CODEWITHSUNDEEP
c++openglglfw
Mipzhap
Mipzhap

Reputation: 45

Simple GLFW freezes (thinks like crazy, not stopping)

I've created a very simple implementation of a GLFW window. My implementation looks like so

// Include standard headers
#include <stdio.h>
#include <stdlib.h>

// Include glfw for window handling
#include <GLFW/glfw3.h>

int SCREEN_WIDTH = 1280;
int SCREEN_HEIGHT = 720;

GLFWwindow* window;

int main() {

    if(!glfwInit()) {
        fprintf( stderr, "Failed to initialize GLFW!\n" );
        return -1;
    }

    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_COMPAT_PROFILE);


    window = glfwCreateWindow(SCREEN_WIDTH, SCREEN_HEIGHT, "Title", NULL, NULL);
    if( !window )
    {
        fprintf( stderr, "Failed to create window!\n" );
        glfwTerminate();
        return -1;
    }

    glClearColor(0.0f, 0.0f, 1.0f, 0.0f);

    do {
        glfwSwapBuffers(window);

    } while(!glfwGetKey(window, GLFW_KEY_ESCAPE));

    glfwTerminate();
    return 0;
}

It compiles fine, but when I run the application it just "freezes", not showing the correct clear color or anything. It just thinks like crazy (that "thinking"-cursor icon in Windows 7 spins and never stops). I'm wondering why it freezes like such, does anyone have an idea?

EDIT:
Found the solution to my problem. I was learning from a GLFW2 example, but having the newest version (GLFW3) required me to redo the code some; the thing I didn't realize was that the glSwapBuffers(window) call doens't call glfwPollEvents() by itself, giving me the problem I had.

Upvotes: 0

Views: 2652

Answers (1)

paddy
paddy

Reputation: 63471

  1. You're not clearing the buffers, hence the clear colour is not showing through.

  2. You're not adding any kind of delay, so you're swapping empty buffers flat out ("thinking like crazy").

Upvotes: 1

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