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/*
*
* (C) Copyright IBM Corp. and others 1998-2013 - All Rights Reserved
*
*/
#include "LETypes.h"
#include "MorphTables.h"
#include "StateTables.h"
#include "MorphStateTables.h"
#include "SubtableProcessor2.h"
#include "StateTableProcessor2.h"
#include "ContextualGlyphSubstProc2.h"
#include "LEGlyphStorage.h"
#include "LESwaps.h"
U_NAMESPACE_BEGIN
UOBJECT_DEFINE_RTTI_IMPLEMENTATION(ContextualGlyphSubstitutionProcessor2)
ContextualGlyphSubstitutionProcessor2::ContextualGlyphSubstitutionProcessor2(
const LEReferenceTo<MorphSubtableHeader2> &morphSubtableHeader, LEErrorCode &success)
: StateTableProcessor2(morphSubtableHeader, success), contextualGlyphHeader(morphSubtableHeader, success)
{
if(LE_FAILURE(success)) return;
le_uint32 perGlyphTableOffset = SWAPL(contextualGlyphHeader->perGlyphTableOffset);
perGlyphTable = LEReferenceToArrayOf<le_uint32> (stHeader, success, perGlyphTableOffset, LE_UNBOUNDED_ARRAY);
entryTable = LEReferenceToArrayOf<ContextualGlyphStateEntry2>(stHeader, success, entryTableOffset, LE_UNBOUNDED_ARRAY);
}
ContextualGlyphSubstitutionProcessor2::~ContextualGlyphSubstitutionProcessor2()
{
}
void ContextualGlyphSubstitutionProcessor2::beginStateTable()
{
markGlyph = 0;
}
le_uint16 ContextualGlyphSubstitutionProcessor2::processStateEntry(LEGlyphStorage &glyphStorage, le_int32 &currGlyph,
EntryTableIndex2 index, LEErrorCode &success)
{
if(LE_FAILURE(success)) return 0;
const ContextualGlyphStateEntry2 *entry = entryTable.getAlias(index, success);
if(LE_FAILURE(success)) return 0;
le_uint16 newState = SWAPW(entry->newStateIndex);
le_uint16 flags = SWAPW(entry->flags);
le_uint16 markIndex = SWAPW(entry->markIndex);
le_uint16 currIndex = SWAPW(entry->currIndex);
if (markIndex != 0x0FFFF) {
if (markGlyph < 0 || markGlyph >= glyphStorage.getGlyphCount()) {
success = LE_INDEX_OUT_OF_BOUNDS_ERROR;
return 0;
}
le_uint32 offset = SWAPL(perGlyphTable(markIndex, success));
LEGlyphID mGlyph = glyphStorage[markGlyph];
TTGlyphID newGlyph = lookup(offset, mGlyph, success);
glyphStorage[markGlyph] = LE_SET_GLYPH(mGlyph, newGlyph);
}
if (currIndex != 0x0FFFF) {
if (currGlyph < 0 || currGlyph >= glyphStorage.getGlyphCount()) {
success = LE_INDEX_OUT_OF_BOUNDS_ERROR;
return 0;
}
le_uint32 offset = SWAPL(perGlyphTable(currIndex, success));
LEGlyphID thisGlyph = glyphStorage[currGlyph];
TTGlyphID newGlyph = lookup(offset, thisGlyph, success);
glyphStorage[currGlyph] = LE_SET_GLYPH(thisGlyph, newGlyph);
}
if (flags & cgsSetMark) {
markGlyph = currGlyph;
}
if (!(flags & cgsDontAdvance)) {
currGlyph += dir;
}
return newState;
}
TTGlyphID ContextualGlyphSubstitutionProcessor2::lookup(le_uint32 offset, LEGlyphID gid, LEErrorCode &success)
{
TTGlyphID newGlyph = 0xFFFF;
if(LE_FAILURE(success)) return newGlyph;
LEReferenceTo<LookupTable> lookupTable(perGlyphTable, success, offset);
if(LE_FAILURE(success)) return newGlyph;
le_int16 format = SWAPW(lookupTable->format);
switch (format) {
case ltfSimpleArray: {
#ifdef TEST_FORMAT
// Disabled pending for design review
LEReferenceTo<SimpleArrayLookupTable> lookupTable0(lookupTable, success);
LEReferenceToArrayOf<LookupValue> valueArray(lookupTable0, success, &lookupTable0->valueArray[0], LE_UNBOUNDED_ARRAY);
if(LE_FAILURE(success)) return newGlyph;
TTGlyphID glyphCode = (TTGlyphID) LE_GET_GLYPH(gid);
newGlyph = SWAPW(lookupTable0->valueArray(glyphCode, success));
#endif
break;
}
case ltfSegmentSingle: {
#ifdef TEST_FORMAT
// Disabled pending for design review
LEReferenceTo<SegmentSingleLookupTable> lookupTable2 = (SegmentSingleLookupTable *) lookupTable;
const LookupSegment *segment = lookupTable2->lookupSegment(lookupTable2->segments, gid);
if (segment != NULL) {
newGlyph = SWAPW(segment->value);
}
#endif
break;
}
case ltfSegmentArray: {
//printf("Context Lookup Table Format4: specific interpretation needed!\n");
break;
}
case ltfSingleTable:
{
#ifdef TEST_FORMAT
// Disabled pending for design review
LEReferenceTo<SingleTableLookupTable> lookupTable6 = (SingleTableLookupTable *) lookupTable;
const LEReferenceTo<LookupSingle> segment = lookupTable6->lookupSingle(lookupTable6->entries, gid);
if (segment != NULL) {
newGlyph = SWAPW(segment->value);
}
#endif
break;
}
case ltfTrimmedArray: {
LEReferenceTo<TrimmedArrayLookupTable> lookupTable8(lookupTable, success);
if (LE_FAILURE(success)) return newGlyph;
TTGlyphID firstGlyph = SWAPW(lookupTable8->firstGlyph);
TTGlyphID glyphCount = SWAPW(lookupTable8->glyphCount);
TTGlyphID lastGlyph = firstGlyph + glyphCount;
TTGlyphID glyphCode = (TTGlyphID) LE_GET_GLYPH(gid);
if ((glyphCode >= firstGlyph) && (glyphCode < lastGlyph)) {
LEReferenceToArrayOf<LookupValue> valueArray(lookupTable8, success, &lookupTable8->valueArray[0], glyphCount);
newGlyph = SWAPW(valueArray(glyphCode - firstGlyph, success));
}
}
default:
break;
}
return newGlyph;
}
void ContextualGlyphSubstitutionProcessor2::endStateTable()
{
}
U_NAMESPACE_END
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