TileAdmin Namespace

Interface

Name	Description
TileAdmin.Props	Describes the configuration of the TileAdmin.
TileAdmin.Statistics	Statistics regarding the current and cumulative state of the TileAdmin.

Variable

Name	Description
TileAdmin.mobileGpuMemoryLimits	The number of bytes of GPU memory associated with the various GpuMemoryLimits for mobile devices.
TileAdmin.nonMobileGpuMemoryLimits	The number of bytes of GPU memory associated with the various GpuMemoryLimits for non-mobile devices.

Defined in

• 65/itwinjs-core/core/frontend/src/tile/TileAdmin.ts Line 106

TileAdmin Class

Manages Tiles and TileTrees on behalf of IModelApp. Its responsibilities include scheduling requests for tile content via a priority queue; keeping track of and imposing limits upon the amount of GPU memory consumed by tiles; and notifying listeners of tile-related events.

@see - tileAdmin to access the instance of the TileAdmin.

• TileAdmin.Props to configure the TileAdmin at startup.

Methods

Name	Description
addLoadListener(callback: (imodel: IModelConnection) => void): () => void	Subscribe to onTileLoad, onTileTreeLoad, and onTileChildrenLoad.
clearTilesForUser(user: TileUser): void	Clears the sets of tiles associated with a TileUser.
forgetUser(user: TileUser): void	Indicates that the TileAdmin should cease tracking the specified TileUser, e.g.
getMaximumMajorTileFormatVersion(formatVersion?: number): number	Given a numeric combined major+minor tile format version (typically obtained from a request to the backend to query the maximum tile format version it supports),
getNumRequestsForUser(user: TileUser): number	Returns the number of pending and active requests associated with the specified user.
getNumRequestsForViewport(vp: Viewport): number	Returns the number of pending and active requests associated with the specified viewport.
queryVersionInfo(): Promise<Readonly<TileVersionInfo>>	Obtain information about the version/format of the tiles supplied by the backend.
registerUser(user: TileUser): void	Indicates that the TileAdmin should track tile requests for the specified TileUser.
requestElementGraphics(iModel: IModelConnection, requestProps: ElementGraphicsRequestProps): Promise<undefined | Uint8Array>	Request graphics for a single element or geometry stream.
resetStatistics(): void	Resets the cumulative (per-session) statistics like totalCompletedRequests, totalEmptyTiles, etc.
create(props?: TileAdmin.Props): Promise<TileAdmin> Static	Create a TileAdmin suitable for passing to startup via tileAdmin to customize aspects of

Properties

Name	Type	Description
cesiumIonKey Readonly	string | undefined
channels Readonly	TileRequestChannels
defaultTileSizeModifier Accessor	number	A default multiplier applied to the size in pixels of a Tile during tile selection for any Viewport.
gpuMemoryLimit Accessor	GpuMemoryLimit	The strategy for limiting the amount of GPU memory allocated to Tile graphics.
maxTotalTileContentBytes Accessor ReadOnly	undefined | number	The maximum number of bytes of GPU memory that can be allocated to the contents of Tiles.
onTileChildrenLoad Readonly	BeEvent<(parentTile: Tile) => void>	Event raised when a request to load a tile's child tiles completes.
onTileLoad Readonly	BeEvent<(tile: Tile) => void>	Event raised when a request to load a tile's content completes.
onTileTreeLoad Readonly	BeEvent<(tileTree: TileTreeOwner) => void>	Event raised when a request to load a tile tree completes.
statistics Accessor ReadOnly	TileAdmin.Statistics	Returns basic statistics about the TileAdmin's current state.
totalTileContentBytes Accessor ReadOnly	number	The total number of bytes of GPU memory allocated to Tile contents.

Defined in

• 65/itwinjs-core/core/frontend/src/tile/TileAdmin.ts Line 106