java.awt.image.SampleModel Java Examples

public boolean canEncodeImage(ImageTypeSpecifier type) {
    int dataType= type.getSampleModel().getDataType();
    if (dataType < DataBuffer.TYPE_BYTE || dataType > DataBuffer.TYPE_INT)
        return false;

    SampleModel sm = type.getSampleModel();
    int numBands = sm.getNumBands();
    if (!(numBands == 1 || numBands == 3))
        return false;

    if (numBands == 1 && dataType != DataBuffer.TYPE_BYTE)
        return false;

    if (dataType > DataBuffer.TYPE_BYTE &&
          !(sm instanceof SinglePixelPackedSampleModel))
        return false;

    return true;
}
 

private static void makeImage() {
    int scanLineBytes = WIDTH / PIXELS_IN_BYTE;
    if ((WIDTH & (PIXELS_IN_BYTE - 1)) != 0) {
        // Make sure all the pixels in a scan line fit
        scanLineBytes += 1;
    }

    byte[]     bits    = new byte[scanLineBytes * HEIGHT];
    DataBuffer dataBuf = new DataBufferByte(bits, bits.length, 0);
    SampleModel sampleModel = new MultiPixelPackedSampleModel(DataBuffer.TYPE_BYTE,
                                                              WIDTH, HEIGHT, BITS_PER_PIXEL);
    WritableRaster raster = Raster.createWritableRaster(sampleModel, dataBuf, null);
    IndexColorModel indexModel = new IndexColorModel(2, 2, RED, GREEN, BLUE);
    BufferedImage bufImage = new BufferedImage(indexModel, raster,
                                               indexModel.isAlphaPremultiplied(), null);

    Graphics g = bufImage.getGraphics();
    g.drawRect(0, 0, WIDTH - 1, HEIGHT - 1);
    g.dispose();
}
 

public static long getBandSize(SampleModel sm) {
    int elementSize = DataBuffer.getDataTypeSize(sm.getDataType());

    if (sm instanceof ComponentSampleModel) {
        ComponentSampleModel csm = (ComponentSampleModel)sm;
        int pixelStride = csm.getPixelStride();
        int scanlineStride = csm.getScanlineStride();
        long size = Math.min(pixelStride, scanlineStride);

        if (pixelStride > 0)
            size += pixelStride * (sm.getWidth() - 1);
        if (scanlineStride > 0)
            size += scanlineStride * (sm.getHeight() - 1);
        return size * ((elementSize + 7) / 8);
    } else
        return getTileSize(sm);
}
 

public boolean canEncodeImage(ImageTypeSpecifier type) {
    int dataType= type.getSampleModel().getDataType();
    if (dataType < DataBuffer.TYPE_BYTE || dataType > DataBuffer.TYPE_INT)
        return false;

    SampleModel sm = type.getSampleModel();
    int numBands = sm.getNumBands();
    if (!(numBands == 1 || numBands == 3))
        return false;

    if (numBands == 1 && dataType != DataBuffer.TYPE_BYTE)
        return false;

    if (dataType > DataBuffer.TYPE_BYTE &&
          !(sm instanceof SinglePixelPackedSampleModel))
        return false;

    return true;
}
 

public boolean canEncodeImage(ImageTypeSpecifier type) {
    SampleModel sampleModel = type.getSampleModel();

    // Find the maximum bit depth across all channels
    int[] sampleSize = sampleModel.getSampleSize();
    int bitDepth = sampleSize[0];
    for (int i = 1; i < sampleSize.length; i++) {
        if (sampleSize[i] > bitDepth) {
            bitDepth = sampleSize[i];
        }
    }

    // 4450894: Ensure bitDepth is between 1 and 8
    if (bitDepth < 1 || bitDepth > 8) {
        return false;
    }

    return true;
}
 

public boolean canEncodeImage(ImageTypeSpecifier type) {
    if (type == null) {
        throw new IllegalArgumentException("type == null!");
    }

    SampleModel sm = type.getSampleModel();
    ColorModel cm = type.getColorModel();

    boolean canEncode = sm.getNumBands() == 1 &&
        sm.getSampleSize(0) <= 8 &&
        sm.getWidth() <= 65535 &&
        sm.getHeight() <= 65535 &&
        (cm == null || cm.getComponentSize()[0] <= 8);

    if (canEncode) {
        return true;
    } else {
        return PaletteBuilder.canCreatePalette(type);
    }
}
 

public static int getElementSize(SampleModel sm) {
    int elementSize = DataBuffer.getDataTypeSize(sm.getDataType());

    if (sm instanceof MultiPixelPackedSampleModel) {
        MultiPixelPackedSampleModel mppsm =
            (MultiPixelPackedSampleModel)sm;
        return mppsm.getSampleSize(0) * mppsm.getNumBands();
    } else if (sm instanceof ComponentSampleModel) {
        return sm.getNumBands() * elementSize;
    } else if (sm instanceof SinglePixelPackedSampleModel) {
        return elementSize;
    }

    return elementSize * sm.getNumBands();

}
 

public boolean canEncodeImage(ImageTypeSpecifier type) {
    if (type == null) {
        throw new IllegalArgumentException("type == null!");
    }

    SampleModel sm = type.getSampleModel();
    ColorModel cm = type.getColorModel();

    boolean canEncode = sm.getNumBands() == 1 &&
        sm.getSampleSize(0) <= 8 &&
        sm.getWidth() <= 65535 &&
        sm.getHeight() <= 65535 &&
        (cm == null || cm.getComponentSize()[0] <= 8);

    if (canEncode) {
        return true;
    } else {
        return PaletteBuilder.canCreatePalette(type);
    }
}
 

/**
 * Creates a Raster with the same layout but using a different
 * width and height, and with new zeroed data arrays.
 */
public WritableRaster createCompatibleWritableRaster(int w, int h) {
    if (w <= 0 || h <=0) {
        throw new RasterFormatException("negative "+
                                      ((w <= 0) ? "width" : "height"));
    }

    SampleModel sm = sampleModel.createCompatibleSampleModel(w, h);

    return new ByteComponentRaster(sm , new Point(0,0));

}
 

/**
 *  Constructs a ShortInterleavedRaster with the given SampleModel.
 *  The Raster's upper left corner is origin and it is the same
 *  size as the SampleModel.  A DataBuffer large enough to describe the
 *  Raster is automatically created.  SampleModel must be of type
 *  PixelInterleavedSampleModel or SinglePixelPackedSampleModel.
 *  @param sampleModel     The SampleModel that specifies the layout.
 *  @param origin          The Point that specified the origin.
 */
public ShortInterleavedRaster(SampleModel sampleModel, Point origin) {
    this(sampleModel,
         (DataBufferUShort) sampleModel.createDataBuffer(),
         new Rectangle(origin.x,
                       origin.y,
                       sampleModel.getWidth(),
                       sampleModel.getHeight()),
         origin,
         null);
}
 

public HistogramConfig(final SampleModel sampleModel) {
  final int numBands = sampleModel.getNumBands();
  highValues = new double[numBands];
  lowValues = new double[numBands];
  numBins = new int[numBands];
  for (int b = 0; b < numBands; b++) {
    final NumberRange range = TypeMap.getRange(TypeMap.getSampleDimensionType(sampleModel, b));
    int bins;
    double min = range.getMinimum(true);
    double max = range.getMaximum(true);
    if (Double.isInfinite(min)
        || Double.isInfinite(max)
        || Double.isNaN(min)
        || Double.isNaN(max)) {
      // in this case there is no reasonable default, just use a range
      // of 0 to 1 as a placeholder
      min = 0;
      max = 1;
      bins = MAX_DEFAULT_NUM_BINS;
    } else {
      bins = (int) Math.min(MAX_DEFAULT_NUM_BINS, (max - min) + 1);
    }
    lowValues[b] = min;
    highValues[b] = max;
    numBins[b] = bins;
  }
}
 

/**
 * Creates a Writable subRaster given a region of the Raster. The x and y
 * coordinates specify the horizontal and vertical offsets
 * from the upper-left corner of this Raster to the upper-left corner
 * of the subRaster.  A subset of the bands of the parent Raster may
 * be specified.  If this is null, then all the bands are present in the
 * subRaster. A translation to the subRaster may also be specified.
 * Note that the subRaster will reference the same
 * DataBuffers as the parent Raster, but using different offsets.
 * @param x               X offset.
 * @param y               Y offset.
 * @param width           Width (in pixels) of the subraster.
 * @param height          Height (in pixels) of the subraster.
 * @param x0              Translated X origin of the subraster.
 * @param y0              Translated Y origin of the subraster.
 * @param bandList        Array of band indices.
 * @exception RasterFormatException
 *            if the specified bounding box is outside of the parent Raster.
 */
public WritableRaster createWritableChild(int x, int y,
                                          int width, int height,
                                          int x0, int y0,
                                          int[] bandList) {
    if (x < this.minX) {
        throw new RasterFormatException("x lies outside the raster");
    }
    if (y < this.minY) {
        throw new RasterFormatException("y lies outside the raster");
    }
    if ((x+width < x) || (x+width > this.minX + this.width)) {
        throw new RasterFormatException("(x + width) is outside of Raster");
    }
    if ((y+height < y) || (y+height > this.minY + this.height)) {
        throw new RasterFormatException("(y + height) is outside of Raster");
    }

    SampleModel sm;

    if (bandList != null)
        sm = sampleModel.createSubsetSampleModel(bandList);
    else
        sm = sampleModel;

    int deltaX = x0 - x;
    int deltaY = y0 - y;

    return new ShortInterleavedRaster(sm,
                                   dataBuffer,
                                   new Rectangle(x0, y0, width, height),
                                   new Point(sampleModelTranslateX+deltaX,
                                             sampleModelTranslateY+deltaY),
                                   this);
}
 

/**
 * Constructs a IntegerComponentRaster with the given SampleModel
 * and DataBuffer.  The Raster's upper left corner is origin and
 * it is the same sizes the SampleModel.  The DataBuffer is not
 * initialized and must be a DataBufferInt compatible with SampleModel.
 * SampleModel must be of type SinglePixelPackedSampleModel.
 * @param sampleModel     The SampleModel that specifies the layout.
 * @param dataBuffer      The DataBufferInt that contains the image data.
 * @param origin          The Point that specifies the origin.
 */
public IntegerComponentRaster(SampleModel sampleModel,
                                 DataBuffer dataBuffer,
                                 Point origin) {
    this(sampleModel,
         dataBuffer,
         new Rectangle(origin.x,
                       origin.y,
                       sampleModel.getWidth(),
                       sampleModel.getHeight()),
         origin,
         null);
}
 

public static void main(String args[]) {
    BufferedImage src
        = new BufferedImage(1, 10, BufferedImage.TYPE_INT_ARGB);

    // Set src pixel values
    Color pelColor = new Color(100, 100, 100, 128);
    for (int i = 0; i < 10; i++) {
        src.setRGB(0, i, pelColor.getRGB());
    }

    ColorModel cm = new ComponentColorModel
        (ColorSpace.getInstance(ColorSpace.CS_GRAY),
         new int [] {8,8}, true,
         src.getColorModel().isAlphaPremultiplied(),
         Transparency.TRANSLUCENT,
         DataBuffer.TYPE_BYTE);

    SampleModel sm = new PixelInterleavedSampleModel
        (DataBuffer.TYPE_BYTE, 100, 100, 2, 200,
         new int [] { 0, 1 });

    WritableRaster wr = Raster.createWritableRaster(sm, new Point(0,0));

    BufferedImage dst =
        new BufferedImage(cm, wr, cm.isAlphaPremultiplied(), null);
    dst = dst.getSubimage(0, 0, 1, 10);

    ColorConvertOp op = new ColorConvertOp(null);

    op.filter(src, dst);

    for (int i = 0; i < 10; i++) {
        if (((dst.getRGB(0, i) >> 24) & 0xff) != 128) {
            throw new RuntimeException(
                "Incorrect destination alpha value.");
        }
    }

}
 

public boolean canEncodeImage(ImageTypeSpecifier type) {
    SampleModel sm = type.getSampleModel();
    if (!(sm instanceof MultiPixelPackedSampleModel))
        return false;
    if (sm.getSampleSize(0) != 1)
        return false;

    return true;
}
 

/**
 *  Constructs a ShortInterleavedRaster with the given SampleModel.
 *  The Raster's upper left corner is origin and it is the same
 *  size as the SampleModel.  A DataBuffer large enough to describe the
 *  Raster is automatically created.  SampleModel must be of type
 *  PixelInterleavedSampleModel or SinglePixelPackedSampleModel.
 *  @param sampleModel     The SampleModel that specifies the layout.
 *  @param origin          The Point that specified the origin.
 */
public ShortInterleavedRaster(SampleModel sampleModel, Point origin) {
    this(sampleModel,
         (DataBufferUShort) sampleModel.createDataBuffer(),
         new Rectangle(origin.x,
                       origin.y,
                       sampleModel.getWidth(),
                       sampleModel.getHeight()),
         origin,
         null);
}
 

/**
 * Creates a Raster with the same layout but using a different
 * width and height, and with new zeroed data arrays.
 */
public WritableRaster createCompatibleWritableRaster(int w, int h) {
    if (w <= 0 || h <=0) {
        throw new RasterFormatException("negative "+
                                      ((w <= 0) ? "width" : "height"));
    }

    SampleModel sm = sampleModel.createCompatibleSampleModel(w,h);

    return new ByteBandedRaster(sm, new Point(0,0));
}
 

private static BufferedImage copyImage(
    final int targetWidth,
    final int targetHeight,
    final Color backgroundColor,
    final double[][] noDataValues,
    final RenderedImage originalImage) {
  Hashtable<String, Object> properties = null;

  if (originalImage.getPropertyNames() != null) {
    properties = new Hashtable<>();
    for (final String name : originalImage.getPropertyNames()) {
      properties.put(name, originalImage.getProperty(name));
    }
  }

  final SampleModel sm =
      originalImage.getSampleModel().createCompatibleSampleModel(targetWidth, targetHeight);
  final WritableRaster raster = Raster.createWritableRaster(sm, null);

  final ColorModel colorModel = originalImage.getColorModel();
  final boolean alphaPremultiplied = colorModel.isAlphaPremultiplied();

  RasterUtils.fillWithNoDataValues(raster, noDataValues);
  final BufferedImage image =
      new BufferedImage(colorModel, raster, alphaPremultiplied, properties);
  if (noDataValues == null) {
    final Graphics2D g2D = (Graphics2D) image.getGraphics();
    final Color save = g2D.getColor();
    g2D.setColor(backgroundColor);
    g2D.fillRect(0, 0, image.getWidth(), image.getHeight());
    g2D.setColor(save);
  }
  return image;
}
 

/**
 * Creates a subraster given a region of the raster.  The x and y
 * coordinates specify the horizontal and vertical offsets
 * from the upper-left corner of this raster to the upper-left corner
 * of the subraster.  A subset of the bands of the parent Raster may
 * be specified.  If this is null, then all the bands are present in the
 * subRaster. A translation to the subRaster may also be specified.
 * Note that the subraster will reference the same
 * DataBuffer as the parent raster, but using different offsets.
 * @param x               X offset.
 * @param y               Y offset.
 * @param width           Width (in pixels) of the subraster.
 * @param height          Height (in pixels) of the subraster.
 * @param x0              Translated X origin of the subraster.
 * @param y0              Translated Y origin of the subraster.
 * @param bandList        Array of band indices.
 * @exception RasterFormatException
 *            if the specified bounding box is outside of the parent raster.
 */
public WritableRaster createWritableChild (int x, int y,
                                           int width, int height,
                                           int x0, int y0,
                                           int bandList[]) {
    if (x < this.minX) {
        throw new RasterFormatException("x lies outside raster");
    }
    if (y < this.minY) {
        throw new RasterFormatException("y lies outside raster");
    }
    if ((x+width < x) || (x+width > this.minX + this.width)) {
        throw new RasterFormatException("(x + width) is outside raster");
    }
    if ((y+height < y) || (y+height > this.minY + this.height)) {
        throw new RasterFormatException("(y + height) is outside raster");
    }

    SampleModel sm;

    if (bandList != null)
        sm = sampleModel.createSubsetSampleModel(bandList);
    else
        sm = sampleModel;

    int deltaX = x0 - x;
    int deltaY = y0 - y;

    return new IntegerComponentRaster(sm,
                                      dataBuffer,
                                      new Rectangle(x0,y0,width,height),
                                      new Point(sampleModelTranslateX+deltaX,
                                                sampleModelTranslateY+deltaY),
                                      this);
}
 

/**
 * Constructs a ShortComponentRaster with the given SampleModel
 * and DataBuffer.  The Raster's upper left corner is origin and
 * it is the same sizes the SampleModel.  The DataBuffer is not
 * initialized and must be a DataBufferUShort compatible with SampleModel.
 * SampleModel must be of type ComponentSampleModel or
 * SinglePixelPackedSampleModel.
 * @param sampleModel     The SampleModel that specifies the layout.
 * @param dataBuffer      The DataBufferUShort that contains the image data.
 * @param origin          The Point that specifies the origin.
 */
public ShortComponentRaster(SampleModel sampleModel,
                            DataBufferUShort dataBuffer,
                            Point origin)
{
    this(sampleModel,
         dataBuffer,
         new Rectangle(origin.x,
                       origin.y,
                       sampleModel.getWidth(),
                       sampleModel.getHeight()),
         origin,
         null);
}
 

/**
 * Copies an arbitrary rectangular region of the RenderedImage into a
 * caller-supplied WritableRaster. The region to be computed is determined by
 * clipping the bounds of the supplied WritableRaster against the bounds of
 * the image. The supplied WritableRaster must have a SampleModel that is
 * compatible with that of the image.
 * 
 * <p>
 * If the raster argument is null, the entire image will be copied into a
 * newly-created WritableRaster with a SampleModel that is compatible with
 * that of the image.
 * 
 * @param dest
 *          a WritableRaster to hold the returned portion of the image.
 * @return a reference to the supplied WritableRaster, or to a new
 *         WritableRaster if the supplied one was null.
 */
@Override
public WritableRaster copyData(WritableRaster dest) {
  Rectangle bounds;
  Raster tile;

  if (dest == null) {
    bounds = getBounds();
    Point p = new Point(minX, minY);
    /* A SampleModel to hold the entire image. */
    SampleModel sm = sampleModel.createCompatibleSampleModel(width, height);
    dest = Raster.createWritableRaster(sm, p);
  } else {
    bounds = dest.getBounds();
  }

  int startX = XToTileX(bounds.x);
  int startY = YToTileY(bounds.y);
  int endX = XToTileX(bounds.x + bounds.width - 1);
  int endY = YToTileY(bounds.y + bounds.height - 1);

  for (int j = startY; j <= endY; j++) {
    for (int i = startX; i <= endX; i++) {
      tile = getTile(i, j);
      Rectangle intersectRect = bounds.intersection(tile.getBounds());
      Raster liveRaster = tile.createChild(intersectRect.x, intersectRect.y, intersectRect.width,
          intersectRect.height, intersectRect.x, intersectRect.y, null);

      /*
       * WritableRaster.setDataElements takes into account of inRaster's minX
       * and minY and add these to x and y. Since liveRaster has the origin at
       * the correct location, the following call should not again give these
       * coordinates in places of x and y.
       */
      dest.setDataElements(0, 0, liveRaster);
    }
  }
  return dest;
}
 

/**
 * Creates a Writable subRaster given a region of the Raster. The x and y
 * coordinates specify the horizontal and vertical offsets
 * from the upper-left corner of this Raster to the upper-left corner
 * of the subRaster.  The bandList is ignored.
 * A translation to the subRaster may also be specified.
 * Note that the subRaster will reference the same
 * DataBuffer as the parent Raster, but using different offsets.
 * @param x               X offset.
 * @param y               Y offset.
 * @param width           Width (in pixels) of the subraster.
 * @param height          Height (in pixels) of the subraster.
 * @param x0              Translated X origin of the subraster.
 * @param y0              Translated Y origin of the subraster.
 * @param bandList        Array of band indices.
 * @exception RasterFormatException
 *            if the specified bounding box is outside of the parent Raster.
 */
public WritableRaster createWritableChild(int x, int y,
                                          int width, int height,
                                          int x0, int y0,
                                          int[] bandList) {
    if (x < this.minX) {
        throw new RasterFormatException("x lies outside the raster");
    }
    if (y < this.minY) {
        throw new RasterFormatException("y lies outside the raster");
    }
    if ((x+width < x) || (x+width > this.minX + this.width)) {
        throw new RasterFormatException("(x + width) is outside of Raster");
    }
    if ((y+height < y) || (y+height > this.minY + this.height)) {
        throw new RasterFormatException("(y + height) is outside of Raster");
    }

    SampleModel sm;

    if (bandList != null) {
        sm = sampleModel.createSubsetSampleModel(bandList);
    }
    else {
        sm = sampleModel;
    }

    int deltaX = x0 - x;
    int deltaY = y0 - y;

    return new BytePackedRaster(sm,
                                dataBuffer,
                                new Rectangle(x0, y0, width, height),
                                new Point(sampleModelTranslateX+deltaX,
                                          sampleModelTranslateY+deltaY),
                                this);
}
 

/**
 *  Constructs a ShortComponentRaster with the given SampleModel.
 *  The Raster's upper left corner is origin and it is the same
 *  size as the SampleModel.  A DataBuffer large enough to describe the
 *  Raster is automatically created.  SampleModel must be of type
 *  ComponentSampleModel or SinglePixelPackedSampleModel.
 *  @param sampleModel     The SampleModel that specifies the layout.
 *  @param origin          The Point that specified the origin.
 */
public ShortComponentRaster(SampleModel sampleModel, Point origin) {
    this(sampleModel,
         (DataBufferUShort) sampleModel.createDataBuffer(),
         new Rectangle(origin.x,
                       origin.y,
                       sampleModel.getWidth(),
                       sampleModel.getHeight()),
         origin,
         null);
}
 

/**
 * Creates a Writable subRaster given a region of the Raster. The x and y
 * coordinates specify the horizontal and vertical offsets
 * from the upper-left corner of this Raster to the upper-left corner
 * of the subRaster.  A subset of the bands of the parent Raster may
 * be specified.  If this is null, then all the bands are present in the
 * subRaster. A translation to the subRaster may also be specified.
 * Note that the subRaster will reference the same
 * DataBuffers as the parent Raster, but using different offsets.
 * @param x               X offset.
 * @param y               Y offset.
 * @param width           Width (in pixels) of the subraster.
 * @param height          Height (in pixels) of the subraster.
 * @param x0              Translated X origin of the subraster.
 * @param y0              Translated Y origin of the subraster.
 * @param bandList        Array of band indices.
 * @exception RasterFormatException
 *            if the specified bounding box is outside of the parent Raster.
 */
public WritableRaster createWritableChild(int x, int y,
                                          int width, int height,
                                          int x0, int y0,
                                          int[] bandList) {
    if (x < this.minX) {
        throw new RasterFormatException("x lies outside the raster");
    }
    if (y < this.minY) {
        throw new RasterFormatException("y lies outside the raster");
    }
    if ((x+width < x) || (x+width > this.minX + this.width)) {
        throw new RasterFormatException("(x + width) is outside of Raster");
    }
    if ((y+height < y) || (y+height > this.minY + this.height)) {
        throw new RasterFormatException("(y + height) is outside of Raster");
    }

    SampleModel sm;

    if (bandList != null)
        sm = sampleModel.createSubsetSampleModel(bandList);
    else
        sm = sampleModel;

    int deltaX = x0 - x;
    int deltaY = y0 - y;

    return new ShortInterleavedRaster(sm,
                                   dataBuffer,
                                   new Rectangle(x0, y0, width, height),
                                   new Point(sampleModelTranslateX+deltaX,
                                             sampleModelTranslateY+deltaY),
                                   this);
}
 

/**
 * Creates a subraster given a region of the raster.  The x and y
 * coordinates specify the horizontal and vertical offsets
 * from the upper-left corner of this raster to the upper-left corner
 * of the subraster.  A subset of the bands of the parent Raster may
 * be specified.  If this is null, then all the bands are present in the
 * subRaster. A translation to the subRaster may also be specified.
 * Note that the subraster will reference the same
 * DataBuffer as the parent raster, but using different offsets.
 * @param x               X offset.
 * @param y               Y offset.
 * @param width           Width (in pixels) of the subraster.
 * @param height          Height (in pixels) of the subraster.
 * @param x0              Translated X origin of the subraster.
 * @param y0              Translated Y origin of the subraster.
 * @param bandList        Array of band indices.
 * @exception RasterFormatException
 *            if the specified bounding box is outside of the parent raster.
 */
public WritableRaster createWritableChild (int x, int y,
                                           int width, int height,
                                           int x0, int y0,
                                           int bandList[]) {
    if (x < this.minX) {
        throw new RasterFormatException("x lies outside raster");
    }
    if (y < this.minY) {
        throw new RasterFormatException("y lies outside raster");
    }
    if ((x+width < x) || (x+width > this.minX + this.width)) {
        throw new RasterFormatException("(x + width) is outside raster");
    }
    if ((y+height < y) || (y+height > this.minY + this.height)) {
        throw new RasterFormatException("(y + height) is outside raster");
    }

    SampleModel sm;

    if (bandList != null)
        sm = sampleModel.createSubsetSampleModel(bandList);
    else
        sm = sampleModel;

    int deltaX = x0 - x;
    int deltaY = y0 - y;

    return new IntegerComponentRaster(sm,
                                      dataBuffer,
                                      new Rectangle(x0,y0,width,height),
                                      new Point(sampleModelTranslateX+deltaX,
                                                sampleModelTranslateY+deltaY),
                                      this);
}
 

/**
 * Constructs a ShortBandedRaster with the given SampleModel,
 * DataBuffer, and parent.  DataBuffer must be a DataBufferUShort and
 * SampleModel must be of type BandedSampleModel.
 * When translated into the base Raster's
 * coordinate system, aRegion must be contained by the base Raster.
 * Origin is the coordinate in the new Raster's coordinate system of
 * the origin of the base Raster.  (The base Raster is the Raster's
 * ancestor which has no parent.)
 *
 * Note that this constructor should generally be called by other
 * constructors or create methods, it should not be used directly.
 * @param sampleModel     The SampleModel that specifies the layout.
 * @param dataBuffer      The DataBufferUShort that contains the image data.
 * @param aRegion         The Rectangle that specifies the image area.
 * @param origin          The Point that specifies the origin.
 * @param parent          The parent (if any) of this raster.
 */
public ShortBandedRaster(SampleModel sampleModel,
                            DataBuffer dataBuffer,
                            Rectangle aRegion,
                            Point origin,
                            ShortBandedRaster parent) {

    super(sampleModel, dataBuffer, aRegion, origin, parent);
    this.maxX = minX + width;
    this.maxY = minY + height;
    if (!(dataBuffer instanceof DataBufferUShort)) {
       throw new RasterFormatException("ShortBandedRaster must have " +
            "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;
        for (int i = 0; i < bankIndices.length; i++) {
           data[i] = stealData(dbus, bankIndices[i]);
           dataOffsets[i] = dOffsets[bankIndices[i]] +
               xOffset + yOffset*scanlineStride + bandOffsets[i];
        }
    } else {
        throw new RasterFormatException("ShortBandedRasters must have "+
            "BandedSampleModels");
    }
    verify();
}
 

public static void main(String[] args) throws IIOInvalidTreeException {

        // getting the writer for the png format
        Iterator iter = ImageIO.getImageWritersByFormatName("png");
        ImageWriter writer = (ImageWriter) iter.next();

        // creating a color model
        ColorModel colorModel = ColorModel.getRGBdefault();

        // creating a sample model
        SampleModel sampleModel = colorModel.createCompatibleSampleModel(640, 480);

        // creating a default metadata object
        IIOMetadata metaData = writer.getDefaultImageMetadata(new ImageTypeSpecifier(colorModel, sampleModel), null);
        String formatName = metaData.getNativeMetadataFormatName();

        // first call
        Node metaDataNode = metaData.getAsTree(formatName);
        try {
            metaData.setFromTree(formatName, metaDataNode);
        } catch (Exception ex) {
            ex.printStackTrace();
        }

        // second call (bitdepht is already set to an invalid value)
        metaDataNode = metaData.getAsTree(formatName);

        metaData.setFromTree(formatName, metaDataNode);

    }
 

/**
 * Creates a Writable subRaster given a region of the Raster. The x and y
 * coordinates specify the horizontal and vertical offsets
 * from the upper-left corner of this Raster to the upper-left corner
 * of the subRaster.  A subset of the bands of the parent Raster may
 * be specified.  If this is null, then all the bands are present in the
 * subRaster. A translation to the subRaster may also be specified.
 * Note that the subRaster will reference the same
 * DataBuffers as the parent Raster, but using different offsets.
 * @param x               X offset.
 * @param y               Y offset.
 * @param width           Width (in pixels) of the subraster.
 * @param height          Height (in pixels) of the subraster.
 * @param x0              Translated X origin of the subraster.
 * @param y0              Translated Y origin of the subraster.
 * @param bandList        Array of band indices.
 * @exception RasterFormatException
 *            if the specified bounding box is outside of the parent Raster.
 */
public WritableRaster createWritableChild(int x, int y,
                                          int width, int height,
                                          int x0, int y0,
                                          int[] bandList) {
    if (x < this.minX) {
        throw new RasterFormatException("x lies outside the raster");
    }
    if (y < this.minY) {
        throw new RasterFormatException("y lies outside the raster");
    }
    if ((x+width < x) || (x+width > this.minX + this.width)) {
        throw new RasterFormatException("(x + width) is outside of Raster");
    }
    if ((y+height < y) || (y+height > this.minY + this.height)) {
        throw new RasterFormatException("(y + height) is outside of Raster");
    }

    SampleModel sm;

    if (bandList != null)
        sm = sampleModel.createSubsetSampleModel(bandList);
    else
        sm = sampleModel;

    int deltaX = x0 - x;
    int deltaY = y0 - y;

    return new ShortInterleavedRaster(sm,
                                   dataBuffer,
                                   new Rectangle(x0, y0, width, height),
                                   new Point(sampleModelTranslateX+deltaX,
                                             sampleModelTranslateY+deltaY),
                                   this);
}
 

/**
 *  Constructs a ByteBandedRaster with the given sampleModel. The
 *  Raster's upper left corner is origin and it is the same
 *  size as the SampleModel.  A dataBuffer large
 *  enough to describe the Raster is automatically created. SampleModel
 *  must be of type BandedSampleModel.
 *  @param sampleModel     The SampleModel that specifies the layout.
 *  @param origin          The Point that specifies the origin.
 */
public ByteBandedRaster(SampleModel sampleModel,
                           Point origin) {
    this(sampleModel,
         sampleModel.createDataBuffer(),
         new Rectangle(origin.x,
                       origin.y,
                       sampleModel.getWidth(),
                       sampleModel.getHeight()),
         origin,
         null);
}
 

@Override
public WritableRaster createCompatibleWritableRaster(final int w,
	final int h)
{
	final int[] bandOffsets = new int[nChannels];
	for (int i = 0; i < nChannels; i++)
		bandOffsets[i] = i;

	final SampleModel m = new ComponentSampleModel(DataBuffer.TYPE_INT, w, h,
		nChannels, w * nChannels, bandOffsets);
	final DataBuffer db = new DataBufferInt(w * h, nChannels);
	return Raster.createWritableRaster(m, db, null);
}