Graphics.copyArea bug?

[lauwenmark]

Hello,

I have a problem when using copyArea to scroll an image with a negative dx value (that is, scroll an image to the left) with an opaque picture format.

Here is a simple test I performed in a JFrame:

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public class TestFrame extends javax.swing.JFrame {     private BufferedImage buffer = null;     /**      * Creates new form TestFrame      */     public TestFrame()     {         try         {             BufferedImage img = ImageIO.read(new File("/home/lauwenmark/tmp/test.jpg"));             this.buffer = new BufferedImage(1600, 1200, BufferedImage.TYPE_INT_RGB);             Graphics2D g2d = this.buffer.createGraphics();             g2d.drawImage(img, 0, 0, this);             g2d.dispose();         }         catch (IOException ex)         {             ex.printStackTrace();             this.buffer = new BufferedImage(1600, 1200, BufferedImage.TYPE_INT_RGB);         }     }     @Override     public void paint(Graphics g)     {         Graphics2D g2d = (Graphics2D)g;         super.paint(g);         g2d.drawImage(this.buffer, 0, 0, this);     }

And I scroll using this:

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Graphics2D g2d = buffer.createGraphics();         g2d.copyArea(64, 0, this.buffer.getWidth()-64, this.buffer.getHeight(), -64, 0);         g2d.dispose();         this.repaint();

When this.buffer is of TYPE_INT_ARGB, it works as expected. However, when using TYPE_INT_RGB, it doesn't and ends up corrupting the display like this:



Uploaded with ImageShack.us

Where am I doing it wrong? Or is it a bug in copyArea?

[gimbal]

Question has already gotten answers here:

https://forums.oracle.com/forums/thread.jspa?threadID=2334244