Not possible to retrieve the *aligned* written size?

[949f45ac]

When writing out from an encase Buffer via into_inner/as_ref getting e.g. a Vec<u8>, that inner structure has unaligned length (there might be padding missing at the end of it).
This makes it impossible to append anything to a GPU-side buffer after having written to it with encase-data once, because how will one know the next properly aligned offset?
Would be great to just have a get_(next_)offset function along the already existing set_offset on encase’s types.

[teoxoy]

For the dynamic buffer types you can keep writing, they have an internal offset that keeps increasing. .write(value) also returns the offset where the value was written to.