DirectX Error on Workspace Switch – D2DERR_WRONG_RESOURCE_DOMAIN from OnRender, despite SharpDX best practices

Desktop SDK - Indicators
1

Dear NinjaTrader Support,

I’m encountering a persistent DirectX error when switching between workspaces, even when following documented best practices for SharpDX resource management in NinjaScript. This happens even in a minimal indicator that draws a single line using a correctly managed SharpDX brush and implements OnRenderTargetChanged() properly.

:white_check_mark: Steps To Reproduce

  1. Add the attached SimpleDxLineTest indicator to any chart.
  2. Switch to a different workspace (leaving the current chart open but no longer visible).
  3. Observe the NinjaScript Output Log or Control Center > Log tab.

You’ll see the following DirectX error immediately upon switching away:

A direct X error has occurred while rendering the chart: HRESULT: [0x88990015] 
Module: [SharpDX.Direct2D1] 
ApiCode: [D2DERR_WRONG_RESOURCE_DOMAIN/WrongResourceDomain] 
Message: The resource was realized on the wrong render target.

:test_tube: Observations

  • No calls to OnRender() or OnRenderTargetChanged()** are made at the moment of workspace switch (verified via print logs).
  • Error occurs only when switching away from the workspace.
  • When switching back, OnRender() and OnRenderTargetChanged() are called, and rendering resumes without any error.
  • RenderTarget.IsDisposed remains false throughout.

:white_check_mark: Implementation Notes

The indicator:

  • Uses SharpDX properly: brushes are disposed and recreated in OnRenderTargetChanged().
  • Never accesses RenderTarget outside OnRender() or OnRenderTargetChanged().
  • Avoids calling ToDxBrush() at runtime.
  • All rendering is guarded by null checks and IsDisposed checks.

Expected Behavior

If the chart is no longer visible (due to workspace switch), OnRender() should not be invoked — and if it is, SharpDX resources tied to a different render target shouldn’t cause a crash if we’re not actively drawing. Or OnRenderTargetChanged() should be invoked when switching away and back to a workspace so that it can handle the dispose and create of SharpDx resources to prevent the run time error

I’ve attached the SimpleDxLineTest.cs file that demonstrates the issue in isolation.

#region Using declarations

using System;
using System.Windows.Media;
using SharpDX;
using SharpDX.Direct2D1;
using NinjaTrader.Cbi;
using NinjaTrader.Gui.Tools;
using NinjaTrader.NinjaScript;
using NinjaTrader.Data;
using NinjaTrader.Gui.Chart;
using NinjaTrader.NinjaScript.Strategies;
using NinjaTrader.NinjaScript.Indicators;
using Media = System.Windows.Media;

#endregion

namespace NinjaTrader.NinjaScript.Indicators
{
    public class SimpleDxLineTest : Indicator
    {
        private SharpDX.Direct2D1.Brush dxBrush;
        private StrokeStyle strokeStyle;

        protected override void OnStateChange()
        {
            if (State == State.SetDefaults)
            {
                Description = "Draws a DX line at Close[0]";
                Name = "SimpleDxLineTest";
                IsOverlay = true;
                Calculate = Calculate.OnEachTick;
                IsSuspendedWhileInactive = true;
            }
            else if (State == State.Terminated)
            {
                strokeStyle?.Dispose();
                dxBrush?.Dispose();
            }
        }

        public override void OnRenderTargetChanged()
        {
            Print($">>> [OnRenderTargetChanged] called at {DateTime.Now:HH:mm:ss.fff}");

            // Only create strokeStyle once
            if (strokeStyle == null)
            {
                strokeStyle = new StrokeStyle(Core.Globals.D2DFactory,
                    new StrokeStyleProperties { DashStyle = SharpDX.Direct2D1.DashStyle.Solid });
            }

            dxBrush?.Dispose();
            dxBrush = new SharpDX.Direct2D1.SolidColorBrush(RenderTarget, SharpDX.Color.DodgerBlue);
        }

        protected override void OnRender(ChartControl chartControl, ChartScale chartScale)
        {
            Print($">>> [OnRender] called at {DateTime.Now:HH:mm:ss.fff}");

            if (ChartBars == null || chartScale == null || RenderTarget == null)
                return;

            // Draw horizontal line in the middle of chart panel
            float y = ChartPanel.H / 2f;
            RenderTarget.DrawLine(
                new Vector2(0, y),
                new Vector2(ChartPanel.W, y),
                dxBrush,
                2f,
                strokeStyle
            );
        }
    }
}

Please let me know if there is a lifecycle-safe workaround or recommended approach to handle workspace switches cleanly without triggering this error. I’m happy to assist with any additional diagnostics.

2

Why not just define a public Stroke, and use that in your OnRender?

So much simpler than using Brushes and/or handling SharpDX objects.
Plus, Color, Style, and Opacity All end up being user configurable.

public class HTBlank : Indicator
{
	protected override void OnStateChange()
	{
		if (State == State.SetDefaults)
		{
			Description					= @"";
			Name						= "HTBlank";
			Calculate					= Calculate.OnBarClose;
			IsOverlay					= true;
			PaintPriceMarkers			= false;
			ScaleJustification			= NinjaTrader.Gui.Chart.ScaleJustification.Right;
			IsSuspendedWhileInactive	= true;
			
			MyStroke					= new Stroke(System.Windows.Media.Brushes.Red, NinjaTrader.Gui.DashStyleHelper.Dash, 2f, 100);
		}
	}
	
	protected override void OnBarUpdate() { }

	
	public override void OnRenderTargetChanged()
	{
	   if (RenderTarget != null) MyStroke.RenderTarget = RenderTarget;
	}

	
   	protected override void OnRender(ChartControl chartControl, ChartScale chartScale)
    {
		if(IsInHitTest || RenderTarget == null || ChartPanel == null || MyStroke == null) return; 
        base.OnRender(chartControl, chartScale);
		
		float y = (ChartPanel.H - ChartPanel.Y) / 2f;
		RenderTarget.DrawLine(new SharpDX.Vector2(ChartPanel.X, y), new SharpDX.Vector2(ChartPanel.W, y), MyStroke.BrushDX, MyStroke.Width, MyStroke.StrokeStyle);
	}		

	
	[Display(Name="MyStoke", Description=@"MyStoke", Order=0, GroupName="Settings")]
	public Stroke MyStroke { get; set; }

}

Be Safe in this Crazy World!
:smiling_face_with_sunglasses:

1 Like
3

Thank you for reviewing this and writing this coding suggestion. It’s very useful to know this and I will use this for indicators that require simpler SharpDX rendering. My actual indicator is more complicated with the use of multiple strokes, gradient fills, different brushes for up/down candles, filled candles. So for that indicator I may need to manage the SharpDX resources.

However I did compile this code and found that this never caused the run-time error in my System Log when switching workspaces. Puzzled by this, I then found the root cause of my problem. I had another indicator in the workspace which had not implemented OnRenderTargetChanged() and was not disposing and recreating SharpDX resources and it was this indicator giving the run-time errors.

4

This thread can be closed as issue identified due to unrelated indicator using SharpDX but not implementing OnRenderTargetChanged() to dispose and recreate SharpDX resources as per guidelines.

5

Thanks for this gem. I suppose same could be done with text styling?

Edit: I see you did that there: Drawing tool for swing highs and swing lows - #8 by Edge

6

Create SimpleFont public property to be used for TextFormat.
TextFormat can be declared and assigned once, then re-used.
TextLayout not so much. I would recommend using() statement.

While you do not need a TextLayout to just render a DrawText.
Easier to grab the height and length of string from Metrics.

	public class HTBlank : Indicator
	{
		private bool 	isConfigSet	= false;
		private string 	myString 	= "Test String";
		private SharpDX.DirectWrite.TextFormat myTextFormat;
		
		protected override void OnStateChange()
		{
			if (State == State.SetDefaults)
			{
				Description					= @"";
				Name						= "HTBlank";
				Calculate					= Calculate.OnBarClose;
				IsOverlay					= true;
				PaintPriceMarkers			= false;
				ScaleJustification			= NinjaTrader.Gui.Chart.ScaleJustification.Right;
				IsSuspendedWhileInactive	= true;
				
				MyStroke					= new Stroke(System.Windows.Media.Brushes.Red, NinjaTrader.Gui.DashStyleHelper.Dash, 2f, 100);
				MySimpleFont		 		= new NinjaTrader.Gui.Tools.SimpleFont("Arial", 16) { Size = 16, Bold = true };
			}
			else if (State == State.Configure)
			{
				isConfigSet = true;
				myTextFormat = MySimpleFont.ToDirectWriteTextFormat();
				myTextFormat.TextAlignment = SharpDX.DirectWrite.TextAlignment.Leading;
			}
			else if (State == State.Terminated)
			{
				if(!isConfigSet) return;
				
				if(myTextFormat != null)
				{
					myTextFormat.Dispose();
					myTextFormat = null;
				}
			}
		}
		
		protected override void OnBarUpdate() { }
		
		
		public override void OnRenderTargetChanged()
		{
		   if (RenderTarget != null) MyStroke.RenderTarget = RenderTarget;
		}
		
		
	   	protected override void OnRender(ChartControl chartControl, ChartScale chartScale)
        {
			if(IsInHitTest || RenderTarget == null || ChartPanel == null || myTextFormat == null || MyStroke == null) return; 
	        base.OnRender(chartControl, chartScale);
			
			//DrawLine
			float y = (ChartPanel.H - ChartPanel.Y) / 2f;
			RenderTarget.DrawLine(new SharpDX.Vector2(ChartPanel.X, y), new SharpDX.Vector2(ChartPanel.W, y), MyStroke.BrushDX, MyStroke.Width, MyStroke.StrokeStyle);
			
			//DrawText
			float x = (ChartPanel.W - ChartPanel.X) / 2f;
			RenderTarget.DrawText(myString, myTextFormat, new SharpDX.RectangleF(x, y, 250f, 50f ), MyStroke.BrushDX);
			
			//DrawTextLayout
			using(SharpDX.DirectWrite.TextLayout myTextLayout = new SharpDX.DirectWrite.TextLayout(Core.Globals.DirectWriteFactory, myString, myTextFormat, 250f, 50f))
			{
				RenderTarget.DrawTextLayout(new SharpDX.Vector2(x - myTextLayout.Metrics.Width/2, y - myTextLayout.Metrics.Height), myTextLayout, MyStroke.BrushDX);
			}
		}		
		
		
		[Display(Name="MyStoke", Description=@"MyStoke", Order=0, GroupName="Settings")]
		public Stroke MyStroke { get; set; }
	
		[Display(Name="MySimpleFont", Description=@"MySimpleFont", Order=1, GroupName="Settings")]
		public SimpleFont MySimpleFont { get; set; }
		
		
	}

Be Safe in this Crazy World!
:smiling_face_with_sunglasses:

2 Likes
Looking for text box that stays on a chart in same position