Created attachment 122542 [details] image shwoing the artefact SUMMARY While testing the master branch - 4.3.0-prealpha (git 5c326ec) I encountered a bug in Gaussian blur filter. the output of the filter is chipped like a mismatched tile. I have attached a example image to better describe it. The artefact depends on the place of the object and mostly is reproducible easily with a square shaped object. STEPS TO REPRODUCE 1. Open Krita and a new a4 document, draw a rectangle selection in the middle of the document 2. Run Gaussian blur filter with radius of 500 or more, the more is the radius more clear the artefact will be A video of the bug can be viewed here -> https://box.raghukamath.com/cloud/index.php/s/5MkDqKRxD52fzmf Operating System: Arch Linux KDE Plasma Version: 5.16.5 KDE Frameworks Version: 5.61.0 Qt Version: 5.13.0 Kernel Version: 5.2.11-arch1-1-ARCH OS Type: 64-bit Processors: 8 × Intel® Core™ i7-4790K CPU @ 4.00GHz Memory: 15.6 GiB of RAM
I can confirm. And that is surely a regression, since I fixed that a few times already :)
Git commit 14efe87feb5862eef30f0aab94619650fadf95cb by Dmitry Kazakov. Committed on 09/09/2019 at 13:48. Pushed by dkazakov into branch 'master'. Fix artifacts in Gaussian Blur on transparent layer Our border-repear strategy should work not on the exact bounds of the device, but on the bounds of the image. M +1 -1 libs/image/kis_convolution_painter.cc https://invent.kde.org/kde/krita/commit/14efe87feb5862eef30f0aab94619650fadf95cb
Git commit edab84fb29e75bc4acffc5cb2af7ef3a38f5da1a by Dmitry Kazakov. Committed on 13/09/2019 at 09:00. Pushed by dkazakov into branch 'krita/4.2'. Fix artifacts in Gaussian Blur on transparent layer Our border-repear strategy should work not on the exact bounds of the device, but on the bounds of the image. M +1 -1 libs/image/kis_convolution_painter.cc https://invent.kde.org/kde/krita/commit/edab84fb29e75bc4acffc5cb2af7ef3a38f5da1a