U_NAMESPACE_BEGIN
le_uint32 PairPositioningSubtable::process(const LEReferenceTo<PairPositioningSubtable> &base, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode &success) const
{
switch(SWAPW(subtableFormat))
{
case 0:
return 0;
case 1:
{
const LEReferenceTo<PairPositioningFormat1Subtable> subtable(base, success, (const PairPositioningFormat1Subtable *) this);
if(LE_SUCCESS(success))
return subtable->process(subtable, glyphIterator, fontInstance, success);
else
return 0;
}
case 2:
{
const LEReferenceTo<PairPositioningFormat2Subtable> subtable(base, success, (const PairPositioningFormat2Subtable *) this);
if(LE_SUCCESS(success))
return subtable->process(subtable, glyphIterator, fontInstance, success);
else
return 0;
}
default:
return 0;
}
}
U_NAMESPACE_BEGIN
le_uint32 SingleSubstitutionSubtable::process(const LEReferenceTo<SingleSubstitutionSubtable> &base, GlyphIterator *glyphIterator, LEErrorCode &success, const LEGlyphFilter *filter) const
{
switch(SWAPW(subtableFormat))
{
case 0:
return 0;
case 1:
{
const LEReferenceTo<SingleSubstitutionFormat1Subtable> subtable(base, success, (const SingleSubstitutionFormat1Subtable *) this);
return subtable->process(subtable, glyphIterator, success, filter);
}
case 2:
{
const LEReferenceTo<SingleSubstitutionFormat2Subtable> subtable(base, success, (const SingleSubstitutionFormat2Subtable *) this);
return subtable->process(subtable, glyphIterator, success, filter);
}
default:
return 0;
}
}
U_NAMESPACE_BEGIN
void MorphTableHeader::process(const LETableReference &base, LEGlyphStorage &glyphStorage, LEErrorCode &success) const
{
le_uint32 chainCount = SWAPL(this->nChains);
LEReferenceTo<ChainHeader> chainHeader(base, success, chains); // moving header
LEReferenceToArrayOf<ChainHeader> chainHeaderArray(base, success, chains, chainCount);
le_uint32 chain;
for (chain = 0; LE_SUCCESS(success) && (chain < chainCount); chain += 1) {
if (chain > 0) {
le_uint32 chainLength = SWAPL(chainHeader->chainLength);
if (chainLength & 0x03) { // incorrect alignment for 32 bit tables
success = LE_MEMORY_ALLOCATION_ERROR; // as good a choice as any
return;
}
chainHeader.addOffset(chainLength, success);
}
FeatureFlags defaultFlags = SWAPL(chainHeader->defaultFlags);
le_int16 nFeatureEntries = SWAPW(chainHeader->nFeatureEntries);
le_int16 nSubtables = SWAPW(chainHeader->nSubtables);
LEReferenceTo<MorphSubtableHeader> subtableHeader =
LEReferenceTo<MorphSubtableHeader>(chainHeader,success, &(chainHeader->featureTable[nFeatureEntries]));
le_int16 subtable;
for (subtable = 0; LE_SUCCESS(success) && (subtable < nSubtables); subtable += 1) {
if (subtable > 0) {
le_int16 length = SWAPW(subtableHeader->length);
if (length & 0x03) { // incorrect alignment for 32 bit tables
success = LE_MEMORY_ALLOCATION_ERROR; // as good a choice as any
return;
}
subtableHeader.addOffset(length, success);
}
SubtableCoverage coverage = SWAPW(subtableHeader->coverage);
FeatureFlags subtableFeatures = SWAPL(subtableHeader->subtableFeatures);
// should check coverage more carefully...
if ((coverage & scfVertical) == 0 && (subtableFeatures & defaultFlags) != 0 && LE_SUCCESS(success)) {
subtableHeader->process(subtableHeader, glyphStorage, success);
}
}
}
}
