java/15 : java.desktop/sun/awt/image/ByteBandedRaster.java

ByteBandedRaster
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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 *
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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.BandedSampleModel;
import java.awt.image.DataBufferByte;
import java.awt.Rectangle;
import java.awt.Point;

This class defines a Raster with pixels consisting of multiple
8-bit samples stored in possibly separate arrays for each band.
Operations on sets of pixels are performed on a given band in the
Raster before moving on to the next band.  The arrays used for
storage may be distinct or shared between some or all of the bands.
Each band additionally has an offset that is added to determine the
DataBuffer location of each pixel.
There is only one scanline stride for all bands.  The pixel stride
is always equal to one.  This type of raster can be used with a
ComponentColorModel. This class requires a BandedSampleModel.
/**
 * This class defines a Raster with pixels consisting of multiple
 * 8-bit samples stored in possibly separate arrays for each band.
 * Operations on sets of pixels are performed on a given band in the
 * Raster before moving on to the next band.  The arrays used for
 * storage may be distinct or shared between some or all of the bands.
 * Each band additionally has an offset that is added to determine the
 * DataBuffer location of each pixel.
 *
 * There is only one scanline stride for all bands.  The pixel stride
 * is always equal to one.  This type of raster can be used with a
 * ComponentColorModel. This class requires a BandedSampleModel.
 *
 */
public class ByteBandedRaster extends SunWritableRaster {

    Data offsets for each band of image data. /** Data offsets for each band of image data. */
    int[]         dataOffsets;

    Scanline stride of the image data contained in this Raster. /** Scanline stride of the image data contained in this Raster. */
    int           scanlineStride;

    The image data array. /** The image data array. */
    byte[][]      data;

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

     Constructs a ByteBanded Raster 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 DataBufferShort compatible with SampleModel.
 SampleModel must be of type BandedSampleModel.
 @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.
/**
     *  Constructs a ByteBanded Raster 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 DataBufferShort compatible with SampleModel.
     *  SampleModel must be of type BandedSampleModel.
     *  @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 ByteBandedRaster(SampleModel sampleModel,
                            DataBufferByte dataBuffer,
                            Point origin)
    {
        this(sampleModel, dataBuffer,
             new Rectangle(origin.x , origin.y,
                           sampleModel.getWidth(),
                           sampleModel.getHeight()),
             origin, null);
    }

     Constructs a ByteBandedRaster with the given sampleModel,
 DataBuffer, and parent. DataBuffer must be a DataBufferShort and
 SampleModel must be of type BandedSampleModel.
 When translated into the base Raster's
 coordinate system, aRegion must be contained by the base Raster.
 Origin is the coordinate in the new Raster's coordinate system of
 the origin of the base Raster.  (The base Raster is the Raster's
 ancestor which has no parent.)
 Note that this constructor should generally be called by other
 constructors or create methods, it should not be used directly.
 @param sampleModel     The SampleModel that specifies the layout.
 @param dataBuffer      The 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.
/**
     *  Constructs a ByteBandedRaster with the given sampleModel,
     *  DataBuffer, and parent. DataBuffer must be a DataBufferShort and
     *  SampleModel must be of type BandedSampleModel.
     *  When translated into the base Raster's
     *  coordinate system, aRegion must be contained by the base Raster.
     *  Origin is the coordinate in the new Raster's coordinate system of
     *  the origin of the base Raster.  (The base Raster is the Raster's
     *  ancestor which has no parent.)
     *
     *  Note that this constructor should generally be called by other
     *  constructors or create methods, it should not be used directly.
     *  @param sampleModel     The SampleModel that specifies the layout.
     *  @param dataBuffer      The 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 ByteBandedRaster(SampleModel sampleModel,
                            DataBufferByte dataBuffer,
                            Rectangle aRegion,
                            Point origin,
                            ByteBandedRaster parent)
    {
        super(sampleModel, dataBuffer, aRegion, origin, parent);
        this.maxX = minX + width;
        this.maxY = minY + height;

        if (sampleModel instanceof BandedSampleModel) {
            BandedSampleModel bsm = (BandedSampleModel)sampleModel;
            this.scanlineStride = bsm.getScanlineStride();
            int[] bankIndices = bsm.getBankIndices();
            int[] bandOffsets = bsm.getBandOffsets();
            int[] dOffsets = dataBuffer.getOffsets();
            dataOffsets = new int[bankIndices.length];
            data = new byte[bankIndices.length][];
            int xOffset = aRegion.x - origin.x;
            int yOffset = aRegion.y - origin.y;
            for (int i = 0; i < bankIndices.length; i++) {
               data[i] = stealData(dataBuffer, bankIndices[i]);
               dataOffsets[i] = dOffsets[bankIndices[i]] +
                   xOffset + yOffset*scanlineStride + bandOffsets[i];
            }
        } else {
            throw new RasterFormatException("ByteBandedRasters must have"+
                "BandedSampleModels");
        }
        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 data offset for the specified band.  The data offset
is the index into the band's data array
in which the first sample of the first scanline is stored.
Params: band – The band whose offset is returned./**
     * Returns data offset for the specified band.  The data offset
     * is the index into the band's 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 the pixel stride, which is always equal to one for
a Raster with a BandedSampleModel.
/**
     * Returns the pixel stride, which is always equal to one for
     * a Raster with a BandedSampleModel.
     */
    public int getPixelStride() {
        return 1;
    }

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

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

    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);

        for (int band = 0; band < numDataElements; band++) {
            outData[band] = data[band][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.getDataElement(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.getDataElement(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) {
        if ((x < this.minX) || (y < this.minY) ||
            (x + w > this.maxX) || (y + h > this.maxY)) {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }
        byte[] outData;
        if (obj == null) {
            outData = new byte[numDataElements*w*h];
        } else {
            outData = (byte[])obj;
        }
        int yoff = (y-minY)*scanlineStride + (x-minX);

        for (int c = 0; c < numDataElements; c++) {
            int off = c;
            byte[] bank = data[c];
            int dataOffset = dataOffsets[c];

            int yoff2 = yoff;
            for (int ystart=0; ystart < h; ystart++, yoff2 += scanlineStride) {
                int xoff = dataOffset + yoff2;
                for (int xstart=0; xstart < w; xstart++) {
                    outData[off] = bank[xoff++];
                    off += numDataElements;
                }
            }
        }

        return outData;
    }

    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[scanlineStride*h];
        }
        int yoff = (y-minY)*scanlineStride + (x-minX) + dataOffsets[band];

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

        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*scanlineStride*h];
        }
        int yoff = (y-minY)*scanlineStride + (x-minX);

        for (int c = 0; c < numDataElements; c++) {
            int off = c;
            byte[] bank = data[c];
            int dataOffset = dataOffsets[c];

            // REMIND: Should keep track if dataoffsets are in a nice order
            int yoff2 = yoff;
            for (int ystart=0; ystart < h; ystart++, yoff2 += scanlineStride) {
                int xoff = dataOffset + yoff2;
                for (int xstart=0; xstart < w; xstart++) {
                    outData[off] = bank[xoff++];
                    off += numDataElements;
                }
            }
        }

        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);
        for (int i = 0; i < numDataElements; i++) {
            data[i][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 coordinate is 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 coordinate is 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 = inRaster.getMinX() + x;
        int dstOffY = inRaster.getMinY() + y;
        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;
        }

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

//      // REMIND: Do something faster!
//      if (inRaster instanceof ByteBandedRaster) {
//      }

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

        for (int c = 0; c < numDataElements; c++) {
            int off = c;
            byte[] bank = data[c];
            int dataOffset = dataOffsets[c];

            int yoff2 = yoff;
            for (int ystart=0; ystart < h; ystart++, yoff2 += scanlineStride) {
                int xoff = dataOffset + yoff2;
                for (int xstart=0; xstart < w; xstart++) {
                    bank[xoff++] = inData[off];
                    off += numDataElements;
                }
            }
        }

        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.
band –     The band to set.
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 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) + dataOffsets[band];
        int xoff;
        int off = 0;
        int xstart;
        int ystart;

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

        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);

        for (int c = 0; c < numDataElements; c++) {
            int off = c;
            byte[] bank = data[c];
            int dataOffset = dataOffsets[c];

            int yoff2 = yoff;
            for (int ystart=0; ystart < h; ystart++, yoff2 += scanlineStride) {
                int xoff = dataOffset + yoff2;
                for (int xstart=0; xstart < w; xstart++) {
                    bank[xoff++] = inData[off];
                    off += numDataElements;
                }
            }
        }

        markDirty();
    }

    Creates a Writable subraster given a region of the raster.  The x and y
coordinates specify the horizontal and vertical offsets
from the upper-left corner of this raster to the upper-left corner
of the subraster.  A subset of the bands of the parent Raster may
be specified.  If this is null, then all the bands are present in the
subRaster. A translation to the subRaster may also be specified.
Note that the subraster will reference the same
DataBuffers as the parent raster, but using different offsets.
Params: x –               X offset.
y –               Y offset.
width –           Width of the subraster.
height –          Height 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
     * DataBuffers as the parent raster, but using different offsets.
     * @param x               X offset.
     * @param y               Y offset.
     * @param width           Width of the subraster.
     * @param height          Height 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.width + this.minX)) {
            throw new RasterFormatException("(x + width) is outside raster") ;
        }
        if ((y+height < y) || (y+height > this.height + this.minY)) {
            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 ByteBandedRaster(sm,
                                    (DataBufferByte) dataBuffer,
                                    new Rectangle(x0,y0,width,height),
                                    new Point(sampleModelTranslateX+deltaX,
                                              sampleModelTranslateY+deltaY),
                                    this);
    }

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

    Verify that the layout parameters are consistent with the data.
Verifies whether the data buffer has enough data for the raster,
taking into account offsets, after ensuring all offsets are >=0.
Throws: RasterFormatException – if a problem is detected./**
     * Verify that the layout parameters are consistent with the data.
     * Verifies whether the data buffer has enough data for the raster,
     * taking into account offsets, after ensuring all offsets are >=0.
     * @throws RasterFormatException if a problem is detected.
     */
    private void verify() {

        /* Need to re-verify the dimensions since a sample model may be
         * specified to the constructor
         */
        if (width <= 0 || height <= 0 ||
            height > (Integer.MAX_VALUE / width))
        {
            throw new RasterFormatException("Invalid raster dimension");
        }

        if (scanlineStride < 0 ||
            scanlineStride > (Integer.MAX_VALUE / height))
        {
            // integer overflow
            throw new RasterFormatException("Incorrect scanline stride: "
                    + scanlineStride);
        }

        if ((long)minX - sampleModelTranslateX < 0 ||
            (long)minY - sampleModelTranslateY < 0) {

            throw new RasterFormatException("Incorrect origin/translate: (" +
                    minX + ", " + minY + ") / (" +
                    sampleModelTranslateX + ", " + sampleModelTranslateY + ")");
        }


        if (height > 1 || minY - sampleModelTranslateY > 0) {
            // buffer should contain at least one scanline
            for (int i = 0; i < data.length; i++) {
                if (scanlineStride > data[i].length) {
                    throw new RasterFormatException("Incorrect scanline stride: "
                        + scanlineStride);
                }
            }
        }

        // Make sure data for Raster is in a legal range
        for (int i=0; i < dataOffsets.length; i++) {
            if (dataOffsets[i] < 0) {
                throw new RasterFormatException("Data offsets for band "+i+
                                                "("+dataOffsets[i]+
                                                ") must be >= 0");
            }
        }

        int lastScanOffset = (height - 1) * scanlineStride;

        if ((width - 1) > (Integer.MAX_VALUE - lastScanOffset)) {
            throw new RasterFormatException("Invalid raster dimension");
        }
        int lastPixelOffset = lastScanOffset + (width-1);

        int maxIndex = 0;
        int index;

        for (int i=0; i < numDataElements; i++) {
            if (dataOffsets[i] > (Integer.MAX_VALUE - lastPixelOffset)) {
                throw new RasterFormatException("Invalid raster dimension");
            }
            index = lastPixelOffset + dataOffsets[i];
            if (index > maxIndex) {
                maxIndex = index;
            }
        }

        if (data.length == 1) {
            if (data[0].length <= maxIndex*numDataElements) {
                throw new RasterFormatException("Data array too small "+
                                                "(it is "+data[0].length+
                                                " and should be > "+
                                                (maxIndex*numDataElements)+
                                                " )");
            }
        }
        else {
            for (int i=0; i < numDataElements; i++) {
                if (data[i].length <= maxIndex) {
                    throw new RasterFormatException("Data array too small "+
                                                    "(it is "+data[i].length+
                                                    " and should be > "+
                                                    maxIndex+" )");
                }
            }
        }
    }

    public String toString() {
        return new String ("ByteBandedRaster: width = "+width+" height = "
                           + height
                           +" #bands "+numDataElements
                           +" minX = "+minX+" minY = "+minY);
    }

}
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 of the subraster. height – Height 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/ 15/ java.desktop/sun/awt/image/ByteBandedRaster.java
