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wumu

2024-12-13 1bb61da9f048f9f86b412479e3f4d18adb1876f2

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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_FPDF_RENDER_CPDF_PAGERENDERCACHE_H_
#define CORE_FPDFAPI_FPDF_RENDER_CPDF_PAGERENDERCACHE_H_
 
#include <map>
 
#include "core/fxcrt/include/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_FPDF_RENDER_CPDF_PAGERENDERCACHE_H_