Copy contents of canvas and send to shopping cart Options

[baileycooper]

Hi,
Apologies if this is in the wrong place, or if it's just a stupid question. I'm a novice coder and I'm struggling with a problem that someone might be able to help with...

I have code that creates a 'canvas' on a webpage and adds graphics/text to it using input from the user.
The problem I have is this: How can I create a copy of the canvas contents (as a graphic or some other format) that I can then pass through to a shopping cart system?
I just don't know how to start with this so any help is really appreciated.

Many thanks - and apologies again if I've messed up by posting here.