Initial commit: OpenRA game engine

Fork from OpenRA/OpenRA with one-click launch script (start-ra.cmd)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

OpenRA.Mods.Common/Widgets/Logic/PerfDebugLogic.cs

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+#region Copyright & License Information
+/*
+ * Copyright (c) The OpenRA Developers and Contributors
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using OpenRA.Graphics;
+using OpenRA.Support;
+using OpenRA.Widgets;
+
+namespace OpenRA.Mods.Common.Widgets.Logic
+{
+	public class PerfDebugLogic : ChromeLogic
+	{
+		readonly Stopwatch fpsTimer;
+		readonly List<(int Frame, TimeSpan Time)> frameTimings = new(32);
+
+		[ObjectCreator.UseCtor]
+		public PerfDebugLogic(Widget widget, WorldRenderer worldRenderer)
+		{
+			var perfGraph = widget.Get("GRAPH_BG");
+			perfGraph.IsVisible = () => Game.Settings.Debug.PerfGraph;
+
+			var perfText = widget.Get<LabelWidget>("PERF_TEXT");
+			perfText.IsVisible = () => Game.Settings.Debug.PerfText;
+
+			fpsTimer = Stopwatch.StartNew();
+			frameTimings.Add((Game.RenderFrame, TimeSpan.Zero));
+			perfText.GetText = () =>
+			{
+				// Calculate FPS as a rolling average over the last ~1 second of frames.
+				frameTimings.Add((Game.RenderFrame, fpsTimer.Elapsed));
+				var cutoffTime = frameTimings[^1].Time - TimeSpan.FromSeconds(1);
+				var firstIndexPastCutoff = frameTimings.FindIndex(ft => ft.Time >= cutoffTime);
+				if (frameTimings.Count - firstIndexPastCutoff >= 2) // Keep at least 2 items for comparing.
+					frameTimings.RemoveRange(0, firstIndexPastCutoff);
+				var (oldestFrame, oldestTime) = frameTimings[0];
+				var (newestFrame, newestTime) = frameTimings[^1];
+				var fps = (newestFrame - oldestFrame) / (newestTime - oldestTime).TotalSeconds;
+
+				var wfbSize = Game.Renderer.WorldFrameBufferSize;
+				var viewportSize = worldRenderer.Viewport.ViewportSize;
+				return $"FPS: {fps:0}\nTick {Game.LocalTick} @ {PerfHistory.Items["tick_time"].Average(Game.Settings.Debug.Samples):F1} ms\n" +
+					$"Render {Game.RenderFrame} @ {PerfHistory.Items["render"].Average(Game.Settings.Debug.Samples):F1} ms\n" +
+					$"Batches: {PerfHistory.Items["batches"].LastValue}\n" +
+					$"Viewport Size: {viewportSize.Width} x {viewportSize.Height} / {Game.Renderer.WorldDownscaleFactor}\n" +
+					$"WFB Size: {wfbSize.Width} x {wfbSize.Height}";
+			};
+
+			Game.AfterGameStart += OnGameStart;
+		}
+
+		void OnGameStart()
+		{
+			// Reset timings so our average doesn't include loading time.
+			frameTimings.Clear();
+			frameTimings.Add((Game.RenderFrame, fpsTimer.Elapsed));
+		}
+
+		bool disposed;
+		protected override void Dispose(bool disposing)
+		{
+			if (disposing && !disposed)
+			{
+				disposed = true;
+				Game.AfterGameStart -= OnGameStart;
+			}
+
+			base.Dispose(disposing);
+		}
+	}
+}