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/*
* 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.decoder;
final class ZigZag {
private static final int[] ZIG_ZAG = {
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
};
private ZigZag() {
}
public static void zigZagToBlock(final int[] zz, final int[] block) {
for (int i = 0; i < 64; i++) {
block[i] = zz[ZIG_ZAG[i]];
}
}
public static void blockToZigZag(final int[] block, final int[] zz) {
for (int i = 0; i < 64; i++) {
zz[ZIG_ZAG[i]] = block[i];
}
}
}