fontservices/fontstore/src/ShaperCache.H
changeset 0 1fb32624e06b
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/fontservices/fontstore/src/ShaperCache.H	Tue Feb 02 02:02:46 2010 +0200
@@ -0,0 +1,73 @@
+/*
+* Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description: 
+* SHAPERCACHE.CPP
+*
+*/
+
+
+#include <fntstore.h>
+#include <gdi.h>
+#include "FNTSTD.H"
+#include <graphics/shapeimpl.h>
+
+const TInt KMaxShaperSesssionCacheMemory = 64*1024;
+
+//class to store the handle the handle-reference count
+class THandleCount
+	{
+public:
+	THandleCount(TInt aSessionHandle)
+	:iSessionHandle(aSessionHandle),iRefCount(1),iNext(NULL){}	
+public:
+	TInt iSessionHandle;
+	TInt iRefCount;
+	THandleCount* iNext;	
+	};
+
+/******************** SHAPER CACHE CLASSES*************************************/	
+class COpenFontShaperCacheEntry: public CBase
+	{
+public:
+	static COpenFontShaperCacheEntry* New(RHeap* aHeap, CShaper::TInput aInput, TShapeHeader* aShapeHeader);
+	static COpenFontShaperCacheEntry* New(RHeap* aHeap);
+	static void Delete (RHeap* aHeap, COpenFontShaperCacheEntry* aCache);	
+	TBool IsSentinel(){return iShapeHeader==NULL;}
+	TInt IncRefCount(TInt aSessionHandle);
+	TInt DecRefCount(TInt aSessionHandle,TBool aReset=EFalse);	
+private:
+	COpenFontShaperCacheEntry(RHeap* aHeap,CShaper::TInput aInput)
+	:iStart(aInput.iStart),iEnd(aInput.iEnd),iScript(aInput.iScript), iHeap(aHeap){}
+	COpenFontShaperCacheEntry(){}
+	TInt Construct(CShaper::TInput aInput,TShapeHeader* aShapeHeader);
+public:
+	COpenFontShaperCacheEntry* iPrevious;	// pointer to previous node in tree
+	COpenFontShaperCacheEntry* iNext;		// pointer to next shaping info node in the list
+
+	/** The shaped information that is cached */
+	TShapeHeader* iShapeHeader;
+	/** Input information */
+	TUint16* iText;
+	TInt iStart;
+	TInt iEnd;
+	TInt iScript;
+	/** pointer to a private heap for allocating the handle-refcount array*/
+	RHeap* iHeap;
+	/** linked list of THandleCount to store the handle-refcount information */
+	THandleCount* iHandleRefList;
+	TInt iHandleRefCount;
+	};
+	
+/***********************SHAPER CACHE ENDS HERE********************************/
+