FontCache.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.
*/
 
#ifndef __FONTCACHE_H__
#define __FONTCACHE_H__
 
#include "eC_Types.h"
#include "eC_TArray.h"
 
#include "GUIImageData.h"
#include "GUIFontResource.h"
 
 
class CFontCache
{
public:
    struct CachedCharInfo_t
    {
        CachedCharInfo_t() :
            m_iBitmapGlyphLeft(0),
            m_iBitmapGlyphTop(0),
            m_iBitmapRows(0),
            m_iBitmapWidth(0),
            m_uiWidth(0),
            m_uiTimestamp(0),
            m_uiXAdvance(0),
            m_pkImageData(NULL)
        {}
 
        eC_Int  m_iBitmapGlyphLeft; 
        eC_Int  m_iBitmapGlyphTop; 
        eC_Int  m_iBitmapRows; 
        eC_Int  m_iBitmapWidth; 
        eC_UInt m_uiWidth; 
        eC_UInt m_uiTimestamp; 
        eC_UInt m_uiXAdvance; 
        CGUIImageData* m_pkImageData; 
    };
 
    struct CachedChar_t
    {
        CachedChar_t() :
            m_uiUnicode(0),
            m_pkInfo(NULL)
        {}
 
        eC_UInt m_uiUnicode; 
        CachedCharInfo_t* m_pkInfo; 
    };
 
public:
    CFontCache(
        const FontResource_t& eFontID,
        const eC_UInt& uiInitialCacheSize,
        const eC_Bool& bAutoResize,
        const eC_UInt& uiResizeBy);
 
    virtual ~CFontCache();
 
    CachedChar_t GetChar(const eC_UInt &uiUnicode);
 
    inline eC_Int GetHeight() const { return m_iHeight; }
 
    inline eC_Int GetAscender() const { return m_iAscender; }
 
    inline eC_Int GetDescender() const { return m_iDescender; }
 
    inline eC_Int GetInternalLeading() const { return m_iInternalLeading; }
 
    void* GetFace() { return m_pkFace; }
 
protected:
    virtual CachedChar_t AddChar(const eC_UInt &uiUnicode, const eC_UInt &uiPos) = 0;
 
    virtual void RemoveChar(const eC_UInt &uiPos);
 
    eC_Int FindChar(const eC_UInt &uiUnicode);
 
    void Swap(CachedChar_t* pPosA, CachedChar_t* pPosB);
 
    void Sort();
 
    eC_UInt FindLowestTimestampPos();
 
    CFontCache(const CFontCache& kSource);
 
    CFontCache& operator=(const CFontCache& kSource);
 
protected:
    FontResource_t m_eFontID; 
    eC_Int m_iAscender; 
    eC_Int m_iDescender; 
    eC_Int m_iInternalLeading; 
    eC_Int m_iHeight; 
    eC_UInt m_uiNextGlyphIndex; 
    eC_Bool m_bUseTimeStamp; 
    eC_UInt m_uiTimer; 
 
    eC_Bool m_bAutoResize; 
    eC_UInt m_uiResizeBy; 
 
    eC_TArray<CachedChar_t> m_asCache; 
 
    eC_Bool m_bArrayNeedsSorting; 
    void* m_pkFace; 
};
 
#endif