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

Class AbstractTransparencyFilter

java.lang.Object

org.apache.commons.imaging.common.BinaryFileParser

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

Direct Known Subclasses:

TransparencyFilterGrayscale, TransparencyFilterIndexedColor, TransparencyFilterTrueColor

public abstract class AbstractTransparencyFilter
extends BinaryFileParser

Constructor Summary

Constructors

Constructor	Description
AbstractTransparencyFilter(byte[] bytes)	Constructs a new instance.

Method Summary

Modifier and Type	Method	Description
abstract int	filter(int rgb, int index)
byte	getByte(int offset)	Gets the byte at the given offset.
int	getLength()	Gets the length.

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

debugNumber, debugNumber, getByteOrder, setByteOrder

Methods inherited from class java.lang.Object

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

Constructor Details

AbstractTransparencyFilter

public AbstractTransparencyFilter(byte[] bytes)

Constructs a new instance.

Parameters:

bytes - bytes.

Method Details

filter

public abstract int filter(int rgb,
 int index)
                    throws ImagingException,
IOException

Throws:

ImagingException

IOException

getByte

public byte getByte(int offset)

Gets the byte at the given offset.

Parameters:

offset - offset.

Returns:

a byte.

getLength

public int getLength()

Gets the length.

Returns:

the length