From e33fc1dacb7b3ed4e84fb007b72ad486f462cc87 Mon Sep 17 00:00:00 2001
From: Yohann Leon <yohann@leon.re>
Date: Wed, 12 Dec 2018 00:29:17 +0100
Subject: [PATCH] fix: return default dpi pixel coordinates if no dpi is set

---
 betterlockscreen | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/betterlockscreen b/betterlockscreen
index 0cef78d..2ef6208 100755
--- a/betterlockscreen
+++ b/betterlockscreen
@@ -123,13 +123,19 @@ lockselect() {
 logical_px() {
 	# get dpi value from xrdb
 	local DPI=$(xrdb -query | awk '/Xft.dpi/ {print $2}')
-	local SCALE=$(echo "scale=2; $DPI / 96.0" | bc)
-
-	# check if scaling the value is worthy
-	if [ $(echo "$SCALE > 1.25" | bc -l) -eq 0 ]; then
+	
+	# return the default value if no DPI is set
+	if [ -z "$DPI"]; then
 		echo $1
 	else
-		echo "$SCALE * $1 / 1" | bc
+		local SCALE=$(echo "scale=2; $DPI / 96.0" | bc)
+
+		# check if scaling the value is worthy
+		if [ $(echo "$SCALE > 1.25" | bc -l) -eq 0 ]; then
+			echo $1
+		else
+			echo "$SCALE * $1 / 1" | bc
+		fi
 	fi
 }