Class PdfSubByteSampleModel

java.lang.Object

java.awt.image.SampleModel

org.openpdf.renderer.PdfSubByteSampleModel

public class PdfSubByteSampleModel
extends SampleModel

Provides a read-only sample-model where components are less than a byte in width while allowing for pixels to cross byte-boundaries. For example, this allows 2 pixels made of 3 4-bit-bands (p[pixel,band]) to be stored in 3 bytes as p[0,1] p[0,2] | p[0,3] p[1,0] | p[1,1] p[1,2]. MultiPixelPackedSampleModel, which allows for sub-byte components, does not allow for such byte spanning, while the PDF specification does permit it -- hence the existence of this class.

Field Summary

Fields

Modifier and Type	Field	Description
private final int	bitsPerBand
private final int	bitsPerLine
private final int	componentMask
private final int	ignoredBitsPerComponentPerByte
private final int[]	sampleSize
private final int	storageBitsPerPixel
private final int	transferBytesPerPixel

Fields inherited from class SampleModel

dataType, height, numBands, width

Constructor Summary

Constructors

Constructor	Description
PdfSubByteSampleModel(int w, int h, int numComponents, int bitsPerComponent)

Method Summary

Modifier and Type	Method	Description
SampleModel	createCompatibleSampleModel(int w, int h)
DataBuffer	createDataBuffer()
SampleModel	createSubsetSampleModel(int[] bands)
private int	getComponent(DataBuffer data, int aBitIndex)
Object	getDataElements(int x, int y, Object obj, DataBuffer data)
int	getNumDataElements()
int	getSample(int x, int y, int b, DataBuffer data)
int[]	getSampleSize()
int	getSampleSize(int band)
void	setDataElements(int x, int y, Object obj, DataBuffer data)
void	setSample(int x, int y, int b, int s, DataBuffer data)

Methods inherited from class SampleModel

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

Methods inherited from class Object

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

Field Details

transferBytesPerPixel

private final int transferBytesPerPixel

storageBitsPerPixel

private final int storageBitsPerPixel

bitsPerLine

private final int bitsPerLine

bitsPerBand

private final int bitsPerBand

componentMask

private final int componentMask

sampleSize

private final int[] sampleSize

ignoredBitsPerComponentPerByte

private final int ignoredBitsPerComponentPerByte

Constructor Details

PdfSubByteSampleModel

public PdfSubByteSampleModel(int w,
 int h,
 int numComponents,
 int bitsPerComponent)

Method Details

getNumDataElements

public int getNumDataElements()

Specified by:

getNumDataElements in class SampleModel

getDataElements

public Object getDataElements(int x,
 int y,
 Object obj,
 DataBuffer data)

Specified by:

getDataElements in class SampleModel

getComponent

private int getComponent(DataBuffer data,
 int aBitIndex)

setDataElements

public void setDataElements(int x,
 int y,
 Object obj,
 DataBuffer data)

Specified by:

setDataElements in class SampleModel

getSample

public int getSample(int x,
 int y,
 int b,
 DataBuffer data)

Specified by:

getSample in class SampleModel

setSample

public void setSample(int x,
 int y,
 int b,
 int s,
 DataBuffer data)

Specified by:

setSample in class SampleModel

createCompatibleSampleModel

public SampleModel createCompatibleSampleModel(int w,
 int h)

Specified by:

createCompatibleSampleModel in class SampleModel

createSubsetSampleModel

public SampleModel createSubsetSampleModel(int[] bands)

Specified by:

createSubsetSampleModel in class SampleModel

createDataBuffer

public DataBuffer createDataBuffer()

Specified by:

createDataBuffer in class SampleModel

getSampleSize

public int[] getSampleSize()

Specified by:

getSampleSize in class SampleModel

getSampleSize

public int getSampleSize(int band)

Specified by:

getSampleSize in class SampleModel