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, 311 insertions, 0 deletions

diff --git a/xfa/src/fxbarcode/pdf417/BC_PDF417Detector.cpp b/xfa/src/fxbarcode/pdf417/BC_PDF417Detector.cpp
new file mode 100644
index 0000000000..8d1a86ec92
--- /dev/null
+++ b/xfa/src/fxbarcode/pdf417/BC_PDF417Detector.cpp
@@ -0,0 +1,311 @@
+// 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 2009 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 "../BC_ResultPoint.h"

+#include "../BC_BinaryBitmap.h"

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

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

+#include "BC_PDF417DetectorResult.h"

+#include "BC_PDF417Detector.h"

+#define  INTERGER_MAX     2147483647

+FX_INT32 CBC_Detector::INDEXES_START_PATTERN[] = {0, 4, 1, 5};

+FX_INT32 CBC_Detector::INDEXES_STOP_PATTERN[] = {6, 2, 7, 3};

+FX_INT32 CBC_Detector::INTEGER_MATH_SHIFT = 8;

+FX_INT32 CBC_Detector::PATTERN_MATCH_RESULT_SCALE_FACTOR = 1 << INTEGER_MATH_SHIFT;

+FX_INT32 CBC_Detector::MAX_AVG_VARIANCE = (FX_INT32) (PATTERN_MATCH_RESULT_SCALE_FACTOR * 0.42f);

+FX_INT32 CBC_Detector::MAX_INDIVIDUAL_VARIANCE = (FX_INT32) (PATTERN_MATCH_RESULT_SCALE_FACTOR * 0.8f);

+FX_INT32 CBC_Detector::START_PATTERN[] = {8, 1, 1, 1, 1, 1, 1, 3};

+FX_INT32 CBC_Detector::STOP_PATTERN[] = {7, 1, 1, 3, 1, 1, 1, 2, 1};

+FX_INT32 CBC_Detector::MAX_PIXEL_DRIFT = 3;

+FX_INT32 CBC_Detector::MAX_PATTERN_DRIFT = 5;

+FX_INT32 CBC_Detector::SKIPPED_ROW_COUNT_MAX = 25;

+FX_INT32 CBC_Detector::ROW_STEP = 5;

+FX_INT32 CBC_Detector::BARCODE_MIN_HEIGHT = 10;

+CBC_Detector::CBC_Detector()

+{

+}

+CBC_Detector::~CBC_Detector()

+{

+}

+CBC_PDF417DetectorResult* CBC_Detector::detect(CBC_BinaryBitmap* image, FX_INT32 hints, FX_BOOL multiple, FX_INT32 &e)

+{

+    CBC_CommonBitMatrix* bitMatrix = image->GetBlackMatrix(e);

+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+    CFX_PtrArray* barcodeCoordinates = detect(multiple, bitMatrix);

+    if (barcodeCoordinates->GetSize() == 0) {

+        rotate180(bitMatrix);

+        barcodeCoordinates = detect(multiple, bitMatrix);

+    }

+    if (barcodeCoordinates->GetSize() == 0) {

+        e = BCExceptionUnSupportedBarcode;

+        BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+    }

+    CBC_PDF417DetectorResult* detectorResult = FX_NEW CBC_PDF417DetectorResult(bitMatrix, barcodeCoordinates);

+    return detectorResult;

+}

+void CBC_Detector::rotate180(CBC_CommonBitMatrix* bitMatrix)

+{

+    FX_INT32 width = bitMatrix->GetWidth();

+    FX_INT32 height = bitMatrix->GetHeight();

+    CBC_CommonBitArray* firstRowBitArray = FX_NEW CBC_CommonBitArray(width);

+    CBC_CommonBitArray* secondRowBitArray = FX_NEW CBC_CommonBitArray(width);

+    CBC_CommonBitArray* tmpBitArray = FX_NEW CBC_CommonBitArray(width);

+    for (FX_INT32 y = 0; y < (height + 1) >> 1; y++) {

+        CBC_CommonBitArray* temp = bitMatrix->GetRow(height - 1 - y, secondRowBitArray);

+        CBC_CommonBitArray* tempfirstRow = firstRowBitArray;

+        firstRowBitArray = bitMatrix->GetRow(y, tempfirstRow);

+        delete tempfirstRow;

+        CBC_CommonBitArray* row = mirror(temp, tmpBitArray);

+        delete temp;

+        bitMatrix->SetRow(y, row);

+        delete row;

+        CBC_CommonBitArray* rowfirstRow = mirror(firstRowBitArray, tmpBitArray);

+        bitMatrix->SetRow(height - 1 - y, rowfirstRow);

+        delete rowfirstRow;

+    }

+    delete tmpBitArray;

+    delete firstRowBitArray;

+    delete secondRowBitArray;

+}

+CBC_CommonBitArray* CBC_Detector::mirror(CBC_CommonBitArray* input, CBC_CommonBitArray* result)

+{

+    CBC_CommonBitArray* array = FX_NEW CBC_CommonBitArray(result->GetSize());

+    array->Clear();

+    FX_INT32 size = input->GetSize();

+    for (FX_INT32 i = 0; i < size; i++) {

+        if (input->Get(i)) {

+            array->Set(size - 1 - i);

+        }

+    }

+    return array;

+}

+CFX_PtrArray* CBC_Detector::detect(FX_BOOL multiple, CBC_CommonBitMatrix* bitMatrix)

+{

+    CFX_PtrArray* barcodeCoordinates = FX_NEW CFX_PtrArray;

+    FX_INT32 row = 0;

+    FX_INT32 column = 0;

+    FX_BOOL foundBarcodeInRow = FALSE;

+    while (row < bitMatrix->GetHeight()) {

+        CFX_PtrArray* vertices = findVertices(bitMatrix, row, column);

+        if (vertices->GetAt(0) == NULL && vertices->GetAt(3) == NULL) {

+            if (!foundBarcodeInRow) {

+                if (vertices) {

+                    delete(vertices);

+                }

+                break;

+            }

+            foundBarcodeInRow = FALSE;

+            column = 0;

+            for (FX_INT32 i = 0; i < barcodeCoordinates->GetSize(); i++) {

+                CFX_PtrArray* barcodeCoordinate = (CFX_PtrArray*)barcodeCoordinates->GetAt(i);

+                if (barcodeCoordinate->GetAt(1) != NULL) {

+                    row = row > ((CBC_ResultPoint*)barcodeCoordinate->GetAt(1))->GetY();

+                }

+                if (barcodeCoordinate->GetAt(3) != NULL) {

+                    row = row > ((CBC_ResultPoint*)barcodeCoordinate->GetAt(3))->GetY();

+                }

+            }

+            row += ROW_STEP;

+            if (vertices) {

+                delete(vertices);

+            }

+            continue;

+        }

+        foundBarcodeInRow = TRUE;

+        barcodeCoordinates->Add(vertices);

+        if (!multiple) {

+            break;

+        }

+        if (vertices->GetAt(2) != NULL) {

+            column = (FX_INT32) ((CBC_ResultPoint*)vertices->GetAt(2))->GetX();

+            row = (FX_INT32) ((CBC_ResultPoint*)vertices->GetAt(2))->GetY();

+        } else {

+            column = (FX_INT32) ((CBC_ResultPoint*)vertices->GetAt(4))->GetX();

+            row = (FX_INT32) ((CBC_ResultPoint*)vertices->GetAt(4))->GetY();

+        }

+    }

+    return barcodeCoordinates;

+}

+CFX_PtrArray* CBC_Detector::findVertices(CBC_CommonBitMatrix* matrix, FX_INT32 startRow, FX_INT32 startColumn)

+{

+    FX_INT32 height = matrix->GetHeight();

+    FX_INT32 width = matrix->GetWidth();

+    CFX_PtrArray* result = FX_NEW CFX_PtrArray;

+    result->SetSize(8);

+    CFX_PtrArray* startptr =  findRowsWithPattern(matrix, height, width, startRow, startColumn, START_PATTERN, sizeof(START_PATTERN) / sizeof(START_PATTERN[0]));

+    copyToResult(result, startptr, INDEXES_START_PATTERN, sizeof(INDEXES_START_PATTERN) / sizeof(INDEXES_START_PATTERN[0]));

+    startptr->RemoveAll();

+    delete startptr;

+    if (result->GetAt(4) != NULL) {

+        startColumn = (FX_INT32) ((CBC_ResultPoint*)result->GetAt(4))->GetX();

+        startRow = (FX_INT32) ((CBC_ResultPoint*)result->GetAt(4))->GetY();

+    }

+    CFX_PtrArray*  stopptr = findRowsWithPattern(matrix, height, width, startRow, startColumn, STOP_PATTERN, sizeof(STOP_PATTERN) / sizeof(STOP_PATTERN[0]));

+    copyToResult(result, stopptr, INDEXES_STOP_PATTERN, sizeof(INDEXES_STOP_PATTERN) / sizeof(INDEXES_STOP_PATTERN[0]));

+    stopptr->RemoveAll();

+    delete stopptr;

+    return result;

+}

+void CBC_Detector::copyToResult(CFX_PtrArray *result, CFX_PtrArray* tmpResult, FX_INT32* destinationIndexes, FX_INT32 destinationLength)

+{

+    for (FX_INT32 i = 0; i < destinationLength; i++) {

+        result->SetAt(destinationIndexes[i], tmpResult->GetAt(i));

+    }

+}

+CFX_PtrArray* CBC_Detector::findRowsWithPattern(CBC_CommonBitMatrix* matrix, FX_INT32 height, FX_INT32 width, FX_INT32 startRow, FX_INT32 startColumn, FX_INT32* pattern, FX_INT32 patternLength)

+{

+    CFX_PtrArray* result = FX_NEW CFX_PtrArray;

+    result->SetSize(4);

+    FX_BOOL found = FALSE;

+    CFX_Int32Array counters;

+    counters.SetSize(patternLength);

+    for (; startRow < height; startRow += ROW_STEP) {

+        CFX_Int32Array* loc = findGuardPattern(matrix, startColumn, startRow, width, FALSE, pattern, patternLength, counters);

+        if (loc != NULL) {

+            while (startRow > 0) {

+                CFX_Int32Array* previousRowLoc = findGuardPattern(matrix, startColumn, --startRow, width, FALSE, pattern, patternLength, counters);

+                if (previousRowLoc != NULL) {

+                    delete loc;

+                    loc = previousRowLoc;

+                } else {

+                    startRow++;

+                    break;

+                }

+            }

+            result->SetAt(0, FX_NEW CBC_ResultPoint((FX_FLOAT)loc->GetAt(0), (FX_FLOAT)startRow));

+            result->SetAt(1, FX_NEW CBC_ResultPoint((FX_FLOAT)loc->GetAt(1), (FX_FLOAT)startRow));

+            found = TRUE;

+            delete loc;

+            break;

+        }

+    }

+    FX_INT32 stopRow = startRow + 1;

+    if (found) {

+        FX_INT32 skippedRowCount = 0;

+        CFX_Int32Array previousRowLoc;

+        previousRowLoc.Add((FX_INT32)((CBC_ResultPoint*)result->GetAt(0))->GetX());

+        previousRowLoc.Add((FX_INT32)((CBC_ResultPoint*)result->GetAt(1))->GetX());

+        for (; stopRow < height; stopRow++) {

+            CFX_Int32Array* loc = findGuardPattern(matrix, previousRowLoc[0], stopRow, width, FALSE, pattern, patternLength, counters);

+            if (loc != NULL &&

+                    abs(previousRowLoc[0] - loc->GetAt(0)) < MAX_PATTERN_DRIFT &&

+                    abs(previousRowLoc[1] - loc->GetAt(1)) < MAX_PATTERN_DRIFT) {

+                previousRowLoc.Copy(*loc);

+                skippedRowCount = 0;

+            } else {

+                if (skippedRowCount > SKIPPED_ROW_COUNT_MAX) {

+                    delete loc;

+                    break;

+                } else {

+                    skippedRowCount++;

+                }

+            }

+            delete loc;

+        }

+        stopRow -= skippedRowCount + 1;

+        result->SetAt(2, FX_NEW CBC_ResultPoint((FX_FLOAT)previousRowLoc.GetAt(0), (FX_FLOAT)stopRow));

+        result->SetAt(3, FX_NEW CBC_ResultPoint((FX_FLOAT)previousRowLoc.GetAt(1), (FX_FLOAT)stopRow));

+    }

+    if (stopRow - startRow < BARCODE_MIN_HEIGHT) {

+        for (FX_INT32 i = 0; i < result->GetSize(); i++) {

+            result->SetAt(i, NULL);

+        }

+    }

+    return result;

+}

+CFX_Int32Array* CBC_Detector::findGuardPattern(CBC_CommonBitMatrix* matrix, FX_INT32 column, FX_INT32 row, FX_INT32 width, FX_BOOL whiteFirst, FX_INT32* pattern, FX_INT32 patternLength, CFX_Int32Array &counters)

+{

+    for (FX_INT32 i = 0; i < counters.GetSize(); i++) {

+        counters.SetAt(i, 0);

+    }

+    FX_BOOL isWhite = whiteFirst;

+    FX_INT32 patternStart = column;

+    FX_INT32 pixelDrift = 0;

+    CFX_Int32Array* intarray = FX_NEW CFX_Int32Array;

+    while (matrix->Get(patternStart, row) && patternStart > 0 && pixelDrift++ < MAX_PIXEL_DRIFT) {

+        patternStart--;

+    }

+    FX_INT32 x = patternStart;

+    FX_INT32 counterPosition = 0;

+    for (; x < width; x++) {

+        FX_BOOL pixel = matrix->Get(x, row);

+        if (pixel ^ isWhite) {

+            counters[counterPosition]++;

+        } else {

+            if (counterPosition == patternLength - 1) {

+                if (patternMatchVariance(counters, pattern, MAX_INDIVIDUAL_VARIANCE) < MAX_AVG_VARIANCE) {

+                    intarray->Add(patternStart);

+                    intarray->Add(x);

+                    return intarray;

+                }

+                patternStart += counters[0] + counters[1];

+                for (FX_INT32 l = 2, k = 0; l < patternLength; l++, k++) {

+                    counters.SetAt(k, counters.GetAt(l));

+                }

+                counters.SetAt(patternLength - 2, 0);

+                counters.SetAt(patternLength - 1, 0);

+                counterPosition--;

+            } else {

+                counterPosition++;

+            }

+            counters[counterPosition] = 1;

+            isWhite = !isWhite;

+        }

+    }

+    if (counterPosition == patternLength - 1) {

+        if (patternMatchVariance(counters, pattern, MAX_INDIVIDUAL_VARIANCE) < MAX_AVG_VARIANCE) {

+            intarray->Add(patternStart);

+            intarray->Add(x - 1);

+            return intarray;

+        }

+    }

+    delete intarray;

+    return NULL;

+}

+FX_INT32 CBC_Detector::patternMatchVariance(CFX_Int32Array &counters, FX_INT32* pattern, FX_INT32 maxIndividualVariance)

+{

+    FX_INT32 numCounters = counters.GetSize();

+    FX_INT32 total = 0;

+    FX_INT32 patternLength = 0;

+    for (FX_INT32 i = 0; i < numCounters; i++) {

+        total += counters[i];

+        patternLength += pattern[i];

+    }

+    if (total < patternLength) {

+        return INTERGER_MAX;

+    }

+    FX_INT32 unitBarWidth = (total << INTEGER_MATH_SHIFT) / patternLength;

+    maxIndividualVariance = (maxIndividualVariance * unitBarWidth) >> INTEGER_MATH_SHIFT;

+    FX_INT32 totalVariance = 0;

+    for (FX_INT32 x = 0; x < numCounters; x++) {

+        FX_INT32 counter = counters[x] << INTEGER_MATH_SHIFT;

+        FX_INT32 scaledPattern = pattern[x] * unitBarWidth;

+        FX_INT32 variance = counter > scaledPattern ? counter - scaledPattern : scaledPattern - counter;

+        if (variance > maxIndividualVariance) {

+            return INTERGER_MAX;

+        }

+        totalVariance += variance;

+    }

+    return totalVariance / total;

+}

+