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  3. IVirtualTexture

IVirtualTexture

This is the interface that can produce tiles of virtual texture data This can be extended to represent different ways of generating VT, such as disk streaming, runtime compositing, or whatever It's provided to the renderer module

API > API/Runtime > API/Runtime/RenderCore

References

   
Module RenderCore
Header /Engine/Source/Runtime/RenderCore/Public/VirtualTexturing.h
Include #include "VirtualTexturing.h"

Syntax

class IVirtualTexture

Remarks

This is the interface that can produce tiles of virtual texture data This can be extended to represent different ways of generating VT, such as disk streaming, runtime compositing, or whatever It's provided to the renderer module

Constructors

  Type Name Description
Public function    

Destructors

  Type Name Description
Public function Virtual    

Functions

  Type Name Description
Public function Virtual void

DumpToConsole ( bool verbose
)

 Dump any type specific debug info.
Public function Virtual Const void

GatherProducePageDataTasks ( FVirtualTextureProducerHandle const& ProducerHandle,
FGraphEventArray& InOutTasks
)

 Collect all task graph events.
Public function Virtual Const void

GatherProducePageDataTasks ( uint64 RequestHandle,
FGraphEventArray& InOutTasks
)

 Collect all task graph events related to a request.
Public function Virtual Const uint32

GetLocalMipBias ( uint8 vLevel,
uint32 vAddress
)

 Gives a localized mip bias for the given local vAddress.
Public function Const bool

IsPageStreamed ( uint8 vLevel,
uint32 vAddress
)

 Whether data for the given page is streamed (e.g. loading from disk).
Public function Virtual void Called on every virtual texture system update once all requests are completed, if bNotifyCompleted is enabled.
Public function IVirtualTextureFinalizer *

ProducePageData ( FRHICommandList& RHICmdList,
ERHIFeatureLevel::Type FeatureLevel,
EVTProducePageFlags Flags,
const FVirtualTextureProducerHandle& ProducerHandle,
uint8 LayerMask,
uint8 vLevel,
uint64 vAddress,
uint64 RequestHandle,
const FVTProduceTargetLayer* TargetLayers
)

 Upload page data to the cache, data must have been previously requested, and reported either 'Available' or 'Pending' The system will attempt to call RequestPageData/ProducePageData only once for a given vLevel/vAddress, with all the requested layers set in LayerMask, this is important for certain types of procedural producers that may generate multiple layers of VT data at the same time It's valid to produce 'Pending' page data, but in this case ProducePageData may block until data is ready Only called from render thread
Public function FVTRequestPageResult

RequestPageData ( FRHICommandList& RHICmdList,
const FVirtualTextureProducerHandle& ProducerHandle,
uint8 LayerMask,
uint8 vLevel,
uint64 vAddress,
EVTRequestPagePriority Priority
)

 Makes a request for the given page data.

Deprecated Functions

  Type Name Description
Public function Virtual FVTRequestPageResult

RequestPageData ( const FVirtualTextureProducerHandle& ProducerHandle,
uint8 LayerMask,
uint8 vLevel,
uint64 vAddress,
EVTRequestPagePriority Priority
)

 RequestPageData now requires an RHI command list.

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