126 lines
4.6 KiB
Rust
126 lines
4.6 KiB
Rust
use egui_wgpu_backend::wgpu;
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use egui_winit::winit::{
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self,
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event::{Event, WindowEvent},
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event_loop::{ControlFlow, EventLoop},
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window::WindowBuilder,
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};
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async fn get_device(
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window: &winit::window::Window,
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) -> (
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wgpu::Device,
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wgpu::Queue,
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wgpu::Surface,
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wgpu::SurfaceConfiguration,
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) {
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let size = window.inner_size();
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let instance = wgpu::Instance::new(wgpu::Backends::PRIMARY);
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let surface = unsafe { instance.create_surface(window) };
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let adapter = instance
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.request_adapter(&wgpu::RequestAdapterOptions {
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power_preference: wgpu::PowerPreference::LowPower,
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compatible_surface: Some(&surface),
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force_fallback_adapter: false,
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})
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.await
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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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features: wgpu::Features::empty(),
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limits: wgpu::Limits::default(),
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label: None,
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},
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None,
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)
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.await
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.unwrap();
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let config = wgpu::SurfaceConfiguration {
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usage: wgpu::TextureUsages::RENDER_ATTACHMENT,
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format: surface.get_preferred_format(&adapter).unwrap(),
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width: size.width,
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height: size.height,
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present_mode: wgpu::PresentMode::Mailbox,
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};
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surface.configure(&device, &config);
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(device, queue, surface, config)
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}
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fn main() {
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let event_loop = EventLoop::new();
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let window = WindowBuilder::new()
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.with_title("Cyborg Editor")
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.build(&event_loop)
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.unwrap();
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let mut egui_state = egui_winit::State::new(4096, &window);
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let egui_ctx = egui::Context::default();
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let (device, queue, surface, surface_config) = pollster::block_on(get_device(&window));
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let mut egui_rp = egui_wgpu_backend::RenderPass::new(&device, surface_config.format, 1);
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event_loop.run(move |event, _, control_flow| {
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*control_flow = ControlFlow::Wait;
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println!("{:?}", event);
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match event {
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Event::WindowEvent { event, window_id } if window_id == window.id() => match event {
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WindowEvent::CloseRequested => *control_flow = ControlFlow::Exit,
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event => {
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egui_state.on_event(&egui_ctx, &event);
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}
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},
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Event::RedrawRequested(window_id) if window_id == window.id() => {
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match surface.get_current_texture() {
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// Err(wgpu::SurfaceError::Lost) => resize(),
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Err(wgpu::SurfaceError::OutOfMemory) => *control_flow = ControlFlow::Exit,
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Err(e) => eprintln!("Surface error: {:?}", e),
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Ok(surface_texture) => {
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let raw_input = egui_state.take_egui_input(&window);
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let output = egui_ctx.run(raw_input, |ctx| {
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egui::CentralPanel::default().show(ctx, |ui| {
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ui.heading("Hello world!");
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});
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});
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egui_state.handle_platform_output(
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&window,
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&egui_ctx,
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output.platform_output,
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);
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let meshes = egui_ctx.tessellate(output.shapes);
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let screen_desc = egui_wgpu_backend::ScreenDescriptor {
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physical_width: surface_config.width,
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physical_height: surface_config.height,
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scale_factor: 1.0, // TODO ???
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};
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egui_rp.update_buffers(&device, &queue, &meshes, &screen_desc);
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egui_rp
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.add_textures(&device, &queue, &output.textures_delta)
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.unwrap();
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let output_view = surface_texture.texture.create_view(&Default::default());
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let mut cmds = device.create_command_encoder(&Default::default());
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egui_rp
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.execute(&mut cmds, &output_view, &meshes, &screen_desc, None)
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.unwrap();
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queue.submit(std::iter::once(cmds.finish()));
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surface_texture.present();
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egui_rp.remove_textures(output.textures_delta).unwrap();
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}
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}
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}
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Event::MainEventsCleared => {
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window.request_redraw();
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}
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_ => (),
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}
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});
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}
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