le_uint32 ChainingContextualSubstitutionFormat1Subtable::process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator,
const LEFontInstance *fontInstance) const
{
LEGlyphID glyph = (LEGlyphID) glyphIterator->getCurrGlyphID();
le_int32 coverageIndex = getGlyphCoverage(glyph);
if (coverageIndex >= 0) {
le_uint16 srSetCount = SWAPW(chainSubRuleSetCount);
if (coverageIndex < srSetCount) {
Offset chainSubRuleSetTableOffset = SWAPW(chainSubRuleSetTableOffsetArray[coverageIndex]);
const ChainSubRuleSetTable *chainSubRuleSetTable =
(const ChainSubRuleSetTable *) ((char *) this + chainSubRuleSetTableOffset);
le_uint16 chainSubRuleCount = SWAPW(chainSubRuleSetTable->chainSubRuleCount);
le_int32 position = glyphIterator->getCurrStreamPosition();
GlyphIterator tempIterator(*glyphIterator);
for (le_uint16 subRule = 0; subRule < chainSubRuleCount; subRule += 1) {
Offset chainSubRuleTableOffset =
SWAPW(chainSubRuleSetTable->chainSubRuleTableOffsetArray[subRule]);
const ChainSubRuleTable *chainSubRuleTable =
(const ChainSubRuleTable *) ((char *) chainSubRuleSetTable + chainSubRuleTableOffset);
le_uint16 backtrackGlyphCount = SWAPW(chainSubRuleTable->backtrackGlyphCount);
le_uint16 inputGlyphCount = (le_uint16) SWAPW(chainSubRuleTable->backtrackGlyphArray[backtrackGlyphCount]) - 1;
const LEGlyphID *inputGlyphArray = &chainSubRuleTable->backtrackGlyphArray[backtrackGlyphCount + 1];
le_uint16 lookaheadGlyphCount = (le_uint16) SWAPW(inputGlyphArray[inputGlyphCount]);
const LEGlyphID *lookaheadGlyphArray = &inputGlyphArray[inputGlyphCount + 1];
le_uint16 substCount = (le_uint16) SWAPW(lookaheadGlyphArray[lookaheadGlyphCount]);
tempIterator.setCurrStreamPosition(position);
tempIterator.prev(backtrackGlyphCount + 1);
if (! matchGlyphIDs(chainSubRuleTable->backtrackGlyphArray, backtrackGlyphCount, &tempIterator)) {
continue;
}
tempIterator.setCurrStreamPosition(position);
tempIterator.next(inputGlyphCount);
if (!matchGlyphIDs(lookaheadGlyphArray, lookaheadGlyphCount, &tempIterator)) {
continue;
}
if (matchGlyphIDs(inputGlyphArray, inputGlyphCount, glyphIterator)) {
const SubstitutionLookupRecord *substLookupRecordArray =
(const SubstitutionLookupRecord *) &lookaheadGlyphArray[lookaheadGlyphCount + 1];
applySubstitutionLookups(lookupProcessor, substLookupRecordArray, substCount, glyphIterator, fontInstance, position);
return inputGlyphCount + 1;
}
glyphIterator->setCurrStreamPosition(position);
}
}
// XXX If we get here, the table is mal-formed...
}
return 0;
}
le_uint32 ContextualSubstitutionFormat1Subtable::process(const LookupProcessor *lookupProcessor,
GlyphIterator *glyphIterator,
const LEFontInstance *fontInstance,
LEErrorCode& success) const
{
if (LE_FAILURE(success)) {
return 0;
}
LEGlyphID glyph = glyphIterator->getCurrGlyphID();
le_int32 coverageIndex = getGlyphCoverage(glyph);
if (coverageIndex >= 0) {
le_uint16 srSetCount = SWAPW(subRuleSetCount);
if (coverageIndex < srSetCount) {
Offset subRuleSetTableOffset = SWAPW(subRuleSetTableOffsetArray[coverageIndex]);
const SubRuleSetTable *subRuleSetTable =
(const SubRuleSetTable *) ((char *) this + subRuleSetTableOffset);
le_uint16 subRuleCount = SWAPW(subRuleSetTable->subRuleCount);
le_int32 position = glyphIterator->getCurrStreamPosition();
for (le_uint16 subRule = 0; subRule < subRuleCount; subRule += 1) {
Offset subRuleTableOffset =
SWAPW(subRuleSetTable->subRuleTableOffsetArray[subRule]);
const SubRuleTable *subRuleTable =
(const SubRuleTable *) ((char *) subRuleSetTable + subRuleTableOffset);
le_uint16 matchCount = SWAPW(subRuleTable->glyphCount) - 1;
le_uint16 substCount = SWAPW(subRuleTable->substCount);
if (matchGlyphIDs(subRuleTable->inputGlyphArray, matchCount, glyphIterator)) {
const SubstitutionLookupRecord *substLookupRecordArray =
(const SubstitutionLookupRecord *) &subRuleTable->inputGlyphArray[matchCount];
applySubstitutionLookups(lookupProcessor, substLookupRecordArray, substCount, glyphIterator, fontInstance, position, success);
return matchCount + 1;
}
glyphIterator->setCurrStreamPosition(position);
}
}
// XXX If we get here, the table is mal-formed...
}
return 0;
}
le_uint32 ChainingContextualSubstitutionFormat1Subtable::process(const LETableReference &base, const LookupProcessor *lookupProcessor,
GlyphIterator *glyphIterator,
const LEFontInstance *fontInstance,
LEErrorCode& success) const
{
if (LE_FAILURE(success)) {
return 0;
}
LEGlyphID glyph = glyphIterator->getCurrGlyphID();
le_int32 coverageIndex = getGlyphCoverage(lookupProcessor->getReference(), glyph, success);
if (LE_FAILURE(success)) {
return 0;
}
if (coverageIndex >= 0) {
le_uint16 srSetCount = SWAPW(chainSubRuleSetCount);
if (coverageIndex < srSetCount) {
LEReferenceToArrayOf<Offset>
chainSubRuleSetTableOffsetArrayRef(base, success, chainSubRuleSetTableOffsetArray, srSetCount);
if (LE_FAILURE(success)) {
return 0;
}
Offset chainSubRuleSetTableOffset = SWAPW(chainSubRuleSetTableOffsetArray[coverageIndex]);
LEReferenceTo<ChainSubRuleSetTable> chainSubRuleSetTable(base, success, chainSubRuleSetTableOffset);
if (LE_FAILURE(success)) { return 0; }
le_uint16 chainSubRuleCount = SWAPW(chainSubRuleSetTable->chainSubRuleCount);
le_int32 position = glyphIterator->getCurrStreamPosition();
GlyphIterator tempIterator(*glyphIterator, emptyFeatureList);
LEReferenceToArrayOf<Offset>
chainSubRuleTableOffsetArrayRef(base, success, chainSubRuleSetTable->chainSubRuleTableOffsetArray, chainSubRuleCount);
if (LE_FAILURE(success)) {
return 0;
}
for (le_uint16 subRule = 0; subRule < chainSubRuleCount; subRule += 1) {
Offset chainSubRuleTableOffset =
SWAPW(chainSubRuleSetTable->chainSubRuleTableOffsetArray[subRule]);
LEReferenceTo<ChainSubRuleTable>
chainSubRuleTable = LEReferenceTo<ChainSubRuleTable>(chainSubRuleSetTable, success, chainSubRuleTableOffset);
if( LE_FAILURE(success) ) { return 0; }
le_uint16 backtrackGlyphCount = SWAPW(chainSubRuleTable->backtrackGlyphCount);
LEReferenceToArrayOf<TTGlyphID> backtrackGlyphArray(base, success, chainSubRuleTable->backtrackGlyphArray, backtrackGlyphCount);
if( LE_FAILURE(success) ) { return 0; }
le_uint16 inputGlyphCount = (le_uint16) SWAPW(chainSubRuleTable->backtrackGlyphArray[backtrackGlyphCount]) - 1;
LEReferenceToArrayOf<TTGlyphID> inputGlyphArray(base, success, &chainSubRuleTable->backtrackGlyphArray[backtrackGlyphCount + 1], inputGlyphCount+2);
if( LE_FAILURE(success) ) { return 0; }
le_uint16 lookaheadGlyphCount = (le_uint16) SWAPW(inputGlyphArray[inputGlyphCount]);
LEReferenceToArrayOf<TTGlyphID> lookaheadGlyphArray(base, success, inputGlyphArray.getAlias(inputGlyphCount + 1,success), lookaheadGlyphCount+2);
if( LE_FAILURE(success) ) { return 0; }
le_uint16 substCount = (le_uint16) SWAPW(lookaheadGlyphArray[lookaheadGlyphCount]);
tempIterator.setCurrStreamPosition(position);
if (! tempIterator.prev(backtrackGlyphCount)) {
continue;
}
tempIterator.prev();
if (! matchGlyphIDs(backtrackGlyphArray, backtrackGlyphCount, &tempIterator, TRUE)) {
continue;
}
tempIterator.setCurrStreamPosition(position);
tempIterator.next(inputGlyphCount);
if (!matchGlyphIDs(lookaheadGlyphArray, lookaheadGlyphCount, &tempIterator)) {
continue;
}
if (matchGlyphIDs(inputGlyphArray, inputGlyphCount, glyphIterator)) {
LEReferenceToArrayOf<SubstitutionLookupRecord>
substLookupRecordArray(base, success, (const SubstitutionLookupRecord *) lookaheadGlyphArray.getAlias(lookaheadGlyphCount + 1,success), substCount);
applySubstitutionLookups(lookupProcessor, substLookupRecordArray, substCount, glyphIterator, fontInstance, position, success);
return inputGlyphCount + 1;
}
glyphIterator->setCurrStreamPosition(position);
}
}
// XXX If we get here, the table is mal-formed...
}
return 0;
}
le_uint32 ContextualSubstitutionFormat1Subtable::process(const LETableReference &base, const LookupProcessor *lookupProcessor,
GlyphIterator *glyphIterator,
const LEFontInstance *fontInstance,
LEErrorCode& success) const
{
if (LE_FAILURE(success)) {
return 0;
}
LEGlyphID glyph = glyphIterator->getCurrGlyphID();
le_int32 coverageIndex = getGlyphCoverage(lookupProcessor->getReference(), glyph, success);
if (LE_FAILURE(success)) {
return 0;
}
if (coverageIndex >= 0) {
le_uint16 srSetCount = SWAPW(subRuleSetCount);
if (coverageIndex < srSetCount) {
LEReferenceToArrayOf<Offset>
subRuleSetTableOffsetArrayRef(base, success, subRuleSetTableOffsetArray, srSetCount);
if (LE_FAILURE(success)) {
return 0;
}
Offset subRuleSetTableOffset = SWAPW(subRuleSetTableOffsetArray[coverageIndex]);
LEReferenceTo<SubRuleSetTable> subRuleSetTable(base, success, subRuleSetTableOffset);
if (LE_FAILURE(success)) { return 0; }
le_uint16 subRuleCount = SWAPW(subRuleSetTable->subRuleCount);
le_int32 position = glyphIterator->getCurrStreamPosition();
LEReferenceToArrayOf<Offset> subRuleTableOffsetArrayRef(base, success,
subRuleSetTable->subRuleTableOffsetArray, subRuleCount);
if (LE_FAILURE(success)) {
return 0;
}
for (le_uint16 subRule = 0; subRule < subRuleCount; subRule += 1) {
Offset subRuleTableOffset =
SWAPW(subRuleSetTable->subRuleTableOffsetArray[subRule]);
LEReferenceTo<SubRuleTable>
subRuleTable(subRuleSetTable, success, subRuleTableOffset);
if (LE_FAILURE(success)) { return 0; }
le_uint16 matchCount = SWAPW(subRuleTable->glyphCount) - 1;
le_uint16 substCount = SWAPW(subRuleTable->substCount);
LEReferenceToArrayOf<TTGlyphID> inputGlyphArray(base, success, subRuleTable->inputGlyphArray, matchCount+2);
if (LE_FAILURE(success)) { return 0; }
if (matchGlyphIDs(inputGlyphArray, matchCount, glyphIterator)) {
LEReferenceToArrayOf<SubstitutionLookupRecord>
substLookupRecordArray(base, success, (const SubstitutionLookupRecord *) &subRuleTable->inputGlyphArray[matchCount], substCount);
applySubstitutionLookups(lookupProcessor, substLookupRecordArray, substCount, glyphIterator, fontInstance, position, success);
return matchCount + 1;
}
glyphIterator->setCurrStreamPosition(position);
}
}
// XXX If we get here, the table is mal-formed...
}
return 0;
}
