Support for rotate images

[h2non]

Firstly, thank you for this package.

It would be great if you can introduce support for images rotation. It can be done in VIPS.
Here is the API doc:
http://www.vips.ecs.soton.ac.uk/supported/current/doc/html/libvips/libvips-resample.html#vips-similarity

I think this is the only significant nice-to-have missing feature in the package

[h2non]

Rotate implementation from sharp:
https://github.com/lovell/sharp/blob/master/src/resize.cc#L217

[DAddYE]

I will add it! Thanks!

[foresmac]

+1 on supporting rotation. I had planned to try and add support during our last hack days, but I ended up spending all my time working on my first Django ticket.

[h2non]

Due to personal requirements, I've created my own Go package called bimg, which is heavily inspired in sharp as well.

All of my proposed features are now supported in bimg:
https://github.com/h2non/bimg

[foresmac]

We'd certainly entertain the idea of using bimg instead, but I'd rather keep this issue open as long as @DAddYE is willing to explore adding support to vips.

[h2non]

@foresmac I completely agree with you.

[DAddYE]

Yes I'm gonna add the support soon, I'm working on trimming which is a feature that I need in another project and I'm also working on improving performances and cpu/memory reduction (1st priority)

[foresmac]

Any progress on this issue?