class ArenaFrameSink

Swift

final class ArenaFrameSink

Publishes frames into a DrawArena for a renderer in another process.

The producer creates the arena and the renderer attaches to it, so a client makes one of these before asking for a surface — the compositor opens what the producer made, which is what keeps the arena's capacity and geometry the producer's business alone.

onPublish is called after each commit, on the frame loop's own thread. It exists because a shared-memory store wakes nobody: the arena's published sequence is the authority on what is current, but somebody still has to say "come and look". That is Compositor.Present, and it stays out of here because LavaUI does not know what a compositor is.

Sources/LavaUI/FrameSink.swift:200

Constructors

init?(id: String, capacity: FrameCapacity = FrameCapacity(
            commands: 1024, glyphs: 4096, meshVertices: 1024,
            spatialVertices: 1024, gradients: 64
        ), onPublish: @escaping () -> Void = {})

Creates the arena named id. Returns nil if one by that name already exists, which is what stops two producers from writing over each other.

Sources/LavaUI/FrameSink.swift:207

Properties

var framesInFlight: Int { get }

Frames published that the renderer has not yet taken.

Sources/LavaUI/FrameSink.swift:220

var generation: UInt32 { get }

Name the renderer attaches by, and what the arena has grown to — both only for logging and tests.

Sources/LavaUI/FrameSink.swift:224

var mappedBytes: Int { get }

Bytes of shared memory the arena currently maps.

Sources/LavaUI/FrameSink.swift:226

Methods

func beginFrame(minimum: FrameCapacity) -> FrameBuffers?

Not documented.

Sources/LavaUI/FrameSink.swift:228

func commit(_ written: FrameCapacity)

Not documented.

Sources/LavaUI/FrameSink.swift:242

func grow(to wanted: FrameCapacity, written: FrameCapacity) -> FrameBuffers?

Not documented.

Sources/LavaUI/FrameSink.swift:236