Crash when going full screen

[vafada]

I'm seeing a crash when going to full screen mode via F12.

Exception in thread "Thread-4" java.lang.IllegalStateException: Component must have a valid peer
	at java.desktop/java.awt.Component$FlipBufferStrategy.flip(Component.java:4171)
	at java.desktop/java.awt.Component$FlipBufferStrategy.show(Component.java:4298)
	at wolf3d.infra.GameCanvas$MainLoop.run(GameCanvas.java:118)
	at java.base/java.lang.Thread.run(Thread.java:1575)

and

Exception in thread "Thread-4" java.lang.IllegalStateException: Buffers have not been created
	at java.desktop/sun.awt.X11.XComponentPeer.getBackBuffer(XComponentPeer.java:1143)
	at java.desktop/java.awt.Component$FlipBufferStrategy.getBackBuffer(Component.java:4144)
	at java.desktop/java.awt.Component$FlipBufferStrategy.flip(Component.java:4164)
	at java.desktop/java.awt.Component$FlipBufferStrategy.show(Component.java:4298)
	at wolf3d.infra.GameCanvas$MainLoop.run(GameCanvas.java:118)
	at java.base/java.lang.Thread.run(Thread.java:1575)

You can easily reproduce this by spamming clicking on F12 if you don't see the issue the first time.

I believe the issue has something to do with threading.

the method to go to full screen disposes the window:

JavaWolf3DGameEngine/src/wolf3d/infra/Display.java

Lines 65 to 76 in 7fbad43

	public void setFullscreenMode() {
	dispose();
	setUndecorated(true);
	setVisible(true);
	//System.out.println("fullscreen supported: "
	// + gd.isFullScreenSupported());
	gd.setFullScreenWindow(this);
	gd.setDisplayMode(fullscreenDisplayMode);
	gameCanvas.updateAspectRatioDimension();
	gameCanvas.requestFocus();
	hideMouseCursor();
	}

but the main game loop is trying to access the buffer, these are the two places i see crashing:

JavaWolf3DGameEngine/src/wolf3d/infra/GameCanvas.java

Line 99 in 7fbad43

Graphics2D g = (Graphics2D) bs.getDrawGraphics();

JavaWolf3DGameEngine/src/wolf3d/infra/GameCanvas.java

Line 118 in 7fbad43

bs.show();