Class PNGImageDecoder

java.lang.Object

org.apache.xmlgraphics.image.codec.util.ImageDecoderImpl

org.apache.xmlgraphics.image.codec.png.PNGImageDecoder

All Implemented Interfaces:

ImageDecoder

public class PNGImageDecoder
extends ImageDecoderImpl

Version:

$Id$

Field Summary

Fields inherited from class ImageDecoderImpl

input, param

Constructor Summary

Constructors

Constructor	Description
PNGImageDecoder(InputStream input, PNGDecodeParam param)

Method Summary

Modifier and Type	Method	Description
RenderedImage	decodeAsRenderedImage(int page)	Returns a RenderedImage that contains the decoded contents of the SeekableStream associated with this ImageDecoder.
static void	readPNGHeader(ImageInputStream inputStream, ImageSize size)

Methods inherited from class ImageDecoderImpl

decodeAsRaster, decodeAsRaster, decodeAsRenderedImage, getInputStream, getNumPages, getParam, setParam

Methods inherited from class Object

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

Constructor Details

PNGImageDecoder

public PNGImageDecoder(InputStream input,
 PNGDecodeParam param)

Method Details

decodeAsRenderedImage

public RenderedImage decodeAsRenderedImage(int page)
                                    throws IOException

Description copied from class: ImageDecoderImpl

Returns a RenderedImage that contains the decoded contents of the SeekableStream associated with this ImageDecoder. The given page of a multi-page image is decoded. If the page does not exist, an IOException will be thrown. Page numbering begins at zero.

Specified by:

decodeAsRenderedImage in interface ImageDecoder

Specified by:

decodeAsRenderedImage in class ImageDecoderImpl

Parameters:

page - The page to be decoded.

Throws:

IOException

readPNGHeader

public static void readPNGHeader(ImageInputStream inputStream,
 ImageSize size)
                          throws IOException

Throws:

IOException