Package fr.esrf.tangoatk.widget.image

Class JpegDecoder

java.lang.Object

javax.imageio.stream.ImageInputStreamImpl

fr.esrf.tangoatk.widget.image.JpegDecoder

All Implemented Interfaces:

Closeable, DataInput, AutoCloseable, ImageInputStream

public class JpegDecoder
extends ImageInputStreamImpl

A class to decode jpeg image Author: JL Pons

Field Summary

Fields

Modifier and Type	Field	Description
static final int	GRAY8	8 Bits Gray scale
static final int	RGB24	32 Bits RGB

Fields inherited from class javax.imageio.stream.ImageInputStreamImpl

bitOffset, byteOrder, flushedPos, streamPos

Constructor Summary

Constructors

Constructor	Description
JpegDecoder()	Contructs a JPEG decoder

Method Summary

Modifier and Type	Method	Description
byte[][]	decode()	Decode the image
int	GetType()
int	read()
int	read(byte[] b, int off, int len)
void	setBuffer(byte[] jpgBuffer)	Set data

Methods inherited from class javax.imageio.stream.ImageInputStreamImpl

checkClosed, close, finalize, flush, flushBefore, getBitOffset, getByteOrder, getFlushedPosition, getStreamPosition, isCached, isCachedFile, isCachedMemory, length, mark, read, readBit, readBits, readBoolean, readByte, readBytes, readChar, readDouble, readFloat, readFully, readFully, readFully, readFully, readFully, readFully, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedInt, readUnsignedShort, readUTF, reset, seek, setBitOffset, setByteOrder, skipBytes, skipBytes

Methods inherited from class java.lang.Object

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

Field Details

RGB24

public static final int RGB24

32 Bits RGB

See Also:

• Constant Field Values

GRAY8

public static final int GRAY8

8 Bits Gray scale

See Also:

• Constant Field Values

Constructor Details

JpegDecoder

public JpegDecoder()

Contructs a JPEG decoder

Method Details

setBuffer

public void setBuffer(byte[] jpgBuffer)

Set data

Parameters:

jpgBuffer - buffer of encoded data

GetType

public int GetType()

Returns:

type (0 is returned if no image has been decoded)

See Also:

• RGB24
• GRAY8

decode

public byte[][] decode()
                throws IOException

Decode the image

Returns:

An array of 8Bits graysscale or 32Bits RGB

Throws:

IOException - in case of failure

read

public int read()
         throws IOException

Specified by:

read in interface ImageInputStream

Specified by:

read in class ImageInputStreamImpl

Throws:

IOException

read

public int read(byte[] b,
 int off,
 int len)
         throws IOException

Specified by:

read in interface ImageInputStream

Specified by:

read in class ImageInputStreamImpl

Throws:

IOException