Add white-point configuration option to BetterDisplay XDR (native rightness upscaling) preset

[nimo23]

Hello,

Please provide another menu group called White Source where the user can adjust the white sources of the current display profile. The menu group can have following mutual selections:

• D65 Light Source
• D50 Light Source
• TL84 Light Source (typcial for European office environments)
• CWF Light Source (typical for American office environments)
• Custom Light Source (the user can define a white source)

Please read here for more information: https://www.chnspec.net/difference_light_sources.html. A quote from this link:

High color temperature: Can increase people's alertness and attention, but staying in a high color temperature environment for a long time may cause visual fatigue and mental tension.For example, in a library, a color temperature close to natural light of 5000K may be chosen during the day to facilitate readers' reading and learning;

while in the evening, to avoid readers being too awake and having difficulty falling asleep, a low color temperature lighting of around 3000K may be adjusted.

I looked at my old Intel Macbook Air and it defaults to D50 (which isn't as bright a white point as d65). Apple has switched to D65 on newer MacBooks and therefore the white point is brighter.

The new White Source-adjustments in BetterDisplay can also help to provide presets for #4040. For example, D50 Light Source should be the standard for office environments..

[waydabber]

If I understand properly, this would be some fixed presets for the Temperature slider, maybe with the tweak that the app should use the current color profile to get the native white point and calculate some other white point based on that?

Note that white point can be changed using user calibration and custom presets/color profiles can be created in macOS and easily switched in the app menu, so this should be a feature available in macOS by default:

For non-XDR displays:

For XDR displays:

[nimo23]

so this should be a feature available in macOS by default:

Yes, unfortunately Apple prohibits changing brightness and using NightShift after using a (custom) display profile other than XDR.

[waydabber]

Oh, I see. In this case I could add a feature to further configure the BetterDisplay XDR Preset.