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 com.google.zxing.qrcode.encoder.MaskUtil;
21 import junit.framework.TestCase;
24 * @author satorux@google.com (Satoru Takabayashi) - creator
25 * @author mysen@google.com (Chris Mysen) - ported from C++
28 public final class MaskUtilTestCase extends TestCase {
29 public void testApplyMaskPenaltyRule1() {
31 ByteMatrix matrix = new ByteMatrix(1, 4);
36 assertEquals(0, MaskUtil.ApplyMaskPenaltyRule1(matrix));
39 ByteMatrix matrix = new ByteMatrix(1, 6);
46 assertEquals(3, MaskUtil.ApplyMaskPenaltyRule1(matrix));
48 assertEquals(4, MaskUtil.ApplyMaskPenaltyRule1(matrix));
51 ByteMatrix matrix = new ByteMatrix(6, 1);
58 assertEquals(3, MaskUtil.ApplyMaskPenaltyRule1(matrix));
60 assertEquals(4, MaskUtil.ApplyMaskPenaltyRule1(matrix));
64 public void testApplyMaskPenaltyRule2() {
66 ByteMatrix matrix = new ByteMatrix(1, 1);
68 assertEquals(0, MaskUtil.ApplyMaskPenaltyRule2(matrix));
71 ByteMatrix matrix = new ByteMatrix(2, 2);
76 assertEquals(0, MaskUtil.ApplyMaskPenaltyRule2(matrix));
79 ByteMatrix matrix = new ByteMatrix(2, 2);
84 assertEquals(3, MaskUtil.ApplyMaskPenaltyRule2(matrix));
87 ByteMatrix matrix = new ByteMatrix(3, 3);
97 // Four instances of 2x2 blocks.
98 assertEquals(3 * 4, MaskUtil.ApplyMaskPenaltyRule2(matrix));
102 public void testApplyMaskPenaltyRule3() {
104 // Horizontal 00001011101.
105 ByteMatrix matrix = new ByteMatrix(1, 11);
116 matrix.set(0, 10, 1);
117 assertEquals(40, MaskUtil.ApplyMaskPenaltyRule3(matrix));
120 // Horizontal 10111010000.
121 ByteMatrix matrix = new ByteMatrix(1, 11);
132 matrix.set(0, 10, 0);
133 assertEquals(40, MaskUtil.ApplyMaskPenaltyRule3(matrix));
136 // Vertical 00001011101.
137 ByteMatrix matrix = new ByteMatrix(11, 1);
148 matrix.set(10, 0, 1);
149 assertEquals(40, MaskUtil.ApplyMaskPenaltyRule3(matrix));
152 // Vertical 10111010000.
153 ByteMatrix matrix = new ByteMatrix(11, 1);
164 matrix.set(10, 0, 0);
165 assertEquals(40, MaskUtil.ApplyMaskPenaltyRule3(matrix));
169 public void testApplyMaskPenaltyRule4() {
171 // Dark cell ratio = 0%
172 ByteMatrix matrix = new ByteMatrix(1, 1);
174 assertEquals(100, MaskUtil.ApplyMaskPenaltyRule4(matrix));
177 // Dark cell ratio = 5%
178 ByteMatrix matrix = new ByteMatrix(1, 2);
181 assertEquals(0, MaskUtil.ApplyMaskPenaltyRule4(matrix));
184 // Dark cell ratio = 66.67%
185 ByteMatrix matrix = new ByteMatrix(1, 6);
192 assertEquals(30, MaskUtil.ApplyMaskPenaltyRule4(matrix));
196 private static boolean TestGetDataMaskBitInternal(int mask_pattern,
198 for (int x = 0; x < 6; ++x) {
199 for (int y = 0; y < 6; ++y) {
200 if (expected[y][x] !=
201 MaskUtil.GetDataMaskBit(mask_pattern, x, y)) {
209 // See mask patterns on the page 43 of JISX0510:2004.
210 public void testGetDataMaskBit() {
219 assertTrue(TestGetDataMaskBitInternal(0, mask0));
228 assertTrue(TestGetDataMaskBitInternal(1, mask1));
237 assertTrue(TestGetDataMaskBitInternal(2, mask2));
246 assertTrue(TestGetDataMaskBitInternal(3, mask3));
255 assertTrue(TestGetDataMaskBitInternal(4, mask4));
264 assertTrue(TestGetDataMaskBitInternal(5, mask5));
273 assertTrue(TestGetDataMaskBitInternal(6, mask6));
282 assertTrue(TestGetDataMaskBitInternal(7, mask7));