MrSID Decode SDK for Raster Reference Manual  9.0.0.3864
JpegImageWriter Class Reference

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

#include <JpegImageWriter.h>

Inheritance diagram for JpegImageWriter:
LTIGeoFileImageWriter LTIImageWriter

List of all members.

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.

Examples:
DecodeJP2ToJPG.cpp.

Definition at line 31 of file JpegImageWriter.h.


Constructor & Destructor Documentation

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

Member Function Documentation

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

Initialize a writer for JPEG images.

Parameters:
imageStagethe image to write from
qualitysets the JPEG "quality" encoding parameter; this is a value between 0 and 100
smoothingsets 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:
scenethe scene to decode and output
Returns:
status code indicating success or failure

Reimplemented from LTIGeoFileImageWriter.

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.

Returns:
status code indicating success or failure

Reimplemented from LTIGeoFileImageWriter.

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:
stripBufferthe pixels for the current strip
stripScenethe scene representing the strip being written
Returns:
status code indicating success or failure

Implements LTIGeoFileImageWriter.


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