/// <summary>
/// Tries to check or create a default <see cref="ID3D12Device"/> object.
/// </summary>
/// <param name="d3D12Device">A pointer to the <see cref="ID3D12Device"/> object to create, or <see langword="null"/>.</param>
/// <param name="dxgiAdapter">A pointer to the <see cref="IDXGIAdapter"/> object used to create <paramref name="d3D12Device"/>, or <see langword="null"/>.</param>
/// <param name="dxgiDescription1">A pointer to the <see cref="DXGI_ADAPTER_DESC1"/> value for the device found.</param>
/// <returns>Whether a default device was found with the requested feature level.</returns>
private static unsafe bool TryGetDefaultDevice(ID3D12Device **d3D12Device, IDXGIAdapter **dxgiAdapter, DXGI_ADAPTER_DESC1 *dxgiDescription1)
{
using ComPtr <IDXGIFactory4> dxgiFactory4 = default;
EnableDebugMode();
FX.CreateDXGIFactory2(IDXGIFactoryCreationFlags, FX.__uuidof <IDXGIFactory4>(), dxgiFactory4.GetVoidAddressOf()).Assert();
uint i = 0;
while (true)
{
using ComPtr <IDXGIAdapter1> dxgiAdapter1 = default;
HRESULT enumAdapters1Result = dxgiFactory4.Get()->EnumAdapters1(i++, dxgiAdapter1.GetAddressOf());
if (enumAdapters1Result == FX.DXGI_ERROR_NOT_FOUND)
{
return(false);
}
enumAdapters1Result.Assert();
dxgiAdapter1.Get()->GetDesc1(dxgiDescription1).Assert();
if (dxgiDescription1->VendorId == MicrosoftVendorId &&
dxgiDescription1->DeviceId == WarpDeviceId)
{
continue;
}
// Explicit paths for when a device is being retrieved or not, with special handling
// for the additional check that is required for the SM6 level. This can't be checked
// without creating a device first, so the path for when the target device pointer is
// null is useful to do an initial filtering using D3D12CreateDevice to avoid creating
// a device for adapters that would've failed at the FL11 check already.
if (d3D12Device == null)
{
HRESULT createDeviceResult = FX.D3D12CreateDevice(
dxgiAdapter1.AsIUnknown().Get(),
D3D_FEATURE_LEVEL_11_0,
FX.__uuidof <ID3D12Device>(),
null);
if (FX.SUCCEEDED(createDeviceResult))
{
using ComPtr <ID3D12Device> d3D12DeviceCandidate = default;
createDeviceResult = FX.D3D12CreateDevice(
dxgiAdapter1.AsIUnknown().Get(),
D3D_FEATURE_LEVEL_11_0,
FX.__uuidof <ID3D12Device>(),
d3D12DeviceCandidate.GetVoidAddressOf());
if (FX.SUCCEEDED(createDeviceResult) &&
d3D12DeviceCandidate.Get()->IsShaderModelSupported(D3D_SHADER_MODEL_6_0))
{
return(true);
}
}
}
else
{
using ComPtr <ID3D12Device> d3D12DeviceCandidate = default;
HRESULT createDeviceResult = FX.D3D12CreateDevice(
dxgiAdapter1.AsIUnknown().Get(),
D3D_FEATURE_LEVEL_11_0,
FX.__uuidof <ID3D12Device>(),
d3D12DeviceCandidate.GetVoidAddressOf());
if (FX.SUCCEEDED(createDeviceResult) &&
d3D12DeviceCandidate.Get()->IsShaderModelSupported(D3D_SHADER_MODEL_6_0))
{
d3D12DeviceCandidate.CopyTo(d3D12Device);
dxgiAdapter1.CopyTo(dxgiAdapter);
return(true);
}
}
}
}
/// <inheritdoc/>
public bool MoveNext()
{
if (!this.isInitialized)
{
this.isInitialized = true;
fixed(IDXGIFactory4 **dxgiFactory4 = this.dxgiFactory4)
{
EnableDebugMode();
FX.CreateDXGIFactory2(IDXGIFactoryCreationFlags, FX.__uuidof <IDXGIFactory4>(), (void **)dxgiFactory4).Assert();
}
}
if (this.isCompleted)
{
return(false);
}
while (true)
{
using ComPtr <IDXGIAdapter1> dxgiAdapter1 = default;
HRESULT enumAdapters1Result = this.dxgiFactory4.Get()->EnumAdapters1(this.index, dxgiAdapter1.GetAddressOf());
if (enumAdapters1Result == FX.DXGI_ERROR_NOT_FOUND)
{
this.dxgiFactory4.Get()->EnumWarpAdapter(FX.__uuidof <IDXGIAdapter1>(), dxgiAdapter1.GetVoidAddressOf()).Assert();
DXGI_ADAPTER_DESC1 dxgiDescription1;
dxgiAdapter1.Get()->GetDesc1(&dxgiDescription1).Assert();
HRESULT createDeviceResult = FX.D3D12CreateDevice(
dxgiAdapter1.AsIUnknown().Get(),
D3D_FEATURE_LEVEL_11_0,
FX.__uuidof <ID3D12Device>(),
null);
if (FX.SUCCEEDED(createDeviceResult) &&
this.predicate(new GraphicsDeviceInfo(&dxgiDescription1)))
{
using ComPtr <ID3D12Device> d3D12Device = default;
FX.D3D12CreateDevice(
dxgiAdapter1.AsIUnknown().Get(),
D3D_FEATURE_LEVEL_11_0,
FX.__uuidof <ID3D12Device>(),
d3D12Device.GetVoidAddressOf()).Assert();
this.graphicsDevice = GetOrCreateDevice(d3D12Device.Get(), (IDXGIAdapter *)dxgiAdapter1.Get(), &dxgiDescription1);
this.isCompleted = true;
return(true);
}
return(false);
}
else
{
enumAdapters1Result.Assert();
this.index++;
DXGI_ADAPTER_DESC1 dxgiDescription1;
dxgiAdapter1.Get()->GetDesc1(&dxgiDescription1).Assert();
if (dxgiDescription1.VendorId == MicrosoftVendorId &&
dxgiDescription1.DeviceId == WarpDeviceId)
{
continue;
}
HRESULT createDeviceResult = FX.D3D12CreateDevice(
dxgiAdapter1.AsIUnknown().Get(),
D3D_FEATURE_LEVEL_11_0,
FX.__uuidof <ID3D12Device>(),
null);
if (FX.SUCCEEDED(createDeviceResult) &&
this.predicate(new GraphicsDeviceInfo(&dxgiDescription1)))
{
using ComPtr <ID3D12Device> d3D12Device = default;
FX.D3D12CreateDevice(
dxgiAdapter1.AsIUnknown().Get(),
D3D_FEATURE_LEVEL_11_0,
FX.__uuidof <ID3D12Device>(),
d3D12Device.GetVoidAddressOf()).Assert();
if (d3D12Device.Get()->IsShaderModelSupported(D3D_SHADER_MODEL_6_0))
{
this.graphicsDevice = GetOrCreateDevice(d3D12Device.Get(), (IDXGIAdapter *)dxgiAdapter1.Get(), &dxgiDescription1);
return(true);
}
}
}
}
}
