def filter.convolve

gralha-svg-render@0.1.0.1 · svg.bend:4640

import Base
import gralha-image@0.1.0.1/image.bend as Img

4640def filter.convolve(xs: List<&2, FilterTap>, +input: FilterInput, +p: Point, +linear: Bool, acc: Img.Color) -> Img.Color:
4641  match xs:
4642    case Nil{}: acc
4643    case Con{FilterTap{delta, weight}, rest}: filter.convolve(rest, input, p, linear, color.add(acc, color.fade(filter.input.color(input, point.add(p, delta), linear), weight)))