org.apache.batik.transcoder.image

Class PNGTranscoder

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.PNGTranscoder

All Implemented Interfaces:

Transcoder

public class PNGTranscoder
extends ImageTranscoder

This class is an ImageTranscoder that produces a PNG image.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	PNGTranscoder.WriteAdapter This interface is used by PNGTranscoder to write PNG images through different codecs.

Nested classes/interfaces inherited from class org.apache.batik.transcoder.SVGAbstractTranscoder

SVGAbstractTranscoder.SVGAbstractTranscoderUserAgent

Field Summary

Fields

Modifier and Type	Field and Description
static float[]	DEFAULT_CHROMA The default Primary Chromaticities for sRGB imagery.
static TranscodingHints.Key	KEY_GAMMA The gamma correction key.
static TranscodingHints.Key	KEY_INDEXED The color indexed image key to specify number of colors used in palette.

Fields inherited from class org.apache.batik.transcoder.image.ImageTranscoder

KEY_BACKGROUND_COLOR, KEY_FORCE_TRANSPARENT_WHITE

Fields inherited from class org.apache.batik.transcoder.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 org.apache.batik.transcoder.XMLAbstractTranscoder

KEY_DOCUMENT_ELEMENT, KEY_DOCUMENT_ELEMENT_NAMESPACE_URI, KEY_DOM_IMPLEMENTATION, KEY_XML_PARSER_CLASSNAME, KEY_XML_PARSER_VALIDATING

Fields inherited from class org.apache.batik.transcoder.TranscoderSupport

handler, hints

Constructor Summary

Constructors

Constructor and Description
PNGTranscoder() Constructs a new transcoder that produces png images.

Method Summary

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

Methods inherited from class org.apache.batik.transcoder.image.ImageTranscoder

createRenderer, forceTransparentWhite, transcode

Methods inherited from class org.apache.batik.transcoder.SVGAbstractTranscoder

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

Methods inherited from class org.apache.batik.transcoder.TranscoderSupport

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

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.batik.transcoder.Transcoder

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

Field Detail

KEY_GAMMA

public static final TranscodingHints.Key KEY_GAMMA

The gamma correction key.

Key:	KEY_GAMMA
Value:	Float
Default:	PNGEncodeParam.INTENT_PERCEPTUAL
Required:	No
Description:	Controls the gamma correction of the PNG image. A value of zero for gamma disables the generation of a gamma chunk. No value causes an sRGB chunk to be generated.

DEFAULT_CHROMA

public static final float[] DEFAULT_CHROMA

The default Primary Chromaticities for sRGB imagery.

KEY_INDEXED

public static final TranscodingHints.Key KEY_INDEXED

The color indexed image key to specify number of colors used in palette.

Key:	KEY_INDEXED
Value:	Integer
Default:	none/true color image
Required:	No
Description:	Turns on the reduction of the image to index colors by specifying color bit depth, 1, 2, 4 or 8. The resultant PNG will be an indexed PNG with color bit depth specified.

Constructor Detail

PNGTranscoder

public PNGTranscoder()

Constructs a new transcoder that produces png images.

Method Detail

getUserAgent

public UserAgent getUserAgent()

Returns:

the transcoder's user agent

createImage

public java.awt.image.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(java.awt.image.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