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graph
Class RotateTextFilter  

java.lang.Object
  java.awt.image.ImageFilter
      graph.RotateTextFilter

All Implemented Interfaces:

java.lang.Cloneable, java.awt.image.ImageConsumer

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class RotateTextFilter

extends java.awt.image.ImageFilter

This is an extension to the ImageFilter class that will rotate an image a multiple of 90 degrees. This filter is easily extended to allow arbitrary rotations

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Field Summary
private  int	angle
private  byte[]	bpixels
private  java.awt.image.ColorModel	colorModel
private  double	cos
private  int	height
private  int[]	ipixels
private  double	sin
private  int	width
private  int	xmax
private  int	xmin
private  int	ymax
private  int	ymin

 

Fields inherited from class java.awt.image.ImageFilter

consumer

 

Fields inherited from interface java.awt.image.ImageConsumer

COMPLETESCANLINES, IMAGEABORTED, IMAGEERROR, RANDOMPIXELORDER, SINGLEFRAME, SINGLEFRAMEDONE, SINGLEPASS, STATICIMAGEDONE, TOPDOWNLEFTRIGHT

 

Constructor Summary

RotateTextFilter(int angle)           Instantiate the class

 

Method Summary
void	imageComplete(int status)           Called when the image is complete.
void	setDimensions(int w, int h)           Find the dimensions of the original image and pass onto the image consumer the dimensions of the new roated image
void	setPixels(int x, int y, int w, int h, java.awt.image.ColorModel model, byte[] pixels, int off, int scan)           As the pixels of the original image are sent store them in memory as the rotated image.
void	setPixels(int x, int y, int w, int h, java.awt.image.ColorModel model, int[] pixels, int off, int scan)           As the pixels of the original image are sent store them in memory as the rotated image.
void	setProperties(java.util.Hashtable props)           Add to the properties table of the image that it has been rotated

 

Methods inherited from class java.awt.image.ImageFilter

clone, getFilterInstance, resendTopDownLeftRight, setColorModel, setHints

 

Methods inherited from class java.lang.Object

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

 

Field Detail

angle

private int angle

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xmin

private int xmin

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xmax

private int xmax

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ymin

private int ymin

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ymax

private int ymax

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width

private int width

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height

private int height

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cos

private double cos

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sin

private double sin

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ipixels

private int[] ipixels

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bpixels

private byte[] bpixels

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colorModel

private java.awt.image.ColorModel colorModel

Constructor Detail

RotateTextFilter

public RotateTextFilter(int angle)

Instantiate the class

Method Detail

setProperties

public void setProperties(java.util.Hashtable props)

Add to the properties table of the image that it has been rotated

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setDimensions

public void setDimensions(int w,
                          int h)

Find the dimensions of the original image and pass onto the image consumer the dimensions of the new roated image

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setPixels

public void setPixels(int x,
                      int y,
                      int w,
                      int h,
                      java.awt.image.ColorModel model,
                      byte[] pixels,
                      int off,
                      int scan)

As the pixels of the original image are sent store them in memory as the rotated image. This method is called with a subset rectangle of the original image.

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setPixels

public void setPixels(int x,
                      int y,
                      int w,
                      int h,
                      java.awt.image.ColorModel model,
                      int[] pixels,
                      int off,
                      int scan)

As the pixels of the original image are sent store them in memory as the rotated image. This method is called with a subset rectangle of the original image.

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imageComplete

public void imageComplete(int status)

Called when the image is complete. When this is called by the image producer, we can then pass the rotated image onto the image consumer.

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