Example1: // to draw frames with CAlfCompositionPixelSource API class CMyClass: public CBase , public MAlfBufferProvider { private: CAlfCompositionPixelSource* iAlfCompositionPixelSource; MAlfBufferProvider::TBufferCreationAttributes iAttributes; public:

CMyClass() {}

ConstructL() { // ... iAttributes.iWidth = width; iAttributes.iHeight = height; iAttributes.iFormat = MAlfBufferProvider::ESourceFormatARGB_8888 ; iAttributes.iStride = iAttributes.iWidth * 4; iAttributes.iAlignment = 32;

iAlfCompositionPixelSource = CAlfCompositionPixelSource::NewL(*this, iMyDrawableWindow); iAlfCompositionPixelSource->iActivateL() }

TBool ProduceNewFrameL(const TRegion& aVisibleRegion, TUint8*& aBuffer) { // ... // copy pixel data to aBuffer TUint8* from = (TUint8*)bitmap->DataAddress(); TUint bytes = bitmap->SizeInPixels()*4; for (TInt y = bitmap->SizeInPixels().iHeight; y > 0; y--) { Mem::Copy(aBuffer, from, bytes); aBuffer += iAttributes.iStride; from += bitmap->DataStride(); } // ... return ETrue; // to continue getting ProduceNewFrameL callbacks };

MAlfBufferProvider::TBufferCreationAttributes & BufferAttributes() { return iAttributes };

void ContextAboutToSuspend() {}; void OnActivation() {}; // ... }

Example2: // client may want or need to adjust ProduceNewFrameL-callbacks inverval class CMyClass: public CActive , public MAlfBufferProvider { private: CAlfCompositionPixelSource* iAlfCompositionPixelSource; MAlfBufferProvider::TBufferCreationAttributes iAttributes; TBool iDrawNext; TTimeIntervalMicroSeconds32 iWaitTime; RTimer iTimer; public:

CMyClass() {}

ConstructL() { // ... iDrawNext = ETrue; iWaitTime = 25*1000; // ... }

void RunL() { if( iStatus.Int() != KErrNone ) { iDrawNext = ETrue; iAlfCompositionPixelSource-> ActivateL() ; } } // ... TBool ProduceNewFrameL(const TRegion& aVisibleRegion, TUint8*& aBuffer) { if( iDrawNext ) { iDrawNext = EFalse; } else { iTimer.After( iStatus, iWaitTime ); return EFalse; } // ... // copy pixel data to aBuffer // ... return ETrue; // to continue getting ProduceNewFrameL callbacks }; // ... }

Example3: // API can be used withou the actual window class CMyClass: public CBase , public MAlfBufferProvider { private: CAlfCompositionPixelSource* iAlfCompositionPixelSource; MAlfBufferProvider::TBufferCreationAttributes iAttributes; public:

CMyClass() {}

ConstructL() { // ... iAttributes.iWidth = width; iAttributes.iHeight = height; iAttributes.iFormat = MAlfBufferProvider::ESourceFormatARGB_8888 ; iAttributes.iStride = iAttributes.iWidth * 4; iAttributes.iAlignment = 32;

iAlfCompositionPixelSource = CAlfCompositionPixelSource::NewL(*this, NULL); iAlfCompositionPixelSource->SetExtent(TRect(0,0,600,300),0,1); iAlfCompositionPixelSource->iActivateL(); } // ... TBool ProduceNewFrameL(const TRegion& aVisibleRegion, TUint8*& aBuffer) { // ... // copy pixel data to aBuffer // ... return ETrue; // to continue getting ProduceNewFrameL callbacks }; // ...

// Notice: When activating Composition pixel source after being suspended, SetExtent needs to be called again. void ContinueAfterSuspendL() { iAlfCompositionPixelSource->SetExtent(TRect(0,0,600,300),0,1); iAlfCompositionPixelSource->iActivateL(); } }