What is the BEST way to zoom in on smartphones?

Question

Images

With the web version, everything is simple, when you click on the preview, display a modal window with a full picture and a url at the bottom if the picture is already completely larger than the screen, but on mobile it will become huge and will not fit into the screen, but what's the point of making it smaller if the user is his still fool around. Is it possible to make the picture pop up separately with the ability to rotate the screen the way it happens in the Gallery application? Please share info.