Add Grayscale and Inverted framebuffer configurations to Image Adjustments + CLI

[autolyticus]

I'm not sure if you consider that this falls within the purview of BetterDisplay or not, but I believe it would be a useful feature for BetterDisplay to allow controlling the "Color Filters" feature in Accessibility.

As a dev, I would love the ability to script toggle and untoggle grayscale to serve as a subtle reminder for me to remind myself to take a break. (Right now I'm using the native Shortcuts app for this)

As a user, I expected to find it under System Colors > Color Filters

Ref: As mentioned on the Discord :)

[waydabber]

https://discord.com/channels/903276571773771796/903276571773771799/1215723957110706250

Sure. I can add color remap to grayscale (and invert) feature (will implement it for Apple Silicon).

[waydabber]

Since these modify the framebuffer color mapping at a low level, you'll need to hold the OPTION button while opening Image Adjustments to reach these features. Reading the current value does not work well on external displays so this will be a simple clickable four-state setting (four optionally appearing menu items).

[waydabber]

The associated CLI is a command so you need to use perform

Set all displays to grayscale, inverted, both, normal:

betterdisplaycli perform -grayscale
betterdisplaycli perform -inverted 
betterdisplaycli perform -invertedgrayscale
betterdisplaycli perform -normal  

Set a specific display only:

betterdisplaycli perform -namelike=MyDisplay -grayscale

[waydabber]

https://github.com/waydabber/BetterDisplay/releases/download/v2.0.0-pre-release/BetterDisplay-v2.3.0-b27469-pre.zip

[waydabber]

I renamed the CLI parameters to these:

standardFramebuffer
invertedFramebuffer
grayscaleFramebuffer
invertedGrayscaleFramebuffer

[autolyticus]

This is perfect for using on my eink display. I don't need to have a dark and light theme and I can just set my display to be inverted.

This is great! Thanks!