Being able to draw inside a module ?

Being able to draw inside a module ?

I was wondering if anyone know of a solution for this request.

We would like to be able to draw directly from one module in the CRM and have it attached to that record.

Here is an example.

Paul would go to the customer once he as done the measuring, he would draw inside that customer record a plan. We would like that plan to attach itself to that record.

Right now, they do this paper form and attach the image. Would be nice to have a widget or something that does this.

Not sure if any one as solution around or is it something we would need to build ourselves.