Class BitMatrixParser

java.lang.Object
com.google.zxing.qrcode.decoder.BitMatrixParser

final class BitMatrixParser extends Object
  • Field Details

    • bitMatrix

      private final BitMatrix bitMatrix
    • parsedVersion

      private Version parsedVersion
    • parsedFormatInfo

      private FormatInformation parsedFormatInfo
    • mirror

      private boolean mirror
  • Constructor Details

  • Method Details

    • readFormatInformation

      FormatInformation readFormatInformation() throws FormatException

      Reads format information from one of its two locations within the QR Code.

      Returns:
      FormatInformation encapsulating the QR Code's format info
      Throws:
      FormatException - if both format information locations cannot be parsed as the valid encoding of format information
    • readVersion

      Version readVersion() throws FormatException

      Reads version information from one of its two locations within the QR Code.

      Returns:
      Version encapsulating the QR Code's version
      Throws:
      FormatException - if both version information locations cannot be parsed as the valid encoding of version information
    • copyBit

      private int copyBit(int i, int j, int versionBits)
    • readCodewords

      byte[] readCodewords() throws FormatException

      Reads the bits in the BitMatrix representing the finder pattern in the correct order in order to reconstruct the codewords bytes contained within the QR Code.

      Returns:
      bytes encoded within the QR Code
      Throws:
      FormatException - if the exact number of bytes expected is not read
    • remask

      void remask()
      Revert the mask removal done while reading the code words. The bit matrix should revert to its original state.
    • setMirror

      void setMirror(boolean mirror)
      Prepare the parser for a mirrored operation. This flag has effect only on the readFormatInformation() and the readVersion(). Before proceeding with readCodewords() the mirror() method should be called.
      Parameters:
      mirror - Whether to read version and format information mirrored.
    • mirror

      void mirror()
      Mirror the bit matrix in order to attempt a second reading.