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diff --git a/core/fpdfapi/render/cpdf_pagerendercache.h b/core/fpdfapi/render/cpdf_pagerendercache.h
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index 0000000000..37d092062d
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+++ b/core/fpdfapi/render/cpdf_pagerendercache.h
@@ -0,0 +1,71 @@
+// 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_RENDER_CPDF_PAGERENDERCACHE_H_
+#define CORE_FPDFAPI_RENDER_CPDF_PAGERENDERCACHE_H_
+
+#include <map>
+
+#include "core/fxcrt/fx_system.h"
+
+class CPDF_Stream;
+class CPDF_ImageCacheEntry;
+class CPDF_Page;
+class CPDF_RenderStatus;
+class CFX_DIBitmap;
+class CFX_DIBSource;
+class IFX_Pause;
+
+class CPDF_PageRenderCache {
+ public:
+  explicit CPDF_PageRenderCache(CPDF_Page* pPage);
+  ~CPDF_PageRenderCache();
+
+  uint32_t EstimateSize();
+  void CacheOptimization(int32_t dwLimitCacheSize);
+  uint32_t GetTimeCount() const { return m_nTimeCount; }
+  void SetTimeCount(uint32_t dwTimeCount) { m_nTimeCount = dwTimeCount; }
+
+  void GetCachedBitmap(CPDF_Stream* pStream,
+                       CFX_DIBSource*& pBitmap,
+                       CFX_DIBSource*& pMask,
+                       uint32_t& MatteColor,
+                       FX_BOOL bStdCS = FALSE,
+                       uint32_t GroupFamily = 0,
+                       FX_BOOL bLoadMask = FALSE,
+                       CPDF_RenderStatus* pRenderStatus = nullptr,
+                       int32_t downsampleWidth = 0,
+                       int32_t downsampleHeight = 0);
+
+  void ResetBitmap(CPDF_Stream* pStream, const CFX_DIBitmap* pBitmap);
+  void ClearImageCacheEntry(CPDF_Stream* pStream);
+  CPDF_Page* GetPage() const { return m_pPage; }
+  CPDF_ImageCacheEntry* GetCurImageCacheEntry() const {
+    return m_pCurImageCacheEntry;
+  }
+
+  FX_BOOL StartGetCachedBitmap(CPDF_Stream* pStream,
+                               FX_BOOL bStdCS = FALSE,
+                               uint32_t GroupFamily = 0,
+                               FX_BOOL bLoadMask = FALSE,
+                               CPDF_RenderStatus* pRenderStatus = nullptr,
+                               int32_t downsampleWidth = 0,
+                               int32_t downsampleHeight = 0);
+
+  FX_BOOL Continue(IFX_Pause* pPause);
+
+ protected:
+  friend class CPDF_Page;
+
+  CPDF_Page* const m_pPage;
+  CPDF_ImageCacheEntry* m_pCurImageCacheEntry;
+  std::map<CPDF_Stream*, CPDF_ImageCacheEntry*> m_ImageCache;
+  uint32_t m_nTimeCount;
+  uint32_t m_nCacheSize;
+  FX_BOOL m_bCurFindCache;
+};
+
+#endif  // CORE_FPDFAPI_RENDER_CPDF_PAGERENDERCACHE_H_