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