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diff --git a/core/fpdfapi/fpdf_page/cpdf_shadingpattern.h b/core/fpdfapi/fpdf_page/cpdf_shadingpattern.h
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+++ b/core/fpdfapi/fpdf_page/cpdf_shadingpattern.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_FPDFAPI_FPDF_PAGE_CPDF_SHADINGPATTERN_H_
+#define CORE_FPDFAPI_FPDF_PAGE_CPDF_SHADINGPATTERN_H_
+
+#include "core/fpdfapi/fpdf_page/cpdf_countedobject.h"
+#include "core/fpdfapi/fpdf_page/cpdf_pattern.h"
+#include "core/fpdfapi/fpdf_page/pageint.h"
+#include "core/fxcrt/include/fx_system.h"
+
+typedef enum {
+  kInvalidShading = 0,
+  kFunctionBasedShading = 1,
+  kAxialShading = 2,
+  kRadialShading = 3,
+  kFreeFormGouraudTriangleMeshShading = 4,
+  kLatticeFormGouraudTriangleMeshShading = 5,
+  kCoonsPatchMeshShading = 6,
+  kTensorProductPatchMeshShading = 7,
+  kMaxShading = 8
+} ShadingType;
+
+class CFX_Matrix;
+class CPDF_ColorSpace;
+class CPDF_Document;
+class CPDF_Object;
+
+class CPDF_ShadingPattern : public CPDF_Pattern {
+ public:
+  CPDF_ShadingPattern(CPDF_Document* pDoc,
+                      CPDF_Object* pPatternObj,
+                      FX_BOOL bShading,
+                      const CFX_Matrix* parentMatrix);
+
+  ~CPDF_ShadingPattern() override;
+
+  bool IsMeshShading() const {
+    return m_ShadingType == kFreeFormGouraudTriangleMeshShading ||
+           m_ShadingType == kLatticeFormGouraudTriangleMeshShading ||
+           m_ShadingType == kCoonsPatchMeshShading ||
+           m_ShadingType == kTensorProductPatchMeshShading;
+  }
+  FX_BOOL Load();
+
+  ShadingType m_ShadingType;
+  FX_BOOL m_bShadingObj;
+  CPDF_Object* m_pShadingObj;
+
+  // Still keep |m_pCS| as some CPDF_ColorSpace (name object) are not managed
+  // as counted objects. Refer to CPDF_DocPageData::GetColorSpace.
+  CPDF_ColorSpace* m_pCS;
+
+  CPDF_CountedColorSpace* m_pCountedCS;
+  CPDF_Function* m_pFunctions[4];
+  int m_nFuncs;
+};
+
+#endif  // CORE_FPDFAPI_FPDF_PAGE_CPDF_SHADINGPATTERN_H_