public bool TryGetTable(OTTag tag, out OTTable table)
{
uint?idx = _offsetTable.GetTableRecordIndex(tag);
if (idx.HasValue)
{
table = _tables[idx.Value];
return(true);
}
else
{
table = null;
return(false);
}
}
private void ReadFont_Internal(MemoryStream ms)
{
// results in Offset table for font being read, but no other tables
// assumed: _offsetInFile has already been set and validated as in bounds
try
{
_offsetTable.ReadOffsetTable(ms, _offsetInFile);
}
catch (OTTableParseException e)
{
throw new OTFontParseException("Unable to parse font data", e);
}
// Offset table for font has been read; we know how many and what kind
// of tables.
_tables = new OTTable[_offsetTable.NumTables]; // initialized with entries == null
_validationStatusOfTables = new UInt64[_offsetTable.NumTables]; // initialized with entries == NotValidated
// The following is something temporary: populate an array of OTTable objects
// passing each its offset table record. The record is all that's needed to
// parse each table; but once an object is created (OTTable), it can't change
// itself into a different type; it can only be substituted with a different
// type of object, and that substitution would have to be done by something
// else.
for (int i = 0; i < _offsetTable.NumTables; i++)
{
if (OTFont.IsSupportedTableType(_offsetTable.TableRecords[i].Tag))
{
switch (_offsetTable.TableRecords[i].Tag.ToString())
{
case "COLR":
_tables[i] = new TableColr(this, _offsetTable.TableRecords[i]);
break;
case "fmtx":
_tables[i] = new TableFmtx(this, _offsetTable.TableRecords[i]);
break;
case "head":
_tables[i] = new TableHead(this, _offsetTable.TableRecords[i]);
break;
case "hhea":
_tables[i] = new TableHhea(this, _offsetTable.TableRecords[i]);
break;
case "maxp":
_tables[i] = new TableMaxp(this, _offsetTable.TableRecords[i]);
break;
}
}
else
{
_tables[i] = new OTTable(this, _offsetTable.TableRecords[i]);
}
}
} // ReadFont_Internal