Inheritance diagram for IJPEGDecoder:

Public Member Functions
virtual bool16	Open (JPEGReadInfo jpegReadInfo, IPMStream iPMStream)=0

virtual bool16	ReadRows (char *rowBuffer, uint32 numberOfRows)=0

virtual bool16	Close ()=0

Public Member Functions inherited from IPMUnknown
virtual IPMUnknown *	QueryInterface (PMIID interfaceID) const =0

virtual void	AddRef () const =0

virtual void	Release () const =0

Detailed Description

Interface for decoding JPEG compressed data

Member Function Documentation

virtual bool16 IJPEGDecoder::Close ( )

pure virtual

Close the stream and cleanup

virtual bool16 IJPEGDecoder::Open	(	JPEGReadInfo *	jpegReadInfo,
		IPMStream *	iPMStream
	)

pure virtual

Specify the input stream and read the JPEG tags.

Parameters

jpegReadInfo	- OUT: Pointer to a valid jpegReadInfo structure which client should memset to zeroes. Decoder will fill in the structure based on the JPEG tags.
iPMStream	- IN: input stream.

virtual bool16 IJPEGDecoder::ReadRows	(	char *	rowBuffer,
		uint32	numberOfRows
	)

pure virtual

Read numberOfRows of image data into rowBuffer. If rowBuffer is nil, then skip numberOfRows.

Parameters

rowBuffer	- OUT: destination buffer or nill to skip 'numberOfRows' rows.
numberOfRows	- IN: how many rows of data to read.