131 lines
4.0 KiB
Rust
131 lines
4.0 KiB
Rust
use anyhow::{anyhow, Result};
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use clap::{crate_authors, crate_description, crate_name, crate_version, App, Arg};
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use gb::{AudioSPSC, Cycle, GB_HEIGHT, GB_WIDTH};
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use gilrs::Gilrs;
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use pixels::{PixelsBuilder, SurfaceTexture};
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use rodio::{OutputStream, Sink};
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use winit::dpi::{LogicalSize, PhysicalSize};
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use winit::event::{Event, VirtualKeyCode};
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use winit::event_loop::{ControlFlow, EventLoop};
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use winit::window::{Window, WindowBuilder};
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use winit_input_helper::WinitInputHelper;
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const WINDOW_SCALE: usize = 3;
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const AUDIO_ENABLED: bool = false;
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fn main() -> Result<()> {
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let app = App::new(crate_name!())
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.version(crate_version!())
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.author(crate_authors!())
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.about(crate_description!());
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let m = app
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.arg(
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Arg::with_name("rom")
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.value_name("ROM_FILE")
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.takes_value(true)
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.required(true)
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.index(1)
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.help("Path to the Game ROM"),
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)
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.arg(
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Arg::with_name("boot")
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.short("b")
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.long("boot")
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.value_name("FILE")
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.takes_value(true)
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.help("Path to Boot ROM"),
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)
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.get_matches();
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let rom_path = m
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.value_of("rom")
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.expect("Required value 'rom' was provided");
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let mut game_boy =
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gb::emu::init(m.value_of("boot"), rom_path).expect("Initialize DMG-01 Emulator");
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let rom_title = gb::emu::rom_title(&game_boy);
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let mut gamepad = Gilrs::new().expect("Initialize Controller Support");
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// Initialize GUI
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let event_loop = EventLoop::new();
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let mut input = WinitInputHelper::new();
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let window = create_window(&event_loop, rom_title)?;
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let mut pixels = {
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let size = window.inner_size();
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let surface_texture = SurfaceTexture::new(size.width, size.height, &window);
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PixelsBuilder::new(GB_WIDTH as u32, GB_HEIGHT as u32, surface_texture)
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.enable_vsync(false)
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.build()?
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};
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// Initialize Audio
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let (_stream, stream_handle) = OutputStream::try_default().expect("Initialized Audio");
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if AUDIO_ENABLED {
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let spsc: AudioSPSC<f32> = Default::default();
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let (prod, cons) = spsc.init();
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let sink = Sink::try_new(&stream_handle)?;
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sink.append(cons);
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sink.set_volume(0.1); // TODO: Is this the right way to go about this?
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game_boy.apu_mut().attach_producer(prod);
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std::thread::spawn(move || {
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sink.sleep_until_end();
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});
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}
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let mut cycle_count: Cycle = Default::default();
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event_loop.run(move |event, _, control_flow| {
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if let Event::RedrawRequested(_) = event {
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if pixels
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.render()
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.map_err(|e| anyhow!("pixels.render() failed: {}", e))
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.is_err()
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{
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*control_flow = ControlFlow::Exit;
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return;
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}
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}
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if input.update(&event) {
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if input.key_pressed(VirtualKeyCode::Escape) || input.quit() {
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*control_flow = ControlFlow::Exit;
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return;
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}
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if let Some(size) = input.window_resized() {
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pixels.resize_surface(size.width, size.height);
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}
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cycle_count += gb::emu::run_frame(&mut game_boy, &mut gamepad, &input);
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if cycle_count >= gb::emu::CYCLES_IN_FRAME {
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cycle_count %= gb::emu::CYCLES_IN_FRAME;
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gb::emu::draw(game_boy.ppu(), pixels.get_frame());
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window.request_redraw();
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}
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}
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});
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}
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fn create_window(event_loop: &EventLoop<()>, title: &str) -> Result<Window> {
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let logical = LogicalSize::new(GB_WIDTH as f64, GB_HEIGHT as f64);
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let physical = PhysicalSize::new(
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(GB_WIDTH * WINDOW_SCALE) as f32,
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(GB_HEIGHT * WINDOW_SCALE) as f32,
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);
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Ok(WindowBuilder::new()
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.with_title(title)
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.with_min_inner_size(logical)
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.with_inner_size(physical)
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.with_resizable(true)
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.build(event_loop)?)
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}
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