path: root/src/main.rs

extern crate core;
mod memory;
mod mos6502;
mod ppu;
mod cartridge;
mod mapper;

use std::fs::File;
use std::io::Read;
use core::cell::{RefCell, UnsafeCell};
use core::intrinsics::transmute;
use cartridge::*;
use std::time::{Instant, Duration};
use std::thread::sleep;

extern crate sdl2;

use sdl2::pixels::Color;
use sdl2::rect::Rect;
use sdl2::pixels::PixelFormatEnum;
use sdl2::event::Event;
use sdl2::keyboard::Keycode;

const PIXEL_SIZE: u32 = 2;
const RGB_COLORS: [u32; 64] = [
    0x666666, 0x002a88, 0x1412a7, 0x3b00a4, 0x5c007e, 0x6e0040, 0x6c0600, 0x561d00,
    0x333500, 0x0b4800, 0x005200, 0x004f08, 0x00404d, 0x000000, 0x000000, 0x000000,
    0xadadad, 0x155fd9, 0x4240ff, 0x7527fe, 0xa01acc, 0xb71e7b, 0xb53120, 0x994e00,
    0x6b6d00, 0x388700, 0x0c9300, 0x008f32, 0x007c8d, 0x000000, 0x000000, 0x000000,
    0xfffeff, 0x64b0ff, 0x9290ff, 0xc676ff, 0xf36aff, 0xfe6ecc, 0xfe8170, 0xea9e22,
    0xbcbe00, 0x88d800, 0x5ce430, 0x45e082, 0x48cdde, 0x4f4f4f, 0x000000, 0x000000,
    0xfffeff, 0xc0dfff, 0xd3d2ff, 0xe8c8ff, 0xfbc2ff, 0xfec4ea, 0xfeccc5, 0xf7d8a5,
    0xe4e594, 0xcfef96, 0xbdf4ab, 0xb3f3cc, 0xb5ebf2, 0xb8b8b8, 0x000000, 0x000000,
];

const PIX_WIDTH: usize = 256;
const PIX_HEIGHT: usize = 240;
const FB_PITCH: usize = PIX_WIDTH * 3 * (PIXEL_SIZE as usize);
const FB_SIZE: usize = PIX_HEIGHT * FB_PITCH * (PIXEL_SIZE as usize);
const WIN_WIDTH: u32 = PIX_WIDTH as u32 * PIXEL_SIZE;
const WIN_HEIGHT: u32 = PIX_HEIGHT as u32 * PIXEL_SIZE;

struct DummyWindow {
    buff: RefCell<[[u8; PIX_HEIGHT]; PIX_WIDTH]>
}

impl ppu::Screen for DummyWindow {
    fn put(&self, x: u8, y: u8, color: u8) {
        self.buff.borrow_mut()[y as usize][x as usize] = color;
    }
    fn render(&self) {
        println!("a frame has been redrawn:");
        for r in self.buff.borrow().iter() {
            for c in r.iter() {
                print!("{:02x}", c);
            }
            println!("");
        }
    }
}

struct SDLWindow {
    canvas: RefCell<sdl2::render::WindowCanvas>,
    events: RefCell<sdl2::EventPump>,
    frame_buffer: UnsafeCell<[u8; FB_SIZE]>,
    texture_creator: sdl2::render::TextureCreator<sdl2::video::WindowContext>,
}

impl SDLWindow {
    fn new() -> Self {
        let sdl_context = sdl2::init().unwrap();
        let video_subsystem = sdl_context.video().unwrap();
        let window = video_subsystem.window("RuNES", WIN_WIDTH, WIN_HEIGHT)
                                    .position_centered()
                                    .opengl()
                                    .build()
                                    .unwrap();
        let mut canvas = window.into_canvas().build().unwrap();
        let texture_creator = canvas.texture_creator();
        canvas.set_draw_color(Color::RGB(255, 255, 255));
        canvas.clear();
        canvas.present();
        SDLWindow {
            canvas: RefCell::new(canvas),
            events: RefCell::new(sdl_context.event_pump().unwrap()),
            frame_buffer: UnsafeCell::new([0; FB_SIZE]),
            texture_creator,
        }
    }

    fn poll(&self) -> bool {
        for event in self.events.borrow_mut().poll_iter() {
            match event {
                Event::Quit {..} | Event::KeyDown { keycode: Some(