GLFW window opening extremely slow?

[WIld Sage]

Okay, so I'm trying to start a project using GLFW. But every time I open a window, it at first appears to have frozen (white window, "waiting" cursor, wont accept any input whatsoever), but after about 30-60 seconds it creates the window that it's supposed to. I've tried this with 3 or 4 different programs and the result is always the same. Am I setting up my project wrong or something?

I'm using Visual Studio 2010 Ultimate. Here's my source code:

#define GLEW_STATIC
 
#include "GL/glew.h"
#include "GL/wglew.h"
#include "GL/glfw.h"
 
#include <stdio.h>
 
#pragma comment (lib, "glfw.lib")
#pragma comment (lib, "opengl32.lib")
#pragma comment (lib, "glu32.lib")
 
int main(int argc, char** args)
{
	bool running = true;
	glfwInit();
	glewInit();
	glfwOpenWindow(640, 480, 8, 8, 8, 8, 24, 0, GLFW_WINDOW);
	glClearColor(0.5, 0.5, 1.0, 1.0);
	while (running)
	{
		 /////////////////////
		// Begin Main Loop //
		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
		glfwSwapBuffers();
 
		running = !glfwGetKey(GLFW_KEY_ESC) &amp;&amp; glfwGetWindowParam(GLFW_OPENED);
	}
 
	glfwTerminate();
	return 0;
}

It's not the cleanest code, but like I said I've tried a few different simple programs and the result is the same - a 30 second - minute long delay until the window opens.

[Stuart McDonald]

I'm using GLFW on Windows 7 with ATI card compiling with minGW and I've not seen this, but I did have a problem with fullscreen taking over a minute to start up. A couple of driver updates later and the problem disappeared. Does fullscreen take the same time?

So all I can suggest is check you've got the latest drivers. Only other thing that stands out is glewInit. I've not used that so don't know if it could be an issue.

You could also try using freeGlut to see what it does.

[WIld Sage]

I've tried commenting out all glew-related code, but nothing changes. I don't want to use glut because it doesn't support the features I want - GLFW does everything I need it to (except disabling the windows DWM, but that's only one thing, and I can code that in myself).

I'm using an NVidia card on windows 7, and I have the latest driver version (280.26). Fullscreen gives the same delay.

[Alfonse Reinheart]

Do you know what the exact function is that's getting the slowdown? Can you step through your main function and see which function is taking a long time?

Also, is this a release build?

[WIld Sage]

The function that's taking forever is glwOpenWindow(). I tried release, debug, and even a build I compiled myself, same result.

[ZbuffeR]

And when you break the debug build in the middle the 60 seconds, can you see where inside glwOpenWindow() you fall into ?

BTW, can you describe your hardware setup, os version, driver version ?

[Stuart McDonald]

I don't want to use glut because it doesn't support the features I want

The point was to see if this is something specific to GLFW.

You could build a debug version with a static GLFW and step through it's code to see exactly what's going on. Also, you could use gDEBugger (now free) and break on every openGL call to see which one is taking the time (http://www.gremedy.com/).

[WIld Sage]

Okay, I tried opening a glut window with similar problems. Rather than displaying a frozen window, however, glut simply takes it's minute before it opens any window.

[Alfonse Reinheart]

So, did you debug into the library? Where was it stalled?

[WIld Sage]

Couldn't figure out how ._.