d3d8: Refuse to reset a lost device.

dlls/d3d8/device.c

@@ -647,6 +647,12 @@ static HRESULT WINAPI d3d8_device_Reset(IDirect3DDevice8 *iface,
 
     TRACE("iface %p, present_parameters %p.\n", iface, present_parameters);
 
+    if (device->device_state == D3D8_DEVICE_STATE_LOST)
+    {
+        WARN("App not active, returning D3DERR_DEVICELOST.\n");
+        return D3DERR_DEVICELOST;
+    }
+
     wined3d_mutex_lock();
 
     if (device->vertex_buffer)

dlls/d3d8/tests/device.c

@@ -6863,6 +6863,17 @@ static void test_lost_device(void)
     hr = IDirect3DDevice8_Present(device, NULL, NULL, NULL, NULL);
     todo_wine ok(hr == D3DERR_DEVICELOST, "Got unexpected hr %#x.\n", hr);
 
+    ret = SetForegroundWindow(GetDesktopWindow());
+    ok(ret, "Failed to set foreground window.\n");
+    hr = reset_device(device, &device_desc);
+    ok(hr == D3DERR_DEVICELOST, "Got unexpected hr %#x.\n", hr);
+    ret = ShowWindow(window, SW_RESTORE);
+    ok(ret, "Failed to restore window.\n");
+    ret = SetForegroundWindow(window);
+    ok(ret, "Failed to set foreground window.\n");
+    hr = reset_device(device, &device_desc);
+    ok(hr == D3D_OK, "Got unexpected hr %#x.\n", hr);
+
     refcount = IDirect3DDevice8_Release(device);
     ok(!refcount, "Device has %u references left.\n", refcount);
 done: