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CVtImageRotator Class Reference

class CVtImageRotator : public CActive

Image rotator.

videosource.lib

Inherits from

CVtImageRotator
- CActive
  - CBase

Public Member Functions
	~CVtImageRotator ()
IMPORT_C CVtImageRotator *	NewL ( MVtImageRotatorObserver &, TPriority )
IMPORT_C void	Rotate (const CVtImage &, CVtImage &, const TRotationAngle &)
IMPORT_C void	RotateL (const CVtImage &, CVtImage &, const TRotationAngle &)

Private Member Functions
	CVtImageRotator ()
	CVtImageRotator ( MVtImageRotatorObserver &, TPriority )
void	Activate ()
void	ConstructL ()
void	CreateRotatorL (const TRotationAngle &)
void	DoCancel ()
void	DoRotate ()
void	RunL ()
void	Signal ( TInt )
TInt	StaticRotate ( TAny *)

Inherited Functions
	CActive::CActive(TInt)
	CActive::Cancel()
	CActive::Deque()
	CActive::Extension_(TUint,TAny &,TAny )
	CActive::IsActive()const
	CActive::IsAdded()const
	CActive::Priority()const
	CActive::RunError(TInt)
	CActive::SetActive()
	CActive::SetPriority(TInt)
	CActive::~CActive()
	CBase::CBase()
	CBase::Delete(CBase *)
	CBase::operator new(TUint)
	CBase::operator new(TUint,TAny *)
	CBase::operator new(TUint,TLeave)
	CBase::operator new(TUint,TLeave,TUint)
	CBase::operator new(TUint,TUint)
	CBase::~CBase()

Public Member Enumerations
enum	TPanics { EBusy = 1 }
enum	TRotationAngle { ERotationNone = -1, E90DegreesClockwise , E180DegreesClockwise , E270DegreesClockwise , EMirrorHorizontalAxis , EFlipVerticalAxis }

Inherited Enumerations
	CActive:TPriority

Private Attributes
CAsyncCallBack *	iAsyncCallBack
TBool	iCancelled
CFbsBitmap *	iHeapLock
MVtImageRotatorObserver &	iObserver
CVtImageRotatorImpl *	iRotatorImpl

Inherited Attributes
	CActive::iStatus

Constructor & Destructor Documentation

CVtImageRotator()

CVtImageRotator

(

)

[private]

C++ default constructor.

CVtImageRotator(MVtImageRotatorObserver &, TPriority)

CVtImageRotator	(	MVtImageRotatorObserver &	aObserver,
		TPriority	aPriority
	)	[private]

C++ constructor.

Exceptions

In	error situation leaves with one of the system wide error codes.

Parameters

MVtImageRotatorObserver & aObserver	Reference to observer.
TPriority aPriority	Active object priority.

~CVtImageRotator()

IMPORT_C

~CVtImageRotator

(

)

C++ destructor.

Member Functions Documentation

Activate()

void

Activate

(

)

[private]

Sets iStatus to KRequestPending and calls CActive::SetActive() .

ConstructL()

void

ConstructL

(

)

[private]

Second phase constructor.

Exceptions

In	error situation leaves with one of the system wide error codes.

CreateRotatorL(const TRotationAngle &)

void

CreateRotatorL

(

const TRotationAngle &

aAngle

)

[private]

Creates new instance of rotator implementation if needed.

Exceptions

In	error situation leaves with one of the system wide error codes.

Parameters

const TRotationAngle & aAngle

Used rotation angle.

DoCancel()

void

DoCancel

(

)

[private, virtual]

This is defined in CActive . Check CActive for description.

DoRotate()

void

DoRotate

(

)

[private]

Rotate method called by the StaticScale.

NewL(MVtImageRotatorObserver &, TPriority)

IMPORT_C CVtImageRotator *	NewL	(	MVtImageRotatorObserver &	aObserver,
			TPriority	aPriority = EPriorityLow
		)	[static]

Creates new instance of CVtImageRotator .

Exceptions

In	error situation leaves with one of the system wide error codes.

Parameters

MVtImageRotatorObserver & aObserver	Reference to instance observer.
TPriority aPriority = EPriorityLow	Active object priority.

Rotate(const CVtImage &, CVtImage &, const TRotationAngle &)

IMPORT_C void	Rotate	(	const CVtImage &	aSource,
			CVtImage &	aTarget,
			const TRotationAngle &	aAngle
		)

Rotates image to given angle. Possible error during initialization is returned via MVtImageRotatorObserver .

Parameters

const CVtImage & aSource	Source image that will be rotated.
CVtImage & aTarget	Target image that will hold the rotated image.
const TRotationAngle & aAngle	Rotation angle.

RotateL(const CVtImage &, CVtImage &, const TRotationAngle &)

IMPORT_C void	RotateL	(	const CVtImage &	aSource,
			CVtImage &	aTarget,
			const TRotationAngle &	aAngle
		)

Rotates image to given angle.

Exceptions

In	error situation leaves with one of the system wide error codes.

Parameters

const CVtImage & aSource	Source image that will be rotated.
CVtImage & aTarget	Target image that will hold the rotated image.
const TRotationAngle & aAngle	Rotation angle.

RunL()

void

RunL

(

)

[private, virtual]

This is defined in CActive . Check CActive for description.

Signal(TInt)

void

Signal

(

TInt

aError

)

[private]

Signals this instance AO with given error code.

Parameters

TInt aError

Signalling error code.

StaticRotate(TAny *)

TInt

StaticRotate

(

TAny *

aPtr

)

[private, static]

Rotate method called by the CAsyncCallBack .

Parameters

TAny * aPtr

Member Enumerations Documentation

Enum TPanics

An enumeration within the CVtImageRotator namespace. It provides a set of panic codes that may happen during rotation process.

Enumerators

EBusy = 1

RotateL() is called while previous rotation process has not yet been finished.

Enum TRotationAngle

An enumeration within the CVtImageRotator namespace. It provides a set of supported rotation and mirror angles.

Enumerators

ERotationNone = -1	Uninitialized place holder. Giving this rotation angle to RotateL() will make RotateL() leave with error code KErrNotSupported.
E90DegreesClockwise	Rotates image 90 degrees in a clockwise direction.
E180DegreesClockwise	Rotates image 180 degrees in a clockwise direction. (flip & mirror)
E270DegreesClockwise	Rotates image 270 degrees in a clockwise direction.
EMirrorHorizontalAxis	Mirrors the bitmap around the horizontal axis.
EFlipVerticalAxis	Flips the image around the vertical axis.