| Summary: | Build qt5-image-formats-plugins with JP2 support | ||
|---|---|---|---|
| Product: | [KDE Neon] neon | Reporter: | geisserml <geisserml> |
| Component: | Packages User Edition | Assignee: | Neon Bugs <neon-bugs> |
| Status: | RESOLVED FIXED | ||
| Severity: | normal | CC: | geisserml, jr, nate, neon-bugs, sitter |
| Priority: | NOR | ||
| Version First Reported In: | unspecified | ||
| Target Milestone: | --- | ||
| Platform: | Neon | ||
| OS: | Linux | ||
| Latest Commit: | Version Fixed In: | ||
| Sentry Crash Report: | |||
| Attachments: | Example JP2 image | ||
|
Description
geisserml
2021-08-28 19:50:27 UTC
It works for me though on Arch Linux - Dolphin shows preview for the test file and Gwenview can open and display it fine. Do you have jasper and qt5-imageformats installed? P.S. to my last comment: I have jasper, openjpeg2 and qt5-imageformats installed and it works for me. qt5-imageformats and libopenjp2-7 are both installed jasper has nothing to do with JP2 images, it's a package for configuring ext2/3. > It works for me though on Arch Linux
If it works on Arch, then maybe we should move the issue to Neon User issues?
The Krita issue just got fixed (see https://invent.kde.org/graphics/krita/-/commit/542dcd306e236ec776a81e389d0a601387739e48) Maybe the cause is similar for Gwenview and Dolphin? (In reply to Manuel Geißer from comment #3) > qt5-imageformats and libopenjp2-7 are both installed > jasper has nothing to do with JP2 images, it's a package for configuring > ext2/3. I am referring to https://github.com/jasper-software/jasper (https://www.ece.uvic.ca/~frodo/jasper/). On Arch Linux, qt5-imageformats depends on jasper. It looks like many distros have dropped jasper, but in the end Arch Linux still keeps it because the upstream jasper repo eventually merged the security and maintenance fixes. [1] Meanwhile, from [2] I guess Qt may still rely on jasper for JP2 support. I think you can try checking whether your system has libqjp2.so, such as searching in `/usr/lib/x86_64-linux-gnu/qt5/plugins/imageformats/`. If it cannot be found then maybe qt5-imageformats is built without JP2 support. [1] https://bugs.archlinux.org/task/64655 [2] https://github.com/qt/qtimageformats/blob/dev/src/plugins/imageformats/jp2/qjp2handler.cpp Thanks for these very helpful hints. Indeed, KDE Neon seem to have built qt5-image-formats-plugins without JP2 support. libqjp2.so is not present in the plugins directory. The image-related JasPer is not in Ubuntu/Neon, instead only [this jasper package](https://packages.ubuntu.com/focal/jasper), which had confused me first. What exactly are the concerns about JasPer? As of 2021, it is actively maintained by the original author Michael Adams. There have been 8 releases this year, and the previous week's git history is full of commits. And JasPer seems to be fairly popular, too. I believe it is now actively maintained so I also hope that other distros can include JasPer again. See also: https://github.com/jasper-software/jasper/issues/208#issuecomment-665471904 Removed in Debian in 2016 due to security fears https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=818209 I've now added an update of jasper into neon https://build.neon.kde.org/view/1%20release%20%E2%9B%B0/job/focal_release_forks_jasper/ and rebuild qimageformats https://build.neon.kde.org/view/3%20unstable%20%E2%98%A3%20git%20master/job/focal_unstable_qt_qtimageformats/ And gwenview seems to show the attached file Mind you this is the first time in 20 years I've ever come across anyone using jpeg2000 :) Whoah, that was quick. Thank you! I just installed the two packages. Works perfectly in Gwenview and Dolphin now :) |