Rotating Images

[Errant]

I'm trying to find a way to rotate an [tt]Image[/tt]. The image is stored as either a .gif or .jpg file, and initially loaded as an [tt]ImageIcon[/tt]. I only need it to be rotated in 90° incriments. I'm looking for a nice, simple way to do this, although as I'm having trouble finding anything at all, anything that works will do.

 

[Targol]

A doable but complicated way is following in 3 steps :
1) Convert your image into a 2 dimensional bytes array
2) Copy the array in another one changing order for one of the array dimensions.
3) Convert again the copied array into an image.

Hope that helps.

Water is not bad as long as it stays out human body ;-)

 

[timw]

Maybe the JAI can do it.

Have a look at

http://java.sun.com/products/java-media/jai/

Tim

 

[prosper]

//copy from my post
// positive value or negative value will determine to rotate 90 degrees clockwisely or counter-clockwisely.
// g2.rotate(Math.PI*0.25,250.0,250.0);
// g2.rotate(Math.PI*(-0.25),250.0,250.0);

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.geom.AffineTransform;
import java.awt.Graphics2D;
import java.awt.geom.*;
import java.util.*;
class WholeFrame3 extends JFrame implements ActionListener
{
CenterCanvas3 cc;
JButton jb,jb2;
JPanel ccPanel,jbPanel;
double dividedBy = 36.0;
public WholeFrame3()
{
//getContentPane().setBackground(Color.green);
getContentPane().setLayout(null);
ccPanel = new JPanel();
ccPanel.setBounds(0,0,500,500);
cc = new CenterCanvas3();
cc.setBounds(0,0,500,500);
getContentPane().add(ccPanel);
ccPanel.add(cc);

jbPanel = new JPanel();
jbPanel.setBackground(Color.blue);
jbPanel.setBounds(0,600,500,100);
getContentPane().add(jbPanel);

jb = new JButton("click");
jb.addActionListener(this);
jbPanel.add(jb);
}
public static void main(String args[])
{
WholeFrame3 wf = new WholeFrame3();
wf.setSize(600,700);
wf.setVisible(true);
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==jb)
{
dividedBy-=1.0;

cc.setRadian(Math.PI*dividedBy/36.0);
}
}
}

class CenterCanvas3 extends Canvas
{

double rad = Math.PI*36.0/36.0;
public void setRadian(double tempRad)
{
rad = tempRad;
repaint();
}
public double getRadian()
{
System.out.println(rad);
return rad;
}
public void update()
{}

public void paint(Graphics g)
{
Graphics2D g2 = (Graphics2D)g;
setBackground(Color.green);
//Update transform to provide rotation and display,
// the transform values.
g2.rotate(getRadian(),250.0,250.0);
g2.setColor(Color.black);
g2.drawRect(120, 120, 20, 200);
g2.drawString ("Material", 30, 220);
g2.drawString ("Ratings", 30, 240);
g2.drawString ("+5", 102, 130);
g2.drawString ("0", 107, 220);
g2.drawString ("-5", 102, 315);
}
}