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// Copyright (c) 2008-2009 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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//
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/**
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@file
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@internalComponent
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*/
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#ifndef MMFSUBTITLEGRAPHICDRAWER_H
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#define MMFSUBTITLEGRAPHICDRAWER_H
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#include <bitstd.h>
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#include <graphics/wsgraphicdrawer.h>
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#include <graphics/wsgraphicdrawerinterface.h>
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#include "mmfsubtitlegraphicmessage.h"
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/**
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* Forward declarations
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*/
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class TSubtitleGraphicState;
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/**
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Defines the MMF subtitle graphic drawer CRP component. Used to display subtitles
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over video content.
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*/
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NONSHARABLE_CLASS(CMMFSubtitleGraphicDrawer): public CWsGraphicDrawer
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{
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public:
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enum {EImplUid = 0x10285C9C};
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public:
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virtual ~CMMFSubtitleGraphicDrawer();
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static CMMFSubtitleGraphicDrawer* NewL();
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// From CwsGraphicDrawer
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void ConstructL(MWsGraphicDrawerEnvironment& aEnv,const TGraphicDrawerId& aId, MWsClient& aOwner, const TDesC8& aData);
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virtual void HandleMessage(const TDesC8& aData);
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virtual void DoDraw(MWsGc& aGc, const TRect& aRect, const TDesC8& aData) const;
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private:
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// Message handling..
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void ProcessMessageInit(TSubtitleCrpMsgInit& aMessage);
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void ProcessMessageDrawFrame(TSubtitleCrpMsgDrawFrame& aMessage);
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void ProcessMessageSwapFrame(TSubtitleCrpMsgRenderSwapFrame& aMessage);
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void DoBitBlt(MWsGc& aGc, const TRect& aRect) const;
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private:
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enum TSubtitleGraphicState
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{
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ESubtitleGraphicStateWaiting = 0,
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ESubtitleGraphicStateInit = 10,
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ESubtitleGraphicStateInitSimple = 20,
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ESubtitleGraphicStateDrawFrame = 30,
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ESubtitleGraphicStateRefreshContent = 40,
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ESubtitleGraphicStateSwapFrame = 50,
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ESubtitleGraphicStateClear = 60
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};
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enum TSubtitleGraphicFrame
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{
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ESubtitleGraphicFrame1 = 1,
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ESubtitleGraphicFrame2 = 2,
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ESubtitleGraphicFrame3 = 3
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};
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private:
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/**
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Handles to subtitle frames.
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Used for double-buffered rendering approach
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@see CWsInterleaveGraphicDrawer::ProcessMessageInit()
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*/
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CFbsBitmap* iBitmap1;
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CFbsBitmap* iBitmap2;
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/**
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Used to store one-off subtitle rendering requests
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@see CWsInterleaveGraphicDrawer::ProcessMessageDrawFrame()
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*/
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CFbsBitmap* iTempBitmap;
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/**
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Status of current bitmap handles. Stored here for effeciency as they are
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checked every DoDraw() call.
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*/
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TBool iBitmap1Valid;
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TBool iBitmap2Valid;
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TBool iTempBitmapValid;
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/**
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Indicates the current frame. This is the buffer that will be drawn
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on the next call to @see SwapFrame() or when WServ invalidates a sub-portion
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of the screen
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ESubtitleGraphicFrame1: @see iBitmapHandle1
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ESubtitleGraphicFrame2: @see iBitmapHandle2
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ESubtitleGraphicFrame3: @see iTempBitmapHandle
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*/
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TSubtitleGraphicFrame iCurrentFrame;
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/**
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Indicates the region of the current bitmap that contains new image data
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*/
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TRect iDirtyRegion;
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/**
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Stores the previous frames dirty region.
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*/
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TRect iOldDirtyRegion;
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/**
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The current CRP region stored on the first call to DoDraw()
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*/
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mutable TRect iSubtitleRegion;
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/**
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Indicates how long the current frame should be displayed for
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*/
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TTimeIntervalMicroSeconds iDisplayDuration;
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/**
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Indicates the system time that the current frame expires. Calculated
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from the current system time and the display duration given on a
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ESubtitleGraphicStateDrawFrame/ESubtitleGraphicStateSwapFrame frame message.
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*/
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mutable TTime iDisplayClearDue;
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/**
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The current CRP state
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*/
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mutable TSubtitleGraphicState iState;
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mutable TBool iCaptureRegion;
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};
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#endif
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