57 lines
2.0 KiB
Bash
Executable File
57 lines
2.0 KiB
Bash
Executable File
#!/usr/bin/env bash
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#
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# Temporarily turn off Hyprland direct scanout. A direct-scanned fullscreen
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# window bypasses the compositor, so it also bypasses screen shaders and
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# layer-shell overlays. Each invocation extends one shared hold and restores
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# the exact previous setting after the last visual effect is gone.
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set -uo pipefail
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seconds=${1:-1}
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number='^[0-9]*\.?[0-9]+$'
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[[ $seconds =~ $number ]] || seconds=1
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command -v hyprctl >/dev/null 2>&1 || exit 0
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command -v jq >/dev/null 2>&1 || exit 0
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runtime=${XDG_RUNTIME_DIR:-/tmp}/attention-required
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mkdir -p "$runtime" || exit 0
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state=$runtime/composite-state
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lock=$runtime/composite.lock
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milliseconds=$(awk -v seconds="$seconds" 'BEGIN { printf "%d", (seconds + 0.3) * 1000 }')
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now() { date +%s%3N; }
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direct_scanout() { hyprctl -j getoption render:direct_scanout 2>/dev/null | jq -r '.int // empty'; }
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set_direct_scanout() {
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hyprctl -q eval "hl.config({ render = { direct_scanout = $1 } })" >/dev/null 2>&1 \
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|| hyprctl -q keyword render:direct_scanout "$1" >/dev/null 2>&1
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}
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exec 9>"$lock"
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flock 9
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current=$(direct_scanout)
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[[ $current =~ ^[0-2]$ ]] || exit 0
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until=$(( $(now) + milliseconds ))
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previous=$current
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if [[ -s $state ]]; then
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IFS=$'\t' read -r saved_previous saved_until < "$state" || true
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[[ $saved_previous =~ ^[0-2]$ ]] && previous=$saved_previous
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[[ $saved_until =~ ^[0-9]+$ && $saved_until -gt $until ]] && until=$saved_until
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fi
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printf '%s\t%s\n' "$previous" "$until" > "$state"
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set_direct_scanout 0 || { rm -f "$state"; exit 0; }
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flock -u 9
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# Let parallel invocations extend the deadline. The final one restores the
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# setting only if nothing else has changed it in the meantime.
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sleep "$(awk -v deadline="$until" -v current="$(now)" 'BEGIN { printf "%.3f", (deadline - current) / 1000 + 0.05 }')"
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flock 9
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IFS=$'\t' read -r previous until < "$state" || exit 0
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[[ $until =~ ^[0-9]+$ && $(now) -ge $until ]] || exit 0
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current=$(direct_scanout)
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if [[ $current == 0 && $previous =~ ^[0-2]$ ]]; then
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set_direct_scanout "$previous" || true
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fi
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rm -f "$state"
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