/// <summary>
/// Gets a reference to the table structure identified by <i>tableName</i>
/// </summary>
/// <remarks>
/// Only the following tables are supported:
/// <see cref="TableNames.Head"/> - Font header,
/// <see cref="TableNames.Hhea"/> - Horizontal header,
/// <see cref="TableNames.Hmtx"/> - Horizontal metrics,
/// <see cref="TableNames.Maxp"/> - Maximum profile,
/// <see cref="TableNames.Loca"/> - Index to location,
/// <see cref="TableNames.Glyf"/> - Glyf data,
/// <see cref="TableNames.Cvt"/> - Control value,
/// <see cref="TableNames.Prep"/> - Control value program,
/// <see cref="TableNames.Fpgm"/> - Font program
/// </remarks>
/// <param name="tableName">A 4-character code identifying a table.</param>
/// <exception cref="ArgumentException">
/// If <b>tableName</b> does not represent a table in this font.
/// </exception>
internal FontTable GetTable(string tableName)
{
if (!ContainsTable(tableName))
{
throw new ArgumentException("Cannot locate table '" + tableName + "'", "tableName");
}
// Obtain from cache is present
if (tableCache.Contains(tableName))
{
return((FontTable)tableCache[tableName]);
}
// Otherwise instantiate appropriate FontTable subclass and parse
DirectoryEntry tableEntry = GetDictionaryEntry(tableName);
FontTable table = tableEntry.MakeTable(this);
if (table != null)
{
OffsetStream(tableEntry);
table.Read(this);
}
return(table);
}
