Method encode

qrcode.go:391–428

encode completes the steps required to encode the QR Code. These include adding the terminator bits and padding, splitting the data into blocks and applying the error correction, and selecting the best data mask.

()

// adding the terminator bits and padding, splitting the data into blocks and
// applying the error correction, and selecting the best data mask.
func (q *QRCode) encode() {
	numTerminatorBits := q.version.numTerminatorBitsRequired(q.data.Len())

	q.addTerminatorBits(numTerminatorBits)
	q.addPadding()

	encoded := q.encodeBlocks()

	const numMasks int = 8
	penalty := 0

	for mask := 0; mask < numMasks; mask++ {
		var s *symbol
		var err error

		s, err = buildRegularSymbol(q.version, mask, encoded, !q.DisableBorder)

		if err != nil {
			log.Panic(err.Error())
		}

		numEmptyModules := s.numEmptyModules()
		if numEmptyModules != 0 {
			log.Panicf("bug: numEmptyModules is %d (expected 0) (version=%d)",
				numEmptyModules, q.VersionNumber)
		}

		p := s.penaltyScore()

		//log.Printf("mask=%d p=%3d p1=%3d p2=%3d p3=%3d p4=%d\n", mask, p, s.penalty1(), s.penalty2(), s.penalty3(), s.penalty4())

		if q.symbol == nil || p < penalty {
			q.symbol = s
			q.mask = mask
			penalty = p
		}
	}
}

// addTerminatorBits adds final terminator bits to the encoded data.
//