94 lines
2.3 KiB
Rust
94 lines
2.3 KiB
Rust
use std::{
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fs,
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path::Path,
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sync::mpsc::{self, TryRecvError},
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};
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use anyhow::Result;
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use crate::{renderer::GameRenderer, shrooms_vb_core::CoreVB};
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pub struct Emulator {
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sim: CoreVB,
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commands: mpsc::Receiver<EmulatorCommand>,
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renderer: Option<GameRenderer>,
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}
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impl Emulator {
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pub fn new() -> (Self, EmulatorClient) {
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let (sink, source) = mpsc::channel();
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let emu = Emulator {
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sim: CoreVB::new(),
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commands: source,
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renderer: None,
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};
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let queue = EmulatorClient { queue: sink };
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(emu, queue)
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}
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pub fn load_rom(&mut self, path: &Path) -> Result<()> {
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let bytes = fs::read(path)?;
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self.sim.load_rom(bytes)?;
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Ok(())
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}
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pub fn run(&mut self) {
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let mut eye_contents = vec![0u8; 384 * 224 * 2];
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loop {
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self.sim.emulate_frame();
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if let Some(renderer) = &mut self.renderer {
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if self.sim.read_pixels(&mut eye_contents) {
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renderer.render(&eye_contents);
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}
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}
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loop {
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match self.commands.try_recv() {
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Ok(command) => self.handle_command(command),
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Err(TryRecvError::Empty) => {
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break;
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}
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Err(TryRecvError::Disconnected) => {
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return;
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}
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}
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}
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}
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}
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fn handle_command(&mut self, command: EmulatorCommand) {
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match command {
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EmulatorCommand::SetRenderer(renderer) => {
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self.renderer = Some(renderer);
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}
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EmulatorCommand::PressStart => {
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self.sim.set_keys(0x1003);
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}
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EmulatorCommand::ReleaseStart => {
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self.sim.set_keys(0x0003);
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}
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}
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}
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}
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#[derive(Debug)]
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pub enum EmulatorCommand {
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SetRenderer(GameRenderer),
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PressStart,
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ReleaseStart,
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}
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pub struct EmulatorClient {
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queue: mpsc::Sender<EmulatorCommand>,
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}
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impl EmulatorClient {
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pub fn send_command(&self, command: EmulatorCommand) {
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if let Err(err) = self.queue.send(command) {
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eprintln!(
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"could not send command {:?} as emulator is shut down",
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err.0
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);
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}
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}
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}
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