Add kerning tweaking to the KUAl ext

kindle/extensions/koreader/bin/koreader-ext.sh

@@ -193,6 +193,16 @@ cre_nohinting()
 	set_cre_prop "font.hinting.mode" "0"
 }
 
+# Handle CRe's font.kerning.enabled
+cre_kerning()
+{
+	set_cre_prop "font.kerning.enabled" "1"
+}
+cre_nokerning()
+{
+	set_cre_prop "font.kerning.enabled" "0"
+}
+
 
 ## Main
 case "${1}" in
@@ -211,6 +221,12 @@ case "${1}" in
 	"cre_nohinting" )
 		${1}
 	;;
+	"cre_kerning" )
+		${1}
+	;;
+	"cre_nokerning" )
+		${1}
+	;;
 	* )
 		logmsg "invalid action (${1})"
 	;;

kindle/extensions/koreader/menu.json

@@ -109,6 +109,28 @@
 				"refresh": false,
 				"status": false,
 				"internal": "status Setup CRe to forgo font hinting"
+			},
+			{
+				"name": "Enable CRe font kerning",
+				"priority": 6,
+				"action": "./bin/koreader-ext.sh",
+				"params": "cre_kerning",
+				"exitmenu": false,
+				"checked": true,
+				"refresh": false,
+				"status": false,
+				"internal": "status Setup CRe to enable kerning"
+			},
+			{
+				"name": "Disable CRe font kerning",
+				"priority": 7,
+				"action": "./bin/koreader-ext.sh",
+				"params": "cre_nokerning",
+				"exitmenu": false,
+				"checked": true,
+				"refresh": false,
+				"status": false,
+				"internal": "status Setup CRe to disable kerning"
 			}
 			]
 		}