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 }