OpacityFilter (meteoinfo-image 4.0 API)

java.lang.Object
- org.meteoinfo.image.filter.AbstractBufferedImageOp
- - org.meteoinfo.image.filter.PointFilter
  - - org.meteoinfo.image.filter.OpacityFilter

所有已实现的接口:

BufferedImageOp, Cloneable
```
public class OpacityFilter
extends PointFilter
```
Sets the opacity (alpha) of every pixel in an image to a constant value.

字段概要
- 从类继承的字段 org.meteoinfo.image.filter.PointFilter
  canFilterIndexColorModel

构造器概要

构造器
构造器说明

OpacityFilter()
Construct an OpacityFilter with 50% opacity.

OpacityFilter(int opacity)
Construct an OpacityFilter with the given opacity (alpha).

方法概要

所有方法实例方法具体方法
修饰符和类型	方法	说明
`int`	`filterRGB(int x, int y, int rgb)`
`int`	`getOpacity()`	Get the opacity setting.
`void`	`setOpacity(int opacity)`	Set the opacity.
`String`	`toString()`

从类继承的方法 org.meteoinfo.image.filter.PointFilter
filter, setDimensions

从类继承的方法 org.meteoinfo.image.filter.AbstractBufferedImageOp
clone, createCompatibleDestImage, getBounds2D, getPoint2D, getRenderingHints, getRGB, setRGB

从类继承的方法 java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- 构造器详细资料
  - OpacityFilter
```
public OpacityFilter()
```
    Construct an OpacityFilter with 50% opacity.
  - OpacityFilter
```
public OpacityFilter(int opacity)
```
    Construct an OpacityFilter with the given opacity (alpha).
    
    参数:
    
    opacity - the opacity (alpha) in the range 0..255
- 方法详细资料
  - setOpacity
```
public void setOpacity(int opacity)
```
    Set the opacity.
    
    参数:
    
    opacity - the opacity (alpha) in the range 0..255
    
    另请参阅:
    
    getOpacity()
  - getOpacity
```
public int getOpacity()
```
    Get the opacity setting.
    
    返回:
    
    the opacity
    
    另请参阅:
    
    setOpacity(int)
  - filterRGB
```
public int filterRGB(int x,
                     int y,
                     int rgb)
```
    指定者:
    
    filterRGB 在类中 PointFilter
  - toString
```
public String toString()
```
    覆盖:
    
    toString 在类中 Object