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Class jclass.image.GifConverter

java.lang.Object
   |
   +----jclass.image.GifConverter

public class GifConverter

extends Object

implements ImageConsumer

GifConverter(Image, OutputStream)

GifConverter(ImageProducer, OutputStream)

convert()

convertSynchronous()

convertSynchronous() finds out which thread is doing the image production then join()s it.

getThread()

ImageProducers do their thing in their own thread.

imageComplete(int)

The following methods are all ImageConsumer memebers and are how GifConverter gets the image data imageComplete() is called when the ImageProducer has sent all its data to the ImageConsumer, thus this is our cue to start doing the output in GIF format.

setColorModel(ColorModel)

setDestination(OutputStream)

setDimensions(int, int)

setHints(int)

setPixels(int, int, int, int, ColorModel, byte[], int, int)

There are two flavours of setPixels() - one for 8 bit images, one for 24 bit images.

setPixels(int, int, int, int, ColorModel, int[], int, int)

setProperties(Hashtable)

The properties are ignored, as they're undocumented anyways.

setSource(Image)

  public GifConverter(ImageProducer ip,
                      OutputStream os)

  public GifConverter(Image i,
                      OutputStream os)

  public void setSource(Image i)

  public void setDestination(OutputStream os)

  public Thread getThread()

ImageProducers do their thing in their own thread. Which thread is doing the work?

  public synchronized void convert() throws IOException

  public synchronized void convertSynchronous() throws IOException

convertSynchronous() finds out which thread is doing the image production then join()s it.

  public void imageComplete(int status)

The following methods are all ImageConsumer memebers and are how GifConverter gets the image data imageComplete() is called when the ImageProducer has sent all its data to the ImageConsumer, thus this is our cue to start doing the output in GIF format.

  public void setColorModel(ColorModel model)

  public void setDimensions(int width,
                            int height)

  public void setHints(int hints)

  public void setPixels(int x,
                        int y,
                        int w,
                        int h,
                        ColorModel model,
                        byte pixels[],
                        int off,
                        int scansize)

There are two flavours of setPixels() - one for 8 bit images, one for 24 bit images. In theory you can't really predict which is going to get called and due to sloppy specifications, you really can't predict it in practice either. Therefore, GifConverter is set up to handle data coming in through either version of setPixels().

  public void setPixels(int x,
                        int y,
                        int w,
                        int h,
                        ColorModel model,
                        int pixels[],
                        int off,
                        int scansize)

  public void setProperties(Hashtable props)

The properties are ignored, as they're undocumented anyways.

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