#include <TexturePageMap.h>

Public Member Functions
	FTexturePageMap ()

	~FTexturePageMap ()

void	Initialize (uint32 InSize, uint32 InLayerIndex, uint32 InDimensions)

uint32	GetSize () const

uint32	FindPageAddress (uint8 vLogSize, uint32 vAddress) const

FPhysicalSpaceIDAndAddress	FindPagePhysicalSpaceIDAndAddress (const FTexturePage &CheckPage, uint16 Hash) const

FPhysicalSpaceIDAndAddress	FindPagePhysicalSpaceIDAndAddress (uint8 vLogSize, uint32 vAddress) const

uint32	FindNearestPageAddress (uint8 vLogSize, uint32 vAddress) const

uint32	FindNearestPageLevel (uint8 vLogSize, uint32 vAddress) const

void	UnmapPage (FVirtualTextureSystem System, FVirtualTextureSpace Space, uint8 vLogSize, uint32 vAddress, bool bMapAncestorPage)

void	MapPage (FVirtualTextureSpace Space, FVirtualTexturePhysicalSpace PhysicalSpace, uint32 PackedProducerHandle, uint8 MaxLevel, uint8 vLogSize, uint32 vAddress, uint8 Local_vLevel, uint16 pAddress)

void	GetMappedPagesInRange (uint32 vAddress, uint32 Width, uint32 Height, TArray< FMappedTexturePage > &OutMappedPages) const

void	RefreshEntirePageTable (FVirtualTextureSystem System, TArray< FPageTableUpdate > Output)

void	ExpandPageTableUpdatePainters (FVirtualTextureSystem System, FPageTableUpdate Update, TArray< FPageTableUpdate > Output)

void	ExpandPageTableUpdateMasked (FVirtualTextureSystem System, FPageTableUpdate Update, TArray< FPageTableUpdate > Output)

void	InvalidateUnmappedRootPage (FVirtualTextureSpace Space, FVirtualTexturePhysicalSpace PhysicalSpace, uint32 PackedProducerHandle, uint8 MaxLevel, uint8 vLogSize, uint32 vAddress, uint8 Local_vLevel)

Detailed Description

Manages a single layer of a VT page table, contains mappings of virtual->physical address Pages should not be directly mapped/unmapped from this class, this should instead go through FTexturePagePool In the context of page mappings, vLogSize and vLevel refer to 2 similar but slightly different things

vLogSize is the mip level of the virtual address space being mapped (from the allocated VT)
vLevel is the mip level of the producer that's being mapped (somethings called Local_vLevel)
These are often the same value, but can be different in certain situations. For example when unmapping a page, the ancestor page with a higher vLevel is mapped to the same address at vLogSize When different layers have different sizes, mip bias will cause lower vLevel pages to be mapped to address at vLogSize

Constructor & Destructor Documentation

◆ FTexturePageMap()

FTexturePageMap::FTexturePageMap ( )

◆ ~FTexturePageMap()

FTexturePageMap::~FTexturePageMap ( )

Member Function Documentation

◆ ExpandPageTableUpdateMasked()

void FTexturePageMap::ExpandPageTableUpdateMasked	(	FVirtualTextureSystem *	System,
		FPageTableUpdate	Update,
		TArray< FPageTableUpdate > *	Output
	)

◆ ExpandPageTableUpdatePainters()

void FTexturePageMap::ExpandPageTableUpdatePainters	(	FVirtualTextureSystem *	System,
		FPageTableUpdate	Update,
		TArray< FPageTableUpdate > *	Output
	)

◆ FindNearestPageAddress()

uint32 FTexturePageMap::FindNearestPageAddress	(	uint8	vLogSize,
		uint32	vAddress
	)		const

Find the best matching physical address along the mipmap fall back chain for the given virtual address. Returns ~0u if none found at all.

◆ FindNearestPageLevel()

uint32 FTexturePageMap::FindNearestPageLevel	(	uint8	vLogSize,
		uint32	vAddress
	)		const

◆ FindPageAddress()

uint32 FTexturePageMap::FindPageAddress	(	uint8	vLogSize,
		uint32	vAddress
	)		const

Find the physical address for the given virtual address. Returns ~0u if not found.

◆ FindPagePhysicalSpaceIDAndAddress() [1/2]

FPhysicalSpaceIDAndAddress FTexturePageMap::FindPagePhysicalSpaceIDAndAddress	(	const FTexturePage &	CheckPage,
		uint16	Hash
	)		const

inline

◆ FindPagePhysicalSpaceIDAndAddress() [2/2]

FPhysicalSpaceIDAndAddress FTexturePageMap::FindPagePhysicalSpaceIDAndAddress	(	uint8	vLogSize,
		uint32	vAddress
	)		const

◆ GetMappedPagesInRange()

void FTexturePageMap::GetMappedPagesInRange	(	uint32	vAddress,
		uint32	Width,
		uint32	Height,
		TArray< FMappedTexturePage > &	OutMappedPages
	)		const

◆ GetSize()

uint32 FTexturePageMap::GetSize ( ) const

inline

◆ Initialize()

void FTexturePageMap::Initialize	(	uint32	InSize,
		uint32	InLayerIndex,
		uint32	InDimensions
	)

◆ InvalidateUnmappedRootPage()

void FTexturePageMap::InvalidateUnmappedRootPage	(	FVirtualTextureSpace *	Space,
		FVirtualTexturePhysicalSpace *	PhysicalSpace,
		uint32	PackedProducerHandle,
		uint8	MaxLevel,
		uint8	vLogSize,
		uint32	vAddress,
		uint8	Local_vLevel
	)

◆ MapPage()

void FTexturePageMap::MapPage	(	FVirtualTextureSpace *	Space,
		FVirtualTexturePhysicalSpace *	PhysicalSpace,
		uint32	PackedProducerHandle,
		uint8	MaxLevel,
		uint8	vLogSize,
		uint32	vAddress,
		uint8	Local_vLevel,
		uint16	pAddress
	)

Map the physical address to a specific virtual address.

◆ RefreshEntirePageTable()

void FTexturePageMap::RefreshEntirePageTable	(	FVirtualTextureSystem *	System,
		TArray< FPageTableUpdate > *	Output
	)

◆ UnmapPage()

void FTexturePageMap::UnmapPage	(	FVirtualTextureSystem *	System,
		FVirtualTextureSpace *	Space,
		uint8	vLogSize,
		uint32	vAddress,
		bool	bMapAncestorPage
	)

Unmap the physical address from any virtual address it was mapped to before.

The documentation for this class was generated from the following files:

Engine/Source/Runtime/Renderer/Private/VT/TexturePageMap.h
Engine/Source/Runtime/Renderer/Private/VT/TexturePageMap.cpp

Public Member Functions