PixelsWriterDefault (PNGJ 2.1.0 API)

java.lang.Object
- ar.com.hjg.pngj.pixels.PixelsWriter
- - ar.com.hjg.pngj.pixels.PixelsWriterDefault

```
public class PixelsWriterDefault
extends PixelsWriter
```
Default implementation of PixelsWriter, with fixed filters and also adaptive strategies.

Field Summary

Fields
Modifier and Type	Field and Description
`protected int`	`adaptMaxSkip` parameters for adaptive strategy
`protected int`	`adaptNextRow`
`protected double`	`adaptSkipIncreaseFactor`
`protected int`	`adaptSkipIncreaseSinceRow`
`protected FilterType`	`curfilterType` currently concrete selected filter type
`protected FiltersPerformance`	`filtersPerformance` evaluates different filters, for adaptive strategy
`protected byte[]`	`rowb` current raw row
`protected byte[]`	`rowbfilter` buffer for filtered row
`protected byte[]`	`rowbprev` previous raw row

Fields inherited from class ar.com.hjg.pngj.pixels.PixelsWriter
buflen, bytesPixel, bytesRow, currentRow, deflaterCompLevel, deflaterStrategy, filterType, imgInfo, initdone

Constructor Summary

Constructors
Constructor and Description

PixelsWriterDefault(ImageInfo imgInfo)

Constructors
Constructor and Description
`PixelsWriterDefault(ImageInfo imgInfo)`

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`close()` cleanup.
`protected void`	`decideCurFilterType()`
`protected void`	`filterAndWrite(byte[] rowb)` This does the filtering and send to stream.
`byte[]`	`getRowb()` This will be called by the PngWrite to fill the raw pixels for each row.
`protected void`	`initParams()` called by init(); override (calling this first) to do additional initialization
`void`	`setFilterWeights(double[] weights)` Only for adaptive strategies.
`void`	`setPreferenceForNone(double preferenceForNone)` Only for adaptive strategies.
`void`	`tuneMemory(double m)` Only for adaptive strategies.

Methods inherited from class ar.com.hjg.pngj.pixels.PixelsWriter
filterRowWithFilterType, getCompression, getDefaultFilter, getDeflaterCompLevel, getFiltersUsed, getFilterType, getOs, getTotalBytesToWrite, init, processRow, sendToCompressedStream, setCompressorStream, setDeflaterCompLevel, setDeflaterStrategy, setFilterType, setOs

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

- Field Detail
  - rowb
```
protected byte[] rowb
```
    current raw row
  - rowbprev
```
protected byte[] rowbprev
```
    previous raw row
  - rowbfilter
```
protected byte[] rowbfilter
```
    buffer for filtered row
  - filtersPerformance
```
protected FiltersPerformance filtersPerformance
```
    evaluates different filters, for adaptive strategy
  - curfilterType
```
protected FilterType curfilterType
```
    currently concrete selected filter type
  - adaptMaxSkip
```
protected int adaptMaxSkip
```
    parameters for adaptive strategy
  - adaptSkipIncreaseSinceRow
```
protected int adaptSkipIncreaseSinceRow
```
  - adaptSkipIncreaseFactor
```
protected double adaptSkipIncreaseFactor
```
  - adaptNextRow
```
protected int adaptNextRow
```
- Constructor Detail
  - PixelsWriterDefault
```
public PixelsWriterDefault(ImageInfo imgInfo)
```
- Method Detail
  - initParams
```
protected void initParams()
```
    Description copied from class: PixelsWriter
    
    called by init(); override (calling this first) to do additional initialization
    
    Overrides:
    
    initParams in class PixelsWriter
  - filterAndWrite
```
protected void filterAndWrite(byte[] rowb)
```
    Description copied from class: PixelsWriter
    
    This does the filtering and send to stream. Typically should decide the filtering, call PixelsWriter.filterRowWithFilterType(FilterType, byte[], byte[], byte[]) and and PixelsWriter.sendToCompressedStream(byte[])
    
    Specified by:
    
    filterAndWrite in class PixelsWriter
  - decideCurFilterType
```
protected void decideCurFilterType()
```
  - getRowb
```
public byte[] getRowb()
```
    Description copied from class: PixelsWriter
    
    This will be called by the PngWrite to fill the raw pixels for each row. This can change from call to call. Warning: this can be called before the object is init, implementations should call init() to be sure
    
    Specified by:
    
    getRowb in class PixelsWriter
  - close
```
public void close()
```
    Description copied from class: PixelsWriter
    
    cleanup. This should be called explicitly. Idempotent and secure
    
    Overrides:
    
    close in class PixelsWriter
  - setPreferenceForNone
```
public void setPreferenceForNone(double preferenceForNone)
```
    Only for adaptive strategies. See FiltersPerformance.setPreferenceForNone(double)
  - tuneMemory
```
public void tuneMemory(double m)
```
    Only for adaptive strategies. See FiltersPerformance.tuneMemory(double)
  - setFilterWeights
```
public void setFilterWeights(double[] weights)
```
    Only for adaptive strategies. See FiltersPerformance.setFilterWeights(double[])

Class PixelsWriterDefault

Field Summary

Fields inherited from class ar.com.hjg.pngj.pixels.PixelsWriter

Constructor Summary

Method Summary

Methods inherited from class ar.com.hjg.pngj.pixels.PixelsWriter

Methods inherited from class java.lang.Object

Field Detail

rowb

rowbprev

rowbfilter

filtersPerformance

curfilterType

adaptMaxSkip

adaptSkipIncreaseSinceRow

adaptSkipIncreaseFactor

adaptNextRow

Constructor Detail

PixelsWriterDefault

Method Detail

initParams

filterAndWrite

decideCurFilterType

getRowb

close

setPreferenceForNone

tuneMemory

setFilterWeights