Method requestNewUpdate

java/com/tigervnc/rfb/CConnection.java:615–657

()

  // requestNewUpdate() requests an update from the server, having set the
  // format and encoding appropriately.
  private void requestNewUpdate()
  {
    if (formatChange && !pendingPFChange) {
      /* Catch incorrect requestNewUpdate calls */
      assert(!pendingUpdate || continuousUpdates);

      // We have to make sure we switch the internal format at a safe
      // time. For continuous updates we temporarily disable updates and
      // look for a EndOfContinuousUpdates message to see when to switch.
      // For classical updates we just got a new update right before this
      // function was called, so we need to make sure we finish that
      // update before we can switch.

      pendingPFChange = true;
      pendingPF = nextPF;

      if (continuousUpdates)
        writer().writeEnableContinuousUpdates(false, 0, 0, 0, 0);

      writer().writeSetPixelFormat(pendingPF);

      if (continuousUpdates)
        writer().writeEnableContinuousUpdates(true, 0, 0,
                                              server.width(),
                                              server.height());
      formatChange = false;
    }

    if (encodingChange) {
      updateEncodings();
      encodingChange = false;
    }

    if (forceNonincremental || !continuousUpdates) {
      pendingUpdate = true;
      writer().writeFramebufferUpdateRequest(new Rect(0, 0,
                                                      server.width(),
                                                      server.height()),
                                             !forceNonincremental);
    }

    forceNonincremental = false;
  }

  // Ask for encodings based on which decoders are supported.  Assumes higher
  // encoding numbers are more desirable.