com.klg.jclass.util.swing.encode
Class JPEGEncoder

java.lang.Object
  |
  +--com.klg.jclass.util.swing.encode.AbstractImageEncoder
        |
        +--com.klg.jclass.util.swing.encode.JPEGEncoder

All Implemented Interfaces:

Encoder

public class JPEGEncoder

extends AbstractImageEncoder

This class encodes a JPEG file from an Image to an OutputStream. It uses the sun com.sun.image.codec.jpeg package to do the encoding, and hence is usable only under jdk 1.2.2 or later.

Field Summary

float

quality

Constructor Summary

JPEGEncoder()

Method Summary

float	getQuality() Get quality factor for JPEG encoding.
void	saveImage(Image img, OutputStream ofile)
void	setQuality(float qlty) Set quality factor for JPEG encoding.

Methods inherited from class com.klg.jclass.util.swing.encode.AbstractImageEncoder

byteFromChar, byteFromInt, bytesFromInt, bytesFromLong, compressColor, compressColor, createByte, encode, encode, error, snapshot, snapshotJava3d

Methods inherited from class java.lang.Object

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

Field Detail

quality

public float quality

Constructor Detail

JPEGEncoder

public JPEGEncoder()

Method Detail

saveImage

public void saveImage(Image img,
                      OutputStream ofile)
               throws IOException,
                      EncoderException

Specified by:

saveImage in class AbstractImageEncoder

IOException

EncoderException

getQuality

public float getQuality()

Get quality factor for JPEG encoding. The quality factor is a floating point number between 0 and 1. A value of 1 provides the best quality image but features the words compression. A value of 0 provides the best compression but the worst quality image.

Returns:

qlty The quality factor being used. Must be between 0 and 1.

setQuality

public void setQuality(float qlty)

Set quality factor for JPEG encoding. The quality factor is a floating point number between 0 and 1. A value of 1 provides the best quality image but features the words compression. A value of 0 provides the best compression but the worst quality image.

Parameters:

qlty - The quality factor to set. Must be between 0 and 1. If outside these ranges, the value will be clipped to 0 or 1.