How to save or retain information about a drawn image

[kevinZartek]

I am developing a draw app, I need to finish a drawing after the user is done with. So i need to save or pass the values(like offsets, points, lines etc) don't we need a separate method for that like the save or draw methods.

[kevinmathew94]

My context is that I don’t need to save the canvas or frame as screenshots, I just need to analyze the data drawn.