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