summaryrefslogtreecommitdiff
path: root/xfa/fxbarcode/qrcode/BC_QRFinderPatternFinder.cpp
diff options
context:
space:
mode:
authordsinclair <dsinclair@chromium.org>2016-06-16 12:29:07 -0700
committerCommit bot <commit-bot@chromium.org>2016-06-16 12:29:07 -0700
commita26153440b46b3b37b7e81435debb296f22769f4 (patch)
tree37b3073d15af7ae2850b5a02be87123feb54a054 /xfa/fxbarcode/qrcode/BC_QRFinderPatternFinder.cpp
parent8320ee28f24615d1d619a5db1b7c235ea6f91dde (diff)
downloadpdfium-a26153440b46b3b37b7e81435debb296f22769f4.tar.xz
Remove barcode reading code.
We never read barcodes, we only write them. Remove code related to barcode reading. Review-Url: https://codereview.chromium.org/2071633002
Diffstat (limited to 'xfa/fxbarcode/qrcode/BC_QRFinderPatternFinder.cpp')
-rw-r--r--xfa/fxbarcode/qrcode/BC_QRFinderPatternFinder.cpp481
1 files changed, 0 insertions, 481 deletions
diff --git a/xfa/fxbarcode/qrcode/BC_QRFinderPatternFinder.cpp b/xfa/fxbarcode/qrcode/BC_QRFinderPatternFinder.cpp
deleted file mode 100644
index 5ceeefac53..0000000000
--- a/xfa/fxbarcode/qrcode/BC_QRFinderPatternFinder.cpp
+++ /dev/null
@@ -1,481 +0,0 @@
-// 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 2007 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/qrcode/BC_QRFinderPatternFinder.h"
-
-#include <memory>
-
-#include "core/fxcrt/include/fx_basic.h"
-#include "xfa/fxbarcode/BC_ResultPoint.h"
-#include "xfa/fxbarcode/common/BC_CommonBitMatrix.h"
-#include "xfa/fxbarcode/qrcode/BC_FinderPatternInfo.h"
-#include "xfa/fxbarcode/qrcode/BC_QRFinderPattern.h"
-#include "xfa/fxbarcode/utils.h"
-
-const int32_t CBC_QRFinderPatternFinder::CENTER_QUORUM = 2;
-const int32_t CBC_QRFinderPatternFinder::MIN_SKIP = 3;
-const int32_t CBC_QRFinderPatternFinder::MAX_MODULES = 57;
-const int32_t CBC_QRFinderPatternFinder::INTEGER_MATH_SHIFT = 8;
-
-CBC_QRFinderPatternFinder::CBC_QRFinderPatternFinder(
- CBC_CommonBitMatrix* image) {
- m_image = image;
- m_crossCheckStateCount.SetSize(5);
- m_hasSkipped = FALSE;
-}
-
-CBC_QRFinderPatternFinder::~CBC_QRFinderPatternFinder() {
- for (int32_t i = 0; i < m_possibleCenters.GetSize(); i++)
- delete m_possibleCenters[i];
-}
-
-class ClosestToAverageComparator {
- private:
- FX_FLOAT m_averageModuleSize;
-
- public:
- ClosestToAverageComparator(FX_FLOAT averageModuleSize)
- : m_averageModuleSize(averageModuleSize) {}
- int32_t operator()(FinderPattern* a, FinderPattern* b) {
- FX_FLOAT dA =
- (FX_FLOAT)fabs(a->GetEstimatedModuleSize() - m_averageModuleSize);
- FX_FLOAT dB =
- (FX_FLOAT)fabs(b->GetEstimatedModuleSize() - m_averageModuleSize);
- return dA < dB ? -1 : dA > dB ? 1 : 0;
- }
-};
-class CenterComparator {
- public:
- int32_t operator()(FinderPattern* a, FinderPattern* b) {
- return b->GetCount() - a->GetCount();
- }
-};
-CBC_CommonBitMatrix* CBC_QRFinderPatternFinder::GetImage() {
- return m_image;
-}
-CFX_Int32Array& CBC_QRFinderPatternFinder::GetCrossCheckStateCount() {
- m_crossCheckStateCount[0] = 0;
- m_crossCheckStateCount[1] = 0;
- m_crossCheckStateCount[2] = 0;
- m_crossCheckStateCount[3] = 0;
- m_crossCheckStateCount[4] = 0;
- return m_crossCheckStateCount;
-}
-
-CFX_ArrayTemplate<CBC_QRFinderPattern*>*
-CBC_QRFinderPatternFinder::GetPossibleCenters() {
- return &m_possibleCenters;
-}
-
-CBC_QRFinderPatternInfo* CBC_QRFinderPatternFinder::Find(int32_t hint,
- int32_t& e) {
- int32_t maxI = m_image->GetHeight();
- int32_t maxJ = m_image->GetWidth();
- int32_t iSkip = (3 * maxI) / (4 * MAX_MODULES);
- if (iSkip < MIN_SKIP || 0) {
- iSkip = MIN_SKIP;
- }
- FX_BOOL done = FALSE;
- CFX_Int32Array stateCount;
- stateCount.SetSize(5);
- for (int32_t i = iSkip - 1; i < maxI && !done; i += iSkip) {
- stateCount[0] = 0;
- stateCount[1] = 0;
- stateCount[2] = 0;
- stateCount[3] = 0;
- stateCount[4] = 0;
- int32_t currentState = 0;
- for (int32_t j = 0; j < maxJ; j++) {
- if (m_image->Get(j, i)) {
- if ((currentState & 1) == 1) {
- currentState++;
- }
- stateCount[currentState]++;
- } else {
- if ((currentState & 1) == 0) {
- if (currentState == 4) {
- if (FoundPatternCross(stateCount)) {
- FX_BOOL confirmed = HandlePossibleCenter(stateCount, i, j);
- if (confirmed) {
- iSkip = 2;
- if (m_hasSkipped) {
- done = HaveMultiplyConfirmedCenters();
- } else {
- int32_t rowSkip = FindRowSkip();
- if (rowSkip > stateCount[2]) {
- i += rowSkip - stateCount[2] - iSkip;
- j = maxJ - 1;
- }
- }
- } else {
- do {
- j++;
- } while (j < maxJ && !m_image->Get(j, i));
- j--;
- }
- currentState = 0;
- stateCount[0] = 0;
- stateCount[1] = 0;
- stateCount[2] = 0;
- stateCount[3] = 0;
- stateCount[4] = 0;
- } else {
- stateCount[0] = stateCount[2];
- stateCount[1] = stateCount[3];
- stateCount[2] = stateCount[4];
- stateCount[3] = 1;
- stateCount[4] = 0;
- currentState = 3;
- }
- } else {
- stateCount[++currentState]++;
- }
- } else {
- stateCount[currentState]++;
- }
- }
- }
- if (FoundPatternCross(stateCount)) {
- FX_BOOL confirmed = HandlePossibleCenter(stateCount, i, maxJ);
- if (confirmed) {
- iSkip = stateCount[0];
- if (m_hasSkipped) {
- done = HaveMultiplyConfirmedCenters();
- }
- }
- }
- }
- std::unique_ptr<CFX_ArrayTemplate<CBC_QRFinderPattern*>> patternInfo(
- SelectBestpatterns(e));
- BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
- OrderBestPatterns(patternInfo.get());
- return new CBC_QRFinderPatternInfo(patternInfo.get());
-}
-void CBC_QRFinderPatternFinder::OrderBestPatterns(
- CFX_ArrayTemplate<CBC_QRFinderPattern*>* patterns) {
- FX_FLOAT abDistance = Distance((*patterns)[0], (*patterns)[1]);
- FX_FLOAT bcDistance = Distance((*patterns)[1], (*patterns)[2]);
- FX_FLOAT acDistance = Distance((*patterns)[0], (*patterns)[2]);
- CBC_QRFinderPattern* topLeft;
- CBC_QRFinderPattern* topRight;
- CBC_QRFinderPattern* bottomLeft;
- if (bcDistance >= abDistance && bcDistance >= acDistance) {
- topLeft = (*patterns)[0];
- topRight = (*patterns)[1];
- bottomLeft = (*patterns)[2];
- } else if (acDistance >= bcDistance && acDistance >= abDistance) {
- topLeft = (*patterns)[1];
- topRight = (*patterns)[0];
- bottomLeft = (*patterns)[2];
- } else {
- topLeft = (*patterns)[2];
- topRight = (*patterns)[0];
- bottomLeft = (*patterns)[1];
- }
- if ((bottomLeft->GetY() - topLeft->GetY()) *
- (topRight->GetX() - topLeft->GetX()) <
- (bottomLeft->GetX() - topLeft->GetX()) *
- (topRight->GetY() - topLeft->GetY())) {
- CBC_QRFinderPattern* temp = topRight;
- topRight = bottomLeft;
- bottomLeft = temp;
- }
- (*patterns)[0] = bottomLeft;
- (*patterns)[1] = topLeft;
- (*patterns)[2] = topRight;
-}
-FX_FLOAT CBC_QRFinderPatternFinder::Distance(CBC_ResultPoint* point1,
- CBC_ResultPoint* point2) {
- FX_FLOAT dx = point1->GetX() - point2->GetX();
- FX_FLOAT dy = point1->GetY() - point2->GetY();
- return (FX_FLOAT)FXSYS_sqrt(dx * dx + dy * dy);
-}
-FX_FLOAT CBC_QRFinderPatternFinder::CenterFromEnd(
- const CFX_Int32Array& stateCount,
- int32_t end) {
- return (FX_FLOAT)(end - stateCount[4] - stateCount[3]) - stateCount[2] / 2.0f;
-}
-FX_BOOL CBC_QRFinderPatternFinder::FoundPatternCross(
- const CFX_Int32Array& stateCount) {
- int32_t totalModuleSize = 0;
- for (int32_t i = 0; i < 5; i++) {
- int32_t count = stateCount[i];
- if (count == 0) {
- return FALSE;
- }
- totalModuleSize += count;
- }
- if (totalModuleSize < 7) {
- return FALSE;
- }
- int32_t moduleSize = (totalModuleSize << INTEGER_MATH_SHIFT) / 7;
- int32_t maxVariance = moduleSize / 2;
- return FXSYS_abs(moduleSize - (stateCount[0] << INTEGER_MATH_SHIFT)) <
- maxVariance &&
- FXSYS_abs(moduleSize - (stateCount[1] << INTEGER_MATH_SHIFT)) <
- maxVariance &&
- FXSYS_abs(3 * moduleSize - (stateCount[2] << INTEGER_MATH_SHIFT)) <
- 3 * maxVariance &&
- FXSYS_abs(moduleSize - (stateCount[3] << INTEGER_MATH_SHIFT)) <
- maxVariance &&
- FXSYS_abs(moduleSize - (stateCount[4] << INTEGER_MATH_SHIFT)) <
- maxVariance;
-}
-FX_FLOAT CBC_QRFinderPatternFinder::CrossCheckVertical(
- int32_t startI,
- int32_t centerJ,
- int32_t maxCount,
- int32_t originalStateCountTotal) {
- CBC_CommonBitMatrix* image = m_image;
- int32_t maxI = image->GetHeight();
- CFX_Int32Array& stateCount = GetCrossCheckStateCount();
- int32_t i = startI;
- while (i >= 0 && image->Get(centerJ, i)) {
- stateCount[2]++;
- i--;
- }
- if (i < 0) {
- return FXSYS_nan();
- }
- while (i >= 0 && !image->Get(centerJ, i) && stateCount[1] <= maxCount) {
- stateCount[1]++;
- i--;
- }
- if (i < 0 || stateCount[1] > maxCount) {
- return FXSYS_nan();
- }
- while (i >= 0 && image->Get(centerJ, i) && stateCount[0] <= maxCount) {
- stateCount[0]++;
- i--;
- }
- if (stateCount[0] > maxCount) {
- return FXSYS_nan();
- }
- i = startI + 1;
- while (i < maxI && image->Get(centerJ, i)) {
- stateCount[2]++;
- i++;
- }
- if (i == maxI) {
- return FXSYS_nan();
- }
- while (i < maxI && !image->Get(centerJ, i) && stateCount[3] < maxCount) {
- stateCount[3]++;
- i++;
- }
- if (i == maxI || stateCount[3] >= maxCount) {
- return FXSYS_nan();
- }
- while (i < maxI && image->Get(centerJ, i) && stateCount[4] < maxCount) {
- stateCount[4]++;
- i++;
- }
- if (stateCount[4] >= maxCount) {
- return FXSYS_nan();
- }
- int32_t stateCountTotal = stateCount[0] + stateCount[1] + stateCount[2] +
- stateCount[3] + stateCount[4];
- if (5 * FXSYS_abs(stateCountTotal - originalStateCountTotal) >=
- originalStateCountTotal) {
- return FXSYS_nan();
- }
- return FoundPatternCross(stateCount) ? CenterFromEnd(stateCount, i)
- : FXSYS_nan();
-}
-FX_FLOAT CBC_QRFinderPatternFinder::CrossCheckHorizontal(
- int32_t startJ,
- int32_t centerI,
- int32_t maxCount,
- int32_t originalStateCountTotal) {
- CBC_CommonBitMatrix* image = m_image;
- int32_t maxJ = image->GetWidth();
- CFX_Int32Array& stateCount = GetCrossCheckStateCount();
- int32_t j = startJ;
- while (j >= 0 && image->Get(j, centerI)) {
- stateCount[2]++;
- j--;
- }
- if (j < 0) {
- return FXSYS_nan();
- }
- while (j >= 0 && !image->Get(j, centerI) && stateCount[1] <= maxCount) {
- stateCount[1]++;
- j--;
- }
- if (j < 0 || stateCount[1] > maxCount) {
- return FXSYS_nan();
- }
- while (j >= 0 && image->Get(j, centerI) && stateCount[0] <= maxCount) {
- stateCount[0]++;
- j--;
- }
- if (stateCount[0] > maxCount) {
- return FXSYS_nan();
- }
- j = startJ + 1;
- while (j < maxJ && image->Get(j, centerI)) {
- stateCount[2]++;
- j++;
- }
- if (j == maxJ) {
- return FXSYS_nan();
- }
- while (j < maxJ && !image->Get(j, centerI) && stateCount[3] < maxCount) {
- stateCount[3]++;
- j++;
- }
- if (j == maxJ || stateCount[3] >= maxCount) {
- return FXSYS_nan();
- }
- while (j < maxJ && image->Get(j, centerI) && stateCount[4] < maxCount) {
- stateCount[4]++;
- j++;
- }
- if (stateCount[4] >= maxCount) {
- return FXSYS_nan();
- }
- int32_t stateCountTotal = stateCount[0] + stateCount[1] + stateCount[2] +
- stateCount[3] + stateCount[4];
- if (5 * FXSYS_abs(stateCountTotal - originalStateCountTotal) >=
- originalStateCountTotal) {
- return FXSYS_nan();
- }
- return FoundPatternCross(stateCount) ? CenterFromEnd(stateCount, j)
- : FXSYS_nan();
-}
-FX_BOOL CBC_QRFinderPatternFinder::HandlePossibleCenter(
- const CFX_Int32Array& stateCount,
- int32_t i,
- int32_t j) {
- int32_t stateCountTotal = stateCount[0] + stateCount[1] + stateCount[2] +
- stateCount[3] + stateCount[4];
- FX_FLOAT centerJ = CenterFromEnd(stateCount, j);
- FX_FLOAT centerI =
- CrossCheckVertical(i, (int32_t)centerJ, stateCount[2], stateCountTotal);
- if (!FXSYS_isnan(centerI)) {
- centerJ = CrossCheckHorizontal((int32_t)centerJ, (int32_t)centerI,
- stateCount[2], stateCountTotal);
- if (!FXSYS_isnan(centerJ)) {
- FX_FLOAT estimatedModuleSize = (FX_FLOAT)stateCountTotal / 7.0f;
- FX_BOOL found = FALSE;
- int32_t max = m_possibleCenters.GetSize();
- for (int32_t index = 0; index < max; index++) {
- CBC_QRFinderPattern* center = m_possibleCenters[index];
- if (center->AboutEquals(estimatedModuleSize, centerI, centerJ)) {
- center->IncrementCount();
- found = TRUE;
- break;
- }
- }
- if (!found) {
- m_possibleCenters.Add(
- new CBC_QRFinderPattern(centerJ, centerI, estimatedModuleSize));
- }
- return TRUE;
- }
- }
- return FALSE;
-}
-int32_t CBC_QRFinderPatternFinder::FindRowSkip() {
- int32_t max = m_possibleCenters.GetSize();
- if (max <= 1) {
- return 0;
- }
- FinderPattern* firstConfirmedCenter = nullptr;
- for (int32_t i = 0; i < max; i++) {
- CBC_QRFinderPattern* center = m_possibleCenters[i];
- if (center->GetCount() >= CENTER_QUORUM) {
- if (firstConfirmedCenter) {
- m_hasSkipped = TRUE;
- return (int32_t)((fabs(firstConfirmedCenter->GetX() - center->GetX()) -
- fabs(firstConfirmedCenter->GetY() - center->GetY())) /
- 2);
- }
- firstConfirmedCenter = center;
- }
- }
- return 0;
-}
-FX_BOOL CBC_QRFinderPatternFinder::HaveMultiplyConfirmedCenters() {
- int32_t confirmedCount = 0;
- FX_FLOAT totalModuleSize = 0.0f;
- int32_t max = m_possibleCenters.GetSize();
- int32_t i;
- for (i = 0; i < max; i++) {
- CBC_QRFinderPattern* pattern = m_possibleCenters[i];
- if (pattern->GetCount() >= CENTER_QUORUM) {
- confirmedCount++;
- totalModuleSize += pattern->GetEstimatedModuleSize();
- }
- }
- if (confirmedCount < 3) {
- return FALSE;
- }
- FX_FLOAT average = totalModuleSize / (FX_FLOAT)max;
- FX_FLOAT totalDeviation = 0.0f;
- for (i = 0; i < max; i++) {
- CBC_QRFinderPattern* pattern = m_possibleCenters[i];
- totalDeviation += fabs(pattern->GetEstimatedModuleSize() - average);
- }
- return totalDeviation <= 0.05f * totalModuleSize;
-}
-
-CFX_ArrayTemplate<CBC_QRFinderPattern*>*
-CBC_QRFinderPatternFinder::SelectBestpatterns(int32_t& e) {
- int32_t startSize = m_possibleCenters.GetSize();
- if (m_possibleCenters.GetSize() < 3) {
- e = BCExceptionRead;
- BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
- }
- FX_FLOAT average = 0.0f;
- if (startSize > 3) {
- FX_FLOAT totalModuleSize = 0.0f;
- for (int32_t i = 0; i < startSize; i++)
- totalModuleSize += m_possibleCenters[i]->GetEstimatedModuleSize();
-
- average = totalModuleSize / (FX_FLOAT)startSize;
- for (int32_t j = 0;
- j < m_possibleCenters.GetSize() && m_possibleCenters.GetSize() > 3;
- j++) {
- CBC_QRFinderPattern* pattern = m_possibleCenters[j];
- if (fabs(pattern->GetEstimatedModuleSize() - average) > 0.2f * average) {
- delete pattern;
- m_possibleCenters.RemoveAt(j);
- j--;
- }
- }
- }
- if (m_possibleCenters.GetSize() > 3) {
- std::sort(m_possibleCenters.GetData(),
- m_possibleCenters.GetData() + m_possibleCenters.GetSize(),
- [](const CBC_QRFinderPattern* a, CBC_QRFinderPattern* b) {
- return a->GetCount() > b->GetCount(); // e.g. Descending.
- });
- }
- CFX_ArrayTemplate<CBC_QRFinderPattern*>* vec =
- new CFX_ArrayTemplate<CBC_QRFinderPattern*>();
- vec->SetSize(3);
- (*vec)[0] = m_possibleCenters[0]->Clone();
- (*vec)[1] = m_possibleCenters[1]->Clone();
- (*vec)[2] = m_possibleCenters[2]->Clone();
- return vec;
-}