squoosh/src/codecs/resize/processor-sync.ts

import { nativeResize, NativeResizeMethod, drawableToImageData } from '../../lib/util';
import { BrowserResizeOptions, VectorResizeOptions } from './processor-meta';
import { getContainOffsets } from './util';

export function browserResize(data: ImageData, opts: BrowserResizeOptions): ImageData {
  let sx = 0;
  let sy = 0;
  let sw = data.width;
  let sh = data.height;

  if (opts.fitMethod === 'contain') {
    ({ sx, sy, sw, sh } = getContainOffsets(sw, sh, opts.width, opts.height));
  }

  return nativeResize(
    data, sx, sy, sw, sh, opts.width, opts.height,
    opts.method.slice('browser-'.length) as NativeResizeMethod,
  );
}

export function vectorResize(data: HTMLImageElement, opts: VectorResizeOptions): ImageData {
  let sx = 0;
  let sy = 0;
  let sw = data.width;
  let sh = data.height;

  if (opts.fitMethod === 'contain') {
    ({ sx, sy, sw, sh } = getContainOffsets(sw, sh, opts.width, opts.height));
  }

  return drawableToImageData(data, {
    sx, sy, sw, sh,
    width: opts.width, height: opts.height,
  });
}