protected override void ReadValue(PsdReader reader, object userData, out FileHeaderSection value)
{
value = new FileHeaderSection();
value.NumberOfChannels = reader.ReadInt16();
value.Height = reader.ReadInt32();
value.Width = reader.ReadInt32();
value.Depth = reader.ReadInt16();
value.ColorMode = reader.ReadColorMode();
if (value.Depth != 8)
{
throw new NotSupportedException("only support 8 Bit Channel");
}
}