use wasm_bindgen::prelude::*;
#[wasm_bindgen]pub fn blur(pixels: &mut [u8], w: u32, h: u32, radius: u32) {    // a box blur, run horizontally then vertically    let mut tmp = pixels.to_vec();    for _ in 0..2 {        box_pass(pixels, &mut tmp, w, h, radius, true);        box_pass(&tmp, pixels, w, h, radius, false);    }    // runs at near-native speed}

import init, { blur } from '../pkg/blur';
export function BlurCanvas({ radius }: { radius: number }) {  const ref = useRef<HTMLCanvasElement>(null);  useEffect(() => {    init().then(() => {      const ctx = ref.current!.getContext('2d')!;      const img = ctx.getImageData(0, 0, 640, 360);      blur(img.data as unknown as Uint8Array, 640, 360, radius);      ctx.putImageData(img, 0, 0);    });  }, [radius]);  return <canvas ref={ref} width={640} height={360} />;}