[logging] Fetch hardware info, add to video window title and log (#117)

src/SharpEmu.CLI/Program.cs

@@ -95,6 +95,7 @@ internal static partial class Program
         SharpEmuLog.MinimumLevel = logLevel;
 
         Log.Info(BuildInfo.Banner);
+        Log.Info(HostSystemInfo.Summary);
 
         ebootPath = Path.GetFullPath(ebootPath);
         Console.Error.WriteLine($"[DEBUG] Full path: {ebootPath}");

src/SharpEmu.Libs/VideoOut/VideoOutExports.cs

@@ -3,6 +3,7 @@
 
 using SharpEmu.HLE;
 using SharpEmu.Libs.Kernel;
+using SharpEmu.Logging;
 using System.Buffers.Binary;
 using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
@@ -133,9 +134,10 @@ public static class VideoOutExports
         var application = parts.Count == 0 ? "VideoOut" : string.Join(' ', parts);
         var versionSuffix = string.IsNullOrWhiteSpace(version) ? string.Empty : $" v{version.Trim()}";
         var commitSuffix = string.IsNullOrWhiteSpace(emulatorCommitSha) ? string.Empty : $" \u00b7 {emulatorCommitSha.Trim()}";
+        var hardwareSuffix = $" \u00b7 {HostSystemInfo.CpuName} \u00b7 {HostSystemInfo.GpuName}";
         lock (_stateGate)
         {
-            _windowTitle = $"SharpEmu{commitSuffix} - {application}{versionSuffix}";
+            _windowTitle = $"SharpEmu{commitSuffix} - {application}{versionSuffix}{hardwareSuffix}";
         }
     }
 

src/SharpEmu.Logging/HostSystemInfo.cs

@@ -0,0 +1,178 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using Microsoft.Win32;
+using System.Runtime.InteropServices;
+using System.Text.RegularExpressions;
+
+namespace SharpEmu.Logging;
+
+/// <summary>Provides best-effort information about the host system.</summary>
+public static class HostSystemInfo
+{
+    private static readonly Lazy<string> CpuNameValue = new(GetCpuName);
+    private static readonly Lazy<string> GpuNameValue = new(GetPreferredGpuName);
+    private static readonly Lazy<string> MemoryDescriptionValue = new(GetMemoryDescription);
+
+    /// <summary>Host CPU name, or a safe fallback when it cannot be determined.</summary>
+    public static string CpuName => CpuNameValue.Value;
+
+    /// <summary>Preferred physical GPU name, or a safe fallback when it cannot be determined.</summary>
+    public static string GpuName => GpuNameValue.Value;
+
+    /// <summary>Returns a concise description of the host hardware for diagnostic logs.</summary>
+    public static string Summary =>
+        $"Host hardware: CPU: {CpuName}; GPU: {GpuName}; RAM: {MemoryDescriptionValue.Value}.";
+
+    private static string GetCpuName()
+    {
+        if (!OperatingSystem.IsWindows())
+        {
+            return $"{Environment.ProcessorCount} logical processors";
+        }
+
+        try
+        {
+            using var key = Registry.LocalMachine.OpenSubKey(@"HARDWARE\DESCRIPTION\System\CentralProcessor\0");
+            if (key?.GetValue("ProcessorNameString") is string name && !string.IsNullOrWhiteSpace(name))
+            {
+                return Regex.Replace(
+                    name.Trim(),
+                    @"\s+\d+-Core Processor$",
+                    string.Empty,
+                    RegexOptions.IgnoreCase | RegexOptions.CultureInvariant);
+            }
+        }
+        catch (Exception)
+        {
+            // Hardware information is diagnostic only.
+        }
+
+        return $"{Environment.ProcessorCount} logical processors";
+    }
+
+    private static string GetPreferredGpuName()
+    {
+        if (!OperatingSystem.IsWindows())
+        {
+            return "unknown";
+        }
+
+        try
+        {
+            var preferredName = "unknown";
+            var preferredScore = int.MinValue;
+            for (uint index = 0; ; index++)
+            {
+                var device = new DisplayDevice
+                {
+                    cb = Marshal.SizeOf<DisplayDevice>(),
+                };
+
+                if (!EnumDisplayDevices(null, index, ref device, 0))
+                {
+                    break;
+                }
+
+                var name = device.DeviceString?.Trim();
+                var score = ScoreGpu(name);
+                if (score > preferredScore)
+                {
+                    preferredName = name!;
+                    preferredScore = score;
+                }
+            }
+
+            return preferredScore > 0 ? preferredName : "unknown";
+        }
+        catch (Exception)
+        {
+            // Hardware information is diagnostic only.
+            return "unknown";
+        }
+    }
+
+    private static int ScoreGpu(string? name)
+    {
+        if (string.IsNullOrWhiteSpace(name) ||
+            name.Contains("virtual", StringComparison.OrdinalIgnoreCase) ||
+            name.Contains("remote", StringComparison.OrdinalIgnoreCase) ||
+            name.Contains("basic display", StringComparison.OrdinalIgnoreCase))
+        {
+            return -1;
+        }
+
+        if (name.Contains("nvidia", StringComparison.OrdinalIgnoreCase) ||
+            name.Contains("geforce", StringComparison.OrdinalIgnoreCase) ||
+            name.Contains("amd", StringComparison.OrdinalIgnoreCase) ||
+            name.Contains("radeon", StringComparison.OrdinalIgnoreCase))
+        {
+            return 2;
+        }
+
+        return 1;
+    }
+
+    private static string GetMemoryDescription()
+    {
+        if (OperatingSystem.IsWindows())
+        {
+            try
+            {
+                var status = new MemoryStatusEx
+                {
+                    dwLength = (uint)Marshal.SizeOf<MemoryStatusEx>(),
+                };
+                if (GlobalMemoryStatusEx(ref status))
+                {
+                    var megabytes = status.ullTotalPhys / (1024 * 1024);
+                    var gigabytes = status.ullTotalPhys / (1024d * 1024 * 1024);
+                    return $"{megabytes:N0} MB ({gigabytes:N1} GB)";
+                }
+            }
+            catch (Exception)
+            {
+                // Hardware information is diagnostic only.
+            }
+        }
+
+        return "unknown";
+    }
+
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
+    private struct DisplayDevice
+    {
+        public int cb;
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
+        public string? DeviceName;
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]
+        public string? DeviceString;
+        public int StateFlags;
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]
+        public string? DeviceId;
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]
+        public string? DeviceKey;
+    }
+
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
+    private struct MemoryStatusEx
+    {
+        public uint dwLength;
+        public uint dwMemoryLoad;
+        public ulong ullTotalPhys;
+        public ulong ullAvailPhys;
+        public ulong ullTotalPageFile;
+        public ulong ullAvailPageFile;
+        public ulong ullTotalVirtual;
+        public ulong ullAvailVirtual;
+        public ulong ullAvailExtendedVirtual;
+    }
+
+    [DllImport("user32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
+    [return: MarshalAs(UnmanagedType.Bool)]
+    private static extern bool EnumDisplayDevices(string? deviceName, uint deviceNum, ref DisplayDevice displayDevice, uint flags);
+
+    [DllImport("kernel32.dll", SetLastError = true)]
+    [return: MarshalAs(UnmanagedType.Bool)]
+    private static extern bool GlobalMemoryStatusEx(ref MemoryStatusEx buffer);
+}