Class CMdaImageDescToBitmapUtility

Interface status:

deprecated

7.0s - Replaced by Image Conversion library - use CImageDecoder::DataNewL()

class CMdaImageDescToBitmapUtility : public CMdaImageDataReadUtility;

Description

Implements format conversion of a descriptor-based image to a bitmap.

This class has been deprecated in 7.0s, it's functionality is now part of the Image Converter Library. For more information see CImageDecoder.

The class provides functions to create an instance of this conversion utility and to open and prepare the image data.Conversion is performed using the image conversion utility interface.

Derivation

• MMdaObjectStateChangeObserver - ...

• CBase - Base class for all classes to be instantiated on the heap.

• CActive - The core class of the active object abstraction.

• CMdaImageUtility - Defines the public interface to image conversion.

• CMdaImageDataReadUtility - Base class used in the derivation of CMdaImageDescToBitmapUtility and CMdaImageF...

• CMdaImageDescToBitmapUtility - Implements format conversion of a descriptor-based image to a bitmap.

Members

Defined in CMdaImageDescToBitmapUtility:

• NewL(MMdaImageUtilObserver &,CMdaServer *)Constructs a new instance of the descriptor-based image to bitmap conversion uti...
• OpenL(const TDesC8 &,TMdaClipFormat *,TMdaPackage *,TMdaPackage *)Opens the descriptor-based image.

Inherited from CActive:

• CActive(TInt)Constructs the active object with the specified priority.
• Cancel()Cancels the wait for completion of an outstanding request.
• Deque()Removes the active object from the active scheduler's list of active objects.
• EPriorityHighA priority higher than EPriorityUserInput.
• EPriorityIdleA low priority, useful for active objects representing background processing.
• EPriorityLowA priority higher than EPriorityIdle but lower than EPriorityStandard.
• EPriorityStandardMost active objects will have this priority.
• EPriorityUserInputA priority higher than EPriorityStandard; useful for active objects handling use...
• Extension_(TUint,TAny *&,TAny *)Extension function
• IsActive()constDetermines whether the active object has a request outstanding.
• IsAdded()constDetermines whether the active object has been added to the active scheduler's li...
• Priority()constGets the priority of the active object.
• RunError(TInt)Handles a leave occurring in the request completion event handler CActive::RunL(...
• SetActive()Indicates that the active object has issued a request and that it is now outstan...
• SetPriority(TInt)Sets the priority of the active object.
• TPriorityDefines standard priorities for active objects.
• iStatusThe request status associated with an asynchronous request.

Inherited from CBase:

• Delete(CBase *)Deletes the specified object.
• operator new(TUint)Allocates the object from the heap and then initialises its contents to binary z...
• operator new(TUint,TAny *)Initialises the object to binary zeroes.
• operator new(TUint,TLeave)Allocates the object from the heap and then initialises its contents to binary z...
• operator new(TUint,TLeave,TUint)Allocates the object from the heap and then initialises its contents to binary z...
• operator new(TUint,TUint)Allocates the object from the heap and then initialises its contents to binary z...

Inherited from CMdaImageDataReadUtility:

• CancelConvertL()Cancels the conversion operation.
• ConvertL(CFbsBitmap &,CFbsBitmap &,TInt)Begins the image conversion operation for the specified frame overloaded functio...
• ConvertL(CFbsBitmap &,TInt)Begins the image conversion operation for the specified frame overloaded functio...
• DoCancel()Implements cancellation of an outstanding request.
• DoClose()
• FrameCommentL(TInt)Returns a particular comment attached to a given frame of the image This functio...
• ImageReadUtil_Reserved2()
• ImageReadUtil_Reserved3()
• ImageReadUtil_Reserved4()
• RunL()Handles an active object's request completion event.

Inherited from CMdaImageUtility:

• Close()Closes the open file-based or descriptor-based image.
• FrameCount()constReturns the number of frames in the image, counting from the first frame in the ...
• FrameInfo(TInt,TFrameInfo &)constRetrieves information about the specified frame.
• ImageUtil_Reserved1()
• ImageUtil_Reserved2()
• ImageUtil_Reserved3()
• ImageUtil_Reserved4()
• MoscoStateChangeEvent(CBase *,TInt,TInt,TInt)

Interface status:

deprecated

Inherited from: CMdaImageDescToBitmapUtility

IMPORT_C static CMdaImageDescToBitmapUtility* NewL(MMdaImageUtilObserver &aObserver, CMdaServer *aServer=0);

Description

Constructs a new instance of the descriptor-based image to bitmap conversion utility object.

The function leaves if this object cannot be created.

Parameters

MMdaImageUtilObserver &aObserver The image utility observer interface. CMdaServer *aServer A pointer to a server object. The default is NULL which means that one is automatically constructed and owned by this conversion utility object. If not NULL, the client must construct, and be responsible for, the server object. This option may be more efficient if a number of conversion utility objects are to be created.

Return value

CMdaImageDescToBitmapUtility * A pointer to the new instance of the descriptor-based image to bitmap conversion utility

Interface status:

deprecated

Inherited from: CMdaImageDescToBitmapUtility

IMPORT_C void OpenL(const TDesC8 &aDescriptor, TMdaClipFormat *aFormat=0,TMdaPackage *aCodec=0,TMdaPackage *aExtra=0);

Description

Opens the descriptor-based image.

The function is asynchronous. When the open operation is complete, successfully or otherwise, the callback function MMdaImageUtilObserver::MiuoOpenComplete(TInt) is called.Open must complete successfully before starting any conversion operation. The function can complete with KErrUnderflow, if there is insufficient information in the descriptor. Typically, this occurs when using the descriptor as a cache. In this situation, open should be performed repeatedly until the descriptor has accumulated enough information for the operation to complete with KErrNone.

Note: The optional parameters can be used to force the Media Server to interpret the descriptor-based data as being of a specific type. This is necessary for formats such as WAP wireless bitmap where the supplied descriptor does not contain a uniquely recognisable signature.

Parameters

const TDesC8 &aDescriptor A descriptor containing the image. TMdaClipFormat *aFormat The data format. This is optional. TMdaPackage *aCodec The codec to use. This is optional. TMdaPackage *aExtra Additional information which the Media Server may need to recognise the data format. This is optional.