Struct Chunk 

pub struct Chunk {
    pub x: usize,
    pub y: usize,
    pub width: usize,
    pub height: usize,
    pub halo: usize,
    pub data: Vec<f32>,
}

A chunk of raster data extracted from a RasterSource, including surrounding halo (ghost/overlap) cells.

The data field holds (width + 2 * halo) × (height + 2 * halo) pixels in row-major order. Coordinate (0, 0) in data corresponds to raster position (x.saturating_sub(halo), y.saturating_sub(halo)); pixels that would fall outside the source raster are zero-padded.

Fields

x: usize

Top-left x of the core region (without halo) in source coordinates.

y: usize

Top-left y of the core region (without halo) in source coordinates.

width: usize

Width of the core region (pixels, without halo columns).

height: usize

Height of the core region (pixels, without halo rows).

halo: usize

Halo size on each of the four sides (in pixels).

data: Vec<f32>

Row-major data of size (width + 2*halo) × (height + 2*halo).

Row 0 and row height + 2*halo - 1 are halo rows; column 0 and column width + 2*halo - 1 are halo columns. The origin (0, 0) maps to source position (x.saturating_sub(halo), y.saturating_sub(halo)).

Implementations

impl Chunk

pub fn get_core(&self, col: usize, row: usize) -> f32

Returns the value at (col, row) within the core region, applying the halo offset transparently.

col must be in 0..self.width and row in 0..self.height.

pub fn full_width(&self) -> usize

Returns the full width of data (core width + 2 * halo).

pub fn full_height(&self) -> usize

Returns the full height of data (core height + 2 * halo).