// Copyright (C) 2019 Oscar Shrimpton

// This program is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by the Free
// Software Foundation, either version 3 of the License, or (at your option)
// any later version.

// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
// more details.

// You should have received a copy of the GNU General Public License along
// with this program.  If not, see <http://www.gnu.org/licenses/>.

//! Renders a world to a window.
//!
//! You'll need to pick a backend using features. You should only pick one.
//! On Linux & Windows, you should use vulkan.
//! On Mac, you should use `metal`.
//! If your targetting machines without Vulkan, OpenGL or dx11/dx12 is preferred.
//! `empty` is used for testing
#[cfg(feature = "dx11")]
extern crate gfx_backend_dx11 as back;

#[cfg(feature = "dx12")]
extern crate gfx_backend_dx12 as back;

#[cfg(feature = "gl")]
extern crate gfx_backend_gl as back;

#[cfg(feature = "metal")]
extern crate gfx_backend_metal as back;

#[cfg(feature = "vulkan")]
extern crate gfx_backend_vulkan as back;

extern crate gfx_hal as hal;
extern crate stockton_types;
extern crate winit;

use stockton_types::World;

use winit::Window;

use back::{Instance};
use back::{Backend};

use std::sync::{Arc, RwLock};

pub struct Renderer<'a> {
	world: Arc<RwLock<World<'a>>>,
	instance: Instance,
	window: &'a Window,
	surface: <Backend as hal::Backend>::Surface
}

impl<'a> Renderer<'a> {
	pub fn new(world: Arc<RwLock<World<'a>>>, window: &'a Window) -> Renderer<'a> {
		let instance = Instance::create("stockton", 1);

		let surface = instance.create_surface(&window);

		Renderer {
			world, window, instance, surface
		}
	}
}