65,535 unique BackBrush instance clarification needed

[Zapzap]

The guide writes: You may have up to 65,535 unique BackBrush instances.
But it doesn't clarify the domain.

1. Per indicator instance?
2. Per chart (basically per UI thread)
3. Globally within NinjaTrader8?

Since it affects all Brushes the question is even more so:
How exactly does this limitation work?

[NinjaTrader_Jim]

Hello Zapzap,

Thanks for your question.

This is applicable per NinjaScript instance. If we have a script that creates too many WPF brushes, and then add another indicator which creates custom brushes within the limit, the added indicator which is within the limit can still use its custom brushes and we can see them on the chart.

I had tested with an indicator that is know to bust the limit and then I have added another simple test indicator that adds the following in State.Realtime. "myBrush" is a private Windows.Media.Brush.

else if (State == State.Realtime)
{
myBrush = new SolidColorBrush(Color.FromArgb((byte)255, (byte)255, (byte)255, (byte) 255));
myBrush.Freeze();
BackBrush = myBrush;
}

The script I tested which busts the brush limit can be found here - https://ninjatrader.com/support/foru...ate-oneachtick

We look forward to assisting.

[Zapzap]

Thank you Jim, I reached basically the same conclusion:

You can create as many Brush instances as you want, but a given NinjaScript instance can only plot/show/draw/use 256*256 different Brush objects as BackBrush/BarBrush/Cande Brushes/BrushSeries.

Interesting limitation (I wonder why not 256*256*256), but oh well I accept you somehow need to limit the endlessly created Brushes.