1 /* 2 * 3 * (C) Copyright IBM Corp. 1998-2009 - All Rights Reserved 4 * 5 */ 6 7 #ifndef __INDICREORDERING_H 8 #define __INDICREORDERING_H 9 10 /** 11 * \file 12 * \internal 13 */ 14 15 #include "LETypes.h" 16 #include "OpenTypeTables.h" 17 18 U_NAMESPACE_BEGIN 19 20 // Characters that get refered to by name... 21 #define C_SIGN_ZWNJ 0x200C 22 #define C_SIGN_ZWJ 0x200D 23 24 // Character class values 25 #define CC_RESERVED 0U 26 #define CC_VOWEL_MODIFIER 1U 27 #define CC_STRESS_MARK 2U 28 #define CC_INDEPENDENT_VOWEL 3U 29 #define CC_INDEPENDENT_VOWEL_2 4U 30 #define CC_INDEPENDENT_VOWEL_3 5U 31 #define CC_CONSONANT 6U 32 #define CC_CONSONANT_WITH_NUKTA 7U 33 #define CC_NUKTA 8U 34 #define CC_DEPENDENT_VOWEL 9U 35 #define CC_SPLIT_VOWEL_PIECE_1 10U 36 #define CC_SPLIT_VOWEL_PIECE_2 11U 37 #define CC_SPLIT_VOWEL_PIECE_3 12U 38 #define CC_VIRAMA 13U 39 #define CC_ZERO_WIDTH_MARK 14U 40 #define CC_AL_LAKUNA 15U 41 #define CC_COUNT 16U 42 43 // Character class flags 44 #define CF_CLASS_MASK 0x0000FFFFU 45 46 #define CF_CONSONANT 0x80000000U 47 48 #define CF_REPH 0x40000000U 49 #define CF_VATTU 0x20000000U 50 #define CF_BELOW_BASE 0x10000000U 51 #define CF_POST_BASE 0x08000000U 52 #define CF_LENGTH_MARK 0x04000000U 53 #define CF_PRE_BASE 0x02000000U 54 55 #define CF_POS_BEFORE 0x00300000U 56 #define CF_POS_BELOW 0x00200000U 57 #define CF_POS_ABOVE 0x00100000U 58 #define CF_POS_AFTER 0x00000000U 59 #define CF_POS_MASK 0x00300000U 60 61 #define CF_INDEX_MASK 0x000F0000U 62 #define CF_INDEX_SHIFT 16 63 64 // Script flag bits 65 #define SF_MATRAS_AFTER_BASE 0x80000000U 66 #define SF_REPH_AFTER_BELOW 0x40000000U 67 #define SF_EYELASH_RA 0x20000000U 68 #define SF_MPRE_FIXUP 0x10000000U 69 #define SF_FILTER_ZERO_WIDTH 0x08000000U 70 71 #define SF_POST_BASE_LIMIT_MASK 0x0000FFFFU 72 #define SF_NO_POST_BASE_LIMIT 0x00007FFFU 73 74 typedef LEUnicode SplitMatra[3]; 75 76 class MPreFixups; 77 class LEGlyphStorage; 78 79 // Dynamic Properties ( v2 fonts only ) 80 typedef le_uint32 DynamicProperties; 81 82 #define DP_REPH 0x80000000U 83 #define DP_HALF 0x40000000U 84 #define DP_PREF 0x20000000U 85 #define DP_BLWF 0x10000000U 86 #define DP_PSTF 0x08000000U 87 88 struct IndicClassTable 89 { 90 typedef le_uint32 CharClass; 91 typedef le_uint32 ScriptFlags; 92 93 LEUnicode firstChar; 94 LEUnicode lastChar; 95 le_int32 worstCaseExpansion; 96 ScriptFlags scriptFlags; 97 const CharClass *classTable; 98 const SplitMatra *splitMatraTable; 99 100 inline le_int32 getWorstCaseExpansion() const; 101 inline le_bool getFilterZeroWidth() const; 102 103 CharClass getCharClass(LEUnicode ch) const; 104 105 inline const SplitMatra *getSplitMatra(CharClass charClass) const; 106 107 inline le_bool isVowelModifier(LEUnicode ch) const; 108 inline le_bool isStressMark(LEUnicode ch) const; 109 inline le_bool isConsonant(LEUnicode ch) const; 110 inline le_bool isReph(LEUnicode ch) const; 111 inline le_bool isVirama(LEUnicode ch) const; 112 inline le_bool isAlLakuna(LEUnicode ch) const; 113 inline le_bool isNukta(LEUnicode ch) const; 114 inline le_bool isVattu(LEUnicode ch) const; 115 inline le_bool isMatra(LEUnicode ch) const; 116 inline le_bool isSplitMatra(LEUnicode ch) const; 117 inline le_bool isLengthMark(LEUnicode ch) const; 118 inline le_bool hasPostOrBelowBaseForm(LEUnicode ch) const; 119 inline le_bool hasPostBaseForm(LEUnicode ch) const; 120 inline le_bool hasBelowBaseForm(LEUnicode ch) const; 121 inline le_bool hasAboveBaseForm(LEUnicode ch) const; 122 inline le_bool hasPreBaseForm(LEUnicode ch) const; 123 124 inline static le_bool isVowelModifier(CharClass charClass); 125 inline static le_bool isStressMark(CharClass charClass); 126 inline static le_bool isConsonant(CharClass charClass); 127 inline static le_bool isReph(CharClass charClass); 128 inline static le_bool isVirama(CharClass charClass); 129 inline static le_bool isAlLakuna(CharClass charClass); 130 inline static le_bool isNukta(CharClass charClass); 131 inline static le_bool isVattu(CharClass charClass); 132 inline static le_bool isMatra(CharClass charClass); 133 inline static le_bool isSplitMatra(CharClass charClass); 134 inline static le_bool isLengthMark(CharClass charClass); 135 inline static le_bool hasPostOrBelowBaseForm(CharClass charClass); 136 inline static le_bool hasPostBaseForm(CharClass charClass); 137 inline static le_bool hasBelowBaseForm(CharClass charClass); 138 inline static le_bool hasAboveBaseForm(CharClass charClass); 139 inline static le_bool hasPreBaseForm(CharClass charClass); 140 141 static const IndicClassTable *getScriptClassTable(le_int32 scriptCode); 142 }; 143 144 class IndicReordering /* not : public UObject because all methods are static */ { 145 public: 146 static le_int32 getWorstCaseExpansion(le_int32 scriptCode); 147 148 static le_bool getFilterZeroWidth(le_int32 scriptCode); 149 150 static le_int32 reorder(const LEUnicode *theChars, le_int32 charCount, le_int32 scriptCode, 151 LEUnicode *outChars, LEGlyphStorage &glyphStorage, 152 MPreFixups **outMPreFixups, LEErrorCode& success); 153 154 static void adjustMPres(MPreFixups *mpreFixups, LEGlyphStorage &glyphStorage, LEErrorCode& success); 155 156 static le_int32 v2process(const LEUnicode *theChars, le_int32 charCount, le_int32 scriptCode, 157 LEUnicode *outChars, LEGlyphStorage &glyphStorage); 158 159 static const FeatureMap *getFeatureMap(le_int32 &count); 160 161 static const FeatureMap *getv2FeatureMap(le_int32 &count); 162 163 static void applyPresentationForms(LEGlyphStorage &glyphStorage, le_int32 count); 164 165 static void finalReordering(LEGlyphStorage &glyphStorage, le_int32 count); 166 167 static void getDynamicProperties(DynamicProperties *dProps, const IndicClassTable *classTable); 168 169 private: 170 // do not instantiate 171 IndicReordering(); 172 173 static le_int32 findSyllable(const IndicClassTable *classTable, const LEUnicode *chars, le_int32 prev, le_int32 charCount); 174 175 }; 176 177 inline le_int32 IndicClassTable::getWorstCaseExpansion() const 178 { 179 return worstCaseExpansion; 180 } 181 182 inline le_bool IndicClassTable::getFilterZeroWidth() const 183 { 184 return (scriptFlags & SF_FILTER_ZERO_WIDTH) != 0; 185 } 186 187 inline const SplitMatra *IndicClassTable::getSplitMatra(CharClass charClass) const 188 { 189 le_int32 index = (charClass & CF_INDEX_MASK) >> CF_INDEX_SHIFT; 190 191 return &splitMatraTable[index - 1]; 192 } 193 194 inline le_bool IndicClassTable::isVowelModifier(CharClass charClass) 195 { 196 return (charClass & CF_CLASS_MASK) == CC_VOWEL_MODIFIER; 197 } 198 199 inline le_bool IndicClassTable::isStressMark(CharClass charClass) 200 { 201 return (charClass & CF_CLASS_MASK) == CC_STRESS_MARK; 202 } 203 204 inline le_bool IndicClassTable::isConsonant(CharClass charClass) 205 { 206 return (charClass & CF_CONSONANT) != 0; 207 } 208 209 inline le_bool IndicClassTable::isReph(CharClass charClass) 210 { 211 return (charClass & CF_REPH) != 0; 212 } 213 214 inline le_bool IndicClassTable::isNukta(CharClass charClass) 215 { 216 return (charClass & CF_CLASS_MASK) == CC_NUKTA; 217 } 218 219 inline le_bool IndicClassTable::isVirama(CharClass charClass) 220 { 221 return (charClass & CF_CLASS_MASK) == CC_VIRAMA; 222 } 223 224 inline le_bool IndicClassTable::isAlLakuna(CharClass charClass) 225 { 226 return (charClass & CF_CLASS_MASK) == CC_AL_LAKUNA; 227 } 228 229 inline le_bool IndicClassTable::isVattu(CharClass charClass) 230 { 231 return (charClass & CF_VATTU) != 0; 232 } 233 234 inline le_bool IndicClassTable::isMatra(CharClass charClass) 235 { 236 charClass &= CF_CLASS_MASK; 237 238 return charClass >= CC_DEPENDENT_VOWEL && charClass <= CC_SPLIT_VOWEL_PIECE_3; 239 } 240 241 inline le_bool IndicClassTable::isSplitMatra(CharClass charClass) 242 { 243 return (charClass & CF_INDEX_MASK) != 0; 244 } 245 246 inline le_bool IndicClassTable::isLengthMark(CharClass charClass) 247 { 248 return (charClass & CF_LENGTH_MARK) != 0; 249 } 250 251 inline le_bool IndicClassTable::hasPostOrBelowBaseForm(CharClass charClass) 252 { 253 return (charClass & (CF_POST_BASE | CF_BELOW_BASE)) != 0; 254 } 255 256 inline le_bool IndicClassTable::hasPostBaseForm(CharClass charClass) 257 { 258 return (charClass & CF_POST_BASE) != 0; 259 } 260 261 inline le_bool IndicClassTable::hasPreBaseForm(CharClass charClass) 262 { 263 return (charClass & CF_PRE_BASE) != 0; 264 } 265 266 inline le_bool IndicClassTable::hasBelowBaseForm(CharClass charClass) 267 { 268 return (charClass & CF_BELOW_BASE) != 0; 269 } 270 271 inline le_bool IndicClassTable::hasAboveBaseForm(CharClass charClass) 272 { 273 return ((charClass & CF_POS_MASK) == CF_POS_ABOVE); 274 } 275 276 inline le_bool IndicClassTable::isVowelModifier(LEUnicode ch) const 277 { 278 return isVowelModifier(getCharClass(ch)); 279 } 280 281 inline le_bool IndicClassTable::isStressMark(LEUnicode ch) const 282 { 283 return isStressMark(getCharClass(ch)); 284 } 285 286 inline le_bool IndicClassTable::isConsonant(LEUnicode ch) const 287 { 288 return isConsonant(getCharClass(ch)); 289 } 290 291 inline le_bool IndicClassTable::isReph(LEUnicode ch) const 292 { 293 return isReph(getCharClass(ch)); 294 } 295 296 inline le_bool IndicClassTable::isVirama(LEUnicode ch) const 297 { 298 return isVirama(getCharClass(ch)); 299 } 300 301 inline le_bool IndicClassTable::isAlLakuna(LEUnicode ch) const 302 { 303 return isAlLakuna(getCharClass(ch)); 304 } 305 306 inline le_bool IndicClassTable::isNukta(LEUnicode ch) const 307 { 308 return isNukta(getCharClass(ch)); 309 } 310 311 inline le_bool IndicClassTable::isVattu(LEUnicode ch) const 312 { 313 return isVattu(getCharClass(ch)); 314 } 315 316 inline le_bool IndicClassTable::isMatra(LEUnicode ch) const 317 { 318 return isMatra(getCharClass(ch)); 319 } 320 321 inline le_bool IndicClassTable::isSplitMatra(LEUnicode ch) const 322 { 323 return isSplitMatra(getCharClass(ch)); 324 } 325 326 inline le_bool IndicClassTable::isLengthMark(LEUnicode ch) const 327 { 328 return isLengthMark(getCharClass(ch)); 329 } 330 331 inline le_bool IndicClassTable::hasPostOrBelowBaseForm(LEUnicode ch) const 332 { 333 return hasPostOrBelowBaseForm(getCharClass(ch)); 334 } 335 336 inline le_bool IndicClassTable::hasPostBaseForm(LEUnicode ch) const 337 { 338 return hasPostBaseForm(getCharClass(ch)); 339 } 340 341 inline le_bool IndicClassTable::hasBelowBaseForm(LEUnicode ch) const 342 { 343 return hasBelowBaseForm(getCharClass(ch)); 344 } 345 346 inline le_bool IndicClassTable::hasPreBaseForm(LEUnicode ch) const 347 { 348 return hasPreBaseForm(getCharClass(ch)); 349 } 350 351 inline le_bool IndicClassTable::hasAboveBaseForm(LEUnicode ch) const 352 { 353 return hasAboveBaseForm(getCharClass(ch)); 354 } 355 U_NAMESPACE_END 356 #endif 357
