public void UpdateTransferFunctionTexture()
{
// TODO: This code is identical with TF loading in the LoadAssets method.
// Could be extracted to common helper class, perhaps also including
// volume texture loading. We call nearly-identical code three times in this file.
// TODO: I suspect the might be another, minor, memory leak here.
// Load transfer function
var transferFunctionTextureDesc = ResourceDescription.Texture1D(Format.R8G8B8A8_UNorm, TransferFunctionWidth, 1);
transferFunctionTexture = device.CreateCommittedResource(new HeapProperties(
HeapType.Default),
HeapFlags.None,
transferFunctionTextureDesc,
ResourceStates.CopyDestination);
long transferFunctionUploadBufferSize = GetRequiredIntermediateSize(this.transferFunctionTexture, 0, 1);
// Create the GPU upload buffer.
transferFunctionTextureUploadHeap = device.CreateCommittedResource(new HeapProperties(
CpuPageProperty.WriteBack,
MemoryPool.L0), HeapFlags.None,
ResourceDescription.Texture1D(Format.R8G8B8A8_UNorm, TransferFunctionWidth, 1),
ResourceStates.GenericRead);
// Copy data to the intermediate upload heap and then schedule a copy
// from the upload heap to the Texture1D.
byte[] transferFunctionTextureData = GenerateTransferFunctionTextureData();
var transferFunctionHandle = GCHandle.Alloc(transferFunctionTextureData, GCHandleType.Pinned);
var transferFunctionPtr = Marshal.UnsafeAddrOfPinnedArrayElement(transferFunctionTextureData, 0);
transferFunctionTextureUploadHeap.WriteToSubresource(0, null, transferFunctionPtr, TransferFunctionWidth, TransferFunctionWidth);
transferFunctionHandle.Free();
commandList.CopyTextureRegion(new TextureCopyLocation(transferFunctionTexture, 0), 0, 0, 0, new TextureCopyLocation(transferFunctionTextureUploadHeap, 0), null);
commandList.ResourceBarrierTransition(this.transferFunctionTexture, ResourceStates.CopyDestination, ResourceStates.PixelShaderResource);
// Describe and create a SRV for the transfer function texture.
var transferFunctionSrvDesc = new ShaderResourceViewDescription
{
Shader4ComponentMapping = D3DXUtilities.DefaultComponentMapping(),
Format = transferFunctionTextureDesc.Format,
Dimension = ShaderResourceViewDimension.Texture1D,
Texture1D = { MipLevels = 1 },
};
var handleIncrement = device.GetDescriptorHandleIncrementSize(DescriptorHeapType.ConstantBufferViewShaderResourceViewUnorderedAccessView);
CpuDescriptorHandle locationDesctiptor = shaderRenderViewHeap.CPUDescriptorHandleForHeapStart + handleIncrement;
device.CreateShaderResourceView(this.transferFunctionTexture, transferFunctionSrvDesc, locationDesctiptor);
// End load transfer function data
}
private void LoadAssets()
{
// Create the root signature description.
var rootSignatureDesc = new RootSignatureDescription(RootSignatureFlags.AllowInputAssemblerInputLayout,
// Root Parameters
new[]
{
new RootParameter(ShaderVisibility.Pixel,
new DescriptorRange()
{
RangeType = DescriptorRangeType.ShaderResourceView,
DescriptorCount = 3,
OffsetInDescriptorsFromTableStart = int.MinValue,
BaseShaderRegister = 0
}),
new RootParameter(ShaderVisibility.Pixel,
new DescriptorRange()
{
RangeType = DescriptorRangeType.ConstantBufferView,
DescriptorCount = 1,
BaseShaderRegister = 0,
OffsetInDescriptorsFromTableStart = int.MinValue,
})
},
// Samplers
new[]
{
new StaticSamplerDescription(ShaderVisibility.Pixel, 0, 0)
{
//Filter = Filter.MinimumMinMagMipPoint,
Filter = Filter.ComparisonMinLinearMagPointMipLinear,
AddressUVW = TextureAddressMode.Border,
}
});
rootSignature = device.CreateRootSignature(0, rootSignatureDesc.Serialize());
// Create the pipeline state, which includes compiling and loading shaders.
var vertexShaderPath = Utils.GetVertexShaderPath();
var pixelShaderPath = Utils.GetPixelShaderForRenderingMode(VolViz.Configuration.RenderingMode.Dvr);
#if DEBUG
var vertexShader = new ShaderBytecode(SharpDX.D3DCompiler.ShaderBytecode.CompileFromFile(vertexShaderPath, "VSMain", "vs_5_0", SharpDX.D3DCompiler.ShaderFlags.Debug));
#else
var vertexShader = new ShaderBytecode(SharpDX.D3DCompiler.ShaderBytecode.CompileFromFile(vertexShaderPath, "VSMain", "vs_5_0"));
#endif
#if DEBUG
var pixelShader = new ShaderBytecode(SharpDX.D3DCompiler.ShaderBytecode.CompileFromFile(pixelShaderPath, "PSMain", "ps_5_0", SharpDX.D3DCompiler.ShaderFlags.Debug));
#else
var pixelShader = new ShaderBytecode(SharpDX.D3DCompiler.ShaderBytecode.CompileFromFile(pixelShaderPath, "PSMain", "ps_5_0"));
#endif
// Define the vertex input layout.
var inputElementDescs = new[]
{
new InputElement("POSITION", 0, Format.R32G32B32_Float, 0, 0),
new InputElement("TEXCOORD", 0, Format.R32G32_Float, 12, 0)
};
// Describe and create the graphics pipeline state object (PSO).
var psoDesc = new GraphicsPipelineStateDescription()
{
InputLayout = new InputLayoutDescription(inputElementDescs),
RootSignature = rootSignature,
VertexShader = vertexShader,
PixelShader = pixelShader,
RasterizerState = RasterizerStateDescription.Default(),
BlendState = BlendStateDescription.Default(),
DepthStencilFormat = SharpDX.DXGI.Format.D32_Float,
DepthStencilState = new DepthStencilStateDescription()
{
IsDepthEnabled = false, IsStencilEnabled = false
},
SampleMask = int.MaxValue,
PrimitiveTopologyType = PrimitiveTopologyType.Triangle,
RenderTargetCount = 1,
Flags = PipelineStateFlags.None,
SampleDescription = new SharpDX.DXGI.SampleDescription(1, 0),
StreamOutput = new StreamOutputDescription()
};
psoDesc.RenderTargetFormats[0] = SharpDX.DXGI.Format.R8G8B8A8_UNorm;
pipelineState = device.CreateGraphicsPipelineState(psoDesc);
// Create the command list.
commandList = device.CreateCommandList(CommandListType.Direct, commandAllocator, pipelineState);
// Define the geometry for a square consisting of two triangles.
var squareVertexes = new[]
{
new Vertex()
{
Position = new Vector3(-1.0f, 1.0f, 0.0f), TexCoord = new Vector2(0.0f, 0.0f)
},
new Vertex()
{
Position = new Vector3(1.0f, 1.0f, 0.0f), TexCoord = new Vector2(1.0f, 0.0f)
},
new Vertex()
{
Position = new Vector3(-1.0f, -1.0f, 0.0f), TexCoord = new Vector2(0.0f, 1.0f)
},
new Vertex()
{
Position = new Vector3(1.0f, 1.0f, 0.0f), TexCoord = new Vector2(1.0f, 0.0f)
},
new Vertex()
{
Position = new Vector3(1.0f, -1.0f, 0.0f), TexCoord = new Vector2(1.0f, 1.0f)
},
new Vertex()
{
Position = new Vector3(-1.0f, -1.0f, 0.0f), TexCoord = new Vector2(0.0f, 1.0f)
},
};
// Create the vertex buffer.
int vertexBufferSize = Utilities.SizeOf(squareVertexes);
// Note: using upload heaps to transfer static data like vert buffers is not
// recommended. Every time the GPU needs it, the upload heap will be marshalled
// over. Please read up on Default Heap usage. An upload heap is used here for
// code simplicity and because there are very few verts to actually transfer.
vertexBuffer = device.CreateCommittedResource(new HeapProperties(HeapType.Upload), HeapFlags.None, ResourceDescription.Buffer(vertexBufferSize), ResourceStates.GenericRead);
// Copy the triangle data to the vertex buffer.
var pVertexDataBegin = vertexBuffer.Map(0);
Utilities.Write(pVertexDataBegin, squareVertexes, 0, squareVertexes.Length);
vertexBuffer.Unmap(0);
// Initialize the vertex buffer view.
vertexBufferView = new VertexBufferView();
vertexBufferView.BufferLocation = vertexBuffer.GPUVirtualAddress;
vertexBufferView.StrideInBytes = Utilities.SizeOf <Vertex>();
vertexBufferView.SizeInBytes = vertexBufferSize;
// Load volume data
var volumeTextureDesc = ResourceDescription.Texture3D(Format.R8G8B8A8_UNorm, VolumeTextureWidth, VolumeTextureHeight, VolumeTextureDepth, 1);
volumeTexture = device.CreateCommittedResource(new HeapProperties(
HeapType.Default),
HeapFlags.None,
volumeTextureDesc,
ResourceStates.CopyDestination);
long volumeUploadBufferSize = GetRequiredIntermediateSize(this.volumeTexture, 0, 1);
// Create the GPU upload buffer.
var volumeTextureUploadHeap = device.CreateCommittedResource(new HeapProperties(
CpuPageProperty.WriteBack,
MemoryPool.L0), HeapFlags.None,
ResourceDescription.Texture3D(Format.R8G8B8A8_UNorm, VolumeTextureWidth, VolumeTextureHeight, VolumeTextureDepth, 1),
ResourceStates.GenericRead);
// Copy data to the intermediate upload heap and then schedule a copy
// from the upload heap to the Texture3D.
byte[] volumeTextureData = GenerateVolumeTextureData();
var volumeHandle = GCHandle.Alloc(volumeTextureData, GCHandleType.Pinned);
var volumePtr = Marshal.UnsafeAddrOfPinnedArrayElement(volumeTextureData, 0);
volumeTextureUploadHeap.WriteToSubresource(0, null, volumePtr, TexturePixelSize * VolumeTextureWidth, TexturePixelSize * VolumeTextureWidth * VolumeTextureHeight);
volumeHandle.Free();
commandList.CopyTextureRegion(new TextureCopyLocation(volumeTexture, 0), 0, 0, 0, new TextureCopyLocation(volumeTextureUploadHeap, 0), null);
commandList.ResourceBarrierTransition(this.volumeTexture, ResourceStates.CopyDestination, ResourceStates.PixelShaderResource);
// Describe and create a SRV for the volume texture.
var volumeSrvDesc = new ShaderResourceViewDescription
{
Shader4ComponentMapping = D3DXUtilities.DefaultComponentMapping(),
Format = volumeTextureDesc.Format,
Dimension = ShaderResourceViewDimension.Texture3D,
Texture3D = { MipLevels = 1 },
};
device.CreateShaderResourceView(this.volumeTexture, volumeSrvDesc, shaderRenderViewHeap.CPUDescriptorHandleForHeapStart);
// End load volume data
// Load transfer function
var transferFunctionTextureDesc = ResourceDescription.Texture1D(Format.R8G8B8A8_UNorm, TransferFunctionWidth, 1);
transferFunctionTexture = device.CreateCommittedResource(new HeapProperties(
HeapType.Default),
HeapFlags.None,
transferFunctionTextureDesc,
ResourceStates.CopyDestination);
long transferFunctionUploadBufferSize = GetRequiredIntermediateSize(this.transferFunctionTexture, 0, 1);
// Create the GPU upload buffer.
var transferFunctionTextureUploadHeap = device.CreateCommittedResource(new HeapProperties(
CpuPageProperty.WriteBack,
MemoryPool.L0), HeapFlags.None,
ResourceDescription.Texture1D(Format.R8G8B8A8_UNorm, TransferFunctionWidth, 1),
ResourceStates.GenericRead);
// Copy data to the intermediate upload heap and then schedule a copy
// from the upload heap to the Texture1D.
byte[] transferFunctionTextureData = GenerateTransferFunctionTextureData();
var transferFunctionHandle = GCHandle.Alloc(transferFunctionTextureData, GCHandleType.Pinned);
var transferFunctionPtr = Marshal.UnsafeAddrOfPinnedArrayElement(transferFunctionTextureData, 0);
transferFunctionTextureUploadHeap.WriteToSubresource(0, null, transferFunctionPtr, TransferFunctionWidth, TransferFunctionWidth);
transferFunctionHandle.Free();
commandList.CopyTextureRegion(new TextureCopyLocation(transferFunctionTexture, 0), 0, 0, 0, new TextureCopyLocation(transferFunctionTextureUploadHeap, 0), null);
commandList.ResourceBarrierTransition(this.transferFunctionTexture, ResourceStates.CopyDestination, ResourceStates.PixelShaderResource);
// Describe and create a SRV for the transfer function texture.
var transferFunctionSrvDesc = new ShaderResourceViewDescription
{
Shader4ComponentMapping = D3DXUtilities.DefaultComponentMapping(),
Format = transferFunctionTextureDesc.Format,
Dimension = ShaderResourceViewDimension.Texture1D,
Texture1D = { MipLevels = 1 },
};
var transferFunctionHandleIncrement = device.GetDescriptorHandleIncrementSize(DescriptorHeapType.ConstantBufferViewShaderResourceViewUnorderedAccessView);
CpuDescriptorHandle transferFunctionLocationDesctiptor = shaderRenderViewHeap.CPUDescriptorHandleForHeapStart + transferFunctionHandleIncrement;
device.CreateShaderResourceView(this.transferFunctionTexture, transferFunctionSrvDesc, transferFunctionLocationDesctiptor);
// End load transfer function data
// Load gradients data
var gradientsTextureDesc = ResourceDescription.Texture3D(Format.R8G8B8A8_UNorm, VolumeTextureWidth, VolumeTextureHeight, VolumeTextureDepth, 1);
gradientsTexture = device.CreateCommittedResource(new HeapProperties(
HeapType.Default),
HeapFlags.None,
gradientsTextureDesc,
ResourceStates.CopyDestination);
long gradientsUploadBufferSize = GetRequiredIntermediateSize(this.gradientsTexture, 0, 1);
// Create the GPU upload buffer.
var gradientsTextureUploadHeap = device.CreateCommittedResource(new HeapProperties(
CpuPageProperty.WriteBack,
MemoryPool.L0), HeapFlags.None,
ResourceDescription.Texture3D(Format.R8G8B8A8_UNorm, VolumeTextureWidth, VolumeTextureHeight, VolumeTextureDepth, 1),
ResourceStates.GenericRead);
// Copy data to the intermediate upload heap and then schedule a copy
// from the upload heap to the Texture3D.
byte[] gradientsTextureData = GenerateGradientsTextureData();
var gradientsHandle = GCHandle.Alloc(gradientsTextureData, GCHandleType.Pinned);
var gradientsPtr = Marshal.UnsafeAddrOfPinnedArrayElement(gradientsTextureData, 0);
gradientsTextureUploadHeap.WriteToSubresource(0, null, gradientsPtr, TexturePixelSize * VolumeTextureWidth, TexturePixelSize * VolumeTextureWidth * VolumeTextureHeight);
gradientsHandle.Free();
commandList.CopyTextureRegion(new TextureCopyLocation(gradientsTexture, 0), 0, 0, 0, new TextureCopyLocation(gradientsTextureUploadHeap, 0), null);
commandList.ResourceBarrierTransition(this.gradientsTexture, ResourceStates.CopyDestination, ResourceStates.PixelShaderResource);
// Describe and create a SRV for the gradients texture.
var gradientsSrvDesc = new ShaderResourceViewDescription
{
Shader4ComponentMapping = D3DXUtilities.DefaultComponentMapping(),
Format = gradientsTextureDesc.Format,
Dimension = ShaderResourceViewDimension.Texture3D,
Texture3D = { MipLevels = 1 },
};
var gradientsHandleIncrement = device.GetDescriptorHandleIncrementSize(DescriptorHeapType.ConstantBufferViewShaderResourceViewUnorderedAccessView);
CpuDescriptorHandle gradientsLocationDesctiptor = shaderRenderViewHeap.CPUDescriptorHandleForHeapStart + gradientsHandleIncrement * 2;
device.CreateShaderResourceView(this.gradientsTexture, gradientsSrvDesc, gradientsLocationDesctiptor);
// End load gradients data
// Command lists are created in the recording state, but there is nothing
// to record yet. The main loop expects it to be closed, so close it now.
commandList.Close();
constantBuffer = device.CreateCommittedResource(new HeapProperties(HeapType.Upload), HeapFlags.None, ResourceDescription.Buffer(1024 * 64), ResourceStates.GenericRead);
//// Describe and create a constant buffer view.
var cbvDesc = new ConstantBufferViewDescription
{
BufferLocation = constantBuffer.GPUVirtualAddress,
SizeInBytes = (Utilities.SizeOf <ConstantBuffer>() + 255) & ~255
};
device.CreateConstantBufferView(cbvDesc, constantBufferViewHeap.CPUDescriptorHandleForHeapStart);
// Initialize and map the constant buffers. We don't unmap this until the
// app closes. Keeping things mapped for the lifetime of the resource is okay.
constantBufferPointer = constantBuffer.Map(0);
Utilities.Write(constantBufferPointer, ref constantBufferData);
commandQueue.ExecuteCommandList(commandList);
// Create synchronization objects.
fence = device.CreateFence(0, FenceFlags.None);
fenceValue = 1;
// Create an event handle to use for frame synchronization.
fenceEvent = new AutoResetEvent(false);
WaitForPreviousFrame();
//release temp texture
volumeTextureUploadHeap.Dispose();
transferFunctionTextureUploadHeap.Dispose();
gradientsTextureUploadHeap.Dispose();
}