nes_rust_slim 0.2.0

NES emulator written in Rust
Documentation 
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use display::{Display, PIXELS_CAPACITY, PIXEL_BYTES, SCREEN_HEIGHT, SCREEN_WIDTH};

pub struct DefaultDisplay {
    pixels: Vec<u8>,
}

impl DefaultDisplay {
    pub fn new() -> Self {
        DefaultDisplay {
            pixels: vec![0; PIXELS_CAPACITY],
        }
    }
}

impl Display for DefaultDisplay {
    fn render_pixel(&mut self, x: u16, y: u16, c: u32) {
        let r = ((c >> 16) & 0xff) as u8;
        let g = ((c >> 8) & 0xff) as u8;
        let b = (c & 0xff) as u8;
        let base_index = (y as u32 * SCREEN_WIDTH + x as u32) * PIXEL_BYTES;
        // Is this memory layout, BGR, correct?
        self.pixels[(base_index + 2) as usize] = r;
        self.pixels[(base_index + 1) as usize] = g;
        self.pixels[(base_index + 0) as usize] = b;
    }

    fn vblank(&mut self) {}

    fn copy_to_rgba_pixels(&self, pixels: &mut [u8]) {
        for y in 0..SCREEN_HEIGHT {
            for x in 0..SCREEN_WIDTH {
                let base_index = (y * SCREEN_WIDTH + x) as usize;
                pixels[base_index * 4 + 0] = self.pixels[base_index * 3 + 0];
                pixels[base_index * 4 + 1] = self.pixels[base_index * 3 + 1];
                pixels[base_index * 4 + 2] = self.pixels[base_index * 3 + 2];
                pixels[base_index * 4 + 3] = 255;
            }
        }
    }
}