com.itextpdf.pdfoptimizer.handlers.imagequality.processors

Class JpegCompressor

java.lang.Object

com.itextpdf.pdfoptimizer.handlers.imagequality.processors.JpegCompressor

All Implemented Interfaces:

IImageProcessor

public class JpegCompressor
extends Object
implements IImageProcessor

Class is used to compress images as JPEG. If the PdfImageXObject has /Mask entry as PdfArray then it will be converted into mask as a stream.

Constructor Summary

Constructors

Constructor and Description
JpegCompressor(double compressionLevel) Creates an instance of JPEG image processor.

Method Summary

Modifier and Type	Method and Description
com.itextpdf.kernel.pdf.xobject.PdfImageXObject	processImage(com.itextpdf.kernel.pdf.xobject.PdfImageXObject objectToProcess, OptimizationSession session) Compresses a JPEG image presented as PdfImageXObject with the configured compression level.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JpegCompressor

public JpegCompressor(double compressionLevel)

Creates an instance of JPEG image processor.

Parameters:

compressionLevel - is a compression coefficient. The value should be in range [0.0, 1.0]

Method Detail

processImage

public com.itextpdf.kernel.pdf.xobject.PdfImageXObject processImage(com.itextpdf.kernel.pdf.xobject.PdfImageXObject objectToProcess,
                                                                    OptimizationSession session)
                                                             throws IOException

Compresses a JPEG image presented as PdfImageXObject with the configured compression level.

Specified by:

processImage in interface IImageProcessor

Parameters:

objectToProcess - is a PdfImageXObject representing the image

session - is an auxiliary object used to support share data between stages of optimization process

Returns:

processed image if processing can be performed and the same instance otherwise

Throws:

IOException - if image cannot be compressed as JPEG image