java/11 : java.desktop/sun/awt/image/ByteInterleavedRaster.java

ByteInterleavedRaster
https://openjdk.java.net/
GPLv2 + Classpath Exception
/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
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 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package sun.awt.image;
import java.awt.image.Raster;
import java.awt.image.WritableRaster;
import java.awt.image.RasterFormatException;
import java.awt.image.SampleModel;
import java.awt.image.ComponentSampleModel;
import java.awt.image.PixelInterleavedSampleModel;
import java.awt.image.SinglePixelPackedSampleModel;
import java.awt.image.DataBufferByte;
import java.awt.Rectangle;
import java.awt.Point;

This class defines a Raster with pixels consisting of one or more
8-bit data elements stored in close proximity to each other in a
single byte array.

The bit precision per data element is that of the data type (that
is, the bit precision for this Raster is 8).  There is only one
pixel stride and one scanline stride for all bands.  This type of
Raster can be used with a ComponentColorModel if there are multiple
bands, or an IndexColorModel if there is only one band.
/**
 * This class defines a Raster with pixels consisting of one or more
 * 8-bit data elements stored in close proximity to each other in a
 * single byte array.
 * <p>
 * The bit precision per data element is that of the data type (that
 * is, the bit precision for this Raster is 8).  There is only one
 * pixel stride and one scanline stride for all bands.  This type of
 * Raster can be used with a ComponentColorModel if there are multiple
 * bands, or an IndexColorModel if there is only one band.
 *
 */
public class ByteInterleavedRaster extends ByteComponentRaster {

    True if the data offsets range from 0 to (pixelStride - 1) in order. /** True if the data offsets range from 0 to (pixelStride - 1) in order. */
    boolean inOrder;

    The DataBuffer offset, minus sampleModelTranslateX*pixelStride,
minus sampleModelTranslateY*scanlineStride, used to calculate
pixel offsets.
/**
     * The DataBuffer offset, minus sampleModelTranslateX*pixelStride,
     * minus sampleModelTranslateY*scanlineStride, used to calculate
     * pixel offsets.
     */
    int dbOffset;
    int dbOffsetPacked;

    True if a SinglePixelPackedSampleModel is being used. /** True if a SinglePixelPackedSampleModel is being used. */
    boolean packed = false;

    If packed == true, the SampleModel's bit masks. /** If packed == true, the SampleModel's bit masks. */
    int[] bitMasks;

    If packed == true, the SampleModel's bit offsets. /** If packed == true, the SampleModel's bit offsets. */
    int[] bitOffsets;

    A cached copy of minX + width for use in bounds checks. /** A cached copy of minX + width for use in bounds checks. */
    private int maxX;

    A cached copy of minY + height for use in bounds checks. /** A cached copy of minY + height for use in bounds checks. */
    private int maxY;

    Constructs a ByteInterleavedRaster 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
SinglePixelPackedSampleModel or InterleavedSampleModel.
Params: sampleModel –     The SampleModel that specifies the layout.
origin –          The Point that specified the origin./**
     * Constructs a ByteInterleavedRaster 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
     * SinglePixelPackedSampleModel or InterleavedSampleModel.
     * @param sampleModel     The SampleModel that specifies the layout.
     * @param origin          The Point that specified the origin.
     */
    public ByteInterleavedRaster(SampleModel sampleModel, Point origin) {
        this(sampleModel,
             (DataBufferByte) sampleModel.createDataBuffer(),
             new Rectangle(origin.x,
                           origin.y,
                           sampleModel.getWidth(),
                           sampleModel.getHeight()),
             origin,
             null);
    }

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

    Analyzes a ComponentSampleModel to determine if it can function
as a PixelInterleavedSampleModel.  In order to do so, it must use
only bank 0 of its DataBuffer, and the data offsets must span a range
of less than pixelStride.
 These properties are trivially true for a 1-banded SampleModel.
/*** Analyzes a ComponentSampleModel to determine if it can function
     * as a PixelInterleavedSampleModel.  In order to do so, it must use
     * only bank 0 of its DataBuffer, and the data offsets must span a range
     * of less than pixelStride.
     *
     * <p> These properties are trivially true for a 1-banded SampleModel.
     */
    private boolean isInterleaved(ComponentSampleModel sm) {
        // Analyze ComponentSampleModel to determine if it has the
        // properties of a PixelInterleavedSampleModel

        int numBands = sampleModel.getNumBands();
        if (numBands == 1) {
            return true;
        }

        // Determine banks used
        int[] bankIndices = sm.getBankIndices();
        for (int i = 0; i < numBands; i++) {
            if (bankIndices[i] != 0) {
                return false;
            }
        }

        // Determine range of band offsets
        int[] bandOffsets = sm.getBandOffsets();
        int minOffset = bandOffsets[0];
        int maxOffset = minOffset;
        for (int i = 1; i < numBands; i++) {
            int offset = bandOffsets[i];
            if (offset < minOffset) {
                minOffset = offset;
            }
            if (offset > maxOffset) {
                maxOffset = offset;
            }
        }
        if (maxOffset - minOffset >= sm.getPixelStride()) {
            return false;
        }

        return true;
    }

    Constructs a ByteInterleavedRaster with the given SampleModel,
DataBuffer, and parent.  DataBuffer must be a DataBufferByte and
SampleModel must be of type SinglePixelPackedSampleModel
or InterleavedSampleModel.
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.
Params: sampleModel –     The SampleModel that specifies the layout.
dataBuffer –      The DataBufferByte that contains the image data.
aRegion –         The Rectangle that specifies the image area.
origin –          The Point that specifies the origin.
parent –          The parent (if any) of this raster./**
     * Constructs a ByteInterleavedRaster with the given SampleModel,
     * DataBuffer, and parent.  DataBuffer must be a DataBufferByte and
     * SampleModel must be of type SinglePixelPackedSampleModel
     * or InterleavedSampleModel.
     * 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 DataBufferByte 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 ByteInterleavedRaster(SampleModel sampleModel,
                                 DataBufferByte dataBuffer,
                                 Rectangle aRegion,
                                 Point origin,
                                 ByteInterleavedRaster parent)
    {
        super(sampleModel, dataBuffer, aRegion, origin, parent);
        this.maxX = minX + width;
        this.maxY = minY + height;

        this.data = stealData(dataBuffer, 0);

        int xOffset = aRegion.x - origin.x;
        int yOffset = aRegion.y - origin.y;
        if (sampleModel instanceof PixelInterleavedSampleModel ||
            (sampleModel instanceof ComponentSampleModel &&
             isInterleaved((ComponentSampleModel)sampleModel))) {
            ComponentSampleModel csm = (ComponentSampleModel)sampleModel;
            this.scanlineStride = csm.getScanlineStride();
            this.pixelStride = csm.getPixelStride();
            this.dataOffsets = csm.getBandOffsets();
            for (int i = 0; i < getNumDataElements(); i++) {
                dataOffsets[i] += xOffset*pixelStride+yOffset*scanlineStride;
            }
        } else if (sampleModel instanceof SinglePixelPackedSampleModel) {
            SinglePixelPackedSampleModel sppsm =
                    (SinglePixelPackedSampleModel)sampleModel;
            this.packed = true;
            this.bitMasks = sppsm.getBitMasks();
            this.bitOffsets = sppsm.getBitOffsets();
            this.scanlineStride = sppsm.getScanlineStride();
            this.pixelStride = 1;
            this.dataOffsets = new int[1];
            this.dataOffsets[0] = dataBuffer.getOffset();
            dataOffsets[0] += xOffset*pixelStride+yOffset*scanlineStride;
        } else {
            throw new RasterFormatException("ByteInterleavedRasters must " +
              "have PixelInterleavedSampleModel, SinglePixelPackedSampleModel"+
              " or interleaved ComponentSampleModel.  Sample model is " +
              sampleModel);
        }
        this.bandOffset = this.dataOffsets[0];

        this.dbOffsetPacked = dataBuffer.getOffset() -
            sampleModelTranslateY*scanlineStride -
            sampleModelTranslateX*pixelStride;
        this.dbOffset = dbOffsetPacked -
            (xOffset*pixelStride+yOffset*scanlineStride);

        // Set inOrder to true if the data elements are in order and
        // have no gaps between them
        this.inOrder = false;
        if (numDataElements == pixelStride) {
            inOrder = true;
            for (int i = 1; i < numDataElements; i++) {
                if (dataOffsets[i] - dataOffsets[0] != i) {
                    inOrder = false;
                    break;
                }
            }
        }

        verify();
    }

    Returns a copy of the data offsets array. For each band the data offset
is the index into the band's data array, of the first sample of the
band.
/**
     * Returns a copy of the data offsets array. For each band the data offset
     * is the index into the band's data array, of the first sample of the
     * band.
     */
    public int[] getDataOffsets() {
        return dataOffsets.clone();
    }

    Returns the data offset for the specified band.  The data offset
is the index into the data array
in which the first sample of the first scanline is stored.
Params: band –  The band whose offset is returned./**
     * Returns the data offset for the specified band.  The data offset
     * is the index into the data array
     * in which the first sample of the first scanline is stored.
     * @param band  The band whose offset is returned.
     */
    public int getDataOffset(int band) {
        return dataOffsets[band];
    }

    Returns the scanline stride -- the number of data array elements between
a given sample and the sample in the same column of the next row in the
same band.
/**
     * Returns the scanline stride -- the number of data array elements between
     * a given sample and the sample in the same column of the next row in the
     * same band.
     */
    public int getScanlineStride() {
        return scanlineStride;
    }

    Returns pixel stride -- the number of data array elements between two
samples for the same band on the same scanline.
/**
     * Returns pixel stride -- the number of data array elements between two
     * samples for the same band on the same scanline.
     */
    public int getPixelStride() {
        return pixelStride;
    }

    Returns a reference to the data array.
/**
     * Returns a reference to the data array.
     */
    public byte[] getDataStorage() {
        return data;
    }

    Returns the data elements for all bands at the specified
location.
An ArrayIndexOutOfBounds exception will be thrown at runtime
if the pixel coordinate is out of bounds.
A ClassCastException will be thrown if the input object is non null
and references anything other than an array of transferType.
Params: x –        The X coordinate of the pixel location.
y –        The Y coordinate of the pixel location.
obj –      An object reference to an array of type defined by
                getTransferType() and length getNumDataElements().
                If null an array of appropriate type and size will be
                allocated.
Returns:         An object reference to an array of type defined by
                getTransferType() with the request pixel data./**
     * Returns the data elements for all bands at the specified
     * location.
     * An ArrayIndexOutOfBounds exception will be thrown at runtime
     * if the pixel coordinate is out of bounds.
     * A ClassCastException will be thrown if the input object is non null
     * and references anything other than an array of transferType.
     * @param x        The X coordinate of the pixel location.
     * @param y        The Y coordinate of the pixel location.
     * @param obj      An object reference to an array of type defined by
     *                 getTransferType() and length getNumDataElements().
     *                 If null an array of appropriate type and size will be
     *                 allocated.
     * @return         An object reference to an array of type defined by
     *                 getTransferType() with the request pixel data.
     */
    public Object getDataElements(int x, int y, Object obj) {
        if ((x < this.minX) || (y < this.minY) ||
            (x >= this.maxX) || (y >= this.maxY)) {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }
        byte outData[];
        if (obj == null) {
            outData = new byte[numDataElements];
        } else {
            outData = (byte[])obj;
        }
        int off = (y-minY)*scanlineStride +
                  (x-minX)*pixelStride;

        for (int band = 0; band < numDataElements; band++) {
            outData[band] = data[dataOffsets[band] + off];
        }

        return outData;
    }

    Returns an array of data elements from the specified rectangular
region.
An ArrayIndexOutOfBounds exception will be thrown at runtime
if the pixel coordinates are out of bounds.
A ClassCastException will be thrown if the input object is non null
and references anything other than an array of transferType.
      byte[] bandData = (byte[])raster.getDataElements(x, y, w, h, null);
      int numDataElements = raster.getNumDataElements();
      byte[] pixel = new byte[numDataElements];
      // To find a data element at location (x2, y2)
      System.arraycopy(bandData, ((y2-y)*w + (x2-x))*numDataElements,
                       pixel, 0, numDataElements);

Params: x –        The X coordinate of the upper left pixel location.
y –        The Y coordinate of the upper left pixel location.
w –        Width of the pixel rectangle.
h –        Height of the pixel rectangle.
obj –      An object reference to an array of type defined by
                getTransferType() and length w*h*getNumDataElements().
                If null an array of appropriate type and size will be
                allocated.
Returns:         An object reference to an array of type defined by
                getTransferType() with the request pixel data./**
     * Returns an array of data elements from the specified rectangular
     * region.
     * An ArrayIndexOutOfBounds exception will be thrown at runtime
     * if the pixel coordinates are out of bounds.
     * A ClassCastException will be thrown if the input object is non null
     * and references anything other than an array of transferType.
     * <pre>
     *       byte[] bandData = (byte[])raster.getDataElements(x, y, w, h, null);
     *       int numDataElements = raster.getNumDataElements();
     *       byte[] pixel = new byte[numDataElements];
     *       // To find a data element at location (x2, y2)
     *       System.arraycopy(bandData, ((y2-y)*w + (x2-x))*numDataElements,
     *                        pixel, 0, numDataElements);
     * </pre>
     * @param x        The X coordinate of the upper left pixel location.
     * @param y        The Y coordinate of the upper left pixel location.
     * @param w        Width of the pixel rectangle.
     * @param h        Height of the pixel rectangle.
     * @param obj      An object reference to an array of type defined by
     *                 getTransferType() and length w*h*getNumDataElements().
     *                 If null an array of appropriate type and size will be
     *                 allocated.
     * @return         An object reference to an array of type defined by
     *                 getTransferType() with the request pixel data.
     */
    public Object getDataElements(int x, int y, int w, int h, Object obj) {
        return getByteData(x, y, w, h, (byte[])obj);
    }

    Returns a byte array of data elements from the specified rectangular
region for the specified band.
An ArrayIndexOutOfBounds exception will be thrown at runtime
if the pixel coordinates are out of bounds.
      byte[] bandData = raster.getByteData(x, y, w, h, null);
      // To find the data element at location (x2, y2)
      byte bandElement = bandData[((y2-y)*w + (x2-x))];

Params: x –        The X coordinate of the upper left pixel location.
y –        The Y coordinate of the upper left pixel location.
w –        Width of the pixel rectangle.
h –        Height of the pixel rectangle.
band –     The band to return.
outData –  If non-null, data elements for all bands
                at the specified location are returned in this array.
Returns:         Data array with data elements for all bands./**
     * Returns a byte array of data elements from the specified rectangular
     * region for the specified band.
     * An ArrayIndexOutOfBounds exception will be thrown at runtime
     * if the pixel coordinates are out of bounds.
     * <pre>
     *       byte[] bandData = raster.getByteData(x, y, w, h, null);
     *       // To find the data element at location (x2, y2)
     *       byte bandElement = bandData[((y2-y)*w + (x2-x))];
     * </pre>
     * @param x        The X coordinate of the upper left pixel location.
     * @param y        The Y coordinate of the upper left pixel location.
     * @param w        Width of the pixel rectangle.
     * @param h        Height of the pixel rectangle.
     * @param band     The band to return.
     * @param outData  If non-null, data elements for all bands
     *                 at the specified location are returned in this array.
     * @return         Data array with data elements for all bands.
     */
    public byte[] getByteData(int x, int y, int w, int h,
                              int band, byte[] outData) {
        // Bounds check for 'band' will be performed automatically
        if ((x < this.minX) || (y < this.minY) ||
            (x + w > this.maxX) || (y + h > this.maxY)) {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }
        if (outData == null) {
            outData = new byte[w*h];
        }
        int yoff = (y-minY)*scanlineStride +
                   (x-minX)*pixelStride + dataOffsets[band];
        int xoff;
        int off = 0;
        int xstart;
        int ystart;

        if (pixelStride == 1) {
            if (scanlineStride == w) {
                System.arraycopy(data, yoff, outData, 0, w*h);
            } else {
                for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
                    System.arraycopy(data, yoff, outData, off, w);
                    off += w;
                }
            }
        } else {
            for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
                xoff = yoff;
                for (xstart=0; xstart < w; xstart++, xoff += pixelStride) {
                    outData[off++] = data[xoff];
                }
            }
        }

        return outData;
    }

    Returns a byte array of data elements from the specified rectangular
region.
An ArrayIndexOutOfBounds exception will be thrown at runtime
if the pixel coordinates are out of bounds.
      byte[] bandData = raster.getByteData(x, y, w, h, null);
      int numDataElements = raster.getnumDataElements();
      byte[] pixel = new byte[numDataElements];
      // To find a data element at location (x2, y2)
      System.arraycopy(bandData, ((y2-y)*w + (x2-x))*numDataElements,
                       pixel, 0, numDataElements);

Params: x –        The X coordinate of the upper left pixel location.
y –        The Y coordinate of the upper left pixel location.
w –        Width of the pixel rectangle.
h –        Height of the pixel rectangle.
outData –  If non-null, data elements for all bands
                at the specified location are returned in this array.
Returns:         Data array with data elements for all bands./**
     * Returns a byte array of data elements from the specified rectangular
     * region.
     * An ArrayIndexOutOfBounds exception will be thrown at runtime
     * if the pixel coordinates are out of bounds.
     * <pre>
     *       byte[] bandData = raster.getByteData(x, y, w, h, null);
     *       int numDataElements = raster.getnumDataElements();
     *       byte[] pixel = new byte[numDataElements];
     *       // To find a data element at location (x2, y2)
     *       System.arraycopy(bandData, ((y2-y)*w + (x2-x))*numDataElements,
     *                        pixel, 0, numDataElements);
     * </pre>
     * @param x        The X coordinate of the upper left pixel location.
     * @param y        The Y coordinate of the upper left pixel location.
     * @param w        Width of the pixel rectangle.
     * @param h        Height of the pixel rectangle.
     * @param outData  If non-null, data elements for all bands
     *                 at the specified location are returned in this array.
     * @return         Data array with data elements for all bands.
     */
    public byte[] getByteData(int x, int y, int w, int h, byte[] outData) {
        if ((x < this.minX) || (y < this.minY) ||
            (x + w > this.maxX) || (y + h > this.maxY)) {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }
        if (outData == null) {
            outData = new byte[numDataElements*w*h];
        }
        int yoff = (y-minY)*scanlineStride +
                   (x-minX)*pixelStride;
        int xoff;
        int off = 0;
        int xstart;
        int ystart;

        if (inOrder) {
            yoff += dataOffsets[0];
            int rowBytes = w*pixelStride;
            if (scanlineStride == rowBytes) {
                System.arraycopy(data, yoff, outData, off, rowBytes*h);
            } else {
                for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
                    System.arraycopy(data, yoff, outData, off, rowBytes);
                    off += rowBytes;
                }
            }
        } else if (numDataElements == 1) {
            yoff += dataOffsets[0];
            for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
                xoff = yoff;
                for (xstart=0; xstart < w; xstart++, xoff += pixelStride) {
                    outData[off++] = data[xoff];
                }
            }
        } else if (numDataElements == 2) {
            yoff += dataOffsets[0];
            int d1 = dataOffsets[1] - dataOffsets[0];
            for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
                xoff = yoff;
                for (xstart=0; xstart < w; xstart++, xoff += pixelStride) {
                    outData[off++] = data[xoff];
                    outData[off++] = data[xoff + d1];
                }
            }
        } else if (numDataElements == 3) {
            yoff += dataOffsets[0];
            int d1 = dataOffsets[1] - dataOffsets[0];
            int d2 = dataOffsets[2] - dataOffsets[0];
            for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
                xoff = yoff;
                for (xstart=0; xstart < w; xstart++, xoff += pixelStride) {
                    outData[off++] = data[xoff];
                    outData[off++] = data[xoff + d1];
                    outData[off++] = data[xoff + d2];
                }
            }
        } else if (numDataElements == 4) {
            yoff += dataOffsets[0];
            int d1 = dataOffsets[1] - dataOffsets[0];
            int d2 = dataOffsets[2] - dataOffsets[0];
            int d3 = dataOffsets[3] - dataOffsets[0];
            for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
                xoff = yoff;
                for (xstart=0; xstart < w; xstart++, xoff += pixelStride) {
                    outData[off++] = data[xoff];
                    outData[off++] = data[xoff + d1];
                    outData[off++] = data[xoff + d2];
                    outData[off++] = data[xoff + d3];
                }
            }
        } else {
            for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
                xoff = yoff;
                for (xstart=0; xstart < w; xstart++, xoff += pixelStride) {
                    for (int c = 0; c < numDataElements; c++) {
                        outData[off++] = data[dataOffsets[c] + xoff];
                    }
                }
            }
        }

        return outData;
    }

    Stores the data elements for all bands at the specified location.
An ArrayIndexOutOfBounds exception will be thrown at runtime
if the pixel coordinate is out of bounds.
A ClassCastException will be thrown if the input object is non null
and references anything other than an array of transferType.
Params: x –        The X coordinate of the pixel location.
y –        The Y coordinate of the pixel location.
obj –      An object reference to an array of type defined by
                getTransferType() and length getNumDataElements()
                containing the pixel data to place at x,y./**
     * Stores the data elements for all bands at the specified location.
     * An ArrayIndexOutOfBounds exception will be thrown at runtime
     * if the pixel coordinate is out of bounds.
     * A ClassCastException will be thrown if the input object is non null
     * and references anything other than an array of transferType.
     * @param x        The X coordinate of the pixel location.
     * @param y        The Y coordinate of the pixel location.
     * @param obj      An object reference to an array of type defined by
     *                 getTransferType() and length getNumDataElements()
     *                 containing the pixel data to place at x,y.
     */
    public void setDataElements(int x, int y, Object obj) {
        if ((x < this.minX) || (y < this.minY) ||
            (x >= this.maxX) || (y >= this.maxY)) {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }
        byte inData[] = (byte[])obj;
        int off = (y-minY)*scanlineStride +
                  (x-minX)*pixelStride;

        for (int i = 0; i < numDataElements; i++) {
            data[dataOffsets[i] + off] = inData[i];
        }

        markDirty();
    }

    Stores the Raster data at the specified location.
An ArrayIndexOutOfBounds exception will be thrown at runtime
if the pixel coordinates are out of bounds.
Params: x –          The X coordinate of the pixel location.
y –          The Y coordinate of the pixel location.
inRaster –   Raster of data to place at x,y location./**
     * Stores the Raster data at the specified location.
     * An ArrayIndexOutOfBounds exception will be thrown at runtime
     * if the pixel coordinates are out of bounds.
     * @param x          The X coordinate of the pixel location.
     * @param y          The Y coordinate of the pixel location.
     * @param inRaster   Raster of data to place at x,y location.
     */
    public void setDataElements(int x, int y, Raster inRaster) {
        int srcOffX = inRaster.getMinX();
        int srcOffY = inRaster.getMinY();
        int dstOffX = x + srcOffX;
        int dstOffY = y + srcOffY;
        int width  = inRaster.getWidth();
        int height = inRaster.getHeight();
        if ((dstOffX < this.minX) || (dstOffY < this.minY) ||
            (dstOffX + width > this.maxX) || (dstOffY + height > this.maxY)) {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }

        setDataElements(dstOffX, dstOffY, srcOffX, srcOffY,
                        width, height, inRaster);
    }

    Stores the Raster data at the specified location.
Params: dstX – The absolute X coordinate of the destination pixel
that will receive a copy of the upper-left pixel of the
inRaster
dstY – The absolute Y coordinate of the destination pixel
that will receive a copy of the upper-left pixel of the
inRaster
srcX – The absolute X coordinate of the upper-left source
pixel that will be copied into this Raster
srcY – The absolute Y coordinate of the upper-left source
pixel that will be copied into this Raster
width –      The number of pixels to store horizontally
height –     The number of pixels to store vertically
inRaster –   Raster of data to place at x,y location./**
     * Stores the Raster data at the specified location.
     * @param dstX The absolute X coordinate of the destination pixel
     * that will receive a copy of the upper-left pixel of the
     * inRaster
     * @param dstY The absolute Y coordinate of the destination pixel
     * that will receive a copy of the upper-left pixel of the
     * inRaster
     * @param srcX The absolute X coordinate of the upper-left source
     * pixel that will be copied into this Raster
     * @param srcY The absolute Y coordinate of the upper-left source
     * pixel that will be copied into this Raster
     * @param width      The number of pixels to store horizontally
     * @param height     The number of pixels to store vertically
     * @param inRaster   Raster of data to place at x,y location.
     */
    private void setDataElements(int dstX, int dstY,
                                 int srcX, int srcY,
                                 int width, int height,
                                 Raster inRaster) {
        // Assume bounds checking has been performed previously
        if (width <= 0 || height <= 0) {
            return;
        }

        // Write inRaster (minX, minY) to (dstX, dstY)

        int srcOffX = inRaster.getMinX();
        int srcOffY = inRaster.getMinY();
        Object tdata = null;

        if (inRaster instanceof ByteInterleavedRaster) {
            ByteInterleavedRaster bct = (ByteInterleavedRaster) inRaster;
            byte[] bdata = bct.getDataStorage();
            // copy whole scanlines
            if (inOrder && bct.inOrder && pixelStride == bct.pixelStride) {
                int toff = bct.getDataOffset(0);
                int tss  = bct.getScanlineStride();
                int tps  = bct.getPixelStride();

                int srcOffset = toff +
                    (srcY - srcOffY) * tss +
                    (srcX - srcOffX) * tps;
                int dstOffset = dataOffsets[0] +
                    (dstY - minY) * scanlineStride +
                    (dstX - minX) * pixelStride;

                int nbytes = width*pixelStride;
                for (int tmpY=0; tmpY < height; tmpY++) {
                    System.arraycopy(bdata, srcOffset,
                                     data, dstOffset, nbytes);
                    srcOffset += tss;
                    dstOffset += scanlineStride;
                }
                markDirty();
                return;
            }
        }

        for (int startY=0; startY < height; startY++) {
            // Grab one scanline at a time
            tdata = inRaster.getDataElements(srcOffX, srcOffY+startY,
                                             width, 1, tdata);
            setDataElements(dstX, dstY + startY, width, 1, tdata);
        }
    }

    Stores an array of data elements into the specified rectangular
region.
An ArrayIndexOutOfBounds exception will be thrown at runtime
if the pixel coordinates are out of bounds.
A ClassCastException will be thrown if the input object is non null
and references anything other than an array of transferType.
The data elements in the
data array are assumed to be packed.  That is, a data element
for the nth band at location (x2, y2) would be found at:
     inData[((y2-y)*w + (x2-x))*numDataElements + n]

Params: x –        The X coordinate of the upper left pixel location.
y –        The Y coordinate of the upper left pixel location.
w –        Width of the pixel rectangle.
h –        Height of the pixel rectangle.
obj –      An object reference to an array of type defined by
                getTransferType() and length w*h*getNumDataElements()
                containing the pixel data to place between x,y and
                x+h, y+h./**
     * Stores an array of data elements into the specified rectangular
     * region.
     * An ArrayIndexOutOfBounds exception will be thrown at runtime
     * if the pixel coordinates are out of bounds.
     * A ClassCastException will be thrown if the input object is non null
     * and references anything other than an array of transferType.
     * The data elements in the
     * data array are assumed to be packed.  That is, a data element
     * for the nth band at location (x2, y2) would be found at:
     * <pre>
     *      inData[((y2-y)*w + (x2-x))*numDataElements + n]
     * </pre>
     * @param x        The X coordinate of the upper left pixel location.
     * @param y        The Y coordinate of the upper left pixel location.
     * @param w        Width of the pixel rectangle.
     * @param h        Height of the pixel rectangle.
     * @param obj      An object reference to an array of type defined by
     *                 getTransferType() and length w*h*getNumDataElements()
     *                 containing the pixel data to place between x,y and
     *                 x+h, y+h.
     */
    public void setDataElements(int x, int y, int w, int h, Object obj) {
        putByteData(x, y, w, h, (byte[])obj);
    }

    Stores a byte array of data elements into the specified rectangular
region for the specified band.
An ArrayIndexOutOfBounds exception will be thrown at runtime
if the pixel coordinates are out of bounds.
The data elements in the
data array are assumed to be packed.  That is, a data element
at location (x2, y2) would be found at:
     inData[((y2-y)*w + (x2-x)) + n]

Params: x –        The X coordinate of the upper left pixel location.
y –        The Y coordinate of the upper left pixel location.
w –        Width of the pixel rectangle.
h –        Height of the pixel rectangle.
band –     The band to set.
inData –   The data elements to be stored./**
     * Stores a byte array of data elements into the specified rectangular
     * region for the specified band.
     * An ArrayIndexOutOfBounds exception will be thrown at runtime
     * if the pixel coordinates are out of bounds.
     * The data elements in the
     * data array are assumed to be packed.  That is, a data element
     * at location (x2, y2) would be found at:
     * <pre>
     *      inData[((y2-y)*w + (x2-x)) + n]
     * </pre>
     * @param x        The X coordinate of the upper left pixel location.
     * @param y        The Y coordinate of the upper left pixel location.
     * @param w        Width of the pixel rectangle.
     * @param h        Height of the pixel rectangle.
     * @param band     The band to set.
     * @param inData   The data elements to be stored.
     */
    public void putByteData(int x, int y, int w, int h,
                            int band, byte[] inData) {
        // Bounds check for 'band' will be performed automatically
        if ((x < this.minX) || (y < this.minY) ||
            (x + w > this.maxX) || (y + h > this.maxY)) {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }
        int yoff = (y-minY)*scanlineStride +
                   (x-minX)*pixelStride + dataOffsets[band];
        int xoff;
        int off = 0;
        int xstart;
        int ystart;

        if (pixelStride == 1) {
            if (scanlineStride == w) {
                System.arraycopy(inData, 0, data, yoff, w*h);
            }
            else {
                for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
                    System.arraycopy(inData, off, data, yoff, w);
                    off += w;
                }
            }
        }
        else {
            for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
                xoff = yoff;
                for (xstart=0; xstart < w; xstart++, xoff += pixelStride) {
                    data[xoff] = inData[off++];
                }
            }
        }

        markDirty();
    }

    Stores a byte array of data elements into the specified rectangular
region.
An ArrayIndexOutOfBounds exception will be thrown at runtime
if the pixel coordinates are out of bounds.
The data elements in the
data array are assumed to be packed.  That is, a data element
for the nth band at location (x2, y2) would be found at:
     inData[((y2-y)*w + (x2-x))*numDataElements + n]

Params: x –        The X coordinate of the upper left pixel location.
y –        The Y coordinate of the upper left pixel location.
w –        Width of the pixel rectangle.
h –        Height of the pixel rectangle.
inData –   The data elements to be stored./**
     * Stores a byte array of data elements into the specified rectangular
     * region.
     * An ArrayIndexOutOfBounds exception will be thrown at runtime
     * if the pixel coordinates are out of bounds.
     * The data elements in the
     * data array are assumed to be packed.  That is, a data element
     * for the nth band at location (x2, y2) would be found at:
     * <pre>
     *      inData[((y2-y)*w + (x2-x))*numDataElements + n]
     * </pre>
     * @param x        The X coordinate of the upper left pixel location.
     * @param y        The Y coordinate of the upper left pixel location.
     * @param w        Width of the pixel rectangle.
     * @param h        Height of the pixel rectangle.
     * @param inData   The data elements to be stored.
     */
    public void putByteData(int x, int y, int w, int h, byte[] inData) {
        if ((x < this.minX) || (y < this.minY) ||
            (x + w > this.maxX) || (y + h > this.maxY)) {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }
        int yoff = (y-minY)*scanlineStride +
                   (x-minX)*pixelStride;

        int xoff;
        int off = 0;
        int xstart;
        int ystart;

        if (inOrder) {
            yoff += dataOffsets[0];
            int rowBytes = w*pixelStride;
            if (rowBytes == scanlineStride) {
                System.arraycopy(inData, 0, data, yoff, rowBytes*h);
            } else {
                for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
                    System.arraycopy(inData, off, data, yoff, rowBytes);
                    off += rowBytes;
                }
            }
        } else if (numDataElements == 1) {
            yoff += dataOffsets[0];
            for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
                xoff = yoff;
                for (xstart=0; xstart < w; xstart++, xoff += pixelStride) {
                    data[xoff] = inData[off++];
                }
            }
        } else if (numDataElements == 2) {
            yoff += dataOffsets[0];
            int d1 = dataOffsets[1] - dataOffsets[0];
            for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
                xoff = yoff;
                for (xstart=0; xstart < w; xstart++, xoff += pixelStride) {
                    data[xoff] = inData[off++];
                    data[xoff + d1] = inData[off++];
                }
            }
        } else if (numDataElements == 3) {
            yoff += dataOffsets[0];
            int d1 = dataOffsets[1] - dataOffsets[0];
            int d2 = dataOffsets[2] - dataOffsets[0];
            for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
                xoff = yoff;
                for (xstart=0; xstart < w; xstart++, xoff += pixelStride) {
                    data[xoff] = inData[off++];
                    data[xoff + d1] = inData[off++];
                    data[xoff + d2] = inData[off++];
                }
            }
        } else if (numDataElements == 4) {
            yoff += dataOffsets[0];
            int d1 = dataOffsets[1] - dataOffsets[0];
            int d2 = dataOffsets[2] - dataOffsets[0];
            int d3 = dataOffsets[3] - dataOffsets[0];
            for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
                xoff = yoff;
                for (xstart=0; xstart < w; xstart++, xoff += pixelStride) {
                    data[xoff] = inData[off++];
                    data[xoff + d1] = inData[off++];
                    data[xoff + d2] = inData[off++];
                    data[xoff + d3] = inData[off++];
                }
            }
        } else {
            for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
                xoff = yoff;
                for (xstart=0; xstart < w; xstart++, xoff += pixelStride) {
                    for (int c = 0; c < numDataElements; c++) {
                        data[dataOffsets[c] + xoff] = inData[off++];
                    }
                }
            }
        }

        markDirty();
    }

    public int getSample(int x, int y, int b) {
        if ((x < this.minX) || (y < this.minY) ||
            (x >= this.maxX) || (y >= this.maxY)) {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }
        if (packed) {
            int offset = y*scanlineStride + x + dbOffsetPacked;
            byte sample = data[offset];
            return (sample & bitMasks[b]) >>> bitOffsets[b];
        } else {
            int offset = y*scanlineStride + x*pixelStride + dbOffset;
            return data[offset + dataOffsets[b]] & 0xff;
        }
    }

    public void setSample(int x, int y, int b, int s) {
        if ((x < this.minX) || (y < this.minY) ||
            (x >= this.maxX) || (y >= this.maxY)) {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }
        if (packed) {
            int offset = y*scanlineStride + x + dbOffsetPacked;
            int bitMask = bitMasks[b];

            byte value = data[offset];
            value &= ~bitMask;
            value |= (s << bitOffsets[b]) & bitMask;
            data[offset] = value;
        } else {
            int offset = y*scanlineStride + x*pixelStride + dbOffset;
            data[offset + dataOffsets[b]] = (byte)s;
        }

        markDirty();
    }

    public int[] getSamples(int x, int y, int w, int h, int b,
                            int[] iArray) {
        if ((x < this.minX) || (y < this.minY) ||
            (x + w > this.maxX) || (y + h > this.maxY)) {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }
        int samples[];
        if (iArray != null) {
            samples = iArray;
        } else {
            samples = new int [w*h];
        }

        int lineOffset = y*scanlineStride + x*pixelStride;
        int dstOffset = 0;

        if (packed) {
            lineOffset += dbOffsetPacked;
            int bitMask = bitMasks[b];
            int bitOffset = bitOffsets[b];

            for (int j = 0; j < h; j++) {
                int sampleOffset = lineOffset;
                for (int i = 0; i < w; i++) {
                    int value = data[sampleOffset++];
                    samples[dstOffset++] = ((value & bitMask) >>> bitOffset);
                }
                lineOffset += scanlineStride;
            }
        } else {
            lineOffset += dbOffset + dataOffsets[b];
            for (int j = 0; j < h; j++) {
                int sampleOffset = lineOffset;
                for (int i = 0; i < w; i++) {
                    samples[dstOffset++] = data[sampleOffset] & 0xff;
                    sampleOffset += pixelStride;
                }
                lineOffset += scanlineStride;
            }
        }

        return samples;
    }

    public void setSamples(int x, int y, int w, int h, int b, int iArray[]) {
        if ((x < this.minX) || (y < this.minY) ||
            (x + w > this.maxX) || (y + h > this.maxY)) {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }
        int lineOffset = y*scanlineStride + x*pixelStride;
        int srcOffset = 0;

        if (packed) {
            lineOffset += dbOffsetPacked;
            int bitMask = bitMasks[b];

            for (int j = 0; j < h; j++) {
                int sampleOffset = lineOffset;
                for (int i = 0; i < w; i++) {
                    byte value = data[sampleOffset];
                    value &= ~bitMask;
                    int sample = iArray[srcOffset++];
                    value |= (sample << bitOffsets[b]) & bitMask;
                    data[sampleOffset++] = value;
                }
                lineOffset += scanlineStride;
            }
        } else {
            lineOffset += dbOffset + dataOffsets[b];
            for (int i = 0; i < h; i++) {
                int sampleOffset = lineOffset;
                for (int j = 0; j < w; j++) {
                    data[sampleOffset] = (byte)iArray[srcOffset++];
                    sampleOffset += pixelStride;
                }
                lineOffset += scanlineStride;
            }
        }

        markDirty();
    }

    public int[] getPixels(int x, int y, int w, int h, int[] iArray) {
        if ((x < this.minX) || (y < this.minY) ||
            (x + w > this.maxX) || (y + h > this.maxY)) {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }
        int pixels[];
        if (iArray != null) {
            pixels = iArray;
        } else {
            pixels = new int[w*h*numBands];
        }

        int lineOffset = y*scanlineStride + x*pixelStride;
        int dstOffset = 0;

        if (packed) {
            lineOffset += dbOffsetPacked;
            for (int j = 0; j < h; j++) {
                for (int i = 0; i < w; i++) {
                    int value = data[lineOffset + i];
                    for (int k = 0; k < numBands; k++) {
                        pixels[dstOffset++] =
                            (value & bitMasks[k]) >>> bitOffsets[k];
                    }
                }
                lineOffset += scanlineStride;
            }
        } else {
            lineOffset += dbOffset;
            int d0 = dataOffsets[0];

            if (numBands == 1) {
                for (int j = 0; j < h; j++) {
                    int pixelOffset = lineOffset + d0;
                    for (int i = 0; i < w; i++) {
                        pixels[dstOffset++] = data[pixelOffset] & 0xff;
                        pixelOffset += pixelStride;
                    }
                    lineOffset += scanlineStride;
                }
            } else if (numBands == 2) {
                int d1 = dataOffsets[1] - d0;
                for (int j = 0; j < h; j++) {
                    int pixelOffset = lineOffset + d0;
                    for (int i = 0; i < w; i++) {
                        pixels[dstOffset++] = data[pixelOffset] & 0xff;
                        pixels[dstOffset++] = data[pixelOffset + d1] & 0xff;
                        pixelOffset += pixelStride;
                    }
                    lineOffset += scanlineStride;
                }
            } else if (numBands == 3) {
                int d1 = dataOffsets[1] - d0;
                int d2 = dataOffsets[2] - d0;
                for (int j = 0; j < h; j++) {
                    int pixelOffset = lineOffset + d0;
                    for (int i = 0; i < w; i++) {
                        pixels[dstOffset++] = data[pixelOffset] & 0xff;
                        pixels[dstOffset++] = data[pixelOffset + d1] & 0xff;
                        pixels[dstOffset++] = data[pixelOffset + d2] & 0xff;
                        pixelOffset += pixelStride;
                    }
                    lineOffset += scanlineStride;
                }
            } else if (numBands == 4) {
                int d1 = dataOffsets[1] - d0;
                int d2 = dataOffsets[2] - d0;
                int d3 = dataOffsets[3] - d0;
                for (int j = 0; j < h; j++) {
                    int pixelOffset = lineOffset + d0;
                    for (int i = 0; i < w; i++) {
                        pixels[dstOffset++] = data[pixelOffset] & 0xff;
                        pixels[dstOffset++] = data[pixelOffset + d1] & 0xff;
                        pixels[dstOffset++] = data[pixelOffset + d2] & 0xff;
                        pixels[dstOffset++] = data[pixelOffset + d3] & 0xff;
                        pixelOffset += pixelStride;
                    }
                    lineOffset += scanlineStride;
                }
            } else {
                for (int j = 0; j < h; j++) {
                    int pixelOffset = lineOffset;
                    for (int i = 0; i < w; i++) {
                        for (int k = 0; k < numBands; k++) {
                            pixels[dstOffset++] =
                                data[pixelOffset + dataOffsets[k]] & 0xff;
                        }
                        pixelOffset += pixelStride;
                    }
                    lineOffset += scanlineStride;
                }
            }
        }

        return pixels;
    }

    public void setPixels(int x, int y, int w, int h, int[] iArray) {
        if ((x < this.minX) || (y < this.minY) ||
            (x + w > this.maxX) || (y + h > this.maxY)) {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }
        int lineOffset = y*scanlineStride + x*pixelStride;
        int srcOffset = 0;

        if (packed) {
            lineOffset += dbOffsetPacked;
            for (int j = 0; j < h; j++) {
                for (int i = 0; i < w; i++) {
                    int value = 0;
                    for (int k = 0; k < numBands; k++) {
                        int srcValue = iArray[srcOffset++];
                        value |= ((srcValue << bitOffsets[k])
                                  & bitMasks[k]);
                    }
                    data[lineOffset + i] = (byte)value;
                }
                lineOffset += scanlineStride;
            }
        } else {
            lineOffset += dbOffset;
            int d0 = dataOffsets[0];

            if (numBands == 1) {
                for (int j = 0; j < h; j++) {
                    int pixelOffset = lineOffset + d0;
                    for (int i = 0; i < w; i++) {
                        data[pixelOffset] = (byte)iArray[srcOffset++];
                        pixelOffset += pixelStride;
                    }
                    lineOffset += scanlineStride;
                }
            } else if (numBands == 2) {
                int d1 = dataOffsets[1] - d0;
                for (int j = 0; j < h; j++) {
                    int pixelOffset = lineOffset + d0;
                    for (int i = 0; i < w; i++) {
                        data[pixelOffset] = (byte)iArray[srcOffset++];
                        data[pixelOffset + d1] = (byte)iArray[srcOffset++];
                        pixelOffset += pixelStride;
                    }
                    lineOffset += scanlineStride;
                }
            } else if (numBands == 3) {
                int d1 = dataOffsets[1] - d0;
                int d2 = dataOffsets[2] - d0;
                for (int j = 0; j < h; j++) {
                    int pixelOffset = lineOffset + d0;
                    for (int i = 0; i < w; i++) {
                        data[pixelOffset] = (byte)iArray[srcOffset++];
                        data[pixelOffset + d1] = (byte)iArray[srcOffset++];
                        data[pixelOffset + d2] = (byte)iArray[srcOffset++];
                        pixelOffset += pixelStride;
                    }
                    lineOffset += scanlineStride;
                }
            } else if (numBands == 4) {
                int d1 = dataOffsets[1] - d0;
                int d2 = dataOffsets[2] - d0;
                int d3 = dataOffsets[3] - d0;
                for (int j = 0; j < h; j++) {
                    int pixelOffset = lineOffset + d0;
                    for (int i = 0; i < w; i++) {
                        data[pixelOffset] = (byte)iArray[srcOffset++];
                        data[pixelOffset + d1] = (byte)iArray[srcOffset++];
                        data[pixelOffset + d2] = (byte)iArray[srcOffset++];
                        data[pixelOffset + d3] = (byte)iArray[srcOffset++];
                        pixelOffset += pixelStride;
                    }
                    lineOffset += scanlineStride;
                }
            } else {
                for (int j = 0; j < h; j++) {
                    int pixelOffset = lineOffset;
                    for (int i = 0; i < w; i++) {
                        for (int k = 0; k < numBands; k++) {
                            data[pixelOffset + dataOffsets[k]] =
                                (byte)iArray[srcOffset++];
                        }
                        pixelOffset += pixelStride;
                    }
                    lineOffset += scanlineStride;
                }
            }
        }

        markDirty();
    }

    public void setRect(int dx, int dy, Raster srcRaster) {
        if (!(srcRaster instanceof ByteInterleavedRaster)) {
            super.setRect(dx, dy, srcRaster);
            return;
        }

        int width  = srcRaster.getWidth();
        int height = srcRaster.getHeight();
        int srcOffX = srcRaster.getMinX();
        int srcOffY = srcRaster.getMinY();
        int dstOffX = dx+srcOffX;
        int dstOffY = dy+srcOffY;

        // Clip to this raster
        if (dstOffX < this.minX) {
            int skipX = minX - dstOffX;
            width -= skipX;
            srcOffX += skipX;
            dstOffX = this.minX;
        }
        if (dstOffY < this.minY) {
            int skipY = this.minY - dstOffY;
            height -= skipY;
            srcOffY += skipY;
            dstOffY = this.minY;
        }
        if (dstOffX+width > this.maxX) {
            width = this.maxX - dstOffX;
        }
        if (dstOffY+height > this.maxY) {
            height = this.maxY - dstOffY;
        }

        setDataElements(dstOffX, dstOffY,
                        srcOffX, srcOffY,
                        width, height, srcRaster);
    }


    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.
Params: x –               X offset.
y –               Y offset.
width –           Width (in pixels) of the subraster.
height –          Height (in pixels) of the subraster.
x0 –              Translated X origin of the subraster.
y0 –              Translated Y origin of the subraster.
bandList –        Array of band indices.
Throws: RasterFormatException – 
           if the specified bounding box is outside of the parent raster./**
     * 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 Raster createChild(int x, int y,
                              int width, int height,
                              int x0, int y0, int[] bandList) {
        WritableRaster newRaster = createWritableChild(x, y,
                                                       width, height,
                                                       x0, y0,
                                                       bandList);
        return (Raster) newRaster;
    }

    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
DataBuffer as the parent Raster, but using different offsets.
Params: x –               X offset.
y –               Y offset.
width –           Width (in pixels) of the subraster.
height –          Height (in pixels) of the subraster.
x0 –              Translated X origin of the subraster.
y0 –              Translated Y origin of the subraster.
bandList –        Array of band indices.
Throws: RasterFormatException – 
           if the specified bounding box is outside of the parent Raster./**
     * 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
     * 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 ByteInterleavedRaster(sm,
                                       (DataBufferByte) dataBuffer,
                                       new Rectangle(x0, y0, width, height),
                                       new Point(sampleModelTranslateX+deltaX,
                                                 sampleModelTranslateY+deltaY),
                                       this);
    }

    Creates a Raster with the same layout but using a different
width and height, and with new zeroed data arrays.
/**
     * 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 ByteInterleavedRaster(sm, new Point(0,0));

    }

    Creates a Raster with the same layout and the same
width and height, and with new zeroed data arrays.  If
the Raster is a subRaster, this will call
createCompatibleRaster(width, height).
/**
     * Creates a Raster with the same layout and the same
     * width and height, and with new zeroed data arrays.  If
     * the Raster is a subRaster, this will call
     * createCompatibleRaster(width, height).
     */
    public WritableRaster createCompatibleWritableRaster() {
        return createCompatibleWritableRaster(width,height);
    }

    public String toString() {
        return new String ("ByteInterleavedRaster: width = "+width+" height = "
                           + height
                           +" #numDataElements "+numDataElements
                           //  +" xOff = "+xOffset+" yOff = "+yOffset
                           +" dataOff[0] = "+dataOffsets[0]);
    }

//    /**
//     * For debugging...  prints a region of a one-band ByteInterleavedRaster
//     */
//    public void print(int x, int y, int w, int h) {
//        // REMIND:  Only works for 1 band!
//        System.out.println(this);
//        int offset = dataOffsets[0] + y*scanlineStride + x*pixelStride;
//        int off;
//        for (int yoff=0; yoff < h; yoff++, offset += scanlineStride) {
//            off = offset;
//            System.out.print("Line "+(y+yoff)+": ");
//            for (int xoff = 0; xoff < w; xoff++, off+= pixelStride) {
//                String s = Integer.toHexString(data[off]);
//                if (s.length() == 8) {
//                    s = s.substring(6,8);
//                }
//                System.out.print(s+" ");
//            }
//            System.out.println("");
//        }
//    }
}
Params:	x – The X coordinate of the pixel location. y – The Y coordinate of the pixel location. obj – An object reference to an array of type defined by getTransferType() and length getNumDataElements(). If null an array of appropriate type and size will be allocated.
Returns:	An object reference to an array of type defined by getTransferType() with the request pixel data.
Params:	x – The X coordinate of the upper left pixel location. y – The Y coordinate of the upper left pixel location. w – Width of the pixel rectangle. h – Height of the pixel rectangle. obj – An object reference to an array of type defined by getTransferType() and length whgetNumDataElements(). If null an array of appropriate type and size will be allocated.
Returns:	An object reference to an array of type defined by getTransferType() with the request pixel data.
Params:	x – X offset. y – Y offset. width – Width (in pixels) of the subraster. height – Height (in pixels) of the subraster. x0 – Translated X origin of the subraster. y0 – Translated Y origin of the subraster. bandList – Array of band indices.
Throws:	RasterFormatException – if the specified bounding box is outside of the parent raster.
/

java/ 11/ java.desktop/sun/awt/image/ByteInterleavedRaster.java
