Lockscreen that just shows current app screen?

Hello, I'm wondering if there is a tweak that would make the lockscreen just show the screen of the current app? For example, if I am using Google Maps and I lock the phone, when I press the home button, I want the Google Maps screen to be the background of the lockscreen.

I basically want to be able to press the home button and see whatever I was doing last without having to unlock at all.

Any ideas?

Thanks

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