https://bugs.kde.org/show_bug.cgi?id=351687
--- Comment #3 from bastimeyer...@gmail.com --- I think I have found a fix for this issue. In the DesktopGridEffect's prePaintScreen method, two additional bits are set on the ScreenPrePaintData mask: PAINT_SCREEN_TRANSFORMED and PAINT_SCREEN_BACKGROUND_FIRST https://github.com/KDE/kwin/blob/v5.14.90/effects/desktopgrid/desktopgrid.cpp#L164 According to the scene header file, the whole screen will be painted if PAINT_SCREEN_TRANSFORMED is set. PAINT_SCREEN_REGION on the other hand will only paint a region of the screen. https://github.com/KDE/kwin/blob/v5.14.90/scene.h#L116-L120 So in order to fix the issue of the overlaying tiles, I tried to replace PAINT_SCREEN_TRANSFORMED with PAINT_SCREEN_REGION and rebuilt my disto's kwin package with this change applied. This did indeed fix it, but another issue I could observe was a bit of occasional jittering on the borders of each tile after the end of the animation. Because of this, I changed the bitmask again and made it so, that PAINT_SCREEN_TRANSFORMED gets set at the end of the animation, while PAINT_SCREEN_REGION gets set during the animation. This fixed the jittering and everything seems to be working well now. But since I don't know anything about the internals of KWin and since I'm also not a c++ dev, I don't want to submit a patch and would instead kindly ask for somebody else to properly take a look at this, so that this annoying bug can finally be fixed. Thanks! Here is my diff: https://gist.githubusercontent.com/bastimeyer/81c60699e5f5e762beb01a4bfeff1700/raw/04a2ab784f05f9f3cec522f4ac2a470e9cc803ac/desktopgrid-overlaying-tiles-fix.patch -- You are receiving this mail because: You are watching all bug changes.
