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_ 9 class CBC_Reader; 10 class CBC_BinaryBitmap; 11 class CBC_CommonBitArray; 12 class CBC_OneDReader; 13 class 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
