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package java.awt.image;


 This class represents image data which is stored in a pixel 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 pixel interleaved image data than is provided by ComponentSampleModel. This class stores sample data for all bands in a single 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. 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 pixel 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 pixel interleaved image data than is provided
 *  by ComponentSampleModel.  This class
 *  stores sample data for all bands in a single 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. 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 class PixelInterleavedSampleModel extends ComponentSampleModel
{
    
Constructs a PixelInterleavedSampleModel with the specified parameters.
The number of bands will be given by the length of the bandOffsets
array.

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.
  • pixelStride – The pixel stride of the image data.
  • scanlineStride – The line stride of the image data.
  • bandOffsets – The offsets of all bands.
Throws:
/**
     * Constructs a PixelInterleavedSampleModel with the specified parameters.
     * The number of bands will be given by the length of the bandOffsets
     * array.
     * @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 pixelStride The pixel stride of the image data.
     * @param scanlineStride The line stride of the image data.
     * @param bandOffsets The offsets of all bands.
     * @throws IllegalArgumentException if {@code w} or
     *         {@code h} is not greater than 0
     * @throws IllegalArgumentException if any offset between bands is
     *         greater than the scanline stride
     * @throws IllegalArgumentException if the product of
     *         {@code pixelStride} and {@code w} is greater
     *         than {@code scanlineStride}
     * @throws IllegalArgumentException if {@code pixelStride} is
     *         less than any offset between bands
     * @throws IllegalArgumentException if {@code dataType} is not
     *         one of the supported data types
     */
    public PixelInterleavedSampleModel(int dataType,
                                       int w, int h,
                                       int pixelStride,
                                       int scanlineStride,
                                       int bandOffsets[]) {
        super(dataType, w, h, pixelStride, scanlineStride, bandOffsets);
        int minBandOff=this.bandOffsets[0];
        int maxBandOff=this.bandOffsets[0];
        for (int i=1; i<this.bandOffsets.length; i++) {
            minBandOff = Math.min(minBandOff,this.bandOffsets[i]);
            maxBandOff = Math.max(maxBandOff,this.bandOffsets[i]);
        }
        maxBandOff -= minBandOff;
        if (maxBandOff > scanlineStride) {
            throw new IllegalArgumentException("Offsets between bands must be"+
                                               " less than the scanline "+
                                               " stride");
        }
        if (pixelStride*w > scanlineStride) {
            throw new IllegalArgumentException("Pixel stride times width "+
                                               "must be less than or "+
                                               "equal to the scanline "+
                                               "stride");
        }
        if (pixelStride < maxBandOff) {
            throw new IllegalArgumentException("Pixel stride must be greater"+
                                               " than or equal to the offsets"+
                                               " between bands");
        }
    }

    
Creates a new PixelInterleavedSampleModel with the specified
width and height.  The new PixelInterleavedSampleModel will have the
same number of bands, storage data type, and pixel stride
as this PixelInterleavedSampleModel.  The band offsets may be
compressed such that the minimum of all of the band offsets is zero.

Params:
  • w – the width of the resulting SampleModel
  • h – the height of the resulting SampleModel
Throws:
Returns:a new SampleModel with the specified width and height.
/**
     * Creates a new PixelInterleavedSampleModel with the specified
     * width and height.  The new PixelInterleavedSampleModel will have the
     * same number of bands, storage data type, and pixel stride
     * as this PixelInterleavedSampleModel.  The band offsets may be
     * compressed such that the minimum of all of the band offsets is zero.
     * @param w the width of the resulting {@code SampleModel}
     * @param h the height of the resulting {@code SampleModel}
     * @return a new {@code SampleModel} with the specified width
     *         and height.
     * @throws IllegalArgumentException if {@code w} or
     *         {@code h} is not greater than 0
     */
    public SampleModel createCompatibleSampleModel(int w, int h) {
        int minBandoff=bandOffsets[0];
        int numBands = bandOffsets.length;
        for (int i=1; i < numBands; i++) {
            if (bandOffsets[i] < minBandoff) {
                minBandoff = bandOffsets[i];
            }
        }
        int[] bandOff;
        if (minBandoff > 0) {
            bandOff = new int[numBands];
            for (int i=0; i < numBands; i++) {
                bandOff[i] = bandOffsets[i] - minBandoff;
            }
        }
        else {
            bandOff = bandOffsets;
        }
        return new PixelInterleavedSampleModel(dataType, w, h, pixelStride,
                                               pixelStride*w, bandOff);
    }

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

/**
     * Creates a new PixelInterleavedSampleModel with a subset of the
     * bands of this PixelInterleavedSampleModel.  The new
     * PixelInterleavedSampleModel can be used with any DataBuffer that the
     * existing PixelInterleavedSampleModel can be used with.  The new
     * PixelInterleavedSampleModel/DataBuffer combination will represent
     * an image with a subset of the bands of the original
     * PixelInterleavedSampleModel/DataBuffer combination.
     */
    public SampleModel createSubsetSampleModel(int bands[]) {
        int newBandOffsets[] = new int[bands.length];
        for (int i=0; i<bands.length; i++) {
            newBandOffsets[i] = bandOffsets[bands[i]];
        }
        return new PixelInterleavedSampleModel(this.dataType, width, height,
                                               this.pixelStride,
                                               scanlineStride, newBandOffsets);
    }

    // Differentiate hash code from other ComponentSampleModel subclasses
    public int hashCode() {
        return super.hashCode() ^ 0x1;
    }
}