CODEWITHSUNDEEP
c++macosopenglglfwglew
Arc
Arc

Reputation: 103

glfwCreateWindow returns NULL on Mac OS

I'm doing my OpenGL homework on Xcode10.0 Mac OS 10.14 using glew2.1 and glfw3.2, but glfwCreateWindow always returns NULL. Here is the code:

#include <stdio.h>
#include <stdlib.h>
#include <GL/glew.h>
#include <GLFW/glfw3.h>
#include <iostream>

int main(int argc, const char * argv[]) {
    GLFWwindow* win;

    if(!glfwInit()){
        return -1;
    }

    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2);
    glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);

    win = glfwCreateWindow(640, 480, "test", NULL, NULL);

    if(!win)
    {
        glfwTerminate();
        exit(EXIT_FAILURE);
    }
    if(!glewInit())
    {
        return -1;
    }
    glfwMakeContextCurrent(win);
    while(!glfwWindowShouldClose(win)){
        glfwSwapBuffers(win);
        glfwPollEvents();
    }
    glfwTerminate();
    exit(EXIT_SUCCESS);
    return 0;
}

if I delete 4 glfwWindowHint sentences, a window will show up but it's dark,and Xcode console will throw an error:Setting as the first responder for window , but it is in a different window ((null))! This would eventually crash when the view is freed. The first responder will be set to nil.

Upvotes: 2

Views: 1954

Answers (1)

johnlapp
johnlapp

Reputation: 41

These two lines:

glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);

were causing the issue for me. Once I removed them, glfwCreateWindow() was no longer returning null.

Upvotes: 4

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