com.sun.media.imageioimpl.plugins.jpeg2000

Class J2KImageReader

java.lang.Object

javax.imageio.ImageReader

com.sun.media.imageioimpl.plugins.jpeg2000.J2KImageReader

All Implemented Interfaces:

MsgLogger

public class J2KImageReader
extends ImageReader
implements MsgLogger

This class is the Java Image IO plugin reader for JPEG 2000 JP2 image file format. It has the capability to load the compressed bilevel images, color-indexed byte images, or multi-band images in byte/ushort/short/int data type. It may subsample the image, select bands, clip the image, and shift the decoded image origin if the proper decoding parameter are set in the provided J2KImageReadParam.

Field Summary

Fields

Modifier and Type	Field and Description
private boolean	gotHeader Indicates whether the header is read.
private HeaderDecoder	hd The J2K HeaderDecoder defined in jj2000 packages.
private int	height The image height.
private ImageInputStream	iis The input stream where reads from
private J2KMetadata	imageMetadata Image metadata, valid for the imageMetadataIndex only.
private int	imageMetadataIndex The image index for the cached metadata.
private boolean	logJJ2000Msg Whether to log JJ2000 messages.
private J2KReadState	readState The J2KReadState for this reading session based on the current input and J2KImageReadParam.
private long	streamPosition0 Stream position when setInput() was called.
private int	width The image width.

Fields inherited from class javax.imageio.ImageReader

availableLocales, ignoreMetadata, input, locale, minIndex, originatingProvider, progressListeners, seekForwardOnly, updateListeners, warningListeners, warningLocales

Fields inherited from interface jj2000.j2k.util.MsgLogger

ERROR, INFO, LOG, WARNING

Constructor Summary

Constructors

Constructor and Description
J2KImageReader(ImageReaderSpi originator) Constructs J2KImageReader from the provided ImageReaderSpi.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	canReadRaster()
private void	checkIndex(int imageIndex)
static void	checkReadParamBandSettingsWrapper(ImageReadParam param, int numSrcBands, int numDstBands) Wrapper for the protected method checkReadParamBandSettings.
static void	computeRegionsWrapper(ImageReadParam param, boolean allowZeroDestOffset, int srcWidth, int srcHeight, BufferedImage image, Rectangle srcRegion, Rectangle destRegion) Wrapper for the protected method computeRegions.
void	dispose()
void	flush() Writes any buffered data from the println() method to the device.
boolean	getAbortRequest() This method wraps the protected method abortRequested to allow the abortions be monitored by J2KReadState.
ImageReadParam	getDefaultReadParam()
int	getHeight(int imageIndex)
IIOMetadata	getImageMetadata(int imageIndex)
private ImageTypeSpecifier	getImageType(int imageIndex)
Iterator	getImageTypes(int imageIndex)
int	getNumImages(boolean allowSearch) Overrides the method defined in the superclass.
(package private) static Rectangle	getReducedRect(Rectangle r, int maxLevel, int level, int subX, int subY) Convert a rectangle provided in the coordinate system of the JPEG2000 reference grid to coordinates at a lower resolution level where zero denotes the lowest resolution level.
IIOMetadata	getStreamMetadata()
int	getTileGridXOffset(int imageIndex)
int	getTileGridYOffset(int imageIndex)
int	getTileHeight(int imageIndex)
int	getTileWidth(int imageIndex)
int	getWidth(int imageIndex)
boolean	isImageTiled(int imageIndex)
boolean	isRandomAccessEasy(int imageIndex)
void	println(String str, int flind, int ind) Prints the string 'str' to the output device, appending a line return.
void	printmsg(int sev, String msg) Prints the message 'msg' to the output device, appending a newline, with severity 'sev'.
void	processImageProgressWrapper(float percentageDone) Wrapper for the protected method processImageProgress So it can be access from the classes which are not in ImageReader hierarchy.
void	processImageUpdateWrapper(BufferedImage theImage, int minX, int minY, int width, int height, int periodX, int periodY, int[] bands) Wrapper for the protected method processImageUpdate So it can be access from the classes which are not in ImageReader hierarchy.
BufferedImage	read(int imageIndex, ImageReadParam param)
RenderedImage	readAsRenderedImage(int imageIndex, ImageReadParam param)
void	readHeader()
Raster	readRaster(int imageIndex, ImageReadParam param)
void	reset()
void	setInput(Object input, boolean seekForwardOnly, boolean ignoreMetadata) Overrides the method defined in the superclass.

Methods inherited from class javax.imageio.ImageReader

abort, abortRequested, addIIOReadProgressListener, addIIOReadUpdateListener, addIIOReadWarningListener, checkReadParamBandSettings, clearAbortRequest, computeRegions, getAspectRatio, getAvailableLocales, getDestination, getFormatName, getImageMetadata, getInput, getLocale, getMinIndex, getNumThumbnails, getOriginatingProvider, getRawImageType, getSourceRegion, getStreamMetadata, getThumbnailHeight, getThumbnailWidth, hasThumbnails, isIgnoringMetadata, isSeekForwardOnly, processImageComplete, processImageProgress, processImageStarted, processImageUpdate, processPassComplete, processPassStarted, processReadAborted, processSequenceComplete, processSequenceStarted, processThumbnailComplete, processThumbnailPassComplete, processThumbnailPassStarted, processThumbnailProgress, processThumbnailStarted, processThumbnailUpdate, processWarningOccurred, processWarningOccurred, read, readAll, readAll, readerSupportsThumbnails, readThumbnail, readTile, readTileRaster, removeAllIIOReadProgressListeners, removeAllIIOReadUpdateListeners, removeAllIIOReadWarningListeners, removeIIOReadProgressListener, removeIIOReadUpdateListener, removeIIOReadWarningListener, setInput, setInput, setLocale

Methods inherited from class java.lang.Object

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

Field Detail

iis

private ImageInputStream iis

The input stream where reads from

streamPosition0

private long streamPosition0

Stream position when setInput() was called.

gotHeader

private boolean gotHeader

Indicates whether the header is read.

width

private int width

The image width.

height

private int height

The image height.

imageMetadata

private J2KMetadata imageMetadata

Image metadata, valid for the imageMetadataIndex only.

imageMetadataIndex

private int imageMetadataIndex

The image index for the cached metadata.

hd

private HeaderDecoder hd

The J2K HeaderDecoder defined in jj2000 packages. Used to extract image header information.

readState

private J2KReadState readState

The J2KReadState for this reading session based on the current input and J2KImageReadParam.

logJJ2000Msg

private boolean logJJ2000Msg

Whether to log JJ2000 messages.

Constructor Detail

J2KImageReader

public J2KImageReader(ImageReaderSpi originator)

Constructs J2KImageReader from the provided ImageReaderSpi.

Method Detail

computeRegionsWrapper

public static void computeRegionsWrapper(ImageReadParam param,
                         boolean allowZeroDestOffset,
                         int srcWidth,
                         int srcHeight,
                         BufferedImage image,
                         Rectangle srcRegion,
                         Rectangle destRegion)

Wrapper for the protected method computeRegions. So it can be access from the classes which are not in ImageReader hierarchy.

checkReadParamBandSettingsWrapper

public static void checkReadParamBandSettingsWrapper(ImageReadParam param,
                                     int numSrcBands,
                                     int numDstBands)

Wrapper for the protected method checkReadParamBandSettings. So it can be access from the classes which are not in ImageReader hierarchy.

getReducedRect

static Rectangle getReducedRect(Rectangle r,
                       int maxLevel,
                       int level,
                       int subX,
                       int subY)

Convert a rectangle provided in the coordinate system of the JPEG2000 reference grid to coordinates at a lower resolution level where zero denotes the lowest resolution level.

Parameters:

r - A rectangle in references grid coordinates.

maxLevel - The highest resolution level in the image.

level - The resolution level of the returned rectangle.

subX - The horizontal subsampling step size.

subY - The vertical subsampling step size.

Returns:

The parameter rectangle converted to a lower resolution level.

Throws:

IllegalArgumentException - if r is null, maxLevel or level is negative, or level is greater than maxLevel.

processImageUpdateWrapper

public void processImageUpdateWrapper(BufferedImage theImage,
                             int minX,
                             int minY,
                             int width,
                             int height,
                             int periodX,
                             int periodY,
                             int[] bands)

Wrapper for the protected method processImageUpdate So it can be access from the classes which are not in ImageReader hierarchy.

processImageProgressWrapper

public void processImageProgressWrapper(float percentageDone)

Wrapper for the protected method processImageProgress So it can be access from the classes which are not in ImageReader hierarchy.

setInput

public void setInput(Object input,
            boolean seekForwardOnly,
            boolean ignoreMetadata)

Overrides the method defined in the superclass.

Overrides:

setInput in class ImageReader

getNumImages

public int getNumImages(boolean allowSearch)
                 throws IOException

Overrides the method defined in the superclass.

Specified by:

getNumImages in class ImageReader

Throws:

IOException

getWidth

public int getWidth(int imageIndex)
             throws IOException

Specified by:

getWidth in class ImageReader

Throws:

IOException

getHeight

public int getHeight(int imageIndex)
              throws IOException

Specified by:

getHeight in class ImageReader

Throws:

IOException

getTileGridXOffset

public int getTileGridXOffset(int imageIndex)
                       throws IOException

Overrides:

getTileGridXOffset in class ImageReader

Throws:

IOException

getTileGridYOffset

public int getTileGridYOffset(int imageIndex)
                       throws IOException

Overrides:

getTileGridYOffset in class ImageReader

Throws:

IOException

getTileWidth

public int getTileWidth(int imageIndex)
                 throws IOException

Overrides:

getTileWidth in class ImageReader

Throws:

IOException

getTileHeight

public int getTileHeight(int imageIndex)
                  throws IOException

Overrides:

getTileHeight in class ImageReader

Throws:

IOException

checkIndex

private void checkIndex(int imageIndex)

readHeader

public void readHeader()

getImageTypes

public Iterator getImageTypes(int imageIndex)
                       throws IOException

Specified by:

getImageTypes in class ImageReader

Throws:

IOException

getDefaultReadParam

public ImageReadParam getDefaultReadParam()

Overrides:

getDefaultReadParam in class ImageReader

getImageMetadata

public IIOMetadata getImageMetadata(int imageIndex)
                             throws IOException

Specified by:

getImageMetadata in class ImageReader

Throws:

IOException

getStreamMetadata

public IIOMetadata getStreamMetadata()
                              throws IOException

Specified by:

getStreamMetadata in class ImageReader

Throws:

IOException

read

public BufferedImage read(int imageIndex,
                 ImageReadParam param)
                   throws IOException

Specified by:

read in class ImageReader

Throws:

IOException

readAsRenderedImage

public RenderedImage readAsRenderedImage(int imageIndex,
                                ImageReadParam param)
                                  throws IOException

Overrides:

readAsRenderedImage in class ImageReader

Throws:

IOException

canReadRaster

public boolean canReadRaster()

Overrides:

canReadRaster in class ImageReader

isRandomAccessEasy

public boolean isRandomAccessEasy(int imageIndex)
                           throws IOException

Overrides:

isRandomAccessEasy in class ImageReader

Throws:

IOException

readRaster

public Raster readRaster(int imageIndex,
                ImageReadParam param)
                  throws IOException

Overrides:

readRaster in class ImageReader

Throws:

IOException

isImageTiled

public boolean isImageTiled(int imageIndex)

Overrides:

isImageTiled in class ImageReader

reset

public void reset()

Overrides:

reset in class ImageReader

getAbortRequest

public boolean getAbortRequest()

This method wraps the protected method abortRequested to allow the abortions be monitored by J2KReadState.

getImageType

private ImageTypeSpecifier getImageType(int imageIndex)
                                 throws IOException

Throws:

IOException

dispose

public void dispose()

Overrides:

dispose in class ImageReader

flush

public void flush()

Description copied from interface: MsgLogger

Writes any buffered data from the println() method to the device.

Specified by:

flush in interface MsgLogger

println

public void println(String str,
           int flind,
           int ind)

Description copied from interface: MsgLogger

Prints the string 'str' to the output device, appending a line return. The message is reformatted as appropriate to the particular diplaying device, where 'flind' and 'ind' are used as hints for performing that operation. However, any newlines appearing in 'str' are respected. The output device may not display the string until flush() is called. Some implementations may automatically flush when this method is called. This method just prints the string, the string does not make part of a "message" in the sense that no severity is associated to it.

Specified by:

println in interface MsgLogger

Parameters:

str - The string to print

flind - Indentation of the first line

ind - Indentation of any other lines.

printmsg

public void printmsg(int sev,
            String msg)

Description copied from interface: MsgLogger

Prints the message 'msg' to the output device, appending a newline, with severity 'sev'. Some implementations where the appended newline is irrelevant may not append the newline. Depending on the implementation the severity of the message may be added to it. The message is reformatted as appropriate for the output devic, but any newline characters are respected.

Specified by:

printmsg in interface MsgLogger

Parameters:

sev - The message severity (LOG, INFO, etc.)

msg - The message to display