mirror of https://github.com/sotrh/learn-wgpu
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
251 lines
8.0 KiB
Rust
251 lines
8.0 KiB
Rust
mod buffer;
|
|
mod camera;
|
|
mod light;
|
|
mod model;
|
|
mod pipeline;
|
|
pub mod prelude;
|
|
mod texture;
|
|
|
|
pub use buffer::*;
|
|
pub use camera::*;
|
|
pub use light::*;
|
|
pub use model::*;
|
|
pub use pipeline::*;
|
|
pub use texture::*;
|
|
|
|
use anyhow::*;
|
|
use cgmath::*;
|
|
use std::time::{Duration, Instant};
|
|
use wgpu::util::{BufferInitDescriptor, DeviceExt};
|
|
use winit::event::*;
|
|
use winit::event_loop::{ControlFlow, EventLoop};
|
|
use winit::window::{Window, WindowBuilder};
|
|
|
|
pub struct Display {
|
|
surface: wgpu::Surface,
|
|
pub sc_desc: wgpu::SwapChainDescriptor,
|
|
pub swap_chain: wgpu::SwapChain,
|
|
pub device: wgpu::Device,
|
|
pub queue: wgpu::Queue,
|
|
}
|
|
|
|
impl Display {
|
|
pub async fn new(window: &Window) -> Result<Self, Error> {
|
|
let size = window.inner_size();
|
|
let instance = wgpu::Instance::new(wgpu::BackendBit::PRIMARY);
|
|
let surface = unsafe { instance.create_surface(window) };
|
|
let adapter = instance
|
|
.request_adapter(&wgpu::RequestAdapterOptions {
|
|
power_preference: wgpu::PowerPreference::Default,
|
|
compatible_surface: Some(&surface),
|
|
})
|
|
.await
|
|
.unwrap();
|
|
let (device, queue) = adapter
|
|
.request_device(
|
|
&wgpu::DeviceDescriptor {
|
|
features: wgpu::Features::empty(),
|
|
limits: wgpu::Limits::default(),
|
|
shader_validation: true,
|
|
},
|
|
None,
|
|
)
|
|
.await
|
|
.unwrap();
|
|
let sc_desc = wgpu::SwapChainDescriptor {
|
|
usage: wgpu::TextureUsage::OUTPUT_ATTACHMENT,
|
|
format: wgpu::TextureFormat::Bgra8UnormSrgb,
|
|
width: size.width,
|
|
height: size.height,
|
|
present_mode: wgpu::PresentMode::Fifo,
|
|
};
|
|
let swap_chain = device.create_swap_chain(&surface, &sc_desc);
|
|
|
|
Ok(Self {
|
|
surface,
|
|
sc_desc,
|
|
swap_chain,
|
|
device,
|
|
queue,
|
|
})
|
|
}
|
|
|
|
pub fn resize(&mut self, width: u32, height: u32) {
|
|
self.sc_desc.width = width;
|
|
self.sc_desc.height = height;
|
|
self.swap_chain = self.device.create_swap_chain(&self.surface, &self.sc_desc);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Holds the camera data to be passed to wgpu.
|
|
*/
|
|
#[repr(C)]
|
|
#[derive(Copy, Clone)]
|
|
pub struct UniformData {
|
|
view_position: cgmath::Vector4<f32>,
|
|
view_proj: cgmath::Matrix4<f32>,
|
|
}
|
|
|
|
unsafe impl bytemuck::Zeroable for UniformData {}
|
|
unsafe impl bytemuck::Pod for UniformData {}
|
|
|
|
pub struct Uniforms {
|
|
data: UniformData,
|
|
buffer: wgpu::Buffer,
|
|
}
|
|
|
|
impl Uniforms {
|
|
pub fn new(device: &wgpu::Device) -> Self {
|
|
let data = UniformData {
|
|
view_position: Zero::zero(),
|
|
view_proj: cgmath::Matrix4::identity(),
|
|
};
|
|
let buffer = device.create_buffer_init(&BufferInitDescriptor {
|
|
label: Some("Uniform Buffer"),
|
|
contents: bytemuck::cast_slice(&[data]),
|
|
usage: wgpu::BufferUsage::COPY_DST | wgpu::BufferUsage::UNIFORM,
|
|
});
|
|
|
|
Self { data, buffer }
|
|
}
|
|
|
|
pub fn update_view_proj(&mut self, camera: &camera::Camera, projection: &camera::Projection) {
|
|
self.data.view_position = camera.position.to_homogeneous();
|
|
self.data.view_proj = projection.calc_matrix() * camera.calc_matrix()
|
|
}
|
|
|
|
pub fn update_buffer(&self, device: &wgpu::Device, encoder: &mut wgpu::CommandEncoder) {
|
|
let staging_buffer = device.create_buffer_init(&BufferInitDescriptor {
|
|
label: Some("Uniform Update Buffer"),
|
|
contents: bytemuck::cast_slice(&[self.data]),
|
|
usage: wgpu::BufferUsage::COPY_SRC,
|
|
});
|
|
encoder.copy_buffer_to_buffer(
|
|
&staging_buffer,
|
|
0,
|
|
&self.buffer,
|
|
0,
|
|
std::mem::size_of::<UniformData>() as _,
|
|
);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Holds the wgpu::BindGroupLayout and one wgpu::BindGroup for the
|
|
* just the Uniforms struct.
|
|
*/
|
|
pub struct UniformBinding {
|
|
pub layout: wgpu::BindGroupLayout,
|
|
pub bind_group: wgpu::BindGroup,
|
|
}
|
|
|
|
impl UniformBinding {
|
|
pub fn new(device: &wgpu::Device, uniforms: &Uniforms) -> Self {
|
|
let layout = device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
|
|
entries: &[wgpu::BindGroupLayoutEntry {
|
|
binding: 0,
|
|
visibility: wgpu::ShaderStage::VERTEX | wgpu::ShaderStage::FRAGMENT,
|
|
ty: wgpu::BindingType::UniformBuffer {
|
|
dynamic: false,
|
|
min_binding_size: None,
|
|
},
|
|
count: None,
|
|
}],
|
|
label: Some("UniformBinding::layout"),
|
|
});
|
|
let bind_group = device.create_bind_group(&wgpu::BindGroupDescriptor {
|
|
layout: &layout,
|
|
entries: &[wgpu::BindGroupEntry {
|
|
binding: 0,
|
|
resource: wgpu::BindingResource::Buffer(uniforms.buffer.slice(..)),
|
|
}],
|
|
label: Some("UniformBinding::bind_group"),
|
|
});
|
|
|
|
Self { layout, bind_group }
|
|
}
|
|
|
|
pub fn rebind(&mut self, device: &wgpu::Device, uniforms: &Uniforms) {
|
|
self.bind_group = device.create_bind_group(&wgpu::BindGroupDescriptor {
|
|
layout: &self.layout,
|
|
entries: &[wgpu::BindGroupEntry {
|
|
binding: 0,
|
|
resource: wgpu::BindingResource::Buffer(uniforms.buffer.slice(..)),
|
|
}],
|
|
label: Some("UniformBinding::bind_group"),
|
|
});
|
|
}
|
|
}
|
|
|
|
pub trait Demo: 'static + Sized {
|
|
fn init(display: &Display) -> Result<Self, Error>;
|
|
fn process_mouse(&mut self, dx: f64, dy: f64);
|
|
fn resize(&mut self, display: &Display);
|
|
fn update(&mut self, display: &Display, dt: Duration);
|
|
fn render(&mut self, display: &mut Display);
|
|
}
|
|
|
|
pub async fn run<D: Demo>() -> Result<(), Error> {
|
|
let event_loop = EventLoop::new();
|
|
let window = WindowBuilder::new()
|
|
.with_title(env!("CARGO_PKG_NAME"))
|
|
.build(&event_loop)?;
|
|
let mut display = Display::new(&window).await?;
|
|
let mut demo = D::init(&mut display)?;
|
|
let mut last_update = Instant::now();
|
|
let mut is_resumed = true;
|
|
let mut is_focused = true;
|
|
|
|
event_loop.run(move |event, _, control_flow| {
|
|
*control_flow = if is_resumed && is_focused {
|
|
ControlFlow::Poll
|
|
} else {
|
|
ControlFlow::Wait
|
|
};
|
|
|
|
match event {
|
|
Event::Resumed => is_resumed = true,
|
|
Event::Suspended => is_resumed = false,
|
|
Event::RedrawRequested(wid) => {
|
|
if wid == window.id() {
|
|
let now = Instant::now();
|
|
let dt = now - last_update;
|
|
last_update = now;
|
|
|
|
demo.update(&mut display, dt);
|
|
demo.render(&mut display);
|
|
}
|
|
}
|
|
Event::MainEventsCleared => {
|
|
if is_focused && is_resumed {
|
|
window.request_redraw();
|
|
} else {
|
|
// Freeze time while the demo is not in the foreground
|
|
last_update = Instant::now();
|
|
}
|
|
}
|
|
Event::WindowEvent {
|
|
event, window_id, ..
|
|
} => {
|
|
if window_id == window.id() {
|
|
match event {
|
|
WindowEvent::CloseRequested => *control_flow = ControlFlow::Exit,
|
|
WindowEvent::Focused(f) => is_focused = f,
|
|
WindowEvent::ScaleFactorChanged { new_inner_size, .. } => {
|
|
display.resize(new_inner_size.width, new_inner_size.height);
|
|
demo.resize(&mut display);
|
|
}
|
|
WindowEvent::Resized(new_inner_size) => {
|
|
display.resize(new_inner_size.width, new_inner_size.height);
|
|
demo.resize(&mut display);
|
|
}
|
|
_ => {}
|
|
}
|
|
}
|
|
}
|
|
_ => {}
|
|
}
|
|
});
|
|
}
|