141 lines
4.5 KiB
Rust
141 lines
4.5 KiB
Rust
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use fontdue::{
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layout::{CoordinateSystem, Layout, LayoutSettings, TextStyle},
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Font, FontSettings,
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};
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use wgpu::{
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Color, CommandEncoderDescriptor, LoadOp, Operations, RenderPassColorAttachment,
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RenderPassDescriptor, TextureViewDescriptor,
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};
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use glyphon::{Resolution, TextRenderer};
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use winit::{
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event::{Event, WindowEvent},
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event_loop::{ControlFlow, EventLoop},
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window::Window,
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};
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fn main() {
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pollster::block_on(run());
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}
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async fn run() {
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let instance = wgpu::Instance::new(wgpu::Backends::all());
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let adapter = instance
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.request_adapter(&wgpu::RequestAdapterOptions::default())
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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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label: None,
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features: wgpu::Features::empty(),
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limits: wgpu::Limits::downlevel_defaults(),
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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 event_loop = EventLoop::new();
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let window = Window::new(&event_loop).unwrap();
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let surface = unsafe { instance.create_surface(&window) };
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let size = window.inner_size();
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let swapchain_format = surface.get_preferred_format(&adapter).unwrap();
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let mut config = wgpu::SurfaceConfiguration {
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usage: wgpu::TextureUsages::RENDER_ATTACHMENT,
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format: swapchain_format,
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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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let mut text_renderer = TextRenderer::new(
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&device,
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&queue,
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swapchain_format,
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Resolution {
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width: size.width,
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height: size.height,
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},
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);
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let font = include_bytes!("./Inter-Bold.ttf") as &[u8];
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let font = Font::from_bytes(font, FontSettings::default()).unwrap();
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let fonts = vec![font];
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let mut layout = Layout::new(CoordinateSystem::PositiveYDown);
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event_loop.run(move |event, _, control_flow| {
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let _ = (&instance, &adapter);
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*control_flow = ControlFlow::Poll;
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match event {
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Event::WindowEvent {
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event: WindowEvent::Resized(size),
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..
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} => {
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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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window.request_redraw();
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}
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Event::RedrawRequested(_) => {
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layout.reset(&LayoutSettings {
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x: 0.0,
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y: 0.0,
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..LayoutSettings::default()
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});
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layout.append(
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fonts.as_slice(),
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&TextStyle::new("Hello world!\nI'm on a new line!", 50.0, 0),
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);
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text_renderer
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.prepare(
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&device,
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&queue,
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Resolution {
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width: config.width,
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height: config.height,
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},
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&fonts,
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&[&layout],
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)
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.unwrap();
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let frame = surface.get_current_texture().unwrap();
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let view = frame.texture.create_view(&TextureViewDescriptor::default());
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let mut encoder =
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device.create_command_encoder(&CommandEncoderDescriptor { label: None });
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{
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let mut pass = encoder.begin_render_pass(&RenderPassDescriptor {
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label: None,
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color_attachments: &[RenderPassColorAttachment {
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view: &view,
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resolve_target: None,
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ops: Operations {
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load: LoadOp::Clear(Color::BLACK),
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store: true,
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},
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}],
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depth_stencil_attachment: None,
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});
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text_renderer.render(&mut pass).unwrap();
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}
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queue.submit(Some(encoder.finish()));
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frame.present();
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}
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Event::WindowEvent {
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event: WindowEvent::CloseRequested,
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..
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} => *control_flow = ControlFlow::Exit,
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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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