So I just read about [this image](https://mobile.twitter.com/UniverseIce/status/1266943909499826176) that, if set to wallpaper on certain devices, causes system UI to crash.
From what I gathered from the replies, it’s because the phones can’t display the picture color range and it causes them to crash, but I’m really curious how that’s even possible. Everybody uses nomenclature I’m not familiar to talk about the details and I can’t make anything out of it, so I thought you guys might help.
So, what’s exactly happening in those phones? Is this a file format issue? What’s up with the color difference, isn’t there some sort of universal color coding across formats and devices? Why does it crash your phone instead of displaying the closest color it’s capable of, or just showing an error altogether? Would it still crash your phone if you were to simply look at it, without setting it to wallpaper?
I hope somebody can explain what’s going on there! Thanks a lot in advance.
In: Technology
I’ve seen mrwhosetheboss make a really good (https://youtu.be/iXKvwPjCGnY) about this.
The cause is that it’s in a different colour spectrum to the one our phones can display. While it tries to convert it to the phone’s colour spectrum phones have a bad way of rounding up the colours so instead of having a total of 365, the total becomes 366
> So, what’s exactly happening in those phones? Is this a file format issue?
No
> What’s up with the color difference, isn’t there some sort of universal color coding across formats and devices?
There are multiple color spaces, and this image uses an odd, fancy one with a higher range of colors than usual. The phone is attempting to convert it to the standard for display, and getting it wrong, because a calculation goes out of range.
> Why does it crash your phone instead of displaying the closest color it’s capable of, or just showing an error altogether?
Just a coding mistake, really. Showing an error probably wouldn’t help.
> Would it still crash your phone if you were to simply look at it, without setting it to wallpaper?
No, it shouldn’t.
It’s like this: a phone has a bunch of apps on it, the gallery, the calculator, etc. If any of those crash nothing terrible happen: they just close.
But, the thing that shows your desktop, the background, and that you start applications from is also an app of sorts. And if that crashes, you’re screwed, because that’s the way you have to interact with your phone. And since the problem is with the background, the problem happens as soon as the background appears. Restarting it wouldn’t help because it’d just go and immediately crash again.
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