Question by Pitrees · Sep 04, 2020 at 09:51 AM · dots transport

Unity Transport API, how to writebytes & readbytes for texture data?

I'm trying to send texture/image bytes data to server. But keep getting ArgumentOutOfRangeException: Specified argument was out of the range of valid values. at stream.ReadBytes(array);

Please help guide me.

Client

 public void SendBytes(string title, Texture2D _tex)
 {
     if(!m_Connected)
         return;
         byte[] buffer = _tex.GetRawTextureData();
         var array = new NativeArray<byte>(buffer, Allocator.Temp);
         Debug.Log("Send bytes with Length " + array.Length);
         var writer = m_Driver.BeginSend(m_Connection);
         writer.WriteString((NativeString64)title);
         writer.WriteInt(array.Length);
         writer.WriteBytes(array);
         m_Driver.EndSend(writer);
 }

Server

 public void ProcessByteImage(DataStreamReader stream)
 {
 int bufferLength = stream.ReadInt();
 Debug.Log("Get bytes with Length " + bufferLength);
 Debug.Log("Stream Length = "+stream.Length);
 byte[] recBuffer = new byte[stream.Length];
 var array = new NativeArray(recBuffer, Allocator.Temp);
 
 stream.ReadBytes(array);
 recBuffer = array.ToArray();
 
 texture2d = new Texture2D(2,2,TextureFormat.RGB24,false);
 texture2d.LoadRawTextureData(recBuffer);
 texture2d.Apply();
 
 _rawImageBytes.texture = texture2d;
 }

Add comment · Show 3

andrew-lukasik · Sep 09, 2020 at 07:30 PM 0

 texture2d = new Texture2D(2,2,TextureFormat.RGB24,false);

This line hard coded expected raw data to be 12 bytes long. While it's not responsible for this exact exception but will be the next one :).

andrew-lukasik · Sep 09, 2020 at 07:53 PM 0

As to ArgumentOutOfRangeException: Specified argument was out of the range of valid values my guess is that array from stream.ReadBytes(array) is of length 0.