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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.
*/
#pragma once
/// \file
/// Declaration of Diligent::RootSignatureD3D12 class
// Root signature object combines multiple pipeline resource signatures into a single
// d3d12 root signature. The signatures "stack" on top of each other. Their "local"
// root indices and register spaces are biased by the root indices and spaces of
// previous signatures.
//
// __________________________________________________________
// | |
// | Pipeline Resource Signature 2 (NRootIndices2, NSpaces2) | BaseRootIndex2 = BaseRootIndex1 + NRootIndices1
// |__________________________________________________________| BaseSpace2 = BaseSpace1 + NSpaces1
// | |
// | Pipeline Resource Signature 1 (NRootIndices1, NSpaces1) | BaseRootIndex1 = BaseRootIndex0 + NRootIndices0
// |__________________________________________________________| BaseSpace1 = BaseSpace0 + NSpaces0
// | |
// | Pipeline Resource Signature 0 (NRootIndices0, NSpaces0) | BaseRootIndex0 = 0
// |__________________________________________________________| BaseSpace0 = 0
//
#include <mutex>
#include <unordered_map>
#include <memory>
#include "PrivateConstants.h"
#include "ShaderResources.hpp"
#include "ObjectBase.hpp"
#include "ResourceBindingMap.hpp"
namespace Diligent
{
class RenderDeviceD3D12Impl;
class RootSignatureCacheD3D12;
class PipelineResourceSignatureD3D12Impl;
/// Implementation of the Diligent::RootSignature class
class RootSignatureD3D12 final : public ObjectBase<IObject>
{
public:
RootSignatureD3D12(IReferenceCounters* pRefCounters,
RenderDeviceD3D12Impl* pDeviceD3D12Impl,
const RefCntAutoPtr<PipelineResourceSignatureD3D12Impl> ppSignatures[],
Uint32 SignatureCount,
size_t Hash);
~RootSignatureD3D12();
size_t GetHash() const { return m_Hash; }
Uint32 GetSignatureCount() const { return m_SignatureCount; }
PipelineResourceSignatureD3D12Impl* GetResourceSignature(Uint32 index) const
{
VERIFY_EXPR(index < m_SignatureCount);
return m_ResourceSignatures[index].pSignature;
}
ID3D12RootSignature* GetD3D12RootSignature() const
{
VERIFY_EXPR(m_pd3d12RootSignature);
return m_pd3d12RootSignature;
}
Uint32 GetBaseRootIndex(Uint32 BindingIndex) const
{
VERIFY_EXPR(BindingIndex < m_SignatureCount);
return m_ResourceSignatures[BindingIndex].BaseRootIndex;
}
Uint32 GetBaseRegisterSpace(Uint32 BindingIndex) const
{
VERIFY_EXPR(BindingIndex <= m_SignatureCount);
return m_ResourceSignatures[BindingIndex].BaseRegisterSpace;
}
/// Returns the total number of register spaces used by all resource signatures
Uint32 GetTotalSpaces() const
{
return m_TotalSpacesUsed;
}
bool IsCompatibleWith(const RefCntAutoPtr<PipelineResourceSignatureD3D12Impl> ppSignatures[], Uint32 SignatureCount) const noexcept;
private:
// The number of pipeline resource signatures used to initialize this root signature.
const Uint32 m_SignatureCount;
// The total number of register spaces used by this root signature.
Uint32 m_TotalSpacesUsed = 0;
// Root signature hash.
const size_t m_Hash;
CComPtr<ID3D12RootSignature> m_pd3d12RootSignature;
struct ResourceSignatureInfo
{
RefCntAutoPtr<PipelineResourceSignatureD3D12Impl> pSignature;
Uint32 BaseRootIndex = 0;
Uint32 BaseRegisterSpace = 0;
};
std::unique_ptr<ResourceSignatureInfo[]> m_ResourceSignatures;
RootSignatureCacheD3D12& m_Cache;
};
class LocalRootSignatureD3D12
{
public:
LocalRootSignatureD3D12(const char* pCBName, Uint32 ShaderRecordSize);
bool IsShaderRecord(const D3DShaderResourceAttribs& CB) const;
bool Create(ID3D12Device* pDevice, Uint32 RegisterSpace);
ID3D12RootSignature* GetD3D12RootSignature() const { return m_pd3d12RootSignature; }
bool IsDefined() const { return m_ShaderRecordSize > 0 && !m_Name.empty(); }
const char* GetName() const { return m_Name.c_str(); }
Uint32 GetShaderRegister() const { return 0; }
Uint32 GetRegisterSpace() const
{
VERIFY_EXPR(m_RegisterSpace != ~0U);
return m_RegisterSpace;
}
private:
const std::string m_Name;
const Uint32 m_ShaderRecordSize = 0;
Uint32 m_RegisterSpace = ~0u;
CComPtr<ID3D12RootSignature> m_pd3d12RootSignature;
};
/// Root signature cache that deduplicates RootSignatureD3D12 objects.
class RootSignatureCacheD3D12
{
public:
RootSignatureCacheD3D12(RenderDeviceD3D12Impl& DeviceD3D12Impl);
// clang-format off
RootSignatureCacheD3D12 (const RootSignatureCacheD3D12&) = delete;
RootSignatureCacheD3D12 (RootSignatureCacheD3D12&&) = delete;
RootSignatureCacheD3D12& operator = (const RootSignatureCacheD3D12&) = delete;
RootSignatureCacheD3D12& operator = (RootSignatureCacheD3D12&&) = delete;
// clang-format on
~RootSignatureCacheD3D12();
RefCntAutoPtr<RootSignatureD3D12> GetRootSig(const RefCntAutoPtr<PipelineResourceSignatureD3D12Impl>* ppSignatures, Uint32 SignatureCount);
void OnDestroyRootSig(RootSignatureD3D12* pRootSig);
private:
RenderDeviceD3D12Impl& m_DeviceD3D12Impl;
std::mutex m_RootSigCacheMtx;
std::unordered_multimap<size_t, RefCntWeakPtr<RootSignatureD3D12>> m_RootSigCache;
};
} // namespace Diligent
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