Struct PngDump 

pub struct PngDump { /* private fields */ }

PNG stills per sampled tick: <dir>/<watcher>/NNNNNN-{input,baseline,overlay,output}.png.

Encoding and disk I/O happen on a dedicated writer thread behind a bounded channel; frames are dropped (and counted) if the writer lags.

Implementations

impl PngDump

pub fn dir(dir: impl Into<PathBuf>) -> Self

Write stills under dir (created on demand).

pub fn sample_every(self, n: u64) -> Self

Only write every Nth tick (default 1 = every tick).

pub fn dropped(&self) -> u64

Frames dropped because the writer thread lagged.

Trait Implementations

impl DebugSink for PngDump

fn write(&mut self, tick: u64, stage: DebugStage, frame: &Frame)

fn set_label(&mut self, label: &str)

Receives the watcher name at subscribe time (used e.g. for output subdirectories). Default: ignore.

impl Drop for PngDump

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.