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authorDan Sinclair <dsinclair@chromium.org>2016-03-14 14:14:16 -0400
committerDan Sinclair <dsinclair@chromium.org>2016-03-14 14:14:16 -0400
commit1770c021cf998ff1b33855b1397f6ea8ff9f7cd7 (patch)
tree285e39abd4b5872d8cd632b9e331b0667fdc3eae /xfa/fxbarcode/qrcode/BC_QRDetector.cpp
parentf766ad219f66543654520f6a1955836f519e26d1 (diff)
downloadpdfium-1770c021cf998ff1b33855b1397f6ea8ff9f7cd7.tar.xz
Move xfa/src up to xfa/.
This CL moves the xfa/src files up to the xfa/ directory and fixes the includes, include guards, and build files. R=tsepez@chromium.org Review URL: https://codereview.chromium.org/1803723002 .
Diffstat (limited to 'xfa/fxbarcode/qrcode/BC_QRDetector.cpp')
-rw-r--r--xfa/fxbarcode/qrcode/BC_QRDetector.cpp278
1 files changed, 278 insertions, 0 deletions
diff --git a/xfa/fxbarcode/qrcode/BC_QRDetector.cpp b/xfa/fxbarcode/qrcode/BC_QRDetector.cpp
new file mode 100644
index 0000000000..030ee43c20
--- /dev/null
+++ b/xfa/fxbarcode/qrcode/BC_QRDetector.cpp
@@ -0,0 +1,278 @@
+// 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_QRDetector.h"
+
+#include <algorithm>
+#include <memory>
+
+#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_QRAlignmentPatternFinder.h"
+#include "xfa/fxbarcode/qrcode/BC_QRCoderVersion.h"
+#include "xfa/fxbarcode/qrcode/BC_QRDetectorResult.h"
+#include "xfa/fxbarcode/qrcode/BC_QRFinderPattern.h"
+#include "xfa/fxbarcode/qrcode/BC_QRFinderPatternFinder.h"
+#include "xfa/fxbarcode/qrcode/BC_QRGridSampler.h"
+
+CBC_QRDetector::CBC_QRDetector(CBC_CommonBitMatrix* image) : m_image(image) {}
+CBC_QRDetector::~CBC_QRDetector() {}
+CBC_QRDetectorResult* CBC_QRDetector::Detect(int32_t hints, int32_t& e) {
+ CBC_QRFinderPatternFinder finder(m_image);
+ std::unique_ptr<CBC_QRFinderPatternInfo> info(finder.Find(hints, e));
+ BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+ CBC_QRDetectorResult* qdr = ProcessFinderPatternInfo(info.get(), e);
+ BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+ return qdr;
+}
+CBC_QRDetectorResult* CBC_QRDetector::ProcessFinderPatternInfo(
+ CBC_QRFinderPatternInfo* info,
+ int32_t& e) {
+ std::unique_ptr<CBC_QRFinderPattern> topLeft(info->GetTopLeft());
+ std::unique_ptr<CBC_QRFinderPattern> topRight(info->GetTopRight());
+ std::unique_ptr<CBC_QRFinderPattern> bottomLeft(info->GetBottomLeft());
+ FX_FLOAT moduleSize =
+ CalculateModuleSize(topLeft.get(), topRight.get(), bottomLeft.get());
+ if (moduleSize < 1.0f) {
+ e = BCExceptionRead;
+ BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+ }
+ int32_t dimension = ComputeDimension(topLeft.get(), topRight.get(),
+ bottomLeft.get(), moduleSize, e);
+ BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+ CBC_QRCoderVersion* provisionalVersion =
+ CBC_QRCoderVersion::GetProvisionalVersionForDimension(dimension, e);
+ BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+ int32_t modulesBetweenFPCenters =
+ provisionalVersion->GetDimensionForVersion() - 7;
+ CBC_QRAlignmentPattern* alignmentPattern = NULL;
+ if (provisionalVersion->GetAlignmentPatternCenters()->GetSize() > 0) {
+ FX_FLOAT bottomRightX =
+ topRight->GetX() - topLeft->GetX() + bottomLeft->GetX();
+ FX_FLOAT bottomRightY =
+ topRight->GetY() - topLeft->GetY() + bottomLeft->GetY();
+ FX_FLOAT correctionToTopLeft =
+ 1.0f - 3.0f / (FX_FLOAT)modulesBetweenFPCenters;
+ FX_FLOAT xtemp = (topLeft->GetX() +
+ correctionToTopLeft * (bottomRightX - topLeft->GetX()));
+ int32_t estAlignmentX = (int32_t)xtemp;
+ FX_FLOAT ytemp = (topLeft->GetY() +
+ correctionToTopLeft * (bottomRightY - topLeft->GetY()));
+ int32_t estAlignmentY = (int32_t)ytemp;
+ for (int32_t i = 4; i <= 16; i <<= 1) {
+ CBC_QRAlignmentPattern* temp = FindAlignmentInRegion(
+ moduleSize, estAlignmentX, estAlignmentY, (FX_FLOAT)i, e);
+ alignmentPattern = temp;
+ break;
+ }
+ }
+ CBC_CommonBitMatrix* bits =
+ SampleGrid(m_image, topLeft.get(), topRight.get(), bottomLeft.get(),
+ (CBC_ResultPoint*)(alignmentPattern), dimension, e);
+ BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+ CFX_PtrArray* points = new CFX_PtrArray;
+ if (alignmentPattern == NULL) {
+ points->Add(bottomLeft.release());
+ points->Add(topLeft.release());
+ points->Add(topRight.release());
+ } else {
+ points->Add(bottomLeft.release());
+ points->Add(topLeft.release());
+ points->Add(topRight.release());
+ points->Add(alignmentPattern);
+ }
+ return new CBC_QRDetectorResult(bits, points);
+}
+CBC_CommonBitMatrix* CBC_QRDetector::SampleGrid(
+ CBC_CommonBitMatrix* image,
+ CBC_ResultPoint* topLeft,
+ CBC_ResultPoint* topRight,
+ CBC_ResultPoint* bottomLeft,
+ CBC_ResultPoint* alignmentPattern,
+ int32_t dimension,
+ int32_t& e) {
+ FX_FLOAT dimMinusThree = (FX_FLOAT)dimension - 3.5f;
+ FX_FLOAT bottomRightX;
+ FX_FLOAT bottomRightY;
+ FX_FLOAT sourceBottomRightX;
+ FX_FLOAT sourceBottomRightY;
+ if (alignmentPattern) {
+ bottomRightX = alignmentPattern->GetX();
+ bottomRightY = alignmentPattern->GetY();
+ sourceBottomRightX = sourceBottomRightY = dimMinusThree - 3.0f;
+ } else {
+ bottomRightX = (topRight->GetX() - topLeft->GetX()) + bottomLeft->GetX();
+ bottomRightY = (topRight->GetY() - topLeft->GetY()) + bottomLeft->GetY();
+ sourceBottomRightX = sourceBottomRightY = dimMinusThree;
+ }
+ CBC_QRGridSampler& sampler = CBC_QRGridSampler::GetInstance();
+ CBC_CommonBitMatrix* cbm = sampler.SampleGrid(
+ image, dimension, dimension, 3.5f, 3.5f, dimMinusThree, 3.5f,
+ sourceBottomRightX, sourceBottomRightY, 3.5f, dimMinusThree,
+ topLeft->GetX(), topLeft->GetY(), topRight->GetX(), topRight->GetY(),
+ bottomRightX, bottomRightY, bottomLeft->GetX(), bottomLeft->GetY(), e);
+ BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+ return cbm;
+}
+int32_t CBC_QRDetector::ComputeDimension(CBC_ResultPoint* topLeft,
+ CBC_ResultPoint* topRight,
+ CBC_ResultPoint* bottomLeft,
+ FX_FLOAT moduleSize,
+ int32_t& e) {
+ int32_t tltrCentersDimension = Round(
+ CBC_QRFinderPatternFinder::Distance(topLeft, topRight) / moduleSize);
+ int32_t tlblCentersDimension = Round(
+ CBC_QRFinderPatternFinder::Distance(topLeft, bottomLeft) / moduleSize);
+ int32_t dimension = ((tltrCentersDimension + tlblCentersDimension) >> 1) + 7;
+ switch (dimension & 0x03) {
+ case 0:
+ dimension++;
+ break;
+ case 2:
+ dimension--;
+ break;
+ case 3: {
+ e = BCExceptionRead;
+ BC_EXCEPTION_CHECK_ReturnValue(e, 0);
+ }
+ }
+ return dimension;
+}
+FX_FLOAT CBC_QRDetector::CalculateModuleSize(CBC_ResultPoint* topLeft,
+ CBC_ResultPoint* topRight,
+ CBC_ResultPoint* bottomLeft) {
+ return (CalculateModuleSizeOneWay(topLeft, topRight) +
+ CalculateModuleSizeOneWay(topLeft, bottomLeft)) /
+ 2.0f;
+}
+FX_FLOAT CBC_QRDetector::CalculateModuleSizeOneWay(
+ CBC_ResultPoint* pattern,
+ CBC_ResultPoint* otherPattern) {
+ FX_FLOAT moduleSizeEst1 = SizeOfBlackWhiteBlackRunBothWays(
+ (int32_t)pattern->GetX(), (int32_t)pattern->GetY(),
+ (int32_t)otherPattern->GetX(), (int32_t)otherPattern->GetY());
+ FX_FLOAT moduleSizeEst2 = SizeOfBlackWhiteBlackRunBothWays(
+ (int32_t)otherPattern->GetX(), (int32_t)otherPattern->GetY(),
+ (int32_t)pattern->GetX(), (int32_t)pattern->GetY());
+ if (FXSYS_isnan(moduleSizeEst1)) {
+ return moduleSizeEst2;
+ }
+ if (FXSYS_isnan(moduleSizeEst2)) {
+ return moduleSizeEst1;
+ }
+ return (moduleSizeEst1 + moduleSizeEst2) / 14.0f;
+}
+int32_t CBC_QRDetector::Round(FX_FLOAT d) {
+ return (int32_t)(d + 0.5f);
+}
+FX_FLOAT CBC_QRDetector::SizeOfBlackWhiteBlackRunBothWays(int32_t fromX,
+ int32_t fromY,
+ int32_t toX,
+ int32_t toY) {
+ FX_FLOAT result = SizeOfBlackWhiteBlackRun(fromX, fromY, toX, toY);
+ int32_t otherToX = fromX - (toX - fromX);
+ if (otherToX < 0) {
+ otherToX = -1;
+ } else if (otherToX >= m_image->GetWidth()) {
+ otherToX = m_image->GetWidth();
+ }
+ int32_t otherToY = fromY - (toY - fromY);
+ if (otherToY < 0) {
+ otherToY = -1;
+ } else if (otherToY >= m_image->GetHeight()) {
+ otherToY = m_image->GetHeight();
+ }
+ result += SizeOfBlackWhiteBlackRun(fromX, fromY, otherToX, otherToY);
+ return result - 1.0f;
+}
+FX_FLOAT CBC_QRDetector::SizeOfBlackWhiteBlackRun(int32_t fromX,
+ int32_t fromY,
+ int32_t toX,
+ int32_t toY) {
+ FX_BOOL steep = FXSYS_abs(toY - fromY) > FXSYS_abs(toX - fromX);
+ if (steep) {
+ int32_t temp = fromX;
+ fromX = fromY;
+ fromY = temp;
+ temp = toX;
+ toX = toY;
+ toY = temp;
+ }
+ int32_t dx = FXSYS_abs(toX - fromX);
+ int32_t dy = FXSYS_abs(toY - fromY);
+ int32_t error = -dx >> 1;
+ int32_t ystep = fromY < toY ? 1 : -1;
+ int32_t xstep = fromX < toX ? 1 : -1;
+ int32_t state = 0;
+ for (int32_t x = fromX, y = fromY; x != toX; x += xstep) {
+ int32_t realX = steep ? y : x;
+ int32_t realY = steep ? x : y;
+ if (state == 1) {
+ if (m_image->Get(realX, realY)) {
+ state++;
+ }
+ } else {
+ if (!m_image->Get(realX, realY)) {
+ state++;
+ }
+ }
+ if (state == 3) {
+ int32_t diffX = x - fromX;
+ int32_t diffY = y - fromY;
+ return (FX_FLOAT)sqrt((double)(diffX * diffX + diffY * diffY));
+ }
+ error += dy;
+ if (error > 0) {
+ y += ystep;
+ error -= dx;
+ }
+ }
+ int32_t diffX = toX - fromX;
+ int32_t diffY = toY - fromY;
+ return (FX_FLOAT)sqrt((double)(diffX * diffX + diffY * diffY));
+}
+CBC_QRAlignmentPattern* CBC_QRDetector::FindAlignmentInRegion(
+ FX_FLOAT overallEstModuleSize,
+ int32_t estAlignmentX,
+ int32_t estAlignmentY,
+ FX_FLOAT allowanceFactor,
+ int32_t& e) {
+ int32_t allowance = (int32_t)(allowanceFactor * overallEstModuleSize);
+ int32_t alignmentAreaLeftX = std::max(0, estAlignmentX - allowance);
+ int32_t alignmentAreaRightX =
+ std::min(m_image->GetWidth() - 1, estAlignmentX + allowance);
+ if (alignmentAreaRightX - alignmentAreaLeftX < overallEstModuleSize * 3) {
+ e = BCExceptionRead;
+ BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+ }
+ int32_t alignmentAreaTopY = std::max(0, estAlignmentY - allowance);
+ int32_t alignmentAreaBottomY =
+ std::min(m_image->GetHeight() - 1, estAlignmentY + allowance);
+ CBC_QRAlignmentPatternFinder alignmentFinder(
+ m_image, alignmentAreaLeftX, alignmentAreaTopY,
+ alignmentAreaRightX - alignmentAreaLeftX,
+ alignmentAreaBottomY - alignmentAreaTopY, overallEstModuleSize);
+ CBC_QRAlignmentPattern* qap = alignmentFinder.Find(e);
+ BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+ return qap;
+}