Constructor for this class.

Destructor for this class.

Stops decoding if it is in progress and frees all resources owned by the object prior to its destruction.

Adds new image data.

A copy of the data is held internally, and the caller does not need to retain the data.

Requests an asynchronous decode to terminate.

Cancels any conversions currently in progress.

Continues decoding a frame and/or mask after new image data was added to the source file or descriptor and a previous call to Convert() or ContinueConvert() returned KErrUnderflow.

Call this function to retry to create a decoder after OpenL() returned with KErrUnderFlow and extra data was added to the descriptor using AppendDataL(). This function can be recalled until ValidDecoder() return ETrue.

Continues processing image headers after new image data was appended.

This function can be called until IsImageHeaderProcessingComplete() return ETrue.

Starts decoding an image frame asynchronously.

When converting the operation can complete with KErrUnderflow, if there is insufficient information in the descriptor. In this situation, ContinueConvert() should be called repeatedly until the descriptor has accumulated enough information for ContinueConvert() to complete with KErrNone.

Starts decoding an image frame and mask asynchronously.

When converting the operation can complete with KErrUnderflow, if there is insufficient information in the descriptor. In this situation, ContinueConvert() should be called repeatedly until the descriptor has accumulated enough information for ContinueConvert() to complete with KErrNone.

Returns a particular comment attached to a given frame of the image. Ownership of the returned buffer is transferred to the caller.

Returns the number of frames in the image being decoded. This function can be called immediately after the call to create the decoder, thus enabling the caller to know how many frames need to be converted.

Returns the image data for a specific frame.

Use FrameCount() to determine how many frames are contained in the image before using this function.

Returns the frame info for a specified frame of the image.

This function can be called immediately after the call to create the decoder, thus enabling the caller to know about each frame in advance of converting it.

Returns the formatted frame information strings for a specific frame.

Ownership is transferred to the caller.

Returns the formatted frame information strings for a specific frame and leave it on the cleanup stack.

Ownership is transferred to the caller.

Returns a particular comment attached to the image. Ownership of the returned buffer is transferred to the caller.

Use NumberOfImageComments() to determine how many (if any) comments are contained within the image.

Returns the implementation UID of the decoder being used to decode the image.

Returns the status of the image.

If the image is incomplete or not terminated correctly EFalse will be returned

Creates a buffered decoder.

The function leaves if the decoder object cannot be created or initialised.

Returns the number of comments attached to a given frame of the image as opposed to the whole image.

Use FrameCount() to retrieve the number of frames in the image to ensure that the value you use for aFrameNumber is valid.

Returns the number of comments attached to the image (as opposed to a particular frame).

Creates a decoder for the image in the source buffer. The client supplies a MIME type which will be used to try and select an appropriate plugin decoder. If it finds a decoder it creates it and then goes on to use that decoder to scan the beginning of the image file.

Creates a decoder for the image in the source buffer.

If the client supplies an image type (and sub-type, if applicable) or decoder uid, these will be used to try and select an appropriate plugin decoder. If not, then the selection will be done by matching the image header from the buffer. If it finds a decoder it creates it and then goes on to use that decoder to scan the beginning of the image buffer. If a decoder could not be created append data using AppendDataL() and call ContinueOpenL().

Reset the decoder for reuse.

Follow this call with OpenL() and new source data.

Determine if enough data was available to determine which plugin decoder to use. If this return EFalse append extra data using AppendDataL() and and call ContinueOpenL()