| java.lang.Object
 java.awt.image.LookupTable
All known Subclasses: java.awt.image.ShortLookupTable, java.awt.image.ByteLookupTable,
| LookupTable | | abstract public class LookupTable extends Object (Code) | | This abstract class defines a lookup table object. ByteLookupTable
and ShortLookupTable are subclasses, which
contain byte and short data, respectively. A lookup table
contains data arrays for one or more bands (or components) of an image
(for example, separate arrays for R, G, and B),
and it contains an offset which will be subtracted from the
input values before indexing into the arrays. 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 bands. All arrays must be the
same size.
See Also: ByteLookupTable
See Also: ShortLookupTable
See Also: LookupOp
version:
10 Feb 1997 |
| Constructor Summary | |
| protected | LookupTable(int offset, int numComponents)
Constructs a new LookupTable from the number of components and an offset
into the lookup table. |
| Method Summary | |
| public int | getNumComponents()
Returns the number of components in the lookup table. | | public int | getOffset()
Returns the offset. | | abstract public int[] | lookupPixel(int[] src, int[] dest)
Returns an int array of components for
one pixel. |
| numComponents | | int numComponents(Code) | | Constants
|
| numEntries | | int numEntries(Code) | | |
| LookupTable | | protected LookupTable(int offset, int numComponents)(Code) | | Constructs a new LookupTable from the number of components and an offset
into the lookup table.
Parameters:
offset - the offset to subtract from input values before indexinginto the data arrays for this LookupTable
Parameters:
numComponents - the number of data arrays in thisLookupTable
throws:
IllegalArgumentException - if offset is less than 0or if numComponents is less than 1 |
| getNumComponents | | public int getNumComponents()(Code) | | Returns the number of components in the lookup table.
the number of components in this LookupTable. |
| getOffset | | public int getOffset()(Code) | | Returns the offset.
the offset of this LookupTable. |
| lookupPixel | | abstract public int[] lookupPixel(int[] src, int[] dest)(Code) | | Returns an int array of components for
one pixel. The dest array contains the
result of the lookup and is returned. If dest is
null, a new array is allocated. The
source and destination can be equal.
Parameters:
src - the source array of components of one pixel
Parameters:
dest - the destination array of components for one pixel,translated with this LookupTable an int array of components for one pixel. |
|
|