1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.commons.imaging.palette;
18
19 final class MedianCutPalette extends SimplePalette {
20 private final ColorGroup root;
21
22 MedianCutPalette(final ColorGroup root, final int[] palette) {
23 super(palette);
24 this.root = root;
25 }
26
27 @Override
28 public int getPaletteIndex(final int rgb) {
29 ColorGroup cg = root;
30
31 while (cg.cut != null) {
32 cg = cg.cut.getColorGroup(rgb);
33 }
34
35 return cg.paletteIndex;
36 }
37 }