org.wamblee.utils
Class JpegUtils

java.lang.Object
  org.wamblee.utils.JpegUtils

public class JpegUtils
extends java.lang.Object

Utility functions for processing JPEG images.

Author:

Erik Brakkee

Constructor Summary

JpegUtils()

Method Summary

static java.awt.image.BufferedImage	loadJpegImage(java.io.InputStream aInput) Loads a jpeg image from an input stream.
static java.awt.image.BufferedImage	scaleImage(int aMaxWidth, int aMaxHeight, java.awt.Image aImage) Scales an image preserving the aspect ratio.
static void	writeJpegImage(java.io.OutputStream aOutput, int aQuality, java.awt.image.BufferedImage aThumbImage) Writes a JPEG image.

Methods inherited from class java.lang.Object

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

Constructor Detail

JpegUtils

public JpegUtils()

Method Detail

scaleImage

public static java.awt.image.BufferedImage scaleImage(int aMaxWidth,
                                                      int aMaxHeight,
                                                      java.awt.Image aImage)

Scales an image preserving the aspect ratio.

Parameters:

aMaxWidth - Maximum width.

aMaxHeight - Maximum height.

aImage - Image to scale.

Returns:

Scaled image.

loadJpegImage

public static java.awt.image.BufferedImage loadJpegImage(java.io.InputStream aInput)
                                                  throws java.io.IOException,
                                                         java.lang.InterruptedException

Loads a jpeg image from an input stream.

Parameters:

aInput - Input stream.

Returns:

JPEG image.

Throws:

java.io.IOException - In case of IO problems.

java.lang.InterruptedException - When execution is interrupted.

writeJpegImage

public static void writeJpegImage(java.io.OutputStream aOutput,
                                  int aQuality,
                                  java.awt.image.BufferedImage aThumbImage)
                           throws java.io.IOException

Writes a JPEG image.

Parameters:

aOutput - Output stream to write to.

aQuality - Quality of the JPEG image in the range 0..100

aThumbImage -

Throws:

java.io.IOException