Organize barcode codes into modules.

Previously all the files in barcode are lumped together.
The naming of some files are inconsistent,
leading to difficult understanding of the structure.
Now files are grouped based on different barcode type like in zxing.
This also matches what it looks like in other xfa folders.
The file names in each folder could be further modified to be consistent.

R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/842043002

1 files changed, 264 insertions, 0 deletions

diff --git a/xfa/src/fxbarcode/qrcode/BC_QRDetector.cpp b/xfa/src/fxbarcode/qrcode/BC_QRDetector.cpp
new file mode 100644
index 0000000000..01d90832b9
--- /dev/null
+++ b/xfa/src/fxbarcode/qrcode/BC_QRDetector.cpp
@@ -0,0 +1,264 @@
+// 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 "../barcode.h"

+#include "../common/BC_CommonBitMatrix.h"

+#include "../BC_ResultPoint.h"

+#include "BC_QRFinderPattern.h"

+#include "BC_QRCoderVersion.h"

+#include "BC_FinderPatternInfo.h"

+#include "BC_QRGridSampler.h"

+#include "BC_QRAlignmentPatternFinder.h"

+#include "BC_QRFinderPatternFinder.h"

+#include "BC_QRDetectorResult.h"

+#include "BC_QRDetector.h"

+CBC_QRDetector::CBC_QRDetector(CBC_CommonBitMatrix *image): m_image(image)

+{

+}

+CBC_QRDetector::~CBC_QRDetector()

+{

+}

+CBC_QRDetectorResult *CBC_QRDetector::Detect(FX_INT32 hints, FX_INT32 &e)

+{

+    CBC_QRFinderPatternFinder finder(m_image);

+    CBC_QRFinderPatternInfo* qpi = finder.Find(hints, e);

+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+    CBC_AutoPtr<CBC_QRFinderPatternInfo> info(qpi);

+    CBC_QRDetectorResult* qdr = ProcessFinderPatternInfo(info.get(), e);

+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+    return qdr;

+}

+CBC_QRDetectorResult* CBC_QRDetector::ProcessFinderPatternInfo(CBC_QRFinderPatternInfo *info, FX_INT32 &e)

+{

+    CBC_AutoPtr<CBC_QRFinderPattern> topLeft(info->GetTopLeft());

+    CBC_AutoPtr<CBC_QRFinderPattern> topRight(info->GetTopRight());

+    CBC_AutoPtr<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);

+    }

+    FX_INT32 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);

+    FX_INT32 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()));

+        FX_INT32 estAlignmentX = (FX_INT32)xtemp ;

+        FX_FLOAT ytemp =  (topLeft->GetY() + correctionToTopLeft * (bottomRightY - topLeft->GetY()));

+        FX_INT32 estAlignmentY = (FX_INT32)ytemp;

+        for(FX_INT32 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 = FX_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 FX_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,

+        FX_INT32 dimension, FX_INT32 &e)

+{

+    FX_FLOAT dimMinusThree = (FX_FLOAT) dimension - 3.5f;

+    FX_FLOAT bottomRightX;

+    FX_FLOAT bottomRightY;

+    FX_FLOAT sourceBottomRightX;

+    FX_FLOAT sourceBottomRightY;

+    if (alignmentPattern != NULL) {

+        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;

+}

+FX_INT32 CBC_QRDetector::ComputeDimension(CBC_ResultPoint *topLeft, CBC_ResultPoint *topRight,

+        CBC_ResultPoint *bottomLeft, FX_FLOAT moduleSize, FX_INT32 &e)

+{

+    FX_INT32 tltrCentersDimension = Round(CBC_QRFinderPatternFinder::Distance(topLeft, topRight) / moduleSize);

+    FX_INT32 tlblCentersDimension = Round(CBC_QRFinderPatternFinder::Distance(topLeft, bottomLeft) / moduleSize);

+    FX_INT32 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((FX_INT32) pattern->GetX(),

+                              (FX_INT32) pattern->GetY(),

+                              (FX_INT32) otherPattern->GetX(),

+                              (FX_INT32) otherPattern->GetY());

+    FX_FLOAT moduleSizeEst2 = SizeOfBlackWhiteBlackRunBothWays((FX_INT32) otherPattern->GetX(),

+                              (FX_INT32) otherPattern->GetY(),

+                              (FX_INT32) pattern->GetX(),

+                              (FX_INT32) pattern->GetY());

+    if (FXSYS_isnan(moduleSizeEst1)) {

+        return moduleSizeEst2;

+    }

+    if (FXSYS_isnan(moduleSizeEst2)) {

+        return moduleSizeEst1;

+    }

+    return (moduleSizeEst1 + moduleSizeEst2) / 14.0f;

+}

+FX_INT32 CBC_QRDetector::Round(FX_FLOAT d)

+{

+    return (FX_INT32)(d + 0.5f);

+}

+FX_FLOAT CBC_QRDetector::SizeOfBlackWhiteBlackRunBothWays(FX_INT32 fromX, FX_INT32 fromY, FX_INT32 toX, FX_INT32 toY)

+{

+    FX_FLOAT result = SizeOfBlackWhiteBlackRun(fromX, fromY, toX, toY);

+    FX_INT32 otherToX = fromX - (toX - fromX);

+    if (otherToX < 0) {

+        otherToX = -1;

+    } else if (otherToX >= m_image->GetWidth()) {

+        otherToX = m_image->GetWidth();

+    }

+    FX_INT32 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(FX_INT32 fromX, FX_INT32 fromY, FX_INT32 toX, FX_INT32 toY)

+{

+    FX_BOOL steep = FXSYS_abs(toY - fromY) > FXSYS_abs(toX - fromX);

+    if (steep) {

+        FX_INT32 temp = fromX;

+        fromX = fromY;

+        fromY = temp;

+        temp = toX;

+        toX = toY;

+        toY = temp;

+    }

+    FX_INT32 dx = FXSYS_abs(toX - fromX);

+    FX_INT32 dy = FXSYS_abs(toY - fromY);

+    FX_INT32 error = -dx >> 1;

+    FX_INT32 ystep = fromY < toY ? 1 : -1;

+    FX_INT32 xstep = fromX < toX ? 1 : -1;

+    FX_INT32 state = 0;

+    for (FX_INT32 x = fromX, y = fromY; x != toX; x += xstep) {

+        FX_INT32 realX = steep ? y : x;

+        FX_INT32 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) {

+            FX_INT32 diffX = x - fromX;

+            FX_INT32 diffY = y - fromY;

+            return (FX_FLOAT) sqrt((double) (diffX * diffX + diffY * diffY));

+        }

+        error += dy;

+        if (error > 0) {

+            y += ystep;

+            error -= dx;

+        }

+    }

+    FX_INT32 diffX = toX - fromX;

+    FX_INT32 diffY = toY - fromY;

+    return (FX_FLOAT) sqrt((double) (diffX * diffX + diffY * diffY));

+}

+CBC_QRAlignmentPattern *CBC_QRDetector::FindAlignmentInRegion(FX_FLOAT overallEstModuleSize, FX_INT32 estAlignmentX,

+        FX_INT32 estAlignmentY, FX_FLOAT allowanceFactor, FX_INT32 &e)

+{

+    FX_INT32 allowance = (FX_INT32) (allowanceFactor * overallEstModuleSize);

+    FX_INT32 alignmentAreaLeftX = FX_MAX(0, estAlignmentX - allowance);

+    FX_INT32 alignmentAreaRightX = FX_MIN(m_image->GetWidth() - 1, estAlignmentX + allowance);

+    if (alignmentAreaRightX - alignmentAreaLeftX < overallEstModuleSize * 3) {

+        e = BCExceptionRead;

+        BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+    }

+    FX_INT32 alignmentAreaTopY = FX_MAX(0, estAlignmentY - allowance);

+    FX_INT32 alignmentAreaBottomY = FX_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;

+}