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 #ifndef HB_H_IN
30 #error "Include <hb.h> instead."
31 #endif
32
33 #ifndef HB_COMMON_H
34 #define HB_COMMON_H
35
36 #ifndef HB_BEGIN_DECLS
37 # ifdef __cplusplus
38 # define HB_BEGIN_DECLS extern "C" {
39 # define HB_END_DECLS }
40 # else /* !__cplusplus */
41 # define HB_BEGIN_DECLS
42 # define HB_END_DECLS
43 # endif /* !__cplusplus */
44 #endif
45
46 #if defined (_SVR4) || defined (SVR4) || defined (__OpenBSD__) || \
47 defined (_sgi) || defined (__sun) || defined (sun) || \
48 defined (__digital__) || defined (__HP_cc)
49 # include <inttypes.h>
50 #elif defined (_AIX)
51 # include <sys/inttypes.h>
52 #else
53 # include <stdint.h>
54 #endif
55
56 HB_BEGIN_DECLS
57
58
59 typedef int hb_bool_t;
60
61 typedef uint32_t hb_codepoint_t;
62 typedef int32_t hb_position_t;
63 typedef uint32_t hb_mask_t;
64
65 typedef union _hb_var_int_t {
66 uint32_t u32;
67 int32_t i32;
68 uint16_t u16[2];
69 int16_t i16[2];
70 uint8_t u8[4];
71 int8_t i8[4];
72 } hb_var_int_t;
73
74
75 /* hb_tag_t */
76
77 typedef uint32_t hb_tag_t;
78
79 #define HB_TAG(c1,c2,c3,c4) ((hb_tag_t)((((uint8_t)(c1))<<24)|(((uint8_t)(c2))<<16)|(((uint8_t)(c3))<<8)|((uint8_t)(c4))))
80 #define HB_UNTAG(tag) ((uint8_t)((tag)>>24)), ((uint8_t)((tag)>>16)), ((uint8_t)((tag)>>8)), ((uint8_t)(tag))
81
82 #define HB_TAG_NONE HB_TAG(0,0,0,0)
83 #define HB_TAG_MAX HB_TAG(0xff,0xff,0xff,0xff)
84 #define HB_TAG_MAX_SIGNED HB_TAG(0x7f,0xff,0xff,0xff)
85
86 /* len=-1 means str is NUL-terminated. */
87 HB_EXTERN hb_tag_t
88 hb_tag_from_string (const char *str, int len);
89
90 /* buf should have 4 bytes. */
91 HB_EXTERN void
92 hb_tag_to_string (hb_tag_t tag, char *buf);
93
94
95 /**
96 * hb_direction_t:
97 * @HB_DIRECTION_INVALID: Initial, unset direction.
98 * @HB_DIRECTION_LTR: Text is set horizontally from left to right.
99 * @HB_DIRECTION_RTL: Text is set horizontally from right to left.
100 * @HB_DIRECTION_TTB: Text is set vertically from top to bottom.
101 * @HB_DIRECTION_BTT: Text is set vertically from bottom to top.
102 */
103 typedef enum {
104 HB_DIRECTION_INVALID = 0,
105 HB_DIRECTION_LTR = 4,
106 HB_DIRECTION_RTL,
107 HB_DIRECTION_TTB,
108 HB_DIRECTION_BTT
109 } hb_direction_t;
110
111 /* len=-1 means str is NUL-terminated */
112 HB_EXTERN hb_direction_t
113 hb_direction_from_string (const char *str, int len);
114
115 HB_EXTERN const char *
116 hb_direction_to_string (hb_direction_t direction);
117
118 #define HB_DIRECTION_IS_VALID(dir) ((((unsigned int) (dir)) & ~3U) == 4)
119 /* Direction must be valid for the following */
120 #define HB_DIRECTION_IS_HORIZONTAL(dir) ((((unsigned int) (dir)) & ~1U) == 4)
121 #define HB_DIRECTION_IS_VERTICAL(dir) ((((unsigned int) (dir)) & ~1U) == 6)
122 #define HB_DIRECTION_IS_FORWARD(dir) ((((unsigned int) (dir)) & ~2U) == 4)
123 #define HB_DIRECTION_IS_BACKWARD(dir) ((((unsigned int) (dir)) & ~2U) == 5)
124 #define HB_DIRECTION_REVERSE(dir) ((hb_direction_t) (((unsigned int) (dir)) ^ 1))
125
126
127 /* hb_language_t */
128
129 typedef const struct hb_language_impl_t *hb_language_t;
130
131 HB_EXTERN hb_language_t
132 hb_language_from_string (const char *str, int len);
133
134 HB_EXTERN const char *
135 hb_language_to_string (hb_language_t language);
136
137 #define HB_LANGUAGE_INVALID ((hb_language_t) 0)
138
139 HB_EXTERN hb_language_t
140 hb_language_get_default (void);
141
142
143 /* hb_script_t */
144
145 /* http://unicode.org/iso15924/ */
146 /* http://goo.gl/x9ilM */
147 /* Unicode Character Database property: Script (sc) */
148 typedef enum
149 {
150 /*1.1*/ HB_SCRIPT_COMMON = HB_TAG ('Z','y','y','y'),
151 /*1.1*/ HB_SCRIPT_INHERITED = HB_TAG ('Z','i','n','h'),
152 /*5.0*/ HB_SCRIPT_UNKNOWN = HB_TAG ('Z','z','z','z'),
153
154 /*1.1*/ HB_SCRIPT_ARABIC = HB_TAG ('A','r','a','b'),
155 /*1.1*/ HB_SCRIPT_ARMENIAN = HB_TAG ('A','r','m','n'),
156 /*1.1*/ HB_SCRIPT_BENGALI = HB_TAG ('B','e','n','g'),
157 /*1.1*/ HB_SCRIPT_CYRILLIC = HB_TAG ('C','y','r','l'),
158 /*1.1*/ HB_SCRIPT_DEVANAGARI = HB_TAG ('D','e','v','a'),
159 /*1.1*/ HB_SCRIPT_GEORGIAN = HB_TAG ('G','e','o','r'),
160 /*1.1*/ HB_SCRIPT_GREEK = HB_TAG ('G','r','e','k'),
161 /*1.1*/ HB_SCRIPT_GUJARATI = HB_TAG ('G','u','j','r'),
162 /*1.1*/ HB_SCRIPT_GURMUKHI = HB_TAG ('G','u','r','u'),
163 /*1.1*/ HB_SCRIPT_HANGUL = HB_TAG ('H','a','n','g'),
164 /*1.1*/ HB_SCRIPT_HAN = HB_TAG ('H','a','n','i'),
165 /*1.1*/ HB_SCRIPT_HEBREW = HB_TAG ('H','e','b','r'),
166 /*1.1*/ HB_SCRIPT_HIRAGANA = HB_TAG ('H','i','r','a'),
167 /*1.1*/ HB_SCRIPT_KANNADA = HB_TAG ('K','n','d','a'),
168 /*1.1*/ HB_SCRIPT_KATAKANA = HB_TAG ('K','a','n','a'),
169 /*1.1*/ HB_SCRIPT_LAO = HB_TAG ('L','a','o','o'),
170 /*1.1*/ HB_SCRIPT_LATIN = HB_TAG ('L','a','t','n'),
171 /*1.1*/ HB_SCRIPT_MALAYALAM = HB_TAG ('M','l','y','m'),
172 /*1.1*/ HB_SCRIPT_ORIYA = HB_TAG ('O','r','y','a'),
173 /*1.1*/ HB_SCRIPT_TAMIL = HB_TAG ('T','a','m','l'),
174 /*1.1*/ HB_SCRIPT_TELUGU = HB_TAG ('T','e','l','u'),
175 /*1.1*/ HB_SCRIPT_THAI = HB_TAG ('T','h','a','i'),
176
177 /*2.0*/ HB_SCRIPT_TIBETAN = HB_TAG ('T','i','b','t'),
178
179 /*3.0*/ HB_SCRIPT_BOPOMOFO = HB_TAG ('B','o','p','o'),
180 /*3.0*/ HB_SCRIPT_BRAILLE = HB_TAG ('B','r','a','i'),
181 /*3.0*/ HB_SCRIPT_CANADIAN_SYLLABICS = HB_TAG ('C','a','n','s'),
182 /*3.0*/ HB_SCRIPT_CHEROKEE = HB_TAG ('C','h','e','r'),
183 /*3.0*/ HB_SCRIPT_ETHIOPIC = HB_TAG ('E','t','h','i'),
184 /*3.0*/ HB_SCRIPT_KHMER = HB_TAG ('K','h','m','r'),
185 /*3.0*/ HB_SCRIPT_MONGOLIAN = HB_TAG ('M','o','n','g'),
186 /*3.0*/ HB_SCRIPT_MYANMAR = HB_TAG ('M','y','m','r'),
187 /*3.0*/ HB_SCRIPT_OGHAM = HB_TAG ('O','g','a','m'),
188 /*3.0*/ HB_SCRIPT_RUNIC = HB_TAG ('R','u','n','r'),
189 /*3.0*/ HB_SCRIPT_SINHALA = HB_TAG ('S','i','n','h'),
190 /*3.0*/ HB_SCRIPT_SYRIAC = HB_TAG ('S','y','r','c'),
191 /*3.0*/ HB_SCRIPT_THAANA = HB_TAG ('T','h','a','a'),
192 /*3.0*/ HB_SCRIPT_YI = HB_TAG ('Y','i','i','i'),
193
194 /*3.1*/ HB_SCRIPT_DESERET = HB_TAG ('D','s','r','t'),
195 /*3.1*/ HB_SCRIPT_GOTHIC = HB_TAG ('G','o','t','h'),
196 /*3.1*/ HB_SCRIPT_OLD_ITALIC = HB_TAG ('I','t','a','l'),
197
198 /*3.2*/ HB_SCRIPT_BUHID = HB_TAG ('B','u','h','d'),
199 /*3.2*/ HB_SCRIPT_HANUNOO = HB_TAG ('H','a','n','o'),
200 /*3.2*/ HB_SCRIPT_TAGALOG = HB_TAG ('T','g','l','g'),
201 /*3.2*/ HB_SCRIPT_TAGBANWA = HB_TAG ('T','a','g','b'),
202
203 /*4.0*/ HB_SCRIPT_CYPRIOT = HB_TAG ('C','p','r','t'),
204 /*4.0*/ HB_SCRIPT_LIMBU = HB_TAG ('L','i','m','b'),
205 /*4.0*/ HB_SCRIPT_LINEAR_B = HB_TAG ('L','i','n','b'),
206 /*4.0*/ HB_SCRIPT_OSMANYA = HB_TAG ('O','s','m','a'),
207 /*4.0*/ HB_SCRIPT_SHAVIAN = HB_TAG ('S','h','a','w'),
208 /*4.0*/ HB_SCRIPT_TAI_LE = HB_TAG ('T','a','l','e'),
209 /*4.0*/ HB_SCRIPT_UGARITIC = HB_TAG ('U','g','a','r'),
210
211 /*4.1*/ HB_SCRIPT_BUGINESE = HB_TAG ('B','u','g','i'),
212 /*4.1*/ HB_SCRIPT_COPTIC = HB_TAG ('C','o','p','t'),
213 /*4.1*/ HB_SCRIPT_GLAGOLITIC = HB_TAG ('G','l','a','g'),
214 /*4.1*/ HB_SCRIPT_KHAROSHTHI = HB_TAG ('K','h','a','r'),
215 /*4.1*/ HB_SCRIPT_NEW_TAI_LUE = HB_TAG ('T','a','l','u'),
216 /*4.1*/ HB_SCRIPT_OLD_PERSIAN = HB_TAG ('X','p','e','o'),
217 /*4.1*/ HB_SCRIPT_SYLOTI_NAGRI = HB_TAG ('S','y','l','o'),
218 /*4.1*/ HB_SCRIPT_TIFINAGH = HB_TAG ('T','f','n','g'),
219
220 /*5.0*/ HB_SCRIPT_BALINESE = HB_TAG ('B','a','l','i'),
221 /*5.0*/ HB_SCRIPT_CUNEIFORM = HB_TAG ('X','s','u','x'),
222 /*5.0*/ HB_SCRIPT_NKO = HB_TAG ('N','k','o','o'),
223 /*5.0*/ HB_SCRIPT_PHAGS_PA = HB_TAG ('P','h','a','g'),
224 /*5.0*/ HB_SCRIPT_PHOENICIAN = HB_TAG ('P','h','n','x'),
225
226 /*5.1*/ HB_SCRIPT_CARIAN = HB_TAG ('C','a','r','i'),
227 /*5.1*/ HB_SCRIPT_CHAM = HB_TAG ('C','h','a','m'),
228 /*5.1*/ HB_SCRIPT_KAYAH_LI = HB_TAG ('K','a','l','i'),
229 /*5.1*/ HB_SCRIPT_LEPCHA = HB_TAG ('L','e','p','c'),
230 /*5.1*/ HB_SCRIPT_LYCIAN = HB_TAG ('L','y','c','i'),
231 /*5.1*/ HB_SCRIPT_LYDIAN = HB_TAG ('L','y','d','i'),
232 /*5.1*/ HB_SCRIPT_OL_CHIKI = HB_TAG ('O','l','c','k'),
233 /*5.1*/ HB_SCRIPT_REJANG = HB_TAG ('R','j','n','g'),
234 /*5.1*/ HB_SCRIPT_SAURASHTRA = HB_TAG ('S','a','u','r'),
235 /*5.1*/ HB_SCRIPT_SUNDANESE = HB_TAG ('S','u','n','d'),
236 /*5.1*/ HB_SCRIPT_VAI = HB_TAG ('V','a','i','i'),
237
238 /*5.2*/ HB_SCRIPT_AVESTAN = HB_TAG ('A','v','s','t'),
239 /*5.2*/ HB_SCRIPT_BAMUM = HB_TAG ('B','a','m','u'),
240 /*5.2*/ HB_SCRIPT_EGYPTIAN_HIEROGLYPHS = HB_TAG ('E','g','y','p'),
241 /*5.2*/ HB_SCRIPT_IMPERIAL_ARAMAIC = HB_TAG ('A','r','m','i'),
242 /*5.2*/ HB_SCRIPT_INSCRIPTIONAL_PAHLAVI = HB_TAG ('P','h','l','i'),
243 /*5.2*/ HB_SCRIPT_INSCRIPTIONAL_PARTHIAN = HB_TAG ('P','r','t','i'),
244 /*5.2*/ HB_SCRIPT_JAVANESE = HB_TAG ('J','a','v','a'),
245 /*5.2*/ HB_SCRIPT_KAITHI = HB_TAG ('K','t','h','i'),
246 /*5.2*/ HB_SCRIPT_LISU = HB_TAG ('L','i','s','u'),
247 /*5.2*/ HB_SCRIPT_MEETEI_MAYEK = HB_TAG ('M','t','e','i'),
248 /*5.2*/ HB_SCRIPT_OLD_SOUTH_ARABIAN = HB_TAG ('S','a','r','b'),
249 /*5.2*/ HB_SCRIPT_OLD_TURKIC = HB_TAG ('O','r','k','h'),
250 /*5.2*/ HB_SCRIPT_SAMARITAN = HB_TAG ('S','a','m','r'),
251 /*5.2*/ HB_SCRIPT_TAI_THAM = HB_TAG ('L','a','n','a'),
252 /*5.2*/ HB_SCRIPT_TAI_VIET = HB_TAG ('T','a','v','t'),
253
254 /*6.0*/ HB_SCRIPT_BATAK = HB_TAG ('B','a','t','k'),
255 /*6.0*/ HB_SCRIPT_BRAHMI = HB_TAG ('B','r','a','h'),
256 /*6.0*/ HB_SCRIPT_MANDAIC = HB_TAG ('M','a','n','d'),
257
258 /*6.1*/ HB_SCRIPT_CHAKMA = HB_TAG ('C','a','k','m'),
259 /*6.1*/ HB_SCRIPT_MEROITIC_CURSIVE = HB_TAG ('M','e','r','c'),
260 /*6.1*/ HB_SCRIPT_MEROITIC_HIEROGLYPHS = HB_TAG ('M','e','r','o'),
261 /*6.1*/ HB_SCRIPT_MIAO = HB_TAG ('P','l','r','d'),
262 /*6.1*/ HB_SCRIPT_SHARADA = HB_TAG ('S','h','r','d'),
263 /*6.1*/ HB_SCRIPT_SORA_SOMPENG = HB_TAG ('S','o','r','a'),
264 /*6.1*/ HB_SCRIPT_TAKRI = HB_TAG ('T','a','k','r'),
265
266 /*
267 * Since: 0.9.30
268 */
269 /*7.0*/ HB_SCRIPT_BASSA_VAH = HB_TAG ('B','a','s','s'),
270 /*7.0*/ HB_SCRIPT_CAUCASIAN_ALBANIAN = HB_TAG ('A','g','h','b'),
271 /*7.0*/ HB_SCRIPT_DUPLOYAN = HB_TAG ('D','u','p','l'),
272 /*7.0*/ HB_SCRIPT_ELBASAN = HB_TAG ('E','l','b','a'),
273 /*7.0*/ HB_SCRIPT_GRANTHA = HB_TAG ('G','r','a','n'),
274 /*7.0*/ HB_SCRIPT_KHOJKI = HB_TAG ('K','h','o','j'),
275 /*7.0*/ HB_SCRIPT_KHUDAWADI = HB_TAG ('S','i','n','d'),
276 /*7.0*/ HB_SCRIPT_LINEAR_A = HB_TAG ('L','i','n','a'),
277 /*7.0*/ HB_SCRIPT_MAHAJANI = HB_TAG ('M','a','h','j'),
278 /*7.0*/ HB_SCRIPT_MANICHAEAN = HB_TAG ('M','a','n','i'),
279 /*7.0*/ HB_SCRIPT_MENDE_KIKAKUI = HB_TAG ('M','e','n','d'),
280 /*7.0*/ HB_SCRIPT_MODI = HB_TAG ('M','o','d','i'),
281 /*7.0*/ HB_SCRIPT_MRO = HB_TAG ('M','r','o','o'),
282 /*7.0*/ HB_SCRIPT_NABATAEAN = HB_TAG ('N','b','a','t'),
283 /*7.0*/ HB_SCRIPT_OLD_NORTH_ARABIAN = HB_TAG ('N','a','r','b'),
284 /*7.0*/ HB_SCRIPT_OLD_PERMIC = HB_TAG ('P','e','r','m'),
285 /*7.0*/ HB_SCRIPT_PAHAWH_HMONG = HB_TAG ('H','m','n','g'),
286 /*7.0*/ HB_SCRIPT_PALMYRENE = HB_TAG ('P','a','l','m'),
287 /*7.0*/ HB_SCRIPT_PAU_CIN_HAU = HB_TAG ('P','a','u','c'),
288 /*7.0*/ HB_SCRIPT_PSALTER_PAHLAVI = HB_TAG ('P','h','l','p'),
289 /*7.0*/ HB_SCRIPT_SIDDHAM = HB_TAG ('S','i','d','d'),
290 /*7.0*/ HB_SCRIPT_TIRHUTA = HB_TAG ('T','i','r','h'),
291 /*7.0*/ HB_SCRIPT_WARANG_CITI = HB_TAG ('W','a','r','a'),
292
293 /*8.0*/ HB_SCRIPT_AHOM = HB_TAG ('A','h','o','m'),
294 /*8.0*/ HB_SCRIPT_ANATOLIAN_HIEROGLYPHS = HB_TAG ('H','l','u','w'),
295 /*8.0*/ HB_SCRIPT_HATRAN = HB_TAG ('H','a','t','r'),
296 /*8.0*/ HB_SCRIPT_MULTANI = HB_TAG ('M','u','l','t'),
297 /*8.0*/ HB_SCRIPT_OLD_HUNGARIAN = HB_TAG ('H','u','n','g'),
298 /*8.0*/ HB_SCRIPT_SIGNWRITING = HB_TAG ('S','g','n','w'),
299
300 /*
301 * Since 1.3.0
302 */
303 /*9.0*/ HB_SCRIPT_ADLAM = HB_TAG ('A','d','l','m'),
304 /*9.0*/ HB_SCRIPT_BHAIKSUKI = HB_TAG ('B','h','k','s'),
305 /*9.0*/ HB_SCRIPT_MARCHEN = HB_TAG ('M','a','r','c'),
306 /*9.0*/ HB_SCRIPT_OSAGE = HB_TAG ('O','s','g','e'),
307 /*9.0*/ HB_SCRIPT_TANGUT = HB_TAG ('T','a','n','g'),
308 /*9.0*/ HB_SCRIPT_NEWA = HB_TAG ('N','e','w','a'),
309
310 /*
311 * Since 1.6.0
312 */
313 /*10.0*/HB_SCRIPT_MASARAM_GONDI = HB_TAG ('G','o','n','m'),
314 /*10.0*/HB_SCRIPT_NUSHU = HB_TAG ('N','s','h','u'),
315 /*10.0*/HB_SCRIPT_SOYOMBO = HB_TAG ('S','o','y','o'),
316 /*10.0*/HB_SCRIPT_ZANABAZAR_SQUARE = HB_TAG ('Z','a','n','b'),
317
318 /* No script set. */
319 HB_SCRIPT_INVALID = HB_TAG_NONE,
320
321 /* Dummy values to ensure any hb_tag_t value can be passed/stored as hb_script_t
322 * without risking undefined behavior. Include both a signed and unsigned max,
323 * since technically enums are int, and indeed, hb_script_t ends up being signed.
324 * See this thread for technicalities:
325 *
326 * http://lists.freedesktop.org/archives/harfbuzz/2014-March/004150.html
327 */
328 _HB_SCRIPT_MAX_VALUE = HB_TAG_MAX, /*< skip >*/
329 _HB_SCRIPT_MAX_VALUE_SIGNED = HB_TAG_MAX_SIGNED /*< skip >*/
330
331 } hb_script_t;
332
333
334 /* Script functions */
335
336 HB_EXTERN hb_script_t
337 hb_script_from_iso15924_tag (hb_tag_t tag);
338
339 HB_EXTERN hb_script_t
340 hb_script_from_string (const char *str, int len);
341
342 HB_EXTERN hb_tag_t
343 hb_script_to_iso15924_tag (hb_script_t script);
344
345 HB_EXTERN hb_direction_t
346 hb_script_get_horizontal_direction (hb_script_t script);
347
348
349 /* User data */
350
351 typedef struct hb_user_data_key_t {
352 /*< private >*/
353 char unused;
354 } hb_user_data_key_t;
355
356 typedef void (*hb_destroy_func_t) (void *user_data);
357
358
359 /* Font features and variations. */
360
361 typedef struct hb_feature_t {
362 hb_tag_t tag;
363 uint32_t value;
364 unsigned int start;
365 unsigned int end;
366 } hb_feature_t;
367
368 HB_EXTERN hb_bool_t
369 hb_feature_from_string (const char *str, int len,
370 hb_feature_t *feature);
371
372 HB_EXTERN void
373 hb_feature_to_string (hb_feature_t *feature,
374 char *buf, unsigned int size);
375
376 /**
377 * hb_variation_t:
378 *
379 * Since: 1.4.2
380 */
381 typedef struct hb_variation_t {
382 hb_tag_t tag;
383 float value;
384 } hb_variation_t;
385
386 HB_EXTERN hb_bool_t
387 hb_variation_from_string (const char *str, int len,
388 hb_variation_t *variation);
389
390 HB_EXTERN void
391 hb_variation_to_string (hb_variation_t *variation,
392 char *buf, unsigned int size);
393
394
395 HB_END_DECLS
396
397 #endif /* HB_COMMON_H */