129 lines
3.7 KiB
Bash
Executable File
129 lines
3.7 KiB
Bash
Executable File
#!/usr/bin/env zsh
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setopt rcquotes
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# eprintf <format> [args...]
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function eprintf {
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printf "${@}" >&2
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}
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# die <format> [args...]
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function die {
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eprintf '\e[91mfatal\e[m: '"${1}\n" "${(@)@:2}"
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exit 1
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}
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# print_help <argv[0]>
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function print_help {
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local exec_name="$(basename "${1}")"
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printf 'usage: %s [OPTIONS...] <GAME> [ARGS...]\n' "${exec_name}"
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printf 'Run a game inside an Xwayland session with a window manager. This\n'
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printf 'is very similar to gamescope, except that there is a window\n'
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printf 'involved. The default window manager is OpenBox.\n'
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printf '\n'
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printf ' -h Print this message, then exit.\n'
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printf ' -w Specify the window manager to use. This argument to this option will be\n'
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printf ' passed to "sh -c".\n'
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printf ' -r Specify the resolution of the Xwayland display. This should in the form\n'
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printf ' of ''WxH''. By default, the resolution of the currently focused output\n'
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printf ' will be used.\n'
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printf ' -d Specify the current desktop environment (or standalone Wayland\n'
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printf ' compositor). This is used if -r is not specified to find the resolution.\n'
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exit 0
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}
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# get_current_desktop
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function get_current_desktop {
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[[ -z "${XDG_CURRENT_DESKTOP}" ]] &&
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die 'set $XDG_CURRENT_DESKTOP or pass -d top specify desktop'
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eprintf 'Detected desktop: "%s"\n' "${XDG_CURRENT_DESKTOP}"
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printf '%s' "${XDG_CURRENT_DESKTOP}"
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}
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# get_default_resolution [desktop]
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function get_default_resolution {
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case "${1}" in
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'river')
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local output="$(ristate -o |
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jq -r '.outputs | keys.[] as $names |
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{output: $names, focused: .[$names].focused} |
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select(.focused) | .output')"
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eprintf 'Detected output: %s\n' "${output}"
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local resolution="$(wlr-randr --json |
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jq -r --arg output "${output}" \
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'.[] | select(.name == $output).modes.[] |
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select(.current) | "\(.width)x\(.height)"')"
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;;
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*)
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die 'unknown desktop session: "%s"' "${1}"
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;;
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esac
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eprintf 'Detected resolution: %s\n' "${resolution}"
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printf '%s\n' "${resolution}"
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}
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while getopts ':hw:r:d:' OPTOPT; do
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case "${OPTOPT}" in
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'h')
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print_help "${0}"
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;;
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'w')
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window_manager="${OPTARG}"
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;;
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'r')
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resolution="${OPTARG}"
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;;
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'd')
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current_desktop="${OPTARG}"
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;;
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':')
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die 'option requires an argument: %s' "${OPTARG}"
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;;
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'?')
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die 'unknown option: %s' "${OPTARG}"
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;;
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esac
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done
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(( "${OPTIND}" > ${#} )) && print_help "${0}"
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shift $(( "${OPTIND}" - 1))
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{
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set -e
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[[ -v window_manager ]] ||
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window_manager='openbox'
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[[ -v current_desktop ]] ||
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current_desktop="$(get_current_desktop 2>&3)"
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[[ -v resolution ]] ||
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resolution="$(get_default_resolution "${current_desktop}" 2>&3)"
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} 3>&2
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function on_sigchld {
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eprintf 'Xwayland or window manager died! Exiting...\n'
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kill %sh %Xwayland 2>/dev/null
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wait ${cat_pid}
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exit 1
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}
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trap on_sigchld CHLD
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coproc Xwayland -fullscreen -geometry "${resolution}" -displayfd 1
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local xwayland_display
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read <&p xwayland_display
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export DISPLAY=":${xwayland_display}"
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unset WAYLAND_DISPLAY
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eprintf 'Xwayland display: %s\n' "${DISPLAY}"
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cat <&p >&2
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let cat_pid="${!}"
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sh -c "exec -- ${window_manager}" &
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sh -c "exec -- ${@}"
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trap -
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kill %sh %Xwayland
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wait "${cat_pid}"
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eprintf 'Child died! Exiting...\n'
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