Package com.aowagie.text.pdf

Class LZWDecoder

java.lang.Object
com.aowagie.text.pdf.LZWDecoder
class LZWDecoder extends Object
A class for performing LZW decoding.

  • Field Details

    • stringTable

      private byte[][] stringTable

    • data

      private byte[] data

    • uncompData

      private OutputStream uncompData

    • tableIndex

      private int tableIndex

    • bitsToGet

      private int bitsToGet

    • bytePointer

      private int bytePointer

    • bitPointer

      private int bitPointer

    • nextData

      private int nextData

    • nextBits

      private int nextBits

    • andTable

      private final int[] andTable

  • Constructor Details

    • LZWDecoder

      public LZWDecoder()

  • Method Details

    • decode

      public void decode(byte[] data, OutputStream uncompData)
      Method to decode LZW compressed data.
      Parameters:
      data - The compressed data.
      uncompData - Array to return the uncompressed data in.

    • initializeStringTable

      private void initializeStringTable()
      Initialize the string table.

    • writeString

      private void writeString(byte[] string)
      Write out the string just uncompressed.

    • addStringToTable

      private void addStringToTable(byte[] oldString, byte newString)
      Add a new string to the string table.

    • addStringToTable

      private void addStringToTable(byte[] string)
      Add a new string to the string table.

    • composeString

      private byte[] composeString(byte[] oldString, byte newString)
      Append newString to the end of oldString.

    • getNextCode

      public int getNextCode()