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