Texture2DMipAllocator_AsyncCreate.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
/*=============================================================================
Texture2DStreamIn_AsyncCreate.h: Implementation of FTextureMipAllocator using RHIAsyncCreateTexture2D
=============================================================================*/
 
#pragma once
 
#include "CoreMinimal.h"
#include "TextureMipAllocator.h"
#include "Engine/Texture2D.h"
#include "Rendering/Texture2DResource.h"
 
class UTexture2D;
 
class FTexture2DMipAllocator_AsyncCreate : public FTextureMipAllocator
{
public:
 
    FTexture2DMipAllocator_AsyncCreate(UTexture* Texture);
    ~FTexture2DMipAllocator_AsyncCreate();
 
    // ********************************************************
    // ********* 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:
 
    // Release the temporary buffers referenced in FinalMipData.
    void ReleaseAllocatedMipData();
 
    // The final resolution x and y of the texture 2d.
    int32 FinalSizeX = 0;
    int32 FinalSizeY = 0;
    // The initial and final format of the texture.
    EPixelFormat FinalFormat = EPixelFormat::PF_Unknown;
    // The temporary main memory allocations holding the mip data
    TArray<void*, TInlineAllocator<MAX_TEXTURE_MIP_COUNT>> FinalMipData;
};