Throw a PlatformNotSupportedException if WGL_NV_DX_interop is not pre…

…sent.
opentk · Aug 8, 2024 · 67129a3 · 67129a3
1 parent 5649081
commit 67129a3
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Showing 2 changed files with 59 additions and 31 deletions.
diff --git a/src/GLWpfControl/DXGLContext.cs b/src/GLWpfControl/DXGLContext.cs
@@ -39,37 +39,6 @@ internal sealed class DxGlContext : IDisposable
 
         public DxGlContext(GLWpfControlSettings settings)
         {
-            DXInterop.Direct3DCreate9Ex(DXInterop.DefaultSdkVersion, out DXInterop.IDirect3D9Ex dxContext);
-            DxContext = dxContext;
-
-            PresentationParameters deviceParameters = new PresentationParameters
-            {
-                Windowed = 1,
-                SwapEffect = SwapEffect.Discard,
-                DeviceWindowHandle = IntPtr.Zero,
-                PresentationInterval = 0,
-                BackBufferFormat = Format.X8R8G8B8,
-                BackBufferWidth = 1,
-                BackBufferHeight = 1,
-                AutoDepthStencilFormat = Format.Unknown,
-                BackBufferCount = 1,
-                EnableAutoDepthStencil = 0,
-                Flags = 0,
-                FullScreen_RefreshRateInHz = 0,
-                MultiSampleQuality = 0,
-                MultiSampleType = MultisampleType.D3DMULTISAMPLE_NONE,
-            };
-
-            dxContext.CreateDeviceEx(
-                0,
-                DeviceType.HAL,
-                IntPtr.Zero,
-                CreateFlags.HardwareVertexProcessing | CreateFlags.Multithreaded | CreateFlags.PureDevice | CreateFlags.FpuPreserve,
-                ref deviceParameters,
-                IntPtr.Zero,
-                out DXInterop.IDirect3DDevice9Ex dxDevice);
-            DxDevice = dxDevice;
-
             // if the graphics context is null, we use the shared context.
             if (settings.ContextToUse != null)
             {
@@ -96,13 +65,66 @@ public DxGlContext(GLWpfControlSettings settings)
                 IBindingsContext provider = settings.BindingsContext ?? new GLFWBindingsContext();
                 Wgl.LoadBindings(provider);
 
+                bool hasNVDXInterop = false;
+                unsafe
+                {
+                    IntPtr hwnd = GLFW.GetWin32Window(GlfwWindow.WindowPtr);
+                    IntPtr hdc = DXInterop.GetDC(hwnd);
+                    string exts = Wgl.Arb.GetExtensionsString(hdc);
+                    DXInterop.ReleaseDC(hwnd, hdc);
+
+                    foreach (string ext in exts.Split(' '))
+                    {
+                        if (ext == "WGL_NV_DX_interop" || ext == "NV_DX_interop")
+                        {
+                            hasNVDXInterop = true;
+                            break;
+                        }
+                    }
+                }
+
+                if (hasNVDXInterop == false)
+                {
+                    throw new PlatformNotSupportedException("NV_DX_interop extension is not suppored. This extensions is currently needed for GLWpfControl to work.");
+                }
+
 #if DEBUG
                 GL.DebugMessageCallback(DebugProcCallback, IntPtr.Zero);
                 GL.Enable(EnableCap.DebugOutput);
                 GL.Enable(EnableCap.DebugOutputSynchronous);
 #endif
             }
 
+            DXInterop.Direct3DCreate9Ex(DXInterop.DefaultSdkVersion, out DXInterop.IDirect3D9Ex dxContext);
+            DxContext = dxContext;
+
+            PresentationParameters deviceParameters = new PresentationParameters
+            {
+                Windowed = 1,
+                SwapEffect = SwapEffect.Discard,
+                DeviceWindowHandle = IntPtr.Zero,
+                PresentationInterval = 0,
+                BackBufferFormat = Format.X8R8G8B8,
+                BackBufferWidth = 1,
+                BackBufferHeight = 1,
+                AutoDepthStencilFormat = Format.Unknown,
+                BackBufferCount = 1,
+                EnableAutoDepthStencil = 0,
+                Flags = 0,
+                FullScreen_RefreshRateInHz = 0,
+                MultiSampleQuality = 0,
+                MultiSampleType = MultisampleType.D3DMULTISAMPLE_NONE,
+            };
+
+            dxContext.CreateDeviceEx(
+                0,
+                DeviceType.HAL,
+                IntPtr.Zero,
+                CreateFlags.HardwareVertexProcessing | CreateFlags.Multithreaded | CreateFlags.PureDevice | CreateFlags.FpuPreserve,
+                ref deviceParameters,
+                IntPtr.Zero,
+                out DXInterop.IDirect3DDevice9Ex dxDevice);
+            DxDevice = dxDevice;
 
             GLDeviceHandle = Wgl.DXOpenDeviceNV(dxDevice.Handle);
             if (GLDeviceHandle == IntPtr.Zero)

diff --git a/src/GLWpfControl/Interop/DXInterop.cs b/src/GLWpfControl/Interop/DXInterop.cs
@@ -13,6 +13,12 @@ internal static class DXInterop
         [DllImport("Kernel32.dll")]
         public static extern int GetLastError();
 
+        [DllImport("User32.dll")]
+        public static extern IntPtr /* HDC */ GetDC(IntPtr /* HWND */ hWnd);
+
+        [DllImport("User32.dll")]
+        public static extern int ReleaseDC(IntPtr /* HWND */ hWnd, IntPtr /* HDC */ hDC);
+
         public static void Direct3DCreate9Ex(uint SdkVersion, out IDirect3D9Ex context)
         {
             int result = Direct3DCreate9Ex(SdkVersion, out context);