org.tn5250j.tools.encoder

Class AbstractImageEncoder

java.lang.Object

org.tn5250j.tools.encoder.AbstractImageEncoder

All Implemented Interfaces:

Encoder

Direct Known Subclasses:

PNGEncoder

public abstract class AbstractImageEncoder
extends Object
implements Encoder

This is the base class for encoding a component to a stream file.

Field Summary

Fields

Modifier and Type	Field and Description
protected Image	img
protected OutputStream	ofile

Constructor Summary

Constructors

Constructor and Description
AbstractImageEncoder()

Method Summary

Modifier and Type	Method and Description
static byte	byteFromChar(char ochar)
static byte	byteFromInt(int value)
static byte[]	bytesFromLong(long value)
byte	compressColor(int clr) Compress the given color into one 8 bit representation.
byte	compressColor(int red, int green, int blue) Compress the given color into one 8 bit representation.
byte	createByte(int b7, int b6, int b5, int b4, int b3, int b2, int b1, int b0)
void	encode(Component component, OutputStream os) Encode the specified component on the specified stream
void	encode(Image image, OutputStream os)
protected void	error(String msg)
abstract void	saveImage()
static Image	snapshot(Component component)

Methods inherited from class java.lang.Object

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

Field Detail

img

protected Image img

ofile

protected OutputStream ofile

Constructor Detail

AbstractImageEncoder

public AbstractImageEncoder()

Method Detail

encode

public void encode(Image image,
                   OutputStream os)
            throws IOException,
                   EncoderException

Throws:

IOException

EncoderException

encode

public void encode(Component component,
                   OutputStream os)
            throws IOException,
                   EncoderException

Description copied from interface: Encoder

Encode the specified component on the specified stream

Specified by:

encode in interface Encoder

Parameters:

component - component

os - an outputstream

Throws:

IOException - an exception

EncoderException - an encoder exception

snapshot

public static Image snapshot(Component component)

saveImage

public abstract void saveImage()
                        throws IOException,
                               EncoderException

Throws:

IOException

EncoderException

createByte

public byte createByte(int b7,
                       int b6,
                       int b5,
                       int b4,
                       int b3,
                       int b2,
                       int b1,
                       int b0)

byteFromInt

public static byte byteFromInt(int value)

bytesFromLong

public static byte[] bytesFromLong(long value)

byteFromChar

public static byte byteFromChar(char ochar)

compressColor

public byte compressColor(int clr)

Compress the given color into one 8 bit representation.

Parameters:

clr - integer representation of rgb value (lowest byte is blue, second lowest byte is green, third lowest byte is red)

Returns:

color compressed into 8-bit representation

compressColor

public byte compressColor(int red,
                          int green,
                          int blue)

Compress the given color into one 8 bit representation.

Parameters:

red - value of the red portion of the color

green - value of the green portion of the color

blue - value of the blue portion of the color

Returns:

color compressed into 8-bit representation

error

protected void error(String msg)
              throws EncoderException

Throws:

EncoderException