org.apache.shindig.gadgets.rewrite.image

Class JPEGOptimizer

java.lang.Object

org.apache.shindig.gadgets.rewrite.image.JPEGOptimizer

public class JPEGOptimizer
extends Object

Optimize JPEG images by either converting them to PNGs or re-encoding them with a more appropriate compression level.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	BaseOptimizer.ImageIOOutputter Standard ImageIO based image outputter
static interface	BaseOptimizer.ImageOutputter Interface to allow for different serialization libraries to be used
static class	BaseOptimizer.SanselanOutputter Sanselan based image outputter

Field Summary

Fields

Modifier and Type	Field and Description
protected byte[]	minBytes
protected int	minLength
protected BaseOptimizer.ImageOutputter	outputter
protected JpegImageUtils.JpegImageParams	sourceImageParams

Constructor Summary

Constructors

Constructor and Description
JPEGOptimizer(OptimizerConfig config, HttpResponseBuilder response)
JPEGOptimizer(OptimizerConfig config, HttpResponseBuilder response, JpegImageUtils.JpegImageParams sourceImageParams)

Method Summary

Methods

Modifier and Type	Method and Description
protected String	getOriginalContentType()
protected String	getOriginalFormatName()
protected String	getOutputContentType()
protected BaseOptimizer.ImageOutputter	getOutputter()
protected byte[]	getRewrittenImage() Get the rewritten image if available
static BufferedImage	readJpeg(InputStream is)
void	rewrite(BufferedImage image)
protected void	rewriteImpl(BufferedImage image)
protected void	write(BufferedImage image) Write the image using a specified write param

Methods inherited from class java.lang.Object

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

Field Detail

outputter

protected BaseOptimizer.ImageOutputter outputter

minBytes

protected byte[] minBytes

minLength

protected int minLength

sourceImageParams

protected JpegImageUtils.JpegImageParams sourceImageParams

Constructor Detail

JPEGOptimizer

public JPEGOptimizer(OptimizerConfig config,
             HttpResponseBuilder response)

JPEGOptimizer

public JPEGOptimizer(OptimizerConfig config,
             HttpResponseBuilder response,
             JpegImageUtils.JpegImageParams sourceImageParams)

Method Detail

readJpeg

public static BufferedImage readJpeg(InputStream is)
                              throws org.apache.sanselan.ImageReadException,
                                     IOException

Throws:

org.apache.sanselan.ImageReadException

IOException

rewriteImpl

protected void rewriteImpl(BufferedImage image)
                    throws IOException

Throws:

IOException

getOutputContentType

protected String getOutputContentType()

getOriginalContentType

protected String getOriginalContentType()

getOriginalFormatName

protected String getOriginalFormatName()

getOutputter

protected BaseOptimizer.ImageOutputter getOutputter()

write

protected void write(BufferedImage image)
              throws IOException

Write the image using a specified write param

Throws:

IOException

rewrite

public void rewrite(BufferedImage image)
             throws IOException

Throws:

IOException

getRewrittenImage

protected final byte[] getRewrittenImage()

Get the rewritten image if available