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, 179 insertions, 0 deletions

diff --git a/xfa/src/fxbarcode/oned/BC_OneDReader.cpp b/xfa/src/fxbarcode/oned/BC_OneDReader.cpp
new file mode 100644
index 0000000000..1079c348d0
--- /dev/null
+++ b/xfa/src/fxbarcode/oned/BC_OneDReader.cpp
@@ -0,0 +1,179 @@
+// 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 "../barcode.h"

+#include "../BC_Reader.h"

+#include "../BC_BinaryBitmap.h"

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

+#include "BC_OneDReader.h"

+const FX_INT32 CBC_OneDReader::INTEGER_MATH_SHIFT = 8;

+const FX_INT32 CBC_OneDReader::PATTERN_MATCH_RESULT_SCALE_FACTOR = 1 << 8;

+CBC_OneDReader::CBC_OneDReader()

+{

+}

+CBC_OneDReader::~CBC_OneDReader()

+{

+}

+CFX_ByteString CBC_OneDReader::Decode(CBC_BinaryBitmap *image, FX_INT32 &e)

+{

+    CFX_ByteString strtemp = Decode(image, 0, e);

+    BC_EXCEPTION_CHECK_ReturnValue(e, "");

+    return strtemp;

+}

+CFX_ByteString CBC_OneDReader::Decode(CBC_BinaryBitmap *image, FX_INT32 hints, FX_INT32 &e)

+{

+    CFX_ByteString strtemp = DeDecode(image, hints, e);

+    BC_EXCEPTION_CHECK_ReturnValue(e, "");

+    return strtemp;

+}

+CFX_ByteString CBC_OneDReader::DeDecode(CBC_BinaryBitmap *image, FX_INT32 hints, FX_INT32 &e)

+{

+    FX_INT32 width = image->GetWidth();

+    FX_INT32 height = image->GetHeight();

+    CBC_CommonBitArray *row = NULL;

+    FX_INT32 middle = height >> 1;

+    FX_BOOL tryHarder = FALSE;

+    FX_INT32 rowStep = FX_MAX(1, height >> (tryHarder ? 8 : 5));

+    FX_INT32 maxLines;

+    if (tryHarder) {

+        maxLines = height;

+    } else {

+        maxLines = 15;

+    }

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

+        FX_INT32 rowStepsAboveOrBelow = (x + 1) >> 1;

+        FX_BOOL isAbove = (x & 0x01) == 0;

+        FX_INT32 rowNumber = middle + rowStep * (isAbove ? rowStepsAboveOrBelow : -rowStepsAboveOrBelow);

+        if (rowNumber < 0 || rowNumber >= height) {

+            break;

+        }

+        row = image->GetBlackRow(rowNumber, NULL, e);

+        if (e != BCExceptionNO) {

+            e = BCExceptionNO;

+            if(row != NULL) {

+                delete row;

+                row = NULL;

+            }

+            continue;

+        }

+        for (FX_INT32 attempt = 0; attempt < 2; attempt++) {

+            if (attempt == 1) {

+                row->Reverse();

+            }

+            CFX_ByteString result = DecodeRow(rowNumber, row, hints, e);

+            if (e != BCExceptionNO) {

+                e = BCExceptionNO;

+                continue;

+            }

+            if(row != NULL) {

+                delete row;

+                row = NULL;

+            }

+            return result;

+        }

+        if(row != NULL) {

+            delete row;

+            row = NULL;

+        }

+    }

+    e = BCExceptionNotFound;

+    return "";

+}

+void CBC_OneDReader::RecordPattern(CBC_CommonBitArray *row, FX_INT32 start, CFX_Int32Array *counters, FX_INT32 &e)

+{

+    FX_INT32 numCounters = counters->GetSize();

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

+        (*counters)[i] = 0;

+    }

+    FX_INT32 end = row->GetSize();

+    if (start >= end) {

+        e = BCExceptionNotFound;

+        return;

+    }

+    FX_BOOL isWhite = !row->Get(start);

+    FX_INT32 counterPosition = 0;

+    FX_INT32 j = start;

+    while (j < end) {

+        FX_BOOL pixel = row->Get(j);

+        if (pixel ^ isWhite) {

+            (*counters)[counterPosition]++;

+        } else {

+            counterPosition++;

+            if (counterPosition == numCounters) {

+                break;

+            } else {

+                (*counters)[counterPosition] = 1;

+                isWhite = !isWhite;

+            }

+        }

+        j++;

+    }

+    if (!(counterPosition == numCounters || (counterPosition == numCounters - 1 && j == end))) {

+        e = BCExceptionNotFound;

+        return;

+    }

+}

+void CBC_OneDReader::RecordPatternInReverse(CBC_CommonBitArray *row, FX_INT32 start, CFX_Int32Array *counters, FX_INT32 &e)

+{

+    FX_INT32 numTransitionsLeft = counters->GetSize();

+    FX_BOOL last = row->Get(start);

+    while (start > 0 && numTransitionsLeft >= 0) {

+        if (row->Get(--start) != last) {

+            numTransitionsLeft--;

+            last = !last;

+        }

+    }

+    if (numTransitionsLeft >= 0) {

+        e = BCExceptionNotFound;

+        return;

+    }

+    RecordPattern(row, start + 1, counters, e);

+    BC_EXCEPTION_CHECK_ReturnVoid(e);

+}

+FX_INT32 CBC_OneDReader::PatternMatchVariance(CFX_Int32Array *counters, const 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) {

+#undef max

+        return FXSYS_IntMax;

+    }

+    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) {

+#undef max

+            return FXSYS_IntMax;

+        }

+        totalVariance += variance;

+    }

+    return totalVariance / total;

+}