VolumeTextureStreaming.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
/*=============================================================================
VolumeTextureStreaming.h: Helpers to stream in and out volume texture LODs.
=============================================================================*/
 
#pragma once
 
#include "CoreMinimal.h"
#include "RenderAssetUpdate.h"
#include "Engine/VolumeTexture.h"
#include "Rendering/Texture3DResource.h"
#include "Texture2DMipDataProvider_DDC.h"
#include "Texture2DMipDataProvider_IO.h"
#include "TextureMipAllocator.h"
 
#if WITH_EDITORONLY_DATA
typedef FTexture2DMipDataProvider_DDC FVolumeTextureMipDataProvider_DDC;
#endif
 
typedef FTexture2DMipDataProvider_IO FVolumeTextureMipDataProvider_IO;
 
class FVolumeTextureMipAllocator_Reallocate : public FTextureMipAllocator
{
public:
 
    FVolumeTextureMipAllocator_Reallocate(UTexture* Texture);
    ~FVolumeTextureMipAllocator_Reallocate();
 
    // ********************************************************
    // ********* 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:
    // The temporary main memory allocations holding the mip data
    FVolumeTextureBulkData StreamedInMipData;
};