404 lines
16 KiB
Rust
404 lines
16 KiB
Rust
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use std::cmp::max;
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use std::collections::HashMap;
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use std::sync::{Arc, RwLock};
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use std::thread;
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use std::time::{Duration, Instant};
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use cgmath::num_traits::{pow, ToPrimitive};
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use cgmath::Rotation3;
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use log::info;
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use pollster::FutureExt;
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use wgpu::util::DeviceExt;
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use wgpu::{Adapter, Device, Instance, PresentMode, Queue, Surface, SurfaceCapabilities, SurfaceConfiguration};
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use winit::application::ApplicationHandler;
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use winit::dpi::PhysicalSize;
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use winit::event::{ElementState, WindowEvent};
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use winit::event::WindowEvent::KeyboardInput;
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use winit::event_loop::{ActiveEventLoop, EventLoop};
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use winit::keyboard::Key;
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use winit::platform::modifier_supplement::KeyEventExtModifierSupplement;
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use winit::window::{Window, WindowId};
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use crate::render::{create_circle_vertices, Geometry, Globals, InstanceRaw, RenderInstance, SampleCount, Shape, Vertex};
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pub struct State<'a> {
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surface: Surface<'a>,
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device: Device,
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queue: Queue,
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config: SurfaceConfiguration,
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sample_count: SampleCount,
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size: PhysicalSize<u32>,
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window: Arc<Window>,
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render_pipeline: wgpu::RenderPipeline,
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instances: Vec<RenderInstance>,
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instance_buffer: wgpu::Buffer,
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geometries: HashMap<Shape, Geometry>,
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global_bind_group: wgpu::BindGroup,
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global_buffer: wgpu::Buffer,
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}
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impl<'a> State<'a> {
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pub(crate) fn new(window: Window) -> Self {
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let window_arc = Arc::new(window);
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let size = window_arc.inner_size();
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let instance = Self::create_gpu_instance();
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let surface = instance.create_surface(window_arc.clone()).unwrap();
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let adapter = Self::create_adapter(instance, &surface);
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let (device, queue) = Self::create_device(&adapter);
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let surface_caps = surface.get_capabilities(&adapter);
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let config = Self::create_surface_config(size, surface_caps);
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surface.configure(&device, &config);
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let sample_count = SampleCount(Self::probe_msaa_support(&device, &config));
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info!("MSAA sample count: {}", sample_count.0);
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let globals = Globals {
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aspect_ratio: config.width as f32 / config.height as f32,
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};
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let global_buffer = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
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label: Some("Global Uniform Buffer"),
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contents: bytemuck::cast_slice(&[globals]),
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usage: wgpu::BufferUsages::UNIFORM | wgpu::BufferUsages::COPY_DST,
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});
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let global_bind_group_layout = device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
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label: Some("Global Bind Group Layout"),
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entries: &[wgpu::BindGroupLayoutEntry {
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binding: 0,
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visibility: wgpu::ShaderStages::VERTEX,
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ty: wgpu::BindingType::Buffer {
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ty: wgpu::BufferBindingType::Uniform,
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has_dynamic_offset: false,
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min_binding_size: None,
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},
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count: None,
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}],
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});
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let global_bind_group = device.create_bind_group(&wgpu::BindGroupDescriptor {
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layout: &global_bind_group_layout,
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entries: &[wgpu::BindGroupEntry {
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binding: 0,
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resource: global_buffer.as_entire_binding(),
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}],
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label: Some("Global Bind Group"),
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});
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let render_pipeline = Self::create_render_pipeline(&device, &config, sample_count.0, &global_bind_group_layout);
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let geometries = Self::create_geometries(&device);
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let instances = vec![];
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let instance_data: Vec<InstanceRaw> = instances.iter().map(RenderInstance::to_raw).collect();
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let instance_buffer = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
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label: Some("Instance Buffer"),
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contents: bytemuck::cast_slice(&instance_data),
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usage: wgpu::BufferUsages::VERTEX | wgpu::BufferUsages::COPY_DST,
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});
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Self {
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surface,
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device,
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queue,
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config,
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sample_count,
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size,
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window: window_arc,
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render_pipeline,
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geometries,
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global_bind_group,
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global_buffer,
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instances,
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instance_buffer,
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}
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}
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fn create_geometries(device: &Device) -> HashMap<Shape, Geometry> {
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let mut geometries = HashMap::new();
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let polygon_vertices = vec![
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Vertex { position: [-0.0868241, 0.49240386, 0.0], color: [0.5, 0.0, 0.5] },
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Vertex { position: [-0.49513406, 0.06958647, 0.0], color: [0.5, 0.0, 0.5] },
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Vertex { position: [-0.21918549, -0.44939706, 0.0], color: [0.5, 0.0, 0.5] },
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Vertex { position: [0.35966998, -0.3473291, 0.0], color: [0.5, 0.0, 0.5] },
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Vertex { position: [0.44147372, 0.2347359, 0.0], color: [0.5, 0.0, 0.5] },
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];
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let polygon_indices = vec![0, 1, 4, 1, 2, 4, 2, 3, 4];
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let polygon_vertex_buffer = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
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label: Some("Polygon Vertex Buffer"),
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contents: bytemuck::cast_slice(&polygon_vertices),
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usage: wgpu::BufferUsages::VERTEX,
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});
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let polygon_index_buffer = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
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label: Some("Polygon Index Buffer"),
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contents: bytemuck::cast_slice(&polygon_indices),
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usage: wgpu::BufferUsages::INDEX,
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});
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geometries.insert(Shape::Polygon, Geometry {
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vertex_buffer: polygon_vertex_buffer,
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index_buffer: polygon_index_buffer,
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index_count: polygon_indices.len() as u32,
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});
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let (circle_vertices, circle_indices) = create_circle_vertices(512, 0.5, [0.5, 0.5, 0.5]);
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let circle_vertex_buffer = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
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label: Some("Circle Vertex Buffer"),
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contents: bytemuck::cast_slice(&circle_vertices),
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usage: wgpu::BufferUsages::VERTEX,
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});
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let circle_index_buffer = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
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label: Some("Circle Index Buffer"),
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contents: bytemuck::cast_slice(&circle_indices),
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usage: wgpu::BufferUsages::INDEX,
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});
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geometries.insert(Shape::Circle, Geometry {
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vertex_buffer: circle_vertex_buffer,
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index_buffer: circle_index_buffer,
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index_count: circle_indices.len() as u32,
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});
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geometries
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}
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fn probe_msaa_support(device: &Device, config: &SurfaceConfiguration) -> u32 {
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pollster::block_on(async {
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for &count in &[16, 8, 4, 2] {
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device.push_error_scope(wgpu::ErrorFilter::Validation);
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let _ = device.create_texture(&wgpu::TextureDescriptor {
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label: Some("MSAA Probe"),
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size: wgpu::Extent3d {
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width: 4,
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height: 4,
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depth_or_array_layers: 1,
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},
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mip_level_count: 1,
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sample_count: count,
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dimension: wgpu::TextureDimension::D2,
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format: config.format,
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usage: wgpu::TextureUsages::RENDER_ATTACHMENT,
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view_formats: &[],
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});
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if device.pop_error_scope().await.is_none() {
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return count;
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}
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}
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1 // fallback
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})
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}
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fn create_render_pipeline(device: &Device, config: &SurfaceConfiguration, sample_count: u32, global_bind_group_layout: &wgpu::BindGroupLayout) -> wgpu::RenderPipeline {
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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_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: &[&global_bind_group_layout],
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push_constant_ranges: &[],
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});
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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: Some("vs_main"),
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buffers: &[Vertex::desc(), InstanceRaw::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: Some("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: sample_count,
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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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}
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fn create_surface_config(size: PhysicalSize<u32>, capabilities: SurfaceCapabilities) -> wgpu::SurfaceConfiguration {
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let surface_format = capabilities.formats.iter()
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.find(|f| f.is_srgb())
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.copied()
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.unwrap_or(capabilities.formats[0]);
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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: PresentMode::AutoVsync,
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alpha_mode: capabilities.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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}
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fn create_device(adapter: &Adapter) -> (Device, Queue) {
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adapter.request_device(
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&wgpu::DeviceDescriptor {
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required_features: wgpu::Features::TEXTURE_ADAPTER_SPECIFIC_FORMAT_FEATURES,
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required_limits: wgpu::Limits::default(),
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memory_hints: Default::default(),
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label: None,
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trace: Default::default(),
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}).block_on().unwrap()
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}
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fn create_adapter(instance: Instance, surface: &Surface) -> Adapter {
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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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).block_on().unwrap()
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}
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fn create_gpu_instance() -> Instance {
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Instance::new(&wgpu::InstanceDescriptor {
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backends: wgpu::Backends::PRIMARY,
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..Default::default()
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})
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}
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pub(crate) fn resize(&mut self, new_size: PhysicalSize<u32>) {
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self.size = new_size;
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self.config.width = max(new_size.width, 1);
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self.config.height = max(new_size.height, 1);
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self.surface.configure(&self.device, &self.config);
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let new_globals = Globals {
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aspect_ratio: self.config.width as f32 / self.config.height as f32,
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};
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self.queue.write_buffer(&self.global_buffer, 0, bytemuck::cast_slice(&[new_globals]));
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println!("Resized to {:?} from state!", new_size);
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}
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pub(crate) fn render(&mut self) -> Result<(), wgpu::SurfaceError> {
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let output = self.surface.get_current_texture()?;
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let multisampled_texture = self.device.create_texture(&wgpu::TextureDescriptor {
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label: Some("Multisampled Render Target"),
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size: wgpu::Extent3d {
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width: self.config.width,
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height: self.config.height,
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depth_or_array_layers: 1,
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},
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mip_level_count: 1,
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sample_count: self.sample_count.get(),
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dimension: wgpu::TextureDimension::D2,
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format: self.config.format,
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usage: wgpu::TextureUsages::RENDER_ATTACHMENT,
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view_formats: &[],
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});
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let multisampled_view = multisampled_texture.create_view(&Default::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: &[Some(wgpu::RenderPassColorAttachment {
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view: &multisampled_view,
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resolve_target: Some(&output.texture.create_view(&Default::default())),
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ops: wgpu::Operations {
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load: wgpu::LoadOp::Clear(wgpu::Color {
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r: 1.0,
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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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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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render_pass.set_pipeline(&self.render_pipeline);
|
||
|
|
render_pass.set_bind_group(0, &self.global_bind_group, &[]);
|
||
|
|
|
||
|
|
for shape in [Shape::Polygon, Shape::Circle] {
|
||
|
|
let geometry = &self.geometries[&shape];
|
||
|
|
|
||
|
|
let relevant_instances: Vec<_> = self.instances
|
||
|
|
.iter()
|
||
|
|
.enumerate()
|
||
|
|
.filter(|(_, inst)| inst.shape == shape)
|
||
|
|
.map(|(i, _)| i as u32)
|
||
|
|
.collect();
|
||
|
|
|
||
|
|
if relevant_instances.is_empty() {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
render_pass.set_vertex_buffer(0, geometry.vertex_buffer.slice(..));
|
||
|
|
render_pass.set_vertex_buffer(1, self.instance_buffer.slice(..));
|
||
|
|
render_pass.set_index_buffer(geometry.index_buffer.slice(..), wgpu::IndexFormat::Uint16);
|
||
|
|
render_pass.draw_indexed(0..geometry.index_count, 0, 0..relevant_instances.len() as u32);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
self.queue.submit(std::iter::once(encoder.finish()));
|
||
|
|
output.present();
|
||
|
|
|
||
|
|
Ok(())
|
||
|
|
}
|
||
|
|
|
||
|
|
pub fn set_instances(&mut self, instances: Vec<RenderInstance>) {
|
||
|
|
let raw_data: Vec<InstanceRaw> = instances.iter().map(RenderInstance::to_raw).collect();
|
||
|
|
let byte_len = (raw_data.len() * size_of::<InstanceRaw>()) as wgpu::BufferAddress;
|
||
|
|
|
||
|
|
// Resize the buffer if necessary
|
||
|
|
if byte_len > self.instance_buffer.size() {
|
||
|
|
self.instance_buffer = self.device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
|
||
|
|
label: Some("Instance Buffer (resized)"),
|
||
|
|
contents: bytemuck::cast_slice(&raw_data),
|
||
|
|
usage: wgpu::BufferUsages::VERTEX | wgpu::BufferUsages::COPY_DST,
|
||
|
|
});
|
||
|
|
} else {
|
||
|
|
self.queue.write_buffer(&self.instance_buffer, 0, bytemuck::cast_slice(&raw_data));
|
||
|
|
}
|
||
|
|
|
||
|
|
self.instances = instances;
|
||
|
|
}
|
||
|
|
|
||
|
|
pub fn window(&self) -> &Window {
|
||
|
|
&self.window
|
||
|
|
}
|
||
|
|
}
|