Celartem::DjVu::JBIG2EncodeHelper Class Reference

#include <djv_jbig2encoder.h>

Inheritance diagram for Celartem::DjVu::JBIG2EncodeHelper:

List of all members.

Public Member Functions
virtual void	encodeDict (Stream *inStream, const JB2Dictionary *inDict=NULL)=0
virtual AutoPtr< Chunk >	encodeJB2dChunk (const JB2Dictionary *inDict=NULL)=0
virtual void	encodePage (Stream *inStream, const JB2Page *inPage)=0
virtual AutoPtr< Chunk >	encodeJB2pChunk (const JB2Page *inPage)=0
Static Public Member Functions
static AutoPtr< JBIG2EncodeHelper >	create (bool inUseRefine)

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Detailed Description

This class provides supplemental functions to encode JBIG2 images.
Please note that the encoder equips only some parts of JBIG2 specification enough to support JBIG2 on DjVu and PDF.

See also:

JB2Page, JBIG2DecodeHelper

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Member Function Documentation

static AutoPtr<JBIG2EncodeHelper> Celartem::DjVu::JBIG2EncodeHelper::create

(

bool

inUseRefine

)

[static]

Create a JBIG2EncodeHelper instance. This class is used with JB2Page to encode JBIG2 data.

Parameters:

inUseRefine

Although refinement improves JBIG2 compression ratio, it causes crash in Adobe products.

virtual void Celartem::DjVu::JBIG2EncodeHelper::encodeDict	(	Stream *	inStream,
		const JB2Dictionary *	inDict = NULL
	)			[pure virtual]

Encode JBIG2 dictionary.
This method throws an exception if no dictionary is specified either explicitly or implicitly.

Parameters:

	inStream	Stream write to.
	inDict	Dictionary to write. If any encodePage calls with a page associated with a dictionary before this call, inDict can be NULL.

virtual AutoPtr<Chunk> Celartem::DjVu::JBIG2EncodeHelper::encodeJB2dChunk

(

const JB2Dictionary *

inDict = NULL

)

[pure virtual]

Encode JBIG2 dictionary (JB2d).
This method throws an exception if no dictionary is specified either explicitly or implicitly.

Parameters:

inDict

Dictionary to write. If any encodePage calls with a page associated with a dictionary before this call, inDict can be NULL.

Returns:

Pointer to a newly created JB2d chunk.

virtual AutoPtr<Chunk> Celartem::DjVu::JBIG2EncodeHelper::encodeJB2pChunk

(

const JB2Page *

inPage

)

[pure virtual]

Encode JBIG2 page (JB2p).

Parameters:

inPage

Page to encode. If the page has associated with a dictionary, the dictionary should be also encoded separatedly.

Returns:

Pointer to a newly created JB2p chunk.

virtual void Celartem::DjVu::JBIG2EncodeHelper::encodePage	(	Stream *	inStream,
		const JB2Page *	inPage
	)			[pure virtual]

Encode JBIG2 page.

Parameters:

	inStream	Stream write to.
	inPage	Page to encode. If the page has associated with a dictionary, the dictionary should be also encoded separatedly.

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The documentation for this class was generated from the following file:

• djv_jbig2encoder.h