dsa_new.cpp

SDL库 在进行视频显示程序spcaview安装时必须的库文件

#include "dsa.h"
#include "sdlepocapi.h"
#include <cdsb.h>


LOCAL_C TInt BytesPerPixel(TDisplayMode aMode)
	{
	return ((TDisplayModeUtils::NumDisplayModeBitsPerPixel(aMode) - 1) >> 3) + 1; 
	}


NONSHARABLE_CLASS(TDsa)
	{
	public:
		inline TDsa(const CDsa& aDsa);
		inline TBool IsFlip() const;
		inline TBool IsTurn() const;
		inline const TSize& SwSize() const;
		inline void Copy(TUint32* aTarget, const TUint8* aSrc, TInt aBytes, TInt aHeight) const;
	private:
		const CDsa& iDsa;
	};


inline TDsa::TDsa(const CDsa& aDsa) : iDsa(aDsa)
	{	
	}

inline TBool TDsa::IsTurn() const
	{
	return iDsa.iStateFlags & CDsa::EOrientation90;
	}
	
inline TBool TDsa::IsFlip() const
	{
	return iDsa.iStateFlags & CDsa::EOrientation180;
	}	
	
inline const TSize& TDsa::SwSize() const
	{
	return iDsa.SwSize();
	}
		
inline void TDsa::Copy(TUint32* aTarget, const TUint8* aSrc, TInt aBytes, TInt aHeight) const
	{
	iDsa.iCopyFunction(iDsa, aTarget, aSrc, aBytes, aHeight);
	}
	
template<class T, class S>	
void ClipCopy(const TDsa& iDsa, TUint8* aTarget,
 					const TUint8* aSource,
 					const TRect& aUpdateRect,
 					const TRect& aSourceRect)
	{
	const S* source = reinterpret_cast<const S*>(aSource);
	const TInt lineWidth = aSourceRect.Width();
	
	source += (aUpdateRect.iTl.iY * lineWidth); 
	const TInt sourceStartOffset = aUpdateRect.iTl.iX;
	source += sourceStartOffset;
	
	T* targetPtr = reinterpret_cast<T*>(aTarget);
	
	const TInt scanLineWidth = iDsa.SwSize().iWidth;
	
	targetPtr += (aSourceRect.iTl.iY + aUpdateRect.iTl.iY ) * scanLineWidth; 
	const TInt targetStartOffset = (aUpdateRect.iTl.iX + aSourceRect.iTl.iX);
	
	targetPtr += targetStartOffset;
	
	
	const TInt height = aUpdateRect.Height(); 
		
	const TInt lineMove = iDsa.IsTurn() ? 1 : lineWidth;
	const TInt copyLen = aUpdateRect.Width();
	
	
	if(iDsa.IsFlip())
		{
		
		targetPtr += scanLineWidth *  (height - 1);
	
		for(TInt i = 0; i < height; i++) //source is always smaller
			{
			iDsa.Copy(reinterpret_cast<TUint32*>(targetPtr), reinterpret_cast<const TUint8*>(source), copyLen, height);
			source += lineMove;
			targetPtr -= scanLineWidth;
			}
		}
	else
		{
		
		
		for(TInt i = 0; i < height; i++) //source is always smaller
			{
			iDsa.Copy(reinterpret_cast<TUint32*>(targetPtr), reinterpret_cast<const TUint8*>(source), copyLen, height);
			source += lineMove;
			targetPtr += scanLineWidth; // >> 2;
			}
		}

	}
	

  
NONSHARABLE_CLASS(CDsaA) : public CDsa
	{
	public:
		CDsaA(RWsSession& aSession);
	private:
		~CDsaA();
		TUint8* LockSurface();
		void UnlockHWSurfaceRequestComplete();
		void UnlockHwSurface();
		void CreateSurfaceL();
		void Wipe(TInt aLength);
		void Free();
		void Update(CFbsBitmap& aBmp);
		void ConstructL(RWindow& aWindow, CWsScreenDevice& aDevice);
		TInt ExternalUpdate();
	//	void ExternalUpdate();
	protected:
		CFbsBitmap* iBmp;
		CFbsBitmap* iCopyBmp;
	};
	
	
CDsaA::CDsaA(RWsSession& aSession) : CDsa(aSession)
	{
	}
	
	
void CDsaA::Free()
	{
	delete iBmp;
	iBmp = NULL;
	}

CDsaA::~CDsaA()
	{
	__ASSERT_DEBUG(iBmp == NULL, PANIC(KErrNotReady));
	delete iCopyBmp;
	}
	
TUint8* CDsaA::LockSurface()
	{
	iBmp->LockHeap();
	return reinterpret_cast<TUint8*>(iBmp->DataAddress());
	}

void CDsaA::UnlockHWSurfaceRequestComplete()
	{
	PANIC(KErrNotSupported);
	}

void CDsaA::UnlockHwSurface()
	{
	iBmp->UnlockHeap();
	SetUpdating(EFalse);
	Update(*iBmp);
	}
	
void CDsaA::Update(CFbsBitmap& aBmp)
	{
	if(!Blitter(aBmp))
		{
		if(SwSize() == HwRect().Size())
			Dsa().Gc()->BitBlt(HwRect().iTl, &aBmp);
		else
			Dsa().Gc()->DrawBitmap(HwRect(), &aBmp);
		}
	DrawOverlays();
	Dsa().ScreenDevice()->Update();	
	}
void CDsaA::CreateSurfaceL()
	{
	delete iBmp;
	iBmp = NULL;
	iBmp  = new (ELeave) CFbsBitmap();
	User::LeaveIfError(iBmp->Create(SwSize(), DisplayMode()));
	}

void CDsaA::Wipe(TInt aLength) //dont call in drawing
	{
	iBmp->LockHeap();
	Mem::FillZ(iBmp->DataAddress(), aLength);
	iBmp->UnlockHeap();
	}
	

		
TInt CDsaA::ExternalUpdate()
	{
	if(iCopyBmp->Handle() == 0)
		{
		const TInt err = iCopyBmp->Duplicate(iBmp->Handle());
		if(err != KErrNone)
			return err;
		}
	Update(*iCopyBmp);
	return KErrNone;
	}
	
void CDsaA::ConstructL(RWindow& aWindow, CWsScreenDevice& aDevice)		
	{
	iCopyBmp = new (ELeave) CFbsBitmap();
	CDsa::ConstructL(aWindow, aDevice);
	}
	
	
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////

NONSHARABLE_CLASS(MDsbObs)
	{
	public:
		virtual void SurfaceReady() = 0;
		virtual CDirectScreenBitmap& Dsb() = 0;
	};
	
NONSHARABLE_CLASS(CDsbSurface) : public CActive
	{
	public:
		CDsbSurface(MDsbObs& aDsb);
		TUint8* Address();
		void Complete();
		~CDsbSurface();
	private:
		void RunL();
		void DoCancel();
	private:
		MDsbObs& iDsb; 
		TUint8* iAddress;
	};	

CDsbSurface::CDsbSurface(MDsbObs& aDsb) : CActive(CActive::EPriorityHigh) , iDsb(aDsb)
	{
	CActiveScheduler::Add(this);
	}

CDsbSurface::~CDsbSurface()
	{
	Cancel();
	}
	
void CDsbSurface::Complete()
	{
	if(iAddress != NULL && !IsActive())
		{
		iAddress = NULL;
		SetActive();
		iDsb.Dsb().EndUpdate(iStatus);
		}
	}
	
TUint8* CDsbSurface::Address()
	{
	if(iAddress == NULL && !IsActive())
		{
		TAcceleratedBitmapInfo info;
		if(KErrNone == iDsb.Dsb().BeginUpdate(info))
			iAddress = info.iAddress;
		}
	return iAddress;
	}
	
void CDsbSurface::RunL()
	{
	iDsb.SurfaceReady();
	}

void CDsbSurface::DoCancel()
	{
	//empty
	}
		
NONSHARABLE_CLASS(CDsaB) : public CDsa, public MDsbObs
	{
	public:
		CDsaB(RWsSession& aSession, TInt aFlags);
	private:
		~CDsaB();
		TUint8* LockSurface();
		void UnlockHWSurfaceRequestComplete();
		void UnlockHwSurface();
		void CreateSurfaceL();
		void Wipe(TInt aLength);
		void RecreateL();
		void ConstructL(RWindow& aWindow, CWsScreenDevice& aDevice);
		CDirectScreenBitmap& Dsb();
		void SurfaceReady();
		TInt ExternalUpdate();
	private:
		CDsbSurface* iSurface1;
		CDsbSurface* iSurface2;
		CDirectScreenBitmap* iDsb;
		TInt iType;
	};

CDsaB::CDsaB(RWsSession& aSession, TInt aFlags) : CDsa(aSession), iType(aFlags)
	{
	}


	
void CDsaB::UnlockHWSurfaceRequestComplete()
	{
	iSurface1->Complete();
	if(iSurface2 != NULL)
		iSurface2->Complete();
	}	

void CDsaB::CreateSurfaceL()
	{
	__ASSERT_ALWAYS(SwSize() == HwRect().Size(), PANIC(KErrNotSupported));
	}
	
void CDsaB::Wipe(TInt aLength) //dont call in drawing
	{
	TUint8* addr = LockSurface();
	if(addr != NULL) 
		{
		Mem::FillZ(addr, aLength);
		UnlockHwSurface();
		}
	}
	

void CDsaB::UnlockHwSurface()
	{
	EpocSdlEnv::Request(CDsa::ERequestUpdate);
	}
	
TUint8* CDsaB::LockSurface()
	{
	TUint8* addr =  iSurface1->Address();
	if(addr == NULL && iSurface2 != NULL)
		addr =  iSurface2->Address();
	SetUpdating(addr == NULL);
	return addr;
	}
	
void CDsaB::SurfaceReady()	
	{
	SetUpdating(EFalse);
	}

CDirectScreenBitmap& CDsaB::Dsb()
	{
	return *iDsb;
	}
	
void CDsaB::ConstructL(RWindow& aWindow, CWsScreenDevice& aDevice)
	{
	if(iDsb == NULL)
		iDsb = CDirectScreenBitmap::NewL();	
	CDsa::ConstructL(aWindow, aDevice);
	if(iSurface1 == NULL)	
		iSurface1 = new (ELeave) CDsbSurface(*this);
	if(iSurface2 == NULL && iType & CDirectScreenBitmap::EDoubleBuffer)
		iSurface2 = new (ELeave) CDsbSurface(*this);
	}
	
CDsaB::~CDsaB()
	{
	delete iSurface1;
	delete iSurface2;
	delete iDsb;
	}	

void CDsaB::RecreateL()
	{
    iDsb->Close();
    iDsb->Create(HwRect(), CDirectScreenBitmap::TSettingsFlags(iType));
	}
	
TInt CDsaB::ExternalUpdate()
	{
	if(LockSurface())
		{
		UnlockHWSurfaceRequestComplete();
		return KErrNone;
		}
	return KErrNotReady;
	}
		

/////////////////////////////////////////////////////////////////////////////////////////////////////	


CDsa* CDsa::CreateL(RWsSession& aSession)
	{
	if(EpocSdlEnv::Flags(CSDL::EDrawModeDSB))
		{
		TInt flags = CDirectScreenBitmap::ENone;
		if(EpocSdlEnv::Flags(CSDL::EDrawModeDSBDoubleBuffer))
			flags |= CDirectScreenBitmap::EDoubleBuffer;
		if(EpocSdlEnv::Flags(CSDL::EDrawModeDSBIncrentalUpdate))
			flags |= CDirectScreenBitmap::EIncrementalUpdate;
		return new (ELeave) CDsaB(aSession, flags);
		}
    else
        return new (ELeave) CDsaA(aSession);
	}   
	
	
void CDsa::RecreateL()
	{
	}

void CDsa::Free()
	{
	}
	
TSize CDsa::WindowSize() const
	{
	TSize size = iSwSize;
	if(iStateFlags & EOrientation90)
		{
		const TInt tmp = size.iWidth;
		size.iWidth = size.iHeight;
		size.iHeight = tmp;
		}
	return size;
	}
	
void CDsa::SetSuspend()
	{
	iStateFlags |= ESdlThreadSuspend;
	}

void CDsa::ReleaseStop()
	{
	iStateFlags &= ~ESdlThreadExplicitStop;
	}


TBool CDsa::Stopped() const
	{
	return (iStateFlags & ESdlThreadExplicitStop);
	}

void CDsa::SetOrientation(CSDL::TOrientationMode aOrientation)
	{
	TInt flags = 0;
	switch(aOrientation)
		{
		case CSDL::EOrientation90:
			flags = EOrientation90;
			break;
		case CSDL::EOrientation180:
			flags = EOrientation180;
			break;
		case CSDL::EOrientation270:
			flags = EOrientation90 | EOrientation180;
			break;
		case CSDL::EOrientation0:
			flags = 0;
			break;
		}
	if(flags != (iStateFlags & EOrientationFlags))
		{
		iStateFlags |= EOrientationChanged;
		iNewFlags = flags; //cannot be set during drawing...
		}
	}

CDsa::~CDsa()
    {
    if(iDsa != NULL)
        {
        iDsa->Cancel();
        }
    iOverlays.Close();
    delete iDsa;
    User::Free(iLut256);
    }
         
void CDsa::ConstructL(RWindow& aWindow, CWsScreenDevice& aDevice)
    {
    if(iDsa != NULL)
    	{
    	iDsa->Cancel();