This seems really cool, but I don't understand the use cases. Someone help me out?

You can basically use this to generate Open Graph images programmatically for your websites really really fast (1-2ms)!

Here's a blog post detailing how this works (using @vercel/og): https://vercel.com/blog/introducing-vercel-og-image-generati...

eyelidlessness

Is the SVG->PNG portion of the show handled by Satori as well, or separately as a part of the Vercel service? Asking because I’ve got code handling that part for this exact use case, which I’d be happy to either eliminate if I can use Satori, or I could clean up and open source my own solution if people would find it useful.

leerob

The SVG -> PNG part is handled by @vercel/og. Specifically, it uses Vercel Edge Functions + WebAssembly to handle generating images at the edge.

https://vercel.com/docs/concepts/functions/edge-functions/og...

eyelidlessness

Thanks! Not to discourage anyone from using Vercel services if they’re interested (y’all are doing great stuff on this and lots of other fronts), but! I’d be remiss if I didn’t point out the unpublished-but-MIT-licensed repo I could find.

For anyone else who’s curious it looks like the pertinent source[1] can be self-hosted. I’m on mobile so I’m gonna limit my peering into the source, but it appears to wrap Chromium to do the PNG generation. Quite a bit different from my solution (which takes SVG-producing JSX and anything producing CSS, and renders to PNG with Sharp).

I’m curious how much overhead using Chromium adds, and whether alternatives like Sharp were considered.

1: https://github.com/vercel/og-image