/// <summary>
/// Gets the language system table.
/// </summary>
/// <param name="script">The script tag.</param>
/// <param name="langSys">The language system tag.</param>
/// <param name="fontTable">The font table.</param>
/// <returns>Language system table</returns>
private dynamic GetLangSysTable(Tag script, Tag langSys, dynamic fontTable)
{
dynamic fontTableHeader = this.GetFontTableHeader();
dynamic scriptList = new AccessPrivateWrapper(fontTableHeader.GetScriptList(fontTable.Wrapped));
dynamic scriptTable = new AccessPrivateWrapper(scriptList.FindScript(fontTable.Wrapped, TagConverter.UintFromTag(script)));
if (scriptTable.IsNull)
{
throw new ArgumentOutOfRangeException("script");
}
dynamic langSysTable = langSys == null ?
new AccessPrivateWrapper(scriptTable.GetDefaultLangSysTable(fontTable.Wrapped)) :
new AccessPrivateWrapper(scriptTable.FindLangSys(fontTable.Wrapped, TagConverter.UintFromTag(langSys)));
if (langSysTable.IsNull)
{
throw new ArgumentOutOfRangeException("langSys");
}
return(langSysTable);
}