Examples of java.awt.image.DataBuffer

java.awt.image.DataBuffer
This class exists to wrap one or more data arrays. Each data array in the DataBuffer is referred to as a bank. Accessor methods for getting and setting elements of the DataBuffer's banks exist with and without a bank specifier. The methods without a bank specifier use the default 0th bank. The DataBuffer can optionally take an offset per bank, so that data in an existing array can be used even if the interesting data doesn't start at array location zero. Getting or setting the 0th element of a bank, uses the (0+offset)th element of the array. The size field specifies how much of the data array is available for use. Size + offset for a given bank should never be greater than the length of the associated data array. The data type of a data buffer indicates the type of the data array(s) and may also indicate additional semantics, e.g. storing unsigned 8-bit data in elements of a byte array. The data type may be TYPE_UNDEFINED or one of the types defined below. Other types may be added in the future. Generally, an object of class DataBuffer will be cast down to one of its data type specific subclasses to access data type specific methods for improved performance. Currently, the Java 2D(tm) API image classes use TYPE_BYTE, TYPE_USHORT, TYPE_INT, TYPE_SHORT, TYPE_FLOAT, and TYPE_DOUBLE DataBuffers to store image data. @see java.awt.image.Raster @see java.awt.image.SampleModel

    public BufferedImageSurface(BufferedImage image) {
        super(image.getWidth(), image.getHeight());
        this.model = image.getColorModel();
        this.sImage = image;
        final Raster raster = image.getRaster();
        final DataBuffer dataBuffer = raster.getDataBuffer();
        final SampleModel sampleModel = raster.getSampleModel();
        if (sampleModel instanceof SinglePixelPackedSampleModel) {
            final SinglePixelPackedSampleModel sppSM = (SinglePixelPackedSampleModel) sampleModel;
            final int dataType = dataBuffer.getDataType();
            final int dataTypeSize = DataBuffer.getDataTypeSize(dataType);
            this.bitmapGraphics = BitmapGraphics.createInstance(dataBuffer, width, height,
                sppSM.getScanlineStride() * dataTypeSize / 8, model.getTransparency());
        } else {
            this.bitmapGraphics = null;

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        if (y + recSize > height){
          h = height - y;
        }
        Rectangle r = new Rectangle(x, y, w, h);
        Raster rs = gcRaw.getRenderedImage().getData(r);
        DataBuffer df  = rs.getDataBuffer();
        for (int i = 0; i < df.getSize(); i ++){
          Double v = df.getElemDouble(i);
          if (!ignoreset.contains(v)){
            data.add(v);
          }
        }
      }

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          h = height - y;
        }
        Rectangle r = new Rectangle(x, y, w, h);
        
        Raster rs = gcRaw.getRenderedImage().getData(r);
        DataBuffer df  = rs.getDataBuffer();
        for (int i = 0; i < df.getSize(); i ++){
          results.add(df.getElemDouble(i));
          if (results.size() >= SingleBandEditorPage.MAX_ENTRIES){
            errorMessage = MessageFormat.format(Messages.UniqueValuesDialog_MaxValueError, SingleBandEditorPage.MAX_ENTRIES);
            maxReached = true;
            break;
          }

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                graphics.drawImage(image, 0, 0, null);
                graphics.dispose();
                image = packedImage;
            }


            DataBuffer dBuf = image.getData().getDataBuffer();
            if (dBuf.getDataType() == DataBuffer.TYPE_BYTE)
            {
                decoded.write(((DataBufferByte) dBuf).getData());
            }
            else
            {

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   * @param harness  the test harness (<code>null</code> not permitted).
   */
  public void test(TestHarness harness)      
  {
    // check simple case
    DataBuffer b1 = new DataBufferInt(new int[] {1, 2, 3}, 3, 1);
    harness.check(b1.getOffset() == 1);


    // check that offset reflects setting in array
    DataBuffer b2 = new DataBufferInt(new int[][] {{1, 2, 3, 4}, {5, 6, 7, 8}}, 2, new int[] {1 , 2});
    harness.check(b2.getOffset() == 1);
  }

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   * @param harness  the test harness (<code>null</code> not permitted).
   */
  public void test(TestHarness harness)      
  {
    // 
    DataBuffer b1 = new DataBufferInt(new int[] {1, 2, 3}, 3, 1);
    int[] offsets = b1.getOffsets();
    harness.check(offsets.length == 1);
    harness.check(offsets[0] == 1);
  }

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  }
  
  private void test1(TestHarness harness)
  {
    harness.checkPoint("(int, int, int, double, DataBuffer)");  
    DataBuffer db = new DataBufferDouble(12);
    ComponentSampleModel m = new ComponentSampleModel(DataBuffer.TYPE_DOUBLE,
            3, 2, 2, 6, new int[] {0, 1});
    m.setSample(2, 1, 0, 99.9, db);
    harness.check(db.getElem(0, 10), 99.0d);
    m.setSample(2, 1, 1, 88.8, db);
    harness.check(db.getElem(0, 11), 88.0d);
    
    // what happens if the data buffer doesn't hold doubles?
    DataBuffer db2 = new DataBufferInt(12);
    m.setSample(2, 1, 0, 99.9d, db2);
    harness.check(db2.getElem(0, 10), 99);
    m.setSample(2, 1, 1, 88.8d, db2);
    harness.check(db2.getElem(0, 11), 88); 


    // check that a null data buffer generates a NullPointerException
    boolean pass = false;
    try
      {

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  public void testMethod1(TestHarness harness)
  {
    harness.checkPoint("(int, int, int, int, int, int[], DataBuffer)");
    SampleModel m = new SinglePixelPackedSampleModel(DataBuffer.TYPE_BYTE, 10, 
            20, new int[] { 224, 28, 3 });
    DataBuffer db = m.createDataBuffer();
    int[] samples = new int[6];
    m.getSamples(1, 2, 2, 3, 1, samples, db);
    harness.check(Arrays.equals(samples, new int[] {0, 0, 0, 0, 0, 0}));
    m.setSamples(1, 2, 2, 3, 0, new int[] {1, 2, 3, 4 ,5 ,6}, db);
    m.getSamples(1, 2, 2, 3, 0, samples, db);

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  public void testMethod2(TestHarness harness)
  {
    harness.checkPoint("(int, int, int, int, int, float[], DataBuffer)");     
    SampleModel m = new SinglePixelPackedSampleModel(DataBuffer.TYPE_BYTE, 10, 
            20, new int[] { 224, 28, 3 });
    DataBuffer db = m.createDataBuffer();
    float[] samples = new float[6];
    m.getSamples(1, 2, 2, 3, 1, samples, db);
    harness.check(Arrays.equals(samples, new float[] {0, 0, 0, 0, 0, 0}));
    m.setSamples(1, 2, 2, 3, 0, new float[] {1, 2, 3, 4 ,5 ,6}, db);
    m.getSamples(1, 2, 2, 3, 0, samples, db);

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  public void testMethod3(TestHarness harness)
  {
    harness.checkPoint("(int, int, int, int, int, double[], DataBuffer)");     
    SampleModel m = new SinglePixelPackedSampleModel(DataBuffer.TYPE_BYTE, 10, 
            20, new int[] { 224, 28, 3 });
    DataBuffer db = m.createDataBuffer();
    double[] samples = new double[6];
    m.getSamples(1, 2, 2, 3, 1, samples, db);
    harness.check(Arrays.equals(samples, new double[] {0, 0, 0, 0, 0, 0}));
    m.setSamples(1, 2, 2, 3, 0, new double[] {1, 2, 3, 4 ,5 ,6}, db);
    m.getSamples(1, 2, 2, 3, 0, samples, db);

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