Package steganography.image.encoders

Class GifDecoder

java.lang.Object

steganography.image.encoders.GifDecoder

public final class GifDecoder
extends java.lang.Object

A decoder capable of processing a GIF data stream to render the graphics contained in it. This implementation follows the official GIF specification.

Example usage:

 final GifImage gifImage = GifDecoder.read(int[] data);
 final int width = gifImage.getWidth();
 final int height = gifImage.getHeight();
 final int frameCount = gifImage.getFrameCount();
 for (int i = 0; i < frameCount; i++) {
        final BufferedImage image = gifImage.getFrame(i);
        final int delay = gif.getDelay(i);
 }
 

Author:

Dhyan Blum

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	GifDecoder.GifImage

Constructor Summary

Constructors

Constructor	Description
GifDecoder()

Method Summary

Modifier and Type	Method	Description
static GifDecoder.GifImage	read(byte[] in)
static GifDecoder.GifImage	read(java.io.InputStream is)

Methods inherited from class java.lang.Object

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

Constructor Detail

GifDecoder

public GifDecoder()

Method Detail

read

public static final GifDecoder.GifImage read(byte[] in)
                                      throws java.io.IOException

Parameters:

in - Raw image data as a byte[] array

Returns:

A GifImage object exposing the properties of the GIF image.

Throws:

java.io.IOException - If the image violates the GIF specification or is truncated.

read

public static final GifDecoder.GifImage read(java.io.InputStream is)
                                      throws java.io.IOException

Parameters:

is - Image data as input stream. This method will read from the input stream's current position. It will not reset the position before reading and won't reset or close the stream afterwards. Call these methods before and after calling this method as needed.

Returns:

A GifImage object exposing the properties of the GIF image.

Throws:

java.io.IOException - If an I/O error occurs, the image violates the GIF specification or the GIF is truncated.