ActorTextureStreamingBuildDataComponent.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "UObject/ObjectMacros.h"
#include "Components/ActorComponent.h"
#include "Misc/Guid.h"
#include "Engine/TextureStreamingTypes.h"
#include "ActorTextureStreamingBuildDataComponent.generated.h"
 
class UTexture;
 
USTRUCT()
struct FStreamableTexture
{
    GENERATED_BODY()
 
    FStreamableTexture() {}
 
    FStreamableTexture(const FString& InName, const FGuid& InGuid)
#if WITH_EDITORONLY_DATA
        : Name(InName)
        , Guid(InGuid)
#endif
    {}
 
#if WITH_EDITORONLY_DATA
    UPROPERTY()
    FString Name;
 
    UPROPERTY()
    FGuid Guid;
#endif
 
#if WITH_EDITOR
    ENGINE_API uint32 ComputeHash() const;
#endif
};
 
UCLASS(MinimalAPI)
class UActorTextureStreamingBuildDataComponent : public UActorComponent, public ITextureStreamingContainer
{
    GENERATED_BODY()
 
public:
 
    //~Begin UObject Interface.
    virtual bool IsEditorOnly() const override { return true; }
    //~End UObject Interface.
 
#if WITH_EDITOR
    //~Begin ITextureStreamingContainer Interface.
    ENGINE_API virtual void InitializeTextureStreamingContainer(uint32 InPackedTextureStreamingQualityLevelFeatureLevel) override;
    ENGINE_API virtual uint16 RegisterStreamableTexture(UTexture* InTexture) override;
    ENGINE_API virtual bool GetStreamableTexture(uint16 InTextureIndex, FString& OutTextureName, FGuid& OutTextureGuid) const override;
    //~End ITextureStreamingContainer Interface.
 
    uint32 GetPackedTextureStreamingQualityLevelFeatureLevel() const { return PackedTextureStreamingQualityLevelFeatureLevel; }
    ENGINE_API uint32 ComputeHash() const;
#endif
 
private:
#if WITH_EDITORONLY_DATA
    UPROPERTY()
    TArray<FStreamableTexture> StreamableTextures;
 
    UPROPERTY()
    uint32 PackedTextureStreamingQualityLevelFeatureLevel;
#endif
};