public static Format4SubTable Read(ushort format, BinaryReader reader)
{
var instance = new Format4SubTable
{
Format = format,
Length = reader.ReadUInt16BigEndian(),
Language = reader.ReadUInt16BigEndian(),
SegCountX2 = reader.ReadUInt16BigEndian()
};
int segCount = instance.SegCountX2 / 2;
instance.SearchRange = reader.ReadUInt16BigEndian();
instance.EntrySelector = reader.ReadUInt16BigEndian();
instance.RangeShift = reader.ReadUInt16BigEndian();
instance.EndCode = reader.ReadUInt16BigEndianArray(segCount);
instance.ReservedPad = reader.ReadUInt16BigEndian();
instance.StartCode = reader.ReadUInt16BigEndianArray(segCount);
instance.IdDelta = reader.ReadInt16BigEndianArray(segCount);
instance.IdRangeOffset = reader.ReadUInt16BigEndianArray(segCount);
var glyphIdArrayLength = (instance.Length - (16 + segCount * 8)) / 2;
instance.GlyphIdArray = reader.ReadUInt16BigEndianArray(glyphIdArrayLength);
return(instance);
}
public static CharacterMapTable Read(BinaryReader reader)
{
var tableOffset = reader.BaseStream.Position;
var instance = new CharacterMapTable
{
Version = reader.ReadUInt16BigEndian(),
NumTables = reader.ReadUInt16BigEndian(),
EncodingRecords = new List <EncodingRecord>()
};
for (int i = 0; i < instance.NumTables; i++)
{
instance.EncodingRecords.Add(EncodingRecord.Read(reader));
}
instance.EncodingFormats = new Dictionary <EncodingRecord, int>();
instance.Encodings = new Dictionary <EncodingRecord, FormatSubTableBase>();
for (int i = 0; i < instance.EncodingRecords.Count; i++)
{
var encodingRecord = instance.EncodingRecords[i];
reader.BaseStream.Seek(tableOffset + encodingRecord.Offset, SeekOrigin.Begin);
var format = reader.ReadUInt16BigEndian();
instance.EncodingFormats[encodingRecord] = format;
if (format == 4)
{
instance.Encodings[encodingRecord] = Format4SubTable.Read(format, reader);
}
else
{
//throw new FontReaderException($"Unsupported cmap Format Table format {format}");
}
}
return(instance);
}