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> Unreal Engine API Reference > Runtime > RenderCore > IVirtualTexture > IVirtualTexture::ProducePageData

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IVirtualTexture::ProducePageData

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

Windows

MacOS

Linux

References

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

Syntax

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

Remarks

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

Returns

a 'IVirtualTextureFinalizer' which must be finalized to complete the operation

Parameters

Parameter	Description
RHICmdList	Used to write any commands required to generate the VT page data
FeatureLevel	The current RHI feature level
ProducerHandle	Handle to this producer
LayerMask	Mask of requested layers; can be used to only produce data for these layers as an optimization, or ignored if all layers are logically produced together
vLevel	The mipmap level of the data
vAddress	Bit-interleaved x,y page indexes
RequestHandle	opaque handle returned from 'RequestPageData'
TargetLayers	Array of 'FVTProduceTargetLayer' structs, gives location where each layer should write data

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