.

>>22936541 (OP)
120bits

>>22937029
bytes

>>22937049
this

i guess the 120 bytes are reserved for the filename, right?
120 bytes is 120 ascii characters, or 60 unicode characters

>>22937063
wut is this

>>22937049
Nibbles

>>22937063
header, footer, chunk layout, other metadata stuff idk
>>22937088
stop nibbling

>>22937097

>>22937075
well, a byte is 8 bits, and a bit (binary digit) is a digit with value 0 or 1, or 2 possible states
so a byte can represent 256 possible unique states (0000 to 1111), the same way a 4-digit combination lock can represent 10,000 possible unique states (0000 to 9999).
256 unique values is enough to contain all lowercase and uppercase letters, numbers, and some special characters.
this set of characters is called ascii.
a single ascii character, a single letter in my post, takes up 1 byte

a unicode character is different, it takes up 2 bytes.
2 bytes can represent one of 65,536 possible unique values (00000000 to 11111111), the same way an 8-digit combination lock can represent one of 100,000,000 possible unique values
65,536 different values is enough to contain basically every character from every language, which is what unicode is for.
the first 256 characters of unicode are ascii, meaning it contains the english alphabet as well as all sorts of kanji and cyrillic and shit.

i think filenames can be a max of 120 ascii characters, which is why an image with no filesize still takes up 120 bytes.

wait i fucked that up completely
>>22937101
>so a byte can represent 256 possible unique states (0000 to 1111), the same way a 4-digit combination lock can represent 10,000 possible unique states (0000 to 9999).

0000 to 1111 is 16 possible unique states
a byte is 00000000 to 11111111, which is 256 possible states
2 bytes would be 2 of those

>>22937097

>>22937101
>i think filenames can be a max of 120 ascii characters, which is why an image with no filesize still takes up 120 bytes
there's no limit defined by the png standard it's something the OS handles
you can read about it here if you really want to know what's in an empty png file
https://www.libpng.org/pub/png/spec/1.2/PNG-Structure.html

>>22937117
>there's no limit defined by the png standard it's something the OS handles
ye i know
>you can read about it here if you really want to know what's in an empty png file
>https://www.libpng.org/pub/png/spec/1.2/PNG-Structure.html
ah ty

>>22937106
I wish that was my arm

i figured any empty file uploaded to 4chan would be 120 bytes, because that's reserved for the filename

>>22937124
me too..

This thread scares and confuses me.

>>22936541 (OP)
too big