Examples of java.awt.image.BandedSampleModel

java.awt.image.BandedSampleModel
This class represents image data which is stored in a band interleaved fashion and for which each sample of a pixel occupies one data element of the DataBuffer. It subclasses ComponentSampleModel but provides a more efficent implementation for accessing band interleaved image data than is provided by ComponentSampleModel. This class should typically be used when working with images which store sample data for each band in a different bank of the DataBuffer. Accessor methods are provided so that image data can be manipulated directly. Pixel stride is the number of data array elements between two samples for the same band on the same scanline. The pixel stride for a BandedSampleModel is one. Scanline stride is the number of data array elements between a given sample and the corresponding sample in the same column of the next scanline. Band offsets denote the number of data array elements from the first data array element of the bank of the DataBuffer holding each band to the first sample of the band. The bands are numbered from 0 to N-1. Bank indices denote the correspondence between a bank of the data buffer and a band of image data. This class supports {@link DataBuffer#TYPE_BYTE TYPE_BYTE}, {@link DataBuffer#TYPE_USHORT TYPE_USHORT}, {@link DataBuffer#TYPE_SHORT TYPE_SHORT}, {@link DataBuffer#TYPE_INT TYPE_INT}, {@link DataBuffer#TYPE_FLOAT TYPE_FLOAT}, and {@link DataBuffer#TYPE_DOUBLE TYPE_DOUBLE} datatypes

   * 
   * @param harness  the test harness (<code>null</code> not permitted). 
   */
  public void test(TestHarness harness)        
  {
    BandedSampleModel m1 = new BandedSampleModel(DataBuffer.TYPE_SHORT, 10, 20, 
      10, new int[] {2, 1, 0}, new int[] {4, 5, 6});
    BandedSampleModel m2 = (BandedSampleModel) m1.createSubsetSampleModel(new int[] {0, 1});
    harness.check(m2.getDataType(), DataBuffer.TYPE_SHORT);
    harness.check(m2.getWidth(), 10);
    harness.check(m2.getHeight(), 20);
    harness.check(m2.getNumBands(), 2);
    harness.check(m2.getBandOffsets()[0], 4);
    harness.check(m2.getBandOffsets()[1], 5);   
    
    // try more bands than available
    boolean pass = false;
    try
    {

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   * @param harness  the test harness (<code>null</code> not permitted). 
   */
  public void test(TestHarness harness)        
  {
    // simply check that two identical models have the same hash code
    BandedSampleModel m1 = new BandedSampleModel(DataBuffer.TYPE_INT, 2, 3, 2);
    BandedSampleModel m2 = new BandedSampleModel(DataBuffer.TYPE_INT, 2, 3, 2);
    harness.check(m1.hashCode(), m2.hashCode());
  }

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   * 
   * @param harness  the test harness (<code>null</code> not permitted). 
   */
  public void test(TestHarness harness)        
  {
    BandedSampleModel m = new BandedSampleModel(DataBuffer.TYPE_INT, 2, 3, 2);
    DataBufferInt b = new DataBufferInt(6, 2);
    b.setElem(0, 0, 0xA0);
    b.setElem(0, 1, 0xA1);
    b.setElem(0, 2, 0xA2);
    b.setElem(0, 3, 0xA3);
    b.setElem(0, 4, 0xA4);
    b.setElem(0, 5, 0xA5);
    b.setElem(1, 0, 0xB0);
    b.setElem(1, 1, 0xB1);
    b.setElem(1, 2, 0xB2);
    b.setElem(1, 3, 0xB3);
    b.setElem(1, 4, 0xB4);
    b.setElem(1, 5, 0xB5);
    
    int[] samples = m.getSamples(1, 1, 1, 2, 0, (int[]) null, b);
    harness.check(samples[0], 0xA3);
    harness.check(samples[1], 0xA5);
    
    samples = m.getSamples(1, 1, 1, 2, 1, (int[]) null, b);
    harness.check(samples[0], 0xB3);
    harness.check(samples[1], 0xB5);
    
    // check negative x
    boolean pass = false;
    try
    {
      m.getSamples(-1, 1, 1, 2, 1, (int[]) null, b);   
    }
    catch (ArrayIndexOutOfBoundsException e)
    {
      pass = true;   
    }
    harness.check(pass);
    
    // check negative y
    pass = false;
    try
    {
      m.getSamples(1, -1, 1, 2, 1, (int[]) null, b);   
    }
    catch (ArrayIndexOutOfBoundsException e)
    {
      pass = true;   
    }
    harness.check(pass);
    
    // check negative w
    pass = false;
    try
    {
      m.getSamples(1, 1, -1, 2, 1, (int[]) null, b);   
    }
    catch (NegativeArraySizeException e)
    {
      pass = true;   
    }
    harness.check(pass);
    
    // check negative h
    pass = false;
    try
    {
      m.getSamples(1, 1, 1, -1, 1, (int[]) null, b);   
    }
    catch (NegativeArraySizeException e)
    {
      pass = true;   
    }
    harness.check(pass);
    
    // check null data buffer
    pass = false;
    try
    {
      m.getSamples(1, 1, 1, 1, 1, (int[]) null, null);   
    }
    catch (NullPointerException e)
    {
      pass = true;   
    }

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        // in-memory format of the image to a type that we know the
        // operator likes. This is not fool proof. It converts all images
        // into non-indexed representations that have a byte pixel width
        ImageLayout layout = new ImageLayout();
        layout.setSampleModel(
            new BandedSampleModel(DataBuffer.TYPE_BYTE,
                                  src.getWidth(),
                                  src.getHeight(),
                                  src.getColorModel().getNumColorComponents()));
        // set up the rendering hints object that is passed to the format
        // operation to effect this change.

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                                                     hasAlpha,
                                                     isAlphaPremultiplied);


            int w = 1;
            int h = 1;
            this.sampleModel = new BandedSampleModel(dataType,
                                                     w, h,
                                                     w,
                                                     bankIndices,
                                                     bandOffsets);
        }

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                                                     hasAlpha,
                                                     isAlphaPremultiplied);


            int w = 1;
            int h = 1;
            this.sampleModel = new BandedSampleModel(dataType,
                                                     w, h,
                                                     w,
                                                     bankIndices,
                                                     bandOffsets);
        }

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                                          int tileWidth,
                                          int tileHeight,
                                          int[] bankIndices,
                                          int[] bandOffsets) {
        SampleModel sm =
            new BandedSampleModel(dataType,
                                  tileWidth, tileHeight,
                                  tileWidth,
                                  bankIndices,
                                  bandOffsets);
        return new TiledImage(minX, minY, width, height,

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                "ushort DataBuffers");
        }
        DataBufferUShort dbus = (DataBufferUShort)dataBuffer;


        if (sampleModel instanceof BandedSampleModel) {
            BandedSampleModel bsm = (BandedSampleModel)sampleModel;
            this.scanlineStride = bsm.getScanlineStride();
            int bankIndices[] = bsm.getBankIndices();
            int bandOffsets[] = bsm.getBandOffsets();
            int dOffsets[] = dbus.getOffsets();
            dataOffsets = new int[bankIndices.length];
            data = new short[bankIndices.length][];
            int xOffset = aRegion.x - origin.x;
            int yOffset = aRegion.y - origin.y;

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                "byte DataBuffers");
        }
        DataBufferByte dbb = (DataBufferByte)dataBuffer;


        if (sampleModel instanceof BandedSampleModel) {
            BandedSampleModel bsm = (BandedSampleModel)sampleModel;
            this.scanlineStride = bsm.getScanlineStride();
            int bankIndices[] = bsm.getBankIndices();
            int bandOffsets[] = bsm.getBandOffsets();
            int dOffsets[] = dbb.getOffsets();
            dataOffsets = new int[bankIndices.length];
            data = new byte[bankIndices.length][];
            int xOffset = aRegion.x - origin.x;
            int yOffset = aRegion.y - origin.y;

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                                                     hasAlpha,
                                                     isAlphaPremultiplied);


            int w = 1;
            int h = 1;
            this.sampleModel = new BandedSampleModel(dataType,
                                                     w, h,
                                                     w,
                                                     bankIndices,
                                                     bandOffsets);
        }

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