/// <summary>
/// read only name entry
/// </summary>
/// <param name="stream"></param>
/// <returns></returns>
public PreviewFontInfo ReadPreview(Stream stream)
{
//var little = BitConverter.IsLittleEndian;
using (var input = new ByteOrderSwappingBinaryReader(stream))
{
ushort majorVersion = input.ReadUInt16();
ushort minorVersion = input.ReadUInt16();
if (KnownFontFiles.IsTtcf(majorVersion, minorVersion))
{
//this font stream is 'The Font Collection'
FontCollectionHeader ttcHeader = ReadTTCHeader(input);
PreviewFontInfo[] members = new PreviewFontInfo[ttcHeader.numFonts];
for (uint i = 0; i < ttcHeader.numFonts; ++i)
{
input.BaseStream.Seek(ttcHeader.offsetTables[i], SeekOrigin.Begin);
PreviewFontInfo member = members[i] = ReadActualFontPreview(input, false);
member.ActualStreamOffset = ttcHeader.offsetTables[i];
}
return(new PreviewFontInfo(BuildTtcfName(members), members));
}
else if (KnownFontFiles.IsWoff(majorVersion, minorVersion))
{
//check if we enable woff or not
WebFont.WoffReader woffReader = new WebFont.WoffReader();
input.BaseStream.Position = 0;
return(woffReader.ReadPreview(input));
}
else if (KnownFontFiles.IsWoff2(majorVersion, minorVersion))
{
//check if we enable woff2 or not
WebFont.Woff2Reader woffReader = new WebFont.Woff2Reader();
input.BaseStream.Position = 0;
return(woffReader.ReadPreview(input));
}
else
{
return(ReadActualFontPreview(input, true));//skip version data (majorVersion, minorVersion)
}
}
}