a work-in-progress C API.
tracking can be disabled by setting seq to a negative value.，详情可参考新收录的资料
if val < lo { return lo; }，推荐阅读新收录的资料获取更多信息
When you choose an image, Canva’s photo editing features let you adjust the photo’s settings (brightness, contrast, saturation, etc.), crop, or animate it.