How can I capture cursor information separately using NvFBC APIs on Linux?

As per the documentation of NvFBC v8.0.4, I can see that it is possible to capture cursor images as a part of frames grabbed from the Linux desktop. Also, there is an option to disable cursor image capturing into the frames grabbed.

But as per our requirement, Instead of capturing frames with cursor images on the server-side, I want to capture the cursor information and frames separately and combine them on the client-side while rendering.

Unfortunately, I’m unable to find the NvFBC API which can grab the cursor information only.

Please help!