Since: 0.9.30
453 * @HB_SCRIPT_KHOJKI: `Khoj`, Since: 0.9.30
454 * @HB_SCRIPT_KHUDAWADI: `Sind`, Since: 0.9.30
455 * @HB_SCRIPT_LINEAR_A: `Lina`, Since: 0.9.30
456 * @HB_SCRIPT_MAHAJANI: `Mahj`, Since: 0.9.30
457 * @HB_SCRIPT_MANICHAEAN: `Mani`, Since: 0.9.30
458 * @HB_SCRIPT_MENDE_KIKAKUI: `Mend`, Since: 0.9.30
459 * @HB_SCRIPT_MODI: `Modi`, Since: 0.9.30
460 * @HB_SCRIPT_MRO: `Mroo`, Since: 0.9.30
461 * @HB_SCRIPT_NABATAEAN: `Nbat`, Since: 0.9.30
462 * @HB_SCRIPT_OLD_NORTH_ARABIAN: `Narb`, Since: 0.9.30
463 * @HB_SCRIPT_OLD_PERMIC: `Perm`, Since: 0.9.30
464 * @HB_SCRIPT_PAHAWH_HMONG: `Hmng`, Since: 0.9.30
465 * @HB_SCRIPT_PALMYRENE: `Palm`, Since: 0.9.30
466 * @HB_SCRIPT_PAU_CIN_HAU: `Pauc`, Since: 0.9.30
467 * @HB_SCRIPT_PSALTER_PAHLAVI: `Phlp`, Since: 0.9.30
468 * @HB_SCRIPT_SIDDHAM: `Sidd`, Since: 0.9.30
469 * @HB_SCRIPT_TIRHUTA: `Tirh`, Since: 0.9.30
470 * @HB_SCRIPT_WARANG_CITI: `Wara`, Since: 0.9.30
471 * @HB_SCRIPT_AHOM: `Ahom`, Since: 0.9.30
472 * @HB_SCRIPT_ANATOLIAN_HIEROGLYPHS: `Hluw`, Since: 0.9.30
473 * @HB_SCRIPT_HATRAN: `Hatr`, Since: 0.9.30
474 * @HB_SCRIPT_MULTANI: `Mult`, Since: 0.9.30
475 * @HB_SCRIPT_OLD_HUNGARIAN: `Hung`, Since: 0.9.30
476 * @HB_SCRIPT_SIGNWRITING: `Sgnw`, Since: 0.9.30
477 * @HB_SCRIPT_ADLAM: `Adlm`, Since: 1.3.0
478 * @HB_SCRIPT_BHAIKSUKI: `Bhks`, Since: 1.3.0
479 * @HB_SCRIPT_MARCHEN: `Marc`, Since: 1.3.0
480 * @HB_SCRIPT_OSAGE: `Osge`, Since: 1.3.0
481 * @HB_SCRIPT_TANGUT: `Tang`, Since: 1.3.0
482 * @HB_SCRIPT_NEWA: `Newa`, Since: 1.3.0
483 * @HB_SCRIPT_MASARAM_GONDI: `Gonm`, Since: 1.6.0
484 * @HB_SCRIPT_NUSHU: `Nshu`, Since: 1.6.0
485 * @HB_SCRIPT_SOYOMBO: `Soyo`, Since: 1.6.0
486 * @HB_SCRIPT_ZANABAZAR_SQUARE: `Zanb`, Since: 1.6.0
487 * @HB_SCRIPT_DOGRA: `Dogr`, Since: 1.8.0
488 * @HB_SCRIPT_GUNJALA_GONDI: `Gong`, Since: 1.8.0
489 * @HB_SCRIPT_HANIFI_ROHINGYA: `Rohg`, Since: 1.8.0
490 * @HB_SCRIPT_MAKASAR: `Maka`, Since: 1.8.0
491 * @HB_SCRIPT_MEDEFAIDRIN: `Medf`, Since: 1.8.0
492 * @HB_SCRIPT_OLD_SOGDIAN: `Sogo`, Since: 1.8.0
493 * @HB_SCRIPT_SOGDIAN: `Sogd`, Since: 1.8.0
494 * @HB_SCRIPT_ELYMAIC: `Elym`, Since: 2.4.0
495 * @HB_SCRIPT_NANDINAGARI: `Nand`, Since: 2.4.0
496 * @HB_SCRIPT_NYIAKENG_PUACHUE_HMONG: `Hmnp`, Since: 2.4.0
497 * @HB_SCRIPT_WANCHO: `Wcho`, Since: 2.4.0
498 * @HB_SCRIPT_CHORASMIAN: `Chrs`, Since: 2.6.7
499 * @HB_SCRIPT_DIVES_AKURU: `Diak`, Since: 2.6.7
500 * @HB_SCRIPT_KHITAN_SMALL_SCRIPT: `Kits`, Since: 2.6.7
501 * @HB_SCRIPT_YEZIDI: `Yezi`, Since: 2.6.7
502 * @HB_SCRIPT_CYPRO_MINOAN: `Cpmn`, Since: 3.0.0
503 * @HB_SCRIPT_OLD_UYGHUR: `Ougr`, Since: 3.0.0
504 * @HB_SCRIPT_TANGSA: `Tnsa`, Since: 3.0.0
505 * @HB_SCRIPT_TOTO: `Toto`, Since: 3.0.0
506 * @HB_SCRIPT_VITHKUQI: `Vith`, Since: 3.0.0
507 * @HB_SCRIPT_MATH: `Zmth`, Since: 3.4.0
508 * @HB_SCRIPT_KAWI: `Kawi`, Since: 5.2.0
509 * @HB_SCRIPT_NAG_MUNDARI: `Nagm`, Since: 5.2.0
510 * @HB_SCRIPT_INVALID: No script set
511 *
512 * Data type for scripts. Each #hb_script_t's value is an #hb_tag_t corresponding
513 * to the four-letter values defined by [ISO 15924](https://unicode.org/iso15924/).
514 *
515 * See also the Script (sc) property of the Unicode Character Database.
516 *
517 **/
518
519/* https://docs.google.com/spreadsheets/d/1Y90M0Ie3MUJ6UVCRDOypOtijlMDLNNyyLk36T6iMu0o */
520typedef enum
521{
522 HB_SCRIPT_COMMON = HB_TAG ('Z','y','y','y'), /*1.1*/
523 HB_SCRIPT_INHERITED = HB_TAG ('Z','i','n','h'), /*1.1*/
524 HB_SCRIPT_UNKNOWN = HB_TAG ('Z','z','z','z'), /*5.0*/
525
526 HB_SCRIPT_ARABIC = HB_TAG ('A','r','a','b'), /*1.1*/
527 HB_SCRIPT_ARMENIAN = HB_TAG ('A','r','m','n'), /*1.1*/
528 HB_SCRIPT_BENGALI = HB_TAG ('B','e','n','g'), /*1.1*/
529 HB_SCRIPT_CYRILLIC = HB_TAG ('C','y','r','l'), /*1.1*/
530 HB_SCRIPT_DEVANAGARI = HB_TAG ('D','e','v','a'), /*1.1*/
531 HB_SCRIPT_GEORGIAN = HB_TAG ('G','e','o','r'), /*1.1*/
532 HB_SCRIPT_GREEK = HB_TAG ('G','r','e','k'), /*1.1*/
533 HB_SCRIPT_GUJARATI = HB_TAG ('G','u','j','r'), /*1.1*/
534 HB_SCRIPT_GURMUKHI = HB_TAG ('G','u','r','u'), /*1.1*/
535 HB_SCRIPT_HANGUL = HB_TAG ('H','a','n','g'), /*1.1*/
536 HB_SCRIPT_HAN = HB_TAG ('H','a','n','i'), /*1.1*/
537 HB_SCRIPT_HEBREW = HB_TAG ('H','e','b','r'), /*1.1*/
538 HB_SCRIPT_HIRAGANA = HB_TAG ('H','i','r','a'), /*1.1*/
539 HB_SCRIPT_KANNADA = HB_TAG ('K','n','d','a'), /*1.1*/
540 HB_SCRIPT_KATAKANA = HB_TAG ('K','a','n','a'), /*1.1*/
541 HB_SCRIPT_LAO = HB_TAG ('L','a','o','o'), /*1.1*/
542 HB_SCRIPT_LATIN = HB_TAG ('L','a','t','n'), /*1.1*/
543 HB_SCRIPT_MALAYALAM = HB_TAG ('M','l','y','m'), /*1.1*/
544 HB_SCRIPT_ORIYA = HB_TAG ('O','r','y','a'), /*1.1*/
545 HB_SCRIPT_TAMIL = HB_TAG ('T','a','m','l'), /*1.1*/
546 HB_SCRIPT_TELUGU = HB_TAG ('T','e','l','u'), /*1.1*/
547 HB_SCRIPT_THAI = HB_TAG ('T','h','a','i'), /*1.1*/
548
549 HB_SCRIPT_TIBETAN = HB_TAG ('T','i','b','t'), /*2.0*/
550
551 HB_SCRIPT_BOPOMOFO = HB_TAG ('B','o','p','o'), /*3.0*/
552 HB_SCRIPT_BRAILLE = HB_TAG ('B','r','a','i'), /*3.0*/
553 HB_SCRIPT_CANADIAN_SYLLABICS = HB_TAG ('C','a','n','s'), /*3.0*/
554 HB_SCRIPT_CHEROKEE = HB_TAG ('C','h','e','r'), /*3.0*/
555 HB_SCRIPT_ETHIOPIC = HB_TAG ('E','t','h','i'), /*3.0*/
556 HB_SCRIPT_KHMER = HB_TAG ('K','h','m','r'), /*3.0*/
557 HB_SCRIPT_MONGOLIAN = HB_TAG ('M','o','n','g'), /*3.0*/
558 HB_SCRIPT_MYANMAR = HB_TAG ('M','y','m','r'), /*3.0*/
559 HB_SCRIPT_OGHAM = HB_TAG ('O','g','a','m'), /*3.0*/
560 HB_SCRIPT_RUNIC = HB_TAG ('R','u','n','r'), /*3.0*/
561 HB_SCRIPT_SINHALA = HB_TAG ('S','i','n','h'), /*3.0*/
562 HB_SCRIPT_SYRIAC = HB_TAG ('S','y','r','c'), /*3.0*/
563 HB_SCRIPT_THAANA = HB_TAG ('T','h','a','a'), /*3.0*/
564 HB_SCRIPT_YI = HB_TAG ('Y','i','i','i'), /*3.0*/
565
566 HB_SCRIPT_DESERET = HB_TAG ('D','s','r','t'), /*3.1*/
567 HB_SCRIPT_GOTHIC = HB_TAG ('G','o','t','h'), /*3.1*/
568 HB_SCRIPT_OLD_ITALIC = HB_TAG ('I','t','a','l'), /*3.1*/
569
570 HB_SCRIPT_BUHID = HB_TAG ('B','u','h','d'), /*3.2*/
571 HB_SCRIPT_HANUNOO = HB_TAG ('H','a','n','o'), /*3.2*/
572 HB_SCRIPT_TAGALOG = HB_TAG ('T','g','l','g'), /*3.2*/
573 HB_SCRIPT_TAGBANWA = HB_TAG ('T','a','g','b'), /*3.2*/
574
575 HB_SCRIPT_CYPRIOT = HB_TAG ('C','p','r','t'), /*4.0*/
576 HB_SCRIPT_LIMBU = HB_TAG ('L','i','m','b'), /*4.0*/
577 HB_SCRIPT_LINEAR_B = HB_TAG ('L','i','n','b'), /*4.0*/
578 HB_SCRIPT_OSMANYA = HB_TAG ('O','s','m','a'), /*4.0*/
579 HB_SCRIPT_SHAVIAN = HB_TAG ('S','h','a','w'), /*4.0*/
580 HB_SCRIPT_TAI_LE = HB_TAG ('T','a','l','e'), /*4.0*/
581 HB_SCRIPT_UGARITIC = HB_TAG ('U','g','a','r'), /*4.0*/
582
583 HB_SCRIPT_BUGINESE = HB_TAG ('B','u','g','i'), /*4.1*/
584 HB_SCRIPT_COPTIC = HB_TAG ('C','o','p','t'), /*4.1*/
585 HB_SCRIPT_GLAGOLITIC = HB_TAG ('G','l','a','g'), /*4.1*/
586 HB_SCRIPT_KHAROSHTHI = HB_TAG ('K','h','a','r'), /*4.1*/
587 HB_SCRIPT_NEW_TAI_LUE = HB_TAG ('T','a','l','u'), /*4.1*/
588 HB_SCRIPT_OLD_PERSIAN = HB_TAG ('X','p','e','o'), /*4.1*/
589 HB_SCRIPT_SYLOTI_NAGRI = HB_TAG ('S','y','l','o'), /*4.1*/
590 HB_SCRIPT_TIFINAGH = HB_TAG ('T','f','n','g'), /*4.1*/
591
592 HB_SCRIPT_BALINESE = HB_TAG ('B','a','l','i'), /*5.0*/
593 HB_SCRIPT_CUNEIFORM = HB_TAG ('X','s','u','x'), /*5.0*/
594 HB_SCRIPT_NKO = HB_TAG ('N','k','o','o'), /*5.0*/
595 HB_SCRIPT_PHAGS_PA = HB_TAG ('P','h','a','g'), /*5.0*/
596 HB_SCRIPT_PHOENICIAN = HB_TAG ('P','h','n','x'), /*5.0*/
597
598 HB_SCRIPT_CARIAN = HB_TAG ('C','a','r','i'), /*5.1*/
599 HB_SCRIPT_CHAM = HB_TAG ('C','h','a','m'), /*5.1*/
600 HB_SCRIPT_KAYAH_LI = HB_TAG ('K','a','l','i'), /*5.1*/
601 HB_SCRIPT_LEPCHA = HB_TAG ('L','e','p','c'), /*5.1*/
602 HB_SCRIPT_LYCIAN = HB_TAG ('L','y','c','i'), /*5.1*/
603 HB_SCRIPT_LYDIAN = HB_TAG ('L','y','d','i'), /*5.1*/
604 HB_SCRIPT_OL_CHIKI = HB_TAG ('O','l','c','k'), /*5.1*/
605 HB_SCRIPT_REJANG = HB_TAG ('R','j','n','g'), /*5.1*/
606 HB_SCRIPT_SAURASHTRA = HB_TAG ('S','a','u','r'), /*5.1*/
607 HB_SCRIPT_SUNDANESE = HB_TAG ('S','u','n','d'), /*5.1*/
608 HB_SCRIPT_VAI = HB_TAG ('V','a','i','i'), /*5.1*/
609
610 HB_SCRIPT_AVESTAN = HB_TAG ('A','v','s','t'), /*5.2*/
611 HB_SCRIPT_BAMUM = HB_TAG ('B','a','m','u'), /*5.2*/
612 HB_SCRIPT_EGYPTIAN_HIEROGLYPHS = HB_TAG ('E','g','y','p'), /*5.2*/
613 HB_SCRIPT_IMPERIAL_ARAMAIC = HB_TAG ('A','r','m','i'), /*5.2*/
614 HB_SCRIPT_INSCRIPTIONAL_PAHLAVI = HB_TAG ('P','h','l','i'), /*5.2*/
615 HB_SCRIPT_INSCRIPTIONAL_PARTHIAN = HB_TAG ('P','r','t','i'), /*5.2*/
616 HB_SCRIPT_JAVANESE = HB_TAG ('J','a','v','a'), /*5.2*/
617 HB_SCRIPT_KAITHI = HB_TAG ('K','t','h','i'), /*5.2*/
618 HB_SCRIPT_LISU = HB_TAG ('L','i','s','u'), /*5.2*/
619 HB_SCRIPT_MEETEI_MAYEK = HB_TAG ('M','t','e','i'), /*5.2*/
620 HB_SCRIPT_OLD_SOUTH_ARABIAN = HB_TAG ('S','a','r','b'), /*5.2*/
621 HB_SCRIPT_OLD_TURKIC = HB_TAG ('O','r','k','h'), /*5.2*/
622 HB_SCRIPT_SAMARITAN = HB_TAG ('S','a','m','r'), /*5.2*/
623 HB_SCRIPT_TAI_THAM = HB_TAG ('L','a','n','a'), /*5.2*/
624 HB_SCRIPT_TAI_VIET = HB_TAG ('T','a','v','t'), /*5.2*/
625
626 HB_SCRIPT_BATAK = HB_TAG ('B','a','t','k'), /*6.0*/
627 HB_SCRIPT_BRAHMI = HB_TAG ('B','r','a','h'), /*6.0*/
628 HB_SCRIPT_MANDAIC = HB_TAG ('M','a','n','d'), /*6.0*/
629
630 HB_SCRIPT_CHAKMA = HB_TAG ('C','a','k','m'), /*6.1*/
631 HB_SCRIPT_MEROITIC_CURSIVE = HB_TAG ('M','e','r','c'), /*6.1*/
632 HB_SCRIPT_MEROITIC_HIEROGLYPHS = HB_TAG ('M','e','r','o'), /*6.1*/
633 HB_SCRIPT_MIAO = HB_TAG ('P','l','r','d'), /*6.1*/
634 HB_SCRIPT_SHARADA = HB_TAG ('S','h','r','d'), /*6.1*/
635 HB_SCRIPT_SORA_SOMPENG = HB_TAG ('S','o','r','a'), /*6.1*/
636 HB_SCRIPT_TAKRI = HB_TAG ('T','a','k','r'), /*6.1*/
637
638 /*
639 * Since: 0.9.30
640 */
641 HB_SCRIPT_BASSA_VAH = HB_TAG ('B','a','s','s'), /*7.0*/
642 HB_SCRIPT_CAUCASIAN_ALBANIAN = HB_TAG ('A','g','h','b'), /*7.0*/
643 HB_SCRIPT_DUPLOYAN = HB_TAG ('D','u','p','l'), /*7.0*/
644 HB_SCRIPT_ELBASAN = HB_TAG ('E','l','b','a'), /*7.0*/
645 HB_SCRIPT_GRANTHA = HB_TAG ('G','r','a','n'), /*7.0*/
646 HB_SCRIPT_KHOJKI = HB_TAG ('K','h','o','j'), /*7.0*/
647 HB_SCRIPT_KHUDAWADI = HB_TAG ('S','i','n','d'), /*7.0*/
648 HB_SCRIPT_LINEAR_A = HB_TAG ('L','i','n','a'), /*7.0*/
649 HB_SCRIPT_MAHAJANI = HB_TAG ('M','a','h','j'), /*7.0*/
650 HB_SCRIPT_MANICHAEAN = HB_TAG ('M','a','n','i'), /*7.0*/
651 HB_SCRIPT_MENDE_KIKAKUI = HB_TAG ('M','e','n','d'), /*7.0*/
652 HB_SCRIPT_MODI = HB_TAG ('M','o','d','i'), /*7.0*/
653 HB_SCRIPT_MRO = HB_TAG ('M','r','o','o'), /*7.0*/
654 HB_SCRIPT_NABATAEAN = HB_TAG ('N','b','a','t'), /*7.0*/
655 HB_SCRIPT_OLD_NORTH_ARABIAN = HB_TAG ('N','a','r','b'), /*7.0*/
656 HB_SCRIPT_OLD_PERMIC = HB_TAG ('P','e','r','m'), /*7.0*/
657 HB_SCRIPT_PAHAWH_HMONG = HB_TAG ('H','m','n','g'), /*7.0*/
658 HB_SCRIPT_PALMYRENE = HB_TAG ('P','a','l','m'), /*7.0*/
659 HB_SCRIPT_PAU_CIN_HAU = HB_TAG ('P','a','u','c'), /*7.0*/
660 HB_SCRIPT_PSALTER_PAHLAVI = HB_TAG ('P','h','l','p'), /*7.0*/
661 HB_SCRIPT_SIDDHAM = HB_TAG ('S','i','d','d'), /*7.0*/
662 HB_SCRIPT_TIRHUTA = HB_TAG ('T','i','r','h'), /*7.0*/
663 HB_SCRIPT_WARANG_CITI = HB_TAG ('W','a','r','a'), /*7.0*/
664
665 HB_SCRIPT_AHOM = HB_TAG ('A','h','o','m'), /*8.0*/
666 HB_SCRIPT_ANATOLIAN_HIEROGLYPHS = HB_TAG ('H','l','u','w'), /*8.0*/
667 HB_SCRIPT_HATRAN = HB_TAG ('H','a','t','r'), /*8.0*/
668 HB_SCRIPT_MULTANI = HB_TAG ('M','u','l','t'), /*8.0*/
669 HB_SCRIPT_OLD_HUNGARIAN = HB_TAG ('H','u','n','g'), /*8.0*/
670 HB_SCRIPT_SIGNWRITING = HB_TAG ('S','g','n','w'), /*8.0*/
671
672 /*
673 * Since 1.3.0
674 */
675 HB_SCRIPT_ADLAM = HB_TAG ('A','d','l','m'), /*9.0*/
676 HB_SCRIPT_BHAIKSUKI = HB_TAG ('B','h','k','s'), /*9.0*/
677 HB_SCRIPT_MARCHEN = HB_TAG ('M','a','r','c'), /*9.0*/
678 HB_SCRIPT_OSAGE = HB_TAG ('O','s','g','e'), /*9.0*/
679 HB_SCRIPT_TANGUT = HB_TAG ('T','a','n','g'), /*9.0*/
680 HB_SCRIPT_NEWA = HB_TAG ('N','e','w','a'), /*9.0*/
681
682 /*
683 * Since 1.6.0
684 */
685 HB_SCRIPT_MASARAM_GONDI = HB_TAG ('G','o','n','m'), /*10.0*/
686 HB_SCRIPT_NUSHU = HB_TAG ('N','s','h','u'), /*10.0*/
687 HB_SCRIPT_SOYOMBO = HB_TAG ('S','o','y','o'), /*10.0*/
688 HB_SCRIPT_ZANABAZAR_SQUARE = HB_TAG ('Z','a','n','b'), /*10.0*/
689
690 /*
691 * Since 1.8.0
692 */
693 HB_SCRIPT_DOGRA = HB_TAG ('D','o','g','r'), /*11.0*/
694 HB_SCRIPT_GUNJALA_GONDI = HB_TAG ('G','o','n','g'), /*11.0*/
695 HB_SCRIPT_HANIFI_ROHINGYA = HB_TAG ('R','o','h','g'), /*11.0*/
696 HB_SCRIPT_MAKASAR = HB_TAG ('M','a','k','a'), /*11.0*/
697 HB_SCRIPT_MEDEFAIDRIN = HB_TAG ('M','e','d','f'), /*11.0*/
698 HB_SCRIPT_OLD_SOGDIAN = HB_TAG ('S','o','g','o'), /*11.0*/
699 HB_SCRIPT_SOGDIAN = HB_TAG ('S','o','g','d'), /*11.0*/
700
701 /*
702 * Since 2.4.0
703 */
704 HB_SCRIPT_ELYMAIC = HB_TAG ('E','l','y','m'), /*12.0*/
705 HB_SCRIPT_NANDINAGARI = HB_TAG ('N','a','n','d'), /*12.0*/
706 HB_SCRIPT_NYIAKENG_PUACHUE_HMONG = HB_TAG ('H','m','n','p'), /*12.0*/
707 HB_SCRIPT_WANCHO = HB_TAG ('W','c','h','o'), /*12.0*/
708
709 /*
710 * Since 2.6.7
711 */
712 HB_SCRIPT_CHORASMIAN = HB_TAG ('C','h','r','s'), /*13.0*/
713 HB_SCRIPT_DIVES_AKURU = HB_TAG ('D','i','a','k'), /*13.0*/
714 HB_SCRIPT_KHITAN_SMALL_SCRIPT = HB_TAG ('K','i','t','s'), /*13.0*/
715 HB_SCRIPT_YEZIDI = HB_TAG ('Y','e','z','i'), /*13.0*/
716
717 /*
718 * Since 3.0.0
719 */
720 HB_SCRIPT_CYPRO_MINOAN = HB_TAG ('C','p','m','n'), /*14.0*/
721 HB_SCRIPT_OLD_UYGHUR = HB_TAG ('O','u','g','r'), /*14.0*/
722 HB_SCRIPT_TANGSA = HB_TAG ('T','n','s','a'), /*14.0*/
723 HB_SCRIPT_TOTO = HB_TAG ('T','o','t','o'), /*14.0*/
724 HB_SCRIPT_VITHKUQI = HB_TAG ('V','i','t','h'), /*14.0*/
725
726 /*
727 * Since 3.4.0
728 */
729 HB_SCRIPT_MATH = HB_TAG ('Z','m','t','h'),
730
731 /*
732 * Since 5.2.0
733 */
734 HB_SCRIPT_KAWI = HB_TAG ('K','a','w','i'), /*15.0*/
735 HB_SCRIPT_NAG_MUNDARI = HB_TAG ('N','a','g','m'), /*15.0*/
736
737 /* No script set. */
738 HB_SCRIPT_INVALID = HB_TAG_NONE,
739
740 /*< private >*/
741
742 /* Dummy values to ensure any hb_tag_t value can be passed/stored as hb_script_t
743 * without risking undefined behavior. We have two, for historical reasons.
744 * HB_TAG_MAX used to be unsigned, but that was invalid Ansi C, so was changed
745 * to _HB_SCRIPT_MAX_VALUE to be equal to HB_TAG_MAX_SIGNED as well.
746 *
747 * See this thread for technicalities:
748 *
749 * https://lists.freedesktop.org/archives/harfbuzz/2014-March/004150.html
750 */
751 _HB_SCRIPT_MAX_VALUE = HB_TAG_MAX_SIGNED, /*< skip >*/
752 _HB_SCRIPT_MAX_VALUE_SIGNED = HB_TAG_MAX_SIGNED /*< skip >*/
753
754} hb_script_t;
755
756
757/* Script functions */
758
759HB_EXTERN hb_script_t
760hb_script_from_iso15924_tag (hb_tag_t tag);
761
762HB_EXTERN hb_script_t
763hb_script_from_string (const char *str, int len);
764
765HB_EXTERN hb_tag_t
766hb_script_to_iso15924_tag (hb_script_t script);
767
768HB_EXTERN hb_direction_t
769hb_script_get_horizontal_direction (hb_script_t script);
770
771
772/* User data */
773
774/**
775 * hb_user_data_key_t:
776 *
777 * Data structure for holding user-data keys.
778 *
779 **/
780typedef struct hb_user_data_key_t {
781 /*< private >*/
782 char unused;
783} hb_user_data_key_t;
784
785/**
786 * hb_destroy_func_t:
787 * @user_data: the data to be destroyed
788 *
789 * A virtual method for destroy user-data callbacks.
790 *
791 */
792typedef void (*hb_destroy_func_t) (void *user_data);
793
794
795/* Font features and variations. */
796
797/**
798 * HB_FEATURE_GLOBAL_START:
799 *
800 * Special setting for #hb_feature_t.start to apply the feature from the start
801 * of the buffer.
802 *
803 * Since: 2.0.0
804 */
805#define HB_FEATURE_GLOBAL_START 0
806
807/**
808 * HB_FEATURE_GLOBAL_END:
809 *
810 * Special setting for #hb_feature_t.end to apply the feature from to the end
811 * of the buffer.
812 *
813 * Since: 2.0.0
814 */
815#define HB_FEATURE_GLOBAL_END ((unsigned int) -1)
816
817/**
818 * hb_feature_t:
819 * @tag: The #hb_tag_t tag of the feature
820 * @value: The value of the feature. 0 disables the feature, non-zero (usually
821 * 1) enables the feature. For features implemented as lookup type 3 (like
822 * 'salt') the @value is a one based index into the alternates.
823 * @start: the cluster to start applying this feature setting (inclusive).
824 * @end: the cluster to end applying this feature setting (exclusive).
825 *
826 * The #hb_feature_t is the structure that holds information about requested
827 * feature application. The feature will be applied with the given value to all
828 * glyphs which are in clusters between @start (inclusive) and @end (exclusive).
829 * Setting start to #HB_FEATURE_GLOBAL_START and end to #HB_FEATURE_GLOBAL_END
830 * specifies that the feature always applies to the entire buffer.
831 */
832typedef struct hb_feature_t {
833 hb_tag_t tag;
834 uint32_t value;
835 unsigned int start;
836 unsigned int end;
837} hb_feature_t;
838
839HB_EXTERN hb_bool_t
840hb_feature_from_string (const char *str, int len,
841 hb_feature_t *feature);
842
843HB_EXTERN void
844hb_feature_to_string (hb_feature_t *feature,
845 char *buf, unsigned int size);
846
847/**
848 * hb_variation_t:
849 * @tag: The #hb_tag_t tag of the variation-axis name
850 * @value: The value of the variation axis
851 *
852 * Data type for holding variation data. Registered OpenType
853 * variation-axis tags are listed in
854 * [OpenType Axis Tag Registry](https://docs.microsoft.com/en-us/typography/opentype/spec/dvaraxisreg).
855 *
856 * Since: 1.4.2
857 */
858typedef struct hb_variation_t {
859 hb_tag_t tag;
860 float value;
861} hb_variation_t;
862
863HB_EXTERN hb_bool_t
864hb_variation_from_string (const char *str, int len,
865 hb_variation_t *variation);
866
867HB_EXTERN void
868hb_variation_to_string (hb_variation_t *variation,
869 char *buf, unsigned int size);
870
871/**
872 * hb_color_t:
873 *
874 * Data type for holding color values. Colors are eight bits per
875 * channel RGB plus alpha transparency.
876 *
877 * Since: 2.1.0
878 */
879typedef uint32_t hb_color_t;
880
881/**
882 * HB_COLOR:
883 * @b: blue channel value
884 * @g: green channel value
885 * @r: red channel value
886 * @a: alpha channel value
887 *
888 * Constructs an #hb_color_t from four integers.
889 *
890 * Since: 2.1.0
891 */
892#define HB_COLOR(b,g,r,a) ((hb_color_t) HB_TAG ((b),(g),(r),(a)))
893
894HB_EXTERN uint8_t
895hb_color_get_alpha (hb_color_t color);
896#define hb_color_get_alpha(color) ((color) & 0xFF)
897
898HB_EXTERN uint8_t
899hb_color_get_red (hb_color_t color);
900#define hb_color_get_red(color) (((color) >> 8) & 0xFF)
901
902HB_EXTERN uint8_t
903hb_color_get_green (hb_color_t color);
904#define hb_color_get_green(color) (((color) >> 16) & 0xFF)
905
906HB_EXTERN uint8_t
907hb_color_get_blue (hb_color_t color);
908#define hb_color_get_blue(color) (((color) >> 24) & 0xFF)
909
910/**
911 * hb_glyph_extents_t:
912 * @x_bearing: Distance from the x-origin to the left extremum of the glyph.
913 * @y_bearing: Distance from the top extremum of the glyph to the y-origin.
914 * @width: Distance from the left extremum of the glyph to the right extremum.
915 * @height: Distance from the top extremum of the glyph to the bottom extremum.
916 *
917 * Glyph extent values, measured in font units.
918 *
919 * Note that @height is negative, in coordinate systems that grow up.
920 **/
921typedef struct hb_glyph_extents_t {
922 hb_position_t x_bearing;
923 hb_position_t y_bearing;
924 hb_position_t width;
925 hb_position_t height;
926} hb_glyph_extents_t;
927
928/**
929 * hb_font_t:
930 *
931 * Data type for holding fonts.
932 *
933 */
934typedef struct hb_font_t hb_font_t;
935
936HB_END_DECLS
937
938#endif /* HB_COMMON_H */
939