☰

HN Avatars in 362 bytes

Annotated avatars on all HN comments.

As of 2022-03-18. See the latest version.

نووسەر
libele
Ratings
0 0 0
وەشان
1.0.4
Created
2022-03-15
Updated
2022-03-18
Size
1023 Bytes
مۆڵەت
نییە
Applies to

HN Avatars in 357 bytes by tomxor

The concept is to use HN usernames as the seed into a deterministic avatar generator. This generator is built from the famously simple xorshift32 PRNG, which both provides a random variable for the image generator steps, and "pseudo-hashes" the seed string to provide the initial PRNG state using a non-linear step (adding each codepoint - which is likely not very robust against collisions compared to proper hashing algorithms, but is simple and good enough).

Golfed version, prettified to comply with GreasyFork rules. Thanks to hawski, lekevicius, toqy and z3c0 for additions!

v1.0.3: 362 bytes
v1.0.4: 396 bytes

for(u of document.querySelectorAll('.hnuser,#me'))for(u.prepend(c=document.createElement('canvas')),x=c.getContext('2d'),c.width=18,c.height=14,c.style.imageRendering='pixelated',s=u.innerText,r=1,i=28+s.length;i--;i<28?r>>>29>X*X/3+Y/2&&x.fillRect(6+2*X,2*Y,2,2)&x.fillRect(6-2*X,2*Y,2,2):r+=s.charCodeAt(i-28,x.fillStyle='#'+(r>>8&0xFFFFFF).toString(16)))r^=r<<13,r^=r>>>17,r^=r<<5,X=i&3,Y=i>>2