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 * 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
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/* ****************************************************************
 ******************************************************************
 ******************************************************************
 *** COPYRIGHT (c) Eastman Kodak Company, 1997
 *** As  an unpublished  work pursuant to Title 17 of the United
 *** States Code.  All rights reserved.
 ******************************************************************
 ******************************************************************
 ******************************************************************/

package java.awt.image;


 This class represents image data which is stored in a band interleaved fashion and for which each sample of a pixel occupies one data element of the DataBuffer. It subclasses ComponentSampleModel but provides a more efficient implementation for accessing band interleaved image data than is provided by ComponentSampleModel. This class should typically be used when working with images which store sample data for each band in a different bank of the DataBuffer. Accessor methods are provided so that image data can be manipulated directly. Pixel stride is the number of data array elements between two samples for the same band on the same scanline. The pixel stride for a BandedSampleModel is one. Scanline stride is the number of data array elements between a given sample and the corresponding sample in the same column of the next scanline. Band offsets denote the number of data array elements from the first data array element of the bank of the DataBuffer holding each band to the first sample of the band. The bands are numbered from 0 to N-1. Bank indices denote the correspondence between a bank of the data buffer and a band of image data. This class supports TYPE_BYTE, TYPE_USHORT, TYPE_SHORT, TYPE_INT, TYPE_FLOAT, and TYPE_DOUBLE datatypes 
/**
 *  This class represents image data which is stored in a band interleaved
 *  fashion and for
 *  which each sample of a pixel occupies one data element of the DataBuffer.
 *  It subclasses ComponentSampleModel but provides a more efficient
 *  implementation for accessing band interleaved image data than is provided
 *  by ComponentSampleModel.  This class should typically be used when working
 *  with images which store sample data for each band in a different bank of the
 *  DataBuffer. Accessor methods are provided so that image data can be
 *  manipulated directly. Pixel stride is the number of
 *  data array elements between two samples for the same band on the same
 *  scanline. The pixel stride for a BandedSampleModel is one.
 *  Scanline stride is the number of data array elements between
 *  a given sample and the corresponding sample in the same column of the next
 *  scanline.  Band offsets denote the number
 *  of data array elements from the first data array element of the bank
 *  of the DataBuffer holding each band to the first sample of the band.
 *  The bands are numbered from 0 to N-1.
 *  Bank indices denote the correspondence between a bank of the data buffer
 *  and a band of image data.  This class supports
 *  {@link DataBuffer#TYPE_BYTE TYPE_BYTE},
 *  {@link DataBuffer#TYPE_USHORT TYPE_USHORT},
 *  {@link DataBuffer#TYPE_SHORT TYPE_SHORT},
 *  {@link DataBuffer#TYPE_INT TYPE_INT},
 *  {@link DataBuffer#TYPE_FLOAT TYPE_FLOAT}, and
 *  {@link DataBuffer#TYPE_DOUBLE TYPE_DOUBLE} datatypes
 */


public final class BandedSampleModel extends ComponentSampleModel
{

    
Constructs a BandedSampleModel with the specified parameters.
The pixel stride will be one data element.  The scanline stride
will be the same as the width.  Each band will be stored in
a separate bank and all band offsets will be zero.

Params:
  • dataType –  The data type for storing samples.
  • w –         The width (in pixels) of the region of
                 image data described.
  • h –         The height (in pixels) of the region of image
                 data described.
  • numBands –  The number of bands for the image data.
Throws:
/**
     * Constructs a BandedSampleModel with the specified parameters.
     * The pixel stride will be one data element.  The scanline stride
     * will be the same as the width.  Each band will be stored in
     * a separate bank and all band offsets will be zero.
     * @param dataType  The data type for storing samples.
     * @param w         The width (in pixels) of the region of
     *                  image data described.
     * @param h         The height (in pixels) of the region of image
     *                  data described.
     * @param numBands  The number of bands for the image data.
     * @throws IllegalArgumentException if {@code dataType} is not
     *         one of the supported data types
     */
    public BandedSampleModel(int dataType, int w, int h, int numBands) {
        super(dataType, w, h, 1, w,
              BandedSampleModel.createIndicesArray(numBands),
              BandedSampleModel.createOffsetArray(numBands));
    }

    
Constructs a BandedSampleModel with the specified parameters.
The number of bands will be inferred from the lengths of the
bandOffsets bankIndices arrays, which must be equal.  The pixel
stride will be one data element.

Params:
  • dataType –  The data type for storing samples.
  • w –         The width (in pixels) of the region of
                 image data described.
  • h –         The height (in pixels) of the region of
                 image data described.
  • scanlineStride – The line stride of the of the image data.
  • bankIndices – The bank index for each band.
  • bandOffsets – The band offset for each band.
Throws:
/**
     * Constructs a BandedSampleModel with the specified parameters.
     * The number of bands will be inferred from the lengths of the
     * bandOffsets bankIndices arrays, which must be equal.  The pixel
     * stride will be one data element.
     * @param dataType  The data type for storing samples.
     * @param w         The width (in pixels) of the region of
     *                  image data described.
     * @param h         The height (in pixels) of the region of
     *                  image data described.
     * @param scanlineStride The line stride of the of the image data.
     * @param bankIndices The bank index for each band.
     * @param bandOffsets The band offset for each band.
     * @throws IllegalArgumentException if {@code dataType} is not
     *         one of the supported data types
     */
    public BandedSampleModel(int dataType,
                             int w, int h,
                             int scanlineStride,
                             int bankIndices[],
                             int bandOffsets[]) {

        super(dataType, w, h, 1,scanlineStride, bankIndices, bandOffsets);
    }

    
Creates a new BandedSampleModel with the specified
width and height.  The new BandedSampleModel will have the same
number of bands, storage data type, and bank indices
as this BandedSampleModel.  The band offsets will be compressed
such that the offset between bands will be w*pixelStride and
the minimum of all of the band offsets is zero.

Params:
  • w – the width of the resulting BandedSampleModel
  • h – the height of the resulting BandedSampleModel
Throws:
Returns:a new BandedSampleModel with the specified width and height.
/**
     * Creates a new BandedSampleModel with the specified
     * width and height.  The new BandedSampleModel will have the same
     * number of bands, storage data type, and bank indices
     * as this BandedSampleModel.  The band offsets will be compressed
     * such that the offset between bands will be w*pixelStride and
     * the minimum of all of the band offsets is zero.
     * @param w the width of the resulting {@code BandedSampleModel}
     * @param h the height of the resulting {@code BandedSampleModel}
     * @return a new {@code BandedSampleModel} with the specified
     *         width and height.
     * @throws IllegalArgumentException if {@code w} or
     *         {@code h} equals either
     *         {@code Integer.MAX_VALUE} or
     *         {@code Integer.MIN_VALUE}
     * @throws IllegalArgumentException if {@code dataType} is not
     *         one of the supported data types
     */
    public SampleModel createCompatibleSampleModel(int w, int h) {
        int[] bandOffs;

        if (numBanks == 1) {
            bandOffs = orderBands(bandOffsets, w*h);
        }
        else {
            bandOffs = new int[bandOffsets.length];
        }

        SampleModel sampleModel =
            new BandedSampleModel(dataType, w, h, w, bankIndices, bandOffs);
        return sampleModel;
    }

    
Creates a new BandedSampleModel with a subset of the bands of this
BandedSampleModel.  The new BandedSampleModel can be
used with any DataBuffer that the existing BandedSampleModel
can be used with.  The new BandedSampleModel/DataBuffer
combination will represent an image with a subset of the bands
of the original BandedSampleModel/DataBuffer combination.

Throws:
  • RasterFormatException – if the number of bands is greater than
                              the number of banks in this sample model.
  • IllegalArgumentException – if dataType is not one of the supported data types
/**
     * Creates a new BandedSampleModel with a subset of the bands of this
     * BandedSampleModel.  The new BandedSampleModel can be
     * used with any DataBuffer that the existing BandedSampleModel
     * can be used with.  The new BandedSampleModel/DataBuffer
     * combination will represent an image with a subset of the bands
     * of the original BandedSampleModel/DataBuffer combination.
     * @throws RasterFormatException if the number of bands is greater than
     *                               the number of banks in this sample model.
     * @throws IllegalArgumentException if {@code dataType} is not
     *         one of the supported data types
     */
    public SampleModel createSubsetSampleModel(int bands[]) {
        if (bands.length > bankIndices.length)
            throw new RasterFormatException("There are only " +
                                            bankIndices.length +
                                            " bands");
        int newBankIndices[] = new int[bands.length];
        int newBandOffsets[] = new int[bands.length];

        for (int i=0; i<bands.length; i++) {
            newBankIndices[i] = bankIndices[bands[i]];
            newBandOffsets[i] = bandOffsets[bands[i]];
        }

        return new BandedSampleModel(this.dataType, width, height,
                                     this.scanlineStride,
                                     newBankIndices, newBandOffsets);
    }

    
Creates a DataBuffer that corresponds to this BandedSampleModel,
The DataBuffer's data type, number of banks, and size
will be consistent with this BandedSampleModel.

Throws:
  • IllegalArgumentException – if dataType is not one of the supported types.
/**
     * Creates a DataBuffer that corresponds to this BandedSampleModel,
     * The DataBuffer's data type, number of banks, and size
     * will be consistent with this BandedSampleModel.
     * @throws IllegalArgumentException if {@code dataType} is not
     *         one of the supported types.
     */
    public DataBuffer createDataBuffer() {
        DataBuffer dataBuffer = null;

        // The minimum size required to store samples of one band
        int size = scanlineStride * height;

        if (numBanks == 1) {
            /*
             * The sample model contains a single bank of data buffer. Hence
             * we need to compute the size required to store samples of all
             * bands including the respective offsets.
             */
            int sizePerBand = size;
            size += bandOffsets[0];
            for (int index = 1; index < bandOffsets.length; index++) {
                size += (bandOffsets[index] - size) + sizePerBand;
            }
        } else {
            /*
             * The sample model contains multiple banks of data buffer where
             * each bank would correspond to a particular band. Hence we need
             * to compute only the additional space required for band offsets.
             */
            int maxBandOffset = bandOffsets[0];
            for (int index = 1; index < bandOffsets.length; index++) {
                maxBandOffset = Math.max(maxBandOffset, bandOffsets[index]);
            }
            size += maxBandOffset;
        }

        switch (dataType) {
        case DataBuffer.TYPE_BYTE:
            dataBuffer = new DataBufferByte(size, numBanks);
            break;
        case DataBuffer.TYPE_USHORT:
            dataBuffer = new DataBufferUShort(size, numBanks);
            break;
        case DataBuffer.TYPE_SHORT:
            dataBuffer = new DataBufferShort(size, numBanks);
            break;
        case DataBuffer.TYPE_INT:
            dataBuffer = new DataBufferInt(size, numBanks);
            break;
        case DataBuffer.TYPE_FLOAT:
            dataBuffer = new DataBufferFloat(size, numBanks);
            break;
        case DataBuffer.TYPE_DOUBLE:
            dataBuffer = new DataBufferDouble(size, numBanks);
            break;
        default:
            throw new IllegalArgumentException("dataType is not one " +
                "of the supported types.");
        }

        return dataBuffer;
    }


    
Returns data for a single pixel in a primitive array of type
TransferType.  For a BandedSampleModel, this will be the same
as the data type, and samples will be returned one per array
element.  Generally, obj
should be passed in as null, so that the Object will be created
automatically and will be of the right primitive data type.

 The following code illustrates transferring data for one pixel from DataBuffer db1, whose storage layout is described by BandedSampleModel bsm1, to DataBuffer db2, whose storage layout is described by BandedSampleModel bsm2. The transfer will generally be more efficient than using getPixel/setPixel. 
      BandedSampleModel bsm1, bsm2;
      DataBufferInt db1, db2;
      bsm2.setDataElements(x, y, bsm1.getDataElements(x, y, null, db1),
                           db2);


Using getDataElements/setDataElements to transfer between two
DataBuffer/SampleModel pairs is legitimate if the SampleModels have
the same number of bands, corresponding bands have the same number of
bits per sample, and the TransferTypes are the same.


If obj is non-null, it should be a primitive array of type TransferType.
Otherwise, a ClassCastException is thrown.  An
ArrayIndexOutOfBoundsException may be thrown if the coordinates are
not in bounds, or if obj is non-null and is not large enough to hold
the pixel data.

Params:
  • x –         The X coordinate of the pixel location
  • y –         The Y coordinate of the pixel location
  • obj –       If non-null, a primitive array in which to return
                 the pixel data.
  • data –      The DataBuffer containing the image data.
See Also:
Returns:the data for the specified pixel.
/**
     * Returns data for a single pixel in a primitive array of type
     * TransferType.  For a BandedSampleModel, this will be the same
     * as the data type, and samples will be returned one per array
     * element.  Generally, obj
     * should be passed in as null, so that the Object will be created
     * automatically and will be of the right primitive data type.
     * <p>
     * The following code illustrates transferring data for one pixel from
     * DataBuffer {@code db1}, whose storage layout is described by
     * BandedSampleModel {@code bsm1}, to DataBuffer {@code db2},
     * whose storage layout is described by
     * BandedSampleModel {@code bsm2}.
     * The transfer will generally be more efficient than using
     * getPixel/setPixel.
     * <pre>
     *       BandedSampleModel bsm1, bsm2;
     *       DataBufferInt db1, db2;
     *       bsm2.setDataElements(x, y, bsm1.getDataElements(x, y, null, db1),
     *                            db2);
     * </pre>
     * Using getDataElements/setDataElements to transfer between two
     * DataBuffer/SampleModel pairs is legitimate if the SampleModels have
     * the same number of bands, corresponding bands have the same number of
     * bits per sample, and the TransferTypes are the same.
     * <p>
     * If obj is non-null, it should be a primitive array of type TransferType.
     * Otherwise, a ClassCastException is thrown.  An
     * ArrayIndexOutOfBoundsException may be thrown if the coordinates are
     * not in bounds, or if obj is non-null and is not large enough to hold
     * the pixel data.
     * @param x         The X coordinate of the pixel location
     * @param y         The Y coordinate of the pixel location
     * @param obj       If non-null, a primitive array in which to return
     *                  the pixel data.
     * @param data      The DataBuffer containing the image data.
     * @return the data for the specified pixel.
     * @see #setDataElements(int, int, Object, DataBuffer)
     */
    public Object getDataElements(int x, int y, Object obj, DataBuffer data) {
        if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }
        int type = getTransferType();
        int numDataElems = getNumDataElements();
        int pixelOffset = y*scanlineStride + x;

        switch(type) {

        case DataBuffer.TYPE_BYTE:

            byte[] bdata;

            if (obj == null) {
                bdata = new byte[numDataElems];
            } else {
                bdata = (byte[])obj;
            }

            for (int i=0; i<numDataElems; i++) {
                bdata[i] = (byte)data.getElem(bankIndices[i],
                                              pixelOffset + bandOffsets[i]);
            }

            obj = (Object)bdata;
            break;

        case DataBuffer.TYPE_USHORT:
        case DataBuffer.TYPE_SHORT:

            short[] sdata;

            if (obj == null) {
                sdata = new short[numDataElems];
            } else {
                sdata = (short[])obj;
            }

            for (int i=0; i<numDataElems; i++) {
                sdata[i] = (short)data.getElem(bankIndices[i],
                                               pixelOffset + bandOffsets[i]);
            }

            obj = (Object)sdata;
            break;

        case DataBuffer.TYPE_INT:

            int[] idata;

            if (obj == null) {
                idata = new int[numDataElems];
            } else {
                idata = (int[])obj;
            }

            for (int i=0; i<numDataElems; i++) {
                idata[i] = data.getElem(bankIndices[i],
                                        pixelOffset + bandOffsets[i]);
            }

            obj = (Object)idata;
            break;

        case DataBuffer.TYPE_FLOAT:

            float[] fdata;

            if (obj == null) {
                fdata = new float[numDataElems];
            } else {
                fdata = (float[])obj;
            }

            for (int i=0; i<numDataElems; i++) {
                fdata[i] = data.getElemFloat(bankIndices[i],
                                             pixelOffset + bandOffsets[i]);
            }

            obj = (Object)fdata;
            break;

        case DataBuffer.TYPE_DOUBLE:

            double[] ddata;

            if (obj == null) {
                ddata = new double[numDataElems];
            } else {
                ddata = (double[])obj;
            }

            for (int i=0; i<numDataElems; i++) {
                ddata[i] = data.getElemDouble(bankIndices[i],
                                              pixelOffset + bandOffsets[i]);
            }

            obj = (Object)ddata;
            break;
        }

        return obj;
    }

    
Returns all samples for the specified pixel in an int array.
ArrayIndexOutOfBoundsException may be thrown if the coordinates are
not in bounds.

Params:
  • x –         The X coordinate of the pixel location
  • y –         The Y coordinate of the pixel location
  • iArray –    If non-null, returns the samples in this array
  • data –      The DataBuffer containing the image data
See Also:
Returns:the samples for the specified pixel.
/**
     * Returns all samples for the specified pixel in an int array.
     * ArrayIndexOutOfBoundsException may be thrown if the coordinates are
     * not in bounds.
     * @param x         The X coordinate of the pixel location
     * @param y         The Y coordinate of the pixel location
     * @param iArray    If non-null, returns the samples in this array
     * @param data      The DataBuffer containing the image data
     * @return the samples for the specified pixel.
     * @see #setPixel(int, int, int[], DataBuffer)
     */
    public int[] getPixel(int x, int y, int iArray[], DataBuffer data) {
        if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }

        int[] pixels;

        if (iArray != null) {
           pixels = iArray;
        } else {
           pixels = new int [numBands];
        }

        int pixelOffset = y*scanlineStride + x;
        for (int i=0; i<numBands; i++) {
            pixels[i] = data.getElem(bankIndices[i],
                                     pixelOffset + bandOffsets[i]);
        }
        return pixels;
    }

    
Returns all samples for the specified rectangle of pixels in
an int array, one sample per data array element.
ArrayIndexOutOfBoundsException may be thrown if the coordinates are
not in bounds.

Params:
  • x –         The X coordinate of the upper left pixel location
  • y –         The Y coordinate of the upper left pixel location
  • w –         The width of the pixel rectangle
  • h –         The height of the pixel rectangle
  • iArray –    If non-null, returns the samples in this array
  • data –      The DataBuffer containing the image data
See Also:
Returns:the samples for the pixels within the specified region.
/**
     * Returns all samples for the specified rectangle of pixels in
     * an int array, one sample per data array element.
     * ArrayIndexOutOfBoundsException may be thrown if the coordinates are
     * not in bounds.
     * @param x         The X coordinate of the upper left pixel location
     * @param y         The Y coordinate of the upper left pixel location
     * @param w         The width of the pixel rectangle
     * @param h         The height of the pixel rectangle
     * @param iArray    If non-null, returns the samples in this array
     * @param data      The DataBuffer containing the image data
     * @return the samples for the pixels within the specified region.
     * @see #setPixels(int, int, int, int, int[], DataBuffer)
     */
    public int[] getPixels(int x, int y, int w, int h,
                           int iArray[], DataBuffer data) {
        int x1 = x + w;
        int y1 = y + h;

        if (x < 0 || x >= width || w > width || x1 < 0 || x1 > width ||
            y < 0 || y >= height || h > height || y1 < 0 || y1 >  height)
        {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }
        int[] pixels;

        if (iArray != null) {
           pixels = iArray;
        } else {
           pixels = new int[w*h*numBands];
        }

        for (int k = 0; k < numBands; k++) {
            int lineOffset = y*scanlineStride + x + bandOffsets[k];
            int srcOffset = k;
            int bank = bankIndices[k];

            for (int i = 0; i < h; i++) {
                int pixelOffset = lineOffset;
                for (int j = 0; j < w; j++) {
                    pixels[srcOffset] = data.getElem(bank, pixelOffset++);
                    srcOffset += numBands;
                }
                lineOffset += scanlineStride;
            }
        }
        return pixels;
    }

    
Returns as int the sample in a specified band for the pixel
located at (x,y).
ArrayIndexOutOfBoundsException may be thrown if the coordinates are
not in bounds.

Params:
  • x –         The X coordinate of the pixel location
  • y –         The Y coordinate of the pixel location
  • b –         The band to return
  • data –      The DataBuffer containing the image data
See Also:
Returns:the sample in the specified band for the specified pixel.
/**
     * Returns as int the sample in a specified band for the pixel
     * located at (x,y).
     * ArrayIndexOutOfBoundsException may be thrown if the coordinates are
     * not in bounds.
     * @param x         The X coordinate of the pixel location
     * @param y         The Y coordinate of the pixel location
     * @param b         The band to return
     * @param data      The DataBuffer containing the image data
     * @return the sample in the specified band for the specified pixel.
     * @see #setSample(int, int, int, int, DataBuffer)
     */
    public int getSample(int x, int y, int b, DataBuffer data) {
        // Bounds check for 'b' will be performed automatically
        if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }
        int sample =
            data.getElem(bankIndices[b],
                         y*scanlineStride + x + bandOffsets[b]);
        return sample;
    }

    
Returns the sample in a specified band
for the pixel located at (x,y) as a float.
ArrayIndexOutOfBoundsException may be thrown if the coordinates are
not in bounds.

Params:
  • x –         The X coordinate of the pixel location
  • y –         The Y coordinate of the pixel location
  • b –         The band to return
  • data –      The DataBuffer containing the image data
Returns:a float value that represents the sample in the specified
band for the specified pixel.
/**
     * Returns the sample in a specified band
     * for the pixel located at (x,y) as a float.
     * ArrayIndexOutOfBoundsException may be thrown if the coordinates are
     * not in bounds.
     * @param x         The X coordinate of the pixel location
     * @param y         The Y coordinate of the pixel location
     * @param b         The band to return
     * @param data      The DataBuffer containing the image data
     * @return a float value that represents the sample in the specified
     * band for the specified pixel.
     */
    public float getSampleFloat(int x, int y, int b, DataBuffer data) {
        // Bounds check for 'b' will be performed automatically
        if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }

        float sample = data.getElemFloat(bankIndices[b],
                                    y*scanlineStride + x + bandOffsets[b]);
        return sample;
    }

    
Returns the sample in a specified band
for a pixel located at (x,y) as a double.
ArrayIndexOutOfBoundsException may be thrown if the coordinates are
not in bounds.

Params:
  • x –         The X coordinate of the pixel location
  • y –         The Y coordinate of the pixel location
  • b –         The band to return
  • data –      The DataBuffer containing the image data
Returns:a double value that represents the sample in the specified
band for the specified pixel.
/**
     * Returns the sample in a specified band
     * for a pixel located at (x,y) as a double.
     * ArrayIndexOutOfBoundsException may be thrown if the coordinates are
     * not in bounds.
     * @param x         The X coordinate of the pixel location
     * @param y         The Y coordinate of the pixel location
     * @param b         The band to return
     * @param data      The DataBuffer containing the image data
     * @return a double value that represents the sample in the specified
     * band for the specified pixel.
     */
    public double getSampleDouble(int x, int y, int b, DataBuffer data) {
        // Bounds check for 'b' will be performed automatically
        if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }

        double sample = data.getElemDouble(bankIndices[b],
                                       y*scanlineStride + x + bandOffsets[b]);
        return sample;
    }

    
Returns the samples in a specified band for the specified rectangle
of pixels in an int array, one sample per data array element.
ArrayIndexOutOfBoundsException may be thrown if the coordinates are
not in bounds.

Params:
  • x –         The X coordinate of the upper left pixel location
  • y –         The Y coordinate of the upper left pixel location
  • w –         The width of the pixel rectangle
  • h –         The height of the pixel rectangle
  • b –         The band to return
  • iArray –    If non-null, returns the samples in this array
  • data –      The DataBuffer containing the image data
See Also:
Returns:the samples in the specified band for the pixels within
the specified region.
/**
     * Returns the samples in a specified band for the specified rectangle
     * of pixels in an int array, one sample per data array element.
     * ArrayIndexOutOfBoundsException may be thrown if the coordinates are
     * not in bounds.
     * @param x         The X coordinate of the upper left pixel location
     * @param y         The Y coordinate of the upper left pixel location
     * @param w         The width of the pixel rectangle
     * @param h         The height of the pixel rectangle
     * @param b         The band to return
     * @param iArray    If non-null, returns the samples in this array
     * @param data      The DataBuffer containing the image data
     * @return the samples in the specified band for the pixels within
     * the specified region.
     * @see #setSamples(int, int, int, int, int, int[], DataBuffer)
     */
    public int[] getSamples(int x, int y, int w, int h, int b,
                            int iArray[], DataBuffer data) {
        // Bounds check for 'b' will be performed automatically
        if ((x < 0) || (y < 0) || (x + w > width) || (y + h > height)) {
            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 + bandOffsets[b];
        int srcOffset = 0;
        int bank = bankIndices[b];

        for (int i = 0; i < h; i++) {
           int sampleOffset = lineOffset;
           for (int j = 0; j < w; j++) {
               samples[srcOffset++] = data.getElem(bank, sampleOffset++);
           }
           lineOffset += scanlineStride;
        }
        return samples;
    }

    
Sets the data for a single pixel in the specified DataBuffer from a
primitive array of type TransferType.  For a BandedSampleModel,
this will be the same as the data type, and samples are transferred
one per array element.

 The following code illustrates transferring data for one pixel from DataBuffer db1, whose storage layout is described by BandedSampleModel bsm1, to DataBuffer db2, whose storage layout is described by BandedSampleModel bsm2. The transfer will generally be more efficient than using getPixel/setPixel. 
      BandedSampleModel bsm1, bsm2;
      DataBufferInt db1, db2;
      bsm2.setDataElements(x, y, bsm1.getDataElements(x, y, null, db1),
                           db2);


Using getDataElements/setDataElements to transfer between two
DataBuffer/SampleModel pairs is legitimate if the SampleModels have
the same number of bands, corresponding bands have the same number of
bits per sample, and the TransferTypes are the same.


obj must be a primitive array of type TransferType.  Otherwise,
a ClassCastException is thrown.  An
ArrayIndexOutOfBoundsException may be thrown if the coordinates are
not in bounds, or if obj is not large enough to hold the pixel data.

Params:
  • x –         The X coordinate of the pixel location
  • y –         The Y coordinate of the pixel location
  • obj –       If non-null, returns the primitive array in this
                 object
  • data –      The DataBuffer containing the image data
See Also:
/**
     * Sets the data for a single pixel in the specified DataBuffer from a
     * primitive array of type TransferType.  For a BandedSampleModel,
     * this will be the same as the data type, and samples are transferred
     * one per array element.
     * <p>
     * The following code illustrates transferring data for one pixel from
     * DataBuffer {@code db1}, whose storage layout is described by
     * BandedSampleModel {@code bsm1}, to DataBuffer {@code db2},
     * whose storage layout is described by
     * BandedSampleModel {@code bsm2}.
     * The transfer will generally be more efficient than using
     * getPixel/setPixel.
     * <pre>
     *       BandedSampleModel bsm1, bsm2;
     *       DataBufferInt db1, db2;
     *       bsm2.setDataElements(x, y, bsm1.getDataElements(x, y, null, db1),
     *                            db2);
     * </pre>
     * Using getDataElements/setDataElements to transfer between two
     * DataBuffer/SampleModel pairs is legitimate if the SampleModels have
     * the same number of bands, corresponding bands have the same number of
     * bits per sample, and the TransferTypes are the same.
     * <p>
     * obj must be a primitive array of type TransferType.  Otherwise,
     * a ClassCastException is thrown.  An
     * ArrayIndexOutOfBoundsException may be thrown if the coordinates are
     * not in bounds, or if obj is not large enough to hold the pixel data.
     * @param x         The X coordinate of the pixel location
     * @param y         The Y coordinate of the pixel location
     * @param obj       If non-null, returns the primitive array in this
     *                  object
     * @param data      The DataBuffer containing the image data
     * @see #getDataElements(int, int, Object, DataBuffer)
     */
    public void setDataElements(int x, int y, Object obj, DataBuffer data) {
        if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }
        int type = getTransferType();
        int numDataElems = getNumDataElements();
        int pixelOffset = y*scanlineStride + x;

        switch(type) {

        case DataBuffer.TYPE_BYTE:

            byte[] barray = (byte[])obj;

            for (int i=0; i<numDataElems; i++) {
                data.setElem(bankIndices[i], pixelOffset + bandOffsets[i],
                             barray[i] & 0xff);
            }
            break;

        case DataBuffer.TYPE_USHORT:
        case DataBuffer.TYPE_SHORT:

            short[] sarray = (short[])obj;

            for (int i=0; i<numDataElems; i++) {
                data.setElem(bankIndices[i], pixelOffset + bandOffsets[i],
                             sarray[i] & 0xffff);
            }
            break;

        case DataBuffer.TYPE_INT:

            int[] iarray = (int[])obj;

            for (int i=0; i<numDataElems; i++) {
                data.setElem(bankIndices[i], pixelOffset + bandOffsets[i],
                             iarray[i]);
            }
            break;

        case DataBuffer.TYPE_FLOAT:

            float[] farray = (float[])obj;

            for (int i=0; i<numDataElems; i++) {
                data.setElemFloat(bankIndices[i], pixelOffset + bandOffsets[i],
                                  farray[i]);
            }
            break;

        case DataBuffer.TYPE_DOUBLE:

            double[] darray = (double[])obj;

            for (int i=0; i<numDataElems; i++) {
                data.setElemDouble(bankIndices[i], pixelOffset + bandOffsets[i],
                                   darray[i]);
            }
            break;

        }
    }

    
Sets a pixel in the DataBuffer using an int array of samples for input.
ArrayIndexOutOfBoundsException may be thrown if the coordinates are
not in bounds.

Params:
  • x –         The X coordinate of the pixel location
  • y –         The Y coordinate of the pixel location
  • iArray –    The input samples in an int array
  • data –      The DataBuffer containing the image data
See Also:
/**
     * Sets a pixel in the DataBuffer using an int array of samples for input.
     * ArrayIndexOutOfBoundsException may be thrown if the coordinates are
     * not in bounds.
     * @param x         The X coordinate of the pixel location
     * @param y         The Y coordinate of the pixel location
     * @param iArray    The input samples in an int array
     * @param data      The DataBuffer containing the image data
     * @see #getPixel(int, int, int[], DataBuffer)
     */
    public void setPixel(int x, int y, int iArray[], DataBuffer data) {
        if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }
       int pixelOffset = y*scanlineStride + x;
       for (int i=0; i<numBands; i++) {
           data.setElem(bankIndices[i], pixelOffset + bandOffsets[i],
                        iArray[i]);
       }
    }

    
Sets all samples for a rectangle of pixels from an int array containing
one sample per array element.
ArrayIndexOutOfBoundsException may be thrown if the coordinates are
not in bounds.

Params:
  • x –         The X coordinate of the upper left pixel location
  • y –         The Y coordinate of the upper left pixel location
  • w –         The width of the pixel rectangle
  • h –         The height of the pixel rectangle
  • iArray –    The input samples in an int array
  • data –      The DataBuffer containing the image data
See Also:
/**
     * Sets all samples for a rectangle of pixels from an int array containing
     * one sample per array element.
     * ArrayIndexOutOfBoundsException may be thrown if the coordinates are
     * not in bounds.
     * @param x         The X coordinate of the upper left pixel location
     * @param y         The Y coordinate of the upper left pixel location
     * @param w         The width of the pixel rectangle
     * @param h         The height of the pixel rectangle
     * @param iArray    The input samples in an int array
     * @param data      The DataBuffer containing the image data
     * @see #getPixels(int, int, int, int, int[], DataBuffer)
     */
    public void setPixels(int x, int y, int w, int h,
                          int iArray[], DataBuffer data) {
        int x1 = x + w;
        int y1 = y + h;

        if (x < 0 || x >= width || w > width || x1 < 0 || x1 > width ||
            y < 0 || y >= height || h > height || y1 < 0 || y1 >  height)
        {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }

        for (int k = 0; k < numBands; k++) {
            int lineOffset = y*scanlineStride + x + bandOffsets[k];
            int srcOffset = k;
            int bank = bankIndices[k];

            for (int i = 0; i < h; i++) {
                int pixelOffset = lineOffset;
                for (int j = 0; j < w; j++) {
                    data.setElem(bank, pixelOffset++, iArray[srcOffset]);
                    srcOffset += numBands;
                }
                lineOffset += scanlineStride;
           }
        }
    }

    
Sets a sample in the specified band for the pixel located at (x,y)
in the DataBuffer using an int for input.
ArrayIndexOutOfBoundsException may be thrown if the coordinates are
not in bounds.

Params:
  • x –         The X coordinate of the pixel location
  • y –         The Y coordinate of the pixel location
  • b –         The band to set
  • s –         The input sample as an int
  • data –      The DataBuffer containing the image data
See Also:
/**
     * Sets a sample in the specified band for the pixel located at (x,y)
     * in the DataBuffer using an int for input.
     * ArrayIndexOutOfBoundsException may be thrown if the coordinates are
     * not in bounds.
     * @param x         The X coordinate of the pixel location
     * @param y         The Y coordinate of the pixel location
     * @param b         The band to set
     * @param s         The input sample as an int
     * @param data      The DataBuffer containing the image data
     * @see #getSample(int, int, int, DataBuffer)
     */
    public void setSample(int x, int y, int b, int s,
                          DataBuffer data) {
        // Bounds check for 'b' will be performed automatically
        if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }
        data.setElem(bankIndices[b],
                     y*scanlineStride + x + bandOffsets[b], s);
    }

    
Sets a sample in the specified band for the pixel located at (x,y)
in the DataBuffer using a float for input.
ArrayIndexOutOfBoundsException may be thrown if the coordinates are
not in bounds.

Params:
  • x –         The X coordinate of the pixel location
  • y –         The Y coordinate of the pixel location
  • b –         The band to set
  • s –         The input sample as a float
  • data –      The DataBuffer containing the image data
See Also:
/**
     * Sets a sample in the specified band for the pixel located at (x,y)
     * in the DataBuffer using a float for input.
     * ArrayIndexOutOfBoundsException may be thrown if the coordinates are
     * not in bounds.
     * @param x         The X coordinate of the pixel location
     * @param y         The Y coordinate of the pixel location
     * @param b         The band to set
     * @param s         The input sample as a float
     * @param data      The DataBuffer containing the image data
     * @see #getSample(int, int, int, DataBuffer)
     */
    public void setSample(int x, int y, int b,
                          float s ,
                          DataBuffer data) {
        // Bounds check for 'b' will be performed automatically
        if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }
        data.setElemFloat(bankIndices[b],
                          y*scanlineStride + x + bandOffsets[b], s);
    }

    
Sets a sample in the specified band for the pixel located at (x,y)
in the DataBuffer using a double for input.
ArrayIndexOutOfBoundsException may be thrown if the coordinates are
not in bounds.

Params:
  • x –         The X coordinate of the pixel location
  • y –         The Y coordinate of the pixel location
  • b –         The band to set
  • s –         The input sample as a double
  • data –      The DataBuffer containing the image data
See Also:
/**
     * Sets a sample in the specified band for the pixel located at (x,y)
     * in the DataBuffer using a double for input.
     * ArrayIndexOutOfBoundsException may be thrown if the coordinates are
     * not in bounds.
     * @param x         The X coordinate of the pixel location
     * @param y         The Y coordinate of the pixel location
     * @param b         The band to set
     * @param s         The input sample as a double
     * @param data      The DataBuffer containing the image data
     * @see #getSample(int, int, int, DataBuffer)
     */
    public void setSample(int x, int y, int b,
                          double s,
                          DataBuffer data) {
        // Bounds check for 'b' will be performed automatically
        if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }
        data.setElemDouble(bankIndices[b],
                          y*scanlineStride + x + bandOffsets[b], s);
    }

    
Sets the samples in the specified band for the specified rectangle
of pixels from an int array containing one sample per data array element.
ArrayIndexOutOfBoundsException may be thrown if the coordinates are
not in bounds.

Params:
  • x –         The X coordinate of the upper left pixel location
  • y –         The Y coordinate of the upper left pixel location
  • w –         The width of the pixel rectangle
  • h –         The height of the pixel rectangle
  • b –         The band to set
  • iArray –    The input sample array
  • data –      The DataBuffer containing the image data
See Also:
/**
     * Sets the samples in the specified band for the specified rectangle
     * of pixels from an int array containing one sample per data array element.
     * ArrayIndexOutOfBoundsException may be thrown if the coordinates are
     * not in bounds.
     * @param x         The X coordinate of the upper left pixel location
     * @param y         The Y coordinate of the upper left pixel location
     * @param w         The width of the pixel rectangle
     * @param h         The height of the pixel rectangle
     * @param b         The band to set
     * @param iArray    The input sample array
     * @param data      The DataBuffer containing the image data
     * @see #getSamples(int, int, int, int, int, int[], DataBuffer)
     */
    public void setSamples(int x, int y, int w, int h, int b,
                           int iArray[], DataBuffer data) {
        // Bounds check for 'b' will be performed automatically
        if ((x < 0) || (y < 0) || (x + w > width) || (y + h > height)) {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }
        int lineOffset = y*scanlineStride + x + bandOffsets[b];
        int srcOffset = 0;
        int bank = bankIndices[b];

        for (int i = 0; i < h; i++) {
           int sampleOffset = lineOffset;
           for (int j = 0; j < w; j++) {
              data.setElem(bank, sampleOffset++, iArray[srcOffset++]);
           }
           lineOffset += scanlineStride;
        }
    }

    private static int[] createOffsetArray(int numBands) {
        int[] bandOffsets = new int[numBands];
        for (int i=0; i < numBands; i++) {
            bandOffsets[i] = 0;
        }
        return bandOffsets;
    }

    private static int[] createIndicesArray(int numBands) {
        int[] bankIndices = new int[numBands];
        for (int i=0; i < numBands; i++) {
            bankIndices[i] = i;
        }
        return bankIndices;
    }

    // Differentiate hash code from other ComponentSampleModel subclasses
    public int hashCode() {
        return super.hashCode() ^ 0x2;
    }
}