https://bugs.kde.org/show_bug.cgi?id=467675
--- Comment #38 from caulier.gil...@gmail.com --- Hi Maik, I can reproduce now the dysfunction with WEBP under Linux. - Open a JPEG files in editor - Run GMIC Qt B&W filter. - Export to WebP The resulting image generated by GMIC Qt is fine in editor. GMIC convert from RGBA to grayscale image. When we re-importing the image data, we re-convert to DImg as RGBA. Code is located in this function: https://github.com/cgilles/gmic-qt/blob/master/src/Host/digiKam/editor/host_digikam.cpp#L75 Nothing special here. If i export to another format image is not broken. I tried TIFF, PGF, JPEG, PNG, etc... But in fact it's not only relevant of any filter applied to GMIC: all image process and exported in WEBP are broken. For ex, A JPEG file post-processed in GMIC with Brightness-Contrast filter and exported as WEBP is also broken. So something is wrong in WEBP plugin. I tried to disable the saveMetadata() in DIMg::Qimage plugin to see if it have any effect. It's not better, expected that alpha channel become the main color and no contents is displayed. I analyzed the WEBP RGB contents generated and it sound like only the first column of the image is used to generate all the rest. Open the WEBP image export to gimp and disable the alpha channel: https://i.imgur.com/2rL83S6.png It's a really strange effect. Note: an image post processed in GMIC and export in PNG and reopen in editor to be re-exported a WEBP is fine. So for me, something is badly pass to the DImg container when post processed in GMIC that WEBP codec miss-understood. For the moment i have no other ideas in mind. Best Gilles -- You are receiving this mail because: You are watching all bug changes.
