Struct FixedHistory 

pub struct FixedHistory { /* private fields */ }

Per-pixel run history of one fixed region, laid out over its floored rect.

Implementations

impl FixedHistory

pub fn new(region: Rect) -> Self

pub fn bytes(region: Rect) -> f64

Bytes the history holds.

pub fn first_frame(&self) -> Option<u32>

The frame whose values FixedHistory::first starts from.

pub fn closed(&self) -> bool

pub fn frame0(&self) -> &[u32]

The first frame’s values, packed RGBA over the region’s rect (0 where the region owns no pixel).

pub fn update( &mut self, rgba: &[u8], labels: &[u8], consistent: &[u8], width: usize, height: usize, code: u8, frame: u32, limit: u32, ) -> usize

Takes frame frame’s pixels (rgba, width × height, atlas labels, the region’s code, the region’s consistency mask consistent): a pixel that moved beyond limit (the RGB difference sum the source noise allows) from its current run ends that run. When the pixels that settled into a new value (consistent with a neighbouring frame) are more than a pointer could cover, the region changed state and the first epoch ends here. Returns that count of settled pixels.

pub fn close(&mut self, end: u32)

Ends the first epoch before frame end: every current run is counted up to it, and later updates are ignored.

pub fn first(&self, limit: u32) -> Vec<u32>

The first frame’s pixels with its transients replaced (call after FixedHistory::close): where the value a pixel held longest in the first epoch differs from the first frame by more than limit, inside a patch no larger than a pointer, the longest-held value; elsewhere the first frame. Packed RGBA over the region’s rect; 0 where the region owns no pixel.

pub fn paint( &self, first: &[u32], rgba: &mut [u8], width: usize, height: usize, ) -> bool

Writes FixedHistory::first into a frame-sized rgba at the region’s pixels; returns whether any byte changed.