Module org.sejda.sambox

Package org.sejda.sambox.pdmodel.graphics.image

Class CCITTFactory

java.lang.Object

org.sejda.sambox.pdmodel.graphics.image.CCITTFactory

public final class CCITTFactory
extends Object

Factory for creating a PDImageXObject containing a CCITT Fax compressed TIFF image.

Constructor Summary

Constructors

Modifier	Constructor	Description
private	CCITTFactory()

Method Summary

Modifier and Type	Method	Description
static PDImageXObject	createFromFile(File file)	Creates a new CCITT Fax compressed Image XObject from the first page of a TIFF file.
static PDImageXObject	createFromFile(File file, int number)	Creates a new CCITT Fax compressed Image XObject from the first page of a TIFF file.
static PDImageXObject	createFromImage(BufferedImage image)	Creates a new CCITT group 4 (T6) compressed image XObject from a b/w BufferedImage.
private static PDImageXObject	createFromRandomAccessImpl(org.sejda.io.SeekableSource source, int number)	Creates a new CCITT Fax compressed Image XObject from a TIFF file.
static PDImageXObject	createFromSeekableSource(org.sejda.io.SeekableSource source)
static PDImageXObject	createFromSeekableSource(org.sejda.io.SeekableSource source, int number)
private static org.sejda.io.SeekableSource	extractFromTiff(org.sejda.io.SeekableSource source, COSDictionary params, int number)
private static PDImageXObject	prepareImageXObject(byte[] byteArray, int width, int height, PDColorSpace initColorSpace)
private static int	readlong(char endianess, org.sejda.io.SeekableSource source)
private static int	readshort(char endianess, org.sejda.io.SeekableSource source)

Methods inherited from class java.lang.Object

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

Constructor Details

CCITTFactory

private CCITTFactory()

Method Details

createFromImage

public static PDImageXObject createFromImage(BufferedImage image)
                                      throws IOException

Creates a new CCITT group 4 (T6) compressed image XObject from a b/w BufferedImage. This compression technique usually results in smaller images than those produced by LosslessFactory#createFromImage(PDDocument, BufferedImage).

Parameters:

image - the image.

Returns:

a new image XObject.

Throws:

IOException - if there is an error creating the image.

IllegalArgumentException - if the BufferedImage is not a b/w image.

prepareImageXObject

private static PDImageXObject prepareImageXObject(byte[] byteArray,
 int width,
 int height,
 PDColorSpace initColorSpace)
                                           throws IOException

Throws:

IOException

createFromFile

public static PDImageXObject createFromFile(File file)
                                     throws IOException

Creates a new CCITT Fax compressed Image XObject from the first page of a TIFF file.

Parameters:

file - the TIFF file which contains a suitable CCITT compressed image

Returns:

a new Image XObject

Throws:

IOException - if there is an error reading the TIFF data.

createFromFile

public static PDImageXObject createFromFile(File file,
 int number)
                                     throws IOException

Creates a new CCITT Fax compressed Image XObject from the first page of a TIFF file.

Parameters:

file - the TIFF file which contains a suitable CCITT compressed image

number - TIFF image number, starting from 0

Returns:

a new Image XObject

Throws:

IOException - if there is an error reading the TIFF data.

createFromSeekableSource

public static PDImageXObject createFromSeekableSource(org.sejda.io.SeekableSource source)
                                               throws IOException

Throws:

IOException

createFromSeekableSource

public static PDImageXObject createFromSeekableSource(org.sejda.io.SeekableSource source,
 int number)
                                               throws IOException

Throws:

IOException

createFromRandomAccessImpl

private static PDImageXObject createFromRandomAccessImpl(org.sejda.io.SeekableSource source,
 int number)
                                                  throws IOException

Creates a new CCITT Fax compressed Image XObject from a TIFF file.

Parameters:

source - the random access TIFF file which contains a suitable CCITT compressed image

number - TIFF image number, starting from 0

Returns:

a new Image XObject, or null if no such page

Throws:

IOException - if there is an error reading the TIFF data.

extractFromTiff

private static org.sejda.io.SeekableSource extractFromTiff(org.sejda.io.SeekableSource source,
 COSDictionary params,
 int number)
                                                    throws IOException

Throws:

IOException

readshort

private static int readshort(char endianess,
 org.sejda.io.SeekableSource source)
                      throws IOException

Throws:

IOException

readlong

private static int readlong(char endianess,
 org.sejda.io.SeekableSource source)
                     throws IOException

Throws:

IOException