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CWriteFaxPages Class Reference

class CWriteFaxPages : public CBase

Adds pages to a fax file.

The class is used by first calling StartPage() to define the compression and resolution of the fax page, and then calling AddEncodedScanLineL() or AddScanLineL() to add each of the page's encoded or raw scan lines. When the page is complete, the EndPage() function adds the scan line compression, scan line resolution, and sender Id information to the store.

In pre-v5.1 releases of Symbian OS, the import library was faxst2.lib.

Inherits from

CWriteFaxPages
- CBase

Public Member Functions
	~CWriteFaxPages()
IMPORT_C void	AddEncodedScanLineL(const TDesC8 &)
IMPORT_C void	AddScanLineL(const TDesC8 &)
IMPORT_C TStreamId	CommitPageL()
IMPORT_C void	EndPageL(TFaxResolution, TFaxBufSenderId &, TFaxCompression, TInt)
IMPORT_C CWriteFaxPages *	NewL(CStreamStore &, TInt)
IMPORT_C void	StartPage(TFaxResolution, TFaxCompression, TInt)

Protected Member Functions
	CWriteFaxPages(CStreamStore &, TInt)
TBool	BandCompleted()
void	ConstructL()

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()

Private Attributes
CFaxPageInfo *	iCurrentPage
TBuf8< KFaxT4MaxDesLength >	iEncodedScanLine
CFaxPages *	iFaxPages
CFaxT4 *	iFaxT4
TInt	iMaxScanLinesInBand
CStreamStore *	iStore
RStoreWriteStream	iWriteStream

Constructor & Destructor Documentation

CWriteFaxPages(CStreamStore &, TInt)

CWriteFaxPages	(	CStreamStore &	aStore,
		TInt	aMaxScanLinesInBand
	)	[protected]

Parameters

CStreamStore & aStore
TInt aMaxScanLinesInBand

~CWriteFaxPages()

IMPORT_C

~CWriteFaxPages

(

)

Destructor.

Closes the write stream, and frees all resources owned by the object, prior to its destruction.

Member Functions Documentation

AddEncodedScanLineL(const TDesC8 &)

IMPORT_C void

AddEncodedScanLineL

(

const TDesC8 &

anEncodedScanLine

)

Adds encoded scan lines to the write stream.

capability: None

Parameters

const TDesC8 & anEncodedScanLine

The encoded scan line (MH or MR).

AddScanLineL(const TDesC8 &)

IMPORT_C void

AddScanLineL

(

const TDesC8 &

aScanline

)

Adds raw scan lines to the write stream.

The function first encodes the scan line, using the format specified in the StartPage() function, and then adds it to the write stream.

capability: None

Parameters

const TDesC8 & aScanline

The current raw scan line.

BandCompleted()

TBool

BandCompleted

(

)

[protected]

CommitPageL()

IMPORT_C TStreamId

CommitPageL

(

)

Place FaxPages into write stream.

capability: None

ConstructL()

void

ConstructL

(

)

[protected]

EndPageL(TFaxResolution, TFaxBufSenderId &, TFaxCompression, TInt)

IMPORT_C void	EndPageL	(	TFaxResolution	aResolution,
			TFaxBufSenderId &	aSenderId,
			TFaxCompression	aCompression = EModifiedHuffman,
			TInt	aFlag2 = 0
		)

Sets parameters for the current page, writes it to the stream and appends to the fax pages set.

capability: None

Parameters

TFaxResolution aResolution	defines fax resolution
TFaxBufSenderId & aSenderId	Sender Id.
TFaxCompression aCompression = EModifiedHuffman	defines fax compression
TInt aFlag2 = 0	reserved flag.

NewL(CStreamStore &, TInt)

IMPORT_C CWriteFaxPages *	NewL	(	CStreamStore &	aStore,
			TInt	aMaxScanLinesInBand = 0
		)	[static]

Creates a CWriteFaxPages object, which offers the public API for writing fax pages to a stream store.

This function is called by CWriteFaxFile as part of creating a fax file.

leave: KErrNoMemory There is insufficient memory to perform the operation.

capability: None

Parameters

CStreamStore & aStore	The store to which fax pages are to be added.
TInt aMaxScanLinesInBand = 0	The maximum number of scan lines in a band. Faxes pages are stored in bands - to speed up display time. It is recommended that developers use 64 - the value used by CWriteFaxFile.

StartPage(TFaxResolution, TFaxCompression, TInt)

IMPORT_C void	StartPage	(	TFaxResolution	aResolution,
			TFaxCompression	aCompression,
			TInt	aFlag2 = 0
		)

Initialize fax page, set page parameters.

capability: None

Parameters

TFaxResolution aResolution	defines fax resolution
TFaxCompression aCompression	defines fax compression
TInt aFlag2 = 0	reserved flag.

Member Data Documentation

CFaxPageInfo * iCurrentPage

CFaxPageInfo *

iCurrentPage

[private]

TBuf8< KFaxT4MaxDesLength > iEncodedScanLine

TBuf8< KFaxT4MaxDesLength >

iEncodedScanLine

[private]

CFaxPages * iFaxPages

CFaxPages *

iFaxPages

[private]

CFaxT4 * iFaxT4

CFaxT4 *

iFaxT4

[private]

TInt iMaxScanLinesInBand

TInt

iMaxScanLinesInBand

[private]

CStreamStore * iStore

CStreamStore *

iStore

[private]

RStoreWriteStream iWriteStream

RStoreWriteStream

iWriteStream

[private]