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Java Source Code / Java Documentation » Testing » abbot 1.0.1 » abbot.editor.widgets

Source Cross Reference

Class Diagram

Java Document (Java Doc)

java.lang .Object

abbot.editor.widgets .GifDecoder

GifDecoder
public class GifDecoder (Code)
	Class GifDecoder - Decodes a GIF file into one or more frames. Example: GifDecoder d = new GifDecoder(); d.read("sample.gif"); int n = d.getFrameCount(); for (int i = 0; i < n; i++) { BufferedImage frame = d.getFrame(i); // frame i int t = d.getDelay(i); // display duration of frame in milliseconds // do something with frame } No copyright asserted on the source code of this class. May be used for any purpose, however, refer to the Unisys LZW patent for any additional restrictions. Please forward any corrections to kweiner@fmsware.com. author: Kevin Weiner, FM Software; LZW decoder adapted from John author: Cristy's ImageMagick. version: 1.03 November 2003

Inner Class :static class GifFrame

Field Summary
final protected static int	MaxStackSize
final public static int	STATUS_FORMAT_ERROR
final public static int	STATUS_OK File read status: No errors.
final public static int	STATUS_OPEN_ERROR File read status: Unable to open source.
protected int[]	act
protected int	bgColor
protected int	bgIndex
protected byte[]	block
protected int	blockSize
protected int	delay
protected int	dispose
protected int	frameCount
protected ArrayList	frames
protected int[]	gct
protected boolean	gctFlag
protected int	gctSize
protected int	height
protected BufferedImage	image
protected BufferedInputStream	in
protected boolean	interlace
protected int	ixiyiwih
protected int	lastBgColor
protected int	lastDispose
protected BufferedImage	lastImage
protected Rectangle	lastRect
protected int[]	lct
protected boolean	lctFlag
protected int	lctSize
protected int	loopCount
protected int	pixelAspect
protected byte[]	pixelStack
protected byte[]	pixels
protected short[]	prefix
protected int	status
protected byte[]	suffix
protected int	transIndex
protected boolean	transparency
protected int	width

Method Summary
protected void	decodeImageData() Decodes LZW image data into pixel array.
protected boolean	err()
public int	getDelay(int n) Gets display duration for specified frame.
public BufferedImage	getFrame(int n) Gets the image contents of frame n.
public int	getFrameCount() Gets the number of frames read from file.
public Dimension	getFrameSize() Gets image size.
public BufferedImage	getImage() Gets the first (or only) image read.
public int	getLoopCount() Gets the "Netscape" iteration count, if any.
protected void	init()
public int	read(BufferedInputStream is) Reads GIF image from stream Parameters: is - BufferedInputStreamcontaining GIF file.
public int	read(InputStream is) Reads GIF image from stream Parameters: is - InputStream containing GIF file.
public int	read(String name)
protected int	read() Reads a single byte from the input stream.
protected int	readBlock() Reads next variable length block from input.
protected int[]	readColorTable(int ncolors)
protected void	readContents() Main file parser.
protected void	readGraphicControlExt()
protected void	readHeader() Reads GIF file header information.
protected void	readImage()
protected void	readLSD()
protected void	readNetscapeExt()
protected int	readShort()
protected void	resetFrame() Resets frame state for reading next image.
protected void	setPixels() Creates new frame image from current data (and previous frames as specified by their disposition codes).
protected void	skip() Skips variable length blocks up to and including next zero length block.

Field Detail

MaxStackSize
final protected static int MaxStackSize(Code)

STATUS_FORMAT_ERROR
final public static int STATUS_FORMAT_ERROR(Code)
	File read status: Error decoding file (may be partially decoded)

STATUS_OK
final public static int STATUS_OK(Code)
	File read status: No errors.

STATUS_OPEN_ERROR
final public static int STATUS_OPEN_ERROR(Code)
	File read status: Unable to open source.

act
protected int[] act(Code)

bgColor
protected int bgColor(Code)

bgIndex
protected int bgIndex(Code)

block
protected byte[] block(Code)

blockSize
protected int blockSize(Code)

delay
protected int delay(Code)

dispose
protected int dispose(Code)

frameCount
protected int frameCount(Code)

frames
protected ArrayList frames(Code)

gct
protected int[] gct(Code)

gctFlag
protected boolean gctFlag(Code)

gctSize
protected int gctSize(Code)

height
protected int height(Code)

image
protected BufferedImage image(Code)

in
protected BufferedInputStream in(Code)

interlace
protected boolean interlace(Code)

ixiyiwih
protected int ixiyiwih(Code)

lastBgColor
protected int lastBgColor(Code)

lastDispose
protected int lastDispose(Code)

lastImage
protected BufferedImage lastImage(Code)

lastRect
protected Rectangle lastRect(Code)

lct
protected int[] lct(Code)

lctFlag
protected boolean lctFlag(Code)

lctSize
protected int lctSize(Code)

loopCount
protected int loopCount(Code)

pixelAspect
protected int pixelAspect(Code)

pixelStack
protected byte[] pixelStack(Code)

pixels
protected byte[] pixels(Code)

prefix
protected short[] prefix(Code)

status
protected int status(Code)

suffix
protected byte[] suffix(Code)

transIndex
protected int transIndex(Code)

transparency
protected boolean transparency(Code)

width
protected int width(Code)

Method Detail

decodeImageData
protected void decodeImageData()(Code)
	Decodes LZW image data into pixel array. Adapted from John Cristy's ImageMagick.

err
protected boolean err()(Code)
	Returns true if an error was encountered during reading/decoding

getDelay
public int getDelay(int n)(Code)
	Gets display duration for specified frame. Parameters: n - int index of frame delay in milliseconds

getFrame
public BufferedImage getFrame(int n)(Code)
	Gets the image contents of frame n. BufferedImage representation of frame, or null if n isinvalid.

getFrameCount
public int getFrameCount()(Code)
	Gets the number of frames read from file. frame count

getFrameSize
public Dimension getFrameSize()(Code)
	Gets image size. GIF image dimensions

getImage
public BufferedImage getImage()(Code)
	Gets the first (or only) image read. BufferedImage containing first frame, or null if none.

getLoopCount
public int getLoopCount()(Code)
	Gets the "Netscape" iteration count, if any. A count of 0 means repeat indefinitiely. iteration count if one was specified, else 1.

init
protected void init()(Code)
	Initializes or re-initializes reader

read
public int read(BufferedInputStream is)(Code)
	Reads GIF image from stream Parameters: is - BufferedInputStreamcontaining GIF file. read status code (0 = no errors)

read
public int read(InputStream is)(Code)
	Reads GIF image from stream Parameters: is - InputStream containing GIF file. read status code (0 = no errors)

read
public int read(String name)(Code)
	Reads GIF file from specified file/URL source (URL assumed if name contains ":/" or "file:") Parameters: name - String containing source read status code (0 = no errors)

read
protected int read()(Code)
	Reads a single byte from the input stream.

readBlock
protected int readBlock()(Code)
	Reads next variable length block from input. number of bytes stored in "buffer"

readColorTable
protected int[] readColorTable(int ncolors)(Code)
	Reads color table as 256 RGB integer values Parameters: ncolors - int number of colors to read int array containing 256 colors (packed ARGB with fullalpha)

readContents
protected void readContents()(Code)
	Main file parser. Reads GIF content blocks.

readGraphicControlExt
protected void readGraphicControlExt()(Code)
	Reads Graphics Control Extension values

readHeader
protected void readHeader()(Code)
	Reads GIF file header information.

readImage
protected void readImage()(Code)
	Reads next frame image

readLSD
protected void readLSD()(Code)
	Reads Logical Screen Descriptor

readNetscapeExt
protected void readNetscapeExt()(Code)
	Reads Netscape extenstion to obtain iteration count

readShort
protected int readShort()(Code)
	Reads next 16-bit value, LSB first

resetFrame
protected void resetFrame()(Code)
	Resets frame state for reading next image.

setPixels
protected void setPixels()(Code)
	Creates new frame image from current data (and previous frames as specified by their disposition codes).

skip
protected void skip()(Code)
	Skips variable length blocks up to and including next zero length block.

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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