功能：完善2K串流、显示恢复与输入优化

tools/probe-nvidia-d3d.cs

@@ -0,0 +1,67 @@
+using System;
+using System.Collections.Generic;
+using System.Runtime.InteropServices;
+
+namespace VdiDiagnostics {
+    public class AdapterResult {
+        public string Name;
+        public uint VendorId;
+        public int DeviceResult;
+    }
+
+    // Enumerate the actual DXGI adapters and create a D3D11 device on each NVIDIA
+    // adapter. A WMI/PnP model name alone does not prove that D3D is operational.
+    public static class D3DProbe {
+        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
+        private struct AdapterDesc {
+            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)] public string Description;
+            public uint VendorId, DeviceId, SubSysId, Revision;
+            public UIntPtr DedicatedVideoMemory, DedicatedSystemMemory, SharedSystemMemory;
+            public long AdapterLuid;
+        }
+        [UnmanagedFunctionPointer(CallingConvention.StdCall)]
+        private delegate int EnumAdapters(IntPtr factory, uint index, out IntPtr adapter);
+        [UnmanagedFunctionPointer(CallingConvention.StdCall)]
+        private delegate int GetDesc(IntPtr adapter, out AdapterDesc desc);
+        [DllImport("dxgi.dll")]
+        private static extern int CreateDXGIFactory1(ref Guid iid, out IntPtr factory);
+        [DllImport("d3d11.dll")]
+        private static extern int D3D11CreateDevice(IntPtr adapter, uint driverType,
+            IntPtr software, uint flags, IntPtr levels, uint levelCount, uint sdkVersion,
+            out IntPtr device, out uint featureLevel, out IntPtr context);
+
+        public static AdapterResult[] Check() {
+            var results = new List<AdapterResult>();
+            var iid = new Guid("770aae78-f26f-4dba-a829-253c83d1b387");
+            IntPtr factory;
+            Marshal.ThrowExceptionForHR(CreateDXGIFactory1(ref iid, out factory));
+            try {
+                var table = Marshal.ReadIntPtr(factory);
+                var enumerate = (EnumAdapters)Marshal.GetDelegateForFunctionPointer(
+                    Marshal.ReadIntPtr(table, 7 * IntPtr.Size), typeof(EnumAdapters));
+                for (uint i = 0; i < 32; i++) {
+                    IntPtr adapter;
+                    int hr = enumerate(factory, i, out adapter);
+                    if (hr == unchecked((int)0x887A0002)) break;
+                    Marshal.ThrowExceptionForHR(hr);
+                    try {
+                        var descMethod = (GetDesc)Marshal.GetDelegateForFunctionPointer(
+                            Marshal.ReadIntPtr(Marshal.ReadIntPtr(adapter), 8 * IntPtr.Size), typeof(GetDesc));
+                        AdapterDesc desc;
+                        Marshal.ThrowExceptionForHR(descMethod(adapter, out desc));
+                        if (desc.VendorId != 0x10de) continue;
+                        IntPtr device, context;
+                        uint level;
+                        hr = D3D11CreateDevice(adapter, 0, IntPtr.Zero, 0, IntPtr.Zero,
+                            0, 7, out device, out level, out context);
+                        if (context != IntPtr.Zero) Marshal.Release(context);
+                        if (device != IntPtr.Zero) Marshal.Release(device);
+                        results.Add(new AdapterResult { Name = desc.Description,
+                            VendorId = desc.VendorId, DeviceResult = hr });
+                    } finally { Marshal.Release(adapter); }
+                }
+            } finally { Marshal.Release(factory); }
+            return results.ToArray();
+        }
+    }
+}