Zoom gesture on touchpad and screen would be really nice!

[srcodesmith]

Problem

I'm pretty used to "pinch-zooming" on tablets, smartphones, and even laptops running Windows, and I really miss this capability on your OS. I think this might be a LINUX-wide challenge, but I really find it to be one of the obstacles to refraining from dual-booting.
No idea how much of a challenge this might be, but it would be a valuable enhancement, at least on the touchpad, but ideally on the screen as well!

Proposal

Pinch zoom capability on touchpad and (touch-enabled) screens.

Prior Art (Optional)

No response

[jeremypw]

Gtk already theoretically supports "pinch zooming" and other multi-touch gestures and elementary currently uses this (optionally) to zoom the whole the desktop (see Settings/Mouse & Touchpad/Gestures). I couldn't get this to work inside an app though so there may be hardware/window-manager issues. Perhaps things will improve with Wayland/Gtk4.