Java 使用AffineTransform旋转动画GIF(图像图标)
我正在尝试使用仿射变换旋转存储在ImageIcon中的动画gif。结果是无法绘制图像 这是我的密码:Java 使用AffineTransform旋转动画GIF(图像图标),java,animated-gif,image-rotation,affinetransform,Java,Animated Gif,Image Rotation,Affinetransform,我正在尝试使用仿射变换旋转存储在ImageIcon中的动画gif。结果是无法绘制图像 这是我的密码: AffineTransform trans = AffineTransform.getRotateInstance(imgYaw, img.getImage().getWidth(null) / 2, img.getImage().getHeight(null) / 2); AffineTransformOp transo = new AffineTransformOp(trans, Affin
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);
与其说是一个答案,不如说是一个简化工作流程的例子 基本上,它所做的是将一个
仿射变换
直接应用于图形
上下文,并将图像
绘制到上下文中
现在,您可以使用buffereImage
中的Graphics
上下文,如果您需要的话
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();
}
}
}
为什么不直接将图像绘制到
图形
上下文,实际上,为什么不将转换应用到图形
上下文?对于@MadProgrammer,因为如果我这样做,图像将不会动画化。@MadProgrammer,如果您的意思是将paintIcon替换为g.drawImage(transO.filter(bufferedimg,null),x-(img.getImage().getWidth(null)/2),y-(img.getImage().getWidth(null)/2),null)代码>,然后图像甚至没有被画出来。我正式是个白痴。我忘了在BuffereImage上绘制图像。我有一种有趣的感觉,认为有一种方法可以做到……但我可能在考虑其他事情……我修复了它(请参阅我的评论),但我还是会给你答案。@user3697209是的,这只是一种不同方法的演示;)