Struct RegionOut 

pub struct RegionOut {

    pub id: String,
    pub name: String,
    pub kind: Kind,
    pub rect: Rect,
    pub cells: Option<Vec<i64>>,
    pub mask: Option<Vec<u8>>,
    pub mask_width: usize,
    pub mask_height: usize,
    pub manual: bool,
    pub unassigned: bool,
    pub exclusions: Vec<Rect>,
    pub crop: Option<Rect>,
    pub solid: bool,
    pub factor: u32,
    pub band_side: Option<u8>,
}

Constructed region, the Rust analogue of Region (types.ts). mask is always analysis-resolution (mask_width × mask_height); RegionAtlas.labels (src/core/layers.ts) is built by regions::atlas::label_atlas over region::Region<&[u8]> (region.rs’s generic Region, instantiated with a borrowed mask — see regions/atlas.rs’s AtlasRegion), constructed directly from the wire request in abi::regions::ls_regions_label_atlas. It never goes through this type.

Fields

id: String

name: String

kind: Kind

rect: Rect

cells: Option<Vec<i64>>

mask: Option<Vec<u8>>

mask_width: usize

mask_height: usize

manual: bool

unassigned: bool

exclusions: Vec<Rect>

crop: Option<Rect>

solid: bool

factor: u32

band_side: Option<u8>

Construction-only annotation (Region & { bandSide?: number } in the TS finish()): which stationary edge band (1=top, 2=bottom, 3=left, 4=right) expand_bands last assigned this region to. A region whose cells touch more than one band keeps only the LAST band expand_bands visits (1, 2, 3, then 4) — reproduced here, not “fixed”, because native_crops reads it the same way.