Bug 504937

SUMMARY

There is a theme I've found that relies on transparent title bars with blur. This works great on my faster machine, but on my slower machine I need to disable blur, because it will lag horribly. However, rather than leaving the transparent title bar with some sort of slightly opaque gray or e.g. some almost transparent pre-blurred version of the desktop wallpaper mixed in, it's simply left 100% transparent. As a result, the title bar text is completely unreadable half the time, since it's white text on a 100% transparent background on often something bright behind it.

It would therefore help keeping such themes usable, if instead of the regular "Blur" there was like a "Fake Blur" that either mixes in a solid color with a configurable transparency, or mixes in a pre-blurred version of the desktop wallpaper at a configurable transparency.

I suppose alternatively you could try to make the blur effect even faster, but I imagine there's a limit to how far that is feasible. The device in question where the effect isn't usable for me, is the Raspberry Pi 5, which has an extremely low-end GPU.

STEPS TO REPRODUCE

1. Use a theme with transparent blur title bars
2.  Disable the "Blur" desktop effect
3. Try to find some other effect to make the title bars usable

OBSERVED RESULT

Title bars look nice but aren't usable. Some slight gray tint would already fix this issue.

EXPECTED RESULT

Any sort of "Fake blur" alternative for low end machines that allows keeping blurred areas usable.

SOFTWARE/OS VERSIONS

Windows: 
macOS: 
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma: postmarketOS Edge ARM64
KDE Plasma Version: 6.3.5
KDE Frameworks Version: 6.13.0
Qt Version: 6.8.2

ADDITIONAL INFORMATION