D3D12LegacyBarriers.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "D3D12RHIDefinitions.h"
 
#if D3D12RHI_SUPPORTS_LEGACY_BARRIERS
 
#include "ID3D12Barriers.h"
 
struct FD3D12LegacyBarriersTransitionData;
class FD3D12LegacyBarriersBatcher;
 
//
// Separate the implementation details from the fulfillment of
// the ID3D12BarriersForAdapter interface so that other platforms
// which need to further specialize both the interface and the 
// implementation don't run into the diamond inheritance problem
// with the interface or are forced to have multiple v-tables
//
 
namespace FD3D12LegacyBarriersForAdapterImpl
{
    D3D12_RESOURCE_STATES GetInitialState(
        ED3D12Access InD3D12Access,
        const FD3D12ResourceDesc& InDesc);
 
    void ConfigureDevice(
        ID3D12Device* Device,
        bool InWithD3DDebug);
 
    uint64 GetTransitionDataSizeBytes();
    uint64 GetTransitionDataAlignmentBytes();
 
    void CreateTransition(
        FRHITransition* Transition,
        const FRHITransitionCreateInfo& CreateInfo);
 
    void ReleaseTransition(
        FRHITransition* Transition);
 
    HRESULT CreateCommittedResource(
        FD3D12Adapter& Adapter,
        const D3D12_HEAP_PROPERTIES& InHeapProps,
        D3D12_HEAP_FLAGS InHeapFlags,
        const FD3D12ResourceDesc& InDesc,
        ED3D12Access InInitialD3D12Access,
        const D3D12_CLEAR_VALUE* InClearValue,
        TRefCountPtr<ID3D12Resource>& OutResource);
    
    HRESULT CreateReservedResource(
        FD3D12Adapter& Adapter,
        const FD3D12ResourceDesc& InDesc,
        ED3D12Access InInitialD3D12Access,
        const D3D12_CLEAR_VALUE* InClearValue,
        TRefCountPtr<ID3D12Resource>& OutResource);
 
    HRESULT CreatePlacedResource(
        FD3D12Adapter& Adapter,
        ID3D12Heap* Heap,
        uint64 InHeapOffset,
        const FD3D12ResourceDesc& InDesc,
        ED3D12Access InInitialD3D12Access,
        const D3D12_CLEAR_VALUE* InClearValue,
        TRefCountPtr<ID3D12Resource>& OutResource);
 
} // namespace FD3D12LegacyBarriersForAdapterImpl
 
class FD3D12LegacyBarriersForAdapter final
    : public ID3D12BarriersForAdapter
{
public:
    virtual ~FD3D12LegacyBarriersForAdapter();
 
    virtual void ConfigureDevice(
        ID3D12Device* Device,
        bool InWithD3DDebug) const override final;
 
    virtual uint64 GetTransitionDataSizeBytes() const override final;
    virtual uint64 GetTransitionDataAlignmentBytes() const override final;
 
    virtual void CreateTransition(
        FRHITransition* Transition,
        const FRHITransitionCreateInfo& CreateInfo) const override final;
 
    virtual void ReleaseTransition(
        FRHITransition* Transition) const override final;
 
    virtual HRESULT CreateCommittedResource(
        FD3D12Adapter& Adapter,
        const D3D12_HEAP_PROPERTIES& InHeapProps,
        D3D12_HEAP_FLAGS InHeapFlags,
        const FD3D12ResourceDesc& InDesc,
        ED3D12Access InInitialD3D12Access,
        const D3D12_CLEAR_VALUE* InClearValue,
        TRefCountPtr<ID3D12Resource>& OutResource) const override final;
 
    virtual HRESULT CreateReservedResource(
        FD3D12Adapter& Adapter,
        const FD3D12ResourceDesc& InDesc,
        ED3D12Access InInitialD3D12Access,
        const D3D12_CLEAR_VALUE* InClearValue,
        TRefCountPtr<ID3D12Resource>& OutResource) const override final;
 
    virtual HRESULT CreatePlacedResource(
        FD3D12Adapter& Adapter,
        ID3D12Heap* Heap,
        uint64 InHeapOffset,
        const FD3D12ResourceDesc& InDesc,
        ED3D12Access InInitialD3D12Access,
        const D3D12_CLEAR_VALUE* InClearValue,
        TRefCountPtr<ID3D12Resource>& OutResource) const override final;
 
    virtual const TCHAR* GetImplementationName() const override final;
};
 
class FD3D12LegacyBarriersForContext final
    : public ID3D12BarriersForContext
{
public:
    FD3D12LegacyBarriersForContext();
    virtual ~FD3D12LegacyBarriersForContext();
 
    virtual void BeginTransitions(
        FD3D12CommandContext& Context,
        TArrayView<const FRHITransition*> Transitions) override final;
 
    virtual void EndTransitions(
        FD3D12CommandContext& Context,
        TArrayView<const FRHITransition*> Transitions) override final;
 
    virtual void AddGlobalBarrier(
        FD3D12ContextCommon& Context,
        ED3D12Access D3D12AccessBefore,
        ED3D12Access D3D12AccessAfter) override final;
 
    virtual void AddBarrier(
        FD3D12ContextCommon& Context,
        const FD3D12Resource* pResource,
        ED3D12Access D3D12AccessBefore,
        ED3D12Access D3D12AccessAfter,
        uint32 Subresource) override final;
 
    virtual void FlushIntoCommandList(
        class FD3D12CommandList& CommandList,
        class FD3D12QueryAllocator& TimestampAllocator) override final;
 
    virtual int32 GetNumPendingBarriers() const override final;
 
private:
    struct FD3D12DiscardResource;
 
    static void HandleReservedResourceCommits(
        FD3D12CommandContext& Context,
        const FD3D12LegacyBarriersTransitionData* TransitionData);
 
    void HandleResourceDiscardTransitions(
        FD3D12CommandContext& Context,
        const FD3D12LegacyBarriersTransitionData* TransitionData,
        TArray<FD3D12DiscardResource>& ResourcesToDiscard);
 
    void HandleDiscardResources(
        FD3D12CommandContext& Context,
        TArrayView<const FRHITransition*> Transitions,
        bool bIsBeginTransition);
 
    void HandleTransientAliasing(
        FD3D12CommandContext& Context,
        const FD3D12LegacyBarriersTransitionData* TransitionData);
 
    void HandleResourceTransitions(
        FD3D12CommandContext& Context,
        const FD3D12LegacyBarriersTransitionData* TransitionData,
        bool& bUAVBarrier);
 
    void TransitionResource(
        FD3D12ContextCommon& Context,
        const FD3D12Resource* InResource,
        D3D12_RESOURCE_STATES InBeforeState,
        D3D12_RESOURCE_STATES InAfterState,
        uint32 InSubresourceIndex);
 
    const TUniquePtr<FD3D12LegacyBarriersBatcher> Batcher;
};
 
#endif // D3D12RHI_SUPPORTS_LEGACY_BARRIERS