com.sun.javafx.iio.gif

Class GIFImageLoader2

java.lang.Object

com.sun.javafx.iio.common.ImageLoaderImpl

com.sun.javafx.iio.gif.GIFImageLoader2

All Implemented Interfaces:

ImageLoader

public class GIFImageLoader2
extends ImageLoaderImpl

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
(package private) class	GIFImageLoader2.LZWDecoder

Field Summary

Fields

Modifier and Type	Field and Description
(package private) int	bgColor
(package private) static int	DEFAULT_FPS
(package private) static byte[]	FILE_SIG87
(package private) static byte[]	FILE_SIG89
(package private) byte[][]	globalPalette
(package private) byte[]	image
(package private) int	loopCount
(package private) static byte[]	NETSCAPE_SIG
(package private) int	screenH
(package private) int	screenW
(package private) java.io.InputStream	stream

Fields inherited from class com.sun.javafx.iio.common.ImageLoaderImpl

formatDescription, lastPercentDone, listeners

Constructor Summary

Constructors

Constructor and Description
GIFImageLoader2(java.io.InputStream input)

Method Summary

Modifier and Type	Method and Description
private int[]	computeInterlaceReIndex(int h)
private void	consumeAnExtension()
private void	decodeImage(byte[] image, int w, int h, int[] interlace)
private java.nio.ByteBuffer	decodePalette(byte[] srcImage, byte[][] palette, int trnsIndex, int left, int top, int w, int h, int disposalCode)
void	dispose() Disposes of any resources (such as native libraries) held by this loader.
ImageFrame	load(int imageIndex, int width, int height, boolean preserveAspectRatio, boolean smooth) Loads the image at a given index in an image stream.
private void	readAppExtension()
private int	readByte()
private byte[]	readBytes(byte[] data)
private byte[]	readBytes(byte[] data, int offs, int size)
private int	readControlCode()
private void	readGlobalHeader()
private byte[][]	readPalete(int size, int trnsIndex)
private int	readShort()
private void	restoreToBackground(byte[] img, int left, int top, int w, int h)
private void	skipBytes(int n)
private ImageMetadata	updateMetadata(int w, int h, int delayTime)
private int	waitForImageFrame()

Methods inherited from class com.sun.javafx.iio.common.ImageLoaderImpl

addListener, emitWarning, getFormatDescription, removeListener, updateImageMetadata, updateImageProgress

Methods inherited from class java.lang.Object

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

Field Detail

FILE_SIG87

static final byte[] FILE_SIG87

FILE_SIG89

static final byte[] FILE_SIG89

NETSCAPE_SIG

static final byte[] NETSCAPE_SIG

DEFAULT_FPS

static final int DEFAULT_FPS

See Also:

Constant Field Values

stream

java.io.InputStream stream

screenW

int screenW

screenH

int screenH

bgColor

int bgColor

globalPalette

byte[][] globalPalette

image

byte[] image

loopCount

int loopCount

Constructor Detail

GIFImageLoader2

public GIFImageLoader2(java.io.InputStream input)
                throws java.io.IOException

Throws:

java.io.IOException

Method Detail

readGlobalHeader

private void readGlobalHeader()
                       throws java.io.IOException

Throws:

java.io.IOException

readPalete

private byte[][] readPalete(int size,
                            int trnsIndex)
                     throws java.io.IOException

Throws:

java.io.IOException

consumeAnExtension

private void consumeAnExtension()
                         throws java.io.IOException

Throws:

java.io.IOException

readAppExtension

private void readAppExtension()
                       throws java.io.IOException

Throws:

java.io.IOException

readControlCode

private int readControlCode()
                     throws java.io.IOException

Throws:

java.io.IOException

waitForImageFrame

private int waitForImageFrame()
                       throws java.io.IOException

Throws:

java.io.IOException

decodeImage

private void decodeImage(byte[] image,
                         int w,
                         int h,
                         int[] interlace)
                  throws java.io.IOException

Throws:

java.io.IOException

computeInterlaceReIndex

private int[] computeInterlaceReIndex(int h)

load

public ImageFrame load(int imageIndex,
                       int width,
                       int height,
                       boolean preserveAspectRatio,
                       boolean smooth)
                throws java.io.IOException

Description copied from interface: ImageLoader

Loads the image at a given index in an image stream. If no image exists at that index null will be returned.

Parameters:

imageIndex - the zero-relative index of the image to load.

width - the desired image width. If non-positive, an IllegalArgumentException will be thrown.

height - the desired image height. If non-positive, an IllegalArgumentException will be thrown.

preserveAspectRatio - whether to preserve the width-to-height ratio of the image.

smooth - whether to use a smooth downscaling algorithm.

Returns:

the image at the specified index or null on error.

Throws:

java.io.IOException

readByte

private int readByte()
              throws java.io.IOException

Throws:

java.io.IOException

readShort

private int readShort()
               throws java.io.IOException

Throws:

java.io.IOException

readBytes

private byte[] readBytes(byte[] data)
                  throws java.io.IOException

Throws:

java.io.IOException

readBytes

private byte[] readBytes(byte[] data,
                         int offs,
                         int size)
                  throws java.io.IOException

Throws:

java.io.IOException

skipBytes

private void skipBytes(int n)
                throws java.io.IOException

Throws:

java.io.IOException

dispose

public void dispose()

Description copied from interface: ImageLoader

Disposes of any resources (such as native libraries) held by this loader. Any further invocation of any methods on this object are undefined.

restoreToBackground

private void restoreToBackground(byte[] img,
                                 int left,
                                 int top,
                                 int w,
                                 int h)

decodePalette

private java.nio.ByteBuffer decodePalette(byte[] srcImage,
                                          byte[][] palette,
                                          int trnsIndex,
                                          int left,
                                          int top,
                                          int w,
                                          int h,
                                          int disposalCode)

updateMetadata

private ImageMetadata updateMetadata(int w,
                                     int h,
                                     int delayTime)