private void ReleaseDevice()
{
if (_device != null)
{
if (!_device.Disposed)
{
_device.Dispose();
_device = null;
OnDeviceDestroyed(EventArgs.Empty);
}
}
if (_deviceEx != null)
{
if (!_deviceEx.Disposed)
{
_deviceEx.Dispose();
_deviceEx = null;
OnDeviceDestroyed(EventArgs.Empty);
}
}
D3Dimage.Lock();
D3Dimage.SetBackBuffer(D3DResourceType.IDirect3DSurface9, IntPtr.Zero);
D3Dimage.Unlock();
ReleaseBackBuffer();
}
private void ReleaseBackBuffer()
{
if (_backBufferSurface != null && !_backBufferSurface.Disposed)
{
_backBufferSurface.Dispose();
_backBufferSurface = null;
D3Dimage.Lock();
D3Dimage.SetBackBuffer(D3DResourceType.IDirect3DSurface9, IntPtr.Zero);
D3Dimage.Unlock();
}
}
private void OnRendering(object sender, EventArgs e)
{
Debug.Assert(D3Dimage.IsFrontBufferAvailable);
if (DirectXStatus != DirectXStatus.Available)
{
return;
}
bool needToReset = false;
try
{
if (Direct3D == null)
{
InitializeDirect3D();
}
if (Device == null)
{
InitializeDevice();
ForceRendering();
}
if (Device == null)
{
// device might still be not available, so we'll just have to try again next time around
return;
}
if (_sizeChanged)
{
_presentParameters.BackBufferWidth = (int)ActualWidth;
_presentParameters.BackBufferHeight = (int)ActualHeight;
ReleaseBackBuffer();
OnDeviceLost(EventArgs.Empty);
Device.Reset(_presentParameters);
OnDeviceReset(EventArgs.Empty);
_sizeChanged = false;
ForceRendering();
}
bool needsRendering = ResetForceRendering();
if (needsRendering)
{
D3Dimage.Lock();
if (D3Dimage.IsFrontBufferAvailable)
{
Result result = Device.TestCooperativeLevel();
if (result.IsFailure)
{
// we'll change the status in the needToReset block below
DirectXStatus = DirectXStatus.Unavailable_Unknown;
throw new Direct3D9Exception("Device.TestCooperativeLevel() failed");
}
Device.Clear(ClearFlags.Target | ClearFlags.ZBuffer, new Color4(System.Drawing.Color.CornflowerBlue), 1, 0);
Device.BeginScene();
try
{
// call the user's method
OnMainLoop(EventArgs.Empty);
}
catch (Direct3D9Exception d3Dex)
{
if (d3Dex.Message.StartsWith("D3DERR_OUTOFVIDEOMEMORY"))
{
needToReset = true;
}
else
{
throw;
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Caught Exception in SlimDXControl.OnRendering() [d] " + ex);
}
Device.EndScene();
Device.Present();
}
_backBufferSurface = Device.GetBackBuffer(0, 0);
D3Dimage.SetBackBuffer(D3DResourceType.IDirect3DSurface9, _backBufferSurface.ComPointer);
D3Dimage.AddDirtyRect(new Int32Rect(0, 0, D3Dimage.PixelWidth, D3Dimage.PixelHeight));
D3Dimage.Unlock();
}
}
catch (Direct3D9Exception)
{
needToReset = true;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Caught Exception in SlimDXControl.OnRendering() [a] " + ex);
}
if (needToReset)
{
try
{
InitializeDirect3D();
InitializeDevice();
if (DirectXStatus != DirectXStatus.Available)
{
// we were once available (because we were able to enter the OnRender function), but now we're not available
// This could be due to a return from Ctrl-Alt-Del under XP and things just aren't ready yet.
// Keep everything nulled out and we'll just try the next time around.
ReleaseDevice();
ReleaseDirect3D();
DirectXStatus = DirectXStatus.Available;
}
else
{
// we're available now, that's good
// force a rendering next time around
ForceRendering();
}
}
catch (Direct3D9Exception ex)
{
MessageBox.Show(ex.Message, "Caught Exception in SlimDXControl.OnRendering() [b] " + ex);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Caught Exception in SlimDXControl.OnRendering() [c] " + ex);
}
}
}
/// <summary>
/// Initializes the Device and starts up the d3dimage object
/// </summary>
private void InitializeDevice()
{
if (DirectXStatus != DirectXStatus.Available)
{
return;
}
Debug.Assert(Direct3D != null);
ReleaseDevice();
HwndSource hwnd = new HwndSource(0, 0, 0, 0, 0, D3Dimage.PixelWidth, D3Dimage.PixelHeight, "SlimDXControl", IntPtr.Zero);
_presentParameters = new PresentParameters
{
SwapEffect = SwapEffect.Copy,
DeviceWindowHandle = hwnd.Handle,
Windowed = true,
BackBufferWidth = ((int)ActualWidth <= 0) ? 1 : (int)ActualWidth,
BackBufferHeight = ((int)ActualHeight <= 0) ? 1 : (int)ActualHeight,
BackBufferFormat = _backbufferFormat,
AutoDepthStencilFormat = _depthStencilFormat
};
try
{
if (UseDeviceEx)
{
_deviceEx = new DeviceEx((Direct3DEx)Direct3D, 0,
DeviceType.Hardware,
hwnd.Handle,
_createFlags,
_presentParameters);
}
else
{
_device = new Device(Direct3D, 0,
DeviceType.Hardware,
hwnd.Handle,
_createFlags,
_presentParameters);
}
}
catch (Direct3D9Exception)
{
DirectXStatus = DirectXStatus.Unavailable_Unknown;
return;
}
// call the user's ones
OnDeviceCreated(EventArgs.Empty);
OnDeviceReset(EventArgs.Empty);
{
// is it the case that someone else is nulling these out on us? seems so
// this means we need to be careful not to let multiple copies of the delegate get onto the list
// not sure what else we can do here...
CompositionTarget.Rendering -= OnRendering;
D3Dimage.IsFrontBufferAvailableChanged -= OnIsFrontBufferAvailableChanged;
CompositionTarget.Rendering += OnRendering;
D3Dimage.IsFrontBufferAvailableChanged += OnIsFrontBufferAvailableChanged;
}
D3Dimage.Lock();
_backBufferSurface = Device.GetBackBuffer(0, 0);
D3Dimage.SetBackBuffer(D3DResourceType.IDirect3DSurface9, _backBufferSurface.ComPointer);
D3Dimage.Unlock();
}