protected virtual List <IFontInfo> ReadCollection(BigEndianReader reader, string source)
{
var header = TTCHeader.ReadHeader(reader, this);
List <IFontInfo> found = new List <IFontInfo>();
for (int f = 0; f < header.NumFonts; f++)
{
TypefaceVersionReader innerVers;
reader.Position = header.FontOffsets[f];
if (TryGetVersion(reader, out innerVers))
{
var info = innerVers.ReadTypefaceInfoAfterVersion(reader, source);
if (info is Utility.SingleTypefaceInfo sti)
{
sti.OffsetInFile = header.FontOffsets[f];
}
if (null != info && info.FontCount == 1)
{
found.Add(info.Fonts[0]);
}
}
}
return(found);
}
internal static bool TryReadHeader(BigEndianReader reader, out TTCHeader header)
{
header = null;
TypefaceVersionReader vers;
if (TypefaceVersionReader.TryGetVersion(reader, out vers) == false)
{
return(false);
}
else if (vers is TTCollectionVersionReader ttc)
{
header = ReadHeader(reader, ttc);
}
else
{
return(false);
}
return(null != header);
}