Texture2DMipAllocator_AsyncReallocate.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
/*=============================================================================
Texture2DMipAllocator_AsyncReallocate.h: Implementation of FTextureMipAllocator using RHIAsyncReallocateTexture2D
=============================================================================*/
 
#pragma once
 
#include "CoreMinimal.h"
#include "TextureMipAllocator.h"
#include "Engine/Texture2D.h"
#include "Rendering/Texture2DResource.h"
 
class UTexture2D;
 
class FTexture2DMipAllocator_AsyncReallocate : public FTextureMipAllocator
{
public:
 
    FTexture2DMipAllocator_AsyncReallocate(UTexture* Texture);
    ~FTexture2DMipAllocator_AsyncReallocate();
 
    // ********************************************************
    // ********* FTextureMipAllocator implementation **********
    // ********************************************************
 
    bool AllocateMips(const FTextureUpdateContext& Context, FTextureMipInfoArray& OutMipInfos, const FTextureUpdateSyncOptions& SyncOptions) final override;
    bool UploadMips(const FTextureUpdateContext& Context, const FTextureUpdateSyncOptions& SyncOptions) final override;
    void Cancel(const FTextureUpdateSyncOptions& SyncOptions) final override;
    ETickThread GetCancelThread() const final override;
 
protected:
 
    // Unlock the mips referenced in LockedMipIndices.
    void UnlockNewMips();
 
    // The list of mips that are currently locked.
    TArray<int32, TInlineAllocator<MAX_TEXTURE_MIP_COUNT>> LockedMipIndices;
};