Texture2DStreamIn_IO_Virtual.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
/*=============================================================================
Texture2DStreamIn_IO_Virtual.h: Async create path for streaming in texture 2D mips.
=============================================================================*/
 
#pragma once
 
#include "CoreMinimal.h"
#include "Texture2DStreamIn_IO.h"
 
class FTexture2DStreamIn_IO_Virtual : public FTexture2DStreamIn_IO
{
public:
 
    FTexture2DStreamIn_IO_Virtual(UTexture2D* InTexture, bool InPrioritizedIORequest);
 
protected:
 
    // ****************************
    // ******* Update Steps *******
    // ****************************
 
    // Validate the filename and bulk data, then lock new mips. (RenderThread)
    void LockMips(const FContext& Context);
    // Create load requests into each locked mips. (AsyncThread)
    void LoadMips(const FContext& Context);
    // Clear the IO requests and call Finalize. (AsyncThread)
    void PostLoadMips(const FContext& Context);
    // Apply the intermediate texture and cleanup. (RenderThread)
    void Finalize(const FContext& Context);
 
    // ****************************
    // ******* Cancel Steps *******
    // ****************************
 
    // Cancel pending IO then cancel (Async)
    void CancelIO(const FContext& Context);
    // Unlock the mips, cancel load requests and clean up. (RenderThread)
    void Cancel(const FContext& Context);
};