Struct Plan 

pub struct Plan { /* private fields */ }

One canvas’s frame plan.

Implementations

impl Plan

pub fn new(cap: usize, budget: usize) -> Plan

A plan holding at most cap tiles, with at most budget in flight.

pub fn damage(&mut self, theme: Theme, origin: (f64, f64), rects: &[KRect])

Marks stale every tile of theme, held or in flight, that overlaps one of rects — in the design’s coordinates, the drawing’s top-left at origin — at every level.

pub fn damage_all(&mut self, theme: Theme)

Marks every tile of theme, held or in flight, stale.

pub fn frame( &mut self, theme: Theme, area: KRect, view: &View, needed: &[(u32, u32)], settled: bool, ) -> Work

The frame of view of the drawing area in theme, which needed — the tiles the view needs at its own level, nearest its middle first — makes current. Every held tile of the theme the view shows is drawn, as a stand-in where it is stale or at another level; once a zoom has settled, the missing and stale tiles are asked for in needed’s order while fewer than the budget are in flight.

pub fn arrived(&mut self, ticket: Ticket) -> Arrival

The painting asked for under ticket has arrived: held in place of the tile’s last, which is let go, as are the least recently used past the cap — or dropped, when the ticket isn’t one in flight.

pub fn missed(&mut self, ticket: Ticket)

The tile asked for under ticket was painted as nothing — the scene couldn’t be drawn when it was asked of — so it is no longer in flight, and is asked for again.