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diff --git a/core/fpdfapi/page/cpdf_pageobject.h b/core/fpdfapi/page/cpdf_pageobject.h
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+++ b/core/fpdfapi/page/cpdf_pageobject.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_PAGEOBJECT_H_
+#define CORE_FPDFAPI_PAGE_CPDF_PAGEOBJECT_H_
+
+#include "core/fpdfapi/page/cpdf_contentmark.h"
+#include "core/fpdfapi/page/cpdf_graphicstates.h"
+#include "core/fxcrt/fx_coordinates.h"
+#include "core/fxcrt/fx_system.h"
+
+class CPDF_TextObject;
+class CPDF_PathObject;
+class CPDF_ImageObject;
+class CPDF_ShadingObject;
+class CPDF_FormObject;
+
+class CPDF_PageObject : public CPDF_GraphicStates {
+ public:
+  enum Type {
+    TEXT = 1,
+    PATH,
+    IMAGE,
+    SHADING,
+    FORM,
+  };
+
+  CPDF_PageObject();
+  ~CPDF_PageObject() override;
+
+  virtual CPDF_PageObject* Clone() const = 0;
+  virtual Type GetType() const = 0;
+  virtual void Transform(const CFX_Matrix& matrix) = 0;
+  virtual bool IsText() const;
+  virtual bool IsPath() const;
+  virtual bool IsImage() const;
+  virtual bool IsShading() const;
+  virtual bool IsForm() const;
+  virtual CPDF_TextObject* AsText();
+  virtual const CPDF_TextObject* AsText() const;
+  virtual CPDF_PathObject* AsPath();
+  virtual const CPDF_PathObject* AsPath() const;
+  virtual CPDF_ImageObject* AsImage();
+  virtual const CPDF_ImageObject* AsImage() const;
+  virtual CPDF_ShadingObject* AsShading();
+  virtual const CPDF_ShadingObject* AsShading() const;
+  virtual CPDF_FormObject* AsForm();
+  virtual const CPDF_FormObject* AsForm() const;
+
+  void TransformClipPath(CFX_Matrix& matrix);
+  void TransformGeneralState(CFX_Matrix& matrix);
+  FX_RECT GetBBox(const CFX_Matrix* pMatrix) const;
+
+  FX_FLOAT m_Left;
+  FX_FLOAT m_Right;
+  FX_FLOAT m_Top;
+  FX_FLOAT m_Bottom;
+  CPDF_ContentMark m_ContentMark;
+
+ protected:
+  void CopyData(const CPDF_PageObject* pSrcObject);
+
+ private:
+  CPDF_PageObject(const CPDF_PageObject& src) = delete;
+  void operator=(const CPDF_PageObject& src) = delete;
+};
+
+#endif  // CORE_FPDFAPI_PAGE_CPDF_PAGEOBJECT_H_