public byte[] GetStateUpdateMessage()
{
byte[] message;
MessageHeader msgHeader = new MessageHeader()
{
Type = MessageHeader.MessageType.Input
};
MemoryStream stream = new MemoryStream();
using (BinaryWriter writer = new BinaryWriter(stream))
{
writer.Write((byte)msgHeader.Type);
writer.Write(msgHeader.Length);
ReadOnlySpan <ushort> axes = Axes.GetUpdatedValues();
if (axes != null)
{
writer.Write((byte)UsageId.Axis);
writer.Write(Axes.ArrayMap);
writer.Write(MemoryMarshal.Cast <ushort, byte>(axes));
}
ReadOnlySpan <ushort> buttons = Buttons.GetUpdatedValues();
if (buttons != null)
{
writer.Write((byte)UsageId.Button);
writer.Write(Buttons.ArrayMap);
writer.Write(MemoryMarshal.Cast <ushort, byte>(buttons));
}
ReadOnlySpan <byte> dpads = DPads.GetUpdatedValues();
if (dpads != null)
{
writer.Write((byte)UsageId.DPad);
writer.Write(DPads.ArrayMap);
writer.Write(dpads);
}
message = stream.ToArray();
}
if (message.Length > MessageLengthMax)
{
throw new ArgumentException(Resources.ErrorMessageLengthMax);
}
else if (message.Length < 3)
{
return(null);
}
// We change the MessageHeader.Length to the MessageLength;
message[1] = (byte)(message.Length - MessageHeaderLength);
CreateDefaultState();
return(message);
}
public void CreateDefaultState()
{
Axes = new Axes();
Buttons = new Buttons();
DPads = new DPads();
}
