1 /*

     2 * Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 * SHAPERCACHE.CPP

    16 *

    17 */

    18 

    19 

    20 #include <fntstore.h>

    21 #include <gdi.h>

    22 #include "FNTSTD.H"

    23 #include <graphics/shapeimpl.h>

    24 

    25 const TInt KMaxShaperSesssionCacheMemory = 64*1024;

    26 

    27 //class to store the handle the handle-reference count

    28 class THandleCount

    29 	{

    30 public:

    31 	THandleCount(TInt aSessionHandle)

    32 	:iSessionHandle(aSessionHandle),iRefCount(1),iNext(NULL){}	

    33 public:

    34 	TInt iSessionHandle;

    35 	TInt iRefCount;

    36 	THandleCount* iNext;	

    37 	};

    38 

    39 /******************** SHAPER CACHE CLASSES*************************************/	

    40 class COpenFontShaperCacheEntry: public CBase

    41 	{

    42 public:

    43 	static COpenFontShaperCacheEntry* New(RHeap* aHeap, CShaper::TInput aInput, TShapeHeader* aShapeHeader);

    44 	static COpenFontShaperCacheEntry* New(RHeap* aHeap);

    45 	static void Delete (RHeap* aHeap, COpenFontShaperCacheEntry* aCache);	

    46 	TBool IsSentinel(){return iShapeHeader==NULL;}

    47 	TInt IncRefCount(TInt aSessionHandle);

    48 	TInt DecRefCount(TInt aSessionHandle,TBool aReset=EFalse);	

    49 private:

    50 	COpenFontShaperCacheEntry(RHeap* aHeap,CShaper::TInput aInput)

    51 	:iStart(aInput.iStart),iEnd(aInput.iEnd),iScript(aInput.iScript), iHeap(aHeap){}

    52 	COpenFontShaperCacheEntry(){}

    53 	TInt Construct(CShaper::TInput aInput,TShapeHeader* aShapeHeader);

    54 public:

    55 	COpenFontShaperCacheEntry* iPrevious;	// pointer to previous node in tree

    56 	COpenFontShaperCacheEntry* iNext;		// pointer to next shaping info node in the list

    57 

    58 	/** The shaped information that is cached */

    59 	TShapeHeader* iShapeHeader;

    60 	/** Input information */

    61 	TUint16* iText;

    62 	TInt iStart;

    63 	TInt iEnd;

    64 	TInt iScript;

    65 	/** pointer to a private heap for allocating the handle-refcount array*/

    66 	RHeap* iHeap;

    67 	/** linked list of THandleCount to store the handle-refcount information */

    68 	THandleCount* iHandleRefList;

    69 	TInt iHandleRefCount;

    70 	};

    71 	

    72 /***********************SHAPER CACHE ENDS HERE********************************/

    73