CEF Forum

Hello,
when I start my application with JCEF then I get the following stack trace:

Code: Select all

Exception in thread "AWT-EventQueue-0" com.jogamp.nativewindow.NativeWindowException: Unable to lock surface
   at jogamp.nativewindow.jawt.x11.X11JAWTWindow.lockSurfaceImpl(X11JAWTWindow.java:84)
   at com.jogamp.nativewindow.awt.JAWTWindow.lockSurface(JAWTWindow.java:677)
   at com.jogamp.opengl.awt.GLCanvas.createJAWTDrawableAndContext(GLCanvas.java:718)
   at com.jogamp.opengl.awt.GLCanvas.addNotify(GLCanvas.java:621)
   at org.cef.browser.CefBrowserOsr$1.addNotify(CefBrowserOsr.java:194)
   at java.awt.Container.addNotify(Container.java:2776)
   at javax.swing.JComponent.addNotify(JComponent.java:4740)
   at java.awt.Container.addNotify(Container.java:2776)
   at javax.swing.JComponent.addNotify(JComponent.java:4740)
   at java.awt.Container.addNotify(Container.java:2776)
   at javax.swing.JComponent.addNotify(JComponent.java:4740)
   at java.awt.Container.addNotify(Container.java:2776)
   at javax.swing.JComponent.addNotify(JComponent.java:4740)
   at javax.swing.JRootPane.addNotify(JRootPane.java:757)
   at java.awt.Container.addNotify(Container.java:2776)
   at java.awt.Window.addNotify(Window.java:770)
   at java.awt.Frame.addNotify(Frame.java:487)
   at java.awt.Window.pack(Window.java:807)
        [...]


I also tried to reproduce it with the JCEF test applications, but I couldn't reproduce it.

JCEFBeginner

Compare your code to the sample applications. Are you calling CefApp.startup?

I created a simple application with JCEF for test purposes:

Code: Select all

import org.cef.CefApp;
import org.cef.CefClient;
import org.cef.CefSettings;
import org.cef.browser.CefBrowser;

import javax.swing.*;
import java.awt.*;

class CefTest {
    public static void main(String[] args) {
        CefApp.startup(args);
        CefSettings settings = new CefSettings();
        settings.windowless_rendering_enabled = true;
        CefApp app = CefApp.getInstance(settings);
        CefClient client = app.createClient();
        CefBrowser browser = client.createBrowser("www.google.de", true, false);
        Component browserUI = browser.getUIComponent();

        JFrame frame = new JFrame();
        frame.add(browserUI);
        frame.setVisible(true);

    }
}


As soon as the frame is set to visible, the exception is thrown.
Another thing that is to say is that this problem only persists on Linux, not on Windows. (I don't know how it is on Mac)

I got my simple application from my last post to work, by putting the initialization of the JFrame before "CefApp.startup(args)".
But my other application is still not working.
EDIT: My application is now working. Thank you, for your answer