MaterialCacheVirtualProducer.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "MaterialCache/MaterialCacheAttribute.h"
#include "MaterialCache/MaterialCacheVirtualFinalizer.h"
#include "Engine/Texture2D.h"
#include "VirtualTexturing.h"
#include "RHIFwd.h"
 
class FScene;
 
class FMaterialCacheVirtualProducer : public IVirtualTexture
{
public:
    FMaterialCacheVirtualProducer(FScene* Scene, FPrimitiveComponentId InPrimitiveComponentId, const FMaterialCacheTagLayout& TagLayout, const FVTProducerDescription& InProducerDesc);
 
public: 
    virtual ~FMaterialCacheVirtualProducer() override = default;
 
    virtual bool IsPageStreamed(uint8 vLevel, uint32 vAddress) const override;
 
    virtual FVTRequestPageResult RequestPageData(
        FRHICommandListBase& RHICmdList,
        const FVirtualTextureProducerHandle& ProducerHandle,
        uint8 LayerMask,
        uint8 vLevel,
        uint64 vAddress,
        EVTRequestPagePriority Priority
    ) override;
 
    virtual IVirtualTextureFinalizer* ProducePageData(
        FRHICommandListBase& RHICmdList,
        ERHIFeatureLevel::Type FeatureLevel,
        EVTProducePageFlags Flags,
        const FVirtualTextureProducerHandle& ProducerHandle,
        uint8 LayerMask,
        uint8 vLevel,
        uint64 vAddress,
        uint64 RequestHandle,
        const FVTProduceTargetLayer* TargetLayers
    ) override;
 
    FMaterialCacheVirtualFinalizer Finalizer;
    
private:
    FScene* Scene = nullptr;
 
    FPrimitiveComponentId PrimitiveComponentId;
 
    FVTProducerDescription ProducerDesc;
};