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ShortLookupTable.javaAPI DocAndroid 1.5 API4388Wed May 06 22:41:54 BST 2009java.awt.image

ShortLookupTable

public class ShortLookupTable extends LookupTable
The ShortLookupTable class provides provides functionality for lookup operations, and is defined by an input short array for bands or components of image and an offset value. The offset value will be subtracted from the input values before indexing the input arrays. The output of a lookup operation is represented as an unsigned short array.
since
Android 1.0

Fields Summary
private short[]
data
The data.
Constructors Summary
public ShortLookupTable(int offset, short[] data)
Instantiates a new ShortLookupTable with the specified offset value and the specified short array which represents lookup table for all bands.

param
offset the offset value.
param
data the data array.

        super(offset, 1);
        this.data = new short[1][data.length];
        // The data array stored as a reference
        this.data[0] = data;
public ShortLookupTable(int offset, short[] data)
Instantiates a new ShortLookupTable with the specified offset value and the specified short array of arrays which represents lookup table for each band.

param
offset the offset value.
param
data the data array of arrays for each band.

        super(offset, data.length);
        this.data = new short[data.length][data[0].length];
        for (int i = 0; i < data.length; i++) {
            // The data array for each band stored as a reference
            this.data[i] = data[i];
        }
Methods Summary
public final short[][]getTable()
Gets the lookup table of this ShortLookupTable object. If this ShortLookupTable object has one short array for all bands, the returned array length is one.

return
the lookup table of this ShortLookupTable object.

        return data;
public short[]lookupPixel(short[] src, short[] dst)
Returns a short array which contains samples of the specified pixel which is translated with the lookup table of this ShortLookupTable object. The resulted array is stored to the dst array.

param
src the source array.
param
dst the destination array where the result can be stored.
return
the short array of translated samples of a pixel.

        if (dst == null) {
            dst = new short[src.length];
        }

        int offset = getOffset();
        if (getNumComponents() == 1) {
            for (int i = 0; i < src.length; i++) {
                dst[i] = data[0][src[i] - offset];
            }
        } else {
            for (int i = 0; i < getNumComponents(); i++) {
                dst[i] = data[i][src[i] - offset];
            }
        }

        return dst;
public int[]lookupPixel(int[] src, int[] dst)

        if (dst == null) {
            dst = new int[src.length];
        }

        int offset = getOffset();
        if (getNumComponents() == 1) {
            for (int i = 0; i < src.length; i++) {
                dst[i] = data[0][src[i] - offset];
            }
        } else {
            for (int i = 0; i < getNumComponents(); i++) {
                dst[i] = data[i][src[i] - offset];
            }
        }

        return dst;