/// <summary>
/// Configures the Direct3D device, and stores handles to it and the device context.
/// </summary>
private void CreateDeviceResources()
{
DisposeDeviceAndContext();
// This flag adds support for surfaces with a different color channel ordering
// than the API default. It is required for compatibility with Direct2D.
DeviceCreationFlags creationFlags = DeviceCreationFlags.BgraSupport;
#if DEBUG
if (DirectXHelper.SdkLayersAvailable())
{
// If the project is in a debug build, enable debugging via SDK Layers with this flag.
creationFlags |= DeviceCreationFlags.Debug;
}
#endif
// This array defines the set of DirectX hardware feature levels this app will support.
// Note the ordering should be preserved.
// Note that HoloLens supports feature level 11.1. The HoloLens emulator is also capable
// of running on graphics cards starting with feature level 10.0.
FeatureLevel[] featureLevels =
{
FeatureLevel.Level_12_1,
FeatureLevel.Level_12_0,
FeatureLevel.Level_11_1,
FeatureLevel.Level_11_0,
FeatureLevel.Level_10_1,
FeatureLevel.Level_10_0
};
// Create the Direct3D 11 API device object and a corresponding context.
try
{
if (null != dxgiAdapter)
{
using (var device = new Device(dxgiAdapter, creationFlags, featureLevels))
{
// Store pointers to the Direct3D 11.1 API device.
d3dDevice = this.ToDispose(device.QueryInterface <Device3>());
}
}
else
{
using (var device = new Device(DriverType.Hardware, creationFlags, featureLevels))
{
// Store a pointer to the Direct3D device.
d3dDevice = this.ToDispose(device.QueryInterface <Device3>());
}
}
}
catch
{
// If the initialization fails, fall back to the WARP device.
// For more information on WARP, see:
// http://go.microsoft.com/fwlink/?LinkId=286690
using (var device = new Device(DriverType.Warp, creationFlags, featureLevels))
{
d3dDevice = this.ToDispose(device.QueryInterface <Device3>());
}
}
// Cache the feature level of the device that was created.
d3dFeatureLevel = d3dDevice.FeatureLevel;
// Store a pointer to the Direct3D immediate context.
d3dContext = this.ToDispose(d3dDevice.ImmediateContext3);
// Acquire the DXGI interface for the Direct3D device.
using (var dxgiDevice = d3dDevice.QueryInterface <SharpDX.DXGI.Device3>())
{
// Wrap the native device using a WinRT interop object.
IntPtr pUnknown;
UInt32 hr = InteropStatics.CreateDirect3D11DeviceFromDXGIDevice(dxgiDevice.NativePointer, out pUnknown);
if (hr == 0)
{
d3dInteropDevice = (IDirect3DDevice)Marshal.GetObjectForIUnknown(pUnknown);
Marshal.Release(pUnknown);
}
// Store a pointer to the DXGI adapter.
// This is for the case of no preferred DXGI adapter, or fallback to WARP.
dxgiAdapter = this.ToDispose(dxgiDevice.Adapter.QueryInterface <SharpDX.DXGI.Adapter3>());
}
// Check for device support for the optional feature that allows setting the render target array index from the vertex shader stage.
var options = d3dDevice.CheckD3D113Features3();
if (options.VPAndRTArrayIndexFromAnyShaderFeedingRasterizer)
{
d3dDeviceSupportsVprt = true;
}
}