color-hash.ksh: small improvements

Don't set color and return the index instead. This allows also using it
for background. Sprinkle a couple of '-nr --' for 'print' calls. Add the
fnv1 variant.

utils/openbsd/X11/xenodm/Xsetup_0

@@ -1,6 +1,4 @@
 #!/bin/sh
-/usr/local/bin/sct 3500
 xset r rate 300 75
 xsetroot -solid "#000000"
-/usr/local/bin/xli -onroot -gamma 2.2 /etc/X11/xenodm/pixmaps/FreeHugsBSD-bg.png
 xconsole -geometry 480x130-0-0 -daemon -notify -verbose -exitOnFail

utils/scripts/color-hash.ksh

@@ -6,9 +6,25 @@ function _color_hash_djb2
 	while (( ${#s} > 0 )); do
 		c=0x${s%${s#??}}
 		s=${s#??}
-		h=$(( ((($h << 5) + $h) + $c) & 0xffff ))
+		h=$(( ((($h << 5) + $h) ^ $c) & 0xffff ))
 	done
-	print $h
+	print -nr -- $h
+}
+
+function _color_hash_fnv1
+{
+	local c h s
+	s=$1
+	h=${2:-2166136261}
+	while (( ${#s} > 0 )); do
+		c=0x${s%${s#??}}
+		s=${s#??}
+		h=$(( (($h << 24) + ($h << 8) +
+		    ($h << 7) + ($h << 4) + ($h << 1) + $h) & 0xffffffff ))
+		h=$(( $h ^ $c ))
+	done
+	# xor-fold to 16 bits
+	print -nr -- $(( ($h >> 16) ^ ($h & 0xffff) ))
 }
 
 function _color_hash_fnv1a
@@ -24,7 +40,7 @@ function _color_hash_fnv1a
 		    ($h << 7) + ($h << 4) + ($h << 1) + $h) & 0xffffffff ))
 	done
 	# xor-fold to 16 bits
-	print $(( ($h >> 16) ^ ($h & 0xffff) ))
+	print -nr -- $(( ($h >> 16) ^ ($h & 0xffff) ))
 }
 
 function color_hash
@@ -36,7 +52,7 @@ function color_hash
 	while getopts bi: flag; do
 		case $flag in
 		b)	bright=true ;;
-		i)	if [[ $OPTARG != @(djb2|fnv1a) ]]; then
+		i)	if [[ $OPTARG != @(djb2|fnv1|fnv1a) ]]; then
 				return 1
 			fi
 			impl=_color_hash_$OPTARG
@@ -47,7 +63,7 @@ function color_hash
 	shift $(($OPTIND - 1))
 
 	h=
-	s=$(print -nr "$1" | od -A n -t x1 | tr -d '[:space:]*')
+	s=$(print -nr -- "$1" | od -A n -t x1 | tr -d '[:space:]*')
 	while :; do
 		h=$($impl "$s" $h)
 		# Avoid modulo bias.
@@ -63,5 +79,5 @@ function color_hash
 		n=$(( $h + ($h < 6 ? 1 : 3) ))
 	fi
 
-	tput setaf $n 0 0 2>/dev/null
+	print -nr -- "$n"
 }

utils/scripts/x-dpi-facesizes.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 # env
-# Written in 2022 by Lucas
+# Written in 2022-2023 by Lucas
 # CC0 1.0 Universal/Public domain - No rights reserved
 #
 # To the extent possible under law, the author(s) have dedicated all
@@ -12,21 +12,31 @@
 
 usage()
 {
-	printf "Usage: %s [targetdpi]\n" "${0##*/}" >&2
+	printf "Usage: %s [-n] [targetdpi]\n" "${0##*/}" >&2
 	exit 1
 }
 
+err()
+{
+	printf "%s: %s\n" "${0##*/}" "$*" >&2
+	exit 1
+}
+
+show=false
+while getopts n flag; do
+	case $flag in
+	n)	show=true ;;
+	*)	usage ;;
+	esac
+done
+shift $((OPTIND - 1))
 if [ $# -gt 1 ]; then
 	usage
 fi
 
-FACESIZES="10.5 6.0 8.0 9.0 10.5 12.0 18.0"
+FACESIZES="8.0 4.0 6.0 7.0 8.0 9.0 10.0 12.0"
-BASEDPI=96
 
-if [ -n "$1" ]; then
+basedpi=$(xdpyinfo | grep '^  resolution:' | {
-	targetdpi=$1
-elif command -v xdpyinfo >/dev/null 2>&1; then
-	targetdpi=$(xdpyinfo | grep '^  resolution:' | {
 	min=
 	while read -r line; do
 		set -- $line
@@ -44,20 +54,28 @@ elif command -v xdpyinfo >/dev/null 2>&1; then
 		echo "$min / 2" | bc -l
 	fi
 })
+
+if [ -z "$basedpi" ]; then
+	err "Can't find DPI"
 fi
-: ${targetdpi:=96}
+
+targetdpi=${1:-96}
 
 for facesize in $FACESIZES; do
-	echo "$BASEDPI * $facesize / $targetdpi"
+	echo "$basedpi * $facesize / $targetdpi"
 done | bc -l | {
 	i=0
 	printf "Xft.dpi:\t%.1f\n" "$targetdpi"
 	while read -r v; do
 		if [ $i -eq 0 ]; then
-			printf "XTerm.VT100.faceSize:\t%.1f\n" "$v"
+			printf "XTerm.VT100.faceSize:\t%f\n" "$v"
 		else
-			printf "XTerm.VT100.faceSize%d:\t%.1f\n" $i "$v"
+			printf "XTerm.VT100.faceSize%d:\t%f\n" $i "$v"
 		fi
 		i=$(($i + 1))
 	done
-} | xrdb -merge
+} | if $show; then
+	cat
+else
+	xrdb -merge
+fi