+/* values for window scaling */
+#define WINDOW_SCALING_NOT_AVAILABLE FALSE
+#define WINDOW_SCALING_AVAILABLE TRUE
+
+#define MIN_WINDOW_SCALING_PERCENT 50
+#define STD_WINDOW_SCALING_PERCENT 100
+#define MAX_WINDOW_SCALING_PERCENT 300
+#define STEP_WINDOW_SCALING_PERCENT 10
+
+/* values for window scaling quality */
+#define SCALING_QUALITY_NEAREST "nearest"
+#define SCALING_QUALITY_LINEAR "linear"
+#define SCALING_QUALITY_BEST "best"
+
+#define SCALING_QUALITY_DEFAULT SCALING_QUALITY_LINEAR
+
+/* values for touch control */
+#define TOUCH_CONTROL_VIRTUAL_BUTTONS "virtual_buttons"
+#define TOUCH_CONTROL_WIPE_GESTURES "wipe_gestures"
+
+#define TOUCH_CONTROL_DEFAULT TOUCH_CONTROL_VIRTUAL_BUTTONS
+
+#define TOUCH_MOVE_DISTANCE_DEFAULT 2
+#define TOUCH_DROP_DISTANCE_DEFAULT 5
+