82 lines
2.6 KiB
Rust
82 lines
2.6 KiB
Rust
use pixels::{Error, Pixels, SurfaceTexture};
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use winit::event;
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use winit::event_loop::{ControlFlow, EventLoop};
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fn scale_pixel_ferris(width: u32, height: u32) -> Vec<u8> {
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let mut px = Vec::new();
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const FERRIS_WIDTH: u32 = 11;
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const FERRIS_HEIGHT: u32 = 5;
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#[rustfmt::skip]
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const FERRIS: [u8; (FERRIS_WIDTH * FERRIS_HEIGHT) as usize] = [
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0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0,
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1, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1,
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0, 0, 1, 1, 2, 1, 2, 1, 1, 0, 0,
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0, 1, 3, 1, 1, 2, 1, 1, 3, 1, 0,
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0, 0, 1, 3, 0, 0, 0, 3, 1, 0, 0,
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];
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let scale = width / FERRIS_WIDTH;
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let top = (height - scale * FERRIS_HEIGHT) / 2;
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let bottom = height - top - 1;
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for y in 0..height {
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for x in 0..width {
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let rgba = if y < top || y >= bottom || x / scale >= FERRIS_WIDTH {
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[0xdd, 0xba, 0xdc, 0xff]
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} else {
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let i = x / scale + (y - top) / scale * FERRIS_WIDTH;
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match FERRIS[i as usize] {
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0 => [0xdd, 0xba, 0xdc, 0xff],
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1 => [0xf7, 0x4c, 0x00, 0xff],
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2 => [0x00, 0x00, 0x00, 0xff],
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3 => [0xa5, 0x2b, 0x00, 0xff],
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_ => unreachable!(),
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}
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};
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px.extend_from_slice(&rgba);
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}
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}
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px
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}
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fn main() -> Result<(), Error> {
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env_logger::init();
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let event_loop = EventLoop::new();
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let (window, surface, width, height) = {
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let window = winit::window::Window::new(&event_loop).unwrap();
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let surface = wgpu::Surface::create(&window);
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let size = window.inner_size().to_physical(window.hidpi_factor());
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(window, surface, size.width as u32, size.height as u32)
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};
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let surface_texture = SurfaceTexture::new(width, height, &surface);
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let mut fb = Pixels::new(320, 240, surface_texture)?;
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let ferris = scale_pixel_ferris(320, 240);
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event_loop.run(move |event, _, control_flow| match event {
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event::Event::WindowEvent { event, .. } => match event {
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event::WindowEvent::KeyboardInput {
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input:
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event::KeyboardInput {
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virtual_keycode: Some(event::VirtualKeyCode::Escape),
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state: event::ElementState::Pressed,
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..
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},
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..
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}
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| event::WindowEvent::CloseRequested => *control_flow = ControlFlow::Exit,
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event::WindowEvent::RedrawRequested => fb.render(&ferris),
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_ => (),
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},
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event::Event::EventsCleared => window.request_redraw(),
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_ => (),
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});
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}
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