diff -r 000000000000 -r 1fb32624e06b fontservices/textshaperplugin/IcuSource/layout/IndicReordering.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/fontservices/textshaperplugin/IcuSource/layout/IndicReordering.h Tue Feb 02 02:02:46 2010 +0200 @@ -0,0 +1,376 @@ +/* + * + * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved + * + */ + +#ifndef __INDICREORDERING_H +#define __INDICREORDERING_H + +/** + * \file + * \internal + */ + +#include "LETypes.h" +#include "OpenTypeTables.h" + +U_NAMESPACE_BEGIN + +// Characters that get refered to by name... +#define C_SIGN_ZWNJ 0x200C +#define C_SIGN_ZWJ 0x200D + +// Character class values +#define CC_RESERVED 0U +#define CC_VOWEL_MODIFIER 1U +#define CC_STRESS_MARK 2U +#define CC_INDEPENDENT_VOWEL 3U +#define CC_INDEPENDENT_VOWEL_2 4U +#define CC_CONSONANT 5U +#define CC_CONSONANT_WITH_NUKTA 6U +#define CC_NUKTA 7U +#define CC_DEPENDENT_VOWEL 8U +#define CC_SPLIT_VOWEL_PIECE_1 9U +#define CC_SPLIT_VOWEL_PIECE_2 10U +#define CC_SPLIT_VOWEL_PIECE_3 11U +#define CC_VIRAMA 12U +#define CC_ZERO_WIDTH_MARK 13U +// Added by Nokia -- special case +#define CC_INDEPENDENT_VOWEL_A 14U +// Added by Nokia -- special case with independent vowel A +#define CC_DEPENDENT_VOWEL_CANDRA_E 15U +// Added by Nokia -- special case for Kannada Ra +#define CC_CONSONANT_KANNADA_BENGALI_RA 16U +// Added by Nokia -- special case for Tamil independent vowel O +#define CC_INDEPENDENT_VOWEL_TAMIL_O 17U + +// Added by Nokia -- special case for Gurmukhi Bearer ARA and independent A +#define CC_GUR_BEARER_A 18U +// Added by Nokia -- special case for Gurmukhi Bearer IRI +#define CC_GUR_BEARER_I 19U +// Added by Nokia -- special case for Gurmukhi Bearer URA +#define CC_GUR_BEARER_U 20U + +// Added by Nokia -- special case for Gurmukhi dependent Vowel which can combine with Bearer ARA +#define CC_GUR_DEPENDENT_VOWEL_A 21U +// Added by Nokia -- special case for Gurmukhi dependent Vowel which can combine with Bearer IRI +#define CC_GUR_DEPENDENT_VOWEL_I 22U +// Added by Nokia -- special case for Gurmukhi dependent Vowel which can combine with Bearer URA +#define CC_GUR_DEPENDENT_VOWEL_U 23U + +#define CC_COUNT 24U + +// Character class flags +#define CF_CLASS_MASK 0x0000FFFFU + +#define CF_CONSONANT 0x80000000U + +#define CF_REPH 0x40000000U +#define CF_VATTU 0x20000000U +#define CF_BELOW_BASE 0x10000000U +#define CF_POST_BASE 0x08000000U +#define CF_LENGTH_MARK 0x04000000U +// Added by Nokia -- special case for Bengali Ya +#define CF_CONSONANT_BENGALI_YA 0x00800000U + +// Added by Nokia -- 1922 Malayalam Chillu --> +#define CF_CONSONANT_MLYL_CHILLU 0x00400000U +#define CC_DEPENDENT_VOWEL_SIGN_MLYL_E 0xD46U +#define CC_CONSONANT_MLYL_YA 0xD2FU +#define CC_CONSONANT_MLYL_VA 0xD35U +#define CC_CONSONANT_MLYL_RA 0xD30U +#define CC_CONSONANT_MLYL_RRA 0xD31U +#define CC_CONSONANT_MLYL_LLA 0xD33U +#define CC_CONSONANT_MLYL_LLLA 0xD34U +// <-- 1922 mlyl + +#define CF_POS_BEFORE 0x00300000U +#define CF_POS_BELOW 0x00200000U +#define CF_POS_ABOVE 0x00100000U +#define CF_POS_AFTER 0x00000000U +#define CF_POS_MASK 0x00300000U + +#define CF_INDEX_MASK 0x000F0000U +#define CF_INDEX_SHIFT 16 + +// Script flag bits +#define SF_MATRAS_AFTER_BASE 0x80000000U +#define SF_REPH_AFTER_BELOW 0x40000000U +#define SF_EYELASH_RA 0x20000000U +#define SF_MPRE_FIXUP 0x10000000U +//Added by Nokia for matra combined with final form of YA in Gurmukhi +//Flags SF_MATRAS_AFTER_BASE and SF_MATRAS_AFTER_POSTBASE cannot coexist. +//with SF_MATRAS_AFTER_BASE setting: Mbelow, Mabove and Mpost are attached to base consonant. +//With SF_MATRAS_AFTER_AFTERBASE setting: Mbelow, Mabove and Mpost are attached to postbase consonant +//without SF_MATRAS_AFTER_BASE or SF_MATRAS_AFTER_AFTERBASE setting: Mbelow, Mabove are attached to +//base (or base+below-base consonant cluster), but Mpost attached to postbase +#define SF_MATRAS_AFTER_POSTBASE 0x08000000U + +#define SF_POST_BASE_LIMIT_MASK 0x0000FFFFU +#define SF_NO_POST_BASE_LIMIT 0x00007FFFU + +typedef LEUnicode SplitMatra[3]; + +class MPreFixups; +class LEGlyphStorage; + +struct IndicClassTable +{ + typedef le_uint32 CharClass; + typedef le_uint32 ScriptFlags; + + LEUnicode firstChar; + LEUnicode lastChar; + le_int32 worstCaseExpansion; + ScriptFlags scriptFlags; + const CharClass *classTable; + const SplitMatra *splitMatraTable; + + inline le_int32 getWorstCaseExpansion() const; + + CharClass getCharClass(LEUnicode ch) const; + + inline const SplitMatra *getSplitMatra(CharClass charClass) const; + + inline le_bool isVowelModifier(LEUnicode ch) const; + inline le_bool isStressMark(LEUnicode ch) const; + inline le_bool isConsonant(LEUnicode ch) const; + inline le_bool isReph(LEUnicode ch) const; + inline le_bool isVirama(LEUnicode ch) const; + inline le_bool isNukta(LEUnicode ch) const; + inline le_bool isVattu(LEUnicode ch) const; + inline le_bool isMatra(LEUnicode ch) const; + inline le_bool isSplitMatra(LEUnicode ch) const; + inline le_bool isLengthMark(LEUnicode ch) const; + inline le_bool hasPostOrBelowBaseForm(LEUnicode ch) const; + inline le_bool hasPostBaseForm(LEUnicode ch) const; + inline le_bool hasBelowBaseForm(LEUnicode ch) const; + // Added by Nokia: For special case Bengali Ya + inline le_bool isBengaliYa(LEUnicode ch) const; + // Added by Nokia -- 1922 mlyl --> + inline le_bool isMlylChillu(LEUnicode ch) const; + // <-- 1922 mlyl + + inline static le_bool isVowelModifier(CharClass charClass); + inline static le_bool isStressMark(CharClass charClass); + inline static le_bool isConsonant(CharClass charClass); + inline static le_bool isReph(CharClass charClass); + inline static le_bool isVirama(CharClass charClass); + inline static le_bool isNukta(CharClass charClass); + inline static le_bool isVattu(CharClass charClass); + inline static le_bool isMatra(CharClass charClass); + inline static le_bool isSplitMatra(CharClass charClass); + inline static le_bool isLengthMark(CharClass charClass); + inline static le_bool hasPostOrBelowBaseForm(CharClass charClass); + inline static le_bool hasPostBaseForm(CharClass charClass); + inline static le_bool hasBelowBaseForm(CharClass charClass); + // Added by Nokia: For special case Bengali Ya + inline static le_bool isBengaliYa(CharClass charClass); + // Added by Nokia -- 1922 mlyl --> + inline static le_bool isMlylChillu(CharClass charClass); + // <-- 1922 mlyl + + static const IndicClassTable *getScriptClassTable(le_int32 scriptCode); +}; + +class IndicReordering /* not : public UObject because all methods are static */ { +public: + static le_int32 getWorstCaseExpansion(le_int32 scriptCode); + + static le_int32 reorder(const LEUnicode *theChars, le_int32 charCount, le_int32 scriptCode, + LEUnicode *outChars, LEGlyphStorage &glyphStorage, + MPreFixups **outMPreFixups, LEErrorCode& success); + + static void adjustMPres(MPreFixups *mpreFixups, LEGlyphStorage &glyphStorage, + LEErrorCode& success); + + static const LETag *getFeatureOrder(); + +private: + // do not instantiate + IndicReordering(); + + static le_int32 findSyllable(const IndicClassTable *classTable, const LEUnicode *chars, le_int32 prev, le_int32 charCount); + +}; + +inline le_int32 IndicClassTable::getWorstCaseExpansion() const +{ + return worstCaseExpansion; +} + +inline const SplitMatra *IndicClassTable::getSplitMatra(CharClass charClass) const +{ + le_int32 index = (charClass & CF_INDEX_MASK) >> CF_INDEX_SHIFT; + + return &splitMatraTable[index - 1]; +} + +inline le_bool IndicClassTable::isVowelModifier(CharClass charClass) +{ + return (charClass & CF_CLASS_MASK) == CC_VOWEL_MODIFIER; +} + +inline le_bool IndicClassTable::isStressMark(CharClass charClass) +{ + return (charClass & CF_CLASS_MASK) == CC_STRESS_MARK; +} + +inline le_bool IndicClassTable::isConsonant(CharClass charClass) +{ + return (charClass & CF_CONSONANT) != 0; +} + +inline le_bool IndicClassTable::isReph(CharClass charClass) +{ + return (charClass & CF_REPH) != 0; +} + +inline le_bool IndicClassTable::isNukta(CharClass charClass) +{ + return (charClass & CF_CLASS_MASK) == CC_NUKTA; +} + +inline le_bool IndicClassTable::isVirama(CharClass charClass) +{ + return (charClass & CF_CLASS_MASK) == CC_VIRAMA; +} + +inline le_bool IndicClassTable::isVattu(CharClass charClass) +{ + return (charClass & CF_VATTU) != 0; +} + +inline le_bool IndicClassTable::isMatra(CharClass charClass) +{ + charClass &= CF_CLASS_MASK; + + // Added special CANDRA E char class check to enable formation of Devanagari CANDRA A + // Added speical CC_GUR_DEPENDENT_VOWEL_* to support decompositions of the independent + // vowels into a sequence of a vowel bearer and a depending vowel sign + return charClass >= CC_DEPENDENT_VOWEL && charClass <= CC_SPLIT_VOWEL_PIECE_3 + || charClass == CC_DEPENDENT_VOWEL_CANDRA_E + || charClass == CC_GUR_DEPENDENT_VOWEL_A + || charClass == CC_GUR_DEPENDENT_VOWEL_I + || charClass == CC_GUR_DEPENDENT_VOWEL_U; +} + +inline le_bool IndicClassTable::isSplitMatra(CharClass charClass) +{ + return (charClass & CF_INDEX_MASK) != 0; +} + +inline le_bool IndicClassTable::isLengthMark(CharClass charClass) +{ + return (charClass & CF_LENGTH_MARK) != 0; +} + +inline le_bool IndicClassTable::hasPostOrBelowBaseForm(CharClass charClass) +{ + return (charClass & (CF_POST_BASE | CF_BELOW_BASE)) != 0; +} + +inline le_bool IndicClassTable::hasPostBaseForm(CharClass charClass) +{ + return (charClass & CF_POST_BASE) != 0; +} + +inline le_bool IndicClassTable::hasBelowBaseForm(CharClass charClass) +{ + return (charClass & CF_BELOW_BASE) != 0; +} + +// Added by Nokia -- For determining whether a character is a Bengali Ya +inline le_bool IndicClassTable::isBengaliYa(CharClass charClass) + { + return (charClass & CF_CONSONANT_BENGALI_YA) != 0; + } + +// Added by Nokia -- 1922 mlyl --> +inline le_bool IndicClassTable::isMlylChillu(CharClass charClass) +{ + return (charClass & CF_CONSONANT_MLYL_CHILLU) != 0; +} +// <-- 1922 mlyl + +inline le_bool IndicClassTable::isVowelModifier(LEUnicode ch) const +{ + return isVowelModifier(getCharClass(ch)); +} + +inline le_bool IndicClassTable::isStressMark(LEUnicode ch) const +{ + return isStressMark(getCharClass(ch)); +} + +inline le_bool IndicClassTable::isConsonant(LEUnicode ch) const +{ + return isConsonant(getCharClass(ch)); +} + +inline le_bool IndicClassTable::isReph(LEUnicode ch) const +{ + return isReph(getCharClass(ch)); +} + +inline le_bool IndicClassTable::isVirama(LEUnicode ch) const +{ + return isVirama(getCharClass(ch)); +} + +inline le_bool IndicClassTable::isNukta(LEUnicode ch) const +{ + return isNukta(getCharClass(ch)); +} + +inline le_bool IndicClassTable::isVattu(LEUnicode ch) const +{ + return isVattu(getCharClass(ch)); +} + +inline le_bool IndicClassTable::isMatra(LEUnicode ch) const +{ + return isMatra(getCharClass(ch)); +} + +inline le_bool IndicClassTable::isSplitMatra(LEUnicode ch) const +{ + return isSplitMatra(getCharClass(ch)); +} + +inline le_bool IndicClassTable::isLengthMark(LEUnicode ch) const +{ + return isLengthMark(getCharClass(ch)); +} + +inline le_bool IndicClassTable::hasPostOrBelowBaseForm(LEUnicode ch) const +{ + return hasPostOrBelowBaseForm(getCharClass(ch)); +} + +inline le_bool IndicClassTable::hasPostBaseForm(LEUnicode ch) const +{ + return hasPostBaseForm(getCharClass(ch)); +} + +inline le_bool IndicClassTable::hasBelowBaseForm(LEUnicode ch) const +{ + return hasBelowBaseForm(getCharClass(ch)); +} + +// Added by Nokia -- For determining whether a character is a Bengali Ya +inline le_bool IndicClassTable::isBengaliYa(LEUnicode ch) const +{ + return isBengaliYa(getCharClass(ch)); +} + +// Added by Nokia -- 1922 mlyl --> +inline le_bool IndicClassTable::isMlylChillu(LEUnicode ch) const +{ + return isMlylChillu(getCharClass(ch)); +} +// <-- 1922 mlyl + +U_NAMESPACE_END +#endif