# A compositor that exists only so Sunshine has something to capture.
# mainframe has no desktop: the only connected output (HDMI-A-2) hangs off the
# Intel iGPU, while the RTX 3060 that does the encoding drives no monitor at
# all. Capturing the real output would mean grabbing on Intel and encoding on
# NVIDIA — a cross-GPU copy every frame. A virtual output on the 3060 keeps
# capture and NVENC on one card.

output HEADLESS-1 mode 1920x1080@60Hz position 0,0
output HEADLESS-1 background #101920 solid_color

# Start Xwayland eagerly rather than on first X client. Steam is an X app, and
# with the default lazy start DISPLAY does not exist yet when the line below
# imports the environment — so Steam launched by Sunshine got
# "Unable to open a connection to X" and showed a blank stream.
xwayland force

# Sunshine is a systemd user unit and inherits nothing from this session, so
# hand it the display variables before starting it.
exec systemctl --user import-environment WAYLAND_DISPLAY DISPLAY XDG_CURRENT_DESKTOP
exec systemctl --user start sunshine.service

# Input arrives from the Moonlight client, so keybinds are worth having even
# though nobody is sitting at this machine. Without them the Desktop app
# streams an empty screen with no way to open anything.
set $mod Mod4
bindsym $mod+Return exec kitty
bindsym $mod+d      exec wofi --show drun
bindsym $mod+Shift+q kill
bindsym $mod+Shift+e exec swaymsg exit

# Something visible on login, so a working capture is obviously working rather
# than indistinguishable from a broken one.
exec kitty

# No bar, no idle daemon, no lock screen — there is no one sitting here.