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_GLOBALHISTOGRAMBINARIZER_H_
8 #define _BC_GLOBALHISTOGRAMBINARIZER_H_
9 class CBC_CommonBinarizer;
10 class CBC_CommonBitArray;
11 class CBC_CommonBitMatrix;
12 class CBC_LuminanceSource;
13 class CBC_GlobalHistogramBinarizer;
14 class CBC_GlobalHistogramBinarizer : public CBC_Binarizer {
15  public:
16   CBC_GlobalHistogramBinarizer(CBC_LuminanceSource* source);
17   virtual ~CBC_GlobalHistogramBinarizer();
18 
19   void InitArrays(int32_t luminanceSize);
20   CBC_CommonBitMatrix* GetBlackMatrix(int32_t& e);
21   CBC_CommonBitArray* GetBlackRow(int32_t y,
22                                   CBC_CommonBitArray* row,
23                                   int32_t& e);
24   static int32_t EstimateBlackPoint(CFX_Int32Array& buckets, int32_t& e);
25 
26  private:
27   CFX_ByteArray m_luminance;
28   CFX_Int32Array m_buckets;
29 };
30 #endif
31