writes an image stage to a JPEG file More...

Inheritance diagram for JpegImageWriter:

Public Member Functions
	JpegImageWriter (void)
virtual	~JpegImageWriter (void)
LT_STATUS	initialize (LTIImageStage *imageStage, lt_int32 quality=0, lt_int32 smoothing=0)
	initialize
LT_STATUS	writeBegin (const LTIScene &scene)
	begin an encode (write) operation
LT_STATUS	writeStrip (LTISceneBuffer &stripBuffer, const LTIScene &stripScene)
	encode one strip of the scene
LT_STATUS	writeEnd ()
	complete an encode (write) operation

Detailed Description

This class writes an image stage to a JPEG file.

Definition at line 31 of file JpegImageWriter.h.

Constructor & Destructor Documentation

JpegImageWriter::JpegImageWriter ( void )

virtual JpegImageWriter::~JpegImageWriter ( void ) [virtual]

LT_STATUS JpegImageWriter::initialize	(	LTIImageStage *	imageStage,
		lt_int32	quality = `0`,
		lt_int32	smoothing = `0`
	)

Initialize a writer for JPEG images.

Parameters:

imageStage	the image to write from
quality	sets the JPEG "quality" encoding parameter; this is a value between 0 and 100
smoothing	sets the JPEG "smoothing" encoding parameter; this is a value between 0 and 100

LT_STATUS JpegImageWriter::writeBegin ( const LTIScene & scene ) [virtual]

This function implements the logic for beginning the encoding of the given scene.

The scene must be a valid scene for the underlying image pipeline.

This function is called by write(). Derived classes must implement this function.

Parameters:

scene the scene to decode and output

LT_STATUS JpegImageWriter::writeEnd ( ) [virtual]

This function implements the logic for completing the encoding of the given scene.

This function is called by write(). Derived classes must implement this function.

LT_STATUS JpegImageWriter::writeStrip	(	LTISceneBuffer &	stripBuffer,
		const LTIScene &	stripScene
	)		`[virtual]`

This function implements the logic for actually encoding a given strip of the given scene.

This function is called by write(). Derived classes must implement this function.

Parameters:

stripBuffer	the pixels for the current strip
stripScene	the scene representing the strip being written

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