fn mask_coverage(
mask: &Mask,
w: u32,
h: u32,
t: f64,
scale: f32,
centre: (f32, f32),
out: &mut Vec<u8>,
)Expand description
Rasterise mask into out (one coverage byte per pixel of a w×h buffer) — the CPU twin of
shaders.rs::MASK, so preview and export agree. scale = buffer px per project px, centre =
the layer centre in buffer px.