docs: private void mapAbsoluteToRelative(float[] destPoints, float[] srcPoints, int numPoints) {
      for (int i = 0; i < numPoints; i++) {
        destPoints[i * 2 + 0] = (srcPoints[i * 2 + 0] - mImageBounds.left) / mImageBounds.width();
        destPoints[i * 2 + 1] = (srcPoints[i * 2 + 1] - mImageBounds.top)  / mImageBounds.height();
      }
    }