Class CompressesRasterWriter

Object
CompressesRasterWriter

public class CompressesRasterWriter extends Object
Write compressed JGrass rasters to disk
Since:
1.1.0
Author:
Andrea Antonello (www.hydrologis.com)
  • Constructor Details

    • CompressesRasterWriter

      public CompressesRasterWriter(int _outputToDiskType, double _novalue, boolean _jump, double[] _range, long _pointerInFilePosition, long[] _rowaddresses, JGrassRegion _dataWindow, ProgressListener monitor, String mapName)
      Preparing the environment for compressing and writing the map to disk
  • Method Details

    • compressAndWrite

      public void compressAndWrite(ImageOutputStream theCreatedFile, ImageOutputStream theCreatedNullFile, RenderedImage renderedImage) throws IOException
      Compress and write data from a map iterator.

      This method converts every single row of the buffer of values to bytes, as needed by the deflater. Then the byterows are compressed and then written to file. Every rows first byte carries the information about compression (0 = not compressed, 1 = compressed). At the begin the place for the header is written to file, in the end the header is re-written with the right rowaddresses (at the begin we do not know how much compression will influence).

      Parameters:
      theCreatedFile - - handler for the main map file
      theCreatedNullFile - - handler for the file of the null map (in cell_misc)
      Throws:
      IOException
    • getDataWindow

      public JGrassRegion getDataWindow()
    • isJump

      public boolean isJump()
    • getNovalue

      public double getNovalue()
    • getOutputToDiskType

      public int getOutputToDiskType()
    • getPointerInFilePosition

      public long getPointerInFilePosition()
    • getRange

      public double[] getRange()
    • getRowaddresses

      public long[] getRowaddresses()