void DiscardDeviceResources()
{
if (_d2dContext != null)
{
DXUtil.Dispose(ref _blur);
DXUtil.Dispose(ref _warp);
DXUtil.Dispose(ref _imBmp);
DXUtil.Dispose(ref _targetBmp);
_d2dDevice.Dispose();
_lineBrush.Dispose();
_d2dContext.Dispose();
_d2dContext = null;
}
}
//----------------------------------------------------------------------
#region ** device resources
void CreateDeviceResources()
{
D3D.FeatureLevel actualLevel;
D3D.DeviceContext d3dContext = null;
var d3dDevice = new D3D.Device(IntPtr.Zero);
var result = HResult.Ok;
for (int i = 0; i <= 1; i++)
{
// use WARP if hardware is not available
var dt = i == 0 ? D3D.DriverType.Hardware : D3D.DriverType.Warp;
result = D3D.D3D11.CreateDevice(null, dt, IntPtr.Zero, D3D.DeviceCreationFlags.BgraSupport | D3D.DeviceCreationFlags.SingleThreaded,
null, 0, D3D.D3D11.SdkVersion, d3dDevice, out actualLevel, out d3dContext);
if (result.Code != unchecked ((int)0x887A0004)) // DXGI_ERROR_UNSUPPORTED
{
break;
}
}
result.CheckError();
d3dContext.Dispose();
var dxgiDevice = d3dDevice.QueryInterface <DXGI.Device>();
d3dDevice.Dispose();
_d2dDevice = D2D.Device.Create(_d2dFactory, dxgiDevice);
dxgiDevice.Dispose();
_d2dContext = D2D.DeviceContext.Create(_d2dDevice, D2D.DeviceContextOptions.None);
_d2dContext.SetUnitMode(D2D.UnitMode.Pixels);
_lineBrush = D2D.SolidColorBrush.Create(_d2dContext, ColorF.Blue);
var sourceEffect = D2D.Effect.RegisterAndCreateCustom <WarpEffect>(_d2dFactory, _d2dContext);
_warp = (WarpEffect)sourceEffect.CustomEffect;
_warp.Effect = sourceEffect;
_blur = D2D.Effects.GaussianBlur.Create(_d2dContext);
_blur.StandardDeviation = 2f;
}