91 lines
2.6 KiB
Rust
91 lines
2.6 KiB
Rust
use std::fs::File;
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use std::io::Read;
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use std::time::Duration;
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use sdl2::event::Event;
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use sdl2::EventPump;
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use sdl2::keyboard::Keycode;
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use sdl2::pixels::Color;
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use sdl2::render::WindowCanvas;
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use simple_logger::SimpleLogger;
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use crate::emu::cpu::Cpu;
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use crate::emu::graphics::GraphicsProcessor;
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use crate::emu::ram::{MEM_LENGTH, RamMemory};
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use crate::graphics::graphics_adapter::SDLGraphicsAdapter;
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use crate::misc::result::EmulatorResult;
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mod emu;
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mod args;
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mod misc;
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mod graphics;
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fn main() -> EmulatorResult<()> {
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let (file_bytes, x) = try_load_rom()?;
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assert!(x < MEM_LENGTH);
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SimpleLogger::new().env().init().unwrap();
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let ram = RamMemory::try_from(file_bytes.as_slice())?;
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let (mut canvas, mut event_pump, draw_factor) = initiate_sdl();
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let graphics_processor = GraphicsProcessor::try_new(&ram)?;
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let sdl2_graphics_adapter = SDLGraphicsAdapter::new(&graphics_processor);
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let cpu = Cpu::new(&ram, &graphics_processor);
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'running: loop {
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canvas.set_draw_color(Color::BLACK);
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canvas.clear();
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for event in event_pump.poll_iter() {
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match event {
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Event::Quit { .. } |
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Event::KeyDown { keycode: Some(Keycode::Escape), .. } => {
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break 'running;
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}
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event => {
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log::trace!("Received window event {:?}",event);
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}
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}
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}
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// The rest of the game loop goes here...
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cpu.cycle()?;
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// draw graphics
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sdl2_graphics_adapter.draw(&mut canvas, draw_factor)?;
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// TODO render audio
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canvas.present();
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::std::thread::sleep(Duration::new(0, 1_000_000_000u32 / 60));
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}
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Ok(())
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}
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fn try_load_rom() -> EmulatorResult<(Vec<u8>, usize)> {
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let mut file_bytes = vec![0u8; MEM_LENGTH];
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let mut file_handle = File::open("rom.BytePusher")?;
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let x = file_handle.read(&mut file_bytes)?;
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Ok((file_bytes, x))
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}
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fn initiate_sdl() -> (WindowCanvas, EventPump, u32) {
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const BASE_RESOLUTION: u32 = 256;
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const DRAW_FACTOR: u32 = 4;
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const WINDOW_RESOLUTION: u32 = BASE_RESOLUTION * DRAW_FACTOR;
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let sdl_context = sdl2::init().unwrap();
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let video_subsystem = sdl_context.video().unwrap();
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let window = video_subsystem.window("byte-pusher-emu", WINDOW_RESOLUTION, WINDOW_RESOLUTION)
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.position_centered()
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.build()
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.unwrap();
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let mut canvas = window.into_canvas().build().unwrap();
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canvas.set_draw_color(Color::RGB(0, 255, 255));
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canvas.clear();
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canvas.present();
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let mut event_pump = sdl_context.event_pump().unwrap();
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(canvas, event_pump, DRAW_FACTOR)
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}
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