Field Detail

• rowUnfiltered

  protected byte[] rowUnfiltered

• rowUnfilteredPrev

  protected byte[] rowUnfilteredPrev

• imgInfo

  protected final ImageInfo imgInfo

• deinterlacer

  protected final ar.com.hjg.pngj.Deinterlacer deinterlacer

Constructor Detail

• IdatSet

  public IdatSet(String id,
         ImageInfo iminfo,
         ar.com.hjg.pngj.Deinterlacer deinterlacer)

  Parameters:

  id - Chunk id (first chunk), should be shared by all concatenated chunks

  iminfo - Image info

  deinterlacer - Not null if interlaced

• IdatSet

  public IdatSet(String id,
         ImageInfo iminfo,
         ar.com.hjg.pngj.Deinterlacer deinterlacer,
         Inflater inf,
         byte[] buffer)

  Special constructor with preallocated buffer.

  Same as IdatSet(String, ImageInfo, Deinterlacer), but you can pass a Inflater (will be reset internally), and a buffer (will be used only if size is enough)

Method Detail

• unfilterRow

  public void unfilterRow()

  Applies PNG un-filter to inflated raw line. Result in getUnfilteredRow() DeflatedChunksSet.getRowLen()

• unfilterRow

  protected void unfilterRow(int nbytes)

• preProcessRow

  protected void preProcessRow()

  does the unfiltering of the inflated row, and updates row info

  Overrides:

  preProcessRow in class DeflatedChunksSet

• processRowCallback

  protected int processRowCallback()

  Method for async/callback mode .

  In callback mode will be called as soon as each row is retrieved (inflated and unfiltered), after preProcessRow()

  This is a dummy implementation that does nothing.

  The return value is essential

  Overrides:

  processRowCallback in class DeflatedChunksSet

  Returns:

  Length of next row, in bytes (including filter byte), non-positive if done

• advanceToNextRow

  public int advanceToNextRow()

  Signals that we are done with the previous row, begin reading the next one.

  In polled mode, calls setNextRowLen()

  Warning: after calling this, the unfilterRow is invalid!

  Returns:

  Returns nextRowLen

• isRowReady

  public boolean isRowReady()

  Description copied from class: DeflatedChunksSet
  In this state, the object is waiting the caller to retrieve inflated data

  Effective length: see DeflatedChunksSet.getRowFilled()

  Overrides:

  isRowReady in class DeflatedChunksSet

• getUnfilteredRow

  public byte[] getUnfilteredRow()

  Unfiltered row.

  This should be called only if isRowReady() returns true.

  To get real length, use DeflatedChunksSet.getRowLen()

  Returns:

  Unfiltered row, includes filter byte

• getDeinterlacer

  public ar.com.hjg.pngj.Deinterlacer getDeinterlacer()