java.awt.image
Class ShortLookupTable
public
class
ShortLookupTable
extends LookupTable
ShortLookupTable represents translation arrays for pixel values. It wraps
one or more data arrays for each layer (or component) in an image, such as
Alpha, R, G, and B. When doing translation, the offset is subtracted from
the pixel values to allow a subset of an array to be used.
| Method Summary |
|---|
| short[][] | getTable()
Return the lookup tables. |
| int[] | lookupPixel(int[] src, int[] dst)
Return translated values for a pixel.
|
| short[] | lookupPixel(short[] src, short[] dst)
Return translated values for a pixel.
|
public ShortLookupTable(int offset, short[][] data)
Creates a new
ShortLookupTable instance.
Offset is subtracted from pixel values when looking up in the translation
tables. If data.length is one, the same table is applied to all pixel
components.
Parameters: offset Offset to be subtracted. data Array of lookup tables.
Throws: IllegalArgumentException if offset < 0 or data.length < 1.
public ShortLookupTable(int offset, short[] data)
Creates a new
ShortLookupTable instance.
Offset is subtracted from pixel values when looking up in the translation
table. The same table is applied to all pixel components.
Parameters: offset Offset to be subtracted. data Lookup table for all components (null not
permitted).
Throws: IllegalArgumentException if offset < 0.
public final short[][] getTable()
Return the lookup tables. This is a reference to the actual table, so
modifying the contents of the returned array will modify the lookup table.
Returns: The lookup table.
public int[] lookupPixel(int[] src, int[] dst)
Return translated values for a pixel.
For each value in the pixel src, use the value minus offset as an index
in the component array and copy the value there to the output for the
component. If dest is null, the output is a new array, otherwise the
translated values are written to dest. Dest can be the same array as
src.
For example, if the pixel src is [2, 4, 3], and offset is 1, the output
is [comp1[1], comp2[3], comp3[2]], where comp1, comp2, and comp3 are the
translation arrays.
Parameters: src Component values of a pixel. dst Destination array for values, or null.
Returns: Translated values for the pixel.
public short[] lookupPixel(short[] src, short[] dst)
Return translated values for a pixel.
For each value in the pixel src, use the value minus offset as an index
in the component array and copy the value there to the output for the
component. If dest is null, the output is a new array, otherwise the
translated values are written to dest. Dest can be the same array as
src.
For example, if the pixel src is [2, 4, 3], and offset is 1, the output
is [comp1[1], comp2[3], comp3[2]], where comp1, comp2, and comp3 are the
translation arrays.
Parameters: src Component values of a pixel. dst Destination array for values, or null.
Returns: Translated values for the pixel.