1/* 2 * 3 * (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved 4 * 5 */ 6 7#include "LETypes.h" 8#include "MorphTables.h" 9#include "StateTables.h" 10#include "MorphStateTables.h" 11#include "SubtableProcessor.h" 12#include "StateTableProcessor.h" 13#include "ContextualGlyphSubstProc.h" 14#include "LEGlyphStorage.h" 15#include "LESwaps.h" 16 17U_NAMESPACE_BEGIN 18 19UOBJECT_DEFINE_RTTI_IMPLEMENTATION(ContextualGlyphSubstitutionProcessor) 20 21ContextualGlyphSubstitutionProcessor::ContextualGlyphSubstitutionProcessor(const MorphSubtableHeader *morphSubtableHeader) 22 : StateTableProcessor(morphSubtableHeader) 23{ 24 contextualGlyphSubstitutionHeader = (const ContextualGlyphSubstitutionHeader *) morphSubtableHeader; 25 substitutionTableOffset = SWAPW(contextualGlyphSubstitutionHeader->substitutionTableOffset); 26 27 entryTable = (const ContextualGlyphSubstitutionStateEntry *) ((char *) &stateTableHeader->stHeader + entryTableOffset); 28} 29 30ContextualGlyphSubstitutionProcessor::~ContextualGlyphSubstitutionProcessor() 31{ 32} 33 34void ContextualGlyphSubstitutionProcessor::beginStateTable() 35{ 36 markGlyph = 0; 37} 38 39ByteOffset ContextualGlyphSubstitutionProcessor::processStateEntry(LEGlyphStorage &glyphStorage, le_int32 &currGlyph, EntryTableIndex index) 40{ 41 const ContextualGlyphSubstitutionStateEntry *entry = &entryTable[index]; 42 ByteOffset newState = SWAPW(entry->newStateOffset); 43 le_int16 flags = SWAPW(entry->flags); 44 WordOffset markOffset = SWAPW(entry->markOffset); 45 WordOffset currOffset = SWAPW(entry->currOffset); 46 47 if (markOffset != 0) { 48 const le_int16 *table = (const le_int16 *) ((char *) &stateTableHeader->stHeader + markOffset * 2); 49 LEGlyphID mGlyph = glyphStorage[markGlyph]; 50 TTGlyphID newGlyph = SWAPW(table[LE_GET_GLYPH(mGlyph)]); 51 52 glyphStorage[markGlyph] = LE_SET_GLYPH(mGlyph, newGlyph); 53 } 54 55 if (currOffset != 0) { 56 const le_int16 *table = (const le_int16 *) ((char *) &stateTableHeader->stHeader + currOffset * 2); 57 LEGlyphID thisGlyph = glyphStorage[currGlyph]; 58 TTGlyphID newGlyph = SWAPW(table[LE_GET_GLYPH(thisGlyph)]); 59 60 glyphStorage[currGlyph] = LE_SET_GLYPH(thisGlyph, newGlyph); 61 } 62 63 if (flags & cgsSetMark) { 64 markGlyph = currGlyph; 65 } 66 67 if (!(flags & cgsDontAdvance)) { 68 // should handle reverse too! 69 currGlyph += 1; 70 } 71 72 return newState; 73} 74 75void ContextualGlyphSubstitutionProcessor::endStateTable() 76{ 77} 78 79U_NAMESPACE_END 80