Function displace

plugins/plugin-displace/src/index.ts:29–44

* Displaces the image based on the provided displacement map * @param map the source Jimp instance * @param offset * @example * ```ts * import { Jimp } from "jimp"; * * const image = await Jimp.read("test/image.png"); * const map = await Jimp.read("test/map.png"); * * i

(image: I, options: DisplaceOptions)

   * ```
   */
  displace<I extends JimpClass>(image: I, options: DisplaceOptions) {
    const { map, offset } = DisplaceOptionsSchema.parse(options);
    const source = clone(image);

    image.scan((x, y, idx) => {
      let displacement = (map.bitmap.data[idx]! / 256) * offset;
      displacement = Math.round(displacement);

      const ids = image.getPixelIndex(x + displacement, y);
      image.bitmap.data[ids] = source.bitmap.data[idx]!;
      image.bitmap.data[ids + 1] = source.bitmap.data[idx + 1]!;
      image.bitmap.data[ids + 2] = source.bitmap.data[idx + 2]!;
    });

    return image;
  },
};