Module snapshot 

The owned per-frame snapshot the extraction phase fills from world state and the submission phase consumes. Self-contained by construction: no borrows into component storage, resources, or the backend, so a frame’s draw inputs can outlive the world borrow that produced them and later cross a thread boundary. Buffers keep their capacity across frames; a steady-state extraction allocates nothing.

Structs

FrameScalars

Camera and frame-wide flags for one frame’s draw.

RenderSnapshot

Everything one frame’s draw consumes, extracted from world state.

SceneOpRecorder

A SceneControl that records calls as SceneOps instead of driving a backend, so scene-flow logic can run during extraction.

SpanBuffer

Variable-length per-slot updates flattened into one values buffer plus (slot, range) spans, so extraction copies into persistent storage and submission replays one backend call per span.

UiIntents

Window-interaction intents resolved during extraction, applied verbatim by submission. None means “do not touch the current state this frame”.

Enums

SceneOp

One recorded scene-visibility effect, replayed onto the backend at submission in record order.