java/8 : sun/awt/image/IntegerInterleavedRaster.java

IntegerInterleavedRaster
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).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 *
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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.SinglePixelPackedSampleModel;
import java.awt.image.DataBuffer;
import java.awt.image.DataBufferInt;
import java.awt.Rectangle;
import java.awt.Point;

This class defines a Raster with pixels consisting of one or more 32-bit
data elements stored in close proximity to each other in a integer array.
The bit precision per data element is that
of the data type (that is, the bit precision for this raster is 32).
There is only one pixel stride and one scanline stride for all
bands.  For a given pixel, all samples fit in N data elements and these
N data elements hold samples for only one pixel.  This type of Raster
can be used with a PackedColorModel.

For example, if there is only one data element per pixel, a
SinglePixelPackedSampleModel can be used to represent multiple
bands with a PackedColorModel (including a DirectColorModel) for
color interpretation.
/**
 * This class defines a Raster with pixels consisting of one or more 32-bit
 * data elements stored in close proximity to each other in a integer array.
 * The bit precision per data element is that
 * of the data type (that is, the bit precision for this raster is 32).
 * There is only one pixel stride and one scanline stride for all
 * bands.  For a given pixel, all samples fit in N data elements and these
 * N data elements hold samples for only one pixel.  This type of Raster
 * can be used with a PackedColorModel.
 * <p>
 * For example, if there is only one data element per pixel, a
 * SinglePixelPackedSampleModel can be used to represent multiple
 * bands with a PackedColorModel (including a DirectColorModel) for
 * color interpretation.
 *
 */
public class IntegerInterleavedRaster extends IntegerComponentRaster {

    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 IntegerInterleavedRaster 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.
 @param sampleModel     The SampleModel that specifies the layout.
 @param origin          The Point that specified the origin.
/**
     *  Constructs a IntegerInterleavedRaster 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.
     *  @param sampleModel     The SampleModel that specifies the layout.
     *  @param origin          The Point that specified the origin.
     */
    public IntegerInterleavedRaster(SampleModel sampleModel,
                                     Point origin) {
        this(sampleModel,
             sampleModel.createDataBuffer(),
             new Rectangle(origin.x,
                           origin.y,
                           sampleModel.getWidth(),
                           sampleModel.getHeight()),
             origin,
             null);
    }

    Constructs a IntegerInterleavedRaster 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.
Params: sampleModel –     The SampleModel that specifies the layout.
dataBuffer –      The DataBufferInt that contains the image data.
origin –          The Point that specifies the origin./**
     * Constructs a IntegerInterleavedRaster 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 IntegerInterleavedRaster(SampleModel sampleModel,
                                     DataBuffer dataBuffer,
                                     Point origin) {
        this(sampleModel,
             dataBuffer,
             new Rectangle(origin.x,
                           origin.y,
                           sampleModel.getWidth(),
                           sampleModel.getHeight()),
             origin,
             null);
    }

   Constructs a IntegerInterleavedRaster with the given SampleModel,
DataBuffer, and parent.  DataBuffer must be a DataBufferInt and
SampleModel must be of type SinglePixelPackedSampleModel.
When translated into the base Raster's
coordinate system, aRegion must be contained by the base Raster.
Origin is the coodinate 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 DataBufferInt 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 IntegerInterleavedRaster with the given SampleModel,
     * DataBuffer, and parent.  DataBuffer must be a DataBufferInt and
     * SampleModel must be of type SinglePixelPackedSampleModel.
     * When translated into the base Raster's
     * coordinate system, aRegion must be contained by the base Raster.
     * Origin is the coodinate 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 DataBufferInt 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 IntegerInterleavedRaster(SampleModel sampleModel,
                                     DataBuffer dataBuffer,
                                     Rectangle aRegion,
                                     Point origin,
                                     IntegerInterleavedRaster parent){
        super(sampleModel,dataBuffer,aRegion,origin,parent);
        this.maxX = minX + width;
        this.maxY = minY + height;
        if (!(dataBuffer instanceof DataBufferInt)) {
           throw new RasterFormatException("IntegerInterleavedRasters must have" +
                "integer DataBuffers");
        }
        DataBufferInt dbi = (DataBufferInt)dataBuffer;
        this.data = stealData(dbi, 0);

        if (sampleModel instanceof SinglePixelPackedSampleModel) {
            SinglePixelPackedSampleModel sppsm =
                    (SinglePixelPackedSampleModel)sampleModel;
            this.scanlineStride = sppsm.getScanlineStride();
            this.pixelStride    = 1;
            this.dataOffsets = new int[1];
            this.dataOffsets[0] = dbi.getOffset();
            this.bandOffset = this.dataOffsets[0];
            int xOffset = aRegion.x - origin.x;
            int yOffset = aRegion.y - origin.y;
            dataOffsets[0] += xOffset+yOffset*scanlineStride;
            this.numDataElems = sppsm.getNumDataElements();
        } else {
            throw new RasterFormatException("IntegerInterleavedRasters must have"+
                                            " SinglePixelPackedSampleModel");
        }
        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 (int[]) dataOffsets.clone();
    }

    Returns 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.
/**
     * Returns 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.
     */
    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.
/**
     * 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.
     */
    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 int[] 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.
outData –  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 outData  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!");
        }
        int outData[];
        if (obj == null) {
            outData = new int[1];
        } else {
            outData = (int[])obj;
        }
        int off = (y-minY)*scanlineStride + (x-minX) + dataOffsets[0];
        outData[0] = data[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.
      int[] bandData = (int[])raster.getDataElements(x, y, w, h, null);
      int numDataElements = raster.getNumDataElements();
      int[] pixel = new int[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.
width –    Width of the pixel rectangle.
height –   Height of the pixel rectangle.
outData –  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>
     *       int[] bandData = (int[])raster.getDataElements(x, y, w, h, null);
     *       int numDataElements = raster.getNumDataElements();
     *       int[] pixel = new int[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 width    Width of the pixel rectangle.
     * @param height   Height of the pixel rectangle.
     * @param outData  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) {
        if ((x < this.minX) || (y < this.minY) ||
            (x + w > this.maxX) || (y + h > this.maxY)) {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }
        int outData[];
        if (obj instanceof int[]) {
            outData = (int[])obj;
        } else {
            outData = new int[w*h];
        }
        int yoff = (y-minY)*scanlineStride + (x-minX) + dataOffsets[0];
        int off = 0;

        for (int ystart = 0; ystart < h; ystart++) {
            System.arraycopy(data, yoff, outData, off, w);
            off += w;
            yoff += scanlineStride;
        }

        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.
inData –   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 inData   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!");
        }
        int inData[] = (int[])obj;

        int off = (y-minY)*scanlineStride + (x-minX) + dataOffsets[0];

        data[off] = inData[0];

        markDirty();
    }


    Stores the Raster data at the specified location.
The transferType of the inputRaster must match this raster.
An ArrayIndexOutOfBoundsException 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.
     * The transferType of the inputRaster must match this raster.
     * An ArrayIndexOutOfBoundsException 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 dstOffX = x + inRaster.getMinX();
        int dstOffY = y + inRaster.getMinY();
        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, 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
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 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 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();
        int tdata[] = null;

        if (inRaster instanceof IntegerInterleavedRaster) {
            IntegerInterleavedRaster ict = (IntegerInterleavedRaster) inRaster;

            // Extract the raster parameters
            tdata    = ict.getDataStorage();
            int tss  = ict.getScanlineStride();
            int toff = ict.getDataOffset(0);

            int srcOffset = toff;
            int dstOffset = dataOffsets[0]+(dstY-minY)*scanlineStride+
                                           (dstX-minX);


            // Fastest case.  We can copy scanlines
            // Loop through all of the scanlines and copy the data
            for (int startY=0; startY < height; startY++) {
                System.arraycopy(tdata, srcOffset, data, dstOffset, width);
                srcOffset += tss;
                dstOffset += scanlineStride;
            }
            markDirty();
            return;
        }

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

    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.
inData –   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 inData   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) {
        if ((x < this.minX) || (y < this.minY) ||
            (x + w > this.maxX) || (y + h > this.maxY)) {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }
        int inData[] = (int[])obj;
        int yoff = (y-minY)*scanlineStride + (x-minX) + dataOffsets[0];
        int off = 0;

        for (int ystart = 0; ystart < h; ystart++) {
            System.arraycopy(inData, off, data, yoff, w);
            off += w;
            yoff += scanlineStride;
        }

        markDirty();
    }

    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 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 IntegerInterleavedRaster(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. 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. 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[]) {
        return createWritableChild(x, y, width, height, x0, y0, bandList);
    }


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

    Creates a raster with the same data 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 data 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 ("IntegerInterleavedRaster: width = "+width
                           +" height = " + height
                           +" #Bands = " + numBands
                           +" xOff = "+sampleModelTranslateX
                           +" yOff = "+sampleModelTranslateY
                           +" dataOffset[0] "+dataOffsets[0]);
    }

//    /**
//     * For debugging...  prints a region of a one-band IntegerInterleavedRaster
//     */
//    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 "+(sampleModelTranslateY+y+yoff)+": ");
//            for (int xoff = 0; xoff < w; xoff++, off+= pixelStride) {
//                System.out.print(Integer.toHexString(data[off])+" ");
//            }
//            System.out.println("");
//        }
//    }

}
Params:	x – The X coordinate of the pixel location. y – The Y coordinate of the pixel location. outData – 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. width – Width of the pixel rectangle. height – Height of the pixel rectangle. outData – 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/ 8/ sun/awt/image/IntegerInterleavedRaster.java
