wined3d: Validate that we got a valid window in wined3d_device_setup_fullscreen_window().

dlls/dxgi/tests/dxgi.c

@@ -2292,7 +2292,7 @@ static void test_set_fullscreen(void)
     hr = IDXGISwapChain_SetFullscreenState(swapchain, FALSE, NULL);
     ok(hr == S_OK, "Got unexpected hr %#x.\n", hr);
     hr = IDXGISwapChain_SetFullscreenState(swapchain, TRUE, NULL);
-    todo_wine ok(hr == DXGI_ERROR_NOT_CURRENTLY_AVAILABLE, "Got unexpected hr %#x.\n", hr);
+    ok(hr == DXGI_ERROR_NOT_CURRENTLY_AVAILABLE, "Got unexpected hr %#x.\n", hr);
     hr = IDXGISwapChain_SetFullscreenState(swapchain, FALSE, NULL);
     ok(hr == S_OK, "Got unexpected hr %#x.\n", hr);
     refcount = IDXGISwapChain_Release(swapchain);
@@ -2310,7 +2310,7 @@ static void test_set_fullscreen(void)
     hr = IDXGISwapChain_SetFullscreenState(swapchain, FALSE, NULL);
     ok(hr == S_OK, "Got unexpected hr %#x.\n", hr);
     hr = IDXGISwapChain_SetFullscreenState(swapchain, TRUE, NULL);
-    todo_wine ok(hr == DXGI_ERROR_NOT_CURRENTLY_AVAILABLE, "Got unexpected hr %#x.\n", hr);
+    ok(hr == DXGI_ERROR_NOT_CURRENTLY_AVAILABLE, "Got unexpected hr %#x.\n", hr);
     hr = IDXGISwapChain_SetFullscreenState(swapchain, FALSE, NULL);
     ok(hr == S_OK, "Got unexpected hr %#x.\n", hr);
     refcount = IDXGISwapChain_Release(swapchain);

dlls/wined3d/device.c

@@ -927,13 +927,20 @@ static LONG fullscreen_exstyle(LONG exstyle)
     return exstyle;
 }
 
-void CDECL wined3d_device_setup_fullscreen_window(struct wined3d_device *device, HWND window, UINT w, UINT h)
+HRESULT CDECL wined3d_device_setup_fullscreen_window(struct wined3d_device *device,
+        HWND window, unsigned int w, unsigned int h)
 {
     BOOL filter_messages;
     LONG style, exstyle;
 
     TRACE("Setting up window %p for fullscreen mode.\n", window);
 
+    if (!IsWindow(window))
+    {
+        WARN("%p is not a valid window.\n", window);
+        return WINED3DERR_NOTAVAILABLE;
+    }
+
     if (device->style || device->exStyle)
     {
         ERR("Changing the window style for window %p, but another style (%08x, %08x) is already stored.\n",
@@ -957,6 +964,8 @@ void CDECL wined3d_device_setup_fullscreen_window(struct wined3d_device *device,
     SetWindowPos(window, HWND_TOPMOST, 0, 0, w, h, SWP_FRAMECHANGED | SWP_SHOWWINDOW | SWP_NOACTIVATE);
 
     device->filter_messages = filter_messages;
+
+    return WINED3D_OK;
 }
 
 void CDECL wined3d_device_restore_fullscreen_window(struct wined3d_device *device, HWND window,

dlls/wined3d/swapchain.c

@@ -1478,7 +1478,9 @@ HRESULT CDECL wined3d_swapchain_set_fullscreen(struct wined3d_swapchain *swapcha
         if (swapchain->desc.windowed)
         {
             /* Switch from windowed to fullscreen */
-            wined3d_device_setup_fullscreen_window(device, swapchain->device_window, width, height);
+            if (FAILED(hr = wined3d_device_setup_fullscreen_window(device,
+                    swapchain->device_window, width, height)))
+                return hr;
         }
         else
         {

include/wine/wined3d.h

@@ -2483,7 +2483,8 @@ HRESULT __cdecl wined3d_device_set_vs_consts_i(struct wined3d_device *device,
 void __cdecl wined3d_device_set_vs_resource_view(struct wined3d_device *device,
         UINT idx, struct wined3d_shader_resource_view *view);
 void __cdecl wined3d_device_set_vs_sampler(struct wined3d_device *device, UINT idx, struct wined3d_sampler *sampler);
-void __cdecl wined3d_device_setup_fullscreen_window(struct wined3d_device *device, HWND window, UINT w, UINT h);
+HRESULT __cdecl wined3d_device_setup_fullscreen_window(struct wined3d_device *device,
+        HWND window, unsigned int w, unsigned int h);
 BOOL __cdecl wined3d_device_show_cursor(struct wined3d_device *device, BOOL show);
 void __cdecl wined3d_device_update_sub_resource(struct wined3d_device *device, struct wined3d_resource *resource,
         unsigned int sub_resource_idx, const struct wined3d_box *box, const void *data, unsigned int row_pitch,