Enum Step 

pub enum Step {
    NeedIndex {
        level: u32,
    },
    NeedChildren {
        level: u32,
        x: i32,
        y: i32,
        children: [TileKey; 4],
    },
    Parent {
        level: u32,
        x: i32,
        y: i32,
        pixels: Option<Vec<u8>>,
    },
    LevelDone {
        level: u32,
    },
    Done,
}

Variants

NeedIndex

Pass every stored tile-index row of level level - 1 to PyramidSession::queue, then step again.

Fields

level: u32

NeedChildren

Read these four child tiles (quadrant order: [dx=0,dy=0], [1,0], [0,1], [1,1]), pass their decoded pixels (or None for one that is not stored) to PyramidSession::provide, then step again.

Fields

level: u32

x: i32

y: i32

children: [TileKey; 4]

Parent

One queued parent is done: store pixels (size × size RGBA) as tile x_y of level when there are any, then drop the parent from the queue and step again.

Fields

level: u32

x: i32

y: i32

pixels: Option<Vec<u8>>

LevelDone

Every parent of level is done: the canvas now has level as its top level.

Fields

level: u32

Done

Trait Implementations

impl Clone for Step

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Step

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for Step

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Step