i need a extension (may be custom)

i need a extension that the customer can select the part of the image that he want that i print in the proportions that he want, like this web

https://www.muraldecal.com/en/wall-mura ... attan-9387

anybody can made it?

You must be use OpenCart Custom Product Designer. OpenCart Product Designer is a perfect product customization tool for the OpenCart E-Store owners.

If you do not have an OpenCart Ecommerce Store and wish to have one, just provide us with your list of requirements. They will develop your e-store from scratch and integrate it with their OpenCart Product Designer.

I recommend you to try thehttp://store.ogeninfo.com/product/openc ... extension/ for Opencart is beneficial for printing businesses or selling custom-designed products.
https://www.store.ogeninfo.com/ has a collection of powerful and latest technologies plugins, extensions, and Scripts that are build to uplift the digital presence to the next level.
If you do not have an OpenCart Ecommerce Store and wish to have one, contact https://www.ogeninfo.com/. we will develop your e-store from scratch.