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Copy pathDDGI_D3D12.cpp
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DDGI_D3D12.cpp
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/*
* Copyright (c) 2019-2023, NVIDIA CORPORATION. All rights reserved.
*
* NVIDIA CORPORATION and its licensors retain all intellectual property
* and proprietary rights in and to this software, related documentation
* and any modifications thereto. Any use, reproduction, disclosure or
* distribution of this software and related documentation without an express
* license agreement from NVIDIA CORPORATION is strictly prohibited.
*/
#include "graphics/DDGI.h"
#ifdef GFX_PERF_MARKERS
#include <pix.h>
#endif
using namespace rtxgi;
using namespace rtxgi::d3d12;
#if (RTXGI_DDGI_BINDLESS_RESOURCES && RTXGI_DDGI_RESOURCE_MANAGEMENT)
#error RTXGI SDK DDGI Managed Mode is not compatible with bindless resources!
#endif
namespace Graphics
{
namespace D3D12
{
namespace DDGI
{
//----------------------------------------------------------------------------------------------------------
// DDGIVolume Resource Creation Functions (Unmanaged Mode)
//----------------------------------------------------------------------------------------------------------
#if !RTXGI_DDGI_RESOURCE_MANAGEMENT
/**
* Create the resources used by a DDGIVolume.
*/
bool CreateDDGIVolumeResources(
Globals& d3d,
GlobalResources& d3dResources,
Resources& resources,
const DDGIVolumeDesc& volumeDesc,
DDGIVolumeResources& volumeResources,
std::vector<Shaders::ShaderProgram>& shaders,
std::ofstream& log)
{
log << "\tCreating resources for DDGIVolume: \"" << volumeDesc.name << "\"...";
std::flush(log);
UINT arraySize = 0;
UINT variabilityAverageArraySize = 0;
// Create the texture arrays
{
UINT width = 0;
UINT height = 0;
DXGI_FORMAT format = DXGI_FORMAT_UNKNOWN;
// Probe ray data texture
{
GetDDGIVolumeTextureDimensions(volumeDesc, EDDGIVolumeTextureType::RayData, width, height, arraySize);
format = GetDDGIVolumeTextureFormat(EDDGIVolumeTextureType::RayData, volumeDesc.probeRayDataFormat);
TextureDesc desc = { width, height, arraySize, 1, format, D3D12_RESOURCE_STATE_UNORDERED_ACCESS, D3D12_RESOURCE_FLAG_ALLOW_UNORDERED_ACCESS };
CHECK(CreateTexture(d3d, desc, &volumeResources.unmanaged.probeRayData), "create DDGIVolume ray data texture array!", log);
#ifdef GFX_NAME_OBJECTS
std::wstring name = L"DDGIVolume[" + std::to_wstring(volumeDesc.index) + L"], Probe Ray Data";
volumeResources.unmanaged.probeRayData->SetName(name.c_str());
#endif
}
// Probe irradiance texture
{
GetDDGIVolumeTextureDimensions(volumeDesc, EDDGIVolumeTextureType::Irradiance, width, height, arraySize);
format = GetDDGIVolumeTextureFormat(EDDGIVolumeTextureType::Irradiance, volumeDesc.probeIrradianceFormat);
TextureDesc desc = { width, height, arraySize, 1, format, D3D12_RESOURCE_STATE_NON_PIXEL_SHADER_RESOURCE, D3D12_RESOURCE_FLAG_ALLOW_UNORDERED_ACCESS | D3D12_RESOURCE_FLAG_ALLOW_RENDER_TARGET };
CHECK(CreateTexture(d3d, desc, &volumeResources.unmanaged.probeIrradiance), "create DDGIVolume probe irradiance texture array!", log);
#ifdef GFX_NAME_OBJECTS
std::wstring name = L"DDGIVolume[" + std::to_wstring(volumeDesc.index) + L"], Probe Irradiance";
volumeResources.unmanaged.probeIrradiance->SetName(name.c_str());
#endif
}
// Probe distance texture
{
GetDDGIVolumeTextureDimensions(volumeDesc, EDDGIVolumeTextureType::Distance, width, height, arraySize);
format = GetDDGIVolumeTextureFormat(EDDGIVolumeTextureType::Distance, volumeDesc.probeDistanceFormat);
TextureDesc desc = { width, height, arraySize, 1, format, D3D12_RESOURCE_STATE_NON_PIXEL_SHADER_RESOURCE, D3D12_RESOURCE_FLAG_ALLOW_UNORDERED_ACCESS | D3D12_RESOURCE_FLAG_ALLOW_RENDER_TARGET };
CHECK(CreateTexture(d3d, desc, &volumeResources.unmanaged.probeDistance), "create DDGIVolume probe distance texture array!", log);
#ifdef GFX_NAME_OBJECTS
std::wstring name = L"DDGIVolume[" + std::to_wstring(volumeDesc.index) + L"], Probe Distance";
volumeResources.unmanaged.probeDistance->SetName(name.c_str());
#endif
}
// Probe data texture
{
GetDDGIVolumeTextureDimensions(volumeDesc, EDDGIVolumeTextureType::Data, width, height, arraySize);
if (width <= 0 || height <= 0) return false;
format = GetDDGIVolumeTextureFormat(EDDGIVolumeTextureType::Data, volumeDesc.probeDataFormat);
TextureDesc desc = { width, height, arraySize, 1, format, D3D12_RESOURCE_STATE_NON_PIXEL_SHADER_RESOURCE, D3D12_RESOURCE_FLAG_ALLOW_UNORDERED_ACCESS };
CHECK(CreateTexture(d3d, desc, &volumeResources.unmanaged.probeData), "create DDGIVolume probe data texture array!", log);
#ifdef GFX_NAME_OBJECTS
std::wstring name = L"DDGIVolume[" + std::to_wstring(volumeDesc.index) + L"], Probe Data";
volumeResources.unmanaged.probeData->SetName(name.c_str());
#endif
}
// Probe variability texture
{
GetDDGIVolumeTextureDimensions(volumeDesc, EDDGIVolumeTextureType::Variability, width, height, arraySize);
if (width <= 0 || height <= 0) return false;
format = GetDDGIVolumeTextureFormat(EDDGIVolumeTextureType::Variability, volumeDesc.probeVariabilityFormat);
TextureDesc desc = { width, height, arraySize, 1, format, D3D12_RESOURCE_STATE_UNORDERED_ACCESS, D3D12_RESOURCE_FLAG_ALLOW_UNORDERED_ACCESS };
CHECK(CreateTexture(d3d, desc, &volumeResources.unmanaged.probeVariability), "create DDGIVolume Probe variability texture!", log);
#ifdef GFX_NAME_OBJECTS
std::wstring name = L"DDGIVolume[" + std::to_wstring(volumeDesc.index) + L"], Probe Variability";
volumeResources.unmanaged.probeVariability->SetName(name.c_str());
#endif
}
// Probe variability average
{
GetDDGIVolumeTextureDimensions(volumeDesc, EDDGIVolumeTextureType::VariabilityAverage, width, height, variabilityAverageArraySize);
if (width <= 0 || height <= 0) return false;
format = GetDDGIVolumeTextureFormat(EDDGIVolumeTextureType::VariabilityAverage, volumeDesc.probeVariabilityFormat);
TextureDesc desc = { width, height, variabilityAverageArraySize, 1, format, D3D12_RESOURCE_STATE_UNORDERED_ACCESS, D3D12_RESOURCE_FLAG_ALLOW_UNORDERED_ACCESS };
CHECK(CreateTexture(d3d, desc, &volumeResources.unmanaged.probeVariabilityAverage), "create DDGIVolume Probe variability average texture!", log);
#ifdef GFX_NAME_OBJECTS
std::wstring name = L"DDGIVolume[" + std::to_wstring(volumeDesc.index) + L"], Probe Variability Average";
volumeResources.unmanaged.probeVariabilityAverage->SetName(name.c_str());
#endif
BufferDesc readbackDesc = { sizeof(float)*2, 0, EHeapType::READBACK, D3D12_RESOURCE_STATE_COPY_DEST, D3D12_RESOURCE_FLAG_NONE };
CHECK(CreateBuffer(d3d, readbackDesc, &volumeResources.unmanaged.probeVariabilityReadback), "create DDGIVolume Probe variability readback buffer!", log);
#ifdef GFX_NAME_OBJECTS
name = L"DDGIVolume[" + std::to_wstring(volumeDesc.index) + L"], Probe Variability Readback";
volumeResources.unmanaged.probeVariabilityReadback->SetName(name.c_str());
#endif
}
}
// Create the resource descriptors
{
D3D12_CPU_DESCRIPTOR_HANDLE srvHandle, uavHandle;
D3D12_CPU_DESCRIPTOR_HANDLE heapStart = volumeResources.descriptorHeap.resources->GetCPUDescriptorHandleForHeapStart();
D3D12_CPU_DESCRIPTOR_HANDLE rtvHeapStart = resources.rtvDescriptorHeap->GetCPUDescriptorHandleForHeapStart();
UINT rtvDescSize = d3d.device->GetDescriptorHandleIncrementSize(D3D12_DESCRIPTOR_HEAP_TYPE_RTV);
// Describe resource views (RTVs are used for clearing the texture arrays)
D3D12_RENDER_TARGET_VIEW_DESC rtvDesc = {};
rtvDesc.ViewDimension = D3D12_RTV_DIMENSION_TEXTURE2DARRAY;
rtvDesc.Texture2DArray.ArraySize = arraySize;
D3D12_UNORDERED_ACCESS_VIEW_DESC uavDesc = {};
uavDesc.ViewDimension = D3D12_UAV_DIMENSION_TEXTURE2DARRAY;
uavDesc.Texture2DArray.ArraySize = arraySize;
D3D12_SHADER_RESOURCE_VIEW_DESC srvDesc = {};
srvDesc.ViewDimension = D3D12_SRV_DIMENSION_TEXTURE2DARRAY;
srvDesc.Texture2DArray.ArraySize = arraySize;
srvDesc.Texture2DArray.MipLevels = 1;
srvDesc.Shader4ComponentMapping = D3D12_DEFAULT_SHADER_4_COMPONENT_MAPPING;
// Get the volume's descriptor heap info
const DDGIVolumeDescriptorHeapDesc& heapDesc = volumeResources.descriptorHeap;
// Get the volume's resource indices (on the descriptor heap)
const DDGIVolumeResourceIndices& resourceIndices = heapDesc.resourceIndices;
// Ray Data texture descriptors
{
uavHandle.ptr = heapStart.ptr + (resourceIndices.rayDataUAVIndex * heapDesc.entrySize);
srvHandle.ptr = heapStart.ptr + (resourceIndices.rayDataSRVIndex * heapDesc.entrySize);
srvDesc.Format = uavDesc.Format = GetDDGIVolumeTextureFormat(EDDGIVolumeTextureType::RayData, volumeDesc.probeRayDataFormat);
d3d.device->CreateUnorderedAccessView(volumeResources.unmanaged.probeRayData, nullptr, &uavDesc, uavHandle);
d3d.device->CreateShaderResourceView(volumeResources.unmanaged.probeRayData, &srvDesc, srvHandle);
}
// Probe Irradiance texture array descriptors
{
uavHandle.ptr = heapStart.ptr + (resourceIndices.probeIrradianceUAVIndex * heapDesc.entrySize);
srvHandle.ptr = heapStart.ptr + (resourceIndices.probeIrradianceSRVIndex * heapDesc.entrySize);
volumeResources.unmanaged.probeIrradianceRTV.ptr = rtvHeapStart.ptr + (volumeDesc.index * GetDDGIVolumeNumRTVDescriptors() * rtvDescSize);
srvDesc.Format = uavDesc.Format = rtvDesc.Format = GetDDGIVolumeTextureFormat(EDDGIVolumeTextureType::Irradiance, volumeDesc.probeIrradianceFormat);
d3d.device->CreateUnorderedAccessView(volumeResources.unmanaged.probeIrradiance, nullptr, &uavDesc, uavHandle);
d3d.device->CreateShaderResourceView(volumeResources.unmanaged.probeIrradiance, &srvDesc, srvHandle);
d3d.device->CreateRenderTargetView(volumeResources.unmanaged.probeIrradiance, &rtvDesc, volumeResources.unmanaged.probeIrradianceRTV);
}
// Probe Distance texture array descriptors
{
uavHandle.ptr = heapStart.ptr + (resourceIndices.probeDistanceUAVIndex * heapDesc.entrySize);
srvHandle.ptr = heapStart.ptr + (resourceIndices.probeDistanceSRVIndex * heapDesc.entrySize);
volumeResources.unmanaged.probeDistanceRTV.ptr = rtvHeapStart.ptr + ((volumeDesc.index * GetDDGIVolumeNumRTVDescriptors() + 1) * rtvDescSize);
srvDesc.Format = uavDesc.Format = rtvDesc.Format = GetDDGIVolumeTextureFormat(EDDGIVolumeTextureType::Distance, volumeDesc.probeDistanceFormat);
d3d.device->CreateUnorderedAccessView(volumeResources.unmanaged.probeDistance, nullptr, &uavDesc, uavHandle);
d3d.device->CreateShaderResourceView(volumeResources.unmanaged.probeDistance, &srvDesc, srvHandle);
d3d.device->CreateRenderTargetView(volumeResources.unmanaged.probeDistance, &rtvDesc, volumeResources.unmanaged.probeDistanceRTV);
}
// Probe Data texture array descriptors
{
uavHandle.ptr = heapStart.ptr + (resourceIndices.probeDataUAVIndex * heapDesc.entrySize);
srvHandle.ptr = heapStart.ptr + (resourceIndices.probeDataSRVIndex * heapDesc.entrySize);
srvDesc.Format = uavDesc.Format = GetDDGIVolumeTextureFormat(EDDGIVolumeTextureType::Data, volumeDesc.probeDataFormat);
d3d.device->CreateUnorderedAccessView(volumeResources.unmanaged.probeData, nullptr, &uavDesc, uavHandle);
d3d.device->CreateShaderResourceView(volumeResources.unmanaged.probeData, &srvDesc, srvHandle);
}
// Probe variability texture descriptors
{
uavHandle.ptr = heapStart.ptr + (resourceIndices.probeVariabilityUAVIndex * heapDesc.entrySize);
srvHandle.ptr = heapStart.ptr + (resourceIndices.probeVariabilitySRVIndex * heapDesc.entrySize);
srvDesc.Format = uavDesc.Format = GetDDGIVolumeTextureFormat(EDDGIVolumeTextureType::Variability, volumeDesc.probeVariabilityFormat);
d3d.device->CreateUnorderedAccessView(volumeResources.unmanaged.probeVariability, nullptr, &uavDesc, uavHandle);
d3d.device->CreateShaderResourceView(volumeResources.unmanaged.probeVariability, &srvDesc, srvHandle);
}
// Probe variability average texture descriptors
{
uavHandle.ptr = heapStart.ptr + (resourceIndices.probeVariabilityAverageUAVIndex * heapDesc.entrySize);
srvHandle.ptr = heapStart.ptr + (resourceIndices.probeVariabilityAverageSRVIndex * heapDesc.entrySize);
srvDesc.Format = uavDesc.Format = GetDDGIVolumeTextureFormat(EDDGIVolumeTextureType::VariabilityAverage, volumeDesc.probeVariabilityFormat);
srvDesc.Texture2DArray.ArraySize = uavDesc.Texture2DArray.ArraySize = variabilityAverageArraySize;
d3d.device->CreateUnorderedAccessView(volumeResources.unmanaged.probeVariabilityAverage, nullptr, &uavDesc, uavHandle);
d3d.device->CreateShaderResourceView(volumeResources.unmanaged.probeVariabilityAverage, &srvDesc, srvHandle);
}
}
// Set or create the root signature
{
#if RTXGI_DDGI_BINDLESS_RESOURCES
// Pass a pointer to the global root signature
volumeResources.unmanaged.rootSignature = d3dResources.rootSignature;
#else
// Create the volume's root signature (when not using bindless and the global root signature)
ID3DBlob* signature = nullptr;
if (!GetDDGIVolumeRootSignatureDesc(volumeResources.descriptorHeap, signature)) return false;
D3DCHECK(d3d.device->CreateRootSignature(0, signature->GetBufferPointer(), signature->GetBufferSize(), IID_PPV_ARGS(&volumeResources.unmanaged.rootSignature)));
SAFE_RELEASE(signature);
#ifdef GFX_NAME_OBJECTS
std::wstring name = L"DDGIVolume[" + std::to_wstring(volumeDesc.index) + L"], Root Signature ";
volumeResources.unmanaged.rootSignature->SetName(name.c_str());
#endif
#endif
}
// Create the pipeline state objects
{
D3D12_COMPUTE_PIPELINE_STATE_DESC desc = {};
desc.pRootSignature = volumeResources.unmanaged.rootSignature;
UINT shaderIndex = 0;
// Probe Irradiance Blending PSO
{
desc.CS.BytecodeLength = shaders[shaderIndex].bytecode->GetBufferSize();
desc.CS.pShaderBytecode = shaders[shaderIndex].bytecode->GetBufferPointer();
D3DCHECK(d3d.device->CreateComputePipelineState(&desc, IID_PPV_ARGS(&volumeResources.unmanaged.probeBlendingIrradiancePSO)));
#ifdef GFX_NAME_OBJECTS
std::wstring name = L"DDGIVolume[" + std::to_wstring(volumeDesc.index) + L"], Probe Irradiance Blending PSO";
volumeResources.unmanaged.probeBlendingIrradiancePSO->SetName(name.c_str());
#endif
shaderIndex++;
}
// Probe Distance Blending PSO
{
desc.CS.BytecodeLength = shaders[shaderIndex].bytecode->GetBufferSize();
desc.CS.pShaderBytecode = shaders[shaderIndex].bytecode->GetBufferPointer();
D3DCHECK(d3d.device->CreateComputePipelineState(&desc, IID_PPV_ARGS(&volumeResources.unmanaged.probeBlendingDistancePSO)));
#ifdef GFX_NAME_OBJECTS
std::wstring name = L"DDGIVolume[" + std::to_wstring(volumeDesc.index) + L"], Probe Distance Blending PSO";
volumeResources.unmanaged.probeBlendingDistancePSO->SetName(name.c_str());
#endif
shaderIndex++;
}
// Probe Relocation PSO
{
desc.CS.BytecodeLength = shaders[shaderIndex].bytecode->GetBufferSize();
desc.CS.pShaderBytecode = shaders[shaderIndex].bytecode->GetBufferPointer();
D3DCHECK(d3d.device->CreateComputePipelineState(&desc, IID_PPV_ARGS(&volumeResources.unmanaged.probeRelocation.updatePSO)));
#ifdef GFX_NAME_OBJECTS
std::wstring name = L"DDGIVolume[" + std::to_wstring(volumeDesc.index) + L"], Probe Relocation PSO";
volumeResources.unmanaged.probeRelocation.updatePSO->SetName(name.c_str());
#endif
shaderIndex++;
}
// Probe Relocation Reset PSO
{
desc.CS.BytecodeLength = shaders[shaderIndex].bytecode->GetBufferSize();
desc.CS.pShaderBytecode = shaders[shaderIndex].bytecode->GetBufferPointer();
D3DCHECK(d3d.device->CreateComputePipelineState(&desc, IID_PPV_ARGS(&volumeResources.unmanaged.probeRelocation.resetPSO)));
#ifdef GFX_NAME_OBJECTS
std::wstring name = L"DDGIVolume[" + std::to_wstring(volumeDesc.index) + L"], Probe Relocation Reset PSO";
volumeResources.unmanaged.probeRelocation.resetPSO->SetName(name.c_str());
#endif
shaderIndex++;
}
// Probe Classification PSO
{
desc.CS.BytecodeLength = shaders[shaderIndex].bytecode->GetBufferSize();
desc.CS.pShaderBytecode = shaders[shaderIndex].bytecode->GetBufferPointer();
D3DCHECK(d3d.device->CreateComputePipelineState(&desc, IID_PPV_ARGS(&volumeResources.unmanaged.probeClassification.updatePSO)));
#ifdef GFX_NAME_OBJECTS
std::wstring name = L"DDGIVolume[" + std::to_wstring(volumeDesc.index) + L"], Probe Classification PSO";
volumeResources.unmanaged.probeClassification.updatePSO->SetName(name.c_str());
#endif
shaderIndex++;
}
// Probe Classification Reset PSO
{
desc.CS.BytecodeLength = shaders[shaderIndex].bytecode->GetBufferSize();
desc.CS.pShaderBytecode = shaders[shaderIndex].bytecode->GetBufferPointer();
D3DCHECK(d3d.device->CreateComputePipelineState(&desc, IID_PPV_ARGS(&volumeResources.unmanaged.probeClassification.resetPSO)));
#ifdef GFX_NAME_OBJECTS
std::wstring name = L"DDGIVolume[" + std::to_wstring(volumeDesc.index) + L"], Probe Classification Reset PSO";
volumeResources.unmanaged.probeClassification.resetPSO->SetName(name.c_str());
#endif
shaderIndex++;
}
// Probe Variability Reduction PSO
{
desc.CS.BytecodeLength = shaders[shaderIndex].bytecode->GetBufferSize();
desc.CS.pShaderBytecode = shaders[shaderIndex].bytecode->GetBufferPointer();
D3DCHECK(d3d.device->CreateComputePipelineState(&desc, IID_PPV_ARGS(&volumeResources.unmanaged.probeVariabilityPSOs.reductionPSO)));
#ifdef GFX_NAME_OBJECTS
std::wstring name = L"DDGIVolume[" + std::to_wstring(volumeDesc.index) + L"], Probe Variability Reduction PSO";
volumeResources.unmanaged.probeVariabilityPSOs.reductionPSO->SetName(name.c_str());
#endif
shaderIndex++;
}
// Probe Variability Extra Reduction PSO
{
desc.CS.BytecodeLength = shaders[shaderIndex].bytecode->GetBufferSize();
desc.CS.pShaderBytecode = shaders[shaderIndex].bytecode->GetBufferPointer();
D3DCHECK(d3d.device->CreateComputePipelineState(&desc, IID_PPV_ARGS(&volumeResources.unmanaged.probeVariabilityPSOs.extraReductionPSO)));
#ifdef GFX_NAME_OBJECTS
std::wstring name = L"DDGIVolume[" + std::to_wstring(volumeDesc.index) + L"], Probe Variability Extra Reduction PSO";
volumeResources.unmanaged.probeVariabilityPSOs.extraReductionPSO->SetName(name.c_str());
#endif
}
}
log << "done.";
std::flush(log);
return true;
}
/**
* Release resources used by a DDGIVolume.
*/
void DestroyDDGIVolumeResources(Resources& resources, size_t volumeIndex)
{
// Get the volume
DDGIVolume* volume = static_cast<DDGIVolume*>(resources.volumes[volumeIndex]);
#if !RTXGI_DDGI_BINDLESS_RESOURCES
if (volume->GetRootSignature()) volume->GetRootSignature()->Release();
#endif
// Release textures
if (volume->GetProbeRayData()) volume->GetProbeRayData()->Release();
if (volume->GetProbeIrradiance()) volume->GetProbeIrradiance()->Release();
if (volume->GetProbeDistance()) volume->GetProbeDistance()->Release();
if (volume->GetProbeData()) volume->GetProbeData()->Release();
if (volume->GetProbeVariability()) volume->GetProbeVariability()->Release();
if (volume->GetProbeVariabilityAverage()) volume->GetProbeVariabilityAverage()->Release();
if (volume->GetProbeVariabilityReadback()) volume->GetProbeVariabilityReadback()->Release();
// Release PSOs
if (volume->GetProbeBlendingIrradiancePSO()) volume->GetProbeBlendingIrradiancePSO()->Release();
if (volume->GetProbeBlendingDistancePSO()) volume->GetProbeBlendingDistancePSO()->Release();
if (volume->GetProbeRelocationPSO()) volume->GetProbeRelocationPSO()->Release();
if (volume->GetProbeRelocationResetPSO()) volume->GetProbeRelocationResetPSO()->Release();
if (volume->GetProbeClassificationPSO()) volume->GetProbeClassificationPSO()->Release();
if (volume->GetProbeClassificationResetPSO()) volume->GetProbeClassificationResetPSO()->Release();
if (volume->GetProbeVariabilityReductionPSO()) volume->GetProbeVariabilityReductionPSO()->Release();
if (volume->GetProbeVariabilityExtraReductionPSO()) volume->GetProbeVariabilityExtraReductionPSO()->Release();
// Clear pointers
volume->Destroy();
}
#endif // !RTXGI_DDGI_RESOURCE_MANAGEMENT
//----------------------------------------------------------------------------------------------------------
// DDGIVolume Creation Helper Functions
//----------------------------------------------------------------------------------------------------------
/**
* Populates a DDGIVolumeDesc structure from configuration data.
*/
void GetDDGIVolumeDesc(const Configs::DDGIVolume& config, DDGIVolumeDesc& volumeDesc)
{
size_t size = config.name.size();
volumeDesc.name = new char[size + 1];
memset(volumeDesc.name, 0, size + 1);
memcpy(volumeDesc.name, config.name.c_str(), size);
volumeDesc.index = config.index;
volumeDesc.rngSeed = config.rngSeed;
volumeDesc.origin = { config.origin.x, config.origin.y, config.origin.z };
volumeDesc.eulerAngles = { config.eulerAngles.x, config.eulerAngles.y, config.eulerAngles.z, };
volumeDesc.probeSpacing = { config.probeSpacing.x, config.probeSpacing.y, config.probeSpacing.z };
volumeDesc.probeCounts = { config.probeCounts.x, config.probeCounts.y, config.probeCounts.z, };
volumeDesc.probeNumRays = config.probeNumRays;
volumeDesc.probeNumIrradianceTexels = config.probeNumIrradianceTexels;
volumeDesc.probeNumIrradianceInteriorTexels = (config.probeNumIrradianceTexels - 2);
volumeDesc.probeNumDistanceTexels = config.probeNumDistanceTexels;
volumeDesc.probeNumDistanceInteriorTexels = (config.probeNumDistanceTexels - 2);
volumeDesc.probeHysteresis = config.probeHysteresis;
volumeDesc.probeNormalBias = config.probeNormalBias;
volumeDesc.probeViewBias = config.probeViewBias;
volumeDesc.probeMaxRayDistance = config.probeMaxRayDistance;
volumeDesc.probeIrradianceThreshold = config.probeIrradianceThreshold;
volumeDesc.probeBrightnessThreshold = config.probeBrightnessThreshold;
volumeDesc.showProbes = config.showProbes;
volumeDesc.probeVisType = config.probeVisType;
volumeDesc.probeRayDataFormat = config.textureFormats.rayDataFormat;
volumeDesc.probeIrradianceFormat = config.textureFormats.irradianceFormat;
volumeDesc.probeDistanceFormat = config.textureFormats.distanceFormat;
volumeDesc.probeDataFormat = config.textureFormats.dataFormat;
volumeDesc.probeVariabilityFormat = config.textureFormats.variabilityFormat;
volumeDesc.probeRelocationEnabled = config.probeRelocationEnabled;
volumeDesc.probeMinFrontfaceDistance = config.probeMinFrontfaceDistance;
volumeDesc.probeClassificationEnabled = config.probeClassificationEnabled;
volumeDesc.probeVariabilityEnabled = config.probeVariabilityEnabled;
if (config.infiniteScrollingEnabled) volumeDesc.movementType = EDDGIVolumeMovementType::Scrolling;
else volumeDesc.movementType = EDDGIVolumeMovementType::Default;
}
/**
* Populates a DDGIVolumeResource structure.
* In unmanaged resource mode, the application creates DDGIVolume graphics resources in CreateDDGIVolumeResources().
* In managed resource mode, the RTXGI SDK creates DDGIVolume graphics resources.
*/
bool GetDDGIVolumeResources(
Globals& d3d,
GlobalResources& d3dResources,
Resources& resources,
const DDGIVolumeDesc& volumeDesc,
DDGIVolumeResources& volumeResources,
std::vector<Shaders::ShaderProgram>& volumeShaders,
std::ofstream& log)
{
std::string msg;
// Load and compile the volume's shaders
msg = "failed to compile shaders for DDGIVolume[" + std::to_string(volumeDesc.index) + "] (\"" + volumeDesc.name + "\")!\n";
CHECK(Graphics::DDGI::CompileDDGIVolumeShaders(d3d, volumeDesc, volumeShaders, false, log), msg.c_str(), log);
// Set the descriptor heap pointer and entry size
DDGIVolumeDescriptorHeapDesc& descHeap = volumeResources.descriptorHeap;
descHeap.resources = d3dResources.srvDescHeap;
#if RTXGI_DDGI_BINDLESS_RESOURCES
descHeap.samplers = d3dResources.samplerDescHeap;
#endif
descHeap.entrySize = d3dResources.srvDescHeapEntrySize;
// Set the volume's resource indices on the descriptor heap
descHeap.constantsIndex = DescriptorHeapOffsets::STB_DDGI_VOLUME_CONSTS;
descHeap.resourceIndicesIndex = DescriptorHeapOffsets::STB_DDGI_VOLUME_RESOURCE_INDICES;
descHeap.resourceIndices.rayDataUAVIndex = DescriptorHeapOffsets::UAV_DDGI_VOLUME_TEX2DARRAY + (volumeDesc.index * rtxgi::GetDDGIVolumeNumTex2DArrayDescriptors());
descHeap.resourceIndices.rayDataSRVIndex = DescriptorHeapOffsets::SRV_DDGI_VOLUME_TEX2DARRAY + (volumeDesc.index * rtxgi::GetDDGIVolumeNumTex2DArrayDescriptors());
descHeap.resourceIndices.probeIrradianceUAVIndex = DescriptorHeapOffsets::UAV_DDGI_VOLUME_TEX2DARRAY + (volumeDesc.index * rtxgi::GetDDGIVolumeNumTex2DArrayDescriptors()) + 1;
descHeap.resourceIndices.probeIrradianceSRVIndex = DescriptorHeapOffsets::SRV_DDGI_VOLUME_TEX2DARRAY + (volumeDesc.index * rtxgi::GetDDGIVolumeNumTex2DArrayDescriptors()) + 1;
descHeap.resourceIndices.probeDistanceUAVIndex = DescriptorHeapOffsets::UAV_DDGI_VOLUME_TEX2DARRAY + (volumeDesc.index * rtxgi::GetDDGIVolumeNumTex2DArrayDescriptors()) + 2;
descHeap.resourceIndices.probeDistanceSRVIndex = DescriptorHeapOffsets::SRV_DDGI_VOLUME_TEX2DARRAY + (volumeDesc.index * rtxgi::GetDDGIVolumeNumTex2DArrayDescriptors()) + 2;
descHeap.resourceIndices.probeDataUAVIndex = DescriptorHeapOffsets::UAV_DDGI_VOLUME_TEX2DARRAY + (volumeDesc.index * rtxgi::GetDDGIVolumeNumTex2DArrayDescriptors()) + 3;
descHeap.resourceIndices.probeDataSRVIndex = DescriptorHeapOffsets::SRV_DDGI_VOLUME_TEX2DARRAY + (volumeDesc.index * rtxgi::GetDDGIVolumeNumTex2DArrayDescriptors()) + 3;
descHeap.resourceIndices.probeVariabilityUAVIndex = DescriptorHeapOffsets::UAV_DDGI_VOLUME_TEX2DARRAY + (volumeDesc.index * rtxgi::GetDDGIVolumeNumTex2DArrayDescriptors()) + 4;
descHeap.resourceIndices.probeVariabilitySRVIndex = DescriptorHeapOffsets::SRV_DDGI_VOLUME_TEX2DARRAY + (volumeDesc.index * rtxgi::GetDDGIVolumeNumTex2DArrayDescriptors()) + 4;
descHeap.resourceIndices.probeVariabilityAverageUAVIndex = DescriptorHeapOffsets::UAV_DDGI_VOLUME_TEX2DARRAY + (volumeDesc.index * rtxgi::GetDDGIVolumeNumTex2DArrayDescriptors()) + 5;
descHeap.resourceIndices.probeVariabilityAverageSRVIndex = DescriptorHeapOffsets::SRV_DDGI_VOLUME_TEX2DARRAY + (volumeDesc.index * rtxgi::GetDDGIVolumeNumTex2DArrayDescriptors()) + 5;
// Set the volume constants structured buffer pointers and size
volumeResources.constantsBuffer = resources.volumeConstantsSTB;
volumeResources.constantsBufferUpload = resources.volumeConstantsSTBUpload;
volumeResources.constantsBufferSizeInBytes = resources.volumeConstantsSTBSizeInBytes;
// The Test Harness *always* accesses resources bindlessly when ray tracing, see RayTraceVolume().
// We store the bindless resource indices with the DDGIVolume so we can use the UploadDDGIVolumeResourceIndices() helper
// function to transfer the bindless indices to the GPU. SDK shaders ignore these values when not in bindless mode.
#if RTXGI_BINDLESS_TYPE == RTXGI_BINDLESS_TYPE_RESOURCE_ARRAYS
volumeResources.bindless.type = EBindlessType::RESOURCE_ARRAYS;
#elif RTXGI_BINDLESS_TYPE == RTXGI_BINDLESS_TYPE_DESCRIPTOR_HEAP
volumeResources.bindless.type = EBindlessType::DESCRIPTOR_HEAP;
#endif
// Regardless of what the host application chooses for resource binding, all SDK shaders can operate in either bound or bindless modes
volumeResources.bindless.enabled = (bool)RTXGI_DDGI_BINDLESS_RESOURCES;
// Set the resource indices structured buffer pointers and size
volumeResources.bindless.resourceIndicesBuffer = resources.volumeResourceIndicesSTB;
volumeResources.bindless.resourceIndicesBufferUpload = resources.volumeResourceIndicesSTBUpload;
volumeResources.bindless.resourceIndicesBufferSizeInBytes = resources.volumeResourceIndicesSTBSizeInBytes;
// Set the resource array indices of volume resources
DDGIVolumeResourceIndices& resourceIndices = volumeResources.bindless.resourceIndices;
resourceIndices.rayDataUAVIndex = (volumeDesc.index * rtxgi::GetDDGIVolumeNumTex2DArrayDescriptors());
resourceIndices.rayDataSRVIndex = (volumeDesc.index * rtxgi::GetDDGIVolumeNumTex2DArrayDescriptors());
resourceIndices.probeIrradianceUAVIndex = (volumeDesc.index * rtxgi::GetDDGIVolumeNumTex2DArrayDescriptors()) + 1;
resourceIndices.probeIrradianceSRVIndex = (volumeDesc.index * rtxgi::GetDDGIVolumeNumTex2DArrayDescriptors()) + 1;
resourceIndices.probeDistanceUAVIndex = (volumeDesc.index * rtxgi::GetDDGIVolumeNumTex2DArrayDescriptors()) + 2;
resourceIndices.probeDistanceSRVIndex = (volumeDesc.index * rtxgi::GetDDGIVolumeNumTex2DArrayDescriptors()) + 2;
resourceIndices.probeDataUAVIndex = (volumeDesc.index * rtxgi::GetDDGIVolumeNumTex2DArrayDescriptors()) + 3;
resourceIndices.probeDataSRVIndex = (volumeDesc.index * rtxgi::GetDDGIVolumeNumTex2DArrayDescriptors()) + 3;
resourceIndices.probeVariabilityUAVIndex = (volumeDesc.index * rtxgi::GetDDGIVolumeNumTex2DArrayDescriptors()) + 4;
resourceIndices.probeVariabilitySRVIndex = (volumeDesc.index * rtxgi::GetDDGIVolumeNumTex2DArrayDescriptors()) + 4;
resourceIndices.probeVariabilityAverageUAVIndex = (volumeDesc.index * rtxgi::GetDDGIVolumeNumTex2DArrayDescriptors()) + 5;
resourceIndices.probeVariabilityAverageSRVIndex = (volumeDesc.index * rtxgi::GetDDGIVolumeNumTex2DArrayDescriptors()) + 5;
#if RTXGI_DDGI_RESOURCE_MANAGEMENT
// Enable "Managed Mode", the RTXGI SDK creates graphics objects
volumeResources.managed.enabled = true;
// Pass the D3D device to use for resource creation
volumeResources.managed.device = d3d.device;
// Pass compiled shader bytecode
assert(volumeShaders.size() >= 2);
volumeResources.managed.probeBlendingIrradianceCS = { volumeShaders[0].bytecode->GetBufferPointer(), volumeShaders[0].bytecode->GetBufferSize() };
volumeResources.managed.probeBlendingDistanceCS = { volumeShaders[1].bytecode->GetBufferPointer(), volumeShaders[1].bytecode->GetBufferSize() };
assert(volumeShaders.size() >= 4);
volumeResources.managed.probeRelocation.updateCS = { volumeShaders[2].bytecode->GetBufferPointer(), volumeShaders[2].bytecode->GetBufferSize() };
volumeResources.managed.probeRelocation.resetCS = { volumeShaders[3].bytecode->GetBufferPointer(), volumeShaders[3].bytecode->GetBufferSize() };
assert(volumeShaders.size() >= 6);
volumeResources.managed.probeClassification.updateCS = { volumeShaders[4].bytecode->GetBufferPointer(), volumeShaders[4].bytecode->GetBufferSize() };
volumeResources.managed.probeClassification.resetCS = { volumeShaders[5].bytecode->GetBufferPointer(), volumeShaders[5].bytecode->GetBufferSize() };
assert(volumeShaders.size() == 8);
volumeResources.managed.probeVariability.reductionCS = { volumeShaders[6].bytecode->GetBufferPointer(), volumeShaders[6].bytecode->GetBufferSize() };
volumeResources.managed.probeVariability.extraReductionCS = { volumeShaders[7].bytecode->GetBufferPointer(), volumeShaders[7].bytecode->GetBufferSize() };
#else
// Enable "Unmanaged Mode", the application creates graphics objects
volumeResources.unmanaged.enabled = true;
#if RTXGI_DDGI_BINDLESS_RESOURCES
// Root parameter slot locations in the application's root signature
// See Direct3D12.cpp::CreateGlobalRootSignature()
volumeResources.unmanaged.rootParamSlotRootConstants = 1;
volumeResources.unmanaged.rootParamSlotSamplerDescriptorTable = 2;
volumeResources.unmanaged.rootParamSlotResourceDescriptorTable = 3;
#else
// Root parameter slot locations in the RTXGI DDGIVolume root signature
// See DDGIVolume_D3D12.cpp::GetDDGIVolumeRootSignatureDesc()
volumeResources.unmanaged.rootParamSlotRootConstants = 0;
volumeResources.unmanaged.rootParamSlotResourceDescriptorTable = 1;
#endif
// Create the volume's resources
msg = "failed to create resources for DDGIVolume[" + std::to_string(volumeDesc.index) + "] (\"" + volumeDesc.name + "\")!\n";
CHECK(CreateDDGIVolumeResources(d3d, d3dResources, resources, volumeDesc, volumeResources, volumeShaders, log), msg.c_str(), log);
#endif
return true;
}
/**
* Create a DDGIVolume.
*/
bool CreateDDGIVolume(
Globals& d3d,
GlobalResources& d3dResources,
Resources& resources,
const Configs::DDGIVolume& volumeConfig,
std::ofstream& log)
{
// Destroy the volume if one already exists at the given index
if (volumeConfig.index < static_cast<UINT>(resources.volumes.size()))
{
if (resources.volumes[volumeConfig.index])
{
#if RTXGI_DDGI_RESOURCE_MANAGEMENT
resources.volumes[volumeConfig.index]->Destroy();
#else
DestroyDDGIVolumeResources(resources, volumeConfig.index);
#endif
SAFE_DELETE(resources.volumeDescs[volumeConfig.index].name);
SAFE_DELETE(resources.volumes[volumeConfig.index]);
resources.numVolumeVariabilitySamples[volumeConfig.index] = 0;
}
}
else
{
resources.volumeDescs.emplace_back();
resources.volumes.emplace_back();
resources.numVolumeVariabilitySamples.emplace_back();
}
// Describe the DDGIVolume's properties
DDGIVolumeDesc& volumeDesc = resources.volumeDescs[volumeConfig.index];
GetDDGIVolumeDesc(volumeConfig, volumeDesc);
// Describe the DDGIVolume's resources and shaders
DDGIVolumeResources volumeResources;
std::vector<Shaders::ShaderProgram> volumeShaders;
GetDDGIVolumeResources(d3d, d3dResources, resources, volumeDesc, volumeResources, volumeShaders, log);
// Create a new DDGIVolume
DDGIVolume* volume = new DDGIVolume();
ERTXGIStatus status = volume->Create(volumeDesc, volumeResources);
if (status != ERTXGIStatus::OK)
{
log << "\nError: failed to create the DDGIVolume!";
std::flush(log);
return false;
}
// Store the volume's pointer
resources.volumes[volumeConfig.index] = volume;
// Release the volume's shader bytecode
for (size_t shaderIndex = 0; shaderIndex < volumeShaders.size(); shaderIndex++)
{
volumeShaders[shaderIndex].Release();
}
volumeShaders.clear();
return true;
}
/**
* Creates the RTV descriptor heap for all DDGIVolumes.
*/
bool CreateRTVDescriptorHeap(Globals& d3d, Resources& resources, UINT volumeCount)
{
// Describe the RTV heap
D3D12_DESCRIPTOR_HEAP_DESC heapDesc = {};
heapDesc.NumDescriptors = volumeCount * GetDDGIVolumeNumRTVDescriptors();
heapDesc.Type = D3D12_DESCRIPTOR_HEAP_TYPE_RTV;
heapDesc.Flags = D3D12_DESCRIPTOR_HEAP_FLAG_NONE;
// Create the RTV heap
HRESULT hr = d3d.device->CreateDescriptorHeap(&heapDesc, IID_PPV_ARGS(&resources.rtvDescriptorHeap));
if (FAILED(hr)) return false;
#ifdef RTXGI_GFX_NAME_OBJECTS
resources.rtvDescriptorHeap->SetName(L"DDGI RTV Descriptor Heap");
#endif
return true;
}
/**
* Creates the DDGIVolume resource indices structured buffer.
*/
bool CreateDDGIVolumeResourceIndicesBuffer(Globals& d3d, GlobalResources& d3dResources, Resources& resources, UINT volumeCount, std::ofstream& log)
{
resources.volumeResourceIndicesSTBSizeInBytes = sizeof(DDGIVolumeResourceIndices) * volumeCount;
if (resources.volumeResourceIndicesSTBSizeInBytes == 0) return true; // scenes with no DDGIVolumes are valid
// Create the DDGIVolume resource indices upload buffer resource (double buffered)
BufferDesc desc = { 2 * resources.volumeResourceIndicesSTBSizeInBytes, 0, EHeapType::UPLOAD, D3D12_RESOURCE_STATE_GENERIC_READ, D3D12_RESOURCE_FLAG_NONE };
CHECK(CreateBuffer(d3d, desc, &resources.volumeResourceIndicesSTBUpload), "create DDGIVolume resource indices upload structured buffer!\n", log);
#ifdef GFX_NAME_OBJECTS
resources.volumeResourceIndicesSTBUpload->SetName(L"DDGIVolume Resource Indices Upload Structured Buffer");
#endif
// Create the DDGIVolume resource indices device buffer resource
desc = { resources.volumeResourceIndicesSTBSizeInBytes, 0, EHeapType::DEFAULT, D3D12_RESOURCE_STATE_COMMON, D3D12_RESOURCE_FLAG_NONE };
CHECK(CreateBuffer(d3d, desc, &resources.volumeResourceIndicesSTB), "create DDGIVolume resource indices structured buffer!\n", log);
#ifdef GFX_NAME_OBJECTS
resources.volumeResourceIndicesSTB->SetName(L"DDGIVolume Resource Indices Structured Buffer");
#endif
// Add the resource indices structured buffer SRV to the descriptor heap
D3D12_SHADER_RESOURCE_VIEW_DESC srvDesc = {};
srvDesc.Format = DXGI_FORMAT_UNKNOWN;
srvDesc.ViewDimension = D3D12_SRV_DIMENSION_BUFFER;
srvDesc.Buffer.NumElements = volumeCount;
srvDesc.Buffer.StructureByteStride = sizeof(DDGIVolumeResourceIndices);
srvDesc.Shader4ComponentMapping = D3D12_DEFAULT_SHADER_4_COMPONENT_MAPPING;
D3D12_CPU_DESCRIPTOR_HANDLE handle;
handle.ptr = d3dResources.srvDescHeapStart.ptr + (DescriptorHeapOffsets::STB_DDGI_VOLUME_RESOURCE_INDICES * d3dResources.srvDescHeapEntrySize);
d3d.device->CreateShaderResourceView(resources.volumeResourceIndicesSTB, &srvDesc, handle);
return true;
}
/**
* Creates the DDGIVolume constants structured buffer.
*/
bool CreateDDGIVolumeConstantsBuffer(Globals& d3d, GlobalResources& d3dResources, Resources& resources, UINT volumeCount, std::ofstream& log)
{
resources.volumeConstantsSTBSizeInBytes = sizeof(DDGIVolumeDescGPUPacked) * volumeCount;
if (resources.volumeConstantsSTBSizeInBytes == 0) return true; // scenes with no DDGIVolumes are valid
// Create the DDGIVolume constants upload buffer resource (double buffered)
BufferDesc desc = { 2 * resources.volumeConstantsSTBSizeInBytes, 0, EHeapType::UPLOAD, D3D12_RESOURCE_STATE_GENERIC_READ, D3D12_RESOURCE_FLAG_NONE };
CHECK(CreateBuffer(d3d, desc, &resources.volumeConstantsSTBUpload), "create DDGIVolume constants upload structured buffer!\n", log);
#ifdef GFX_NAME_OBJECTS
resources.volumeConstantsSTBUpload->SetName(L"DDGIVolume Constants Upload Structured Buffer");
#endif
// Create the DDGIVolume constants device buffer resource
desc = { resources.volumeConstantsSTBSizeInBytes, 0, EHeapType::DEFAULT, D3D12_RESOURCE_STATE_COMMON, D3D12_RESOURCE_FLAG_NONE };
CHECK(CreateBuffer(d3d, desc, &resources.volumeConstantsSTB), "create DDGIVolume constants structured buffer!\n", log);
#ifdef GFX_NAME_OBJECTS
resources.volumeConstantsSTB->SetName(L"DDGIVolume Constants Structured Buffer");
#endif
#if !RTXGI_DDGI_RESOURCE_MANAGEMENT
// Add the constants structured buffer SRV to the descriptor heap
D3D12_SHADER_RESOURCE_VIEW_DESC srvDesc = {};
srvDesc.Format = DXGI_FORMAT_UNKNOWN;
srvDesc.ViewDimension = D3D12_SRV_DIMENSION_BUFFER;
srvDesc.Buffer.NumElements = volumeCount;
srvDesc.Buffer.StructureByteStride = sizeof(DDGIVolumeDescGPUPacked);
srvDesc.Shader4ComponentMapping = D3D12_DEFAULT_SHADER_4_COMPONENT_MAPPING;
D3D12_CPU_DESCRIPTOR_HANDLE handle;
handle.ptr = d3dResources.srvDescHeapStart.ptr + (DescriptorHeapOffsets::STB_DDGI_VOLUME_CONSTS * d3dResources.srvDescHeapEntrySize);
d3d.device->CreateShaderResourceView(resources.volumeConstantsSTB, &srvDesc, handle);
#endif
return true;
}
//----------------------------------------------------------------------------------------------------------
// Private Functions
//----------------------------------------------------------------------------------------------------------
bool CreateTextures(Globals& d3d, GlobalResources& d3dResources, Resources& resources, std::ofstream& log)
{
SAFE_RELEASE(resources.output);
// Create the output (R16G16B16A16_FLOAT) texture resource
TextureDesc desc = { static_cast<uint32_t>(d3d.width), static_cast<uint32_t>(d3d.height), 1, 1, DXGI_FORMAT_R16G16B16A16_FLOAT, D3D12_RESOURCE_STATE_UNORDERED_ACCESS, D3D12_RESOURCE_FLAG_ALLOW_UNORDERED_ACCESS };
CHECK(CreateTexture(d3d, desc, &resources.output), "create DDGI output texture resource!\n", log);
#ifdef GFX_NAME_OBJECTS
resources.output->SetName(L"DDGI Output");
#endif
// Add the DDGIOutput texture UAV to the descriptor heap
D3D12_UNORDERED_ACCESS_VIEW_DESC uavDesc = {};
uavDesc.ViewDimension = D3D12_UAV_DIMENSION_TEXTURE2D;
uavDesc.Format = desc.format;
D3D12_CPU_DESCRIPTOR_HANDLE handle;
handle.ptr = d3dResources.srvDescHeapStart.ptr + (DescriptorHeapOffsets::UAV_DDGI_OUTPUT * d3dResources.srvDescHeapEntrySize);
d3d.device->CreateUnorderedAccessView(resources.output, nullptr, &uavDesc, handle);
return true;
}
bool LoadAndCompileShaders(Globals& d3d, Resources& resources, UINT numVolumes, std::ofstream& log)
{
// Release existing shaders
resources.rtShaders.Release();
resources.indirectCS.Release();
std::wstring root = std::wstring(d3d.shaderCompiler.root.begin(), d3d.shaderCompiler.root.end());
// Load and compile the ray generation shader
{
resources.rtShaders.rgs.filepath = root + L"shaders/ddgi/ProbeTraceRGS.hlsl";
resources.rtShaders.rgs.entryPoint = L"RayGen";
resources.rtShaders.rgs.exportName = L"DDGIProbeTraceRGS";
Shaders::AddDefine(resources.rtShaders.rgs, L"GFX_NVAPI", std::to_wstring(GFX_NVAPI));
Shaders::AddDefine(resources.rtShaders.rgs, L"CONSTS_REGISTER", L"b0"); // for DDGIRootConstants, see Direct3D12.cpp::CreateGlobalRootSignature(...)
Shaders::AddDefine(resources.rtShaders.rgs, L"CONSTS_SPACE", L"space1"); // for DDGIRootConstants, see Direct3D12.cpp::CreateGlobalRootSignature(...)
Shaders::AddDefine(resources.rtShaders.rgs, L"RTXGI_BINDLESS_TYPE", std::to_wstring(RTXGI_BINDLESS_TYPE));
Shaders::AddDefine(resources.rtShaders.rgs, L"RTXGI_COORDINATE_SYSTEM", std::to_wstring(RTXGI_COORDINATE_SYSTEM));
CHECK(Shaders::Compile(d3d.shaderCompiler, resources.rtShaders.rgs), "compile DDGI probe tracing ray generation shader!\n", log);
}
// Load and compile the miss shader
{
resources.rtShaders.miss.filepath = root + L"shaders/Miss.hlsl";
resources.rtShaders.miss.entryPoint = L"Miss";
resources.rtShaders.miss.exportName = L"DDGIProbeTraceMiss";
Shaders::AddDefine(resources.rtShaders.miss, L"RTXGI_BINDLESS_TYPE", std::to_wstring(RTXGI_BINDLESS_TYPE));
CHECK(Shaders::Compile(d3d.shaderCompiler, resources.rtShaders.miss), "compile DDGI probe tracing miss shader!\n", log);
}
// Add the hit group
{
resources.rtShaders.hitGroups.emplace_back();
Shaders::ShaderRTHitGroup& group = resources.rtShaders.hitGroups[0];
group.exportName = L"DDGIProbeTraceHitGroup";
// Load and compile the CHS
group.chs.filepath = root + L"shaders/CHS.hlsl";
group.chs.entryPoint = L"CHS_GI";
group.chs.exportName = L"DDGIProbeTraceCHS";
Shaders::AddDefine(group.chs, L"RTXGI_BINDLESS_TYPE", std::to_wstring(RTXGI_BINDLESS_TYPE));
CHECK(Shaders::Compile(d3d.shaderCompiler, group.chs), "compile DDGI probe tracing closest hit shader!\n", log);
// Load and compile the AHS
group.ahs.filepath = root + L"shaders/AHS.hlsl";
group.ahs.entryPoint = L"AHS_GI";
group.ahs.exportName = L"DDGIProbeTraceAHS";
Shaders::AddDefine(group.ahs, L"RTXGI_BINDLESS_TYPE", std::to_wstring(RTXGI_BINDLESS_TYPE));
CHECK(Shaders::Compile(d3d.shaderCompiler, group.ahs), "compile DDGI probe tracing any hit shader!\n", log);
// Set the payload size
resources.rtShaders.payloadSizeInBytes = sizeof(PackedPayload);
}
// Load and compile the indirect lighting compute shader
{
std::wstring shaderPath = root + L"shaders/IndirectCS.hlsl";
resources.indirectCS.filepath = shaderPath.c_str();
resources.indirectCS.entryPoint = L"CS";
resources.indirectCS.targetProfile = L"cs_6_6";
Shaders::AddDefine(resources.indirectCS, L"CONSTS_REGISTER", L"b0"); // for DDGIRootConstants, see Direct3D12.cpp::CreateGlobalRootSignature(...)
Shaders::AddDefine(resources.indirectCS, L"CONSTS_SPACE", L"space1"); // for DDGIRootConstants, see Direct3D12.cpp::CreateGlobalRootSignature(...)
Shaders::AddDefine(resources.indirectCS, L"RTXGI_BINDLESS_TYPE", std::to_wstring(RTXGI_BINDLESS_TYPE));
Shaders::AddDefine(resources.indirectCS, L"RTXGI_COORDINATE_SYSTEM", std::to_wstring(RTXGI_COORDINATE_SYSTEM));
Shaders::AddDefine(resources.indirectCS, L"RTXGI_DDGI_NUM_VOLUMES", std::to_wstring(numVolumes));
Shaders::AddDefine(resources.indirectCS, L"THGP_DIM_X", L"8");
Shaders::AddDefine(resources.indirectCS, L"THGP_DIM_Y", L"4");
CHECK(Shaders::Compile(d3d.shaderCompiler, resources.indirectCS), "compile indirect lighting compute shader!\n", log);
}
return true;
}
bool CreatePSOs(Globals& d3d, GlobalResources& d3dResources, Resources& resources, std::ofstream& log)
{
// Release existing PSOs
SAFE_RELEASE(resources.rtpso);
SAFE_RELEASE(resources.rtpsoInfo);
SAFE_RELEASE(resources.indirectPSO);
// Create the RTPSO
CHECK(CreateRayTracingPSO(
d3d.device,
d3dResources.rootSignature,
resources.rtShaders,
&resources.rtpso,
&resources.rtpsoInfo),
"create DDGI RTPSO!\n", log);
#ifdef GFX_NAME_OBJECTS
resources.rtpso->SetName(L"DDGI RTPSO");
#endif
CHECK(CreateComputePSO(
d3d.device,
d3dResources.rootSignature,
resources.indirectCS,
&resources.indirectPSO),
"create indirect lighting PSO!\n", log);
#ifdef GFX_NAME_OBJECTS
resources.indirectPSO->SetName(L"Indirect Lighting (DDGI) PSO");
#endif
return true;
}
bool CreateShaderTable(Globals& d3d, GlobalResources& d3dResources, Resources& resources, std::ofstream& log)
{
// The Shader Table layout is as follows:
// Entry 0: DDGI Ray Generation Shader
// Entry 1: DDGI Miss Shader
// Entry 2+: DDGI HitGroups
// All shader records in the Shader Table must have the same size, so shader record size will be based on the largest required entry.
// The entries must be aligned up to D3D12_RAYTRACING_SHADER_BINDING_TABLE_RECORD_BYTE_ALIGNMENT.
// The CHS requires the largest entry:
// 32 bytes for the shader identifier
// + 8 bytes for descriptor table VA
// + 8 bytes for sampler descriptor table VA
// = 48 bytes ->> aligns to 64 bytes
// Release the existing shader table
resources.shaderTableSize = 0;
SAFE_RELEASE(resources.shaderTable);
uint32_t shaderIdSize = D3D12_RAYTRACING_SHADER_RECORD_BYTE_ALIGNMENT;
resources.shaderTableRecordSize = shaderIdSize;
resources.shaderTableRecordSize += 8; // descriptor table GPUVA
resources.shaderTableRecordSize += 8; // sampler descriptor table GPUVA
resources.shaderTableRecordSize = ALIGN(D3D12_RAYTRACING_SHADER_RECORD_BYTE_ALIGNMENT, resources.shaderTableRecordSize);
// 2 + numHitGroups shader records in the table
resources.shaderTableSize = (2 + static_cast<uint32_t>(resources.rtShaders.hitGroups.size())) * resources.shaderTableRecordSize;
resources.shaderTableSize = ALIGN(D3D12_RAYTRACING_SHADER_TABLE_BYTE_ALIGNMENT, resources.shaderTableSize);
// Create the shader table upload buffer resource
BufferDesc desc = { resources.shaderTableSize, 0, EHeapType::UPLOAD, D3D12_RESOURCE_STATE_GENERIC_READ, D3D12_RESOURCE_FLAG_NONE };
CHECK(CreateBuffer(d3d, desc, &resources.shaderTableUpload), "create DDGI shader table upload buffer!", log);
#ifdef GFX_NAME_OBJECTS
resources.shaderTableUpload->SetName(L"DDGI Shader Table Upload");
#endif
// Create the shader table buffer resource
desc = { resources.shaderTableSize, 0, EHeapType::DEFAULT, D3D12_RESOURCE_STATE_COMMON, D3D12_RESOURCE_FLAG_NONE };
CHECK(CreateBuffer(d3d, desc, &resources.shaderTable), "create DDGI shader table!", log);
#ifdef GFX_NAME_OBJECTS
resources.shaderTable->SetName(L"DDGI Shader Table");
#endif
return true;
}
bool UpdateShaderTable(Globals& d3d, GlobalResources& d3dResources, Resources& resources, std::ofstream& log)
{
uint32_t shaderIdSize = D3D12_RAYTRACING_SHADER_RECORD_BYTE_ALIGNMENT;
// Write shader table records
uint8_t* pData = nullptr;
D3D12_RANGE readRange = {};
if (FAILED(resources.shaderTableUpload->Map(0, &readRange, reinterpret_cast<void**>(&pData)))) return false;
// Entry 0: Ray Generation Shader and descriptor heap pointer
memcpy(pData, resources.rtpsoInfo->GetShaderIdentifier(resources.rtShaders.rgs.exportName.c_str()), shaderIdSize);
*reinterpret_cast<D3D12_GPU_DESCRIPTOR_HANDLE*>(pData + shaderIdSize) = d3dResources.srvDescHeap->GetGPUDescriptorHandleForHeapStart();
resources.shaderTableRGSStartAddress = resources.shaderTable->GetGPUVirtualAddress();
// Entry 1: Miss Shader
pData += resources.shaderTableRecordSize;
memcpy(pData, resources.rtpsoInfo->GetShaderIdentifier(resources.rtShaders.miss.exportName.c_str()), shaderIdSize);
resources.shaderTableMissTableStartAddress = resources.shaderTableRGSStartAddress + resources.shaderTableRecordSize;
resources.shaderTableMissTableSize = resources.shaderTableRecordSize;
// Entries 2+: Hit Groups and descriptor heap pointers
for (uint32_t hitGroupIndex = 0; hitGroupIndex < static_cast<uint32_t>(resources.rtShaders.hitGroups.size()); hitGroupIndex++)
{
pData += resources.shaderTableRecordSize;
memcpy(pData, resources.rtpsoInfo->GetShaderIdentifier(resources.rtShaders.hitGroups[hitGroupIndex].exportName), shaderIdSize);
*reinterpret_cast<D3D12_GPU_DESCRIPTOR_HANDLE*>(pData + shaderIdSize) = d3dResources.srvDescHeap->GetGPUDescriptorHandleForHeapStart();
*reinterpret_cast<D3D12_GPU_DESCRIPTOR_HANDLE*>(pData + shaderIdSize + 8) = d3dResources.samplerDescHeap->GetGPUDescriptorHandleForHeapStart();
}
resources.shaderTableHitGroupTableStartAddress = resources.shaderTableMissTableStartAddress + resources.shaderTableMissTableSize;
resources.shaderTableHitGroupTableSize = static_cast<uint32_t>(resources.rtShaders.hitGroups.size()) * resources.shaderTableRecordSize;
// Unmap
resources.shaderTableUpload->Unmap(0, nullptr);
// Schedule a copy of the upload buffer to the device buffer
d3d.cmdList[d3d.frameIndex]->CopyBufferRegion(resources.shaderTable, 0, resources.shaderTableUpload, 0, resources.shaderTableSize);
// Transition the default heap resource to generic read after the copy is complete
D3D12_RESOURCE_BARRIER barrier = {};
barrier.Type = D3D12_RESOURCE_BARRIER_TYPE_TRANSITION;
barrier.Transition.pResource = resources.shaderTable;
barrier.Transition.StateBefore = D3D12_RESOURCE_STATE_COPY_DEST;
barrier.Transition.StateAfter = D3D12_RESOURCE_STATE_GENERIC_READ;
barrier.Transition.Subresource = D3D12_RESOURCE_BARRIER_ALL_SUBRESOURCES;
d3d.cmdList[d3d.frameIndex]->ResourceBarrier(1, &barrier);
return true;
}
void RayTraceVolumes(Globals& d3d, GlobalResources& d3dResources, Resources& resources)
{
#ifdef GFX_PERF_MARKERS
PIXBeginEvent(d3d.cmdList[d3d.frameIndex], PIX_COLOR(GFX_PERF_MARKER_GREEN), "Ray Trace DDGIVolumes");
#endif
// Set the descriptor heaps
ID3D12DescriptorHeap* ppHeaps[] = { d3dResources.srvDescHeap, d3dResources.samplerDescHeap };
d3d.cmdList[d3d.frameIndex]->SetDescriptorHeaps(_countof(ppHeaps), ppHeaps);
// Set the root signature
d3d.cmdList[d3d.frameIndex]->SetComputeRootSignature(d3dResources.rootSignature);
// Update the root constants
UINT offset = 0;
GlobalConstants consts = d3dResources.constants;
d3d.cmdList[d3d.frameIndex]->SetComputeRoot32BitConstants(0, AppConsts::GetNum32BitValues(), consts.app.GetData(), offset);
offset += AppConsts::GetAlignedNum32BitValues();
d3d.cmdList[d3d.frameIndex]->SetComputeRoot32BitConstants(0, PathTraceConsts::GetNum32BitValues(), consts.pt.GetData(), offset);
offset += PathTraceConsts::GetAlignedNum32BitValues();
d3d.cmdList[d3d.frameIndex]->SetComputeRoot32BitConstants(0, LightingConsts::GetNum32BitValues(), consts.lights.GetData(), offset);
// Set the root parameter descriptor tables