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Class java.awt.image.ByteLookupTable

java.lang.Object
    |
    +----java.awt.image.LookupTable
            |
            +----java.awt.image.ByteLookupTable

public class ByteLookupTable
extends LookupTable
This class defines a lookup table object. The lookup table contains byte data for one or more tile channels or image components (for example, separate arrays for R, G, and B), and it contains an offset which will be subtracted from the input value before indexing the array. This allows an array smaller than the native data size to be provided for a constrained input. If there is only one array in the lookup table, it will be applied to all channels. The byte data is expected to be unsigned data so it will be ANDed with 0xff before it is used to index into the lookup table.

See Also:
ShortLookupTable, LookupOp

Constructor Summary
 ByteLookupTable(int offset, byte[][] data)
Create a LookupTable object from an array of byte arrays representing a lookup table for each tile channel.
 ByteLookupTable(int offset, byte[] data)
Create a LookupTable object from an array of bytes representing a lookup table for each tile channel.
 

Method Summary
byte[][]  getDataStorage()
Returns the lookup table data.
int[]  lookupPixel(int[] src, int[] dst)
Returns an array of components of a pixel, translated with the lookup table.
byte[]  lookupPixel(byte[] src, byte[] dst)
Returns an array of components of a pixel, translated with the lookup table.
 
Methods inherited from class java.awt.image.LookupTable
 getNumComponents, getOffset, lookupPixel
 
Methods inherited from class java.lang.Object
 clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

ByteLookupTable

public ByteLookupTable(int offset,
                       byte[][] data)
Create a LookupTable object from an array of byte arrays representing a lookup table for each tile channel. The offset will be subtracted from the input value before indexing into the arrays. The number of components is the length of the data argument. The data array for each component stored as a reference.

ByteLookupTable

public ByteLookupTable(int offset,
                       byte[] data)
Create a LookupTable object from an array of bytes representing a lookup table for each tile channel. The offset will be subtracted from the input value before indexing into the array. The number of components is one. The data array will be stored internally.
Method Detail

getDataStorage

public byte[][] getDataStorage()
Returns the lookup table data.
Returns:
LookupTable data array.

lookupPixel

public int[] lookupPixel(int[] src,
                         int[] dst)
Returns an array of components of a pixel, translated with the lookup table. The source and destination can be equal. If dst is null, a new array will be allocated. The dst array is returned.
Returns:
an int array of components.
Overrides:
lookupPixel in class LookupTable

lookupPixel

public byte[] lookupPixel(byte[] src,
                          byte[] dst)
Returns an array of components of a pixel, translated with the lookup table. The source and destination can be equal. If dst is null, a new array will be allocated. The dst array is returned.
Returns:
a byte array of components.

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