Struct PathPlacement 

pub struct PathPlacement {
    pub region: AtlasRegion,
    pub device_rect: [f32; 4],
}

A rasterized path plus the exact rect it must be drawn at.

The two travel together because they are one decision, not two. The atlas bitmap is rasterized on its own integer grid; if the quad that samples it is placed or sized even slightly differently, every texel is resampled through the atlas’s FilterMode::Linear and the coverage mask smears. A 16 dp line-style icon does not survive that: a 1 px stroke drawn at a half-pixel offset peaks at 48 % coverage instead of 100 %, and sub-pixel dash gaps close up entirely, so a dashed ring renders as a grey haze. Returning the rect from the same call that decides the raster is what stops the two from ever disagreeing again.

See PathAtlas::lookup_or_rasterize for when the rect is snapped.

Fields

region: AtlasRegion

Where the coverage mask lives in the atlas texture.

device_rect: [f32; 4]

[x, y, w, h] in pre-transform device pixels — the quad the caller must emit. When snapped this is integral and exactly region.w × region.h, so the mask samples 1:1 onto whole pixels.

Trait Implementations

impl Clone for PathPlacement

fn clone(&self) -> PathPlacement

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for PathPlacement

impl Debug for PathPlacement

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

Formats the value using the given formatter.