SUMMARY I've upgraded from 8.6.0 to 8.7.0. Since then, Lut3Ds do not show any effect. Neither the preview, nor apply, nor save. STEPS TO REPRODUCE 1. Edit an image (F4) 2. Open the "color effects" tool 3. In the tool choose from the dropdown "Type": "Lut3D" 4. Pick a LUT, make sure intensity is not "0%" 5. Observe there is no effect applied, by moving mouse on image and on tool. OBSERVED RESULT EXPECTED RESULT SOFTWARE/OS VERSIONS Windows: macOS: (available in the Info Center app, or by running `kinfo` in a terminal window) Linux/KDE Plasma: KDE Plasma Version: KDE Frameworks Version: Qt Version: ADDITIONAL INFORMATION
The Lut3D plugin works without issues here. Which digiKam version are you using? If it's an Ubuntu Snap package, use our AppImage. Maik
I use the debian package installed locally. In case it matters: I don't have KDE as a desktop. The exact version is: 4:8.7.0-1
Are any binary digiKam packages missing from the installation? Typically, there should be a folder "/usr/share/digikam/data/lut3d" with PNG files. Please check. Maik
Wait, they're now webp images. The most likely cause is that you don't have the KImageFormat plugins installed. This plugin is required for QImage to load these images. Maik
I just installed: kimageformat-plugins: 5.116.0-1 and kimageformat6-plugins: 6.13.0-2 But nothing changed. A working workaround is to convert the webp images to png.
As i know the Webp support must be compiled in Qt core. KImageFormat do not have an extra plugin code for Webp, all is delegate to the Qt core. List of codec source codes from KImageFormat (no webp stuff): https://invent.kde.org/frameworks/kimageformats/-/tree/master/src/imageformats?ref_type=heads README from KImageFormat (no webp stuff): https://invent.kde.org/frameworks/kimageformats/-/blob/master/README.md?ref_type=heads So, when Qt is configured before compiling, libwebp-dev must present and detected. Best regards Gilles Caulier
Doc from Qt about image formats supported (webp is present): https://doc.qt.io/qt-6/qtimageformats-index.html Gilles Caulier
Okay, WebP is part of Qt, and we've actually converted many PNG graphics to WebP. But then you shouldn't see the splash screen images, for example? Maik
Yes, I also do not see any splash screen.
Ok, you need to report the problem to Debian, they need to build Qt with Webp support. Maik
Filed upstream as https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1116194