dsa_old.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(CDsaA) : public CDsa
	{
	public:
		CDsaA(RWsSession& aSession);
	private:
		~CDsaA();
		TUint8* LockSurface();
		void UnlockHWSurfaceRequestComplete();
		void UnlockHwSurface();
		void CreateSurfaceL();
		void Wipe(TInt aLength);
		void RecreateL();
		void Free();
		TInt ExternalUpdate() {return 0;}
	private:
		CFbsBitmap* iBmp;	
	};
	
	
CDsaA::CDsaA(RWsSession& aSession) : CDsa(aSession)
	{
	}
	
void CDsaA::Free()
	{
	delete iBmp;
	iBmp = NULL;
	}

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

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

void CDsaA::UnlockHwSurface()
	{
	iBmp->UnlockHeap();
	SetUpdating(EFalse);
	Dsa().Gc()->BitBlt(HwRect().iTl, iBmp);
	Dsa().ScreenDevice()->Update();
	}

void CDsaA::CreateSurfaceL()
	{
	delete iBmp;
	iBmp = NULL;
	iBmp  = new (ELeave) CFbsBitmap();
	User::LeaveIfError(iBmp->Create(HwRect().Size(), DisplayMode()));
	}

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

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

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);
	private:
		~CDsaB();
		TUint8* LockSurface();
		void UnlockHWSurfaceRequestComplete();
		void UnlockHwSurface();
		void CreateSurfaceL();
		void Wipe(TInt aLength);
		void RecreateL();
		void ConstructL(RWindow& aWindow, CWsScreenDevice& aDevice);
		void Free();
		CDirectScreenBitmap& Dsb();
		void SurfaceReady();
		TInt ExternalUpdate() {return 0;}
	private:
		CDsbSurface* iSurface1;
		CDsbSurface* iSurface2;
		CDirectScreenBitmap* iDsb;
	};

CDsaB::CDsaB(RWsSession& aSession) : CDsa(aSession)
	{
	}

void CDsaB::Free()
	{
	}
	
void CDsaB::UnlockHWSurfaceRequestComplete()
	{
	iSurface1->Complete();
	iSurface2->Complete();
	}	

void CDsaB::CreateSurfaceL()
	{
	}
	
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)
		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);
	iSurface1 = new (ELeave) CDsbSurface(*this);
	iSurface2 = new (ELeave) CDsbSurface(*this);
	}
	
CDsaB::~CDsaB()
	{
	delete iSurface1;
	delete iSurface2;
	delete iDsb;
	}	

void CDsaB::RecreateL()
	{
    iDsb->Close();
    iDsb->Create(HwRect(), CDirectScreenBitmap::EDoubleBuffer);
	}

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


TSize CDsa::WindowSize() const
	{
	TSize size = HwRect().Size();
	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();
        }
    delete iDsa;
    User::Free(iLut256);
    }
         
void CDsa::ConstructL(RWindow& aWindow, CWsScreenDevice& aDevice)
    {
    if(iDsa != NULL)
    	{
    	iDsa->Cancel();
    	delete iDsa;
    	iDsa = NULL;
    	}
    	
    	
    iDsa = CDirectScreenAccess::NewL(
    				iSession,
					aDevice,
					aWindow,
					*this);				

	if(iLut256 == NULL)
		iLut256 = (TUint32*) User::AllocL(256 * sizeof(TUint32));
	iTargetMode = aWindow.DisplayMode();
	iTargetBpp = BytesPerPixel(DisplayMode());
	iTargetRect = TRect(aWindow.Position(), aWindow.Size());
    RestartL();
    }

void CDsa::LockPalette(TBool aLock)
	{
	if(aLock)
		iStateFlags |= EPaletteLocked;
	else
		iStateFlags &= ~EPaletteLocked;
	}
TInt CDsa::SetPalette(TInt aFirst, TInt aCount, TUint32* aPalette)
	{
	if(iLut256 == NULL)
		return KErrNotFound;
	const TInt count = aCount - aFirst;
	if(count > 256)
		return KErrArgument;
	if(iStateFlags & EPaletteLocked)
		return KErrNone;
	for(TInt i = aFirst; i < count; i++) //not so busy here:-)
		{
		iLut256[i] = aPalette[i];
		}
	return KErrNone;
	}
	
	

	
void CDsa::RestartL()
    {
    //const TBool active = iDsa->IsActive();
    
    //if(!active)
    iDsa->StartL();
    
    RRegion* r = iDsa->DrawingRegion();
    iDsa->Gc()->SetClippingRegion(r);
    TRect rect = r->BoundingRect();
   
    if(rect.IsEmpty())
    	{
    	return;
    	}
    	
    iScreenRect = rect; //to ensure properly set, albeit may not(?) match to value SDL has - therefore may has to clip
	
	RecreateL();

    iStateFlags |= ERunning;
//    iScanLineWidth = iTargetBpp * HwRect().Width();
    ReleaseStop();
    if(iStateFlags & ESdlThreadSuspend)
    	{
    	EpocSdlEnv::Resume();
    	iStateFlags &= ~ ESdlThreadSuspend;
    	}
    }
    
CDsa::CDsa(RWsSession& aSession) : 
 	iSession(aSession),
  	iStateFlags(0)
	{
//	CActiveScheduler::Add(this);
	iCFTable[0] = CopyMem;
	iCFTable[1] = CopyMemFlipReversed;
	iCFTable[2] = CopyMemReversed;
	iCFTable[3] = CopyMemFlip;	
	
	iCFTable[4] = Copy256;
	iCFTable[5] = Copy256FlipReversed;
	iCFTable[6] = Copy256Reversed;
	iCFTable[7] = Copy256Flip;	
	
	
	iCFTable[8] = CopySlow;
	iCFTable[9] = CopySlowFlipReversed;
	iCFTable[10] = CopySlowReversed;
	iCFTable[11] = CopySlowFlip;	
	}
	
RWsSession& CDsa::Session()
	{
	return iSession;
	}



TUint8* CDsa::LockHwSurface()
	{
	if((iStateFlags & EUpdating) == 0) //else frame is skipped
		{
		return LockSurface();
		}
	return NULL; 
	}

/*	
void CDsa::RunL()
	{
	iStateFlags &= ~EUpdating;
	}
		
	
void CDsa::DoCancel()
	{
	iStateFlags &= ~EUpdating;
	//nothing can do, just wait?
	}
*/	
	
TInt CDsa::AllocSurface(TBool aHwSurface, const TSize& aSize, TDisplayMode aMode)
	{
	if(aHwSurface && aMode != DisplayMode())
		return KErrArgument;
	
	iSourceMode = aMode;
	
	iSourceBpp = BytesPerPixel(aMode);
	
	const TSize size = WindowSize();
	if(aSize.iWidth > size.iWidth)
		return KErrTooBig;
	if(aSize.iHeight > size.iHeight)
		return KErrTooBig;
	
	TRAPD(err, CreateSurfaceL());
	if(err != KErrNone)
		return err;


	SetCopyFunction();
	
	EpocSdlEnv::ObserverEvent(MSDLObserver::EEventWindowReserved);
	
	return KErrNone;
	}
	

/*
void SaveBmp(const TDesC& aName, const TAny* aData, TInt aLength, const TSize& aSz, TDisplayMode aMode)
	{
	CFbsBitmap* s = new CFbsBitmap();
	s->Create(aSz, aMode);
	s->LockHeap();
	TUint32* addr = s->DataAddress();
	Mem::Copy(addr, aData, aLength);
	s->UnlockHeap();
	s->Save(aName);
	s->Reset();
	delete s;
	}
	
void SaveBmp(const TDesC& aName, const TUint32* aData, const TSize& aSz)
	{
	CFbsBitmap* s = new CFbsBitmap();
	s->Create(aSz, EColor64K);
	TBitmapUtil bmp(s);
	bmp.Begin(TPoint(0, 0));
	for(TInt j = 0; j < aSz.iHeight; j++)
		{
		bmp.SetPos(TPoint(0, j));
		for(TInt i = 0; i < aSz.iWidth; i++)
			{
			bmp.SetPixel(*aData);
			aData++;
			bmp.IncXPos();
			}
		}
	bmp.End();
	s->Save(aName);
	s->Reset();
	delete s;
	}	
	
TBuf<16> FooName(TInt aFoo)
	{
	TBuf<16> b;
	b.Format(_L("C:\\pic%d.mbm"), aFoo);
	return b;
	}
*/
void CDsa::ClipCopy(TUint8* aTarget, const TUint8* aSource, const TRect& aRect, const TRect& aTargetPos) const
	{
	TUint8* target = aTarget;
	const TUint8* source = aSource;
	const TInt lineWidth = aRect.Width();
	source += iSourceBpp * (aRect.iTl.iY * lineWidth); 
	TInt sourceStartOffset = iSourceBpp *  aRect.iTl.iX;
	source += sourceStartOffset;
	target += iTargetBpp * ((aTargetPos.iTl.iY + aRect.iTl.iY ) * lineWidth); 
	TInt targetStartOffset = iTargetBpp * (aRect.iTl.iX + aTargetPos.iTl.iX);
	target += targetStartOffset;
	TUint32* targetPtr = reinterpret_cast<TUint32*>(target);
	const TInt targetWidth = HwRect().Size().iWidth;
	const TInt height = aRect.Height(); 
	
	TInt lineMove = iStateFlags & EOrientation90 ? 1 : lineWidth;
	
	if(iStateFlags & EOrientation180)
		{
		
		targetPtr += targetWidth *  (height - 1);
	
		for(TInt i = 0; i < height; i++) //source is always smaller