GLException: Surface already unlocked

OpenGL Development JOGL Development
#1

i have my app running under mac os x. now we tried it on windows. here’s the exception:


net.java.games.jogl.GLException: Surface already unlocked
        at net.java.games.jogl.impl.windows.WindowsOnscreenGLContext.unlockSurfa
ce(WindowsOnscreenGLContext.java:192)
        at net.java.games.jogl.impl.windows.WindowsOnscreenGLContext.free(Window
sOnscreenGLContext.java:134)
        at net.java.games.jogl.impl.GLContext.invokeGL(GLContext.java:271)
        at net.java.games.jogl.GLCanvas.displayImpl(GLCanvas.java:194)
        at net.java.games.jogl.GLCanvas.display(GLCanvas.java:82)
        at net.xytanics.games.engine.Viewport.draw(Viewport.java:191)
        at net.xytanics.games.smsrace.Controller$TickTimerTask.run(Controller.ja
va:88)
        at java.util.TimerThread.mainLoop(Unknown Source)
        at java.util.TimerThread.run(Unknown Source)

the difference i see in the init() method is this:
mac: net.java.games.jogl.GLCanvas[canvas0,0,22,800x578]
win: net.java.games.jogl.GLCanvas[canvas0,4,23,792x573,invalid]

the ‘invalid’ looks really bad there. any idea, what i have to do to the canvas to make it valid?
here’s my construction:


            Frame frame = new Frame("Viewport Frame");
            DisplayMode bMode = aDevice.getDisplayMode();
            frame.setBounds((int) (bMode.getWidth() - bounds.size.width) >> 1, (int) (bMode.getHeight() - bounds.size.height) >> 1, (int) bounds.size.width, (int) bounds.size.height);
            GLCapabilities capabilities = new GLCapabilities();
            canvas = GLDrawableFactory.getFactory().createGLCanvas(capabilities);
            canvas.addGLEventListener(this);
            frame.add(canvas);
            frame.show();

do i have to add frame.setVisible(true) or something like it?

#2

This is a known problem. You’ve added the listener to the canvas before it is added to a window and the window has been made visible. I really don’t know why there is such a heavy order of operations problem with JOGL. To get the window to show up without exceptions, you need the following order:

Create Frame
Create Canvas
Add Canvas to frame
Show frame
Add listener(s)
Set user-control render thread.

#3

Does anyone have a small, self-contained example that illustrates this problem? If so, please file an issue on the JOGL web page and attach it…we can’t (easily) fix bugs that we can’t reproduce…

#4

Here is an example app that regularly fails. 379 lines is too long to post, so you can find it at Order.java

As I stated in another thread, this app does not fail with 1.1b04 (July 16) on this card. Backing up to 1.1b04 (July 2), I regularly have problems. However, I also noticed that the Microsoft driver is being selected, which may be the root of the problem.

I’ve placed comments around my two calls to frame.getContentPane().add(glCanvas, BorderLayout.CENTER);

#5

I’m sorry to report that on a ATI Radeon Mobility 9600, order is still completely dependent. With the above source and 1.1b04 (July 16), on entering fullscreen I receive the White Screen of Death. No output is written to stderr or stdout.

Issue #100 has been submitted for this.