Texture2DStreamIn_DDC.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
/*=============================================================================
Texture2DStreamIn_DDC.h: Stream in helper for 2D textures loading DDC files.
=============================================================================*/
 
#pragma once
 
#include "CoreMinimal.h"
#include "Memory/SharedBuffer.h"
#include "Texture2DStreamIn.h"
#include "UObject/WeakObjectPtr.h"
 
#if WITH_EDITORONLY_DATA
#include "DerivedDataRequestOwner.h"
 
extern int32 GStreamingUseAsyncRequestsForDDC;
 
class FTexture2DStreamIn_DDC : public FTexture2DStreamIn
{
public:
 
    FTexture2DStreamIn_DDC(UTexture2D* InTexture);
    ~FTexture2DStreamIn_DDC();
 
protected:
 
    struct FMipRequestStatus
    {
        FSharedBuffer Buffer;
        bool bRequestIssued = false;
    };
 
    TArray<FMipRequestStatus, TInlineAllocator<MAX_TEXTURE_MIP_COUNT> > DDCMipRequestStatus;
    UE::DerivedData::FRequestOwner DDCRequestOwner;
    TWeakObjectPtr<UTexture2D> Texture;
 
    // ****************************
    // ********* Helpers **********
    // ****************************
 
    // Create DDC load requests
    void DoCreateAsyncDDCRequests(const FContext& Context);
 
    // Create DDC load requests
    bool DoPoolDDCRequests(const FContext& Context);
 
    // Load from DDC into MipData
    void DoLoadNewMipsFromDDC(const FContext& Context);
};
 
#endif // WITH_EDITORONLY_DATA