mpv is shown fullscreen over locker

[coffebar]

Issue

If mpv is in full screen mode, xsecurelock is not visible.
Every time i using mpv, and screen is locked, my password prompt looks like that:

This should be investigated.

Env

Version:
1.8.0
My platform:
Linux Arch x86, i3wm

My options:

XSECURELOCK_COMPOSITE_OBSCURER=0 XSECURELOCK_SHOW_USERNAME=0 \
	XSECURELOCK_SHOW_HOSTNAME=0 XSECURELOCK_SHOW_DATETIME=1 \
	XSECURELOCK_PASSWORD_PROMPT=kaomoji xsecurelock

workaround

run this script before lock

#!/bin/sh

# exit fullscreen from mpv before lock screen
/usr/bin/xdotool key \
	--clearmodifiers \
	--window "$(/usr/bin/xdotool search --onlyvisible --class mpv)" Escape

[divVerent]

In other words, on your system mpv manages to disable compositing and thus showing of xsecurelock's Composite Overlay Window.

Your setting of XSECURELOCK_COMPOSITE_OBSCURER=0 reveals that this is likely what is going on here.

Sadly fixing this depends on settings of your compositing manager - you need to configure it so it does not turn off compositing when a fullscreen application is running. Which are you using?

[coffebar]

I'm using picom compositor.
Btw, if i open a terminal window in fullscreen, it seems compositing is not disabled (I can see my wallpapers through a 80% transparent window)