Examples of java.awt.image.ComponentSampleModel

java.awt.image.ComponentSampleModel
This class represents image data which is stored such that each sample of a pixel occupies one data element of the DataBuffer. It stores the N samples which make up a pixel in N separate data array elements. Different bands may be in different banks of the DataBuffer. Accessor methods are provided so that image data can be manipulated directly. This class can support different kinds of interleaving, e.g. band interleaving, scanline interleaving, and pixel interleaving. Pixel stride is the number of data array elements between two samples for the same band on the same scanline. 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. This class can represent image data for which each sample is an unsigned integral number which can be stored in 8, 16, or 32 bits (using DataBuffer.TYPE_BYTE, DataBuffer.TYPE_USHORT, or DataBuffer.TYPE_INT, respectively), data for which each sample is a signed integral number which can be stored in 16 bits (using DataBuffer.TYPE_SHORT), or data for which each sample is a signed float or double quantity (using DataBuffer.TYPE_FLOAT or DataBuffer.TYPE_DOUBLE, respectively). All samples of a given ComponentSampleModel are stored with the same precision. All strides and offsets must be non-negative. 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}, {@link DataBuffer#TYPE_DOUBLE TYPE_DOUBLE}, @see java.awt.image.PixelInterleavedSampleModel @see java.awt.image.BandedSampleModel

  public void test(TestHarness harness)
  {
    DataBuffer db = new DataBufferInt(12);
    for (int i = 0; i < 12; i++)
      db.setElem(i, i);
    ComponentSampleModel m = new ComponentSampleModel(DataBuffer.TYPE_INT,
            3, 2, 2, 6, new int[] {0, 1});
    int[] pixels = m.getPixels(1, 0, 2, 1, (int[]) null, db);
    harness.check(pixels.length, 4);
    harness.check(pixels[0], 2);
    harness.check(pixels[1], 3);
    harness.check(pixels[2], 4);
    harness.check(pixels[3], 5);
    
    // try passing in a result array
    int[] result = new int[4];
    pixels = m.getPixels(1, 1, 2, 1, result, db);
    harness.check(pixels[0], 8);
    harness.check(pixels[1], 9);
    harness.check(pixels[2], 10);
    harness.check(pixels[3], 11);
    harness.check(pixels == result);
    
    // try null data buffer
    boolean pass = false;
    try
      {
        m.getPixels(1, 1, 2, 1, result, null);
      }
    catch (NullPointerException e)
      {
        pass = true;  
      }

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public class createSubsetSampleModel implements Testlet
{
  public void test(TestHarness harness)
  {
    ComponentSampleModel m1 = new ComponentSampleModel(DataBuffer.TYPE_INT, 22, 
            11, 2, 44, new int[] {0, 1});
    SampleModel m2 = m1.createSubsetSampleModel(new int[] {1});
    harness.check(m2 instanceof ComponentSampleModel);
    harness.check(m2.getDataType(), DataBuffer.TYPE_INT);
    harness.check(m2.getWidth(), 22);
    harness.check(m2.getHeight(), 11);
    harness.check(m2.getNumBands(), 1);

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public class hashCode implements Testlet
{
  public void test(TestHarness harness)
  {
    // equal instances should have equal hashCodes...
    ComponentSampleModel m1 = new ComponentSampleModel(DataBuffer.TYPE_INT, 
            10, 20, 3, 3, new int[] {0, 1, 2});
    ComponentSampleModel m2 = new ComponentSampleModel(DataBuffer.TYPE_INT, 
            10, 20, 3, 3, new int[] {0, 1, 2});
    harness.check(m1.equals(m2));
    harness.check(m1.hashCode(), m2.hashCode());
  }

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  public void test(TestHarness harness)
  {
    DataBuffer db = new DataBufferInt(12);
    for (int i = 0; i < 12; i++)
      db.setElem(i, i);
    ComponentSampleModel m = new ComponentSampleModel(DataBuffer.TYPE_INT,
            3, 2, 2, 6, new int[] {0, 1});
    int[] samples = m.getSamples(0, 1, 2, 1, 0, (int[]) null, db);
    harness.check(samples.length, 2);
    harness.check(samples[0], 6);
    harness.check(samples[1], 8);
    
    // try passing in a result array
    int[] result = new int[2];
    samples = m.getSamples(0, 1, 2, 1, 1, result, db);
    harness.check(samples.length, 2);
    harness.check(samples[0], 7);
    harness.check(samples[1], 9);
    harness.check(samples == result);
    
    // try null data buffer
    boolean pass = false;
    try
      {
        m.getSamples(0, 1, 2, 1, 1, result, null);
      }
    catch (NullPointerException e)
      {
        pass = true;  
      }

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public class getBandOffsets implements Testlet
{
  public void test(TestHarness harness)
  {
    int[] bo = new int[] {1, 2};
    ComponentSampleModel m1 = new ComponentSampleModel(DataBuffer.TYPE_INT, 22, 
            33, 1, 23, bo);
    int[] bo1 = m1.getBandOffsets();
    harness.check(Arrays.equals(bo1, new int[] {1, 2}));
    int[] bo2 = m1.getBandOffsets();
    harness.check(bo1 != bo2);
    bo[1] = 3;
    harness.check(m1.getBandOffsets()[1], 2);
  }

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        if(masks[0] != 0x00ff0000) return false;
        if(masks[1] != 0x0000ff00) return false;
        if(masks[2] != 0x000000ff) return false;
        if(masks[3] != 0xff000000) return false;
 
        ComponentSampleModel csm;
        csm = (ComponentSampleModel)alpSM;
        if (csm.getNumBands()    != 1) return false;
        if (csm.getPixelStride() != 1) return false;


        return true;
   }

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        Rectangle rgn = wr.getBounds();
        rgn = rgn.intersection(alphaRed.getBounds());
            
        Raster r = alphaRed.getData(rgn);


        ComponentSampleModel csm;
        csm = (ComponentSampleModel)r.getSampleModel();
        final int alpScanStride = csm.getScanlineStride();


        DataBufferByte alpDB   = (DataBufferByte)r.getDataBuffer();
        final int      alpBase 
            = (alpDB.getOffset() + 
               csm.getOffset(rgn.x-r.getSampleModelTranslateX(), 
                             rgn.y-r.getSampleModelTranslateY()));


            
          // Access the pixel data array
        final byte alpPixels[] = alpDB.getBankData()[0];

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        boolean preMult  = srcCM.isAlphaPremultiplied();
        if (!hasAlpha)
            preMult = false;


        if (sm instanceof ComponentSampleModel) {
            ComponentSampleModel csm = (ComponentSampleModel)sm;


            int [] bitsPer = new int[bands];
            for (int i=0; i<bands; i++)
                bitsPer[i] = bits;

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    protected static void divide_BYTE_COMP_Data(WritableRaster wr) {
        // System.out.println("Multiply Int: " + wr);


        ComponentSampleModel csm;
        csm = (ComponentSampleModel)wr.getSampleModel();


        final int width = wr.getWidth();


        final int scanStride = csm.getScanlineStride();
        final int pixStride  = csm.getPixelStride();
        final int [] bandOff = csm.getBandOffsets();


        DataBufferByte db = (DataBufferByte)wr.getDataBuffer();
        final int base
            = (db.getOffset() +
               csm.getOffset(wr.getMinX()-wr.getSampleModelTranslateX(),
                             wr.getMinY()-wr.getSampleModelTranslateY()));




        int a=0;
        int aOff = bandOff[bandOff.length-1];

View Full Code Here

    }


    protected static void mult_BYTE_COMP_Data(WritableRaster wr) {
        // System.out.println("Multiply Int: " + wr);


        ComponentSampleModel csm;
        csm = (ComponentSampleModel)wr.getSampleModel();


        final int width = wr.getWidth();


        final int scanStride = csm.getScanlineStride();
        final int pixStride  = csm.getPixelStride();
        final int [] bandOff = csm.getBandOffsets();


        DataBufferByte db = (DataBufferByte)wr.getDataBuffer();
        final int base
            = (db.getOffset() +
               csm.getOffset(wr.getMinX()-wr.getSampleModelTranslateX(),
                             wr.getMinY()-wr.getSampleModelTranslateY()));




        int a=0;
        int aOff = bandOff[bandOff.length-1];

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