useful Java2D bridge

Martin, it would be useful to have you app as a testcase.  Java2D painting is amazingly convoluted and I've found it really hard to make sure swing components are being painted in glg2d and not in Java2D.

There's an effort to modularize the painting so it can be delegated properly. Marrio Torre (I believe with Roman Kennke) developed Caciocavallo http://ladybug-studio.com/caciocavallo/ and the idea is to make it easy to have one place to change the painting subsystem. I've been wanting to look at their code, maybe even leverage it.

But the short answer is that you might be right. So far, I've found no speedup when using swing repainting (my UIDemo class) and multiple levels of JComponents. I think the problem is a combination of too much logic in deciding what to paint and being expensive to fire an OpenGL display call when a little button just wants to repaint the border.

But if you ignore that and look at my GraphTest class (a single JPanel painting a lot of objects) glg2d wins easily. It's much more responsive when making a lot of Graphics2D calls on the same paint call.

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NAML

Hi,
Sorry for late reply. I have written a class that simply visits components in order to print the class name of component.getGraphics() (see end of this message).

I was surprised to see what follows, so I believe something might be wrong in my test:

GraphTest: sun.java2d.SunGraphics2D
 JRootPane: sun.java2d.SunGraphics2D
  JPanel: sun.java2d.SunGraphics2D
  JLayeredPane: sun.java2d.SunGraphics2D
   G2DGLPanel: sun.java2d.SunGraphics2D
    GLJPanel: sun.java2d.SunGraphics2D
    NO_CLASS_NAME: sun.java2d.SunGraphics2D

What I do is calling a diagnostic once the main frame is made visible:

public static void main(String[] args) throws Exception {
    JFrame test = new GraphTest();
    ...
    test.setVisible(true);
   
    GraphicsDiagnose gd = new GraphicsDiagnose();
    gd.printGraphics(test);
}

Am I wrong somewhere? Will the GLGraphics2D replace default SunGraphics2D latter?

Martin

--------------------------------------
public class GraphicsDiagnose {
    protected boolean shortName = false;
   
    public void printGraphics(Component c){
        printGraphics(c, 0);
    }
   
    protected void printGraphics(Component c, int depth){
        if(c==null)
            System.out.println(blanks(depth) + "component null");
        else{
            String className = c.getClass().getSimpleName();
            String me = blanks(depth) + ("".equals(className)?"NO_CLASS_NAME":className);
           
            if(c.getGraphics()!=null){
                if(shortName)
                    me += ": " + c.getGraphics().getClass().getSimpleName();
                else
                    me += ": " + c.getGraphics().getClass().getName();
            }
            else
                me += ": graphics is null at this point";
           
            System.out.println(me);
           
            if(c instanceof Container){
                Container ct = ((Container)c);
                for(Component child: ct.getComponents()){
                    printGraphics(child, depth+1);
                }
            }            
        }
    }
   
    protected String blanks(int length){
        String b = "";
        for (int i = 0; i < length; i++)
            b += " ";
        return b;
    }
}
 

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NAML