Rotate Operator leaves black color around destination image

Hi,

It works perfect.. i am doing the same thing using rotate operator in JAI... why that is not working... I am pasting both Rotate programs here.. One is in Java2D and 2nd in JAI.. Java2D is working but JAI rotate is leaving black area after rotation.

Please tell where i am wrong in JAI or is it bug in JAI?

Program in JAI

import java.io.*;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.event.*;

import javax.swing.border.*;

import java.net.URL;

import java.net.MalformedURLException;

import java.awt.*;

import java.awt.color.*;

import java.awt.geom.*;

import java.awt.image.*;

import java.awt.image.renderable.*;

import java.util.*;

import javax.media.jai.*;

import javax.media.jai.operator.*;

import javax.media.jai.widget.*;

import com.sun.media.jai.codec.*;

public class RotateTestJAI extends JPanel

{

PlanarImage src1 = null;

PlanarImage src2 = null;

ImageDisplay ic1 = null;

public static void main(String any[]) throws Exception{

JFrame frame = new JFrame();

frame.add(new RotateTestJAI(any[0],any[1]));

frame.setSize(800,600);

frame.setVisible(true);

}

public RotateTestJAI(String im1, String im2) throws Exception{

super(true);

setLayout(new BorderLayout());

try

{

//scale first image

FileSeekableStream stream = new FileSeekableStream(im1);

RenderedOp imscaled = JAI.create("stream",stream);

Interpolation interp = Interpolation.getInstance(Interpolation.INTERP_BILINEAR);

System.out.println("height : "+imscaled.getHeight()+" Width : "+imscaled.getWidth());

ParameterBlock params = new ParameterBlock();

params.addSource(imscaled);

params.add((float)1388/imscaled.getWidth());

params.add((float)1641/imscaled.getHeight());

params.add(0.00F);

params.add(0.00F);

params.add(interp);

src1 = JAI.create("scale", params );

//scale second image

stream = new FileSeekableStream(im2);

imscaled = JAI.create("stream",stream);

interp = Interpolation.getInstance(Interpolation.INTERP_BILINEAR);

params = new ParameterBlock();

params.addSource(imscaled);

params.add((float)400/imscaled.getWidth());

params.add((float)300/imscaled.getHeight());

params.add(0.00F);

params.add(0.00F);

params.add(interp);

src2 = JAI.create("scale", params );

float x = (float)(src1.getHeight()/2)-src2.getHeight();

float y = (float)(src1.getWidth()/2)-src2.getWidth();

int value = 10;

float angle = (float)(value * (Math.PI/180.0F));

//Rotate second image

params = new ParameterBlock();

params.addSource(src2); // The source image

params.add(x); // The x origin

params.add(y); // The y origin

params.add(angle); // The rotation angle

params.add(Interpolation.getInstance(Interpolation.INTERP_BILINEAR)); // The interpolation

// Create the rotate operation

src2 = JAI.create("Rotate", params, null);

//translate 2nd image to bring it in center

params = new ParameterBlock();

params.addSource(src2); // The source image

params.add((float)Math.max(x, 0)); // The x translation

params.add((float)Math.max(y, 0)); // The y translation

params.add(Interpolation.getInstance(Interpolation.INTERP_BILINEAR)); // The interpolation

// Create the translate operation

src2 = JAI.create("translate", params, null);

//overlay second image on first image

params = new ParameterBlock();

params.addSource(src1);

params.addSource(src2);

RenderedOp tmp = JAI.create("overlay", params);

//put the image on display

ic1=new ImageDisplay(tmp);

this.add(ic1,BorderLayout.CENTER);

}

catch ( MalformedURLException e)

{

return;

}

}

}

Program in Java2D:

import java.awt.*;

import java.awt.event.*;

import java.awt.geom.AffineTransform;

import java.awt.image.BufferedImage;

import java.io.IOException;

import javax.imageio.ImageIO;

import javax.swing.*;

public class RotationTest implements ActionListener

{

BufferedImage bg;

BufferedImage fg;

JLabel label;

double theta;

double thetaInc;

public RotationTest(BufferedImage bg, BufferedImage fg)

{

this.bg = bg;

this.fg = fg;

theta = 0.0;

thetaInc = Math.PI/6;

}

public void actionPerformed(ActionEvent e)

{

theta += thetaInc;

label.setIcon(new ImageIcon(getImage()));

}

private BufferedImage getImage()

{

int w = bg.getWidth();

int h = bg.getHeight();

BufferedImage out = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);

Graphics2D g2 = out.createGraphics();

g2.drawRenderedImage(bg, null);

double width = fg.getWidth();

double height = fg.getHeight();

double x = (w - width)/2;

double y = (h - height)/2;

AffineTransform at = AffineTransform.getTranslateInstance(x, y);

at.rotate(theta, width/2, height/2);

g2.drawRenderedImage(fg, at);

g2.dispose();

return out;

}

private JLabel getLabel()

{

ImageIcon icon = new ImageIcon(getImage());

label = new JLabel(icon);

label.setHorizontalAlignment(JLabel.CENTER);

return label;

}

private JPanel getUIPanel()

{

JButton rotate = new JButton("rotate");

rotate.addActionListener(this);

JPanel panel = new JPanel();

panel.add(rotate);

return panel;

}

public static void main(String[] args) throws IOException

{

ClassLoader cl = RotationTest.class.getClassLoader();

String path = "images/cougar.jpg";

BufferedImage one = ImageIO.read(cl.getResourceAsStream(path));

path = "images/Bird.gif";

BufferedImage two = ImageIO.read(cl.getResourceAsStream(path));

RotationTest test = new RotationTest(one, two);

JFrame f = new JFrame();

f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

f.getContentPane().add(test.getLabel());

f.getContentPane().add(test.getUIPanel(), "South");

f.setSize(400,400);

f.setLocation(200,200);

f.setVisible(true);

}

}

gkujja at 2007-7-13 3:35:32 >