| /* |
| * Licensed 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. |
| * under the License. |
| */ |
| |
| package org.apache.commons.imaging.formats.jpeg; |
| |
| public class ZigZag |
| { |
| private static final int zigZag[] = |
| { |
| 0, 1, 5, 6, 14, 15, 27, 28, |
| 2, 4, 7, 13, 16, 26, 29, 42, |
| 3, 8, 12, 17, 25, 30, 41, 43, |
| 9, 11, 18, 24, 31, 40, 44, 53, |
| 10, 19, 23, 32, 39, 45, 52, 54, |
| 20, 22, 33, 38, 46, 51, 55, 60, |
| 21, 34, 37, 47, 50, 56, 59, 61, |
| 35, 36, 48, 49, 57, 58, 62, 63 |
| }; |
| |
| public static void zigZagToBlock(int[] zz, int[] block) |
| { |
| for (int i = 0; i < 64; i++) |
| { |
| block[i] = zz[zigZag[i]]; |
| } |
| } |
| |
| public static void blockToZigZag(int[] block, int[] zz) |
| { |
| for (int i = 0; i < 64; i++) |
| { |
| zz[zigZag[i]] = block[i]; |
| } |
| } |
| } |