Is java.library.path respected?

[StefanOltmann]

I want to use your lib in a Compose Multiplatform Desktop app.

Adding custom DLL files to the app directory (part of the path) is difficult, but I can add them to a app/resources directory.

I get a system property where this is located:
val resourcesDir = System.getProperty("compose.application.resources.dir")

I try to modify java.library.path to get the lib loaded, but this seems not to work.

        System.setProperty(
            "java.library.path",
            System.getProperty("java.library.path") + ";$resourcesDir"
        )

Do you have any idea how I can make this work here?

[lopcode]

I haven't tried loading from java.library.path, but I would expect it to work - here are some things that might help debug:

• The code that sets where vips-ffm looks for symbols: https://github.com/lopcode/vips-ffm/blob/main/core/src/main/java/app/photofox/vipsffm/jextract/VipsRaw.java#L59 - first, it tries the system path, then falls back to SymbolLookup.loaderLookup() which I would expect to be able to load things from the classpath
• There are three DLLs you'll need on the path - libvips, glib, and gobject
• Every operating system has different opinions about what libraries should be named - this is the GitHub Action that checks the Windows build, you could double check the filenames are identical to a "known good" build using the system path: https://github.com/lopcode/vips-ffm/blob/main/.github/workflows/checks.yml#L78

It could be that we need to modify the loader in VipsRaw to allow java.library.path fallback - I'm open to a Pull Request if you figure out that's what's needed.

Good luck, let me know how you get on!

[StefanOltmann]

Thank you for the fix and your support! 😊

According to my tests VIPS is about 4x faster at generating thumbnails compared to Skiko (the SKIA wrapper)! 🚀

I'll be incorporating your library into the next release of Ashampoo Photo Organizer.

The base app is free, with advanced features available via a subscription plan. If you're interested, I'd love to gift you a license. :)

Maybe you find some inspiration for PhotoFox. ;)

[lopcode]

Looks great! Glad it's performing well for you, that sounds similar to performance improvements others have shared too, which is nice to confirm.

And yes I'd happily accept a license to play around with the product - I made an account with the email ashampoo@the website in my GitHub profile.com 🙂

[StefanOltmann]

Yes, VIPS is truly amazing. :)

Unfortunately, the publishing team just informed me that they’re unable to sign my EXE file. The error code suggests it might be related to this issue: JDK-8326447. I was on Java 17 before and tried to update to Java 22.

As a result, the update including VIPS and faster thumbnail generation will be delayed a bit. Quite disappointing. :(

On the bright side, I’ve just sent you your free license! :)

[lopcode]

Got it, thanks!

Hope the signing issues get resolved soon 🤞

[StefanOltmann]

In the meantime, I’m glad to have vipsthumbnail. I can run it from the command line for now and it’s even faster than SKIA. That'll be in the next update.

The vips-ffm integration is currently on hold in a branch, ready to go live as soon as Oracle gets their act together.