uiacceltk/hitchcock/Client/src/alfscreenbuffer.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Mon, 15 Mar 2010 12:43:37 +0200
branchRCL_3
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permissions -rw-r--r--
Revision: 201010 Kit: 201010
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/*
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* Copyright (c) 2006 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:   Screen buffer implementation
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*
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*/
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#include <coemain.h>
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#include "alflogger.h"
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#include "alf/alfenv.h"
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#include "alfclient.h"
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#include "alf/alfstatic.h"
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#include "alf/alfconstants.h"
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#include "alfuids.h"
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#include "alf/alfscreenbuffer.h"
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#include "alf/alfsymbiansbdrawer.h"
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#include <uiacceltk/HuiUtil.h>
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// *** class CAlfScreenBufferEventFetcher
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NONSHARABLE_CLASS(CAlfScreenBufferEventFetcher): public CActive
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    {
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public: // Struct
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    struct TScreenBufferInfo
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    	{
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    	MAlfScreenBufferObserver* iObserver; // Observer for this screen buffer. Not owned
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    	TUid iBufferUid; // Uid of the buffer to be observed.
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    	TInt iPriority;  // Priority of the buffer. Not yet used.
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    	TInt iBitmapHandle; // Handle to the shared CFbsBitmap that contains the buffer.
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    	TInt iMaskHandle; // Mask handle
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    	TRect iLastDisplayRect; // Display rect
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    	TRect iLastDirtyRect; // Dirty rect  	
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    	};
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public: // New methods
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    CAlfScreenBufferEventFetcher(RAlfClient& aClient, MAlfScreenBufferObserver& aScreenBufferObs)
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        :CActive(CActive::EPriorityHigh), iClient(aClient), iEventAsDescriptor(iEvent)        
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        {
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        CAlfScreenBufferEventFetcher::TScreenBufferInfo info = {&aScreenBufferObs, KNullUid, 0, 0, 0, TRect(), TRect()};
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        iBufferInfo = info;
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        CActiveScheduler::Add(this);
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        }
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    ~CAlfScreenBufferEventFetcher()
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        {
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        Cancel();
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        }
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	// Request a new event
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	void RequestBufferEvent()       
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        {
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        if(!IsActive())
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            {
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            SetActive();
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        	iEvent.iBufferUid = iBufferInfo.iBufferUid;
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        	iEvent.iEventId = 0;
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        	iEvent.iDisplayRect = TRect();
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        	iEvent.iDirtyRect = TRect();
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    		iClient.SendAsyncCmd(EAlfSBufRequestEvent, iEventAsDescriptor, iStatus); 
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            }
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        }
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    // Return buffer info    
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    TScreenBufferInfo& ScreenBufferInfo()
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    	{
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    	return(iBufferInfo);
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    	}
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private: // From CActive
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    void RunL()
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        {
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        if(iStatus.Int() != KErrNone)
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           	{ 
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           	USER_INVARIANT();            	
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           	}
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        // Issue a new event request first             
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        TAlfScreenBufferEvent event = iEvent;
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		RequestBufferEvent();   
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		// Handle event
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		if (event.iEventId == MAlfScreenBufferObserver::ENone) // Buffer complete event    
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			{
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        	if (iBufferInfo.iObserver->BufferComplete(event.iBufferUid, event.iDisplayRect, event.iDirtyRect))
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        		{
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        		// Request next  buffer automatically
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   			    TUid uidEvent = event.iBufferUid; 
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    			TPckg<TUid> eventPckg(uidEvent);
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    			iClient.SendSyncCmd(EAlfSBufRequestNextBuffer, eventPckg);
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        		}
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			}
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		else     
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			{
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			if (event.iEventId == MAlfScreenBufferObserver::ECreated)
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				{
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		   		// Add this buffer observer again to the array in Alf Server to get valid bitmap handles in return. 
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    			TAlfScreenBufferBitmaps addObserverEvent = {iBufferInfo.iBufferUid, iBufferInfo.iPriority, NULL, NULL}; 
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    			TPckg<TAlfScreenBufferBitmaps> eventPckg(addObserverEvent);
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    			iClient.SendSyncCmd(EAlfSBufAddObserver, eventPckg);
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    			// Update bitmap handles
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    			iBufferInfo.iBitmapHandle = addObserverEvent.iBitmapHandle; 
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    			iBufferInfo.iMaskHandle = addObserverEvent.iMaskHandle;			
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				}
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			else if (event.iEventId == MAlfScreenBufferObserver::EDeleted)
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				{
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    			// Invalidate bitmap handles
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    			iBufferInfo.iBitmapHandle = NULL; 
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    			iBufferInfo.iMaskHandle = NULL;							
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				}
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        	iBufferInfo.iObserver->HandleScreenBufferEvent(event.iBufferUid, event.iEventId);			
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			}
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        }
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    void DoCancel()
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        {
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    	// Remove this AO from the observer array in Alf Server
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    	TAlfScreenBufferBitmaps event = {iBufferInfo.iBufferUid, 0, 0}; 
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    	TPckg<TAlfScreenBufferBitmaps> eventPckg(event);
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    	iClient.SendSyncCmd(EAlfSBufRemoveObserver, eventPckg);
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        }
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    TInt RunError(TInt /*aError*/)
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        {
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        // Ignore error
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        return KErrNone;
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        }
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private: // Data
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    RAlfClient& iClient;
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    TAlfScreenBufferEvent iEvent; // Event data for pending buffer event. 
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    TPckg<TAlfScreenBufferEvent> iEventAsDescriptor;
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    CAlfScreenBufferEventFetcher::TScreenBufferInfo iBufferInfo; // Buffer information
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    };
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   158
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// *** Array item for CAlfScreenBuffer
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struct TAlfScreenBufferHandlerItem
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	{
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	TAlfScreenBufferHandlerItem( TInt aId, CAlfScreenBufferEventFetcher* aAoPtr) 
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		:iId( aId ), iAoPtr( aAoPtr )
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		{};
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	TInt iId; // Buffer uid
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	CAlfScreenBufferEventFetcher* iAoPtr; // Pointer to the active object that handles buffer events. Owned.
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	};
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// *** Private data for CAlfScreenBuffer
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NONSHARABLE_CLASS(CAlfScreenBuffer::CPrivateData):public CBase
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    {
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    public:
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    ~CPrivateData()
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        {
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        iScreenBufferHandlers.Close();
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        if (iIsAlfEnvOwned)
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        	{
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        	delete(iEnv);
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        	}
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        }
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    CAlfEnv* iEnv;   
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    TBool iIsAlfEnvOwned; 
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    RArray<TAlfScreenBufferHandlerItem> iScreenBufferHandlers; // List of all buffer observer Active Objects
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    };
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// *** class CAlfScreenBuffer
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EXPORT_C CAlfScreenBuffer* CAlfScreenBuffer::NewL()
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	{
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	// Create own aAlf env if it does not exist.
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	TBool isAlfEnvOwned = EFalse; 
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	CAlfEnv* env = CAlfEnv::Static();
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	if (!env)
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		{
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		isAlfEnvOwned = ETrue;
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		env = CAlfEnv::NewL();
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		}
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	// Create object	
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    CAlfScreenBuffer* self = new( ELeave ) CAlfScreenBuffer();
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    CleanupStack::PushL( self );        
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    self->ConstructL(env, isAlfEnvOwned);
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    CleanupStack::Pop( self );
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    return self;	
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	};
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EXPORT_C CAlfScreenBuffer* CAlfScreenBuffer::NewL(CAlfEnv& aEnv)
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	{
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    CAlfScreenBuffer* self = new( ELeave ) CAlfScreenBuffer();
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    CleanupStack::PushL( self );        
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    self->ConstructL(&aEnv, EFalse);
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    CleanupStack::Pop( self );
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    return self;	
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	};
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CAlfScreenBuffer::CAlfScreenBuffer()
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	{	
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	}
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// @deprecated
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EXPORT_C CAlfScreenBuffer::CAlfScreenBuffer(CAlfEnv& /*aEnv*/) 
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	{	
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	}
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EXPORT_C CAlfScreenBuffer::~CAlfScreenBuffer()
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	{
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    for (TInt i = iData->iScreenBufferHandlers.Count()-1; i >= 0 ; i--)
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   		{
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        RemoveObserver(iData->iScreenBufferHandlers[i].iAoPtr->ScreenBufferInfo().iBufferUid);
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        }
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    delete iData;
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	}
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// @deprecated
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EXPORT_C void CAlfScreenBuffer::ConstructL()
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    {
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    // Not used, preserved for BC
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    }
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void CAlfScreenBuffer::ConstructL(CAlfEnv* aEnv, TBool aIsAlfEnvOwned)
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    {
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    //@todo : should I check that only one instance is created per alf client? 
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    // Create private data
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    iData = new (ELeave) CPrivateData; 
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    iData->iEnv = aEnv;
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    iData->iIsAlfEnvOwned = aIsAlfEnvOwned;
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    }
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   258
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EXPORT_C MAlfBufferDrawer* CAlfScreenBuffer::GetDrawingInterface(TUid aInterfaceUid, TUid aBufferUid)
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	{
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	// Symbian IF
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	if (aInterfaceUid == KAlfSymbianBufferDrawerUid)
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	    {
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	    TAlfScreenBufferHandlerItem item( aBufferUid.iUid, NULL );
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	    TInt index;
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	    if ( iData->iScreenBufferHandlers.FindInSignedKeyOrder( item, index ) == KErrNone )
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		    {
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		    if (iData->iScreenBufferHandlers[index].iAoPtr->ScreenBufferInfo().iBitmapHandle)
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		    	{
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       	    	CAlfSymbianBufferDrawer* drawer = NULL;
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       	    	TRAPD(err, drawer = CAlfSymbianBufferDrawer::NewL());
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       	    	if (!err)
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       	    		{
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                	TRAP(err,drawer->SetBufferL(
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                		iData->iScreenBufferHandlers[index].iAoPtr->ScreenBufferInfo().iBitmapHandle,
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                		iData->iScreenBufferHandlers[index].iAoPtr->ScreenBufferInfo().iMaskHandle));
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                	if (err)
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                		{
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                		delete drawer;
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                		return NULL;
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                		}
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                	else
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                		{
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                		return drawer;
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                		}	
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            		}   
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		    	}
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	        }
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	    }
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	return NULL;	            
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	}
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   292
	
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   293
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EXPORT_C MAlfBufferGc* CAlfScreenBuffer::GetGraphicsContext(TUid /*aInterfaceUid*/, TUid /*aBufferUid*/)  
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	{	
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	return ((MAlfBufferGc*)NULL);
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   297
	}
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   298
      
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   299
        
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EXPORT_C void CAlfScreenBuffer::AddObserverL(TUid aBufferId, MAlfScreenBufferObserver* aObserver, TInt aPriority) 
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	{
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   302
	AddObserverL(aBufferId, CAlfScreenBuffer::EFlagNone, aObserver, aPriority); 
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   303
	}
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   304
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   305
	
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   306
EXPORT_C void CAlfScreenBuffer::AddObserverL(TUid aBufferId, TUint aFlags, MAlfScreenBufferObserver* aObserver, TInt aPriority) 
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	{    
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   308
    // Add to the observer array in Alf Server, and get bitmap handles in return. 
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   309
    TAlfScreenBufferBitmaps event = {aBufferId, aPriority, aFlags, NULL, NULL}; 
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   310
    TPckg<TAlfScreenBufferBitmaps> eventPckg(event);
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   311
    User::LeaveIfError(iData->iEnv->Client().SendSyncCmd(EAlfSBufAddObserver, eventPckg)); 
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   312
    
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  	// Append the handler to the client list
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   314
   	CAlfScreenBufferEventFetcher* eventFetcher =  new (ELeave) CAlfScreenBufferEventFetcher(iData->iEnv->Client(), *aObserver);
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   315
   	CAlfScreenBufferEventFetcher::TScreenBufferInfo info = {eventFetcher->ScreenBufferInfo().iObserver, event.iBufferUid, aPriority, event.iBitmapHandle, event.iMaskHandle, TRect(), TRect()};
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   	eventFetcher->ScreenBufferInfo() = info;    
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   317
   	// Transfers ownership of eventFetcher
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   318
    TInt err = iData->iScreenBufferHandlers.InsertInUnsignedKeyOrder(TAlfScreenBufferHandlerItem(aBufferId.iUid, eventFetcher)); 
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   319
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   320
    if (err)
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diff changeset
   321
    	{
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   322
    	delete eventFetcher;
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   323
    	RemoveObserver(aBufferId); 
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   324
    	User::Leave(err);
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   325
    	}
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   326
    else
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   327
    	{
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   328
    	// Start observing any event 
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   329
    	eventFetcher->RequestBufferEvent(); 
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   330
    	}	
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   331
	}
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   332
	
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diff changeset
   333
	
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   334
// Note: This can be also called to already removed observers. In that case it has no effect. 
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   335
EXPORT_C void CAlfScreenBuffer::RemoveObserver(TUid aBufferId) 
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   336
	{	
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   337
    // Remove from the observer array in Alf Server
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   338
    TAlfScreenBufferBitmaps event = {aBufferId, 0, 0}; 
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   339
    TPckg<TAlfScreenBufferBitmaps> eventPckg(event);
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   340
    iData->iEnv->Client().SendSyncCmd(EAlfSBufRemoveObserver, eventPckg); 
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   341
     
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   342
  	// Remove the handler from the client list
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   343
   	TAlfScreenBufferHandlerItem item( aBufferId.iUid, NULL );
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   344
	TInt index;
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   345
	if ( iData->iScreenBufferHandlers.FindInSignedKeyOrder( item, index ) == KErrNone )
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   346
		{
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   347
		delete(iData->iScreenBufferHandlers[index].iAoPtr);
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   348
		iData->iScreenBufferHandlers.Remove(index);
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   349
		}
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   350
	}
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   351
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   352
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   353
EXPORT_C void CAlfScreenBuffer::RequestNextBuffer(TUid aBufferId)       
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   354
	{
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   355
   	TAlfScreenBufferHandlerItem item( aBufferId.iUid, NULL );
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   356
	TInt index;
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   357
	if ( iData->iScreenBufferHandlers.FindInSignedKeyOrder( item, index ) == KErrNone )
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   358
		{
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   359
	    TUid event = aBufferId; 
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   360
    	TPckg<TUid> eventPckg(event);
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   361
    	iData->iEnv->Client().SendSyncCmd(EAlfSBufRequestNextBuffer, eventPckg);
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   362
		}
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   363
	else
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   364
		{
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   365
		// I am not a listener for this buffer 
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   366
		__ALFLOGSTRING1( "CAlfScreenBuffer::RequestNextBuffer(). Observer not found for uid %x", aBufferId.iUid );
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   367
		}
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   368
	}
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   369
    
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   370
    
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   371
EXPORT_C void CAlfScreenBuffer::RequestBufferDraw(TUid aBufferId)       
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   372
	{
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   373
   	TAlfScreenBufferHandlerItem item( aBufferId.iUid, NULL );
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   374
	TInt index;
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   375
	if ( iData->iScreenBufferHandlers.FindInSignedKeyOrder( item, index ) == KErrNone )
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   376
		{
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   377
	    TUid event = aBufferId; 
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   378
    	TPckg<TUid> eventPckg(event);
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   379
    	iData->iEnv->Client().SendSyncCmd(EAlfSBufRequestBufferDraw, eventPckg);
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   380
		}
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   381
	else
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   382
		{
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   383
		// I am not a listener for this buffer 
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   384
		__ALFLOGSTRING1( "CAlfScreenBuffer::RequestNextBuffer(). Observer not found for uid %x", aBufferId.iUid );
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   385
		}
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   386
	}
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   387
    
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   388
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   389
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   390
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   391
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   392
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   393
15bf7259bb7c Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   394