GPUSort.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
/*=============================================================================
    GPUSort.cpp: Interface for sorting buffers on the GPU.
=============================================================================*/
 
#pragma once
 
#include "CoreMinimal.h"
#include "RHI.h"
 
struct FGPUSortBuffers
{
    FRHIShaderResourceView* RemoteKeySRVs[2];
    FRHIUnorderedAccessView* RemoteKeyUAVs[2];
 
    FRHIShaderResourceView* RemoteValueSRVs[2];
    FRHIUnorderedAccessView* RemoteValueUAVs[2];
 
    FRHIShaderResourceView* FirstValuesSRV = nullptr;
    FRHIUnorderedAccessView* FinalValuesUAV = nullptr;
 
    FGPUSortBuffers()
    {
    }
};
 
int32 GetGPUSortPassCount(uint32 KeyMask);
 
ENGINE_API int32 SortGPUBuffers(FRHICommandList& RHICmdList, FGPUSortBuffers SortBuffers, int32 BufferIndex, uint32 KeyMask, int32 Count, ERHIFeatureLevel::Type FeatureLevel);
 
enum EGPUSortTest
{
    GPU_SORT_TEST_SMALL = 1,
    GPU_SORT_TEST_LARGE,
    GPU_SORT_TEST_EXHAUSTIVE,
    GPU_SORT_TEST_RANDOM
};
 
void TestGPUSort(EGPUSortTest TestToRun, ERHIFeatureLevel::Type FeatureLevel);