use opengl_rust::prelude::*;

use anyhow::Result;

#[tokio::main]
async fn main () -> Result <()> {
	let sdl_context = sdl2::init ().map_err (|e| anyhow! ("Can't init SDL: {}", e))?;
	let video_subsystem = sdl_context.video ().map_err (|e| anyhow! ("Can't get SDL video subsystem: {}", e))?;
	let window = video_subsystem.window ("3D platformer", 1280, 720)
		.position_centered ()
		.opengl ()
		.build ()
	?;
	
	gl::load_with (|s| {
		video_subsystem.gl_get_proc_address (s) as *const _
	});
	
	if ! gl::ClearColor::is_loaded () {
		bail! ("gl::ClearColor didn't load, something is wrong with OpenGL");
	}
	
	let gl_ctx = window.gl_create_context ().map_err (|e| anyhow! ("Can't create OpenGL context: {}", e))?;
	
	window.gl_make_current (&gl_ctx).map_err (|e| anyhow! ("Can't make OpenGL context current: {}", e))?;
	
	Ok (())
}