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diff --git a/core/fpdfapi/page/cpdf_pattern.h b/core/fpdfapi/page/cpdf_pattern.h
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+++ b/core/fpdfapi/page/cpdf_pattern.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_PAGE_CPDF_PATTERN_H_
+#define CORE_FPDFAPI_PAGE_CPDF_PATTERN_H_
+
+#include "core/fxcrt/fx_coordinates.h"
+#include "core/fxcrt/fx_system.h"
+
+class CPDF_Document;
+class CPDF_Object;
+class CPDF_ShadingPattern;
+class CPDF_TilingPattern;
+
+class CPDF_Pattern {
+ public:
+  enum PatternType { TILING = 1, SHADING };
+
+  virtual ~CPDF_Pattern();
+
+  virtual CPDF_TilingPattern* AsTilingPattern() = 0;
+  virtual CPDF_ShadingPattern* AsShadingPattern() = 0;
+
+  CPDF_Document* document() { return m_pDocument; }
+  CPDF_Object* pattern_obj() { return m_pPatternObj; }
+  CFX_Matrix* pattern_to_form() { return &m_Pattern2Form; }
+  const CFX_Matrix& parent_matrix() const { return m_ParentMatrix; }
+
+ protected:
+  CPDF_Pattern(PatternType type,
+               CPDF_Document* pDoc,
+               CPDF_Object* pObj,
+               const CFX_Matrix& parentMatrix);
+
+  const PatternType m_PatternType;
+  CPDF_Document* const m_pDocument;
+  CPDF_Object* const m_pPatternObj;
+  CFX_Matrix m_Pattern2Form;
+  const CFX_Matrix m_ParentMatrix;
+};
+
+#endif  // CORE_FPDFAPI_PAGE_CPDF_PATTERN_H_