doc + demo

scripts/demo-mkfimg.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+
+echo "=== make a lot of float img ==="
+
+MKFIMG="../tools/mkfimg"
+SIZE=" 640x480 "
+
+for type in $(${MKFIMG} -L)
+do
+	picname="/tmp/${type}.fimg"
+	echo $picname
+	${MKFIMG} -v -t $type $picname $SIZE
+done