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| 1 /* | |
| 2 * Copyright (C) 1998-2004 David Turner and Werner Lemberg | |
| 3 * Copyright (C) 2006 Behdad Esfahbod | |
| 4 * | |
| 5 * This is part of HarfBuzz, an OpenType Layout engine 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 | |
| 26 #ifndef HARFBUZZ_OPEN_H | |
| 27 #define HARFBUZZ_OPEN_H | |
| 28 | |
| 29 #include "harfbuzz-global.h" | |
| 30 | |
| 31 HB_BEGIN_HEADER | |
| 32 | |
| 33 #ifdef HB_USE_PACKED_STRUCTS | |
| 34 #pragma pack(push, 1) | |
| 35 #endif | |
| 36 | |
| 37 /* Use this if a feature applies to all glyphs */ | |
| 38 #define HB_ALL_GLYPHS 0xFFFF | |
| 39 | |
| 40 #define HB_DEFAULT_LANGUAGE 0xFFFF | |
| 41 | |
| 42 #define HB_MAX_NESTING_LEVEL 100 | |
| 43 | |
| 44 | |
| 45 /* Script list related structures */ | |
| 46 | |
| 47 struct HB_LangSys_ | |
| 48 { | |
| 49 HB_UShort* FeatureIndex; /* array of Feature indices */ | |
| 50 HB_UShort LookupOrderOffset; /* always 0 for TT Open 1.0 */ | |
| 51 HB_UShort ReqFeatureIndex; /* required FeatureIndex */ | |
| 52 HB_UShort FeatureCount; /* number of Feature indices */ | |
| 53 }; | |
| 54 | |
| 55 typedef struct HB_LangSys_ HB_LangSys; | |
| 56 | |
| 57 | |
| 58 struct HB_LangSysRecord_ | |
| 59 { | |
| 60 HB_LangSys LangSys; /* LangSys table */ | |
| 61 HB_UInt LangSysTag; /* LangSysTag identifier */ | |
| 62 }; | |
| 63 | |
| 64 typedef struct HB_LangSysRecord_ HB_LangSysRecord; | |
| 65 | |
| 66 | |
| 67 struct HB_ScriptTable_ | |
| 68 { | |
| 69 HB_LangSysRecord* LangSysRecord; /* array of LangSysRecords */ | |
| 70 HB_LangSys DefaultLangSys; /* DefaultLangSys table */ | |
| 71 HB_UShort LangSysCount; /* number of LangSysRecords */ | |
| 72 }; | |
| 73 | |
| 74 typedef struct HB_ScriptTable_ HB_ScriptTable; | |
| 75 | |
| 76 | |
| 77 struct HB_ScriptRecord_ | |
| 78 { | |
| 79 HB_UInt ScriptTag; /* ScriptTag identifier */ | |
| 80 HB_ScriptTable Script; /* Script table */ | |
| 81 }; | |
| 82 | |
| 83 typedef struct HB_ScriptRecord_ HB_ScriptRecord; | |
| 84 | |
| 85 | |
| 86 struct HB_ScriptList_ | |
| 87 { | |
| 88 HB_ScriptRecord* ScriptRecord; /* array of ScriptRecords */ | |
| 89 HB_UShort ScriptCount; /* number of ScriptRecords */ | |
| 90 }; | |
| 91 | |
| 92 typedef struct HB_ScriptList_ HB_ScriptList; | |
| 93 | |
| 94 | |
| 95 /* Feature list related structures */ | |
| 96 | |
| 97 struct HB_Feature_ | |
| 98 { | |
| 99 HB_UShort* LookupListIndex; /* array of LookupList indices */ | |
| 100 HB_UShort FeatureParams; /* always 0 for TT Open 1.0 */ | |
| 101 HB_UShort LookupListCount; /* number of LookupList indices */ | |
| 102 }; | |
| 103 | |
| 104 typedef struct HB_Feature_ HB_Feature; | |
| 105 | |
| 106 | |
| 107 struct HB_FeatureRecord_ | |
| 108 { | |
| 109 HB_UInt FeatureTag; /* FeatureTag identifier */ | |
| 110 HB_Feature Feature; /* Feature table */ | |
| 111 }; | |
| 112 | |
| 113 typedef struct HB_FeatureRecord_ HB_FeatureRecord; | |
| 114 | |
| 115 | |
| 116 struct HB_FeatureList_ | |
| 117 { | |
| 118 HB_UShort* ApplyOrder; /* order to apply features */ | |
| 119 HB_FeatureRecord* FeatureRecord; /* array of FeatureRecords */ | |
| 120 HB_UShort FeatureCount; /* number of FeatureRecords */ | |
| 121 HB_UShort ApplyCount; /* number of elements in ApplyOrder */ | |
| 122 }; | |
| 123 | |
| 124 typedef struct HB_FeatureList_ HB_FeatureList; | |
| 125 | |
| 126 | |
| 127 /* Lookup list related structures */ | |
| 128 | |
| 129 typedef struct HB_SubTable_ HB_SubTable; | |
| 130 | |
| 131 | |
| 132 struct HB_Lookup_ | |
| 133 { | |
| 134 HB_SubTable* SubTable; /* array of SubTables */ | |
| 135 HB_UShort LookupType; /* Lookup type */ | |
| 136 HB_UShort LookupFlag; /* Lookup qualifiers */ | |
| 137 HB_UShort SubTableCount; /* number of SubTables */ | |
| 138 }; | |
| 139 | |
| 140 typedef struct HB_Lookup_ HB_Lookup; | |
| 141 | |
| 142 | |
| 143 /* The `Properties' field is not defined in the OpenType specification but | |
| 144 is needed for processing lookups. If properties[n] is > 0, the | |
| 145 functions HB_GSUB_Apply_String() resp. HB_GPOS_Apply_String() will | |
| 146 process Lookup[n] for glyphs which have the specific bit not set in | |
| 147 the `properties' field of the input string object. */ | |
| 148 | |
| 149 struct HB_LookupList_ | |
| 150 { | |
| 151 HB_Lookup* Lookup; /* array of Lookup records */ | |
| 152 HB_UInt* Properties; /* array of flags */ | |
| 153 HB_UShort LookupCount; /* number of Lookups */ | |
| 154 }; | |
| 155 | |
| 156 typedef struct HB_LookupList_ HB_LookupList; | |
| 157 | |
| 158 | |
| 159 /* Possible LookupFlag bit masks. `HB_LOOKUP_FLAG_IGNORE_SPECIAL_MARKS' comes f
rom the | |
| 160 OpenType 1.2 specification; HB_LOOKUP_FLAG_RIGHT_TO_LEFT has been (re)introdu
ced in | |
| 161 OpenType 1.3 -- if set, the last glyph in a cursive attachment | |
| 162 sequence has to be positioned on the baseline -- regardless of the | |
| 163 writing direction. */ | |
| 164 | |
| 165 #define HB_LOOKUP_FLAG_RIGHT_TO_LEFT 0x0001 | |
| 166 #define HB_LOOKUP_FLAG_IGNORE_BASE_GLYPHS 0x0002 | |
| 167 #define HB_LOOKUP_FLAG_IGNORE_LIGATURES 0x0004 | |
| 168 #define HB_LOOKUP_FLAG_IGNORE_MARKS 0x0008 | |
| 169 #define HB_LOOKUP_FLAG_IGNORE_SPECIAL_MARKS 0xFF00 | |
| 170 | |
| 171 | |
| 172 struct HB_CoverageFormat1_ | |
| 173 { | |
| 174 HB_UShort* GlyphArray; /* array of glyph IDs */ | |
| 175 HB_UShort GlyphCount; /* number of glyphs in GlyphArray */ | |
| 176 }; | |
| 177 | |
| 178 typedef struct HB_CoverageFormat1_ HB_CoverageFormat1; | |
| 179 | |
| 180 | |
| 181 struct HB_RangeRecord_ | |
| 182 { | |
| 183 HB_UShort Start; /* first glyph ID in the range */ | |
| 184 HB_UShort End; /* last glyph ID in the range */ | |
| 185 HB_UShort StartCoverageIndex; /* coverage index of first | |
| 186 glyph ID in the range */ | |
| 187 }; | |
| 188 | |
| 189 typedef struct HB_RangeRecord_ HB_RangeRecord; | |
| 190 | |
| 191 | |
| 192 struct HB_CoverageFormat2_ | |
| 193 { | |
| 194 HB_RangeRecord* RangeRecord; /* array of RangeRecords */ | |
| 195 HB_UShort RangeCount; /* number of RangeRecords */ | |
| 196 }; | |
| 197 | |
| 198 typedef struct HB_CoverageFormat2_ HB_CoverageFormat2; | |
| 199 | |
| 200 | |
| 201 struct HB_Coverage_ | |
| 202 { | |
| 203 HB_Byte CoverageFormat; /* 1 or 2 */ | |
| 204 | |
| 205 union | |
| 206 { | |
| 207 HB_CoverageFormat1 cf1; | |
| 208 HB_CoverageFormat2 cf2; | |
| 209 } cf; | |
| 210 }; | |
| 211 | |
| 212 typedef struct HB_Coverage_ HB_Coverage; | |
| 213 | |
| 214 | |
| 215 struct HB_ClassDefFormat1_ | |
| 216 { | |
| 217 HB_UShort* ClassValueArray; /* array of class values */ | |
| 218 HB_UShort StartGlyph; /* first glyph ID of the | |
| 219 ClassValueArray */ | |
| 220 HB_UShort GlyphCount; /* size of the ClassValueArray */ | |
| 221 }; | |
| 222 | |
| 223 typedef struct HB_ClassDefFormat1_ HB_ClassDefFormat1; | |
| 224 | |
| 225 | |
| 226 struct HB_ClassRangeRecord_ | |
| 227 { | |
| 228 HB_UShort Start; /* first glyph ID in the range */ | |
| 229 HB_UShort End; /* last glyph ID in the range */ | |
| 230 HB_UShort Class; /* applied to all glyphs in range */ | |
| 231 }; | |
| 232 | |
| 233 typedef struct HB_ClassRangeRecord_ HB_ClassRangeRecord; | |
| 234 | |
| 235 | |
| 236 struct HB_ClassDefFormat2_ | |
| 237 { | |
| 238 HB_ClassRangeRecord* ClassRangeRecord; | |
| 239 /* array of ClassRangeRecords */ | |
| 240 HB_UShort ClassRangeCount; | |
| 241 /* number of ClassRangeRecords */ | |
| 242 }; | |
| 243 | |
| 244 typedef struct HB_ClassDefFormat2_ HB_ClassDefFormat2; | |
| 245 | |
| 246 | |
| 247 struct HB_ClassDefinition_ | |
| 248 { | |
| 249 union | |
| 250 { | |
| 251 HB_ClassDefFormat1 cd1; | |
| 252 HB_ClassDefFormat2 cd2; | |
| 253 } cd; | |
| 254 | |
| 255 HB_Byte ClassFormat; /* 1 or 2 */ | |
| 256 HB_Bool loaded; | |
| 257 }; | |
| 258 | |
| 259 typedef struct HB_ClassDefinition_ HB_ClassDefinition; | |
| 260 | |
| 261 | |
| 262 struct HB_Device_ | |
| 263 { | |
| 264 HB_UShort* DeltaValue; /* array of compressed data */ | |
| 265 HB_UShort StartSize; /* smallest size to correct */ | |
| 266 HB_UShort EndSize; /* largest size to correct */ | |
| 267 HB_Byte DeltaFormat; /* DeltaValue array data format: | |
| 268 1, 2, or 3 */ | |
| 269 }; | |
| 270 | |
| 271 typedef struct HB_Device_ HB_Device; | |
| 272 | |
| 273 | |
| 274 enum HB_Type_ | |
| 275 { | |
| 276 HB_Type_GSUB, | |
| 277 HB_Type_GPOS | |
| 278 }; | |
| 279 | |
| 280 typedef enum HB_Type_ HB_Type; | |
| 281 | |
| 282 #ifdef HB_USE_PACKED_STRUCTS | |
| 283 #pragma pack(pop) | |
| 284 #endif | |
| 285 | |
| 286 HB_END_HEADER | |
| 287 | |
| 288 #endif /* HARFBUZZ_OPEN_H */ | |
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