// Reads a scene frame from the GPU backbuffer and sends it via ZMQ.
void sendFrameOnWire()
{
// Read pixels from screen backbuffer (expensive).
rendered_frame.ReadPixels(new Rect(0, 0, state.screenWidth, state.screenHeight), 0, 0);
rendered_frame.Apply(); // Might not actually be needed since only applies setpixel changes.
byte[] raw = rendered_frame.GetRawTextureData();
// Compress and send the image in a different thread.
Task.Run(() =>
{
// Get metadata
RenderMetadata_t metadata = new RenderMetadata_t(state);
// Create packet metadata
var msg = new NetMQMessage();
msg.Append(JsonConvert.SerializeObject(metadata));
// Process each camera's image, compress the image, and serialize the result.
// Compression is disabled for now...
// Stride is also disabled for now. Outputs RGB blocks with stride 3.
List <byte[]> images = state.cameras.AsParallel().Select(cam => get_raw_image(cam, raw, metadata.cameraIDs.Count())).ToList();
// Append images to message
images.ForEach(image => msg.Append(image));
// Send the message.
lock (socket_lock)
{
push_socket.TrySendMultipartMessage(msg);
}
});
}
