Class JPEGTranscoder

java.lang.Object

org.apache.batik.transcoder.TranscoderSupport

org.apache.batik.transcoder.AbstractTranscoder

org.apache.batik.transcoder.XMLAbstractTranscoder

org.apache.batik.transcoder.SVGAbstractTranscoder

org.apache.batik.transcoder.image.ImageTranscoder

org.apache.batik.transcoder.image.JPEGTranscoder

All Implemented Interfaces:

Transcoder

public class JPEGTranscoder
extends ImageTranscoder

This class is an ImageTranscoder that produces a JPEG image.

Version:

$Id$

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	JPEGTranscoder.OutputStreamWrapper	This class will never throw an IOException, instead it eats them and then ignores any future calls to it's interface.
private static class	JPEGTranscoder.QualityKey	A transcoding Key represented the JPEG image quality.

Nested classes/interfaces inherited from class SVGAbstractTranscoder

SVGAbstractTranscoder.SVGAbstractTranscoderUserAgent

Field Summary

Fields

Modifier and Type	Field	Description
static final TranscodingHints.Key	KEY_QUALITY	The encoder quality factor key.

Fields inherited from class ImageTranscoder

KEY_BACKGROUND_COLOR, KEY_FORCE_TRANSPARENT_WHITE

Fields inherited from class SVGAbstractTranscoder

builder, ctx, curAOI, curTxf, DEFAULT_ALLOWED_SCRIPT_TYPES, DEFAULT_DEFAULT_FONT_FAMILY, height, KEY_ALLOW_EXTERNAL_RESOURCES, KEY_ALLOWED_SCRIPT_TYPES, KEY_ALTERNATE_STYLESHEET, KEY_AOI, KEY_CONSTRAIN_SCRIPT_ORIGIN, KEY_DEFAULT_FONT_FAMILY, KEY_EXECUTE_ONLOAD, KEY_HEIGHT, KEY_LANGUAGE, KEY_MAX_HEIGHT, KEY_MAX_WIDTH, KEY_MEDIA, KEY_PIXEL_TO_MM, KEY_PIXEL_UNIT_TO_MILLIMETER, KEY_SNAPSHOT_TIME, KEY_USER_STYLESHEET_URI, KEY_WIDTH, root, userAgent, width

Fields inherited from class XMLAbstractTranscoder

KEY_DOCUMENT_ELEMENT, KEY_DOCUMENT_ELEMENT_NAMESPACE_URI, KEY_DOM_IMPLEMENTATION, KEY_XML_PARSER_CLASSNAME, KEY_XML_PARSER_VALIDATING

Fields inherited from class TranscoderSupport

handler, hints

Constructor Summary

Constructors

Constructor	Description
JPEGTranscoder()	Constructs a new transcoder that produces jpeg images.

Method Summary

Modifier and Type	Method	Description
BufferedImage	createImage(int width, int height)	Creates a new ARGB image with the specified dimension.
void	writeImage(BufferedImage img, TranscoderOutput output)	Writes the specified image to the specified output.

Methods inherited from class ImageTranscoder

createRenderer, forceTransparentWhite, transcode

Methods inherited from class SVGAbstractTranscoder

createBridgeContext, createBridgeContext, createBridgeContext, createDocumentFactory, createUserAgent, getCanvasGraphicsNode, setImageSize, transcode

Methods inherited from class TranscoderSupport

addTranscodingHint, getErrorHandler, getTranscodingHints, removeTranscodingHint, setErrorHandler, setTranscodingHints, setTranscodingHints

Methods inherited from class Object

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

Methods inherited from interface Transcoder

addTranscodingHint, getErrorHandler, getTranscodingHints, removeTranscodingHint, setErrorHandler, setTranscodingHints, setTranscodingHints

Field Details

KEY_QUALITY

public static final TranscodingHints.Key KEY_QUALITY

The encoder quality factor key.

Key:	KEY_QUALITY
Value:	Float (between 0 and 1)
Default:	0.75 (lossy)
Required:	Recommended
Description:	Specify the JPEG image encoding quality.

Constructor Details

JPEGTranscoder

public JPEGTranscoder()

Constructs a new transcoder that produces jpeg images.

Method Details

createImage

public BufferedImage createImage(int width,
 int height)

Creates a new ARGB image with the specified dimension.

Specified by:

createImage in class ImageTranscoder

Parameters:

width - the image width in pixels

height - the image height in pixels

writeImage

public void writeImage(BufferedImage img,
 TranscoderOutput output)
                throws TranscoderException

Writes the specified image to the specified output.

Specified by:

writeImage in class ImageTranscoder

Parameters:

img - the image to write

output - the output where to store the image

Throws:

TranscoderException - if an error occured while storing the image