Added rendering pipeline and window
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368
src/window.rs
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368
src/window.rs
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use std::iter;
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use winit::{
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event::*,
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event_loop::{ControlFlow, EventLoop},
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window::Window,
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window::WindowBuilder,
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};
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pub struct State {
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//Surface we will draw two
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surface: wgpu::Surface,
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// Description of a surface
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config: wgpu::SurfaceConfiguration,
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//Device we will he using to render
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device: wgpu::Device,
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// Command query for a divice
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queue: wgpu::Queue,
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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: winit::window::Window,
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// Handle to a rendering pipeline
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render_pipeline1: wgpu::RenderPipeline,
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render_pipeline2: wgpu::RenderPipeline,
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// Clear color
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clear_color: wgpu::Color,
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}
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impl State {
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// Creating some of the wgpu types requires async code
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async fn new(window: Window) -> Self {
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//Self explaining, the window size
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let size = window.inner_size();
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// Backends to handle our gpu
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let instance = wgpu::Instance::new(wgpu::InstanceDescriptor {
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backends: wgpu::Backends::all(),
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dx12_shader_compiler: Default::default(),
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});
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// Surface needs to be alive as long as window is created
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let surface = unsafe { instance.create_surface(&window) }.unwrap();
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// Handles our graphics card, gets backend the adapter uses
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// Compatible surface fields tells wgpu whats a adapter that can supply a surface
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let adapter = instance
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.request_adapter(&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
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.unwrap();
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// Use the adapter to create a device and queue
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// Includes limitations on the graphics card
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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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// 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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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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},
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None, // Trace path
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)
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.await
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.unwrap();
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// Some surfaces have different capabilities, get the capabilities
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let surface_caps = surface.get_capabilities(&adapter);
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// Find how surface textures will be stored on the GPU
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let surface_format = surface_caps
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.formats
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.iter()
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.copied()
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.find(|f| f.is_srgb())
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.unwrap_or(surface_caps.formats[0]);
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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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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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};
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surface.configure(&device, &config);
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//Load a shader into our device and get a module handler
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let shader = device.create_shader_module(wgpu::include_wgsl!("shader.wgsl"));
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//Create pipeline layout using device
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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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//Create final render pipeline
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let render_pipeline1 = 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", // 1.
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buffers: &[], // 2.
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},
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fragment: Some(wgpu::FragmentState {
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// 3.
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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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// 4.
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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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}),
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primitive: wgpu::PrimitiveState {
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topology: wgpu::PrimitiveTopology::TriangleList, // 1.
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strip_index_format: None,
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front_face: wgpu::FrontFace::Ccw, // 2.
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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, // 1.
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multisample: wgpu::MultisampleState {
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count: 1, // 2.
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mask: !0, // 3.
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alpha_to_coverage_enabled: false, // 4.
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},
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multiview: None, // 5.
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});
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let render_pipeline2 = 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", // 1.
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buffers: &[], // 2.
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},
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fragment: Some(wgpu::FragmentState {
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// 3.
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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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// 4.
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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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}),
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primitive: wgpu::PrimitiveState {
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topology: wgpu::PrimitiveTopology::TriangleList, // 1.
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strip_index_format: None,
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front_face: wgpu::FrontFace::Ccw, // 2.
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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, // 1.
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multisample: wgpu::MultisampleState {
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count: 1, // 2.
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mask: !0, // 3.
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alpha_to_coverage_enabled: false, // 4.
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},
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multiview: None, // 5.
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});
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let clear_color = wgpu::Color {
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r: 0.0,
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g: 0.2,
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b: 0.4,
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a: 1.0,
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};
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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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clear_color,
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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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pub 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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match event {
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WindowEvent::CursorLeft { .. } => {
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ren
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self.clear_color = wgpu::Color {
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r: 0.5, // Example values for when mouse is clicked
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g: 0.5,
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b: 0.5,
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a: 1.0,
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};
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true
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}
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WindowEvent::KeyboardInput { input, .. } => {
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if let Some(virtual_keycode) = input.virtual_keycode {
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match virtual_keycode {
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VirtualKeyCode::Space => {
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}
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_ => true,
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}
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} else {
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false
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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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fn update(&mut self) {}
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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
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.texture
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.create_view(&wgpu::TextureViewDescriptor::default());
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let mut encoder = self
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.device
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.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: &[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(self.clear_color),
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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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render_pass.set_pipeline(&self.render_pipeline); // 2.
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render_pass.draw(0..3, 0..1); // 3.
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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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cfg_if::cfg_if! {
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if #[cfg(target_arch = "wasm32")] {
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std::panic::set_hook(Box::new(console_error_panic_hook::hook));
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console_log::init_with_level(log::Level::Warn).expect("Couldn't initialize logger");
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} else {
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env_logger::init();
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}
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}
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let event_loop = EventLoop::new();
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let window = WindowBuilder::new().build(&event_loop).unwrap();
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#[cfg(target_arch = "wasm32")]
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{
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// Winit prevents sizing with CSS, so we have to set
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// the size manually when on web.
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use winit::dpi::PhysicalSize;
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window.set_inner_size(PhysicalSize::new(450, 400));
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use winit::platform::web::WindowExtWebSys;
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web_sys::window()
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.and_then(|win| win.document())
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.and_then(|doc| {
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let dst = doc.get_element_by_id("wasm-example")?;
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let canvas = web_sys::Element::from(window.canvas());
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dst.append_child(&canvas).ok()?;
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Some(())
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})
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.expect("Couldn't append canvas to document body.");
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}
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// State::new uses async code, so we're going to wait for it to finish
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let mut state = State::new(window).await;
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event_loop.run(move |event, _, control_flow| {
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match event {
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Event::WindowEvent {
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ref event,
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window_id,
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} if window_id == state.window().id() => {
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if !state.input(event) {
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// UPDATED!
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match event {
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WindowEvent::CloseRequested
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| WindowEvent::KeyboardInput {
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input:
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KeyboardInput {
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state: ElementState::Pressed,
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virtual_keycode: Some(VirtualKeyCode::Escape),
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..
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},
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..
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} => *control_flow = ControlFlow::Exit,
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WindowEvent::Resized(physical_size) => {
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state.resize(*physical_size);
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}
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WindowEvent::ScaleFactorChanged { new_inner_size, .. } => {
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// new_inner_size is &&mut so w have to dereference it twice
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state.resize(**new_inner_size);
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}
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_ => {}
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}
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}
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}
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Event::RedrawRequested(window_id) if window_id == state.window().id() => {
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state.update();
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match state.render() {
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Ok(_) => {}
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// Reconfigure the surface if it's lost or outdated
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Err(wgpu::SurfaceError::Lost | wgpu::SurfaceError::Outdated) => {
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state.resize(state.size)
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}
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// The system is out of memory, we should probably quit
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Err(wgpu::SurfaceError::OutOfMemory) => *control_flow = ControlFlow::Exit,
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Err(wgpu::SurfaceError::Timeout) => log::warn!("Surface timeout"),
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}
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}
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Event::RedrawEventsCleared => {
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// RedrawRequested will only trigger once, unless we manually
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// request it.
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state.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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