[Solved] [LWJGL] [GLFW] ImageIO.read stalling and glitching with GLFW use

Newbie & Debugging Questions
#1

I have been making a lwjgl object-oriented wrapper just for fun and have hit a bit of a snag.

To test setting the cursor i have been trying to load a cursor image, but it isn’t working.

When i try to load the image after creating my window, it stalls on ImageIO.read.

When i try to load the image before creating my window, it glitches and doesn’t let me focus on the window. One thing i have noticed is that the application doesn’t show up in my open applications bar (don’t know the name, i’m on a mac) when i do this, but eclipse still shows it as running.

When i try to load the image in another thread started before i create the window it does the same as the first time, it stalls and never loads. The window is also never created.

When i try to load the image in another thread started after i create the window it does the same thing as the first time, it stalls and never loads.

It seems like using

new Thread() {...}.start()

Isn’t actually starting a new thread.

There are no errors, i do have a GLFWErrorCallback set up, and i do know that is working, but it is not throwing any errors either.

Here is my code to load the image:

new Thread() {
			public void run() {
				try {
					System.out.println("Testing... Testing...");
					
					System.out.println("1");
					URL url = new URL("http://orig13.deviantart.net/410c/f/2012/010/a/4/sniper_cross_hairs_cursor_by_parodyskillz-d4lxmpf.png");
					
					System.out.println("2");
					ImageIO.read(url);
					
					System.out.println("3");
					System.out.println("success");
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}.start();

Do note, this does work when i run this code in a fresh project with nothing in it.

My other code is too large to post here, so i will post what i think is relevant.

on startup:

if(glfwInit() != GL_TRUE) {
			Error.fatal("Error initalizing GLFW", this);
		}
		
		Error.registerGLFWErrorCallback();
		Monitor.registerMonitorCallback();
		
		ShutdownHandler.addDisposable("Game", this);
		
		window = Window.create(640, 400, "Cool Window", null, null, null);
		
		window.getCreationHints().setResizable(true);
		
		window.init();
		
		start();

window.init()

if(exists()) {
			throw new UnsupportedOperationException("Window is already initialized");
		}
		
		creationHints.apply();
		
		windowId = glfwCreateWindow(creationWidth, creationHeight, title, creationMonitor.getId(), share.getId());
		
		if(windowId == NULL) {
			Error.fatal("Error creating window", this);
		}
		
		add(this);
		
		makeCurrent();
		glfwSwapInterval(1);
		
		this.keyInput = new KeyInput(this);
		this.mouseInput = new MouseInput(this);
		this.windowInput = new WindowInput(this);

I am using the VM Argument -XstartOnFirstThread.

I would really appreciate if someone could help me figure this out, it is extremely frustrating.