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diff --git a/core/fxge/cfx_cliprgn.h b/core/fxge/cfx_cliprgn.h
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+// Copyright 2016 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 CORE_FXGE_CFX_CLIPRGN_H_
+#define CORE_FXGE_CFX_CLIPRGN_H_
+
+#include "core/fxcrt/fx_coordinates.h"
+
+class CFX_DIBitmap;
+
+class CFX_ClipRgn {
+ public:
+ enum ClipType { RectI, MaskF };
+
+ CFX_ClipRgn(int device_width, int device_height);
+ CFX_ClipRgn(const CFX_ClipRgn& src);
+ ~CFX_ClipRgn();
+
+ ClipType GetType() const { return m_Type; }
+ const FX_RECT& GetBox() const { return m_Box; }
+ CFX_RetainPtr<CFX_DIBitmap> GetMask() const { return m_Mask; }
+
+ void Reset(const FX_RECT& rect);
+ void IntersectRect(const FX_RECT& rect);
+ void IntersectMaskF(int left,
+ int top,
+ const CFX_RetainPtr<CFX_DIBitmap>& Mask);
+
+ private:
+ void IntersectMaskRect(FX_RECT rect,
+ FX_RECT mask_box,
+ const CFX_RetainPtr<CFX_DIBitmap>& Mask);
+
+ ClipType m_Type;
+ FX_RECT m_Box;
+ CFX_RetainPtr<CFX_DIBitmap> m_Mask;
+};
+
+#endif // CORE_FXGE_CFX_CLIPRGN_H_