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 "LEGlyphStorage.h"
sl@0: #include "LESwaps.h"
sl@0: 
sl@0: U_NAMESPACE_BEGIN
sl@0: 
sl@0: StateTableProcessor::StateTableProcessor()
sl@0: {
sl@0: }
sl@0: 
sl@0: StateTableProcessor::StateTableProcessor(const MorphSubtableHeader *morphSubtableHeader)
sl@0:   : SubtableProcessor(morphSubtableHeader)
sl@0: {
sl@0:     stateTableHeader = (const MorphStateTableHeader *) morphSubtableHeader;
sl@0: 
sl@0:     stateSize = SWAPW(stateTableHeader->stHeader.stateSize);
sl@0:     classTableOffset = SWAPW(stateTableHeader->stHeader.classTableOffset);
sl@0:     stateArrayOffset = SWAPW(stateTableHeader->stHeader.stateArrayOffset);
sl@0:     entryTableOffset = SWAPW(stateTableHeader->stHeader.entryTableOffset);
sl@0: 
sl@0:     classTable = (const ClassTable *) ((char *) &stateTableHeader->stHeader + classTableOffset);
sl@0:     firstGlyph = SWAPW(classTable->firstGlyph);
sl@0:     lastGlyph  = firstGlyph + SWAPW(classTable->nGlyphs);
sl@0: }
sl@0: 
sl@0: StateTableProcessor::~StateTableProcessor()
sl@0: {
sl@0: }
sl@0: 
sl@0: void StateTableProcessor::process(LEGlyphStorage &glyphStorage)
sl@0: {
sl@0:     // Start at state 0
sl@0:     // XXX: How do we know when to start at state 1?
sl@0:     ByteOffset currentState = stateArrayOffset;
sl@0: 
sl@0:     // XXX: reverse? 
sl@0:     le_int32 currGlyph = 0;
sl@0:     le_int32 glyphCount = glyphStorage.getGlyphCount();
sl@0: 
sl@0:     beginStateTable();
sl@0: 
sl@0:     while (currGlyph <= glyphCount) {
sl@0:         ClassCode classCode = classCodeOOB;
sl@0:         if (currGlyph == glyphCount) {
sl@0:             // XXX: How do we handle EOT vs. EOL?
sl@0:             classCode = classCodeEOT;
sl@0:         } else {
sl@0:             TTGlyphID glyphCode = (TTGlyphID) LE_GET_GLYPH(glyphStorage[currGlyph]);
sl@0: 
sl@0:             if (glyphCode == 0xFFFF) {
sl@0:                 classCode = classCodeDEL;
sl@0:             } else if ((glyphCode >= firstGlyph) && (glyphCode < lastGlyph)) {
sl@0:                 classCode = classTable->classArray[glyphCode - firstGlyph];
sl@0:             }
sl@0:         }
sl@0: 
sl@0:         const EntryTableIndex *stateArray = (const EntryTableIndex *) ((char *) &stateTableHeader->stHeader + currentState);
sl@0:         EntryTableIndex entryTableIndex = stateArray[(le_uint8)classCode];
sl@0: 
sl@0:         currentState = processStateEntry(glyphStorage, currGlyph, entryTableIndex);
sl@0:     }
sl@0: 
sl@0:     endStateTable();
sl@0: }
sl@0: 
sl@0: U_NAMESPACE_END