Move xfa/src up to xfa/.

xfa/src/fxbarcode/common/BC_GlobalHistogramBinarizer.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 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 "xfa/src/fxbarcode/common/BC_GlobalHistogramBinarizer.h"
-
-#include <memory>
-
-#include "xfa/src/fxbarcode/BC_Binarizer.h"
-#include "xfa/src/fxbarcode/BC_LuminanceSource.h"
-#include "xfa/src/fxbarcode/common/BC_CommonBitArray.h"
-#include "xfa/src/fxbarcode/common/BC_CommonBitMatrix.h"
-#include "xfa/src/fxbarcode/utils.h"
-
-const int32_t LUMINANCE_BITS = 5;
-const int32_t LUMINANCE_SHIFT = 8 - LUMINANCE_BITS;
-const int32_t LUMINANCE_BUCKETS = 1 << LUMINANCE_BITS;
-
-CBC_GlobalHistogramBinarizer::CBC_GlobalHistogramBinarizer(
-    CBC_LuminanceSource* source)
-    : CBC_Binarizer(source) {}
-CBC_GlobalHistogramBinarizer::~CBC_GlobalHistogramBinarizer() {}
-CBC_CommonBitArray* CBC_GlobalHistogramBinarizer::GetBlackRow(
-    int32_t y,
-    CBC_CommonBitArray* row,
-    int32_t& e) {
-  CBC_LuminanceSource* source = GetLuminanceSource();
-  int32_t width = source->GetWidth();
-  std::unique_ptr<CBC_CommonBitArray> result(new CBC_CommonBitArray(width));
-  InitArrays(width);
-  CFX_ByteArray* localLuminances = source->GetRow(y, m_luminance, e);
-  if (e != BCExceptionNO) {
-    return result.release();
-  }
-  CFX_Int32Array localBuckets;
-  localBuckets.Copy(m_buckets);
-  int32_t x;
-  for (x = 0; x < width; x++) {
-    int32_t pixel = (*localLuminances)[x] & 0xff;
-    localBuckets[pixel >> LUMINANCE_SHIFT]++;
-  }
-  int32_t blackPoint = EstimateBlackPoint(localBuckets, e);
-  if (e != BCExceptionNO) {
-    return result.release();
-  }
-  int32_t left = (*localLuminances)[0] & 0xff;
-  int32_t center = (*localLuminances)[1] & 0xff;
-  for (x = 1; x < width - 1; x++) {
-    int32_t right = (*localLuminances)[x + 1] & 0xff;
-    int32_t luminance = ((center << 2) - left - right) >> 1;
-    if (luminance < blackPoint) {
-      result->Set(x);
-    }
-    left = center;
-    center = right;
-  }
-  return result.release();
-}
-CBC_CommonBitMatrix* CBC_GlobalHistogramBinarizer::GetBlackMatrix(int32_t& e) {
-  CBC_LuminanceSource* source = GetLuminanceSource();
-  int32_t width = source->GetWidth();
-  int32_t height = source->GetHeight();
-  std::unique_ptr<CBC_CommonBitMatrix> matrix(new CBC_CommonBitMatrix());
-  matrix->Init(width, height);
-  InitArrays(width);
-  CFX_Int32Array localBuckets;
-  localBuckets.Copy(m_buckets);
-  int32_t y;
-  for (y = 1; y < 5; y++) {
-    int32_t row = height * y / 5;
-    CFX_ByteArray* localLuminances = source->GetRow(row, m_luminance, e);
-    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
-    int32_t right = (width << 2) / 5;
-    int32_t x;
-    for (x = width / 5; x < right; x++) {
-      int32_t pixel = (*localLuminances)[x] & 0xff;
-      localBuckets[pixel >> LUMINANCE_SHIFT]++;
-    }
-  }
-  int32_t blackPoint = EstimateBlackPoint(localBuckets, e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
-  std::unique_ptr<CFX_ByteArray> localLuminances(source->GetMatrix());
-  for (y = 0; y < height; y++) {
-    int32_t offset = y * width;
-    for (int32_t x = 0; x < width; x++) {
-      int32_t pixel = (*localLuminances)[offset + x] & 0xff;
-      if (pixel < blackPoint) {
-        matrix->Set(x, y);
-      }
-    }
-  }
-  return matrix.release();
-}
-void CBC_GlobalHistogramBinarizer::InitArrays(int32_t luminanceSize) {
-  if (m_luminance.GetSize() < luminanceSize) {
-    m_luminance.SetSize(luminanceSize);
-  }
-  if (m_buckets.GetSize() <= 0) {
-    m_buckets.SetSize(LUMINANCE_BUCKETS);
-  } else {
-    int32_t x;
-    for (x = 0; x < LUMINANCE_BUCKETS; x++) {
-      m_buckets[x] = 0;
-    }
-  }
-}
-int32_t CBC_GlobalHistogramBinarizer::EstimateBlackPoint(
-    CFX_Int32Array& buckets,
-    int32_t& e) {
-  int32_t numBuckets = buckets.GetSize();
-  int32_t maxBucketCount = 0;
-  int32_t firstPeak = 0;
-  int32_t firstPeakSize = 0;
-  int32_t x;
-  for (x = 0; x < numBuckets; x++) {
-    if (buckets[x] > firstPeakSize) {
-      firstPeak = x;
-      firstPeakSize = buckets[x];
-    }
-    if (buckets[x] > maxBucketCount) {
-      maxBucketCount = buckets[x];
-    }
-  }
-  int32_t secondPeak = 0;
-  int32_t secondPeakScore = 0;
-  for (x = 0; x < numBuckets; x++) {
-    int32_t distanceToBiggest = x - firstPeak;
-    int32_t score = buckets[x] * distanceToBiggest * distanceToBiggest;
-    if (score > secondPeakScore) {
-      secondPeak = x;
-      secondPeakScore = score;
-    }
-  }
-  if (firstPeak > secondPeak) {
-    int32_t temp = firstPeak;
-    firstPeak = secondPeak;
-    secondPeak = temp;
-  }
-  if (secondPeak - firstPeak <= numBuckets >> 4) {
-    e = BCExceptionRead;
-    return 0;
-  }
-  int32_t bestValley = secondPeak - 1;
-  int32_t bestValleyScore = -1;
-  for (x = secondPeak - 1; x > firstPeak; x--) {
-    int32_t fromFirst = x - firstPeak;
-    int32_t score = fromFirst * fromFirst * (secondPeak - x) *
-                    (maxBucketCount - buckets[x]);
-    if (score > bestValleyScore) {
-      bestValley = x;
-      bestValleyScore = score;
-    }
-  }
-  return bestValley << LUMINANCE_SHIFT;
-}