I'm again on a script that simulates a lens on the screen, >here my previous effort that works quite well but only in one mode, that is: it magnifies the area around the mouse while you move it and it shows the zoomed area into the "lens" window that stays somewhere on the screen.
In the new mode that I would like to achieve, should be magnifyed the area that lies behind the "lens" window and when you move that window it should magnify what's behind it.
Unfortunately here arises the problem, the magnifier magnifies itself recursively, (because it capture the surface of the "lens" itself