Function NewWithForcedVersion

qrcode.go:209–258

NewWithForcedVersion constructs a QRCode of a specific version. var q *qrcode.QRCode q, err := qrcode.NewWithForcedVersion("my content", 25, qrcode.Medium) An error occurs in case of invalid version.

(content string, version int, level RecoveryLevel)

//
// An error occurs in case of invalid version.
func NewWithForcedVersion(content string, version int, level RecoveryLevel) (*QRCode, error) {
	var encoder *dataEncoder

	switch {
	case version >= 1 && version <= 9:
		encoder = newDataEncoder(dataEncoderType1To9)
	case version >= 10 && version <= 26:
		encoder = newDataEncoder(dataEncoderType10To26)
	case version >= 27 && version <= 40:
		encoder = newDataEncoder(dataEncoderType27To40)
	default:
		return nil, fmt.Errorf("Invalid version %d (expected 1-40 inclusive)", version)
	}

	var encoded *bitset.Bitset
	encoded, err := encoder.encode([]byte(content))

	if err != nil {
		return nil, err
	}

	chosenVersion := getQRCodeVersion(level, version)

	if chosenVersion == nil {
		return nil, errors.New("cannot find QR Code version")
	}

	if encoded.Len() > chosenVersion.numDataBits() {
		return nil, fmt.Errorf("Cannot encode QR code: content too large for fixed size QR Code version %d (encoded length is %d bits, maximum length is %d bits)",
			version,
			encoded.Len(),
			chosenVersion.numDataBits())
	}

	q := &QRCode{
		Content: content,

		Level:         level,
		VersionNumber: chosenVersion.version,

		ForegroundColor: color.Black,
		BackgroundColor: color.White,

		encoder: encoder,
		data:    encoded,
		version: *chosenVersion,
	}

	return q, nil
}

// Bitmap returns the QR Code as a 2D array of 1-bit pixels.
//