The Gravity Payments EasyIntegrator API makes adding signature capture to your application easy. You do not have to interface with the signature capture device directly. The API handles all communications with the device including the card swiper and all user prompts.
The signature is returned at the end of a transaction as string along with the usual properties like card type, masked account number etc. You can then use the included functions to convert the string back into an image for printing or simply to display it.
Workflow specific to signature capture