/* static */
uint64_t
SFNTData::GetUniqueKey(const uint8_t *aFontData, uint32_t aDataLength)
{
uint64_t hash;
UniquePtr<SFNTData> sfntData = SFNTData::Create(aFontData, aDataLength);
mozilla::u16string firstName;
if (sfntData && sfntData->GetU16FullName(0, firstName)) {
hash = HashString(firstName.c_str(), firstName.length());
} else {
gfxWarning() << "Failed to get name from font data hashing whole font.";
hash = HashString(aFontData, aDataLength);
}
return hash << 32 | aDataLength;;
}
bool GetU16FullName(mozilla::u16string& aU16FullName)
{
const TableDirEntry* dirEntry =
GetDirEntry(TRUETYPE_TAG('n', 'a', 'm', 'e'));
if (!dirEntry) {
gfxWarning() << "Name table entry not found.";
return false;
}
UniquePtr<SFNTNameTable> nameTable =
SFNTNameTable::Create((mFontData + dirEntry->offset), dirEntry->length);
if (!nameTable) {
return false;
}
return nameTable->GetU16FullName(aU16FullName);
}
