Struct Shared

struct Shared {
    clock: Mutex<Clock>,
    frame: Mutex<Option<Arc<Frame>>>,
    layers: Mutex<Option<Arc<LayerSet>>>,
    project: Mutex<Arc<Project>>,
    cache_hits: AtomicU64,
    buffering: AtomicBool,
}

Fields

clock: Mutex<Clock>

frame: Mutex<Option<Arc<Frame>>>

Newest rendered frame not yet taken by the UI.

layers: Mutex<Option<Arc<LayerSet>>>

GPU mode: newest decoded layer set not yet taken by the UI (no CPU compositing happened).

project: Mutex<Arc<Project>>

cache_hits: AtomicU64

Frames/layer sets served from the RAM cache instead of being rendered (observability + tests).

buffering: AtomicBool

Playback fell behind decode: the UI should pause the clock and show a spinner until cleared.