/*
* Copyright 2008 ZXing authors
*
* 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.
*/
package ntu.com.google.zxing.qrcode.encoder;
import org.junit.Assert;
import org.junit.Test;
/**
* @author satorux@google.com (Satoru Takabayashi) - creator
* @author mysen@google.com (Chris Mysen) - ported from C++
*/
public final class MaskUtilTestCase extends Assert {
@Test
public void testApplyMaskPenaltyRule1() {
{
ByteMatrix matrix = new ByteMatrix(4, 1);
matrix.set(0, 0, 0);
matrix.set(1, 0, 0);
matrix.set(2, 0, 0);
matrix.set(3, 0, 0);
assertEquals(0, MaskUtil.applyMaskPenaltyRule1(matrix));
}
{ // Horizontal.
ByteMatrix matrix = new ByteMatrix(6, 1);
matrix.set(0, 0, 0);
matrix.set(1, 0, 0);
matrix.set(2, 0, 0);
matrix.set(3, 0, 0);
matrix.set(4, 0, 0);
matrix.set(5, 0, 1);
assertEquals(3, MaskUtil.applyMaskPenaltyRule1(matrix));
matrix.set(5, 0, 0);
assertEquals(4, MaskUtil.applyMaskPenaltyRule1(matrix));
}
{ // Vertical.
ByteMatrix matrix = new ByteMatrix(1, 6);
matrix.set(0, 0, 0);
matrix.set(0, 1, 0);
matrix.set(0, 2, 0);
matrix.set(0, 3, 0);
matrix.set(0, 4, 0);
matrix.set(0, 5, 1);
assertEquals(3, MaskUtil.applyMaskPenaltyRule1(matrix));
matrix.set(0, 5, 0);
assertEquals(4, MaskUtil.applyMaskPenaltyRule1(matrix));
}
}
@Test
public void testApplyMaskPenaltyRule2() {
{
ByteMatrix matrix = new ByteMatrix(1, 1);
matrix.set(0, 0, 0);
assertEquals(0, MaskUtil.applyMaskPenaltyRule2(matrix));
}
{
ByteMatrix matrix = new ByteMatrix(2, 2);
matrix.set(0, 0, 0);
matrix.set(1, 0, 0);
matrix.set(0, 1, 0);
matrix.set(1, 1, 1);
assertEquals(0, MaskUtil.applyMaskPenaltyRule2(matrix));
}
{
ByteMatrix matrix = new ByteMatrix(2, 2);
matrix.set(0, 0, 0);
matrix.set(1, 0, 0);
matrix.set(0, 1, 0);
matrix.set(1, 1, 0);
assertEquals(3, MaskUtil.applyMaskPenaltyRule2(matrix));
}
{
ByteMatrix matrix = new ByteMatrix(3, 3);
matrix.set(0, 0, 0);
matrix.set(1, 0, 0);
matrix.set(2, 0, 0);
matrix.set(0, 1, 0);
matrix.set(1, 1, 0);
matrix.set(2, 1, 0);
matrix.set(0, 2, 0);
matrix.set(1, 2, 0);
matrix.set(2, 2, 0);
// Four instances of 2x2 blocks.
assertEquals(3 * 4, MaskUtil.applyMaskPenaltyRule2(matrix));
}
}
@Test
public void testApplyMaskPenaltyRule3() {
{
// Horizontal 00001011101.
ByteMatrix matrix = new ByteMatrix(11, 1);
matrix.set(0, 0, 0);
matrix.set(1, 0, 0);
matrix.set(2, 0, 0);
matrix.set(3, 0, 0);
matrix.set(4, 0, 1);
matrix.set(5, 0, 0);
matrix.set(6, 0, 1);
matrix.set(7, 0, 1);
matrix.set(8, 0, 1);
matrix.set(9, 0, 0);
matrix.set(10, 0, 1);
assertEquals(40, MaskUtil.applyMaskPenaltyRule3(matrix));
}
{
// Horizontal 10111010000.
ByteMatrix matrix = new ByteMatrix(11, 1);
matrix.set(0, 0, 1);
matrix.set(1, 0, 0);
matrix.set(2, 0, 1);
matrix.set(3, 0, 1);
matrix.set(4, 0, 1);
matrix.set(5, 0, 0);
matrix.set(6, 0, 1);
matrix.set(7, 0, 0);
matrix.set(8, 0, 0);
matrix.set(9, 0, 0);
matrix.set(10, 0, 0);
assertEquals(40, MaskUtil.applyMaskPenaltyRule3(matrix));
}
{
// Vertical 00001011101.
ByteMatrix matrix = new ByteMatrix(1, 11);
matrix.set(0, 0, 0);
matrix.set(0, 1, 0);
matrix.set(0, 2, 0);
matrix.set(0, 3, 0);
matrix.set(0, 4, 1);
matrix.set(0, 5, 0);
matrix.set(0, 6, 1);
matrix.set(0, 7, 1);
matrix.set(0, 8, 1);
matrix.set(0, 9, 0);
matrix.set(0, 10, 1);
assertEquals(40, MaskUtil.applyMaskPenaltyRule3(matrix));
}
{
// Vertical 10111010000.
ByteMatrix matrix = new ByteMatrix(1, 11);
matrix.set(0, 0, 1);
matrix.set(0, 1, 0);
matrix.set(0, 2, 1);
matrix.set(0, 3, 1);
matrix.set(0, 4, 1);
matrix.set(0, 5, 0);
matrix.set(0, 6, 1);
matrix.set(0, 7, 0);
matrix.set(0, 8, 0);
matrix.set(0, 9, 0);
matrix.set(0, 10, 0);
assertEquals(40, MaskUtil.applyMaskPenaltyRule3(matrix));
}
}
@Test
public void testApplyMaskPenaltyRule4() {
{
// Dark cell ratio = 0%
ByteMatrix matrix = new ByteMatrix(1, 1);
matrix.set(0, 0, 0);
assertEquals(100, MaskUtil.applyMaskPenaltyRule4(matrix));
}
{
// Dark cell ratio = 5%
ByteMatrix matrix = new ByteMatrix(2, 1);
matrix.set(0, 0, 0);
matrix.set(0, 0, 1);
assertEquals(0, MaskUtil.applyMaskPenaltyRule4(matrix));
}
{
// Dark cell ratio = 66.67%
ByteMatrix matrix = new ByteMatrix(6, 1);
matrix.set(0, 0, 0);
matrix.set(1, 0, 1);
matrix.set(2, 0, 1);
matrix.set(3, 0, 1);
matrix.set(4, 0, 1);
matrix.set(5, 0, 0);
assertEquals(30, MaskUtil.applyMaskPenaltyRule4(matrix));
}
}
private static boolean TestGetDataMaskBitInternal(int maskPattern,
int[][] expected) {
for (int x = 0; x < 6; ++x) {
for (int y = 0; y < 6; ++y) {
if ((expected[y][x] == 1) !=
MaskUtil.getDataMaskBit(maskPattern, x, y)) {
return false;
}
}
}
return true;
}
// See mask patterns on the page 43 of JISX0510:2004.
@Test
public void testGetDataMaskBit() {
int[][] mask0 = {
{1, 0, 1, 0, 1, 0},
{0, 1, 0, 1, 0, 1},
{1, 0, 1, 0, 1, 0},
{0, 1, 0, 1, 0, 1},
{1, 0, 1, 0, 1, 0},
{0, 1, 0, 1, 0, 1},
};
assertTrue(TestGetDataMaskBitInternal(0, mask0));
int[][] mask1 = {
{1, 1, 1, 1, 1, 1},
{0, 0, 0, 0, 0, 0},
{1, 1, 1, 1, 1, 1},
{0, 0, 0, 0, 0, 0},
{1, 1, 1, 1, 1, 1},
{0, 0, 0, 0, 0, 0},
};
assertTrue(TestGetDataMaskBitInternal(1, mask1));
int[][] mask2 = {
{1, 0, 0, 1, 0, 0},
{1, 0, 0, 1, 0, 0},
{1, 0, 0, 1, 0, 0},
{1, 0, 0, 1, 0, 0},
{1, 0, 0, 1, 0, 0},
{1, 0, 0, 1, 0, 0},
};
assertTrue(TestGetDataMaskBitInternal(2, mask2));
int[][] mask3 = {
{1, 0, 0, 1, 0, 0},
{0, 0, 1, 0, 0, 1},
{0, 1, 0, 0, 1, 0},
{1, 0, 0, 1, 0, 0},
{0, 0, 1, 0, 0, 1},
{0, 1, 0, 0, 1, 0},
};
assertTrue(TestGetDataMaskBitInternal(3, mask3));
int[][] mask4 = {
{1, 1, 1, 0, 0, 0},
{1, 1, 1, 0, 0, 0},
{0, 0, 0, 1, 1, 1},
{0, 0, 0, 1, 1, 1},
{1, 1, 1, 0, 0, 0},
{1, 1, 1, 0, 0, 0},
};
assertTrue(TestGetDataMaskBitInternal(4, mask4));
int[][] mask5 = {
{1, 1, 1, 1, 1, 1},
{1, 0, 0, 0, 0, 0},
{1, 0, 0, 1, 0, 0},
{1, 0, 1, 0, 1, 0},
{1, 0, 0, 1, 0, 0},
{1, 0, 0, 0, 0, 0},
};
assertTrue(TestGetDataMaskBitInternal(5, mask5));
int[][] mask6 = {
{1, 1, 1, 1, 1, 1},
{1, 1, 1, 0, 0, 0},
{1, 1, 0, 1, 1, 0},
{1, 0, 1, 0, 1, 0},
{1, 0, 1, 1, 0, 1},
{1, 0, 0, 0, 1, 1},
};
assertTrue(TestGetDataMaskBitInternal(6, mask6));
int[][] mask7 = {
{1, 0, 1, 0, 1, 0},
{0, 0, 0, 1, 1, 1},
{1, 0, 0, 0, 1, 1},
{0, 1, 0, 1, 0, 1},
{1, 1, 1, 0, 0, 0},
{0, 1, 1, 1, 0, 0},
};
assertTrue(TestGetDataMaskBitInternal(7, mask7));
}
}