Almost a month since my last blog post. And of course lots of work in KWin in the frameworks-scratch branch since then – about 160 commits. Today I finally reached the next milestone: dogfooding. I dared to replace the KWin of my working session by the new version based on Qt 5 and it’s useable. Of course it’s not yet in a fully functional state, but there’s still quite some time till our release and being able to dogfood will make the work much easier as I can see the regressions better than in the restricted Xephyr session.
The main remaining problem I was facing were regressions in the window decoration. The problem was that once you resized a window, the decoration was broken. I spent quite some time in the debugger to figure out what is going wrong. As Qt switched from XLib to XCB some of the assumptions inside KWin didn’t hold anymore. These were fun debug sessions. In the end a one line change after each window resize step fixed this issue.
With that done the most important functionality is present. I would share a screenshot, but it doesn’t make much sense as there is visually no difference to notice at all. Hugo did an awesome job with Oxygen and that means everything looks the same.
As compositor I’m currently using the OpenGL 2 on egl backend as the glx one is rather broken. I haven’t investigated yet and won’t do anytime soon. So if you want to test better use the environment variable to force to egl or just fix it I still hope that egl drivers will be present in all major driver implementations till our next release and that would allow to just drop the glx backend.
Of course there is still lots of work needed and your help is always appreciated. And of course there is the chance to get a sneak preview and a development setup by using for example Project Neon.