SUMMARY Cannot open GIMP XCF files especially when color depth is higher than 8 bits as described by Gilles Caulier from Digikam STEPS TO REPRODUCE 1. Open the following gimp image from Digikam I cannot attach the file since it much larger than 4mb. Here's the link https://www.sritch.com/pages/cares-20170212-6640.xcf (96Mb) OBSERVED RESULT (quote from Gilles Caulier) .......................... Hi, Yes problem is fully reproducible here. the Unit test from digiKam trying to load image report a message from the KImageIO XCF plugin as file is not recognized : digikam.dimg: "cares-20170212-6640.xcf" : "QIMAGE" file identified digikam.dimg.qimage: Can not load " "cares-20170212-6640.xcf" " using DImg::DImgQImageLoader! digikam.dimg.qimage: Error message from loader: "Unable to read image data" <=====!!!!!!! digikam.dimg: "cares-20170212-6640.xcf" : Unknown image format !!! This is a problem in the KDE plugin. The problem is the same for both shared files. Note that Exiftool is able to load XCF metadata : [gilles@localhost dimg]$ exiftool cares-20170212-6640.xcf ExifTool Version Number : 12.00 File Name : cares-20170212-6640.xcf Directory : . File Size : 98 MB File Modification Date/Time : 2021:05:26 05:13:00+02:00 File Access Date/Time : 2021:05:26 05:37:17+02:00 File Inode Change Date/Time : 2021:05:26 05:37:05+02:00 File Permissions : rw-r--r-- File Type : XCF File Type Extension : xcf MIME Type : image/x-xcf XCF Version : 12 Image Width : 4781 Image Height : 3586 Color Mode : RGB Color Compression : RLE Encoding X Resolution : 300 Y Resolution : 300 Tattoo : 2 Units : Inches Metadata Tag Name : Exif.Canon.0x0003 Metadata Tag : 0 0 0 0 Comment : Image Size : 4781x3586 Megapixels : 17.1 So, please report this problem to KDE bugzilla component "frameworks-kimageformats". Look like there are already some files open about XCF support, and especially when color depth is higher than 8 bits. https://bugs.kde.org/buglist.cgi?bug_status=UNCONFIRMED&bug_status=CONFIRMED&bug_status=ASSIGNED&bug_status=REOPENED&component=general&list_id=1874818&product=frameworks-kimageformats&query_format=advanced Best Gilles Caulier ......................... SOFTWARE/OS VERSIONS OS: Manjaro Linux x86_64 Host: MS-7693 2.0 Kernel: 5.10.36-2-MANJARO Uptime: 3 hours, 13 mins Packages: 1542 (pacman) Shell: bash 5.1.8 Resolution: 2560x1080 DE: Plasma 5.21.5 WM: KWin WM Theme: Breeze Theme: Breath2 [Plasma], Breeze [GTK2/3] Icons: breath2 [Plasma], breath2 [GTK2/3] Terminal: konsole Terminal Font: Noto Mono 14 CPU: AMD FX-8350 (8) @ 4.000GHz GPU: AMD ATI Radeon RX 470/480/570/570X/580/580X/590 Memory: 1037MiB / 11992MiB Qt 5.15.2 (x86_64-little_endian-lp64 shared (dynamic) release build; by GCC 10.2.0) on "xcb" OS: Manjaro Linux [linux version 5.10.36-2-MANJARO] Architecture: x86_64; features: SSE2 SSE3 SSSE3 SSE4.1 SSE4.2 AVX Thank you
That file has two features we don't support: * It identifies itself as version 12 and we fail if version > 11 * It has a layer of type RGB_GIMAGE with bpp 6 and we only support RGB_GIMAGE layers of bpp3 I stopped debugging there, needs someone to put some time into it. Martin you did the last big-ish refactor in the XCF loader, fancy having a go? Or maybe you Daniel?
FWIW https://gitlab.gnome.org/GNOME/gimp/-/blob/master/devel-docs/xcf.txt has a relatively good description of the format
There are more things to do. I tried to save some XCF files from development GIMP 2.99.7 When option "Save this XCF file with better but slower compression" is selected, kimg_xcf will not load it. We should also load color profile and set it to QImage via QColorSpace class.
Hi, I just checked with digiKam 7.8.0 using KF5 5.95, and a XCF file saved with 16 bits as integer do not render a thumbnail in icon view. Best Gilles Caulier