Add an image comparison option for "Difference (Inverted)"

[NilsEnevoldsen]

The feature request

Image comparison type "Difference" can look unnaturally inverted in some contexts, especially when comparing black-on-white diagrams and seeing a white-on-black difference (or the other way around). Add an image comparison option for "Difference (Inverted)".

Proposed solution

The current image comparison type "Difference" is mix-blend-mode: difference; on the current image.

I propose adding a similar image comparison type which additionally applies filter: invert(1); to the parent container. I am not sure if there is a way to get this effect by applying a filter or blend mode to the current image alone. There may be.

Additional context

2-up:

Difference:

[Proposed] Difference (Inverted):