Enhancement: expose libvips magicksave, requires v8.7.0

[naz]

Currently, there's lack of support of .gif format by the library, but it will be supported by underlying libvips in v8.7.0 (see release notes for https://github.com/jcupitt/libvips/releases/tag/v8.7.0-rc1 and https://github.com/jcupitt/libvips/issues/839 libvips magicsave for .gif output).

We integrated sharp in Ghost lately and would be lovely to have gifs support for our image uploads
(TryGhost/Ghost#9848)

Cheers Lovell! And let me know if I could be helpful in testing etc.

[lovell]

I expect the forthcoming sharp v0.21.0 to provide a prebuilt libvips v8.7.0.

There will need to be a code change in sharp to support the forthcoming *magick save feature of libvips.

The prebuilt libvips binaries provided by sharp do not include *magick. To take advantage, you will need to compile your own libvips with support for *magick and install it globally before installing sharp.

[hbakhtiyor]

hi @lovell, since the version already released, there are any apis for manipulating (like adding frames, setting gif options) with gif files?

[lovell]

@hbakhtiyor No, not yet. Happy to accept/help with a PR if you're able.

[hbakhtiyor]

don't know c++

[adityapatadia]

Does this mean if libvips is compiled with *magick, it will work out of the box with sharp? @lovell it would be great if you can elaborate which features are available out of the box and which features will need some code modification in sharp.

[lovell]

@adityapatadia This issue exists to track the future possible work required to expose libvips' magicksave feature; it will not work "out of the box".

[adityapatadia]

Okay then I think I would wait for it. Libvips 8.8 has save GIF as WebP feature as well. It would be great to have the same in Sharp as well.

[deftomat]

@lovell Any news on this?

I can try to create a PR as this is currently a blocker for us. However, a small hint to point us into the right direction could really help 😉