MoonWorksMultiWindowTest/src/MoonWorksMultiWindowGame.cs

using MoonWorks.Graphics;
using MoonWorks;
using MoonWorksMultiWindow.Graphics;
using System.Threading.Tasks;

namespace MoonWorksMultiWindow
{
	class MoonWorksMultiWindowGame : Game
	{
		private GraphicsObjects GraphicsObjects { get; }

		private Window ExtraWindow { get; }

		public MoonWorksMultiWindowGame(
			WindowCreateInfo windowCreateInfo,
			PresentMode presentMode,
			bool debugMode
		) : base(windowCreateInfo, presentMode, 60, debugMode)
		{
			// Insert your game initialization logic here.
			GraphicsObjects = new GraphicsObjects(
				GraphicsDevice,
				windowCreateInfo.WindowWidth,
				windowCreateInfo.WindowHeight
			);

			var extraWindowCreateInfo = new WindowCreateInfo
			{
				WindowTitle = "Extra Window",
				WindowWidth = 1280,
				WindowHeight = 720,
				ScreenMode = ScreenMode.Windowed
			};

			ExtraWindow = new Window(extraWindowCreateInfo);
		}

		protected override void Update(System.TimeSpan dt)
		{
			// Insert your game update logic here.
		}

		protected override void Draw(System.TimeSpan dt, double alpha)
		{
			var mainDraw = Task.Run(MainDraw);
			var extraDraw = Task.Run(ExtraWindowDraw);

			mainDraw.Wait();
			extraDraw.Wait();
		}

		private void MainDraw()
		{
			var commandBuffer = GraphicsDevice.AcquireCommandBuffer();

			commandBuffer.BeginRenderPass(
				new ColorAttachmentInfo
				{
					RenderTarget = GraphicsObjects.RenderTargets.ExampleRenderTarget,
					ClearColor = Color.CornflowerBlue,
					LoadOp = LoadOp.Clear,
					StoreOp = StoreOp.DontCare
				}
			);

			commandBuffer.EndRenderPass();

			commandBuffer.QueuePresent(
				GraphicsObjects.RenderTargets.ExampleRenderTarget.TextureSlice,
				Filter.Nearest,
				Window
			);

			GraphicsDevice.Submit(commandBuffer);
		}

		private void ExtraWindowDraw()
		{
			var commandBuffer = GraphicsDevice.AcquireCommandBuffer();

			commandBuffer.BeginRenderPass(
				new ColorAttachmentInfo
				{
					RenderTarget = GraphicsObjects.RenderTargets.ExtraWindowRenderTarget,
					ClearColor = Color.OrangeRed,
					LoadOp = LoadOp.Clear,
					StoreOp = StoreOp.DontCare
				}
			);

			commandBuffer.EndRenderPass();

			commandBuffer.QueuePresent(
				GraphicsObjects.RenderTargets.ExtraWindowRenderTarget.TextureSlice,
				Filter.Nearest,
				ExtraWindow
			);

			GraphicsDevice.Submit(commandBuffer);
		}

		protected override void OnDestroy()
		{

		}
	}
}