432 lines
16 KiB
Rust
432 lines
16 KiB
Rust
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use winit::{
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event::*,
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event_loop::EventLoop,
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keyboard::{KeyCode, PhysicalKey},
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window::WindowBuilder,
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};
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use winit::window::Window;
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use wgpu::util::DeviceExt;
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#[repr(C)]
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#[derive(Copy, Clone, Debug, bytemuck::Pod, bytemuck::Zeroable)]
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struct Vertex {
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position: [f32; 3],
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color: [f32; 3],
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}
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impl Vertex {
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fn desc() -> wgpu::VertexBufferLayout<'static> {
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wgpu::VertexBufferLayout {
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array_stride: std::mem::size_of::<Vertex>() as wgpu::BufferAddress,
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step_mode: wgpu::VertexStepMode::Vertex,
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attributes: &[
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wgpu::VertexAttribute {
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offset: 0,
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shader_location: 0,
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format: wgpu::VertexFormat::Float32x3,
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},
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wgpu::VertexAttribute {
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offset: std::mem::size_of::<[f32; 3]>() as wgpu::BufferAddress,
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shader_location: 1,
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format: wgpu::VertexFormat::Float32x3,
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}
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]
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}
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}
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}
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const VERTICES: &[Vertex] = &[
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Vertex { position: [-0.0868241, 0.49240386, 0.0], color: [0.5, 0.0, 0.5] }, // A
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Vertex { position: [-0.49513406, 0.06958647, 0.0], color: [0.5, 0.0, 0.5] }, // B
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Vertex { position: [-0.21918549, -0.44939706, 0.0], color: [0.5, 0.0, 0.5] }, // C
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Vertex { position: [0.35966998, -0.3473291, 0.0], color: [0.5, 0.0, 0.5] }, // D
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Vertex { position: [0.44147372, 0.2347359, 0.0], color: [0.5, 0.0, 0.5] }, // E
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];
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const INDICES: &[u16] = &[
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0, 1, 4,
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1, 2, 4,
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2, 3, 4,
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];
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struct State<'a> {
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surface: wgpu::Surface<'a>,
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device: wgpu::Device,
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queue: wgpu::Queue,
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config: wgpu::SurfaceConfiguration,
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size: winit::dpi::PhysicalSize<u32>,
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// The window must be declared after the surface so
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// it gets dropped after it as the surface contains
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// unsafe references to the window's resources.
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window: &'a Window,
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render_pipeline: wgpu::RenderPipeline,
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vertex_buffer: wgpu::Buffer,
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index_buffer: wgpu::Buffer,
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num_indices: u32,
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}
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impl<'a> State<'a> {
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// Creating some of the wgpu types requires async code
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async fn new(window: &'a Window) -> State<'a> {
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let size = window.inner_size();
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let num_vertices = VERTICES.len() as u32;
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// The instance is a handle to our GPU
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// Backends::all => Vulkan + Metal + DX12 + Browser WebGPU
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let instance = wgpu::Instance::new(wgpu::InstanceDescriptor {
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// TODO: Change this when enabling switchable graphics for the user
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// If this is not for the web, we can use Vulkan + Metal + DX12
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#[cfg(not(target_arch="wasm32"))]
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backends: wgpu::Backends::PRIMARY,
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// TODO: Probably remove this, because WebAssembly won't be used for the foreseeable future
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#[cfg(target_arch="wasm32")]
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backends: wgpu::Backends::GL,
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..Default::default()
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});
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let surface = instance.create_surface(window).unwrap();
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// This checks all the adapters on a machine and returns an iterator
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/*let adapter = instance
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.enumerate_adapters(wgpu::Backends::all())
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.filter(|adapter| {
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// Check if this adapter supports our surface
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adapter.is_surface_supported(&surface)
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})
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.next()
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.unwrap()*/
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// TODO: Include Telemetry to see how many users WGPU chooses a suboptimal adapter for
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let adapter = instance.request_adapter(
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&wgpu::RequestAdapterOptions {
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power_preference: wgpu::PowerPreference::default(),
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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.unwrap();
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log::info!("Adapter: {:?}", adapter.get_info());
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// List of all features the current device supports
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// let features = adapter.features();
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let (device, queue) = adapter.request_device(
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&wgpu::DeviceDescriptor {
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required_features: wgpu::Features::empty(),
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// WebGL doesn't support all of wgpu's features, so if
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// we're building for the web, we'll have to disable some.
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// TODO: Probably remove check for wasm32, because WebAssembly won't be used for the foreseeable future
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required_limits: if cfg!(target_arch = "wasm32") {
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wgpu::Limits::downlevel_webgl2_defaults()
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} else {
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wgpu::Limits::default()
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},
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label: None,
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// Default is performance, which requires more memory, but is faster
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memory_hints: Default::default(),
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},
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None, // Trace path
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).await.unwrap();
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let surface_caps = surface.get_capabilities(&adapter);
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// Shader code assumes an sRGB surface texture. Using a different
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// one will result in all the colors coming out darker. If you want to support non
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// sRGB surfaces, you'll need to account for that when drawing to the frame.
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let surface_format = surface_caps.formats.iter()
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.find(|f| f.is_srgb())
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.copied()
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.unwrap_or(surface_caps.formats[0]);
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log::info!("Surface format: {:?}", surface_format);
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log::info!("Surface present modes: {:?}", surface_caps.present_modes);
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log::info!("Surface alpha modes: {:?}", surface_caps.alpha_modes);
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let config = wgpu::SurfaceConfiguration {
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usage: wgpu::TextureUsages::RENDER_ATTACHMENT,
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format: surface_format,
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width: size.width,
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height: size.height,
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// PresentMod::Fifo => VSync (Always supported)
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present_mode: surface_caps.present_modes[0],
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alpha_mode: surface_caps.alpha_modes[0],
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view_formats: vec![],
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desired_maximum_frame_latency: 2,
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};
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let render_pipeline_layout =
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device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor {
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label: Some("Render Pipeline Layout"),
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bind_group_layouts: &[],
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push_constant_ranges: &[],
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});
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let shader = device.create_shader_module(wgpu::ShaderModuleDescriptor {
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label: Some("Shader"),
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source: wgpu::ShaderSource::Wgsl(include_str!("shader.wgsl").into()),
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});
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let render_pipeline = device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
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label: Some("Render Pipeline"),
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layout: Some(&render_pipeline_layout),
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vertex: wgpu::VertexState {
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module: &shader,
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entry_point: "vs_main",
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buffers: &[Vertex::desc()],
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compilation_options: Default::default(),
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},
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fragment: Some(wgpu::FragmentState {
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module: &shader,
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entry_point: "fs_main",
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targets: &[Some(wgpu::ColorTargetState {
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format: config.format,
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blend: Some(wgpu::BlendState::REPLACE),
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write_mask: wgpu::ColorWrites::ALL,
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})],
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compilation_options: wgpu::PipelineCompilationOptions::default(),
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}),
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primitive: wgpu::PrimitiveState {
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topology: wgpu::PrimitiveTopology::TriangleList,
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strip_index_format: None,
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front_face: wgpu::FrontFace::Ccw,
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cull_mode: Some(wgpu::Face::Back),
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// Setting this to anything other than Fill requires Features::NON_FILL_POLYGON_MODE
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polygon_mode: wgpu::PolygonMode::Fill,
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// Requires Features::DEPTH_CLIP_CONTROL
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unclipped_depth: false,
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// Requires Features::CONSERVATIVE_RASTERIZATION
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conservative: false,
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},
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depth_stencil: None,
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multisample: wgpu::MultisampleState {
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count: 1,
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mask: !0,
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alpha_to_coverage_enabled: false,
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},
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multiview: None,
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cache: None,
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});
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let vertex_buffer = device.create_buffer_init(
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&wgpu::util::BufferInitDescriptor {
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label: Some("Vertex Buffer"),
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contents: bytemuck::cast_slice(VERTICES),
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usage: wgpu::BufferUsages::VERTEX,
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}
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);
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let index_buffer = device.create_buffer_init(
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&wgpu::util::BufferInitDescriptor {
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label: Some("Index Buffer"),
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contents: bytemuck::cast_slice(INDICES),
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usage: wgpu::BufferUsages::INDEX,
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}
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);
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let num_indices = INDICES.len() as u32;
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Self {
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window,
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surface,
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device,
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queue,
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config,
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size,
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render_pipeline,
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vertex_buffer,
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index_buffer,
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num_indices,
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}
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}
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pub fn window(&self) -> &Window {
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&self.window
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}
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fn resize(&mut self, new_size: winit::dpi::PhysicalSize<u32>) {
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if new_size.width > 0 && new_size.height > 0 {
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self.size = new_size;
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self.config.width = new_size.width;
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self.config.height = new_size.height;
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self.surface.configure(&self.device, &self.config);
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}
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}
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fn input(&mut self, event: &WindowEvent) -> bool {
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// Change color on mouse move
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match event {
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WindowEvent::CursorMoved { position, .. } => {
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/*let size = self.size;
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let color = wgpu::Color {
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r: position.x as f64 / size.width as f64,
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g: position.y as f64 / size.height as f64,
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b: 0.3,
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a: 1.0,
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};
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let output = self.surface.get_current_texture().unwrap();
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let view = output.texture.create_view(&wgpu::TextureViewDescriptor::default());
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let mut encoder = self.device.create_command_encoder(&wgpu::CommandEncoderDescriptor {
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label: Some("Render Encoder"),
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});
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{
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let _render_pass = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
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label: Some("Render Pass"),
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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: wgpu::Operations {
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load: wgpu::LoadOp::Clear(color),
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store: wgpu::StoreOp::Store,
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},
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})],
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depth_stencil_attachment: None,
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occlusion_query_set: None,
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timestamp_writes: None,
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});
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}
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self.queue.submit(std::iter::once(encoder.finish()));
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output.present();
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return true;*/
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false
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}
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WindowEvent::KeyboardInput {
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event:
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KeyEvent {
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state: ElementState::Pressed,
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physical_key: PhysicalKey::Code(KeyCode::Space),
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..
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},
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..
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} => {
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true
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}
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_ => {
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false
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}
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}
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}
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fn update(&mut self) {
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}
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fn render(&mut self) -> Result<(), wgpu::SurfaceError> {
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let output = self.surface.get_current_texture()?;
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let view = output.texture.create_view(&wgpu::TextureViewDescriptor::default());
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let mut encoder = self.device.create_command_encoder(&wgpu::CommandEncoderDescriptor {
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label: Some("Render Encoder"),
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});
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{
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let mut render_pass = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
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label: Some("Render Pass"),
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color_attachments: &[
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// This is what @location(0) in the fragment shader targets
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Some(wgpu::RenderPassColorAttachment {
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view: &view,
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resolve_target: None,
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ops: wgpu::Operations {
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load: wgpu::LoadOp::Clear(
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wgpu::Color {
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r: 0.1,
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g: 0.2,
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b: 0.3,
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a: 1.0,
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}
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),
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store: wgpu::StoreOp::Store,
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}
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})
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],
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depth_stencil_attachment: None,
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occlusion_query_set: None,
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timestamp_writes: None,
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});
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render_pass.set_pipeline(&self.render_pipeline);
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render_pass.set_vertex_buffer(0, self.vertex_buffer.slice(..));
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render_pass.set_index_buffer(self.index_buffer.slice(..), wgpu::IndexFormat::Uint16);
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render_pass.draw_indexed(0..self.num_indices, 0, 0..1);
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}
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// submit will accept anything that implements IntoIter
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self.queue.submit(std::iter::once(encoder.finish()));
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output.present();
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Ok(())
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}
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}
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pub async fn run() {
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env_logger::init();
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let event_loop = EventLoop::new().unwrap();
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let window = WindowBuilder::new().build(&event_loop).unwrap();
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let mut state = State::new(&window).await;
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// Variable used to prevent rendering before the surface is configured
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let mut surface_configured = false;
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event_loop.run(move |event, control_flow| {
|
||
|
|
match event {
|
||
|
|
Event::WindowEvent {
|
||
|
|
ref event,
|
||
|
|
window_id,
|
||
|
|
} if window_id == state.window().id() => if !state.input(event) {
|
||
|
|
match event {
|
||
|
|
WindowEvent::CloseRequested
|
||
|
|
| WindowEvent::KeyboardInput {
|
||
|
|
event:
|
||
|
|
KeyEvent {
|
||
|
|
state: ElementState::Pressed,
|
||
|
|
physical_key: PhysicalKey::Code(KeyCode::Escape),
|
||
|
|
..
|
||
|
|
},
|
||
|
|
..
|
||
|
|
} => control_flow.exit(),
|
||
|
|
|
||
|
|
WindowEvent::Resized(physical_size) => {
|
||
|
|
surface_configured = true;
|
||
|
|
state.resize(*physical_size);
|
||
|
|
}
|
||
|
|
|
||
|
|
WindowEvent::RedrawRequested => {
|
||
|
|
// This tells winit that we want another frame after this one
|
||
|
|
state.window().request_redraw();
|
||
|
|
|
||
|
|
if !surface_configured {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
state.update();
|
||
|
|
match state.render() {
|
||
|
|
Ok(_) => {}
|
||
|
|
// Reconfigure the surface if it's lost or outdated
|
||
|
|
Err(
|
||
|
|
wgpu::SurfaceError::Lost | wgpu::SurfaceError::Outdated,
|
||
|
|
) => state.resize(state.size),
|
||
|
|
// The system is out of memory, we should probably quit
|
||
|
|
Err(wgpu::SurfaceError::OutOfMemory) => {
|
||
|
|
log::error!("OutOfMemory");
|
||
|
|
control_flow.exit();
|
||
|
|
}
|
||
|
|
|
||
|
|
// This happens when the a frame takes too long to present
|
||
|
|
Err(wgpu::SurfaceError::Timeout) => {
|
||
|
|
log::warn!("Surface timeout")
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
_ => {}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
_ => {}
|
||
|
|
}
|
||
|
|
}).expect("Event loop crashed unexpectedly");
|
||
|
|
}
|