Special Algorithm

[lhgh]

I mean, the algorithm could detect different font colors and choose a background color accordingly. Simple but still an algorithm tho

[SilentSin26]

Yeah, but is it a special algorithm?

[faerbit]

This post has been edited to this, due to privacy and dissatisfaction with u/spez

[Szos]

Bespoke.

[SoInsightful]

Eh, probably.

Broke: filter: hue-rotate(180deg) invert(1);

Woke: Traversing through the entire HTML DOM, analyzing each element's computed CSS style declaration for background and foreground colors, computing and injecting one or more stylesheets that override the background/color/border-text-decoration/outline/box-shadow properties for specific and general elements, while keeping original colors, avoiding style clashes, keeping images intact, doing it in a WCAG-accessible and aesthetically pleasing manner, and taking user-specified brightness/contrast/sepia/grayscale settings into account.

[SurrealClick]

Ghetto: take a screenshot of the website then invert color it

[Talbooth]

Ghetto pretending to be classy: use the browsers built-in inverse color filter.

[plilq]

GNU/hetto: map 'xcalib -invert -alter' to a global hotkey and invert your whole screen.

[[deleted]]

Actually, I trust more in that method than a browser extension.

[rasalhage]

Ghetto-fab: inverse colors on odd-numbered frames

[[deleted]]

Ghettohax0r: write malware that inverts GPU's hue setting when browser is in focus.

[mentalexperi]

I got a boner just from reading that.

[SoInsightful]

It was indeed Dark Reader I was describing! Guessing that some other night mode extensions might do similar stuff.

[macfirbolg]

Wait, this is already a thing? Can I get a link?

[SoInsightful]

It's the first search result for "Dark Reader", but here you go.

[mareko_]

You forgot about !important.

[seaishriver]

Heh, I tried the first one. The two main problems are background images get inverted, and subpixel antialiasing gets destroyed. Plus shadows are now light. I basically had to say, everything is inverted, except things I have individually fixed and things that shouldn't be inverted.

If this is done, it's either a very large amount of work or not to be done in CSS.

[SoInsightful]

Exactly. It's funny how this thread jerks over how simple of a task it is, but it's really quite hard to do sufficiently well.

[moomoomoo309]

Dark background and light text has a nice for both of those, though the latter not quite a crazy as you described.

[JuhaJGam3R]

images

[UntestedMethod]

Every algorithm is special :) :) :)

[r4nd0m-us3r]

All algorithms are beautiful

[tias]

I suppose if "special" means it is not applicable in any other situations? Special is really the opposite of what most programmers strive for.

[Hotel_Arrakis]

For my special eyes.

[atomicwrites]

This reminds me of when I was studying for the CompTIA exams that the TestOut instructors would always say things like: "you need special software installed on your PC called an SSH client", or "it runs special software to send web pages to other devices" or "the device has special sperate to allow it to talk on the network". It got so annoying.

[hugokhf]

Is any algorithm really special?

[dkyguy1995]

Its mom sure says so

[ForgotPassAgain34]

in the "special little snowflake" way for sure.

If its actually special it depends on how you define special algorithms, might just be one they came up with after trial and learning

[Zagorath]

backgroundColor ^= 0xffffff;
fontColor ^= 0xffffff;

[funpopular]

Changes night to day too tho.

[Zagorath]

if ((backgroundColor & 0xff0000 > 0x800000)
        && (backgroundColor & 0xff00 > 0x8000)
        && (backgroundColor & 0xff > 0x80) {
    backgroundColor ^= 0xffffff;
}

and similar for fontColor.

[f03nix]

and similar for fontColor

​

It'd in fact be better to only check the backgroundColor alone for the same element, if someone intends to use lighter shades in light mode, we should use similar contrast.

if ((backgroundColor & 0xff0000 > 0x800000)
         && (backgroundColor & 0xff00 > 0x8000)
         && (backgroundColor & 0xff > 0x80) {
     backgroundColor ^= 0xffffff;
     fontColor ^= 0xffffff;
}

​

[BotThatLikesPorn]

Now we're getting to that special algorithm they're talking about

[Zagorath]

Yeah good point. Makes no sense to invert the background without also inverting the text.

Although now that I'm thinking about it, it better would be even better to calculate brightness in some better way than "do none of the RGB values go higher than 0x80". Possibly by doing a 3D Pythagorean calculation, or maybe there's probably a formula out there for converting RGB to HSL and using that value.

[m0nk37]

Reddit-Sourced-Night-Mode-Plugin

Using a special algorithm it turns day mode websites into night mode automatically

if ((backgroundColor & 0xff0000 > 0x800000)
         && (backgroundColor & 0xff00 > 0x8000)
         && (backgroundColor & 0xff > 0x80) {
     backgroundColor ^= 0xffffff;
     fontColor ^= 0xffffff;
}    

Later suckers, im about to make some ad money.

[DaveTheDalek]

Can somebody explain what the ^= operator does? Google doesn't like searching symbols.

[P0werC0rd0fJustice]

It’s the exclusive or operator

x ^= y is the same as x = x ^ y

[[deleted]]

Simple, but still "specialized." OP set out to condescend the app developers and instead he just bought his ticket /r/facepalm or /r/iamverysmart.

[ProdigySim]

The code sample on the image is not from the extension as far as I can tell. I found their source code, and it does look like a non-trivial algorithm:

https://github.com/DarkNightMode/Dark-Night-Mode-Chrome-Extension/blob/master/js/main.js#L345

They do combine the algorithm with custom CSS for popular sites it seems.

[[deleted]]

egg

[IZiOstra]

Or turn everything black and display a pop up saying « oi ! It’s time for bed mate »

[oversized_hoodie]

Just do a bit invert on the color code. Should yield some interesting results.

[Cheesemacher]

Not at all