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Class relaaja.gui.GIFEncoder

java.lang.Object
   |
   +----relaaja.gui.GIFEncoder

public class GIFEncoder
extends Object

GIFEncoder is a class which takes an image and saves it to a stream using the GIF file format (Graphics Interchange Format). A GIFEncoder is constructed with either an AWT Image (which must be fully loaded) or a set of RGB arrays. The image can be written out with a call to Write.

Three caveats:

GIFEncoder will convert the image to indexed color upon construction. This will take some time, depending on the size of the image. Also, actually writing the image out (Write) will take time.
The image cannot have more than 256 colors, since GIF is an 8 bit format. For a 24 bit to 8 bit quantization algorithm, see Graphics Gems II III.2 by Xialoin Wu. Or check out his C source.
Since the image must be completely loaded into memory, GIFEncoder may have problems with large images. Attempting to encode an image which will not fit into memory will probably result in the following exception:
java.awt.AWTException: Grabber returned false: 192
The class was modified to constuct with Ury Segal's BMP class, and it works faster that way
Made it more memory-conservative (Antti Koivisto)

GIFEncoder is based upon gifsave.c, which was written and released by:

Sverre H. Huseby
Bjoelsengt. 17
N-0468 Oslo
Norway

Phone: +47 2 230539
sverrehu@ifi.uio.no

Author:: Adam Doppelt

colors_
height_
id_
MAX_MEM
numColors_
pixels_
sd_
width_

GIFEncoder(Image)

write(OutputStream): Writes the image out to a stream in the GIF file format.

width_

 short width_

height_

 short height_

numColors_

 int numColors_

pixels_

 byte pixels_[]

colors_

 byte colors_[]

sd_

 ScreenDescriptor sd_

id_

 ImageDescriptor id_

MAX_MEM

 public static final int MAX_MEM

GIFEncoder

 public GIFEncoder(Image image) throws AWTException

write

 public void write(OutputStream output) throws IOException

Writes the image out to a stream in the GIF file format. This will be a single GIF87a image, non-interlaced, with no background color.

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