2 * Copyright 2008 ZXing authors
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package com.google.zxing.qrcode.encoder;
19 import junit.framework.TestCase;
22 * @author satorux@google.com (Satoru Takabayashi) - creator
23 * @author mysen@google.com (Chris Mysen) - ported from C++
26 public final class MaskUtilTestCase extends TestCase {
27 public void testApplyMaskPenaltyRule1() {
29 ByteMatrix matrix = new ByteMatrix(4, 1);
34 assertEquals(0, MaskUtil.applyMaskPenaltyRule1(matrix));
37 ByteMatrix matrix = new ByteMatrix(6, 1);
44 assertEquals(3, MaskUtil.applyMaskPenaltyRule1(matrix));
46 assertEquals(4, MaskUtil.applyMaskPenaltyRule1(matrix));
49 ByteMatrix matrix = new ByteMatrix(1, 6);
56 assertEquals(3, MaskUtil.applyMaskPenaltyRule1(matrix));
58 assertEquals(4, MaskUtil.applyMaskPenaltyRule1(matrix));
62 public void testApplyMaskPenaltyRule2() {
64 ByteMatrix matrix = new ByteMatrix(1, 1);
66 assertEquals(0, MaskUtil.applyMaskPenaltyRule2(matrix));
69 ByteMatrix matrix = new ByteMatrix(2, 2);
74 assertEquals(0, MaskUtil.applyMaskPenaltyRule2(matrix));
77 ByteMatrix matrix = new ByteMatrix(2, 2);
82 assertEquals(3, MaskUtil.applyMaskPenaltyRule2(matrix));
85 ByteMatrix matrix = new ByteMatrix(3, 3);
95 // Four instances of 2x2 blocks.
96 assertEquals(3 * 4, MaskUtil.applyMaskPenaltyRule2(matrix));
100 public void testApplyMaskPenaltyRule3() {
102 // Horizontal 00001011101.
103 ByteMatrix matrix = new ByteMatrix(11, 1);
114 matrix.set(10, 0, 1);
115 assertEquals(40, MaskUtil.applyMaskPenaltyRule3(matrix));
118 // Horizontal 10111010000.
119 ByteMatrix matrix = new ByteMatrix(11, 1);
130 matrix.set(10, 0, 0);
131 assertEquals(40, MaskUtil.applyMaskPenaltyRule3(matrix));
134 // Vertical 00001011101.
135 ByteMatrix matrix = new ByteMatrix(1, 11);
146 matrix.set(0, 10, 1);
147 assertEquals(40, MaskUtil.applyMaskPenaltyRule3(matrix));
150 // Vertical 10111010000.
151 ByteMatrix matrix = new ByteMatrix(1, 11);
162 matrix.set(0, 10, 0);
163 assertEquals(40, MaskUtil.applyMaskPenaltyRule3(matrix));
167 public void testApplyMaskPenaltyRule4() {
169 // Dark cell ratio = 0%
170 ByteMatrix matrix = new ByteMatrix(1, 1);
172 assertEquals(100, MaskUtil.applyMaskPenaltyRule4(matrix));
175 // Dark cell ratio = 5%
176 ByteMatrix matrix = new ByteMatrix(2, 1);
179 assertEquals(0, MaskUtil.applyMaskPenaltyRule4(matrix));
182 // Dark cell ratio = 66.67%
183 ByteMatrix matrix = new ByteMatrix(6, 1);
190 assertEquals(30, MaskUtil.applyMaskPenaltyRule4(matrix));
194 private static boolean TestGetDataMaskBitInternal(int maskPattern,
196 for (int x = 0; x < 6; ++x) {
197 for (int y = 0; y < 6; ++y) {
198 if ((expected[y][x] == 1) !=
199 MaskUtil.getDataMaskBit(maskPattern, x, y)) {
207 // See mask patterns on the page 43 of JISX0510:2004.
208 public void testGetDataMaskBit() {
217 assertTrue(TestGetDataMaskBitInternal(0, mask0));
226 assertTrue(TestGetDataMaskBitInternal(1, mask1));
235 assertTrue(TestGetDataMaskBitInternal(2, mask2));
244 assertTrue(TestGetDataMaskBitInternal(3, mask3));
253 assertTrue(TestGetDataMaskBitInternal(4, mask4));
262 assertTrue(TestGetDataMaskBitInternal(5, mask5));
271 assertTrue(TestGetDataMaskBitInternal(6, mask6));
280 assertTrue(TestGetDataMaskBitInternal(7, mask7));