#include <mdaimageconverter.h>
| class CMdaImageUtility : public CActive |
| Protected Attributes | |
|---|---|
| CMdaImageUtilityPriv * | iProperties |
| Public Member Functions | |
|---|---|
| virtual | ~CMdaImageUtility() |
| pure virtual void | CancelConvertL() |
| virtual IMPORT_C void | Close() |
| pure virtual void | ConvertL(CFbsBitmap &, TInt) |
| pure virtual void | ConvertL(CFbsBitmap &, CFbsBitmap &, TInt) |
| virtual IMPORT_C TInt | FrameCount() |
| virtual IMPORT_C void | FrameInfo(TInt, TFrameInfo &) |
| virtual void | ImageUtil_Reserved1() |
| virtual void | ImageUtil_Reserved2() |
| virtual void | ImageUtil_Reserved3() |
| virtual void | ImageUtil_Reserved4() |
| Protected Member Functions | |
|---|---|
| CMdaImageUtility() | |
| virtual void | DoCancel() |
| virtual void | DoClose() |
| virtual void | MoscoStateChangeEvent(CBase *, TInt, TInt, TInt) |
| void | SelfComplete(TInt) |
| Inherited Attributes | |
|---|---|
| CActive::iStatus | |
| Inherited Enumerations | |
|---|---|
| CActive:TPriority | |
Deprecated7.0s - Replaced by Image Conversion library - no direct equivalent
Defines the public interface to image conversion.
This class has been deprecated in 7.0s, it's functionality is now part of the Image Converter Library. For more information see CImageEncoder and CImageDecoder.
Clients of the concrete conversion classes call the functions provided by this interface to perform the conversion. The implementation of these functions is provided either by the concrete conversion classes themselves or by private implementation classes.
See also: CImageEncoder CImageDecoder
| void | CancelConvertL | ( | ) | [pure virtual] |
Cancels the conversion operation.
The callback function MMdaImageUtilObserver::MiuoConvertComplete() is not called.
| IMPORT_C void | Close | ( | ) | [virtual] |
Closes the open file-based or descriptor-based image.
Any conversion operation in progress is cancelled.
| void | ConvertL | ( | CFbsBitmap & | aBitmap, |
| TInt | aFrameNumber = 0 | |||
| ) | [pure virtual] | |||
Begins the image conversion operation for the specified frame overloaded function.
The operation is asynchronous. When the conversion operation is complete, successfully or otherwise, the callback function MMdaImageUtilObserver::MiuoConvertComplete() is called.When converting from a file or descriptor to a bitmap, the operation can complete with KErrUnderflow, if there is insufficient information in the file or descriptor. Typically, this occurs when using the file or descriptor as a cache. In this situation, the conversion operation should be performed repeatedly until the file or descriptor has accumulated enough information for the operation to complete with KErrNone. As much of the image as is present is converted and written to the target bitmap at each call to this function.
| Parameter | Description |
|---|---|
| aBitmap | A reference to a bitmap. This may be a source or a target for the conversion process, depending on the concrete conversion class utility being used. |
| aFrameNumber | The frame number. This value is relative to zero. For those concrete conversion classes which perform conversion from a bitmap, this value must always be zero. For those concrete conversion classes which perform conversion to a bitmap, this value must be less than the number of frames in the image. |
| void | ConvertL | ( | CFbsBitmap & | aBitmap, |
| CFbsBitmap & | aMaskBitmap, | |||
| TInt | aFrameNumber = 0 | |||
| ) | [pure virtual] | |||
Begins the image conversion operation for the specified frame overloaded function.
The operation is asynchronous. When the conversion operation is complete, successfully or otherwise, the callback function MMdaImageUtilObserver::MiuoConvertComplete() is called.When converting from a file or descriptor to a bitmap, the operation can complete with KErrUnderflow, if there is insufficient information in the file or descriptor. Typically, this occurs when using the file or descriptor as a cache. In this situation, the conversion operation should be performed repeatedly until the file or descriptor has accumulated enough information for the operation to complete with KErrNone. As much of the image as is present is converted and written to the target bitmap at each call to this function.
See also: CMdaImageUtility::ConvertL(CFbsBitmap& aBitmap,TInt aFrameNumber = 0)
| Parameter | Description |
|---|---|
| aBitmap | A reference to a bitmap. This may be a source or a target for the conversion process, depending on the concrete conversion class utility being used. |
| aMaskBitmap | A source or target mask bitmap, if present. |
| aFrameNumber | The frame number. This value is relative to zero. For those concrete conversion classes which perform conversion from a bitmap, this value must always be zero. For those concrete conversion classes which perform conversion to a bitmap, this value must be less than the number of frames in the image. |
| IMPORT_C TInt | FrameCount | ( | ) | const [virtual] |
Returns the number of frames in the image, counting from the first frame in the image, to the next frame to be decoded.
Note: The image conversion utilities do not scan all the image data on calling OpenL(), just the header. Therefore, if, as in the case of an animated gif, there is no frame count in the header, then until all the frames in the image have been decoded, the total frame count is unknown. Initially therefore, FrameCount() returns 1, but this increments as each frame is decoded, and the utility reads the next frame's header. Once the last frame has been decoded, all frames are available for access as the information about each frame is stored.
Returns: The number of frames in the image
| IMPORT_C void | FrameInfo | ( | TInt | aFrame, |
| TFrameInfo & | aInfo | |||
| ) | const [virtual] | |||
Retrieves information about the specified frame.
This function should only be called after an existing image has been successfully opened or a new image successfully created.
| Parameter | Description |
|---|---|
| aFrame | The frame number. This value is relative to zero. The value must be less than the total number of frames in the image, otherwise the function raises a USER 0 panic |
| aInfo | A reference to the frame information. |