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/*
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* Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:
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* SHAPERCACHE.CPP
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*
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*/
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#include <fntstore.h>
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#include <gdi.h>
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#include "FNTSTD.H"
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#include <graphics/shapeimpl.h>
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const TInt KMaxShaperSesssionCacheMemory = 64*1024;
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//class to store the handle the handle-reference count
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class THandleCount
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{
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public:
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THandleCount(TInt aSessionHandle)
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:iSessionHandle(aSessionHandle),iRefCount(1),iNext(NULL){}
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public:
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TInt iSessionHandle;
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TInt iRefCount;
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THandleCount* iNext;
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};
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/******************** SHAPER CACHE CLASSES*************************************/
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class COpenFontShaperCacheEntry: public CBase
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{
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public:
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static COpenFontShaperCacheEntry* New(RHeap* aHeap, CShaper::TInput aInput, TShapeHeader* aShapeHeader);
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static COpenFontShaperCacheEntry* New(RHeap* aHeap);
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static void Delete (RHeap* aHeap, COpenFontShaperCacheEntry* aCache);
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TBool IsSentinel(){return iShapeHeader==NULL;}
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TInt IncRefCount(TInt aSessionHandle);
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TInt DecRefCount(TInt aSessionHandle,TBool aReset=EFalse);
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private:
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COpenFontShaperCacheEntry(RHeap* aHeap,CShaper::TInput aInput)
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:iStart(aInput.iStart),iEnd(aInput.iEnd),iScript(aInput.iScript), iHeap(aHeap){}
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COpenFontShaperCacheEntry(){}
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TInt Construct(CShaper::TInput aInput,TShapeHeader* aShapeHeader);
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public:
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COpenFontShaperCacheEntry* iPrevious; // pointer to previous node in tree
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COpenFontShaperCacheEntry* iNext; // pointer to next shaping info node in the list
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/** The shaped information that is cached */
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TShapeHeader* iShapeHeader;
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/** Input information */
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TUint16* iText;
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TInt iStart;
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TInt iEnd;
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TInt iScript;
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/** pointer to a private heap for allocating the handle-refcount array*/
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RHeap* iHeap;
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/** linked list of THandleCount to store the handle-refcount information */
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THandleCount* iHandleRefList;
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TInt iHandleRefCount;
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};
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/***********************SHAPER CACHE ENDS HERE********************************/
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