com.lowagie.text.pdf.codec
Class PngImage

java.lang.Object
  com.lowagie.text.pdf.codec.PngImage

public class PngImage
extends java.lang.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

static java.lang.String	cHRM A PNG marker.
static java.lang.String	gAMA A PNG marker.
static java.lang.String	iCCP A PNG marker.
static java.lang.String	IDAT A PNG marker.
static java.lang.String	IEND A PNG marker.
static java.lang.String	IHDR A PNG marker.
static java.lang.String	pHYs A PNG marker.
static java.lang.String	PLTE A PNG marker.
static int[]	PNGID Some PNG specific values.
static java.lang.String	sRGB A PNG marker.
static java.lang.String	tRNS A PNG marker.

Method Summary

static Image	getImage(byte[] data) Reads a PNG from a byte array.
static Image	getImage(java.io.InputStream is) Reads a PNG from a stream.
static Image	getImage(java.lang.String file) Reads a PNG from a file.
static Image	getImage(java.net.URL url) Reads a PNG from an url.
static int	getInt(java.io.InputStream is) Gets an int from an InputStream.
static java.lang.String	getString(java.io.InputStream is) Gets a String from an InputStream.
static int	getWord(java.io.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 Detail

PNGID

public static final int[] PNGID

Some PNG specific values.

IHDR

public static final java.lang.String IHDR

A PNG marker.

See Also:

Constant Field Values

PLTE

public static final java.lang.String PLTE

A PNG marker.

See Also:

Constant Field Values

IDAT

public static final java.lang.String IDAT

A PNG marker.

See Also:

Constant Field Values

IEND

public static final java.lang.String IEND

A PNG marker.

See Also:

Constant Field Values

tRNS

public static final java.lang.String tRNS

A PNG marker.

See Also:

Constant Field Values

pHYs

public static final java.lang.String pHYs

A PNG marker.

See Also:

Constant Field Values

gAMA

public static final java.lang.String gAMA

A PNG marker.

See Also:

Constant Field Values

cHRM

public static final java.lang.String cHRM

A PNG marker.

See Also:

Constant Field Values

sRGB

public static final java.lang.String sRGB

A PNG marker.

See Also:

Constant Field Values

iCCP

public static final java.lang.String iCCP

A PNG marker.

See Also:

Constant Field Values

Method Detail

getImage

public static Image getImage(java.net.URL url)
                      throws java.io.IOException

Reads a PNG from an url.

Parameters:

url - the url

Returns:

the image

Throws:

java.io.IOException - on error

getImage

public static Image getImage(java.io.InputStream is)
                      throws java.io.IOException

Reads a PNG from a stream.

Parameters:

is - the stream

Returns:

the image

Throws:

java.io.IOException - on error

getImage

public static Image getImage(java.lang.String file)
                      throws java.io.IOException

Reads a PNG from a file.

Parameters:

file - the file

Returns:

the image

Throws:

java.io.IOException - on error

getImage

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

Reads a PNG from a byte array.

Parameters:

data - the byte array

Returns:

the image

Throws:

java.io.IOException - on error

getInt

public static final int getInt(java.io.InputStream is)
                        throws java.io.IOException

Gets an int from an InputStream.

Parameters:

is - an InputStream

Returns:

the value of an int

Throws:

java.io.IOException

getWord

public static final int getWord(java.io.InputStream is)
                         throws java.io.IOException

Gets a word from an InputStream.

Parameters:

is - an InputStream

Returns:

the value of an int

Throws:

java.io.IOException

getString

public static final java.lang.String getString(java.io.InputStream is)
                                        throws java.io.IOException

Gets a String from an InputStream.

Parameters:

is - an InputStream

Returns:

the value of an int

Throws:

java.io.IOException