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ImageProcessor::CImgProcessor Class Reference

class ImageProcessor::CImgProcessor : public CBase

This class provides functions to process images. Those operations can be divided in two groups:

effects.
geometrical operations.

Good examples of effects could be the Sepia effect applying shades of brown to an image, or the solarize effect that consists in reversing the tones of a picture and make it look like a negative. Good examples of geometrical operations could be Rotation or Flip.

The image processor will decode and render an image:

Inputs can be

compressed images (JPEG, GIF, PNG etc)
uncompressed images ( CFbsBitmap and general pixel buffers e.g. YUV 4:2:0 Interleaved etc)

Outputs can be

compressed images (JPEG, GIF, PNG etc)
uncompressed images ( CFbsBitmap and general pixel buffers e.g. YUV 4:2:0 Interleaved etc)

An intermediate generally low resolution uncompressed image providing a preview representation of the output of the processing is provided allowing applications to display the results of the operations applied without needing to fully render the image. Multiple previews are allowed.

Images may be overlaid onto the main source image.

The source image can be changed and the current effects and geometric oprations will be re-applied to the new image. The previews will be updated.

Inherits from

ImageProcessor::CImgProcessor
- CBase

Public Member Functions
	~CImgProcessor ()
IMPORT_C void	ApplyOperationL ( CImgProcessor::TOperation )
IMPORT_C TRgb	BackgroundColorL ()
IMPORT_C TInt	CalculatePixelBufferSizeL ( TSize , TDisplayMode , TUint32 )
IMPORT_C TInt	CalculatePixelBufferSizeL ( TSize , const TUid &, TUint32 )
IMPORT_C TBool	CanRedoL ()
IMPORT_C TBool	CanUndoL ()
IMPORT_C void	Cancel ()
IMPORT_C void	ConvertFileExtensionToUidL (const TDesC &, TUid &, TUid &)
IMPORT_C void	ConvertMimeTypeToUidL (const TDesC8 &, TUid &, TUid &)
IMPORT_C void	ConvertUidToFileExtensionL ( TDes &, const TUid &, const TUid &)
IMPORT_C void	ConvertUidToMimeTypeL ( TDes8 &, const TUid &, const TUid &)
IMPORT_C void	CreateInputL ( CFbsBitmap &)
IMPORT_C void	CreateInputL ( CImageFrame &)
IMPORT_C void	CreateInputL (const TSize &, const TRgb &)
IMPORT_C TSize	CurrentSizeL ()
IMPORT_C TEffect *	EffectL ( TUid )
IMPORT_C TAny *	Extension ( TUid )
IMPORT_C void	InitializeL ()
IMPORT_C void	InitializeL ( TUint64 )
IMPORT_C TInputInfo *	InputInfoL ()
IMPORT_C void	InputUpdatedL ()
IMPORT_C CImgProcessor *	NewL ( RFs &, MImgProcessorObserver &, TUid )
IMPORT_C TUint64	Options ()
IMPORT_C TOutputInfo *	OutputInfoL ()
IMPORT_C TOverlay *	OverlayL ()
IMPORT_C TPreview *	PreviewL ( TInt )
IMPORT_C void	ProcessL ()
IMPORT_C void	ProcessL (const TSize &, TBool )
IMPORT_C TProgressInfo *	ProgressInfoL ()
IMPORT_C void	RedoAllL ()
IMPORT_C void	RedoL ()
IMPORT_C void	ResetL ()
IMPORT_C void	SetBackgroundColorL (const TRgb &)
IMPORT_C void	SetInputL (const TDesC &, const TUid &, const TUid &)
IMPORT_C void	SetInputL ( RFile &, const TUid &, const TUid &)
IMPORT_C void	SetInputL ( TMMSource &, const TUid &, const TUid &)
IMPORT_C void	SetInputL (const TDesC8 &, const TUid &, const TUid &)
IMPORT_C void	SetInputL (const CFbsBitmap &, const CFbsBitmap *)
IMPORT_C void	SetInputL (const CImageFrame &)
IMPORT_C void	SetInputL (CImagePanorama &)
IMPORT_C void	SetInputRectL (const TRect &)
IMPORT_C void	SetOptionsL ( TUint64 )
IMPORT_C void	SetOutputL (const TDesC &, const TUid &, const TUid &)
IMPORT_C void	SetOutputL ( RFile &, const TUid &, const TUid &)
IMPORT_C void	SetOutputL ( RBuf8 &, const TUid &, const TUid &)
IMPORT_C void	SetOutputL ( CImageFrame &)
IMPORT_C void	SetOutputL ( CFbsBitmap &, CFbsBitmap *)
IMPORT_C TState	State ()
IMPORT_C void	SupportedEffectsL ( RArray < TUid > &)
IMPORT_C void	SupportedInputDisplayModesL ( RArray < TDisplayMode > &)
IMPORT_C void	SupportedInputFormatsL ( RArray < TUid > &)
IMPORT_C void	SupportedInputImageFrameFormatsL ( RArray < TUid > &)
IMPORT_C void	SupportedInputSubFormatsL ( TUid , RArray < TUid > &)
IMPORT_C TUint	SupportedOperations ()
IMPORT_C TUint64	SupportedOptions ()
IMPORT_C void	SupportedOutputDisplayModesL ( RArray < TDisplayMode > &)
IMPORT_C void	SupportedOutputFormatsL ( RArray < TUid > &)
IMPORT_C void	SupportedOutputImageFrameFormatsL ( RArray < TUid > &)
IMPORT_C void	SupportedOutputSubFormatsL ( TUid , RArray < TUid > &)
IMPORT_C void	UndoAllL ()
IMPORT_C void	UndoL ()

Private Member Functions
	CImgProcessor ()
void	ConstructL ( RFs &, MImgProcessorObserver &, TUid )

Inherited Functions
	CBase::CBase()
	CBase::Delete(CBase *)
	CBase::Extension_(TUint,TAny &,TAny )
	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	TEvent { EEventInitializing = 0, EEventInitializingComplete , EEventProcessing , EEventProcessingComplete , EEventRendering , EEventRenderingComplete , EEventPreviewInitializing , EEventPreviewInitializingComplete , EEventPreviewRendering , EEventPreviewRenderingComplete }
enum	TOperation { EOperationNone = 0x0, EOperationRotate90 = 0x1, EOperationRotate180 = 0x2, EOperationRotate270 = 0x4, EOperationMirrorHorizontalAxis = 0x8, EOperationMirrorHorizontalAxisRotate90 = 0x10, EOperationMirrorVerticalAxis = 0x20, EOperationMirrorVerticalAxisRotate90 = 0x40 }
enum	TOptions { EOptionNone = 0x00, EOptionSyncProcessing = 0x01, EOptionExifMetadataProcessing = 0x02 }
enum	TState { EUninitialized = 0, EInitializing , EInitialized , EEffectActive , EProcessing , EPreviewInitializing , EPreviewRendering , EStatesCount }

Private Attributes
CImageProcessorImpl *	iImplementation

Constructor & Destructor Documentation

CImgProcessor()

CImgProcessor

(

)

[private]

~CImgProcessor()

IMPORT_C

~CImgProcessor

(

)

Member Functions Documentation

ApplyOperationL(CImgProcessor::TOperation)

IMPORT_C void

ApplyOperationL

(

CImgProcessor::TOperation

aOperation

)

Applies a geometrical operation to the image. The image processor needs to be in an initialized state.

Parameters

CImgProcessor::TOperation aOperation

The geometrical operation to be applied.

BackgroundColorL()

IMPORT_C TRgb

BackgroundColorL

(

)

const

Retrieves the current background color.

leave: KErrNotReady The input of the image processor is not set.

leave: Other A range of system wide error codes.

CalculatePixelBufferSizeL(TSize, TDisplayMode, TUint32)

IMPORT_C TInt	CalculatePixelBufferSizeL	(	TSize	aSizeInPixels,
			TDisplayMode	aDisplayMode,
			TUint32	aScanLineLength = 0
		)	const

Calculates the required pixel buffer size in bytes for the destination image given display mode and scan line length.

leave: KErrNotReady The image processor is not in EUninitialized state.

leave: Other A range of system wide error codes.

Parameters

TSize aSizeInPixels	The size in pixels of the image to calculate buffer size for.
TDisplayMode aDisplayMode	The display mode of the destination image to calculate buffer size for. section for details.
TUint32 aScanLineLength = 0	Number of bytes per image row.

CalculatePixelBufferSizeL(TSize, const TUid &, TUint32)

IMPORT_C TInt	CalculatePixelBufferSizeL	(	TSize	aSizeInPixels,
			const TUid &	aFormat,
			TUint32	aScanLineLength = 0
		)	const

Calculates the required pixel buffer size in bytes for the destination image given destination uncompressed image format and scan line length.

leave: KErrNotReady The image processor is not in EUninitialized state.

leave: Other A range of system wide error codes.

Parameters

TSize aSizeInPixels	The size in pixels of the raw image to calculate buffer size for.
const TUid & aFormat	The format of the raw image to calculate buffer size for (one of the valid CImageFrame formats). section for details.
TUint32 aScanLineLength = 0	Number of bytes per image row.

CanRedoL()

IMPORT_C TBool

CanRedoL

(

)

const

Determines if there are operations on the operation stack which can be re-applied.

leave: KErrNotReady The image processor is not initialized or input is not set.

CanUndoL()

IMPORT_C TBool

CanUndoL

(

)

const

Determines if there are operations on the operation stack which can be 'undone'.

leave: KErrNotReady The image processor is not initialized or input is not set.

leave: Other A range of system wide error codes.

Cancel()

IMPORT_C void

Cancel

(

)

Cancels any current asynchronous operation, for example preview or output rendering. Ignored if no asynchronous operation is in progress.

ConstructL(RFs &, MImgProcessorObserver &, TUid)

void	ConstructL	(	RFs &	aFileServerSession,
			MImgProcessorObserver &	aObserver,
			TUid	aPluginUid
		)	[private]

Parameters

RFs & aFileServerSession
MImgProcessorObserver & aObserver
TUid aPluginUid

ConvertFileExtensionToUidL(const TDesC &, TUid &, TUid &)

IMPORT_C void	ConvertFileExtensionToUidL	(	const TDesC &	aFileExtension,
			TUid &	aFormat,
			TUid &	aSubFormat
		)	const

Converts a given file extension to format and sub-format UIDs.

leave: KErrNotFound The given file extension is not found in existing formats.

leave: Other A range of system wide error codes.

Parameters

const TDesC & aFileExtension	The file extension to convert.
TUid & aFormat	The format UID corresponding to the given file extension.
TUid & aSubFormat	The sub-format UID corresponding to the given file extension.

ConvertMimeTypeToUidL(const TDesC8 &, TUid &, TUid &)

IMPORT_C void	ConvertMimeTypeToUidL	(	const TDesC8 &	aMimeType,
			TUid &	aFormat,
			TUid &	aSubFormat
		)	const

Converts a given mime type to format and sub-format UIDs.

leave: KErrNotFound The given mime type is not found in existing formats.

leave: Other A range of system wide error codes.

Parameters

const TDesC8 & aMimeType	The mime type to convert.
TUid & aFormat	The format UID corresponding to the given mime type.
TUid & aSubFormat	The sub-format UID corresponding to the given mime type.

ConvertUidToFileExtensionL(TDes &, const TUid &, const TUid &)

IMPORT_C void	ConvertUidToFileExtensionL	(	TDes &	aFileExtension,
			const TUid &	aFormat,
			const TUid &	aSubFormat
		)	const

Converts a format and sub-format UIDs to a file extension.

leave: KErrNotFound The given format UID is not found in existing file extensions.

leave: Other A range of system wide error codes.

Parameters

TDes & aFileExtension	The file extension corresponding to the given format and sub-format UIDs. (Consider re-ordering these parameters)
const TUid & aFormat	The format UID to convert.
const TUid & aSubFormat	The sub-format UID to convert.

ConvertUidToMimeTypeL(TDes8 &, const TUid &, const TUid &)

IMPORT_C void	ConvertUidToMimeTypeL	(	TDes8 &	aMimeType,
			const TUid &	aFormat,
			const TUid &	aSubFormat
		)	const

Converts a format and sub-format UID to a mime type.

leave: KErrNotFound The given format UID is not found in existing mime types.

leave: Other A range of system wide error codes.

Parameters

TDes8 & aMimeType	Returns the mime type corresponding to the given format and sub-format UIDs. (Consider re-ordering these parameters)
const TUid & aFormat	The format UID to convert.
const TUid & aSubFormat	The sub-format UID to convert.

CreateInputL(CFbsBitmap &)

IMPORT_C void

CreateInputL

(

CFbsBitmap &

aBitmap

)

Creates internal pixel buffer for the input and copies data from source bitmap to internal buffer

leave: KErrNotReady The image processor is not initialized.

leave: KErrArgument The input bitmap size is 0.

leave: Other A range of system wide error codes.

Parameters

CFbsBitmap & aBitmap

The bitmap to copy.

CreateInputL(CImageFrame &)

IMPORT_C void

CreateInputL

(

CImageFrame &

aPixelBuffer

)

Creates internal pixel buffer the for the source image and copies data from the image frame to the internal buffer

leave: KErrNotReady The image processor is not initialized.

leave: KErrArgument The input bitmap size is 0.

leave: Other A range of system wide error codes.

Parameters

CImageFrame & aPixelBuffer

The image frame to copy.

CreateInputL(const TSize &, const TRgb &)

IMPORT_C void	CreateInputL	(	const TSize &	aSize,
			const TRgb &	aColor
		)

Creates internal pixel buffer for the source image using the given size and initializes source image with the given color.

leave: KErrNotReady The image processor is not initialized.

leave: KErrArgument The input bitmap size is 0.

leave: Other A range of system wide error codes.

Parameters

const TSize & aSize	The size of the new source image.
const TRgb & aColor	The color of the new source image.

CurrentSizeL()

IMPORT_C TSize

CurrentSizeL

(

)

const

Retrieves the size of the current source image.

leave: KErrNotReady The input image source data hasn't been set.

leave: Other A range of system wide error codes.

EffectL(TUid)

IMPORT_C TEffect *

EffectL

(

TUid

aEffect

)

Retrieves the interface to an specific effect (e.g. Sepia effect) given an effect UID.

leave: KErrNotReady The image processor is not initialized or is initializing.

leave: KErrNotSupported The given effect is not supported.

leave: KErrNoMemory Not enough memory.

leave: Other A range of system wide error codes.

Parameters

TUid aEffect

Extension(TUid)

IMPORT_C TAny *

Extension

(

TUid

aExtension

)

Retrieves a non-standard extension on the image processor.

Parameters

TUid aExtension

The UID of the extension to be retrieved

InitializeL()

IMPORT_C void

InitializeL

(

)

Initializes the image processor asynchronously. After this asynchronous call completes,the image processor's state should normally be EInitialized.

leave: KErrNotReady The image processor has already been initialized.

leave: Other A range of system wide error codes.

InitializeL(TUint64)

IMPORT_C void

InitializeL

(

TUint64

aOptions

)

Initializes the image processor. After the initialization completes, the image processor's state should normally be EInitialized.

leave: KErrNotReady The image processor has already been initialized.

leave: KErrNotSupported The option to set to the image processor is not supported.

leave: Other A range of system wide error codes.

Parameters

TUint64 aOptions

The options to set to this image processor with the initialization.

InputInfoL()

IMPORT_C TInputInfo *

InputInfoL

(

)

Retrieves information about the current source image.

leave: KErrNotReady The image processor is not initialized or is initializing.

leave: KErrNoMemory Not enough memory.

leave: Other A range of system wide error codes.

InputUpdatedL()

IMPORT_C void

InputUpdatedL

(

)

This method needs to be called when the input image source data has been updated externally.

leave: KErrNotReady The image processor is not initialized or input image source data hasn't been set.

leave: Other A range of system wide error codes.

NewL(RFs &, MImgProcessorObserver &, TUid)

IMPORT_C CImgProcessor *	NewL	(	RFs &	aFileServerSession,
			MImgProcessorObserver &	aObserver,
			TUid	aImageProcessorPluginUid = KNullUid
		)	[static]

Constructs a new image processor object.

leave: KErrNoMemory There is insufficient memory available.

Parameters

RFs & aFileServerSession	A file server session for the image processor to use.
MImgProcessorObserver & aObserver	The image processor observer to recieve callbacks.
TUid aImageProcessorPluginUid = KNullUid	The UID of the image processor plugin to load. Can be set to KUidNull which will load the highest version of the plugin.

Options()

IMPORT_C TUint64

Options

(

)

const

Gets the set of the options set in the image processor.

CImgProcessor : TOperation

OutputInfoL()

IMPORT_C TOutputInfo *

OutputInfoL

(

)

Retrieves information about the output image.

leave: KErrNotReady The image processor is not initialized or is initializing.

leave: KErrNoMemory Not enough memory.

leave: Other A range of system wide error codes.

OverlayL()

IMPORT_C TOverlay *

OverlayL

(

)

Retrieves this image processor's TOverlay object. TOverlay provides functions to overlay a border or clipart onto an image.

leave: KErrNotReady The image processor is not initialized or is initializing.

leave: KErrNoMemory Not enough memory.

leave: Other A range of system wide error codes.

PreviewL(TInt)

IMPORT_C TPreview *

PreviewL

(

TInt

aPreviewId

)

Displays a low resolution preview of the output image with the effects and/or operations applied before rendering to a high resolution output image. Multiple previews are possible.

If the requested preview already exists, it will be returned, otherwise a new preview with id aPreviewId will be created and returned.

leave: KErrNotReady The image processor is not initialized or is initializing.

leave: KErrNoMemory Not enough memory.

leave: Other A range of system wide error codes.

Parameters

TInt aPreviewId

The unique id for preview image. It is not the index of the preview of Image Processor. Instead any value can be given here to either return an preview previously created or will create a new one with that id.

ProcessL()

IMPORT_C void

ProcessL

(

)

All operations and effects are performed on the source image which is then rendered to the output specified. The size for the output image being rendered is the same as the size for the input image. Aspect ratio is maintained.

The image processor behaves differently according to if ImageProcessor::EOptionSyncProcessing is set or not ImageProcessor::CImgProcessor::SetOptionsL . In the asynchronous case the call leaves with KErrNorReady immediately if the image processor is not initialised. If an error occurs during asynchronous processing then the error is reported back to the client via the observer ImageProcessor::MImgProcessorObserver .In the synchronous case i.e. when ImageProcessor::EOptionSyncProcessing is set then the same errors are reported except this time by leaving with the error code directly from ProcessL. In this case no callback is made to the observer.

leave: KErrNotReady The image processor is not initialized or input is not set or output is not set.

leave: Other A range of system wide error codes.

ProcessL(const TSize &, TBool)

IMPORT_C void	ProcessL	(	const TSize &	aSize,
			TBool	aMaintainAspectRatio
		)

All operations and effects are performed on the source image which is then rendered to the output specified. The aspect ratio can be controlled.

leave: KErrNotReady The image processor is not initialized or input is not set or output is not set.

leave: Other A range of system wide error codes.

Parameters

const TSize & aSize	The proposed size for the output image being rendered. If a size of 0, 0 is passed then the rendered output size is the same as the input size.
TBool aMaintainAspectRatio	ETrue to maintain the aspect ratio, EFalse otherwise. Must be ETrue if aSize is passed as 0,0

ProgressInfoL()

IMPORT_C TProgressInfo *

ProgressInfoL

(

)

The progress infomation of the rendering function which is executed iteratively to enable asynchronous operation. This gives the possibility to show a progress bar in the GUI when performing time consuming renderings. Rendering functions are synchronous if EOptionSyncProcessing option is set on CImgProcessor .

Retrieves the available progress information in a TProgressInfo obect.

leave: KErrNotReady The image processor is not initialized or is initializing.

leave: KErrNoMemory Not enough memory.

leave: Other A range of system wide error codes.

RedoAllL()

IMPORT_C void

RedoAllL

(

)

Re-applies all re-doable operations previously undone.

leave: KErrNotReady The image processor is not initialized or input is not set.

leave: Other A range of system wide error codes.

RedoL()

IMPORT_C void

RedoL

(

)

Re-applies the most recent redoable operation.

leave: KErrNotReady The image processor is not initialized or input is not set.

leave: Other A range of system wide error codes.

ResetL()

IMPORT_C void

ResetL

(

)

Resets the image processor. image processor's input is reset and image processor's state is set to EInitialized.

leave: KErrNotReady The image processor is not initialized or is initializing.

leave: Other A range of system wide error codes.

SetBackgroundColorL(const TRgb &)

IMPORT_C void

SetBackgroundColorL

(

const TRgb &

aColor

)

Sets the background color to use for the output image. Any area of the output image which is not rendered to is set to this colour.

leave: KErrNotReady The image processor is not initialized or input is not set.

leave: Other A range of system wide error codes.

Parameters

const TRgb & aColor

The background color to set.

SetInputL(const TDesC &, const TUid &, const TUid &)

IMPORT_C void	SetInputL	(	const TDesC &	aFilename,
			const TUid &	aFormat = KNullUid,
			const TUid &	aSubFormat = KNullUid
		)

Sets or updates the source image to the specified file name.

leave: KErrNotReady The image processor is not initialized.

leave: Other A range of system wide error codes.

Parameters

const TDesC & aFilename	The filename of the new source image to use.
const TUid & aFormat = KNullUid	The format of the new source image to use. If KNullUid is passed then an attempt is made to recognize its format.
const TUid & aSubFormat = KNullUid	The sub-format of the new source image to use. If KNullUid is passed then an attempt is made to recognize its sub-format.

SetInputL(RFile &, const TUid &, const TUid &)

IMPORT_C void	SetInputL	(	RFile &	aFile,
			const TUid &	aFormat = KNullUid,
			const TUid &	aSubFormat = KNullUid
		)

The source image is set or updated to the given file.

leave: KErrNotReady The image processor is not initialized.

leave: Other A range of system wide error codes.

Parameters

RFile & aFile	The file handle of the new source image to use.
const TUid & aFormat = KNullUid	The format of the new source image to use.
const TUid & aSubFormat = KNullUid	The sub-format of the new source image to use.

SetInputL(TMMSource &, const TUid &, const TUid &)

IMPORT_C void	SetInputL	(	TMMSource &	aDrmFile,
			const TUid &	aFormat = KNullUid,
			const TUid &	aSubFormat = KNullUid
		)

The source image is set or updated. The source image may be DRM protected.

leave: KErrNotReady The image processor is not initialized.

leave: Other A range of system wide error codes.

Parameters

TMMSource & aDrmFile	The DRM file of the new source image to use.
const TUid & aFormat = KNullUid	The format of the new source image to use.
const TUid & aSubFormat = KNullUid	The sub-format of the new source image to use.

SetInputL(const TDesC8 &, const TUid &, const TUid &)

IMPORT_C void	SetInputL	(	const TDesC8 &	aBuffer,
			const TUid &	aFormat = KNullUid,
			const TUid &	aSubFormat = KNullUid
		)

The source image is set or updated to the content of the buffer provided.

leave: KErrNotReady The image processor is not initialized.

leave: Other A range of system wide error codes.

Parameters

const TDesC8 & aBuffer	The buffer containing the new source image to use.
const TUid & aFormat = KNullUid	The format of the new source image to use.
const TUid & aSubFormat = KNullUid	The sub-format of the new source image to use.

SetInputL(const CFbsBitmap &, const CFbsBitmap *)

IMPORT_C void	SetInputL	(	const CFbsBitmap &	aBitmap,
			const CFbsBitmap *	aMask = NULL
		)

The source image is set or updated to the bitmap provided.

leave: KErrNotReady The image processor is not initialized.

leave: Other A range of system wide error codes.

Parameters

const CFbsBitmap & aBitmap	The bitmap of the new source image to use.
const CFbsBitmap * aMask = NULL	The bitmap mask of the new source image to use.

SetInputL(const CImageFrame &)

IMPORT_C void

SetInputL

(

const CImageFrame &

aPixelBuffer

)

The source image is set or updated to the image frame provided.

leave: KErrNotReady The image processor is not initialized.

leave: Other A range of system wide error codes.

Parameters

const CImageFrame & aPixelBuffer

The image frame of the new source image to use.

SetInputL(CImagePanorama &)

IMPORT_C void

SetInputL

(

CImagePanorama &

aPanorama

)

The input is set or updated to the panorama object provided. Any existing options are reset.

leave: KErrNotReady The image processor is not initialized.

leave: Other A range of system wide error codes.

Parameters

CImagePanorama & aPanorama

The panorama object to use.

SetInputRectL(const TRect &)

IMPORT_C void

SetInputRectL

(

const TRect &

aRect

)

Sets the area of interest of the source image to be used for processing.

leave: KErrNotReady The image processor is not initialized or input image source data hasn't been set.

leave: KErrArgument The area size is 0 or there is no overlap between aRect and source image.

leave: Other A range of system wide error codes.

Parameters

const TRect & aRect

A reference to a TRect that specifies the location and size of the region to be used for the source image.

SetOptionsL(TUint64)

IMPORT_C void

SetOptionsL

(

TUint64

aOptions

)

Sets the desired options. Options can be combined using bitwise inclusive OR.

CImgProcessor : TOptions

Parameters

TUint64 aOptions

The new options to set to this image processor.

SetOutputL(const TDesC &, const TUid &, const TUid &)

IMPORT_C void	SetOutputL	(	const TDesC &	aFilename,
			const TUid &	aFormat = KImageTypeJPGUid ,
			const TUid &	aSubFormat = KNullUid
		)

Changes the output image to the image specified in the file given. Rendering is not performed.

leave: KErrNotReady The image processor is not initialized.

leave: Other A range of system wide error codes.

Parameters

const TDesC & aFilename	The filename of the new output image to use.
const TUid & aFormat = KImageTypeJPGUid	The format of the new output image to use.
const TUid & aSubFormat = KNullUid	The sub-format of the new output image to use.

SetOutputL(RFile &, const TUid &, const TUid &)

IMPORT_C void	SetOutputL	(	RFile &	aFile,
			const TUid &	aFormat = KImageTypeJPGUid ,
			const TUid &	aSubFormat = KNullUid
		)

Changes the output image to the image specified in the file given. Rendering is not performed.

leave: KErrNotReady The image processor is not initialized.

leave: Other A range of system wide error codes.

Parameters

RFile & aFile	The file handle of the new output image to use.
const TUid & aFormat = KImageTypeJPGUid	The format of the new output image to use.
const TUid & aSubFormat = KNullUid	The sub-format of the new output image to use.

SetOutputL(RBuf8 &, const TUid &, const TUid &)

IMPORT_C void	SetOutputL	(	RBuf8 &	aBuffer,
			const TUid &	aFormat = KImageTypeJPGUid ,
			const TUid &	aSubFormat = KNullUid
		)

Changes the output image to the image specified in the buffer given. Rendering is not performed.

leave: KErrNotReady The image processor is not initialized.

leave: Other A range of system wide error codes.

Parameters

RBuf8 & aBuffer	The buffer containing the new output image to use. This may be re-allocated when rendering is performed if more memory is required.
const TUid & aFormat = KImageTypeJPGUid	The format of the new output image to use.
const TUid & aSubFormat = KNullUid	The sub-format of the new output image to use.

SetOutputL(CImageFrame &)

IMPORT_C void

SetOutputL

(

CImageFrame &

aPixelBuffer

)

Changes the output image to the image specified in the buffer given. Rendering is not performed.

leave: KErrNotReady The image processor is not initialized.

leave: KErrArgument The buffer is empty.

leave: Other A range of system wide error codes.

Parameters

CImageFrame & aPixelBuffer

The image frame of the new output image to use.

SetOutputL(CFbsBitmap &, CFbsBitmap *)

IMPORT_C void	SetOutputL	(	CFbsBitmap &	aBitmap,
			CFbsBitmap *	aMask = NULL
		)

Changes the output image to the image specified in the bitmap given. Rendering is not performed.

leave: KErrNotReady The image processor is not initialized.

leave: KErrArgument The bitmap is empty or given mask is empty.

leave: Other A range of system wide error codes.

Parameters

CFbsBitmap & aBitmap	The bitmap of the new output image to use.
CFbsBitmap * aMask = NULL	The bitmap mask of the new output image to use.

State()

IMPORT_C TState

State

(

)

const

Returns the state of the image processor.

CImgProcessor::TState

SupportedEffectsL(RArray< TUid > &)

IMPORT_C void

SupportedEffectsL

(

RArray < TUid > &

aEffects

)

const

Returns a list of effect UIDs which can be applied by this image processor.

Parameters

RArray < TUid > & aEffects

Array to be filled by the list of the supported effects.

SupportedInputDisplayModesL(RArray< TDisplayMode > &)

IMPORT_C void

SupportedInputDisplayModesL

(

RArray < TDisplayMode > &

aDisplayModes

)

const

Returns a list of supported input display modes (e.g. EColor16M).

Parameters

RArray < TDisplayMode > & aDisplayModes

Array to be filled in by the list of the supported input display modes.

SupportedInputFormatsL(RArray< TUid > &)

IMPORT_C void

SupportedInputFormatsL

(

RArray < TUid > &

aFormats

)

const

Returns a list of compressed image formats which are supported (e.g. KImageTypeJPGUid etc).

Parameters

RArray < TUid > & aFormats

Array to be filled by the list of the supported input formats.

SupportedInputImageFrameFormatsL(RArray< TUid > &)

IMPORT_C void

SupportedInputImageFrameFormatsL

(

RArray < TUid > &

aFormats

)

const

Returns a list of supported image frame formats (e.g. KUidFormat32BitRGB888Interleaved).

Parameters

RArray < TUid > & aFormats

Array to be filled in by the list of the supported input formats.

SupportedInputSubFormatsL(TUid, RArray< TUid > &)

IMPORT_C void	SupportedInputSubFormatsL	(	TUid	aFormat,
			RArray < TUid > &	aSubFormats
		)	const

Returns a list of the input sub-formats supported.

Parameters

TUid aFormat	Supported input format.
RArray < TUid > & aSubFormats	Array to be filled by the list of the supported input sub-formats.

SupportedOperations()

IMPORT_C TUint

SupportedOperations

(

)

const

Gets the set of operations supported.

CImgProcessor : TOperation

SupportedOptions()

IMPORT_C TUint64

SupportedOptions

(

)

const

Returns the options supported by this image processor as a set of flags.

CImgProcessor : TOptions

SupportedOutputDisplayModesL(RArray< TDisplayMode > &)

IMPORT_C void

SupportedOutputDisplayModesL

(

RArray < TDisplayMode > &

aDisplayModes

)

const

Returns a list of supported output display modes (e.g. EColor16M).

Parameters

RArray < TDisplayMode > & aDisplayModes

Array to be filled in by the list of the supported output display modes.

SupportedOutputFormatsL(RArray< TUid > &)

IMPORT_C void

SupportedOutputFormatsL

(

RArray < TUid > &

aFormats

)

const

Returns a list of supported compressed output image formats (e.g. KImageTypeJPGUid etc.).

Parameters

RArray < TUid > & aFormats

Array to be filled in by the list of the supported output formats.

SupportedOutputImageFrameFormatsL(RArray< TUid > &)

IMPORT_C void

SupportedOutputImageFrameFormatsL

(

RArray < TUid > &

aFormats

)

const

Returns a list of image frame formats to which the output can be rendered (e.g. KUidFormat32BitRGB888Interleaved).

Parameters

RArray < TUid > & aFormats

Array to be filled in by the list of the supported output frame formats.

SupportedOutputSubFormatsL(TUid, RArray< TUid > &)

IMPORT_C void	SupportedOutputSubFormatsL	(	TUid	aFormat,
			RArray < TUid > &	aSubFormats
		)	const

Returns a list of the output sub-formats supported.

Parameters

TUid aFormat	The supported format of ImageProcessor.
RArray < TUid > & aSubFormats	Array to be filled in by the list of the supported sub formats of ImageProcessor.

UndoAllL()

IMPORT_C void

UndoAllL

(

)

Reverts all operations which can be undone.

leave: KErrNotReady The image processor is not initialized or input is not set.

leave: Other A range of system wide error codes.

UndoL()

IMPORT_C void

UndoL

(

)

Reverts the most recent operation which can be undone.

leave: KErrNotReady The image processor is not initialized or input is not set.

leave: Other A range of system wide error codes.

Member Enumerations Documentation

Enum TEvent

Events occurring during processing.

Enumerators

EEventInitializing = 0	The image processor is initializing.
EEventInitializingComplete	The image processor has finished initializing.
EEventProcessing	Processing is in progress.
EEventProcessingComplete	Processing is complete.
EEventRendering	Rendering is in progress.
EEventRenderingComplete	Event rendering is complete.
EEventPreviewInitializing	The preview is initializing.
EEventPreviewInitializingComplete	The preview has finished initializing.
EEventPreviewRendering	The preview rendering is in progress.
EEventPreviewRenderingComplete	The preview rendering is complete.

Enum TOperation

Flags to control the operations or transforms on an image.

Enumerators

EOperationNone = 0x0	No operation.
EOperationRotate90 = 0x1	Rotate 90 degrees clockwise.
EOperationRotate180 = 0x2	Rotate 180 degrees clockwise.
EOperationRotate270 = 0x4	Rotate 270 degrees clockwise.
EOperationMirrorHorizontalAxis = 0x8	Horizontal flip (mirror over horizontal axis).
EOperationMirrorHorizontalAxisRotate90 = 0x10	Horizontal flip (mirror over horizontal axis) then rotate 90 degrees clockwise.
EOperationMirrorVerticalAxis = 0x20	Vertical flip (mirror over vertical axis).
EOperationMirrorVerticalAxisRotate90 = 0x40	Vertical flip (mirror over vertical axis) then rotate 90 degrees clockwise.

Enum TOptions

Flags to control how the image is processed.

Enumerators

EOptionNone = 0x00	No flag set
EOptionSyncProcessing = 0x01	Effects, geometric operations and rendering are applied synchronously. The default is asynchronously.
EOptionExifMetadataProcessing = 0x02	The Exif data from the source image is parsed and transferred to the destination image.

Enum TState

Possible states for the image processor.

Enumerators

EUninitialized = 0	Image processor not initalized.
EInitializing	Image processor initalizing.
EInitialized	Image processor initalized.
EEffectActive	Effect active.
EProcessing	Image processor processing an image.
EPreviewInitializing	Preview initializing.
EPreviewRendering	Preview Rendering.
EStatesCount	Count of valid states (boundary marker - not a true state).

Member Data Documentation

CImageProcessorImpl * iImplementation

CImageProcessorImpl *

iImplementation

[private]