GUIImageCacheImpl.h

/*
* Copyright (C) TES Electronic Solutions GmbH,
* All Rights Reserved.
* Contact: info@guiliani.de
*
* This file is part of the Guiliani HMI framework
* for the development of graphical user interfaces on embedded systems.
*/
 
#if !defined GUIIMAGECACHEIMPL_H
#define GUIIMAGECACHEIMPL_H
 
#include "GUIImageResource.h"
#include "GUIImageCache.h"
 
class CGUIImageCacheReplacementManager;
 
class CGUIImageCacheImpl : public CGUIImageCache
{
    friend class CGUIImageCache; 
 
public:
 
#ifdef GUILIANI_STREAM_GUI
    eC_Bool ReadCacheSettingsFromFile(const eC_String& rkPath);
#endif //GUILIANI_STREAM_GUI
 
    eC_UInt GetCurrentMemoryUsage() const;
 
    eC_UInt GetFreeListSize() const;
 
    eC_UInt GetUsedListSize() const;
 
    eC_UInt GetImageSize(const ImageResource_t& eImageID) const;
 
protected:
    CGUIImageCacheImpl(eC_UInt uiCacheSizeLimit, ReplacementPolicyType_t eUsed, ReplacementPolicyType_t eFree);
 
    ~CGUIImageCacheImpl();
 
    eC_Bool FreeSpace(eC_UInt uiSpaceToFree);
 
    eC_Bool LoadImg(const eC_String& psPath, const ImageResource_t& eImageID);
 
    eC_Bool PreloadImg(const eC_String& psPath, const ImageResource_t& eImageID);
 
    eC_Bool UnloadSpecificImage(const ImageResource_t& eImageID);
 
    void MarkAsFree(const ImageResource_t& eImageID);
 
    void MarkAsUsed(const ImageResource_t& eImageID);
 
    void CopyCacheContents(CGUIImageCacheReplacementPolicy* pOldPolicy, CGUIImageCacheReplacementPolicy* pNewPolicy);
 
    void NotifyImageAccessInternal(const ImageResource_t& eImageID);
 
private:
    eC_UInt UnloadImage();
 
    void AddToFreeList(const ImageResource_t& eImageID);
 
    void AddToUsedList(const ImageResource_t& eImageID);
 
    void RemoveFromFreeList(const ImageResource_t& eImageID);
 
    void RemoveFromUsedList(const ImageResource_t& eImageID);
 
    ImageResource_t m_eLastAccessedImage;
 
#ifdef GUI_IMAGECACHE_DEBUG
    eC_UInt m_uiMaxCacheSize;
#endif
};
 
#endif //GUIIMAGECACHEIMPL_H