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      1 // Copyright 2016 PDFium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
      6 
      7 #ifndef CORE_FPDFAPI_RENDER_CPDF_PAGERENDERCACHE_H_
      8 #define CORE_FPDFAPI_RENDER_CPDF_PAGERENDERCACHE_H_
      9 
     10 #include <map>
     11 
     12 #include "core/fxcrt/fx_system.h"
     13 #include "core/fxcrt/retain_ptr.h"
     14 #include "core/fxcrt/unowned_ptr.h"
     15 
     16 class CFX_DIBitmap;
     17 class CPDF_Image;
     18 class CPDF_ImageCacheEntry;
     19 class CPDF_Page;
     20 class CPDF_RenderStatus;
     21 class CPDF_Stream;
     22 class IFX_PauseIndicator;
     23 
     24 class CPDF_PageRenderCache {
     25  public:
     26   explicit CPDF_PageRenderCache(CPDF_Page* pPage);
     27   ~CPDF_PageRenderCache();
     28 
     29   void CacheOptimization(int32_t dwLimitCacheSize);
     30   uint32_t GetTimeCount() const { return m_nTimeCount; }
     31   void ResetBitmap(const RetainPtr<CPDF_Image>& pImage,
     32                    const RetainPtr<CFX_DIBitmap>& pBitmap);
     33   CPDF_Page* GetPage() const { return m_pPage.Get(); }
     34   CPDF_ImageCacheEntry* GetCurImageCacheEntry() const {
     35     return m_pCurImageCacheEntry;
     36   }
     37 
     38   bool StartGetCachedBitmap(const RetainPtr<CPDF_Image>& pImage,
     39                             bool bStdCS,
     40                             uint32_t GroupFamily,
     41                             bool bLoadMask,
     42                             CPDF_RenderStatus* pRenderStatus);
     43 
     44   bool Continue(IFX_PauseIndicator* pPause, CPDF_RenderStatus* pRenderStatus);
     45 
     46  private:
     47   void ClearImageCacheEntry(CPDF_Stream* pStream);
     48 
     49   UnownedPtr<CPDF_Page> const m_pPage;
     50   CPDF_ImageCacheEntry* m_pCurImageCacheEntry;
     51   std::map<CPDF_Stream*, CPDF_ImageCacheEntry*> m_ImageCache;
     52   uint32_t m_nTimeCount;
     53   uint32_t m_nCacheSize;
     54   bool m_bCurFindCache;
     55 };
     56 
     57 #endif  // CORE_FPDFAPI_RENDER_CPDF_PAGERENDERCACHE_H_
     58