org.apache.commons.imaging.formats.png.transparencyfilters

Class TransparencyFilter

java.lang.Object

org.apache.commons.imaging.common.BinaryFileParser

org.apache.commons.imaging.formats.png.transparencyfilters.TransparencyFilter

Direct Known Subclasses:

TransparencyFilterGrayscale, TransparencyFilterIndexedColor, TransparencyFilterTrueColor

public abstract class TransparencyFilter
extends BinaryFileParser

Constructor Summary

Constructors

Constructor and Description
TransparencyFilter(byte[] bytes)

Method Summary

Modifier and Type	Method and Description
abstract int	filter(int rgb, int index)
byte	getByte(int offset)
int	getLength()

Methods inherited from class org.apache.commons.imaging.common.BinaryFileParser

getByteOrder, getDebug, setDebug

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TransparencyFilter

public TransparencyFilter(byte[] bytes)

Method Detail

filter

public abstract int filter(int rgb,
                           int index)
                    throws ImageReadException,
                           java.io.IOException

Throws:

ImageReadException

java.io.IOException

getByte

public byte getByte(int offset)

Returns:

a byte

getLength

public int getLength()

Returns:

the length