public VersionedRootSignatureDescription GetRootSignatureDescAtVersion(RootSignatureVersion convertToVersion)
{
IntPtr ptr = GetRootSignatureDescAtVersion_(convertToVersion);
// Marshal the result.
var result = new VersionedRootSignatureDescription();
result.__MarshalFrom(ref Unsafe.AsRef <VersionedRootSignatureDescription.__Native>(ptr.ToPointer()));
return(result);
}
/// <summary>
/// Creates a <see cref="ID3D12RootSignature"/> instance from a description
/// </summary>
/// <param name="rootSignatureDescription">A <see cref="VersionedRootSignatureDescription"/> instance with the info for the new <see cref="ID3D12RootSignature"/> object to create</param>
/// <returns>A new <see cref="ID3D12RootSignature"/> instance to use in a compute shader</returns>
internal ID3D12RootSignature CreateRootSignature(VersionedRootSignatureDescription rootSignatureDescription)
{
return(NativeDevice.CreateRootSignature(rootSignatureDescription));
}
private static async Task Main()
{
// Create graphics device
using GraphicsDevice device = new GraphicsDevice(FeatureLevel.Level11_0);
// Create graphics buffer
int width = 10;
int height = 10;
float[] array = new float[width * height];
for (int i = 0; i < array.Length; i++)
{
array[i] = i;
}
float[] outputArray = new float[width * height];
using GraphicsBuffer <float> sourceBuffer = GraphicsBuffer.ShaderResource.New(device, array.AsSpan());
using GraphicsBuffer <float> destinationBuffer = GraphicsBuffer.UnorderedAccess.New <float>(device, array.Length * 2);
GraphicsBuffer <float> slicedDestinationBuffer = destinationBuffer.Slice(20, 60);
slicedDestinationBuffer = slicedDestinationBuffer.Slice(10, 50);
DescriptorSet descriptorSet = new DescriptorSet(device, 2);
descriptorSet.AddUnorderedAccessViews(slicedDestinationBuffer);
descriptorSet.AddShaderResourceViews(sourceBuffer);
// Generate computer shader
bool generateWithDelegate = true;
ShaderGenerator shaderGenerator = generateWithDelegate
? CreateShaderGeneratorWithDelegate(sourceBuffer, destinationBuffer)
: CreateShaderGeneratorWithClass();
ShaderGeneratorResult result = shaderGenerator.GenerateShader();
// Copmile shader
byte[] shaderBytecode = ShaderCompiler.Compile(DxcShaderStage.ComputeShader, result.ShaderSource, result.EntryPoints["compute"]);
DescriptorRange1[] descriptorRanges = new DescriptorRange1[]
{
new DescriptorRange1(DescriptorRangeType.UnorderedAccessView, 1, 0),
new DescriptorRange1(DescriptorRangeType.ShaderResourceView, 1, 0)
};
RootParameter1 rootParameter = new RootParameter1(new RootDescriptorTable1(descriptorRanges), ShaderVisibility.All);
var rootSignatureDescription = new VersionedRootSignatureDescription(new RootSignatureDescription1(RootSignatureFlags.None, new[] { rootParameter }));
var rootSignature = device.CreateRootSignature(rootSignatureDescription);
PipelineState pipelineState = new PipelineState(device, rootSignature, shaderBytecode);
// Execute computer shader
using (CommandList commandList = new CommandList(device, CommandListType.Compute))
{
commandList.SetPipelineState(pipelineState);
commandList.SetComputeRootDescriptorTable(0, descriptorSet);
commandList.Dispatch(1, 1, 1);
await commandList.FlushAsync();
}
// Print matrix
Console.WriteLine("Before:");
PrintMatrix(array, width, height);
destinationBuffer.GetData(outputArray.AsSpan());
Console.WriteLine();
Console.WriteLine("After:");
PrintMatrix(outputArray, width, height);
}
