ContrastFilter

All Implemented Interfaces:

com.otaliastudios.cameraview.filter.Filter , com.otaliastudios.cameraview.filter.OneParameterFilter
```
public class ContrastFilter
extends BaseFilter implements OneParameterFilter
                    
```
Adjusts the contrast.

Field Summary

Fields
Modifier and Type	Field	Description
`private float`	`contrast`

Constructor Summary

Constructors
Constructor	Description
`ContrastFilter()`

Method Summary

Modifier and Type	Method	Description
`float`	`getContrast()`	Returns the current contrast.
`void`	`setContrast(float contrast)`	Sets the current contrast adjustment.1.0: no adjustment2.
`void`	`setParameter1(float value)`	Sets the parameter.The value should always be between 0 and 1.
`float`	`getParameter1()`	Returns the parameter.The returned value should always be between 0 and 1.
`String`	`getFragmentShader()`	Returns a String containing the fragment shader.
`void`	`onCreate(int programHandle)`	The filter program was just created.
`void`	`onDestroy()`	The filter program is about to be destroyed.

Methods inherited from class com.otaliastudios.cameraview.filter.BaseFilter
copy, draw, getVertexShader, setSize
Methods inherited from class com.otaliastudios.cameraview.filter.Filter
copy
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ContrastFilter
```
ContrastFilter()
```
- Method Detail
  - getContrast
```
 float getContrast()
```
    Returns the current contrast.
  - setContrast
```
 void setContrast(float contrast)
```
    Sets the current contrast adjustment.1.0: no adjustment2.0: increased contrast
    
    Parameters:
    
    contrast - contrast
  - setParameter1
```
 void setParameter1(float value)
```
    Sets the parameter.The value should always be between 0 and 1.
    
    Parameters:
    
    value - parameter
  - getParameter1
```
 float getParameter1()
```
    Returns the parameter.The returned value should always be between 0 and 1.
  - getFragmentShader
```
@NonNull() String getFragmentShader()
```
    Returns a String containing the fragment shader.Together with getVertexShader, this will be used tocreate the OpenGL program.
  - onCreate
```
 void onCreate(int programHandle)
```
    The filter program was just created. We pass in a handle to the OpenGLprogram that was created, so you can fetch pointers.
    
    Parameters:
    
    programHandle - handle
  - onDestroy
```
 void onDestroy()
```
    The filter program is about to be destroyed.