| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.commons.imaging.palette; |
| |
| import org.apache.commons.imaging.ImageWriteException; |
| |
| /** |
| * Color palette. |
| */ |
| public abstract class Palette { |
| |
| /** |
| * Looks up the palette index for a given color. |
| * @param rgb the color to look up |
| * @return the palette index |
| * @throws ImageWriteException |
| */ |
| public abstract int getPaletteIndex(int rgb) throws ImageWriteException; |
| |
| /** |
| * Looks up the color for a given palette index. |
| * @param index the palette index to look up |
| * @return the color in ARGB format |
| */ |
| public abstract int getEntry(int index); |
| |
| /** |
| * The number of entries in the palette. |
| * @return the number of palette entries |
| */ |
| public abstract int length(); |
| |
| public void dump() { |
| } |
| |
| } |