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 18U_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 74typedef LEUnicode SplitMatra[3]; 75 76class MPreFixups; 77class LEGlyphStorage; 78 79// Dynamic Properties ( v2 fonts only ) 80typedef 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 88struct 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 144class IndicReordering /* not : public UObject because all methods are static */ { 145public: 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 169private: 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 177inline le_int32 IndicClassTable::getWorstCaseExpansion() const 178{ 179 return worstCaseExpansion; 180} 181 182inline le_bool IndicClassTable::getFilterZeroWidth() const 183{ 184 return (scriptFlags & SF_FILTER_ZERO_WIDTH) != 0; 185} 186 187inline 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 194inline le_bool IndicClassTable::isVowelModifier(CharClass charClass) 195{ 196 return (charClass & CF_CLASS_MASK) == CC_VOWEL_MODIFIER; 197} 198 199inline le_bool IndicClassTable::isStressMark(CharClass charClass) 200{ 201 return (charClass & CF_CLASS_MASK) == CC_STRESS_MARK; 202} 203 204inline le_bool IndicClassTable::isConsonant(CharClass charClass) 205{ 206 return (charClass & CF_CONSONANT) != 0; 207} 208 209inline le_bool IndicClassTable::isReph(CharClass charClass) 210{ 211 return (charClass & CF_REPH) != 0; 212} 213 214inline le_bool IndicClassTable::isNukta(CharClass charClass) 215{ 216 return (charClass & CF_CLASS_MASK) == CC_NUKTA; 217} 218 219inline le_bool IndicClassTable::isVirama(CharClass charClass) 220{ 221 return (charClass & CF_CLASS_MASK) == CC_VIRAMA; 222} 223 224inline le_bool IndicClassTable::isAlLakuna(CharClass charClass) 225{ 226 return (charClass & CF_CLASS_MASK) == CC_AL_LAKUNA; 227} 228 229inline le_bool IndicClassTable::isVattu(CharClass charClass) 230{ 231 return (charClass & CF_VATTU) != 0; 232} 233 234inline 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 241inline le_bool IndicClassTable::isSplitMatra(CharClass charClass) 242{ 243 return (charClass & CF_INDEX_MASK) != 0; 244} 245 246inline le_bool IndicClassTable::isLengthMark(CharClass charClass) 247{ 248 return (charClass & CF_LENGTH_MARK) != 0; 249} 250 251inline le_bool IndicClassTable::hasPostOrBelowBaseForm(CharClass charClass) 252{ 253 return (charClass & (CF_POST_BASE | CF_BELOW_BASE)) != 0; 254} 255 256inline le_bool IndicClassTable::hasPostBaseForm(CharClass charClass) 257{ 258 return (charClass & CF_POST_BASE) != 0; 259} 260 261inline le_bool IndicClassTable::hasPreBaseForm(CharClass charClass) 262{ 263 return (charClass & CF_PRE_BASE) != 0; 264} 265 266inline le_bool IndicClassTable::hasBelowBaseForm(CharClass charClass) 267{ 268 return (charClass & CF_BELOW_BASE) != 0; 269} 270 271inline le_bool IndicClassTable::hasAboveBaseForm(CharClass charClass) 272{ 273 return ((charClass & CF_POS_MASK) == CF_POS_ABOVE); 274} 275 276inline le_bool IndicClassTable::isVowelModifier(LEUnicode ch) const 277{ 278 return isVowelModifier(getCharClass(ch)); 279} 280 281inline le_bool IndicClassTable::isStressMark(LEUnicode ch) const 282{ 283 return isStressMark(getCharClass(ch)); 284} 285 286inline le_bool IndicClassTable::isConsonant(LEUnicode ch) const 287{ 288 return isConsonant(getCharClass(ch)); 289} 290 291inline le_bool IndicClassTable::isReph(LEUnicode ch) const 292{ 293 return isReph(getCharClass(ch)); 294} 295 296inline le_bool IndicClassTable::isVirama(LEUnicode ch) const 297{ 298 return isVirama(getCharClass(ch)); 299} 300 301inline le_bool IndicClassTable::isAlLakuna(LEUnicode ch) const 302{ 303 return isAlLakuna(getCharClass(ch)); 304} 305 306inline le_bool IndicClassTable::isNukta(LEUnicode ch) const 307{ 308 return isNukta(getCharClass(ch)); 309} 310 311inline le_bool IndicClassTable::isVattu(LEUnicode ch) const 312{ 313 return isVattu(getCharClass(ch)); 314} 315 316inline le_bool IndicClassTable::isMatra(LEUnicode ch) const 317{ 318 return isMatra(getCharClass(ch)); 319} 320 321inline le_bool IndicClassTable::isSplitMatra(LEUnicode ch) const 322{ 323 return isSplitMatra(getCharClass(ch)); 324} 325 326inline le_bool IndicClassTable::isLengthMark(LEUnicode ch) const 327{ 328 return isLengthMark(getCharClass(ch)); 329} 330 331inline le_bool IndicClassTable::hasPostOrBelowBaseForm(LEUnicode ch) const 332{ 333 return hasPostOrBelowBaseForm(getCharClass(ch)); 334} 335 336inline le_bool IndicClassTable::hasPostBaseForm(LEUnicode ch) const 337{ 338 return hasPostBaseForm(getCharClass(ch)); 339} 340 341inline le_bool IndicClassTable::hasBelowBaseForm(LEUnicode ch) const 342{ 343 return hasBelowBaseForm(getCharClass(ch)); 344} 345 346inline le_bool IndicClassTable::hasPreBaseForm(LEUnicode ch) const 347{ 348 return hasPreBaseForm(getCharClass(ch)); 349} 350 351inline le_bool IndicClassTable::hasAboveBaseForm(LEUnicode ch) const 352{ 353 return hasAboveBaseForm(getCharClass(ch)); 354} 355U_NAMESPACE_END 356#endif 357