SUMMARY While drawing with Mouse Mark a rectangle (presumably a smoothing effect for the drawn lines) gets anchored to the cursor and it increases in size the further the cursor gets from the screens topleft 0,0. For example on an 1920x1080 screen, if the cursor is drawing say at 0,540 the (anchored) smoothing box is now the size of 0,540 ie. it now touches the edge of the screen. So I presume the origo of the smoothing effect for Mouse Mark lines is being drawn to the mouse position (as a rectangle?) instead on top of the of the whole screen. STEPS TO REPRODUCE 1. Draw a lot of lines 2. Draw more on top of other lines and you'll see a shadow rectangle anchored under the mouse 3. Observe the shadow smoothing the drawn lines. OBSERVED RESULT The rectangle flickers the screen as it smoothes/unsmoothes the lines. EXPECTED RESULT No flicker and the lines are smoothed properly. SOFTWARE/OS VERSIONS kinfo: Operating System: Manjaro Linux KDE Plasma Version: 6.4.5 KDE Frameworks Version: 6.18.0 Qt Version: 6.9.2 Kernel Version: 6.16.8-1-MANJARO (64-bit) Graphics Platform: Wayland Processors: 16 × AMD Ryzen 7 5800X3D 8-Core Processor Memory: 128 GiB of RAM (125.4 GiB usable) Graphics Processor: AMD Radeon RX 7900 XTX ADDITIONAL INFORMATION In the attachment the rectangle is very faint, it's a lot more noticeable on my monitor/with my eyes (I'm not sure why). Possibly related bugs: https://bugs.kde.org/show_bug.cgi?id=337044 https://bugs.kde.org/show_bug.cgi?id=501215
Created attachment 185128 [details] Faint shadow anchored to the cursor smoothes the drawn lines I downscaled the video substantially so the rectangle is easier to see
When creating the arrows the smoothing effect is properly aligned to 0,0 so there's no separate rectangle like with the free draw, however the smoothness effect still flickers in and out of existence while creating an arrow and moving the mouse ie. when re-drawing the arrow.
Can reproduce.