138 lines
4.3 KiB
Java
138 lines
4.3 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @author Oleg V. Khaschansky
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* @version $Revision$
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*
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* @date: Oct 14, 2005
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*/
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package java.awt.image;
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/**
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* The ShortLookupTable class provides provides functionality for lookup
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* operations, and is defined by an input short array for bands or components of
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* image and an offset value. The offset value will be subtracted from the input
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* values before indexing the input arrays. The output of a lookup operation is
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* represented as an unsigned short array.
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*
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* @since Android 1.0
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*/
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public class ShortLookupTable extends LookupTable {
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/**
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* The data.
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*/
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private short data[][];
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/**
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* Instantiates a new ShortLookupTable with the specified offset value and
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* the specified short array which represents lookup table for all bands.
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*
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* @param offset
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* the offset value.
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* @param data
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* the data array.
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*/
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public ShortLookupTable(int offset, short[] data) {
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super(offset, 1);
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this.data = new short[1][data.length];
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// The data array stored as a reference
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this.data[0] = data;
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}
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/**
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* Instantiates a new ShortLookupTable with the specified offset value and
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* the specified short array of arrays which represents lookup table for
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* each band.
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*
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* @param offset
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* the offset value.
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* @param data
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* the data array of arrays for each band.
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*/
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public ShortLookupTable(int offset, short[][] data) {
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super(offset, data.length);
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this.data = new short[data.length][data[0].length];
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for (int i = 0; i < data.length; i++) {
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// The data array for each band stored as a reference
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this.data[i] = data[i];
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}
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}
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/**
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* Gets the lookup table of this ShortLookupTable object. If this
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* ShortLookupTable object has one short array for all bands, the returned
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* array length is one.
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*
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* @return the lookup table of this ShortLookupTable object.
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*/
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public final short[][] getTable() {
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return data;
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}
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/**
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* Returns a short array which contains samples of the specified pixel which
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* is translated with the lookup table of this ShortLookupTable object. The
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* resulted array is stored to the dst array.
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*
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* @param src
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* the source array.
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* @param dst
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* the destination array where the result can be stored.
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* @return the short array of translated samples of a pixel.
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*/
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public short[] lookupPixel(short[] src, short[] dst) {
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if (dst == null) {
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dst = new short[src.length];
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}
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int offset = getOffset();
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if (getNumComponents() == 1) {
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for (int i = 0; i < src.length; i++) {
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dst[i] = data[0][src[i] - offset];
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}
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} else {
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for (int i = 0; i < getNumComponents(); i++) {
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dst[i] = data[i][src[i] - offset];
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}
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}
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return dst;
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}
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@Override
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public int[] lookupPixel(int[] src, int[] dst) {
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if (dst == null) {
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dst = new int[src.length];
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}
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int offset = getOffset();
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if (getNumComponents() == 1) {
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for (int i = 0; i < src.length; i++) {
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dst[i] = data[0][src[i] - offset];
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}
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} else {
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for (int i = 0; i < getNumComponents(); i++) {
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dst[i] = data[i][src[i] - offset];
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}
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}
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return dst;
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}
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}
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