summaryrefslogtreecommitdiff
path: root/xfa/fxbarcode/qrcode/BC_QRCoderMaskUtil.cpp
blob: 4d845c4b07680d15f33d18f048b7a8bcf8335268 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
// Original code is licensed as follows:
/*
 * 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.
 */

#include "xfa/fxbarcode/common/BC_CommonByteMatrix.h"
#include "xfa/fxbarcode/qrcode/BC_QRCoder.h"
#include "xfa/fxbarcode/qrcode/BC_QRCoderErrorCorrectionLevel.h"
#include "xfa/fxbarcode/qrcode/BC_QRCoderMaskUtil.h"
#include "xfa/fxbarcode/utils.h"

CBC_QRCoderMaskUtil::CBC_QRCoderMaskUtil() {}
CBC_QRCoderMaskUtil::~CBC_QRCoderMaskUtil() {}
int32_t CBC_QRCoderMaskUtil::ApplyMaskPenaltyRule1(
    CBC_CommonByteMatrix* matrix) {
  return ApplyMaskPenaltyRule1Internal(matrix, TRUE) +
         ApplyMaskPenaltyRule1Internal(matrix, FALSE);
}

int32_t CBC_QRCoderMaskUtil::ApplyMaskPenaltyRule2(
    CBC_CommonByteMatrix* matrix) {
  int32_t penalty = 0;
  uint8_t* array = matrix->GetArray();
  int32_t width = matrix->GetWidth();
  int32_t height = matrix->GetHeight();
  for (int32_t y = 0; y < height - 1; y++) {
    for (int32_t x = 0; x < width - 1; x++) {
      int32_t value = array[y * width + x];
      if (value == array[y * width + x + 1] &&
          value == array[(y + 1) * width + x] &&
          value == array[(y + 1) * width + x + 1]) {
        penalty++;
      }
    }
  }
  return 3 * penalty;
}

int32_t CBC_QRCoderMaskUtil::ApplyMaskPenaltyRule3(
    CBC_CommonByteMatrix* matrix) {
  int32_t penalty = 0;
  uint8_t* array = matrix->GetArray();
  int32_t width = matrix->GetWidth();
  int32_t height = matrix->GetHeight();
  for (int32_t y = 0; y < height; ++y) {
    for (int32_t x = 0; x < width; ++x) {
      if (x == 0 &&
          ((y >= 0 && y <= 6) || (y >= height - 7 && y <= height - 1))) {
        continue;
      }
      if (x == width - 7 && (y >= 0 && y <= 6)) {
        continue;
      }
      if (y == 0 &&
          ((x >= 0 && x <= 6) || (x >= width - 7 && x <= width - 1))) {
        continue;
      }
      if (y == height - 7 && (x >= 0 && x <= 6)) {
        continue;
      }
      if (x + 6 < width && array[y * width + x] == 1 &&
          array[y * width + x + 1] == 0 && array[y * width + x + 2] == 1 &&
          array[y * width + x + 3] == 1 && array[y * width + x + 4] == 1 &&
          array[y * width + x + 5] == 0 && array[y * width + x + 6] == 1 &&
          ((x + 10 < width && array[y * width + x + 7] == 0 &&
            array[y * width + x + 8] == 0 && array[y * width + x + 9] == 0 &&
            array[y * width + x + 10] == 0) ||
           (x - 4 >= 0 && array[y * width + x - 1] == 0 &&
            array[y * width + x - 2] == 0 && array[y * width + x - 3] == 0 &&
            array[y * width + x - 4] == 0))) {
        penalty += 40;
      }
      if (y + 6 < height && array[y * width + x] == 1 &&
          array[(y + 1) * width + x] == 0 && array[(y + 2) * width + x] == 1 &&
          array[(y + 3) * width + x] == 1 && array[(y + 4) * width + x] == 1 &&
          array[(y + 5) * width + x] == 0 && array[(y + 6) * width + x] == 1 &&
          ((y + 10 < height && array[(y + 7) * width + x] == 0 &&
            array[(y + 8) * width + x] == 0 &&
            array[(y + 9) * width + x] == 0 &&
            array[(y + 10) * width + x] == 0) ||
           (y - 4 >= 0 && array[(y - 1) * width + x] == 0 &&
            array[(y - 2) * width + x] == 0 &&
            array[(y - 3) * width + x] == 0 &&
            array[(y - 4) * width + x] == 0))) {
        penalty += 40;
      }
    }
  }
  return penalty;
}
int32_t CBC_QRCoderMaskUtil::ApplyMaskPenaltyRule4(
    CBC_CommonByteMatrix* matrix) {
  int32_t numDarkCells = 0;
  uint8_t* array = matrix->GetArray();
  int32_t width = matrix->GetWidth();
  int32_t height = matrix->GetHeight();
  for (int32_t y = 0; y < height; ++y) {
    for (int32_t x = 0; x < width; ++x) {
      if (array[y * width + x] == 1) {
        numDarkCells += 1;
      }
    }
  }
  int32_t numTotalCells = matrix->GetHeight() * matrix->GetWidth();
  double darkRatio = (double)numDarkCells / numTotalCells;
  return abs((int32_t)(darkRatio * 100 - 50) / 5) * 5 * 10;
}
FX_BOOL CBC_QRCoderMaskUtil::GetDataMaskBit(int32_t maskPattern,
                                            int32_t x,
                                            int32_t y,
                                            int32_t& e) {
  if (!CBC_QRCoder::IsValidMaskPattern(maskPattern)) {
    e = (BCExceptionInvalidateMaskPattern);
    BC_EXCEPTION_CHECK_ReturnValue(e, FALSE);
  }
  int32_t intermediate = 0, temp = 0;
  switch (maskPattern) {
    case 0:
      intermediate = (y + x) & 0x1;
      break;
    case 1:
      intermediate = y & 0x1;
      break;
    case 2:
      intermediate = x % 3;
      break;
    case 3:
      intermediate = (y + x) % 3;
      break;
    case 4:
      intermediate = ((y >> 1) + (x / 3)) & 0x1;
      break;
    case 5:
      temp = y * x;
      intermediate = (temp & 0x1) + (temp % 3);
      break;
    case 6:
      temp = y * x;
      intermediate = (((temp & 0x1) + (temp % 3)) & 0x1);
      break;
    case 7:
      temp = y * x;
      intermediate = (((temp % 3) + ((y + x) & 0x1)) & 0x1);
      break;
    default: {
      e = BCExceptionInvalidateMaskPattern;
      BC_EXCEPTION_CHECK_ReturnValue(e, FALSE);
    }
  }
  return intermediate == 0;
}
int32_t CBC_QRCoderMaskUtil::ApplyMaskPenaltyRule1Internal(
    CBC_CommonByteMatrix* matrix,
    FX_BOOL isHorizontal) {
  int32_t penalty = 0;
  int32_t numSameBitCells = 0;
  int32_t prevBit = -1;
  int32_t width = matrix->GetWidth();
  int32_t height = matrix->GetHeight();
  int32_t iLimit = isHorizontal ? height : width;
  int32_t jLimit = isHorizontal ? width : height;
  uint8_t* array = matrix->GetArray();
  for (int32_t i = 0; i < iLimit; ++i) {
    for (int32_t j = 0; j < jLimit; ++j) {
      int32_t bit = isHorizontal ? array[i * width + j] : array[j * width + i];
      if (bit == prevBit) {
        numSameBitCells += 1;
        if (numSameBitCells == 5) {
          penalty += 3;
        } else if (numSameBitCells > 5) {
          penalty += 1;
        }
      } else {
        numSameBitCells = 1;
        prevBit = bit;
      }
    }
    numSameBitCells = 0;
  }
  return penalty;
}