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


    /**
     * Recycle the given tile.
     */
    public void recycleTile(Raster tile) {
        DataBuffer db = tile.getDataBuffer();


        Long key = new Long(((long)db.getDataType() << 56) |
                            ((long)db.getNumBanks() << 32) |
                            (long)db.getSize());


        if(DEBUG) {
            System.out.println("Recycling array for: "+
                               db.getDataType()+" "+
                               db.getNumBanks()+" "+
                               db.getSize());
            //System.out.println("recycleTile(); key = "+key);
        }


        synchronized(recycledArrays) {
            Object value = recycledArrays.get(key);
            ArrayList arrays = null;
            if(value != null) {
                arrays = (ArrayList)value;
            } else {
                arrays = new ArrayList();
            }


            memoryUsed += getDataBankSize(db.getDataType(),
                                          db.getNumBanks(),
                                          db.getSize());


            arrays.add(getBankReference(db));


            if(value == null) {
                recycledArrays.put(key, arrays);

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            break;
        default:
            throw new IllegalArgumentException("dataType == "+dataType+"!");
        }


        DataBuffer dataBuffer = null;
        try {
            Constructor constructor = dbClass.getConstructor(paramTypes);
            dataBuffer = (DataBuffer)constructor.newInstance(paramValues);
        } catch(Exception e) {
            throw new RuntimeException(JaiI18N.getString("DataBufferUtils1"));

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        this.tileCacheMetric = tileCacheMetric;  // may be null


        key = hashKey(owner, tileX, tileY);


        // tileMemorySize(Raster tile) inlined for performance
        DataBuffer db = tile.getDataBuffer();
        memorySize = db.getDataTypeSize(db.getDataType()) / 8L *
                     db.getSize() * db.getNumBanks();


    }

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        if(location == null) {
           location = new Point(0,0);
        }


        DataBuffer db = null;


        int type = sampleModel.getTransferType();
        long numBanks = 0;
        long size = 0;

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    /**
     * Recycle the given tile.
     */
    public void recycleTile(Raster tile) {
        DataBuffer db = tile.getDataBuffer();


        Long key = new Long(((long)db.getDataType() << 56) |
                            ((long)db.getNumBanks() << 32) |
                            (long)db.getSize());


        if(DEBUG) {
            System.out.println("Recycling array for: "+
                               db.getDataType()+" "+
                               db.getNumBanks()+" "+
                               db.getSize());
            //System.out.println("recycleTile(); key = "+key);
        }


        synchronized(recycledArrays) {
            Object value = recycledArrays.get(key);
            ArrayList arrays = null;
            if(value != null) {
                arrays = (ArrayList)value;
            } else {
                arrays = new ArrayList();
            }


            memoryUsed += getDataBankSize(db.getDataType(),
                                          db.getNumBanks(),
                                          db.getSize());


            arrays.add(getBankReference(db));


            if(value == null) {
                recycledArrays.put(key, arrays);

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  // Get the data array out of the DataBuffer
  byte bdata[] = null;
  short sdata[] = null;
  int idata[] = null;
  float fdata[] = null;
  DataBuffer buffer = sampleModel.createDataBuffer();


  int dataType = sampleModel.getDataType();
  if (dataType == DataBuffer.TYPE_BYTE) {
      bdata = ((DataBufferByte)buffer).getData();
  } else if (dataType == DataBuffer.TYPE_USHORT) {
      sdata = ((DataBufferUShort)buffer).getData();
  } else if (dataType == DataBuffer.TYPE_SHORT) {
      sdata = ((DataBufferShort)buffer).getData();
  } else if (dataType == DataBuffer.TYPE_INT) {
      idata = ((DataBufferInt)buffer).getData();
  } else if (dataType == DataBuffer.TYPE_FLOAT) {
            if(buffer instanceof DataBufferFloat) {
                fdata = ((DataBufferFloat)buffer).getData();
            } else {
                // This is a hack to make this work with JAI which in some
                // cases downcasts the DataBuffer to a type-specific class.
                // In the case of float data this current means the JAI class
                // com.lightcrafts.mediax.jai.DataBufferFloat.
                try {
                    Method getDataMethod =
                        buffer.getClass().getMethod("getData", null);
                    fdata = (float[])getDataMethod.invoke(buffer, null);
                } catch(Exception e) {
                    String message = JaiI18N.getString("TIFFImage18");
                    ImagingListenerProxy.errorOccurred(message,
                                           new ImagingException(message, e),

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    @Override
    public void append(BufferedImage img, int lines) throws IOException {


      /* get raw data of image */
      DataBuffer imageDataBuffer = img.getRaster().getDataBuffer();
      int[] data = (((DataBufferInt)imageDataBuffer).getData());
      
      /* create one ImageLine that will be refilled and written to png */
      ImageLineByte bline = new ImageLineByte(imgInfo);
      byte[] line = bline.getScanline();

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      // collect and write content


      ByteBuffer writeBuffer = ByteBuffer.allocate(
          3 * img.getWidth() * lines);
      
      DataBuffer imageDataBuffer = img.getRaster().getDataBuffer();
      int[] data = (((DataBufferInt)imageDataBuffer).getData());
      
      for (int i = 0; i < img.getWidth() * lines; i++) {
        int value = data[i];
        writeBuffer.put((byte)(value >>> 16));

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                    intDataArrays[i] = dbi.getData(bankIndices[i]);
                }
                break;


            case DataBuffer.TYPE_FLOAT:
                DataBuffer dbf = (DataBuffer)raster.getDataBuffer();
                floatDataArrays = new float[numBands][];
                for (int i = 0; i < numBands; i++) {
                    floatDataArrays[i] =
                        DataBufferUtils.getDataFloat(dbf, bankIndices[i]);
                }
                break;


            case DataBuffer.TYPE_DOUBLE:
                DataBuffer dbd = (DataBuffer)raster.getDataBuffer();
                doubleDataArrays = new double[numBands][];
                for (int i = 0; i < numBands; i++) {
                    doubleDataArrays[i] =
                        DataBufferUtils.getDataDouble(dbd, bankIndices[i]); 
                }

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            theObject = null;
            return;
        }


        // Restore the DataBuffer from its serialized form.
        DataBuffer dataBuffer = (DataBuffer)dataBufferState.getObject();


        // Reconstruct the Raster.
        theObject = Raster.createRaster(sampleModel, dataBuffer, location);
    }

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