Organize barcode codes into modules.

xfa/src/fxbarcode/src/BC_OneDReader.cpp

-// 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 "include/BC_Reader.h"
-#include "include/BC_OneDReader.h"
-#include "include/BC_BinaryBitmap.h"
-#include "include/BC_CommonBitArray.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;
-}