glfw_failure.rs

extern crate gl; // 0.6.1
extern crate glfw; // 0.9.1

use std::os::raw::c_void;

pub use glfw::Context;

fn main() {
  let mut glfw = glfw::init(glfw::FAIL_ON_ERRORS).unwrap();

  // OpenGL hint
  glfw.window_hint(glfw::WindowHint::OpenGlProfile(glfw::OpenGlProfileHint::Core));
  glfw.window_hint(glfw::WindowHint::ContextVersionMajor(3));
  glfw.window_hint(glfw::WindowHint::ContextVersionMinor(3));

  let (mut window, events) = glfw.create_window(800, 800, "GLFW failure", glfw::WindowMode::Windowed).expect("Failed to create GLFW window.");

  window.make_current();

  // init OpenGL
  gl::load_with(|s| window.get_proc_address(s) as *const c_void);

  while !window.should_close() {
    glfw.poll_events();

    for (_, _) in glfw::flush_messages(&events) {
    }
  
    unsafe {
      gl::ClearColor(0., 0., 0., 1.);
      gl::Clear(gl::COLOR_BUFFER_BIT | gl::DEPTH_BUFFER_BIT);
    }

    window.swap_buffers();
  }
}