Laboratoire ICAR » Plateforme TXM

I confirm this bug using Oracle JDK 1.8.0_25-b17.

As said by an Eclipse developer, this bug won't be fixed in Eclipse 4.5: https://bugs.eclipse.org/bugs/show_bug.cgi?id=418245
(Pity for us because we are stuck in Java 1.6)

After further investigation, the bug may be linked to the graphics acceleration that doesn't seem to be activated with the JDKs I tested (Sun Java 1.8.0_25 and openjdk 1.7.0-u60-unofficial).

When launching this simple test case from Eclipse which does NOT containing any SWT code at all with Java > 1.6:

import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Panel;
import java.awt.Rectangle;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class TestAWTOnly2 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub

         Frame frame = new Frame("test");
         frame.setSize(800,600);

         frame.addWindowListener(new WindowAdapter() {
             public void windowClosing(WindowEvent windowEvent){
                System.exit(0);
             }        
          });    

         java.awt.Panel panel = new java.awt.Panel(new java.awt.BorderLayout());

            Panel chartPanel = new Panel()    {
                 public void paint( Graphics g ) {
                        g.setColor( getBackground() );
                        g.fillRect( 20, 50, getSize().width, getSize().height );
                        g.setColor( getForeground() );
                        Rectangle border = new Rectangle( 100, 20, 14, 50 );
                        g.drawRect( border.x, border.y, border.width, border.height );
                    }
            };

            panel.add(chartPanel); 

        frame.add(panel);

        frame.setResizable(true);
        frame.setVisible(true);
    }

}

this message appears in Eclipse console:

WARNING: GL pipe is running in software mode (Renderer ID=0x1020400)

Then when resizing the AWT Frame created, the CPU usage increases a lot (reaching sometimes 70% of usage), maybe due of the software rendering.

This problem (maybe linked to an other problem related to the bridge) may be the cause of the bug leading to the non-drawing of the JFC and SVG AWT/Swing components. After some tests with TXM + Java 1.8, the CPU usage also increases a lot after trying to create a JFC chart and resizing the TXM windows. Using the old SVG Batik EditorPart, the behavior is a few different, CPU usage doesn't increase but the application hangs up.

NOTE: link to a basic SWT_AWT bridge snippet: http://git.eclipse.org/c/platform/eclipse.platform.swt.git/tree/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet135.java

Need to find if it's possible to enable hardware acceleration with Java 1.7/1.8 on Mac OS X. Also need to find the relation between the JRE and XQuartz. For example, Apple Java 1.6 can use hardware acceleration through XQuartz or through OpenGL. I guess the hardware acceleration enabling behavior in Java 1.7/1.8 is strongly linked to the MAC OS X version and the graphics hardware (e.g. embedded or not embedded GPU).