PNGImageDecoder (org.apache.xmlgraphics:xmlgraphics-commons 2.7 API)

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: PNGImageDecoder.java 1732018 2016-02-24 04:51:06Z gadams $

Field Summary
- Fields inherited from class org.apache.xmlgraphics.image.codec.util.ImageDecoderImpl
  input, param

Constructor Summary

Constructors
Constructor Description

PNGImageDecoder(InputStream input, PNGDecodeParam param)

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
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 org.apache.xmlgraphics.image.codec.util.ImageDecoderImpl
decodeAsRaster, decodeAsRaster, decodeAsRenderedImage, getInputStream, getNumPages, getParam, setParam

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - PNGImageDecoder
```
public PNGImageDecoder(InputStream input,
                       PNGDecodeParam param)
```
- Method Detail
  - 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