withFrameNanos

public suspend fun <R> withFrameNanos(onFrame: (frameTimeNanos: Long) -> R): R

Suspends until a new frame is requested, immediately invokes onFrame with the frame time in nanoseconds in the calling context of frame dispatch, then resumes with the result from onFrame.

frameTimeNanos should be used when calculating animation time deltas from frame to frame as it may be normalized to the target time for the frame, not necessarily a direct, "now" value.

The time base of the value provided by withFrameNanos is implementation defined. Time values provided are strictly monotonically increasing; after a call to withFrameNanos completes it must not provide the same value again for a subsequent call.

This function will invoke MonotonicFrameClock.withFrameNanos using the calling CoroutineContext's MonotonicFrameClock and will throw an IllegalStateException if one is not present in the CoroutineContext.