https://bugs.kde.org/show_bug.cgi?id=390698
Bug ID: 390698
Summary: Edges of transformed windows are jaggy
Product: kwin
Version: 5.12.1
Platform: Other
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: scene-opengl
Assignee: kwin-bugs-n...@kde.org
Reporter: vladz...@gmail.com
Target Milestone: ---
Most effects, which transform windows, suffer from jaggy window edges(see
attached pictures below).
Step to reproduce:
* enable opengl compositor
* activate effects like Flip switch, Cover switch, Fall apart, Magic lamp
* take closer look at window edges
Expected:
smooth window edges
Possible fixes:
(a) Introduce new flag in KWin::Effect: PAINT_WINDOW_MULTISAMPLE
SceneOpenGL2Window enables multisampling when it sees the flag above
(b) SceneOpenGL2Windows enables multisampling by checking whether window quad
list has been modified(by calling smoothNeeded?)
_Please note that I don't know exactly how KWin renders windows._
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