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/*
* Copyright 2019-2021 Diligent Graphics LLC
* Copyright 2015-2019 Egor Yusov
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* In no event and under no legal theory, whether in tort (including negligence),
* contract, or otherwise, unless required by applicable law (such as deliberate
* and grossly negligent acts) or agreed to in writing, shall any Contributor be
* liable for any damages, including any direct, indirect, special, incidental,
* or consequential damages of any character arising as a result of this License or
* out of the use or inability to use the software (including but not limited to damages
* for loss of goodwill, work stoppage, computer failure or malfunction, or any and
* all other commercial damages or losses), even if such Contributor has been advised
* of the possibility of such damages.
*/
#include "pch.h"
#include "TopLevelASD3D12Impl.hpp"
#include "RenderDeviceD3D12Impl.hpp"
#include "D3D12TypeConversions.hpp"
#include "GraphicsAccessories.hpp"
#include "DXGITypeConversions.hpp"
#include "StringTools.hpp"
namespace Diligent
{
TopLevelASD3D12Impl::TopLevelASD3D12Impl(IReferenceCounters* pRefCounters,
RenderDeviceD3D12Impl* pDeviceD3D12,
const TopLevelASDesc& Desc) :
TTopLevelASBase{pRefCounters, pDeviceD3D12, Desc}
{
auto* const pd3d12Device = pDeviceD3D12->GetD3D12Device5();
const auto& Limits = pDeviceD3D12->GetProperties();
UINT64 ResultDataMaxSizeInBytes = 0;
if (m_Desc.CompactedSize > 0)
{
ResultDataMaxSizeInBytes = m_Desc.CompactedSize;
}
else
{
D3D12_RAYTRACING_ACCELERATION_STRUCTURE_PREBUILD_INFO d3d12TopLevelPrebuildInfo = {};
D3D12_BUILD_RAYTRACING_ACCELERATION_STRUCTURE_INPUTS d3d12TopLevelInputs = {};
d3d12TopLevelInputs.Type = D3D12_RAYTRACING_ACCELERATION_STRUCTURE_TYPE_TOP_LEVEL;
d3d12TopLevelInputs.Flags = BuildASFlagsToD3D12ASBuildFlags(m_Desc.Flags);
d3d12TopLevelInputs.DescsLayout = D3D12_ELEMENTS_LAYOUT_ARRAY;
d3d12TopLevelInputs.NumDescs = m_Desc.MaxInstanceCount;
DEV_CHECK_ERR(m_Desc.MaxInstanceCount <= Limits.MaxInstancesPerTLAS,
"Max instance count (", m_Desc.MaxInstanceCount, ") exceeds device limit (", Limits.MaxInstancesPerTLAS, ").");
pd3d12Device->GetRaytracingAccelerationStructurePrebuildInfo(&d3d12TopLevelInputs, &d3d12TopLevelPrebuildInfo);
if (d3d12TopLevelPrebuildInfo.ResultDataMaxSizeInBytes == 0)
LOG_ERROR_AND_THROW("Failed to get ray tracing acceleration structure prebuild info.");
ResultDataMaxSizeInBytes = d3d12TopLevelPrebuildInfo.ResultDataMaxSizeInBytes;
m_ScratchSize.Build = static_cast<Uint32>(d3d12TopLevelPrebuildInfo.ScratchDataSizeInBytes);
m_ScratchSize.Update = static_cast<Uint32>(d3d12TopLevelPrebuildInfo.UpdateScratchDataSizeInBytes);
}
D3D12_HEAP_PROPERTIES HeapProps{};
HeapProps.Type = D3D12_HEAP_TYPE_DEFAULT;
HeapProps.CPUPageProperty = D3D12_CPU_PAGE_PROPERTY_UNKNOWN;
HeapProps.MemoryPoolPreference = D3D12_MEMORY_POOL_UNKNOWN;
HeapProps.CreationNodeMask = 1;
HeapProps.VisibleNodeMask = 1;
D3D12_RESOURCE_DESC d3d12ASDesc{};
d3d12ASDesc.Dimension = D3D12_RESOURCE_DIMENSION_BUFFER;
d3d12ASDesc.Alignment = 0;
d3d12ASDesc.Width = ResultDataMaxSizeInBytes;
d3d12ASDesc.Height = 1;
d3d12ASDesc.DepthOrArraySize = 1;
d3d12ASDesc.MipLevels = 1;
d3d12ASDesc.Format = DXGI_FORMAT_UNKNOWN;
d3d12ASDesc.SampleDesc.Count = 1;
d3d12ASDesc.SampleDesc.Quality = 0;
d3d12ASDesc.Layout = D3D12_TEXTURE_LAYOUT_ROW_MAJOR;
d3d12ASDesc.Flags = D3D12_RESOURCE_FLAG_ALLOW_UNORDERED_ACCESS;
auto hr = pd3d12Device->CreateCommittedResource(&HeapProps, D3D12_HEAP_FLAG_NONE,
&d3d12ASDesc, D3D12_RESOURCE_STATE_RAYTRACING_ACCELERATION_STRUCTURE, nullptr,
__uuidof(m_pd3d12Resource),
reinterpret_cast<void**>(static_cast<ID3D12Resource**>(&m_pd3d12Resource)));
if (FAILED(hr))
LOG_ERROR_AND_THROW("Failed to create D3D12 Top-level acceleration structure");
if (*m_Desc.Name != 0)
m_pd3d12Resource->SetName(WidenString(m_Desc.Name).c_str());
m_DescriptorHandle = pDeviceD3D12->AllocateDescriptors(D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV);
D3D12_SHADER_RESOURCE_VIEW_DESC d3d12SRVDesc{};
d3d12SRVDesc.ViewDimension = D3D12_SRV_DIMENSION_RAYTRACING_ACCELERATION_STRUCTURE;
d3d12SRVDesc.Shader4ComponentMapping = D3D12_DEFAULT_SHADER_4_COMPONENT_MAPPING;
d3d12SRVDesc.Format = DXGI_FORMAT_UNKNOWN;
d3d12SRVDesc.RaytracingAccelerationStructure.Location = GetGPUAddress();
pd3d12Device->CreateShaderResourceView(nullptr, &d3d12SRVDesc, m_DescriptorHandle.GetCpuHandle());
DEV_CHECK_ERR(GetGPUAddress() % D3D12_RAYTRACING_ACCELERATION_STRUCTURE_BYTE_ALIGNMENT == 0, "GPU virtual address is expected to be at least 256-byte aligned");
SetState(RESOURCE_STATE_BUILD_AS_READ);
}
TopLevelASD3D12Impl::TopLevelASD3D12Impl(IReferenceCounters* pRefCounters,
class RenderDeviceD3D12Impl* pDeviceD3D12,
const TopLevelASDesc& Desc,
RESOURCE_STATE InitialState,
ID3D12Resource* pd3d12TLAS) :
TTopLevelASBase{pRefCounters, pDeviceD3D12, Desc}
{
m_pd3d12Resource = pd3d12TLAS;
SetState(InitialState);
}
TopLevelASD3D12Impl::~TopLevelASD3D12Impl()
{
// D3D12 object can only be destroyed when it is no longer used by the GPU
GetDevice()->SafeReleaseDeviceObject(std::move(m_pd3d12Resource), m_Desc.CommandQueueMask);
}
} // namespace Diligent
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