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diff --git a/xfa/fxbarcode/common/BC_GlobalHistogramBinarizer.h b/xfa/fxbarcode/common/BC_GlobalHistogramBinarizer.h
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+// 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
+
+#ifndef XFA_FXBARCODE_COMMON_BC_GLOBALHISTOGRAMBINARIZER_H_
+#define XFA_FXBARCODE_COMMON_BC_GLOBALHISTOGRAMBINARIZER_H_
+
+#include "core/include/fxcrt/fx_basic.h"
+#include "xfa/fxbarcode/BC_Binarizer.h"
+
+class CBC_CommonBitArray;
+class CBC_CommonBitMatrix;
+class CBC_LuminanceSource;
+
+class CBC_GlobalHistogramBinarizer : public CBC_Binarizer {
+ public:
+ CBC_GlobalHistogramBinarizer(CBC_LuminanceSource* source);
+ virtual ~CBC_GlobalHistogramBinarizer();
+
+ void InitArrays(int32_t luminanceSize);
+ CBC_CommonBitMatrix* GetBlackMatrix(int32_t& e);
+ CBC_CommonBitArray* GetBlackRow(int32_t y,
+ CBC_CommonBitArray* row,
+ int32_t& e);
+ static int32_t EstimateBlackPoint(CFX_Int32Array& buckets, int32_t& e);
+
+ private:
+ CFX_ByteArray m_luminance;
+ CFX_Int32Array m_buckets;
+};
+
+#endif // XFA_FXBARCODE_COMMON_BC_GLOBALHISTOGRAMBINARIZER_H_