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 (_AIX) 51 # include <sys/inttypes.h> 52 #elif defined (_MSC_VER) && _MSC_VER < 1600 53 /* VS 2010 (_MSC_VER 1600) has stdint.h */ 54 typedef __int8 int8_t; 55 typedef unsigned __int8 uint8_t; 56 typedef __int16 int16_t; 57 typedef unsigned __int16 uint16_t; 58 typedef __int32 int32_t; 59 typedef unsigned __int32 uint32_t; 60 typedef __int64 int64_t; 61 typedef unsigned __int64 uint64_t; 62 #elif defined (_MSC_VER) && _MSC_VER < 1800 63 /* VS 2013 (_MSC_VER 1800) has inttypes.h */ 64 # include <stdint.h> 65 #else 66 # include <inttypes.h> 67 #endif 68 69 #if defined(__GNUC__) && ((__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1)) 70 #define HB_DEPRECATED __attribute__((__deprecated__)) 71 #elif defined(_MSC_VER) && (_MSC_VER >= 1300) 72 #define HB_DEPRECATED __declspec(deprecated) 73 #else 74 #define HB_DEPRECATED 75 #endif 76 77 #if defined(__GNUC__) && ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)) 78 #define HB_DEPRECATED_FOR(f) __attribute__((__deprecated__("Use '" #f "' instead"))) 79 #elif defined(_MSC_FULL_VER) && (_MSC_FULL_VER > 140050320) 80 #define HB_DEPRECATED_FOR(f) __declspec(deprecated("is deprecated. Use '" #f "' instead")) 81 #else 82 #define HB_DEPRECATED_FOR(f) HB_DEPRECATED 83 #endif 84 85 86 HB_BEGIN_DECLS 87 88 /** 89 * hb_bool_t: 90 * 91 * Data type for booleans. 92 * 93 **/ 94 typedef int hb_bool_t; 95 96 /** 97 * hb_codepoint_t: 98 * 99 * Data type for holding Unicode codepoints. Also 100 * used to hold glyph IDs. 101 * 102 **/ 103 typedef uint32_t hb_codepoint_t; 104 105 /** 106 * HB_CODEPOINT_INVALID: 107 * 108 * Unused #hb_codepoint_t value. 109 * 110 * Since: 8.0.0 111 */ 112 #define HB_CODEPOINT_INVALID ((hb_codepoint_t) -1) 113 114 /** 115 * hb_position_t: 116 * 117 * Data type for holding a single coordinate value. 118 * Contour points and other multi-dimensional data are 119 * stored as tuples of #hb_position_t's. 120 * 121 **/ 122 typedef int32_t hb_position_t; 123 /** 124 * hb_mask_t: 125 * 126 * Data type for bitmasks. 127 * 128 **/ 129 typedef uint32_t hb_mask_t; 130 131 typedef union _hb_var_int_t { 132 uint32_t u32; 133 int32_t i32; 134 uint16_t u16[2]; 135 int16_t i16[2]; 136 uint8_t u8[4]; 137 int8_t i8[4]; 138 } hb_var_int_t; 139 140 typedef union _hb_var_num_t { 141 float f; 142 uint32_t u32; 143 int32_t i32; 144 uint16_t u16[2]; 145 int16_t i16[2]; 146 uint8_t u8[4]; 147 int8_t i8[4]; 148 } hb_var_num_t; 149 150 151 /* hb_tag_t */ 152 153 /** 154 * hb_tag_t: 155 * 156 * Data type for tag identifiers. Tags are four 157 * byte integers, each byte representing a character. 158 * 159 * Tags are used to identify tables, design-variation axes, 160 * scripts, languages, font features, and baselines with 161 * human-readable names. 162 * 163 **/ 164 typedef uint32_t hb_tag_t; 165 166 /** 167 * HB_TAG: 168 * @c1: 1st character of the tag 169 * @c2: 2nd character of the tag 170 * @c3: 3rd character of the tag 171 * @c4: 4th character of the tag 172 * 173 * Constructs an #hb_tag_t from four character literals. 174 * 175 **/ 176 #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))) 177 178 /** 179 * HB_UNTAG: 180 * @tag: an #hb_tag_t 181 * 182 * Extracts four character literals from an #hb_tag_t. 183 * 184 * Since: 0.6.0 185 * 186 **/ 187 #define HB_UNTAG(tag) (uint8_t)(((tag)>>24)&0xFF), (uint8_t)(((tag)>>16)&0xFF), (uint8_t)(((tag)>>8)&0xFF), (uint8_t)((tag)&0xFF) 188 189 /** 190 * HB_TAG_NONE: 191 * 192 * Unset #hb_tag_t. 193 */ 194 #define HB_TAG_NONE HB_TAG(0,0,0,0) 195 /** 196 * HB_TAG_MAX: 197 * 198 * Maximum possible unsigned #hb_tag_t. 199 * 200 * Since: 0.9.26 201 */ 202 #define HB_TAG_MAX HB_TAG(0xff,0xff,0xff,0xff) 203 /** 204 * HB_TAG_MAX_SIGNED: 205 * 206 * Maximum possible signed #hb_tag_t. 207 * 208 * Since: 0.9.33 209 */ 210 #define HB_TAG_MAX_SIGNED HB_TAG(0x7f,0xff,0xff,0xff) 211 212 /* len=-1 means str is NUL-terminated. */ 213 HB_EXTERN hb_tag_t 214 hb_tag_from_string (const char *str, int len); 215 216 /* buf should have 4 bytes. */ 217 HB_EXTERN void 218 hb_tag_to_string (hb_tag_t tag, char *buf); 219 220 221 /** 222 * hb_direction_t: 223 * @HB_DIRECTION_INVALID: Initial, unset direction. 224 * @HB_DIRECTION_LTR: Text is set horizontally from left to right. 225 * @HB_DIRECTION_RTL: Text is set horizontally from right to left. 226 * @HB_DIRECTION_TTB: Text is set vertically from top to bottom. 227 * @HB_DIRECTION_BTT: Text is set vertically from bottom to top. 228 * 229 * The direction of a text segment or buffer. 230 * 231 * A segment can also be tested for horizontal or vertical 232 * orientation (irrespective of specific direction) with 233 * HB_DIRECTION_IS_HORIZONTAL() or HB_DIRECTION_IS_VERTICAL(). 234 * 235 */ 236 typedef enum { 237 HB_DIRECTION_INVALID = 0, 238 HB_DIRECTION_LTR = 4, 239 HB_DIRECTION_RTL, 240 HB_DIRECTION_TTB, 241 HB_DIRECTION_BTT 242 } hb_direction_t; 243 244 /* len=-1 means str is NUL-terminated */ 245 HB_EXTERN hb_direction_t 246 hb_direction_from_string (const char *str, int len); 247 248 HB_EXTERN const char * 249 hb_direction_to_string (hb_direction_t direction); 250 251 /** 252 * HB_DIRECTION_IS_VALID: 253 * @dir: #hb_direction_t to test 254 * 255 * Tests whether a text direction is valid. 256 * 257 **/ 258 #define HB_DIRECTION_IS_VALID(dir) ((((unsigned int) (dir)) & ~3U) == 4) 259 /* Direction must be valid for the following */ 260 /** 261 * HB_DIRECTION_IS_HORIZONTAL: 262 * @dir: #hb_direction_t to test 263 * 264 * Tests whether a text direction is horizontal. Requires 265 * that the direction be valid. 266 * 267 **/ 268 #define HB_DIRECTION_IS_HORIZONTAL(dir) ((((unsigned int) (dir)) & ~1U) == 4) 269 /** 270 * HB_DIRECTION_IS_VERTICAL: 271 * @dir: #hb_direction_t to test 272 * 273 * Tests whether a text direction is vertical. Requires 274 * that the direction be valid. 275 * 276 **/ 277 #define HB_DIRECTION_IS_VERTICAL(dir) ((((unsigned int) (dir)) & ~1U) == 6) 278 /** 279 * HB_DIRECTION_IS_FORWARD: 280 * @dir: #hb_direction_t to test 281 * 282 * Tests whether a text direction moves forward (from left to right, or from 283 * top to bottom). Requires that the direction be valid. 284 * 285 **/ 286 #define HB_DIRECTION_IS_FORWARD(dir) ((((unsigned int) (dir)) & ~2U) == 4) 287 /** 288 * HB_DIRECTION_IS_BACKWARD: 289 * @dir: #hb_direction_t to test 290 * 291 * Tests whether a text direction moves backward (from right to left, or from 292 * bottom to top). Requires that the direction be valid. 293 * 294 **/ 295 #define HB_DIRECTION_IS_BACKWARD(dir) ((((unsigned int) (dir)) & ~2U) == 5) 296 /** 297 * HB_DIRECTION_REVERSE: 298 * @dir: #hb_direction_t to reverse 299 * 300 * Reverses a text direction. Requires that the direction 301 * be valid. 302 * 303 **/ 304 #define HB_DIRECTION_REVERSE(dir) ((hb_direction_t) (((unsigned int) (dir)) ^ 1)) 305 306 307 /* hb_language_t */ 308 309 /** 310 * hb_language_t: 311 * 312 * Data type for languages. Each #hb_language_t corresponds to a BCP 47 313 * language tag. 314 * 315 */ 316 typedef const struct hb_language_impl_t *hb_language_t; 317 318 HB_EXTERN hb_language_t 319 hb_language_from_string (const char *str, int len); 320 321 HB_EXTERN const char * 322 hb_language_to_string (hb_language_t language); 323 324 /** 325 * HB_LANGUAGE_INVALID: 326 * 327 * An unset #hb_language_t. 328 * 329 * Since: 0.6.0 330 */ 331 #define HB_LANGUAGE_INVALID ((hb_language_t) 0) 332 333 HB_EXTERN hb_language_t 334 hb_language_get_default (void); 335 336 HB_EXTERN hb_bool_t 337 hb_language_matches (hb_language_t language, 338 hb_language_t specific); 339 340 /** 341 * hb_script_t: 342 * @HB_SCRIPT_COMMON: `Zyyy` 343 * @HB_SCRIPT_INHERITED: `Zinh` 344 * @HB_SCRIPT_UNKNOWN: `Zzzz` 345 * @HB_SCRIPT_ARABIC: `Arab` 346 * @HB_SCRIPT_ARMENIAN: `Armn` 347 * @HB_SCRIPT_BENGALI: `Beng` 348 * @HB_SCRIPT_CYRILLIC: `Cyrl` 349 * @HB_SCRIPT_DEVANAGARI: `Deva` 350 * @HB_SCRIPT_GEORGIAN: `Geor` 351 * @HB_SCRIPT_GREEK: `Grek` 352 * @HB_SCRIPT_GUJARATI: `Gujr` 353 * @HB_SCRIPT_GURMUKHI: `Guru` 354 * @HB_SCRIPT_HANGUL: `Hang` 355 * @HB_SCRIPT_HAN: `Hani` 356 * @HB_SCRIPT_HEBREW: `Hebr` 357 * @HB_SCRIPT_HIRAGANA: `Hira` 358 * @HB_SCRIPT_KANNADA: `Knda` 359 * @HB_SCRIPT_KATAKANA: `Kana` 360 * @HB_SCRIPT_LAO: `Laoo` 361 * @HB_SCRIPT_LATIN: `Latn` 362 * @HB_SCRIPT_MALAYALAM: `Mlym` 363 * @HB_SCRIPT_ORIYA: `Orya` 364 * @HB_SCRIPT_TAMIL: `Taml` 365 * @HB_SCRIPT_TELUGU: `Telu` 366 * @HB_SCRIPT_THAI: `Thai` 367 * @HB_SCRIPT_TIBETAN: `Tibt` 368 * @HB_SCRIPT_BOPOMOFO: `Bopo` 369 * @HB_SCRIPT_BRAILLE: `Brai` 370 * @HB_SCRIPT_CANADIAN_SYLLABICS: `Cans` 371 * @HB_SCRIPT_CHEROKEE: `Cher` 372 * @HB_SCRIPT_ETHIOPIC: `Ethi` 373 * @HB_SCRIPT_KHMER: `Khmr` 374 * @HB_SCRIPT_MONGOLIAN: `Mong` 375 * @HB_SCRIPT_MYANMAR: `Mymr` 376 * @HB_SCRIPT_OGHAM: `Ogam` 377 * @HB_SCRIPT_RUNIC: `Runr` 378 * @HB_SCRIPT_SINHALA: `Sinh` 379 * @HB_SCRIPT_SYRIAC: `Syrc` 380 * @HB_SCRIPT_THAANA: `Thaa` 381 * @HB_SCRIPT_YI: `Yiii` 382 * @HB_SCRIPT_DESERET: `Dsrt` 383 * @HB_SCRIPT_GOTHIC: `Goth` 384 * @HB_SCRIPT_OLD_ITALIC: `Ital` 385 * @HB_SCRIPT_BUHID: `Buhd` 386 * @HB_SCRIPT_HANUNOO: `Hano` 387 * @HB_SCRIPT_TAGALOG: `Tglg` 388 * @HB_SCRIPT_TAGBANWA: `Tagb` 389 * @HB_SCRIPT_CYPRIOT: `Cprt` 390 * @HB_SCRIPT_LIMBU: `Limb` 391 * @HB_SCRIPT_LINEAR_B: `Linb` 392 * @HB_SCRIPT_OSMANYA: `Osma` 393 * @HB_SCRIPT_SHAVIAN: `Shaw` 394 * @HB_SCRIPT_TAI_LE: `Tale` 395 * @HB_SCRIPT_UGARITIC: `Ugar` 396 * @HB_SCRIPT_BUGINESE: `Bugi` 397 * @HB_SCRIPT_COPTIC: `Copt` 398 * @HB_SCRIPT_GLAGOLITIC: `Glag` 399 * @HB_SCRIPT_KHAROSHTHI: `Khar` 400 * @HB_SCRIPT_NEW_TAI_LUE: `Talu` 401 * @HB_SCRIPT_OLD_PERSIAN: `Xpeo` 402 * @HB_SCRIPT_SYLOTI_NAGRI: `Sylo` 403 * @HB_SCRIPT_TIFINAGH: `Tfng` 404 * @HB_SCRIPT_BALINESE: `Bali` 405 * @HB_SCRIPT_CUNEIFORM: `Xsux` 406 * @HB_SCRIPT_NKO: `Nkoo` 407 * @HB_SCRIPT_PHAGS_PA: `Phag` 408 * @HB_SCRIPT_PHOENICIAN: `Phnx` 409 * @HB_SCRIPT_CARIAN: `Cari` 410 * @HB_SCRIPT_CHAM: `Cham` 411 * @HB_SCRIPT_KAYAH_LI: `Kali` 412 * @HB_SCRIPT_LEPCHA: `Lepc` 413 * @HB_SCRIPT_LYCIAN: `Lyci` 414 * @HB_SCRIPT_LYDIAN: `Lydi` 415 * @HB_SCRIPT_OL_CHIKI: `Olck` 416 * @HB_SCRIPT_REJANG: `Rjng` 417 * @HB_SCRIPT_SAURASHTRA: `Saur` 418 * @HB_SCRIPT_SUNDANESE: `Sund` 419 * @HB_SCRIPT_VAI: `Vaii` 420 * @HB_SCRIPT_AVESTAN: `Avst` 421 * @HB_SCRIPT_BAMUM: `Bamu` 422 * @HB_SCRIPT_EGYPTIAN_HIEROGLYPHS: `Egyp` 423 * @HB_SCRIPT_IMPERIAL_ARAMAIC: `Armi` 424 * @HB_SCRIPT_INSCRIPTIONAL_PAHLAVI: `Phli` 425 * @HB_SCRIPT_INSCRIPTIONAL_PARTHIAN: `Prti` 426 * @HB_SCRIPT_JAVANESE: `Java` 427 * @HB_SCRIPT_KAITHI: `Kthi` 428 * @HB_SCRIPT_LISU: `Lisu` 429 * @HB_SCRIPT_MEETEI_MAYEK: `Mtei` 430 * @HB_SCRIPT_OLD_SOUTH_ARABIAN: `Sarb` 431 * @HB_SCRIPT_OLD_TURKIC: `Orkh` 432 * @HB_SCRIPT_SAMARITAN: `Samr` 433 * @HB_SCRIPT_TAI_THAM: `Lana` 434 * @HB_SCRIPT_TAI_VIET: `Tavt` 435 * @HB_SCRIPT_BATAK: `Batk` 436 * @HB_SCRIPT_BRAHMI: `Brah` 437 * @HB_SCRIPT_MANDAIC: `Mand` 438 * @HB_SCRIPT_CHAKMA: `Cakm` 439 * @HB_SCRIPT_MEROITIC_CURSIVE: `Merc` 440 * @HB_SCRIPT_MEROITIC_HIEROGLYPHS: `Mero` 441 * @HB_SCRIPT_MIAO: `Plrd` 442 * @HB_SCRIPT_SHARADA: `Shrd` 443 * @HB_SCRIPT_SORA_SOMPENG: `Sora` 444 * @HB_SCRIPT_TAKRI: `Takr` 445 * @HB_SCRIPT_BASSA_VAH: `Bass`, Since: 0.9.30 446 * @HB_SCRIPT_CAUCASIAN_ALBANIAN: `Aghb`, Since: 0.9.30 447 * @HB_SCRIPT_DUPLOYAN: `Dupl`, Since: 0.9.30 448 * @HB_SCRIPT_ELBASAN: `Elba`, Since: 0.9.30 449 * @HB_SCRIPT_GRANTHA: `Gran`, Since: 0.9.30 450 * @HB_SCRIPT_KHOJKI: `Khoj`, Since: 0.9.30 451 * @HB_SCRIPT_KHUDAWADI: `Sind`, Since: 0.9.30 452 * @HB_SCRIPT_LINEAR_A: `Lina`, Since: 0.9.30 453 * @HB_SCRIPT_MAHAJANI: `Mahj`, Since: 0.9.30 454 * @HB_SCRIPT_MANICHAEAN: `Mani`, Since: 0.9.30 455 * @HB_SCRIPT_MENDE_KIKAKUI: `Mend`, Since: 0.9.30 456 * @HB_SCRIPT_MODI: `Modi`, Since: 0.9.30 457 * @HB_SCRIPT_MRO: `Mroo`, Since: 0.9.30 458 * @HB_SCRIPT_NABATAEAN: `Nbat`, Since: 0.9.30 459 * @HB_SCRIPT_OLD_NORTH_ARABIAN: `Narb`, Since: 0.9.30 460 * @HB_SCRIPT_OLD_PERMIC: `Perm`, Since: 0.9.30 461 * @HB_SCRIPT_PAHAWH_HMONG: `Hmng`, Since: 0.9.30 462 * @HB_SCRIPT_PALMYRENE: `Palm`, Since: 0.9.30 463 * @HB_SCRIPT_PAU_CIN_HAU: `Pauc`, Since: 0.9.30 464 * @HB_SCRIPT_PSALTER_PAHLAVI: `Phlp`, Since: 0.9.30 465 * @HB_SCRIPT_SIDDHAM: `Sidd`, Since: 0.9.30 466 * @HB_SCRIPT_TIRHUTA: `Tirh`, Since: 0.9.30 467 * @HB_SCRIPT_WARANG_CITI: `Wara`, Since: 0.9.30 468 * @HB_SCRIPT_AHOM: `Ahom`, Since: 0.9.30 469 * @HB_SCRIPT_ANATOLIAN_HIEROGLYPHS: `Hluw`, Since: 0.9.30 470 * @HB_SCRIPT_HATRAN: `Hatr`, Since: 0.9.30 471 * @HB_SCRIPT_MULTANI: `Mult`, Since: 0.9.30 472 * @HB_SCRIPT_OLD_HUNGARIAN: `Hung`, Since: 0.9.30 473 * @HB_SCRIPT_SIGNWRITING: `Sgnw`, Since: 0.9.30 474 * @HB_SCRIPT_ADLAM: `Adlm`, Since: 1.3.0 475 * @HB_SCRIPT_BHAIKSUKI: `Bhks`, Since: 1.3.0 476 * @HB_SCRIPT_MARCHEN: `Marc`, Since: 1.3.0 477 * @HB_SCRIPT_OSAGE: `Osge`, Since: 1.3.0 478 * @HB_SCRIPT_TANGUT: `Tang`, Since: 1.3.0 479 * @HB_SCRIPT_NEWA: `Newa`, Since: 1.3.0 480 * @HB_SCRIPT_MASARAM_GONDI: `Gonm`, Since: 1.6.0 481 * @HB_SCRIPT_NUSHU: `Nshu`, Since: 1.6.0 482 * @HB_SCRIPT_SOYOMBO: `Soyo`, Since: 1.6.0 483 * @HB_SCRIPT_ZANABAZAR_SQUARE: `Zanb`, Since: 1.6.0 484 * @HB_SCRIPT_DOGRA: `Dogr`, Since: 1.8.0 485 * @HB_SCRIPT_GUNJALA_GONDI: `Gong`, Since: 1.8.0 486 * @HB_SCRIPT_HANIFI_ROHINGYA: `Rohg`, Since: 1.8.0 487 * @HB_SCRIPT_MAKASAR: `Maka`, Since: 1.8.0 488 * @HB_SCRIPT_MEDEFAIDRIN: `Medf`, Since: 1.8.0 489 * @HB_SCRIPT_OLD_SOGDIAN: `Sogo`, Since: 1.8.0 490 * @HB_SCRIPT_SOGDIAN: `Sogd`, Since: 1.8.0 491 * @HB_SCRIPT_ELYMAIC: `Elym`, Since: 2.4.0 492 * @HB_SCRIPT_NANDINAGARI: `Nand`, Since: 2.4.0 493 * @HB_SCRIPT_NYIAKENG_PUACHUE_HMONG: `Hmnp`, Since: 2.4.0 494 * @HB_SCRIPT_WANCHO: `Wcho`, Since: 2.4.0 495 * @HB_SCRIPT_CHORASMIAN: `Chrs`, Since: 2.6.7 496 * @HB_SCRIPT_DIVES_AKURU: `Diak`, Since: 2.6.7 497 * @HB_SCRIPT_KHITAN_SMALL_SCRIPT: `Kits`, Since: 2.6.7 498 * @HB_SCRIPT_YEZIDI: `Yezi`, Since: 2.6.7 499 * @HB_SCRIPT_CYPRO_MINOAN: `Cpmn`, Since: 3.0.0 500 * @HB_SCRIPT_OLD_UYGHUR: `Ougr`, Since: 3.0.0 501 * @HB_SCRIPT_TANGSA: `Tnsa`, Since: 3.0.0 502 * @HB_SCRIPT_TOTO: `Toto`, Since: 3.0.0 503 * @HB_SCRIPT_VITHKUQI: `Vith`, Since: 3.0.0 504 * @HB_SCRIPT_MATH: `Zmth`, Since: 3.4.0 505 * @HB_SCRIPT_KAWI: `Kawi`, Since: 5.2.0 506 * @HB_SCRIPT_NAG_MUNDARI: `Nagm`, Since: 5.2.0 507 * @HB_SCRIPT_GARAY: `Gara`, Since: 10.0.0 508 * @HB_SCRIPT_GURUNG_KHEMA: `Gukh`, Since: 10.0.0 509 * @HB_SCRIPT_KIRAT_RAI: `Krai`, Since: 10.0.0 510 * @HB_SCRIPT_OL_ONAL: `Onao`, Since: 10.0.0 511 * @HB_SCRIPT_SUNUWAR: `Sunu`, Since: 10.0.0 512 * @HB_SCRIPT_TODHRI: `Todr`, Since: 10.0.0 513 * @HB_SCRIPT_TULU_TIGALARI: `Tutg`, Since: 10.0.0 514 * @HB_SCRIPT_INVALID: No script set 515 * 516 * Data type for scripts. Each #hb_script_t's value is an #hb_tag_t corresponding 517 * to the four-letter values defined by [ISO 15924](https://unicode.org/iso15924/). 518 * 519 * See also the Script (sc) property of the Unicode Character Database. 520 * 521 **/ 522 523 /* https://docs.google.com/spreadsheets/d/1Y90M0Ie3MUJ6UVCRDOypOtijlMDLNNyyLk36T6iMu0o */ 524 typedef enum 525 { 526 HB_SCRIPT_COMMON = HB_TAG ('Z','y','y','y'), /*1.1*/ 527 HB_SCRIPT_INHERITED = HB_TAG ('Z','i','n','h'), /*1.1*/ 528 HB_SCRIPT_UNKNOWN = HB_TAG ('Z','z','z','z'), /*5.0*/ 529 530 HB_SCRIPT_ARABIC = HB_TAG ('A','r','a','b'), /*1.1*/ 531 HB_SCRIPT_ARMENIAN = HB_TAG ('A','r','m','n'), /*1.1*/ 532 HB_SCRIPT_BENGALI = HB_TAG ('B','e','n','g'), /*1.1*/ 533 HB_SCRIPT_CYRILLIC = HB_TAG ('C','y','r','l'), /*1.1*/ 534 HB_SCRIPT_DEVANAGARI = HB_TAG ('D','e','v','a'), /*1.1*/ 535 HB_SCRIPT_GEORGIAN = HB_TAG ('G','e','o','r'), /*1.1*/ 536 HB_SCRIPT_GREEK = HB_TAG ('G','r','e','k'), /*1.1*/ 537 HB_SCRIPT_GUJARATI = HB_TAG ('G','u','j','r'), /*1.1*/ 538 HB_SCRIPT_GURMUKHI = HB_TAG ('G','u','r','u'), /*1.1*/ 539 HB_SCRIPT_HANGUL = HB_TAG ('H','a','n','g'), /*1.1*/ 540 HB_SCRIPT_HAN = HB_TAG ('H','a','n','i'), /*1.1*/ 541 HB_SCRIPT_HEBREW = HB_TAG ('H','e','b','r'), /*1.1*/ 542 HB_SCRIPT_HIRAGANA = HB_TAG ('H','i','r','a'), /*1.1*/ 543 HB_SCRIPT_KANNADA = HB_TAG ('K','n','d','a'), /*1.1*/ 544 HB_SCRIPT_KATAKANA = HB_TAG ('K','a','n','a'), /*1.1*/ 545 HB_SCRIPT_LAO = HB_TAG ('L','a','o','o'), /*1.1*/ 546 HB_SCRIPT_LATIN = HB_TAG ('L','a','t','n'), /*1.1*/ 547 HB_SCRIPT_MALAYALAM = HB_TAG ('M','l','y','m'), /*1.1*/ 548 HB_SCRIPT_ORIYA = HB_TAG ('O','r','y','a'), /*1.1*/ 549 HB_SCRIPT_TAMIL = HB_TAG ('T','a','m','l'), /*1.1*/ 550 HB_SCRIPT_TELUGU = HB_TAG ('T','e','l','u'), /*1.1*/ 551 HB_SCRIPT_THAI = HB_TAG ('T','h','a','i'), /*1.1*/ 552 553 HB_SCRIPT_TIBETAN = HB_TAG ('T','i','b','t'), /*2.0*/ 554 555 HB_SCRIPT_BOPOMOFO = HB_TAG ('B','o','p','o'), /*3.0*/ 556 HB_SCRIPT_BRAILLE = HB_TAG ('B','r','a','i'), /*3.0*/ 557 HB_SCRIPT_CANADIAN_SYLLABICS = HB_TAG ('C','a','n','s'), /*3.0*/ 558 HB_SCRIPT_CHEROKEE = HB_TAG ('C','h','e','r'), /*3.0*/ 559 HB_SCRIPT_ETHIOPIC = HB_TAG ('E','t','h','i'), /*3.0*/ 560 HB_SCRIPT_KHMER = HB_TAG ('K','h','m','r'), /*3.0*/ 561 HB_SCRIPT_MONGOLIAN = HB_TAG ('M','o','n','g'), /*3.0*/ 562 HB_SCRIPT_MYANMAR = HB_TAG ('M','y','m','r'), /*3.0*/ 563 HB_SCRIPT_OGHAM = HB_TAG ('O','g','a','m'), /*3.0*/ 564 HB_SCRIPT_RUNIC = HB_TAG ('R','u','n','r'), /*3.0*/ 565 HB_SCRIPT_SINHALA = HB_TAG ('S','i','n','h'), /*3.0*/ 566 HB_SCRIPT_SYRIAC = HB_TAG ('S','y','r','c'), /*3.0*/ 567 HB_SCRIPT_THAANA = HB_TAG ('T','h','a','a'), /*3.0*/ 568 HB_SCRIPT_YI = HB_TAG ('Y','i','i','i'), /*3.0*/ 569 570 HB_SCRIPT_DESERET = HB_TAG ('D','s','r','t'), /*3.1*/ 571 HB_SCRIPT_GOTHIC = HB_TAG ('G','o','t','h'), /*3.1*/ 572 HB_SCRIPT_OLD_ITALIC = HB_TAG ('I','t','a','l'), /*3.1*/ 573 574 HB_SCRIPT_BUHID = HB_TAG ('B','u','h','d'), /*3.2*/ 575 HB_SCRIPT_HANUNOO = HB_TAG ('H','a','n','o'), /*3.2*/ 576 HB_SCRIPT_TAGALOG = HB_TAG ('T','g','l','g'), /*3.2*/ 577 HB_SCRIPT_TAGBANWA = HB_TAG ('T','a','g','b'), /*3.2*/ 578 579 HB_SCRIPT_CYPRIOT = HB_TAG ('C','p','r','t'), /*4.0*/ 580 HB_SCRIPT_LIMBU = HB_TAG ('L','i','m','b'), /*4.0*/ 581 HB_SCRIPT_LINEAR_B = HB_TAG ('L','i','n','b'), /*4.0*/ 582 HB_SCRIPT_OSMANYA = HB_TAG ('O','s','m','a'), /*4.0*/ 583 HB_SCRIPT_SHAVIAN = HB_TAG ('S','h','a','w'), /*4.0*/ 584 HB_SCRIPT_TAI_LE = HB_TAG ('T','a','l','e'), /*4.0*/ 585 HB_SCRIPT_UGARITIC = HB_TAG ('U','g','a','r'), /*4.0*/ 586 587 HB_SCRIPT_BUGINESE = HB_TAG ('B','u','g','i'), /*4.1*/ 588 HB_SCRIPT_COPTIC = HB_TAG ('C','o','p','t'), /*4.1*/ 589 HB_SCRIPT_GLAGOLITIC = HB_TAG ('G','l','a','g'), /*4.1*/ 590 HB_SCRIPT_KHAROSHTHI = HB_TAG ('K','h','a','r'), /*4.1*/ 591 HB_SCRIPT_NEW_TAI_LUE = HB_TAG ('T','a','l','u'), /*4.1*/ 592 HB_SCRIPT_OLD_PERSIAN = HB_TAG ('X','p','e','o'), /*4.1*/ 593 HB_SCRIPT_SYLOTI_NAGRI = HB_TAG ('S','y','l','o'), /*4.1*/ 594 HB_SCRIPT_TIFINAGH = HB_TAG ('T','f','n','g'), /*4.1*/ 595 596 HB_SCRIPT_BALINESE = HB_TAG ('B','a','l','i'), /*5.0*/ 597 HB_SCRIPT_CUNEIFORM = HB_TAG ('X','s','u','x'), /*5.0*/ 598 HB_SCRIPT_NKO = HB_TAG ('N','k','o','o'), /*5.0*/ 599 HB_SCRIPT_PHAGS_PA = HB_TAG ('P','h','a','g'), /*5.0*/ 600 HB_SCRIPT_PHOENICIAN = HB_TAG ('P','h','n','x'), /*5.0*/ 601 602 HB_SCRIPT_CARIAN = HB_TAG ('C','a','r','i'), /*5.1*/ 603 HB_SCRIPT_CHAM = HB_TAG ('C','h','a','m'), /*5.1*/ 604 HB_SCRIPT_KAYAH_LI = HB_TAG ('K','a','l','i'), /*5.1*/ 605 HB_SCRIPT_LEPCHA = HB_TAG ('L','e','p','c'), /*5.1*/ 606 HB_SCRIPT_LYCIAN = HB_TAG ('L','y','c','i'), /*5.1*/ 607 HB_SCRIPT_LYDIAN = HB_TAG ('L','y','d','i'), /*5.1*/ 608 HB_SCRIPT_OL_CHIKI = HB_TAG ('O','l','c','k'), /*5.1*/ 609 HB_SCRIPT_REJANG = HB_TAG ('R','j','n','g'), /*5.1*/ 610 HB_SCRIPT_SAURASHTRA = HB_TAG ('S','a','u','r'), /*5.1*/ 611 HB_SCRIPT_SUNDANESE = HB_TAG ('S','u','n','d'), /*5.1*/ 612 HB_SCRIPT_VAI = HB_TAG ('V','a','i','i'), /*5.1*/ 613 614 HB_SCRIPT_AVESTAN = HB_TAG ('A','v','s','t'), /*5.2*/ 615 HB_SCRIPT_BAMUM = HB_TAG ('B','a','m','u'), /*5.2*/ 616 HB_SCRIPT_EGYPTIAN_HIEROGLYPHS = HB_TAG ('E','g','y','p'), /*5.2*/ 617 HB_SCRIPT_IMPERIAL_ARAMAIC = HB_TAG ('A','r','m','i'), /*5.2*/ 618 HB_SCRIPT_INSCRIPTIONAL_PAHLAVI = HB_TAG ('P','h','l','i'), /*5.2*/ 619 HB_SCRIPT_INSCRIPTIONAL_PARTHIAN = HB_TAG ('P','r','t','i'), /*5.2*/ 620 HB_SCRIPT_JAVANESE = HB_TAG ('J','a','v','a'), /*5.2*/ 621 HB_SCRIPT_KAITHI = HB_TAG ('K','t','h','i'), /*5.2*/ 622 HB_SCRIPT_LISU = HB_TAG ('L','i','s','u'), /*5.2*/ 623 HB_SCRIPT_MEETEI_MAYEK = HB_TAG ('M','t','e','i'), /*5.2*/ 624 HB_SCRIPT_OLD_SOUTH_ARABIAN = HB_TAG ('S','a','r','b'), /*5.2*/ 625 HB_SCRIPT_OLD_TURKIC = HB_TAG ('O','r','k','h'), /*5.2*/ 626 HB_SCRIPT_SAMARITAN = HB_TAG ('S','a','m','r'), /*5.2*/ 627 HB_SCRIPT_TAI_THAM = HB_TAG ('L','a','n','a'), /*5.2*/ 628 HB_SCRIPT_TAI_VIET = HB_TAG ('T','a','v','t'), /*5.2*/ 629 630 HB_SCRIPT_BATAK = HB_TAG ('B','a','t','k'), /*6.0*/ 631 HB_SCRIPT_BRAHMI = HB_TAG ('B','r','a','h'), /*6.0*/ 632 HB_SCRIPT_MANDAIC = HB_TAG ('M','a','n','d'), /*6.0*/ 633 634 HB_SCRIPT_CHAKMA = HB_TAG ('C','a','k','m'), /*6.1*/ 635 HB_SCRIPT_MEROITIC_CURSIVE = HB_TAG ('M','e','r','c'), /*6.1*/ 636 HB_SCRIPT_MEROITIC_HIEROGLYPHS = HB_TAG ('M','e','r','o'), /*6.1*/ 637 HB_SCRIPT_MIAO = HB_TAG ('P','l','r','d'), /*6.1*/ 638 HB_SCRIPT_SHARADA = HB_TAG ('S','h','r','d'), /*6.1*/ 639 HB_SCRIPT_SORA_SOMPENG = HB_TAG ('S','o','r','a'), /*6.1*/ 640 HB_SCRIPT_TAKRI = HB_TAG ('T','a','k','r'), /*6.1*/ 641 642 /* 643 * Since: 0.9.30 644 */ 645 HB_SCRIPT_BASSA_VAH = HB_TAG ('B','a','s','s'), /*7.0*/ 646 HB_SCRIPT_CAUCASIAN_ALBANIAN = HB_TAG ('A','g','h','b'), /*7.0*/ 647 HB_SCRIPT_DUPLOYAN = HB_TAG ('D','u','p','l'), /*7.0*/ 648 HB_SCRIPT_ELBASAN = HB_TAG ('E','l','b','a'), /*7.0*/ 649 HB_SCRIPT_GRANTHA = HB_TAG ('G','r','a','n'), /*7.0*/ 650 HB_SCRIPT_KHOJKI = HB_TAG ('K','h','o','j'), /*7.0*/ 651 HB_SCRIPT_KHUDAWADI = HB_TAG ('S','i','n','d'), /*7.0*/ 652 HB_SCRIPT_LINEAR_A = HB_TAG ('L','i','n','a'), /*7.0*/ 653 HB_SCRIPT_MAHAJANI = HB_TAG ('M','a','h','j'), /*7.0*/ 654 HB_SCRIPT_MANICHAEAN = HB_TAG ('M','a','n','i'), /*7.0*/ 655 HB_SCRIPT_MENDE_KIKAKUI = HB_TAG ('M','e','n','d'), /*7.0*/ 656 HB_SCRIPT_MODI = HB_TAG ('M','o','d','i'), /*7.0*/ 657 HB_SCRIPT_MRO = HB_TAG ('M','r','o','o'), /*7.0*/ 658 HB_SCRIPT_NABATAEAN = HB_TAG ('N','b','a','t'), /*7.0*/ 659 HB_SCRIPT_OLD_NORTH_ARABIAN = HB_TAG ('N','a','r','b'), /*7.0*/ 660 HB_SCRIPT_OLD_PERMIC = HB_TAG ('P','e','r','m'), /*7.0*/ 661 HB_SCRIPT_PAHAWH_HMONG = HB_TAG ('H','m','n','g'), /*7.0*/ 662 HB_SCRIPT_PALMYRENE = HB_TAG ('P','a','l','m'), /*7.0*/ 663 HB_SCRIPT_PAU_CIN_HAU = HB_TAG ('P','a','u','c'), /*7.0*/ 664 HB_SCRIPT_PSALTER_PAHLAVI = HB_TAG ('P','h','l','p'), /*7.0*/ 665 HB_SCRIPT_SIDDHAM = HB_TAG ('S','i','d','d'), /*7.0*/ 666 HB_SCRIPT_TIRHUTA = HB_TAG ('T','i','r','h'), /*7.0*/ 667 HB_SCRIPT_WARANG_CITI = HB_TAG ('W','a','r','a'), /*7.0*/ 668 669 HB_SCRIPT_AHOM = HB_TAG ('A','h','o','m'), /*8.0*/ 670 HB_SCRIPT_ANATOLIAN_HIEROGLYPHS = HB_TAG ('H','l','u','w'), /*8.0*/ 671 HB_SCRIPT_HATRAN = HB_TAG ('H','a','t','r'), /*8.0*/ 672 HB_SCRIPT_MULTANI = HB_TAG ('M','u','l','t'), /*8.0*/ 673 HB_SCRIPT_OLD_HUNGARIAN = HB_TAG ('H','u','n','g'), /*8.0*/ 674 HB_SCRIPT_SIGNWRITING = HB_TAG ('S','g','n','w'), /*8.0*/ 675 676 /* 677 * Since 1.3.0 678 */ 679 HB_SCRIPT_ADLAM = HB_TAG ('A','d','l','m'), /*9.0*/ 680 HB_SCRIPT_BHAIKSUKI = HB_TAG ('B','h','k','s'), /*9.0*/ 681 HB_SCRIPT_MARCHEN = HB_TAG ('M','a','r','c'), /*9.0*/ 682 HB_SCRIPT_OSAGE = HB_TAG ('O','s','g','e'), /*9.0*/ 683 HB_SCRIPT_TANGUT = HB_TAG ('T','a','n','g'), /*9.0*/ 684 HB_SCRIPT_NEWA = HB_TAG ('N','e','w','a'), /*9.0*/ 685 686 /* 687 * Since 1.6.0 688 */ 689 HB_SCRIPT_MASARAM_GONDI = HB_TAG ('G','o','n','m'), /*10.0*/ 690 HB_SCRIPT_NUSHU = HB_TAG ('N','s','h','u'), /*10.0*/ 691 HB_SCRIPT_SOYOMBO = HB_TAG ('S','o','y','o'), /*10.0*/ 692 HB_SCRIPT_ZANABAZAR_SQUARE = HB_TAG ('Z','a','n','b'), /*10.0*/ 693 694 /* 695 * Since 1.8.0 696 */ 697 HB_SCRIPT_DOGRA = HB_TAG ('D','o','g','r'), /*11.0*/ 698 HB_SCRIPT_GUNJALA_GONDI = HB_TAG ('G','o','n','g'), /*11.0*/ 699 HB_SCRIPT_HANIFI_ROHINGYA = HB_TAG ('R','o','h','g'), /*11.0*/ 700 HB_SCRIPT_MAKASAR = HB_TAG ('M','a','k','a'), /*11.0*/ 701 HB_SCRIPT_MEDEFAIDRIN = HB_TAG ('M','e','d','f'), /*11.0*/ 702 HB_SCRIPT_OLD_SOGDIAN = HB_TAG ('S','o','g','o'), /*11.0*/ 703 HB_SCRIPT_SOGDIAN = HB_TAG ('S','o','g','d'), /*11.0*/ 704 705 /* 706 * Since 2.4.0 707 */ 708 HB_SCRIPT_ELYMAIC = HB_TAG ('E','l','y','m'), /*12.0*/ 709 HB_SCRIPT_NANDINAGARI = HB_TAG ('N','a','n','d'), /*12.0*/ 710 HB_SCRIPT_NYIAKENG_PUACHUE_HMONG = HB_TAG ('H','m','n','p'), /*12.0*/ 711 HB_SCRIPT_WANCHO = HB_TAG ('W','c','h','o'), /*12.0*/ 712 713 /* 714 * Since 2.6.7 715 */ 716 HB_SCRIPT_CHORASMIAN = HB_TAG ('C','h','r','s'), /*13.0*/ 717 HB_SCRIPT_DIVES_AKURU = HB_TAG ('D','i','a','k'), /*13.0*/ 718 HB_SCRIPT_KHITAN_SMALL_SCRIPT = HB_TAG ('K','i','t','s'), /*13.0*/ 719 HB_SCRIPT_YEZIDI = HB_TAG ('Y','e','z','i'), /*13.0*/ 720 721 /* 722 * Since 3.0.0 723 */ 724 HB_SCRIPT_CYPRO_MINOAN = HB_TAG ('C','p','m','n'), /*14.0*/ 725 HB_SCRIPT_OLD_UYGHUR = HB_TAG ('O','u','g','r'), /*14.0*/ 726 HB_SCRIPT_TANGSA = HB_TAG ('T','n','s','a'), /*14.0*/ 727 HB_SCRIPT_TOTO = HB_TAG ('T','o','t','o'), /*14.0*/ 728 HB_SCRIPT_VITHKUQI = HB_TAG ('V','i','t','h'), /*14.0*/ 729 730 /* 731 * Since 3.4.0 732 */ 733 HB_SCRIPT_MATH = HB_TAG ('Z','m','t','h'), 734 735 /* 736 * Since 5.2.0 737 */ 738 HB_SCRIPT_KAWI = HB_TAG ('K','a','w','i'), /*15.0*/ 739 HB_SCRIPT_NAG_MUNDARI = HB_TAG ('N','a','g','m'), /*15.0*/ 740 741 /* 742 * Since 10.0.0 743 */ 744 HB_SCRIPT_GARAY = HB_TAG ('G','a','r','a'), /*16.0*/ 745 HB_SCRIPT_GURUNG_KHEMA = HB_TAG ('G','u','k','h'), /*16.0*/ 746 HB_SCRIPT_KIRAT_RAI = HB_TAG ('K','r','a','i'), /*16.0*/ 747 HB_SCRIPT_OL_ONAL = HB_TAG ('O','n','a','o'), /*16.0*/ 748 HB_SCRIPT_SUNUWAR = HB_TAG ('S','u','n','u'), /*16.0*/ 749 HB_SCRIPT_TODHRI = HB_TAG ('T','o','d','r'), /*16.0*/ 750 HB_SCRIPT_TULU_TIGALARI = HB_TAG ('T','u','t','g'), /*16.0*/ 751 752 /* No script set. */ 753 HB_SCRIPT_INVALID = HB_TAG_NONE, 754 755 /*< private >*/ 756 757 /* Dummy values to ensure any hb_tag_t value can be passed/stored as hb_script_t 758 * without risking undefined behavior. We have two, for historical reasons. 759 * HB_TAG_MAX used to be unsigned, but that was invalid Ansi C, so was changed 760 * to _HB_SCRIPT_MAX_VALUE to be equal to HB_TAG_MAX_SIGNED as well. 761 * 762 * See this thread for technicalities: 763 * 764 * https://lists.freedesktop.org/archives/harfbuzz/2014-March/004150.html 765 */ 766 _HB_SCRIPT_MAX_VALUE = HB_TAG_MAX_SIGNED, /*< skip >*/ 767 _HB_SCRIPT_MAX_VALUE_SIGNED = HB_TAG_MAX_SIGNED /*< skip >*/ 768 769 } hb_script_t; 770 771 772 /* Script functions */ 773 774 HB_EXTERN hb_script_t 775 hb_script_from_iso15924_tag (hb_tag_t tag); 776 777 HB_EXTERN hb_script_t 778 hb_script_from_string (const char *str, int len); 779 780 HB_EXTERN hb_tag_t 781 hb_script_to_iso15924_tag (hb_script_t script); 782 783 HB_EXTERN hb_direction_t 784 hb_script_get_horizontal_direction (hb_script_t script); 785 786 787 /* User data */ 788 789 /** 790 * hb_user_data_key_t: 791 * 792 * Data structure for holding user-data keys. 793 * 794 **/ 795 typedef struct hb_user_data_key_t { 796 /*< private >*/ 797 char unused; 798 } hb_user_data_key_t; 799 800 /** 801 * hb_destroy_func_t: 802 * @user_data: the data to be destroyed 803 * 804 * A virtual method for destroy user-data callbacks. 805 * 806 */ 807 typedef void (*hb_destroy_func_t) (void *user_data); 808 809 810 /* Font features and variations. */ 811 812 /** 813 * HB_FEATURE_GLOBAL_START: 814 * 815 * Special setting for #hb_feature_t.start to apply the feature from the start 816 * of the buffer. 817 * 818 * Since: 2.0.0 819 */ 820 #define HB_FEATURE_GLOBAL_START 0 821 822 /** 823 * HB_FEATURE_GLOBAL_END: 824 * 825 * Special setting for #hb_feature_t.end to apply the feature from to the end 826 * of the buffer. 827 * 828 * Since: 2.0.0 829 */ 830 #define HB_FEATURE_GLOBAL_END ((unsigned int) -1) 831 832 /** 833 * hb_feature_t: 834 * @tag: The #hb_tag_t tag of the feature 835 * @value: The value of the feature. 0 disables the feature, non-zero (usually 836 * 1) enables the feature. For features implemented as lookup type 3 (like 837 * 'salt') the @value is a one based index into the alternates. 838 * @start: the cluster to start applying this feature setting (inclusive). 839 * @end: the cluster to end applying this feature setting (exclusive). 840 * 841 * The #hb_feature_t is the structure that holds information about requested 842 * feature application. The feature will be applied with the given value to all 843 * glyphs which are in clusters between @start (inclusive) and @end (exclusive). 844 * Setting start to #HB_FEATURE_GLOBAL_START and end to #HB_FEATURE_GLOBAL_END 845 * specifies that the feature always applies to the entire buffer. 846 */ 847 typedef struct hb_feature_t { 848 hb_tag_t tag; 849 uint32_t value; 850 unsigned int start; 851 unsigned int end; 852 } hb_feature_t; 853 854 HB_EXTERN hb_bool_t 855 hb_feature_from_string (const char *str, int len, 856 hb_feature_t *feature); 857 858 HB_EXTERN void 859 hb_feature_to_string (hb_feature_t *feature, 860 char *buf, unsigned int size); 861 862 /** 863 * hb_variation_t: 864 * @tag: The #hb_tag_t tag of the variation-axis name 865 * @value: The value of the variation axis 866 * 867 * Data type for holding variation data. Registered OpenType 868 * variation-axis tags are listed in 869 * [OpenType Axis Tag Registry](https://docs.microsoft.com/en-us/typography/opentype/spec/dvaraxisreg). 870 * 871 * Since: 1.4.2 872 */ 873 typedef struct hb_variation_t { 874 hb_tag_t tag; 875 float value; 876 } hb_variation_t; 877 878 HB_EXTERN hb_bool_t 879 hb_variation_from_string (const char *str, int len, 880 hb_variation_t *variation); 881 882 HB_EXTERN void 883 hb_variation_to_string (hb_variation_t *variation, 884 char *buf, unsigned int size); 885 886 /** 887 * hb_color_t: 888 * 889 * Data type for holding color values. Colors are eight bits per 890 * channel RGB plus alpha transparency. 891 * 892 * Since: 2.1.0 893 */ 894 typedef uint32_t hb_color_t; 895 896 /** 897 * HB_COLOR: 898 * @b: blue channel value 899 * @g: green channel value 900 * @r: red channel value 901 * @a: alpha channel value 902 * 903 * Constructs an #hb_color_t from four integers. 904 * 905 * Since: 2.1.0 906 */ 907 #define HB_COLOR(b,g,r,a) ((hb_color_t) HB_TAG ((b),(g),(r),(a))) 908 909 HB_EXTERN uint8_t 910 hb_color_get_alpha (hb_color_t color); 911 #define hb_color_get_alpha(color) ((color) & 0xFF) 912 913 HB_EXTERN uint8_t 914 hb_color_get_red (hb_color_t color); 915 #define hb_color_get_red(color) (((color) >> 8) & 0xFF) 916 917 HB_EXTERN uint8_t 918 hb_color_get_green (hb_color_t color); 919 #define hb_color_get_green(color) (((color) >> 16) & 0xFF) 920 921 HB_EXTERN uint8_t 922 hb_color_get_blue (hb_color_t color); 923 #define hb_color_get_blue(color) (((color) >> 24) & 0xFF) 924 925 /** 926 * hb_glyph_extents_t: 927 * @x_bearing: Distance from the x-origin to the left extremum of the glyph. 928 * @y_bearing: Distance from the top extremum of the glyph to the y-origin. 929 * @width: Distance from the left extremum of the glyph to the right extremum. 930 * @height: Distance from the top extremum of the glyph to the bottom extremum. 931 * 932 * Glyph extent values, measured in font units. 933 * 934 * Note that @height is negative, in coordinate systems that grow up. 935 **/ 936 typedef struct hb_glyph_extents_t { 937 hb_position_t x_bearing; 938 hb_position_t y_bearing; 939 hb_position_t width; 940 hb_position_t height; 941 } hb_glyph_extents_t; 942 943 /** 944 * hb_font_t: 945 * 946 * Data type for holding fonts. 947 * 948 */ 949 typedef struct hb_font_t hb_font_t; 950 951 HB_END_DECLS 952 953 #endif /* HB_COMMON_H */ 954