I can't seem to find a complete solution for this and I also wonder why it isn't an option included in the library? Anyways, could someone help me out with this? I need to create a stacked bar chart with both positive and negative values. Rounded only the top and bottom parts. Also, some data points could be 0.

Here is the closest I came up with from various examples.

https://jsfiddle.net/uffo/5oty49r3/6/

And here is what I need to achieve

Any help would be much appreciated :)