Decoder -> Encoder?

[jamesosaurus]

Is there a standard way of writing out a png that has previously been read in (presumably after some alteration)?

[fintelia]

There isn't one specific way. But something like this should be enough:

let img = io::Reader::open("original.png")?.decode()?;
// ... modify img ...
img.save("modified.png")?;

[jamesosaurus]

@fintelia Thanks for the reply. I am still a bit confused in that this seems like a different crate (image vs png). Unfortunately, I was specifically interested in the API in png due to metadata support. Sorry if I am missing the obvious- I am just learning Rust.

I am assuming that this discussion area is associated to https://docs.rs/png/latest/png/index.html as this is the repository linked to from there.

[fintelia]

Ah, sorry I missed that. The image crate just calls into the png crate, so if you're looking for a simple approach I'd recommend that. It is a bit more involved to use the png crate directly