sl@0: /*
sl@0:  *
sl@0:  * (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved
sl@0:  *
sl@0:  */
sl@0: 
sl@0: #include "LETypes.h"
sl@0: #include "MorphTables.h"
sl@0: #include "StateTables.h"
sl@0: #include "MorphStateTables.h"
sl@0: #include "SubtableProcessor.h"
sl@0: #include "StateTableProcessor.h"
sl@0: #include "ContextualGlyphSubstProc.h"
sl@0: #include "LEGlyphStorage.h"
sl@0: #include "LESwaps.h"
sl@0: 
sl@0: U_NAMESPACE_BEGIN
sl@0: 
sl@0: UOBJECT_DEFINE_RTTI_IMPLEMENTATION(ContextualGlyphSubstitutionProcessor)
sl@0: 
sl@0: ContextualGlyphSubstitutionProcessor::ContextualGlyphSubstitutionProcessor(const MorphSubtableHeader *morphSubtableHeader)
sl@0:   : StateTableProcessor(morphSubtableHeader)
sl@0: {
sl@0:     contextualGlyphSubstitutionHeader = (const ContextualGlyphSubstitutionHeader *) morphSubtableHeader;
sl@0:     substitutionTableOffset = SWAPW(contextualGlyphSubstitutionHeader->substitutionTableOffset);
sl@0: 
sl@0:     entryTable = (const ContextualGlyphSubstitutionStateEntry *) ((char *) &stateTableHeader->stHeader + entryTableOffset);
sl@0: }
sl@0: 
sl@0: ContextualGlyphSubstitutionProcessor::~ContextualGlyphSubstitutionProcessor()
sl@0: {
sl@0: }
sl@0: 
sl@0: void ContextualGlyphSubstitutionProcessor::beginStateTable()
sl@0: {
sl@0:     markGlyph = 0;
sl@0: }
sl@0: 
sl@0: ByteOffset ContextualGlyphSubstitutionProcessor::processStateEntry(LEGlyphStorage &glyphStorage, le_int32 &currGlyph, EntryTableIndex index)
sl@0: {
sl@0:     const ContextualGlyphSubstitutionStateEntry *entry = &entryTable[index];
sl@0:     ByteOffset newState = SWAPW(entry->newStateOffset);
sl@0:     le_int16 flags = SWAPW(entry->flags);
sl@0:     WordOffset markOffset = SWAPW(entry->markOffset);
sl@0:     WordOffset currOffset = SWAPW(entry->currOffset);
sl@0: 
sl@0:     if (markOffset != 0) {
sl@0:         const le_int16 *table = (const le_int16 *) ((char *) &stateTableHeader->stHeader + markOffset * 2);
sl@0:         LEGlyphID mGlyph = glyphStorage[markGlyph];
sl@0:         TTGlyphID newGlyph = SWAPW(table[LE_GET_GLYPH(mGlyph)]);
sl@0: 
sl@0:          glyphStorage[markGlyph] = LE_SET_GLYPH(mGlyph, newGlyph);
sl@0:     }
sl@0: 
sl@0:     if (currOffset != 0) {
sl@0:         const le_int16 *table = (const le_int16 *) ((char *) &stateTableHeader->stHeader + currOffset * 2);
sl@0:         LEGlyphID thisGlyph = glyphStorage[currGlyph];
sl@0:         TTGlyphID newGlyph = SWAPW(table[LE_GET_GLYPH(thisGlyph)]);
sl@0: 
sl@0:         glyphStorage[currGlyph] = LE_SET_GLYPH(thisGlyph, newGlyph);
sl@0:     }
sl@0: 
sl@0:     if (flags & cgsSetMark) {
sl@0:         markGlyph = currGlyph;
sl@0:     }
sl@0: 
sl@0:     if (!(flags & cgsDontAdvance)) {
sl@0:         // should handle reverse too!
sl@0:         currGlyph += 1;
sl@0:     }
sl@0: 
sl@0:     return newState;
sl@0: }
sl@0: 
sl@0: void ContextualGlyphSubstitutionProcessor::endStateTable()
sl@0: {
sl@0: }
sl@0: 
sl@0: U_NAMESPACE_END