Package com.lowagie.text.pdf.codec

Class PngImage

java.lang.Object

com.lowagie.text.pdf.codec.PngImage

public class PngImage
extends Object

Reads a PNG image. All types of PNG can be read.

It is based in part in the JAI codec.

Author:

Paulo Soares (psoares@consiste.pt)

Field Summary

Fields

Modifier and Type	Field	Description
static final String	cHRM	A PNG marker.
static final String	gAMA	A PNG marker.
static final String	iCCP	A PNG marker.
static final String	IDAT	A PNG marker.
static final String	IEND	A PNG marker.
static final String	IHDR	A PNG marker.
static final String	pHYs	A PNG marker.
static final String	PLTE	A PNG marker.
static final int[]	PNGID	Some PNG specific values.
static final String	sRGB	A PNG marker.
static final String	tRNS	A PNG marker.

Method Summary

Modifier and Type	Method	Description
static Image	getImage(byte[] data)	Reads a PNG from a byte array.
static Image	getImage(InputStream is)	Reads a PNG from a stream.
static Image	getImage(String file)	Reads a PNG from a file.
static Image	getImage(URL url)	Reads a PNG from an url.
static final int	getInt(InputStream is)	Gets an int from an InputStream.
static final String	getString(InputStream is)	Gets a String from an InputStream.
static final int	getWord(InputStream is)	Gets a word from an InputStream.

Methods inherited from class java.lang.Object

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

Field Details

PNGID

public static final int[] PNGID

Some PNG specific values.

IHDR

public static final String IHDR

A PNG marker.

See Also:

• Constant Field Values

PLTE

public static final String PLTE

A PNG marker.

See Also:

• Constant Field Values

IDAT

public static final String IDAT

A PNG marker.

See Also:

• Constant Field Values

IEND

public static final String IEND

A PNG marker.

See Also:

• Constant Field Values

tRNS

public static final String tRNS

A PNG marker.

See Also:

• Constant Field Values

pHYs

public static final String pHYs

A PNG marker.

See Also:

• Constant Field Values

gAMA

public static final String gAMA

A PNG marker.

See Also:

• Constant Field Values

cHRM

public static final String cHRM

A PNG marker.

See Also:

• Constant Field Values

sRGB

public static final String sRGB

A PNG marker.

See Also:

• Constant Field Values

iCCP

public static final String iCCP

A PNG marker.

See Also:

• Constant Field Values

Method Details

getImage

public static Image getImage(URL url)
                      throws IOException

Reads a PNG from an url.

Parameters:

url - the url

Returns:

the image

Throws:

IOException - on error

getImage

public static Image getImage(InputStream is)
                      throws IOException

Reads a PNG from a stream.

Parameters:

is - the stream

Returns:

the image

Throws:

IOException - on error

getImage

public static Image getImage(String file)
                      throws IOException

Reads a PNG from a file.

Parameters:

file - the file

Returns:

the image

Throws:

IOException - on error

getImage

public static Image getImage(byte[] data)
                      throws IOException

Reads a PNG from a byte array.

Parameters:

data - the byte array

Returns:

the image

Throws:

IOException - on error

getInt

public static final int getInt(InputStream is)
                        throws IOException

Gets an int from an InputStream.

Parameters:

is - an InputStream

Returns:

the value of an int

Throws:

IOException

getWord

public static final int getWord(InputStream is)
                         throws IOException

Gets a word from an InputStream.

Parameters:

is - an InputStream

Returns:

the value of an int

Throws:

IOException

getString

public static final String getString(InputStream is)
                              throws IOException

Gets a String from an InputStream.

Parameters:

is - an InputStream

Returns:

the value of an int

Throws:

IOException