mirror of https://github.com/sotrh/learn-wgpu
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sotrh
1 year ago
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[package]
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name = "lost-window"
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version = "0.1.0"
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edition = "2021"
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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[dependencies]
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anyhow = "1"
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wgpu = "0.14"
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winit = "0.27"
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pollster = "0.2"
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use std::time::{Duration, Instant};
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use winit::{
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event::{Event, WindowEvent},
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event_loop::EventLoop,
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window::WindowBuilder,
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};
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async fn run() -> anyhow::Result<()> {
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let event_loop = EventLoop::new();
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let mut window = Some(
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WindowBuilder::new()
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.with_visible(false)
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.build(&event_loop)?,
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);
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let window2 = WindowBuilder::new()
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.with_visible(false)
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.build(&event_loop)?;
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let backends = wgpu::Backends::all();
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let instance = wgpu::Instance::new(backends);
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let surface = unsafe { instance.create_surface(window.as_ref().unwrap()) };
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let adapter = instance
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.enumerate_adapters(backends)
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.filter(|a| a.is_surface_supported(&surface))
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.next()
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.unwrap();
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let (device, queue) = adapter
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.request_device(
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&wgpu::DeviceDescriptor {
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label: None,
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features: Default::default(),
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limits: Default::default(),
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},
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None,
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)
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.await?;
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let inner_size = window.as_ref().unwrap().inner_size();
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let mut config = wgpu::SurfaceConfiguration {
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width: inner_size.width,
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height: inner_size.height,
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format: surface.get_supported_formats(&adapter)[0],
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usage: wgpu::TextureUsages::RENDER_ATTACHMENT,
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present_mode: Default::default(),
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alpha_mode: wgpu::CompositeAlphaMode::Auto,
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};
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surface.configure(&device, &config);
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let start_time = Instant::now();
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window.as_ref().unwrap().set_visible(true);
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window2.set_visible(true);
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event_loop.run(move |ev, _, cf| {
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match ev {
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Event::WindowEvent { event, window_id } => {
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match event {
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WindowEvent::Resized(size) => {
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if window.is_some() && window_id == window.as_ref().unwrap().id() {
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config.width = size.width;
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config.height = size.height;
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surface.configure(&device, &config);
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}
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}
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WindowEvent::CloseRequested => {
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// You'll only really want to close the window while testing
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cf.set_exit()
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}
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_ => (),
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}
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}
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Event::RedrawRequested(_) => {
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let frame = match surface.get_current_texture() {
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Ok(frame) => frame,
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Err(e) => {
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println!("An error occurred: {:?}", e);
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return;
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}
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};
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let view = frame.texture.create_view(&Default::default());
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let mut encoder = device.create_command_encoder(&Default::default());
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drop(encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
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label: None,
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color_attachments: &[Some(wgpu::RenderPassColorAttachment {
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view: &view,
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resolve_target: None,
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ops: Default::default(),
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})],
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depth_stencil_attachment: None,
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}));
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queue.submit([encoder.finish()]);
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frame.present();
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}
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Event::RedrawEventsCleared => {
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let current_time = Instant::now();
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let dt = current_time - start_time;
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// last_time = current_time;
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if let Some(w) = window.as_ref() {
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w.request_redraw();
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}
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window2.request_redraw();
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println!("dt: {:?}", dt);
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if dt > Duration::from_secs(5) {
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// Exit the loop
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cf.set_exit();
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} else if dt > Duration::from_secs(2) {
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// Dispose of the first window
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if let Some(window) = window.take() {
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drop(window);
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}
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}
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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 main() -> anyhow::Result<()> {
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pollster::block_on(run())
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}
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