MaterialCacheVirtualTexture.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "Engine/Texture.h"
#include "MaterialCache/MaterialCacheVirtualTextureTag.h"
#include "MaterialCacheVirtualTexture.generated.h"
 
#define UE_API ENGINE_API
 
class UMaterialCacheStackProvider;
class FMaterialCacheVirtualTextureRenderProxy;
class FVirtualTexture2DResource;
class FSceneInterface;
struct FMaterialCacheVirtualBaton;
 
UCLASS(MinimalAPI, Experimental)
class UMaterialCacheVirtualTexture : public UTexture
{
    GENERATED_UCLASS_BODY()
 
public:
    UE_API virtual ~UMaterialCacheVirtualTexture() override;
 
    UPROPERTY(VisibleAnywhere, Category="Material Cache")
    TWeakObjectPtr<UPrimitiveComponent> OwningComponent;
 
    UPROPERTY(VisibleAnywhere, Category="Material Cache")
    TWeakObjectPtr<UMaterialCacheStackProvider> MaterialStackProvider;
 
    UPROPERTY(VisibleAnywhere, Category="Material Cache")
    TObjectPtr<UMaterialCacheVirtualTextureTag> Tag;
 
    UPROPERTY(VisibleAnywhere, Category="Material Cache")
    FIntPoint TileCount = FIntPoint(8, 8);
 
public:
    UE_API void Flush();
 
    UE_API void Unregister();
 
    UE_API FIntPoint GetRuntimeTileCount() const;
 
    UE_API FMaterialCacheVirtualTextureRenderProxy* CreateRenderProxy(uint32 UVCoordinateIndex);
 
    UE_API FMaterialCacheTagLayout GetRuntimeLayout() const;
 
public: 
    UE_API virtual void GetVirtualTextureBuildSettings(FVirtualTextureBuildSettings& OutSettings) const override;
    UE_API virtual void UpdateResourceWithParams(EUpdateResourceFlags InFlags) override;
    UE_API virtual EMaterialValueType GetMaterialType() const override;
    UE_API virtual uint32 GetSurfaceArraySize() const override;
    UE_API virtual float GetSurfaceDepth() const override;
    UE_API virtual float GetSurfaceHeight() const override;
    UE_API virtual float GetSurfaceWidth() const override;
    UE_API virtual ETextureClass GetTextureClass() const override;
    UE_API virtual FTextureResource* CreateResource() override;
    UE_API virtual bool IsCurrentlyVirtualTextured() const override;
 
private:    
    void CreateSceneProxy();
    FVirtualTexture2DResource* GetVirtualTexture2DResource();
    FSceneInterface* GetScene();
 
private:
    IAllocatedVirtualTexture* RTVirtualTextureStalePtr = nullptr;
 
    FMaterialCacheVirtualBaton* RTDestructionBaton = nullptr;
};
 
#undef UE_API