MultiSizeIndexContainer.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "RawIndexBuffer.h"
 
struct FMultiSizeIndexContainerData
{
    TArray<uint32> Indices;
    uint32 DataTypeSize;
};
 
class FMultiSizeIndexContainer
{
public:
    FMultiSizeIndexContainer()
        : DataTypeSize(sizeof(uint16))
        , IndexBuffer(NULL)
    {
    }
 
    ENGINE_API ~FMultiSizeIndexContainer();
 
    ENGINE_API void SetOwnerName(const FName& OwnerName);
 
    void InitResources();
 
    void ReleaseResources();
 
    ENGINE_API void Serialize(FArchive& Ar, bool bNeedsCPUAccess);
 
    void SerializeMetaData(FArchive& Ar, bool bNeedsCPUAccess);
 
    ENGINE_API void CreateIndexBuffer(uint8 DataTypeSize);
 
    ENGINE_API void RebuildIndexBuffer(uint8 InDataTypeSize, const TArray<uint32>& NewArray);
 
    ENGINE_API void GetIndexBuffer(TArray<uint32>& OutArray) const;
 
    ENGINE_API void CopyIndexBuffer(const TArray<uint32>& NewArray);
 
    bool IsIndexBufferValid() const { return IndexBuffer != NULL; }
 
    uint8 GetDataTypeSize() const { return DataTypeSize; }
    FRawStaticIndexBuffer16or32Interface* GetIndexBuffer()
    {
        check(IndexBuffer != NULL);
        return IndexBuffer;
    }
    const FRawStaticIndexBuffer16or32Interface* GetIndexBuffer() const
    {
        check(IndexBuffer != NULL);
        return IndexBuffer;
    }
 
#if WITH_EDITOR
    ENGINE_API void GetIndexBufferData(FMultiSizeIndexContainerData& OutData) const;
 
    ENGINE_API FMultiSizeIndexContainer(const FMultiSizeIndexContainer& Other);
    ENGINE_API FMultiSizeIndexContainer& operator=(const FMultiSizeIndexContainer& Buffer);
#endif
 
    friend FArchive& operator<<(FArchive& Ar, FMultiSizeIndexContainer& Buffer);
 
    ENGINE_API FBufferRHIRef CreateRHIBuffer(FRHICommandListBase& RHICmdList);
 
    void InitRHIForStreaming(FRHIBuffer* IntermediateBuffer, FRHIResourceReplaceBatcher& Batcher);
    void ReleaseRHIForStreaming(FRHIResourceReplaceBatcher& Batcher);
 
private:
    uint8 DataTypeSize;
    FRawStaticIndexBuffer16or32Interface* IndexBuffer;
};