to.etc.sjit

Class GifHandlerBase

java.lang.Object

to.etc.sjit.GifHandlerBase

Direct Known Subclasses:

GifIndexedHandler

public abstract class GifHandlerBase
extends Object

Part of the GIF encoder, this class is the base class for each specialized BufferedImage writer. It contains the base code to determine where to write in the BufferedImage.

Field Summary

Fields

Modifier and Type	Field and Description
protected BufferedImage	m_bi
protected AnimGifDecoder	m_gd
protected int	m_h
protected GifImaMeta	m_im
protected int	m_interlace_phase
protected int	m_out_e
protected int	m_out_o
protected int	m_type
protected int	m_w
protected int	m_x
protected int	m_y

Constructor Summary

Constructors

Constructor and Description
GifHandlerBase(AnimGifDecoder gd, GifImaMeta im, int type)

Method Summary

Modifier and Type	Method and Description
protected int	getOffset()
protected int	getRunMax() Returns the #of pixels that can be written in one go, before end-of-line processing has to take place.
protected int	getX()
protected int	getY()
protected void	incrementPos(int nwritten) Increments the pixel position for when n pixels are written.
protected abstract void	pixels(byte[] pix, int len) Called when a new set of pixels is available.
protected abstract BufferedImage	prepare() Called when the image-to-decode's metadata is known and decoding will commence.

Methods inherited from class java.lang.Object

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

Field Detail

m_gd

protected AnimGifDecoder m_gd

m_im

protected GifImaMeta m_im

m_type

protected int m_type

m_bi

protected BufferedImage m_bi

m_interlace_phase

protected int m_interlace_phase

m_out_o

protected int m_out_o

m_x

protected int m_x

m_y

protected int m_y

m_out_e

protected int m_out_e

m_w

protected int m_w

m_h

protected int m_h

Constructor Detail

GifHandlerBase

public GifHandlerBase(AnimGifDecoder gd,
                      GifImaMeta im,
                      int type)

Method Detail

getRunMax

protected int getRunMax()

Returns the #of pixels that can be written in one go, before end-of-line processing has to take place.

incrementPos

protected void incrementPos(int nwritten)

Increments the pixel position for when n pixels are written. If the current position exceeds a line AND if we're interlaced a new position will be calculated.

getOffset

protected int getOffset()

getX

protected int getX()

getY

protected int getY()

prepare

protected abstract BufferedImage prepare()
                                  throws IOException

Called when the image-to-decode's metadata is known and decoding will commence. This will create the actual BufferedImage and will set up the code to write pixels to the image as fast as possible.

Throws:

IOException

pixels

protected abstract void pixels(byte[] pix,
                               int len)
                        throws IOException

Called when a new set of pixels is available. This writes the pixels to the appropriate position within the image.

Throws:

IOException