1// Copyright 2014 PDFium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6
7#ifndef _BC_ONEDREADER_H_
8#define _BC_ONEDREADER_H_
9class CBC_Reader;
10class CBC_BinaryBitmap;
11class CBC_CommonBitArray;
12class CBC_OneDReader;
13class CBC_OneDReader : public CBC_Reader {
14 public:
15  CBC_OneDReader();
16  virtual ~CBC_OneDReader();
17  virtual CFX_ByteString Decode(CBC_BinaryBitmap* image, int32_t& e);
18  virtual CFX_ByteString Decode(CBC_BinaryBitmap* image,
19                                int32_t hints,
20                                int32_t& e);
21  virtual CFX_ByteString DecodeRow(int32_t rowNumber,
22                                   CBC_CommonBitArray* row,
23                                   int32_t hints,
24                                   int32_t& e) {
25    return "";
26  }
27
28 private:
29  CFX_ByteString DeDecode(CBC_BinaryBitmap* image, int32_t hints, int32_t& e);
30
31 protected:
32  const static int32_t INTEGER_MATH_SHIFT;
33  const static int32_t PATTERN_MATCH_RESULT_SCALE_FACTOR;
34  void RecordPattern(CBC_CommonBitArray* row,
35                     int32_t start,
36                     CFX_Int32Array* counters,
37                     int32_t& e);
38  void RecordPatternInReverse(CBC_CommonBitArray* row,
39                              int32_t start,
40                              CFX_Int32Array* counters,
41                              int32_t& e);
42  int32_t PatternMatchVariance(CFX_Int32Array* counters,
43                               const int32_t* pattern,
44                               int32_t maxIndividualVariance);
45};
46#endif
47