public BufferedImage transform(BufferedImage image){
System.out.println("Input width: "+ image.getWidth());
System.out.println("Input height: "+ image.getHeight());
AffineTransform affineTransform = new AffineTransform();
affineTransform.setToQuadrantRotation(1, image.getWidth() / 2, image.getHeight() / 2);
AffineTransformOp opRotated = new AffineTransformOp(affineTransform, AffineTransformOp.TYPE_BILINEAR);
BufferedImage transformedImage = opRotated.createCompatibleDestImage(image, image.getColorModel());
System.out.println("Resulting width: "+ transformedImage.getWidth());
System.out.println("Resulting height: "+ transformedImage.getHeight());
transformedImage = opRotated.filter(image, transformedImage);
return transformedImage;
}
import java.awt.geom.AffineTransform;
import java.awt.image.AffineTransformOp;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
public class RotateImage {
public static final String IMAGE_PATH = "http://duke.kenai.com/"
+ "models/Duke3DprogressionSmall.jpg";
public static void main(String[] args) {
try {
URL imageUrl = new URL(IMAGE_PATH);
BufferedImage img0 = ImageIO.read(imageUrl);
ImageIcon icon0 = new ImageIcon(img0);
int numquadrants = 1;
BufferedImage img1 = transform(img0, numquadrants );
ImageIcon icon1 = new ImageIcon(img1);
JOptionPane.showMessageDialog(null, new JLabel(icon0));
JOptionPane.showMessageDialog(null, new JLabel(icon1));
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
public static BufferedImage transform(BufferedImage image, int numquadrants) {
int w0 = image.getWidth();
int h0 = image.getHeight();
int w1 = w0;
int h1 = h0;
int centerX = w0 / 2;
int centerY = h0 / 2;
if (numquadrants % 2 == 1) {
w1 = h0;
h1 = w0;
}
if (numquadrants % 4 == 1) {
if (w0 > h0) {
centerX = h0 / 2;
centerY = h0 / 2;
} else if (h0 > w0) {
centerX = w0 / 2;
centerY = w0 / 2;
}
// if h0 == w0, then use default
} else if (numquadrants % 4 == 3) {
if (w0 > h0) {
centerX = w0 / 2;
centerY = w0 / 2;
} else if (h0 > w0) {
centerX = h0 / 2;
centerY = h0 / 2;
}
// if h0 == w0, then use default
}
AffineTransform affineTransform = new AffineTransform();
affineTransform.setToQuadrantRotation(numquadrants, centerX, centerY);
AffineTransformOp opRotated = new AffineTransformOp(affineTransform,
AffineTransformOp.TYPE_BILINEAR);
BufferedImage transformedImage = new BufferedImage(w1, h1,
image.getType());
transformedImage = opRotated.filter(image, transformedImage);
return transformedImage;
}
}
public static BufferedImage rotateImage(BufferedImage image, int quadrants) {
int w0 = image.getWidth();
int h0 = image.getHeight();
int w1 = w0;
int h1 = h0;
int centerX = w0 / 2;
int centerY = h0 / 2;
if (quadrants % 2 == 1) {
w1 = h0;
h1 = w0;
}
if (quadrants % 4 == 1) {
centerX = h0 / 2;
centerY = h0 / 2;
} else if (quadrants % 4 == 3) {
centerX = w0 / 2;
centerY = w0 / 2;
}
AffineTransform affineTransform = new AffineTransform();
affineTransform.setToQuadrantRotation(quadrants, centerX, centerY);
AffineTransformOp opRotated = new AffineTransformOp(affineTransform,
AffineTransformOp.TYPE_BILINEAR);
BufferedImage transformedImage = new BufferedImage(w1, h1,
image.getType());
transformedImage = opRotated.filter(image, transformedImage);
return transformedImage;
}