Class CMdaImageFileToBitmapUtility

class CMdaImageFileToBitmapUtility : public CMdaImageDataReadUtility;

Description

Implements format conversion of a file 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 an existing image file. Conversion is performed using the image conversion utility interface.

Derivation

• MMdaObjectStateChangeObserver - No description.

• 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 CMdaImageFileToBitmapUtility

• CMdaImageFileToBitmapUtility - Implements format conversion of a file based image to a bitmap

Members

Defined in CMdaImageFileToBitmapUtility:
NewL(), OpenL()

Inherited from CActive:
Cancel(), Deque(), EPriorityHigh, EPriorityIdle, EPriorityLow, EPriorityStandard, EPriorityUserInput, Extension_(), IsActive(), IsAdded(), Priority(), RunError(), SetActive(), SetPriority(), TPriority, iStatus

Inherited from CBase:
Delete(), operator new()

Inherited from CMdaImageDataReadUtility:
CancelConvertL(), ConvertL(), DoCancel(), DoClose(), FrameCommentL(), ImageReadUtil_Reserved2(), ImageReadUtil_Reserved3(), ImageReadUtil_Reserved4(), RunL()

Inherited from CMdaImageUtility:
Close(), FrameCount(), FrameInfo(), ImageUtil_Reserved1(), ImageUtil_Reserved2(), ImageUtil_Reserved3(), ImageUtil_Reserved4(), MoscoStateChangeEvent()

See also:

• CImageDecoder

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

Description

Constructs a new instance of the file 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

CMdaImageFileToBitmapUtility * A pointer to the new instance of the file based image to bitmap conversion utility.

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

Description

Opens the existing file based image.

The function is asynchronous. When the operation is complete, successfully or otherwise, the callback function MMdaImageUtilObserver::MiuoOpenComplete() is called.Open must complete successfully before starting any conversion operation. The function can complete with KErrUnderflow, if there is insufficient information in the file. Typically, this occurs when using the file as a cache. In this situation, open should be performed repeatedly until the file has accumulated enough information for the operation to complete with KErrNone.NotesThe optional parameters can be used to force the Media Server to interpret the file as being of a specific type. This is necessary for formats such as WAP wireless bitmap where the supplied file does not contain a uniquely recognisable signature.

Parameters

const TDesC &aFileName The full path name of the file. TMdaClipFormat *aFormat The data format. This is optional. TMdaPackage *aCodec The codec to use. This is optional. TMdaPackage *aExtra Any additional information which the Media Server may need to recognise the data format. This is optional.