PNGEncoder (zk 10.0.0 API)

java.lang.Object
- org.zkoss.image.encoder.PNGEncoder

All Implemented Interfaces:

ImageEncoder
```
public class PNGEncoder
extends java.lang.Object
implements ImageEncoder
```
The encoder for encoding an image into the PNG format

Since:

3.0.7

Author:

tomyeh

Constructor Summary

Constructors
Constructor Description

PNGEncoder()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`byte[]`	`encode(java.awt.image.RenderedImage image)`	Encodes an AWT image into a byte array in a particular format.
`float`	`getQuality()`	Always return 1.0 since no quality degrade.
`boolean`	`isEncodingAlpha()`	Returns whether to encode the alpha transparency.
`void`	`setEncodingAlpha(boolean encodeAlpha)`	Sets whether to encode the alpha transparency.
`void`	`setQuality(float quality)`	Sets the quality of the image encoding.

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

- Constructor Detail
  - PNGEncoder
```
public PNGEncoder()
```
- Method Detail
  - encode
```
public byte[] encode(java.awt.image.RenderedImage image)
              throws java.io.IOException
```
    Description copied from interface: ImageEncoder
    
    Encodes an AWT image into a byte array in a particular format.
    
    Specified by:
    
    encode in interface ImageEncoder
    
    Throws:
    
    java.io.IOException
  - getQuality
```
public float getQuality()
```
    Always return 1.0 since no quality degrade.
    
    Specified by:
    
    getQuality in interface ImageEncoder
  - setQuality
```
public void setQuality(float quality)
```
    Description copied from interface: ImageEncoder
    
    Sets the quality of the image encoding. Simply does nothing if the encoder does not support it.
    
    Specified by:
    
    setQuality in interface ImageEncoder
  - isEncodingAlpha
```
public boolean isEncodingAlpha()
```
    Description copied from interface: ImageEncoder
    
    Returns whether to encode the alpha transparency.
    
    Specified by:
    
    isEncodingAlpha in interface ImageEncoder
  - setEncodingAlpha
```
public void setEncodingAlpha(boolean encodeAlpha)
```
    Description copied from interface: ImageEncoder
    
    Sets whether to encode the alpha transparency. Simply does nothing if the encoder does not support it.
    
    Specified by:
    
    setEncodingAlpha in interface ImageEncoder