Add line generation code

griddle

@@ -13,6 +13,34 @@ get_image_dimension() {
 	printf "%s" "$height"
 }
 
+generate_lines() {
+	columns="$1"
+	rows="$2"
+
+	width="$3"
+	height="$4"
+
+	#colwidth=$((width / columns))
+	#for i in $(seq 0 $columns); do
+		#current_colwidth=$((colwidth * i))
+		#printf "line 0, %d %d, %d " $current_colwidth $height $current_colwidth
+	#done
+
+	rowheight=$((height / rows))
+	for i in $(seq 0 $rows); do
+		current_rowheight=$((rowheight * i))
+		printf "line 0, %d %d, %d " $current_rowheight $width $current_rowheight
+	done
+}
+
+create_image() {
+	inputfile="$1"
+	lines="$2"
+	outputfile="$3"
+
+	convert -draw "$lines" "$inputfile" "$outputfile"
+}
+
 main() {
 	if test "$#" -ne 4; then
 		printf "Usage: griddle <inputfile> <columns> <rows> <outputfile>\n"
@@ -43,7 +71,9 @@ main() {
 	width="$(get_image_dimension $inputfile $WIDTH)"
 	height="$(get_image_dimension $inputfile $HEIGHT)"
 
-	echo "$inputfile" "columns: $columns" "rows: $rows" "$outputfile" "Dimensions: $width x $height"
+	lines="$(generate_lines $columns $rows $width $height)"
+
+	create_image "$inputfile" "$lines" "$outputfile"
 }
 
 main "$@"