• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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_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 */
58 typedef __int8 int8_t;
59 typedef unsigned __int8 uint8_t;
60 typedef __int16 int16_t;
61 typedef unsigned __int16 uint16_t;
62 typedef __int32 int32_t;
63 typedef unsigned __int32 uint32_t;
64 typedef __int64 int64_t;
65 typedef unsigned __int64 uint64_t;
66 #else
67 #  include <stdint.h>
68 #endif
69 
70 #if    __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1)
71 #define HB_DEPRECATED __attribute__((__deprecated__))
72 #elif defined(_MSC_VER) && (_MSC_VER >= 1300)
73 #define HB_DEPRECATED __declspec(deprecated)
74 #else
75 #define HB_DEPRECATED
76 #endif
77 
78 #if    __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)
79 #define HB_DEPRECATED_FOR(f) __attribute__((__deprecated__("Use '" #f "' instead")))
80 #elif defined(_MSC_FULL_VER) && (_MSC_FULL_VER > 140050320)
81 #define HB_DEPRECATED_FOR(f) __declspec(deprecated("is deprecated. Use '" #f "' instead"))
82 #else
83 #define HB_DEPRECATED_FOR(f) HB_DEPRECATED
84 #endif
85 
86 
87 HB_BEGIN_DECLS
88 
89 
90 typedef int hb_bool_t;
91 
92 typedef uint32_t hb_codepoint_t;
93 typedef int32_t hb_position_t;
94 typedef uint32_t hb_mask_t;
95 
96 typedef union _hb_var_int_t {
97   uint32_t u32;
98   int32_t i32;
99   uint16_t u16[2];
100   int16_t i16[2];
101   uint8_t u8[4];
102   int8_t i8[4];
103 } hb_var_int_t;
104 
105 
106 /* hb_tag_t */
107 
108 typedef uint32_t hb_tag_t;
109 
110 #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)))
111 #define HB_UNTAG(tag)   (((tag)>>24)&0xFF), (((tag)>>16)&0xFF), (((tag)>>8)&0xFF), ((tag)&0xFF)
112 
113 #define HB_TAG_NONE HB_TAG(0,0,0,0)
114 #define HB_TAG_MAX HB_TAG(0xff,0xff,0xff,0xff)
115 #define HB_TAG_MAX_SIGNED HB_TAG(0x7f,0xff,0xff,0xff)
116 
117 /* len=-1 means str is NUL-terminated. */
118 HB_EXTERN hb_tag_t
119 hb_tag_from_string (const char *str, int len);
120 
121 /* buf should have 4 bytes. */
122 HB_EXTERN void
123 hb_tag_to_string (hb_tag_t tag, char *buf);
124 
125 
126 /**
127  * hb_direction_t:
128  * @HB_DIRECTION_INVALID: Initial, unset direction.
129  * @HB_DIRECTION_LTR: Text is set horizontally from left to right.
130  * @HB_DIRECTION_RTL: Text is set horizontally from right to left.
131  * @HB_DIRECTION_TTB: Text is set vertically from top to bottom.
132  * @HB_DIRECTION_BTT: Text is set vertically from bottom to top.
133  */
134 typedef enum {
135   HB_DIRECTION_INVALID = 0,
136   HB_DIRECTION_LTR = 4,
137   HB_DIRECTION_RTL,
138   HB_DIRECTION_TTB,
139   HB_DIRECTION_BTT
140 } hb_direction_t;
141 
142 /* len=-1 means str is NUL-terminated */
143 HB_EXTERN hb_direction_t
144 hb_direction_from_string (const char *str, int len);
145 
146 HB_EXTERN const char *
147 hb_direction_to_string (hb_direction_t direction);
148 
149 #define HB_DIRECTION_IS_VALID(dir)	((((unsigned int) (dir)) & ~3U) == 4)
150 /* Direction must be valid for the following */
151 #define HB_DIRECTION_IS_HORIZONTAL(dir)	((((unsigned int) (dir)) & ~1U) == 4)
152 #define HB_DIRECTION_IS_VERTICAL(dir)	((((unsigned int) (dir)) & ~1U) == 6)
153 #define HB_DIRECTION_IS_FORWARD(dir)	((((unsigned int) (dir)) & ~2U) == 4)
154 #define HB_DIRECTION_IS_BACKWARD(dir)	((((unsigned int) (dir)) & ~2U) == 5)
155 #define HB_DIRECTION_REVERSE(dir)	((hb_direction_t) (((unsigned int) (dir)) ^ 1))
156 
157 
158 /* hb_language_t */
159 
160 typedef const struct hb_language_impl_t *hb_language_t;
161 
162 HB_EXTERN hb_language_t
163 hb_language_from_string (const char *str, int len);
164 
165 HB_EXTERN const char *
166 hb_language_to_string (hb_language_t language);
167 
168 #define HB_LANGUAGE_INVALID ((hb_language_t) 0)
169 
170 HB_EXTERN hb_language_t
171 hb_language_get_default (void);
172 
173 
174 /* hb_script_t */
175 
176 /* https://unicode.org/iso15924/ */
177 /* https://docs.google.com/spreadsheets/d/1Y90M0Ie3MUJ6UVCRDOypOtijlMDLNNyyLk36T6iMu0o */
178 /* Unicode Character Database property: Script (sc) */
179 typedef enum
180 {
181   /*1.1*/ HB_SCRIPT_COMMON			= HB_TAG ('Z','y','y','y'),
182   /*1.1*/ HB_SCRIPT_INHERITED			= HB_TAG ('Z','i','n','h'),
183   /*5.0*/ HB_SCRIPT_UNKNOWN			= HB_TAG ('Z','z','z','z'),
184 
185   /*1.1*/ HB_SCRIPT_ARABIC			= HB_TAG ('A','r','a','b'),
186   /*1.1*/ HB_SCRIPT_ARMENIAN			= HB_TAG ('A','r','m','n'),
187   /*1.1*/ HB_SCRIPT_BENGALI			= HB_TAG ('B','e','n','g'),
188   /*1.1*/ HB_SCRIPT_CYRILLIC			= HB_TAG ('C','y','r','l'),
189   /*1.1*/ HB_SCRIPT_DEVANAGARI			= HB_TAG ('D','e','v','a'),
190   /*1.1*/ HB_SCRIPT_GEORGIAN			= HB_TAG ('G','e','o','r'),
191   /*1.1*/ HB_SCRIPT_GREEK			= HB_TAG ('G','r','e','k'),
192   /*1.1*/ HB_SCRIPT_GUJARATI			= HB_TAG ('G','u','j','r'),
193   /*1.1*/ HB_SCRIPT_GURMUKHI			= HB_TAG ('G','u','r','u'),
194   /*1.1*/ HB_SCRIPT_HANGUL			= HB_TAG ('H','a','n','g'),
195   /*1.1*/ HB_SCRIPT_HAN				= HB_TAG ('H','a','n','i'),
196   /*1.1*/ HB_SCRIPT_HEBREW			= HB_TAG ('H','e','b','r'),
197   /*1.1*/ HB_SCRIPT_HIRAGANA			= HB_TAG ('H','i','r','a'),
198   /*1.1*/ HB_SCRIPT_KANNADA			= HB_TAG ('K','n','d','a'),
199   /*1.1*/ HB_SCRIPT_KATAKANA			= HB_TAG ('K','a','n','a'),
200   /*1.1*/ HB_SCRIPT_LAO				= HB_TAG ('L','a','o','o'),
201   /*1.1*/ HB_SCRIPT_LATIN			= HB_TAG ('L','a','t','n'),
202   /*1.1*/ HB_SCRIPT_MALAYALAM			= HB_TAG ('M','l','y','m'),
203   /*1.1*/ HB_SCRIPT_ORIYA			= HB_TAG ('O','r','y','a'),
204   /*1.1*/ HB_SCRIPT_TAMIL			= HB_TAG ('T','a','m','l'),
205   /*1.1*/ HB_SCRIPT_TELUGU			= HB_TAG ('T','e','l','u'),
206   /*1.1*/ HB_SCRIPT_THAI			= HB_TAG ('T','h','a','i'),
207 
208   /*2.0*/ HB_SCRIPT_TIBETAN			= HB_TAG ('T','i','b','t'),
209 
210   /*3.0*/ HB_SCRIPT_BOPOMOFO			= HB_TAG ('B','o','p','o'),
211   /*3.0*/ HB_SCRIPT_BRAILLE			= HB_TAG ('B','r','a','i'),
212   /*3.0*/ HB_SCRIPT_CANADIAN_SYLLABICS		= HB_TAG ('C','a','n','s'),
213   /*3.0*/ HB_SCRIPT_CHEROKEE			= HB_TAG ('C','h','e','r'),
214   /*3.0*/ HB_SCRIPT_ETHIOPIC			= HB_TAG ('E','t','h','i'),
215   /*3.0*/ HB_SCRIPT_KHMER			= HB_TAG ('K','h','m','r'),
216   /*3.0*/ HB_SCRIPT_MONGOLIAN			= HB_TAG ('M','o','n','g'),
217   /*3.0*/ HB_SCRIPT_MYANMAR			= HB_TAG ('M','y','m','r'),
218   /*3.0*/ HB_SCRIPT_OGHAM			= HB_TAG ('O','g','a','m'),
219   /*3.0*/ HB_SCRIPT_RUNIC			= HB_TAG ('R','u','n','r'),
220   /*3.0*/ HB_SCRIPT_SINHALA			= HB_TAG ('S','i','n','h'),
221   /*3.0*/ HB_SCRIPT_SYRIAC			= HB_TAG ('S','y','r','c'),
222   /*3.0*/ HB_SCRIPT_THAANA			= HB_TAG ('T','h','a','a'),
223   /*3.0*/ HB_SCRIPT_YI				= HB_TAG ('Y','i','i','i'),
224 
225   /*3.1*/ HB_SCRIPT_DESERET			= HB_TAG ('D','s','r','t'),
226   /*3.1*/ HB_SCRIPT_GOTHIC			= HB_TAG ('G','o','t','h'),
227   /*3.1*/ HB_SCRIPT_OLD_ITALIC			= HB_TAG ('I','t','a','l'),
228 
229   /*3.2*/ HB_SCRIPT_BUHID			= HB_TAG ('B','u','h','d'),
230   /*3.2*/ HB_SCRIPT_HANUNOO			= HB_TAG ('H','a','n','o'),
231   /*3.2*/ HB_SCRIPT_TAGALOG			= HB_TAG ('T','g','l','g'),
232   /*3.2*/ HB_SCRIPT_TAGBANWA			= HB_TAG ('T','a','g','b'),
233 
234   /*4.0*/ HB_SCRIPT_CYPRIOT			= HB_TAG ('C','p','r','t'),
235   /*4.0*/ HB_SCRIPT_LIMBU			= HB_TAG ('L','i','m','b'),
236   /*4.0*/ HB_SCRIPT_LINEAR_B			= HB_TAG ('L','i','n','b'),
237   /*4.0*/ HB_SCRIPT_OSMANYA			= HB_TAG ('O','s','m','a'),
238   /*4.0*/ HB_SCRIPT_SHAVIAN			= HB_TAG ('S','h','a','w'),
239   /*4.0*/ HB_SCRIPT_TAI_LE			= HB_TAG ('T','a','l','e'),
240   /*4.0*/ HB_SCRIPT_UGARITIC			= HB_TAG ('U','g','a','r'),
241 
242   /*4.1*/ HB_SCRIPT_BUGINESE			= HB_TAG ('B','u','g','i'),
243   /*4.1*/ HB_SCRIPT_COPTIC			= HB_TAG ('C','o','p','t'),
244   /*4.1*/ HB_SCRIPT_GLAGOLITIC			= HB_TAG ('G','l','a','g'),
245   /*4.1*/ HB_SCRIPT_KHAROSHTHI			= HB_TAG ('K','h','a','r'),
246   /*4.1*/ HB_SCRIPT_NEW_TAI_LUE			= HB_TAG ('T','a','l','u'),
247   /*4.1*/ HB_SCRIPT_OLD_PERSIAN			= HB_TAG ('X','p','e','o'),
248   /*4.1*/ HB_SCRIPT_SYLOTI_NAGRI		= HB_TAG ('S','y','l','o'),
249   /*4.1*/ HB_SCRIPT_TIFINAGH			= HB_TAG ('T','f','n','g'),
250 
251   /*5.0*/ HB_SCRIPT_BALINESE			= HB_TAG ('B','a','l','i'),
252   /*5.0*/ HB_SCRIPT_CUNEIFORM			= HB_TAG ('X','s','u','x'),
253   /*5.0*/ HB_SCRIPT_NKO				= HB_TAG ('N','k','o','o'),
254   /*5.0*/ HB_SCRIPT_PHAGS_PA			= HB_TAG ('P','h','a','g'),
255   /*5.0*/ HB_SCRIPT_PHOENICIAN			= HB_TAG ('P','h','n','x'),
256 
257   /*5.1*/ HB_SCRIPT_CARIAN			= HB_TAG ('C','a','r','i'),
258   /*5.1*/ HB_SCRIPT_CHAM			= HB_TAG ('C','h','a','m'),
259   /*5.1*/ HB_SCRIPT_KAYAH_LI			= HB_TAG ('K','a','l','i'),
260   /*5.1*/ HB_SCRIPT_LEPCHA			= HB_TAG ('L','e','p','c'),
261   /*5.1*/ HB_SCRIPT_LYCIAN			= HB_TAG ('L','y','c','i'),
262   /*5.1*/ HB_SCRIPT_LYDIAN			= HB_TAG ('L','y','d','i'),
263   /*5.1*/ HB_SCRIPT_OL_CHIKI			= HB_TAG ('O','l','c','k'),
264   /*5.1*/ HB_SCRIPT_REJANG			= HB_TAG ('R','j','n','g'),
265   /*5.1*/ HB_SCRIPT_SAURASHTRA			= HB_TAG ('S','a','u','r'),
266   /*5.1*/ HB_SCRIPT_SUNDANESE			= HB_TAG ('S','u','n','d'),
267   /*5.1*/ HB_SCRIPT_VAI				= HB_TAG ('V','a','i','i'),
268 
269   /*5.2*/ HB_SCRIPT_AVESTAN			= HB_TAG ('A','v','s','t'),
270   /*5.2*/ HB_SCRIPT_BAMUM			= HB_TAG ('B','a','m','u'),
271   /*5.2*/ HB_SCRIPT_EGYPTIAN_HIEROGLYPHS	= HB_TAG ('E','g','y','p'),
272   /*5.2*/ HB_SCRIPT_IMPERIAL_ARAMAIC		= HB_TAG ('A','r','m','i'),
273   /*5.2*/ HB_SCRIPT_INSCRIPTIONAL_PAHLAVI	= HB_TAG ('P','h','l','i'),
274   /*5.2*/ HB_SCRIPT_INSCRIPTIONAL_PARTHIAN	= HB_TAG ('P','r','t','i'),
275   /*5.2*/ HB_SCRIPT_JAVANESE			= HB_TAG ('J','a','v','a'),
276   /*5.2*/ HB_SCRIPT_KAITHI			= HB_TAG ('K','t','h','i'),
277   /*5.2*/ HB_SCRIPT_LISU			= HB_TAG ('L','i','s','u'),
278   /*5.2*/ HB_SCRIPT_MEETEI_MAYEK		= HB_TAG ('M','t','e','i'),
279   /*5.2*/ HB_SCRIPT_OLD_SOUTH_ARABIAN		= HB_TAG ('S','a','r','b'),
280   /*5.2*/ HB_SCRIPT_OLD_TURKIC			= HB_TAG ('O','r','k','h'),
281   /*5.2*/ HB_SCRIPT_SAMARITAN			= HB_TAG ('S','a','m','r'),
282   /*5.2*/ HB_SCRIPT_TAI_THAM			= HB_TAG ('L','a','n','a'),
283   /*5.2*/ HB_SCRIPT_TAI_VIET			= HB_TAG ('T','a','v','t'),
284 
285   /*6.0*/ HB_SCRIPT_BATAK			= HB_TAG ('B','a','t','k'),
286   /*6.0*/ HB_SCRIPT_BRAHMI			= HB_TAG ('B','r','a','h'),
287   /*6.0*/ HB_SCRIPT_MANDAIC			= HB_TAG ('M','a','n','d'),
288 
289   /*6.1*/ HB_SCRIPT_CHAKMA			= HB_TAG ('C','a','k','m'),
290   /*6.1*/ HB_SCRIPT_MEROITIC_CURSIVE		= HB_TAG ('M','e','r','c'),
291   /*6.1*/ HB_SCRIPT_MEROITIC_HIEROGLYPHS	= HB_TAG ('M','e','r','o'),
292   /*6.1*/ HB_SCRIPT_MIAO			= HB_TAG ('P','l','r','d'),
293   /*6.1*/ HB_SCRIPT_SHARADA			= HB_TAG ('S','h','r','d'),
294   /*6.1*/ HB_SCRIPT_SORA_SOMPENG		= HB_TAG ('S','o','r','a'),
295   /*6.1*/ HB_SCRIPT_TAKRI			= HB_TAG ('T','a','k','r'),
296 
297   /*
298    * Since: 0.9.30
299    */
300   /*7.0*/ HB_SCRIPT_BASSA_VAH			= HB_TAG ('B','a','s','s'),
301   /*7.0*/ HB_SCRIPT_CAUCASIAN_ALBANIAN		= HB_TAG ('A','g','h','b'),
302   /*7.0*/ HB_SCRIPT_DUPLOYAN			= HB_TAG ('D','u','p','l'),
303   /*7.0*/ HB_SCRIPT_ELBASAN			= HB_TAG ('E','l','b','a'),
304   /*7.0*/ HB_SCRIPT_GRANTHA			= HB_TAG ('G','r','a','n'),
305   /*7.0*/ HB_SCRIPT_KHOJKI			= HB_TAG ('K','h','o','j'),
306   /*7.0*/ HB_SCRIPT_KHUDAWADI			= HB_TAG ('S','i','n','d'),
307   /*7.0*/ HB_SCRIPT_LINEAR_A			= HB_TAG ('L','i','n','a'),
308   /*7.0*/ HB_SCRIPT_MAHAJANI			= HB_TAG ('M','a','h','j'),
309   /*7.0*/ HB_SCRIPT_MANICHAEAN			= HB_TAG ('M','a','n','i'),
310   /*7.0*/ HB_SCRIPT_MENDE_KIKAKUI		= HB_TAG ('M','e','n','d'),
311   /*7.0*/ HB_SCRIPT_MODI			= HB_TAG ('M','o','d','i'),
312   /*7.0*/ HB_SCRIPT_MRO				= HB_TAG ('M','r','o','o'),
313   /*7.0*/ HB_SCRIPT_NABATAEAN			= HB_TAG ('N','b','a','t'),
314   /*7.0*/ HB_SCRIPT_OLD_NORTH_ARABIAN		= HB_TAG ('N','a','r','b'),
315   /*7.0*/ HB_SCRIPT_OLD_PERMIC			= HB_TAG ('P','e','r','m'),
316   /*7.0*/ HB_SCRIPT_PAHAWH_HMONG		= HB_TAG ('H','m','n','g'),
317   /*7.0*/ HB_SCRIPT_PALMYRENE			= HB_TAG ('P','a','l','m'),
318   /*7.0*/ HB_SCRIPT_PAU_CIN_HAU			= HB_TAG ('P','a','u','c'),
319   /*7.0*/ HB_SCRIPT_PSALTER_PAHLAVI		= HB_TAG ('P','h','l','p'),
320   /*7.0*/ HB_SCRIPT_SIDDHAM			= HB_TAG ('S','i','d','d'),
321   /*7.0*/ HB_SCRIPT_TIRHUTA			= HB_TAG ('T','i','r','h'),
322   /*7.0*/ HB_SCRIPT_WARANG_CITI			= HB_TAG ('W','a','r','a'),
323 
324   /*8.0*/ HB_SCRIPT_AHOM			= HB_TAG ('A','h','o','m'),
325   /*8.0*/ HB_SCRIPT_ANATOLIAN_HIEROGLYPHS	= HB_TAG ('H','l','u','w'),
326   /*8.0*/ HB_SCRIPT_HATRAN			= HB_TAG ('H','a','t','r'),
327   /*8.0*/ HB_SCRIPT_MULTANI			= HB_TAG ('M','u','l','t'),
328   /*8.0*/ HB_SCRIPT_OLD_HUNGARIAN		= HB_TAG ('H','u','n','g'),
329   /*8.0*/ HB_SCRIPT_SIGNWRITING			= HB_TAG ('S','g','n','w'),
330 
331   /*
332    * Since 1.3.0
333    */
334   /*9.0*/ HB_SCRIPT_ADLAM			= HB_TAG ('A','d','l','m'),
335   /*9.0*/ HB_SCRIPT_BHAIKSUKI			= HB_TAG ('B','h','k','s'),
336   /*9.0*/ HB_SCRIPT_MARCHEN			= HB_TAG ('M','a','r','c'),
337   /*9.0*/ HB_SCRIPT_OSAGE			= HB_TAG ('O','s','g','e'),
338   /*9.0*/ HB_SCRIPT_TANGUT			= HB_TAG ('T','a','n','g'),
339   /*9.0*/ HB_SCRIPT_NEWA			= HB_TAG ('N','e','w','a'),
340 
341   /*
342    * Since 1.6.0
343    */
344   /*10.0*/HB_SCRIPT_MASARAM_GONDI		= HB_TAG ('G','o','n','m'),
345   /*10.0*/HB_SCRIPT_NUSHU			= HB_TAG ('N','s','h','u'),
346   /*10.0*/HB_SCRIPT_SOYOMBO			= HB_TAG ('S','o','y','o'),
347   /*10.0*/HB_SCRIPT_ZANABAZAR_SQUARE		= HB_TAG ('Z','a','n','b'),
348 
349   /*
350    * Since 1.8.0
351    */
352   /*11.0*/HB_SCRIPT_DOGRA			= HB_TAG ('D','o','g','r'),
353   /*11.0*/HB_SCRIPT_GUNJALA_GONDI		= HB_TAG ('G','o','n','g'),
354   /*11.0*/HB_SCRIPT_HANIFI_ROHINGYA		= HB_TAG ('R','o','h','g'),
355   /*11.0*/HB_SCRIPT_MAKASAR			= HB_TAG ('M','a','k','a'),
356   /*11.0*/HB_SCRIPT_MEDEFAIDRIN			= HB_TAG ('M','e','d','f'),
357   /*11.0*/HB_SCRIPT_OLD_SOGDIAN			= HB_TAG ('S','o','g','o'),
358   /*11.0*/HB_SCRIPT_SOGDIAN			= HB_TAG ('S','o','g','d'),
359 
360   /* No script set. */
361   HB_SCRIPT_INVALID				= HB_TAG_NONE,
362 
363   /* Dummy values to ensure any hb_tag_t value can be passed/stored as hb_script_t
364    * without risking undefined behavior.  We have two, for historical reasons.
365    * HB_TAG_MAX used to be unsigned, but that was invalid Ansi C, so was changed
366    * to _HB_SCRIPT_MAX_VALUE to be equal to HB_TAG_MAX_SIGNED as well.
367    *
368    * See this thread for technicalities:
369    *
370    *   https://lists.freedesktop.org/archives/harfbuzz/2014-March/004150.html
371    */
372   _HB_SCRIPT_MAX_VALUE				= HB_TAG_MAX_SIGNED, /*< skip >*/
373   _HB_SCRIPT_MAX_VALUE_SIGNED			= HB_TAG_MAX_SIGNED /*< skip >*/
374 
375 } hb_script_t;
376 
377 
378 /* Script functions */
379 
380 HB_EXTERN hb_script_t
381 hb_script_from_iso15924_tag (hb_tag_t tag);
382 
383 HB_EXTERN hb_script_t
384 hb_script_from_string (const char *str, int len);
385 
386 HB_EXTERN hb_tag_t
387 hb_script_to_iso15924_tag (hb_script_t script);
388 
389 HB_EXTERN hb_direction_t
390 hb_script_get_horizontal_direction (hb_script_t script);
391 
392 
393 /* User data */
394 
395 typedef struct hb_user_data_key_t {
396   /*< private >*/
397   char unused;
398 } hb_user_data_key_t;
399 
400 typedef void (*hb_destroy_func_t) (void *user_data);
401 
402 
403 /* Font features and variations. */
404 
405 /**
406  * HB_FEATURE_GLOBAL_START
407  *
408  * Since: 2.0.0
409  */
410 #define HB_FEATURE_GLOBAL_START	0
411 /**
412  * HB_FEATURE_GLOBAL_END
413  *
414  * Since: 2.0.0
415  */
416 #define HB_FEATURE_GLOBAL_END	((unsigned int) -1)
417 
418 typedef struct hb_feature_t {
419   hb_tag_t      tag;
420   uint32_t      value;
421   unsigned int  start;
422   unsigned int  end;
423 } hb_feature_t;
424 
425 HB_EXTERN hb_bool_t
426 hb_feature_from_string (const char *str, int len,
427 			hb_feature_t *feature);
428 
429 HB_EXTERN void
430 hb_feature_to_string (hb_feature_t *feature,
431 		      char *buf, unsigned int size);
432 
433 /**
434  * hb_variation_t:
435  *
436  * Since: 1.4.2
437  */
438 typedef struct hb_variation_t {
439   hb_tag_t tag;
440   float    value;
441 } hb_variation_t;
442 
443 HB_EXTERN hb_bool_t
444 hb_variation_from_string (const char *str, int len,
445 			  hb_variation_t *variation);
446 
447 HB_EXTERN void
448 hb_variation_to_string (hb_variation_t *variation,
449 			char *buf, unsigned int size);
450 
451 /**
452  * hb_color_t:
453  *
454  * Data type for holding color values.
455  *
456  * Since: 2.1.0
457  */
458 typedef uint32_t hb_color_t;
459 
460 #define HB_COLOR(b,g,r,a) ((hb_color_t) HB_TAG ((b),(g),(r),(a)))
461 
462 /**
463  * hb_color_get_alpha:
464  *
465  *
466  *
467  * Since: 2.1.0
468  */
469 #define hb_color_get_alpha(color)	((color) & 0xFF)
470 /**
471  * hb_color_get_red:
472  *
473  *
474  *
475  * Since: 2.1.0
476  */
477 #define hb_color_get_red(color)		(((color) >> 8) & 0xFF)
478 /**
479  * hb_color_get_green:
480  *
481  *
482  *
483  * Since: 2.1.0
484  */
485 #define hb_color_get_green(color)	(((color) >> 16) & 0xFF)
486 /**
487  * hb_color_get_blue:
488  *
489  *
490  *
491  * Since: 2.1.0
492  */
493 #define hb_color_get_blue(color)	(((color) >> 24) & 0xFF)
494 
495 
496 HB_END_DECLS
497 
498 #endif /* HB_COMMON_H */
499