Struct SessionRecorder 

pub struct SessionRecorder<M: Model> { /* private fields */ }

Records a WASM session for deterministic replay.

Wraps a StepProgram and intercepts all input operations, recording them as TraceRecords. Frame checksums are computed after each render using the same FNV-1a algorithm as the render trace system.

Implementations

impl<M: Model> SessionRecorder<M>

pub fn new(model: M, width: u16, height: u16, seed: u64) -> Self

Create a new recorder with the given model, initial size, and seed.

pub fn init(&mut self) -> Result<(), WebBackendError>

Initialize the model and record the first frame checkpoint.

pub fn push_event(&mut self, ts_ns: u64, event: Event)

Record an input event at the given timestamp (nanoseconds since start).

pub fn resize(&mut self, ts_ns: u64, width: u16, height: u16)

Record a resize at the given timestamp.

pub fn advance_time(&mut self, ts_ns: u64, dt: Duration)

Record a time advancement (tick) at the given timestamp.

pub fn step(&mut self) -> Result<StepResult, WebBackendError>

Process one step and record a frame checkpoint if rendered.

pub fn finish(self) -> SessionTrace

Finish recording and return the completed trace.

pub fn program(&self) -> &StepProgram<M>

Access the underlying program.

pub fn program_mut(&mut self) -> &mut StepProgram<M>

Mutably access the underlying program.