public ID3D12DescriptorHeap RequestNewHeap(DescriptorHeapType type, int descriptorCount)
{
lock (_heapAllocationLock)
{
var flags = DescriptorHeapFlags.None;
if (type == DescriptorHeapType.ConstantBufferViewShaderResourceViewUnorderedAccessView ||
type == DescriptorHeapType.Sampler)
{
flags = DescriptorHeapFlags.ShaderVisible;
}
var heapDescription = new DescriptorHeapDescription
{
Type = type,
DescriptorCount = descriptorCount,
Flags = flags,
NodeMask = 0,
};
var heap = D3D12Device.CreateDescriptorHeap(heapDescription);
_descriptorHeapPool.Add(heap);
return(heap);
}
}
private ID3D12DescriptorHeap CreateDescriptorHeap(ID3D12Device device, int count, DescriptorHeapType type, bool shaderVisible)
{
DescriptorHeapDescription desc = new DescriptorHeapDescription();
desc.DescriptorCount = count;
desc.Flags = shaderVisible ? DescriptorHeapFlags.ShaderVisible : DescriptorHeapFlags.None;
desc.Type = type;
return(device.CreateDescriptorHeap(desc));
}
internal CpuDescriptorHandle GetRenderTargetView(ID3D12Device device, int mipLevel, int faceIndex)
{
if (renderTargetView == null)
{
ThrowIfFailed(device.CreateDescriptorHeap(new DescriptorHeapDescription(DescriptorHeapType.RenderTargetView, 1), out renderTargetView));
device.CreateRenderTargetView(resource, new RenderTargetViewDescription()
{
Texture2DArray = new Texture2DArrayRenderTargetView()
{
MipSlice = mipLevel,
ArraySize = 1,
FirstArraySlice = faceIndex,
}
}, renderTargetView.GetCPUDescriptorHandleForHeapStart());
}
return(renderTargetView.GetCPUDescriptorHandleForHeapStart());
}
/// <summary>
/// Creates a new <see cref="DescriptorAllocator"/> instance with the specified parameters
/// </summary>
/// <param name="device">The <see cref="ID3D12Device"/> instance to use</param>
public DescriptorAllocator(ID3D12Device device)
{
DescriptorSize = device.GetDescriptorHandleIncrementSize(DescriptorHeapType.ConstantBufferViewShaderResourceViewUnorderedAccessView);
DescriptorHeapDescription descriptorHeapDescription = new DescriptorHeapDescription
{
DescriptorCount = DescriptorsPerHeap,
Flags = DescriptorHeapFlags.ShaderVisible,
Type = DescriptorHeapType.ConstantBufferViewShaderResourceViewUnorderedAccessView
};
DescriptorHeap = device.CreateDescriptorHeap(descriptorHeapDescription);
_RemainingHandles = DescriptorsPerHeap;
_CurrentCpuHandle = DescriptorHeap.GetCPUDescriptorHandleForHeapStart();
_CurrentGpuHandle = DescriptorHeap.GetGPUDescriptorHandleForHeapStart();
}
protected Application(bool useDirect3D12)
{
_wndProc = ProcessWindowMessage;
var wndClassEx = new WNDCLASSEX
{
Size = Unsafe.SizeOf <WNDCLASSEX>(),
Styles = WindowClassStyles.CS_HREDRAW | WindowClassStyles.CS_VREDRAW | WindowClassStyles.CS_OWNDC,
WindowProc = _wndProc,
InstanceHandle = HInstance,
CursorHandle = LoadCursor(IntPtr.Zero, SystemCursor.IDC_ARROW),
BackgroundBrushHandle = IntPtr.Zero,
IconHandle = IntPtr.Zero,
ClassName = WndClassName,
};
var atom = RegisterClassEx(ref wndClassEx);
if (atom == 0)
{
throw new InvalidOperationException(
$"Failed to register window class. Error: {Marshal.GetLastWin32Error()}"
);
}
Window = new Window("Vortice", 800, 600);
if (useDirect3D12 &&
!ID3D12Device.IsSupported(null, FeatureLevel.Level_11_0))
{
useDirect3D12 = false;
}
var debugFactory = false;
#if DEBUG
if (useDirect3D12)
{
if (D3D12GetDebugInterface <ID3D12Debug>(out var debug).Success)
{
debug.EnableDebugLayer();
debugFactory = true;
}
}
#endif
if (useDirect3D12)
{
if (CreateDXGIFactory2(debugFactory, out IDXGIFactory4 dxgiFactory4).Failure)
{
throw new InvalidOperationException("Cannot create IDXGIFactory4");
}
_dxgiFactory = dxgiFactory4;
}
else
{
if (CreateDXGIFactory2(debugFactory, out _dxgiFactory).Failure)
{
throw new InvalidOperationException("Cannot create IDXGIFactory4");
}
}
if (useDirect3D12)
{
Debug.Assert(D3D12CreateDevice(null, FeatureLevel.Level_11_0, out _d3d12Device).Success);
_d3d12CommandQueue = _d3d12Device.CreateCommandQueue(new CommandQueueDescription(CommandListType.Direct, CommandQueuePriority.Normal));
}
else
{
var featureLevels = new FeatureLevel[]
{
FeatureLevel.Level_11_1,
FeatureLevel.Level_11_0
};
Debug.Assert(ID3D11Device.TryCreate(
null,
DriverType.Hardware,
DeviceCreationFlags.BgraSupport,
featureLevels,
out _d3d11Device,
out _d3d11DeviceContext).Success);
}
var swapChainDesc = new SwapChainDescription1
{
BufferCount = FrameCount,
Width = Window.Width,
Height = Window.Height,
Format = Format.B8G8R8A8_UNorm,
Usage = Vortice.Usage.RenderTargetOutput,
SwapEffect = SwapEffect.FlipDiscard,
SampleDescription = new SampleDescription(1, 0)
};
SwapChain = DXGIFactory.CreateSwapChainForHwnd(_d3d12CommandQueue, Window.Handle, swapChainDesc);
DXGIFactory.MakeWindowAssociation(Window.Handle, WindowAssociationFlags.IgnoreAltEnter);
if (useDirect3D12)
{
SwapChain3 = SwapChain.QueryInterface <IDXGISwapChain3>();
_frameIndex = SwapChain3.GetCurrentBackBufferIndex();
}
_rtvHeap = _d3d12Device.CreateDescriptorHeap(new DescriptorHeapDescription(DescriptorHeapType.RenderTargetView, FrameCount));
_rtvDescriptorSize = _d3d12Device.GetDescriptorHandleIncrementSize(DescriptorHeapType.RenderTargetView);
// Create frame resources.
{
var rtvHandle = _rtvHeap.GetCPUDescriptorHandleForHeapStart();
// Create a RTV for each frame.
_renderTargets = new ID3D12Resource[FrameCount];
for (var i = 0; i < FrameCount; i++)
{
_renderTargets[i] = SwapChain.GetBuffer <ID3D12Resource>(i);
_d3d12Device.CreateRenderTargetView(_renderTargets[i], null, rtvHandle);
rtvHandle += _rtvDescriptorSize;
}
}
_commandAllocator = _d3d12Device.CreateCommandAllocator(CommandListType.Direct);
_commandList = _d3d12Device.CreateCommandList(CommandListType.Direct, _commandAllocator);
_commandList.Close();
// Create synchronization objects.
_d3d12Fence = _d3d12Device.CreateFence(0);
_fenceValue = 1;
_fenceEvent = new AutoResetEvent(false);
}