使用AffineTransform旋轉動畫GIF（ImageIcon）

Question

我想使用AffineTransform旋轉存儲在ImageIcon中的動畫gif。結果是圖像沒有被繪製。

這裏是我的代碼：

AffineTransform trans = AffineTransform.getRotateInstance(imgYaw, img.getImage().getWidth(null)/2, img.getImage().getHeight(null)/2); 
AffineTransformOp transo = new AffineTransformOp(trans, AffineTransformOp.TYPE_BILINEAR); 
BufferedImage bufferedimg = new BufferedImage(img.getImage().getWidth(null), img.getImage().getHeight(null), BufferedImage.TYPE_4BYTE_ABGR); 
img.setImage(atransO.filter(bufferedimg, null)); 
img.paintIcon(null, g, x, y); 

Answer 1

與其說是一個答案，但簡化工作流程的例子...

基本上，這樣做是直接施加AffineTransform到Graphics背景和油漆在IconImage它...

現在，你可以使用來自BufferedImage的Graphics背景下，如果這就是你所需要的...

import java.awt.Dimension; 
import java.awt.EventQueue; 
import java.awt.Graphics; 
import java.awt.Graphics2D; 
import java.awt.GridLayout; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.awt.geom.AffineTransform; 
import javax.swing.ImageIcon; 
import javax.swing.JFrame; 
import javax.swing.JLabel; 
import javax.swing.JPanel; 
import javax.swing.Timer; 
import javax.swing.UIManager; 
import javax.swing.UnsupportedLookAndFeelException; 

public class TestImage { 

    public static void main(String[] args) { 
     new TestImage(); 
    } 

    public static final String IMAGE_PATH = "C:\\Users\\shane\\Dropbox\\Ponies\\28490 - animated gif rainbow_dash_Small.gif"; 

    public TestImage() { 
     EventQueue.invokeLater(new Runnable() { 
      @Override 
      public void run() { 
       try { 
        UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); 
       } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) { 
        ex.printStackTrace(); 
       } 

       JFrame frame = new JFrame("Testing"); 
       frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
       frame.setLayout(new GridLayout(1, 2)); 
       frame.add(new JLabel(new ImageIcon(IMAGE_PATH))); 
       frame.add(new TestPane()); 
       frame.pack(); 
       frame.setLocationRelativeTo(null); 
       frame.setVisible(true); 
      } 
     }); 
    } 

    public class TestPane extends JPanel { 

     private ImageIcon img; 
     private float degrees; 

     public TestPane() { 

      img = new ImageIcon(IMAGE_PATH); 
      Timer timer = new Timer(16, new ActionListener() { 
       @Override 
       public void actionPerformed(ActionEvent e) { 
        degrees += 1; 
        repaint(); 
       } 
      }); 
      timer.start(); 

     } 

     @Override 
     public Dimension getPreferredSize() { 
      return new Dimension(img.getIconWidth(), img.getIconHeight()); 
     } 

     @Override 
     protected void paintComponent(Graphics g) { 
      super.paintComponent(g); 
      Graphics2D g2d = (Graphics2D) g.create(); 
      int x = getWidth()/2; 
      int y = getHeight()/2; 
      g2d.setTransform(AffineTransform.getRotateInstance(Math.toRadians(degrees), x, y)); 
      x = (getWidth() - img.getIconWidth())/2; 
      y = (getHeight() - img.getIconHeight())/2; 
      img.paintIcon(this, g2d, x, y); 
      g2d.dispose(); 
     } 

    } 

}