org.foray.graphic
Class GIFGraphic

java.lang.Object
  org.foray.graphic.Graphic4a
      org.foray.graphic.GIFGraphic

All Implemented Interfaces:

org.axsl.graphic.Graphic

public class GIFGraphic
extends Graphic4a

Implementation of AbstractGraphic for GIF images, using Java native classes.

Author:

Eric SCHAEFFER, Modified by Eric Dalquist - 9/14/2001 - ebdalqui@mtu.edu

See Also:

Graphic4a

Nested Class Summary

Nested classes/interfaces inherited from interface org.axsl.graphic.Graphic

org.axsl.graphic.Graphic.Compression, org.axsl.graphic.Graphic.Type

Field Summary

static int

GIF_BASICS_LENGTH The number of bytes that need to be read to get the basic information for a GIF file.

Fields inherited from class org.foray.graphic.Graphic4a

BIT_DEPTH_4, BIT_DEPTH_COLOR, BIT_DEPTH_GRAYSCALE, BIT_DEPTH_MONOCHROME

Constructor Summary

GIFGraphic(GraphicServer4a server, URL url, BufferedInputStream bis)
Constructor.

Method Summary

int	absoluteHeightReal() Returns the absolute height, in millipoints, of the graphic.
int	absoluteWidthReal() Returns the absolute width, in millipoints, of the graphic.
ColorSpace	getColorSpace()
org.axsl.graphic.Graphic.Compression	getCompressionType()
org.axsl.graphic.Graphic.Type	getGraphicType()
String	getMimeType()
String	getName()
byte[]	getRawSamples()
Color	getTransparentColor()
boolean	isInverted()
boolean	isTransparent()
void	loadImage() Load image data and initialize its properties.
void	parseBasics() This abstract method is implemented in subclasses to initiate parsing of enough of the image for it to be used in layout.
int	pixelHeight()
int	pixelWidth()

Methods inherited from class org.foray.graphic.Graphic4a

absoluteHeight, absoluteWidth, canMakeGraphicOutput, close, getBitDepth, getBitsPerComponent, getContent, getContentSize, getGraphicOutput, getInputStream, getLinks, getLogger, getRawColorSpace, getServer, getUrl, isImageLoaded, isValid, loadImageWrapper, maxBytesToParseBasics, parseBasicsWrapper, setBasicsParsed, setBitDepth, setContent, setImageLoaded, setInputStream, setLinks, setValid

Methods inherited from class java.lang.Object

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

Field Detail

GIF_BASICS_LENGTH

public static final int GIF_BASICS_LENGTH

The number of bytes that need to be read to get the basic information for a GIF file.

See Also:

Constant Field Values

Constructor Detail

GIFGraphic

public GIFGraphic(GraphicServer4a server,
                  URL url,
                  BufferedInputStream bis)

Constructor.

Parameters:

server - The parent graphic server.

url - The URL which contains the graphic content.

bis - The reusable input stream containing the bytes from url.

Method Detail

loadImage

public void loadImage()
               throws org.axsl.graphic.GraphicException

Description copied from class: Graphic4a

Load image data and initialize its properties. Subclasses need to implement this method.

Specified by:

loadImage in class Graphic4a

Throws:

org.axsl.graphic.GraphicException - an error occured during loading

getGraphicType

public org.axsl.graphic.Graphic.Type getGraphicType()

getCompressionType

public org.axsl.graphic.Graphic.Compression getCompressionType()

getMimeType

public String getMimeType()

parseBasics

public void parseBasics()
                 throws IOException

Description copied from class: Graphic4a

This abstract method is implemented in subclasses to initiate parsing of enough of the image for it to be used in layout. This method is responsible to:

1. store the image's intrinsic width in Graphic.pixelWidth()
2. store the image's intrinsic height in Graphic.pixelHeight()

The housekeeping work related to resetting the buffer, handling IOExceptions, and managing whether this method should be run are handled elsewhere. In short, this method does not need to address the details handled there.

Specified by:

parseBasics in class Graphic4a

Throws:

IOException - For IO errors during reading of the file.

getName

public String getName()

getRawSamples

public byte[] getRawSamples()
                     throws org.axsl.graphic.GraphicException

Throws:

org.axsl.graphic.GraphicException

absoluteWidthReal

public int absoluteWidthReal()
                      throws org.axsl.graphic.GraphicException

Description copied from class: Graphic4a

Returns the absolute width, in millipoints, of the graphic.

Specified by:

absoluteWidthReal in class Graphic4a

Returns:

The absolute width, in millipoints, of this graphic, if known. If not known, returns -1.

Throws:

org.axsl.graphic.GraphicException - For errors during reading of image file.

absoluteHeightReal

public int absoluteHeightReal()
                       throws org.axsl.graphic.GraphicException

Description copied from class: Graphic4a

Returns the absolute height, in millipoints, of the graphic.

Specified by:

absoluteHeightReal in class Graphic4a

Returns:

The absolute height, in millipoints, of this graphic, if known. If not known, returns -1.

Throws:

org.axsl.graphic.GraphicException - For errors during reading of image file.

isInverted

public boolean isInverted()

getColorSpace

public ColorSpace getColorSpace()
                         throws org.axsl.graphic.GraphicException

Throws:

org.axsl.graphic.GraphicException

isTransparent

public boolean isTransparent()
                      throws org.axsl.graphic.GraphicException

Throws:

org.axsl.graphic.GraphicException

getTransparentColor

public Color getTransparentColor()
                          throws org.axsl.graphic.GraphicException

Throws:

org.axsl.graphic.GraphicException

pixelWidth

public int pixelWidth()
               throws org.axsl.graphic.GraphicException

Throws:

org.axsl.graphic.GraphicException

pixelHeight

public int pixelHeight()
                throws org.axsl.graphic.GraphicException

Throws:

org.axsl.graphic.GraphicException