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BandedSampleModel.javaAPI DocJava SE 5 API30745Fri Aug 26 14:56:52 BST 2005java.awt.image

BandedSampleModel

public final class BandedSampleModel extends ComponentSampleModel
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 efficent 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

Fields Summary
Constructors Summary
public BandedSampleModel(int dataType, int w, int h, int numBands)
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 dataType is not one of the supported data types

	super(dataType, w, h, 1, w,
              BandedSampleModel.createIndicesArray(numBands),
              BandedSampleModel.createOffsetArray(numBands));
    
public BandedSampleModel(int dataType, int w, int h, int scanlineStride, int[] bankIndices, int[] bandOffsets)
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 dataType is not one of the supported data types


	super(dataType, w, h, 1,scanlineStride, bankIndices, bandOffsets);
    
Methods Summary
public java.awt.image.SampleModelcreateCompatibleSampleModel(int w, int h)
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 BandedSampleModel
param
h the height of the resulting BandedSampleModel
return
a new BandedSampleModel with the specified width and height.
throws
IllegalArgumentException if w or h equals either Integer.MAX_VALUE or Integer.MIN_VALUE
throws
IllegalArgumentException if dataType is not one of the supported data types

        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;
    
public java.awt.image.DataBuffercreateDataBuffer()
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.

        DataBuffer dataBuffer = null;

	int size = scanlineStride * height;
        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;
    
private static int[]createIndicesArray(int numBands)

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

        int[] bandOffsets = new int[numBands];
        for (int i=0; i < numBands; i++) {
            bandOffsets[i] = 0;
        }
        return bandOffsets;
    
public java.awt.image.SampleModelcreateSubsetSampleModel(int[] bands)
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 dataType is not one of the supported data types

	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);
    
public java.lang.ObjectgetDataElements(int x, int y, java.lang.Object obj, java.awt.image.DataBuffer data)
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.

param
x, y The coordinates 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)

        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;
    
public int[]getPixel(int x, int y, int[] iArray, java.awt.image.DataBuffer data)
Returns all samples for the specified pixel in an int array. ArrayIndexOutOfBoundsException may be thrown if the coordinates are not in bounds.

param
x, y The coordinates 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)

        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;
    
public int[]getPixels(int x, int y, int w, int h, int[] iArray, java.awt.image.DataBuffer data)
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, y The coordinates 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)

        if ((x < 0) || (y < 0) || (x + w > width) || (y + h > 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;
    
public intgetSample(int x, int y, int b, java.awt.image.DataBuffer data)
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, y The coordinates 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)

        // 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;
    
public doublegetSampleDouble(int x, int y, int b, java.awt.image.DataBuffer data)
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, y The coordinates 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.

        // 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;
    
public floatgetSampleFloat(int x, int y, int b, java.awt.image.DataBuffer data)
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, y Thecoordinates 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.

        // 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;
    
public int[]getSamples(int x, int y, int w, int h, int b, int[] iArray, java.awt.image.DataBuffer data)
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, y The coordinates 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)

        // 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;
    
public inthashCode()

        return super.hashCode() ^ 0x2;
    
public voidsetDataElements(int x, int y, java.lang.Object obj, java.awt.image.DataBuffer data)
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.

param
x, y The coordinates 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)

        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;

	}
    
public voidsetPixel(int x, int y, int[] iArray, java.awt.image.DataBuffer data)
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, y The coordinates 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)

        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]);
       }
    
public voidsetPixels(int x, int y, int w, int h, int[] iArray, java.awt.image.DataBuffer data)
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, y The coordinates 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)

        if ((x < 0) || (y < 0) || (x + w > width) || (y + h > 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;
           }
        }
    
public voidsetSample(int x, int y, int b, int s, java.awt.image.DataBuffer data)
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, y The coordinates 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)

        // 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);
    
public voidsetSample(int x, int y, int b, float s, java.awt.image.DataBuffer data)
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, y The coordinates 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)

        // 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);
    
public voidsetSample(int x, int y, int b, double s, java.awt.image.DataBuffer data)
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, y The coordinates 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)

        // 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);
    
public voidsetSamples(int x, int y, int w, int h, int b, int[] iArray, java.awt.image.DataBuffer data)
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, y The coordinates 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)

        // 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;
        }