Change additional output type & skip empty optional arguments

[akash-akya]

• Change type of additional output values to map from keyword list
• Skip empty optional argument from function definition when the operation does not have any

Hi @kipcole9! I am making few breaking changes, if possible can you check if this breaks Image?
Btw, I also made few other changes in the master - #103. Notably, added limited math operators similar to Image :)

[kipcole9]

@akash-akya, I tried image with vix master branch and all tests pass without change. So far so good! I will very happily ditch my math operators in favour of yours - but I haven't tested that yet.

[akash-akya]

Thanks for quick check!

I will very happily ditch my math operators in favour of yours - but I haven't tested that yet.

👍🏼. Makes sense to just wait a bit more for it to be stable. I am thinking if we need something like Nx.Defn, but not finding strong reason to add that complexity yet.

[kipcole9]

TLDR; Some small incompatibilities I can work around.

I spoke too soon because I tested on master before you merge. Some small issue I can easily work around.

• Operation.find_trim/2 now doesn't return flags as the last element in the return tuple (easy fix for me, no issue)
• Vix.Vips.MutableOperation.draw_line/7 is now Vix.Vips.MutableOperation.draw_line/6 which should be easy to work around
• Operation.profile/1 now doesn't return flags in the return tuple - also easily worked around in my code.

There is one other failing tests but the cause is not immediately clear. It is coming from Image.skew_angle/1 meaning its either Operation.fft or Operation.project that has a different return type I have to investigate.

[akash-akya]

I see. Let me know if you need any help with that, I can create a PR.

There is one other failing tests but the cause is not immediately clear. It is coming from Image.skew_angle/1 meaning its either Operation.fft or Operation.project that has a different return type I have to investigate.

It should be project, same as point one. Previously we returned empty list as last value, now we don't

[kipcole9]

All good Akash, they are easy fixes and a cleaner API so happy to push another Image release when you ship yours.

Do you have a view on when you please to release this version of Vix?

[akash-akya]

Well then nothing is pending from my side, I'll create a release now.

[kipcole9]

Sounds good, I'll get my lib back in shape after you publish and do the same. Glad you're still motivate by working on vix - its an amazing library and, if I can say, beautifully done.

[akash-akya]

Thanks! Yes, still have a lot of motivation, only wish I had more time to spare, anw I'll complain about time some other day.

Few things I have on my mind in no order:

• I want to add support for VipsRegion which should make certain tasks very efficient (such as machine learning). Some details about this here: Most efficient region reading from tiled multi-resolution tiff images libvips/pyvips#100

• A lot of improvement needed on documentation/cheat sheet/tutorial/livebooks side. This will be a good exercise for me as well. This is something I can try to learn from your libraries for sure.

• Add support for blocking image operations: https://www.libvips.org/2022/05/28/What's-new-in-8.13.html

• Explore the possibility of improving discoverability of libvips operation, while keeping it maintainable.

I am open to some other important changes as well if you have something on mind.

[akash-akya]

@kipcole9 v0.17.0 is released 🎉

[kipcole9]

I'm very interested in where to you get to with those "roadmap" items - very interesting!

image 0.29.0 is published now with support for vix 0.17.0.