Dump Nintendo Logo

[binkinator]

I’m researching how to dump graphics from the FW files. Specifically looking to dump the black&white Nintendo Logo.

I got the following hint last night from friedkeenan (author of switch-logo-patcher) on Discord:

yeah I need to make a script to do it for you but that requires effort
but basically at the offsets listed by <https://github.com/friedkeenan/switch-logo-patcher/blob/master/gen_patches.py#L9=L31> (the last entry is for the most recent FW version) there are `0x69460` bytes (`308 * 350 * 4`) of RGBA data that correspond to the switch logo
and you can dump that and convert it to a PNG or something and then use it

Using this hint I was able to find the repeating “00 00 00 FF“ section in the Amosphere 1.3.2 version of package3.

It was at offset 1716480 as shown in this line of VI patches:

"AFEAACF3E88AB539574689D1458060657E81E088": 1716480,

Was also able to confirm that gen_patches.py fills those blanks in with the data from a 308x350 PNG file I provide the script.
The script converts the PNG image to RGBA.

I want to find the original Nintendo Logo in the firmware though…

I’ve gotten the exefs and romfs files from the latest 14.1.1 firmware .nca files via hactool using this site as a guide.

Here are my slightly modified commands to dump everything.

find . -name "*.nca" -exec hactool -t nca --exefsdir {}_exefs --romfsdir {}_romfs {} \;

find . -name "main" -exec hactool -t nso0 --uncompressed {}_nso {} \;

Now I have a sea of data and don’t know where to start looking for a raw image file encoded in some binary somewhere.

Any hints?

Am I even on the right track?

 

[binkinator]

By the powers invested in me...by nobody in particular...I give you...

THE ORIGINAL NINTENDO BOOT LOGO!!!!!!!
(this one is extracted directly from the firmware.)

Never been so happy to see a god damn Nintendo logo in my god damn life!

Thanks to the folks at #ReSwitched
friedkeenan, Behemoth, shchmue, Anteries, Retroid, TSR Berry for tolerating my n00bness and walking me through everything.

Tut on how to extract it yourself will follow shortly...
(might even put together a small script and submit a PR...who knows.)

 

[impeeza]

waw man, was a great journey, kudos!!!

 

[binkinator]

Posted the write-up here.