le_uint32 ContextualSubstitutionFormat2Subtable::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) {
const ClassDefinitionTable *classDefinitionTable =
(const ClassDefinitionTable *) ((char *) this + SWAPW(classDefTableOffset));
le_uint16 scSetCount = SWAPW(subClassSetCount);
le_int32 setClass = classDefinitionTable->getGlyphClass(glyphIterator->getCurrGlyphID());
if (setClass < scSetCount && subClassSetTableOffsetArray[setClass] != 0) {
Offset subClassSetTableOffset = SWAPW(subClassSetTableOffsetArray[setClass]);
const SubClassSetTable *subClassSetTable =
(const SubClassSetTable *) ((char *) this + subClassSetTableOffset);
le_uint16 subClassRuleCount = SWAPW(subClassSetTable->subClassRuleCount);
le_int32 position = glyphIterator->getCurrStreamPosition();
for (le_uint16 scRule = 0; scRule < subClassRuleCount; scRule += 1) {
Offset subClassRuleTableOffset =
SWAPW(subClassSetTable->subClassRuleTableOffsetArray[scRule]);
const SubClassRuleTable *subClassRuleTable =
(const SubClassRuleTable *) ((char *) subClassSetTable + subClassRuleTableOffset);
le_uint16 matchCount = SWAPW(subClassRuleTable->glyphCount) - 1;
le_uint16 substCount = SWAPW(subClassRuleTable->substCount);
if (matchGlyphClasses(subClassRuleTable->classArray, matchCount, glyphIterator, classDefinitionTable)) {
const SubstitutionLookupRecord *substLookupRecordArray =
(const SubstitutionLookupRecord *) &subClassRuleTable->classArray[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 ChainingContextualSubstitutionFormat2Subtable::process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator,
const LEFontInstance *fontInstance) const
{
LEGlyphID glyph = (LEGlyphID) glyphIterator->getCurrGlyphID();
le_int32 coverageIndex = getGlyphCoverage(glyph);
if (coverageIndex >= 0) {
const ClassDefinitionTable *backtrackClassDefinitionTable =
(const ClassDefinitionTable *) ((char *) this + SWAPW(backtrackClassDefTableOffset));
const ClassDefinitionTable *inputClassDefinitionTable =
(const ClassDefinitionTable *) ((char *) this + SWAPW(inputClassDefTableOffset));
const ClassDefinitionTable *lookaheadClassDefinitionTable =
(const ClassDefinitionTable *) ((char *) this + SWAPW(lookaheadClassDefTableOffset));
le_uint16 scSetCount = SWAPW(chainSubClassSetCount);
le_int32 setClass = inputClassDefinitionTable->getGlyphClass((LEGlyphID) glyphIterator->getCurrGlyphID());
if (setClass < scSetCount && chainSubClassSetTableOffsetArray[setClass] != 0) {
Offset chainSubClassSetTableOffset = SWAPW(chainSubClassSetTableOffsetArray[setClass]);
const ChainSubClassSetTable *chainSubClassSetTable =
(const ChainSubClassSetTable *) ((char *) this + chainSubClassSetTableOffset);
le_uint16 chainSubClassRuleCount = SWAPW(chainSubClassSetTable->chainSubClassRuleCount);
le_int32 position = glyphIterator->getCurrStreamPosition();
GlyphIterator tempIterator(*glyphIterator);
for (le_uint16 scRule = 0; scRule < chainSubClassRuleCount; scRule += 1) {
Offset chainSubClassRuleTableOffset =
SWAPW(chainSubClassSetTable->chainSubClassRuleTableOffsetArray[scRule]);
const ChainSubClassRuleTable *chainSubClassRuleTable =
(const ChainSubClassRuleTable *) ((char *) chainSubClassSetTable + chainSubClassRuleTableOffset);
le_uint16 backtrackGlyphCount = SWAPW(chainSubClassRuleTable->backtrackGlyphCount);
le_uint16 inputGlyphCount = SWAPW(chainSubClassRuleTable->backtrackClassArray[backtrackGlyphCount]) - 1;
const le_uint16 *inputClassArray = &chainSubClassRuleTable->backtrackClassArray[backtrackGlyphCount + 1];
le_uint16 lookaheadGlyphCount = SWAPW(inputClassArray[inputGlyphCount]);
const le_uint16 *lookaheadClassArray = &inputClassArray[inputGlyphCount + 1];
le_uint16 substCount = SWAPW(lookaheadClassArray[lookaheadGlyphCount]);
tempIterator.setCurrStreamPosition(position);
tempIterator.prev(backtrackGlyphCount + 1);
if (! matchGlyphClasses(chainSubClassRuleTable->backtrackClassArray, backtrackGlyphCount,
&tempIterator, backtrackClassDefinitionTable)) {
continue;
}
tempIterator.setCurrStreamPosition(position);
tempIterator.next(inputGlyphCount);
if (! matchGlyphClasses(lookaheadClassArray, lookaheadGlyphCount, &tempIterator, lookaheadClassDefinitionTable)) {
continue;
}
if (matchGlyphClasses(inputClassArray, inputGlyphCount, glyphIterator, inputClassDefinitionTable)) {
const SubstitutionLookupRecord *substLookupRecordArray =
(const SubstitutionLookupRecord *) &lookaheadClassArray[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 ChainingContextualSubstitutionFormat2Subtable::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) {
LEReferenceTo<ClassDefinitionTable>
backtrackClassDefinitionTable(base, success, SWAPW(backtrackClassDefTableOffset));
LEReferenceTo<ClassDefinitionTable>
inputClassDefinitionTable(base, success, SWAPW(inputClassDefTableOffset));
LEReferenceTo<ClassDefinitionTable>
lookaheadClassDefinitionTable(base, success, SWAPW(lookaheadClassDefTableOffset));
le_uint16 scSetCount = SWAPW(chainSubClassSetCount);
le_int32 setClass = inputClassDefinitionTable->getGlyphClass(inputClassDefinitionTable,
glyphIterator->getCurrGlyphID(),
success);
LEReferenceToArrayOf<Offset>
chainSubClassSetTableOffsetArrayRef(base, success, chainSubClassSetTableOffsetArray, scSetCount);
if (LE_FAILURE(success)) {
return 0;
}
if (setClass < scSetCount && chainSubClassSetTableOffsetArray[setClass] != 0) {
Offset chainSubClassSetTableOffset = SWAPW(chainSubClassSetTableOffsetArray[setClass]);
LEReferenceTo<ChainSubClassSetTable>
chainSubClassSetTable(base, success, chainSubClassSetTableOffset);
if (LE_FAILURE(success)) { return 0; }
le_uint16 chainSubClassRuleCount = SWAPW(chainSubClassSetTable->chainSubClassRuleCount);
le_int32 position = glyphIterator->getCurrStreamPosition();
GlyphIterator tempIterator(*glyphIterator, emptyFeatureList);
LEReferenceToArrayOf<Offset>
chainSubClassRuleTableOffsetArrayRef(base, success, chainSubClassSetTable->chainSubClassRuleTableOffsetArray, chainSubClassRuleCount);
if (LE_FAILURE(success)) {
return 0;
}
for (le_uint16 scRule = 0; scRule < chainSubClassRuleCount; scRule += 1) {
Offset chainSubClassRuleTableOffset =
SWAPW(chainSubClassSetTable->chainSubClassRuleTableOffsetArray[scRule]);
LEReferenceTo<ChainSubClassRuleTable>
chainSubClassRuleTable(chainSubClassSetTable, success, chainSubClassRuleTableOffset);
if (LE_FAILURE(success)) { return 0; }
le_uint16 backtrackGlyphCount = SWAPW(chainSubClassRuleTable->backtrackGlyphCount);
LEReferenceToArrayOf<le_uint16> backtrackClassArray(base, success, chainSubClassRuleTable->backtrackClassArray, backtrackGlyphCount);
if( LE_FAILURE(success) ) { return 0; }
le_uint16 inputGlyphCount = SWAPW(chainSubClassRuleTable->backtrackClassArray[backtrackGlyphCount]) - 1;
LEReferenceToArrayOf<le_uint16> inputClassArray(base, success, &chainSubClassRuleTable->backtrackClassArray[backtrackGlyphCount + 1],inputGlyphCount+2); // +2 for the lookaheadGlyphCount count
le_uint16 lookaheadGlyphCount = SWAPW(inputClassArray.getObject(inputGlyphCount, success));
LEReferenceToArrayOf<le_uint16> lookaheadClassArray(base, success, inputClassArray.getAlias(inputGlyphCount + 1,success), lookaheadGlyphCount+2); // +2 for the substCount
if( LE_FAILURE(success) ) { return 0; }
le_uint16 substCount = SWAPW(lookaheadClassArray[lookaheadGlyphCount]);
tempIterator.setCurrStreamPosition(position);
if (! tempIterator.prev(backtrackGlyphCount)) {
continue;
}
tempIterator.prev();
if (! matchGlyphClasses(backtrackClassArray, backtrackGlyphCount,
&tempIterator, backtrackClassDefinitionTable, success, TRUE)) {
continue;
}
tempIterator.setCurrStreamPosition(position);
tempIterator.next(inputGlyphCount);
if (! matchGlyphClasses(lookaheadClassArray, lookaheadGlyphCount, &tempIterator, lookaheadClassDefinitionTable, success)) {
continue;
}
if (matchGlyphClasses(inputClassArray, inputGlyphCount, glyphIterator, inputClassDefinitionTable, success)) {
LEReferenceToArrayOf<SubstitutionLookupRecord>
substLookupRecordArray(base, success, (const SubstitutionLookupRecord *) lookaheadClassArray.getAlias(lookaheadGlyphCount + 1, success), substCount);
if (LE_FAILURE(success)) { return 0; }
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 ContextualSubstitutionFormat2Subtable::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) {
LEReferenceTo<ClassDefinitionTable> classDefinitionTable(base, success, SWAPW(classDefTableOffset));
if (LE_FAILURE(success)) { return 0; }
le_uint16 scSetCount = SWAPW(subClassSetCount);
le_int32 setClass = classDefinitionTable->getGlyphClass(classDefinitionTable,
glyphIterator->getCurrGlyphID(),
success);
if (setClass < scSetCount) {
LEReferenceToArrayOf<Offset>
subClassSetTableOffsetArrayRef(base, success, subClassSetTableOffsetArray, scSetCount);
if (LE_FAILURE(success)) { return 0; }
if (subClassSetTableOffsetArray[setClass] != 0) {
Offset subClassSetTableOffset = SWAPW(subClassSetTableOffsetArray[setClass]);
LEReferenceTo<SubClassSetTable> subClassSetTable(base, success, subClassSetTableOffset);
if (LE_FAILURE(success)) { return 0; }
le_uint16 subClassRuleCount = SWAPW(subClassSetTable->subClassRuleCount);
le_int32 position = glyphIterator->getCurrStreamPosition();
LEReferenceToArrayOf<Offset>
subClassRuleTableOffsetArrayRef(base, success, subClassSetTable->subClassRuleTableOffsetArray, subClassRuleCount);
if (LE_FAILURE(success)) {
return 0;
}
for (le_uint16 scRule = 0; scRule < subClassRuleCount; scRule += 1) {
Offset subClassRuleTableOffset =
SWAPW(subClassSetTable->subClassRuleTableOffsetArray[scRule]);
LEReferenceTo<SubClassRuleTable>
subClassRuleTable(subClassSetTable, success, subClassRuleTableOffset);
if (LE_FAILURE(success)) { return 0; }
le_uint16 matchCount = SWAPW(subClassRuleTable->glyphCount) - 1;
le_uint16 substCount = SWAPW(subClassRuleTable->substCount);
LEReferenceToArrayOf<le_uint16> classArray(base, success, subClassRuleTable->classArray, matchCount+1);
if (LE_FAILURE(success)) { return 0; }
if (matchGlyphClasses(classArray, matchCount, glyphIterator, classDefinitionTable, success)) {
LEReferenceToArrayOf<SubstitutionLookupRecord>
substLookupRecordArray(base, success, (const SubstitutionLookupRecord *) &subClassRuleTable->classArray[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;
}
