VirtualTexturePoolConfig.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "Engine/DeveloperSettings.h"
#include "RenderResource.h"
 
#include "VirtualTexturePoolConfig.generated.h"
 
USTRUCT()
struct FVirtualTextureSpacePoolConfig
{
    GENERATED_USTRUCT_BODY()
 
    
    UPROPERTY(EditAnywhere, Category = "PoolConfig|Filter")
    TArray< TEnumAsByte<EPixelFormat> > Formats;
 
    UPROPERTY(EditAnywhere, Category = "PoolConfig|Filter")
    int32 MinTileSize = 0;
 
    UPROPERTY(EditAnywhere, Category = "PoolConfig|Filter")
    int32 MaxTileSize = 0;
 
    UPROPERTY(EditAnywhere, Category = PoolConfig)
    int32 SizeInMegabyte = 0;
 
    UPROPERTY(EditAnywhere, Category = PoolConfig)
    bool bEnableResidencyMipMapBias = false;
 
    UPROPERTY(EditAnywhere, Category = PoolConfig, meta = (ClampMin = "0", ClampMax = "3", UIMin = "0", UIMax = "3"))
    int32 ResidencyMipMapBiasGroup = 0;
 
    UPROPERTY(EditAnywhere, Category = "PoolConfig|Scalabiity")
    bool bAllowSizeScale = false;
 
    UPROPERTY(EditAnywhere, Category = "PoolConfig|Scalability")
    int32 MinScaledSizeInMegabyte = 0;
 
    UPROPERTY(EditAnywhere, Category = "PoolConfig|Scalability")
    int32 MaxScaledSizeInMegabyte = 0;
 
    bool IsDefault() const { return Formats.Num() == 0 && SizeInMegabyte > 0; }
};
 
UCLASS(config = Engine, defaultconfig, meta = (DisplayName = "Virtual Texture Pool"), MinimalAPI)
class UVirtualTexturePoolConfig : public UDeveloperSettings
{
    GENERATED_UCLASS_BODY()
    
    
    UPROPERTY(config, EditAnywhere, Category = PoolConfig)
    int32 DefaultSizeInMegabyte = 64;
 
    UPROPERTY(config, EditAnywhere, Category = PoolConfig)
    bool bPoolAutoGrowInEditor = true;
 
    UPROPERTY(config, EditAnywhere, Category = PoolConfig, meta=(DisplayName="Fixed Pools", TitleProperty = "Formats"))
    TArray<FVirtualTextureSpacePoolConfig> Pools;
 
    UPROPERTY(Transient, EditAnywhere, Category = PoolConfig, meta = (TitleProperty = "Formats"))
    TArray<FVirtualTextureSpacePoolConfig> TransientPools;
 
    void FindPoolConfig(TEnumAsByte<EPixelFormat> const* InFormats, int32 InNumLayers, int32 InTileSize, FVirtualTextureSpacePoolConfig& OutConfig) const;
 
    bool AddOrModifyTransientPoolConfig(FVirtualTextureSpacePoolConfig const& InConfig);
 
#if WITH_EDITOR
    void PostEditChangeProperty(struct FPropertyChangedEvent& PropertyChangedEvent) override;
#endif
};
 
struct VirtualTexturePool
{
    ENGINE_API static void FindPoolConfig(TEnumAsByte<EPixelFormat> const* InFormats, int32 InNumLayers, int32 InTileSize, FVirtualTextureSpacePoolConfig& OutConfig);
    ENGINE_API static void AddOrModifyTransientPoolConfigs_RenderThread(TArray<FVirtualTextureSpacePoolConfig>& InConfigs);
    ENGINE_API static float GetPoolSizeScale();
    ENGINE_API static bool GetPoolAutoGrow();
    ENGINE_API static bool Support16BitPageTables();
    ENGINE_API static int32 GetSplitPhysicalPoolSize();
    ENGINE_API static uint32 GetConfigHash();
};