Create custom Facebook share button to share canvas HTML5 as PNG image on Facebook

Need the following: Step 1: Create image from HTML [login to view URL] This is already possible. Step 2: Show png image on site and share it on Facebook. ONLY the image needs to be shared at Facebook, NOT the page itself. Instruction: People fill in their name with gravity forms. This creates a div with an image and there name inside the image (all is HTML). After that all the html inside that div needs to be converted to an image. After that the image needs to be shared on Facebook. So it needs to by dynamic since people are sharing different kinds of images on the thank you page of gravity forms. Information I found: [login to view URL] [login to view URL] [login to view URL] [login to view URL] [login to view URL]