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 org.junit.Assert;
20 import org.junit.Test;
23 * @author satorux@google.com (Satoru Takabayashi) - creator
24 * @author mysen@google.com (Chris Mysen) - ported from C++
27 public final class MaskUtilTestCase extends Assert {
30 public void testApplyMaskPenaltyRule1() {
32 ByteMatrix matrix = new ByteMatrix(4, 1);
37 assertEquals(0, MaskUtil.applyMaskPenaltyRule1(matrix));
40 ByteMatrix matrix = new ByteMatrix(6, 1);
47 assertEquals(3, MaskUtil.applyMaskPenaltyRule1(matrix));
49 assertEquals(4, MaskUtil.applyMaskPenaltyRule1(matrix));
52 ByteMatrix matrix = new ByteMatrix(1, 6);
59 assertEquals(3, MaskUtil.applyMaskPenaltyRule1(matrix));
61 assertEquals(4, MaskUtil.applyMaskPenaltyRule1(matrix));
66 public void testApplyMaskPenaltyRule2() {
68 ByteMatrix matrix = new ByteMatrix(1, 1);
70 assertEquals(0, MaskUtil.applyMaskPenaltyRule2(matrix));
73 ByteMatrix matrix = new ByteMatrix(2, 2);
78 assertEquals(0, MaskUtil.applyMaskPenaltyRule2(matrix));
81 ByteMatrix matrix = new ByteMatrix(2, 2);
86 assertEquals(3, MaskUtil.applyMaskPenaltyRule2(matrix));
89 ByteMatrix matrix = new ByteMatrix(3, 3);
99 // Four instances of 2x2 blocks.
100 assertEquals(3 * 4, MaskUtil.applyMaskPenaltyRule2(matrix));
105 public void testApplyMaskPenaltyRule3() {
107 // Horizontal 00001011101.
108 ByteMatrix matrix = new ByteMatrix(11, 1);
119 matrix.set(10, 0, 1);
120 assertEquals(40, MaskUtil.applyMaskPenaltyRule3(matrix));
123 // Horizontal 10111010000.
124 ByteMatrix matrix = new ByteMatrix(11, 1);
135 matrix.set(10, 0, 0);
136 assertEquals(40, MaskUtil.applyMaskPenaltyRule3(matrix));
139 // Vertical 00001011101.
140 ByteMatrix matrix = new ByteMatrix(1, 11);
151 matrix.set(0, 10, 1);
152 assertEquals(40, MaskUtil.applyMaskPenaltyRule3(matrix));
155 // Vertical 10111010000.
156 ByteMatrix matrix = new ByteMatrix(1, 11);
167 matrix.set(0, 10, 0);
168 assertEquals(40, MaskUtil.applyMaskPenaltyRule3(matrix));
173 public void testApplyMaskPenaltyRule4() {
175 // Dark cell ratio = 0%
176 ByteMatrix matrix = new ByteMatrix(1, 1);
178 assertEquals(100, MaskUtil.applyMaskPenaltyRule4(matrix));
181 // Dark cell ratio = 5%
182 ByteMatrix matrix = new ByteMatrix(2, 1);
185 assertEquals(0, MaskUtil.applyMaskPenaltyRule4(matrix));
188 // Dark cell ratio = 66.67%
189 ByteMatrix matrix = new ByteMatrix(6, 1);
196 assertEquals(30, MaskUtil.applyMaskPenaltyRule4(matrix));
200 private static boolean TestGetDataMaskBitInternal(int maskPattern,
202 for (int x = 0; x < 6; ++x) {
203 for (int y = 0; y < 6; ++y) {
204 if ((expected[y][x] == 1) !=
205 MaskUtil.getDataMaskBit(maskPattern, x, y)) {
213 // See mask patterns on the page 43 of JISX0510:2004.
215 public void testGetDataMaskBit() {
224 assertTrue(TestGetDataMaskBitInternal(0, mask0));
233 assertTrue(TestGetDataMaskBitInternal(1, mask1));
242 assertTrue(TestGetDataMaskBitInternal(2, mask2));
251 assertTrue(TestGetDataMaskBitInternal(3, mask3));
260 assertTrue(TestGetDataMaskBitInternal(4, mask4));
269 assertTrue(TestGetDataMaskBitInternal(5, mask5));
278 assertTrue(TestGetDataMaskBitInternal(6, mask6));
287 assertTrue(TestGetDataMaskBitInternal(7, mask7));