java.awt.image
Class PixelInterleavedSampleModel

java.lang.Object
  |
  +--java.awt.image.SampleModel
        |
        +--java.awt.image.ComponentSampleModel
              |
              +--java.awt.image.PixelInterleavedSampleModel

public class PixelInterleavedSampleModel

extends ComponentSampleModel

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 efficent 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.

Fields inherited from class java.awt.image.ComponentSampleModel

bandOffsets, bankIndices, numBands, numBanks, pixelStride, scanlineStride

Fields inherited from class java.awt.image.SampleModel

dataType, height, width

Constructor Summary

PixelInterleavedSampleModel(int dataType, int w, int h, int pixelStride, int scanlineStride, int[] bandOffsets)
Constructs a PixelInterleavedSampleModel with the specified parameters.

Method Summary

SampleModel	createCompatibleSampleModel(int w, int h) Creates a new PixelInterleavedSampleModel with the specified width and height.
SampleModel	createSubsetSampleModel(int[] bands) Creates a new PixelInterleavedSampleModel with a subset of the bands of this PixelInterleavedSampleModel.

Methods inherited from class java.awt.image.ComponentSampleModel

createDataBuffer, getBandOffsets, getBankIndices, getDataElements, getNumDataElements, getOffset, getOffset, getPixel, getPixels, getPixelStride, getSample, getSampleDouble, getSampleFloat, getSamples, getSampleSize, getSampleSize, getScanlineStride, setDataElements, setPixel, setPixels, setSample, setSample, setSample, setSamples

Methods inherited from class java.awt.image.SampleModel

getDataElements, getDataType, getHeight, getNumBands, getPixel, getPixel, getPixels, getPixels, getSamples, getSamples, getTransferType, getWidth, setDataElements, setPixel, setPixel, setPixels, setPixels, setSamples, setSamples

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PixelInterleavedSampleModel

public PixelInterleavedSampleModel(int dataType,
                                   int w,
                                   int h,
                                   int pixelStride,
                                   int scanlineStride,
                                   int[] bandOffsets)

Constructs a PixelInterleavedSampleModel with the specified parameters. The number of bands will be given by the length of the bandOffsets array.

Parameters:

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:

IllegalArgumentException - if w or h is not greater than 0

IllegalArgumentException - if any offset between bands is greater than the scanline stride

IllegalArgumentException - if the product of pixelStride and w is greater than scanlineStride

IllegalArgumentException - if pixelStride is less than any offset between bands

IllegalArgumentException - if dataType is not one of the supported data types

Method Detail

createCompatibleSampleModel

public SampleModel createCompatibleSampleModel(int w,
                                               int h)

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.

Overrides:

createCompatibleSampleModel in class ComponentSampleModel

Parameters:

w - the width of the resulting SampleModel

h - the height of the resulting SampleModel

Throws:

IllegalArgumentException - if w or h is not greater than 0

createSubsetSampleModel

public SampleModel createSubsetSampleModel(int[] bands)

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.

Overrides:

createSubsetSampleModel in class ComponentSampleModel