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 com.google.zxing.common.ByteMatrix;
20 import junit.framework.TestCase;
23 * @author satorux@google.com (Satoru Takabayashi) - creator
24 * @author mysen@google.com (Chris Mysen) - ported from C++
27 public final class MaskUtilTestCase extends TestCase {
28 public void testApplyMaskPenaltyRule1() {
30 ByteMatrix matrix = new ByteMatrix(1, 4);
35 assertEquals(0, MaskUtil.applyMaskPenaltyRule1(matrix));
38 ByteMatrix matrix = new ByteMatrix(1, 6);
45 assertEquals(3, MaskUtil.applyMaskPenaltyRule1(matrix));
47 assertEquals(4, MaskUtil.applyMaskPenaltyRule1(matrix));
50 ByteMatrix matrix = new ByteMatrix(6, 1);
57 assertEquals(3, MaskUtil.applyMaskPenaltyRule1(matrix));
59 assertEquals(4, MaskUtil.applyMaskPenaltyRule1(matrix));
63 public void testApplyMaskPenaltyRule2() {
65 ByteMatrix matrix = new ByteMatrix(1, 1);
67 assertEquals(0, MaskUtil.applyMaskPenaltyRule2(matrix));
70 ByteMatrix matrix = new ByteMatrix(2, 2);
75 assertEquals(0, MaskUtil.applyMaskPenaltyRule2(matrix));
78 ByteMatrix matrix = new ByteMatrix(2, 2);
83 assertEquals(3, MaskUtil.applyMaskPenaltyRule2(matrix));
86 ByteMatrix matrix = new ByteMatrix(3, 3);
96 // Four instances of 2x2 blocks.
97 assertEquals(3 * 4, MaskUtil.applyMaskPenaltyRule2(matrix));
101 public void testApplyMaskPenaltyRule3() {
103 // Horizontal 00001011101.
104 ByteMatrix matrix = new ByteMatrix(1, 11);
115 matrix.set(0, 10, 1);
116 assertEquals(40, MaskUtil.applyMaskPenaltyRule3(matrix));
119 // Horizontal 10111010000.
120 ByteMatrix matrix = new ByteMatrix(1, 11);
131 matrix.set(0, 10, 0);
132 assertEquals(40, MaskUtil.applyMaskPenaltyRule3(matrix));
135 // Vertical 00001011101.
136 ByteMatrix matrix = new ByteMatrix(11, 1);
147 matrix.set(10, 0, 1);
148 assertEquals(40, MaskUtil.applyMaskPenaltyRule3(matrix));
151 // Vertical 10111010000.
152 ByteMatrix matrix = new ByteMatrix(11, 1);
163 matrix.set(10, 0, 0);
164 assertEquals(40, MaskUtil.applyMaskPenaltyRule3(matrix));
168 public void testApplyMaskPenaltyRule4() {
170 // Dark cell ratio = 0%
171 ByteMatrix matrix = new ByteMatrix(1, 1);
173 assertEquals(100, MaskUtil.applyMaskPenaltyRule4(matrix));
176 // Dark cell ratio = 5%
177 ByteMatrix matrix = new ByteMatrix(1, 2);
180 assertEquals(0, MaskUtil.applyMaskPenaltyRule4(matrix));
183 // Dark cell ratio = 66.67%
184 ByteMatrix matrix = new ByteMatrix(1, 6);
191 assertEquals(30, MaskUtil.applyMaskPenaltyRule4(matrix));
195 private static boolean TestGetDataMaskBitInternal(int maskPattern,
197 for (int x = 0; x < 6; ++x) {
198 for (int y = 0; y < 6; ++y) {
199 if (expected[y][x] !=
200 MaskUtil.getDataMaskBit(maskPattern, x, y)) {
208 // See mask patterns on the page 43 of JISX0510:2004.
209 public void testGetDataMaskBit() {
218 assertTrue(TestGetDataMaskBitInternal(0, mask0));
227 assertTrue(TestGetDataMaskBitInternal(1, mask1));
236 assertTrue(TestGetDataMaskBitInternal(2, mask2));
245 assertTrue(TestGetDataMaskBitInternal(3, mask3));
254 assertTrue(TestGetDataMaskBitInternal(4, mask4));
263 assertTrue(TestGetDataMaskBitInternal(5, mask5));
272 assertTrue(TestGetDataMaskBitInternal(6, mask6));
281 assertTrue(TestGetDataMaskBitInternal(7, mask7));