public void setFlippedVertically(boolean flipVertically) {
    if (mFlipVertically != flipVertically) {
      mFlipVertically = flipVertically;
      applyImageMatrix(getWidth(), getHeight(), true, false);
    }
  }
Sets whether the image should be flipped vertically
core/src/main/java/com/theartofdev/edmodo/cropper/CropImageView.java