STEPS TO REPRODUCE 1. Open a tif file in Gimp git version, use it as background layer 2. Add other tif file as layer on the top of background layer 3. Right click on layer -> trans parency -> color to alpha 4. Save file as .xcf 5. Open this file in Digikam git OBSERVED RESULT File and/or thumbail are not displayed See attachment example image When I convert this file to .psd then to .xcf, Kimageformats can display it SOFTWARE/OS VERSIONS Arch Linux Qt 6.7.2 KF6 6.5 Gimp 2.99 fd3d547338 commit
Image link here https://www.dropbox.com/scl/fi/lm0xxqbofilvu65wvh6bp/jun16-3-color2alpha.xcf?rlkey=mw7blqojtw2zor1hfkc9ewgds&st=cq9dtojo&dl=0
Mirco is this something that you could have a look?
The plugin supports up to version 12 of the XCF format. We are now at 20 or 21 in GIMP 2.99 and they will continue to add features until the official release. Looking at it now doesn't make much sense. I just tried to remove the rejection based on the version number and the image loads although the result is different than in GIMP 2.99 (which is a good sign).
(In reply to Mirco Miranda from comment #3) > The plugin supports up to version 12 of the XCF format. We are now at 20 or > 21 in GIMP 2.99 and they will continue to add features until the official > release. Official Gimp 3.0 release is very near now, they don't add features: GIMP 3.0 Enters String Freeze https://x.com/GIMP_Official/status/1825949792821981472 > > Looking at it now doesn't make much sense. > > I just tried to remove the rejection based on the version number and the > image loads although the result is different than in GIMP 2.99 (which is a > good sign).
Fresh news core: Add version 23 to XCF switch statement https://gitlab.gnome.org/GNOME/gimp/-/commit/206273c6b5da01d42c816056afacf98b29c97e00
I found out why some XCF files/images created with Gimp 3 and later are not displayed in Digikam/KImage formats. Two causes. 1) Gimp V3 introduced "non destructive editing" This "non destructive editing" is not supported by KImageformats: if I uncheck "fx" (see Ofnuts explanations in forum link below) next the layer for images affected with issue, images are displayed normally, but i loose filter effect :( https://www.gimp-forum.net/Thread-Non-destructive-editing-in-Gimp3 https://www.gimp.org/news/2025/06/23/gimp-3-1-2-released/#non-destructive-editing 2) KImageformat can't handle "better compression" (zlib compression, i think) available in saving options.
I found another reason why KImageformats can't display some Gimp 3 XCF files inside Digikam 1) open tif file with Gimp 3. This file is displayed normally by Kimageformats inside Digikam 2) convert it to XCF format with Gimp 3 3) This file is no more displayed by Kimageformats
(In reply to maderios from comment #7) > I found another reason why KImageformats can't display some Gimp 3 XCF files > inside Digikam > 1) open tif file with Gimp 3. This file is displayed normally by > Kimageformats inside Digikam > 2) convert it to XCF format with Gimp 3 > 3) This file is no more displayed by Kimageformats To know: this issue doesn't happen with png and jpeg files
The current implementation of the plugin supports XCF files up to version 12 (GIMP 2.10 without zlib compression support). The plugin rejects all XCF files with versions greater than 12.
(In reply to maderios from comment #1) > Image link here > https://www.dropbox.com/scl/fi/lm0xxqbofilvu65wvh6bp/jun16-3-color2alpha. > xcf?rlkey=mw7blqojtw2zor1hfkc9ewgds&st=cq9dtojo&dl=0 New link now https://www.dropbox.com/scl/fi/lbflec0bnusogjwcbth4o/jun16-3-color2alpha-bug-fx.xcf?rlkey=m6a9ehc9py2f1wxtnbik9cfwn&st=wg7ueri0&dl=0