Blur alpha

[ErikReider]

Adds support for blur alpha.

2025-02-22.00-48-16.mp4

Tested with SwayFX main branch using:

for_window [app_id="kitty" title="opacity test"] floating enable; resize set 800 400
exec kitty -T "opacity test" -o "background_opacity 0.0" -e $SHELL -c './opacity_script.sh; read'

script to run in nested kitty:

set_opacity() {
    opacity=$(perl -e "print ((100 - $i) / 100)")
    swaymsg "[app_id=\"kitty\" title=\"opacity test\"] opacity $opacity"
    echo "Opacity: $opacity"
    sleep 0.1
}

while true; do
    for ((i = 0; i < 100; i++)); do
        set_opacity "$i"
    done
    for ((i = 100; i >= 0; i--)); do
        set_opacity "$i"
    done
done

Tested in SwayFX:

• Floating toplevels (non-optimized blur)
• Tiled toplevels and “x-ray” floating toplevels (optimized blur)
• Scene rect color alpha adjusts blur alpha

[ErikReider]

Updated the desc with a video of the implementation. There are some minor artifacts in the top right section of the window blur, where there are thin lines. This is due to the lowering of the num_passes and doubling of the blur radius (which displays more artifacts).

Not sure if there's anything that can be done here, except maybe mixing a max opacity blur with the lower opacity blur? Or maybe mixing the higher num_passes version with the lower one?

[WillPower3309]

Updated the desc with a video of the implementation. There are some minor artifacts in the top right section of the window blur, where there are thin lines. This is due to the lowering of the num_passes and doubling of the blur radius (which displays more artifacts).

Not sure if there's anything that can be done here, except maybe mixing a max opacity blur with the lower opacity blur? Or maybe mixing the higher num_passes version with the lower one?

Is this still present? I didn't notice it from the video

[ErikReider]

Updated the desc with a video of the implementation. There are some minor artifacts in the top right section of the window blur, where there are thin lines. This is due to the lowering of the num_passes and doubling of the blur radius (which displays more artifacts).
Not sure if there's anything that can be done here, except maybe mixing a max opacity blur with the lower opacity blur? Or maybe mixing the higher num_passes version with the lower one?

Is this still present? I didn't notice it from the video

Not anymore! :D