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diff --git a/xfa/fxgraphics/cxfa_shading.h b/xfa/fxgraphics/cxfa_shading.h
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+++ b/xfa/fxgraphics/cxfa_shading.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 XFA_FXGRAPHICS_CXFA_SHADING_H_
+#define XFA_FXGRAPHICS_CXFA_SHADING_H_
+
+#include "core/fxcrt/fx_coordinates.h"
+#include "core/fxcrt/fx_system.h"
+#include "core/fxge/fx_dib.h"
+
+#define FX_SHADING_Steps 256
+
+enum CXFA_Shading_Type { FX_SHADING_Axial = 1, FX_SHADING_Radial };
+
+class CXFA_Shading {
+ public:
+  // Axial shading.
+  CXFA_Shading(const CFX_PointF& beginPoint,
+               const CFX_PointF& endPoint,
+               bool isExtendedBegin,
+               bool isExtendedEnd,
+               const FX_ARGB beginArgb,
+               const FX_ARGB endArgb);
+
+  // Radial shading.
+  CXFA_Shading(const CFX_PointF& beginPoint,
+               const CFX_PointF& endPoint,
+               const float beginRadius,
+               const float endRadius,
+               bool isExtendedBegin,
+               bool isExtendedEnd,
+               const FX_ARGB beginArgb,
+               const FX_ARGB endArgb);
+  virtual ~CXFA_Shading();
+
+ private:
+  friend class CXFA_Graphics;
+
+  void InitArgbArray();
+
+  const CXFA_Shading_Type m_type;
+  const CFX_PointF m_beginPoint;
+  const CFX_PointF m_endPoint;
+  const float m_beginRadius;
+  const float m_endRadius;
+  const bool m_isExtendedBegin;
+  const bool m_isExtendedEnd;
+  const FX_ARGB m_beginArgb;
+  const FX_ARGB m_endArgb;
+  FX_ARGB m_argbArray[FX_SHADING_Steps];
+};
+
+#endif  // XFA_FXGRAPHICS_CXFA_SHADING_H_