I'm trying to add a default avatar service to my static site. Think something like Jdenticon, except it's written in Rust and compiled to WebAssembly. What matters here is the PNG it generates is exposed to JavaScript as a UInt8Array.
To follow along with the next paragraph, you might want to look into the astro:assets package. Specifically, internal.ts and the files in the services folder.
As far as I can tell, Astro's LocalImageService uses a Uint8Array internally for the transform function, as that's what it passes into the Sharp constructor method. However, this is obscured by getImage only taking an UnresolvedImageTransform, which basically requires a string/ESM import for the ImageMetadata.
I can't, however, figure out how to either directly pass in a Uint8Array or how Astro calls the transform function in the first place. Where does it load the image into memory?
The most probable answer to my dilemma would be, I think, to either first save the image to disk and then pass the file path to getImage (though this is... very undesirable if at all avoidable) or to create my own image service wrapping sharp — yet I still don't understand how this would work. Would someone kindly explain to me some of the best ways to solve this, or why current issues within Astro prevent this?
It's probably worth linking withastro/roadmap Discussion #679 - Image as Buffer.
