Function resize

plugins/plugin-resize/src/index.ts:80–127

* Resizes the image to a set width and height using a 2-pass bilinear algorithm * @example * ```ts * import { Jimp } from "jimp"; * * const image = await Jimp.read("test/image.png"); * * image.resize({ w: 150 }); * ```

(image: I, options: ResizeOptions)

   * ```
   */
  resize<I extends JimpClass>(image: I, options: ResizeOptions) {
    const { mode } = ResizeOptionsSchema.parse(options);

    let w: number;
    let h: number;

    if (typeof options.w === "number") {
      w = options.w;
      h = options.h ?? image.bitmap.height * (w / image.bitmap.width);
    } else if (typeof options.h === "number") {
      h = options.h;
      w = options.w ?? image.bitmap.width * (h / image.bitmap.height);
    } else {
      throw new Error("w must be a number");
    }

    // round inputs
    w = Math.round(w) || 1;
    h = Math.round(h) || 1;

    if (mode && typeof Resize2[mode] === "function") {
      const dst = {
        data: Buffer.alloc(w * h * 4),
        width: w,
        height: h,
      };
      Resize2[mode](image.bitmap, dst);
      image.bitmap = dst;
    } else {
      const resize = new (Resize as unknown as Constructable<ResizeClass>)(
        image.bitmap.width,
        image.bitmap.height,
        w,
        h,
        true,
        true,
        (buffer: Buffer) => {
          image.bitmap.data = Buffer.from(buffer);
          image.bitmap.width = w;
          image.bitmap.height = h;
        }
      );

      resize.resize(image.bitmap.data);
    }

    return image;
  },

  /**
   * Uniformly scales the image by a factor.