728 lines
22 KiB
Rust
728 lines
22 KiB
Rust
use wgpu::util::DeviceExt;
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use winit::{
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event::*,
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event_loop::{ControlFlow, EventLoop},
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window::WindowBuilder,
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};
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mod camera;
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mod commands;
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mod mesh;
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use camera::*;
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use commands::*;
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use mesh::*;
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struct Renderer {
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pub device: wgpu::Device,
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pub mesh_pool: MeshPool,
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pub texture_pool: TexturePool,
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pub size: winit::dpi::PhysicalSize<u32>,
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surface: wgpu::Surface,
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queue: wgpu::Queue,
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config: wgpu::SurfaceConfiguration,
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camera_uniform: CameraUniform,
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camera_buffer: wgpu::Buffer,
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camera_bind_group: wgpu::BindGroup,
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meshes_buffer: wgpu::Buffer,
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meshes_bind_group: wgpu::BindGroup,
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render_pipeline: wgpu::RenderPipeline,
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}
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impl Renderer {
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pub async fn new(window: &winit::window::Window) -> Self {
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let size = window.inner_size();
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let instance = wgpu::Instance::new(wgpu::Backends::all());
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let surface = unsafe { instance.create_surface(window) };
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let adapter = instance
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.request_adapter(&wgpu::RequestAdapterOptions {
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power_preference: wgpu::PowerPreference::HighPerformance,
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compatible_surface: Some(&surface),
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force_fallback_adapter: false,
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})
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.await
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.unwrap();
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let (device, queue) = adapter
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.request_device(
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&wgpu::DeviceDescriptor {
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features: wgpu::Features::empty(),
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limits: wgpu::Limits::default(),
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label: None,
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},
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None,
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)
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.await
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.unwrap();
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let config = wgpu::SurfaceConfiguration {
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usage: wgpu::TextureUsages::RENDER_ATTACHMENT,
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format: surface.get_preferred_format(&adapter).unwrap(),
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width: size.width,
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height: size.height,
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present_mode: wgpu::PresentMode::Fifo,
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};
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surface.configure(&device, &config);
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let mesh_pool = MeshPool::default();
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let texture_pool = TexturePool::new(&device);
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let camera_uniform = CameraUniform::new();
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let camera_buffer = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
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label: Some("Camera Buffer"),
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contents: bytemuck::cast_slice(&[camera_uniform]),
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usage: wgpu::BufferUsages::UNIFORM | wgpu::BufferUsages::COPY_DST,
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});
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let camera_bind_group_layout =
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device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
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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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label: Some("Camera Bind Group Layout"),
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});
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let camera_bind_group = device.create_bind_group(&wgpu::BindGroupDescriptor {
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layout: &camera_bind_group_layout,
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entries: &[wgpu::BindGroupEntry {
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binding: 0,
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resource: camera_buffer.as_entire_binding(),
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}],
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label: Some("Camera Bind Group"),
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});
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let meshes_buffer = device.create_buffer(&wgpu::BufferDescriptor {
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label: Some("Meshes Buffer"),
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size: 65536, // TODO resizable meshes buffer/gpu vectors
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usage: wgpu::BufferUsages::STORAGE | wgpu::BufferUsages::COPY_DST,
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mapped_at_creation: false,
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});
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let meshes_bind_group_layout =
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device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
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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::Storage { read_only: true },
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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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label: Some("Meshes Bind Group Layout"),
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});
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let meshes_bind_group = device.create_bind_group(&wgpu::BindGroupDescriptor {
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layout: &meshes_bind_group_layout,
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entries: &[wgpu::BindGroupEntry {
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binding: 0,
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resource: meshes_buffer.as_entire_binding(),
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}],
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label: Some("Meshes Bind Group"),
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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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&camera_bind_group_layout,
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&meshes_bind_group_layout,
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&texture_pool.bind_group_layout,
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],
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push_constant_ranges: &[],
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});
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let shader = device.create_shader_module(&wgpu::include_wgsl!("shader.wgsl"));
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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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},
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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: &[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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}),
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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: None,
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polygon_mode: wgpu::PolygonMode::Fill,
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unclipped_depth: false,
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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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});
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Self {
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size,
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surface,
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device,
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queue,
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config,
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mesh_pool,
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texture_pool,
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camera_uniform,
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camera_buffer,
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camera_bind_group,
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meshes_buffer,
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meshes_bind_group,
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render_pipeline,
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}
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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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pub fn render(
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&mut self,
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camera: &impl Camera,
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meshes: &Vec<MeshInstance>,
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) -> Result<(), wgpu::SurfaceError> {
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self.camera_uniform.update(camera);
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self.queue.write_buffer(
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&self.camera_buffer,
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0,
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bytemuck::cast_slice(&[self.camera_uniform]),
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);
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let mesh_commands = commands::MeshCommands::build(meshes);
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// TODO persistent staging buffer (write_buffer creates a new one per call)
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self.queue
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.write_buffer(&self.meshes_buffer, 0, mesh_commands.get_storage());
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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 rp = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
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label: Some("Render Pass"),
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color_attachments: &[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(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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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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rp.set_pipeline(&self.render_pipeline);
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rp.set_bind_group(0, &self.camera_bind_group, &[]);
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rp.set_bind_group(1, &self.meshes_bind_group, &[]);
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mesh_commands.dispatch(&mut rp, &self.mesh_pool, &self.texture_pool);
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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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Ok(())
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}
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}
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pub struct MeshGroup {
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vertices: wgpu::Buffer,
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vertex_capacity: usize,
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indices: wgpu::Buffer,
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index_capacity: usize,
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}
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impl MeshGroup {
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fn new(device: &wgpu::Device, data: &MeshData) -> Self {
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let vertex_capacity = data.vertices.len();
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let vertices = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
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label: Some("Vertex Buffer"),
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contents: bytemuck::cast_slice(&data.vertices),
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usage: wgpu::BufferUsages::VERTEX,
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});
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let index_capacity = data.indices.len();
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let indices = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
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label: Some("Index Buffer"),
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contents: bytemuck::cast_slice(&data.indices),
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usage: wgpu::BufferUsages::INDEX,
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});
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Self {
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vertex_capacity,
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vertices,
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index_capacity,
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indices,
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}
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}
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}
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#[derive(Default)]
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pub struct MeshPool {
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groups: slab::Slab<MeshGroup>,
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}
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impl MeshPool {
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pub fn allocate(&mut self, device: &wgpu::Device, data: &MeshData) -> MeshHandle {
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let group = MeshGroup::new(device, data);
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let group_id = self.groups.insert(group);
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let sub_id = 0;
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MeshHandle { group_id, sub_id }
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}
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pub fn get_group(&self, handle: &MeshHandle) -> Option<&MeshGroup> {
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self.groups.get(handle.group_id)
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}
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}
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pub struct TextureData {
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width: u32,
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height: u32,
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data: Vec<u8>,
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}
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pub struct Texture {
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texture: wgpu::Texture,
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bind_group: wgpu::BindGroup,
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}
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impl Texture {
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pub fn new(
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device: &wgpu::Device,
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queue: &wgpu::Queue,
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sampler: &wgpu::Sampler,
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bind_group_layout: &wgpu::BindGroupLayout,
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data: &TextureData,
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) -> Self {
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let size = wgpu::Extent3d {
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width: data.width,
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height: data.height,
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depth_or_array_layers: 1,
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};
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let texture = device.create_texture(&wgpu::TextureDescriptor {
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size,
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mip_level_count: 1,
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sample_count: 1,
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dimension: wgpu::TextureDimension::D2,
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format: wgpu::TextureFormat::Rgba8UnormSrgb,
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usage: wgpu::TextureUsages::TEXTURE_BINDING | wgpu::TextureUsages::COPY_DST,
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label: None,
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});
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let texture_view = texture.create_view(&wgpu::TextureViewDescriptor::default());
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queue.write_texture(
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wgpu::ImageCopyTexture {
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texture: &texture,
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mip_level: 0,
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origin: wgpu::Origin3d::ZERO,
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aspect: wgpu::TextureAspect::All,
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},
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&data.data,
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wgpu::ImageDataLayout {
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offset: 0,
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bytes_per_row: std::num::NonZeroU32::new(4 * size.width),
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rows_per_image: std::num::NonZeroU32::new(size.height),
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},
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size,
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);
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let bind_group = device.create_bind_group(&wgpu::BindGroupDescriptor {
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layout: &bind_group_layout,
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entries: &[
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wgpu::BindGroupEntry {
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binding: 0,
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resource: wgpu::BindingResource::TextureView(&texture_view),
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},
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wgpu::BindGroupEntry {
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binding: 1,
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resource: wgpu::BindingResource::Sampler(sampler),
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},
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],
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label: None,
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});
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Texture {
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texture,
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bind_group,
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}
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}
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}
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pub struct TexturePool {
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textures: slab::Slab<Texture>,
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sampler: wgpu::Sampler,
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bind_group_layout: wgpu::BindGroupLayout,
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}
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impl TexturePool {
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pub fn new(device: &wgpu::Device) -> Self {
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let textures = Default::default();
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let sampler = device.create_sampler(&wgpu::SamplerDescriptor {
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address_mode_u: wgpu::AddressMode::ClampToEdge,
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address_mode_v: wgpu::AddressMode::ClampToEdge,
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address_mode_w: wgpu::AddressMode::ClampToEdge,
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mag_filter: wgpu::FilterMode::Linear,
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min_filter: wgpu::FilterMode::Nearest,
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mipmap_filter: wgpu::FilterMode::Nearest,
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..Default::default()
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});
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let bind_group_layout = device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
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entries: &[
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wgpu::BindGroupLayoutEntry {
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binding: 0,
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visibility: wgpu::ShaderStages::FRAGMENT,
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ty: wgpu::BindingType::Texture {
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multisampled: false,
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view_dimension: wgpu::TextureViewDimension::D2,
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sample_type: wgpu::TextureSampleType::Float { filterable: true },
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},
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count: None,
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},
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wgpu::BindGroupLayoutEntry {
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binding: 1,
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visibility: wgpu::ShaderStages::FRAGMENT,
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ty: wgpu::BindingType::Sampler(wgpu::SamplerBindingType::Filtering),
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count: None,
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},
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],
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label: Some("Texture Bind Group Layout"),
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});
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Self {
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textures,
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sampler,
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bind_group_layout,
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}
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}
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pub fn allocate(
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&mut self,
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device: &wgpu::Device,
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queue: &wgpu::Queue,
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data: &TextureData,
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) -> TextureHandle {
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let texture = Texture::new(device, queue, &self.sampler, &self.bind_group_layout, data);
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let id = self.textures.insert(texture);
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TextureHandle { id }
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}
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}
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#[repr(C)]
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#[derive(Copy, Clone, bytemuck::Pod, bytemuck::Zeroable)]
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struct CameraUniform {
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vp: [[f32; 4]; 4],
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}
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impl CameraUniform {
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pub fn new() -> Self {
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Self {
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vp: glam::Mat4::IDENTITY.to_cols_array_2d(),
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}
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}
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pub fn update(&mut self, camera: &impl Camera) {
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self.vp = camera.get_vp();
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}
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}
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#[repr(C)]
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#[derive(Copy, Clone, Eq, Hash, PartialEq)]
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pub struct MeshHandle {
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group_id: usize,
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// unused for now, since each group contains only one mesh
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sub_id: usize,
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}
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#[repr(C)]
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#[derive(Copy, Clone, Eq, Hash, PartialEq)]
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pub struct TextureHandle {
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// only flat texture ID is used... for now
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id: usize,
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}
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fn load_model() -> (MeshData, TextureData) {
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use tobj::*;
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let model_data = include_bytes!("viking_room.obj").to_vec();
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let model_data = &mut model_data.as_slice();
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let load_options = LoadOptions {
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triangulate: true,
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single_index: true,
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..Default::default()
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};
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let (models, _mats) = load_obj_buf(model_data, &load_options, |_| unimplemented!()).unwrap();
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let mut vertices = Vec::new();
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let mut indices = Vec::new();
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let m = models.first().unwrap();
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let index_base = vertices.len() as u32;
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for i in 0..m.mesh.positions.len() / 3 {
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let t = i * 3;
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vertices.push(Vertex {
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position: [
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m.mesh.positions[t],
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m.mesh.positions[t + 2],
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-m.mesh.positions[t + 1],
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],
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tex_coords: [m.mesh.texcoords[i * 2], 1.0 - m.mesh.texcoords[i * 2 + 1]],
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});
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}
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indices.extend(m.mesh.indices.iter().map(|i| i + index_base));
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let albedo_data = include_bytes!("viking_room.png");
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let albedo = image::load_from_memory(albedo_data).unwrap();
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use image::GenericImageView;
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let dimensions = albedo.dimensions();
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let albedo_rgb = albedo.as_rgb8().unwrap().to_vec();
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let mut albedo_rgba = Vec::<u8>::new();
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for rgb in albedo_rgb.chunks(3) {
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albedo_rgba.extend_from_slice(rgb);
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albedo_rgba.push(0xff);
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}
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(
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MeshData { vertices, indices },
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TextureData {
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width: dimensions.0,
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height: dimensions.1,
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data: albedo_rgba,
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},
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)
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}
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trait WorldState {
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fn update(&mut self);
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fn render(&self) -> Vec<MeshInstance>;
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}
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struct Grid {
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meshes: Vec<MeshInstance>,
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}
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impl Grid {
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fn new(ren: &mut Renderer) -> Self {
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let (mesh_data, albedo_data) = load_model();
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let mesh = ren.mesh_pool.allocate(&ren.device, &mesh_data);
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let albedo = ren
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.texture_pool
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.allocate(&ren.device, &ren.queue, &albedo_data);
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let mut meshes = Vec::new();
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for x in -5..5 {
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for y in -5..5 {
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let translation = glam::Vec3::new(x as f32, 0.0, y as f32) * 3.0;
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let transform = glam::Mat4::from_translation(translation);
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meshes.push(MeshInstance {
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mesh,
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albedo,
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transform,
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});
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}
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}
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Self { meshes }
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}
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}
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impl WorldState for Grid {
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fn update(&mut self) {}
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fn render(&self) -> Vec<MeshInstance> {
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self.meshes.clone()
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}
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}
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struct Planet {
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speed: f32,
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offset: f32,
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radius: f32,
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size: f32,
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}
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struct Planets {
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start: std::time::Instant,
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planets: Vec<Planet>,
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mesh: MeshHandle,
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albedo: TextureHandle,
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}
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impl Planets {
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fn new(ren: &mut Renderer) -> Self {
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let start = std::time::Instant::now();
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let (mesh_data, albedo_data) = load_model();
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let mesh = ren.mesh_pool.allocate(&ren.device, &mesh_data);
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let albedo = ren
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.texture_pool
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.allocate(&ren.device, &ren.queue, &albedo_data);
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let mut planets = Vec::new();
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for i in 0..10 {
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let i = i as f32;
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planets.push(Planet {
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speed: 1.618 * 1.5 / i,
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offset: 0.0,
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radius: i * 2.0,
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size: 0.5,
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});
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}
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Self {
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start,
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planets,
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mesh,
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albedo,
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}
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}
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}
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|
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impl WorldState for Planets {
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fn update(&mut self) {}
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fn render(&self) -> Vec<MeshInstance> {
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let elapsed = self.start.elapsed().as_secs_f32();
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|
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let mut meshes = Vec::new();
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for planet in self.planets.iter() {
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let translation = glam::Vec3::new(0.0, 0.0, planet.radius);
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let translation = glam::Mat4::from_translation(translation);
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let theta = planet.speed * elapsed + planet.offset;
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let rotation = glam::Mat4::from_rotation_y(theta);
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meshes.push(MeshInstance {
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mesh: self.mesh,
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albedo: self.albedo,
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transform: rotation * translation,
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});
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}
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|
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meshes
|
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}
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}
|
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|
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fn main() {
|
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let event_loop = EventLoop::new();
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let window = WindowBuilder::new().build(&event_loop).unwrap();
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let mut camera = Flycam::new(10.0, 0.002);
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let mut is_grabbed = false;
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let mut ren = pollster::block_on(Renderer::new(&window));
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// let mut state: Box<dyn WorldState> = Box::new(Planets::new(&mut ren));
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let mut state: Box<dyn WorldState> = Box::new(Grid::new(&mut ren));
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|
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event_loop.run(move |event, _, control_flow| match event {
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Event::RedrawRequested(_) => match ren.render(&camera, &state.render()) {
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Ok(_) => {}
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Err(wgpu::SurfaceError::Lost) => ren.resize(ren.size),
|
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Err(wgpu::SurfaceError::OutOfMemory) => *control_flow = ControlFlow::Exit,
|
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Err(e) => println!("error: {:?}", e),
|
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},
|
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Event::MainEventsCleared => {
|
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camera.update();
|
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state.update();
|
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window.request_redraw();
|
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}
|
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Event::DeviceEvent { ref event, .. } => match event {
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DeviceEvent::MouseMotion { delta } => {
|
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if is_grabbed {
|
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camera.process_mouse(delta.0, delta.1);
|
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}
|
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}
|
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_ => {}
|
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},
|
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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 == window.id() => match event {
|
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WindowEvent::KeyboardInput {
|
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input:
|
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KeyboardInput {
|
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virtual_keycode: Some(key),
|
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state,
|
|
..
|
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},
|
|
..
|
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} => {
|
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if *state == ElementState::Pressed && *key == VirtualKeyCode::Escape {
|
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if is_grabbed {
|
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window.set_cursor_grab(false).unwrap();
|
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window.set_cursor_visible(true);
|
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is_grabbed = false;
|
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}
|
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} else {
|
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camera.process_keyboard(*key, *state);
|
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}
|
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}
|
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WindowEvent::MouseInput {
|
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button: MouseButton::Left,
|
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state: ElementState::Pressed,
|
|
..
|
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} => {
|
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if !is_grabbed {
|
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window.set_cursor_grab(true).unwrap();
|
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window.set_cursor_visible(false);
|
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is_grabbed = true;
|
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}
|
|
}
|
|
WindowEvent::CloseRequested => *control_flow = ControlFlow::Exit,
|
|
WindowEvent::Resized(physical_size) => {
|
|
ren.resize(*physical_size);
|
|
camera.resize(physical_size.width, physical_size.height);
|
|
}
|
|
WindowEvent::ScaleFactorChanged { new_inner_size, .. } => {
|
|
ren.resize(**new_inner_size);
|
|
camera.resize(new_inner_size.width, new_inner_size.height);
|
|
}
|
|
_ => {}
|
|
},
|
|
_ => {}
|
|
});
|
|
}
|