java.awt.image
Class LookupTable
LookupTable 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.
LookupTable(int offset, int numComponents)- Creates a new
LookupTable instance.
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clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait |
LookupTable
protected LookupTable(int offset,
int numComponents)
throws IllegalArgumentException Creates a new LookupTable instance.
If numComponents is 1, the same translation table is used for all pixel
components.
offset - Offset to be subtracted.numComponents - Number of image components.
getOffset
public int getOffset()
Return the offset.
lookupPixel
public abstract int[] lookupPixel(int[] src,
int[] dest) 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.
src - Component values of a pixel.dest - Destination array for values, or null.
- Translated values for the pixel.
LookupTable.java -- Java class for a pixel translation table.
Copyright (C) 2004, 2005 Free Software Foundation, Inc.
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