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62 lines
1019 B
62 lines
1019 B
/* _KERN.H
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*
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* Purpose:
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* Latin pair-kerning cache.
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*
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* Authors:
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* Keith Curtis
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*
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* Copyright (c) 1995-2000, Microsoft Corporation. All rights reserved.
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*/
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#include "_array.h"
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struct KPE
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{
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WCHAR chFirst;
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WCHAR chSecond;
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short du;
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};
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typedef unsigned int KERNHASHKEY;
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enum KernCacheInitState
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{
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Unitialized, //Don't know if there are kerning pairs
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Initialized, //There are kerning pairs
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NoKerningPairs //No kerning pairs found
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};
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class CKernCache
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{
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public:
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CKernCache::CKernCache()
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{
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_kcis = Unitialized;
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}
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BOOL FInit(HFONT hfont);
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void Free(void)
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{
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_pmpkpe.Clear(AF_DELETEMEM);
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}
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void Add(WCHAR chFirst, WCHAR chSecond, LONG du);
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LONG FetchDup(WCHAR chFirst, WCHAR chSecond, long dvpFont);
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private:
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void Init(HFONT hfont);
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inline int Hash(KERNHASHKEY kernhashkey)
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{
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return kernhashkey % _pmpkpe.Count();
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}
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static inline KERNHASHKEY MakeHashKey(WCHAR chFirst, WCHAR chSecond)
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{
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return chFirst | (chSecond << 16);
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}
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CArray<KPE> _pmpkpe;
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KernCacheInitState _kcis;
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};
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