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 #include <memory>
12 
13 #include "core/fpdfapi/page/cpdf_page.h"
14 #include "core/fxcrt/fx_system.h"
15 #include "core/fxcrt/maybe_owned.h"
16 #include "core/fxcrt/retain_ptr.h"
17 #include "core/fxcrt/unowned_ptr.h"
18 
19 class CPDF_Image;
20 class CPDF_ImageCacheEntry;
21 class CPDF_Page;
22 class CPDF_RenderStatus;
23 class CPDF_Stream;
24 class PauseIndicatorIface;
25 
26 class CPDF_PageRenderCache : public CPDF_Page::RenderCacheIface {
27  public:
28   explicit CPDF_PageRenderCache(CPDF_Page* pPage);
29   ~CPDF_PageRenderCache() override;
30 
31   // CPDF_Page::RenderCacheIface:
32   void ResetBitmapForImage(const RetainPtr<CPDF_Image>& pImage) override;
33 
34   void CacheOptimization(int32_t dwLimitCacheSize);
GetTimeCount()35   uint32_t GetTimeCount() const { return m_nTimeCount; }
GetPage()36   CPDF_Page* GetPage() const { return m_pPage.Get(); }
GetCurImageCacheEntry()37   CPDF_ImageCacheEntry* GetCurImageCacheEntry() const {
38     return m_pCurImageCacheEntry.Get();
39   }
40 
41   bool StartGetCachedBitmap(const RetainPtr<CPDF_Image>& pImage,
42                             const CPDF_RenderStatus* pRenderStatus,
43                             bool bStdCS);
44 
45   bool Continue(PauseIndicatorIface* pPause, CPDF_RenderStatus* pRenderStatus);
46 
47  private:
48   void ClearImageCacheEntry(CPDF_Stream* pStream);
49 
50   UnownedPtr<CPDF_Page> const m_pPage;
51   std::map<CPDF_Stream*, std::unique_ptr<CPDF_ImageCacheEntry>> m_ImageCache;
52   MaybeOwned<CPDF_ImageCacheEntry> m_pCurImageCacheEntry;
53   uint32_t m_nTimeCount = 0;
54   uint32_t m_nCacheSize = 0;
55   bool m_bCurFindCache = false;
56 };
57 
58 #endif  // CORE_FPDFAPI_RENDER_CPDF_PAGERENDERCACHE_H_
59