Support for pfd417

[portomartin]

pdf417(msg) {

	/** add */
	function add(arrayValues) {
		data.push(arrayValues);
	};

	var data = [];

	/** ESC POS */
	add([27, 116, 12]);

	/** QR Code: Select the model f=165 */
	add([0x1D, 0x28, 0x6B, 0x04, 0x00, 0x31, 0x41, 0x32, 0x00]);

	/** PDF417: Set the width of the module f=067 */
	add([0x1D, 0x28, 0x6B, 0x03, 0x00, 0x30, 0x43, 0x04]);

	/** PDF417: Set the row height f=068 */
	add([0x1D, 0x28, 0x6B, 0x03, 0x00, 0x30, 0x44, 0x01]);

	/** PDF417: Set the error correction level f=069 */
	add([0x1D, 0x28, 0x6B, 0x04, 0x00, 0x30, 0x45, 0x31, 0x00]);

	/** PDF417: Select the options f=070 */
	add([0x1D, 0x28, 0x6B, 0x03, 0x00, 0x30, 0x46, 0x00]);

	/** PDF417: Store the data in the symbol storage area f=080 */
	var dataLen = msg.length + 3;
	add([0x1D, 0x28, 0x6B, dataLen, 0x00, 0x30, 0x50, 0x30]);

	/** add content */
	var dataArray = [];
	for (var z in msg) {
		var letter = msg[z].charCodeAt(0);
		dataArray.push(letter);
	}
	add(dataArray);

	/** PDF417: Print the symbol data in the symbol storage area f=081 */
	add([0x1D, 0x28, 0x6B, 0x03, 0x00, 0x30, 0x51, 0x30]);
	
	/** write buffer */
	for (var x in data) {
		for (var y in data[x]) {
			this.buffer.writeUInt8(data[x][y]);
		}
	}

	return this;
}