better compton manager

comp.sh

@@ -1,10 +0,0 @@
-#!/usr/bin/zsh
-compton_lockfile=/tmp/compton.lock
-if [[ -e ${compton_lockfile} ]]; then
-		kill $(pgrep compton)
-		rm ${compton_lockfile}
-else
-		touch ${compton_lockfile}
-		compton --vsync drm --unredir-if-possible --paint-on-overlay -cGCb -t-5 -l-5 -r4 -o.55 -m.95
-fi
-exit 0

compton_toggle

@@ -0,0 +1,20 @@
+#!/usr/bin/zsh
+nvidia_dev='/dev/nvidia0'
+lockfile='/tmp/compton.lock'
+if [[ -r $lockfile ]]; then
+	read pid < $lockfile
+	kill $pid
+	rm $lockfile
+else
+	if [[ -e $nvidia_dev ]]; then
+		vsync_backend='opengl'
+	else
+		vsync_backend='drm'
+	fi
+	compton --vsync $vsync_backend --unredir-if-possible --paint-on-overlay -cGCb -t-5 -l-5 -r4 -o.55 -m.95
+	pid=$(pidof compton)
+	if [[ -n $pid ]]; then
+		printf '%s' $pid > $lockfile
+	fi
+fi
+exit 0